实时语音识别

  int appID = 0; // 腾讯云 appID
  int projectID = 0; //腾讯云 projectID
  String secretID = ""; //腾讯云 secretID
  String secretKey = ""; // 腾讯云 projectKey

  String engine_model_type = "16k_zh"; //设置引擎，不设置默认16k_zh
  int filter_dirty = 0; //是否过滤脏词，具体的取值见API文档的filter_dirty参数
  int filter_modal = 0; //过滤语气词具体的取值见API文档的filter_modal参数
  int filter_punc = 0; //过滤句末的句号具体的取值见API文档的filter_punc参数
  int convert_num_mode = 1; //是否进行阿拉伯数字智能转换。具体的取值见API文档的convert_num_mode参数
  String hotword_id = ""; //热词id。具体的取值见API文档的hotword_id参数
  String customization_id = ""; //自学习模型id,详情见API文档
  int vad_silence_time = 0; //语音断句检测阈值,详情见API文档
  int needvad = 1; //人声切分,详情见API文档
  int word_info = 0; //是否显示词级别时间戳,详情见API文档
  int reinforce_hotword = 0; //热词增强功能,详情见API文档

  bool is_compress = true; //是否开启音频压缩,开启后使用opus压缩传输数据
  bool silence_detect = false; //静音检测功能,开启后检测到静音会停止识别
  int silence_detect_duration = 5000; //静音检测时长,开启静音检测功能后生效
  bool is_save_audio_file = false; //是否保存音频,仅对内置录音生效,格式为s16le,16000Hz,mono的pcm,开启后会通过NOTIFY类型的ASRData返回到上层,其中ASRData中info为以下的JSON格式{"type":"onAudioFile, "code": 0, "message": "audio file path"}
  String audio_file_path = ""; //is_save_audio_file为true时,会将音频保存在指定位置

Future<ASRController> build() async <--> 创建ASRController

var _config = ASRControllerConfig()
_config.filter_dirty = 1;
_config.filter_modal = 0;
_config.filter_punc = 0;
var _controller = await _config.build();

Stream<ASRData> recognize() async* <--> 开始识别,通过监听Stream可以获得实时语音识别的相关数据
Stream<ASRData> recognizeWithDataSource(Stream<Uint8List>? source) async* <--> 开始识别,可传入自定义数据源进行识别,有关数据源的要求参考自定义数据源
stop() async <--> 停止识别
release() async <--> 释放资源

try {
    if (_controller != null) {
      await _controller?.release();
    }
    _controller = await _config.build();
    setState(() {
      _btn_onclick = stopRecognize;
    });
    await for (final val in _controller!.recognize()) {
      switch (val.type) {
        case ASRDataType.SLICE:
        case ASRDataType.SEGMENT:
          var id = val.id!;
          var res = val.res!;
          if (id >= _sentences.length) {
            for (var i = _sentences.length; i <= id; i++) {
              _sentences.add("");
            }
          }
          _sentences[id] = res;
          setState(() {
            _result = _sentences.map((e) => e).join("");
          });
          break;
        case ASRDataType.SUCCESS:
          setState(() {
            _btn_onclick = startRecognize;
            _result = val.result!;
            _sentences = [];
          });
          break;
      }
    }
  } on ASRError catch (e) {
    setState(() {
      _btn_onclick = startRecognize;
      _result = "错误码：${e.code} \\n错误信息: ${e.message} \\n详细信息: ${e.resp}";
    });
  } catch (e) {
    log(e.toString());
    setState(() {
      _btn_onclick = startRecognize;
    });
  }
}

ASRDataType type; //数据类型
int? id; //句子的id
String? res; //数据类型为SLICE和SEGMENT时返回部分识别结果
String? result; // 数据类型SUCCESS时返回所有识别结果

enum ASRDataType {
  SLICE,
  SEGMENT,
  SUCCESS,
}

int code; //错误码 iOS参考QCloudRealTimeClientErrCode Android参考ClientException
String message; //错误消息
String? resp; //服务端返回的原始数据