/// <summary>
/// Produces PCM samples from Opus encoded data.
/// </summary>
/// <param name="inputOpusData">Opus encoded data to decode, null for dropped packet.</param>
/// <param name="dataLength">Length of data to decode.</param>
/// <returns>PCM audio samples.</returns>
public byte[] Decode(byte[] inputOpusData, int dataLength)
{
int frameCount = FrameCount(MaxDataBytes);
int length;
IntPtr decodedPtr = Marshal.AllocHGlobal(MaxDataBytes);
if (inputOpusData == null)
{
length = OpusAPI.opus_decode(_decoder, IntPtr.Zero, 0, decodedPtr, frameCount, (ForwardErrorCorrection) ? 1 : 0);
}
else
{
IntPtr inputPtr = Marshal.AllocHGlobal(inputOpusData.Length);
Marshal.Copy(inputOpusData, 0, inputPtr, inputOpusData.Length);
length = OpusAPI.opus_decode(_decoder, inputPtr, dataLength, decodedPtr, frameCount, 0);
Marshal.FreeHGlobal(inputPtr);
}
if (length < 0)
{
throw new Exception("Decoding failed - " + ((Errors)length).ToString());
}
byte[] decoded = new byte[length * 2];
Marshal.Copy(decodedPtr, decoded, 0, length * 2);
Marshal.FreeHGlobal(decodedPtr);
return(decoded);
}
