public static void Copy(EndianReader input, EndianWriter output)
{
// http://stackoverflow.com/questions/230128/best-way-to-copy-between-two-stream-instances-c-sharp
const int BufferSize = 0x1000;
byte[] buffer = new byte[BufferSize];
int read;
while ((read = input.ReadBlock(buffer, 0, BufferSize)) > 0)
output.WriteBlock(buffer, 0, read);
}
public static void Copy(EndianReader input, EndianWriter output, int size)
{
const int BufferSize = 0x1000;
byte[] buffer = new byte[BufferSize];
while (size > 0)
{
int read = input.ReadBlock(buffer, 0, Math.Min(BufferSize, size));
output.WriteBlock(buffer, 0, read);
size -= BufferSize;
}
}
/// <summary>
/// Extracts an xWMA sound and converts it to WAV.
/// </summary>
/// <param name="reader">The stream to read from.</param>
/// <param name="offset">The offset of the data to extract.</param>
/// <param name="rifx">The RIFX data for the sound.</param>
/// <param name="outPath">The path of the file to save to.</param>
public static void ExtractXWMAToWAV(EndianReader reader, int offset, RIFX rifx, string outPath)
{
// Create a temporary file to write an XWMA to
string tempFile = Path.GetTempFileName();
try
{
using (EndianWriter output = new EndianWriter(File.OpenWrite(tempFile), EndianFormat.BigEndian))
{
// Generate a little-endian XWMA header
// TODO: move this into a class?
output.Write(0x52494646); // 'RIFF'
// Recompute the file size because the one Wwise gives us is trash
// fileSize = header size (always 0x2C) + dpds data size + data header size (always 0x8) + data size
int fileSize = 0x2C + rifx.SeekOffsets.Length * 0x4 + 0x8 + rifx.DataSize;
output.EndianType = EndianFormat.LittleEndian;
output.Write(fileSize);
output.EndianType = EndianFormat.BigEndian;
output.Write(RIFFFormat.XWMA);
// Generate the 'fmt ' chunk
output.Write(0x666D7420); // 'fmt '
output.EndianType = EndianFormat.LittleEndian;
output.Write(0x18); // Chunk size
output.Write(rifx.Codec);
output.Write(rifx.ChannelCount);
output.Write(rifx.SampleRate);
output.Write(rifx.BytesPerSecond);
output.Write(rifx.BlockAlign);
output.Write(rifx.BitsPerSample);
// Write the extradata
// Bytes 4 and 5 have to be flipped because they make up an int16
// TODO: add error checking to make sure the extradata is the correct size (0x6)
output.Write((short)0x6);
output.WriteBlock(rifx.ExtraData, 0, 4);
output.Write(rifx.ExtraData[5]);
output.Write(rifx.ExtraData[4]);
// Generate the 'dpds' chunk
// It's really just the 'seek' chunk from the original data but renamed
output.EndianType = EndianFormat.BigEndian;
output.Write(0x64706473); // 'dpds'
output.EndianType = EndianFormat.LittleEndian;
output.Write(rifx.SeekOffsets.Length * 4); // One uint32 per offset
foreach (int seek in rifx.SeekOffsets)
output.Write(seek);
// 'data' chunk
output.EndianType = EndianFormat.BigEndian;
output.Write(0x64617461); // 'data'
output.EndianType = EndianFormat.LittleEndian;
output.Write(rifx.DataSize);
// Copy the data chunk contents from the original RIFX
reader.SeekTo(offset + rifx.DataOffset);
StreamUtil.Copy(reader, output, rifx.DataSize);
}
// Convert it with xWMAEncode
RunProgramSilently("Helpers/xWMAEncode.exe", "\"" + tempFile + "\" \"" + outPath + "\"", Directory.GetCurrentDirectory());
}
finally
{
// Delete the temporary XWMA file
if (File.Exists(tempFile))
File.Delete(tempFile);
}
}