/// <summary>
///
/// </summary>
public async Task StopSpeechClient()
{
if (null != speechClient)
{
await SpeechClient.ShutdownDefaultChannelsAsync();
speechClient = null;
}
}
public static async Task <List <string> > reconocerVoz(int tiempo)
{
List <string> listaSoluciones = new List <string>();
if (NAudio.Wave.WaveIn.DeviceCount < 1)
{
Debug.Log("Sin microfono");
return(listaSoluciones);
}
var speech = SpeechClient.Create();
var streamingCall = speech.StreamingRecognize();
//Configuración de petición inicial
await streamingCall.WriteAsync(
new StreamingRecognizeRequest()
{
StreamingConfig = new StreamingRecognitionConfig()
{
Config = new RecognitionConfig()
{
Encoding = RecognitionConfig.Types.AudioEncoding.Linear16,
SampleRateHertz = 16000,
LanguageCode = "es-ES",
},
InterimResults = true,
SingleUtterance = true //dejará de reconocer cuando se detecte que se ha dejado de hablar
}
}
);
//Muestra las respuestas cuando llegan
Task pintaRespuestas = Task.Run(async() =>
{
while (await streamingCall.ResponseStream.MoveNext(default(CancellationToken)))
{
foreach (var result in streamingCall.ResponseStream.Current.Results)
{
foreach (var alternative in result.Alternatives)
{
Debug.Log(alternative.Transcript);
listaSoluciones.Add(alternative.Transcript);
}
}
}
});
//leer de microfono y enviar a la API
object writeLock = new object();
bool writeMore = true;
var waveIn = new NAudio.Wave.WaveInEvent();
waveIn.DeviceNumber = 0;
waveIn.WaveFormat = new NAudio.Wave.WaveFormat(16000, 1);
waveIn.DataAvailable += (object sender, NAudio.Wave.WaveInEventArgs args) =>
{
lock (writeLock)
{
if (!writeMore)
{
return;
}
streamingCall.WriteAsync(
new StreamingRecognizeRequest()
{
AudioContent = Google.Protobuf.ByteString.CopyFrom(args.Buffer, 0, args.BytesRecorded)
}
).Wait();
}
};
waveIn.StartRecording();
Debug.Log("Habla");
grabando = true;
await Task.Delay(TimeSpan.FromSeconds(tiempo));
//deja de grabar y termina
waveIn.StopRecording();
grabando = false;
lock (writeLock) writeMore = false;
await streamingCall.WriteCompleteAsync();
await pintaRespuestas;
await SpeechClient.ShutdownDefaultChannelsAsync();
return(listaSoluciones);
}