78 lines
2.4 KiB
Dart
78 lines
2.4 KiB
Dart
// 功能描述：故障描述语音识别适配，应用只复用一个系统识别实例，不保存录音。
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// 版本：1.0.0。
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import 'package:speech_to_text/speech_to_text.dart';
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/// 识别结果为本轮完整短句；调用方负责替换临时结果，不能逐次追加。
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abstract interface class RepairSpeech {
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Future<bool> start({
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required void Function(String) onWords,
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required void Function(String) onError,
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required void Function() onDone,
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});
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Future<void> stop();
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Future<void> cancel();
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}
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/// 系统回调只初始化一次，每轮重新绑定当前界面，离页后忽略迟到结果。
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class SystemRepairSpeech implements RepairSpeech {
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SystemRepairSpeech._();
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static final SystemRepairSpeech instance = SystemRepairSpeech._();
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final SpeechToText _speech = SpeechToText();
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void Function(String)? _words, _error;
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void Function()? _done;
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int _generation = 0;
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@override
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Future<bool> start({
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required void Function(String) onWords,
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required void Function(String) onError,
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required void Function() onDone,
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}) async {
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final generation = ++_generation;
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_words = onWords;
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_error = onError;
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_done = onDone;
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final available = await _speech.initialize(
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onError: (error) => _error?.call(error.errorMsg),
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onStatus: (status) {
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if (status == SpeechToText.doneStatus) _done?.call();
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},
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options: [SpeechToText.androidNoBluetooth],
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);
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if (generation != _generation || !available) return false;
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final locales = await _speech.locales();
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if (generation != _generation) return false;
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String? locale;
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for (final item in locales) {
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if (item.localeId.toLowerCase().replaceAll('_', '-') == 'zh-cn') {
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locale = item.localeId;
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break;
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}
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}
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await _speech.listen(
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onResult: (result) {
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if (generation == _generation) _words?.call(result.recognizedWords);
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},
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listenOptions: SpeechListenOptions(
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localeId: locale,
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partialResults: true,
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cancelOnError: true,
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listenMode: ListenMode.dictation,
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listenFor: const Duration(seconds: 45),
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pauseFor: const Duration(seconds: 5),
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),
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);
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return generation == _generation;
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}
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@override
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Future<void> stop() => _speech.stop();
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@override
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Future<void> cancel() async {
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++_generation;
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_words = null;
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_error = null;
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_done = null;
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await _speech.cancel();
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}
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}
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