void audioSink_RawFrameAvailable(object sender, Common.EventArgs <byte[]> e)
{
//todo: frame length is invalid. must equal to 20ms
byte[] frame = e.Value;
var src = new short[frame.Length / sizeof(short)];
Buffer.BlockCopy(frame, 0, src, 0, frame.Length);
int srcOffset = 0;
_again:
int srcAvailable = src.Length - srcOffset;
int dstRemaining = buffer.Length - bufferPos;
int cb = Math.Min(srcAvailable, dstRemaining);
Array.Copy(src, srcOffset, buffer, bufferPos, cb);
srcOffset += cb;
bufferPos += cb;
if (bufferPos == buffer.Length)
{
voiceActivityDetector.WebRtcVad_CalcVad16khz(buffer, buffer.Length);
bufferPos = 0;
goto _again;
}
SaveSamplesForDebug(frame);
}
public void Filter(short[] sampleData)
{
VadDecision = _vad.WebRtcVad_CalcVad16khz(sampleData, sampleData.Length);
if (_vadViewModel != null)
{
_vadViewModel.Decision = VadDecision > 0 ? 0.9 : 0;
}
if (VadDecision == 0)
{
Array.Clear(sampleData, 0, sampleData.Length);
IsSilent = true;
}
else
{
IsSilent = false;
}
}