private void RipSubtitles(string vobFileName, MemoryStream stream, int vobNumber)
{
long firstNavStartPts = 0;
using (var fs = RetryOpenRead(vobFileName))
{
var buffer = new byte[0x800];
long position = 0;
progressBarRip.Maximum = 100;
progressBarRip.Value = 0;
int lba = 0;
long length = fs.Length;
while (position < length && !_abort)
{
int bytesRead = 0;
// Reading and test for IO errors... and allow abort/retry/ignore
var tryAgain = true;
while (tryAgain && position < length)
{
tryAgain = false;
try
{
fs.Seek(position, SeekOrigin.Begin);
bytesRead = fs.Read(buffer, 0, 0x800);
}
catch (IOException exception)
{
var result = MessageBox.Show(string.Format("An error occured while reading file: {0}", exception.Message), "", MessageBoxButtons.AbortRetryIgnore);
if (result == DialogResult.Abort)
{
return;
}
if (result == DialogResult.Retry)
{
tryAgain = true;
}
if (result == DialogResult.Ignore)
{
position += 0x800;
tryAgain = true;
}
}
}
if (VobSubParser.IsMpeg2PackHeader(buffer))
{
var vsp = new VobSubPack(buffer, null);
if (IsSubtitlePack(buffer))
{
if (vsp.PacketizedElementaryStream.PresentationTimestamp.HasValue && _accumulatedPresentationTimestamp != 0)
{
UpdatePresentationTimestamp(buffer, _accumulatedPresentationTimestamp, vsp);
}
stream.Write(buffer, 0, 0x800);
if (bytesRead < 0x800)
{
stream.Write(Encoding.ASCII.GetBytes(new string(' ', 0x800 - bytesRead)), 0, 0x800 - bytesRead);
}
}
else if (IsPrivateStream2(buffer, 0x26))
{
if (Helper.GetEndian(buffer, 0x0026, 4) == 0x1bf && Helper.GetEndian(buffer, 0x0400, 4) == 0x1bf)
{
uint vobuSPtm = Helper.GetEndian(buffer, 0x0039, 4);
uint vobuEPtm = Helper.GetEndian(buffer, 0x003d, 4);
_lastPresentationTimestamp = vobuEPtm;
if (firstNavStartPts == 0)
{
firstNavStartPts = vobuSPtm;
if (vobNumber == 0)
{
_accumulatedPresentationTimestamp = -vobuSPtm;
}
}
if (vobuSPtm + firstNavStartPts + _accumulatedPresentationTimestamp < _lastVobPresentationTimestamp)
{
_accumulatedPresentationTimestamp += _lastNavEndPts - vobuSPtm;
}
else if (_lastNavEndPts > vobuEPtm)
{
_accumulatedPresentationTimestamp += _lastNavEndPts - vobuSPtm;
}
_lastNavEndPts = vobuEPtm;
}
}
}
position += 0x800;
var progress = (int)((position * 100) / length);
if (progress != progressBarRip.Value)
{
progressBarRip.Value = progress;
TaskbarList.SetProgressValue(_taskbarFormHandle, (vobNumber * 100) + progressBarRip.Value, progressBarRip.Maximum * listBoxVobFiles.Items.Count);
Application.DoEvents();
}
lba++;
}
}
_lastVobPresentationTimestamp = _lastPresentationTimestamp;
}
/// <summary>
/// Write the 5 PTS bytes to buffer
/// </summary>
private static void UpdatePresentationTimestamp(byte[] buffer, long addPresentationTimestamp, VobSubPack vsp)
{
const int presentationTimestampIndex = 23;
long newPts = addPresentationTimestamp + ((long)vsp.PacketizedElementaryStream.PresentationTimestamp.Value);
var buffer5B = BitConverter.GetBytes((UInt64)newPts);
if (BitConverter.IsLittleEndian)
{
buffer[presentationTimestampIndex + 4] = (byte)(buffer5B[0] << 1 | 0b00000001); // last 7 bits + '1'
buffer[presentationTimestampIndex + 3] = (byte)((buffer5B[0] >> 7) + (buffer5B[1] << 1)); // the next 8 bits (1 from last byte, 7 from next)
buffer[presentationTimestampIndex + 2] = (byte)((buffer5B[1] >> 6 | 0b00000001) + (buffer5B[2] << 2)); // the next 7 bits (1 from 2nd last byte, 6 from 3rd last byte)
buffer[presentationTimestampIndex + 1] = (byte)((buffer5B[2] >> 6) + (buffer5B[3] << 2)); // the next 8 bits (2 from 3rd last byte, 6 from 2rd last byte)
buffer[presentationTimestampIndex] = (byte)((buffer5B[3] >> 6 | 0b00000001) + (buffer5B[4] << 2));
}
else
{
buffer[presentationTimestampIndex + 4] = (byte)(buffer5B[7] << 1 | 0b00000001); // last 7 bits + '1'
buffer[presentationTimestampIndex + 3] = (byte)((buffer5B[7] >> 7) + (buffer5B[6] << 1)); // the next 8 bits (1 from last byte, 7 from next)
buffer[presentationTimestampIndex + 2] = (byte)((buffer5B[6] >> 6 | 0b00000001) + (buffer5B[5] << 2)); // the next 7 bits (1 from 2nd last byte, 6 from 3rd last byte)
buffer[presentationTimestampIndex + 1] = (byte)((buffer5B[5] >> 6) + (buffer5B[4] << 2)); // the next 8 bits (2 from 3rd last byte, 6 from 2rd last byte)
buffer[presentationTimestampIndex] = (byte)((buffer5B[4] >> 6 | 0b00000001) + (buffer5B[3] << 2));
}
if (vsp.PacketizedElementaryStream.PresentationTimestampDecodeTimestampFlags == 0b00000010)
{
buffer[presentationTimestampIndex] += 0b00100000;
}
else
{
buffer[presentationTimestampIndex] += 0b00110000;
}
}
private void RipSubtitles(string vobFileName, MemoryStream stream, int vobNumber)
{
long firstNavStartPTS = 0;
FileStream fs = null;
bool tryAgain = true;
while (tryAgain)
{
try
{
fs = new FileStream(vobFileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
tryAgain = false;
}
catch (IOException exception)
{
var result = MessageBox.Show(string.Format("An error occured while opening file: {0}", exception.Message), "", MessageBoxButtons.RetryCancel);
if (result == DialogResult.Cancel)
{
return;
}
if (result == DialogResult.Retry)
{
tryAgain = true;
}
}
}
byte[] buffer = new byte[0x800];
long position = 0;
progressBarRip.Maximum = 100;
progressBarRip.Value = 0;
int lba = 0;
long length = fs.Length;
while (position < length && !_abort)
{
int bytesRead = 0;
// Reading and test for IO errors... and allow abort/retry/ignore
tryAgain = true;
while (tryAgain && position < length)
{
tryAgain = false;
try
{
fs.Seek(position, SeekOrigin.Begin);
bytesRead = fs.Read(buffer, 0, 0x0800);
}
catch (IOException exception)
{
var result = MessageBox.Show(string.Format("An error occured while reading file: {0}", exception.Message), "", MessageBoxButtons.AbortRetryIgnore);
if (result == DialogResult.Abort)
{
return;
}
if (result == DialogResult.Retry)
{
tryAgain = true;
}
if (result == DialogResult.Ignore)
{
position += 0x800;
tryAgain = true;
}
}
}
if (VobSubParser.IsMpeg2PackHeader(buffer))
{
VobSubPack vsp = new VobSubPack(buffer, null);
if (IsSubtitlePack(buffer))
{
if (vsp.PacketizedElementaryStream.PresentationTimeStamp.HasValue && _accumulatedPresentationTimeStamp != 0)
{
UpdatePresentationTimeStamp(buffer, _accumulatedPresentationTimeStamp, vsp);
}
stream.Write(buffer, 0, 0x800);
if (bytesRead < 0x800)
{
stream.Write(Encoding.ASCII.GetBytes(new string(' ', 0x800 - bytesRead)), 0, 0x800 - bytesRead);
}
}
else if (IsPrivateStream2(buffer, 0x26))
{
if (Helper.GetEndian(buffer, 0x0026, 4) == 0x1bf && Helper.GetEndian(buffer, 0x400, 4) == 0x1bf)
{
uint vobu_s_ptm = Helper.GetEndian(buffer, 0x0039, 4);
uint vobu_e_ptm = Helper.GetEndian(buffer, 0x003d, 4);
_lastPresentationTimeStamp = vobu_e_ptm;
if (firstNavStartPTS == 0)
{
firstNavStartPTS = vobu_s_ptm;
if (vobNumber == 0)
{
_accumulatedPresentationTimeStamp = -vobu_s_ptm;
}
}
if (vobu_s_ptm + firstNavStartPTS + _accumulatedPresentationTimeStamp < _lastVobPresentationTimeStamp)
{
_accumulatedPresentationTimeStamp += _lastNavEndPts - vobu_s_ptm;
}
else if (_lastNavEndPts > vobu_e_ptm)
{
_accumulatedPresentationTimeStamp += _lastNavEndPts - vobu_s_ptm;
}
_lastNavEndPts = vobu_e_ptm;
}
}
}
position += 0x800;
progressBarRip.Value = (int)((position * 100) / length);
Application.DoEvents();
lba++;
}
fs.Close();
_lastVobPresentationTimeStamp = _lastPresentationTimeStamp;
}