public Stream GetWavStream()
{
byte[] dataPCM = null;
int bitsPerSample = BitsPerSample;
switch (Format.Codec)
{
case AwcFormatChunk.CodecFormat.PCM:
dataPCM = Data;
break;
case AwcFormatChunk.CodecFormat.ADPCM:
dataPCM = new byte[Data.Length];
Buffer.BlockCopy(Data, 0, dataPCM, 0, Data.Length);
AwcFile.Decrypt_RSXXTEA(dataPCM, GTA5Keys.PC_AWC_KEY);
dataPCM = DecodeADPCM(dataPCM, SampleCount);
bitsPerSample = 16;
break;
}
int byteRate = SamplesPerSecond * Channels * bitsPerSample / 8;
short blockAlign = (short)(Channels * bitsPerSample / 8);
MemoryStream stream = new MemoryStream();
BinaryWriter w = new BinaryWriter(stream);
int wavLength = 12 + 24 + 8 + Data.Length;
// RIFF chunk
w.Write("RIFF".ToCharArray());
w.Write((int)(wavLength - 8));
w.Write("WAVE".ToCharArray());
// fmt sub-chunk
w.Write("fmt ".ToCharArray());
w.Write((int)16); // fmt size
w.Write((short)1); // 1 = WAVE_FORMAT_PCM
w.Write((short)Channels);
w.Write((int)SamplesPerSecond);
w.Write((int)byteRate);
w.Write((short)blockAlign);
w.Write((short)bitsPerSample);
// data sub-chunk
w.Write("data".ToCharArray());
w.Write((int)dataPCM.Length);
w.Write(dataPCM);
w.Flush();
stream.Position = 0;
return(stream);
}