public LibOpusEncoder(int sampleRate, int channels, int bitRate, int frameDelay)
{
_sampleRate = sampleRate;
// _channels = channels;
// _bitRate = bitRate;
_frameDelay = frameDelay;
_frameSizePerChannel = _sampleRate * _frameDelay / 1000;
_encoderPtr = LibOpus.CreateEncoder(sampleRate, channels, (int)OpusApplication.Audio, out var error);
if (error != OpusError.OK)
{
throw new ExternalException(error.ToString());
}
LibOpus.EncoderCtl(_encoderPtr, OpusCtl.SetSignal, (int)OpusSignal.Music);
LibOpus.EncoderCtl(_encoderPtr, OpusCtl.SetInbandFEC, 1);
LibOpus.EncoderCtl(_encoderPtr, OpusCtl.SetBitrate, bitRate);
LibOpus.EncoderCtl(_encoderPtr, OpusCtl.SetPacketLossPerc, 2);
}
public void Dispose()
{
LibOpus.DestroyEncoder(_encoderPtr);
}
public int EncodeFloat(Span <byte> input, byte[] output)
{
fixed(byte *inPtr = input)
fixed(byte *outPtr = output)
return(LibOpus.EncodeFloat(_encoderPtr, inPtr, FrameSizePerChannel, outPtr, output.Length));
}
public int SetControl(OpusCtl ctl, int value)
{
return(LibOpus.EncoderCtl(_encoderPtr, ctl, value));
}