byte[] processPacket(byte[] alacFrame)
{
if (alacFrame == null)
{
return(silence);
}
int[] outBuffer = new int[(audioSession.FrameSize + 3) * 2];
int outputsize = AlacDecodeUtils.DecodeFrame(audioSession.AlacFile, alacFrame, outBuffer);
if (outputsize != audioSession.FrameSize * 4)
{
Logger.Warn("Alac Decoder: Unexpected audio frame size. Expected: {0}, Actual: {1}", audioSession.FrameSize * 4, outputsize);
}
int actualDataLength;
if (manageBuffer)
{
int[] output = new int[outBuffer.Length];
actualDataLength = stuffBuffer(audioSession.Filter.PlaybackRate, outBuffer, output) * 2;
outBuffer = output;
}
else
{
actualDataLength = audioSession.FrameSize * 2;
}
byte[] pcmData = new byte[actualDataLength * 2];
int j = 0;
for (int i = 0; i < actualDataLength; i++)
{
//PCM data is received in big endian - we need little
pcmData[j++] = (byte)(outBuffer[i]);
pcmData[j++] = (byte)(outBuffer[i] >> 8);
}
return(pcmData);
}
AlacFile createAlac()
{
if (sampleSize != 16)
{
return(null);
}
AlacFile alac = AlacDecodeUtils.create_alac(sampleSize, 2);
alac.setinfo_max_samples_per_frame = frameSize;
alac.setinfo_7a = _7a;
alac.setinfo_sample_size = sampleSize;
alac.setinfo_rice_historymult = rice_historymult;
alac.setinfo_rice_initialhistory = rice_initialhistory;
alac.setinfo_rice_kmodifier = rice_kmodifier;
alac.setinfo_7f = channels;
alac.setinfo_80 = _80;
alac.setinfo_82 = _82;
alac.setinfo_86 = _86;
alac.setinfo_8a_rate = sampleRate;
return(alac);
}
