public void RespectsOffsetAndCount()
{
var sp = new SilenceProvider(new WaveFormat(44100, 2));
var length = 10;
var b = Enumerable.Range(1, length).Select(n => (byte)1).ToArray();
var read = sp.Read(b, 2, 4);
Assert.AreEqual(4, read);
Assert.AreEqual(new byte[] { 1, 1, 0, 0, 0, 0, 1, 1, 1, 1 }, b);
}
public void CanReadSilence()
{
var sp = new SilenceProvider(new WaveFormat(44100, 2));
var length = 1000;
var b = Enumerable.Range(1, length).Select(n => (byte)1).ToArray();
var read = sp.Read(b, 0, length);
Assert.AreEqual(length, read);
Assert.AreEqual(new byte[length], b);
}
private static async Task <bool> MakeAudioConfigAsync(SpeechHandler handler)
{
// var audioConfig = AudioConfig.FromWavFileInput(@"D:\Users\ManabuTonosaki\OneDrive - tomarika\tono.wav");
// var audioConfig = AudioConfig.FromDefaultMicrophoneInput();
Debug.Assert(handler.Device != null);
var wavein = new WasapiLoopbackCapture(handler.Device);
var waveoutFormat = new WaveFormat(16000, 16, 1);
var lastSpeakDT = DateTime.Now;
var willStop = DateTime.MaxValue;
wavein.DataAvailable += (s, e) =>
{
if (e.BytesRecorded > 0)
{
using var ms = new MemoryStream(e.Buffer, 0, e.BytesRecorded);
using var rs = new RawSourceWaveStream(ms, wavein.WaveFormat);
using var freq = new MediaFoundationResampler(rs, waveoutFormat.SampleRate);
var w16 = freq.ToSampleProvider().ToMono().ToWaveProvider16();
var len = w16.Read(handler.buf, 0, handler.buf.Length);
handler.AudioInputStream.Write(handler.buf, len);
lastSpeakDT = DateTime.Now;
willStop = DateTime.MaxValue;
}
else
{
if (DateTime.Now < willStop)
{
if (willStop == DateTime.MaxValue)
{
willStop = DateTime.Now + TimeSpan.FromSeconds(10);
}
var silence = new SilenceProvider(waveoutFormat);
var len = silence.Read(handler.buf, 0, waveoutFormat.BitsPerSample * waveoutFormat.SampleRate / 8 / 100); // 10ms
var cnt = (int)((DateTime.Now - lastSpeakDT).TotalMilliseconds / 10);
for (var i = 0; i < cnt; i++)
{
handler.AudioInputStream.Write(handler.buf, len);
}
lastSpeakDT = DateTime.Now;
}
}
};
var audioformat = AudioStreamFormat.GetWaveFormatPCM(samplesPerSecond: 16000, bitsPerSample: 16, channels: 1);
handler.AudioInputStream = AudioInputStream.CreatePushStream(audioformat);
handler.AudioConfig = AudioConfig.FromStreamInput(handler.AudioInputStream);
await Task.Delay(100);
handler.StopRequested += (s, e) =>
{
wavein.StopRecording();
};
wavein.StartRecording();
return(true);
}
