private void SaveData(FileStream fs, byte[] data, int offset, int len, int id)
{
int skip = 0;
if (fs.Name.EndsWith(".wav")) // swap bytes in wav data
{
if (bs == null)
bs = new ByteSwapper(fs);
for (int i = offset + skip; i < offset + skip + len; i++)
bs.NextByte(data[i]);
}
else
fs.Write(data, offset + skip, len);
}
public ElementaryStreams ProcessVOB(IFOParse.ProgramChain pgc, string outputPath)
{
ElementaryStreams result = new ElementaryStreams();
result.AudioFile = null;
result.VideoFile = null;
List<IFOParse.VOB> vobs = pgc.Title.VOBs;
List<IFOParse.Cell> cells = pgc.Cells;
int audioOffset = 0;
int videoOffset = 0;
string audio = null;
string video = null;
try
{
byte[] buf = new byte[2048];
int totalSectors = 0;
int currentSector = 0;
// find total number of sectors for all cells
for (int cellNum = 0; cellNum < cells.Count; cellNum++)
{
IFOParse.Cell cell = cells[cellNum];
totalSectors += cell.LastSector - cell.FirstSector;
}
for (int cellNum = 0; cellNum < cells.Count; cellNum++)
{
IFOParse.Cell cell = cells[cellNum];
for (int sector = cell.FirstSector; sector <= cell.LastSector; sector++)
{
ReadSector(vobs, buf, sector);
// don't update progress every cell, otherwise it gets *really* slow
if (currentSector % 3000 == 0 && Progress != null)
Progress(currentSector, totalSectors);
currentSector++;
uint code = ReadCode(buf, 0);
if (code != BLOCK_START_CODE)
continue;
int i = 0x0e;
ulong systemCode = ReadCode(buf, i);
i += 4;
UInt16 headerLength = ReadWord(buf, i);
i += 2;
switch (systemCode)
{
case AC3_DETECT_BYTES:
#region write non-mpeg audio data to temp file
UInt16 flags = ReadWord(buf, i);
i += 2;
byte b = buf[i++];
#region find ms offset
if ((flags & 0xc000) == 0x8000 && (flags & 0xff) >= 0x80 && audioOffset == 0)
{
byte c = buf[i++];
int offset = (c & 0x0e) << 29;
offset += (ReadWord(buf, i) & 0xfffe) << 14;
i += 2;
offset += (ReadWord(buf, i) >> 1) & 0x7fff;
i += 2;
offset /= 90;
i += b - 5;
audioOffset = offset;
}
else
i += b;
#endregion
byte substream = buf[i++];
i++; // # frame headers
UInt16 pointer = ReadWord(buf, i);
i += 2;
int t = substream;
string name = t.ToString("000");
if (t >= 0xA8) // nothing
continue;
else if (t >= 0xA0) // PCM
{
// http://dvd.sourceforge.net/dvdinfo/index.html
name += ".wav";
i++; // emph, mute, reserved, frame #
byte details = buf[i++];
i++; // dynamic range;
// these seem to be zeroed out in my tests, ignore them
int bitsPerSample = (details & 0xC0) >> 6;
int sampleRate = (details & 0x30) >> 4;
int numChannels = details & 0x07;
b += 3;
}
else if (t >= 0x88) // DTS
name += ".dts"; // dts audio will be ignored (most dvds are ac3, or at least have an ac3 track)
else if (t >= 0x80) // AC3
name += ".ac3";
else
continue;
FileStream w = null;
if (writers.ContainsKey(name))
w = (FileStream)writers[name];
else
{
w = File.Create(Path.Combine(outputPath, name));
writers[name] = w;
if (name.EndsWith(".wav")) // leave room for wav header
w.Seek(44, SeekOrigin.Begin);
}
SaveData(w, buf, i, (headerLength - 7 - b), t);
#endregion
break;
case VID_DETECT_BYTES:
#region write mpeg video to temp file
flags = ReadWord(buf, i);
i += 2;
b = buf[i++];
#region find ms offset
if ((flags & 0xc000) == 0x8000 && (flags & 0xff) >= 0x80 && videoOffset == 0)
{
byte c = buf[i++];
int offset = (c & 0x0e) << 29;
offset += (ReadWord(buf, i) & 0xfffe) << 14;
i += 2;
offset += (ReadWord(buf, i) >> 1) & 0x7fff;
i += 2;
offset /= 90;
i += b - 5;
videoOffset = offset;
}
else
i += b;
#endregion
string vname = "video.m2v";
video = vname;
FileStream vw = null;
if (writers.ContainsKey(vname))
vw = (FileStream)writers[vname];
else
{
vw = File.Create(Path.Combine(outputPath, vname));
writers[vname] = vw;
}
SaveData(vw, buf, i, (headerLength - 3 - b), 1);
#endregion
break;
case AUD_DETECT_BYTES:
#region write mpeg audio to temp file
flags = ReadWord(buf, i);
i += 2;
b = buf[i++];
#region find ms offset
if ((flags & 0xc000) == 0x8000 && (flags & 0xff) >= 0x80 && audioOffset == 0)
{
byte c = buf[i++];
int offset = (c & 0x0e) << 29;
offset += (ReadWord(buf, i) & 0xfffe) << 14;
i += 2;
offset += (ReadWord(buf, i) >> 1) & 0x7fff;
i += 2;
offset /= 90;
i += b - 5;
audioOffset = offset;
}
else
i += b;
#endregion
string aname = "vob.mp2";
if (audio == null)
audio = aname;
FileStream aw = null;
if (writers.ContainsKey(aname))
aw = (FileStream)writers[aname];
else
{
aw = File.Create(Path.Combine(outputPath, aname));
writers[aname] = aw;
}
SaveData(aw, buf, i, (headerLength - 3 - b), 1);
#endregion
break;
case NAV_DETECT_BYTES:
#region find vobID and cellID
int cellID = buf[0x422];
int vobID = (buf[0x41f] << 8) + buf[0x420];
#endregion
break;
default:
break;
}
}
}
if (Progress != null)
Progress(totalSectors, totalSectors);
}
finally
{
if (bs != null)
bs.TRMSFinalize();
bs = null;
foreach (string name in writers.Keys)
{
FileStream fs = (FileStream)writers[name];
fs.Close();
if (name.EndsWith(".m2v"))
result.VideoFile = Path.Combine(outputPath, name);
else if (name.EndsWith(".ac3") || name.EndsWith(".dts") || name.EndsWith(".wav") || name.EndsWith(".mp2"))
result.AudioFile = Path.Combine(outputPath, name);
// delete anything after the first audio and video streams in the file
if (audio != null && name != video && name != audio)
File.Delete(name);
}
writers.Clear();
foreach (FileStream fs in readers.Values)
{
fs.Close();
}
readers.Clear();
}
return (result);
}
