public static OpusDecoderNative Create(int sampleRate, int channel)
{
var error = OpusPInvoke.ErrorCodes.OK;
var temp = OpusPInvoke.OpusDecoderCreate(sampleRate, channel, ref error);
if (error < OpusPInvoke.ErrorCodes.OK)
{
throw new Exception(OpusPInvoke.GetMessage(error));
}
return(temp);
}
public int GetSamplesNumber(byte[] data, int offset, int len)
{
var dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
try
{
int number = OpusPInvoke.OpusDecoderGetNbSamples(
handle,
IntPtr.Add(dataHandle.AddrOfPinnedObject(), offset), len);
if (number < (int)OpusPInvoke.ErrorCodes.OK)
{
throw new Exception(OpusPInvoke.GetMessage((OpusPInvoke.ErrorCodes)number));
}
return(number);
}
finally
{
dataHandle.Free();
}
}
public int Decode(byte[] data, int dataOffset, int dataLen, short[] pcm, int pcmOffset, int pcmLength, bool decodeFec)
{
var dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
var pcmHandle = GCHandle.Alloc(pcm, GCHandleType.Pinned);
try
{
int decoded = OpusPInvoke.OpusDecode(
handle,
IntPtr.Add(dataHandle.AddrOfPinnedObject(), dataOffset), dataLen,
IntPtr.Add(pcmHandle.AddrOfPinnedObject(), pcmOffset * sizeof(short)), pcmLength,
decodeFec ? 1 : 0);
if (decoded < (int)OpusPInvoke.ErrorCodes.OK)
{
throw new Exception(OpusPInvoke.GetMessage((OpusPInvoke.ErrorCodes)decoded));
}
return(decoded);
}
finally
{
dataHandle.Free();
pcmHandle.Free();
}
}
protected override bool ReleaseHandle()
{
OpusPInvoke.OpusDecoderDestroy(handle);
handle = IntPtr.Zero;
return(IsInvalid);
}