protected virtual void OnPartialTranscriptionReceived(PartialTranscriptionReceivedEventArgs e)
{
EventHandler <PartialTranscriptionReceivedEventArgs> handler = PartialTranscriptionReceived;
if (handler != null)
{
handler(this, e);
}
}
public async Task <int> Run(int seconds, string locale)
{
tokenCancelEarly = new CancellationTokenSource();
var streamingCall = speechClient.StreamingRecognize();
// Write the initial request with the config.
await streamingCall.WriteAsync(
new StreamingRecognizeRequest()
{
StreamingConfig = new StreamingRecognitionConfig()
{
Config = new RecognitionConfig()
{
Encoding = RecognitionConfig.Types.AudioEncoding.Linear16,
SampleRateHertz = 16000,
LanguageCode = locale,
EnableAutomaticPunctuation = true,
},
InterimResults = true,
SingleUtterance = true
}
});
// Print responses as they arrive.
Task printResponses = Task.Run(async() =>
{
Console.WriteLine("Start Print");
while (await streamingCall.ResponseStream.MoveNext(default(CancellationToken)))
{
var error = streamingCall.ResponseStream.Current.Error;
if (error != null)
{
Console.WriteLine(String.Format("Code: {0} \"{1}\"", error.Code, error.Message), Color.Red);
tokenCancelEarly.Cancel();
await Task.Delay(TimeSpan.FromSeconds(5));
return;
}
foreach (var result in streamingCall.ResponseStream.Current.Results)
{
if (result.Stability > 0.8)
{
foreach (var alternative in result.Alternatives)
{
if (lastString != alternative.Transcript)
{
// Console.WriteLine(alternative.Transcript);
// Console.SetCursorPosition(0, Console.CursorTop - 1);
PartialTranscriptionReceivedEventArgs args = new PartialTranscriptionReceivedEventArgs();
args.Transcription = alternative.Transcript;
OnPartialTranscriptionReceived(args);
}
lastString = alternative.Transcript;
}
}
if (result.IsFinal != true)
{
continue;
}
foreach (var alternative in result.Alternatives)
{
Console.WriteLine(alternative.Transcript);
CompleteTranscriptionReceivedEventArgs args = new CompleteTranscriptionReceivedEventArgs();
args.Transcription = alternative.Transcript;
OnCompleteTranscriptionReceived(args);
tokenCancelEarly.Cancel();
}
}
}
Console.WriteLine("End Print");
});
// Read from the microphone and stream to API.
object writeLock = new object();
bool writeMore = true;
waveIn.DataAvailable +=
(object sender, NAudio.Wave.WaveInEventArgs waveInEventArgs) =>
{
lock (writeLock)
{
if (!writeMore)
{
return;
}
if (streamingCall != null)
{
streamingCall.WriteAsync(
new StreamingRecognizeRequest()
{
AudioContent = Google.Protobuf.ByteString
.CopyFrom(waveInEventArgs.Buffer, 0, waveInEventArgs.BytesRecorded)
}).Wait();
}
}
};
try
{
await Task.Delay(TimeSpan.FromSeconds(seconds), tokenCancelEarly.Token);
}
catch (TaskCanceledException e)
{
}
finally
{
lock (writeLock) writeMore = false;
await streamingCall.WriteCompleteAsync();
}
// Stop recording and shut down.
await printResponses;
return(0);
}