deepvoice_client/lib/modules/meeting/controllers/meeting_controller.dart

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:get/get.dart';

import '../../../data/services/asr_service.dart';

class MeetingController extends GetxController
    with GetSingleTickerProviderStateMixin {
  late AnimationController lottieController;
  late AsrService _asrService;

  Timer? timer;

  RxBool isRecording = false.obs; //是否录音中
  RxInt seconds = 0.obs;

  RxString intermediateContent = ''.obs;
  RxString finalContent = ''.obs;

  StreamSubscription? _recognitionSubscription;

  @override
  void onInit() {
    super.onInit();
    lottieController = AnimationController(vsync: this);
    _asrService = Get.find<AsrService>();
  }

  @override
  void onClose() {
    lottieController.dispose();
    timer?.cancel();
    _asrService.stopContinuousRecognition();
    _recognitionSubscription?.cancel();
    super.onClose();
  }

  // 点击开始、暂停按钮
  void recorderHandle() {
    if (isRecording.value) {
      _pause();
    } else {
      _start();
    }
  }

  // 开始
  void _start() async {
    await _startRecorder();
    lottieController.repeat();
    isRecording.value = true;
    timer = Timer.periodic(const Duration(seconds: 1), (_) => seconds++);
  }

  // 暂停
  void _pause() async {
    await _stopRecorder();
    lottieController.stop();
    isRecording.value = false;
    timer?.cancel();
  }

  //开始录音
  Future<void> _startRecorder() async {
    final recognitionStream = await _asrService.startContinuousRecognition();
    _recognitionSubscription = recognitionStream.listen(
      _handleRecognitionEvent,
    );
  }

  //结束录音
  Future<void> _stopRecorder() async {
    await _asrService.stopContinuousRecognition();
    _recognitionSubscription?.cancel();
  }

  // 处理语音识别事件
  void _handleRecognitionEvent(RecognitionEvent event) {
    switch (event.type) {
      case RecognitionEventType.intermediateResult:
        intermediateContent.value = event.text;
        break;
      case RecognitionEventType.finalResult:
        finalContent.value += event.text;
        intermediateContent.value = '';
        break;
      default:
        // 不做任何处理
        break;
    }
  }

  // 完成
  void complete() async {
    Get.back();
  }
}