private void WriteAudio(byte[] audioData)
{
try
{
AsyncDuplexStreamingCall <StreamingRecognitionRequest, StreamingRecognitionResponse> call = this.ActiveCall();
StreamingRecognitionRequest rR = new StreamingRecognitionRequest();
rR.AudioContent = Google.Protobuf.ByteString.CopyFrom(audioData);
call.RequestStream.WriteAsync(rR).Wait();
}
catch (RpcException ex) //when (ex.StatusCode == StatusCode.DeadlineExceeded)
{
Log.Error($"during data sent error: {ex.Message} with status {ex.Status} code {ex.StatusCode}");
throw ex;
}
}
private const int MAX_BYTES_SENT = 10 * 1024 * 1024; // check https://cloud.yandex.com/docs/speechkit/stt/streaming#session-restrictions for limitation details
private AsyncDuplexStreamingCall <StreamingRecognitionRequest, StreamingRecognitionResponse> ActiveCall()
{
if (this._call != null)
{
try
{
Status status = this._call.GetStatus();
log.Information($"Call status: ${status.StatusCode} ${status.Detail}");
this._call.Dispose();
this._call = null;
if (this._readTask != null)
{
log.Information($"Call status: ${status.StatusCode} ${status.Detail}. Disposing.");
this._readTask.Dispose(); // Close read task
}
this._readTask = null;
// call is finished
}
catch (Exception ex)
{
log.Information($"Call is in process - reuse. ${ex.Message}");
return(this._call);
}
}
try
{
Log.Information($"Initialize gRPC call is finished");
this._call = speechKitRpctClient.StreamingRecognize(
headers: this.MakeMetadata(),
deadline: DateTime.UtcNow.AddMinutes(5)); // check https://cloud.yandex.com/docs/speechkit/stt/streaming#session-restrictions for limitation details
this.bytesSent = 0; // reset bytes counter
StreamingRecognitionRequest rR = new StreamingRecognitionRequest();
rR.Config = this.rConf;
this._call.RequestStream.WriteAsync(rR).Wait();
// Start reading task for call
if (this._readTask == null)
{
this._readTask = SpeechToTextResponseReader.ReadResponseStream(this._call);
}
return(this._call);
}
catch (RpcException ex) //when (ex.StatusCode == StatusCode.DeadlineExceeded)
{
Log.Warning($"gRPC request on create exception {ex.Message} with status {ex.Status} code {ex.StatusCode}");
// Maximum duration exeeded reestablish connection
if (ex.StatusCode == StatusCode.DeadlineExceeded) //|| StatusCode=\"InvalidArgument\", Detail=\"audio should be less than 10MB\")"
{
return(ActiveCall());
}
else
{
throw ex;
}
}
catch (Exception ex) //when (ex.StatusCode == StatusCode.DeadlineExceeded)
{
Log.Error($"during data sent exception {ex.Message} ");
throw ex;
}
}