public void ExtractAudio(DirectoryRecord dr, string path)
{
int sectorId = (int)dr.ExtentLocation;
int filecounter = 0;
Int32 prev1, prev2;
List <Int16> pcms = new List <Int16>();
SectorHeader sh = fs.Sectors[sectorId];
prev1 = 0;
prev2 = 0;
while ((sh.Submode & Submodes.EOF) == 0)
{
if ((sh.Submode & Submodes.Audio) > 0)
{
XASectorForm2 s = fs.ReadXA2Sector(sectorId);
for (int sg = 0; sg < 18; sg++)
{
byte[] data = new byte[128];
Array.Copy(s.Data, sg * 128, data, 0, 128);
ADPCMBlock block = new ADPCMBlock(data);
pcms.AddRange(block.getPCM(ref prev1, ref prev2));
}
if ((sh.Submode & Submodes.EOR) > 0)
{
FileStream f = new FileStream(Path.Combine(path, "track" + filecounter.ToString("00") + ".wav"), FileMode.Create);
BinaryWriter bw = new BinaryWriter(f);
bw.Write(Encoding.ASCII.GetBytes("RIFF")); // "RIFF"
bw.Write((Int32)(pcms.Count * 2) + 36); // size of entire file with 16-bit data
bw.Write(Encoding.ASCII.GetBytes("WAVE")); // "WAVE"
// chunk 1:
bw.Write(Encoding.ASCII.GetBytes("fmt ")); // "fmt "
bw.Write((Int32)16); // size of chunk in bytes
bw.Write((Int16)1); // 1 - for PCM
bw.Write((Int16)1); // only Stereo files in this version
bw.Write((Int32)44100); // sample rate per second (usually 44100)
bw.Write((Int32)(2 * 44100)); // bytes per second (usually 176400)
bw.Write((Int16)2); // data align 4 bytes (2 bytes sample stereo)
bw.Write((Int16)16); // only 16-bit in this version
// chunk 2:
bw.Write(Encoding.ASCII.GetBytes("data")); // "data"
bw.Write((Int32)(pcms.Count * 2)); // size of audio data 16-bit
foreach (Int16 pcm in pcms)
{
bw.Write(pcm);
}
bw.Flush();
bw.Close();
f.Close();
pcms = new List <Int16>();
prev1 = 0;
prev2 = 0;
filecounter++;
}
}
sectorId++;
sh = fs.Sectors[sectorId];
}
}
public XASectorForm2 ReadXA2Sector(int LBAIndex)
{
byte[] buffer = new byte[2352];
SectorHeader header = _sectors[LBAIndex];
XASectorForm2 sector = new XASectorForm2();
FileStream fs = _streams[header.FileStreamId].Item1;
fs.Seek(header.FileStreamOffset, SeekOrigin.Begin);
fs.Read(buffer, 0, 2352);
sector.ReadBytes(buffer);
return(sector);
}