/// <summary>
/// Calculates a VAD decision for an audio frame.
///
/// </summary>
/// <param name="frame">array of 16-bit samples</param>
/// <param name="length">must be 10, 20 or 30 ms, so for 8khz, lenght should be 80, 160, or 240</param>
/// <returns></returns>
public unsafe bool HasActiveVoice(Int16[] frame, int length)
{
int result = LibfvadNative.fvad_process(fvad, frame, length);
if (result == -1)
{
throw new ArgumentException("invalid frame length");
}
return(result == 1);
}
private bool disposedValue = false; // To detect redundant calls
protected unsafe virtual void Dispose(bool disposing)
{
if (!disposedValue)
{
if (disposing)
{
// TODO: dispose managed state (managed objects).
LibfvadNative.fvad_free(fvad);
}
// TODO: free unmanaged resources (unmanaged objects) and override a finalizer below.
// TODO: set large fields to null.
disposedValue = true;
}
}
/// <summary>
/// Sets the input sample rate in Hz for a VAD instance.
/// <para>
/// Valid values are 8000, 16000, 32000 and 48000. The default is 8000.
/// </para>
/// </summary>
/// <param name="sample_rate"></param>
/// <returns></returns>
public unsafe bool SetSampleRate(int sample_rate)
{
return(LibfvadNative.fvad_set_sample_rate(fvad, sample_rate) == 0);
}
/// <summary>
/// resets state and sets mode and sample rate to default
/// </summary>
public unsafe void Reset()
{
LibfvadNative.fvad_reset(fvad);
}
/// <summary>
/// Changes the VAD operating ("aggressiveness") mode of a VAD instance. Default is "quality"
/// </summary>
/// <param name="mode"></param>
/// <returns></returns>
public unsafe bool SetMode(FvadAgroMode mode)
{
int result = LibfvadNative.fvad_set_mode(fvad, (int)mode);
return(result == 0);
}
public unsafe Libfvad()
{
fvad = LibfvadNative.fvad_new();
}
