onWTNDataMessageReceived method

FutureOr<void> onWTNDataMessageReceived(
  1. dynamic streamId,
  2. dynamic message,
  3. dynamic sourceType
)
override

@detail callback @valid since 3.60. @author hanchenchen @brief The data information contained in the callback of WTN stream..
After calling subscribeWTNAudioStream{@link #IWTNStream#subscribeWTNAudioStream}/subscribeWTNVideoStream{@link #IWTNStream#subscribeWTNVideoStream}, you can listen to this callback and retrieve SEI messages inserted by Open API calls or audio volume. @param streamId ID of the WTN stream @param message The received data message's content is as follows:

  • Data inserted by calling the OpenAPI.
  • Media volume in JSON, before you can receive which you need to enable it via calling the OpenAPI. Refer to the definition below to parse the JSON string. {
    "Type" : "VolumeIndication", //Specific business type.
    "VolumeInfos" : [ // Business type corresponding information
    {
    "RoomId":"1000001", // Room ID
    "UserId":"1000001", // User ID
    "StreamType":0, // 0:camera stream；1:screen stream
    "LinearVolume":1 // LinearVolume
    }
    @param sourceType Message source. See DataMessageSourceType{@link #DataMessageSourceType}. @note You also need to listen to onWTNSEIMessageReceived{@link #IWTNStreamEventHandler#onWTNSEIMessageReceived} to receive SEI inserted via API by the client SDK. @order 6

Implementation

FutureOr<void> onWTNDataMessageReceived(
    dynamic streamId, dynamic message, dynamic sourceType) async {
  if ($instance == null || $instance is! IWTNStreamEventHandler) {
    return;
  }
  return ($instance as IWTNStreamEventHandler).onWTNDataMessageReceived?.call(
      streamId.toString(),
      message,
      t_DataMessageSourceType.android_to_code(
          $p_a.DataMessageSourceType.values.firstWhere(
              (t) => t.$value == sourceType || t.name == sourceType)));
}