fdp
1 year ago
20 changed files with 2336 additions and 211 deletions
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import 'dart:async'; |
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import 'dart:typed_data'; |
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/// 语音识别服务接口 |
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abstract class AstService { |
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/// 支持的语言 |
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List<String> get supportedLanguages; |
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/// 初始化语音识别服务 |
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Future<bool> initialize({required List<String> supportedLanguages}); |
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/// 开始录音 |
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Future<bool> enableRecord(String filePath); |
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/// 停止录音 |
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Future<bool> stopContinuousTranslation(bool isSave); |
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/// 开始录音 |
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Future<bool> path(String filePath); |
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} |
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/// 识别事件类型 |
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// enum RecognitionEventType { |
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// /// 最终识别结果 |
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// finalResult, |
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// /// 中间识别结果（实时反馈） |
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// intermediateResult, |
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// /// 音频 |
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// onAudio, |
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// /// 会话开始 |
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// sessionStarted, |
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// /// 会话结束 |
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// sessionStopped, |
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// /// 识别取消 |
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// canceled, |
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// /// 识别错误 |
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// error, |
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// } |
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/// 识别事件 |
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// class RecognitionEvent { |
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// /// 事件类型 |
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// final RecognitionEventType type; |
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// /// 识别文本（仅在 finalResult 和 intermediateResult 类型中有效） |
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// final String text; |
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// /// 检测到的语言 |
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// final String detectedLanguage; |
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// /// 角色 |
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// final String role; |
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// /// 原始音频 |
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// final Uint8List? audio; |
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// /// 错误信息（仅在 error 和 canceled 类型中有效） |
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// final String error; |
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// RecognitionEvent({ |
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// required this.type, |
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// this.text = '', |
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// this.detectedLanguage = '', |
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// this.role = '', |
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// this.audio, |
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// this.error = '', |
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// }); |
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// /// 创建最终结果事件的快捷构造函数 |
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// factory RecognitionEvent.finalResult({ |
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// required String text, |
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// String detectedLanguage = '', |
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// }) { |
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// return RecognitionEvent( |
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// type: RecognitionEventType.finalResult, |
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// text: text, |
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// detectedLanguage: detectedLanguage, |
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// ); |
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// } |
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// /// 创建错误事件的快捷构造函数 |
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// factory RecognitionEvent.error(String errorMessage) { |
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// return RecognitionEvent( |
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// type: RecognitionEventType.error, |
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// error: errorMessage, |
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// ); |
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// } |
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// /// 检查是否为最终结果 |
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// bool get isFinalResult => type == RecognitionEventType.finalResult; |
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// /// 检查是否为错误 |
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// bool get isError => |
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// type == RecognitionEventType.error || |
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// type == RecognitionEventType.canceled; |
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// @override |
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// String toString() { |
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// return 'RecognitionEvent{type: $type, text: $text, detectedLanguage: $detectedLanguage, error: $error}'; |
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// } |
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// } |
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@ -0,0 +1,164 @@ |
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import 'dart:async'; |
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import '../../../data/models/appconfig.dart'; |
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import 'package:flutter/services.dart'; |
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import '../../../core/utils/logger.dart'; |
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import 'package:get/get.dart'; |
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import '../ast_service.dart'; |
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/// 音频源类型 |
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enum AudioSourceType { |
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microphone, // 使用设备麦克风 |
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external // 使用外部提供的音频数据 |
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} |
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/// Azure 语音识别服务 |
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/// |
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/// 该服务提供了通过平台通道与原生 Microsoft Speech SDK 交互的接口 |
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class AzureAstService extends GetxService implements AstService { |
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static final AzureAstService to = Get.put(AzureAstService()); |
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static const MethodChannel _channel = MethodChannel('azure_speech/ast'); |
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static const EventChannel _eventChannel = |
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EventChannel('azure_speech/ast_events'); |
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// final GetStorage _storage = GetStorage(); |
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bool _isInitialized = false; |
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late final String _subscriptionKey; |
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late final String _serviceRegion; |
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late String _baseUrl; |
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final String _endpoint = '/'; // 修改为根路径 |
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late final String _accessKey; |
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late final String _secretKey; |
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late final String _region; |
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late final String _service; |
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final List<String> _defaultSupportedLanguages = ['zh-CN', 'en-US']; |
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@override |
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List<String> get supportedLanguages => _defaultSupportedLanguages; |
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// 连续识别相关 |
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// bool _isContinuousRecognitionActive = false; |
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// StreamController<RecognitionEvent>? _eventStreamController; |
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// StreamSubscription? _eventSubscription; |
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// 最新的识别结果 |
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String _latestRecognizedText = ''; |
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String get latestRecognizedText => _latestRecognizedText; |
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// 最新检测到的语言 |
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String _latestDetectedLanguage = ''; |
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String get latestDetectedLanguage => _latestDetectedLanguage; |
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// 当前音频源类型 |
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AudioSourceType _audioSourceType = AudioSourceType.microphone; |
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AzureAstService() { |
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_loadConfig(); |
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} |
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/// 从环境变量加载配置 |
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void _loadConfig() { |
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// final _env = _storage.read("ENV") as Map<String, String>; |
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_subscriptionKey = AppConfig.env('AZURE_SPEECH_KEY') ?? ''; |
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_serviceRegion = AppConfig.env('AZURE_SPEECH_REGION') ?? ''; |
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_accessKey = AppConfig.env('VOLCANO_TRANSLATION_ACCESS_KEY') ?? ''; |
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_secretKey = AppConfig.env('VOLCANO_TRANSLATION_SECRET_KEY') ?? ''; |
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_region = AppConfig.env('VOLCANO_TRANSLATION_REGION') ?? 'cn-north-1'; |
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_service = 'translate'; |
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_baseUrl = 'https://translate.volcengineapi.com'; |
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if (_subscriptionKey.isEmpty || _serviceRegion.isEmpty) { |
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throw Exception( |
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'未找到 Azure 语音服务配置。请在 .env 文件中设置 AZURE_SPEECH_KEY 和 AZURE_SPEECH_REGION'); |
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} |
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} |
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@override |
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Future<bool> enableRecord(String filePath) async { |
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try { |
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final bool result = await _channel.invokeMethod('enableRecord', { |
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'filePath': filePath, |
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}); |
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return result; |
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} catch (e) { |
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Logger.error('开始录音: ${e.toString()}'); |
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rethrow; |
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} |
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} |
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@override |
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Future<bool> path(String filePath) async { |
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try { |
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final bool result = await _channel.invokeMethod('path', { |
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'filePath': filePath, |
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}); |
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return result; |
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} catch (e) { |
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Logger.error('开始录音: ${e.toString()}'); |
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rethrow; |
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} |
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} |
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@override |
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Future<bool> stopContinuousTranslation(bool isSave) async { |
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try { |
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final bool result = |
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await _channel.invokeMethod('stopContinuousTranslation', { |
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'isSave': isSave, |
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}); |
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return result; |
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} catch (e) { |
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Logger.error('停止录音: ${e.toString()}'); |
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rethrow; |
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} |
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} |
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@override |
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Future<bool> initialize({ |
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List<String>? supportedLanguages, |
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bool useExternalAudio = false, |
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bool useEchoCancellation = false, |
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}) async { |
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try { |
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final List<String> languages = |
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supportedLanguages ?? _defaultSupportedLanguages; |
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//底层会初始化前释放 |
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// // 检查是否需要重新初始化 |
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// if (_isInitialized) { |
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// await dispose(); |
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// } |
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// 设置音频源类型 |
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_audioSourceType = useExternalAudio |
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? AudioSourceType.external |
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: AudioSourceType.microphone; |
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// Future<bool> initialize({ |
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// required String subscriptionKey, |
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// required String region, |
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// required List<String> supportedLanguages, |
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// required String audioSourceType, |
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// required String translationAccessKey, |
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// required String translationSecretKey, |
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// String translationRegion = 'cn-north-1', |
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// }); |
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final bool result = await _channel.invokeMethod('initialize', { |
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'subscriptionKey': _subscriptionKey, |
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'region': _serviceRegion, |
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'supportedLanguages': languages, |
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'audioSourceType': _audioSourceType.toString().split('.').last, |
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'translationAccessKey': _accessKey, |
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'translationSecretKey': _secretKey, |
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'translationRegion': _region, |
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}); |
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_isInitialized = result; |
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Logger.info('Azure 语音识别服务初始化${result ? '成功' : '失败'}'); |
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return result; |
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} catch (e) { |
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Logger.error('Azure 语音识别服务初始化失败: ${e.toString()}'); |
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_isInitialized = false; |
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rethrow; |
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} |
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} |
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} |
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