app-starlock/star_lock/lib/talk/call/callTalk.dart

import 'dart:typed_data';
import 'package:flutter/foundation.dart';
import 'package:get/get.dart';
import 'package:star_lock/talk/call/g711.dart';
import 'package:star_lock/talk/call/iFrameInfo.dart';
import '../../tools/eventBusEventManage.dart';
import 'package:flutter_pcm_sound/flutter_pcm_sound.dart';

class CallTalk {
  static CallTalk? _manager;
  static int POS_iframe_index = 63;
  static int POS_alen = 65;
  static int POS_blen = 73;
  static int POS_bag_index = 71;
  static int POS_bag_num = 69;
  static int POS_data = 77;
  static int ABUF_NUM = 100;
  static int FIRSTINDEX = 1;

  int status = 0; // 假设有这个成员变量
  IframeInfo? iframe; // 假设有这个成员变量
  bool getFirstFrame = false; //是否得到了第一帧
  List<int> allDataBytes = <int>[]; //音频数据

  CallTalk._init() {
    iframe = IframeInfo();
    FlutterPcmSound.setLogLevel(LogLevel.error);
    FlutterPcmSound.setup(sampleRate: 8000, channelCount: 1);
    FlutterPcmSound.setFeedThreshold(8000 ~/ 2);
  }

  static CallTalk _share() {
    _manager ??= CallTalk._init();
    return _manager!;
  }

  factory CallTalk() => _share();
  CallTalk get manager => _share();

  Future<void> getAVData(Uint8List bb, int len) async {
    // 音频数据
    if (bb[61] == 1) {
      // print('音频数据来了');
      Uint8List g711Data = bb.sublist(77, bb.length);

      List<int> pcmBytes;
      try {
        // 将 ALaw 转为 Linear
        pcmBytes = G711().convertList(g711Data);
        allDataBytes.addAll(pcmBytes);

        // String filePath = 'assets/s10-g711.bin';
        //
        // List<int> audioData = await G711().readAssetFile(filePath);
        // pcmBytes = G711().convertList(audioData);
        // allDataBytes = pcmBytes.sublist(0, 640);

        _initializeAudioPlayer(pcmBytes);
      } catch (e) {
        print('Error decoding G.711 to PCM: $e');
      }
    }
    // 视频数据
    else {
      // print('********视频数据来了');
      // 音视频数据开始下标
      var bagLen = bb[POS_blen + 2] + bb[POS_blen + 3] * 256;
      // print('音视频数据开始下标 bagLen：$bagLen');

      // 获取帧序号 63
      int getIframeIndex =
          bb[POS_iframe_index] + bb[POS_iframe_index + 1] * 256;
      // print('获取帧序号 getIframeIndex：$getIframeIndex');

      // 获取帧长度 65
      // int alen = bb[POS_alen] & 0xff;
      // var alenList = bb.sublist(POS_alen, POS_alen + 4);
      // int alen = ((0xff & alenList[(0)]) << 24 |
      // (0xff & alenList[1]) << 16 |
      // (0xff & alenList[2]) << 8 |
      // (0xFF & alenList[3]));
      // print('获取帧长度 alen：$alen');

      // 当前包号 71
      int getBagIndex = bb[POS_bag_index] & 0xff;
      // print('当前包号 getBagIndex：$getBagIndex');
      // 总包数 69
      int getBagNum = bb[POS_bag_num] & 0xff;
      // print('总包数 getBagNum：$getBagNum');
      // 数据长度 73
      int blen = bb[POS_blen] + bb[POS_blen + 1] * 256;
      // print('数据长度 blen：$blen');

      // 这里判断是否是同一帧，如果不是同一帧就重新创建一个 IframeInfo
      if (getIframeIndex != iframe!.iframeIndex) {
        iframe = IframeInfo();
        iframe!.iframeIndex = getIframeIndex;
        iframe!.bagNum = getBagNum;
        // iframe!.cur_len = alen;
        iframe!.bb = [];
        // growableList = iframe!.bb!.toList(growable: true);
      }

      iframe!.bagReceive++;

      // 如果是同一帧就添加起来
      if (getIframeIndex == iframe!.iframeIndex) {
        var getList = bb.sublist(77, bb.length);
        iframe!.bb!.addAll(getList);
      }
      // print('iframe.bagNum: ${iframe!.bagNum} iframe.bagReceive: ${iframe!.bagReceive}');

      // 如果收到的包数等于总包数，说明这一帧数据已经接收完毕
      if (iframe!.bagNum == iframe!.bagReceive) {
        // print('播放第${iframe!.iframeIndex}帧 一帧图片的hexStringData: ${Uint8List.fromList(growableList)}');
        eventBus.fire(GetTVDataRefreshUI(iframe!.bb!));
      }
    }
  }

  //音频相关处理
  Future<void> _initializeAudioPlayer(List<int> audioData) async {
    Get.log('_initializeAudioPlayer audioData:$audioData');

    PcmArrayInt16 fromList = PcmArrayInt16.fromList(audioData);
    // FlutterPcmSound.setFeedCallback(onFeed);
    await FlutterPcmSound.feed(fromList);
    FlutterPcmSound.play();
  }

  void onFeed(int remainingFrames) async {
    int framesToFeed = 320;

    if (allDataBytes.length >= framesToFeed) {
      List<int> frames = allDataBytes.sublist(0, framesToFeed);
      allDataBytes.removeRange(0, framesToFeed);

      // 将数据传递给 FlutterPcmSound
      PcmArrayInt16 fromList = PcmArrayInt16.fromList(frames);
      await FlutterPcmSound.feed(fromList);
      FlutterPcmSound.play();
    } else {
      // 处理长度不足的情况，可以等待更多数据或者采取其他措施
      print("Not enough data in allPcmData.");
    }
  }

  //停止接收音频数据
  void stopPcmSound() {
    // FlutterPcmSound.setup(sampleRate: 8000, channelCount: 1);
    FlutterPcmSound.pause();
    FlutterPcmSound.clear();
    FlutterPcmSound.stop();

    iframe = IframeInfo();
    iframe!.iframeIndex = 0;
    iframe!.bagNum = 0;
    iframe!.bagReceive = 0;
    iframe!.bb = [];
  }
}