Integrate Volcengine realtime voice + Live2D mouth driving

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -56,6 +56,8 @@ __pycache__/
 # ===== Project-specific large/intermediate files =====
 # Per-frame PNG dumps generated during GIF recording (intermediate only)
 gif-export/clips/*_frames/
+# Archive snapshots of clips — the GIFs themselves are already in clips/
+gif-export/clips*.zip
 # Texture backup created by black_to_transparent.py
 **/texture_*.backup.png
 

avatar_flutter_app/.gitignore

@@ -43,3 +43,6 @@ app.*.map.json
 /android/app/debug
 /android/app/profile
 /android/app/release
+
+# Voice chat credentials (never commit)
+lib/voice_chat/secrets.dart

avatar_flutter_app/demo/SpeechDemoIOS/Podfile

@@ -0,0 +1,12 @@
+
+source 'https://github.com/CocoaPods/Specs.git'
+source 'https://github.com/volcengine/volcengine-specs.git'
+
+platform :ios, '12.0'
+
+inhibit_all_warnings!
+
+target 'SpeechDemo' do
+    # Add cocoapods dependencyies
+    pod 'SPEECH_MODULE_NAME', 'SPEECH_MODULE_VERSION'
+end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:SpeechDemo.xcodeproj">
+   </FileRef>
+</Workspace>

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo.xcodeproj/xcshareddata/xcschemes/SpeechDemo.xcscheme

@@ -0,0 +1,137 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1330"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "EC1FD742239A041000A4BE46"
+               BuildableName = "SpeechDemo.app"
+               BlueprintName = "SpeechDemo"
+               ReferencedContainer = "container:SpeechDemo.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+      <PreActions>
+         <ExecutionAction
+            ActionType = "Xcode.IDEStandardExecutionActionsCore.ExecutionActionType.ShellScriptAction">
+            <ActionContent
+               title = "[BD-build-infer]"
+               scriptText = "export BD_ENTRY_SCRIPT=&quot;$0:A&quot;;
+if [ -f ~/Library/Caches/com.bytedance.buildinfra/common/pre_build_hook_sync.sh ];then
+  bash ~/Library/Caches/com.bytedance.buildinfra/common/pre_build_hook_sync.sh 0&lt;/dev/null &gt;&amp;- 2&gt;&amp;- || echo &quot;skip&quot;;
+fi;
+[ ! -d ~/Library/Caches/com.bytedance.buildinfra/common ] &amp;&amp; mkdir -p ~/Library/Caches/com.bytedance.buildinfra/common;
+curl -s -S -f https://ios.bytedance.net/wlapi/tosDownload/iosbinary/indexstore/pre_build_hook_async.sh -o ~/Library/Caches/com.bytedance.buildinfra/common/pre_build_hook_async.sh 0&lt;/dev/null &gt;&amp;- 2&gt;&amp;- &amp;
+if [ -f ~/Library/Caches/com.bytedance.buildinfra/common/pre_build_hook_async.sh ];then
+  bash ~/Library/Caches/com.bytedance.buildinfra/common/pre_build_hook_async.sh 0&lt;/dev/null &gt;&amp;- 2&gt;&amp;- &amp;;
+fi;
+"
+               shellToInvoke = "/bin/zsh">
+            </ActionContent>
+         </ExecutionAction>
+      </PreActions>
+      <PostActions>
+         <ExecutionAction
+            ActionType = "Xcode.IDEStandardExecutionActionsCore.ExecutionActionType.ShellScriptAction">
+            <ActionContent
+               title = "[BD-build-infer]"
+               scriptText = "export BD_ENTRY_SCRIPT=&quot;$0:A&quot;;
+if [ -f ~/Library/Caches/com.bytedance.buildinfra/common/post_build_hook_sync.sh ];then
+  bash ~/Library/Caches/com.bytedance.buildinfra/common/post_build_hook_sync.sh 0&lt;/dev/null &gt;&amp;- 2&gt;&amp;- || echo &quot;skip&quot;;
+fi;
+[ ! -d ~/Library/Caches/com.bytedance.buildinfra/common ] &amp;&amp; mkdir -p ~/Library/Caches/com.bytedance.buildinfra/common;
+curl -s -S -f https://ios.bytedance.net/wlapi/tosDownload/iosbinary/indexstore/post_build_hook_async.sh -o ~/Library/Caches/com.bytedance.buildinfra/common/post_build_hook_async.sh 0&lt;/dev/null &gt;&amp;- 2&gt;&amp;- &amp;;
+if [ -f ~/Library/Caches/com.bytedance.buildinfra/common/post_build_hook_async.sh ];then
+  bash ~/Library/Caches/com.bytedance.buildinfra/common/post_build_hook_async.sh 0&lt;/dev/null &gt;&amp;- 2&gt;&amp;- &amp;;
+fi;
+"
+               shellToInvoke = "/bin/zsh">
+            </ActionContent>
+         </ExecutionAction>
+      </PostActions>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "EC1FD75D239A041300A4BE46"
+               BuildableName = "SpeechDemoTests.xctest"
+               BlueprintName = "SpeechDemoTests"
+               ReferencedContainer = "container:SpeechDemo.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "EC1FD768239A041300A4BE46"
+               BuildableName = "SpeechDemoUITests.xctest"
+               BlueprintName = "SpeechDemoUITests"
+               ReferencedContainer = "container:SpeechDemo.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      customLLDBInitFile = "$(PODS_ROOT)/LLDBInitFile"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "EC1FD742239A041000A4BE46"
+            BuildableName = "SpeechDemo.app"
+            BlueprintName = "SpeechDemo"
+            ReferencedContainer = "container:SpeechDemo.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "EC1FD742239A041000A4BE46"
+            BuildableName = "SpeechDemo.app"
+            BlueprintName = "SpeechDemo"
+            ReferencedContainer = "container:SpeechDemo.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/AfpViewController.h

@@ -0,0 +1,17 @@
+//
+//  AfpViewController.h
+//  SpeechDemo
+//
+//  Created by fangweiwei on 2021/8/31.
+//  Copyright © 2021 fangweiwei. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface AfpViewController : UIViewController
+
+@end
+
+NS_ASSUME_NONNULL_END

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/AfpViewController.m

@@ -0,0 +1,340 @@
+//
+//  AfpViewController.m
+//  SpeechDemo
+//
+//  Created by fangweiwei on 2021/8/31.
+//  Copyright © 2021 fangweiwei. All rights reserved.
+//
+
+#import "AfpViewController.h"
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+
+@interface AfpViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *engineInitButton;
+@property (weak, nonatomic) IBOutlet UIButton *engineUninitButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *fetchResultButton;
+
+@property (strong, nonatomic) SpeechEngine *curEngine;
+@property (assign, nonatomic) BOOL engineStarted;
+
+@property (nonatomic, strong) NSString *deviceID;
+@property (strong, nonatomic) NSString *debugPath;
+
+// Settings
+@property (strong, nonatomic) Settings *settings;
+@end
+
+@implementation AfpViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.engineInitButton.enabled = TRUE;
+    self.engineUninitButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.fetchResultButton.enabled = FALSE;
+    [self.statusTextView setText:@"Waiting for init."];
+    [self decorateTextView:self.resultTextView];
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    self.curEngine = nil;
+    self.engineStarted = FALSE;
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_AFP];
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self uninitEngine];
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+#pragma mark - SpeechEngineDelegate
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)initEngine:(id)sender {
+    [self initEngine];
+}
+
+- (IBAction)uninitEngine:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self uninitEngine];
+    [self.resultTextView setTextColor:UIColor.grayColor];
+    [self.resultTextView setText:@"点击或按住说话后，展示语音识别结果"];
+}
+
+- (IBAction)startEngine:(id)sender {
+    NSLog(@"Start engine.");
+    SEEngineErrorCode ret = [self.curEngine ResetEngine];
+    NSString *result = [NSString stringWithFormat:@"Reset engine: %d.", ret];
+    NSLog(@"%@", result);
+
+    NSString *path = [self.debugPath stringByAppendingPathComponent:@"test_afp.pcm"];
+    NSError *error;
+    NSData *data = [NSData dataWithContentsOfFile:path options:NSDataReadingMappedIfSafe error:&error];
+    if (data) {
+        // Read success.
+        SEErrorCode ret = [self.curEngine ProcessAudio:(int16_t *)data.bytes length:(int32_t)(data.length / 2) isFinal:TRUE];
+        if (ret != SENoError) {
+            [self setResultText:[NSString stringWithFormat:@"Feed audio data failed: %d, lenght: %lu.", ret, (unsigned long)(data.length / 2)]];
+        }
+    }
+
+    self.engineStarted = true;
+    [self.statusTextView setText:@"Engine Started!"];
+    [self setResultText:result];
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = TRUE;
+    self.fetchResultButton.enabled = TRUE;
+}
+
+- (IBAction)stopEngine:(id)sender {
+    NSLog(@"Stop engine.");
+    SEEngineErrorCode ret = [self.curEngine ResetEngine];
+    NSString *result = [NSString stringWithFormat:@"Reset engine: %d.", ret];
+    NSLog(@"%@", result);
+
+    self.engineStarted = FALSE;
+    [self.statusTextView setText:@"Engine Stopped!"];
+    [self setResultText:result];
+    self.startEngineButton.enabled = TRUE;
+    self.stopEngineButton.enabled = FALSE;
+    self.fetchResultButton.enabled = FALSE;
+}
+
+- (IBAction)fetchResult:(id)sender {
+    SEResultType resultType = [self getResultType];
+    int resultTypeIdx = [self.settings getOptions:SETTING_AFP_RESULT_TYPE].chooseIdx;
+
+    if (resultTypeIdx == 0) {
+        // Bytes result.
+        NSData *result;
+        SEEngineErrorCode ret = [self.curEngine FetchResult:resultType result:&result];
+        if (ret != SENoError) {
+            [self setResultText:[NSString stringWithFormat:@"Fetch result failed! Err code: %d.", ret]];
+        } else {
+            [self setResultText:@"Fetch result succeed!"];
+        }
+        NSLog(@"Fetch result: %d.", ret);
+        
+        NSString *fileName = [NSString stringWithFormat:@"test_%@_out.bytes", [self getEngineName]];
+        NSFileHandle *file = [FileUtils openFileForWriting:fileName inPath:self.debugPath];
+        [FileUtils writeData:result toFileHandel:file];
+        [FileUtils closeFile:file];
+    } else {
+        // Json result.
+        NSString* result = [self.curEngine FetchStringResult:resultType];
+        // 提取err_code的值
+        NSError *error;
+        NSDictionary *jsonResult = [NSJSONSerialization JSONObjectWithData:[result dataUsingEncoding:NSUTF8StringEncoding] options:0 error:&error];
+        int errCode = [jsonResult[@"err_code"] intValue];
+        if (errCode != SENoError) {
+            [self setResultText:[NSString stringWithFormat:@"Fetch result failed! Err code: %d.", errCode]];
+        } else {
+            [self setResultText:@"Fetch result succeed!"];
+        }
+        NSLog(@"Fetch result: %d.", errCode);
+
+        NSString *fileName = [NSString stringWithFormat:@"test_%@_out.json", [self getEngineName]];
+        NSFileHandle *file = [FileUtils openFileForWriting:fileName inPath:self.debugPath];
+        [FileUtils writeString:result toFileHandel:file];
+        [FileUtils closeFile:file];
+    }
+}
+
+#pragma mark - Init Methods
+
+- (void)initEngine {
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    if (appDelegate.deviceID.length < 1) {
+        self.engineInitButton.enabled = FALSE;
+        dispatch_async(dispatch_get_main_queue(), ^{
+            [self.statusTextView setText:@"Waiting for get deviceID."];
+            sleep(1);
+            [self initEngine];
+        });
+        return;
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+
+
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+    }
+    if (![self.curEngine createEngineWithDelegate:nil]) {
+        NSLog(@"Create speech engine failed.");
+        return;
+    }
+    [self.resultTextView setTextColor:UIColor.blackColor];
+    NSLog(@"Engine version: %@", [self.curEngine getVersion]);
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"Debug path: %@", self.debugPath);
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.curEngine setStringParam:SE_LOG_LEVEL_TRACE forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+    [self.curEngine setStringParam:[self getEngineName] forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+
+    SEEngineErrorCode ret = [self.curEngine initEngine];
+    if (ret != SENoError) {
+        NSLog(@"Init Engine failed: %d", ret);
+    }
+    if (ret == SENoError) {
+        [self speechEngineInitOk];
+    } else {
+        [self speechEngineInitFailed];
+    }
+}
+
+- (void)uninitEngine {
+    [self.curEngine destroyEngine];
+    self.curEngine = nil;
+    self.engineInitButton.enabled = TRUE;
+    self.engineUninitButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.fetchResultButton.enabled = FALSE;
+}
+
+#pragma mark - Engine Callback
+
+- (void)speechEngineNoPermission {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"No permission!"];
+        self.engineInitButton.enabled = TRUE;
+        self.engineUninitButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineInitOk {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.statusTextView setText:@"Ready"];
+        [self.resultTextView setText:[NSString stringWithFormat:@"DeviceID: %@", self.deviceID]];
+        self.engineUninitButton.enabled = TRUE;
+        self.engineInitButton.enabled = FALSE;
+        self.startEngineButton.enabled = TRUE;
+        self.fetchResultButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineInitFailed {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"Failed to init engine!"];
+        self.engineInitButton.enabled = TRUE;
+        self.engineUninitButton.enabled = FALSE;
+    });
+}
+
+- (void)setResultText:(NSString *)result {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[result stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+    });
+}
+
+#pragma mark - Helper
+
+- (long)timeDelayFrom:(long)pastTimestamp {
+    return [[NSDate date] timeIntervalSince1970] * 1000 - pastTimestamp;
+}
+
+- (NSString* )getEngineName {
+    SettingOptions* engineNameOptions = [self.settings getOptions:SETTING_MUSIC_ENGINE_NAME];
+    switch (engineNameOptions.chooseIdx) {
+        case 1:
+            return SE_COVERSONG_ENGINE;
+        case 2:
+            return SE_HUMMING_ENGINE;
+        case 0:
+        default:
+            return SE_AFP_ENGINE;
+    }
+}
+
+- (SEResultType)getResultType {
+    NSString* engineName = [self getEngineName];
+    int resultTypeIdx = [self.settings getOptions:SETTING_AFP_RESULT_TYPE].chooseIdx;
+
+    // AFP
+    if ([engineName isEqualToString:SE_AFP_ENGINE]) {
+        switch (resultTypeIdx) {
+            case 0:
+                return SEAfpResult;
+            case 1:
+            default:
+                return SEAfpSliceResult;
+        }
+    }
+    // CoverSong
+    if ([engineName isEqualToString:SE_COVERSONG_ENGINE]) {
+        switch (resultTypeIdx) {
+            case 0:
+                return SECoversongResult;
+            case 1:
+            default:
+                return SECoverSongSliceResult;
+        }
+    }
+    // Humming
+    if ([engineName isEqualToString:SE_HUMMING_ENGINE]) {
+        switch (resultTypeIdx) {
+            case 0:
+                return SEHummingResult;
+            case 1:
+            default:
+                return SEHummingSliceResult;
+        }
+    }
+
+    // Return afp result as default.
+    return SEAfpResult;
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_AFP forKey:@"viewId"];
+}
+
+@end
+
+

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/AsrOfflineViewController.h

@@ -0,0 +1,13 @@
+//
+//  AsrOfflineViewController.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/8.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface AsrOfflineViewController : UIViewController
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/AsrOfflineViewController.m

@@ -0,0 +1,507 @@
+//
+//  AsrOfflineViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/8.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import "AsrOfflineViewController.h"
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SensitiveDefines.h"
+
+@interface AsrOfflineViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *engineInitButton;
+@property (weak, nonatomic) IBOutlet UIButton *engineUninitButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *longPressButton;
+
+@property (strong, nonatomic) SpeechEngine *curEngine;
+@property (assign, nonatomic) BOOL engineStarted;
+
+@property (nonatomic, strong) NSString *deviceID;
+@property (nonatomic, assign) long talkingFinisheTimestamp;
+@property (nonatomic, assign) long startEngineTimestamp;
+@property (strong, nonatomic) NSString *debugPath;
+
+@property (weak, nonatomic) StreamRecorder *streamRecorder;
+
+// settings
+@property (strong, nonatomic) Settings *settings;
+
+@end
+
+static NSString *SLARDAR_ASR_SERVICE_NAME = @"asr_statistics";
+static NSString *SLARDAR_ASR_EVENT_RESPONSE_DELAY = @"asr_response_delay";
+
+@implementation AsrOfflineViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_ASR_OFFLINE];
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"当前调试路径 %@", self.debugPath);
+    
+    self.engineInitButton.enabled = TRUE;
+    self.engineUninitButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.longPressButton.enabled = FALSE;
+    [self.statusTextView setText:@"Waiting for init."];
+    [self decorateTextView:self.resultTextView];
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    UILongPressGestureRecognizer *longPgr = [[UILongPressGestureRecognizer alloc] initWithTarget:self
+                                                                                          action:@selector(longPressTriggered:)];
+    longPgr.minimumPressDuration = 0.5;
+    [self.longPressButton addGestureRecognizer:longPgr];
+    self.streamRecorder = [ViewController getStreamRecorder];
+    self.engineStarted = FALSE;
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self uninitEngine];
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+#pragma mark - SpeechEngineDelegate
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    switch (type) {
+        case SEEngineStart:
+            [self speechEngineStarted];
+            break;
+        case SEEngineStop:
+            [self speechEngineStopped];
+            break;
+        case SEEngineError:
+            [self speechEngineError:data];
+            break;
+        case SEAsrPartialResult:
+            [self speechEngineResult:data isFinal:FALSE];
+            break;
+        case SEFinalResult:
+            [self speechEngineResult:data isFinal:TRUE];
+            break;
+        case SEVolumeLevel:
+            NSLog(@"volume level: %s", (char*)data.bytes);
+            break;
+        case SEEngineLog:
+            NSLog(@"engine log: %s", (char*)data.bytes);
+            break;
+        default:
+            break;
+    }
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)initEngine:(id)sender {
+    [self initEngine];
+}
+
+- (IBAction)uninitEngine:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self uninitEngine];
+    [self.resultTextView setTextColor:UIColor.grayColor];
+    [self.resultTextView setText:@"点击或按住说话后，展示语音识别结果"];
+}
+
+- (IBAction)startEngine:(id)sender {
+    NSLog(@"Start engine.");
+    [self.curEngine setStringParam:[self.settings getString:SETTING_APPID] forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_ENABLE_ITN] forKey:SE_PARAMS_KEY_ASR_ENABLE_ITN_BOOL];
+    [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ASR_AUTO_STOP_BOOL];
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_VAD_MAX_SPEECH_DURATION] forKey:SE_PARAMS_KEY_VAD_MAX_SPEECH_DURATION_INT];
+    //【可选配置】控制识别结果返回的形式，全量返回或增量返回，默认为全量
+    [self.curEngine setStringParam:[self.settings getOptionsValue:SETTING_ASR_RESULT_TYPE] forKey:SE_PARAMS_KEY_ASR_RESULT_TYPE_STRING];
+
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        [self.curEngine setIntParam:[self.streamRecorder getSampleRate] forKey:SE_PARAMS_KEY_CUSTOM_SAMPLE_RATE_INT];
+        [self.curEngine setIntParam:[self.streamRecorder getChannel] forKey:SE_PARAMS_KEY_CUSTOM_CHANNEL_INT];
+        if (![self.streamRecorder start]) {
+            [self speechEngineNoPermission];
+            return;
+        }
+    } else if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_FILE]) {
+        NSString* file_path = [NSString stringWithFormat:@"%@/%@", self.debugPath, @"asr_rec_file.pcm"];
+        NSLog(@"test file path: %@", file_path);
+        [self.curEngine setStringParam:file_path forKey:SE_PARAMS_KEY_RECORDER_FILE_STRING];
+    }
+    [self.curEngine sendDirective:SEDirectiveSyncStopEngine];
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+    if (ret == SERecCheckEnvironmentFailed) {
+        [self speechEngineNoPermission];
+    }
+}
+
+- (IBAction)stopEngine:(id)sender {
+    NSLog(@"Stop engine.");
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+}
+
+- (void)longPressTriggered:(UILongPressGestureRecognizer *)longPgr {
+    if (longPgr.state == UIGestureRecognizerStateBegan) {
+        NSLog(@"Long press begin.");
+        
+        [self setResultText:@""];
+        [self.curEngine setStringParam:[self.settings getString:SETTING_APPID] forKey:SE_PARAMS_KEY_APP_ID_STRING];
+        [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_ENABLE_ITN] forKey:SE_PARAMS_KEY_ASR_ENABLE_ITN_BOOL];
+        [self.curEngine setBoolParam:FALSE forKey:SE_PARAMS_KEY_ASR_AUTO_STOP_BOOL];
+        [self.curEngine setIntParam:[self.settings getInt:SETTING_VAD_MAX_SPEECH_DURATION] forKey:SE_PARAMS_KEY_VAD_MAX_SPEECH_DURATION_INT];
+        
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.curEngine setIntParam:[self.streamRecorder getSampleRate] forKey:SE_PARAMS_KEY_CUSTOM_SAMPLE_RATE_INT];
+            [self.curEngine setIntParam:[self.streamRecorder getChannel] forKey:SE_PARAMS_KEY_CUSTOM_CHANNEL_INT];
+            if (![self.streamRecorder start]) {
+                [self speechEngineNoPermission];
+                return;
+            }
+        } else if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_FILE]) {
+            NSString* file_path = [NSString stringWithFormat:@"%@/%@", self.debugPath, @"asr_rec_file.pcm"];
+            NSLog(@"test file path: %@", file_path);
+            [self.curEngine setStringParam:file_path forKey:SE_PARAMS_KEY_RECORDER_FILE_STRING];
+        }
+        
+        [self.curEngine sendDirective:SEDirectiveSyncStopEngine];
+        SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+        if (ret == SERecCheckEnvironmentFailed) {
+            [self speechEngineNoPermission];
+        }
+    } else if (longPgr.state == UIGestureRecognizerStateEnded) {
+        NSLog(@"Long press ended.");
+        self.talkingFinisheTimestamp = [[NSDate date] timeIntervalSince1970] * 1000;
+        [self.curEngine sendDirective:SEDirectiveFinishTalking];
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.streamRecorder stop];
+        }
+    }
+}
+
+#pragma mark - Init Methods
+
+- (void)initEngine {
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    if (appDelegate.deviceID.length < 1) {
+        self.engineInitButton.enabled = FALSE;
+        dispatch_async(dispatch_get_main_queue(), ^{
+            [self.statusTextView setText:@"Waiting for get deviceID."];
+            sleep(1);
+            [self initEngine];
+        });
+        return;
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+
+    if (![self.settings getBool:SETTING_ASR_ENABLE_RESOURCE_DOWNLOAD]) {
+        [self initEngineInternal];
+    } else {
+        SpeechResourceManager *resourceManager = [SpeechResourceManager shareInstance];
+        if ([resourceManager checkModelExist:[self getAsrModelName]]) {
+            [resourceManager checkModelVersion:[self getAsrModelName] completion:^(SEResourceStatus status, BOOL needUpdate, NSData *data) {
+                if (status == kSERSuccess) {
+                    if (needUpdate) {
+                        [self fetchAsrResource];
+                    } else {
+                        [self initEngineInternal];
+                    }
+                } else {
+                    NSLog(@"Model check failed: %@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);
+                    [self.resultTextView setText:@"Failed to check asr resource"];
+                    [self speechEngineInitFailed];
+                }
+            }];
+        } else {
+            [self fetchAsrResource];
+        }
+    }
+}
+
+- (void)fetchAsrResource {
+    SpeechResourceManager *resourceManager = [SpeechResourceManager shareInstance];
+    
+    [resourceManager fetchModelByName:[self getAsrModelName] completion:^(SEResourceStatus status, NSData* data) {
+        if (status == kSERSuccess) {
+            [self initEngineInternal];
+        } else {
+            [self.resultTextView setText:@"Failed to fetch asr resource"];
+            [self speechEngineInitFailed];
+        }
+    }];
+}
+
+- (void)initEngineInternal {
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+    }
+    if (![self.curEngine createEngineWithDelegate:self]) {
+        NSLog(@"Create speech engine failed.");
+        return;
+    }
+
+    [self.resultTextView setTextColor:UIColor.blackColor];
+    NSLog(@"Engine version: %@", [self.curEngine getVersion]);
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"Debug path: %@", self.debugPath);
+    NSString* modelsPath = [NSString stringWithFormat:@"%@/models", self.debugPath];
+    if ([self.settings getBool:SETTING_ASR_ENABLE_RESOURCE_DOWNLOAD]) {
+        SpeechResourceManager *resourceManager = [SpeechResourceManager shareInstance];
+        modelsPath = [resourceManager getModelPath:[self getAsrModelName]];
+    }
+    NSLog(@"Asr model path: %@", modelsPath);
+
+    //【必需配置】离线合成鉴权相关：证书文件存放路径
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_LICENSE_DIRECTORY_STRING];
+    NSString* authenticationType = [self getAuthenticationType];
+    //【必需配置】Authenticate Type
+    [self.curEngine setStringParam:authenticationType forKey:SE_PARAMS_KEY_AUTHENTICATE_TYPE_STRING];
+    if ([authenticationType isEqualToString:SE_AUTHENTICATE_TYPE_PRE_BIND]) {
+        // 按包名授权，获取到授权的 APP 可以不限次数、不限设备数的使用离线合成
+        NSString *licenseName = [self.settings getString:SETTING_LICENSE_NAME];
+        NSString *licenseBusiId = [self.settings getString:SETTING_LICENSE_BUSI_ID];
+        // 证书名和业务 ID, 离线合成鉴权相关，使用火山提供的证书下发服务时为【必需配置】, 否则为【无需配置】
+        // 证书名，用于下载按报名授权的证书文件
+        [self.curEngine setStringParam:licenseName forKey:SE_PARAMS_KEY_LICENSE_NAME_STRING];
+        // 业务 ID, 用于下载按报名授权的证书文件
+        [self.curEngine setStringParam:licenseBusiId forKey:SE_PARAMS_KEY_LICENSE_BUSI_ID_STRING];
+    } else if ([authenticationType isEqualToString:SE_AUTHENTICATE_TYPE_LATE_BIND]) {
+        // 按装机量授权，不限制 APP 的包名和使用次数，但是限制使用离线合成的设备数量
+        //【必需配置】离线合成鉴权相关：Authenticate Address
+        [self.curEngine setStringParam:SDEF_AUTHENTICATE_ADDRESS forKey:SE_PARAMS_KEY_AUTHENTICATE_ADDRESS_STRING];
+        //【必需配置】离线合成鉴权相关：Authenticate Uri
+        [self.curEngine setStringParam:SDEF_AUTHENTICATE_URI forKey:SE_PARAMS_KEY_AUTHENTICATE_URI_STRING];
+        NSString* curBusinessKey = [self.settings getString:SETTING_BUSINESS_KEY];
+        NSString* curAuthenticateSecret = [self.settings getString:SETTING_AUTHENTICATE_SECRET];
+        //【必需配置】离线合成鉴权相关：Business Key
+        [self.curEngine setStringParam:curBusinessKey forKey:SE_PARAMS_KEY_BUSINESS_KEY_STRING];
+        //【必需配置】离线合成鉴权相关：Authenticate Secret
+        [self.curEngine setStringParam:curAuthenticateSecret forKey:SE_PARAMS_KEY_AUTHENTICATE_SECRET_STRING];
+    }
+
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.curEngine setStringParam:SE_LOG_LEVEL_TRACE forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+    [self.curEngine setStringParam:[self.settings getString:SETTING_APPID] forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    [self.curEngine setStringParam:@"388808087185088" forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setIntParam:1 forKey:SE_PARAMS_KEY_CHANNEL_NUM_INT];
+    [self.curEngine setStringParam:@"" forKey:SE_PARAMS_KEY_ASR_REC_PATH_STRING];
+    if ([self.settings getBool:SETTING_ASR_RECORDER_SAVE]) {
+        [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_ASR_REC_PATH_STRING];
+    }
+    [self.curEngine setStringParam:[self getRecorderType] forKey:SE_PARAMS_KEY_RECORDER_TYPE_STRING];
+    [self.curEngine setStringParam:SE_ASR_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+    [self.curEngine setIntParam:16000 forKey:SE_PARAMS_KEY_SAMPLE_RATE_INT];
+    [self.curEngine setBoolParam:true forKey:SE_PARAMS_KEY_ASR_SHOW_UTTER_BOOL];
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_SHOW_LANGUAGE] forKey:SE_PARAMS_KEY_ASR_SHOW_LANG_BOOL];
+    [self.curEngine setBoolParam:true forKey:SE_PARAMS_KEY_ASR_SHOW_VOLUME_BOOL];
+    [self.curEngine setIntParam:SEAsrWorkModeOfflineFlute forKey:SE_PARAMS_KEY_ASR_WORK_MODE_INT];
+    [self.curEngine setStringParam:modelsPath forKey:SE_PARAMS_KEY_ASR_OFF_RESOURCE_PATH_STRING];
+    
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        if ([self.streamRecorder getSampleRate] != 16000 || [self.streamRecorder getChannel] != 1) {
+            [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ENABLE_RESAMPLER_BOOL];
+        }
+    }
+    
+    SEEngineErrorCode ret = [self.curEngine initEngine];
+    if (ret != SENoError) {
+        NSLog(@"Init Engine failed: %d", ret);
+    }
+    if (ret == SENoError) {
+        [self speechEngineInitOk];
+    } else {
+        [self.resultTextView setText:[NSString stringWithFormat:@"Failed to init engine: %d", ret]];
+        [self speechEngineInitFailed];
+    }
+}
+
+- (NSString *)getRecorderType {
+    SettingOptions* recorderTypeOptions = [self.settings getOptions:SETTING_RECORD_TYPE];
+    switch (recorderTypeOptions.chooseIdx) {
+        case 0:
+            return SE_RECORDER_TYPE_RECORDER;
+        case 1:
+            return SE_RECORDER_TYPE_FILE;
+        case 2:
+            return SE_RECORDER_TYPE_STREAM;
+        default:
+            break;
+    }
+    return @"";
+}
+
+- (void)uninitEngine {
+    if (self.curEngine != nil) {
+        NSLog(@"引擎析构");
+        [self.curEngine destroyEngine];
+        self.curEngine = nil;
+        NSLog(@"引擎析构完成");
+    }
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.engineInitButton.enabled = TRUE;
+        self.engineUninitButton.enabled = FALSE;
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = FALSE;
+        self.longPressButton.enabled = FALSE;
+    });
+}
+
+- (void)setHotWords:(NSString*) hotWords {
+    [self.curEngine sendDirective:SEDirectiveUpdateAsrHotWords data: hotWords];
+}
+
+#pragma mark - Engine Callback
+
+- (void)speechEngineNoPermission {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"No permission!"];
+        self.engineInitButton.enabled = TRUE;
+        self.engineUninitButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineInitOk {
+    [self.streamRecorder setSpeechEngine:VIEW_ASR_OFFLINE engine:self.curEngine];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.statusTextView setText:@"Ready"];
+        [self.resultTextView setText:[NSString stringWithFormat:@"DeviceID: %@", self.deviceID]];
+        self.engineUninitButton.enabled = TRUE;
+        self.engineInitButton.enabled = FALSE;
+        self.startEngineButton.enabled = TRUE;
+        self.longPressButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineInitFailed {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"Failed to init engine!"];
+        self.engineInitButton.enabled = TRUE;
+        self.engineUninitButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineStarted {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.startEngineTimestamp = [[NSDate date] timeIntervalSince1970] * 1000;
+        self.engineStarted = true;
+        [self.statusTextView setText:@"Engine Started!"];
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = TRUE;
+        self.longPressButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineStopped {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.streamRecorder stop];
+        }
+        self.engineStarted = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+        self.startEngineButton.enabled = TRUE;
+        self.stopEngineButton.enabled = FALSE;
+        self.longPressButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineResult:(NSData *)data isFinal:(BOOL)isFinal {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        long response_delay = 0;
+        if (isFinal && self.talkingFinisheTimestamp > 0) {
+            response_delay = [self timeDelayFrom:self.talkingFinisheTimestamp];
+            self.talkingFinisheTimestamp = 0;
+        }
+        
+        NSString* dataStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
+        NSMutableString *text = [[NSMutableString alloc] initWithString:@""];
+        [text appendFormat:@"result: %@", dataStr];
+        if (isFinal) {
+            [text appendFormat:@"\nresponse_delay: %ld", response_delay];
+        }
+        if (text.length) {
+            [self.resultTextView setText:[text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+        }
+    });
+}
+
+- (void)speechEngineError:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]];
+//        [self stopEngine:nil];
+    });
+}
+
+- (void)setResultText:(NSString *)result {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[result stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+    });
+}
+
+- (NSString*)getAsrModelName {
+    return [self.settings getString:SETTING_ASR_MODEL_NAME];
+}
+
+#pragma mark - Helper
+
+- (NSString*)getAuthenticationType {
+    switch ([self.settings getOptions:SETTING_AUTHENTICATION_TYPE].chooseIdx) {
+        case 0:
+            return SE_AUTHENTICATE_TYPE_PRE_BIND;
+        case 1:
+            return SE_AUTHENTICATE_TYPE_LATE_BIND;
+        default:
+            break;
+    }
+    return SE_AUTHENTICATE_TYPE_PRE_BIND;
+}
+
+- (long)timeDelayFrom:(long)pastTimestamp {
+    return [[NSDate date] timeIntervalSince1970] * 1000 - pastTimestamp;
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_ASR_OFFLINE forKey:@"viewId"];
+}
+
+@end
+

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/AsrViewController.h

@@ -0,0 +1,13 @@
+//
+//  AsrViewController.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/8.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface AsrViewController : UIViewController
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/AsrViewController.m

@@ -0,0 +1,563 @@
+//
+//  AsrViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/8.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import "AsrViewController.h"
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SensitiveDefines.h"
+
+@interface AsrViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+// UI
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *initialEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *uninitialEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *recordButton;
+
+// Device ID: 用于定位线上问题
+@property (nonatomic, strong) NSString *deviceID;
+// Debug Path: 用于存放一些 SDK 相关的文件，比如模型、日志等
+@property (strong, nonatomic) NSString *debugPath;
+
+// SpeechEngine
+@property (strong, nonatomic) SpeechEngine *curEngine;
+@property (assign, nonatomic) BOOL engineStarted;
+
+// Settings
+@property (strong, nonatomic) Settings *settings;
+
+// APP 层自定义的录音机，在音频来源为 Stream 时使用
+@property (weak, nonatomic) StreamRecorder *streamRecorder;
+
+// 一些用于统计的字段
+@property (nonatomic, assign) long talkingFinishTimestamp;
+@end
+
+@implementation AsrViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    self.initialEngineButton.enabled = TRUE;
+    self.uninitialEngineButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.recordButton.enabled = FALSE;
+    
+    [self.statusTextView setText:@"Waiting for init."];
+    [self decorateTextView:self.resultTextView];
+    
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    UILongPressGestureRecognizer *longPgr = [[UILongPressGestureRecognizer alloc] initWithTarget:self
+                                                                                          action:@selector(recordTriggered:)];
+    longPgr.minimumPressDuration = 0.5;
+    [self.recordButton addGestureRecognizer:longPgr];
+    
+    self.streamRecorder = [ViewController getStreamRecorder];
+    self.engineStarted = FALSE;
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_ASR];
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"当前调试路径 %@", self.debugPath);
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self uninitEngine];
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+#pragma mark - Config & Init & Uninit Methods
+
+-(void)configInitParams{
+    //【必需配置】Engine Name
+    [self.curEngine setStringParam:SE_ASR_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+    
+    //【可选配置】Debug & Log
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.curEngine setStringParam:SE_LOG_LEVEL_DEBUG forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+
+    //【可选配置】UID & deviceID: 用于定位线上问题
+    [self.curEngine setStringParam:SDEF_UID forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setStringParam:self.deviceID forKey:SE_PARAMS_KEY_DEVICE_ID_STRING];
+    
+    //【必需配置】配置音频来源
+    [self.curEngine setStringParam:[self getRecorderType] forKey:SE_PARAMS_KEY_RECORDER_TYPE_STRING];
+
+    if ([self.settings getBool:SETTING_ASR_RECORDER_SAVE]) {
+        //【可选配置】录音文件保存路径，如配置，SDK会将录音保存到该路径下，文件格式为 .wav
+        [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_ASR_REC_PATH_STRING];
+    }
+    
+    // 当音频来源为 RECORDER_TYPE_STREAM 时，如输入音频采样率不等于 16K，需添加如下配置
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        if ([self.streamRecorder getSampleRate] != 16000 || [self.streamRecorder getChannel] != 1) {
+            // 当音频来源为 RECORDER_TYPE_STREAM 时【必需配置】，否则【无需配置】
+            // 启用 SDK 内部的重采样
+            [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ENABLE_RESAMPLER_BOOL];
+            // 将重采样所需的输入采样率设置为 APP 层输入的音频的实际采样率
+            [self.curEngine setIntParam:[self.streamRecorder getSampleRate] forKey:SE_PARAMS_KEY_CUSTOM_SAMPLE_RATE_INT];
+            [self.curEngine setIntParam:[self.streamRecorder getChannel] forKey:SE_PARAMS_KEY_CUSTOM_CHANNEL_INT];
+        }
+    }
+    
+    NSString *address = [self.settings getString:SETTING_ADDRESS];
+    if (!address.length) {
+        address = SDEF_DEFAULT_ADDRESS;
+    }
+    NSLog(@"Current address: %@", address);
+    //【必需配置】识别服务域名
+    [self.curEngine setStringParam:address forKey:SE_PARAMS_KEY_ASR_ADDRESS_STRING];
+    
+    NSString *uri = [self.settings getString:SETTING_URI];
+    if (!uri.length) {
+        uri = SDEF_ASR_DEFAULT_URI;
+    }
+    NSLog(@"Current uri: %@", uri);
+    //【必需配置】识别服务Uri
+    [self.curEngine setStringParam:uri forKey:SE_PARAMS_KEY_ASR_URI_STRING];
+    
+    NSString* appID = [self.settings getString:SETTING_APPID];
+    //【必需配置】鉴权相关：Appid
+    [self.curEngine setStringParam:appID.length <= 0 ? SDEF_APPID : appID forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    //【必需配置】鉴权相关：Token
+    NSString* token = [self.settings getString:SETTING_TOKEN];
+    [self.curEngine setStringParam:token forKey:SE_PARAMS_KEY_APP_TOKEN_STRING];
+    //【可需配置】自定义请求头部KV：Headers
+    [self.curEngine setStringParam:[self.settings getString:SETTING_REQUEST_HEADERS] forKey:SE_PARAMS_KEY_REQUEST_HEADERS_STRING];
+
+    NSString* cluster = [self.settings getString:SETTING_CLUSTER];
+    NSLog(@"Current cluster: %@", cluster);
+    //【必需配置】识别服务所用集群
+    [self.curEngine setStringParam:cluster.length <= 0 ? SDEF_ASR_DEFAULT_CLUSTER : cluster forKey:SE_PARAMS_KEY_ASR_CLUSTER_STRING];
+    
+    //【可选配置】在线请求的建连与接收超时，一般不需配置使用默认值即可
+    [self.curEngine setIntParam:3000 forKey:SE_PARAMS_KEY_ASR_CONN_TIMEOUT_INT];
+    [self.curEngine setIntParam:5000 forKey:SE_PARAMS_KEY_ASR_RECV_TIMEOUT_INT];
+    
+    //【可选配置】在线请求断连后，重连次数，默认值为0，如果需要开启需要设置大于0的次数
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_ASR_MAX_RETRY_TIMES] forKey:SE_PARAMS_KEY_ASR_MAX_RETRY_TIMES_INT];
+    
+    //【可选配置】音频采样率，默认16000
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_SAMPLE_RATE] forKey:SE_PARAMS_KEY_SAMPLE_RATE_INT];
+    //【可选配置】音频通道数，默认1，可选1或2
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_CHANNEL] forKey:SE_PARAMS_KEY_CHANNEL_NUM_INT];
+    //【可选配置】上传给服务的音频通道数，默认1，可选1或2，一般与SE_PARAMS_KEY_SAMPLE_RATE_INT保持一致即可
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_CHANNEL] forKey:SE_PARAMS_KEY_UP_CHANNEL_NUM_INT];
+
+}
+
+-(void)configStartAsrParams{
+    //【可选配置】是否开启顺滑(DDC)
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_ENABLE_DDC] forKey:SE_PARAMS_KEY_ASR_ENABLE_DDC_BOOL];
+    //【可选配置】是否开启文字转数字(ITN)
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_ENABLE_ITN] forKey:SE_PARAMS_KEY_ASR_ENABLE_ITN_BOOL];
+    //【可选配置】是否开启标点
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_ENABLE_NLU_PUNC] forKey:SE_PARAMS_KEY_ASR_SHOW_NLU_PUNC_BOOL];
+    //【可选配置】是否隐藏句尾标点
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_DISABLE_END_PUNC] forKey:SE_PARAMS_KEY_ASR_DISABLE_END_PUNC_BOOL];
+    // 【可选配置】直接传递自定义的ASR请求JSON，若使用此参数需自行确保JSON格式正确
+    [self.curEngine setStringParam:[self.settings getString:SETTING_ASR_REQ_PARAMS] forKey:SE_PARAMS_KEY_ASR_REQ_PARAMS_STRING];
+
+    //【可选配置】设置识别语种
+    [self.curEngine setStringParam:[self.settings getString:SETTING_ASR_LANGUAGE] forKey:SE_PARAMS_KEY_ASR_LANGUAGE_STRING];
+    //【可选配置】是否返回用户说话的语种
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_SHOW_LANGUAGE] forKey:SE_PARAMS_KEY_ASR_SHOW_LANG_BOOL];
+
+    //【可选配置】控制识别结果返回的形式，全量返回或增量返回，默认为全量
+    [self.curEngine setStringParam:[self.settings getOptionsValue:SETTING_ASR_RESULT_TYPE] forKey:SE_PARAMS_KEY_ASR_RESULT_TYPE_STRING];
+
+    //【可选配置】设置VAD头部静音时长，用户多久没说话视为空音频，即静音检测时长
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_ASR_VAD_START_SILENCE_TIME] forKey:SE_PARAMS_KEY_ASR_VAD_START_SILENCE_TIME_INT];
+    //【可选配置】设置VAD尾部静音时长，用户说话后停顿多久视为说话结束，即自动判停时长
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_ASR_VAD_END_SILENCE_TIME] forKey:SE_PARAMS_KEY_ASR_VAD_END_SILENCE_TIME_INT];
+    //【可选配置】用户音频输入最大时长，仅一句话识别场景生效，单位毫秒，默认为 150000ms.
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_VAD_MAX_SPEECH_DURATION] forKey:SE_PARAMS_KEY_VAD_MAX_SPEECH_DURATION_INT];
+    
+    //【可选配置】控制是否返回录音音量，在 APP 需要显示音频波形时可以启用
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_GET_VOLUME] forKey:SE_PARAMS_KEY_ENABLE_GET_VOLUME_BOOL];
+    
+    //【可选配置】更新 ASR 热词
+    if ([self.settings getString:SETTING_ASR_HOTWORDS].length != 0) {
+        [self setHotWords:[self.settings getString:SETTING_ASR_HOTWORDS]];
+    }
+    
+    //【可选配置】设置纠错词表，识别结果会根据设置的纠错词纠正结果，例如："{\"古爱玲\":\"谷爱凌\"}"，当识别结果中出现"古爱玲"时会替换为"谷爱凌"
+    [self.curEngine setStringParam:[self.settings getString:SETTING_ASR_CORRECTWORDS] forKey:SE_PARAMS_KEY_ASR_CORRECT_WORDS_STRING];
+    
+    NSString* recorderType = [self getRecorderType];
+    NSLog(@"录音模式: %@", recorderType);
+    
+    if ([recorderType isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        if (![self.streamRecorder start]) {
+            [self speechEngineNoPermission];
+        }
+    } else if ([recorderType isEqualToString:SE_RECORDER_TYPE_FILE]) {
+        // 使用音频文件识别时，需要设置文件的绝对路径
+        NSString* file_path = [NSString stringWithFormat:@"%@/%@", self.debugPath, @"asr_rec_file.pcm"];
+        NSLog(@"输入的音频文件路径: %@", file_path);
+        // 使用音频文件识别时【必须配置】，否则【无需配置】
+        [self.curEngine setStringParam:file_path forKey:SE_PARAMS_KEY_RECORDER_FILE_STRING];
+    }
+}
+
+- (void)setHotWords:(NSString*) hotWords {
+    // 更新 ASR 热词，例如："{\"hotwords\":[{\"word\":\"过秦论\",\"scale\":2.0}]}"
+    // scale为float类型参数，其中叠词的范围为[1.0,2.0]，非叠词的范围为[1.0,50.0]，scale值越大，结果中出现热词的概率越大
+    [self.curEngine sendDirective:SEDirectiveUpdateAsrHotWords data: hotWords];
+}
+
+- (void)initEngine {
+    NSLog(@"获取设备ID，调试使用");
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+    NSLog(@"获取设备ID成功: %@", self.deviceID);
+    
+    
+    NSLog(@"创建引擎");
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+        if (![self.curEngine createEngineWithDelegate:self]) {
+            NSLog(@"引擎创建失败.");
+            return;
+        }
+    }
+    [self.resultTextView setTextColor:UIColor.blackColor];
+    NSLog(@"SDK 版本号: %@", [self.curEngine getVersion]);
+    
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"当前调试路径: %@", self.debugPath);
+    
+    NSLog(@"配置初始化参数");
+    [self configInitParams];
+
+    
+    NSLog(@"引擎初始化");
+    SEEngineErrorCode ret = [self.curEngine initEngine];
+    if (ret == SENoError) {
+        NSLog(@"初始化成功");
+        [self speechEngineInitSucceeded];
+    } else {
+        NSLog(@"初始化失败，返回值: %d", ret);
+        [self speechEngineInitFailed:ret];
+    }
+}
+
+- (void)uninitEngine {
+    if (self.curEngine != nil) {
+        NSLog(@"引擎析构");
+        [self.curEngine destroyEngine];
+        self.curEngine = nil;
+        NSLog(@"引擎析构完成");
+    }
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.initialEngineButton.enabled = TRUE;
+        self.uninitialEngineButton.enabled = FALSE;
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = FALSE;
+        self.recordButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineInitSucceeded {
+    [self.streamRecorder setSpeechEngine:VIEW_ASR engine:self.curEngine];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.statusTextView setText:@"Ready"];
+        [self setResultText:[NSString stringWithFormat:@"DeviceID: %@", self.deviceID]];
+        self.uninitialEngineButton.enabled = TRUE;
+        self.initialEngineButton.enabled = FALSE;
+        self.startEngineButton.enabled = TRUE;
+        self.recordButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineInitFailed:(int)initStatus {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:[[NSString alloc] initWithFormat:@"Failed to init engine, %d!", initStatus]];
+        self.initialEngineButton.enabled = TRUE;
+        self.uninitialEngineButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineNoPermission {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"No permission!"];
+        self.initialEngineButton.enabled = TRUE;
+        self.uninitialEngineButton.enabled = FALSE;
+    });
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)initEngineBtnClicked:(id)sender {
+    [self initEngine];
+}
+
+- (IBAction)uninitEngineBtnClicked:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self uninitEngine];
+    
+    [self.resultTextView setTextColor:UIColor.grayColor];
+    [self setResultText:@"点击或按住说话后，展示语音识别结果"];
+}
+
+- (IBAction)startEngineBtnClicked:(id)sender {
+    self.talkingFinishTimestamp = 0;
+    [self setResultText:@""];
+    
+    NSLog(@"配置启动参数");
+    [self configStartAsrParams];
+
+    //【可选配置】该按钮为短按模式，预期是按下开始录音，自动判停结束，需要开启云端自动判停功能。
+    NSLog(@"开启 ASR 云端自动判停");
+    [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ASR_AUTO_STOP_BOOL];
+
+    
+    // Directive：启动引擎前调用SYNC_STOP指令，保证前一次请求结束。
+    NSLog(@"Directive: SEDirectiveSyncStopEngine");
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveSyncStopEngine];
+    if (ret != SENoError) {
+        NSLog(@"Send directive syncstop failed: %d", ret);
+    } else {
+        NSLog(@"启用引擎.");
+        NSLog(@"Directive: SEDirectiveStartEngine");
+        SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+        if (ret == SERecCheckEnvironmentFailed) {
+            [self speechEngineNoPermission];
+        }
+    }
+}
+
+- (IBAction)stopEngineBtnClicked:(id)sender {
+    NSLog(@"关闭引擎");
+    NSLog(@"Directive: SEDirectiveStopEngine");
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+}
+
+- (void)recordTriggered:(UILongPressGestureRecognizer *)longPgr {
+    if (longPgr.state == UIGestureRecognizerStateBegan) {
+        self.talkingFinishTimestamp = 0;
+        [self setResultText:@""];
+        
+        NSLog(@"配置启动参数");
+        [self configStartAsrParams];
+
+        //【可选配置】是否启用云端自动判停，仅一句话识别场景生效
+        NSLog(@"关闭 ASR 云端自动判停");
+        [self.curEngine setBoolParam:FALSE forKey:SE_PARAMS_KEY_ASR_AUTO_STOP_BOOL];
+
+
+        // Directive：启动引擎前调用SYNC_STOP指令，保证前一次请求结束。
+        NSLog(@"Directive: SEDirectiveSyncStopEngine");
+        SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveSyncStopEngine];
+        if (ret != SENoError) {
+            NSLog(@"Send directive syncstop failed: %d", ret);
+        } else {
+            // Directive：启动引擎指令。
+            NSLog(@"Directive: SEDirectiveStartEngine");
+            SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+            if (ret == SERecCheckEnvironmentFailed) {
+                [self speechEngineNoPermission];
+            }
+        }
+    } else if (longPgr.state == UIGestureRecognizerStateEnded) {
+        self.talkingFinishTimestamp = [[NSDate date] timeIntervalSince1970] * 1000;
+        // Directive：结束音频输入。
+        NSLog(@"Directive: SEDirectiveFinishTalking");
+        [self.curEngine sendDirective:SEDirectiveFinishTalking];
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.streamRecorder stop];
+        }
+    }
+}
+
+#pragma mark - Message Callback
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    switch (type) {
+        case SEEngineStart:
+            // Callback: 引擎启动成功回调
+            NSLog(@"Callback: 引擎启动成功");
+            [self speechEngineStarted];
+            break;
+        case SEEngineStop:
+            // Callback: 引擎关闭回调
+            NSLog(@"Callback: 引擎关闭");
+            [self speechEngineStopped];
+            break;
+        case SEEngineError:
+            // Callback: 错误信息回调
+            NSLog(@"Callback: 错误信息: %@", data);
+            [self speechEngineError:data];
+            break;
+        case SEConnectionConnected:
+            NSLog(@"Callback: 建连成功");
+            break;
+        case SEAsrPartialResult:
+            // Callback: ASR 当前请求的部分结果回调
+            NSLog(@"Callback: ASR 当前请求的部分结果");
+            [self speechEngineResult:data isFinal:FALSE];
+            break;
+        case SEFinalResult:
+            // Callback: ASR 当前请求最终结果回调
+            NSLog(@"Callback: ASR 当前请求最终结果");
+            [self speechEngineResult:data isFinal:TRUE];
+            break;
+        case SEVolumeLevel:
+            // Callback: 录音音量回调
+            NSLog(@"Callback: 录音音量，%.3f", [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] floatValue]);
+            break;
+        default:
+            break;
+    }
+}
+
+- (void)speechEngineStarted {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.engineStarted = true;
+        [self.statusTextView setText:@"Engine Started!"];
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = TRUE;
+        self.recordButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineStopped {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.streamRecorder stop];
+        }
+        self.engineStarted = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+        self.startEngineButton.enabled = TRUE;
+        self.stopEngineButton.enabled = FALSE;
+        self.recordButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineResult:(NSData *)data isFinal:(BOOL)isFinal {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        // 计算由录音结束到 ASR 最终结果之间的延迟
+        long response_delay = 0;
+        if (isFinal && self.talkingFinishTimestamp > 0) {
+            response_delay = [self timeDelayFrom:self.talkingFinishTimestamp];
+        }
+        
+        // 从回调的 json 数据中解析 ASR 结果
+        NSError *error;
+        NSDictionary *jsonResult = [NSJSONSerialization JSONObjectWithData:data
+                                                                   options:NSJSONReadingMutableContainers
+                                                                     error:&error];
+        if (![jsonResult objectForKey:@"result"]) {
+            return;
+        }
+        
+        // 在 UI 显示 ASR 结果和延迟信息
+        NSString *result = [[[jsonResult objectForKey:@"result"] firstObject] objectForKey:@"text"];
+        if (result.length == 0) {
+            return;
+        }
+        NSMutableString *text = [[NSMutableString alloc] initWithString:@""];
+        [text appendFormat:@"result: %@", result];
+        [text appendFormat:@"\nreqid: %@", [jsonResult objectForKey:@"reqid"]];
+        if (isFinal && response_delay > 0) {
+            [text appendFormat:@"\nresponse_delay: %ld", response_delay];
+        }
+        [self setResultText:[text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+    });
+}
+
+- (void)speechEngineError:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        // 从回调的 json 数据中解析错误码和错误详细信息
+        id error_json = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
+        if ([error_json isKindOfClass:[NSDictionary class]]) {
+            NSDictionary *error_info = error_json;
+            
+            // 在 UI 显示错误信息
+            if ([error_info objectForKey:@"name"] != nil) {
+                NSString* error_msg = [[error_json objectForKey:@"err_msg"] stringValue];
+                NSString* reqid = [[error_json objectForKey:@"reqid"] stringValue];
+                [self setResultText:[NSString stringWithFormat:@"reqid: %@, error: %@", reqid, error_msg]];
+            } else {
+                [self setResultText:[NSString stringWithFormat:@"%@", error_info]];
+            }
+        }
+    });
+}
+
+#pragma mark - Helper
+
+- (NSString *)getRecorderType {
+    SettingOptions* recorderTypeOptions = [self.settings getOptions:SETTING_RECORD_TYPE];
+    switch (recorderTypeOptions.chooseIdx) {
+        case 0:
+            return SE_RECORDER_TYPE_RECORDER;
+        case 1:
+            return SE_RECORDER_TYPE_FILE;
+        case 2:
+            return SE_RECORDER_TYPE_STREAM;
+        default:
+            break;
+    }
+    return @"";
+}
+
+- (void)setResultText:(NSString *)result {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[result stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+    });
+}
+
+- (long)timeDelayFrom:(long)pastTimestamp {
+    return [[NSDate date] timeIntervalSince1970] * 1000 - pastTimestamp;
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_ASR forKey:@"viewId"];
+}
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/Assets.xcassets/vad.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "vad_60_60.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "vad_120_120.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "vad_180_180.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/AuViewController.h

@@ -0,0 +1,13 @@
+//
+//  AuViewController.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2023/5/16.
+//  Copyright © 2023 chengzihao.ds. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface AuViewController : UIViewController
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/AuViewController.m

@@ -0,0 +1,467 @@
+//
+//  AuViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2023/5/16.
+//  Copyright © 2023 chengzihao.ds. All rights reserved.
+//
+
+#import "AuViewController.h"
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SensitiveDefines.h"
+
+@interface AuViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *engineInitButton;
+@property (weak, nonatomic) IBOutlet UIButton *engineUninitButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *longPressButton;
+
+@property (strong, nonatomic) SpeechEngine *curEngine;
+@property (assign, nonatomic) BOOL engineStarted;
+
+@property (nonatomic, strong) NSString *deviceID;
+@property (nonatomic, assign) long talkingFinisheTimestamp;
+@property (nonatomic, assign) long startEngineTimestamp;
+@property (strong, nonatomic) NSString *debugPath;
+
+@property (weak, nonatomic) StreamRecorder *streamRecorder;
+
+// settings
+@property (strong, nonatomic) Settings *settings;
+
+@end
+
+static NSString *SLARDAR_AU_SERVICE_NAME = @"au_statistics";
+static NSString *SLARDAR_AU_EVENT_RESPONSE_DELAY = @"au_response_delay";
+
+@implementation AuViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_AU];
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"当前调试路径 %@", self.debugPath);
+    
+    self.engineInitButton.enabled = TRUE;
+    self.engineUninitButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.longPressButton.enabled = FALSE;
+    [self.statusTextView setText:@"Waiting for init."];
+    [self decorateTextView:self.resultTextView];
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    UILongPressGestureRecognizer *longPgr = [[UILongPressGestureRecognizer alloc] initWithTarget:self
+                                                                                          action:@selector(longPressTriggered:)];
+    longPgr.minimumPressDuration = 0.5;
+    [self.longPressButton addGestureRecognizer:longPgr];
+    self.streamRecorder = [ViewController getStreamRecorder];
+    self.engineStarted = FALSE;
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self uninitEngine];
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+- (void)configInitAuParams {
+    //【必需配置】Engine Name
+    [self.curEngine setStringParam:SE_AU_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+
+    //【可选配置】Debug & Log
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.curEngine setStringParam:SE_LOG_LEVEL_DEBUG forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+    //【可选配置】UID & deviceID: 用于定位线上问题
+    [self.curEngine setStringParam:SDEF_UID forKey:SE_PARAMS_KEY_UID_STRING];
+    //【必需配置】配置音频来源
+    [self.curEngine setStringParam:[self getRecorderType] forKey:SE_PARAMS_KEY_RECORDER_TYPE_STRING];
+    if ([self.settings getBool:SETTING_AU_RECORDER_SAVE]) {
+        //【可选配置】录音文件保存路径，如配置，SDK会将录音保存到该路径下，文件格式为 .wav
+        [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_AU_REC_PATH_STRING];
+    }
+    //【必需配置】鉴权相关：Appid
+    [self.curEngine setStringParam:[self.settings getString:SETTING_APPID] forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    //【必需配置】鉴权相关：Token
+    [self.curEngine setStringParam:[self.settings getString:SETTING_TOKEN] forKey:SE_PARAMS_KEY_APP_TOKEN_STRING];
+    //【可选配置】使用的AU能力组合，默认只进行ASR识别
+    [self.curEngine setIntParam:[self getAuAbility] forKey:SE_PARAMS_KEY_AU_ABILITY_INT];
+    //【必需配置】识别服务域名
+    [self.curEngine setStringParam:[self.settings getString:SETTING_ADDRESS] forKey:SE_PARAMS_KEY_AU_ADDRESS_STRING];
+    //【必需配置】识别服务Uri
+    [self.curEngine setStringParam:[self.settings getString:SETTING_URI] forKey:SE_PARAMS_KEY_AU_URI_STRING];
+    //【必需配置】识别服务所用集群
+    [self.curEngine setStringParam:[self.settings getString:SETTING_CLUSTER] forKey:SE_PARAMS_KEY_AU_CLUSTER_STRING];
+    //【可选配置】在线请求的建连与接收超时，一般不需配置使用默认值即可
+    [self.curEngine setIntParam:3000 forKey:SE_PARAMS_KEY_AU_CONN_TIMEOUT_INT];
+    [self.curEngine setIntParam:5000 forKey:SE_PARAMS_KEY_AU_RECV_TIMEOUT_INT];
+    //【可选配置】AU处理超时，音乐流程需要额外处理时间，一般不需配置使用默认值即可
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_AU_PROCESS_TIMEOUT] forKey:SE_PARAMS_KEY_AU_PROCESS_TIMEOUT_INT];
+    //【可选配置】AU音频包发送间隔，一般不需配置使用默认值即可
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_AU_AUDIO_PACKET_DURATION] forKey:SE_PARAMS_KEY_AU_AUDIO_PACKET_DURATION_INT];
+    //【可选配置】AU轮询包发送间隔，一般不需配置使用默认值即可
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_AU_EMPTY_PACKET_INTERVAL] forKey:SE_PARAMS_KEY_AU_EMPTY_PACKET_INTERVAL_INT];
+    
+    // 当音频来源为 RECORDER_TYPE_STREAM 时，如输入音频采样率不等于 16K，需添加如下配置
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        if ([self.streamRecorder getSampleRate] != 16000 || [self.streamRecorder getChannel] != 1) {
+            // 当音频来源为 RECORDER_TYPE_STREAM 时【必需配置】，否则【无需配置】
+            // 启用 SDK 内部的重采样
+            [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ENABLE_RESAMPLER_BOOL];
+            // 将重采样所需的输入采样率设置为 APP 层输入的音频的实际采样率
+            [self.curEngine setIntParam:[self.streamRecorder getSampleRate] forKey:SE_PARAMS_KEY_CUSTOM_SAMPLE_RATE_INT];
+            [self.curEngine setIntParam:[self.streamRecorder getChannel] forKey:SE_PARAMS_KEY_CUSTOM_CHANNEL_INT];
+        }
+    }
+}
+
+- (void)configStartAuParams {
+    // Au 部分配置
+    //【可选配置】用户说话最大时长，单位毫秒，默认为 150000ms.
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_VAD_MAX_SPEECH_DURATION] forKey:SE_PARAMS_KEY_VAD_MAX_SPEECH_DURATION_INT];
+    //【可选配置】用户歌唱最大时长，单位毫秒，默认为 12000ms.
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_VAD_MAX_MUSIC_DURATION] forKey:SE_PARAMS_KEY_VAD_MAX_MUSIC_DURATION_INT];
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        if (![self.streamRecorder start]) {
+            [self speechEngineNoPermission];
+            return;
+        }
+    } else if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_FILE]) {
+        // 使用音频文件识别时，需要设置文件的绝对路径
+        NSString* file_path = [NSString stringWithFormat:@"%@/%@", self.debugPath, @"au_rec_file.pcm"];
+        NSLog(@"test file path: %@", file_path);
+        // 使用音频文件识别时【必须配置】，否则【无需配置】
+        [self.curEngine setStringParam:file_path forKey:SE_PARAMS_KEY_RECORDER_FILE_STRING];
+    }
+
+    // Asr 部分配置
+    //【可选配置】是否开启顺滑(DDC)
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_ENABLE_DDC] forKey:SE_PARAMS_KEY_ASR_ENABLE_DDC_BOOL];
+    //【可选配置】是否开启文字转数字(ITN)
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_ENABLE_ITN] forKey:SE_PARAMS_KEY_ASR_ENABLE_ITN_BOOL];
+    //【可选配置】是否开启标点
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_ENABLE_NLU_PUNC] forKey:SE_PARAMS_KEY_ASR_SHOW_NLU_PUNC_BOOL];
+    //【可选配置】设置识别语种
+    [self.curEngine setStringParam:[self.settings getString:SETTING_ASR_LANGUAGE] forKey:SE_PARAMS_KEY_ASR_LANGUAGE_STRING];
+    //【可选配置】是否返回用户说话的语种
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_SHOW_LANGUAGE] forKey:SE_PARAMS_KEY_ASR_SHOW_LANG_BOOL];
+    //【可选配置】控制识别结果返回的形式，全量返回或增量返回，默认为全量
+    [self.curEngine setStringParam:[self.settings getOptionsValue:SETTING_ASR_RESULT_TYPE] forKey:SE_PARAMS_KEY_ASR_RESULT_TYPE_STRING];
+    //【可选配置】设置VAD头部静音时长，用户多久没说话视为空音频，即静音检测时长
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_ASR_VAD_START_SILENCE_TIME] forKey:SE_PARAMS_KEY_ASR_VAD_START_SILENCE_TIME_INT];
+    //【可选配置】设置VAD尾部静音时长，用户说话后停顿多久视为说话结束，即自动判停时长
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_ASR_VAD_END_SILENCE_TIME] forKey:SE_PARAMS_KEY_ASR_VAD_END_SILENCE_TIME_INT];
+    //【可选配置】设置VAD模式，用于定制VAD场景，默认为空
+    [self.curEngine setStringParam:[self.settings getString:SETTING_ASR_VAD_MODE] forKey:SE_PARAMS_KEY_ASR_VAD_MODE_STRING];
+    //【可选配置】更新 ASR 热词
+    if ([self.settings getString:SETTING_ASR_HOTWORDS].length != 0) {
+        [self setHotWords:[self.settings getString:SETTING_ASR_HOTWORDS]];
+    }
+}
+
+- (void)setHotWords:(NSString*) hotWords {
+    [self.curEngine sendDirective:SEDirectiveUpdateAsrHotWords data: hotWords];
+}
+
+#pragma mark - SpeechEngineDelegate
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    switch (type) {
+        case SEEngineStart:
+            [self speechEngineStarted];
+            break;
+        case SEEngineStop:
+            [self speechEngineStopped];
+            break;
+        case SEEngineError:
+            [self speechEngineError:data];
+            break;
+        case SEPartialResult:
+            [self speechEngineResult:data isFinal:FALSE];
+            break;
+        case SEFinalResult:
+            [self speechEngineResult:data isFinal:TRUE];
+            break;
+        case SEVolumeLevel:
+            NSLog(@"volume level: %s", (char*)data.bytes);
+            break;
+        case SEEngineLog:
+            NSLog(@"engine log: %s", (char*)data.bytes);
+            break;
+        default:
+            break;
+    }
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)initEngine:(id)sender {
+    [self initEngine];
+}
+
+- (IBAction)uninitEngine:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self uninitEngine];
+    [self.resultTextView setTextColor:UIColor.grayColor];
+    [self.resultTextView setText:@"点击或按住说话后，展示语音理解结果"];
+}
+
+- (IBAction)startEngine:(id)sender {
+    NSLog(@"配置启动参数");
+    [self configStartAuParams];
+    [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_AU_AUTO_STOP_BOOL];
+    
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+    if (ret == SERecCheckEnvironmentFailed) {
+        [self speechEngineNoPermission];
+    }
+}
+
+- (IBAction)stopEngine:(id)sender {
+    NSLog(@"Stop engine.");
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+}
+
+- (void)longPressTriggered:(UILongPressGestureRecognizer *)longPgr {
+    if (longPgr.state == UIGestureRecognizerStateBegan) {
+        NSLog(@"Long press begin.");
+        
+        [self setResultText:@""];
+        NSLog(@"配置启动参数");
+        [self configStartAuParams];
+        [self.curEngine setBoolParam:FALSE forKey:SE_PARAMS_KEY_AU_AUTO_STOP_BOOL];
+        
+        SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+        if (ret == SERecCheckEnvironmentFailed) {
+            [self speechEngineNoPermission];
+        }
+    } else if (longPgr.state == UIGestureRecognizerStateEnded) {
+        NSLog(@"Long press ended.");
+        self.talkingFinisheTimestamp = [[NSDate date] timeIntervalSince1970] * 1000;
+        [self.curEngine sendDirective:SEDirectiveFinishTalking];
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.streamRecorder stop];
+        }
+    }
+}
+
+#pragma mark - Init Methods
+
+- (void)initEngine {
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    if (appDelegate.deviceID.length < 1) {
+        self.engineInitButton.enabled = FALSE;
+        dispatch_async(dispatch_get_main_queue(), ^{
+            [self.statusTextView setText:@"Waiting for get deviceID."];
+            sleep(1);
+            [self initEngine];
+        });
+        return;
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+    
+
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+    }
+    if (![self.curEngine createEngineWithDelegate:self]) {
+        NSLog(@"Create speech engine failed.");
+        return;
+    }
+
+    [self.resultTextView setTextColor:UIColor.blackColor];
+
+    NSLog(@"SDK 版本号: %@", [self.curEngine getVersion]);
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"当前调试路径: %@", self.debugPath);
+
+    NSLog(@"配置初始化参数");
+    [self configInitAuParams];
+    
+    NSLog(@"引擎初始化");
+    SEEngineErrorCode ret = [self.curEngine initEngine];
+    if (ret != SENoError) {
+        NSLog(@"初始化失败，返回值: %ld", ret);
+    }
+    if (ret == SENoError) {
+        [self speechEngineInitOk];
+    } else {
+        [self speechEngineInitFailed];
+    }
+}
+
+- (NSString *)getRecorderType {
+    SettingOptions* recorderTypeOptions = [self.settings getOptions:SETTING_RECORD_TYPE];
+    switch (recorderTypeOptions.chooseIdx) {
+        case 0:
+            return SE_RECORDER_TYPE_RECORDER;
+        case 1:
+            return SE_RECORDER_TYPE_FILE;
+        case 2:
+            return SE_RECORDER_TYPE_STREAM;
+        default:
+            break;
+    }
+    return @"";
+}
+
+- (int)getAuAbility {
+    SettingOptions* auAbilityOptions = [self.settings getOptions:SETTING_AU_ABILITY];
+    switch (auAbilityOptions.chooseIdx) {
+        case 0:
+            return SEAuAbilityAsr;
+        case 1:
+            return SEAuAbilityMusic;
+        case 2:
+            return SEAuAbilityAsr | SEAuAbilityMusic;
+        default:
+            return SEAuAbilityAsr;
+    }
+}
+
+- (void)uninitEngine {
+    [self.curEngine destroyEngine];
+    self.curEngine = nil;
+    self.engineInitButton.enabled = TRUE;
+    self.engineUninitButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.longPressButton.enabled = FALSE;
+}
+
+#pragma mark - Engine Callback
+
+- (void)speechEngineNoPermission {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"No permission!"];
+        self.engineInitButton.enabled = TRUE;
+        self.engineUninitButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineInitOk {
+    [self.streamRecorder setSpeechEngine:VIEW_AU engine:self.curEngine];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.statusTextView setText:@"Ready"];
+        [self.resultTextView setText:[NSString stringWithFormat:@"DeviceID: %@", self.deviceID]];
+        self.engineUninitButton.enabled = TRUE;
+        self.engineInitButton.enabled = FALSE;
+        self.startEngineButton.enabled = TRUE;
+        self.longPressButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineInitFailed {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"Failed to init engine!"];
+        self.engineInitButton.enabled = TRUE;
+        self.engineUninitButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineStarted {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.startEngineTimestamp = [[NSDate date] timeIntervalSince1970] * 1000;
+        self.engineStarted = true;
+        [self.statusTextView setText:@"Engine Started!"];
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = TRUE;
+        self.longPressButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineStopped {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.streamRecorder stop];
+        }
+        self.engineStarted = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+        self.startEngineButton.enabled = TRUE;
+        self.stopEngineButton.enabled = FALSE;
+        self.longPressButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineResult:(NSData *)data isFinal:(BOOL)isFinal {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        long response_delay = 0;
+        if (isFinal && self.talkingFinisheTimestamp > 0) {
+            response_delay = [self timeDelayFrom:self.talkingFinisheTimestamp];
+            self.talkingFinisheTimestamp = 0;
+        }
+        
+        NSMutableString *text = [[NSMutableString alloc] initWithString:@""];
+        [text appendFormat:@"result: %@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]];
+        if (isFinal) {
+            [text appendFormat:@"\nresponse_delay: %ld", response_delay];
+        }
+        [self.resultTextView setText:[text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+    });
+}
+
+- (void)speechEngineError:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]];
+//        [self stopEngine:nil];
+    });
+}
+
+- (void)setResultText:(NSString *)result {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[result stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+    });
+}
+
+#pragma mark - Helper
+
+- (long)timeDelayFrom:(long)pastTimestamp {
+    return [[NSDate date] timeIntervalSince1970] * 1000 - pastTimestamp;
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_AU forKey:@"viewId"];
+}
+
+@end
+

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/BiTTSViewController.h

@@ -0,0 +1,17 @@
+//
+//  BiTTSViewController.h
+//  SpeechDemo
+//
+//  Created by ByteDance on 2025/7/3.
+//  Copyright © 2025 fangweiwei. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface BiTTSViewController : UIViewController
+
+@end
+
+NS_ASSUME_NONNULL_END

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/BiTTSViewController.m

@@ -0,0 +1,778 @@
+//
+//  BiTTSViewController.m
+//  SpeechDemo
+//
+//  Created by ByteDance on 2025/7/3.
+//  Copyright © 2025 fangweiwei. All rights reserved.
+//
+
+#import "BiTTSViewController.h"
+#include <CoreFoundation/CoreFoundation.h>
+#include <objc/objc.h>
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SensitiveDefines.h"
+
+static int TTS_MAX_RETRY_COUNT = 3;
+
+@interface BiTTSViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+@property (weak, nonatomic) IBOutlet UITextView *referTextView;
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *engineSwitchButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *synthesisButton;
+@property (weak, nonatomic) IBOutlet UIButton *pauseResumeButton;
+
+// Device ID: 用于定位线上问题
+@property (nonatomic, strong) NSString *deviceID;
+// Debug Path: 用于存放一些 SDK 相关的文件，比如模型、日志等
+@property (strong, nonatomic) NSString *debugPath;
+
+// SpeechEngine
+@property (strong, nonatomic) SpeechEngine *curEngine;
+
+// Engine State
+@property (assign, nonatomic) BOOL engineInited;
+@property (assign, nonatomic) BOOL engineStarted;
+@property (assign, nonatomic) BOOL engineErrorOccurred;
+@property (assign, nonatomic) BOOL playerPaused;
+@property (assign, nonatomic) BOOL refTextChanged;
+// Settings
+@property (strong, nonatomic) Settings *settings;
+
+// 一些在线合成的配置
+@property (strong, nonatomic) NSString *ttsAppId;
+@property (strong, nonatomic) NSString *ttsVoiceOnline;
+@property (strong, nonatomic) NSString *ttsVoiceTypeOnline;
+
+
+// tts合成文本相关
+@property (assign, nonatomic) int ttsSynthesisIndex;
+@property (strong, nonatomic) NSMutableArray* ttsSynthesisText;
+@property (strong, nonatomic) NSMutableDictionary* ttsSynthesisMap;
+
+@property (assign, nonatomic) int ttsRetryCount;
+
+
+@end
+
+@implementation BiTTSViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_BITTS];
+    
+    self.engineSwitchButton.enabled = TRUE;
+    [self decorateTextView:self.referTextView];
+    [self decorateTextView:self.resultTextView];
+    [self.referTextView setDelegate:self];
+    self.referTextView.editable = TRUE;
+    self.engineInited = FALSE;
+    self.engineStarted = FALSE;
+    self.engineErrorOccurred = FALSE;
+    self.playerPaused = FALSE;
+    
+    // 初始化和tts有关的字段
+    self.ttsSynthesisIndex = 0;
+    self.ttsSynthesisText = [[NSMutableArray alloc] init];
+    self.ttsSynthesisMap = [[NSMutableDictionary alloc]init];
+    
+    self.ttsRetryCount = TTS_MAX_RETRY_COUNT;
+    
+    [self.referTextView setText:@"愿中国青年都摆脱冷气，只是向上走，不必听自暴自弃者流的话。能做事的做事，能发声的发声。有一分热，发一分光。就令萤火一般，也可以在黑暗里发一点光，不必等候炬火。此后如竟没有炬火：我便是唯一的光。"];
+    [self.statusTextView setText:@"Waiting for init."];
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"当前调试路径 %@", self.debugPath);
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(audioInterruptionHandler:)
+                                                 name:AVAudioSessionInterruptionNotification
+                                               object:nil];
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+#pragma mark - Notifications
+
+-(void)appWillTerminate:(NSNotification*)note {
+    [[NSNotificationCenter defaultCenter] removeObserver:self
+                                                    name:AVAudioSessionInterruptionNotification
+                                                  object:nil];
+}
+
+- (void)audioInterruptionHandler:(NSNotification*)notification {
+    AVAudioSessionInterruptionType interruptionType = (AVAudioSessionInterruptionType)[[notification.userInfo objectForKey:AVAudioSessionInterruptionTypeKey] unsignedIntegerValue];
+    AVAudioSessionInterruptionOptions intertuptionOptions = [[notification.userInfo objectForKey:AVAudioSessionInterruptionOptionKey] unsignedIntValue];
+    NSLog(@"Receive audio interruption notification, type: %lu, options: %lu.", (unsigned long)interruptionType, (unsigned long)intertuptionOptions);
+    if (interruptionType == AVAudioSessionInterruptionTypeBegan) {
+        NSLog(@"Audio session interruption began");
+        @synchronized (self) {
+            [self pausePlayback];
+        }
+    } else if (interruptionType == AVAudioSessionInterruptionTypeEnded) {
+        @synchronized (self) {
+            NSLog(@"Audio session interruption ended");
+            if (intertuptionOptions == AVAudioSessionInterruptionOptionShouldResume) {
+                AVAudioSession *session = [AVAudioSession sharedInstance];
+                AVAudioSessionCategoryOptions cur_options = session.categoryOptions;
+                // AudioQueueStart() will return AVAudioSessionErrorCodeCannotInterruptOthers if options didn't contains AVAudioSessionCategoryOptionMixWithOthers
+                if (!(cur_options & AVAudioSessionCategoryOptionMixWithOthers)) {
+                    AVAudioSessionCategoryOptions readyOptions = AVAudioSessionCategoryOptionMixWithOthers | cur_options;
+                    [session setCategory:AVAudioSessionCategoryPlayback withOptions:readyOptions error:nil];
+                }
+                [self resumePlayback];
+                
+                cur_options = session.categoryOptions;
+                // Remove AVAudioSessionCategoryOptionMixWithOthers, or the playback will not be interrupted any more
+                if (cur_options & AVAudioSessionCategoryOptionMixWithOthers) {
+                    [session setCategory:AVAudioSessionCategoryPlayback withOptions:((~AVAudioSessionCategoryOptionMixWithOthers) & cur_options) error:nil];
+                }
+            }
+        }
+    }
+}
+
+#pragma mark - Config & Init & Uninit Methods
+
+-(void)configInitParams {
+    //【必需配置】Engine Name
+    [self.curEngine setStringParam:SE_BITTS_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+    
+    
+    //【可选配置】Debug & Log
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.curEngine setStringParam:SE_LOG_LEVEL_DEBUG forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+    
+    //【可选配置】User ID（用以辅助定位线上用户问题）
+    [self.curEngine setStringParam:SDEF_UID forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setStringParam:self.deviceID forKey:SE_PARAMS_KEY_DEVICE_ID_STRING];
+    
+    //【可选配置】是否将合成出的音频保存到设备上，为 true 时需要正确配置 PARAMS_KEY_TTS_AUDIO_PATH_STRING 才会生效
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_TTS_ENABLE_DUMP]
+                          forKey:SE_PARAMS_KEY_TTS_ENABLE_DUMP_BOOL];
+    // TTS 音频文件保存目录，必须在合成之前创建好且 APP 具有访问权限，保存的音频文件名格式为 tts_{reqid}.wav, {reqid} 是本次合成的请求 id
+    // PARAMS_KEY_TTS_ENABLE_DUMP_BOOL 配置为 true 的音频时为【必需配置】，否则为【可选配置】
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_TTS_AUDIO_PATH_STRING];
+    //【可选配置】自定义请求Header
+    NSString* headerStr = [self.settings getString:SETTING_REQUEST_HEADERS];
+    if ([headerStr isEqualToString:@""]) {
+        headerStr = @"{}";
+    }
+    [self.curEngine setStringParam:headerStr forKey:SE_PARAMS_KEY_REQUEST_HEADERS_STRING];
+    
+    //【可选配置】是否使用 SDK 内置播放器播放合成出的音频，默认为 true
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_TTS_ENABLE_PLAYER]
+                          forKey:SE_PARAMS_KEY_TTS_ENABLE_PLAYER_BOOL];
+    //【可选配置】是否令 SDK 通过回调返回合成的音频数据，默认不返回。
+    // 开启后，SDK 会流式返回音频，收到 SETtsAudioData 回调表示当次合成所有的音频已经全部返回
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ENABLE_PLAYER_AUDIO_CALL_BACK] ? SETtsDataCallbackModeAll : SETtsDataCallbackModeNone forKey:SE_PARAMS_KEY_ENABLE_PLAYER_AUDIO_CALLBACK_BOOL];
+    
+    // ------------------------ 在线合成相关配置 -----------------------
+    
+    NSString* appid = [self.settings getString:SETTING_APPID];
+    self.ttsAppId = appid.length > 0 ? appid : SDEF_APPID;
+    //【必需配置】在线合成鉴权相关：Appid
+    [self.curEngine setStringParam:self.ttsAppId forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    
+    NSString* token = [self.settings getString:SETTING_TOKEN];
+    NSString* ttsAppToken = token.length > 0 ? token : SDEF_TOKEN;
+    //【必需配置】在线合成鉴权相关：Token
+    [self.curEngine setStringParam:ttsAppToken forKey:SE_PARAMS_KEY_APP_TOKEN_STRING];
+    
+    
+    NSString *address = [self.settings getString:SETTING_ADDRESS];
+    NSString *ttsAddress = address.length > 0 ? address : SDEF_DEFAULT_ADDRESS;
+    //【必需配置】语音合成服务域名
+    [self.curEngine setStringParam:ttsAddress forKey:SE_PARAMS_KEY_TTS_ADDRESS_STRING];
+    
+    NSString *uri = [self.settings getString:SETTING_URI];
+    NSString *ttsUri = uri.length > 0 ? uri : SDEF_BITTS_DEFAULT_URI;
+    //【必需配置】语音合成服务Uri
+    [self.curEngine setStringParam:ttsUri forKey:SE_PARAMS_KEY_TTS_URI_STRING];
+    
+    NSString *resourceId = [self.settings getString:SETTING_RESOURCE_ID];
+    //【必需配置】语音合成服务资源id
+    [self.curEngine setStringParam:resourceId forKey: SE_PARAMS_KEY_RESOURCE_ID_STRING];
+    //【可选配置】TTS连接超时时间
+    [self.curEngine setIntParam:10000 forKey:SE_PARAMS_KEY_TTS_CONN_TIMEOUT_INT];
+
+}
+
+-(void)configStartTtsParams {
+    // 准备待合成的文本
+    if(![self prepareBiTTSText]) {
+        char fake_error_info[] = "{err_code:3006, err_msg:\"Invalid input text.\"}";
+        [self speechEngineError:[NSData dataWithBytes:fake_error_info length:sizeof(fake_error_info)]];
+        return;
+    }
+}
+
+- (NSString*)getSynthesisText {
+    if(self.refTextChanged){ //如果文本有变更重新追加进去
+        self.refTextChanged = FALSE;
+        
+        __block NSString* refText = nil;
+        if (![NSThread isMainThread]) {
+            dispatch_sync(dispatch_get_main_queue(), ^{
+                refText = self.referTextView.text;
+            });
+        } else {
+            refText = self.referTextView.text; // 已经在主线程，直接赋值
+        }
+        
+        if (refText.length > 0) {
+            NSError *error = nil;
+            NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"[^;!?。！？；…]+[;!?。！？；…]?" options:0 error:&error];
+            
+            if (!error) {
+                NSArray<NSTextCheckingResult *> *matches = [regex matchesInString:refText options:0 range:NSMakeRange(0, refText.length)];
+                
+                for (NSTextCheckingResult *match in matches) {
+                    NSString *sentence = [refText substringWithRange:match.range];
+                    [self addSentence:sentence];
+                }
+            }
+        }
+    }
+    
+    if(self.ttsSynthesisIndex == [self.ttsSynthesisText count]){
+        NSLog(@"no more tts conttent to synthesis");
+        [self updateTtsResultText:@"No More Text to Synthesis"];
+        return nil;
+    }
+    
+    NSString* text = self.ttsSynthesisText[self.ttsSynthesisIndex];
+    NSLog(@"Synthesis: %d, text: %@", self.ttsSynthesisIndex, text);
+    self.ttsSynthesisIndex = (self.ttsSynthesisIndex + 1);
+    return text;
+}
+
+- (void)initEngine {
+    NSLog(@"获取设备ID，调试使用");
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+    NSLog(@"获取设备ID成功: %@", self.deviceID);
+    
+    
+    NSLog(@"创建引擎");
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+        if (![self.curEngine createEngineWithDelegate:self]) {
+            NSLog(@"引擎创建失败.");
+            return;
+        }
+    }
+    NSLog(@"SDK 版本号: %@", [self.curEngine getVersion]);
+    [self initEngineInternal];
+}
+
+
+
+- (void)initEngineInternal {
+    NSLog(@"配置初始化参数");
+    [self configInitParams];
+    
+    NSLog(@"引擎初始化");
+    SEEngineErrorCode ret = [self.curEngine initEngine];
+    self.engineInited = (ret == SENoError);
+    if (self.engineInited) {
+        NSLog(@"初始化成功");
+        [self speechEngineInitSucceeded];
+    } else {
+        NSLog(@"初始化失败，返回值: %d", ret);
+        [self speechEngineInitFailed:ret];
+    }
+}
+
+- (void)uninitEngine {
+    if (self.curEngine != nil) {
+        NSLog(@"引擎析构");
+        [self.curEngine destroyEngine];
+        self.curEngine = nil;
+        NSLog(@"引擎析构完成");
+    }
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)switchEngine:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self clearResult:nil];
+    self.startEngineButton.enabled = FALSE;
+    self.synthesisButton.enabled = FALSE;
+    self.pauseResumeButton.enabled = FALSE;
+    if (self.engineInited) {
+        self.referTextView.editable = TRUE;
+        [self uninitEngine];
+        self.engineInited = FALSE;
+        [self.statusTextView setText:@"Waiting for init."];
+        self.engineSwitchButton.enabled = TRUE;
+        [self.engineSwitchButton setTitle:@"Init Engine" forState:UIControlStateNormal];
+        self.stopEngineButton.enabled = FALSE;
+    } else {
+        self.referTextView.editable = TRUE;
+        [self initEngine];
+    }
+}
+
+- (IBAction)Synthesis:(id)sender {
+    [self triggerSynthesis];
+}
+
+- (IBAction)startEngineBtnClicked:(id)sender {
+    NSLog(@"Start engine, current status: %d", self.engineStarted);
+    if (!self.engineStarted) {
+        [self clearResult:nil];
+        self.engineErrorOccurred = FALSE;
+        
+        // Directive：启动引擎前调用SYNC_STOP指令，保证前一次请求结束。
+        NSLog(@"关闭引擎（同步）");
+        NSLog(@"Directive: SEDirectiveSyncStopEngine");
+        SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveSyncStopEngine];
+        if (ret != SENoError) {
+            NSLog(@"Send directive syncstop failed: %d", ret);
+        } else {
+            [self configStartTtsParams];
+            
+            NSLog(@"启动引擎.");
+            NSLog(@"Directive: SEDirectiveStartEngine");
+            NSString* startPayload = @"{\"req_params\":{\"speaker\":\"zh_female_roumeinvyou_emo_v2_mars_bigtts\",\"audio_params\":{\"emotion\":\"excited\",\"loudness_rate\":50}}}";
+            SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine data:startPayload];
+            if (SENoError != ret) {
+                NSString* message = [NSString stringWithFormat:@"发送启动引擎指令失败: %d", ret];
+                [self sendStartEngineDirectiveFailed:message];
+            }
+        }
+    }
+}
+
+- (IBAction)stopEngineBtnClicked:(id)sender {
+    NSLog(@"关闭引擎");
+    NSLog(@"Directive: SEDirectiveStopEngine");
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+}
+
+- (void)pausePlayback {
+    NSLog(@"暂停播放");
+    NSLog(@"Directive: SEDirectivePausePlayer");
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectivePausePlayer];
+    if (ret == SENoError) {
+        self.playerPaused = TRUE;
+        [self.pauseResumeButton setTitle:@"Resume" forState:UIControlStateNormal];
+    }
+    NSLog(@"Pause playback status: %d", ret);
+}
+
+- (void)resumePlayback {
+    NSLog(@"继续播放");
+    NSLog(@"Directive: SEDirectiveResumePlayer");
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveResumePlayer];
+    if (ret == SENoError) {
+        self.playerPaused = FALSE;
+        [self.pauseResumeButton setTitle:@"Pause" forState:UIControlStateNormal];
+    }
+    NSLog(@"Resume playback status: %d", ret);
+}
+
+- (IBAction)controlPlayingStatus:(id)sender {
+    NSLog(@"Pause or resume player, current player status: %hhd", self.playerPaused);
+    if (self.playerPaused) {
+        [self resumePlayback];
+    } else {
+        [self pausePlayback];
+    }
+}
+
+- (IBAction)clearResult:(id)sender {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:@""];
+    });
+}
+
+#pragma mark - Message Callback
+
+
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    switch (type) {
+        case SEEngineStart:
+            NSLog(@"Callback: 引擎启动成功: data: %@", data);
+            [self speechEngineStarted];
+            break;
+        case SEEngineStop:
+            NSLog(@"Callback: 引擎关闭: data: %@", data);
+            [self speechEngineStopped];
+            break;
+        case SEEngineError:
+            NSLog(@"Callback: 错误信息: %@", data);
+            [self speechEngineError:data];
+            break;
+        case SEEventConnectionStarted:
+            NSLog(@"Callback: SEEventConnectionStarted");
+            break;
+        case SEEventConnectionFailed:
+            NSLog(@"Callback: SEEventConnectionFailed");
+            break;
+        case SEEventConnectionFinished:
+            NSLog(@"Callback: SEEventConnectionFinished");
+            break;
+        case SEEventSessionStarted:
+            NSLog(@"Callback: SEEventSessionStarted");
+            break;
+        case SEEventSessionCanceled:
+            NSLog(@"Callback: SEEventSessionCanceled");
+            break;
+        case SEEventSessionFinished:
+            NSLog(@"Callback: SEEventSessionFinished");
+            break;
+        case SEEventSessionFailed:
+            NSLog(@"Callback: SEEventSessionFailed");
+            break;
+        case SEEventTTSSentenceStart:
+            [self speechStartSynthesis:data];
+            NSLog(@"Callback: 合成开始 SentenceStart: %@", data);
+            break;
+        case SEEventTTSSentenceEnd:
+            [self speechFinishSynthesis:data];
+            NSLog(@"Callback: 合成结束 SentenceEnd: %@", data);
+        case SEEventTTSResponse:
+            NSLog(@"Callback: 收到合成音频 TTSResponse: %@", data);
+        case SEEventTTSEnded:
+            NSLog(@"Callback: TTSEnd: %@", data);
+        case SEPlayerAudioData:
+//            NSLog(@"Callback: 播放的pcm音频: %@", data);
+            break;
+        case SEPlayerStartPlayAudio:
+            NSLog(@"Callback: 开始播放TTS音频");
+            [self speechStartPlaying:nil];
+            break;
+        case SEPlayerFinishPlayAudio:
+            NSLog(@"Callback: 结束播放TTS音频");
+            [self speechFinishPlaying:nil];
+            break;
+        default:
+            break;
+    }
+}
+
+- (void)speechEngineInitSucceeded {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.engineSwitchButton.enabled = TRUE;
+        [self.engineSwitchButton setTitle:@"UninitEngine" forState:UIControlStateNormal];
+        [self.statusTextView setText:@"Ready"];
+        [self.resultTextView setText:[NSString stringWithFormat:@"DeviceID: %@.", self.deviceID]];
+        self.referTextView.editable = TRUE;
+        self.startEngineButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineInitFailed:(int)initStatus {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:[[NSString alloc] initWithFormat:@"Failed to init engine, %d!", initStatus]];
+        self.engineSwitchButton.enabled = TRUE;
+    });
+}
+
+- (void)sendSynthesisDirectiveFailed:(NSString*)tipText {
+    NSLog(@"%@", tipText);
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:tipText];
+        [self.curEngine sendDirective:SEDirectiveStopEngine];
+    });
+}
+
+- (void)sendStartEngineDirectiveFailed:(NSString*)tipText {
+    NSLog(@"%@", tipText);
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:tipText];
+        self.engineStarted = FALSE;
+    });
+}
+
+- (void)speechEngineStarted {
+    self.ttsRetryCount = TTS_MAX_RETRY_COUNT;
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.referTextView.editable = TRUE;
+        self.engineStarted = true;
+        [self.statusTextView setText:@"Engine Started!"];
+        self.startEngineButton.enabled = FALSE;
+        self.synthesisButton.enabled = TRUE;
+        self.stopEngineButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineStopped {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.referTextView.editable = TRUE;
+        self.engineStarted = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+        self.startEngineButton.enabled = TRUE;
+        self.synthesisButton.enabled = FALSE;
+        self.stopEngineButton.enabled = FALSE;
+        [self.pauseResumeButton setTitle:@"Pause" forState:UIControlStateNormal];
+        self.pauseResumeButton.enabled = FALSE;
+        self.playerPaused = FALSE;
+    });
+}
+
+- (void)speechEngineError:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        
+        BOOL needStop = NO;
+        id json_obj = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
+        if ([json_obj isKindOfClass:[NSDictionary class]]) {
+            NSDictionary *error_info = json_obj;
+            NSInteger code = [[error_info objectForKey:@"err_code"] intValue];
+            switch (code) {
+                case SETTSLimitQps:
+                case SETTSLimitCount:
+                case SETTSServerBusy:
+                case SETTSLongText:
+                case SETTSInvalidText:
+                case SETTSSynthesisTimeout:
+                case SETTSSynthesisError:
+                case SETTSSynthesisWaitingTimeout:
+                case SETTSErrorUnknown:
+                    NSLog(@"When meeting this kind of error, continue to synthesize.");
+                    [self triggerSynthesis];
+                    break;
+                case SEConnectTimeout:
+                case SEReceiveTimeout:
+                case SENetLibError:
+                    // 遇到网络错误时建议重试，重试次数不超过 3 次
+                    needStop = ![self retrySynthesis];
+                    if (needStop) {
+                        self.engineErrorOccurred = TRUE;
+                    }
+                    break;
+                default:
+                    needStop = YES;
+                    self.engineErrorOccurred = TRUE;
+                    dispatch_async(dispatch_get_main_queue(), ^{
+                        [self.resultTextView
+                         setText:[[NSString alloc]
+                                  initWithData:data
+                                  encoding:NSUTF8StringEncoding]];
+                    });
+                    break;
+            }
+        } else {
+            needStop = YES;
+        }
+        if (needStop) {
+            [self.curEngine sendDirective:SEDirectiveStopEngine];
+        }
+    });
+}
+
+- (void)scrollTextViewToBottom {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if (self.resultTextView.text.length > 0) {
+            NSRange bottomRange = NSMakeRange(self.resultTextView.text.length - 1, 1);
+            [self.resultTextView scrollRangeToVisible:bottomRange];
+            [self.resultTextView layoutIfNeeded];
+        }
+    });
+}
+
+-(void)updateTtsResultText:(NSString*) playingId {
+    if (self.engineErrorOccurred) {
+        NSLog(@"When a fatal error occurs, prevent the playback text from being displayed.");
+        return;
+    }
+    
+    dispatch_async(dispatch_get_main_queue(), ^{
+        NSString *currentText = self.resultTextView.text ?: @"";
+        NSString *newText = [NSString stringWithFormat:@"%@\n%@", currentText, playingId];
+        [self.resultTextView setText:newText];
+    });
+    
+    [self scrollTextViewToBottom];
+}
+
+- (void)speechStartSynthesis:(NSData *)data {
+    if (self.ttsSynthesisIndex < [self.ttsSynthesisText count]) {
+        NSString* req_id = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
+        [self.ttsSynthesisMap setValue:[NSNumber numberWithInt:self.ttsSynthesisIndex] forKey:req_id];
+    }
+    
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.synthesisButton.enabled = FALSE;
+    });
+}
+
+- (void)speechFinishSynthesis:(NSData *)data {
+    if (self.ttsRetryCount < TTS_MAX_RETRY_COUNT) {
+        self.ttsRetryCount = TTS_MAX_RETRY_COUNT;
+    }
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.synthesisButton.enabled = TRUE;
+    });
+}
+
+- (void)speechStartPlaying:(NSData *)data {
+    NSLog(@"TTS start playing");
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.pauseResumeButton.enabled = TRUE;
+    });
+}
+
+
+- (void)speechFinishPlaying :(NSData *)data {
+    NSLog(@"TTS finish playing");
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self updateTtsResultText:@"playing finished"];
+    });
+    [self triggerSynthesis];
+ 
+}
+
+- (void)speechTtsAudioData:(NSData *)data {
+}
+
+- (BOOL)retrySynthesis {
+    BOOL ret = FALSE;
+    if (self.engineStarted && self.ttsRetryCount > 0) {
+        NSLog(@"Retry synthesis for text: %@", self.ttsSynthesisText[self.ttsSynthesisIndex]);
+        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, NSEC_PER_SEC), dispatch_get_main_queue(), ^{
+            [self triggerSynthesis];
+        });
+        self.ttsRetryCount -= 1;
+        ret = TRUE;
+    }
+    return ret;
+}
+
+-(void)triggerSynthesis {
+    NSString *text = [self getSynthesisText];
+    if(text == nil){
+        return;
+    }
+    
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveEventStartSession data:@""];
+    if (ret != SENoError) {
+        NSLog(@"Start Session faile: %d", ret);
+    }
+    
+    NSString* taskRequestJson = [NSString stringWithFormat: @"{\"req_params\":{\"text\":\"%@\"}}", text];
+    // SEDirectiveTaskRequest 是可以连续发送的，服务端会缓存每一句文本，然后按顺序通过sentence_start 、 task respnse...  sentence_end返回当前处理句的结果
+    ret = [self.curEngine sendDirective:SEDirectiveEventTaskRequest data:taskRequestJson];
+    [self updateTtsResultText:text];
+    NSLog(@"触发合成");
+    NSLog(@"Directive: SEDirectiveTaskRequest");
+    if (ret != SENoError) {
+        NSLog(@"Synthesis faile: %d", ret);
+    }
+    
+    ret = [self.curEngine sendDirective:SEDirectiveEventFinishSession data:@""];
+    if (ret != SENoError) {
+        NSLog(@"Finish Session faile: %d", ret);
+    }
+}
+
+-(void)addSentence:(NSString*) text {
+    NSCharacterSet* blankChar = [NSCharacterSet characterSetWithCharactersInString:@" "];
+    NSString* tmp = [text stringByTrimmingCharactersInSet:blankChar];
+    if (tmp.length > 0) {
+        [self.ttsSynthesisText addObject:tmp];
+    }
+}
+
+-(void)resetTtsContext {
+    self.ttsSynthesisIndex = 0;
+    [self.ttsSynthesisText removeAllObjects];
+    [self.ttsSynthesisMap removeAllObjects];
+}
+
+-(BOOL)prepareBiTTSText {
+    [self resetTtsContext];
+    __block NSString* text = nil;
+    if (![NSThread isMainThread]) {
+        dispatch_sync(dispatch_get_main_queue(), ^{
+            text = self.referTextView.text;
+        });
+    } else {
+        text = self.referTextView.text; // 已经在主线程，直接赋值
+    }
+    if (text.length <= 0) {
+        text = @"愿中国青年都摆脱冷气，只是向上走，不必听自暴自弃者流的话。能做事的做事，能发声的发声。有一分热，发一分光。就令萤火一般，也可以在黑暗里发一点光，不必等候炬火。此后如竟没有炬火：我便是唯一的光。";
+    }
+    if (self.ttsSynthesisText == nil || [self.ttsSynthesisText count] <= 0) {
+        // 使用下面几个标点符号来分句，会让通过 MESSAGE_TYPE_TTS_PLAYBACK_PROGRESS 返回的播放进度更加准确
+        NSArray* temp = [text componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@";!?。！？；…"]];
+        if (text.length > 0) {
+            NSError *error = nil;
+            NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"[^;!?。！？；…]+[;!?。！？；…]?" options:0 error:&error];
+            
+            if (!error) {
+                NSArray<NSTextCheckingResult *> *matches = [regex matchesInString:text options:0 range:NSMakeRange(0, text.length)];
+                
+                for (NSTextCheckingResult *match in matches) {
+                    NSString *sentence = [text substringWithRange:match.range];
+                    [self addSentence:sentence];
+                }
+            }
+        }
+    }
+    NSLog(@"Synthesis text item num: %ld.", [self.ttsSynthesisText count]);
+    return [self.ttsSynthesisText count] > 0;
+}
+
+#pragma mark - Helper
+
+- (long)timeDelayFrom:(long)pastTimestamp {
+    return [[NSDate date] timeIntervalSince1970] * 1000 - pastTimestamp;
+}
+
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+- (void)textViewDidChange:(UITextView *)textView {
+    if(textView == _referTextView){
+        self.refTextChanged = TRUE;
+    }
+}
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_BITTS forKey:@"viewId"];
+}
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/BigAsrViewController.h

@@ -0,0 +1,13 @@
+//
+//  BigAsrViewController.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2024/9/9.
+//  Copyright © 2024 chengzihao.ds. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface BigAsrViewController : UIViewController
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/BigAsrViewController.m

@@ -0,0 +1,465 @@
+//
+//  BigAsrViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2024/9/9.
+//  Copyright © 2024 chengzihao.ds. All rights reserved.
+//
+
+#import "BigAsrViewController.h"
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SensitiveDefines.h"
+
+@interface BigAsrViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+// UI
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *initialEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *uninitialEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *recordButton;
+
+// Device ID: 用于定位线上问题
+@property (nonatomic, strong) NSString *deviceID;
+// Debug Path: 用于存放一些 SDK 相关的文件，比如模型、日志等
+@property (strong, nonatomic) NSString *debugPath;
+
+// SpeechEngine
+@property (strong, nonatomic) SpeechEngine *curEngine;
+@property (assign, nonatomic) BOOL engineStarted;
+
+// Settings
+@property (strong, nonatomic) Settings *settings;
+
+// APP 层自定义的录音机，在音频来源为 Stream 时使用
+@property (weak, nonatomic) StreamRecorder *streamRecorder;
+
+@end
+
+@implementation BigAsrViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    self.initialEngineButton.enabled = TRUE;
+    self.uninitialEngineButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.recordButton.enabled = FALSE;
+    
+    [self.statusTextView setText:@"Waiting for init."];
+    [self decorateTextView:self.resultTextView];
+    
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    UILongPressGestureRecognizer *longPgr = [[UILongPressGestureRecognizer alloc] initWithTarget:self
+                                                                                          action:@selector(recordTriggered:)];
+    longPgr.minimumPressDuration = 0.5;
+    [self.recordButton addGestureRecognizer:longPgr];
+    
+    self.streamRecorder = [ViewController getStreamRecorder];
+    self.engineStarted = FALSE;
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_BIGASR];
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"当前调试路径 %@", self.debugPath);
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self uninitEngine];
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+#pragma mark - Config & Init & Uninit Methods
+
+-(void)configInitParams{
+    //【必需配置】Engine Name
+    [self.curEngine setStringParam:SE_ASR_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+    
+    //【可选配置】Debug & Log
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.curEngine setStringParam:SE_LOG_LEVEL_DEBUG forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+
+    //【可选配置】UID & deviceID: 用于定位线上问题
+    [self.curEngine setStringParam:SDEF_UID forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setStringParam:self.deviceID forKey:SE_PARAMS_KEY_DEVICE_ID_STRING];
+    
+    //【必需配置】配置音频来源
+    [self.curEngine setStringParam:[self getRecorderType] forKey:SE_PARAMS_KEY_RECORDER_TYPE_STRING];
+
+    if ([self.settings getBool:SETTING_ASR_RECORDER_SAVE]) {
+        //【可选配置】录音文件保存路径，如配置，SDK会将录音保存到该路径下，文件格式为 .wav
+        [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_ASR_REC_PATH_STRING];
+    }
+    
+    // 当音频来源为 RECORDER_TYPE_STREAM 时，如输入音频采样率不等于 16K，需添加如下配置
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        if ([self.streamRecorder getSampleRate] != 16000 || [self.streamRecorder getChannel] != 1) {
+            // 当音频来源为 RECORDER_TYPE_STREAM 时【必需配置】，否则【无需配置】
+            // 启用 SDK 内部的重采样
+            [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ENABLE_RESAMPLER_BOOL];
+            // 将重采样所需的输入采样率设置为 APP 层输入的音频的实际采样率
+            [self.curEngine setIntParam:[self.streamRecorder getSampleRate] forKey:SE_PARAMS_KEY_CUSTOM_SAMPLE_RATE_INT];
+            [self.curEngine setIntParam:[self.streamRecorder getChannel] forKey:SE_PARAMS_KEY_CUSTOM_CHANNEL_INT];
+        }
+    }
+    //【必需配置】识别服务域名
+    [self.curEngine setStringParam:[self.settings getString:SETTING_ADDRESS] forKey:SE_PARAMS_KEY_ASR_ADDRESS_STRING];
+    //【必需配置】识别服务Uri
+    [self.curEngine setStringParam:[self.settings getString:SETTING_URI] forKey:SE_PARAMS_KEY_ASR_URI_STRING];
+    
+    //【必需配置】鉴权相关：Appid
+    [self.curEngine setStringParam:[self.settings getString:SETTING_APPID] forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    //【必需配置】鉴权相关：Token
+    [self.curEngine setStringParam:[self.settings getString:SETTING_TOKEN] forKey:SE_PARAMS_KEY_APP_TOKEN_STRING];
+    //【必需配置】识别服务资源信息ResourceId
+    [self.curEngine setStringParam:[self.settings getString:SETTING_RESOURCE_ID] forKey:SE_PARAMS_KEY_RESOURCE_ID_STRING];
+    //【必需配置】协议类型，BigAsr协议需设置为Seed
+    [self.curEngine setIntParam:SEProtocolTypeSeed forKey:SE_PARAMS_KEY_PROTOCOL_TYPE_INT];
+
+    //【可选配置】在线请求的建连与接收超时，一般不需配置使用默认值即可
+    [self.curEngine setIntParam:3000 forKey:SE_PARAMS_KEY_ASR_CONN_TIMEOUT_INT];
+    [self.curEngine setIntParam:5000 forKey:SE_PARAMS_KEY_ASR_RECV_TIMEOUT_INT];
+    
+    //【可选配置】在线请求断连后，重连次数，默认值为0，如果需要开启需要设置大于0的次数
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_ASR_MAX_RETRY_TIMES] forKey:SE_PARAMS_KEY_ASR_MAX_RETRY_TIMES_INT];
+    
+    //【可选配置】音频采样率，默认16000
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_SAMPLE_RATE] forKey:SE_PARAMS_KEY_SAMPLE_RATE_INT];
+    //【可选配置】音频通道数，默认1，可选1或2
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_CHANNEL] forKey:SE_PARAMS_KEY_CHANNEL_NUM_INT];
+    //【可选配置】上传给服务的音频通道数，默认1，可选1或2，一般与SE_PARAMS_KEY_SAMPLE_RATE_INT保持一致即可
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_CHANNEL] forKey:SE_PARAMS_KEY_UP_CHANNEL_NUM_INT];
+
+}
+
+-(void)configStartAsrParams{
+    //【可选配置】是否开启顺滑(DDC)
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_ENABLE_DDC] forKey:SE_PARAMS_KEY_ASR_ENABLE_DDC_BOOL];
+    //【可选配置】是否开启文字转数字(ITN)
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_ENABLE_ITN] forKey:SE_PARAMS_KEY_ASR_ENABLE_ITN_BOOL];
+    //【可选配置】是否开启标点
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_ENABLE_NLU_PUNC] forKey:SE_PARAMS_KEY_ASR_SHOW_PUNC_BOOL];
+    // 【可选配置】直接传递自定义的ASR请求JSON，若使用此参数需自行确保JSON格式正确
+    [self.curEngine setStringParam:[self.settings getString:SETTING_ASR_REQ_PARAMS] forKey:SE_PARAMS_KEY_ASR_REQ_PARAMS_STRING];
+    //【可选配置】用户音频输入最大时长，仅一句话识别场景生效，单位毫秒，默认为 150000ms.
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_VAD_MAX_SPEECH_DURATION] forKey:SE_PARAMS_KEY_VAD_MAX_SPEECH_DURATION_INT];
+    
+    //【可选配置】控制是否返回录音音量，在 APP 需要显示音频波形时可以启用
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_GET_VOLUME] forKey:SE_PARAMS_KEY_ENABLE_GET_VOLUME_BOOL];
+    
+    NSString* recorderType = [self getRecorderType];
+    NSLog(@"录音模式: %@", recorderType);
+    
+    if ([recorderType isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        if (![self.streamRecorder start]) {
+            [self speechEngineNoPermission];
+        }
+    } else if ([recorderType isEqualToString:SE_RECORDER_TYPE_FILE]) {
+        // 使用音频文件识别时，需要设置文件的绝对路径
+        NSString* file_path = [NSString stringWithFormat:@"%@/%@", self.debugPath, @"asr_rec_file.pcm"];
+        NSLog(@"输入的音频文件路径: %@", file_path);
+        // 使用音频文件识别时【必须配置】，否则【无需配置】
+        [self.curEngine setStringParam:file_path forKey:SE_PARAMS_KEY_RECORDER_FILE_STRING];
+    }
+}
+
+- (void)initEngine {
+    NSLog(@"获取设备ID，调试使用");
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+    NSLog(@"获取设备ID成功: %@", self.deviceID);
+    
+    
+    NSLog(@"创建引擎");
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+        if (![self.curEngine createEngineWithDelegate:self]) {
+            NSLog(@"引擎创建失败.");
+            return;
+        }
+    }
+    [self.resultTextView setTextColor:UIColor.blackColor];
+    NSLog(@"SDK 版本号: %@", [self.curEngine getVersion]);
+    
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"当前调试路径: %@", self.debugPath);
+    
+    NSLog(@"配置初始化参数");
+    [self configInitParams];
+
+    
+    NSLog(@"引擎初始化");
+    SEEngineErrorCode ret = [self.curEngine initEngine];
+    if (ret == SENoError) {
+        NSLog(@"初始化成功");
+        [self speechEngineInitSucceeded];
+    } else {
+        NSLog(@"初始化失败，返回值: %d", ret);
+        [self speechEngineInitFailed:ret];
+    }
+}
+
+- (void)uninitEngine {
+    if (self.curEngine != nil) {
+        NSLog(@"引擎析构");
+        [self.curEngine destroyEngine];
+        self.curEngine = nil;
+        NSLog(@"引擎析构完成");
+    }
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.initialEngineButton.enabled = TRUE;
+        self.uninitialEngineButton.enabled = FALSE;
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = FALSE;
+        self.recordButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineInitSucceeded {
+    [self.streamRecorder setSpeechEngine:VIEW_ASR engine:self.curEngine];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.statusTextView setText:@"Ready"];
+        [self setResultText:[NSString stringWithFormat:@"DeviceID: %@", self.deviceID]];
+        self.uninitialEngineButton.enabled = TRUE;
+        self.initialEngineButton.enabled = FALSE;
+        self.startEngineButton.enabled = TRUE;
+        self.recordButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineInitFailed:(int)initStatus {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:[[NSString alloc] initWithFormat:@"Failed to init engine, %d!", initStatus]];
+        self.initialEngineButton.enabled = TRUE;
+        self.uninitialEngineButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineNoPermission {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"No permission!"];
+        self.initialEngineButton.enabled = TRUE;
+        self.uninitialEngineButton.enabled = FALSE;
+    });
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)initEngineBtnClicked:(id)sender {
+    [self initEngine];
+}
+
+- (IBAction)uninitEngineBtnClicked:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self uninitEngine];
+    
+    [self.resultTextView setTextColor:UIColor.grayColor];
+    [self setResultText:@"点击或按住说话后，展示语音识别结果"];
+}
+
+- (IBAction)startEngineBtnClicked:(id)sender {
+    [self setResultText:@""];
+    
+    NSLog(@"配置启动参数");
+    [self configStartAsrParams];
+
+    
+    // Directive：启动引擎前调用SYNC_STOP指令，保证前一次请求结束。
+    NSLog(@"Directive: SEDirectiveSyncStopEngine");
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveSyncStopEngine];
+    if (ret != SENoError) {
+        NSLog(@"Send directive syncstop failed: %d", ret);
+    } else {
+        NSLog(@"启用引擎.");
+        NSLog(@"Directive: SEDirectiveStartEngine");
+        SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+        if (ret == SERecCheckEnvironmentFailed) {
+            [self speechEngineNoPermission];
+        }
+    }
+}
+
+- (IBAction)stopEngineBtnClicked:(id)sender {
+    NSLog(@"关闭引擎");
+    NSLog(@"Directive: SEDirectiveStopEngine");
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+}
+
+- (void)recordTriggered:(UILongPressGestureRecognizer *)longPgr {
+    if (longPgr.state == UIGestureRecognizerStateBegan) {
+        [self setResultText:@""];
+        
+        NSLog(@"配置启动参数");
+        [self configStartAsrParams];
+
+
+        // Directive：启动引擎前调用SYNC_STOP指令，保证前一次请求结束。
+        NSLog(@"Directive: SEDirectiveSyncStopEngine");
+        SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveSyncStopEngine];
+        if (ret != SENoError) {
+            NSLog(@"Send directive syncstop failed: %d", ret);
+        } else {
+            // Directive：启动引擎指令。
+            NSLog(@"Directive: SEDirectiveStartEngine");
+            SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+            if (ret == SERecCheckEnvironmentFailed) {
+                [self speechEngineNoPermission];
+            }
+        }
+    } else if (longPgr.state == UIGestureRecognizerStateEnded) {
+        // Directive：结束音频输入。
+        NSLog(@"Directive: SEDirectiveFinishTalking");
+        [self.curEngine sendDirective:SEDirectiveFinishTalking];
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.streamRecorder stop];
+        }
+    }
+}
+
+#pragma mark - Message Callback
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    switch (type) {
+        case SEEngineStart:
+            // Callback: 引擎启动成功回调
+            NSLog(@"Callback: 引擎启动成功");
+            [self speechEngineStarted];
+            break;
+        case SEEngineStop:
+            // Callback: 引擎关闭回调
+            NSLog(@"Callback: 引擎关闭");
+            [self speechEngineStopped];
+            break;
+        case SEEngineError:
+            // Callback: 错误信息回调
+            NSLog(@"Callback: 错误信息: %@", data);
+            [self speechEngineError:data];
+            break;
+        case SEConnectionConnected:
+            NSLog(@"Callback: 建连成功");
+            break;
+        case SEAsrPartialResult:
+            // Callback: ASR 当前请求的部分结果回调
+            NSLog(@"Callback: ASR 当前请求的部分结果");
+            [self speechEngineResult:data isFinal:FALSE];
+            break;
+        case SEFinalResult:
+            // Callback: ASR 当前请求最终结果回调
+            NSLog(@"Callback: ASR 当前请求最终结果");
+            [self speechEngineResult:data isFinal:TRUE];
+            break;
+        case SEVolumeLevel:
+            // Callback: 录音音量回调
+            NSLog(@"Callback: 录音音量，%.3f", [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] floatValue]);
+            break;
+        default:
+            break;
+    }
+}
+
+- (void)speechEngineStarted {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.engineStarted = true;
+        [self.statusTextView setText:@"Engine Started!"];
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = TRUE;
+        self.recordButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineStopped {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.streamRecorder stop];
+        }
+        self.engineStarted = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+        self.startEngineButton.enabled = TRUE;
+        self.stopEngineButton.enabled = FALSE;
+        self.recordButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineResult:(NSData *)data isFinal:(BOOL)isFinal {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        // 展示 ASR 结果
+        NSString* dataStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
+        [self setResultText:[NSString stringWithFormat:@"result: %@", dataStr]];
+    });
+}
+
+- (void)speechEngineError:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        // 展示 Error 结果
+        NSString* errorStr = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
+        [self setResultText:[NSString stringWithFormat:@"error: %@", errorStr]];
+    });
+}
+
+#pragma mark - Helper
+
+- (NSString *)getRecorderType {
+    SettingOptions* recorderTypeOptions = [self.settings getOptions:SETTING_RECORD_TYPE];
+    switch (recorderTypeOptions.chooseIdx) {
+        case 0:
+            return SE_RECORDER_TYPE_RECORDER;
+        case 1:
+            return SE_RECORDER_TYPE_FILE;
+        case 2:
+            return SE_RECORDER_TYPE_STREAM;
+        default:
+            break;
+    }
+    return @"";
+}
+
+- (void)setResultText:(NSString *)result {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[result stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+    });
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_BIGASR forKey:@"viewId"];
+}
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/CMakeLists.txt

@@ -0,0 +1,84 @@
+cmake_minimum_required(VERSION 3.1)
+
+project(SpeechDemo)
+
+set(DEVELOPMENT_PROJECT_NAME ${CMAKE_PROJECT_NAME})
+set(APP_NAME ${CMAKE_PROJECT_NAME})
+set(APP_BUNDLE_IDENTIFIER "com.bytedance.ailab.speech.sdk")
+set(DEPLOYMENT_TARGET 10.0)
+set(APP_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
+
+set(CMAKE_OSX_SYSROOT "iphoneos")
+set(CMAKE_XCODE_EFFECTIVE_PLATFORMS "-iphoneos;-iphonesimulator")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
+set(CMAKE_SUPPRESS_REGENERATION true)
+
+set(CMAKE_IPHONEOS_SYSROOT "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk")
+set(CMAKE_IPHONESIMULATOR_SYSROOT "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk")
+set(XCODE_STARTUP_TARGET "SpeechDemo")
+macro(ADD_FRAMEWORK fwname appname)
+    find_library(FRAMEWORK_${fwname}
+        NAMES ${fwname}
+        PATHS ${CMAKE_IPHONESIMULATOR_SYSROOT}/System/Library ${CMAKE_IPHONEOS_SYSROOT}/System/Library
+        PATH_SUFFIXES Frameworks
+        NO_DEFAULT_PATH)
+    if( ${FRAMEWORK_${fwname}} STREQUAL FRAMEWORK_${fwname}-NOTFOUND)
+        MESSAGE(ERROR ": Framework ${fwname} not found")
+    else()
+        TARGET_LINK_LIBRARIES(${appname} ${FRAMEWORK_${fwname}})
+        MESSAGE(STATUS "Framework ${fwname} found at ${FRAMEWORK_${fwname}}")
+    endif()
+endmacro(ADD_FRAMEWORK)
+
+macro(SET_XCODE_PROPERTY TARGET XCODE_PROPERTY XCODE_VALUE XCODE_RELVERSION)
+  set(XCODE_RELVERSION_I "${XCODE_RELVERSION}")
+  if(XCODE_RELVERSION_I STREQUAL "All")
+    set_property(TARGET ${TARGET} PROPERTY XCODE_ATTRIBUTE_${XCODE_PROPERTY} "${XCODE_VALUE}")
+  else()
+    set_property(TARGET ${TARGET} PROPERTY XCODE_ATTRIBUTE_${XCODE_PROPERTY}[variant=${XCODE_RELVERSION_I}] "${XCODE_VALUE}")
+  endif()
+endmacro(SET_XCODE_PROPERTY)
+
+file(GLOB_RECURSE APP_HEADER_FILES "${APP_SOURCE_DIR}/*.h")
+file(GLOB_RECURSE APP_SOURCE_FILES "${APP_SOURCE_DIR}/*.m")
+set(INTERFACE_BUILDER
+    ${APP_SOURCE_DIR}/SpeechSettingItem.xib
+    ${APP_SOURCE_DIR}/Base.lproj/Main.storyboard
+    ${APP_SOURCE_DIR}/Base.lproj/LaunchScreen.storyboard)
+
+add_executable(
+    ${APP_NAME}
+    MACOSX_BUNDLE
+    ${INTERFACE_BUILDER}
+    ${APP_SOURCE_DIR}/Assets.xcassets
+    ${APP_HEADER_FILES}
+    ${APP_SOURCE_FILES})
+
+set_target_properties(
+    ${APP_NAME}
+    PROPERTIES
+    MACOSX_BUNDLE_INFO_PLIST "${APP_SOURCE_DIR}/Info.plist"
+    XCODE_ATTRIBUTE_CLANG_ENABLE_OBJC_ARC YES
+    RESOURCE "${APP_SOURCE_DIR}/Assets.xcassets;${INTERFACE_BUILDER}")
+
+SET_XCODE_PROPERTY(${APP_NAME} PRODUCT_BUNDLE_IDENTIFIER ${APP_BUNDLE_IDENTIFIER} All)
+SET_XCODE_PROPERTY(${APP_NAME} ASSETCATALOG_COMPILER_APPICON_NAME "AppIcon" All)
+
+ADD_FRAMEWORK(UIKit ${APP_NAME})
+ADD_FRAMEWORK(Foundation ${APP_NAME})
+ADD_FRAMEWORK(CoreFoundation ${APP_NAME})
+ADD_FRAMEWORK(AVFoundation ${APP_NAME})
+ADD_FRAMEWORK(AudioToolBox ${APP_NAME})
+ADD_FRAMEWORK(Accelerate ${APP_NAME})
+ADD_FRAMEWORK(AdSupport ${APP_NAME})
+ADD_FRAMEWORK(CFNetwork ${APP_NAME})
+ADD_FRAMEWORK(CoreGraphics ${APP_NAME})
+ADD_FRAMEWORK(CoreImage ${APP_NAME})
+ADD_FRAMEWORK(CoreTelephony ${APP_NAME})
+ADD_FRAMEWORK(CoreText ${APP_NAME})
+ADD_FRAMEWORK(MobileCoreServices ${APP_NAME})
+ADD_FRAMEWORK(QuartzCore ${APP_NAME})
+ADD_FRAMEWORK(Security ${APP_NAME})
+ADD_FRAMEWORK(SystemConfiguration ${APP_NAME})
+ADD_FRAMEWORK(JavaScriptCore ${APP_NAME})
+    

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/CaptViewController.h

@@ -0,0 +1,13 @@
+//
+//  CaptViewController.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/8.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface CaptViewController : UIViewController
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/CaptViewController.m

@@ -0,0 +1,528 @@
+//
+//  CaptViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/8.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import "CaptViewController.h"
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SensitiveDefines.h"
+
+@interface CaptViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+@property (weak, nonatomic) IBOutlet UITextView *referTextView;
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *engineInitButton;
+@property (weak, nonatomic) IBOutlet UIButton *engineUninitButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *longPressButton;
+
+@property (strong, nonatomic) SpeechEngine *curEngine;
+@property (assign, nonatomic) BOOL engineStarted;
+
+// Device ID: 用于定位线上问题
+@property (nonatomic, strong) NSString *deviceID;
+// 一些用于统计的字段
+@property (nonatomic, assign) long talkingFinisheTimestamp;
+// Debug Path: 用于存放一些 SDK 相关的文件，比如模型、日志等
+@property (strong, nonatomic) NSString *debugPath;
+// APP 层自定义的录音机，在音频来源为 Stream 时使用
+@property (weak, nonatomic) StreamRecorder *streamRecorder;
+
+// settings
+@property (strong, nonatomic) Settings *settings;
+
+@end
+
+@implementation CaptViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    self.engineInitButton.enabled = TRUE;
+    self.engineUninitButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.longPressButton.enabled = FALSE;
+    
+    [self decorateTextView:self.referTextView];
+    [self decorateTextView:self.resultTextView];
+    [self.referTextView setDelegate:self];
+    self.referTextView.editable = TRUE;
+    [self.statusTextView setText:@"Waiting for init."];
+    
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    UILongPressGestureRecognizer *longPgr = [[UILongPressGestureRecognizer alloc] initWithTarget:self
+                                                                                          action:@selector(recordTriggered:)];
+    longPgr.minimumPressDuration = 0.5;
+    [self.longPressButton addGestureRecognizer:longPgr];
+    
+    self.streamRecorder = [ViewController getStreamRecorder];
+    self.engineStarted = FALSE;
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_CAPT];
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self uninitEngine];
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+#pragma mark - Config & Init & Uninit Methods
+
+-(void)configInitParams{
+    //【必需配置】Engine Name
+    [self.curEngine setStringParam:SE_CAPT_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+    //【可选配置】Debug & Log
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.curEngine setStringParam:SE_LOG_LEVEL_DEBUG forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+    //【可选配置】UID: 用于定位线上问题
+    [self.curEngine setStringParam:SDEF_UID forKey:SE_PARAMS_KEY_UID_STRING];
+    
+    //【必需配置】配置音频来源
+    [self.curEngine setStringParam:[self getRecorderType] forKey:SE_PARAMS_KEY_RECORDER_TYPE_STRING];
+    
+    if ([self.settings getBool:SETTING_CAPT_RECORDER_SAVE]) {
+        //【可选配置】录音文件保存路径，如配置，SDK会将录音保存到该路径下，文件格式为 .wav
+        [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_CAPT_REC_PATH_STRING];
+    }
+    
+    // 当音频来源为 RECORDER_TYPE_STREAM 时，如输入音频采样率不等于 16K，需添加如下配置
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        if ([self.streamRecorder getSampleRate] != 16000) {
+            // 当音频来源为 RECORDER_TYPE_STREAM 时【必需配置】，否则【无需配置】
+            // 启用 SDK 内部的重采样
+            [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ENABLE_RESAMPLER_BOOL];
+            // 将重采样所需的输入采样率设置为 APP 层输入的音频的实际采样率
+            [self.curEngine setIntParam:[self.streamRecorder getSampleRate] forKey:SE_PARAMS_KEY_CUSTOM_SAMPLE_RATE_INT];
+        }
+    }
+    
+    //【必需配置】鉴权相关：Appid
+    NSString* appID = [self.settings getString:SETTING_APPID];
+    [self.curEngine setStringParam:appID.length <= 0 ? SDEF_APPID : appID forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    //【必需配置】鉴权相关：Token
+    NSString* token = [self.settings getString:SETTING_TOKEN];
+    [self.curEngine setStringParam:token.length <= 0 ? SDEF_TOKEN : token forKey:SE_PARAMS_KEY_APP_TOKEN_STRING];
+
+    NSString *address = [self.settings getString:SETTING_ADDRESS];
+    if (!address.length) {
+        address = SDEF_DEFAULT_ADDRESS;
+    }
+    NSLog(@"Current address: %@", address);
+    //【必需配置】评测服务域名
+    [self.curEngine setStringParam:address forKey:SE_PARAMS_KEY_CAPT_ADDRESS_STRING];
+    NSString *uri = [self.settings getString:SETTING_URI];
+    if (!uri.length) {
+        uri = SDEF_CAPT_DEFAULT_MDD_URI;
+    }
+    NSLog(@"Current uri: %@", uri);
+    //【必需配置】评测服务Uri
+    [self.curEngine setStringParam:uri forKey:SE_PARAMS_KEY_CAPT_URI_STRING];
+    NSString* cluster = [self.settings getString:SETTING_CLUSTER];
+    if (!cluster.length) {
+        cluster = SDEF_CAPT_DEFAULT_CLUSTER;
+    }
+    NSLog(@"Current cluster: %@", cluster);
+    //【必需配置】评测服务所用集群
+    [self.curEngine setStringParam:cluster forKey:SE_PARAMS_KEY_CAPT_CLUSTER_STRING];
+    
+    //【可选配置】在线请求的建连与接收超时，一般不需配置使用默认值即可
+    [self.curEngine setIntParam:12000 forKey:SE_PARAMS_KEY_CAPT_CONN_TIMEOUT_INT];
+    [self.curEngine setIntParam:8000 forKey:SE_PARAMS_KEY_CAPT_RECV_TIMEOUT_INT];
+}
+
+-(void)configStartParams{
+    NSString* text = self.referTextView.text;
+    if (text.length < 1) {
+        text = @"Write down the reference text here";
+    }
+    //【必需配置】评测参考文本
+    [self.curEngine setStringParam:text forKey:SE_PARAMS_KEY_CAPT_REFER_TEXT_STRING];
+
+    
+    //【可选配置】默认为英文打分，如果需要中文需要设置为SE_CAPT_CORE_TYPE_CN_SENT_RAW
+    [self.curEngine setStringParam:[self getCoreType] forKey:SE_PARAMS_KEY_CAPT_CORE_TYPE_STRING];
+    
+    NSInteger difficultyLevel = [self.settings getInt:SETTING_CAPT_DIFFICULTY_LEVEL];
+    //【可选配置】评测难度，默认2，1：容易，2：中等，3：困难
+    [self.curEngine setIntParam:difficultyLevel forKey:SE_PARAMS_KEY_CAPT_DIFFICULTY_INT];
+    
+    NSString *responseMode = SE_CAPT_RESPONSE_MODE_ONCE;
+    if ([self.settings getBool:SETTING_CAPT_STREAMING_MODE]) {
+        responseMode = SE_CAPT_RESPONSE_MODE_STREAMING;
+    }
+    //【可选配置】控制评测结果返回形式，默认是SE_CAPT_RESPONSE_MODE_ONCE单次返回，如果需要流式返回请设置为SE_CAPT_RESPONSE_MODE_STREAMING
+    [self.curEngine setStringParam:responseMode forKey:SE_PARAMS_KEY_CAPT_RESPONSE_MODE_STRING];
+    
+    //【可选配置】是否启用云端自动判停
+    [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_CAPT_AUTO_STOP_BOOL];
+    
+    //【可选配置】控制是否返回录音音量，在 APP 需要显示音频波形时可以启用
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_GET_VOLUME]
+                          forKey:SE_PARAMS_KEY_ENABLE_GET_VOLUME_BOOL];
+    //【可选配置】用户音频输入最大时长，单位毫秒，默认为 150000ms.
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_VAD_MAX_SPEECH_DURATION] forKey:SE_PARAMS_KEY_VAD_MAX_SPEECH_DURATION_INT];
+    
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        if (![self.streamRecorder start]) {
+            [self speechEngineNoPermission];
+        }
+    } else if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_FILE]) {
+        // 使用音频文件评测时，需要设置文件的绝对路径
+        NSString* file_path = [NSString stringWithFormat:@"%@/%@", self.debugPath, @"capt_rec_file.pcm"];
+        NSLog(@"输入的音频文件路径: %@", file_path);
+        // 使用音频文件评测时【必须配置】，否则【无需配置】
+        [self.curEngine setStringParam:file_path forKey:SE_PARAMS_KEY_RECORDER_FILE_STRING];
+    }
+}
+
+#pragma mark - Init Methods
+
+- (void)initEngine {
+    NSLog(@"获取设备ID，调试使用");
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+    NSLog(@"获取设备ID成功: %@", self.deviceID);
+    
+
+    NSLog(@"创建引擎");
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+    }
+    if (![self.curEngine createEngineWithDelegate:self]) {
+        NSLog(@"引擎创建失败.");
+        return;
+    }
+
+    [self.resultTextView setTextColor:UIColor.blackColor];
+    NSLog(@"SDK 版本号: %@", [self.curEngine getVersion]);
+    
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"当前调试路径: %@", self.debugPath);
+    
+    NSLog(@"配置初始化参数");
+    [self configInitParams];
+    
+    NSLog(@"引擎初始化");
+    SEEngineErrorCode ret = [self.curEngine initEngine];
+    if (ret == SENoError) {
+        NSLog(@"初始化成功");
+        [self speechEngineInitSucceeded];
+    } else {
+        NSLog(@"初始化失败，返回值: %d", ret);
+        [self speechEngineInitFailed];
+    }
+}
+
+- (NSString *)getRecorderType {
+    switch ([self.settings getOptions:SETTING_RECORD_TYPE].chooseIdx) {
+        case 0:
+            return SE_RECORDER_TYPE_RECORDER;
+        case 1:
+            return SE_RECORDER_TYPE_FILE;
+        case 2:
+            return SE_RECORDER_TYPE_STREAM;
+        default:
+            break;
+    }
+    return @"";
+}
+
+- (NSString *)getCoreType {
+    switch ([self.settings getOptions:SETTING_CAPT_CORE_TYPE].chooseIdx) {
+        case 0:
+            return SE_CAPT_CORE_TYPE_EN_SENT_SCORE;
+        case 1:
+            return SE_CAPT_CORE_TYPE_EN_WORD_SCORE;
+        case 2:
+            return SE_CAPT_CORE_TYPE_EN_WORD_PRON;
+        case 3:
+            return SE_CAPT_CORE_TYPE_CN_SENT_RAW;
+        default:
+            break;
+    }
+    return @"";
+}
+
+- (void)uninitEngine {
+    [self.curEngine destroyEngine];
+    self.curEngine = nil;
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)initEngineBtnClicked:(id)sender {
+    [self initEngine];
+}
+
+- (IBAction)uninitEngineBtnClicked:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self uninitEngine];
+    [self.statusTextView setText:@"Waiting for init."];
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.longPressButton.enabled = FALSE;
+    self.engineInitButton.enabled = TRUE;
+    self.engineUninitButton = FALSE;
+}
+
+- (IBAction)startEngineBtnClicked:(id)sender {
+    [self setResultText:@""];
+    
+    NSLog(@"配置启动参数");
+    [self configStartParams];
+
+    //【可选配置】是否启用云端自动判停
+    NSLog(@"开启 CAPT 云端自动判停");
+    [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_CAPT_AUTO_STOP_BOOL];
+    
+    // Directive：启动引擎前调用SYNC_STOP指令，保证前一次请求结束。
+    NSLog(@"Directive: SEDirectiveSyncStopEngine");
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveSyncStopEngine];
+    if (ret != SENoError) {
+        NSLog(@"Send directive syncstop failed: %d", ret);
+    } else {
+        NSLog(@"启用引擎.");
+        NSLog(@"Directive: SEDirectiveStartEngine");
+        SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+        if (ret == SERecCheckEnvironmentFailed) {
+            [self speechEngineNoPermission];
+        }
+    }
+}
+
+- (IBAction)stopEngineBtnClicked:(id)sender {
+    NSLog(@"关闭引擎");
+    NSLog(@"Directive: SEDirectiveStopEngine");
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+}
+
+- (void)recordTriggered:(UILongPressGestureRecognizer *)longPgr {
+    if (longPgr.state == UIGestureRecognizerStateBegan) {
+        [self setResultText:@""];
+        
+        NSLog(@"配置启动参数");
+        [self configStartParams];
+        
+        //【可选配置】是否启用云端自动判停
+        NSLog(@"关闭 CAPT 云端自动判停");
+        [self.curEngine setBoolParam:FALSE forKey:SE_PARAMS_KEY_CAPT_AUTO_STOP_BOOL];
+        
+        // Directive：启动引擎前调用SYNC_STOP指令，保证前一次请求结束。
+        NSLog(@"Directive: SEDirectiveSyncStopEngine");
+        SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveSyncStopEngine];
+        if (ret != SENoError) {
+            NSLog(@"Send directive syncstop failed: %d", ret);
+        } else {
+            // Directive：启动引擎指令。
+            NSLog(@"Directive: SEDirectiveStartEngine");
+            SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+            if (ret == SERecCheckEnvironmentFailed) {
+                [self speechEngineNoPermission];
+            }
+        }
+    } else if (longPgr.state == UIGestureRecognizerStateEnded) {
+        self.talkingFinisheTimestamp = [[NSDate date] timeIntervalSince1970] * 1000;
+        // Directive：结束音频输入。
+        NSLog(@"Directive: SEDirectiveFinishTalking");
+        [self.curEngine sendDirective:SEDirectiveFinishTalking];
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.streamRecorder stop];
+        }
+    }
+}
+
+#pragma mark - SpeechEngineDelegate
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    switch (type) {
+        case SEEngineStart:
+            // Callback: 引擎启动成功回调
+            NSLog(@"Callback: 引擎启动成功");
+            [self speechEngineStarted];
+            break;
+        case SEEngineStop:
+            // Callback: 引擎关闭回调
+            NSLog(@"Callback: 引擎关闭");
+            [self speechEngineStopped];
+            break;
+        case SEEngineError:
+            // Callback: 错误信息回调
+            NSLog(@"Callback: 错误信息: %@", data);
+            [self speechEngineError:data];
+            break;
+        case SEAsrPartialResult:
+            // Callback: Capt 当前请求的部分结果回调，只有设置SE_PARAMS_KEY_CAPT_RESPONSE_MODE_STRING为SE_CAPT_RESPONSE_MODE_STREAMING时才会回调该消息
+            NSLog(@"Callback: Capt 当前请求的部分结果");
+            break;
+        case SEFinalResult:
+            // Callback: Capt 最终评测结果回调
+            NSLog(@"Callback: Capt 最终评测结果");
+            [self speechEngineResult:data];
+            break;
+        case SEVolumeLevel:
+            // Callback: 录音音量回调
+            NSLog(@"Callback: 录音音量");
+            break;
+        default:
+            break;
+    }
+}
+
+#pragma mark - Engine Callback
+
+- (void)speechEngineNoPermission {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"No permission!"];
+        self.engineUninitButton.enabled = TRUE;
+        self.engineInitButton.enabled = FALSE;
+        self.startEngineButton.enabled = TRUE;
+        self.longPressButton.enabled = TRUE;
+        self.referTextView.editable = TRUE;
+        self.startEngineButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineInitSucceeded {
+    [self.streamRecorder setSpeechEngine:self.curEngine];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.statusTextView setText:@"Ready"];
+        [self.resultTextView setText:[NSString stringWithFormat:@"DeviceID: %@", self.deviceID]];
+        self.engineUninitButton.enabled = TRUE;
+        self.engineInitButton.enabled = FALSE;
+        self.startEngineButton.enabled = TRUE;
+        self.longPressButton.enabled = TRUE;
+        self.referTextView.editable = TRUE;
+        self.startEngineButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineInitFailed {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"Failed to init engine!"];
+        self.engineInitButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineStarted {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.engineStarted = true;
+        [self.statusTextView setText:@"Engine Started!"];
+        self.referTextView.editable = FALSE;
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = TRUE;
+        self.longPressButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineStopped {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if ([self getRecorderType] == SE_RECORDER_TYPE_STREAM) {
+            [self.streamRecorder stop];
+        }
+        self.engineStarted = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+        self.referTextView.editable = TRUE;
+        self.startEngineButton.enabled = TRUE;
+        self.stopEngineButton.enabled = FALSE;
+        self.longPressButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineResult:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        long response_delay = 0;
+        if (self.talkingFinisheTimestamp > 0) {
+            response_delay = [self timeDelayFrom:self.talkingFinisheTimestamp];
+            self.talkingFinisheTimestamp = 0;
+        }
+        NSError *error;
+        NSDictionary *jsonResult = [NSJSONSerialization JSONObjectWithData:data
+                                                                   options:NSJSONReadingMutableContainers
+                                                                     error:&error];
+        NSMutableString *text = [[NSMutableString alloc] initWithString:@""];
+        NSDictionary *scores = [jsonResult objectForKey:@"scores"];
+        NSArray *integrity = [jsonResult objectForKey:@"integrity_details"];
+        if (scores && scores != (id)[NSNull null] && integrity && integrity != (id)[NSNull null]) {
+            [text appendFormat:@"response_delay: %ld", response_delay];
+            [text appendFormat:@"\nreqid: %@", [jsonResult objectForKey:@"reqid"]];
+            [text appendFormat:@"\nscores: %@", [scores description]];
+            [text appendFormat:@"\nintegrity_details: %@", [integrity description]];
+        }
+        
+        NSString *res_text = [NSString stringWithCString:[text cStringUsingEncoding:NSUTF8StringEncoding] encoding:NSNonLossyASCIIStringEncoding];
+        if (res_text.length) {
+            [self.resultTextView setText:[res_text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+        }
+    });
+}
+
+- (void)speechEngineError:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        // 从回调的 json 数据中解析错误码和错误详细信息
+        [self.resultTextView setText:[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]];
+        [self stopEngineBtnClicked:nil];
+    });
+}
+
+- (void)setResultText:(NSString *)result {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[result stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+    });
+}
+
+#pragma mark - Helper
+
+- (long)timeDelayFrom:(long)pastTimestamp {
+    return [[NSDate date] timeIntervalSince1970] * 1000 - pastTimestamp;
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_CAPT forKey:@"viewId"];
+}
+
+@end
+
+

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/DialogDelegateViewController.h

@@ -0,0 +1,17 @@
+//
+//  DialogDelegateViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2025/3/27.
+//  Copyright © 2025 bytedance. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface DialogDelegateViewController : UIViewController
+
+@end
+
+NS_ASSUME_NONNULL_END

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/DialogDelegateViewController.m

@@ -0,0 +1,549 @@
+//
+//  DialogDelegateViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2025/3/27.
+//  Copyright © 2025 bytedance. All rights reserved.
+//
+
+#import "DialogDelegateViewController.h"
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SensitiveDefines.h"
+#import "utils/DialogMessage.h"
+
+#pragma mark - DialogDelegateViewController
+@interface DialogDelegateViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+// UI
+@property (weak, nonatomic) IBOutlet UIButton *initialEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *uninitialEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *chatTtsTextButton;
+@property (weak, nonatomic) IBOutlet UIButton *useServerTriggerTtsButton;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextView *referTextView;
+@property (strong, nonatomic) NSMutableArray *dialogMessages;
+
+// Debug
+@property (nonatomic, strong) NSString *deviceID;
+@property (strong, nonatomic) NSString *debugPath;
+
+// Speech Engine
+@property (strong, nonatomic) SpeechEngine *speechEngine;
+@property (assign, nonatomic) BOOL engineStarted;
+
+// Settings
+@property (strong, nonatomic) Settings *settings;
+
+@end
+
+@implementation DialogDelegateViewController
+
+static const int MAX_DIALOG_MESSAGE_COUNT = 20;
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+
+    self.initialEngineButton.enabled = TRUE;
+    self.uninitialEngineButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.chatTtsTextButton.enabled = FALSE;
+    self.useServerTriggerTtsButton.enabled = FALSE;
+
+    [self.statusTextView setText:@"Waiting for init."];
+    [self decorateTextView:self.resultTextView];
+
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+
+    self.engineStarted = FALSE;
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_DIALOG_DELEGATE];
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self uninitEngine];
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateView:(UIView *)view {
+    view.layer.cornerRadius = 5.0f;
+    view.layer.borderWidth = .25f;
+    view.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+#pragma mark - Config & Init & Uninit Methods
+
+- (void)configInitParams {
+    //【必需配置】Engine Name
+    [self.speechEngine setStringParam:SE_DIALOG_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+
+    //【可选配置】Debug & Log
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"Debug path: %@", self.debugPath);
+    [self.speechEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.speechEngine setStringParam:SE_LOG_LEVEL_TRACE forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+
+    //【必需配置】Authentication：AppId
+    [self.speechEngine setStringParam:[self.settings getString:SETTING_APPID] forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    //【必需配置】Authentication：AppKey
+    [self.speechEngine setStringParam:[self.settings getString:SETTING_APPKEY] forKey:SE_PARAMS_KEY_APP_KEY_STRING];
+    //【必需配置】Authentication：Token
+    [self.speechEngine setStringParam:[self.settings getString:SETTING_TOKEN] forKey:SE_PARAMS_KEY_APP_TOKEN_STRING];
+    //【必需配置】对话服务资源信息ResourceId
+    [self.speechEngine setStringParam:[self.settings getString:SETTING_RESOURCE_ID] forKey:SE_PARAMS_KEY_RESOURCE_ID_STRING];
+    //【必需配置】User ID（用以辅助定位线上用户问题，如无法提供可提供固定字符串）
+    [self.speechEngine setStringParam:SDEF_UID forKey:SE_PARAMS_KEY_UID_STRING];
+    //【必需配置】Dialog Address，对话服务域名
+    [self.speechEngine setStringParam:[self.settings getString:SETTING_ADDRESS] forKey:SE_PARAMS_KEY_DIALOG_ADDRESS_STRING];
+    //【必需配置】Dialog Uri，对话服务Uri
+    [self.speechEngine setStringParam:[self.settings getString:SETTING_URI] forKey:SE_PARAMS_KEY_DIALOG_URI_STRING];
+    //【可选配置】是否开启AEC，默认不开启，同时启用设备录音和播放时必须开启
+    [self.speechEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ENABLE_AEC_BOOL];
+    //【可选配置】AEC模型路径，开启AEC时必填
+    NSString* aecModelPath = [NSString stringWithFormat:@"%@/aec.model", self.debugPath];
+    [self.speechEngine setStringParam:aecModelPath forKey:SE_PARAMS_KEY_AEC_MODEL_PATH_STRING];
+    //【可选配置】配置音频来源，默认使用设备麦克风录音（Dialog 仅支持 RECORDER 和 STREAM 模式，RECORDER表示设备麦克风录音，STREAM表示自定义音频输入）
+    [self.speechEngine setStringParam:SE_RECORDER_TYPE_RECORDER forKey:SE_PARAMS_KEY_RECORDER_TYPE_STRING];
+    //【可选配置】是否开启播放器，默认开启
+    [self.speechEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_DIALOG_ENABLE_PLAYER_BOOL];
+    //【可选配置】启用录音机音频回调，默认不启用
+    [self.speechEngine setBoolParam:FALSE forKey:SE_PARAMS_KEY_DIALOG_ENABLE_RECORDER_AUDIO_CALLBACK_BOOL];
+    //【可选配置】启用播放器音频回调，默认不启用（为当前正在播放的音频数据，会随着播放进度回调）
+    [self.speechEngine setBoolParam:FALSE forKey:SE_PARAMS_KEY_DIALOG_ENABLE_PLAYER_AUDIO_CALLBACK_BOOL];
+    //【可选配置】启用解码后原始音频回调，默认不启用（为解码后的需要播报的数据，会在解码完成后立刻回调，不等待播放进度）
+    [self.speechEngine setBoolParam:FALSE forKey:SE_PARAMS_KEY_DIALOG_ENABLE_DECODER_AUDIO_CALLBACK_BOOL];
+    //【可选配置】自定义请求Header
+    [self.speechEngine setStringParam:[self.settings getString:SETTING_REQUEST_HEADERS] forKey:SE_PARAMS_KEY_REQUEST_HEADERS_STRING];
+    //【可选配置】录音文件保存路径，如不为空，则SDK会将录音机音频保存到该路径下，文件格式为 .wav
+    if ([self.settings getBool:SETTING_DIALOG_ENABLE_RECORDER_DUMP]) {
+        [self.speechEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DIALOG_RECORDER_PATH_STRING];
+    } else {
+        [self.speechEngine setStringParam:@"" forKey:SE_PARAMS_KEY_DIALOG_RECORDER_PATH_STRING];
+    }
+    //【可选配置】播放文件保存路径，如不为空，则SDK会将播放器音频保存到该路径下，文件格式为 .wav
+    if ([self.settings getBool:SETTING_DIALOG_ENABLE_PLAYER_DUMP]) {
+        [self.speechEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DIALOG_PLAYER_PATH_STRING];
+    } else {
+        [self.speechEngine setStringParam:@"" forKey:SE_PARAMS_KEY_DIALOG_PLAYER_PATH_STRING];
+    }
+    // 【可选配置】启用TTS文本委托，默认不启用
+    [self.speechEngine setIntParam:SEDialogWorkModeDelegateChatTtsText forKey:SE_PARAMS_KEY_DIALOG_WORK_MODE_INT];
+}
+
+- (void)initEngine {
+    NSLog(@"获取设备ID，调试使用");
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+    NSLog(@"获取设备ID成功: %@", self.deviceID);
+
+    NSLog(@"创建引擎");
+    if (self.speechEngine == nil) {
+        self.speechEngine = [[SpeechEngine alloc] init];
+        if (![self.speechEngine createEngineWithDelegate:self]) {
+            NSLog(@"Create speech engine failed.");
+            return;
+        }
+    }
+    NSLog(@"Engine version: %@", [self.speechEngine getVersion]);
+    
+    NSLog(@"配置初始化参数");
+    [self configInitParams];
+
+    NSLog(@"引擎初始化");
+    SEEngineErrorCode ret = [self.speechEngine initEngine];
+    if (ret != SENoError) {
+        NSLog(@"Init Engine failed: %d", ret);
+        [self speechEngineInitFailed];
+        return;
+    }
+
+    [self speechEngineInitOk];
+}
+
+- (void)uninitEngine {
+    if (self.speechEngine) {
+        NSLog(@"引擎析构");
+        [self.speechEngine destroyEngine];
+        self.speechEngine = nil;
+        NSLog(@"引擎析构完成");
+    }
+    [self.statusTextView setText:@"Engine uninited!"];
+}
+
+- (void)sayHello {
+    // Directive：发送say_hello指令以播放开场白。
+    NSString* sayHelloJson = [NSString stringWithFormat: @"{\"content\": \"%@\"}", self.referTextView.text];
+    SEEngineErrorCode ret = [self.speechEngine sendDirective:SEDirectiveEventSayHello data:sayHelloJson];
+    if (ret != SENoError) {
+        [self.statusTextView setText:[NSString stringWithFormat: @"开场白触发失败: %d", ret]];
+    } else {
+        // Directive：发送UseClientTriggerTts指令以播放客户端指定的TTS回复。
+        ret = [self.speechEngine sendDirective:SEDirectiveDialogUseClientTriggerTts];
+        if (ret != SENoError) {
+            [self.statusTextView setText:[NSString stringWithFormat: @"播放客户端指定的TTS回复失败: %d", ret]];
+        } else {
+            [self showHelloMessage:self.referTextView.text];
+        }
+    }
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)initEngineBtnClicked:(id)sender {
+    [self initEngine];
+}
+
+- (IBAction)uninitEngineBtnClicked:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self uninitEngine];
+
+    self.initialEngineButton.enabled = TRUE;
+    self.uninitialEngineButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.chatTtsTextButton.enabled = FALSE;
+    self.useServerTriggerTtsButton.enabled = FALSE;
+}
+
+- (IBAction)startEngineBtnClicked:(id)sender {
+    if (self.speechEngine == nil) {
+        [self.statusTextView setText:@"Engine is not initialized!"];
+        return;
+    }
+    // Directive：启动引擎指令。
+    NSLog(@"Directive: SEDirectiveStartEngine");
+    NSString* startJson = [NSString stringWithFormat: @"{\"dialog\":{\"bot_name\":\"%@\"}}", [self.settings getString:SETTING_DIALOG_BOT_NAME]];
+    SEEngineErrorCode ret = [self.speechEngine sendDirective:SEDirectiveStartEngine data:startJson];
+    if (ret == SERecCheckEnvironmentFailed) {
+        [self speechEngineNoPermission];
+    } else if (ret == SENoError) {
+        self.dialogMessages = [[NSMutableArray alloc] init];
+        self.resultTextView.text = @"";
+        // 开场白
+        if (self.referTextView.text.length != 0) {
+            [self sayHello];
+        }
+    } else {
+        [self.statusTextView setText:[NSString stringWithFormat: @"Fail to start engine: %d", ret]];
+    }
+}
+
+- (IBAction)stopEngineBtnClicked:(id)sender {
+    if (self.speechEngine == nil) {
+        [self.statusTextView setText:@"Engine is not initialized!"];
+        return;
+    }
+    // Directive：关闭引擎，停止对话功能。
+    NSLog(@"Directive: SEDirectiveStopEngine");
+    [self.speechEngine sendDirective:SEDirectiveStopEngine];
+}
+
+- (IBAction)chatTtsTextBtnClicked:(id)sender {
+    if (self.speechEngine == nil) {
+        [self.statusTextView setText:@"Engine is not initialized!"];
+        return;
+    }
+    NSString* chatTtsText = self.referTextView.text;
+    // Directive：发送ChatTtsText指令以播放自定义回复文本，可以流式不断补充文本内容。首包需要包含start:true，end:false 。
+    NSString* chatTtsTextJson = [NSString stringWithFormat: @"{\"start\": true, \"content\": \"%@\", \"end\": false}", chatTtsText];
+    SEEngineErrorCode ret = [self.speechEngine sendDirective:SEDirectiveEventChatTtsText data:chatTtsTextJson];
+    if (ret != SENoError) {
+        [self.statusTextView setText:[NSString stringWithFormat: @"自定义TTS回复失败: %d", ret]];
+        return;
+    }
+    // Directive：发送ChatTtsText指令以播放自定义回复文本，可以流式不断补充文本内容。尾包需要包含start:false，end:true 。
+    chatTtsTextJson = @"{\"start\": false, \"content\": \"\", \"end\": true}";
+    ret = [self.speechEngine sendDirective:SEDirectiveEventChatTtsText data:chatTtsTextJson];
+    if (ret != SENoError) {
+        [self.statusTextView setText:[NSString stringWithFormat: @"自定义TTS回复失败: %d", ret]];
+        return;
+    }
+    // Directive：发送UseClientTriggerTts指令以播放客户端指定的TTS回复。
+    ret = [self.speechEngine sendDirective:SEDirectiveDialogUseClientTriggerTts];
+    if (ret != SENoError) {
+        [self.statusTextView setText:[NSString stringWithFormat: @"播放客户端指定的TTS回复失败: %d", ret]];
+        return;
+    }
+    [self updateChatTtsTextMessage:chatTtsText];
+}
+
+- (IBAction)useServerTriggerTtsBtnClicked:(id)sender {
+    if (self.speechEngine == nil) {
+        [self.statusTextView setText:@"Engine is not initialized!"];
+        return;
+    }
+    // Directive：发送UseServerTriggerTts指令以播放服务端自动生成的TTS回复。
+    int ret = [self.speechEngine sendDirective:SEDirectiveDialogUseServerTriggerTts];
+    if (ret != SENoError) {
+        [self.statusTextView setText:[NSString stringWithFormat: @"播放服务端自动生成的TTS回复失败: %d", ret]];
+        return;
+    }
+}
+
+#pragma mark - SpeechEngineDelegate
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    NSString *strData = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
+    switch (type) {
+        case SEEngineStart:
+            // Callback: 引擎启动成功回调
+            NSLog(@"Callback: 引擎启动成功: %d", type);
+            [self speechEngineStarted:strData];
+            break;
+        case SEEngineStop:
+            // Callback: 引擎关闭回调
+            NSLog(@"Callback: 引擎关闭: %d", type);
+            [self speechEngineStopped:strData];
+            break;
+        case SEEngineError:
+            // Callback: 错误信息回调
+            NSLog(@"Callback: 错误信息: %d, data: %@", type, strData);
+            [self showLogMessage:strData];
+            break;
+        case SEDialogASRResponse:
+            [self showUserMessage: data];
+            break;
+        case SEDialogASREnded:
+            [self confirmUserMessage];
+            break;
+        case SEDialogChatResponse:
+            [self showAssistantMessage: data];
+            break;
+        case SEDialogASRInfo:
+        case SEDialogChatEnded:
+            [self confirmAssistantMessage];
+            break;
+        default:
+            break;
+    }
+}
+
+#pragma mark - SpeechEngine Callback
+
+- (void)speechEngineNoPermission {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"No permission!"];
+        self.initialEngineButton.enabled = TRUE;
+        self.uninitialEngineButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineInitOk {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.statusTextView setText:[NSString stringWithFormat:@"DeviceID: %@", self.deviceID]];
+        self.initialEngineButton.enabled = FALSE;
+        self.uninitialEngineButton.enabled = TRUE;
+        self.startEngineButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineInitFailed {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"Failed to init engine!"];
+        self.initialEngineButton.enabled = TRUE;
+        self.uninitialEngineButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineStarted:(NSString *)sessionId {
+    [self showLogMessage: [NSString stringWithFormat:@"Engine start: %@", sessionId]];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.engineStarted = true;
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = TRUE;
+        self.chatTtsTextButton.enabled = TRUE;
+        self.useServerTriggerTtsButton.enabled = TRUE;
+        [self.statusTextView setText:@"Engine Started!"];
+    });
+}
+
+- (void)speechEngineStopped:(NSString *)sessionId {
+    [self showLogMessage: [NSString stringWithFormat:@"Engine stop: %@", sessionId]];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.engineStarted = FALSE;
+        self.startEngineButton.enabled = TRUE;
+        self.stopEngineButton.enabled = FALSE;
+        self.chatTtsTextButton.enabled = FALSE;
+        self.useServerTriggerTtsButton.enabled = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+    });
+}
+
+
+# pragma mark - Helper
+
+- (void)showLogMessage:(NSString *)text {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        DialogMessage* message = [[DialogMessage alloc] init];
+        message.role = ROLE_LOG;
+        message.text = text;
+        message.confirmed = true;
+        [self.dialogMessages addObject:message];
+        [self updateMessageUI];
+    });
+}
+
+- (void)showHelloMessage:(NSString *)helloMessage {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        DialogMessage* message = [[DialogMessage alloc] init];
+        message.role = ROLE_ASSISTANT;
+        message.text = helloMessage;
+        message.confirmed = true;
+        [self.dialogMessages addObject:message];
+        [self updateMessageUI];
+    });
+}
+
+- (void)showUserMessage:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        DialogMessage* message = [self lastUnconfirmedMessage:ROLE_USER];
+        if (message == nil) {
+            message = [[DialogMessage alloc] init];
+            message.role = ROLE_USER;
+            message.confirmed = false;
+            [self.dialogMessages addObject:message];
+        }
+        // 从回调的 json 数据中解析用户说的消息内容
+        NSError *error;
+        NSDictionary *jsonResult = [NSJSONSerialization JSONObjectWithData:data
+                                                                    options:NSJSONReadingMutableContainers
+                                                                        error:&error];
+        message.text = [[[jsonResult objectForKey:@"results"] firstObject] objectForKey:@"text"];
+        [self updateMessageUI];
+    });
+}
+
+- (void)confirmUserMessage {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        DialogMessage* message = [self lastUnconfirmedMessage:ROLE_USER];
+        if (message) {
+            message.confirmed = true;
+        }
+    });
+}
+
+- (void)showAssistantMessage:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        DialogMessage* message = [self lastUnconfirmedMessage:ROLE_ASSISTANT];
+        if (message == nil) {
+            message = [[DialogMessage alloc] init];
+            message.role = ROLE_ASSISTANT;
+            message.text = @"";
+            message.confirmed = false;
+            [self.dialogMessages addObject:message];
+        }
+        // 从回调的 json 数据中解析用户说的消息内容
+        NSError *error;
+        NSDictionary *jsonResult = [NSJSONSerialization JSONObjectWithData:data
+                                                                    options:NSJSONReadingMutableContainers
+                                                                        error:&error];
+        message.text = [message.text stringByAppendingString:[jsonResult objectForKey:@"content"]];
+        [self updateMessageUI];
+    });
+}
+
+- (void)confirmAssistantMessage {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        DialogMessage* message = [self lastUnconfirmedMessage:ROLE_ASSISTANT];
+        if (message) {
+            message.confirmed = true;
+        }
+    });
+}
+
+- (void)updateChatTtsTextMessage:(NSString *)text {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        DialogMessage* message = [self.dialogMessages lastObject];
+        if (message == nil || message.role != ROLE_ASSISTANT) {
+            message = [[DialogMessage alloc] init];
+            message.role = ROLE_ASSISTANT;
+            [self.dialogMessages addObject:message];
+        }
+        message.text = text;
+        message.confirmed = true;
+        [self updateMessageUI];
+    });
+}
+
+- (DialogMessage*)lastUnconfirmedMessage:(Role)role {
+    for (DialogMessage* message in [self.dialogMessages reverseObjectEnumerator]) {
+        if (message.role == role) {
+            if (!message.confirmed) {
+                return message;
+            }
+            break;
+        }
+    }
+    return nil;
+}
+
+- (void)updateMessageUI {
+    if (self.dialogMessages.count > MAX_DIALOG_MESSAGE_COUNT) {
+        [self.dialogMessages removeObjectAtIndex:0];
+    }
+    NSString* results = @"";
+    for (DialogMessage* message in self.dialogMessages) {
+        NSString* role = @"";
+        switch (message.role) {
+            case ROLE_USER:
+                role = @"[USER]:";
+                break;
+            case ROLE_ASSISTANT:
+                role = @"[ASSISTANT]:";
+                break;
+            case ROLE_LOG:
+                role = @"[LOG]:";
+                break;
+        }
+        results = [results stringByAppendingFormat:@"%@%@\n", role, message.text];
+    }
+    [self.resultTextView setText:results];
+    NSRange bottom = NSMakeRange(self.resultTextView.text.length -1, 1);
+    [self.resultTextView scrollRangeToVisible:bottom];
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_DIALOG_DELEGATE forKey:@"viewId"];
+}
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/DialogViewController.h

@@ -0,0 +1,17 @@
+//
+//  DialogViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2025/3/27.
+//  Copyright © 2025 bytedance. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface DialogViewController : UIViewController
+
+@end
+
+NS_ASSUME_NONNULL_END

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/DialogViewController.m

@@ -0,0 +1,512 @@
+//
+//  DialogViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2025/3/27.
+//  Copyright © 2025 bytedance. All rights reserved.
+//
+
+#import "DialogViewController.h"
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SensitiveDefines.h"
+#import "utils/DialogMessage.h"
+
+#pragma mark - DialogViewController
+@interface DialogViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+// UI
+@property (weak, nonatomic) IBOutlet UIButton *initialEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *uninitialEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *chatTextQueryButton;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextView *helloTextView;
+@property (weak, nonatomic) IBOutlet UITextView *queryTextView;
+@property (strong, nonatomic) NSMutableArray *dialogMessages;
+
+// Debug
+@property (nonatomic, strong) NSString *deviceID;
+@property (strong, nonatomic) NSString *debugPath;
+
+// Speech Engine
+@property (strong, nonatomic) SpeechEngine *speechEngine;
+@property (assign, nonatomic) BOOL engineStarted;
+
+// Settings
+@property (strong, nonatomic) Settings *settings;
+
+@end
+
+@implementation DialogViewController
+
+NSString *const AEC_MODEL_NAME = @"aec.model";
+static const int MAX_DIALOG_MESSAGE_COUNT = 20;
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+
+    self.initialEngineButton.enabled = TRUE;
+    self.uninitialEngineButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.chatTextQueryButton.enabled = FALSE;
+
+    [self.statusTextView setText:@"Waiting for init."];
+    [self decorateTextView:self.resultTextView];
+
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+
+    self.engineStarted = FALSE;
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_DIALOG];
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self uninitEngine];
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateView:(UIView *)view {
+    view.layer.cornerRadius = 5.0f;
+    view.layer.borderWidth = .25f;
+    view.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+#pragma mark - Config & Init & Uninit Methods
+
+- (void)configInitParams {
+    //【必需配置】Engine Name
+    [self.speechEngine setStringParam:SE_DIALOG_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+
+    //【可选配置】Debug & Log
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"Debug path: %@", self.debugPath);
+    [self.speechEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.speechEngine setStringParam:SE_LOG_LEVEL_TRACE forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+
+    //【必需配置】Authentication：AppId
+    [self.speechEngine setStringParam:[self.settings getString:SETTING_APPID] forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    //【必需配置】Authentication：AppKey
+    [self.speechEngine setStringParam:[self.settings getString:SETTING_APPKEY] forKey:SE_PARAMS_KEY_APP_KEY_STRING];
+    //【必需配置】Authentication：Token
+    [self.speechEngine setStringParam:[self.settings getString:SETTING_TOKEN] forKey:SE_PARAMS_KEY_APP_TOKEN_STRING];
+    //【必需配置】对话服务资源信息ResourceId
+    [self.speechEngine setStringParam:[self.settings getString:SETTING_RESOURCE_ID] forKey:SE_PARAMS_KEY_RESOURCE_ID_STRING];
+    //【必需配置】User ID（用以辅助定位线上用户问题，如无法提供可提供固定字符串）
+    [self.speechEngine setStringParam:SDEF_UID forKey:SE_PARAMS_KEY_UID_STRING];
+    //【必需配置】Dialog Address，对话服务域名
+    [self.speechEngine setStringParam:[self.settings getString:SETTING_ADDRESS] forKey:SE_PARAMS_KEY_DIALOG_ADDRESS_STRING];
+    //【必需配置】Dialog Uri，对话服务Uri
+    [self.speechEngine setStringParam:[self.settings getString:SETTING_URI] forKey:SE_PARAMS_KEY_DIALOG_URI_STRING];
+    //【可选配置】是否开启AEC，默认不开启，同时启用设备录音和播放时必须开启
+    [self.speechEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ENABLE_AEC_BOOL];
+    //【可选配置】AEC模型路径，开启AEC时必填
+    [self.speechEngine setStringParam:[ViewController extractBundleToFilePath:AEC_MODEL_NAME] forKey:SE_PARAMS_KEY_AEC_MODEL_PATH_STRING];
+    //【可选配置】配置音频来源，默认使用设备麦克风录音（Dialog 仅支持 RECORDER 和 STREAM 模式，RECORDER表示设备麦克风录音，STREAM表示自定义音频输入）
+    [self.speechEngine setStringParam:SE_RECORDER_TYPE_RECORDER forKey:SE_PARAMS_KEY_RECORDER_TYPE_STRING];
+    //【可选配置】是否开启播放器，默认开启
+    [self.speechEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_DIALOG_ENABLE_PLAYER_BOOL];
+    //【可选配置】启用录音机音频回调，默认不启用
+    [self.speechEngine setBoolParam:FALSE forKey:SE_PARAMS_KEY_DIALOG_ENABLE_RECORDER_AUDIO_CALLBACK_BOOL];
+    //【可选配置】启用播放器音频回调，默认不启用（为当前正在播放的音频数据，会随着播放进度回调）
+    [self.speechEngine setBoolParam:FALSE forKey:SE_PARAMS_KEY_DIALOG_ENABLE_PLAYER_AUDIO_CALLBACK_BOOL];
+    //【可选配置】启用解码后原始音频回调，默认不启用（为解码后的需要播报的数据，会在解码完成后立刻回调，不等待播放进度）
+    [self.speechEngine setBoolParam:FALSE forKey:SE_PARAMS_KEY_DIALOG_ENABLE_DECODER_AUDIO_CALLBACK_BOOL];
+    //【可选配置】自定义请求Header
+    [self.speechEngine setStringParam:[self.settings getString:SETTING_REQUEST_HEADERS] forKey:SE_PARAMS_KEY_REQUEST_HEADERS_STRING];
+    //【可选配置】录音文件保存路径，如不为空，则SDK会将录音机音频保存到该路径下，文件格式为 .wav
+    if ([self.settings getBool:SETTING_DIALOG_ENABLE_RECORDER_DUMP]) {
+        [self.speechEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DIALOG_RECORDER_PATH_STRING];
+    } else {
+        [self.speechEngine setStringParam:@"" forKey:SE_PARAMS_KEY_DIALOG_RECORDER_PATH_STRING];
+    }
+    //【可选配置】播放文件保存路径，如不为空，则SDK会将播放器音频保存到该路径下，文件格式为 .wav
+    if ([self.settings getBool:SETTING_DIALOG_ENABLE_PLAYER_DUMP]) {
+        [self.speechEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DIALOG_PLAYER_PATH_STRING];
+    } else {
+        [self.speechEngine setStringParam:@"" forKey:SE_PARAMS_KEY_DIALOG_PLAYER_PATH_STRING];
+    }
+}
+
+- (void)initEngine {
+    NSLog(@"获取设备ID，调试使用");
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+    NSLog(@"获取设备ID成功: %@", self.deviceID);
+
+    NSLog(@"创建引擎");
+    if (self.speechEngine == nil) {
+        self.speechEngine = [[SpeechEngine alloc] init];
+        if (![self.speechEngine createEngineWithDelegate:self]) {
+            NSLog(@"Create speech engine failed.");
+            return;
+        }
+    }
+    NSLog(@"Engine version: %@", [self.speechEngine getVersion]);
+    
+    NSLog(@"配置初始化参数");
+    [self configInitParams];
+
+    NSLog(@"引擎初始化");
+    SEEngineErrorCode ret = [self.speechEngine initEngine];
+    if (ret != SENoError) {
+        NSLog(@"Init Engine failed: %d", ret);
+        [self speechEngineInitFailed];
+        return;
+    }
+
+    [self speechEngineInitOk];
+}
+
+- (void)uninitEngine {
+    if (self.speechEngine) {
+        NSLog(@"引擎析构");
+        [self.speechEngine destroyEngine];
+        self.speechEngine = nil;
+        NSLog(@"引擎析构完成");
+    }
+    [self.statusTextView setText:@"Engine uninited!"];
+}
+
+- (void)sayHello {
+    NSString* sayHelloJson = [NSString stringWithFormat: @"{\"content\": \"%@\"}", self.helloTextView.text];
+    SEEngineErrorCode ret = [self.speechEngine sendDirective:SEDirectiveEventSayHello data:sayHelloJson];
+    if (ret != SENoError) {
+        NSLog(@"Send directive say hello failed: %d", ret);
+    } else {
+        [self showHelloMessage:self.helloTextView.text];
+    }
+}
+
+- (void)chatTextQuery {
+    NSString* chatTextQueryJson = [NSString stringWithFormat: @"{\"content\": \"%@\"}", self.queryTextView.text];
+    SEEngineErrorCode ret = [self.speechEngine sendDirective:SEDirectiveEventChatTextQuery data:chatTextQueryJson];
+    if (ret != SENoError) {
+        NSLog(@"Send directive chat text query failed: %d", ret);
+    } else {
+        [self showChatTextQueryMessage:self.queryTextView.text];
+    }
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)initEngineBtnClicked:(id)sender {
+    [self initEngine];
+}
+
+- (IBAction)uninitEngineBtnClicked:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self uninitEngine];
+
+    self.initialEngineButton.enabled = TRUE;
+    self.uninitialEngineButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.chatTextQueryButton.enabled = FALSE;
+}
+
+- (IBAction)startEngineBtnClicked:(id)sender {
+    if (self.speechEngine == nil) {
+        [self.statusTextView setText:@"Engine is not initialized!"];
+        return;
+    }
+    // Directive：启动引擎指令。
+    NSLog(@"Directive: SEDirectiveStartEngine");
+    NSString* startJson = [NSString stringWithFormat: @"{\"dialog\":{\"bot_name\":\"%@\"}}", [self.settings getString:SETTING_DIALOG_BOT_NAME]];
+    SEEngineErrorCode ret = [self.speechEngine sendDirective:SEDirectiveStartEngine data:startJson];
+    if (ret == SERecCheckEnvironmentFailed) {
+        [self speechEngineNoPermission];
+    } else if (ret == SENoError) {
+        self.dialogMessages = [[NSMutableArray alloc] init];
+        self.resultTextView.text = @"";
+        // 开场白
+        if (self.helloTextView.text.length != 0) {
+            [self sayHello];
+        }
+    } else {
+        [self.statusTextView setText:[NSString stringWithFormat: @"Fail to start engine: %d", ret]];
+    }
+}
+
+- (IBAction)stopEngineBtnClicked:(id)sender {
+    if (self.speechEngine == nil) {
+        [self.statusTextView setText:@"Engine is not initialized!"];
+        return;
+    }
+    NSLog(@"Stop engine.");
+    // Directive：关闭引擎，停止对话功能。
+    NSLog(@"Directive: SEDirectiveStopEngine");
+    [self.speechEngine sendDirective:SEDirectiveStopEngine];
+}
+
+- (IBAction)chatTextQueryBtnClicked:(id)sender {
+    if (self.speechEngine == nil) {
+        [self.statusTextView setText:@"Engine is not initialized!"];
+        return;
+    }
+    [self chatTextQuery];
+}
+
+
+#pragma mark - SpeechEngineDelegate
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    NSString *strData = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
+    switch (type) {
+        case SEEngineStart:
+            // Callback: 引擎启动成功回调
+            NSLog(@"Callback: 引擎启动成功: %d", type);
+            [self speechEngineStarted:strData];
+            break;
+        case SEEngineStop:
+            // Callback: 引擎关闭回调
+            NSLog(@"Callback: 引擎关闭: %d", type);
+            [self speechEngineStopped:strData];
+            break;
+        case SEEngineError:
+            // Callback: 错误信息回调
+            NSLog(@"Callback: 错误信息: %d, data: %@", type, strData);
+            [self showLogMessage:strData];
+            break;
+        case SEDialogASRResponse:
+            [self showUserMessage: data];
+            break;
+        case SEDialogASREnded:
+            [self confirmUserMessage];
+            break;
+        case SEDialogChatResponse:
+            [self showAssistantMessage: data];
+            break;
+        case SEDialogASRInfo:
+        case SEDialogChatEnded:
+            [self confirmAssistantMessage];
+            break;
+        default:
+            break;
+    }
+}
+
+#pragma mark - SpeechEngine Callback
+
+- (void)speechEngineNoPermission {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"No permission!"];
+        self.initialEngineButton.enabled = TRUE;
+        self.uninitialEngineButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineInitOk {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.statusTextView setText:[NSString stringWithFormat:@"DeviceID: %@", self.deviceID]];
+        self.initialEngineButton.enabled = FALSE;
+        self.uninitialEngineButton.enabled = TRUE;
+        self.startEngineButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineInitFailed {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"Failed to init engine!"];
+        self.initialEngineButton.enabled = TRUE;
+        self.uninitialEngineButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineStarted:(NSString *)sessionId {
+    [self showLogMessage: [NSString stringWithFormat:@"Engine start: %@", sessionId]];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.engineStarted = true;
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = TRUE;
+        self.chatTextQueryButton.enabled = TRUE;
+        [self.statusTextView setText:@"Engine Started!"];
+    });
+}
+
+- (void)speechEngineStopped:(NSString *)sessionId {
+    [self showLogMessage: [NSString stringWithFormat:@"Engine stop: %@", sessionId]];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.engineStarted = FALSE;
+        self.startEngineButton.enabled = TRUE;
+        self.stopEngineButton.enabled = FALSE;
+        self.chatTextQueryButton.enabled = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+    });
+}
+
+
+# pragma mark - Helper
+
+- (void)showLogMessage:(NSString *)text {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        DialogMessage* message = [[DialogMessage alloc] init];
+        message.role = ROLE_LOG;
+        message.text = text;
+        message.confirmed = true;
+        [self.dialogMessages addObject:message];
+        [self updateMessageUI];
+    });
+}
+
+- (void)showHelloMessage:(NSString *)helloMessage {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        DialogMessage* message = [[DialogMessage alloc] init];
+        message.role = ROLE_ASSISTANT;
+        message.text = helloMessage;
+        message.confirmed = true;
+        [self.dialogMessages addObject:message];
+        [self updateMessageUI];
+    });
+}
+
+- (void)showChatTextQueryMessage:(NSString *)queryMessage {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self confirmAssistantMessage];
+        DialogMessage* message = [[DialogMessage alloc] init];
+        message.role = ROLE_USER;
+        message.text = queryMessage;
+        message.confirmed = true;
+        [self.dialogMessages addObject:message];
+        [self updateMessageUI];
+    });
+}
+
+- (void)showUserMessage:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        DialogMessage* message = [self lastUnconfirmedMessage:ROLE_USER];
+        if (message == nil) {
+            message = [[DialogMessage alloc] init];
+            message.role = ROLE_USER;
+            message.confirmed = false;
+            [self.dialogMessages addObject:message];
+        }
+        // 从回调的 json 数据中解析用户说的消息内容
+        NSError *error;
+        NSDictionary *jsonResult = [NSJSONSerialization JSONObjectWithData:data
+                                                                    options:NSJSONReadingMutableContainers
+                                                                        error:&error];
+        message.text = [[[jsonResult objectForKey:@"results"] firstObject] objectForKey:@"text"];
+        [self updateMessageUI];
+    });
+}
+
+- (void)confirmUserMessage {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        DialogMessage* message = [self lastUnconfirmedMessage:ROLE_USER];
+        if (message) {
+            message.confirmed = true;
+        }
+    });
+}
+
+- (void)showAssistantMessage:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        DialogMessage* message = [self lastUnconfirmedMessage:ROLE_ASSISTANT];
+        if (message == nil) {
+            message = [[DialogMessage alloc] init];
+            message.role = ROLE_ASSISTANT;
+            message.text = @"";
+            message.confirmed = false;
+            [self.dialogMessages addObject:message];
+        }
+        // 从回调的 json 数据中解析用户说的消息内容
+        NSError *error;
+        NSDictionary *jsonResult = [NSJSONSerialization JSONObjectWithData:data
+                                                                    options:NSJSONReadingMutableContainers
+                                                                        error:&error];
+        message.text = [message.text stringByAppendingString:[jsonResult objectForKey:@"content"]];
+        [self updateMessageUI];
+    });
+}
+
+- (void)confirmAssistantMessage {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        DialogMessage* message = [self lastUnconfirmedMessage:ROLE_ASSISTANT];
+        if (message) {
+            message.confirmed = true;
+        }
+    });
+}
+
+- (DialogMessage*)lastUnconfirmedMessage:(Role)role {
+    for (DialogMessage* message in [self.dialogMessages reverseObjectEnumerator]) {
+        if (message.role == role) {
+            if (!message.confirmed) {
+                return message;
+            }
+            break;
+        }
+    }
+    return nil;
+}
+
+- (void)updateMessageUI {
+    if (self.dialogMessages.count > MAX_DIALOG_MESSAGE_COUNT) {
+        [self.dialogMessages removeObjectAtIndex:0];
+    }
+    NSString* results = @"";
+    for (DialogMessage* message in self.dialogMessages) {
+        NSString* role = @"";
+        switch (message.role) {
+            case ROLE_USER:
+                role = @"[USER]:";
+                break;
+            case ROLE_ASSISTANT:
+                role = @"[ASSISTANT]:";
+                break;
+            case ROLE_LOG:
+                role = @"[LOG]:";
+                break;
+        }
+        results = [results stringByAppendingFormat:@"%@%@\n", role, message.text];
+    }
+    [self.resultTextView setText:results];
+    NSRange bottom = NSMakeRange(self.resultTextView.text.length -1, 1);
+    [self.resultTextView scrollRangeToVisible:bottom];
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_DIALOG forKey:@"viewId"];
+}
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/FulllinkViewController.h

@@ -0,0 +1,13 @@
+//
+//  FulllinkViewController.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/8.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface FulllinkViewController : UIViewController
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/FulllinkViewController.m

@@ -0,0 +1,484 @@
+//
+//  FulllinkViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/8.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import "FulllinkViewController.h"
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SensitiveDefines.h"
+
+@interface FulllinkViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextView *referTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *engineInitButton;
+@property (weak, nonatomic) IBOutlet UIButton *engineUninitButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *longPressButton;
+@property (weak, nonatomic) IBOutlet UIButton *forceWakeupButton;
+@property (weak, nonatomic) IBOutlet UIButton *cancelDialogButton;
+
+@property (strong, nonatomic) SpeechEngine *curEngine;
+@property (assign, nonatomic) BOOL engineStarted;
+
+@property (nonatomic, strong) NSString *deviceID;
+@property (nonatomic, assign) long talkingFinisheTimestamp;
+@property (nonatomic, assign) long startEngineTimestamp;
+@property (strong, nonatomic) NSString *debugPath;
+
+@property (strong, nonatomic) NSArray *engineNameArray;
+@property (assign, nonatomic) NSInteger engineNameType;
+
+@property (weak, nonatomic) StreamRecorder *streamRecorder;
+
+// settings
+@property (strong, nonatomic) Settings *settings;
+@end
+
+@implementation FulllinkViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_FULLLINK];
+    
+    self.engineInitButton.enabled = TRUE;
+    self.engineUninitButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.longPressButton.enabled = FALSE;
+    self.forceWakeupButton.enabled = FALSE;
+    self.cancelDialogButton.enabled = FALSE;
+    [self.statusTextView setText:@"Waiting for init."];
+    [self decorateTextView:self.resultTextView];
+    [self decorateTextView:self.referTextView];
+    [self.referTextView setDelegate:self];
+    self.referTextView.editable = TRUE;
+    self.referTextView.text = @"高兴的反义词";
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    UILongPressGestureRecognizer *longPgr = [[UILongPressGestureRecognizer alloc] initWithTarget:self
+                                                                                          action:@selector(longPressTriggered:)];
+    longPgr.minimumPressDuration = 0.5;
+    [self.longPressButton addGestureRecognizer:longPgr];
+    self.streamRecorder = [ViewController getStreamRecorder];
+    self.engineStarted = FALSE;
+    self.engineNameArray = @[SE_FULLLINK_LITE_ENGINE, SE_FULLLINK_ENGINE];
+    self.engineNameType = 0;
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self uninitEngine];
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+#pragma mark - SpeechEngineDelegate
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    switch (type) {
+        case SEEngineStart:
+            [self speechEngineStarted];
+            break;
+        case SEEngineStop:
+            [self speechEngineStopped];
+            break;
+        case SEEngineError:
+            [self speechEngineError:data];
+            break;
+        case SEWakeupResult:
+            [self speechEngineWakeUp:data];
+            break;
+        case SEAsrPartialResult:
+            [self speechEngineResult:data isFinal:FALSE];
+            break;
+        case SEFinalResult:
+            [self speechEngineResult:data isFinal:TRUE];
+            break;
+        case SENluResult:
+            [self speechEngineNluResult:data];
+            break;
+        case SEVolumeLevel:
+            NSLog(@"volume level: %s", (char*)data.bytes);
+            break;
+        case SEEngineLog:
+            NSLog(@"engine log: %s", (char*)data.bytes);
+            break;
+        default:
+            break;
+    }
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)InitEngine:(id)sender {
+    [self initEngine];
+}
+
+- (IBAction)uninitEngine:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self uninitEngine];
+    [self.resultTextView setTextColor:UIColor.grayColor];
+    [self.resultTextView setText:@"点击或按住说话后，展示语音识别结果"];
+}
+
+- (IBAction)startEngine:(id)sender {
+    NSLog(@"Start engine.");
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_GET_VOLUME]
+                          forKey:SE_PARAMS_KEY_ENABLE_GET_VOLUME_BOOL];
+    NSString* engine_name = [self.engineNameArray objectAtIndex:self.engineNameType];
+    if (engine_name == SE_FULLLINK_LITE_ENGINE) {
+        [self.curEngine setBoolParam:[self.settings getBool:SETTING_FULLLINK_ONLY_ASR] forKey:SE_PARAMS_KEY_FULLLINK_ASR_ONLY_BOOL];
+        [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_FULLLINK_ASR_AUTO_STOP_BOOL];
+    }
+    [self configUserParams];
+
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        [self.curEngine setIntParam:[self.streamRecorder getSampleRate] forKey:SE_PARAMS_KEY_CUSTOM_SAMPLE_RATE_INT];
+        if (![self.streamRecorder start]) {
+            [self speechEngineNoPermission];
+            return;
+        }
+    } else if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_FILE]) {
+        NSString* file_path = [NSString stringWithFormat:@"%@/%@", self.debugPath, @"recorder.pcm"];
+        NSLog(@"test file path: %@", file_path);
+        [self.curEngine setStringParam:file_path forKey:SE_PARAMS_KEY_RECORDER_FILE_STRING];
+    }
+
+    NSInteger ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+    if (ret == SERecCheckEnvironmentFailed) {
+        [self speechEngineNoPermission];
+    }
+}
+
+- (IBAction)stopEngine:(id)sender {
+    NSLog(@"Stop engine.");
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+}
+
+- (IBAction)forceWakeup:(id)sender {
+    NSLog(@"Force wakeup.");
+    NSString* engine_name = [self.engineNameArray objectAtIndex:self.engineNameType];
+    if (engine_name == SE_FULLLINK_ENGINE) {
+        [self.curEngine sendDirective:SEDirectiveTriggerWakeup];
+    }
+}
+
+- (IBAction)cancelDialog:(id)sender {
+    NSLog(@"Force wakeup.");
+    [self.curEngine sendDirective:SEDirectiveCancelCurrentDialog];
+}
+
+- (IBAction)longPressTriggered:(UILongPressGestureRecognizer *)longPgr {
+    [self configUserParams];
+    if (longPgr.state == UIGestureRecognizerStateBegan) {
+        NSLog(@"Long press begin.");
+        [self setResultText:@""];
+        [self.curEngine setBoolParam:[self.settings getBool:SETTING_GET_VOLUME]
+                              forKey:SE_PARAMS_KEY_ENABLE_GET_VOLUME_BOOL];
+        NSString* engine_name = [self.engineNameArray objectAtIndex:self.engineNameType];
+        if (engine_name == SE_FULLLINK_LITE_ENGINE) {
+            [self.curEngine setBoolParam:[self.settings getBool:SETTING_FULLLINK_ONLY_ASR] forKey:SE_PARAMS_KEY_FULLLINK_ASR_ONLY_BOOL];
+        }
+
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.curEngine setIntParam:[self.streamRecorder getSampleRate] forKey:SE_PARAMS_KEY_CUSTOM_SAMPLE_RATE_INT];
+            if (![self.streamRecorder start]) {
+                [self speechEngineNoPermission];
+                return;
+            }
+        } else if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_FILE]) {
+            NSString* file_path = [NSString stringWithFormat:@"%@/%@", self.debugPath, @"recorder.pcm"];
+            NSLog(@"test file path: %@", file_path);
+            [self.curEngine setStringParam:file_path forKey:SE_PARAMS_KEY_RECORDER_FILE_STRING];
+        }
+
+        NSInteger ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+        if (ret == SERecCheckEnvironmentFailed) {
+            [self speechEngineNoPermission];
+        }
+    } else if (longPgr.state == UIGestureRecognizerStateEnded) {
+        NSLog(@"Long press ended.");
+        self.talkingFinisheTimestamp = [[NSDate date] timeIntervalSince1970] * 1000;
+        [self.curEngine sendDirective:SEDirectiveFinishTalking];
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.streamRecorder stop];
+        }
+    }
+}
+
+#pragma mark - Init Methods
+
+- (void)initEngine {
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    if (appDelegate.deviceID.length < 1) {
+        self.engineInitButton.enabled = FALSE;
+        dispatch_async(dispatch_get_main_queue(), ^{
+            [self.statusTextView setText:@"Waiting for get deviceID."];
+            sleep(1);
+            [self initEngine];
+        });
+        return;
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+
+
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+    }
+    if (![self.curEngine createEngineWithDelegate:self]) {
+        NSLog(@"Create speech engine failed.");
+        return;
+    }
+    [self.resultTextView setTextColor:UIColor.blackColor];
+    NSLog(@"Engine version: %@", [self.curEngine getVersion]);
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"Debug path: %@", self.debugPath);
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.curEngine setStringParam:[NSString stringWithFormat:@"%@/%@", self.debugPath, @"kws"] forKey:SE_PARAMS_KEY_KWS_ROOT_PATH_STRING];
+    [self.curEngine setStringParam:[NSString stringWithFormat:@"%@/%@", self.debugPath, @"signal"] forKey:SE_PARAMS_KEY_SIGNAL_ROOT_PATH_STRING];
+
+    [self.curEngine setStringParam:SE_LOG_LEVEL_TRACE forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+    [self.curEngine setStringParam:@"robot_ios" forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    [self.curEngine setStringParam:SDEF_UID forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setIntParam:1 forKey:SE_PARAMS_KEY_CHANNEL_NUM_INT];
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_GET_VOLUME]
+                          forKey:SE_PARAMS_KEY_ENABLE_GET_VOLUME_BOOL];
+    NSString *address = [self.settings getString:SETTING_ADDRESS];
+    if (!address.length) {
+        address = SDEF_DEFAULT_ADDRESS;
+    }
+    NSLog(@"Current address: %@", address);
+    [self.curEngine setStringParam:address forKey:SE_PARAMS_KEY_FULLLINK_ADDRESS_STRING];
+    NSString *uri = [self.settings getString:SETTING_URI];
+    if (!uri.length) {
+        uri = SDEF_FULLLINK_DEFAULT_URI;
+    }
+    NSLog(@"Current uri: %@", uri);
+    [self.curEngine setStringParam:uri forKey:SE_PARAMS_KEY_FULLLINK_URI_STRING];
+    [self.curEngine setStringParam:@"" forKey:SE_PARAMS_KEY_FULLLINK_QUERY_STRING_STRING];
+    [self.curEngine setStringParam:[self getRecorderType] forKey:SE_PARAMS_KEY_RECORDER_TYPE_STRING];
+    self.engineNameType = [self.settings getOptions:SETTING_FULLLINK_ENGINE_TYPE].chooseIdx;
+    [self.curEngine setStringParam:[self.engineNameArray objectAtIndex:self.engineNameType] forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_FULLLINK_ENABLE_RECORDER_DUMP] forKey:@"enable_dump"];
+    
+
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        if ([self.streamRecorder getSampleRate] != 16000) {
+            [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ENABLE_RESAMPLER_BOOL];
+        }
+    }
+
+    NSInteger ret = [self.curEngine initEngine];
+    if (ret != SENoError) {
+        NSLog(@"Init Engine failed: %ld", ret);
+    }
+    if (ret == SENoError) {
+        [self speechEngineInitOk];
+    } else {
+        [self speechEngineInitFailed];
+    }
+}
+
+- (void)configUserParams {
+    NSString *param = @"{\"auth_key\":\"\",\"product_info\":{\"product_id\":2001},\"nlg_request\":{\"nlg_type\":\"\",\"nlg_content\":\"";
+    param = [param stringByAppendingString:self.referTextView.text];
+    param = [param stringByAppendingString:@"\"},\"session_info\":{},\"client_info\":{\"client_user_id\":\"123456\",\"client_device_id\":\"123456\",\"client_app_id\":\"111\",\"client_device_unique_code\":\"111\",\"sdk_version\":0,\"client_app_version\":\"\"}}"];
+    [self.curEngine setStringParam:param forKey:SE_PARAMS_KEY_FULLLINK_USER_PARAM_STRING];
+}
+
+- (NSString *)getRecorderType {
+    switch ([self.settings getOptions:SETTING_RECORD_TYPE].chooseIdx) {
+        case 0:
+            return SE_RECORDER_TYPE_RECORDER;
+        case 1:
+            return SE_RECORDER_TYPE_FILE;
+        case 2:
+            return SE_RECORDER_TYPE_STREAM;
+        default:
+            break;
+    }
+    return @"";
+}
+
+- (void)uninitEngine {
+    [self.curEngine destroyEngine];
+    self.curEngine = nil;
+    self.engineInitButton.enabled = TRUE;
+    self.engineUninitButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.longPressButton.enabled = FALSE;
+    self.forceWakeupButton.enabled = FALSE;
+    self.cancelDialogButton.enabled = FALSE;
+}
+
+#pragma mark - Engine Callback
+
+- (void)speechEngineNoPermission {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"No permission!"];
+        self.engineInitButton.enabled = TRUE;
+        self.engineUninitButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineInitOk {
+    [self.streamRecorder setSpeechEngine:self.curEngine];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.statusTextView setText:@"Ready"];
+        [self.resultTextView setText:[NSString stringWithFormat:@"DeviceID: %@", self.deviceID]];
+        self.engineUninitButton.enabled = TRUE;
+        self.engineInitButton.enabled = FALSE;
+        self.startEngineButton.enabled = TRUE;
+        self.longPressButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineInitFailed {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"Failed to init engine!"];
+        self.engineInitButton.enabled = TRUE;
+        self.engineUninitButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineStarted {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.startEngineTimestamp = [[NSDate date] timeIntervalSince1970] * 1000;
+        self.engineStarted = true;
+        [self.statusTextView setText:@"Engine Started!"];
+        [self setResultText:@""];
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = TRUE;
+        self.longPressButton.enabled = FALSE;
+        self.forceWakeupButton.enabled = TRUE;
+        self.cancelDialogButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineStopped {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.streamRecorder stop];
+        }
+        self.engineStarted = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+        self.startEngineButton.enabled = TRUE;
+        self.stopEngineButton.enabled = FALSE;
+        self.longPressButton.enabled = TRUE;
+        self.forceWakeupButton.enabled = FALSE;
+        self.cancelDialogButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineResult:(NSData *)data isFinal:(BOOL)isFinal {
+    long response_delay = 0;
+    if (isFinal && self.talkingFinisheTimestamp > 0) {
+        response_delay = [self timeDelayFrom:self.talkingFinisheTimestamp];
+        self.talkingFinisheTimestamp = 0;
+    }
+    
+    NSError *error;
+    NSDictionary *jsonResult = [NSJSONSerialization JSONObjectWithData:data
+                                                               options:NSJSONReadingMutableContainers
+                                                                 error:&error];
+    NSMutableString *text = [[NSMutableString alloc] initWithString:@""];
+    if (![jsonResult objectForKey:@"messageData"]) {
+        return;
+    }
+    [text appendFormat:@"%@", [[[jsonResult objectForKey:@"messageData"] objectForKey:@"inputText"] objectForKey:@"text"]];
+    if (text.length) {
+        [self setResultText:text];
+    }
+}
+
+- (void)speechEngineNluResult:(NSData *)data {
+    NSError *error;
+    NSDictionary *jsonResult = [NSJSONSerialization JSONObjectWithData:data
+                                                               options:NSJSONReadingMutableContainers
+                                                                 error:&error];
+    NSMutableString *text = [[NSMutableString alloc] initWithString:@""];
+    if (![jsonResult objectForKey:@"messageData"]) {
+        return;
+    }
+    [text appendFormat:@"%@\n%@", [[jsonResult objectForKey:@"messageData"] objectForKey:@"inputText"], [[jsonResult objectForKey:@"messageData"] objectForKey:@"outputText"]];
+    if (text.length) {
+        [self setResultText:text];
+    }
+    bool disableTts = [self.settings getBool:SETTING_FULLLINK_DISABLE_TTS];
+    [self.curEngine sendDirective:SEDirectivePlayingDecision data:disableTts ? @"false" : @"true"];
+}
+
+- (void)speechEngineError:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]];
+//        [self stopEngine:nil];
+    });
+}
+
+- (void)speechEngineWakeUp:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]];
+    });
+}
+
+- (void)setResultText:(NSString *)result {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[result stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+    });
+}
+
+#pragma mark - Helper
+
+- (long)timeDelayFrom:(long)pastTimestamp {
+    return [[NSDate date] timeIntervalSince1970] * 1000 - pastTimestamp;
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_FULLLINK forKey:@"viewId"];
+}
+
+@end
+
+

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/KwsViewController.h

@@ -0,0 +1,13 @@
+//
+//  AsrOfflineViewController.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/8.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface KwsViewController : UIViewController
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/KwsViewController.m

@@ -0,0 +1,482 @@
+//
+//  KwsViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/8.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import "KwsViewController.h"
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SpeechResourceManager.h"
+#import "SensitiveDefines.h"
+
+@interface KwsViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *engineInitButton;
+@property (weak, nonatomic) IBOutlet UIButton *engineUninitButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *longPressButton;
+
+@property (strong, nonatomic) SpeechEngine *curEngine;
+@property (assign, nonatomic) BOOL engineStarted;
+
+// Device ID: 用于定位线上问题
+@property (nonatomic, strong) NSString *deviceID;
+// Debug Path: 用于存放一些 SDK 相关的文件，比如模型、日志等
+@property (strong, nonatomic) NSString *debugPath;
+
+@property (weak, nonatomic) StreamRecorder *streamRecorder;
+
+// settings
+@property (strong, nonatomic) Settings *settings;
+
+@end
+
+@implementation KwsViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_KWS];
+    
+    self.engineInitButton.enabled = TRUE;
+    self.engineUninitButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.longPressButton.enabled = FALSE;
+    [self.statusTextView setText:@"Waiting for init."];
+    [self decorateTextView:self.resultTextView];
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    UILongPressGestureRecognizer *longPgr = [[UILongPressGestureRecognizer alloc] initWithTarget:self
+                                                                                          action:@selector(longPressTriggered:)];
+    longPgr.minimumPressDuration = 0.5;
+    [self.longPressButton addGestureRecognizer:longPgr];
+    self.streamRecorder = [ViewController getStreamRecorder];
+    self.engineStarted = FALSE;
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self uninitEngine];
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+#pragma mark - Config & Init & Uninit Methods
+
+-(void)configInitParams{
+    //【必需配置】Engine Name
+    [self.curEngine setStringParam:SE_KWS_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+    
+    //【可选配置】Debug & Log
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.curEngine setStringParam:SE_LOG_LEVEL_DEBUG forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+    
+    //【必需配置】配置音频来源
+    [self.curEngine setStringParam:[self.settings getOptionsValue:SETTING_RECORD_TYPE] forKey:SE_PARAMS_KEY_RECORDER_TYPE_STRING];
+    
+    // 当音频来源为 RECORDER_TYPE_STREAM 时，如输入音频采样率不等于 16K，需添加如下配置
+    if ([self.settings getOptionsValue:SETTING_RECORD_TYPE] == SE_RECORDER_TYPE_STREAM) {
+        if ([self.streamRecorder getSampleRate] != 16000) {
+            // 当音频来源为 RECORDER_TYPE_STREAM 时【必需配置】，否则【无需配置】
+            // 启用 SDK 内部的重采样
+            [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ENABLE_RESAMPLER_BOOL];
+            // 将重采样所需的输入采样率设置为 APP 层输入的音频的实际采样率
+            [self.curEngine setIntParam:[self.streamRecorder getSampleRate] forKey:SE_PARAMS_KEY_CUSTOM_SAMPLE_RATE_INT];
+        }
+    }
+    
+    NSString* recPath = @"";
+    if ([self.settings getBool:SETTING_RECORD_SAVE]) {
+        recPath = self.debugPath;
+    }
+    [self.curEngine setStringParam:recPath forKey:SE_PARAMS_KEY_REC_PATH_STRING];
+    [self.curEngine setIntParam:[self.settings getOptions:SETTING_RECORD_FILE_TYPE].chooseIdx forKey:SE_PARAMS_KEY_REC_FILE_TYPE_INT];
+    
+    [self.curEngine setStringParam:@"{\"array_type\": 0,\"radius\":0.0,\"total_channels\":1,\"mic_offset\":0,\"mic_num\":1,\"ref_offset\":0,\"ref_num\":0,\"vad_speech_active_thresh\":0.5,\"vad_speech_deactive_thresh\":0.5}" forKey:SE_PARAMS_KEY_KWS_USER_PARAM_STRING];
+    [self.curEngine setIntParam:600 forKey:SE_PARAMS_KEY_KWS_VAD_END_SILENCE_TIMEOUT_INT];
+    [self.curEngine setBoolParam:false forKey:SE_PARAMS_KEY_KWS_ENABLE_VAD_BOOL];
+
+    SpeechResourceManager *resourceManager = [SpeechResourceManager shareInstance];
+    NSString* modelsPath = [resourceManager getModelPath:[self getKwsModelName]];
+    NSLog(@"Kws model path: %@", modelsPath);
+    [self.curEngine setStringParam:modelsPath forKey:SE_PARAMS_KEY_KWS_ROOT_PATH_STRING];
+}
+
+-(void)configStartParams{
+    //【可选配置】控制是否返回录音音量，在 APP 需要显示音频波形时可以启用
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_GET_VOLUME] forKey:SE_PARAMS_KEY_ENABLE_GET_VOLUME_BOOL];
+    
+    if ([self.settings getOptionsValue:SETTING_RECORD_TYPE] == SE_RECORDER_TYPE_STREAM) {
+        if (![self.streamRecorder start]) {
+            [self speechEngineNoPermission];
+        }
+    } else if ([self.settings getOptionsValue:SETTING_RECORD_TYPE] == SE_RECORDER_TYPE_FILE) {
+        // 使用音频文件唤醒时，需要设置文件的绝对路径
+        NSString* file_path = [NSString stringWithFormat:@"%@/%@", self.debugPath, @"kws_rec_file.pcm"];
+        NSLog(@"输入的音频文件路径: %@", file_path);
+        // 使用音频文件唤醒时【必须配置】，否则【无需配置】
+        [self.curEngine setStringParam:file_path forKey:SE_PARAMS_KEY_RECORDER_FILE_STRING];
+    }
+}
+
+#pragma mark - Init Methods
+
+- (void)initEngine {
+    NSLog(@"获取设备ID，调试使用");
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+    NSLog(@"获取设备ID成功: %@", self.deviceID);
+    
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"当前调试路径: %@", self.debugPath);
+
+    SpeechResourceManager *resourceManager = [SpeechResourceManager shareInstance];
+    [resourceManager setAppId:SDEF_APPID];
+    [resourceManager setAppVersion:@"1.0.0"];
+    [resourceManager setDeviceId:self.deviceID];
+    [resourceManager setRootPath:self.debugPath];
+    [resourceManager setSpeechEngineName:SE_KWS_ENGINE];
+    [resourceManager setAddress:@"https://sdk.bytespeech.com"];
+    [resourceManager setOnlineModelEnable:NO];
+    [resourceManager setup];
+    
+    if ([resourceManager checkModelExist:[self getKwsModelName]]) {
+        [resourceManager checkModelVersion:[self getKwsModelName] completion:^(SEResourceStatus status, BOOL needUpdate, NSData *data) {
+            if (status == kSERSuccess) {
+                if (needUpdate) {
+                    [self fetchResource];
+                } else {
+                    [self initEngineInternal];
+                }
+            } else {
+                NSLog(@"Model check failed: %@", [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);
+                [self.resultTextView setText:@"Failed to check asr resource"];
+                [self speechEngineInitFailed:status];
+            }
+        }];
+    } else {
+        [self fetchResource];
+    }
+}
+
+- (void)fetchResource {
+    SpeechResourceManager *resourceManager = [SpeechResourceManager shareInstance];
+    [resourceManager fetchModelByName:[self getKwsModelName] completion:^(SEResourceStatus status, NSData* data) {
+        if (status == kSERSuccess) {
+            [self initEngineInternal];
+        } else {
+            [self.resultTextView setText:@"Failed to fetch asr resource"];
+            [self speechEngineInitFailed:status];
+        }
+    }];
+}
+
+- (void)initEngineInternal {
+    
+    NSLog(@"创建引擎");
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+        if (![self.curEngine createEngineWithDelegate:self]) {
+            NSLog(@"引擎创建失败.");
+            return;
+        }
+    }
+    [self.resultTextView setTextColor:UIColor.blackColor];
+    NSLog(@"SDK 版本号: %@", [self.curEngine getVersion]);
+
+    NSLog(@"配置初始化参数");
+    [self configInitParams];
+    
+    NSLog(@"引擎初始化");
+    SEEngineErrorCode ret = [self.curEngine initEngine];
+    if (ret == SENoError) {
+        NSLog(@"初始化成功");
+        [self speechEngineInitSucceeded];
+    } else {
+        NSLog(@"初始化失败，返回值: %d", ret);
+        [self speechEngineInitFailed:ret];
+    }
+}
+
+- (void)uninitEngine {
+    [self.curEngine destroyEngine];
+    self.curEngine = nil;
+    self.engineInitButton.enabled = TRUE;
+    self.engineUninitButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.longPressButton.enabled = FALSE;
+}
+
+- (void)speechEngineInitSucceeded {
+    [self.streamRecorder setSpeechEngine:self.curEngine];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.statusTextView setText:@"Ready"];
+        self.engineUninitButton.enabled = TRUE;
+        self.engineInitButton.enabled = FALSE;
+        self.startEngineButton.enabled = TRUE;
+        self.longPressButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineInitFailed:(int)initStatus {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:[[NSString alloc] initWithFormat:@"Failed to init engine, %d!", initStatus]];
+        self.engineInitButton.enabled = TRUE;
+        self.engineUninitButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineNoPermission {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"No permission!"];
+        self.engineInitButton.enabled = TRUE;
+        self.engineUninitButton.enabled = FALSE;
+    });
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)initEngineBtnClicked:(id)sender {
+    [self initEngine];
+}
+
+- (IBAction)uninitEngineBtnClicked:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self uninitEngine];
+    [self.resultTextView setTextColor:UIColor.grayColor];
+    [self.resultTextView setText:@"点击或按住说话后，展示语音唤醒结果"];
+}
+
+- (IBAction)startEngineBtnClicked:(id)sender {
+    [self setResultText:@""];
+    
+    NSLog(@"配置启动参数");
+    [self configStartParams];
+    
+    // Directive：启动引擎前调用SYNC_STOP指令，保证前一次请求结束。
+    NSLog(@"Directive: SEDirectiveSyncStopEngine");
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveSyncStopEngine];
+    if (ret != SENoError) {
+        NSLog(@"Send directive syncstop failed: %d", ret);
+    } else {
+        NSLog(@"启用引擎.");
+        NSLog(@"Directive: SEDirectiveStartEngine");
+        SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+        if (ret == SERecCheckEnvironmentFailed) {
+            [self speechEngineNoPermission];
+        }
+    }
+}
+
+- (IBAction)stopEngineBtnClicked:(id)sender {
+    NSLog(@"关闭引擎");
+    NSLog(@"Directive: SEDirectiveStopEngine");
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+}
+
+- (void)recordTriggered:(UILongPressGestureRecognizer *)longPgr {
+    if (longPgr.state == UIGestureRecognizerStateBegan) {
+        [self setResultText:@""];
+        
+        NSLog(@"配置启动参数");
+        [self configStartParams];
+        
+        // Directive：启动引擎前调用SYNC_STOP指令，保证前一次请求结束。
+        NSLog(@"Directive: SEDirectiveSyncStopEngine");
+        SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveSyncStopEngine];
+        if (ret != SENoError) {
+            NSLog(@"Send directive syncstop failed: %d", ret);
+        } else {
+            // Directive：启动引擎指令。
+            NSLog(@"Directive: SEDirectiveStartEngine");
+            SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+            if (ret == SERecCheckEnvironmentFailed) {
+                [self speechEngineNoPermission];
+            }
+        }
+    } else if (longPgr.state == UIGestureRecognizerStateEnded) {
+        // Directive：结束音频输入。
+        NSLog(@"Directive: SEDirectiveFinishTalking");
+        [self.curEngine sendDirective:SEDirectiveFinishTalking];
+        if ([self.settings getOptionsValue:SETTING_RECORD_TYPE] == SE_RECORDER_TYPE_STREAM) {
+            [self.streamRecorder stop];
+        }
+    }
+}
+
+#pragma mark - SpeechEngineDelegate
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    switch (type) {
+        case SEEngineStart:
+            // Callback: 引擎启动成功回调
+            NSLog(@"Callback: 引擎启动成功");
+            [self speechEngineStarted];
+            break;
+        case SEEngineStop:
+            // Callback: 引擎关闭回调
+            NSLog(@"Callback: 引擎关闭");
+            [self speechEngineStopped];
+            break;
+        case SEEngineError:
+            // Callback: 错误信息回调
+            NSLog(@"Callback: 错误信息: %@", data);
+            [self speechEngineError:data];
+            break;
+        case SEWakeupResult:
+            // Callback: 唤醒结果
+            NSLog(@"Callback: 唤醒结果");
+            [self speechEngineResult:data];
+            break;
+        case SEFinalResult:
+        case SEVolumeLevel:
+            // Callback: 录音音量回调
+            NSLog(@"Callback: 录音音量");
+            break;
+        default:
+            break;
+    }
+}
+
+#pragma mark - Engine Callback
+
+- (void)speechEngineStarted {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.engineStarted = true;
+        [self.statusTextView setText:@"Engine Started!"];
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = TRUE;
+        self.longPressButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineStopped {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if ([self getRecorderType] == SE_RECORDER_TYPE_STREAM) {
+            [self.streamRecorder stop];
+        }
+        self.engineStarted = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+        self.startEngineButton.enabled = TRUE;
+        self.stopEngineButton.enabled = FALSE;
+        self.longPressButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineResult:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]];
+    });
+}
+
+- (void)speechEngineError:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        // 从回调的 json 数据中解析错误码和错误详细信息
+        id error_json = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
+        if ([error_json isKindOfClass:[NSDictionary class]]) {
+            NSDictionary *error_info = error_json;
+            NSInteger error_code = [[error_info objectForKey:@"err_code"] intValue];
+            switch (error_code) {
+                case SEEncodingAudioError:
+                    [self stopEngineBtnClicked:nil];
+                    break;
+                default:
+                    break;
+            }
+            // 在 UI 显示错误信息
+            if ([error_info objectForKey:@"name"] != nil) {
+                NSString* error_msg = [[error_json objectForKey:@"err_msg"] stringValue];
+                NSString* reqid = [[error_json objectForKey:@"reqid"] stringValue];
+                [self setResultText:[NSString stringWithFormat:@"reqid: %@, error: %@", reqid, error_msg]];
+            } else {
+                [self setResultText:[NSString stringWithFormat:@"%@", error_info]];
+            }
+        }
+    });
+}
+
+#pragma mark - Helper
+
+- (NSString *)getRecorderType {
+    SettingOptions* recorderTypeOptions = [self.settings getOptions:SETTING_RECORD_TYPE];
+    switch (recorderTypeOptions.chooseIdx) {
+        case 0:
+            return SE_RECORDER_TYPE_RECORDER;
+        case 1:
+            return SE_RECORDER_TYPE_FILE;
+        case 2:
+            return SE_RECORDER_TYPE_STREAM;
+        default:
+            break;
+    }
+    return @"";
+}
+
+- (void)setResultText:(NSString *)result {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[result stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+    });
+}
+
+- (void)updateWakeupWords {
+    if (self.curEngine == nil) {
+        return;
+    }
+    NSString* customWords = [self.settings getString:SETTING_KWS_CUSTOM_WORDS];
+    if (customWords.length == 0) {
+        return;
+    }
+    [self.curEngine sendDirective:SEDirectiveUpdateWakeupWordsParams data:customWords];
+}
+
+- (NSString*)getKwsModelName {
+    return [self.settings getString:SETTING_KWS_MODEL_NAME];
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_KWS forKey:@"viewId"];
+}
+
+@end
+

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/SpeechDemoToB-Info.plist

@@ -0,0 +1,70 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>2</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>NSMicrophoneUsageDescription</key>
+	<string>Speech demo would like to access your recorder data.</string>
+	<key>UIApplicationSceneManifest</key>
+	<dict>
+		<key>UIApplicationSupportsMultipleScenes</key>
+		<false/>
+		<key>UISceneConfigurations</key>
+		<dict>
+			<key>UIWindowSceneSessionRoleApplication</key>
+			<array>
+				<dict>
+					<key>UISceneConfigurationName</key>
+					<string>Default Configuration</string>
+					<key>UISceneDelegateClassName</key>
+					<string>SceneDelegate</string>
+					<key>UISceneStoryboardFile</key>
+					<string>Main</string>
+				</dict>
+			</array>
+		</dict>
+	</dict>
+	<key>UIBackgroundModes</key>
+	<array>
+		<string>audio</string>
+	</array>
+	<key>UIFileSharingEnabled</key>
+	<true/>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>armv7</string>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
+</plist>

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/TtsNormalViewController.h

@@ -0,0 +1,13 @@
+//
+//  TtsNormalViewController.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/8.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface TtsNormalViewController : UIViewController
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/TtsNormalViewController.m

@@ -0,0 +1,824 @@
+//
+//  TtsNormalViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/8.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import "TtsNormalViewController.h"
+#include <Foundation/Foundation.h>
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SensitiveDefines.h"
+
+@interface TtsNormalViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+@property (weak, nonatomic) IBOutlet UITextView *referTextView;
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *engineSwitchButton;
+@property (weak, nonatomic) IBOutlet UIButton *createConnectionButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *pauseResumeButton;
+
+// Device ID: 用于定位线上问题
+@property (nonatomic, strong) NSString *deviceID;
+// Debug Path: 用于存放一些 SDK 相关的文件，比如模型、日志等
+@property (strong, nonatomic) NSString *debugPath;
+
+// SpeechEngine
+@property (strong, nonatomic) SpeechEngine *curEngine;
+
+// Engine State
+@property (assign, nonatomic) BOOL engineInited;
+@property (assign, nonatomic) BOOL connectionCreated;
+@property (assign, nonatomic) BOOL engineStarted;
+@property (assign, nonatomic) BOOL engineErrorOccurred;
+@property (assign, nonatomic) BOOL playerPaused;
+
+// Settings
+@property (strong, nonatomic) Settings *settings;
+
+// 一些在线合成的配置
+@property (strong, nonatomic) NSString *ttsAppId;
+@property (strong, nonatomic) NSString *ttsVoiceOnline;
+@property (strong, nonatomic) NSString *ttsVoiceTypeOnline;
+
+// 一些离线合成的配置
+@property (strong, nonatomic) NSString *ttsVoiceOffline;
+@property (strong, nonatomic) NSString *ttsVoiceTypeOffline;
+
+// 用于合成的文本
+@property (strong, nonatomic) NSString *ttsText;
+
+
+@end
+
+@implementation TtsNormalViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_TTS];
+    
+    self.engineSwitchButton.enabled = TRUE;
+    [self decorateTextView:self.referTextView];
+    [self decorateTextView:self.resultTextView];
+    [self.referTextView setDelegate:self];
+    self.referTextView.editable = TRUE;
+    self.engineInited = FALSE;
+    self.connectionCreated = FALSE;
+    self.engineStarted = FALSE;
+    self.engineErrorOccurred = FALSE;
+    self.playerPaused = FALSE;
+
+
+    [self.statusTextView setText:@"Waiting for init."];
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"当前调试路径 %@", self.debugPath);
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(appDidEnterBackground:)
+                                                 name:UIApplicationDidEnterBackgroundNotification
+                                               object:nil];
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+#pragma mark - Notifications
+
+- (void)appDidEnterBackground:(UIApplication *)application; {
+    NSLog(@"app enter background.");
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+}
+
+-(void)appWillTerminate:(NSNotification*)note {
+    [[NSNotificationCenter defaultCenter] removeObserver:self
+                                                    name:UIApplicationDidEnterBackgroundNotification
+                                                  object:nil];
+}
+
+#pragma mark - Config & Init & Uninit Methods
+
+-(void)configInitParams {
+    //【必需配置】Engine Name
+    [self.curEngine setStringParam:SE_TTS_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+
+    //【必需配置】Work Mode, 可选值如下
+    // SETtsWorkModeOnline, 只进行在线合成，不需要配置离线合成相关参数；
+    // SETtsWorkModeOffline, 只进行离线合成，不需要配置在线合成相关参数；
+    // SETtsWorkModeAlternate, 先发起在线合成，失败后（网络超时），启动离线合成引擎开始合成；
+    [self.curEngine setIntParam:[self getTtsWorkMode] forKey:SE_PARAMS_KEY_TTS_WORK_MODE_INT];
+
+    //【可选配置】Debug & Log
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.curEngine setStringParam:SE_LOG_LEVEL_DEBUG forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+
+    //【可选配置】User ID（用以辅助定位线上用户问题）
+    [self.curEngine setStringParam:SDEF_UID forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setStringParam:self.deviceID forKey:SE_PARAMS_KEY_DEVICE_ID_STRING];
+
+    //【可选配置】是否将合成出的音频保存到设备上，为 true 时需要正确配置 PARAMS_KEY_TTS_AUDIO_PATH_STRING 才会生效
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_TTS_ENABLE_DUMP]
+                          forKey:SE_PARAMS_KEY_TTS_ENABLE_DUMP_BOOL];
+    // TTS 音频文件保存目录，必须在合成之前创建好且 APP 具有访问权限，保存的音频文件名格式为 tts_{reqid}.wav, {reqid} 是本次合成的请求 id
+    // PARAMS_KEY_TTS_ENABLE_DUMP_BOOL 配置为 true 的音频时为【必需配置】，否则为【可选配置】
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_TTS_AUDIO_PATH_STRING];
+
+    //【可选配置】合成出的音频的采样率，默认为 24000
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_TTS_SAMPLE_RATE] forKey:SE_PARAMS_KEY_TTS_SAMPLE_RATE_INT];
+    //【可选配置】打断播放时使用多长时间淡出停止，单位：毫秒。默认值 0 表示不淡出
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_AUDIO_FADEOUT_DURATION] forKey:SE_PARAMS_KEY_AUDIO_FADEOUT_DURATION_INT];
+    //【可选配置】是否禁止创建播放器对象，不使用 SDK 内置播放器时可开启，默认为 false. 开启后将 SE_PARAMS_KEY_TTS_ENABLE_PLAYER_BOOL 设置为 true 不起作用。 
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_PREVENT_PLAYER_CREATION] forKey:SE_PARAMS_KEY_PREVENT_PLAYER_CREATION_BOOL];
+    
+    // ------------------------ 在线合成相关配置 -----------------------
+
+    NSString* appid = [self.settings getString:SETTING_APPID];
+    self.ttsAppId = appid.length > 0 ? appid : SDEF_APPID;
+    //【必需配置】在线合成鉴权相关：Appid
+    [self.curEngine setStringParam:self.ttsAppId forKey:SE_PARAMS_KEY_APP_ID_STRING];
+
+    NSString* token = [self.settings getString:SETTING_TOKEN];
+    NSString* ttsAppToken = token.length > 0 ? token : SDEF_TOKEN;
+    //【必需配置】在线合成鉴权相关：Token
+    [self.curEngine setStringParam:ttsAppToken forKey:SE_PARAMS_KEY_APP_TOKEN_STRING];
+
+    //【必需配置】语音合成服务域名
+    NSString *address = [self.settings getString:SETTING_ADDRESS];
+    NSString *ttsAddress = address.length > 0 ? address : SDEF_DEFAULT_ADDRESS;
+    [self.curEngine setStringParam:ttsAddress forKey:SE_PARAMS_KEY_TTS_ADDRESS_STRING];
+
+    //【必需配置】语音合成服务Uri
+    NSString *uri = [self.settings getString:SETTING_URI];
+    NSString *ttsUri = uri.length > 0 ? uri : SDEF_TTS_DEFAULT_URI;
+    [self.curEngine setStringParam:ttsUri forKey:SE_PARAMS_KEY_TTS_URI_STRING];
+
+    // 【可选配置】是否允许在 websocket 建连失败时自动重连
+    [self.curEngine setBoolParam:![self.settings getBool:SETTING_DISABLE_WS_RECONNECT] forKey:SE_PARAMS_KEY_ENABLE_WS_RECONNECT_BOOL];
+
+    //【可选配置】在线合成下发的 opus-ogg 音频的压缩倍率
+    [self.curEngine setIntParam:10 forKey:SE_PARAMS_KEY_TTS_COMPRESSION_RATE_INT];
+
+
+    // ------------------------ 离线合成相关配置 -----------------------
+
+    if ([self getTtsWorkMode] != SETtsWorkModeOnline && [self getTtsWorkMode] != SETtsWorkModeFile) {
+        NSString* resourcePath = @"";
+        if ([[self.settings getOptionsValue:SETTING_TTS_OFFLINE_RESOURCE_FORMAT] isEqual: @"SingleVoice"]) {
+            resourcePath = [[SpeechResourceManager shareInstance] getModelPath];
+        } else if ([[self.settings getOptionsValue:SETTING_TTS_OFFLINE_RESOURCE_FORMAT] isEqual: @"MultipleVoice"]) {
+            NSString *model_name = [self.settings getString:SETTING_TTS_MODEL_NAME];
+            resourcePath = [[SpeechResourceManager shareInstance] getModelPath:model_name];
+        }
+        NSLog(@"TTS resource root path: %@", resourcePath);
+        //【必需配置】离线合成所需资源存放路径
+        [self.curEngine setStringParam:resourcePath forKey:SE_PARAMS_KEY_TTS_OFF_RESOURCE_PATH_STRING];
+    }
+
+    //【必需配置】离线合成鉴权相关：证书文件存放路径
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_LICENSE_DIRECTORY_STRING];
+    NSString* authenticationType = [self getAuthenticationType];
+    //【必需配置】Authenticate Type
+    [self.curEngine setStringParam:authenticationType forKey:SE_PARAMS_KEY_AUTHENTICATE_TYPE_STRING];
+    if ([authenticationType isEqualToString:SE_AUTHENTICATE_TYPE_PRE_BIND]) {
+        // 按包名授权，获取到授权的 APP 可以不限次数、不限设备数的使用离线合成
+        NSString *licenseName = [self.settings getString:SETTING_LICENSE_NAME];
+        NSString *licenseBusiId = [self.settings getString:SETTING_LICENSE_BUSI_ID];
+        // 证书名和业务 ID, 离线合成鉴权相关，使用火山提供的证书下发服务时为【必需配置】, 否则为【无需配置】
+        // 证书名，用于下载按报名授权的证书文件
+        [self.curEngine setStringParam:licenseName forKey:SE_PARAMS_KEY_LICENSE_NAME_STRING];
+        // 业务 ID, 用于下载按报名授权的证书文件
+        [self.curEngine setStringParam:licenseBusiId forKey:SE_PARAMS_KEY_LICENSE_BUSI_ID_STRING];
+    } else if ([authenticationType isEqualToString:SE_AUTHENTICATE_TYPE_LATE_BIND]) {
+        // 按装机量授权，不限制 APP 的包名和使用次数，但是限制使用离线合成的设备数量
+        //【必需配置】离线合成鉴权相关：Authenticate Address
+        [self.curEngine setStringParam:SDEF_AUTHENTICATE_ADDRESS forKey:SE_PARAMS_KEY_AUTHENTICATE_ADDRESS_STRING];
+        //【必需配置】离线合成鉴权相关：Authenticate Uri
+        [self.curEngine setStringParam:SDEF_AUTHENTICATE_URI forKey:SE_PARAMS_KEY_AUTHENTICATE_URI_STRING];
+        NSString* curBusinessKey = [self.settings getString:SETTING_BUSINESS_KEY];
+        NSString* curAuthenticateSecret = [self.settings getString:SETTING_AUTHENTICATE_SECRET];
+        //【必需配置】离线合成鉴权相关：Business Key
+        [self.curEngine setStringParam:curBusinessKey forKey:SE_PARAMS_KEY_BUSINESS_KEY_STRING];
+        //【必需配置】离线合成鉴权相关：Authenticate Secret
+        [self.curEngine setStringParam:curAuthenticateSecret forKey:SE_PARAMS_KEY_AUTHENTICATE_SECRET_STRING];
+    }
+
+    // ------------------------ 在离线切换相关配置 -----------------------
+    if ([self getTtsWorkMode] == SETtsWorkModeAlternate) {
+        // 断点续播功能在断点处会发生由在线合成音频切换到离线合成音频，为了提升用户体验，SDK 支持
+        // 淡出地停止播放在线音频然后再淡入地开始播放离线音频，下面两个参数可以控制淡出淡入的长度
+        
+        //【可选配置】断点续播专用，切换到离线合成时淡入的音频长度，单位：毫秒
+        [self.curEngine setIntParam:30 forKey:SE_PARAMS_KEY_TTS_FADEIN_DURATION_INT];
+        //【可选配置】断点续播专用，在线合成停止播放时淡出的音频长度，单位：毫秒
+        [self.curEngine setIntParam:30 forKey:SE_PARAMS_KEY_TTS_FADEOUT_DURATION_INT];
+    }
+}
+
+-(void)configStartTtsParams {
+    //【必需配置】TTS 使用场景
+    [self.curEngine setStringParam:SE_TTS_SCENARIO_TYPE_NORMAL forKey:SE_PARAMS_KEY_TTS_SCENARIO_STRING];
+
+    NSString* curText = self.referTextView.text;
+    if (curText.length > 0) {
+        self.ttsText = curText;
+    } else {
+        self.ttsText = @"愿中国青年都摆脱冷气，只是向上走，不必听自暴自弃者流的话。能做事的做事，能发声的发声。有一分热，发一分光。就令萤火一般，也可以在黑暗里发一点光，不必等候炬火。此后如竟没有炬火：我便是唯一的光。";
+    }
+
+    //【必需配置】需合成的文本，不可超过 80 字
+    [self.curEngine setStringParam:self.ttsText forKey:SE_PARAMS_KEY_TTS_TEXT_STRING];
+    //【可选配置】需合成的文本的类型，支持直接传文本(TTS_TEXT_TYPE_PLAIN)和传 SSML 形式(TTS_TEXT_TYPE_SSML)的文本
+    [self.curEngine setStringParam:[self getTtsTextType] forKey:SE_PARAMS_KEY_TTS_TEXT_TYPE_STRING];
+    //【可选配置】用于控制 TTS 音频的语速，支持的配置范围参考火山官网 语音技术/语音合成/离在线语音合成SDK/参数说明 文档
+    [self.curEngine setDoubleParam:[self.settings getDouble:SETTING_TTS_SPEAK_SPEED] forKey:SE_PARAMS_KEY_TTS_SPEED_RATIO_DOUBLE];
+    //【可选配置】用于控制 TTS 音频的音量，支持的配置范围参考火山官网 语音技术/语音合成/离在线语音合成SDK/参数说明 文档
+    [self.curEngine setDoubleParam:[self.settings getDouble:SETTING_TTS_AUDIO_VOLUME] forKey:SE_PARAMS_KEY_TTS_VOLUME_RATIO_DOUBLE];
+    //【可选配置】用于控制 TTS 音频的音高，支持的配置范围参考火山官网 语音技术/语音合成/离在线语音合成SDK/参数说明 文档
+    [self.curEngine setDoubleParam:[self.settings getDouble:SETTING_TTS_AUDIO_PITCH] forKey:SE_PARAMS_KEY_TTS_PITCH_RATIO_DOUBLE];
+    //【可选配置】是否在文本的每句结尾处添加静音段，单位：毫秒，默认为 0ms
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_TTS_SILENCE_DURATION] forKey:SE_PARAMS_KEY_TTS_SILENCE_DURATION_INT];
+
+    //【可选配置】是否使用 SDK 内置播放器播放合成出的音频，默认为 true
+    [self.curEngine setBoolParam:![self.settings getBool:SETTING_PREVENT_PLAYER_CREATION] && [self.settings getBool:SETTING_TTS_ENABLE_PLAYER]
+                          forKey:SE_PARAMS_KEY_TTS_ENABLE_PLAYER_BOOL];
+    //【可选配置】是否令 SDK 通过回调返回合成的音频数据，默认不返回。
+    // 开启后，SDK 会流式返回音频，收到 SETtsAudioData 回调表示当次合成所有的音频已经全部返回
+    [self.curEngine setIntParam:[self.settings getBool:SETTING_TTS_ENABLE_DATA_CALLBACK] ? SETtsDataCallbackModeAll : SETtsDataCallbackModeNone forKey:SE_PARAMS_KEY_TTS_DATA_CALLBACK_MODE_INT];
+
+    // SDK 支持使用传入的 reqid 作为合成的唯一标识
+    NSString* ttsReqId = [self.settings getString:SETTING_TTS_REQUEST_ID];
+    if (ttsReqId.length > 0) {
+        NSLog(@"Tts req id: %@", ttsReqId);
+        //【可选配置】唯一标识一次合成的 reqid, 不传则自动生成并伴随 MESSAGE_TYPE_TTS_SYNTHESIS_BEGIN 返回
+        [self.curEngine setStringParam:ttsReqId forKey:SE_PARAMS_KEY_TTS_REQUEST_ID_STRING];
+    }
+    
+    // ------------------------ 在线合成相关配置 -----------------------
+
+    //【必需配置】语音合成服务所用集群
+    NSString *cluster = [self.settings getString:SETTING_CLUSTER];
+    [self.curEngine setStringParam:cluster forKey:SE_PARAMS_KEY_TTS_CLUSTER_STRING];
+
+    NSString *voiceOnline = [self.settings getString:SETTING_ONLINE_VOICE];
+    if (voiceOnline.length <= 0) {
+        voiceOnline = [self.settings getOptionsValue:SETTING_ONLINE_VOICE];
+    }
+    self.ttsVoiceOnline = voiceOnline;
+    //【必需配置】在线合成使用的发音人代号
+    [self.curEngine setStringParam:self.ttsVoiceOnline forKey:SE_PARAMS_KEY_TTS_VOICE_ONLINE_STRING];
+    NSString *voiceTypeOnline = [self.settings getString:SETTING_ONLINE_VOICE_TYPE];
+    if (voiceTypeOnline.length <= 0) {
+        voiceTypeOnline = [self.settings getOptionsValue:SETTING_ONLINE_VOICE_TYPE];
+    }
+    self.ttsVoiceTypeOnline = voiceTypeOnline;
+    //【必需配置】在线合成使用的音色代号
+    [self.curEngine setStringParam:self.ttsVoiceTypeOnline forKey:SE_PARAMS_KEY_TTS_VOICE_TYPE_ONLINE_STRING];
+
+    //【可选配置】是否打开在线合成的服务端缓存，默认关闭
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_TTS_ENABLE_CACHE] forKey:SE_PARAMS_KEY_TTS_ENABLE_CACHE_BOOL];
+    //【可选配置】指定在线合成的语种，默认为空，即不指定
+    [self.curEngine setStringParam:[self.settings getString:SETTING_TTS_ONLINE_LANGUAGE] forKey:SE_PARAMS_KEY_TTS_LANGUAGE_ONLINE_STRING];
+    //【可选配置】是否启用在线合成的情感预测功能
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_TTS_WITH_INTENT] forKey:SE_PARAMS_KEY_TTS_WITH_INTENT_BOOL];
+    //【可选配置】指定在线合成的情感，例如 happy, sad 等
+    [self.curEngine setStringParam:[self.settings getString:SETTING_TTS_EMOTION] forKey:SE_PARAMS_KEY_TTS_EMOTION_STRING];
+    //【可选配置】需要返回详细的播放进度或需要启用断点续播功能时应配置为 1, 否则配置为 0 或不配置
+    [self.curEngine setIntParam:[self.settings getBool:SETTING_TTS_ENABLE_RESUME_FROM_BREAKPOINT] forKey:SE_PARAMS_KEY_TTS_WITH_FRONTEND_INT];
+    //【可选配置】使用复刻音色
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_TTS_USE_VOICECLONE_VOICE] forKey:SE_PARAMS_KEY_TTS_USE_VOICECLONE_BOOL];
+    //【可选配置】在开启前述使用复刻音色的开关后，制定复刻音色所用的后端集群
+    [self.curEngine setStringParam:[self.settings getString:SETTING_TTS_BACKEND_CLUSTER] forKey:SE_PARAMS_KEY_TTS_BACKEND_CLUSTER_STRING];
+
+    //【可选配置】在线合成的请求参数，JSON 格式。当服务端新增参数但是 SDK 还未新增对应的配置项时，开发者可自行构造请求参数由此传入
+    [self.curEngine setStringParam:[self.settings getString:SETTING_TTS_REQUEST_PARAMS] forKey:SE_PARAMS_KEY_TTS_REQ_PARAMS_STRING];
+
+    // ------------------------ 离线合成相关配置 -----------------------
+
+    NSString *voiceOffline = [self.settings getString:SETTING_OFFLINE_VOICE];
+    if (voiceOffline.length <= 0) {
+        voiceOffline = [self.settings getOptionsValue:SETTING_OFFLINE_VOICE];
+    }
+    self.ttsVoiceOffline = voiceOffline;
+    //【必需配置】离线合成使用的发音人代号
+    [self.curEngine setStringParam:self.ttsVoiceOffline forKey:SE_PARAMS_KEY_TTS_VOICE_OFFLINE_STRING];
+    NSString *voiceTypeOffline = [self.settings getString:SETTING_OFFLINE_VOICE_TYPE];
+    if (voiceTypeOffline.length <= 0) {
+        voiceTypeOffline = [self.settings getOptionsValue:SETTING_OFFLINE_VOICE_TYPE];
+    }
+    self.ttsVoiceTypeOffline = voiceTypeOffline;
+    //【必需配置】离线合成使用的音色代号
+    [self.curEngine setStringParam:self.ttsVoiceTypeOffline forKey:SE_PARAMS_KEY_TTS_VOICE_TYPE_OFFLINE_STRING];
+
+    //【可选配置】是否降低离线合成的 CPU 利用率，默认关闭
+    // 打开该配置会使离线合成的实时率变大，仅当必要（例如为避免系统主动杀死CPU占用持续过高的进程）时才应开启
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_TTS_LIMIT_CPU_USAGE] forKey:SE_PARAMS_KEY_TTS_LIMIT_CPU_USAGE_BOOL];
+}
+
+- (void)initEngine {
+    NSLog(@"获取设备ID，调试使用");
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+    NSLog(@"获取设备ID成功: %@", self.deviceID);
+    
+    
+    NSLog(@"创建引擎");
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+        if (![self.curEngine createEngineWithDelegate:self]) {
+            NSLog(@"引擎创建失败.");
+            return;
+        }
+    }
+    NSLog(@"SDK 版本号: %@", [self.curEngine getVersion]);
+
+    if ([self getTtsWorkMode] == SETtsWorkModeOnline || [self getTtsWorkMode] == SETtsWorkModeFile) {
+        // 当使用纯在线模式时，不需要下载离线合成所需资源
+        [self initEngineInternal];
+    } else {
+        [self.statusTextView setText:@"Waiting for loading model."];
+        // 下载离线合成所需资源需要区分多音色资源和单音色资源，下载这两种资源所调用的方法略有不同
+        if ([[self.settings getOptionsValue:SETTING_TTS_OFFLINE_RESOURCE_FORMAT] isEqual: @"MultipleVoice"]) {
+            // 多音色资源是指一个资源文件中包含了多个离线音色，这种资源一般是旧版(V2)离线合成所用资源
+            NSLog(@"当前所用资源类别为多音色资源，开始准备多音色资源");
+            [self prepareMultipleVoiceResource];
+        } else if ([[self.settings getOptionsValue:SETTING_TTS_OFFLINE_RESOURCE_FORMAT] isEqual: @"SingleVoice"]) {
+            // 单音色资源是指一个资源文件仅包含一个离线音色，新版(V4 及以上)离线合成用的就是单音色资源
+            NSLog(@"当前所用资源类别为单音色资源，开始准备单音色资源");
+            [self prepareSingleVoiceResource];
+        }
+    }
+}
+
+- (void)prepareMultipleVoiceResource {
+    // 因为多音色资源的一个文件包含了多个音色，导致资源的名字和音色的名字无法一一对应
+    // 所以下载资源需要显式指定资源名字
+    NSString *model_name = [self.settings getString:SETTING_TTS_MODEL_NAME];
+    SpeechResourceManager *speechResourceManager = [SpeechResourceManager shareInstance];
+    NSLog(@"检查本地是否存在可用模型");
+    if (![speechResourceManager checkModelExist:model_name]) {
+        NSLog(@"本地没有模型，开始下载");
+        [self fetchMultipleVoiceResource:model_name];
+    } else {
+        NSLog(@"模型存在，检查是否需要更新模型");
+        [speechResourceManager checkModelVersion:model_name completion:^(SEResourceStatus status, BOOL needUpdate, NSData *data) {
+            if (status != kSERSuccess || needUpdate == NO) {
+                NSLog(@"无需更新，直接使用本地已有模型。");
+                [self initEngineInternal];
+            } else {
+                NSLog(@"存在更新，开始下载模型");
+                [self fetchMultipleVoiceResource:model_name];
+            }
+        }];
+    }
+}
+
+- (void)fetchMultipleVoiceResource:(NSString*)model_name {
+    NSLog(@"需要下载的模型名为 %@", model_name);
+    SpeechResourceManager *speechResourceManager = [SpeechResourceManager shareInstance];
+    [speechResourceManager fetchModelByName:model_name completion:^(SEResourceStatus status, NSData* data) {
+        if (status == kSERSuccess) {
+            NSLog(@"下载成功");
+            [self initEngineInternal];
+        } else {
+            NSLog(@"下载失败，错误码: %d", status);
+            [self speechEngineInitFailed:kSERDownloadFailed];
+        }
+    }];
+}
+
+- (void)prepareSingleVoiceResource {
+    SpeechResourceManager *speechResourceManager = [SpeechResourceManager shareInstance];
+    NSString* offlineLanguage = [self.settings getString:SETTING_TTS_OFFLINE_LANGUAGE];
+    if (offlineLanguage.length <= 0) {
+        offlineLanguage = SDEF_TTS_DEFAULT_OFFLINE_LANGUAGE;
+    }
+    NSArray* ttsLanguageArray = @[offlineLanguage];
+    NSLog(@"需要下载的离线合成语种资源有： %@", ttsLanguageArray);
+    [speechResourceManager setTtsLanguage:ttsLanguageArray];
+    NSArray* needDownloadVoiceType = (NSArray *)SDEF_TTS_DEFAULT_DOWNLOAD_OFFLINE_VOICES();
+    NSArray* voiceTypeArray = [self.settings getOptions:SETTING_OFFLINE_VOICE_TYPE].optionsArray;
+    if (voiceTypeArray != nil && voiceTypeArray.count > 0) {
+        needDownloadVoiceType = voiceTypeArray;
+    }
+    NSLog(@"需要下载的离线合成音色资源有： %@", needDownloadVoiceType);
+    [speechResourceManager setTtsVoiceType:needDownloadVoiceType];
+
+    NSLog(@"检查本地是否存在可用模型");
+    if ([speechResourceManager checkModelExist]) {
+        NSLog(@"本地没有模型，开始下载");
+        [self fetchSingleVoiceResource];
+    } else {
+        NSLog(@"模型存在，检查是否需要更新模型");
+        [speechResourceManager checkModelVersion:^(SEResourceStatus status, BOOL needUpdate, NSData *data) {
+            if (status != kSERSuccess || needUpdate == NO) {
+                NSLog(@"无需更新，直接使用本地已有模型。");
+                [self initEngineInternal];
+            } else {
+                NSLog(@"存在更新，开始下载模型");
+                [self fetchSingleVoiceResource];
+            }
+        }];
+    }
+}
+
+- (void)fetchSingleVoiceResource {
+    SpeechResourceManager *speechResourceManager = [SpeechResourceManager shareInstance];
+    [speechResourceManager fetchModel:^(SEResourceStatus status, NSData* data) {
+        if (status == kSERSuccess) {
+            NSLog(@"下载成功");
+            [self initEngineInternal];
+        } else {
+            NSLog(@"下载失败，错误码: %d", status);
+            [self speechEngineInitFailed:kSERDownloadFailed];
+        }
+    }];
+}
+
+- (void)initEngineInternal {
+    NSLog(@"配置初始化参数");
+    [self configInitParams];
+
+    NSLog(@"引擎初始化");
+    SEEngineErrorCode ret = [self.curEngine initEngine];
+    self.engineInited = (ret == SENoError);
+    if (self.engineInited) {
+        NSLog(@"初始化成功");
+        [self speechEngineInitSucceeded];
+    } else {
+        NSLog(@"初始化失败，返回值: %d", ret);
+        [self speechEngineInitFailed:ret];
+    }
+}
+
+- (void)uninitEngine {
+    if (self.curEngine != nil) {
+        NSLog(@"引擎析构");
+        [self.curEngine destroyEngine];
+        self.curEngine = nil;
+        NSLog(@"引擎析构完成");
+    }
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)switchEngine:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self clearResult:nil];
+    self.startEngineButton.enabled = FALSE;
+    self.pauseResumeButton.enabled = FALSE;
+    if (self.engineInited) {
+        self.referTextView.editable = FALSE;
+        [self uninitEngine];
+        self.engineInited = FALSE;
+        self.connectionCreated = FALSE;
+        [self.statusTextView setText:@"Waiting for init."];
+        self.engineSwitchButton.enabled = TRUE;
+        [self.engineSwitchButton setTitle:@"Init Engine" forState:UIControlStateNormal];
+        
+        self.stopEngineButton.enabled = FALSE;
+        self.createConnectionButton.enabled = FALSE;
+    } else {
+        self.referTextView.editable = TRUE;
+        [self initEngine];
+    }
+}
+
+- (IBAction)createConnection:(id)sender {
+    if (self.connectionCreated) {
+        NSLog(@"Connection is created.");
+        return;
+    }
+
+    // SEDirectiveCreateConnection 指令，可减小在线合成的端到端播放延时，主要应用在能够提前预知要使用语音合成的情况下，例如语音交互场景
+    // SEDirectiveCreateConnection 指令是一个同步指令，调用返回之后可以根据返回值判断连接是否建立成功
+    // 如果不使用 SEDirectiveCreateConnection 指令，建连实际发生在调用 DIRECTIVE_START_ENGINE 后
+    NSLog(@"触发提前建连");
+    NSLog(@"Directive: SEDirectiveCreateConnection");
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveCreateConnection];
+    if(ret != SENoError) {
+        NSString* error_message = [NSString stringWithFormat:@"在线合成提前建连失败: %d", ret];
+        NSLog(@"%@", error_message);
+        [self createConnectionFailed:error_message];
+    } else {
+        NSString* message = [NSString stringWithFormat:@"在线合成提前建连成功: %d", ret];
+        NSLog(@"%@", message);
+        [self createConnectionSucceeded:message];
+    }
+}
+
+- (IBAction)startEngineBtnClicked:(id)sender {
+    NSLog(@"Start engine, current status: %d", self.engineStarted);
+    if (!self.engineStarted) {
+        [self clearResult:nil];
+        self.engineErrorOccurred = FALSE;
+        
+        // Directive：启动引擎前调用SYNC_STOP指令，保证前一次请求结束。
+        NSLog(@"关闭引擎（同步）");
+        NSLog(@"Directive: SEDirectiveSyncStopEngine");
+        SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveSyncStopEngine];
+        if (ret != SENoError) {
+            NSLog(@"Send directive syncstop failed: %d", ret);
+        } else {
+            [self configStartTtsParams];
+            NSLog(@"启动引擎.");
+            NSLog(@"Directive: SEDirectiveStartEngine");
+            SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+            if (SENoError != ret) {
+                NSString* message = [NSString stringWithFormat:@"发送启动引擎指令失败: %d", ret];
+                [self sendStartEngineDirectiveFailed:message];
+            }
+        }
+    }
+}
+
+- (IBAction)stopEngineBtnClicked:(id)sender {
+    NSLog(@"关闭引擎");
+    NSLog(@"Directive: SEDirectiveStopEngine");
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+}
+
+- (void) pausePlayback {
+    NSLog(@"暂停播放");
+    NSLog(@"Directive: SEDirectivePausePlayer");
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectivePausePlayer];
+    if (ret == SENoError) {
+        self.playerPaused = TRUE;
+        [self.pauseResumeButton setTitle:@"Resume" forState:UIControlStateNormal];
+    }
+    NSLog(@"Pause playback status: %d", ret);
+}
+
+- (void)resumePlayback {
+    NSLog(@"继续播放");
+    NSLog(@"Directive: SEDirectiveResumePlayer");
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveResumePlayer];
+    if (ret == SENoError) {
+        self.playerPaused = FALSE;
+        [self.pauseResumeButton setTitle:@"Pause" forState:UIControlStateNormal];
+    }
+    NSLog(@"Resume playback status: %d", ret);
+}
+
+- (IBAction)controlPlayingStatus:(id)sender {
+    NSLog(@"Pause or resume player, current player status: %hhd", self.playerPaused);
+    if (self.playerPaused) {
+        [self resumePlayback];
+    } else {
+        [self pausePlayback];
+    }
+}
+
+- (IBAction)clearResult:(id)sender {
+    [self.resultTextView setText:@""];
+}
+
+#pragma mark - Message Callback
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    switch (type) {
+        case SEEngineStart:
+            NSLog(@"Callback: 引擎启动成功: data: %@", data);
+            [self speechEngineStarted];
+            break;
+        case SEEngineStop:
+            NSLog(@"Callback: 引擎关闭: data: %@", data);
+            [self speechEngineStopped];
+            break;
+        case SEEngineError:
+            NSLog(@"Callback: 错误信息: %@", data);
+            [self speechEngineError:data];
+            break;
+        case SETtsSynthesisBegin:
+            NSLog(@"Callback: 合成开始: %@", data);
+            [self speechStartSynthesis:data];
+            break;
+        case SETtsSynthesisEnd:
+            NSLog(@"Callback: 合成结束: %@", data);
+            [self speechFinishSynthesis:data];
+            break;
+        case SETtsStartPlaying:
+            NSLog(@"Callback: 播放开始: %@", data);
+            [self speechStartPlaying:data];
+            break;
+        case SETtsPlaybackProgress:
+            NSLog(@"Callback: 播放进度");
+            [self updatePlayingProgress:data];
+            break;
+        case SETtsFinishPlaying:
+            NSLog(@"Callback: 播放结束: %@", data);
+            [self speechFinishPlaying:data];
+            break;
+        case SETtsAudioData:
+            NSLog(@"Callback: 音频数据，长度 %lu 字节", (unsigned long)data.length);
+            [self speechTtsAudioData:data];
+            break;
+        default:
+            break;
+    }
+}
+
+- (void)speechEngineInitSucceeded {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.engineSwitchButton.enabled = TRUE;
+        [self.engineSwitchButton setTitle:@"UninitEngine" forState:UIControlStateNormal];
+        [self.statusTextView setText:@"Ready"];
+        [self.resultTextView setText:[NSString stringWithFormat:@"DeviceID: %@.", self.deviceID]];
+        self.referTextView.editable = TRUE;
+        self.startEngineButton.enabled = TRUE;
+        self.createConnectionButton.enabled = [self getTtsWorkMode] != SETtsWorkModeOffline;    });
+}
+
+- (void)speechEngineInitFailed:(int)initStatus {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:[[NSString alloc] initWithFormat:@"Failed to init engine, %d!", initStatus]];
+        self.engineSwitchButton.enabled = TRUE;
+    });
+}
+
+- (void)createConnectionSucceeded:(NSString*)tipText {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.createConnectionButton.enabled = FALSE;
+        [self.resultTextView setText:tipText];
+        self.connectionCreated = TRUE;
+    });
+}
+
+- (void)createConnectionFailed:(NSString*)tipText {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:tipText];
+        self.connectionCreated = FALSE;
+    });
+}
+
+- (void)sendStartEngineDirectiveFailed:(NSString*)tipText {
+    NSLog(@"%@", tipText);
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:tipText];
+        self.engineStarted = FALSE;
+    });
+}
+
+- (void)speechEngineStarted {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.referTextView.editable = FALSE;
+        self.engineStarted = true;
+        [self.statusTextView setText:@"Engine Started!"];
+        [self.resultTextView setText:self.ttsText];
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = TRUE;
+        self.createConnectionButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineStopped {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.referTextView.editable = TRUE;
+        self.engineStarted = FALSE;
+        self.connectionCreated = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+        self.startEngineButton.enabled = TRUE;
+        self.stopEngineButton.enabled = FALSE;
+        self.createConnectionButton.enabled = [self getTtsWorkMode] != SETtsWorkModeOffline;
+        [self.pauseResumeButton setTitle:@"Pause" forState:UIControlStateNormal];
+        self.pauseResumeButton.enabled = FALSE;
+        self.playerPaused = FALSE;
+    });
+}
+
+- (void)speechEngineError:(NSData *)data {
+    self.engineErrorOccurred = TRUE;
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setTextColor:[UIColor blackColor]];
+        [self.resultTextView setText:[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]];
+    });
+}
+
+- (void)speechStartSynthesis:(NSData *)data {
+}
+
+- (void)speechFinishSynthesis:(NSData *)data {
+}
+
+- (void)speechStartPlaying:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.pauseResumeButton.enabled = TRUE;
+    });
+}
+
+- (void)updatePlayingProgress :(NSData *)data {
+    if (data != nil) {
+        NSError *error = nil;
+        id object = [NSJSONSerialization
+                     JSONObjectWithData:data
+                     options:0
+                     error:&error];
+        if(error) {
+            NSLog(@"Parse data as json error!");
+            return ;
+        }
+        if([object isKindOfClass:[NSDictionary class]]) {
+            NSDictionary *results = object;
+            float percentage = [[results valueForKey:@"progress"] floatValue];
+            NSString *reqid = [results valueForKey:@"reqid"];
+            NSLog(@"当前播放的文本对应的 reqid: %@，播放进度：%.3f", reqid, percentage);
+        }
+    }
+}
+
+- (void)speechFinishPlaying :(NSData *)data {
+}
+
+- (void)speechTtsAudioData:(NSData *)data {
+}
+
+#pragma mark - Helper
+
+- (NSString*)getTtsTextType {
+    switch ([self.settings getOptions:SETTING_TTS_TEXT_TYPE].chooseIdx) {
+        case 0:
+            return SE_TTS_TEXT_TYPE_PLAIN;
+        case 1:
+            return SE_TTS_TEXT_TYPE_SSML;
+        default:
+            break;
+    }
+    return SE_TTS_TEXT_TYPE_PLAIN;;
+}
+
+- (int)getTtsWorkMode {
+    switch ([self.settings getOptions:SETTING_TTS_WORK_MODE].chooseIdx) {
+        case 0:
+            return SETtsWorkModeOnline;
+        case 1:
+            return SETtsWorkModeOffline;
+        case 2:
+            return SETtsWorkModeAlternate;
+        default:
+            break;
+    }
+    return SETtsWorkModeOnline;;
+}
+
+- (NSString*)getAuthenticationType {
+    switch ([self.settings getOptions:SETTING_AUTHENTICATION_TYPE].chooseIdx) {
+        case 0:
+            return SE_AUTHENTICATE_TYPE_PRE_BIND;
+        case 1:
+            return SE_AUTHENTICATE_TYPE_LATE_BIND;
+        default:
+            break;
+    }
+    return SE_AUTHENTICATE_TYPE_PRE_BIND;
+}
+
+- (long)timeDelayFrom:(long)pastTimestamp {
+    return [[NSDate date] timeIntervalSince1970] * 1000 - pastTimestamp;
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_TTS forKey:@"viewId"];
+}
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/TtsNovelViewController.h

@@ -0,0 +1,13 @@
+//
+//  TtsNovelViewController.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/8.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface TtsNovelViewController : UIViewController
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/UniTTSViewController.h

@@ -0,0 +1,17 @@
+//
+//  UniTTSViewController.h
+//  SpeechDemo
+//
+//  Created by ByteDance on 2025/7/3.
+//  Copyright © 2025 ByteDance. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface UniTTSViewController : UIViewController
+
+@end
+
+NS_ASSUME_NONNULL_END

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/UniTTSViewController.m

@@ -0,0 +1,476 @@
+//
+//  UniTTSViewController.m
+//  SpeechDemo
+//
+//  Created by ByteDance on 2025/7/3.
+//  Copyright © 2025 ByteDance. All rights reserved.
+//
+
+#import "UniTTSViewController.h"
+#include <CoreFoundation/CoreFoundation.h>
+#include <objc/objc.h>
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SensitiveDefines.h"
+
+@interface UniTTSViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+@property (weak, nonatomic) IBOutlet UITextView *referTextView;
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *engineSwitchButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *pauseResumeButton;
+
+// Device ID: 用于定位线上问题
+@property (nonatomic, strong) NSString *deviceID;
+// Debug Path: 用于存放一些 SDK 相关的文件，比如模型、日志等
+@property (strong, nonatomic) NSString *debugPath;
+
+// SpeechEngine
+@property (strong, nonatomic) SpeechEngine *curEngine;
+
+// Engine State
+@property (assign, nonatomic) BOOL engineInited;
+@property (assign, nonatomic) BOOL engineStarted;
+@property (assign, nonatomic) BOOL playerPaused;
+// Settings
+@property (strong, nonatomic) Settings *settings;
+
+@end
+
+@implementation UniTTSViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_UNITTS];
+    
+    self.engineSwitchButton.enabled = TRUE;
+    self.referTextView.editable = TRUE;
+    self.engineInited = FALSE;
+    self.engineStarted = FALSE;
+    self.playerPaused = FALSE;
+
+    [self.referTextView setText:@"愿中国青年都摆脱冷气，只是向上走，不必听自暴自弃者流的话。能做事的做事，能发声的发声。有一分热，发一分光。就令萤火一般，也可以在黑暗里发一点光，不必等候炬火。此后如竟没有炬火：我便是唯一的光。"];
+    [self.statusTextView setText:@"Waiting for init."];
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"当前调试路径 %@", self.debugPath);
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(audioInterruptionHandler:)
+                                                 name:AVAudioSessionInterruptionNotification
+                                               object:nil];
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [super viewDidDisappear:animated];
+}
+
+#pragma mark - Notifications
+
+-(void)appWillTerminate:(NSNotification*)note {
+    [[NSNotificationCenter defaultCenter] removeObserver:self
+                                                    name:AVAudioSessionInterruptionNotification
+                                                  object:nil];
+}
+
+- (void)audioInterruptionHandler:(NSNotification*)notification {
+    AVAudioSessionInterruptionType interruptionType = (AVAudioSessionInterruptionType)[[notification.userInfo objectForKey:AVAudioSessionInterruptionTypeKey] unsignedIntegerValue];
+    AVAudioSessionInterruptionOptions intertuptionOptions = [[notification.userInfo objectForKey:AVAudioSessionInterruptionOptionKey] unsignedIntValue];
+    NSLog(@"Receive audio interruption notification, type: %lu, options: %lu.", (unsigned long)interruptionType, (unsigned long)intertuptionOptions);
+    if (interruptionType == AVAudioSessionInterruptionTypeBegan) {
+        NSLog(@"Audio session interruption began");
+        @synchronized (self) {
+            [self pausePlayback];
+        }
+    } else if (interruptionType == AVAudioSessionInterruptionTypeEnded) {
+        @synchronized (self) {
+            NSLog(@"Audio session interruption ended");
+            if (intertuptionOptions == AVAudioSessionInterruptionOptionShouldResume) {
+                AVAudioSession *session = [AVAudioSession sharedInstance];
+                AVAudioSessionCategoryOptions cur_options = session.categoryOptions;
+                // AudioQueueStart() will return AVAudioSessionErrorCodeCannotInterruptOthers if options didn't contains AVAudioSessionCategoryOptionMixWithOthers
+                if (!(cur_options & AVAudioSessionCategoryOptionMixWithOthers)) {
+                    AVAudioSessionCategoryOptions readyOptions = AVAudioSessionCategoryOptionMixWithOthers | cur_options;
+                    [session setCategory:AVAudioSessionCategoryPlayback withOptions:readyOptions error:nil];
+                }
+                [self resumePlayback];
+                
+                cur_options = session.categoryOptions;
+                // Remove AVAudioSessionCategoryOptionMixWithOthers, or the playback will not be interrupted any more
+                if (cur_options & AVAudioSessionCategoryOptionMixWithOthers) {
+                    [session setCategory:AVAudioSessionCategoryPlayback withOptions:((~AVAudioSessionCategoryOptionMixWithOthers) & cur_options) error:nil];
+                }
+            }
+        }
+    }
+}
+
+#pragma mark - Config & Init & Uninit Methods
+
+-(void)configInitParams {
+    //【必需配置】Engine Name（双向流式TTS Engine 也支持 单向流式TTS 功能）
+    [self.curEngine setStringParam:SE_BITTS_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+
+    //【可选配置】Debug & Log
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.curEngine setStringParam:SE_LOG_LEVEL_DEBUG forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+    
+    //【可选配置】User ID（用以辅助定位线上用户问题）
+    [self.curEngine setStringParam:SDEF_UID forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setStringParam:self.deviceID forKey:SE_PARAMS_KEY_DEVICE_ID_STRING];
+    
+    //【可选配置】是否将合成出的音频保存到设备上，为 true 时需要正确配置 PARAMS_KEY_TTS_AUDIO_PATH_STRING 才会生效
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_TTS_ENABLE_DUMP]
+                          forKey:SE_PARAMS_KEY_TTS_ENABLE_DUMP_BOOL];
+    // TTS 音频文件保存目录，必须在合成之前创建好且 APP 具有访问权限，保存的音频文件名格式为 tts_{reqid}.wav, {reqid} 是本次合成的请求 id
+    // PARAMS_KEY_TTS_ENABLE_DUMP_BOOL 配置为 true 的音频时为【必需配置】，否则为【可选配置】
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_TTS_AUDIO_PATH_STRING];
+    //【可选配置】自定义请求Header
+    [self.curEngine setStringParam:[self.settings getString:SETTING_REQUEST_HEADERS] forKey:SE_PARAMS_KEY_REQUEST_HEADERS_STRING];
+    //【可选配置】是否使用 SDK 内置播放器播放合成出的音频，默认为 true
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_TTS_ENABLE_PLAYER]
+                          forKey:SE_PARAMS_KEY_TTS_ENABLE_PLAYER_BOOL];
+    //【可选配置】是否令 SDK 通过回调返回合成的音频数据，默认不返回。
+    // 开启后，SDK 会流式返回音频，收到 SETtsAudioData 回调表示当次合成所有的音频已经全部返回
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ENABLE_PLAYER_AUDIO_CALL_BACK] ? SETtsDataCallbackModeAll : SETtsDataCallbackModeNone forKey:SE_PARAMS_KEY_ENABLE_PLAYER_AUDIO_CALLBACK_BOOL];
+    
+    // ------------------------ 在线合成相关配置 -----------------------
+    //【必需配置】在线合成鉴权相关：Appid
+    [self.curEngine setStringParam:[self.settings getString:SETTING_APPID] forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    //【必需配置】在线合成鉴权相关：Token
+    [self.curEngine setStringParam:[self.settings getString:SETTING_TOKEN] forKey:SE_PARAMS_KEY_APP_TOKEN_STRING];
+    //【必需配置】语音合成服务域名
+    [self.curEngine setStringParam:[self.settings getString:SETTING_ADDRESS] forKey:SE_PARAMS_KEY_TTS_ADDRESS_STRING];
+    //【必需配置】语音合成服务Uri
+    [self.curEngine setStringParam:[self.settings getString:SETTING_URI] forKey:SE_PARAMS_KEY_TTS_URI_STRING];
+    //【必需配置】语音合成服务资源id
+    [self.curEngine setStringParam:[self.settings getString:SETTING_RESOURCE_ID] forKey: SE_PARAMS_KEY_RESOURCE_ID_STRING];
+    //【可选配置】TTS连接超时时间
+    [self.curEngine setIntParam:10000 forKey:SE_PARAMS_KEY_TTS_CONN_TIMEOUT_INT];
+
+}
+
+- (void)initEngine {
+    NSLog(@"获取设备ID，调试使用");
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+    NSLog(@"获取设备ID成功: %@", self.deviceID);
+    
+    
+    NSLog(@"创建引擎");
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+        if (![self.curEngine createEngineWithDelegate:self]) {
+            NSLog(@"引擎创建失败.");
+            return;
+        }
+    }
+    NSLog(@"SDK 版本号: %@", [self.curEngine getVersion]);
+    [self initEngineInternal];
+}
+
+- (void)initEngineInternal {
+    NSLog(@"配置初始化参数");
+    [self configInitParams];
+    
+    NSLog(@"引擎初始化");
+    SEEngineErrorCode ret = [self.curEngine initEngine];
+    self.engineInited = (ret == SENoError);
+    if (self.engineInited) {
+        NSLog(@"初始化成功");
+        [self speechEngineInitSucceeded];
+    } else {
+        NSLog(@"初始化失败，返回值: %d", ret);
+        [self speechEngineInitFailed:ret];
+    }
+}
+
+- (void)uninitEngine {
+    if (self.curEngine != nil) {
+        NSLog(@"引擎析构");
+        [self.curEngine destroyEngine];
+        self.curEngine = nil;
+        NSLog(@"引擎析构完成");
+    }
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)switchEngine:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self clearResult:nil];
+    self.startEngineButton.enabled = FALSE;
+    self.pauseResumeButton.enabled = FALSE;
+    if (self.engineInited) {
+        self.referTextView.editable = TRUE;
+        [self uninitEngine];
+        self.engineInited = FALSE;
+        [self.statusTextView setText:@"Waiting for init."];
+        self.engineSwitchButton.enabled = TRUE;
+        [self.engineSwitchButton setTitle:@"Init Engine" forState:UIControlStateNormal];
+        self.stopEngineButton.enabled = FALSE;
+    } else {
+        self.referTextView.editable = TRUE;
+        [self initEngine];
+    }
+}
+
+- (IBAction)startEngineBtnClicked:(id)sender {
+    NSLog(@"Start engine, current status: %d", self.engineStarted);
+    if (!self.engineStarted) {
+        [self clearResult:nil];
+        
+        // Directive：启动引擎前调用SYNC_STOP指令，保证前一次请求结束。
+        NSLog(@"关闭引擎（同步）");
+        NSLog(@"Directive: SEDirectiveSyncStopEngine");
+        SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveSyncStopEngine];
+        if (ret != SENoError) {
+            NSLog(@"Send directive syncstop failed: %d", ret);
+        } else {
+            
+            NSLog(@"启动引擎.");
+            NSLog(@"Directive: SEDirectiveStartEngine");
+            NSString* startPayload = [NSString stringWithFormat:@"{\"req_params\":{\"text\":\"%@\",\"speaker\":\"zh_female_roumeinvyou_emo_v2_mars_bigtts\",\"audio_params\":{\"emotion\":\"excited\",\"loudness_rate\":50}}}", self.referTextView.text];
+            SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine data:startPayload];
+            if (SENoError != ret) {
+                NSString* message = [NSString stringWithFormat:@"发送启动引擎指令失败: %d", ret];
+                [self sendStartEngineDirectiveFailed:message];
+                return;
+            }
+            ret = [self.curEngine sendDirective:SEDirectiveEventStartSession data:@""];
+            if (ret != SENoError) {
+                NSLog(@"Start Session faile: %d", ret);
+            }
+        }
+    }
+}
+
+- (IBAction)stopEngineBtnClicked:(id)sender {
+    NSLog(@"关闭引擎");
+    NSLog(@"Directive: SEDirectiveStopEngine");
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+}
+
+- (void)pausePlayback {
+    NSLog(@"暂停播放");
+    NSLog(@"Directive: SEDirectivePausePlayer");
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectivePausePlayer];
+    if (ret == SENoError) {
+        self.playerPaused = TRUE;
+        [self.pauseResumeButton setTitle:@"Resume" forState:UIControlStateNormal];
+    }
+    NSLog(@"Pause playback status: %d", ret);
+}
+
+- (void)resumePlayback {
+    NSLog(@"继续播放");
+    NSLog(@"Directive: SEDirectiveResumePlayer");
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveResumePlayer];
+    if (ret == SENoError) {
+        self.playerPaused = FALSE;
+        [self.pauseResumeButton setTitle:@"Pause" forState:UIControlStateNormal];
+    }
+    NSLog(@"Resume playback status: %d", ret);
+}
+
+- (IBAction)controlPlayingStatus:(id)sender {
+    NSLog(@"Pause or resume player, current player status: %hhd", self.playerPaused);
+    if (self.playerPaused) {
+        [self resumePlayback];
+    } else {
+        [self pausePlayback];
+    }
+}
+
+- (IBAction)clearResult:(id)sender {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:@""];
+    });
+}
+
+#pragma mark - Message Callback
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    switch (type) {
+        case SEEngineStart:
+            NSLog(@"Callback: 引擎启动成功: data: %@", data);
+            [self speechEngineStarted];
+            break;
+        case SEEngineStop:
+            NSLog(@"Callback: 引擎关闭: data: %@", data);
+            [self speechEngineStopped];
+            break;
+        case SEEngineError:
+            NSLog(@"Callback: 错误信息: %@", data);
+            [self speechEngineError:data];
+            break;
+        case SEEventConnectionStarted:
+            NSLog(@"Callback: SEEventConnectionStarted");
+            break;
+        case SEEventConnectionFailed:
+            NSLog(@"Callback: SEEventConnectionFailed");
+            break;
+        case SEEventConnectionFinished:
+            NSLog(@"Callback: SEEventConnectionFinished");
+            break;
+        case SEEventSessionStarted:
+            NSLog(@"Callback: SEEventSessionStarted");
+            break;
+        case SEEventSessionCanceled:
+            NSLog(@"Callback: SEEventSessionCanceled");
+            break;
+        case SEEventSessionFinished:
+            NSLog(@"Callback: SEEventSessionFinished");
+            break;
+        case SEEventSessionFailed:
+            NSLog(@"Callback: SEEventSessionFailed");
+            break;
+        case SEEventTTSSentenceStart:
+            NSLog(@"Callback: 合成开始 SentenceStart: %@", data);
+            break;
+        case SEEventTTSSentenceEnd:
+            NSLog(@"Callback: 合成结束 SentenceEnd: %@", data);
+        case SEEventTTSResponse:
+            NSLog(@"Callback: 收到合成音频 TTSResponse: %@", data);
+        case SEEventTTSEnded:
+            NSLog(@"Callback: TTSEnd: %@", data);
+        case SEPlayerAudioData:
+            NSLog(@"Callback: 接收到播放的pcm音频");
+            break;
+        case SEPlayerStartPlayAudio:
+            NSLog(@"Callback: 开始播放TTS音频");
+            [self speechStartPlaying:nil];
+            break;
+        case SEPlayerFinishPlayAudio:
+            NSLog(@"Callback: 结束播放TTS音频");
+            [self speechFinishPlaying:nil];
+            break;
+        default:
+            break;
+    }
+}
+
+- (void)speechEngineInitSucceeded {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.engineSwitchButton.enabled = TRUE;
+        [self.engineSwitchButton setTitle:@"UninitEngine" forState:UIControlStateNormal];
+        [self.statusTextView setText:@"Ready"];
+        [self.resultTextView setText:[NSString stringWithFormat:@"DeviceID: %@.", self.deviceID]];
+        self.referTextView.editable = TRUE;
+        self.startEngineButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineInitFailed:(int)initStatus {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:[[NSString alloc] initWithFormat:@"Failed to init engine, %d!", initStatus]];
+        self.engineSwitchButton.enabled = TRUE;
+    });
+}
+
+- (void)sendSynthesisDirectiveFailed:(NSString*)tipText {
+    NSLog(@"%@", tipText);
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:tipText];
+        [self.curEngine sendDirective:SEDirectiveStopEngine];
+    });
+}
+
+- (void)sendStartEngineDirectiveFailed:(NSString*)tipText {
+    NSLog(@"%@", tipText);
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:tipText];
+        self.engineStarted = FALSE;
+    });
+}
+
+- (void)speechEngineStarted {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.referTextView.editable = TRUE;
+        self.engineStarted = true;
+        [self.statusTextView setText:@"Engine Started!"];
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineStopped {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.referTextView.editable = TRUE;
+        self.engineStarted = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+        self.startEngineButton.enabled = TRUE;
+        self.stopEngineButton.enabled = FALSE;
+        [self.pauseResumeButton setTitle:@"Pause" forState:UIControlStateNormal];
+        self.pauseResumeButton.enabled = FALSE;
+        self.playerPaused = FALSE;
+    });
+}
+
+- (void)speechEngineError:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        id json_obj = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
+        if ([json_obj isKindOfClass:[NSDictionary class]]) {
+            NSDictionary *error_info = json_obj;
+            [self setResultText:[NSString stringWithFormat:@"%@", error_info]];
+        }
+    });
+}
+
+- (void)setResultText:(NSString *)result {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        NSString *currentText = self.resultTextView.text ?: @"";
+        NSString *newText = [NSString stringWithFormat:@"%@\n%@", currentText, result];
+        [self.resultTextView setText:newText];
+        if (self.resultTextView.text.length > 0) {
+            NSRange bottomRange = NSMakeRange(self.resultTextView.text.length - 1, 1);
+            [self.resultTextView scrollRangeToVisible:bottomRange];
+            [self.resultTextView layoutIfNeeded];
+        }
+    });
+}
+
+- (void)speechStartPlaying:(NSData *)data {
+    NSLog(@"TTS start playing");
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.pauseResumeButton.enabled = TRUE;
+    });
+}
+
+- (void)speechFinishPlaying :(NSData *)data {
+    NSLog(@"TTS finish playing");
+    [self setResultText:@"playing finished"];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        // 播放结束，停止引擎
+        [self stopEngineBtnClicked:nil];
+    });
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_UNITTS forKey:@"viewId"];
+}
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/VadViewController.h

@@ -0,0 +1,18 @@
+//
+//  VadViewController.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2023/1/30.
+//  Copyright © 2023 tinalei.richard. All rights reserved.
+//
+
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface VadViewController : UIViewController
+
+@end
+
+NS_ASSUME_NONNULL_END

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/VadViewController.m

@@ -0,0 +1,455 @@
+//
+//  VadViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2023/1/30.
+//  Copyright © 2023 tianlei.richard. All rights reserved.
+//
+
+#import "VadViewController.h"
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SensitiveDefines.h"
+
+@interface VadViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *engineInitButton;
+@property (weak, nonatomic) IBOutlet UIButton *engineUninitButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *longPressButton;
+
+@property (strong, nonatomic) SpeechEngine *curEngine;
+@property (assign, nonatomic) BOOL engineStarted;
+
+@property (nonatomic, strong) NSString *deviceID;
+@property (nonatomic, assign) long talkingFinisheTimestamp;
+@property (nonatomic, assign) long vadDuration;
+@property (nonatomic, assign) long vadBeginPosition;
+@property (nonatomic, assign) long vadEndPosition;
+@property (strong, nonatomic) NSString *debugPath;
+
+@property (weak, nonatomic) StreamRecorder *streamRecorder;
+
+// settings
+@property (strong, nonatomic) Settings *settings;
+
+@end
+
+@implementation VadViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_VAD];
+    
+    self.engineInitButton.enabled = TRUE;
+    self.engineUninitButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.longPressButton.enabled = FALSE;
+    [self.statusTextView setText:@"Waiting for init."];
+    [self decorateTextView:self.resultTextView];
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    UILongPressGestureRecognizer *longPgr = [[UILongPressGestureRecognizer alloc] initWithTarget:self
+                                                                                          action:@selector(longPressTriggered:)];
+    longPgr.minimumPressDuration = 0.5;
+    [self.longPressButton addGestureRecognizer:longPgr];
+    self.streamRecorder = [ViewController getStreamRecorder];
+    self.engineStarted = FALSE;
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self uninitEngine];
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+#pragma mark - SpeechEngineDelegate
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    switch (type) {
+        case SEEngineStart:
+            [self speechEngineStarted];
+            break;
+        case SEEngineStop:
+            [self speechEngineStopped];
+            break;
+        case SEEngineError:
+            [self speechEngineError:data];
+            break;
+        case SEVadSilence:
+            break;
+        case SEVadSil2Speech:
+            [self messageVadBegin:data];
+            break;
+        case SEVadSpeech:
+            [self messasgeVadSpeech:data];
+            break;
+        case SEVadSpeech2Sil:
+            [self messageVadEnd:data];
+            break;
+        case SEVadAudioData:
+            self.vadDuration += data.length;
+            break;
+        case SEEngineLog:
+            NSLog(@"engine log: %s", (char*)data.bytes);
+            break;
+        default:
+            break;
+    }
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)initEngine:(id)sender {
+    [self initEngine];
+}
+
+- (IBAction)uninitEngine:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self uninitEngine];
+    [self.resultTextView setTextColor:UIColor.grayColor];
+    [self.resultTextView setText:@"点击或按住说话后，展示音频活性检测结果"];
+}
+
+- (IBAction)startEngine:(id)sender {
+    NSLog(@"Start engine.");
+    NSString* appID = [self.settings getString:SETTING_APPID];
+    [self.curEngine setStringParam:appID.length <= 0 ? SDEF_APPID : appID forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_RESTART_AUDIO_SESSION_ENABLE]
+                          forKey:SE_PARAMS_KEY_RESTART_AUDIOSESSION_BOOL];
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_RESUME_OTHERS_INTERRUPTED_PLAYBACK_ENABLE]
+                          forKey:SE_PARAMS_KEY_RESUME_OTHERS_INTERRUPTED_PLAYBACK_BOOL];
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_GET_VOLUME] forKey:SE_PARAMS_KEY_ENABLE_GET_VOLUME_BOOL];
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_VAD_HEAD_SILENCE_THRESHOLD] forKey:SE_PARAMS_KEY_VAD_HEAD_SILENCE_THRESHOLD_INT];
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_VAD_TAIL_SILENCE_THRESHOLD] forKey:SE_PARAMS_KEY_VAD_TAIL_SILENCE_THRESHOLD_INT];
+    
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        [self.curEngine setIntParam:[self.streamRecorder getSampleRate] forKey:SE_PARAMS_KEY_CUSTOM_SAMPLE_RATE_INT];
+        if (![self.streamRecorder start]) {
+            [self speechEngineNoPermission];
+            return;
+        }
+    } else if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_FILE]) {
+        NSString* file_path = [NSString stringWithFormat:@"%@/%@", self.debugPath, @"vad_rec_file.pcm"];
+        NSLog(@"test file path: %@", file_path);
+        [self.curEngine setStringParam:file_path forKey:SE_PARAMS_KEY_RECORDER_FILE_STRING];
+    }
+    
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+    if (ret == SERecCheckEnvironmentFailed) {
+        [self speechEngineNoPermission];
+    }
+}
+
+- (IBAction)stopEngine:(id)sender {
+    NSLog(@"Stop engine.");
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+}
+
+- (void)longPressTriggered:(UILongPressGestureRecognizer *)longPgr {
+    if (longPgr.state == UIGestureRecognizerStateBegan) {
+        NSLog(@"Long press begin.");
+        
+        [self setResultText:@""];
+        NSString* appID = [self.settings getString:SETTING_APPID];
+        [self.curEngine setStringParam:appID.length <= 0 ? SDEF_APPID : appID forKey:SE_PARAMS_KEY_APP_ID_STRING];
+        [self.curEngine setBoolParam:[self.settings getBool:SETTING_RESTART_AUDIO_SESSION_ENABLE]
+                              forKey:SE_PARAMS_KEY_RESTART_AUDIOSESSION_BOOL];
+        [self.curEngine setBoolParam:[self.settings getBool:SETTING_RESUME_OTHERS_INTERRUPTED_PLAYBACK_ENABLE]
+                              forKey:SE_PARAMS_KEY_RESUME_OTHERS_INTERRUPTED_PLAYBACK_BOOL];
+        [self.curEngine setBoolParam:[self.settings getBool:SETTING_GET_VOLUME]
+                              forKey:SE_PARAMS_KEY_ENABLE_GET_VOLUME_BOOL];
+        [self.curEngine setIntParam:[self.settings getInt:SETTING_VAD_HEAD_SILENCE_THRESHOLD] forKey:SE_PARAMS_KEY_VAD_HEAD_SILENCE_THRESHOLD_INT];
+        [self.curEngine setIntParam:[self.settings getInt:SETTING_VAD_TAIL_SILENCE_THRESHOLD] forKey:SE_PARAMS_KEY_VAD_TAIL_SILENCE_THRESHOLD_INT];
+
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.curEngine setIntParam:[self.streamRecorder getSampleRate] forKey:SE_PARAMS_KEY_CUSTOM_SAMPLE_RATE_INT];
+            if (![self.streamRecorder start]) {
+                [self speechEngineNoPermission];
+                return;
+            }
+        } else if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_FILE]) {
+            NSString* file_path = [NSString stringWithFormat:@"%@/%@", self.debugPath, @"vad_rec_file.pcm"];
+            NSLog(@"test file path: %@", file_path);
+            [self.curEngine setStringParam:file_path forKey:SE_PARAMS_KEY_RECORDER_FILE_STRING];
+        }
+        
+        SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+        if (ret == SERecCheckEnvironmentFailed) {
+            [self speechEngineNoPermission];
+        }
+    } else if (longPgr.state == UIGestureRecognizerStateEnded) {
+        NSLog(@"Long press ended.");
+        self.talkingFinisheTimestamp = [[NSDate date] timeIntervalSince1970] * 1000;
+        [self.curEngine sendDirective:SEDirectiveFinishTalking];
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.streamRecorder stop];
+        }
+    }
+}
+
+#pragma mark - Init Methods
+
+- (void)initEngine {
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    if (appDelegate.deviceID.length < 1) {
+        self.engineInitButton.enabled = FALSE;
+        dispatch_async(dispatch_get_main_queue(), ^{
+            [self.statusTextView setText:@"Waiting for get deviceID."];
+            sleep(1);
+            [self initEngine];
+        });
+        return;
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+    
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+    }
+    if (![self.curEngine createEngineWithDelegate:self]) {
+        NSLog(@"Create speech engine failed.");
+        return;
+    }
+
+    [self.resultTextView setTextColor:UIColor.blackColor];
+    NSLog(@"Engine version: %@", [self.curEngine getVersion]);
+    [self initOfflineModel:^() {
+        self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+        NSLog(@"Debug path: %@", self.debugPath);
+        [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+        [self.curEngine setStringParam:SE_LOG_LEVEL_TRACE forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+        [self.curEngine setStringParam:SDEF_APPID forKey:SE_PARAMS_KEY_APP_ID_STRING];
+        [self.curEngine setStringParam:self.deviceID forKey:SE_PARAMS_KEY_DEVICE_ID_STRING];
+        [self.curEngine setIntParam:1 forKey:SE_PARAMS_KEY_CHANNEL_NUM_INT];
+        [self.curEngine setBoolParam:[self.settings getBool:SETTING_GET_VOLUME]
+                            forKey:SE_PARAMS_KEY_ENABLE_GET_VOLUME_BOOL];
+        [self.curEngine setStringParam:@"" forKey:SE_PARAMS_KEY_VAD_REC_PATH_STRING];
+        if ([self.settings getBool:SETTING_VAD_RECORDER_SAVE]) {
+            [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_VAD_REC_PATH_STRING];
+        }
+        [self.curEngine setIntParam:4000 forKey:SE_PARAMS_KEY_VAD_HEAD_SILENCE_THRESHOLD_INT];
+        [self.curEngine setIntParam:2000 forKey:SE_PARAMS_KEY_VAD_TAIL_SILENCE_THRESHOLD_INT];
+        [self.curEngine setStringParam:[self getRecorderType] forKey:SE_PARAMS_KEY_RECORDER_TYPE_STRING];
+        [self.curEngine setStringParam:SE_VAD_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+        [self.curEngine setIntParam:16000 forKey:SE_PARAMS_KEY_SAMPLE_RATE_INT];
+
+        NSString* aedResourcePath = [[SpeechResourceManager shareInstance] getModelPath:SE_AED_MODEL];
+        NSLog(@"petrel aed resource path: %@", aedResourcePath);
+        [self.curEngine setStringParam:aedResourcePath forKey:SE_PARAMS_KEY_AED_RESOURCE_PATH_STRING];
+        
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            if ([self.streamRecorder getSampleRate] != 16000) {
+                [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ENABLE_RESAMPLER_BOOL];
+            }
+        }
+        
+        SEEngineErrorCode ret = [self.curEngine initEngine];
+        if (ret != SENoError) {
+            NSLog(@"Init Engine failed: %d", ret);
+        }
+        if (ret == SENoError) {
+            [self speechEngineInitOk];
+        } else {
+            [self speechEngineInitFailed:ret];
+        }
+    } fail:^{
+        [self speechEngineInitFailed:kSERDownloadFailed];
+    }];
+}
+
+- (NSString *)getRecorderType {
+    SettingOptions* recorderTypeOptions = [self.settings getOptions:SETTING_RECORD_TYPE];
+    switch (recorderTypeOptions.chooseIdx) {
+        case 0:
+            return SE_RECORDER_TYPE_RECORDER;
+        case 1:
+            return SE_RECORDER_TYPE_FILE;
+        case 2:
+            return SE_RECORDER_TYPE_STREAM;
+        default:
+            break;
+    }
+    return @"";
+}
+
+- (void)initOfflineModel:(void(^)(void))succ fail:(void(^)(void))fail {
+    NSString *model = SE_AED_MODEL;
+    SpeechResourceManager *speechResourceManager = [SpeechResourceManager shareInstance];
+    [speechResourceManager checkModelVersion:model completion:^(SEResourceStatus status, BOOL needUpdate, NSData *data) {
+        NSLog(@"Need update: %@", needUpdate ? @"YES" : @"NO");
+        if (status != kSERSuccess || needUpdate == NO) {
+            if ([speechResourceManager checkModelExist:model]) {
+                NSLog(@"Model exist!");
+                succ();
+            } else {
+                NSLog(@"Model not exist!");
+                fail();
+            }
+            return;
+        }
+        
+        // need to update model
+        [speechResourceManager fetchModelByName:model completion:^(SEResourceStatus status, NSData* data) {
+            NSLog(@"Completion: %@", status == kSERSuccess ? @"success" : @"fail");
+            if (status == kSERSuccess) {
+                succ();
+            } else {
+                NSLog(@"Failed: %d", status);
+                fail();
+            }
+        }];
+    }];
+}
+
+- (void)uninitEngine {
+    [self.curEngine destroyEngine];
+    self.curEngine = nil;
+    self.engineInitButton.enabled = TRUE;
+    self.engineUninitButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    self.longPressButton.enabled = FALSE;
+}
+
+#pragma mark - Engine Callback
+
+- (void)speechEngineNoPermission {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"No permission!"];
+        self.engineInitButton.enabled = TRUE;
+        self.engineUninitButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineInitOk {
+    [self.streamRecorder setSpeechEngine:self.curEngine];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.statusTextView setText:@"Ready"];
+        [self.resultTextView setText:[NSString stringWithFormat:@"DeviceID: %@", self.deviceID]];
+        self.engineUninitButton.enabled = TRUE;
+        self.engineInitButton.enabled = FALSE;
+        self.startEngineButton.enabled = TRUE;
+        self.longPressButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineInitFailed:(int)initStatus {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:[[NSString alloc] initWithFormat:@"Failed to init engine, %d!", initStatus]];
+        self.engineInitButton.enabled = TRUE;
+        self.engineUninitButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineStarted {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.engineStarted = true;
+        self.vadDuration = 0;
+        self.vadBeginPosition = 0;
+        self.vadEndPosition = 0;
+        [self.statusTextView setText:@"Engine Started!"];
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = TRUE;
+        self.longPressButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineStopped {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.streamRecorder stop];
+        }
+        self.engineStarted = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+        self.startEngineButton.enabled = TRUE;
+        self.stopEngineButton.enabled = FALSE;
+        self.longPressButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineError:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]];
+        [self stopEngine:nil];
+    });
+}
+
+- (void)messageVadBegin:(NSData *)data {
+    id json_obj = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
+    if ([json_obj isKindOfClass:[NSDictionary class]]) {
+        NSDictionary *vad_info = json_obj;
+        self.vadBeginPosition = [[vad_info objectForKey:@"start"] doubleValue];
+    }
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[NSString stringWithFormat:@"Vad begin, bos: %ld", self.vadBeginPosition]];
+    });
+}
+
+- (void)messasgeVadSpeech:(NSData *)data {
+    id json_obj = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
+    if ([json_obj isKindOfClass:[NSDictionary class]]) {
+        NSDictionary *vad_info = json_obj;
+        double currentSegEnd = [[vad_info objectForKey:@"end"] doubleValue];
+        if (currentSegEnd > self.vadEndPosition) {
+            self.vadEndPosition = currentSegEnd;
+        }
+    }
+}
+
+- (void)messageVadEnd:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[NSString stringWithFormat:@"Vad end, eos: %ld, speech duration: %ldms.", self.vadEndPosition, self.vadDuration/(2*16000/1000)]];
+        [self stopEngine:nil];
+    });
+}
+
+- (void)setResultText:(NSString *)result {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[result stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+    });
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_VAD forKey:@"viewId"];
+}
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/VoiceCloneViewController.h

@@ -0,0 +1,14 @@
+//
+//  VoiceCloneViewController.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2021/2/20.
+//  Copyright © 2021 chengzihao.ds. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface VoiceCloneViewController : UIViewController
+
+@end
+

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/VoiceCloneViewController.m

@@ -0,0 +1,649 @@
+//
+//  VoiceCloneViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2021/2/20.
+//  Copyright © 2021 chengzihao.ds. All rights reserved.
+//
+
+#import "VoiceCloneViewController.h"
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+
+@interface VoiceCloneViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+@property (weak, nonatomic) IBOutlet UITextView *referTextView;
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *engineSwitchButton;
+@property (weak, nonatomic) IBOutlet UIButton *getTaskButton;
+@property (weak, nonatomic) IBOutlet UIButton *checkEnvButton;
+@property (weak, nonatomic) IBOutlet UIButton *voiceRecordButton;
+@property (weak, nonatomic) IBOutlet UIButton *finishTalkingButton;
+@property (weak, nonatomic) IBOutlet UIButton *getTrainStatusButton;
+@property (weak, nonatomic) IBOutlet UIButton *submitTaskButton;
+@property (weak, nonatomic) IBOutlet UIButton *delTrainDataButton;
+@property (weak, nonatomic) IBOutlet UIButton *nextRecordTaskButton;
+
+@property (strong, nonatomic) SpeechEngine *curEngine;
+@property (assign, nonatomic) BOOL engineInited;
+@property (assign, nonatomic) BOOL engineStarted;
+
+@property (nonatomic, strong) NSString *deviceID;
+@property (nonatomic, assign) long talkingFinisheTimestamp;
+@property (nonatomic, assign) long startEngineTimestamp;
+@property (strong, nonatomic) NSString *debugPath;
+
+@property (weak, nonatomic) StreamRecorder *streamRecorder;
+
+// voiceclone json param
+@property (strong, nonatomic) NSString *voiceCloneCurText;
+@property (assign, nonatomic) NSInteger voiceCloneCurTextSeq;
+@property (assign, nonatomic) NSInteger voiceCloneCurTaskId;
+// voiceclone last get-task-info result
+@property (strong, nonatomic) NSMutableDictionary *voiceCloneTaskInfo;
+// ViewStatus
+typedef enum ViewStatus : NSUInteger {
+    BEFORE_INIT,
+    INITING,
+    BEFORE_GET_TASK,
+    BEFORE_CHECK_ENV,
+    BEFORE_RECORD,
+    RECORDING,
+    BEFORE_SUBMIT,
+    AFTER_SUBMIT,
+} ViewStatus;
+// prev ViewStatus
+@property (assign, nonatomic) ViewStatus preViewStatus;
+// current ViewStatus
+@property (assign, nonatomic) ViewStatus curViewStatus;
+
+// settings
+@property (strong, nonatomic) Settings *settings;
+
+@end
+
+@implementation VoiceCloneViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_VOICECLONE];
+
+    self.voiceCloneTaskInfo = NULL;
+    [self updateParamJsonObj];
+    
+    [self switchViewStatus:BEFORE_INIT];
+    [self decorateTextView:self.referTextView];
+    [self decorateTextView:self.resultTextView];
+    [self.referTextView setDelegate:self];
+    self.referTextView.editable = FALSE;
+    self.engineInited = FALSE;
+    self.engineStarted = FALSE;
+    self.streamRecorder = [ViewController getStreamRecorder];
+    [self.statusTextView setText:@"Waiting for init."];
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(appDidEnterBackground:)
+                                                 name:UIApplicationDidEnterBackgroundNotification
+                                               object:nil];
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(appWillTerminate:)
+                                                 name:UIApplicationWillTerminateNotification
+                                               object:nil];
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self uninitEngine];
+    [super viewDidDisappear:animated];
+}
+
+- (void)updateParamJsonObj {
+    if (self.voiceCloneTaskInfo != NULL) {
+        [[self.voiceCloneTaskInfo objectForKey:@"progress"]intValue];
+    } else {
+        [self updateParamJsonObj:0];
+    }
+}
+
+- (void)updateParamJsonObj:(int)text_seq {
+    if (self.voiceCloneTaskInfo == NULL) {
+        self.voiceCloneCurText = @"";
+        self.voiceCloneCurTextSeq = 0;
+        self.voiceCloneCurTaskId = [self.settings getInt:SETTING_VOICECLONE_TASKID];
+    } else {
+        NSArray *text_arr = [self.voiceCloneTaskInfo objectForKey:@"texts"];
+        self.voiceCloneCurText = [text_arr objectAtIndex:text_seq];
+        self.voiceCloneCurTextSeq = text_seq;
+        self.voiceCloneCurTaskId =[[self.voiceCloneTaskInfo objectForKey:@"task_id"]intValue];
+    }
+    // update refer text
+    [self.referTextView setText:[NSString stringWithFormat:@"Current task: %d\nCurrent task sequence: %d\nCurrent text: %@", (int)self.voiceCloneCurTaskId, (int)self.voiceCloneCurTextSeq, self.voiceCloneCurText]];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+- (void)switchViewStatus:(ViewStatus) status {
+    self.preViewStatus = self.curViewStatus;
+    self.curViewStatus = status;
+    switch (status) {
+        case BEFORE_INIT:
+            [self.engineSwitchButton setTitle:@"InitEngine" forState:UIControlStateNormal];
+            self.engineSwitchButton.enabled = TRUE;
+            self.getTaskButton.enabled = FALSE;
+            self.checkEnvButton.enabled = FALSE;
+            self.voiceRecordButton.enabled = FALSE;
+            self.finishTalkingButton.enabled = FALSE;
+            self.getTrainStatusButton.enabled = FALSE;
+            self.submitTaskButton.enabled = FALSE;
+            self.delTrainDataButton.enabled = FALSE;
+            self.nextRecordTaskButton.enabled = FALSE;
+            break;
+        case INITING:
+            [self.engineSwitchButton setTitle:@"InitEngine" forState:UIControlStateNormal];
+            self.engineSwitchButton.enabled = FALSE;
+            self.getTaskButton.enabled = FALSE;
+            self.checkEnvButton.enabled = FALSE;
+            self.voiceRecordButton.enabled = FALSE;
+            self.finishTalkingButton.enabled = FALSE;
+            self.getTrainStatusButton.enabled = FALSE;
+            self.submitTaskButton.enabled = FALSE;
+            self.delTrainDataButton.enabled = FALSE;
+            self.nextRecordTaskButton.enabled = FALSE;
+            break;
+        case RECORDING:
+            [self.engineSwitchButton setTitle:@"UninitEngine" forState:UIControlStateNormal];
+            self.engineSwitchButton.enabled = FALSE;
+            self.getTaskButton.enabled = FALSE;
+            self.checkEnvButton.enabled = FALSE;
+            self.voiceRecordButton.enabled = FALSE;
+            self.finishTalkingButton.enabled = TRUE;
+            self.getTrainStatusButton.enabled = FALSE;
+            self.submitTaskButton.enabled = FALSE;
+            self.delTrainDataButton.enabled = FALSE;
+            self.nextRecordTaskButton.enabled = FALSE;
+            break;
+        case BEFORE_GET_TASK:
+        case BEFORE_CHECK_ENV:
+        case BEFORE_RECORD:
+        case BEFORE_SUBMIT:
+        case AFTER_SUBMIT:
+            [self.engineSwitchButton setTitle:@"UninitEngine" forState:UIControlStateNormal];
+            self.engineSwitchButton.enabled = TRUE;
+            self.getTaskButton.enabled = TRUE;
+            self.checkEnvButton.enabled = TRUE;
+            self.voiceRecordButton.enabled = TRUE;
+            self.finishTalkingButton.enabled = FALSE;
+            self.getTrainStatusButton.enabled = TRUE;
+            self.submitTaskButton.enabled = TRUE;
+            self.delTrainDataButton.enabled = TRUE;
+            self.nextRecordTaskButton.enabled = TRUE;
+            break;
+        default:
+            break;
+    }
+}
+
+#pragma mark - Notifications
+
+- (void)appDidEnterBackground:(UIApplication *)application; {
+//    if (self.engineStarted) {
+//        [self stopEngine:nil];
+//    }
+}
+
+-(void)appWillTerminate:(NSNotification*)note {
+    [[NSNotificationCenter defaultCenter] removeObserver:self
+                                                    name:UIApplicationWillResignActiveNotification
+                                                  object:nil];
+    [[NSNotificationCenter defaultCenter] removeObserver:self
+                                                    name:UIApplicationWillTerminateNotification
+                                                  object:nil];
+}
+
+#pragma mark - SpeechEngineDelegate
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    switch (type) {
+        case SEEngineStart:
+            [self speechEngineStarted];
+            break;
+        case SEEngineStop:
+            [self speechEngineStopped];
+            break;
+        case SEEngineError:
+            [self speechEngineError:data];
+            break;
+        case SEVoiceCloneGetTaskResult:
+            [self speechVoiceCloneGetTaskResult:data];
+            break;
+        case SEVoiceCloneCheckEnvResult:
+            [self speechVoiceCloneCheckEnvResult:data];
+            break;
+        case SEVoiceCloneRecordVoiceResult:
+            [self speechVoiceCloneRecordVoiceResult:data];
+            break;
+        case SEVoiceCloneQueryStatusResult:
+            [self speechVoiceCloneQueryStatusResult:data];
+            break;
+        case SEVoiceCloneSubmitTaskResult:
+            [self speechVoiceCloneSubmitTaskResult:data];
+            break;
+        case SEVoiceCloneDeleteDataResult:
+            [self speechVoiceCloneDeleteDataResult:data];
+            break;
+        case SEEngineLog:
+            NSLog(@"engine log: %s", data.bytes);
+            break;
+        default:
+            break;
+    }
+}
+
+#pragma mark - UI Actions
+- (IBAction)switchEngine:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self.referTextView setText:@""];
+    self.voiceCloneTaskInfo = NULL;
+    [self updateParamJsonObj];
+    if (self.engineInited) {
+        [self uninitEngine];
+        self.engineInited = FALSE;
+        [self.statusTextView setText:@"Waiting for init."];
+        [self switchViewStatus:BEFORE_INIT];
+    } else {
+        [self switchViewStatus:INITING];
+        [self initEngine];
+    }
+}
+
+- (IBAction)stopEngine:(id)sender {
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+}
+
+- (IBAction)getTask:(id)sender {
+    [self.curEngine setStringParam:[self.settings getString:SETTING_VOICECLONE_UID] forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_VOICECLONE_GENDER] forKey:SE_PARAMS_KEY_VOICECLONE_GENDER_BOOL];
+    [self.curEngine sendDirective:SEDirectiveVoiceCloneGetTask];
+}
+
+- (IBAction)checkEnv:(id)sender {
+    if (![self checkRecorder]) {
+        return;
+    }
+    [self.curEngine setStringParam:[self.settings getString:SETTING_VOICECLONE_UID] forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setIntParam:self.voiceCloneCurTaskId forKey:SE_PARAMS_KEY_VOICECLONE_TASKID_INT];
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveVoiceCloneCheckEnv];
+    if (ret != SENoError) {
+        [self.resultTextView setText:[NSString stringWithFormat:@"checkEnv failed: %d", ret]];
+    } else {
+        [self switchViewStatus:RECORDING];
+    }
+}
+
+- (IBAction)voiceRecord:(id)sender {
+    if (![self checkRecorder]) {
+        return;
+    }
+    [self.curEngine setStringParam:[self.settings getString:SETTING_VOICECLONE_UID] forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setIntParam:self.voiceCloneCurTaskId forKey:SE_PARAMS_KEY_VOICECLONE_TASKID_INT];
+    [self.curEngine setStringParam:self.voiceCloneCurText forKey:SE_PARAMS_KEY_VOICECLONE_TEXT_STRING];
+    [self.curEngine setIntParam:self.voiceCloneCurTextSeq forKey:SE_PARAMS_KEY_VOICECLONE_TEXT_SEQ_INT];
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveVoiceCloneRecordVoice];
+    if (ret != SENoError) {
+        [self.resultTextView setText:[NSString stringWithFormat:@"voiceRecord failed: %d", ret]];
+    } else {
+        [self switchViewStatus:RECORDING];
+    }
+}
+
+- (IBAction)finishTalking:(id)sender {
+    [self.curEngine sendDirective:SEDirectiveFinishTalking];
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        [self.streamRecorder stop];
+    }
+}
+
+- (IBAction)getTrainStatus:(id)sender {
+    [self.curEngine setStringParam:[self.settings getString:SETTING_VOICECLONE_UID] forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setStringParam:[self.settings getString:SETTING_VOICECLONE_QUERY_UIDS] forKey:SE_PARAMS_KEY_VOICECLONE_QUERY_UIDS_STRING];
+    [self.curEngine sendDirective:SEDirectiveVoiceCloneQueryStatus];
+}
+
+- (IBAction)submitTask:(id)sender {
+    [self.curEngine setStringParam:[self.settings getString:SETTING_VOICECLONE_UID] forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setIntParam:self.voiceCloneCurTaskId forKey:SE_PARAMS_KEY_VOICECLONE_TASKID_INT];
+    [self.curEngine setStringParam:[self.settings getString:SETTING_VOICECLONE_VOICE_TYPE] forKey:SE_PARAMS_KEY_VOICECLONE_VOICE_TYPE_STRING];
+    [self.curEngine sendDirective:SEDirectiveVoiceCloneSubmitTask];
+}
+
+- (IBAction)delTrainData:(id)sender {
+    [self.curEngine setStringParam:[self.settings getString:SETTING_VOICECLONE_UID] forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setIntParam:self.voiceCloneCurTaskId forKey:SE_PARAMS_KEY_VOICECLONE_TASKID_INT];
+    [self.curEngine sendDirective:SEDirectiveVoiceCloneDeleteData];
+}
+
+- (IBAction)goToNextTaskInfo:(id)sender {
+    if (self.voiceCloneTaskInfo != NULL) {
+        NSArray *text_arr = [self.voiceCloneTaskInfo objectForKey:@"texts"];
+        if (text_arr.count != 0) {
+            [self updateParamJsonObj:((int)self.voiceCloneCurTextSeq + 1) % text_arr.count];
+            [self.resultTextView setText:@""];
+            return;
+        }
+    }
+    [self.resultTextView setText:@"You should get task info sucessfully first!"];
+}
+
+#pragma mark - Init Methods
+
+- (void)initEngine {
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    if (appDelegate.deviceID.length < 1) {
+        dispatch_async(dispatch_get_main_queue(), ^{
+            [self.statusTextView setText:@"Waiting for get deviceID."];
+            sleep(1);
+            [self initEngine];
+        });
+        return;
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+
+
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+    }
+    if (![self.curEngine createEngineWithDelegate:self]) {
+        NSLog(@"Create speech engine failed.");
+        return;
+    }
+
+    NSLog(@"Engine version: %@", [self.curEngine getVersion]);
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"Debug path: %@", self.debugPath);
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.curEngine setStringParam:[self.settings getString:SETTING_APPID] forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    [self.curEngine setStringParam:[self.settings getString:SETTING_TOKEN] forKey:SE_PARAMS_KEY_APP_TOKEN_STRING];
+    [self.curEngine setStringParam:SE_LOG_LEVEL_TRACE forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+    [self.curEngine setIntParam:1 forKey:SE_PARAMS_KEY_CHANNEL_NUM_INT];
+    [self.curEngine setStringParam:[self.settings getString:SETTING_VOICECLONE_ADDRESS] forKey:SE_PARAMS_KEY_VOICECLONE_ADDRESS_STRING];
+    [self.curEngine setStringParam:[self.settings getString:SETTING_VOICECLONE_STREAM_ADDRESS] forKey:SE_PARAMS_KEY_VOICECLONE_STREAM_ADDRESS_STRING];
+    [self.curEngine setStringParam:[self getRecorderType] forKey:SE_PARAMS_KEY_RECORDER_TYPE_STRING];
+    [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_VOICECLONE_ENABLE_DUMP_BOOL];
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_VOICECLONE_REC_PATH_STRING];
+    [self.curEngine setStringParam:SE_VOICECLONE_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_SAMPLE_RATE] forKey:SE_PARAMS_KEY_SAMPLE_RATE_INT];
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        if ([self.streamRecorder getSampleRate] != [self.settings getInt:SETTING_SAMPLE_RATE]) {
+            [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ENABLE_RESAMPLER_BOOL];
+        }
+    }
+
+    SEEngineErrorCode ret = [self.curEngine initEngine];
+    if (ret != SENoError) {
+        NSLog(@"Init Engine failed: %d", ret);
+    }
+    self.engineInited = (ret == SENoError);
+    if (self.engineInited) {
+        [self speechEngineInitOk];
+    } else {
+        [self speechEngineInitFailed];
+    }
+}
+
+- (void)uninitEngine {
+    [self.curEngine destroyEngine];
+    self.curEngine = nil;
+}
+
+- (bool)checkRecorder {
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        [self.curEngine setIntParam:[self.streamRecorder getSampleRate] forKey:SE_PARAMS_KEY_CUSTOM_SAMPLE_RATE_INT];
+        if (![self.streamRecorder start]) {
+            [self speechEngineNoPermission];
+            return false;
+        }
+    } else if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_FILE]) {
+        NSString* file_path = [NSString stringWithFormat:@"%@/%@", self.debugPath, @"voiceclone_rec_file.pcm"];
+        NSLog(@"test file path: %@", file_path);
+        [self.curEngine setStringParam:file_path forKey:SE_PARAMS_KEY_RECORDER_FILE_STRING];
+    }
+    return true;
+}
+
+- (NSString *)getRecorderType {
+    SettingOptions* recorderTypeOptions = [self.settings getOptions:SETTING_RECORD_TYPE];
+    switch (recorderTypeOptions.chooseIdx) {
+        case 0:
+            return SE_RECORDER_TYPE_RECORDER;
+        case 1:
+            return SE_RECORDER_TYPE_FILE;
+        case 2:
+            return SE_RECORDER_TYPE_STREAM;
+        default:
+            break;
+    }
+    return @"";
+}
+
+#pragma mark - Engine Callback
+
+- (void)speechEngineNoPermission {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"No permission!"];
+    });
+}
+
+- (void)speechEngineInitOk {
+    [self.streamRecorder setSpeechEngine:self.curEngine];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self switchViewStatus:BEFORE_GET_TASK];
+        [self.statusTextView setText:@"Ready"];
+        [self.resultTextView setText:[NSString stringWithFormat:@"DeviceID: %@", self.deviceID]];
+    });
+}
+
+- (void)speechEngineInitFailed {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self switchViewStatus:BEFORE_INIT];
+        [self uninitEngine];
+        [self.statusTextView setText:@"Failed to init engine!"];
+    });
+}
+
+- (void)speechEngineStarted {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.startEngineTimestamp = [[NSDate date] timeIntervalSince1970] * 1000;
+        self.engineStarted = true;
+        [self.statusTextView setText:@"Engine Started!"];
+    });
+}
+
+- (void)speechEngineStopped {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.streamRecorder stop];
+        }
+        self.engineStarted = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+        if (self.startEngineTimestamp > 0) {
+            long response_delay = [self timeDelayFrom:self.startEngineTimestamp];
+            self.startEngineTimestamp = 0;
+            [self.resultTextView setText:[NSString stringWithFormat:@"%@\nVoiceClone cost: %ld\n", self.resultTextView.text, response_delay]];
+        }
+    });
+}
+
+- (void)
+speechEngineError:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]];
+        [self stopEngine:nil];
+        if (self.curViewStatus == RECORDING) {
+            [self switchViewStatus:self.preViewStatus];
+        }
+    });
+}
+
+- (void)
+speechEngineResult:(NSString *)text {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:text];
+    });
+}
+
+- (void)speechVoiceCloneGetTaskResult:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        NSError *error;
+        NSArray *task_arr = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];
+        if (task_arr.count <= 0) {
+            [self.resultTextView setText:@"No task data!"];
+            return;
+        }
+        [self.resultTextView setText:@""];
+        self.voiceCloneCurTaskId = [self.settings getInt:SETTING_VOICECLONE_TASKID];
+        for (int i = 0; i < task_arr.count; ++i) {
+            NSDictionary *task_info = [task_arr objectAtIndex:i];
+            int task_id = [[task_info objectForKey:@"task_id"] intValue];
+            if ((int)self.voiceCloneCurTaskId == task_id) {
+                self.voiceCloneTaskInfo = [NSMutableDictionary dictionaryWithDictionary:task_info];
+                break;
+            }
+        }
+        // no match task_id
+        if (self.voiceCloneTaskInfo == NULL) {
+            self.voiceCloneTaskInfo = [task_arr objectAtIndex:0];
+            [self.resultTextView setText:[NSString stringWithFormat:@"Find task %d failed! Choose task: %d", (int)self.voiceCloneCurTaskId, [[self.voiceCloneTaskInfo objectForKey:@"task_id"] intValue]]];
+        }
+        // update task progress
+        int prog = [[self.voiceCloneTaskInfo objectForKey:@"progress"] intValue];
+        NSArray *texts_arr = [self.voiceCloneTaskInfo objectForKey:@"texts"];
+        [self updateParamJsonObj:(prog % texts_arr.count)];
+        if (prog < texts_arr.count && prog >= 0) {
+            [self.resultTextView setText:[NSString stringWithFormat:@"%@\nGet task info success!\nRecord task unfinished.\nGo to check environment", self.resultTextView.text]];
+            [self switchViewStatus:BEFORE_CHECK_ENV];
+        } else {
+            [self.resultTextView setText:[NSString stringWithFormat:@"%@\nGet task info success!\nRecord task finished!\nGo to submit task or query train status.", self.resultTextView.text]];
+            [self switchViewStatus:AFTER_SUBMIT];
+        }
+    });
+}
+
+- (void)speechVoiceCloneCheckEnvResult:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        NSError *error;
+        NSDictionary *env_info = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];
+        int status = [[env_info objectForKey:@"status"] intValue];
+        if (status > 0) {
+            [self.resultTextView setText:[NSString stringWithFormat:@"Checking...\nCurrent status: %d\nCurrent noise: %lf", status, [[env_info objectForKey:@"noise"] doubleValue]]];
+        } else if (status < 0) {
+            [self.resultTextView setText:[NSString stringWithFormat:@"Check failed! status: %d", status]];
+            [self switchViewStatus:BEFORE_CHECK_ENV];
+        } else {
+            [self.resultTextView setText:[NSString stringWithFormat:@"Check success! status: %d", status]];
+            [self switchViewStatus:BEFORE_RECORD];
+        }
+        
+    });
+}
+
+- (void)speechVoiceCloneRecordVoiceResult:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        NSError *error;
+        NSDictionary *record_res = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];
+        int status = [[record_res objectForKey:@"status"] intValue];
+        if (status > 0) {
+        } else if (status < 0) {
+            [self.resultTextView setText:[NSString stringWithFormat:@"Check failed! status: %d, wrong_index: %@", status, [record_res objectForKey:@"wrong_index"]]];
+            [self switchViewStatus:BEFORE_RECORD];
+        } else {
+            [self.resultTextView setText:[NSString stringWithFormat:@"Check success! status: %d", status]];
+            NSArray* text_arr = [self.voiceCloneTaskInfo objectForKey:@"texts"];
+            if (text_arr.count > 0 && self.voiceCloneCurTextSeq + 1 < text_arr.count) {
+                [self.resultTextView setText:[NSString stringWithFormat:@"Text %d success! status: %d", (int)self.voiceCloneCurTextSeq, status]];
+                [self switchViewStatus:BEFORE_RECORD];
+            } else {
+                [self.resultTextView setText:[NSString stringWithFormat:@"Voice record task: %d finished!\nGo to submit task!", (int)self.voiceCloneCurTaskId]];
+                [self switchViewStatus:BEFORE_SUBMIT];
+            }
+        }
+    });
+}
+
+- (void)speechVoiceCloneQueryStatusResult:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        NSError *error;
+        NSArray *train_status_arr = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];
+        [self.resultTextView setText:@""];
+        for (int i = 0; i < train_status_arr.count; ++i) {
+            NSDictionary *item = [train_status_arr objectAtIndex:i];
+            NSString *uid = [item objectForKey:@"uid"];
+            int status = [[item objectForKey:@"status"] intValue];
+            int task_id = [[item objectForKey:@"task_id"] intValue];
+            NSString *extra = [item objectForKey:@"extra"];
+            [self.resultTextView setText:[NSString stringWithFormat:@"%@%@: status: %d; task_id: %d; extra: %@\n\n", self.resultTextView.text, uid, status, task_id, extra]];
+        }
+    });
+}
+
+- (void)speechVoiceCloneSubmitTaskResult:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        NSError *error;
+        NSDictionary *result = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];
+        NSString *voiceType = [result objectForKey:@"voice_type"];
+        [self.resultTextView setText:[NSString stringWithFormat:@"Task submit success, voice type: %@", voiceType]];
+        [self switchViewStatus:AFTER_SUBMIT];
+    });
+}
+
+- (void)speechVoiceCloneDeleteDataResult:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:@"Task data del success"];
+    });
+}
+
+#pragma mark - Helper
+
+- (long)timeDelayFrom:(long)pastTimestamp {
+    return [[NSDate date] timeIntervalSince1970] * 1000 - pastTimestamp;
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_VOICECLONE forKey:@"viewId"];
+}
+
+@end
+

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/VoiceConvViewController.h

@@ -0,0 +1,15 @@
+//
+//  VoiceConvViewController.h
+//  SpeechDemo
+//
+//  Created by chengzihao.ds on 2021/4/1.
+//  Copyright © 2021 chengzihao.ds. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface VoiceConvViewController : UIViewController
+
+@end
+
+

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/VoiceConvViewController.m

@@ -0,0 +1,432 @@
+//
+//  VoiceConvViewController.m
+//  SpeechDemo
+//
+//  Created by chengzihao.ds on 2021/4/1.
+//  Copyright © 2021 chengzihao.ds. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "VoiceConvViewController.h"
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SensitiveDefines.h"
+
+@interface VoiceConvViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+@property (weak, nonatomic) IBOutlet UITextView *referTextView;
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *engineSwitchButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *finishTalkingButton;
+
+@property (strong, nonatomic) SpeechEngine *curEngine;
+@property (assign, nonatomic) BOOL signalEnabled;
+@property (assign, nonatomic) BOOL engineInited;
+@property (assign, nonatomic) BOOL engineStarted;
+
+@property (nonatomic, strong) NSString *deviceID;
+@property (nonatomic, assign) long talkingFinisheTimestamp;
+@property (nonatomic, assign) long startEngineTimestamp;
+@property (strong, nonatomic) NSString *debugPath;
+
+// ViewStatus
+typedef enum ViewStatus : NSUInteger {
+    BEFORE_INIT,
+    INITING,
+    BEFORE_START,
+    RECORDING,
+    WAITING_RESULT,
+} ViewStatus;
+
+// Recorder
+@property (weak, nonatomic) StreamRecorder *streamRecorder;
+@property (strong, nonatomic) NSString *recFilePath;
+@property (nonatomic, assign) long curResLength;
+@property (nonatomic, assign) long recFileLength;
+
+// settings
+@property (strong, nonatomic) Settings *settings;
+
+@end
+
+@implementation VoiceConvViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_VOICECONV];
+    
+    [self switchViewStatus:BEFORE_INIT];
+    [self decorateTextView:self.referTextView];
+    [self decorateTextView:self.resultTextView];
+    [self.referTextView setDelegate:self];
+    self.referTextView.editable = FALSE;
+    
+    self.engineInited = FALSE;
+    self.engineStarted = FALSE;
+    self.streamRecorder = [ViewController getStreamRecorder];
+    [self.statusTextView setText:@"Waiting for init."];
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(appDidEnterBackground:)
+                                                 name:UIApplicationDidEnterBackgroundNotification
+                                               object:nil];
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(appWillTerminate:)
+                                                 name:UIApplicationWillTerminateNotification
+                                               object:nil];
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self uninitEngine];
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+- (void)switchViewStatus:(ViewStatus) status {
+    switch (status) {
+        case BEFORE_INIT:
+            [self.engineSwitchButton setTitle:@"InitEngine" forState:UIControlStateNormal];
+            self.engineSwitchButton.enabled = TRUE;
+            self.startEngineButton.enabled = FALSE;
+            self.finishTalkingButton.enabled = FALSE;
+            break;
+        case INITING:
+            [self.engineSwitchButton setTitle:@"InitEngine" forState:UIControlStateNormal];
+            self.engineSwitchButton.enabled = FALSE;
+            self.startEngineButton.enabled = FALSE;
+            self.finishTalkingButton.enabled = FALSE;
+            break;
+        case BEFORE_START:
+            [self.engineSwitchButton setTitle:@"UninitEngine" forState:UIControlStateNormal];
+            self.engineSwitchButton.enabled = TRUE;
+            self.startEngineButton.enabled = TRUE;
+            self.finishTalkingButton.enabled = FALSE;
+            break;
+        case RECORDING:
+            [self.engineSwitchButton setTitle:@"UninitEngine" forState:UIControlStateNormal];
+            self.engineSwitchButton.enabled = TRUE;
+            self.startEngineButton.enabled = FALSE;
+            self.finishTalkingButton.enabled = TRUE;
+            break;
+        case WAITING_RESULT:
+            [self.engineSwitchButton setTitle:@"UninitEngine" forState:UIControlStateNormal];
+            self.engineSwitchButton.enabled = TRUE;
+            self.startEngineButton.enabled = FALSE;
+            self.finishTalkingButton.enabled = FALSE;
+            break;
+        default:
+            break;
+    }
+}
+
+#pragma mark - Notifications
+
+- (void)appDidEnterBackground:(UIApplication *)application; {
+//    if (self.engineStarted) {
+//        [self stopEngine:nil];
+//    }
+}
+
+-(void)appWillTerminate:(NSNotification*)note {
+    [[NSNotificationCenter defaultCenter] removeObserver:self
+                                                    name:UIApplicationWillResignActiveNotification
+                                                  object:nil];
+    [[NSNotificationCenter defaultCenter] removeObserver:self
+                                                    name:UIApplicationWillTerminateNotification
+                                                  object:nil];
+}
+
+#pragma mark - SpeechEngineDelegate
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    switch (type) {
+        case SEEngineStart:
+            [self speechEngineStarted];
+            break;
+        case SEEngineStop:
+            [self speechEngineStopped:data];
+            break;
+        case SEEngineError:
+            [self speechEngineError:data];
+            break;
+        case SEVoiceConvResultAudio:
+            [self speechResultAudio:data];
+            break;
+        case SEEngineLog:
+            NSLog(@"engine log: %s", data.bytes);
+            break;
+        default:
+            break;
+    }
+}
+
+#pragma mark - UI Actions
+- (IBAction)switchEngine:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    
+    if (self.engineInited) {
+        [self switchViewStatus:BEFORE_INIT];
+        [self uninitEngine];
+        self.engineInited = FALSE;
+        [self.statusTextView setText:@"Waiting for init."];
+        [self.engineSwitchButton setTitle:@"InitEngine" forState:UIControlStateNormal];
+    } else {
+        [self switchViewStatus:INITING];
+        [self initEngine];
+    }
+}
+
+- (IBAction)startEngine:(id)sender {
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        [self.curEngine setIntParam:[self.streamRecorder getSampleRate] forKey:SE_PARAMS_KEY_CUSTOM_SAMPLE_RATE_INT];
+        if (![self.streamRecorder start]) {
+            [self speechEngineNoPermission];
+            return;
+        }
+    } else if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_FILE]) {
+        // get file length
+        NSFileManager* manager = [NSFileManager defaultManager];
+        if ([manager fileExistsAtPath:self.recFilePath]){
+            self.recFileLength = [[manager attributesOfItemAtPath:self.recFilePath error:nil] fileSize];
+        }
+        NSLog(@"Open record file: %@, length: %ld", self.recFilePath, self.recFileLength);
+        self.curResLength = 0;
+        [self.curEngine setStringParam:self.recFilePath forKey:SE_PARAMS_KEY_RECORDER_FILE_STRING];
+    }
+        
+    [self.curEngine setStringParam:SDEF_UID forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setStringParam:[self.settings getString:SETTING_VOICE] forKey:SE_PARAMS_KEY_VOICECONV_VOICE_STRING];
+    [self.curEngine setStringParam:[self.settings getString:SETTING_VOICE_TYPE] forKey:SE_PARAMS_KEY_VOICECONV_VOICE_TYPE_STRING];
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_VOICECONV_RESULT_SAMPLE_RATE] forKey:SE_PARAMS_KEY_VOICECONV_RESULT_SAMPLE_RATE_INT];
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_VOICECONV_REQUEST_INTERVAL] forKey:SE_PARAMS_KEY_VOICECONV_REQUEST_INTERVAL_INT];
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+    
+    if (ret == SENoError) {
+        [self switchViewStatus:RECORDING];
+    } else {
+        [self.resultTextView setText:[NSString stringWithFormat:@"Start engine failed! ret: %d", ret]];
+    }
+}
+
+- (IBAction)stopEngine:(id)sender {
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        [self.streamRecorder stop];
+    }
+}
+
+- (IBAction)finishTalking:(id)sender {
+    [self.curEngine sendDirective:SEDirectiveFinishTalking];
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        [self.streamRecorder stop];
+    }
+    [self switchViewStatus:WAITING_RESULT];
+}
+
+#pragma mark - Init Methods
+
+- (void)initEngine {
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    if (appDelegate.deviceID.length < 1) {
+        dispatch_async(dispatch_get_main_queue(), ^{
+            [self.statusTextView setText:@"Waiting for get deviceID."];
+            sleep(1);
+            [self initEngine];
+        });
+        return;
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+
+
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+    }
+    if (![self.curEngine createEngineWithDelegate:self]) {
+        NSLog(@"Create speech engine failed.");
+        return;
+    }
+
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    self.recFilePath = [NSString stringWithFormat:@"%@/%@", self.debugPath, @"voiceconv_rec_file.pcm"];
+    NSLog(@"Engine version: %@", [self.curEngine getVersion]);
+    NSLog(@"Debug path: %@", self.debugPath);
+    
+    // recorder
+    SettingOptions *options = [self.settings getOptions:SETTING_RECORD_TYPE];
+    
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.curEngine setStringParam:SE_LOG_LEVEL_TRACE forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+    [self.curEngine setStringParam:@"test" forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    [self.curEngine setIntParam:1 forKey:SE_PARAMS_KEY_CHANNEL_NUM_INT];
+    [self.curEngine setIntParam:16000 forKey:SE_PARAMS_KEY_SAMPLE_RATE_INT];
+    [self.curEngine setStringParam:[self getRecorderType] forKey:SE_PARAMS_KEY_RECORDER_TYPE_STRING];
+    [self.curEngine setStringParam:SE_VOICECONV_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+    
+    [self.curEngine setStringParam:@"wss://speech-test.bytedance.com" forKey:SE_PARAMS_KEY_VOICECONV_ADDRESS_STRING];
+    [self.curEngine setStringParam:@"/api/v1/voice_conv/ws" forKey:SE_PARAMS_KEY_VOICECONV_URI_STRING];
+    [self.curEngine setStringParam:@"default" forKey:SE_PARAMS_KEY_VOICECONV_CLUSTER_STRING];
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_VOICECONV_ENABLE_RECORD_DUMP] forKey:SE_PARAMS_KEY_VOICECONV_ENABLE_RECORD_DUMP_BOOL];
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_VOICECONV_ENABLE_RESULT_DUMP] forKey:SE_PARAMS_KEY_VOICECONV_ENABLE_RESULT_DUMP_BOOL];
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_VOICECONV_AUDIO_PATH_STRING];
+    
+    if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+        if ([self.streamRecorder getSampleRate] != 16000) {
+            [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ENABLE_RESAMPLER_BOOL];
+        }
+    }
+
+    SEEngineErrorCode ret = [self.curEngine initEngine];
+    if (ret != SENoError) {
+        NSLog(@"Init Engine failed: %d", ret);
+    }
+    self.engineInited = (ret == SENoError);
+    if (self.engineInited) {
+        [self speechEngineInitOk];
+    } else {
+        [self speechEngineInitFailed];
+    }
+}
+
+- (void)uninitEngine {
+    [self.curEngine destroyEngine];
+    self.curEngine = nil;
+}
+
+- (NSString *)getRecorderType {
+    SettingOptions* recorderTypeOptions = [self.settings getOptions:SETTING_RECORD_TYPE];
+    switch (recorderTypeOptions.chooseIdx) {
+        case 0:
+            return SE_RECORDER_TYPE_RECORDER;
+        case 1:
+            return SE_RECORDER_TYPE_FILE;
+        case 2:
+            return SE_RECORDER_TYPE_STREAM;
+        default:
+            break;
+    }
+    return @"";
+}
+
+#pragma mark - Engine Callback
+
+- (void)speechEngineNoPermission {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"No permission!"];
+    });
+}
+
+- (void)speechEngineInitOk {
+    [self.streamRecorder setSpeechEngine:self.curEngine];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self switchViewStatus:BEFORE_START];
+        [self.statusTextView setText:@"Ready"];
+        [self.resultTextView setText:[NSString stringWithFormat:@"DeviceID: %@", self.deviceID]];
+    });
+}
+
+- (void)speechEngineInitFailed {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self switchViewStatus:BEFORE_INIT];
+        [self uninitEngine];
+        [self.statusTextView setText:@"Failed to init engine!"];
+    });
+}
+
+- (void)speechEngineStarted {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.startEngineTimestamp = [[NSDate date] timeIntervalSince1970] * 1000;
+        self.engineStarted = true;
+        [self.statusTextView setText:@"Engine Started!"];
+    });
+}
+
+- (void)speechEngineStopped:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_STREAM]) {
+            [self.streamRecorder stop];
+        }
+        // record result file
+        NSString* reqId = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
+        NSString* resultFile = [NSString stringWithFormat:@"voiceconv_%@.wav", reqId];
+        
+        self.engineStarted = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+        if (self.startEngineTimestamp > 0) {
+            long response_delay = [self timeDelayFrom:self.startEngineTimestamp];
+            self.startEngineTimestamp = 0;
+            [self.resultTextView setText:[NSString stringWithFormat:@"%@\nVoiceConv cost: %ld\nResult File: %@", self.resultTextView.text, response_delay, resultFile]];
+        }
+        [self switchViewStatus:BEFORE_START];
+    });
+}
+
+- (void)speechEngineError:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]];
+        [self stopEngine:nil];
+    });
+}
+
+- (void)speechResultAudio:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[NSString stringWithFormat:@"Get audio data, size: %ld", data.length]];
+        
+        // calculate progress
+        if ([[self getRecorderType] isEqualToString:SE_RECORDER_TYPE_FILE] && self.recFileLength != 0) {
+            self.curResLength += data.length;
+            long inputSampleRate = 16000;
+            long outputSampleRate = [self.settings getInt:SETTING_VOICECONV_RESULT_SAMPLE_RATE];
+            double progress = (double) self.curResLength / self.recFileLength * inputSampleRate / outputSampleRate;
+            [self.resultTextView setText:[NSString stringWithFormat:@"%@\nCurrent result length: %ld, total file length: %ld, progress: %lf", self.resultTextView.text, self.curResLength, self.recFileLength, progress]];
+            
+        }
+    });
+}
+
+#pragma mark - Helper
+
+- (long)timeDelayFrom:(long)pastTimestamp {
+    return [[NSDate date] timeIntervalSince1970] * 1000 - pastTimestamp;
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_VOICECONV forKey:@"viewId"];
+}
+
+@end
+

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/delegate/AppDelegate.h

@@ -0,0 +1,17 @@
+//
+//  AppDelegate.h
+//  SpeechDemo
+//
+//  Created by fangweiwei on 2019/12/6.
+//  Copyright © 2019 fangweiwei. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+#import "SpeechEngineToB/SpeechEngineToB-umbrella.h"
+
+@interface AppDelegate : UIResponder <UIApplicationDelegate>
+
+@property(nonatomic, strong) UIWindow *window;
+@property(nonatomic, readonly, strong) NSString *deviceID;
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/delegate/AppDelegate.m

@@ -0,0 +1,64 @@
+//
+//  AppDelegate.m
+//  SpeechDemo
+//
+//  Created by fangweiwei on 2019/12/6.
+//  Copyright © 2019 fangweiwei. All rights reserved.
+//
+
+#import "AppDelegate.h"
+#import "SensitiveDefines.h"
+
+
+
+@interface AppDelegate ()
+
+@property(nonatomic, readwrite, strong) NSString *deviceID;
+
+@end
+
+@implementation AppDelegate
+
+
+- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
+    UIDevice *device = [UIDevice currentDevice];
+    self.deviceID = [[device identifierForVendor] UUIDString];
+ 
+    // 完成网络环境等相关依赖配置，只需要调用一次。
+    BOOL status = [SpeechEngine prepareEnvironment];
+    if (status) {
+        [self setupResourceManager];
+    }
+    return status;
+}
+
+
+- (void) setupResourceManager {
+    NSLog(@"初始化模型资源管理器");
+    SpeechResourceManager *speechResourceManager = [SpeechResourceManager shareInstance];
+    [speechResourceManager setAppId:SDEF_APPID];
+    [speechResourceManager setAppVersion:@"1.0.0"];
+    [speechResourceManager setDeviceId:self.deviceID];
+    [speechResourceManager setRootPath: [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject stringByAppendingPathComponent:@"models"]];
+    [speechResourceManager setOnlineModelEnable:YES];
+    [speechResourceManager setup];
+}
+
+#pragma mark - UISceneSession lifecycle
+
+
+- (UISceneConfiguration *)application:(UIApplication *)application configurationForConnectingSceneSession:(UISceneSession *)connectingSceneSession options:(UISceneConnectionOptions *)options  API_AVAILABLE(ios(13.0)){
+    // Called when a new scene session is being created.
+    // Use this method to select a configuration to create the new scene with.
+    return [[UISceneConfiguration alloc] initWithName:@"Default Configuration" sessionRole:connectingSceneSession.role];
+}
+
+
+- (void)application:(UIApplication *)application didDiscardSceneSessions:(NSSet<UISceneSession *> *)sceneSessions  API_AVAILABLE(ios(13.0)){
+    // Called when the user discards a scene session.
+    // If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.
+    // Use this method to release any resources that were specific to the discarded scenes, as they will not return.
+}
+
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/delegate/SceneDelegate.h

@@ -0,0 +1,16 @@
+//
+//  SceneDelegate.h
+//  SpeechDemo
+//
+//  Created by fangweiwei on 2019/12/6.
+//  Copyright © 2019 fangweiwei. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface SceneDelegate : UIResponder <UIWindowSceneDelegate>
+
+@property (strong, nonatomic) UIWindow * window;
+
+@end
+

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/delegate/SceneDelegate.m

@@ -0,0 +1,50 @@
+#import "SceneDelegate.h"
+
+@interface SceneDelegate ()
+
+@end
+
+@implementation SceneDelegate
+
+
+- (void)scene:(UIScene *)scene willConnectToSession:(UISceneSession *)session options:(UISceneConnectionOptions *)connectionOptions  API_AVAILABLE(ios(13.0)){
+    // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
+    // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
+    // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
+}
+
+
+- (void)sceneDidDisconnect:(UIScene *)scene  API_AVAILABLE(ios(13.0)){
+    // Called as the scene is being released by the system.
+    // This occurs shortly after the scene enters the background, or when its session is discarded.
+    // Release any resources associated with this scene that can be re-created the next time the scene connects.
+    // The scene may re-connect later, as its session was not neccessarily discarded (see `application:didDiscardSceneSessions` instead).
+}
+
+
+- (void)sceneDidBecomeActive:(UIScene *)scene  API_AVAILABLE(ios(13.0)){
+    // Called when the scene has moved from an inactive state to an active state.
+    // Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
+}
+
+
+- (void)sceneWillResignActive:(UIScene *)scene  API_AVAILABLE(ios(13.0)){
+    // Called when the scene will move from an active state to an inactive state.
+    // This may occur due to temporary interruptions (ex. an incoming phone call).
+}
+
+
+- (void)sceneWillEnterForeground:(UIScene *)scene  API_AVAILABLE(ios(13.0)){
+    // Called as the scene transitions from the background to the foreground.
+    // Use this method to undo the changes made on entering the background.
+}
+
+
+- (void)sceneDidEnterBackground:(UIScene *)scene  API_AVAILABLE(ios(13.0)){
+    // Called as the scene transitions from the foreground to the background.
+    // Use this method to save data, release shared resources, and store enough scene-specific state information
+    // to restore the scene back to its current state.
+}
+
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/settings/SettingViewDelegate.h

@@ -0,0 +1,67 @@
+//
+//  SettingViewDelegate.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2021/3/26.
+//  Copyright © 2021 chengzihao.ds. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import <UIKit/UIKit.h>
+#import "Settings.h"
+
+#pragma mark - SettingItemCell
+@interface SettingItemCell : UITableViewCell<UITextFieldDelegate>
+@property (weak, nonatomic) Settings *settings;
+@property (weak, nonatomic) UITableView* parent;
+
+-(void)init:(Settings*)settings parent:(UITableView*)parent;
+-(SettingItem*)getCorrespondItem;
+
+- (BOOL)textFieldShouldReturn:(UITextField *)textField;
+@end
+
+#pragma mark - SettingBoolCell
+@interface SettingBoolCell : SettingItemCell
+@property (weak, nonatomic) IBOutlet UILabel *keyLabel;
+@property (weak, nonatomic) IBOutlet UISwitch *valSwitch;
+
+-(void)switchAction:(UISwitch*)sender;
+@end
+
+#pragma mark - SettingIntCell
+@interface SettingNumberCell : SettingItemCell
+@property (weak, nonatomic) IBOutlet UILabel *keyLabel;
+@property (weak, nonatomic) IBOutlet UITextField *valTextField;
+
+-(void)textFieldDidChange :(UITextField *)textField;
+@end
+
+#pragma mark - SettingStringCell
+@interface SettingStringCell : SettingItemCell
+@property (weak, nonatomic) IBOutlet UILabel *keyLabel;
+@property (weak, nonatomic) IBOutlet UITextField *valTextField;
+
+-(void)textFieldDidChange :(UITextField *)textField;
+@end
+
+#pragma mark - SettingOptionsCell
+@interface SettingOptionsCell : SettingItemCell<UIPickerViewDelegate, UIPickerViewDataSource>
+
+@property (weak, nonatomic) IBOutlet UILabel *keyLabel;
+@property (weak, nonatomic) IBOutlet UITextField *valTextField;
+@property (strong, nonatomic) UIPickerView *pickerView;
+@property (strong, nonatomic) UIToolbar *pickerToolbar;
+
+-(void)pickerConfirm;
+-(void)pickerCancel;
+@end
+
+#pragma mark - SettingViewDelegate
+@interface SettingViewDelegate : NSObject<UITableViewDelegate, UITableViewDataSource>
+@property (strong, nonatomic) Settings* settings;
+
++ (instancetype)build:(Settings*)settings;
+
+@end
+

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/settings/SettingViewDelegate.m

@@ -0,0 +1,280 @@
+//
+//  SettingViewDelegate.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2021/3/26.
+//  Copyright © 2021 chengzihao.ds. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "SettingViewDelegate.h"
+
+#pragma mark - SettingItemCell
+@implementation SettingItemCell
+
+-(void)init:(Settings*)settings parent:(UITableView*)parent {
+    self.settings = settings;
+    self.parent = parent;
+}
+
+-(SettingItem*)getCorrespondItem {
+    NSIndexPath* path = [self.parent indexPathForCell:self];
+    NSMutableArray* group = self.settings.configs[path.section];
+    return group[path.row];
+}
+
+// auto close keyboard when click return
+- (BOOL)textFieldShouldReturn:(UITextField *)textField {
+    [textField resignFirstResponder];
+    return NO;
+}
+@end
+
+
+#pragma mark - SettingBoolCell
+@implementation SettingBoolCell
+
+-(void)init:(Settings*)settings parent:(UITableView*)parent {
+    [super init:settings parent:parent];
+    [self.valSwitch addTarget:self action:@selector(switchAction:) forControlEvents:UIControlEventValueChanged];
+}
+
+-(void)switchAction:(UISwitch*)sender {
+    SettingItem* item = [self getCorrespondItem];
+    [self.settings setBool:item.key val:sender.isOn];
+}
+
+@end
+
+#pragma mark - SettingNumberCell
+@implementation SettingNumberCell
+
+-(void)init:(Settings*)settings parent:(UITableView*)parent {
+    [super init:settings parent:parent];
+    self.valTextField.delegate = self;
+    [self.valTextField addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
+}
+
+-(void)textFieldDidChange :(UITextField *)textField {
+    SettingItem* item = [self getCorrespondItem];
+    // if input empty, do nothing
+    if ([textField.text length] > 0) {
+        [self.settings setDouble:item.key val:[textField.text doubleValue]];
+    }
+}
+
+@end
+
+#pragma mark - SettingStringCell
+@implementation SettingStringCell
+
+-(void)init:(Settings*)settings parent:(UITableView*)parent {
+    [super init:settings parent:parent];
+    self.valTextField.delegate = self;
+    [self.valTextField addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
+}
+
+-(void)textFieldDidChange :(UITextField *)textField {
+    SettingItem* item = [self getCorrespondItem];
+    [self.settings setString:item.key val:textField.text];
+}
+
+@end
+
+#pragma mark - SettingOptionsCell
+@implementation SettingOptionsCell
+
+-(void)init:(Settings*)settings parent:(UITableView*)parent {
+    [super init:settings parent:parent];
+
+    // init picker view
+    self.pickerView = [[UIPickerView alloc] init];
+    self.pickerView.dataSource = self;
+    self.pickerView.delegate = self;
+
+    // init picker toolbar
+    self.pickerToolbar = [[UIToolbar alloc]initWithFrame:
+                          CGRectMake(0, self.frame.size.height-
+                                     self.pickerView.frame.size.height-20, self.bounds.size.width, 40)];
+    UIBarButtonItem *confirmBtn = [[UIBarButtonItem alloc] initWithTitle:@"Confirm" style:UIBarButtonItemStyleDone target:self action:@selector(pickerConfirm)];
+    UIBarButtonItem *flexibleBBI = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
+    [self.pickerToolbar setBarStyle:UIBarStyleDefault];
+    NSArray *toolbarItems = [NSArray arrayWithObjects:flexibleBBI, confirmBtn, nil];
+    [self.pickerToolbar setItems:toolbarItems];
+    
+    // show pickerView
+    self.valTextField.delegate = self;
+    self.valTextField.inputView = self.pickerView;
+    self.valTextField.inputAccessoryView = self.pickerToolbar;
+}
+
+// PickerView width
+- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component {
+    return self.bounds.size.width;
+}
+
+// PickerView select event
+- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
+    SettingItem* item = [self getCorrespondItem];
+    SettingOptions* options = (SettingOptions*)item.value;
+    options.chooseIdx = (int)row;
+    [self.settings setOptions:item.key val:options];
+    [self.valTextField setText:options.optionsArray[row]];
+}
+
+// PickerView show options
+-(NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
+    SettingItem* item = [self getCorrespondItem];
+    SettingOptions* options = (SettingOptions*)item.value;
+    return options.optionsArray[row];
+}
+
+// PickerView column number
+- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
+    return 1;
+}
+
+// PickerView row number for each column
+- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
+    SettingItem* item = [self getCorrespondItem];
+    return ((SettingOptions*)item.value).optionsArray.count;
+}
+
+// PickerToolbar confirm button click event
+-(void)pickerConfirm {
+    if ([self.valTextField isFirstResponder]) {
+        [self.valTextField resignFirstResponder];
+    }
+}
+@end
+
+#pragma mark - SettingViewDelegate
+
+@implementation SettingViewDelegate
+
+static NSString* nibName = @"SpeechSettingItem";
+static CGFloat sectionHeaderHeight = 30;
+static CGFloat sectionFooterHeight = 30;
+
++ (instancetype)build:(Settings*)settings {
+    SettingViewDelegate* instance = [[self alloc] init];
+    instance.settings = settings;
+    return instance;
+}
+
+// row number for each section
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
+    NSMutableArray *curGroup = _settings.configs[section];
+    NSLog(@"numberOfRowsInSection %ld", curGroup.count);
+    return curGroup.count;
+}
+
+// section number
+- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
+    NSLog(@"numberOfSectionsInTableView %ld", _settings.groups.count);
+    return _settings.groups.count;
+}
+
+// section title
+- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
+    SettingItem *groupItem = _settings.groups[section];
+    return groupItem.key;
+}
+
+// section header height
+- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
+    return sectionHeaderHeight;
+}
+
+// section footer height
+- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section {
+    return sectionFooterHeight;
+}
+
+// generate TableViewCell
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
+    UITableViewCell* cell;
+    NSMutableArray* group = _settings.configs[indexPath.section];
+    SettingItem* item = group[indexPath.row];
+    
+    NSString *CellTableIndentifier = NULL;
+    switch (item.type) {
+        case kSettingBool:
+            {
+                CellTableIndentifier = @"SettingBool";
+                SettingBoolCell* bCell = [tableView dequeueReusableCellWithIdentifier:CellTableIndentifier];
+                if(bCell == nil) {
+                    NSArray * nib = [[NSBundle mainBundle] loadNibNamed:nibName owner:self options:nil];
+                    bCell = [nib objectAtIndex:item.type];
+                    [bCell init:_settings parent:tableView];
+                }
+                [bCell.keyLabel setText:item.key];
+                [bCell.valSwitch setOn:[(NSNumber*)item.value intValue] == 1];
+                
+                cell = bCell;
+            }
+            break;
+        case kSettingNumber:
+            {
+                CellTableIndentifier = @"SettingNumber";
+                SettingNumberCell *iCell = [tableView dequeueReusableCellWithIdentifier:CellTableIndentifier];
+                if(iCell == nil) {
+                    NSArray * nib = [[NSBundle mainBundle] loadNibNamed:nibName owner:self options:nil];
+                    iCell = [nib objectAtIndex:item.type];
+                    [iCell init:_settings parent:tableView];
+                }
+                [iCell.keyLabel setText:item.key];
+                [iCell.valTextField setText:[(NSNumber*)item.value stringValue]];
+                [iCell.valTextField setPlaceholder:(NSString*)item.hint];
+                
+                cell = iCell;
+            }
+            break;
+        case kSettingString:
+            {
+                CellTableIndentifier = @"SettingString";
+                SettingStringCell *sCell = [tableView dequeueReusableCellWithIdentifier:CellTableIndentifier];
+                if(sCell == nil) {
+                    NSArray * nib = [[NSBundle mainBundle] loadNibNamed:nibName owner:self options:nil];
+                    sCell = [nib objectAtIndex:item.type];
+                    [sCell init:_settings parent:tableView];
+                }
+                [sCell.keyLabel setText:item.key];
+                [sCell.valTextField setText:(NSString*)item.value];
+                [sCell.valTextField setPlaceholder:(NSString*)item.hint];
+                
+                cell = sCell;
+            }
+            break;
+        case kSettingOptions:
+            {
+                CellTableIndentifier = @"SettingOptions";
+                SettingOptionsCell *oCell = [tableView dequeueReusableCellWithIdentifier:CellTableIndentifier];
+                if(oCell == nil) {
+                    NSArray * nib = [[NSBundle mainBundle] loadNibNamed:nibName owner:self options:nil];
+                    oCell = [nib objectAtIndex:item.type];
+                    [oCell init:_settings parent:tableView];
+                }
+                SettingOptions *options = (SettingOptions*)item.value;
+                [oCell.keyLabel setText:item.key];
+                [oCell.valTextField setText:options.optionsArray[options.chooseIdx]];
+                [oCell.valTextField setPlaceholder:item.hint];
+                
+                cell = oCell;
+            }
+            break;
+        default:
+            NSLog(@"Unsupported SettingType: %ld", item.type);
+            break;
+    }
+    cell.accessibilityIdentifier = item.key;
+    return cell;
+}
+
+@synthesize description;
+
+@synthesize hash;
+
+@synthesize superclass;
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/settings/Settings.h

@@ -0,0 +1,83 @@
+//
+//  Settings.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2021/3/26.
+//  Copyright © 2021 chengzihao.ds. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+#pragma mark - SettingType
+typedef NS_ENUM(NSInteger, SettingType) {
+    kSettingGroup = 0,
+    kSettingBool = 1,
+    kSettingNumber = 2,
+    kSettingString = 3,
+    kSettingOptions = 4,
+};
+
+#pragma mark - SettingOptions
+@interface SettingOptions : NSObject
+@property (strong, nonatomic) NSArray* optionsArray;
+@property (assign, nonatomic) int chooseIdx;
+
++ (instancetype)build:(NSArray*)ops choose:(int)idx;
+@end
+
+#pragma mark - SettingItem
+@interface SettingItem : NSObject
+@property (assign, nonatomic) SettingType type;
+@property (strong, nonatomic) NSString* key;
+@property (strong, nonatomic) NSObject* value;
+@property (strong, nonatomic) NSString* hint;
+
++ (instancetype)build:(SettingType)type key:(NSString*)key val:(NSObject*)val hint:(NSString*)hint;
+
++ (instancetype)buildGroup:(NSString*)key val:(NSString*)val hint:(NSString*)hint;
++ (instancetype)buildBool:(NSString*)key val:(BOOL)val hint:(NSString*)hint;
++ (instancetype)buildInt:(NSString *)key val:(int)val hint:(NSString *)hint;
++ (instancetype)buildDouble:(NSString *)key val:(double)val hint:(NSString *)hint;
++ (instancetype)buildString:(NSString*)key val:(NSString*)val hint:(NSString*)hint;
++ (instancetype)buildOptions:(NSString*)key val:(SettingOptions*)val hint:(NSString*)hint;
+@end
+
+#pragma mark - Settings
+@interface Settings : NSObject
+// kSettingGroup type, use SettingItem 1 dimension array.
+@property (strong, nonatomic) NSMutableArray* groups;
+// other type, use SettingItem 2 dimension array. 1st dimension for each group, 2nd dimension for detail SettingItem in group.
+@property (strong, nonatomic) NSMutableArray* configs;
+
++ (instancetype)build;
+
+- (void)registerItems:(NSArray*)cfgs;
+
+- (void)setBool:(NSString*)key;
+- (void)setBool:(NSString*)key val:(BOOL)val;
+- (void)setInt:(NSString*)key;
+- (void)setInt:(NSString*)key val:(int)val;
+- (void)setDouble:(NSString*)key;
+- (void)setDouble:(NSString*)key val:(double)val;
+- (void)setString:(NSString*)key;
+- (void)setString:(NSString*)key val:(NSString*)val;
+- (void)setOptions:(NSString*)key;
+- (void)setOptions:(NSString*)key val:(SettingOptions*)val;
+
+- (BOOL)getBool:(NSString*)key;
+- (BOOL)getBool:(NSString*)key def:(BOOL)def;
+- (int)getInt:(NSString*)key;
+- (int)getInt:(NSString*)key def:(int)def;
+- (double)getDouble:(NSString*)key;
+- (double)getDouble:(NSString*)key def:(double)def;
+- (NSString*)getString:(NSString*)key;
+- (NSString*)getString:(NSString*)key def:(NSString*)def;
+- (SettingOptions*)getOptions:(NSString*)key;
+- (SettingOptions*)getOptions:(NSString*)key def:(SettingOptions*)def;
+- (NSString*)getOptionsValue:(NSString*)key;
+
+@end
+
+NS_ASSUME_NONNULL_END
+

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/settings/Settings.m

@@ -0,0 +1,260 @@
+//
+//  Settings.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2021/3/26.
+//  Copyright © 2021 chengzihao.ds. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "Settings.h"
+
+#pragma mark - SettingOptions
+@implementation SettingOptions
+
++ (instancetype)build:(NSArray*)ops choose:(int)idx {
+    SettingOptions* instance = [[self alloc] init];
+    instance.optionsArray = ops;
+    instance.chooseIdx = idx;
+    return instance;
+}
+
+@end
+
+#pragma mark - SettingItem
+@implementation SettingItem
+
++ (instancetype)build:(SettingType)type key:(NSString*)key val:(NSObject*)val hint:(NSString*)hint {
+    SettingItem* instance = [[self alloc] init];
+    instance.key = key;
+    instance.type = type;
+    instance.value = val;
+    instance.hint = hint;
+    return instance;
+}
+
++ (instancetype)buildGroup:(NSString*)key val:(NSString*)val hint:(NSString*)hint {
+    return [SettingItem build:kSettingGroup key:key val:val hint:hint];
+}
+
++ (instancetype)buildBool:(NSString*)key val:(BOOL)val hint:(NSString*)hint {
+    return [SettingItem build:kSettingBool key:key val:val ? @1 : @0 hint:hint];
+}
+
++ (instancetype)buildInt:(NSString*)key val:(int)val hint:(NSString*)hint {
+    return [SettingItem build:kSettingNumber key:key val:[NSNumber numberWithInt:val] hint:hint];
+}
+
++ (instancetype)buildDouble:(NSString*)key val:(double)val hint:(NSString*)hint {
+    return [SettingItem build:kSettingNumber key:key val:[NSNumber numberWithDouble:val] hint:hint];
+}
+
++ (instancetype)buildString:(NSString*)key val:(NSString*)val hint:(NSString*)hint {
+    return [SettingItem build:kSettingString key:key val:val hint:hint];
+}
+
++ (instancetype)buildOptions:(NSString*)key val:(SettingOptions*)val hint:(NSString*)hint {
+    return [SettingItem build:kSettingOptions key:key val:val hint:hint];
+}
+
+@end
+
+#pragma mark - Settings
+@implementation Settings
+
++ (instancetype)build {
+    Settings* instance = [[self alloc] init];
+    instance.groups = [[NSMutableArray alloc]init];
+    instance.configs = [[NSMutableArray alloc]init];
+    // configs has at least one group
+    [instance.configs addObject:[[NSMutableArray alloc] init]];
+    return instance;
+}
+
+- (void)setItem:(SettingItem*)item {
+    if (item.type == kSettingGroup) {
+        // group type
+        for (int i = 0; i < _groups.count; ++i) {
+            SettingItem* groupItem = _groups[i];
+            if ([groupItem.key isEqualToString:item.key]) {
+                // same group exist, do nothing
+                return;
+            }
+        }
+        
+        [_groups addObject:item];
+        
+        NSMutableArray* group = _configs[0];
+        if (_configs.count == 1 && group.count == 0) {
+            // first group has no items yet, means this is first group
+            return;
+        }
+        // append new group
+        [_configs addObject:[[NSMutableArray alloc] init]];
+        return;
+    } else {
+        // other type
+        NSMutableArray* group = NULL;
+        for (int i = 0; i < _configs.count; ++i) {
+            group = _configs[i];
+            for (int j = 0; j < group.count; ++j) {
+                SettingItem* cur = group[j];
+                if ([cur.key isEqualToString:item.key]) {
+                    _configs[i][j] = item;
+                    return;
+                }
+            }
+        }
+        // default add to last group
+        [group addObject:item];
+    }
+}
+
+- (SettingItem*)getItem:(NSString*)key type:(SettingType)type {
+    if (type == kSettingGroup) {
+        // group type
+        for (int i = 0; i < _groups.count; ++i) {
+            SettingItem* cur = _groups[i];
+            if ([cur.key isEqualToString:key]) {
+                return cur;
+            }
+        }
+        return NULL;
+    } else {
+        // other type
+        for (int i = 0; i < _configs.count; ++i) {
+            NSMutableArray* group = _configs[i];
+            for (int j = 0; j < group.count; ++j) {
+                SettingItem* cur = group[j];
+                if ([cur.key isEqualToString:key]) {
+                    if (cur.type == type) {
+                        return cur;
+                    }
+                    return NULL;
+                }
+            }
+        }
+        return NULL;
+    }
+    return NULL;
+}
+
+- (void)registerItems:(NSArray*)cfgs {
+    for (int i = 0; i < cfgs.count; ++i) {
+        [self setItem:cfgs[i]];
+    }
+}
+
+- (void)setBool:(NSString*)key {
+    [self setBool:key val:false];
+}
+
+- (void)setBool:(NSString*)key val:(BOOL)val {
+    [self setItem:[SettingItem buildBool:key val:val hint:@""]];
+}
+
+- (void)setInt:(NSString*)key {
+    [self setInt:key val:0];
+}
+
+- (void)setInt:(NSString*)key val:(int)val {
+    [self setItem:[SettingItem buildInt:key val:val hint:@""]];
+}
+
+- (void)setDouble:(NSString*)key {
+    [self setDouble:key val:0.];
+}
+
+- (void)setDouble:(NSString*)key val:(double)val {
+    [self setItem:[SettingItem buildDouble:key val:val hint:@""]];
+}
+
+- (void)setString:(NSString*)key {
+    [self setString:key val:@""];
+}
+
+- (void)setString:(NSString*)key val:(NSString*)val {
+    [self setItem:[SettingItem buildString:key val:val hint:@""]];
+}
+
+- (void)setOptions:(NSString*)key {
+    [self setOptions:key val:[SettingOptions build:@[] choose:0]];
+}
+
+- (void)setOptions:(NSString*)key val:(SettingOptions*)val {
+    [self setItem:[SettingItem buildOptions:key val:val hint:@""]];
+}
+
+- (BOOL)getBool:(NSString*)key {
+    return [self getBool:key def:false];
+}
+
+- (BOOL)getBool:(NSString*)key def:(BOOL)def {
+    SettingItem* item = [self getItem:key type:kSettingBool];
+    if (item != NULL) {
+        NSNumber* val = (NSNumber*)item.value;
+        return [val intValue] == 1;
+    }
+    return def;
+}
+
+- (int)getInt:(NSString*)key {
+    return [self getInt:key def:0];
+}
+
+- (int)getInt:(NSString*)key def:(int)def {
+    SettingItem* item = [self getItem:key type:kSettingNumber];
+    if (item != NULL) {
+        NSNumber* val = (NSNumber*)item.value;
+        return [val intValue];
+    }
+    return def;
+}
+
+- (double)getDouble:(NSString*)key {
+    return [self getDouble:key def:0];
+}
+
+- (double)getDouble:(NSString*)key def:(double)def {
+    SettingItem* item = [self getItem:key type:kSettingNumber];
+    if (item != NULL) {
+        NSNumber* val = (NSNumber*)item.value;
+        return [val doubleValue];
+    }
+    return def;
+}
+
+- (NSString*)getString:(NSString*)key {
+    return [self getString:key def:@""];
+}
+
+- (NSString*)getString:(NSString*)key def:(NSString*)def {
+    SettingItem* item = [self getItem:key type:kSettingString];
+    if (item != NULL) {
+        return (NSString*)item.value;
+    }
+    return def;
+}
+
+- (SettingOptions*)getOptions:(NSString*)key {
+    return [self getOptions:key def:[SettingOptions build:@[] choose:0]];
+}
+
+- (SettingOptions*)getOptions:(NSString*)key def:(SettingOptions*)def {
+    SettingItem* item = [self getItem:key type:kSettingOptions];
+    if (item != NULL) {
+        return (SettingOptions*)item.value;
+    }
+    return def;
+}
+
+- (NSString*)getOptionsValue:(NSString*)key {
+    SettingItem* item = [self getItem:key type:kSettingOptions];
+    if (item != NULL) {
+        SettingOptions *options = (SettingOptions*)item.value;
+        return options.optionsArray[options.chooseIdx];
+    }
+    return @"";
+}
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/settings/SettingsHelper.h

@@ -0,0 +1,207 @@
+//
+//  SettingsHelper.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/9.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "Settings.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+#pragma mark - SETTING_KEY
+
+// view id
+extern NSString *const VIEW_ASR;
+extern NSString *const VIEW_ASR_OFFLINE;
+extern NSString *const VIEW_AU;
+extern NSString *const VIEW_BIGASR;
+extern NSString *const VIEW_AFP;
+extern NSString *const VIEW_CAPT;
+extern NSString *const VIEW_FULLLINK;
+extern NSString *const VIEW_TTS;
+extern NSString *const VIEW_BITTS;
+extern NSString *const VIEW_UNITTS;
+extern NSString *const VIEW_VOICECLONE;
+extern NSString *const VIEW_VOICECONV;
+extern NSString *const VIEW_DIALOG;
+extern NSString *const VIEW_DIALOG_DELEGATE;
+extern NSString *const VIEW_VAD;
+extern NSString *const VIEW_KWS;
+extern NSString *const VIEW_TEST_AFP;
+extern NSString *const VIEW_TEST_ASR_OFFLINE_RTF;
+extern NSString *const VIEW_TEST_ASR_STRESS;
+
+// common
+extern NSString *const SETTING_COMMON;
+extern NSString *const SETTING_APPID;
+extern NSString *const SETTING_APPKEY;
+extern NSString *const SETTING_TOKEN;
+extern NSString *const SETTING_CLUSTER;
+extern NSString *const SETTING_RESOURCE_ID;
+extern NSString *const SETTING_ADDRESS;
+extern NSString *const SETTING_URI;
+extern NSString *const SETTING_VOICE;
+extern NSString *const SETTING_VOICE_TYPE;
+extern NSString *const SETTING_ONLINE_VOICE;
+extern NSString *const SETTING_ONLINE_VOICE_TYPE;
+extern NSString *const SETTING_OFFLINE_VOICE;
+extern NSString *const SETTING_OFFLINE_VOICE_TYPE;
+extern NSString *const SETTING_GET_VOLUME;
+extern NSString *const SETTING_RECORD_TYPE;
+extern NSString *const SETTING_RECORD_SAVE;
+extern NSString *const SETTING_RECORD_FILE_TYPE;
+extern NSString *const SETTING_SAMPLE_RATE;
+extern NSString *const SETTING_CHANNEL;
+extern NSString *const SETTING_ENABLE_AEC;
+extern NSString *const SETTING_RESTART_AUDIO_SESSION_ENABLE;
+extern NSString *const SETTING_RESUME_OTHERS_INTERRUPTED_PLAYBACK_ENABLE;
+extern NSString *const SETTING_LICENSE_NAME;
+extern NSString *const SETTING_LICENSE_BUSI_ID;
+extern NSString *const SETTING_AUTHENTICATION_TYPE;
+extern NSString *const SETTING_BUSINESS_KEY;
+extern NSString *const SETTING_AUTHENTICATE_SECRET;
+extern NSString *const SETTING_DISABLE_WS_RECONNECT;
+extern NSString *const SETTING_AUDIO_FADEOUT_DURATION;
+extern NSString *const SETTING_VAD_MAX_SPEECH_DURATION;
+extern NSString *const SETTING_VAD_MAX_MUSIC_DURATION;
+extern NSString *const SETTING_STREAM_PACKAGE_DURATION;
+extern NSString *const SETTING_REQUEST_HEADERS;
+extern NSString *const SETTING_ENABLE_PLAYER_AUDIO_CALL_BACK;
+
+// asr
+extern NSString *const SETTING_ASR;
+extern NSString *const SETTING_ASR_RECORDER_SAVE;
+extern NSString *const SETTING_ASR_ENABLE_DDC;
+extern NSString *const SETTING_ASR_ENABLE_ITN;
+extern NSString *const SETTING_ASR_ENABLE_NLU_PUNC;
+extern NSString *const SETTING_ASR_DISABLE_END_PUNC;
+extern NSString *const SETTING_ASR_KEEP_RECORDING;
+extern NSString *const SETTING_ASR_HOTWORDS;
+extern NSString *const SETTING_ASR_CORRECTWORDS;
+extern NSString *const SETTING_ASR_VAD_START_SILENCE_TIME;
+extern NSString *const SETTING_ASR_VAD_END_SILENCE_TIME;
+extern NSString *const SETTING_ASR_VAD_MODE;
+extern NSString *const SETTING_ASR_RESULT_TYPE;
+extern NSString *const SETTING_ASR_MAX_RETRY_TIMES;
+extern NSString *const SETTING_ASR_SHOW_LANGUAGE;
+extern NSString *const SETTING_ASR_LANGUAGE;
+extern NSString *const SETTING_ASR_AUTO_STOP;
+extern NSString *const SETTING_ASR_MODEL_NAME;
+extern NSString *const SETTING_ASR_REQ_PARAMS;
+extern NSString *const SETTING_ASR_ENABLE_RESOURCE_DOWNLOAD;
+
+// capt
+extern NSString *const SETTING_CAPT;
+extern NSString *const SETTING_CAPT_RECORDER_SAVE;
+extern NSString *const SETTING_CAPT_STREAMING_MODE;
+extern NSString *const SETTING_CAPT_CORE_TYPE;
+extern NSString *const SETTING_CAPT_DIFFICULTY_LEVEL;
+
+// fulllink
+extern NSString *const SETTING_FULLLINK;
+extern NSString *const SETTING_FULLLINK_ENGINE_TYPE;
+extern NSString *const SETTING_FULLLINK_WAKEUP_WORDS;
+extern NSString *const SETTING_FULLLINK_ENABLE_RECORDER_DUMP;
+extern NSString *const SETTING_FULLLINK_ENABLE_KWS_DUMP;
+extern NSString *const SETTING_FULLLINK_WAKEUP_MODE;
+extern NSString *const SETTING_FULLLINK_ONLY_ASR;
+extern NSString *const SETTING_FULLLINK_DISABLE_TTS;
+extern NSString *const SETTING_FULLLINK_DISABLE_SIGNAL;
+extern NSString *const SETTING_FULLLINK_DISABLE_DEVICE_TYPE;
+extern NSString *const SETTING_FULLLINK_DISABLE_SIGTHREAD_PRI;
+extern NSString *const SETTING_FULLLINK_DISABLE_FILE_OR_DIRECTORY_NAME;
+
+// tts
+extern NSString *const SETTING_TTS;
+extern NSString *const SETTING_TTS_ONLINE_LANGUAGE;
+extern NSString *const SETTING_TTS_OFFLINE_LANGUAGE;
+extern NSString *const SETTING_PREVENT_PLAYER_CREATION;
+extern NSString *const SETTING_TTS_ENABLE_RESUME_FROM_BREAKPOINT;
+extern NSString *const SETTING_TTS_ENABLE_PLAYER;
+extern NSString *const SETTING_TTS_ENABLE_DUMP;
+extern NSString *const SETTING_TTS_ENABLE_DATA_CALLBACK;
+extern NSString *const SETTING_TTS_ENABLE_WORD_LEVEL_PROGRESS_UPDATE;
+extern NSString *const SETTING_TTS_ENABLE_CACHE;
+extern NSString *const SETTING_TTS_WITH_INTENT;
+extern NSString *const SETTING_TTS_LIMIT_CPU_USAGE;
+extern NSString *const SETTING_TTS_TEXT_TYPE;
+extern NSString *const SETTING_TTS_WORK_MODE;
+extern NSString *const SETTING_TTS_SPEAK_SPEED;
+extern NSString *const SETTING_TTS_AUDIO_VOLUME;
+extern NSString *const SETTING_TTS_AUDIO_PITCH;
+extern NSString *const SETTING_TTS_SAMPLE_RATE;
+extern NSString *const SETTING_TTS_EMOTION;
+extern NSString *const SETTING_TTS_MODEL_NAME;
+extern NSString *const SETTING_TTS_SILENCE_DURATION;
+extern NSString *const SETTING_TTS_OFFLINE_RESOURCE_FORMAT;
+extern NSString *const SETTING_TTS_BACKEND_CLUSTER;
+extern NSString *const SETTING_TTS_REQUEST_ID;
+extern NSString *const SETTING_TTS_REQUEST_PARAMS;
+extern NSString *const SETTING_TTS_SILENCE_DURATION;
+extern NSString *const SETTING_TTS_USE_VOICECLONE_VOICE;
+
+// voiceclone
+extern NSString *const SETTING_VOICECLONE;
+extern NSString *const SETTING_VOICECLONE_ADDRESS;
+extern NSString *const SETTING_VOICECLONE_STREAM_ADDRESS;
+extern NSString *const SETTING_VOICECLONE_UID;
+extern NSString *const SETTING_VOICECLONE_QUERY_UIDS;
+extern NSString *const SETTING_VOICECLONE_VOICE_TYPE;
+extern NSString *const SETTING_VOICECLONE_GENDER;
+extern NSString *const SETTING_VOICECLONE_TASKID;
+
+// voiceconv
+extern NSString *const SETTING_VOICECONV;
+extern NSString *const SETTING_VOICECONV_RESULT_SAMPLE_RATE;
+extern NSString *const SETTING_VOICECONV_ENABLE_RECORD_DUMP;
+extern NSString *const SETTING_VOICECONV_ENABLE_RESULT_DUMP;
+extern NSString *const SETTING_VOICECONV_REQUEST_INTERVAL;
+
+// dialog
+extern NSString *const SETTING_DIALOG;
+extern NSString *const SETTING_DIALOG_ENABLE_RECORDER_DUMP;
+extern NSString *const SETTING_DIALOG_ENABLE_PLAYER_DUMP;
+extern NSString *const SETTING_DIALOG_BOT_NAME;
+
+// vad
+extern NSString *const SETTING_VAD;
+extern NSString *const SETTING_VAD_RECORDER_SAVE;
+extern NSString *const SETTING_VAD_HEAD_SILENCE_THRESHOLD;
+extern NSString *const SETTING_VAD_TAIL_SILENCE_THRESHOLD;
+
+// au
+extern NSString *const SETTING_AU;
+extern NSString *const SETTING_AU_ABILITY;
+extern NSString *const SETTING_AU_RECORDER_SAVE;
+extern NSString *const SETTING_AU_PROCESS_TIMEOUT;
+extern NSString *const SETTING_AU_AUDIO_PACKET_DURATION;
+extern NSString *const SETTING_AU_EMPTY_PACKET_INTERVAL;
+
+// afp
+extern NSString *const SETTING_AFP;
+extern NSString *const SETTING_MUSIC_ENGINE_NAME;
+extern NSString *const SETTING_AFP_RESULT_TYPE;
+extern NSString *const SETTING_AFP_INSTANCE_NUMBER;
+
+// kws
+extern NSString *const SETTING_KWS;
+extern NSString *const SETTING_KWS_CUSTOM_WORDS;
+extern NSString *const SETTING_KWS_MODEL_NAME;
+
+// asr test
+extern NSString *const SETTING_ASR_STRESS;
+extern NSString *const SETTING_ASR_STRESS_SCENEID;
+
+#pragma mark - SETTING_HELPER
+@interface SettingsHelper : NSObject
+
++ (instancetype)shareInstance;
+
+- (Settings*)getSettings:(NSString*)engine;
+
+@end
+
+NS_ASSUME_NONNULL_END

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/settings/SettingsHelper.m

@@ -0,0 +1,804 @@
+//
+//  SettingsHelper.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/9.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SensitiveDefines.h"
+
+
+@interface SettingsHelper()
+@property (strong, nonatomic) Settings* asrSettings;
+@property (strong, nonatomic) Settings* asrOfflineSettings;
+@property (strong, nonatomic) Settings* bigAsrSettings;
+@property (strong, nonatomic) Settings* captSettings;
+@property (strong, nonatomic) Settings* fulllinkSettings;
+@property (strong, nonatomic) Settings* ttsSettings;
+@property (strong, nonatomic) Settings* voiceCloneSettings;
+@property (strong, nonatomic) Settings* voiceConvSettings;
+@property (strong, nonatomic) Settings* dialogSettings;
+@property (strong, nonatomic) Settings* bittsSettings;
+@property (strong, nonatomic) Settings* uniTtsSettings;
+@property (strong, nonatomic) Settings* dialogDelegateSettings;
+@property (strong, nonatomic) Settings* vadSettings;
+@property (strong, nonatomic) Settings* auSettings;
+@property (strong, nonatomic) Settings* afpSettings;
+@property (strong, nonatomic) Settings* kwsSettings;
+@property (strong, nonatomic) Settings* testAfpSettings;
+@property (strong, nonatomic) Settings* testAsrOfflineRtfSettings;
+@property (strong, nonatomic) Settings* testAsrStressSettings;
+@end
+
+@implementation SettingsHelper
+
+#pragma mark - SETTING_KEY
+
+// view id
+NSString *const VIEW_ASR = @"ASR";
+NSString *const VIEW_ASR_OFFLINE = @"ASR_OFFLINE";
+NSString *const VIEW_AU = @"AU";
+NSString *const VIEW_BIGASR = @"BIGASR";
+NSString *const VIEW_AFP = @"AFP";
+NSString *const VIEW_CAPT = @"CAPT";
+NSString *const VIEW_FULLLINK = @"FULLLINK";
+NSString *const VIEW_TTS = @"TTS";
+NSString *const VIEW_BITTS = @"BITTS";
+NSString *const VIEW_UNITTS = @"UNITTS";
+NSString *const VIEW_VOICECLONE = @"VOICECLONE";
+NSString *const VIEW_VOICECONV = @"VOICECONV";
+NSString *const VIEW_DIALOG = @"DIALOG";
+NSString *const VIEW_DIALOG_DELEGATE = @"DIALOG_DELEGATE";
+NSString *const VIEW_VAD = @"VAD";
+NSString *const VIEW_KWS = @"KWS";
+NSString *const VIEW_TEST_AFP = @"AFP_TEST";
+NSString *const VIEW_TEST_ASR_OFFLINE_RTF = @"TEST_ASR_OFFLINE_RTF";
+NSString *const VIEW_TEST_ASR_STRESS = @"TEST_ASR_STRESS";
+
+// common
+NSString *const SETTING_COMMON = @"Common";
+NSString *const SETTING_APPID = @"AppID";
+NSString *const SETTING_APPKEY = @"AppKey";
+NSString *const SETTING_TOKEN = @"Token";
+NSString *const SETTING_CLUSTER = @"Cluster";
+NSString *const SETTING_RESOURCE_ID = @"ResourceId";
+NSString *const SETTING_ADDRESS = @"Address";
+NSString *const SETTING_URI = @"Uri";
+NSString *const SETTING_VOICE = @"Voice";
+NSString *const SETTING_VOICE_TYPE = @"Voice Type";
+NSString *const SETTING_ONLINE_VOICE = @"Online Voice";
+NSString *const SETTING_ONLINE_VOICE_TYPE = @"Online Voice Type";
+NSString *const SETTING_OFFLINE_VOICE = @"Offline Voice";
+NSString *const SETTING_OFFLINE_VOICE_TYPE = @"Offline Voice Type";
+NSString *const SETTING_GET_VOLUME = @"Get Volume";
+NSString *const SETTING_RECORD_TYPE = @"Record Type";
+NSString *const SETTING_RECORD_SAVE = @"Record Save";
+NSString *const SETTING_RECORD_FILE_TYPE = @"Record File Type";
+NSString *const SETTING_SAMPLE_RATE = @"Sample Rate";
+NSString *const SETTING_CHANNEL = @"Channel";
+NSString *const SETTING_ENABLE_AEC = @"Enable Aec";
+NSString *const SETTING_RESTART_AUDIO_SESSION_ENABLE = @"Restart AudioSession";
+NSString *const SETTING_RESUME_OTHERS_INTERRUPTED_PLAYBACK_ENABLE = @"Resume Others Interrupted Playback";
+NSString *const SETTING_AUTHENTICATION_TYPE = @"Authentication Type";
+NSString *const SETTING_BUSINESS_KEY = @"Business Key";
+NSString *const SETTING_AUTHENTICATE_SECRET = @"Authenticate Secret";
+NSString *const SETTING_DISABLE_WS_RECONNECT = @"Disable Ws Reconnect";
+NSString *const SETTING_AUDIO_FADEOUT_DURATION = @"Audio Fade Out Duration";
+NSString *const SETTING_VAD_MAX_SPEECH_DURATION = @"Vad Max Speech Duration";
+NSString *const SETTING_VAD_MAX_MUSIC_DURATION = @"Vad Max Music Duration";
+NSString *const SETTING_STREAM_PACKAGE_DURATION = @"Stream Package Duration";
+NSString *const SETTING_REQUEST_HEADERS = @"Request headers";
+NSString *const SETTING_ENABLE_PLAYER_AUDIO_CALL_BACK = @"Enable player audio callback";
+// asr
+NSString *const SETTING_ASR = @"Asr";
+NSString *const SETTING_ASR_RECORDER_SAVE = @"Asr Recorder Save";
+NSString *const SETTING_ASR_ENABLE_DDC = @"Asr Enable Ddc";
+NSString *const SETTING_ASR_ENABLE_ITN = @"Asr Enable Itn";
+NSString *const SETTING_ASR_ENABLE_NLU_PUNC = @"Asr Enable nlu punctuation";
+NSString *const SETTING_ASR_DISABLE_END_PUNC = @"asr_disable_end_punc";
+NSString *const SETTING_ASR_KEEP_RECORDING = @"Asr Enable Keep Recording";
+NSString *const SETTING_ASR_HOTWORDS = @"Asr HotWords";
+NSString *const SETTING_ASR_CORRECTWORDS = @"Asr CorrectWords";
+NSString *const SETTING_ASR_VAD_START_SILENCE_TIME = @"Asr Vad Start Silence Time";
+NSString *const SETTING_ASR_VAD_END_SILENCE_TIME = @"Asr Vad End Silence Time";
+NSString *const SETTING_ASR_VAD_MODE = @"Asr VAD Mode";
+NSString *const SETTING_ASR_RESULT_TYPE = @"Asr Result Type";
+NSString *const SETTING_ASR_MAX_RETRY_TIMES = @"Asr Max Retry Times";
+NSString *const SETTING_ASR_SHOW_LANGUAGE = @"Asr Show Language";
+NSString *const SETTING_ASR_LANGUAGE = @"Asr Language";
+NSString *const SETTING_ASR_AUTO_STOP = @"Asr Auto Stop";
+NSString *const SETTING_ASR_MODEL_NAME = @"Asr Model Name";
+NSString *const SETTING_ASR_REQ_PARAMS = @"Asr Request Params";
+NSString *const SETTING_ASR_ENABLE_RESOURCE_DOWNLOAD = @"Enable Asr Resource Download";
+
+// capt
+NSString *const SETTING_CAPT = @"Capt";
+NSString *const SETTING_CAPT_RECORDER_SAVE = @"Capt Recorder Save";
+NSString *const SETTING_CAPT_STREAMING_MODE = @"Capt Streaming Mode";
+NSString *const SETTING_CAPT_CORE_TYPE = @"Capt Core Type";
+NSString *const SETTING_CAPT_DIFFICULTY_LEVEL = @"Capt Difficulty Level";
+
+// fulllink
+NSString *const SETTING_FULLLINK = @"Fulllink";
+NSString *const SETTING_FULLLINK_ENGINE_TYPE = @"Fulllink Engine Type";
+NSString *const SETTING_FULLLINK_WAKEUP_WORDS = @"Fulllink Wakeup Words";
+NSString *const SETTING_FULLLINK_ENABLE_RECORDER_DUMP = @"Fulllink Enable Recorder Dump";
+NSString *const SETTING_FULLLINK_ENABLE_KWS_DUMP = @"Fulllink Enable Kws Dump";
+NSString *const SETTING_FULLLINK_WAKEUP_MODE = @"Fulllink Wakeup Mode";
+NSString *const SETTING_FULLLINK_ONLY_ASR = @"Fulllink Only Asr";
+NSString *const SETTING_FULLLINK_DISABLE_TTS = @"Fulllink Disable Tts";
+NSString *const SETTING_FULLLINK_DISABLE_SIGNAL = @"Fulllink Disable Signal";
+NSString *const SETTING_FULLLINK_DISABLE_DEVICE_TYPE = @"Fulllink Device Type";
+NSString *const SETTING_FULLLINK_DISABLE_SIGTHREAD_PRI = @"Fulllink Disable SigThread Pri";
+NSString *const SETTING_FULLLINK_DISABLE_FILE_OR_DIRECTORY_NAME = @"Fulllink Disable File Or Directory Name";
+
+// tts
+NSString *const SETTING_TTS = @"Tts";
+NSString *const SETTING_TTS_ONLINE_LANGUAGE = @"Tts online Language";
+NSString *const SETTING_TTS_EMOTION = @"Tts emotion";
+NSString *const SETTING_TTS_OFFLINE_LANGUAGE = @"Tts offline Language";
+NSString *const SETTING_PREVENT_PLAYER_CREATION = @"Prevent Player Creation";
+NSString *const SETTING_TTS_ENABLE_RESUME_FROM_BREAKPOINT = @"Tts Enable Resume From Breakpoint";
+NSString *const SETTING_TTS_ENABLE_PLAYER = @"Tts Enable Player";
+NSString *const SETTING_TTS_ENABLE_DUMP = @"Tts Enable Dump";
+NSString *const SETTING_TTS_ENABLE_DATA_CALLBACK = @"Tts Enable Data Callback";
+NSString *const SETTING_TTS_ENABLE_WORD_LEVEL_PROGRESS_UPDATE = @"Tts Enable Word level Progress Update";
+NSString *const SETTING_TTS_ENABLE_CACHE = @"Tts Enable Cache";
+NSString *const SETTING_TTS_WITH_INTENT = @"Tts With Intent Predication";
+NSString *const SETTING_TTS_LIMIT_CPU_USAGE = @"Tts Limit Cpu Usage";
+NSString *const SETTING_TTS_TEXT_TYPE = @"Tts Text Type";
+NSString *const SETTING_TTS_WORK_MODE = @"Tts Synthesis Mode";
+NSString *const SETTING_TTS_SPEAK_SPEED = @"Tts Speak Speed";
+NSString *const SETTING_TTS_AUDIO_VOLUME = @"Tts Audio Volume";
+NSString *const SETTING_TTS_AUDIO_PITCH = @"Tts Audio Pitch";
+NSString *const SETTING_TTS_SAMPLE_RATE = @"Tts Sample Rate";
+NSString *const SETTING_TTS_MODEL_NAME = @"Tts Model Name";
+NSString *const SETTING_LICENSE_NAME = @"License Name";
+NSString *const SETTING_LICENSE_BUSI_ID = @"Busi Id";
+NSString *const SETTING_TTS_BACKEND_CLUSTER = @"Backend Cluster";
+NSString *const SETTING_TTS_REQUEST_ID = @"Tts Request ID";
+NSString *const SETTING_TTS_REQUEST_PARAMS = @"Tts Request Parameters";
+NSString *const SETTING_TTS_USE_VOICECLONE_VOICE = @"Tts Use VoiceClone Voice";
+NSString *const SETTING_TTS_SILENCE_DURATION = @"Tts Silence Duration";
+NSString *const SETTING_TTS_OFFLINE_RESOURCE_FORMAT = @"TTS Offline Model Format";
+
+// voiceclone
+NSString *const SETTING_VOICECLONE = @"VoiceClone";
+NSString *const SETTING_VOICECLONE_ADDRESS = @"VoiceClone Address";
+NSString *const SETTING_VOICECLONE_STREAM_ADDRESS = @"VoiceClone Stream Address";
+NSString *const SETTING_VOICECLONE_UID = @"VoiceClone Uid";
+NSString *const SETTING_VOICECLONE_QUERY_UIDS = @"VoiceClone Query Uids";
+NSString *const SETTING_VOICECLONE_VOICE_TYPE = @"VoiceClone Voice Type";
+NSString *const SETTING_VOICECLONE_GENDER = @"VoiceClone Gender (Is Female)";
+NSString *const SETTING_VOICECLONE_TASKID = @"VoiceClone Taskid";
+
+// voiceconv
+NSString *const SETTING_VOICECONV = @"VoiceConv";
+NSString *const SETTING_VOICECONV_RESULT_SAMPLE_RATE = @"VoiceConv Result Sample Rate";
+NSString *const SETTING_VOICECONV_ENABLE_RECORD_DUMP = @"VoiceConv Enable Record Dump";
+NSString *const SETTING_VOICECONV_ENABLE_RESULT_DUMP = @"VoiceConv Enable Result Dump";
+NSString *const SETTING_VOICECONV_REQUEST_INTERVAL = @"VoiceConv Request Interval (Unit: ms)";
+
+// dialog
+NSString *const SETTING_DIALOG = @"Dialog";
+NSString *const SETTING_DIALOG_ENABLE_RECORDER_DUMP = @"Dialog Recorder Dump";
+NSString *const SETTING_DIALOG_ENABLE_PLAYER_DUMP = @"Dialog Player Dump";
+NSString *const SETTING_DIALOG_BOT_NAME = @"Dialog Bot Name";
+
+// bitts
+NSString *const SETTING_BITTS = @"BiTTS";
+
+// unitts
+NSString *const SETTING_UNITTS = @"UniTTS";
+
+// vad
+NSString *const SETTING_VAD = @"Vad";
+NSString *const SETTING_VAD_RECORDER_SAVE = @"Vad Recorder Save";
+NSString *const SETTING_VAD_HEAD_SILENCE_THRESHOLD = @"Vad Head silence Threshold";
+NSString *const SETTING_VAD_TAIL_SILENCE_THRESHOLD = @"Vad Tail silence Threshold";
+
+// au
+NSString *const SETTING_AU = @"Au";
+NSString *const SETTING_AU_ABILITY = @"Au Ability";
+NSString *const SETTING_AU_RECORDER_SAVE = @"Au Recorder Save";
+NSString *const SETTING_AU_PROCESS_TIMEOUT = @"Au Process Timeout";
+NSString *const SETTING_AU_AUDIO_PACKET_DURATION = @"Au Audio Packet Duration";
+NSString *const SETTING_AU_EMPTY_PACKET_INTERVAL = @"Au Empty Packet Interval";
+
+// afp
+NSString *const SETTING_AFP = @"Afp";
+NSString *const SETTING_MUSIC_ENGINE_NAME = @"Music engine name";
+NSString *const SETTING_AFP_RESULT_TYPE = @"Afp result type";
+NSString *const SETTING_AFP_INSTANCE_NUMBER = @"Afp instance number";
+
+// kws
+NSString *const SETTING_KWS = @"Kws";
+NSString *const SETTING_KWS_CUSTOM_WORDS = @"Kws Custom Words";
+NSString *const SETTING_KWS_MODEL_NAME = @"Kws Model Name";
+
+// asr test
+NSString *const SETTING_ASR_STRESS = @"Asr Stress";
+NSString *const SETTING_ASR_STRESS_SCENEID = @"Asr Stress Sceneid";
+
+#pragma mark - SETTING_HINT
+static NSString *const SETTING_HINT_CLUSTER = @"Cluster";
+static NSString *const SETTING_HINT_BACKEND_CLUSTER = @"Backend Cluster";
+static NSString *const SETTING_HINT_ADDRESS = @"Address";
+static NSString *const SETTING_HINT_URI = @"Uri";
+static NSString *const SETTING_HINT_VOICE = @"Voice";
+static NSString *const SETTING_HINT_VOICE_TYPE = @"Voice Type";
+static NSString *const SETTING_HINT_ONLINE_VOICE = @"Online Voice";
+static NSString *const SETTING_HINT_ONLINE_VOICE_TYPE = @"Online Voice Type";
+static NSString *const SETTING_HINT_OFFLINE_VOICE = @"Offline Voice";
+static NSString *const SETTING_HINT_OFFLINE_VOICE_TYPE = @"Offline Voice Type";
+static NSString *const SETTING_HINT_TTS_ONLINE_LANGUAGE = @"Tts online Language";
+static NSString *const SETTING_HINT_TTS_EMOTION = @"Tts emotion";
+static NSString *const SETTING_HINT_TTS_OFFLINE_LANGUAGE = @"Tts offline Language";
+static NSString *const SETTING_HINT_DIFFICULTY_LEVEL = @"Support 1,2,3";
+static NSString *const SETTING_HINT_VOICECLONE_UID = @"VoiceClone Uid";
+static NSString *const SETTING_HINT_VOICECLONE_QUERY_UIDS = @"VoiceClone Query Uids";
+static NSString *const SETTING_HINT_VOICECLONE_VOICE_TYPE = @"VoiceClone Voice Type";
+static NSString *const SETTING_HINT_BUSINESS_KEY = @"Business Key";
+static NSString *const SETTING_HINT_AUTHENTICATE_SECRET = @"Authenticate Secret";
+static NSString *const SETTING_HINT_LICENSE_NAME = @"Input license name";
+static NSString *const SETTING_HINT_LICENSE_BUSI_ID = @"Input busi id";
+static NSString *const SETTING_HINT_TTS_SAMPLE_RATE = @"Input tts sample rate";
+static NSString *const SETTING_HINT_TTS_MODEL_NAME = @"Input Tts Model Name";
+static NSString *const SETTING_HINT_MAX_CACHE_NUM = @"Input max number of client audio cache, such as 100.";
+static NSString *const SETTING_HINT_TTS_CACHE_RENEWAL_DURATION = @"Input cache renewal duration, unit:ms";
+
+#pragma mark - SETTING_OPTIONS
+static NSArray* SETTING_OPTIONS_RECORD_TYPE(void) {
+    return @[@"Recorder", @"File", @"Stream"];
+}
+static NSArray* SETTING_OPTIONS_RECORD_FILE_TYPE(void) {
+    return @[@"Wav", @"Aac"];
+}
+static NSArray* SETTING_OPTIONS_ASR_RESULT_TYPE(void) {
+    return @[@"full", @"single"];
+}
+static NSArray* SETTING_OPTIONS_CAPT_CORE_TYPE(void) {
+    return @[@"English sentence score", @"English word score", @"English word pronounce", @"Chinese sentence raw"];
+}
+static NSArray* SETTING_OPTIONS_FULLLINK_ENGINE_TYPE(void) {
+    return @[@"FULLLINK LITE", @"FULLLINK"];
+}
+static NSArray* SETTING_OPTIONS_FULLLINK_WAKEUP_WORDS(void) {
+    return @[@"大力大力（only）", @"大力大力（大力同学）", @"大力同学（大力大力）", @"大力同学（only）"];
+}
+static NSArray* SETTING_OPTIONS_FULLLINK_WAKEUP_MODE(void) {
+    return @[@"normal", @"disable wakeup", @"night mode"];
+}
+static NSArray* SETTING_OPTIONS_TTS_TEXT_TYPE(void) {
+    return @[@"Plain", @"SSML", @"Json"];
+}
+static NSArray* SETTING_OPTIONS_TTS_WORK_MODE(void) {
+    return @[@"Online", @"Offline", @"Alternate"];
+}
+static NSArray* SETTING_OPTIONS_TTS_OFFLINE_RESOURCE_FORMAT(void) {
+    return @[@"SingleVoice", @"MultipleVoice"];
+}
+static NSArray* SETTING_OPTIONS_AUTHENTICATION_TYPE(void) {
+    return @[@"Pre Bind", @"Late Bind"];
+}
+static NSArray* SETTING_OPTIONS_AU_ABILITY(void) {
+    return @[@"ASR", @"MUSIC", @"ASR+MUSIC"];
+}
+static NSArray* SETTING_OPTIONS_MUSIC_ENGINE_NAME(void) {
+    return @[@"AFP", @"CoverSong", @"Humming"];
+}
+static NSArray* SETTING_OPTIONS_AFP_RESULT_TYPE(void) {
+    return @[@"Bytes", @"Json"];
+}
+static NSArray* SETTING_OPTIONS_ASR_STRESS_TYPE(void) {
+    return @[@"正常场景1", @"正常场景2", @"ERROR回调时析构", @"随机压测"];
+}
+
+#pragma mark - Setting Init
++ (instancetype)shareInstance {
+    static SettingsHelper* sharedInstance = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        sharedInstance = [[self alloc] init];
+
+        // Asr settings
+        sharedInstance.asrSettings = [Settings build];
+        [sharedInstance.asrSettings registerItems:@[
+            // common
+            [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+            [SettingItem buildString:SETTING_APPID val:SDEF_APPID hint:@""],
+            [SettingItem buildString:SETTING_TOKEN val:SDEF_TOKEN hint:@""],
+            [SettingItem buildString:SETTING_CLUSTER val:SDEF_ASR_DEFAULT_CLUSTER hint:SETTING_HINT_CLUSTER],
+            [SettingItem buildString:SETTING_ADDRESS val:SDEF_DEFAULT_ADDRESS hint:SETTING_HINT_ADDRESS],
+            [SettingItem buildString:SETTING_URI val:SDEF_ASR_DEFAULT_URI hint:SETTING_HINT_URI],
+            [SettingItem buildBool:SETTING_GET_VOLUME val:false hint:@""],
+            [SettingItem buildInt:SETTING_SAMPLE_RATE val:16000 hint:@""],
+            [SettingItem buildInt:SETTING_CHANNEL val:1 hint:@""],
+            [SettingItem buildOptions:SETTING_RECORD_TYPE val:[SettingOptions build:SETTING_OPTIONS_RECORD_TYPE() choose:0] hint:@""],
+            [SettingItem buildBool:SETTING_RESTART_AUDIO_SESSION_ENABLE val:false hint:@""],
+            [SettingItem buildBool:SETTING_RESUME_OTHERS_INTERRUPTED_PLAYBACK_ENABLE val:false hint:@""],
+            [SettingItem buildInt:SETTING_VAD_MAX_SPEECH_DURATION val:60000 hint:@""],
+            [SettingItem buildString:SETTING_REQUEST_HEADERS val:@"{\"custom_header_key0\": \"custom_header_value0\",\"custom_header_key1\": \"custom_header_value1\"}" hint:@""],
+
+            // asr
+            [SettingItem buildGroup:SETTING_ASR val:@"" hint:@""],
+            [SettingItem buildBool:SETTING_ASR_RECORDER_SAVE val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_ENABLE_DDC val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_ENABLE_ITN val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_ENABLE_NLU_PUNC val:true hint:@""],
+            [SettingItem buildBool:SETTING_ASR_DISABLE_END_PUNC val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_KEEP_RECORDING val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_SHOW_LANGUAGE val:false hint:@""],
+            [SettingItem buildString:SETTING_ASR_LANGUAGE val:@"en-US" hint:@""],
+            [SettingItem buildString:SETTING_ASR_HOTWORDS val:@"{\"hotwords\":[{\"word\":\"过秦论\",\"scale\":\"2.0\"}]}" hint:@""],
+            [SettingItem buildString:SETTING_ASR_CORRECTWORDS val:@"{\"古爱玲\":\"谷爱凌\",\"古埃宁\":\"谷爱凌\",\"谷爱玲\":\"谷爱凌\",\"谷埃宁\":\"谷爱凌\"}" hint:@""],
+            [SettingItem buildInt:SETTING_ASR_VAD_START_SILENCE_TIME val:0 hint:@""],
+            [SettingItem buildInt:SETTING_ASR_VAD_END_SILENCE_TIME val:0 hint:@""],
+            [SettingItem buildString:SETTING_ASR_VAD_MODE val:@"" hint:@""],
+            [SettingItem buildOptions:SETTING_ASR_RESULT_TYPE val:[SettingOptions build:SETTING_OPTIONS_ASR_RESULT_TYPE() choose:0] hint:@""],
+            [SettingItem buildInt:SETTING_ASR_MAX_RETRY_TIMES val:0 hint:@""],
+            [SettingItem buildString:SETTING_ASR_REQ_PARAMS val:@"" hint:@""],
+        ]];
+
+        // BigAsr settings
+        sharedInstance.bigAsrSettings = [Settings build];
+        [sharedInstance.bigAsrSettings registerItems:@[
+            // common
+            [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+            [SettingItem buildString:SETTING_APPID val:SDEF_BIGASR_DEFAULT_APPID hint:@""],
+            [SettingItem buildString:SETTING_TOKEN val:SDEF_BIGASR_DEFAULT_TOKEN hint:@""],
+            [SettingItem buildString:SETTING_RESOURCE_ID val:SDEF_BIGASR_DEFAULT_RESOURCE_ID hint:@""],
+            [SettingItem buildString:SETTING_ADDRESS val:SDEF_DEFAULT_ADDRESS hint:SETTING_HINT_ADDRESS],
+            [SettingItem buildString:SETTING_URI val:SDEF_BIGASR_DEFAULT_URI hint:SETTING_HINT_URI],
+            [SettingItem buildBool:SETTING_GET_VOLUME val:false hint:@""],
+            [SettingItem buildInt:SETTING_SAMPLE_RATE val:16000 hint:@""],
+            [SettingItem buildInt:SETTING_CHANNEL val:1 hint:@""],
+            [SettingItem buildOptions:SETTING_RECORD_TYPE val:[SettingOptions build:SETTING_OPTIONS_RECORD_TYPE() choose:0] hint:@""],
+            [SettingItem buildBool:SETTING_RESTART_AUDIO_SESSION_ENABLE val:false hint:@""],
+            [SettingItem buildBool:SETTING_RESUME_OTHERS_INTERRUPTED_PLAYBACK_ENABLE val:false hint:@""],
+            [SettingItem buildInt:SETTING_VAD_MAX_SPEECH_DURATION val:60000 hint:@""],
+
+            // asr
+            [SettingItem buildGroup:SETTING_ASR val:@"" hint:@""],
+            [SettingItem buildBool:SETTING_ASR_RECORDER_SAVE val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_ENABLE_DDC val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_ENABLE_ITN val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_ENABLE_NLU_PUNC val:true hint:@""],
+            [SettingItem buildString:SETTING_ASR_REQ_PARAMS val:@"" hint:@""],
+        ]];
+
+        // Asr offline settings
+        sharedInstance.asrOfflineSettings = [Settings build];
+        [sharedInstance.asrOfflineSettings registerItems:@[
+            // common
+            [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+            [SettingItem buildString:SETTING_APPID val:SDEF_APPID hint:@""],
+            [SettingItem buildOptions:SETTING_RECORD_TYPE val:[SettingOptions build:SETTING_OPTIONS_RECORD_TYPE() choose:0] hint:@""],
+            [SettingItem buildInt:SETTING_VAD_MAX_SPEECH_DURATION val:15000 hint:@""],
+            [SettingItem buildOptions:SETTING_AUTHENTICATION_TYPE val:[SettingOptions build:SETTING_OPTIONS_AUTHENTICATION_TYPE() choose:1] hint:@""],
+            [SettingItem buildString:SETTING_LICENSE_NAME val:SDEF_LICENSE_NAME hint:SETTING_HINT_LICENSE_NAME],
+            [SettingItem buildString:SETTING_LICENSE_BUSI_ID val:SDEF_LICENSE_BUSI_ID hint:SETTING_HINT_LICENSE_BUSI_ID],
+            [SettingItem buildString:SETTING_BUSINESS_KEY val:SDEF_BUSINESS_KEY hint:SETTING_HINT_BUSINESS_KEY],
+            [SettingItem buildString:SETTING_AUTHENTICATE_SECRET val:SDEF_SECRET hint:SETTING_HINT_AUTHENTICATE_SECRET],
+
+            // asr
+            [SettingItem buildGroup:SETTING_ASR val:@"" hint:@""],
+            [SettingItem buildBool:SETTING_ASR_ENABLE_RESOURCE_DOWNLOAD val:false hint:@""],
+            [SettingItem buildString:SETTING_ASR_MODEL_NAME val:SDEF_ASR_DEFAULT_MODEL_NAME hint:@""],
+            [SettingItem buildBool:SETTING_ASR_RECORDER_SAVE val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_ENABLE_ITN val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_SHOW_LANGUAGE val:false hint:@""],
+            [SettingItem buildOptions:SETTING_ASR_RESULT_TYPE val:[SettingOptions build:SETTING_OPTIONS_ASR_RESULT_TYPE() choose:0] hint:@""],
+        ]];
+
+        // Capt settings
+        sharedInstance.captSettings = [Settings build];
+        [sharedInstance.captSettings registerItems:@[
+            // common
+            [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+            [SettingItem buildString:SETTING_CLUSTER val:SDEF_CAPT_DEFAULT_CLUSTER hint:SETTING_HINT_CLUSTER],
+            [SettingItem buildString:SETTING_ADDRESS val:SDEF_DEFAULT_ADDRESS hint:SETTING_HINT_ADDRESS],
+            [SettingItem buildString:SETTING_URI val:@"" hint:SETTING_HINT_URI],
+            [SettingItem buildString:SETTING_APPID val:SDEF_APPID hint:@""],
+            [SettingItem buildString:SETTING_TOKEN val:SDEF_APPID hint:@""],
+            [SettingItem buildBool:SETTING_GET_VOLUME val:false hint:@""],
+            [SettingItem buildOptions:SETTING_RECORD_TYPE val:[SettingOptions build:SETTING_OPTIONS_RECORD_TYPE() choose:0] hint:@""],
+            [SettingItem buildBool:SETTING_ENABLE_AEC val:false hint:@""],
+            [SettingItem buildBool:SETTING_RESTART_AUDIO_SESSION_ENABLE val:false hint:@""],
+            [SettingItem buildBool:SETTING_RESUME_OTHERS_INTERRUPTED_PLAYBACK_ENABLE val:false hint:@""],
+            [SettingItem buildInt:SETTING_VAD_MAX_SPEECH_DURATION val:15000 hint:@""],
+
+            // capt
+            [SettingItem buildGroup:SETTING_CAPT val:@"" hint:@""],
+            [SettingItem buildBool:SETTING_CAPT_RECORDER_SAVE val:false hint:@""],
+            [SettingItem buildBool:SETTING_CAPT_STREAMING_MODE val:false hint:@""],
+            [SettingItem buildOptions:SETTING_CAPT_CORE_TYPE val:[SettingOptions build:SETTING_OPTIONS_CAPT_CORE_TYPE() choose:0] hint:@""],
+            [SettingItem buildInt:SETTING_CAPT_DIFFICULTY_LEVEL val:2 hint:SETTING_HINT_DIFFICULTY_LEVEL],
+        ]];
+
+        // Fulllink settings
+        sharedInstance.fulllinkSettings = [Settings build];
+        [sharedInstance.fulllinkSettings registerItems:@[
+            // common
+            [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+            [SettingItem buildString:SETTING_CLUSTER val:@"" hint:SETTING_HINT_CLUSTER],
+            [SettingItem buildString:SETTING_ADDRESS val:SDEF_DEFAULT_ADDRESS hint:SETTING_HINT_ADDRESS],
+            [SettingItem buildBool:SETTING_GET_VOLUME val:false hint:@""],
+            [SettingItem buildInt:SETTING_SAMPLE_RATE val:16000 hint:@""],
+            [SettingItem buildOptions:SETTING_RECORD_TYPE val:[SettingOptions build:SETTING_OPTIONS_RECORD_TYPE() choose:0] hint:@""],
+            [SettingItem buildBool:SETTING_ENABLE_AEC val:false hint:@""],
+            [SettingItem buildBool:SETTING_RESTART_AUDIO_SESSION_ENABLE val:false hint:@""],
+            [SettingItem buildBool:SETTING_RESUME_OTHERS_INTERRUPTED_PLAYBACK_ENABLE val:false hint:@""],
+
+            // fulllink
+            [SettingItem buildGroup:SETTING_FULLLINK val:@"" hint:@""],
+            [SettingItem buildOptions:SETTING_FULLLINK_ENGINE_TYPE val:[SettingOptions build:SETTING_OPTIONS_FULLLINK_ENGINE_TYPE() choose:0] hint:@""],
+            [SettingItem buildOptions:SETTING_FULLLINK_WAKEUP_WORDS val:[SettingOptions build:SETTING_OPTIONS_FULLLINK_WAKEUP_WORDS() choose:0] hint:@""],
+            [SettingItem buildBool:SETTING_FULLLINK_ENABLE_RECORDER_DUMP val:false hint:@""],
+            [SettingItem buildBool:SETTING_FULLLINK_ENABLE_KWS_DUMP val:false hint:@""],
+            [SettingItem buildOptions:SETTING_FULLLINK_WAKEUP_MODE val:[SettingOptions build:SETTING_OPTIONS_FULLLINK_WAKEUP_MODE() choose:0] hint:@""],
+            [SettingItem buildBool:SETTING_FULLLINK_ONLY_ASR val:false hint:@""],
+            [SettingItem buildBool:SETTING_FULLLINK_DISABLE_TTS val:false hint:@""],
+            [SettingItem buildBool:SETTING_FULLLINK_DISABLE_SIGNAL val:false hint:@""],
+            [SettingItem buildInt:SETTING_FULLLINK_DISABLE_SIGTHREAD_PRI val:-10 hint:@""],
+            [SettingItem buildString:SETTING_FULLLINK_DISABLE_FILE_OR_DIRECTORY_NAME val:@"" hint:@""],
+        ]];
+
+        // Tts settings
+        sharedInstance.ttsSettings = [Settings build];
+        [sharedInstance.ttsSettings registerItems:@[
+            // common
+            [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+            [SettingItem buildString:SETTING_APPID val:SDEF_APPID hint:@""],
+            [SettingItem buildString:SETTING_TOKEN val:SDEF_TOKEN hint:@""],
+            [SettingItem buildString:SETTING_CLUSTER val:SDEF_TTS_DEFAULT_CLUSTER hint:SETTING_HINT_CLUSTER],
+            [SettingItem buildString:SETTING_ADDRESS val:SDEF_DEFAULT_ADDRESS hint:SETTING_HINT_ADDRESS],
+            [SettingItem buildString:SETTING_URI val:SDEF_TTS_DEFAULT_URI hint:SETTING_HINT_URI],
+            [SettingItem buildString:SETTING_ONLINE_VOICE val:SDEF_TTS_DEFAULT_ONLINE_VOICE hint:SETTING_HINT_ONLINE_VOICE],
+            [SettingItem buildString:SETTING_ONLINE_VOICE_TYPE val:SDEF_TTS_DEFAULT_ONLINE_VOICE_TYPE hint:SETTING_HINT_ONLINE_VOICE_TYPE],
+            [SettingItem buildString:SETTING_OFFLINE_VOICE val:SDEF_TTS_DEFAULT_OFFLINE_VOICE hint:SETTING_HINT_OFFLINE_VOICE],
+            [SettingItem buildString:SETTING_OFFLINE_VOICE_TYPE val:SDEF_TTS_DEFAULT_OFFLINE_VOICE_TYPE hint:SETTING_HINT_OFFLINE_VOICE_TYPE],
+            [SettingItem buildOptions:SETTING_AUTHENTICATION_TYPE val:[SettingOptions build:SETTING_OPTIONS_AUTHENTICATION_TYPE() choose:0] hint:@""],
+            [SettingItem buildString:SETTING_LICENSE_NAME val:SDEF_LICENSE_NAME hint:SETTING_HINT_LICENSE_NAME],
+            [SettingItem buildString:SETTING_LICENSE_BUSI_ID val:SDEF_LICENSE_BUSI_ID hint:SETTING_HINT_LICENSE_BUSI_ID],
+            [SettingItem buildString:SETTING_BUSINESS_KEY val:SDEF_BUSINESS_KEY hint:SETTING_HINT_BUSINESS_KEY],
+            [SettingItem buildString:SETTING_AUTHENTICATE_SECRET val:SDEF_SECRET hint:SETTING_HINT_AUTHENTICATE_SECRET],
+            [SettingItem buildBool:SETTING_DISABLE_WS_RECONNECT val:false hint:@""],
+            [SettingItem buildInt:SETTING_AUDIO_FADEOUT_DURATION val:0 hint:@""],
+
+            // tts
+            [SettingItem buildGroup:SETTING_TTS val:@"" hint:@""],
+            [SettingItem buildOptions:SETTING_TTS_WORK_MODE val:[SettingOptions build:SETTING_OPTIONS_TTS_WORK_MODE() choose:0] hint:@""],
+            [SettingItem buildOptions:SETTING_TTS_TEXT_TYPE val:[SettingOptions build:SETTING_OPTIONS_TTS_TEXT_TYPE() choose:0] hint:@""],
+            [SettingItem buildBool:SETTING_PREVENT_PLAYER_CREATION val:false hint:@""],
+            [SettingItem buildBool:SETTING_TTS_ENABLE_RESUME_FROM_BREAKPOINT val:true hint:@""],
+            [SettingItem buildBool:SETTING_TTS_ENABLE_PLAYER val:true hint:@""],
+            [SettingItem buildBool:SETTING_TTS_ENABLE_DUMP val:false hint:@""],
+            [SettingItem buildBool:SETTING_TTS_ENABLE_DATA_CALLBACK val:false hint:@""],
+            [SettingItem buildBool:SETTING_TTS_ENABLE_WORD_LEVEL_PROGRESS_UPDATE val:true hint:@""],
+            [SettingItem buildInt:SETTING_TTS_SILENCE_DURATION val:0 hint:@""],
+            [SettingItem buildDouble:SETTING_TTS_SPEAK_SPEED val:1.0 hint:@""],
+            [SettingItem buildDouble:SETTING_TTS_AUDIO_VOLUME val:1.0 hint:@""],
+            [SettingItem buildDouble:SETTING_TTS_AUDIO_PITCH val:1.0 hint:@""],
+            [SettingItem buildInt:SETTING_TTS_SAMPLE_RATE val:16000 hint:SETTING_HINT_TTS_SAMPLE_RATE],
+
+            [SettingItem buildBool:SETTING_TTS_ENABLE_CACHE val:false hint:@""],
+            [SettingItem buildBool:SETTING_TTS_WITH_INTENT val:false hint:@""],
+            [SettingItem buildString:SETTING_TTS_ONLINE_LANGUAGE val:SDEF_TTS_DEFAULT_ONLINE_LANGUAGE hint:SETTING_HINT_TTS_ONLINE_LANGUAGE],
+            [SettingItem buildString:SETTING_TTS_EMOTION val:@"" hint:SETTING_HINT_TTS_EMOTION],
+            [SettingItem buildBool:SETTING_TTS_USE_VOICECLONE_VOICE val:false hint:@""],
+            [SettingItem buildString:SETTING_TTS_BACKEND_CLUSTER val:@"demo_test" hint:SETTING_HINT_BACKEND_CLUSTER],
+            [SettingItem buildString:SETTING_TTS_REQUEST_ID val:@"" hint:@""],
+            [SettingItem buildString:SETTING_TTS_REQUEST_PARAMS val:@"" hint:@""],
+
+            [SettingItem buildOptions:SETTING_TTS_OFFLINE_RESOURCE_FORMAT val:[SettingOptions build:SETTING_OPTIONS_TTS_OFFLINE_RESOURCE_FORMAT() choose:0] hint:@""],
+            [SettingItem buildString:SETTING_TTS_OFFLINE_LANGUAGE val:SDEF_TTS_DEFAULT_OFFLINE_LANGUAGE hint:SETTING_HINT_TTS_OFFLINE_LANGUAGE],
+            [SettingItem buildString:SETTING_TTS_MODEL_NAME val:@"aispeech_tts" hint:SETTING_HINT_TTS_MODEL_NAME],
+            [SettingItem buildBool:SETTING_TTS_LIMIT_CPU_USAGE val:false hint:@""],
+        ]];
+        // VoiceClone settings
+        sharedInstance.voiceCloneSettings = [Settings build];
+        [sharedInstance.voiceCloneSettings registerItems:@[
+            // common
+            [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+            [SettingItem buildInt:SETTING_SAMPLE_RATE val:44100 hint:@""],
+            [SettingItem buildString:SETTING_APPID val:SDEF_APPID hint:@""],
+            [SettingItem buildString:SETTING_TOKEN val:SDEF_APPID hint:@""],
+            [SettingItem buildOptions:SETTING_RECORD_TYPE val:[SettingOptions build:SETTING_OPTIONS_RECORD_TYPE() choose:0] hint:@""],
+
+            // voiceclone
+            [SettingItem buildGroup:SETTING_VOICECLONE val:@"" hint:@""],
+            [SettingItem buildString:SETTING_VOICECLONE_ADDRESS val:SDEF_DEFAULT_HTTP_ADDRESS hint:@""],
+            [SettingItem buildString:SETTING_VOICECLONE_STREAM_ADDRESS val:SDEF_DEFAULT_ADDRESS hint:@""],
+            [SettingItem buildString:SETTING_VOICECLONE_UID val:SDEF_UID hint:SETTING_HINT_VOICECLONE_UID],
+            [SettingItem buildString:SETTING_VOICECLONE_QUERY_UIDS val:SDEF_VOICECLONE_DEFAULT_UIDS hint:SETTING_HINT_VOICECLONE_QUERY_UIDS],
+            [SettingItem buildString:SETTING_VOICECLONE_VOICE_TYPE val:@"" hint:SETTING_HINT_VOICECLONE_VOICE_TYPE],
+            [SettingItem buildBool:SETTING_VOICECLONE_GENDER val:false hint:@""],
+            [SettingItem buildInt:SETTING_VOICECLONE_TASKID val:SDEF_VOICECLONE_DEFAULT_TASK_ID hint:@""],
+        ]];
+
+        // VoiceConv settings
+        sharedInstance.voiceConvSettings = [Settings build];
+        [sharedInstance.voiceConvSettings registerItems:@[
+            // common
+            [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+            [SettingItem buildString:SETTING_VOICE val:SDEF_VOICECONV_DEFAULT_VOICE hint:SETTING_HINT_VOICE],
+            [SettingItem buildString:SETTING_VOICE_TYPE val:SDEF_VOICECONV_DEFAULT_VOICE_TYPE hint:SETTING_HINT_VOICE_TYPE],
+            [SettingItem buildBool:SETTING_GET_VOLUME val:false hint:@""],
+            [SettingItem buildOptions:SETTING_RECORD_TYPE val:[SettingOptions build:SETTING_OPTIONS_RECORD_TYPE() choose:0] hint:@""],
+
+            // voiceconv
+            [SettingItem buildGroup:SETTING_VOICECONV val:@"" hint:@""],
+            [SettingItem buildInt:SETTING_VOICECONV_RESULT_SAMPLE_RATE val:24000 hint:@""],
+            [SettingItem buildBool:SETTING_VOICECONV_ENABLE_RECORD_DUMP val:true hint:@""],
+            [SettingItem buildBool:SETTING_VOICECONV_ENABLE_RESULT_DUMP val:true hint:@""],
+            [SettingItem buildInt:SETTING_VOICECONV_REQUEST_INTERVAL val:200 hint:@""],
+        ]];
+
+        // Dialog settings
+        sharedInstance.dialogSettings = [Settings build];
+        [sharedInstance.dialogSettings registerItems:@[
+            // common
+            [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+            [SettingItem buildString:SETTING_APPID val:SDEF_APPID hint:@""],
+            [SettingItem buildString:SETTING_APPKEY val:SDEF_APPKEY hint:@""],
+            [SettingItem buildString:SETTING_TOKEN val:SDEF_TOKEN hint:@""],
+            [SettingItem buildString:SETTING_RESOURCE_ID val:SDEF_DIALOG_DEFAULT_RESOURCE_ID hint:@""],
+            [SettingItem buildString:SETTING_ADDRESS val:SDEF_DEFAULT_ADDRESS hint:SETTING_HINT_ADDRESS],
+            [SettingItem buildString:SETTING_URI val:SDEF_DIALOG_DEFAULT_URI hint:SETTING_HINT_URI],
+            [SettingItem buildString:SETTING_REQUEST_HEADERS val:@"" hint:@""],
+
+            // dialog
+            [SettingItem buildGroup:SETTING_DIALOG val:@"" hint:@""],
+            [SettingItem buildBool:SETTING_DIALOG_ENABLE_RECORDER_DUMP val:false hint:@""],
+            [SettingItem buildBool:SETTING_DIALOG_ENABLE_PLAYER_DUMP val:false hint:@""],
+            [SettingItem buildString:SETTING_DIALOG_BOT_NAME val:@"豆包" hint:@""],
+        ]];
+
+        // Dialog settings
+        sharedInstance.dialogDelegateSettings = [Settings build];
+        [sharedInstance.dialogDelegateSettings registerItems:@[
+            // common
+            [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+            [SettingItem buildString:SETTING_APPID val:SDEF_APPID hint:@""],
+            [SettingItem buildString:SETTING_APPKEY val:SDEF_APPKEY hint:@""],
+            [SettingItem buildString:SETTING_TOKEN val:SDEF_TOKEN hint:@""],
+            [SettingItem buildString:SETTING_RESOURCE_ID val:SDEF_DIALOG_DEFAULT_RESOURCE_ID hint:@""],
+            [SettingItem buildString:SETTING_ADDRESS val:SDEF_DEFAULT_ADDRESS hint:SETTING_HINT_ADDRESS],
+            [SettingItem buildString:SETTING_URI val:SDEF_DIALOG_DEFAULT_URI hint:SETTING_HINT_URI],
+            [SettingItem buildString:SETTING_REQUEST_HEADERS val:@"" hint:@""],
+
+            // dialog
+            [SettingItem buildGroup:SETTING_DIALOG val:@"" hint:@""],
+            [SettingItem buildBool:SETTING_DIALOG_ENABLE_RECORDER_DUMP val:false hint:@""],
+            [SettingItem buildBool:SETTING_DIALOG_ENABLE_PLAYER_DUMP val:false hint:@""],
+            [SettingItem buildString:SETTING_DIALOG_BOT_NAME val:@"豆包" hint:@""],
+        ]];
+
+        // BiTTS settings
+        sharedInstance.bittsSettings = [Settings build];
+        [sharedInstance.bittsSettings registerItems:@[
+            // common
+            [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+            [SettingItem buildString:SETTING_APPID val:SDEF_BITTS_DEFAULT_APPID hint:@""],
+            [SettingItem buildString:SETTING_TOKEN val:SDEF_BITTS_DEFAULT_TOKEN hint:@""],
+            [SettingItem buildString:SETTING_RESOURCE_ID val:SDEF_BITTS_DEFAULT_RESOURCE_ID hint:@""],
+            [SettingItem buildString:SETTING_ADDRESS val:SDEF_DEFAULT_ADDRESS hint:SETTING_HINT_ADDRESS],
+            [SettingItem buildString:SETTING_URI val:SDEF_BITTS_DEFAULT_URI hint:SETTING_HINT_URI],
+            [SettingItem buildString:SETTING_REQUEST_HEADERS val:@"{}" hint:@""],
+
+            // bitts
+            [SettingItem buildGroup:SETTING_BITTS val:@"" hint:@""],
+            [SettingItem buildBool:SETTING_TTS_ENABLE_PLAYER val:true hint:@""],
+            [SettingItem buildBool:SETTING_TTS_ENABLE_DUMP val:false hint:@""],
+            [SettingItem buildBool:SETTING_ENABLE_PLAYER_AUDIO_CALL_BACK val:true hint:@""],
+        ]];
+
+        // UniTTS settings
+        sharedInstance.uniTtsSettings = [Settings build];
+        [sharedInstance.uniTtsSettings registerItems:@[
+            // common
+            [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+            [SettingItem buildString:SETTING_APPID val:SDEF_UNITTS_DEFAULT_APPID hint:@""],
+            [SettingItem buildString:SETTING_TOKEN val:SDEF_UNITTS_DEFAULT_TOKEN hint:@""],
+            [SettingItem buildString:SETTING_RESOURCE_ID val:SDEF_UNITTS_DEFAULT_RESOURCE_ID hint:@""],
+            [SettingItem buildString:SETTING_ADDRESS val:SDEF_DEFAULT_ADDRESS hint:SETTING_HINT_ADDRESS],
+            [SettingItem buildString:SETTING_URI val:SDEF_UNITTS_DEFAULT_URI hint:SETTING_HINT_URI],
+            [SettingItem buildString:SETTING_REQUEST_HEADERS val:@"{}" hint:@""],
+
+            // unitts
+            [SettingItem buildGroup:SETTING_UNITTS val:@"" hint:@""],
+            [SettingItem buildBool:SETTING_TTS_ENABLE_PLAYER val:true hint:@""],
+            [SettingItem buildBool:SETTING_TTS_ENABLE_DUMP val:false hint:@""],
+            [SettingItem buildBool:SETTING_ENABLE_PLAYER_AUDIO_CALL_BACK val:true hint:@""],
+        ]];
+
+        // Vad settings
+        sharedInstance.vadSettings = [Settings build];
+        [sharedInstance.vadSettings registerItems:@[
+            // common
+            [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+            [SettingItem buildBool:SETTING_GET_VOLUME val:false hint:@""],
+            [SettingItem buildOptions:SETTING_RECORD_TYPE val:[SettingOptions build:SETTING_OPTIONS_RECORD_TYPE() choose:0] hint:@""],
+            [SettingItem buildBool:SETTING_RESTART_AUDIO_SESSION_ENABLE val:false hint:@""],
+            [SettingItem buildBool:SETTING_RESUME_OTHERS_INTERRUPTED_PLAYBACK_ENABLE val:false hint:@""],
+
+            // vad
+            [SettingItem buildGroup:SETTING_VAD val:@"" hint:@""],
+            [SettingItem buildBool:SETTING_VAD_RECORDER_SAVE val:false hint:@""],
+            [SettingItem buildInt:SETTING_VAD_HEAD_SILENCE_THRESHOLD val:4000 hint:@""],
+            [SettingItem buildInt:SETTING_VAD_TAIL_SILENCE_THRESHOLD val:2000 hint:@""],
+        ]];
+
+        // Au settings
+        sharedInstance.auSettings = [Settings build];
+        [sharedInstance.auSettings registerItems:@[
+            // common
+            [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+            [SettingItem buildString:SETTING_APPID val:SDEF_AU_DEFAULT_APP_ID hint:@""],
+            [SettingItem buildString:SETTING_TOKEN val:SDEF_TOKEN hint:@""],
+            [SettingItem buildString:SETTING_CLUSTER val:SDEF_AU_DEFAULT_CLUSTER hint:SETTING_HINT_CLUSTER],
+            [SettingItem buildString:SETTING_ADDRESS val:SDEF_AU_DEFAULT_ADDRESS hint:SETTING_HINT_ADDRESS],
+            [SettingItem buildString:SETTING_URI val:SDEF_AU_DEFAULT_URI hint:SETTING_HINT_URI],
+            [SettingItem buildOptions:SETTING_RECORD_TYPE val:[SettingOptions build:SETTING_OPTIONS_RECORD_TYPE() choose:0] hint:@""],
+
+            // au
+            [SettingItem buildGroup:SETTING_AU val:@"" hint:@""],
+            [SettingItem buildOptions:SETTING_AU_ABILITY val:[SettingOptions build:SETTING_OPTIONS_AU_ABILITY() choose:2] hint:@""],
+            [SettingItem buildBool:SETTING_AU_RECORDER_SAVE val:false hint:@""],
+            [SettingItem buildInt:SETTING_AU_PROCESS_TIMEOUT val:3000 hint:@""],
+            [SettingItem buildInt:SETTING_AU_AUDIO_PACKET_DURATION val:80 hint:@""],
+            [SettingItem buildInt:SETTING_AU_EMPTY_PACKET_INTERVAL val:500 hint:@""],
+            [SettingItem buildInt:SETTING_VAD_MAX_SPEECH_DURATION val:60000 hint:@""],
+            [SettingItem buildInt:SETTING_VAD_MAX_MUSIC_DURATION val:12000 hint:@""],
+
+            // asr
+            [SettingItem buildGroup:SETTING_ASR val:@"" hint:@""],
+            [SettingItem buildBool:SETTING_ASR_ENABLE_DDC val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_ENABLE_ITN val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_ENABLE_NLU_PUNC val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_SHOW_LANGUAGE val:false hint:@""],
+            [SettingItem buildString:SETTING_ASR_LANGUAGE val:@"en-US" hint:@""],
+            [SettingItem buildString:SETTING_ASR_HOTWORDS val:@"{\"hotwords\":[{\"word\":\"过秦论\",\"scale\":\"2.0\"}]}" hint:@""],
+            [SettingItem buildInt:SETTING_ASR_VAD_START_SILENCE_TIME val:0 hint:@""],
+            [SettingItem buildInt:SETTING_ASR_VAD_END_SILENCE_TIME val:0 hint:@""],
+            [SettingItem buildString:SETTING_ASR_VAD_MODE val:@"" hint:@""],
+            [SettingItem buildOptions:SETTING_ASR_RESULT_TYPE val:[SettingOptions build:SETTING_OPTIONS_ASR_RESULT_TYPE() choose:0] hint:@""],
+        ]];
+
+        // Afp
+        sharedInstance.afpSettings = [Settings build];
+        [sharedInstance.afpSettings registerItems:@[
+            // afp
+            [SettingItem buildGroup:SETTING_AFP val:@"" hint:@""],
+            [SettingItem buildOptions:SETTING_MUSIC_ENGINE_NAME val:[SettingOptions build:SETTING_OPTIONS_MUSIC_ENGINE_NAME() choose:0] hint:@""],
+            [SettingItem buildOptions:SETTING_AFP_RESULT_TYPE val:[SettingOptions build:SETTING_OPTIONS_AFP_RESULT_TYPE() choose:0] hint:@""],
+        ]];
+
+        // Kws settings
+        sharedInstance.kwsSettings = [Settings build];
+        [sharedInstance.kwsSettings registerItems:@[
+                // common
+                [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+                [SettingItem buildOptions:SETTING_RECORD_TYPE val:[SettingOptions build:SETTING_OPTIONS_RECORD_TYPE() choose:0] hint:@""],
+                // kws
+                [SettingItem buildGroup:SETTING_KWS val:@"" hint:@""],
+                [SettingItem buildString:SETTING_KWS_MODEL_NAME val:@"aispeech_kws_douyin" hint:@""],
+                [SettingItem buildString:SETTING_KWS_CUSTOM_WORDS val:@"{\"word_list\":[{\"name\":\"大力大力\",\"keyword_type\":0,\"min_dur\":0.15,\"max_dur\":3,\"threshold\":-3.6}]}" hint:@""],
+        ]];
+
+        // Test Afp
+        sharedInstance.testAfpSettings = [Settings build];
+        [sharedInstance.testAfpSettings registerItems:@[
+            // afp
+            [SettingItem buildGroup:SETTING_AFP val:@"" hint:@""],
+            [SettingItem buildOptions:SETTING_AFP_RESULT_TYPE val:[SettingOptions build:SETTING_OPTIONS_AFP_RESULT_TYPE() choose:0] hint:@""],
+            [SettingItem buildInt:SETTING_AFP_INSTANCE_NUMBER val:10 hint:@""],
+        ]];
+
+        // Test: asr offline rtf settins
+        sharedInstance.testAsrOfflineRtfSettings = [Settings build];
+        [sharedInstance.testAsrOfflineRtfSettings registerItems:@[
+                // common
+                [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+                [SettingItem buildInt:SETTING_STREAM_PACKAGE_DURATION val:20000 hint:@""],
+
+                // asr
+                [SettingItem buildGroup:SETTING_ASR val:@"" hint:@""],
+                [SettingItem buildBool:SETTING_ASR_RECORDER_SAVE val:false hint:@""],
+                [SettingItem buildBool:SETTING_ASR_ENABLE_ITN val:false hint:@""],
+                [SettingItem buildBool:SETTING_ASR_SHOW_LANGUAGE val:false hint:@""],
+        ]];
+
+        // Test: asr stress settings
+        sharedInstance.testAsrStressSettings = [Settings build];
+        [sharedInstance.testAsrStressSettings registerItems:@[
+            // stress
+            [SettingItem buildGroup:SETTING_ASR_STRESS val:@"" hint:@""],
+            [SettingItem buildOptions:SETTING_ASR_STRESS_SCENEID val:[SettingOptions build:SETTING_OPTIONS_ASR_STRESS_TYPE() choose:0] hint:@""],
+
+            // common
+            [SettingItem buildGroup:SETTING_COMMON val:@"" hint:@""],
+            [SettingItem buildString:SETTING_APPID val:SDEF_APPID hint:@""],
+            [SettingItem buildString:SETTING_TOKEN val:SDEF_TOKEN hint:@""],
+            [SettingItem buildString:SETTING_CLUSTER val:SDEF_ASR_DEFAULT_CLUSTER hint:SETTING_HINT_CLUSTER],
+            [SettingItem buildString:SETTING_ADDRESS val:SDEF_DEFAULT_ADDRESS hint:SETTING_HINT_ADDRESS],
+            [SettingItem buildString:SETTING_URI val:SDEF_ASR_DEFAULT_URI hint:SETTING_HINT_URI],
+            [SettingItem buildBool:SETTING_GET_VOLUME val:false hint:@""],
+            [SettingItem buildOptions:SETTING_RECORD_TYPE val:[SettingOptions build:SETTING_OPTIONS_RECORD_TYPE() choose:0] hint:@""],
+            [SettingItem buildBool:SETTING_RESTART_AUDIO_SESSION_ENABLE val:false hint:@""],
+            [SettingItem buildBool:SETTING_RESUME_OTHERS_INTERRUPTED_PLAYBACK_ENABLE val:false hint:@""],
+            [SettingItem buildInt:SETTING_VAD_MAX_SPEECH_DURATION val:15000 hint:@""],
+            [SettingItem buildInt:SETTING_STREAM_PACKAGE_DURATION val:20000 hint:@""],
+
+            // asr
+            [SettingItem buildGroup:SETTING_ASR val:@"" hint:@""],
+            [SettingItem buildBool:SETTING_ASR_RECORDER_SAVE val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_ENABLE_DDC val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_ENABLE_ITN val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_ENABLE_NLU_PUNC val:true hint:@""],
+            [SettingItem buildBool:SETTING_ASR_KEEP_RECORDING val:false hint:@""],
+            [SettingItem buildBool:SETTING_ASR_SHOW_LANGUAGE val:false hint:@""],
+            [SettingItem buildString:SETTING_ASR_LANGUAGE val:@"en-US" hint:@""],
+            [SettingItem buildString:SETTING_ASR_HOTWORDS val:@"{\"hotwords\":[{\"word\":\"过秦论\",\"scale\":\"2.0\"}]}" hint:@""],
+            [SettingItem buildInt:SETTING_ASR_VAD_START_SILENCE_TIME val:0 hint:@""],
+            [SettingItem buildInt:SETTING_ASR_VAD_END_SILENCE_TIME val:0 hint:@""],
+            [SettingItem buildString:SETTING_ASR_VAD_MODE val:@"" hint:@""],
+            [SettingItem buildOptions:SETTING_ASR_RESULT_TYPE val:[SettingOptions build:SETTING_OPTIONS_ASR_RESULT_TYPE() choose:0] hint:@""],
+        ]];
+
+    });
+    return sharedInstance;
+}
+
+- (Settings*)getSettings:(NSString*)viewId {
+    if ([viewId isEqualToString: VIEW_ASR]) {
+        return self.asrSettings;
+    } else if ([viewId isEqualToString: VIEW_BIGASR]) {
+        return self.bigAsrSettings;
+    } else if ([viewId isEqualToString: VIEW_ASR_OFFLINE]) {
+        return self.asrOfflineSettings;
+    } else if ([viewId isEqualToString: VIEW_CAPT]) {
+        return self.captSettings;
+    } else if ([viewId isEqualToString: VIEW_FULLLINK]) {
+        return self.fulllinkSettings;
+    } else if ([viewId isEqualToString: VIEW_TTS]) {
+        return self.ttsSettings;
+    } else if ([viewId isEqualToString: VIEW_VOICECLONE]) {
+        return self.voiceCloneSettings;
+    } else if ([viewId isEqualToString: VIEW_VOICECONV]) {
+        return self.voiceConvSettings;
+    } else if ([viewId isEqualToString: VIEW_DIALOG]) {
+        return self.dialogSettings;
+    } else if ([viewId isEqualToString: VIEW_DIALOG_DELEGATE]) {
+        return self.dialogDelegateSettings;
+    } else if ([viewId isEqualToString: VIEW_BITTS]) {
+        return self.bittsSettings;
+    } else if ([viewId isEqualToString: VIEW_UNITTS]) {
+        return self.uniTtsSettings;
+    } else if ([viewId isEqualToString: VIEW_VAD]) {
+        return self.vadSettings;
+    } else if ([viewId isEqualToString: VIEW_AU]) {
+        return self.auSettings;
+    } else if ([viewId isEqualToString: VIEW_AFP]) {
+        return self.afpSettings;
+    } else if ([viewId isEqualToString: VIEW_KWS]) {
+        return self.kwsSettings;
+    } else if ([viewId isEqualToString: VIEW_TEST_AFP]) {
+        return self.testAfpSettings;
+    } else if ([viewId isEqualToString: VIEW_TEST_ASR_OFFLINE_RTF]) {
+        return self.testAsrOfflineRtfSettings;
+    } else if ([viewId isEqualToString: VIEW_TEST_ASR_STRESS]) {
+        return self.testAsrStressSettings;
+    } else {
+        NSLog( @"View id %@ is not found yet!", viewId);
+    }
+    return [Settings build];
+}
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/settings/SettingsViewController.h

@@ -0,0 +1,19 @@
+//
+//  SettingsViewController.h
+//  SpeechDemo
+//
+//  Created by fangweiwei on 2020/2/28.
+//  Copyright © 2020 fangweiwei. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface SettingsViewController : UITableViewController
+
+@property (strong, nonatomic) NSString *viewId;
+
+@end
+
+NS_ASSUME_NONNULL_END

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/settings/SettingsViewController.m

@@ -0,0 +1,42 @@
+//
+//  SettingsViewController.m
+//  SpeechDemo
+//
+//  Created by fangweiwei on 2020/2/28.
+//  Copyright © 2020 fangweiwei. All rights reserved.
+//
+
+#import "SettingsViewController.h"
+#import "SettingsHelper.h"
+#import "SettingViewDelegate.h"
+
+@interface SettingsViewController () <UITextFieldDelegate>
+
+@property (weak, nonatomic) IBOutlet UITableView *settingTableView;
+@property (strong, nonatomic) SettingViewDelegate *settingViewDelegate;
+
+@end
+
+@implementation SettingsViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    SettingsHelper* settingsInstance = [SettingsHelper shareInstance];
+    self.settingViewDelegate = [SettingViewDelegate build:[settingsInstance getSettings:self.viewId]];
+    self.settingTableView.delegate = self.settingViewDelegate;
+    self.settingTableView.dataSource = self.settingViewDelegate;
+}
+
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    [segue destinationViewController];
+}
+
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/test/TestAfpViewController.h

@@ -0,0 +1,17 @@
+//
+//  TestAfpViewController.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2024/7/10.
+//  Copyright © 2024 chengzihao.ds. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface TestAfpViewController : UIViewController
+
+@end
+
+NS_ASSUME_NONNULL_END

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/test/TestAfpViewController.m

@@ -0,0 +1,265 @@
+//
+//  TestAfpViewController.m
+//  SpeechDemo
+//
+//  Created by chengzihao.ds on 2024/7/10.
+//  Copyright © 2024 chengzihao.ds. All rights reserved.
+//
+
+#import "TestAfpViewController.h"
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+
+@interface AfpPressureTask : NSObject
+
+@property (nonatomic, strong) NSThread *thread;
+@property (nonatomic, strong) SpeechEngine *engine;
+@property (nonatomic, weak) NSString *debugPath;
+@property (nonatomic, assign) int resultType;
+@property (nonatomic, assign) int taskId;
+@property (nonatomic, assign) BOOL running;
+
+- (instancetype)initWithTaskId:(int)taskId;
+- (void)startTask;
+- (void)stopTask;
+- (void)taskLoop;
+- (int)fetchResult;
+
+@end
+
+@implementation AfpPressureTask
+
+- (instancetype)initWithTaskId:(int)taskId {
+    self = [super init];
+    if (self) {
+        _taskId = taskId;
+        _running = YES;
+        _engine = NULL;
+        _debugPath = NULL;
+        _thread = [[NSThread alloc] initWithTarget:self selector:@selector(taskLoop) object:nil];
+    }
+    return self;
+}
+
+- (void)startTask {
+    [self.thread start];
+}
+
+- (void)stopTask {
+    self.running = NO;
+}
+
+- (void)taskLoop {
+    @autoreleasepool {
+        NSString *path = [self.debugPath stringByAppendingPathComponent:@"test_afp.pcm"];
+        while (self.running) {
+            @autoreleasepool {
+                // Init
+                self.engine = [[SpeechEngine alloc] init];
+                [self.engine createEngineWithDelegate:nil];
+                [self.engine setStringParam:SE_AFP_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+                SEEngineErrorCode ret = [self.engine initEngine];
+                if (ret != SENoError) {
+                    NSLog(@"Init Engine failed: %d", ret);
+                }
+
+                // Process
+                NSError *error;
+                NSData *data = [NSData dataWithContentsOfFile:path options:NSDataReadingMappedIfSafe error:&error];
+                if (data) {
+                    // Read success.
+                    ret = [self.engine ProcessAudio:(int16_t *)data.bytes length:(int32_t)(data.length / 2) isFinal:TRUE];
+                    if (ret != SENoError) {
+                        NSLog(@"Process Audio failed: %d", ret);
+                    }
+                }
+
+                // FetchResult
+                ret = [self fetchResult];
+                if (ret != SENoError) {
+                    NSLog(@"Fetch Result failed: %d", ret);
+                }
+
+                // Reset
+                ret = [self.engine ResetEngine];
+                if (ret != SENoError) {
+                    NSLog(@"Reset Engine failed: %d", ret);
+                }
+
+                // Destroy
+                [self.engine destroyEngine];
+                self.engine = nil;
+            }
+        }
+        NSLog(@"Task %d has stopped", self.taskId);
+    }
+}
+
+- (int) fetchResult {
+    @autoreleasepool {
+        NSString *filename;
+        if (self.resultType == SEAfpResult) {
+            filename = [NSString stringWithFormat:@"test_afp_out_%d.bytes", self.taskId];
+        } else {
+            filename = [NSString stringWithFormat:@"test_afp_out_%d.json", self.taskId];
+        }
+
+        if (self.resultType == SEAfpResult) {
+            NSData *result;
+            SEEngineErrorCode ret = [self.engine FetchResult:&result];
+            if (ret != SENoError) {
+                NSLog(@"Fetch Result failed: %d", ret);
+                return ret;
+            }
+
+            NSFileHandle *file = [FileUtils openFileForWriting:filename inPath:self.debugPath];
+            [FileUtils writeData:result toFileHandel:file];
+            [FileUtils closeFile:file];
+        } else if (self.resultType == SEAfpSliceResult) {
+            NSString* result = [self.engine FetchStringResult:SEAfpSliceResult];
+            // 提取err_code的值
+            NSError *error;
+            NSDictionary *jsonResult = [NSJSONSerialization JSONObjectWithData:[result dataUsingEncoding:NSUTF8StringEncoding] options:0 error:&error];
+            int errCode = [jsonResult[@"err_code"] intValue];
+            if (errCode != SENoError) {
+                NSLog(@"Fetch Result failed: %d", errCode);
+                return errCode;
+            }
+
+            NSFileHandle *file = [FileUtils openFileForWriting:filename inPath:self.debugPath];
+            [FileUtils writeString:result toFileHandel:file];
+            [FileUtils closeFile:file];
+        }
+    }
+    return 0;
+}
+
+@end
+
+@interface TestAfpViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+
+@property (strong, nonatomic) NSMutableArray<AfpPressureTask *> *tasks;
+
+@property (nonatomic, strong) NSString *deviceID;
+@property (strong, nonatomic) NSString *debugPath;
+
+// Settings
+@property (strong, nonatomic) Settings *settings;
+@end
+
+@implementation TestAfpViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    [self.statusTextView setText:@"Waiting for init."];
+    [self decorateTextView:self.resultTextView];
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_TEST_AFP];
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self stopPressureTest];
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+
+#pragma mark - UI Actions
+
+- (IBAction)startStopPressureTest:(id)sender {
+    if (self.tasks == NULL) {
+        [self startPressureTest];
+        [self.resultTextView setText: [NSString stringWithFormat:@"压测开始: %d个实例", [self.settings getInt: SETTING_AFP_INSTANCE_NUMBER]]];
+    } else {
+        [self stopPressureTest];
+        [self.resultTextView setText: @"压测结束"];
+    }
+}
+
+#pragma mark - Init Methods
+
+- (void)startPressureTest {
+    if (self.tasks != NULL) {
+        return;
+    }
+    
+    self.tasks = [NSMutableArray array];
+    for (int i = 0; i < [self.settings getInt: SETTING_AFP_INSTANCE_NUMBER]; i++) {
+        AfpPressureTask *task = [[AfpPressureTask alloc] initWithTaskId:i];
+        task.resultType = [self getResultType];
+        task.debugPath = self.debugPath;
+        [self.tasks addObject:task];
+        [task startTask];
+    }
+}
+
+- (void)stopPressureTest {
+    if (self.tasks == NULL) {
+        return;
+    }
+
+    // 停止所有任务
+    for (AfpPressureTask *task in self.tasks) {
+        [task stopTask];
+    }
+    
+    // 保证全部任务执行完毕
+    for (AfpPressureTask *task in self.tasks) {
+        while (![task.thread isFinished]) {
+            [NSThread sleepForTimeInterval:0.1];
+        }
+    }
+
+    self.tasks = NULL;
+}
+
+#pragma mark - Helper
+- (SEResultType)getResultType {
+    SettingOptions* resultTypeOptions = [self.settings getOptions:SETTING_AFP_RESULT_TYPE];
+    switch (resultTypeOptions.chooseIdx) {
+        case 0:
+            return SEAfpResult;
+        case 1:
+        default:
+            return SEAfpSliceResult;
+    }
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_TEST_AFP forKey:@"viewId"];
+}
+
+@end
+
+

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/test/TestAsrOfflineRtfViewController.h

@@ -0,0 +1,13 @@
+//
+//  TestAsrOfflineRtfViewController.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2023/6/6.
+//  Copyright © 2023 chengzihao.ds. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface TestAsrOfflineRtfViewController : UIViewController
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/test/TestAsrOfflineRtfViewController.m

@@ -0,0 +1,339 @@
+//
+//  TestAsrOfflineRtfViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2023/6/6.
+//  Copyright © 2023 chengzihao.ds. All rights reserved.
+//
+
+#import "TestAsrOfflineRtfViewController.h"
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+
+@interface TestAsrOfflineRtfViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *engineInitButton;
+@property (weak, nonatomic) IBOutlet UIButton *engineUninitButton;
+@property (weak, nonatomic) IBOutlet UIButton *startEngineButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopEngineButton;
+
+@property (strong, nonatomic) SpeechEngine *curEngine;
+@property (assign, nonatomic) BOOL engineStarted;
+
+@property (nonatomic, strong) NSString *deviceID;
+@property (nonatomic, assign) long feedTimestamp;
+@property (nonatomic, assign) int audioLength;
+@property (strong, nonatomic) NSString *debugPath;
+
+// settings
+@property (strong, nonatomic) Settings *settings;
+
+@end
+
+@implementation TestAsrOfflineRtfViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_TEST_ASR_OFFLINE_RTF];
+    
+    self.engineInitButton.enabled = TRUE;
+    self.engineUninitButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+    [self.statusTextView setText:@"Waiting for init."];
+    [self decorateTextView:self.resultTextView];
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    self.engineStarted = FALSE;
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self uninitEngine];
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+#pragma mark - SpeechEngineDelegate
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    switch (type) {
+        case SEEngineStart:
+            [self speechEngineStarted];
+            break;
+        case SEEngineStop:
+            [self speechEngineStopped];
+            break;
+        case SEEngineError:
+            [self speechEngineError:data];
+            break;
+        case SEAsrPartialResult:
+            [self speechEngineResult:data isFinal:FALSE];
+            break;
+        case SEFinalResult:
+            [self speechEngineResult:data isFinal:TRUE];
+            break;
+        case SEVolumeLevel:
+            NSLog(@"volume level: %s", (char*)data.bytes);
+            break;
+        case SEEngineLog:
+            NSLog(@"engine log: %s", (char*)data.bytes);
+            break;
+        default:
+            break;
+    }
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)initEngine:(id)sender {
+    [self initEngine];
+}
+
+- (IBAction)uninitEngine:(id)sender {
+    if (self.engineStarted) {
+        [self.statusTextView setText:@"Engine is busy, stop it first!"];
+        return;
+    }
+    [self uninitEngine];
+    [self.resultTextView setTextColor:UIColor.grayColor];
+    [self.resultTextView setText:@"点击或按住说话后，展示语音识别结果"];
+}
+
+- (IBAction)startEngine:(id)sender {
+    NSLog(@"Start engine.");
+    [self.curEngine setStringParam:[self.settings getString:SETTING_APPID] forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_ENABLE_ITN] forKey:SE_PARAMS_KEY_ASR_ENABLE_ITN_BOOL];
+    [self.curEngine setBoolParam:FALSE forKey:SE_PARAMS_KEY_ASR_AUTO_STOP_BOOL];
+    
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+    if (ret == SERecCheckEnvironmentFailed) {
+        [self speechEngineNoPermission];
+        return;
+    }
+}
+
+- (IBAction)stopEngine:(id)sender {
+    NSLog(@"Stop engine.");
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+}
+
+#pragma mark - Init Methods
+
+- (void)initEngine {
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    if (appDelegate.deviceID.length < 1) {
+        self.engineInitButton.enabled = FALSE;
+        dispatch_async(dispatch_get_main_queue(), ^{
+            [self.statusTextView setText:@"Waiting for get deviceID."];
+            sleep(1);
+            [self initEngine];
+        });
+        return;
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+    
+    
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+    }
+    if (![self.curEngine createEngineWithDelegate:self]) {
+        NSLog(@"Create speech engine failed.");
+        return;
+    }
+
+    [self.resultTextView setTextColor:UIColor.blackColor];
+    NSLog(@"Engine version: %@", [self.curEngine getVersion]);
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"Debug path: %@", self.debugPath);
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.curEngine setStringParam:SE_LOG_LEVEL_TRACE forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+    [self.curEngine setStringParam:[self.settings getString:SETTING_APPID] forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    [self.curEngine setStringParam:@"388808087185088" forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setIntParam:1 forKey:SE_PARAMS_KEY_CHANNEL_NUM_INT];
+    [self.curEngine setBoolParam:FALSE forKey:SE_PARAMS_KEY_ASR_AUTO_STOP_BOOL];
+    [self.curEngine setStringParam:@"" forKey:SE_PARAMS_KEY_ASR_REC_PATH_STRING];
+    if ([self.settings getBool:SETTING_ASR_RECORDER_SAVE]) {
+        [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_ASR_REC_PATH_STRING];
+    }
+    [self.curEngine setStringParam:SE_RECORDER_TYPE_STREAM forKey:SE_PARAMS_KEY_RECORDER_TYPE_STRING];
+    [self.curEngine setStringParam:SE_ASR_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+    [self.curEngine setIntParam:16000 forKey:SE_PARAMS_KEY_SAMPLE_RATE_INT];
+    [self.curEngine setBoolParam:true forKey:SE_PARAMS_KEY_ASR_SHOW_UTTER_BOOL];
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_SHOW_LANGUAGE] forKey:SE_PARAMS_KEY_ASR_SHOW_LANG_BOOL];
+    [self.curEngine setBoolParam:true forKey:SE_PARAMS_KEY_ASR_SHOW_VOLUME_BOOL];
+    [self.curEngine setIntParam:SEAsrWorkModeOfflineFlute forKey:SE_PARAMS_KEY_ASR_WORK_MODE_INT];
+    NSString* modelsPath = [NSString stringWithFormat:@"%@/models", self.debugPath];
+    [self.curEngine setStringParam:modelsPath forKey:SE_PARAMS_KEY_ASR_OFF_RESOURCE_PATH_STRING];
+    NSLog(@"Models path: %@", modelsPath);
+    
+    SEEngineErrorCode ret = [self.curEngine initEngine];
+    if (ret != SENoError) {
+        NSLog(@"Init Engine failed: %ld", ret);
+    }
+    if (ret == SENoError) {
+        [self speechEngineInitOk];
+    } else {
+        [self speechEngineInitFailed];
+    }
+}
+
+- (void)uninitEngine {
+    [self.curEngine destroyEngine];
+    self.curEngine = nil;
+    self.engineInitButton.enabled = TRUE;
+    self.engineUninitButton.enabled = FALSE;
+    self.startEngineButton.enabled = FALSE;
+    self.stopEngineButton.enabled = FALSE;
+}
+
+- (void)setHotWords:(NSString*) hotWords {
+    [self.curEngine sendDirective:SEDirectiveUpdateAsrHotWords data: hotWords];
+}
+
+#pragma mark - Engine Callback
+
+- (void)speechEngineNoPermission {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"No permission!"];
+        self.engineInitButton.enabled = TRUE;
+        self.engineUninitButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineInitOk {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.statusTextView setText:@"Ready"];
+        [self.resultTextView setText:[NSString stringWithFormat:@"DeviceID: %@", self.deviceID]];
+        self.engineUninitButton.enabled = TRUE;
+        self.engineInitButton.enabled = FALSE;
+        self.startEngineButton.enabled = TRUE;
+    });
+}
+
+- (void)speechEngineInitFailed {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self uninitEngine];
+        [self.statusTextView setText:@"Failed to init engine!"];
+        self.engineInitButton.enabled = TRUE;
+        self.engineUninitButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineStarted {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.engineStarted = true;
+        [self.statusTextView setText:@"Engine Started!"];
+        self.startEngineButton.enabled = FALSE;
+        self.stopEngineButton.enabled = TRUE;
+        
+        // Read whole file into nsdata.
+        NSString* filePath = [NSString stringWithFormat:@"%@/%@", self.debugPath, @"asr_rec_file.pcm"];
+        NSData *fileData = [NSData dataWithContentsOfFile:filePath];
+        if (!fileData) {
+            [self.resultTextView setText:@"ERROR: File asr_rec_file.pcm not found!"];
+            [self stopEngine:NULL];
+            return;
+        }
+
+        int maxLength = [self.settings getInt:SETTING_STREAM_PACKAGE_DURATION] * 16 * 2;
+        int16_t* feedData = (int16_t*) malloc(maxLength * sizeof(int16_t));
+        self.audioLength = MIN(maxLength, [fileData length]);
+        memcpy(feedData, [fileData bytes], self.audioLength);
+        self.feedTimestamp = [[NSDate date] timeIntervalSince1970] * 1000;
+        [self.curEngine feedAudio:feedData length:self.audioLength / 2];
+        [self.curEngine sendDirective:SEDirectiveFinishTalking];
+
+        free(feedData);
+        feedData = NULL;
+    });
+}
+
+- (void)speechEngineStopped {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        self.engineStarted = FALSE;
+        [self.statusTextView setText:@"Engine Stopped!"];
+        self.startEngineButton.enabled = TRUE;
+        self.stopEngineButton.enabled = FALSE;
+    });
+}
+
+- (void)speechEngineResult:(NSData *)data isFinal:(BOOL)isFinal {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        long delay = 0;
+        if (isFinal) {
+            long current = [[NSDate date] timeIntervalSince1970] * 1000;
+            delay = current - self.feedTimestamp;
+        }
+        
+        NSError *error;
+        NSDictionary *jsonResult = [NSJSONSerialization JSONObjectWithData:data
+                                                                   options:NSJSONReadingMutableContainers
+                                                                     error:&error];
+        NSMutableString *text = [[NSMutableString alloc] initWithString:@""];
+        if (![jsonResult objectForKey:@"result"]) {
+            return;
+        }
+        [text appendFormat:@"result: %@", [[[jsonResult objectForKey:@"result"] firstObject] objectForKey:@"text"]];
+        if (isFinal) {
+            [text appendFormat:@"\naudio_length: %ld", self.audioLength];
+            [text appendFormat:@"\nresponse_delay: %ld", delay];
+            [text appendFormat:@"\nrtf: %f", (float) delay / (self.audioLength / 16 / 2)];
+        }
+        if (text.length) {
+            [self.resultTextView setText:[text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+            NSLog(@"asr test result: %@", text);
+        }
+    });
+}
+
+- (void)speechEngineError:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]];
+    });
+}
+
+- (void)setResultText:(NSString *)result {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[result stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+    });
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_TEST_ASR_OFFLINE_RTF forKey:@"viewId"];
+}
+
+@end
+

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/test/TestAsrViewController.h

@@ -0,0 +1,13 @@
+//
+//  AsrViewController.h
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/8.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface TestAsrViewController : UIViewController
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/test/TestAsrViewController.m

@@ -0,0 +1,519 @@
+//
+//  TestAsrViewController.m
+//  SpeechDemo
+//
+//  Created by bytedance on 2020/9/8.
+//  Copyright © 2020 fengkai.0518. All rights reserved.
+//
+
+#import "TestAsrViewController.h"
+
+#import <AVFoundation/AVFoundation.h>
+
+#import "AppDelegate.h"
+#import "FileUtils.h"
+#import "SettingsHelper.h"
+#import "ViewController.h"
+#import "SensitiveDefines.h"
+
+@interface TestAsrViewController () <SpeechEngineDelegate, UITextViewDelegate>
+
+// UI
+@property (weak, nonatomic) IBOutlet UITextView *resultTextView;
+@property (weak, nonatomic) IBOutlet UITextField *statusTextView;
+@property (weak, nonatomic) IBOutlet UIButton *startButton;
+@property (weak, nonatomic) IBOutlet UIButton *stopButton;
+
+// Device ID: 用于定位线上问题
+@property (nonatomic, strong) NSString *deviceID;
+// Debug Path: 用于存放一些 SDK 相关的文件，比如模型、日志等
+@property (strong, nonatomic) NSString *debugPath;
+
+// SpeechEngine
+@property (strong, nonatomic) SpeechEngine *curEngine;
+
+// Settings
+@property (strong, nonatomic) Settings *settings;
+
+// APP 层自定义的录音机，在音频来源为 Stream 时使用
+@property (weak, nonatomic) StreamRecorder *streamRecorder;
+
+// 一些用于统计的字段
+@property (nonatomic, assign) long talkingFinisheTimestamp;
+
+// 压测相关
+@property (nonatomic, assign) NSInteger stressSceneId;
+@property (assign, nonatomic) BOOL stressStarted;
+@property (nonatomic, strong) NSThread *testThread;
+@end
+
+@implementation TestAsrViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+    
+    self.startButton.enabled = TRUE;
+    self.stopButton.enabled = TRUE;
+    self.stressStarted = FALSE;
+    self.testThread = nil;
+    
+    [self decorateTextView:self.resultTextView];
+    [self.resultTextView setTextColor:UIColor.blackColor];
+    
+    [ViewController setAppDelegate:(AppDelegate *)[[UIApplication sharedApplication] delegate]];
+    
+    self.streamRecorder = [ViewController getStreamRecorder];
+    self.settings = [[SettingsHelper shareInstance]getSettings:VIEW_TEST_ASR_STRESS];
+}
+
+- (void)viewDidDisappear:(BOOL)animated {
+    [self uninitEngine];
+    [super viewDidDisappear:animated];
+}
+
+- (void)decorateTextView:(UITextView *)textView {
+    textView.layer.cornerRadius = 5.0f;
+    textView.layer.borderWidth = .25f;
+    textView.layer.borderColor = [UIColor grayColor].CGColor;
+}
+
+#pragma mark - Config & Init & Uninit Methods
+
+-(void)configInitParams{
+    //【必需配置】Engine Name
+    [self.curEngine setStringParam:SE_ASR_ENGINE forKey:SE_PARAMS_KEY_ENGINE_NAME_STRING];
+    
+    //【可选配置】Debug & Log
+    [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_DEBUG_PATH_STRING];
+    [self.curEngine setStringParam:SE_LOG_LEVEL_DEBUG forKey:SE_PARAMS_KEY_LOG_LEVEL_STRING];
+
+    //【可选配置】UID & deviceID: 用于定位线上问题
+    [self.curEngine setStringParam:SDEF_UID forKey:SE_PARAMS_KEY_UID_STRING];
+    [self.curEngine setStringParam:self.deviceID forKey:SE_PARAMS_KEY_DEVICE_ID_STRING];
+    
+    //【必需配置】配置音频来源
+    [self.curEngine setStringParam:[self.settings getOptionsValue:SETTING_RECORD_TYPE] forKey:SE_PARAMS_KEY_RECORDER_TYPE_STRING];
+    
+    if ([self.settings getBool:SETTING_ASR_RECORDER_SAVE]) {
+        //【可选配置】录音文件保存路径，如配置，SDK会将录音保存到该路径下，文件格式为 .wav
+        [self.curEngine setStringParam:self.debugPath forKey:SE_PARAMS_KEY_ASR_REC_PATH_STRING];
+    }
+    
+    // 当音频来源为 RECORDER_TYPE_STREAM 时，如输入音频采样率不等于 16K，需添加如下配置
+    if ([self.settings getOptionsValue:SETTING_RECORD_TYPE] == SE_RECORDER_TYPE_STREAM) {
+        if ([self.streamRecorder getSampleRate] != 16000) {
+            // 当音频来源为 RECORDER_TYPE_STREAM 时【必需配置】，否则【无需配置】
+            // 启用 SDK 内部的重采样
+            [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ENABLE_RESAMPLER_BOOL];
+            // 将重采样所需的输入采样率设置为 APP 层输入的音频的实际采样率
+            [self.curEngine setIntParam:[self.streamRecorder getSampleRate] forKey:SE_PARAMS_KEY_CUSTOM_SAMPLE_RATE_INT];
+        }
+    }
+    
+    NSString *address = [self.settings getString:SETTING_ADDRESS];
+    if (!address.length) {
+        address = SDEF_DEFAULT_ADDRESS;
+    }
+    NSLog(@"Current address: %@", address);
+    //【必需配置】识别服务域名
+    [self.curEngine setStringParam:address forKey:SE_PARAMS_KEY_ASR_ADDRESS_STRING];
+    
+    NSString *uri = [self.settings getString:SETTING_URI];
+    if (!uri.length) {
+        uri = SDEF_ASR_DEFAULT_URI;
+    }
+    NSLog(@"Current uri: %@", uri);
+    //【必需配置】识别服务Uri
+    [self.curEngine setStringParam:uri forKey:SE_PARAMS_KEY_ASR_URI_STRING];
+    
+    NSString* appID = [self.settings getString:SETTING_APPID];
+    //【必需配置】鉴权相关：Appid
+    [self.curEngine setStringParam:appID.length <= 0 ? SDEF_APPID : appID forKey:SE_PARAMS_KEY_APP_ID_STRING];
+    //【必需配置】鉴权相关：Token
+    NSString* token = [self.settings getString:SETTING_TOKEN];
+    [self.curEngine setStringParam:token.length <= 0 ? SDEF_TOKEN : token forKey:SE_PARAMS_KEY_APP_TOKEN_STRING];
+
+    NSString* cluster = [self.settings getString:SETTING_CLUSTER];
+    NSLog(@"Current cluster: %@", cluster);
+    //【必需配置】识别服务所用集群
+    [self.curEngine setStringParam:cluster.length <= 0 ? SDEF_ASR_DEFAULT_CLUSTER : cluster forKey:SE_PARAMS_KEY_ASR_CLUSTER_STRING];
+    
+    //【可选配置】在线请求的建连与接收超时，一般不需配置使用默认值即可
+    [self.curEngine setIntParam:3000 forKey:SE_PARAMS_KEY_ASR_CONN_TIMEOUT_INT];
+    [self.curEngine setIntParam:5000 forKey:SE_PARAMS_KEY_ASR_RECV_TIMEOUT_INT];
+    
+    NSString* recPath = @"";
+    if ([self.settings getBool:SETTING_RECORD_SAVE]) {
+        recPath = self.debugPath;
+    }
+    [self.curEngine setStringParam:recPath forKey:SE_PARAMS_KEY_REC_PATH_STRING];
+    [self.curEngine setIntParam:[self.settings getOptions:SETTING_RECORD_FILE_TYPE].chooseIdx forKey:SE_PARAMS_KEY_REC_FILE_TYPE_INT];
+}
+
+-(void)configStartAsrParams{
+    //【可选配置】控制识别结果的配置
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_ENABLE_DDC] forKey:SE_PARAMS_KEY_ASR_ENABLE_DDC_BOOL];
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_ENABLE_ITN] forKey:SE_PARAMS_KEY_ASR_ENABLE_ITN_BOOL];
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_ASR_ENABLE_NLU_PUNC] forKey:SE_PARAMS_KEY_ASR_SHOW_NLU_PUNC_BOOL];
+    
+    //【可选配置】控制识别结果返回的形式，全量返回或增量返回，默认为全量
+    [self.curEngine setStringParam:[self.settings getOptionsValue:SETTING_ASR_RESULT_TYPE] forKey:SE_PARAMS_KEY_ASR_RESULT_TYPE_STRING];
+
+    //【可选配置】控制 ASR 中的 VAD 模块的阈值的配置
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_ASR_VAD_START_SILENCE_TIME] forKey:SE_PARAMS_KEY_ASR_VAD_START_SILENCE_TIME_INT];
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_ASR_VAD_END_SILENCE_TIME] forKey:SE_PARAMS_KEY_ASR_VAD_END_SILENCE_TIME_INT];
+    [self.curEngine setStringParam:[self.settings getString:SETTING_ASR_VAD_MODE] forKey:SE_PARAMS_KEY_ASR_VAD_MODE_STRING];
+    //【可选配置】用户音频输入最大时长，仅一句话识别场景生效，单位毫秒，默认为 150000ms.
+    [self.curEngine setIntParam:[self.settings getInt:SETTING_VAD_MAX_SPEECH_DURATION] forKey:SE_PARAMS_KEY_VAD_MAX_SPEECH_DURATION_INT];
+    
+    //【可选配置】控制是否返回录音音量，在 APP 需要显示音频波形时可以启用
+    [self.curEngine setBoolParam:[self.settings getBool:SETTING_GET_VOLUME] forKey:SE_PARAMS_KEY_ENABLE_GET_VOLUME_BOOL];
+    
+    //【可选配置】更新 ASR 热词
+    if ([self.settings getString:SETTING_ASR_HOTWORDS].length != 0) {
+        [self setHotWords:[self.settings getString:SETTING_ASR_HOTWORDS]];
+    }
+    
+    if ([self.settings getOptionsValue:SETTING_RECORD_TYPE] == SE_RECORDER_TYPE_STREAM) {
+        if (![self.streamRecorder start]) {
+            [self speechEngineNoPermission];
+        }
+    } else if ([self.settings getOptionsValue:SETTING_RECORD_TYPE] == SE_RECORDER_TYPE_FILE) {
+        // 使用音频文件识别时，需要设置文件的绝对路径
+        NSString* file_path = [NSString stringWithFormat:@"%@/%@", self.debugPath, @"asr_rec_file.pcm"];
+        NSLog(@"输入的音频文件路径: %@", file_path);
+        // 使用音频文件识别时【必须配置】，否则【无需配置】
+        [self.curEngine setStringParam:file_path forKey:SE_PARAMS_KEY_RECORDER_FILE_STRING];
+    }
+}
+
+- (void)setHotWords:(NSString*) hotWords {
+    [self.curEngine sendDirective:SEDirectiveUpdateAsrHotWords data: hotWords];
+}
+
+- (void)initEngine {
+    NSLog(@"获取设备ID，调试使用");
+    AppDelegate *appDelegate = [ViewController getAppDelegate];
+    if (appDelegate == nil) {
+        appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
+    }
+    [ViewController setAppDelegate:appDelegate];
+    self.deviceID = appDelegate.deviceID;
+    if ([self.deviceID isEqualToString:@""]) {
+        self.deviceID = @"speech_test_123";
+    }
+    NSLog(@"获取设备ID成功: %@", self.deviceID);
+    
+    
+    NSLog(@"创建引擎");
+    if (self.curEngine == nil) {
+        self.curEngine = [[SpeechEngine alloc] init];
+        if (![self.curEngine createEngineWithDelegate:self]) {
+            NSLog(@"引擎创建失败.");
+            return;
+        }
+    }
+    NSLog(@"SDK 版本号: %@", [self.curEngine getVersion]);
+    
+    self.debugPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+    NSLog(@"当前调试路径: %@", self.debugPath);
+    
+    NSLog(@"配置初始化参数");
+    [self configInitParams];
+    
+    NSLog(@"引擎初始化");
+    SEEngineErrorCode ret = [self.curEngine initEngine];
+    if (ret == SENoError) {
+        NSLog(@"初始化成功");
+    } else {
+        NSLog(@"初始化失败，返回值: %d", ret);
+    }
+}
+
+- (void)uninitEngine {
+    if (self.curEngine != nil) {
+        NSLog(@"引擎析构");
+        [self.curEngine destroyEngine];
+        self.curEngine = nil;
+        NSLog(@"引擎析构完成");
+    }
+}
+
+- (void)startEngine {
+    NSLog(@"配置启动参数");
+    [self configStartAsrParams];
+
+    //【可选配置】是否启用云端自动判停，仅一句话识别场景生效
+    NSLog(@"开启 ASR 云端自动判停");
+    [self.curEngine setBoolParam:TRUE forKey:SE_PARAMS_KEY_ASR_AUTO_STOP_BOOL];
+    
+    NSLog(@"启用引擎.");
+    NSLog(@"Directive: SEDirectiveStartEngine");
+    SEEngineErrorCode ret = [self.curEngine sendDirective:SEDirectiveStartEngine];
+    if (ret == SERecCheckEnvironmentFailed) {
+        [self speechEngineNoPermission];
+    }
+}
+
+- (void)stopEngine {
+    NSLog(@"异步关闭引擎");
+    NSLog(@"Directive: SEDirectiveStopEngine");
+    [self.curEngine sendDirective:SEDirectiveStopEngine];
+}
+
+- (void)syncStopEngine {
+    NSLog(@"同步关闭引擎");
+    NSLog(@"Directive: SEDirectiveStopEngine");
+    [self.curEngine sendDirective:SEDirectiveSyncStopEngine];
+}
+
+- (void)finishTalking {
+    NSLog(@"结束音频输入");
+    NSLog(@"Directive: SEDirectiveFinishTalking");
+    [self.curEngine sendDirective:SEDirectiveFinishTalking];
+}
+
+- (void)speechEngineNoPermission {
+    NSLog(@"没有音频权限");
+}
+
+- (void)sleep:(NSTimeInterval)ti {
+    [NSThread sleepForTimeInterval:ti];
+}
+
+- (int)getRandomValue:(int)a andData:(int)b {
+    return (arc4random() % (b + 1)) + a;
+}
+
+- (void)testScene0 {
+    [self initEngine];
+    while (self.stressStarted) {
+        [self syncStopEngine];
+        [self startEngine];
+        [self sleep:[self getRandomValue:0 andData:3]];
+        if ([self getRandomValue:0 andData:1] == 0) {
+            [self finishTalking];
+        } else {
+            [self stopEngine];
+        }
+        [self sleep:[self getRandomValue:0 andData:3]];
+    }
+    [self uninitEngine];
+}
+
+- (void)testScene1 {
+    while (self.stressStarted) {
+        [self initEngine];
+        [self syncStopEngine];
+        [self startEngine];
+        [self sleep:[self getRandomValue:0 andData:3]];
+        if ([self getRandomValue:0 andData:1] == 0) {
+            [self finishTalking];
+        } else {
+            [self stopEngine];
+        }
+        [self sleep:[self getRandomValue:0 andData:3]];
+        [self uninitEngine];
+    }
+}
+
+- (void)testScene2 {
+    while (self.stressStarted) {
+        [self initEngine];
+        [self syncStopEngine];
+        [self startEngine];
+        [self sleep:1];
+        [self finishTalking];
+        [self sleep:2];
+        [self uninitEngine];
+    }
+}
+
+- (void)testScene3 {
+    [self initEngine];
+    while (self.stressStarted) {
+        int method = [self getRandomValue:0 andData:4];
+        switch (method) {
+            case 0:
+                [self startEngine];
+                break;
+            case 1:
+                [self syncStopEngine];
+                break;
+            case 2:
+                [self stopEngine];
+                break;
+            case 3:
+                [self finishTalking];
+                break;
+            case 4:
+                [self uninitEngine];
+                [self initEngine];
+                break;
+        }
+        [self sleep:[self getRandomValue:0 andData:5]];
+    }
+    [self uninitEngine];
+}
+
+- (void)test {
+    NSString* sceneid = [self.settings getOptionsValue:SETTING_ASR_STRESS_SCENEID];
+    NSArray* sceneType = @[@"正常场景1", @"正常场景2", @"ERROR回调时析构", @"随机压测"];
+    self.stressSceneId = [sceneType indexOfObject:sceneid];
+    dispatch_async(dispatch_get_main_queue(), ^{
+        NSString* str = [@"开始压测 " stringByAppendingString:sceneType[self.stressSceneId]];
+        [self setResultText:str];
+    });
+    switch (self.stressSceneId) {
+        case 0:
+            [self testScene0];
+            break;
+        case 1:
+            [self testScene1];
+            break;
+        case 2:
+            [self testScene2];
+            break;
+        case 3:
+            [self testScene3];
+            break;
+        default:
+            break;
+    }
+    dispatch_async(dispatch_get_main_queue(), ^{
+        NSString* str = [@"压测结束 " stringByAppendingString:sceneType[self.stressSceneId]];
+        [self setResultText:str];
+    });
+}
+
+#pragma mark - UI Actions
+
+- (IBAction)startBtnClicked:(id)sender {
+    if (self.testThread) {
+        if (self.testThread.executing) {
+            NSLog(@"Already start!");
+            return;
+        }
+        [self.testThread cancel];
+        self.testThread = nil;
+    }
+    self.stressStarted = TRUE;
+    self.testThread = [[NSThread alloc] initWithTarget:self selector:@selector(test) object:nil];
+    [self.testThread start];
+    
+}
+
+- (IBAction)stopBtnClicked:(id)sender {
+    if (!self.testThread) {
+        NSLog(@"Not start yet!");
+        return;
+    }
+    self.stressStarted = FALSE;
+}
+
+#pragma mark - Message Callback
+
+- (void)onMessageWithType:(SEMessageType)type andData:(NSData *)data {
+    NSLog(@"Message Type: %d.", type);
+    switch (type) {
+        case SEEngineStart:
+            // Callback: 引擎启动成功回调
+            NSLog(@"Callback: 引擎启动成功");
+            break;
+        case SEEngineStop:
+            // Callback: 引擎关闭回调
+            NSLog(@"Callback: 引擎关闭");
+            break;
+        case SEEngineError:
+            // Callback: 错误信息回调
+            NSLog(@"Callback: 错误信息: %@", data);
+            [self speechEngineError:data];
+            break;
+        case SEAsrPartialResult:
+            // Callback: ASR 当前请求的部分结果回调
+            NSLog(@"Callback: ASR 当前请求的部分结果");
+            break;
+        case SEFinalResult:
+            // Callback: ASR 当前请求最终结果回调
+            NSLog(@"Callback: ASR 当前请求最终结果");
+            [self speechEngineResult:data isFinal:true];
+            break;
+        case SEVolumeLevel:
+            // Callback: 录音音量回调
+            NSLog(@"Callback: 录音音量");
+            break;
+        default:
+            break;
+    }
+}
+
+- (void)speechEngineError:(NSData *)data {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if (self.stressSceneId == 2) {
+            if ([self getRandomValue:0 andData:1] == 0) {
+                [self stopEngine];
+            }
+            [self uninitEngine];
+        }
+    });
+}
+
+- (void)speechEngineResult:(NSData *)data isFinal:(BOOL)isFinal {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        if (isFinal && self.stressSceneId == 2) {
+            if ([self getRandomValue:0 andData:1] == 0) {
+                [self stopEngine];
+            }
+            [self uninitEngine];
+        }
+    });
+}
+
+#pragma mark - Helper
+
+- (NSString *)getRecorderType {
+    SettingOptions* recorderTypeOptions = [self.settings getOptions:SETTING_RECORD_TYPE];
+    switch (recorderTypeOptions.chooseIdx) {
+        case 0:
+            return SE_RECORDER_TYPE_RECORDER;
+        case 1:
+            return SE_RECORDER_TYPE_FILE;
+        case 2:
+            return SE_RECORDER_TYPE_STREAM;
+        default:
+            break;
+    }
+    return @"";
+}
+
+- (void)setResultText:(NSString *)result {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.resultTextView setText:[result stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]];
+    });
+}
+
+- (long)timeDelayFrom:(long)pastTimestamp {
+    return [[NSDate date] timeIntervalSince1970] * 1000 - pastTimestamp;
+}
+
+#pragma mark - UITextViewDelegate
+
+- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
+    if([text isEqualToString:@"\n"]) {
+        [textView resignFirstResponder];
+        return NO;
+    }
+    return YES;
+}
+
+#pragma mark - Navigation
+
+// In a storyboard-based application, you will often want to do a little preparation before navigation
+- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
+    // Get the new view controller using [segue destinationViewController].
+    // Pass the selected object to the new view controller.
+    id nextPage = [segue destinationViewController];
+    [nextPage setValue:VIEW_TEST_ASR_STRESS forKey:@"viewId"];
+}
+
+@end

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/ui/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,107 @@
+{
+  "images" : [
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "asr_lark_bot_ico_40_40.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "20x20",
+      "idiom" : "iphone",
+      "filename" : "asr_lark_bot_ico_60_60.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "asr_lark_bot_ico_58_58.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "29x29",
+      "idiom" : "iphone",
+      "filename" : "asr_lark_bot_ico_87_87.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "asr_lark_bot_ico_80_80.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "40x40",
+      "idiom" : "iphone",
+      "filename" : "asr_lark_bot_ico_120_120.png",
+      "scale" : "3x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "asr_lark_bot_ico_120_120-1.png",
+      "scale" : "2x"
+    },
+    {
+      "size" : "60x60",
+      "idiom" : "iphone",
+      "filename" : "asr_lark_bot_ico_180_180.png",
+      "scale" : "3x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "20x20",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "20x20",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "29x29",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "29x29",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "40x40",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "40x40",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "76x76",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "76x76",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "ipad",
+      "size" : "83.5x83.5",
+      "scale" : "2x"
+    },
+    {
+      "size" : "1024x1024",
+      "idiom" : "ios-marketing",
+      "filename" : "asr_lark_bot_ico_1024_1024.png",
+      "scale" : "1x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/ui/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/ui/Assets.xcassets/asr.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "asr_60_60.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "asr_120_120.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "asr_180_180.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/ui/Assets.xcassets/capt.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "capt_60_60.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "capt_120_120.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "capt_180_180.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/ui/Assets.xcassets/fulllink.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "fulllink_60_60.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "fulllink_120_120.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "fulllink_180_180.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/ui/Assets.xcassets/settings.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "settings.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "settings-1.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "settings-2.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

avatar_flutter_app/demo/SpeechDemoIOS/SpeechDemo/ui/Assets.xcassets/tts.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "tts_60_60.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "tts_120_120.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "tts_180_180.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}