/// <summary>
/// Demultiplex multiplexed packs together each streamId at a time + removing bad packs + fixing displaytimes
/// </summary>
/// <returns>List of complete packs each with a complete sub image</returns>
public List <VobSubMergedPack> MergeVobSubPacks()
{
var list = new List <VobSubMergedPack>();
var pts = new TimeSpan();
var ms = new MemoryStream();
int streamId = 0;
bool continuation = false;
float ticksPerMillisecond = 90.000F;
//if (!IsPal)
// ticksPerMillisecond = 90.090F; TODO; What should this be for NTSC?
// get unique streamIds
var uniqueStreamIds = new List <int>();
foreach (var p in VobSubPacks)
{
if (p.PacketizedElementaryStream != null &&
p.PacketizedElementaryStream.SubPictureStreamId.HasValue &&
!uniqueStreamIds.Contains(p.PacketizedElementaryStream.SubPictureStreamId.Value))
{
uniqueStreamIds.Add(p.PacketizedElementaryStream.SubPictureStreamId.Value);
}
}
IdxParagraph lastIdxParagraph = null;
foreach (int uniqueStreamId in uniqueStreamIds) // packets must be merged in streamId order (so they don't get mixed)
{
foreach (var p in VobSubPacks)
{
if (p.PacketizedElementaryStream != null && p.PacketizedElementaryStream.SubPictureStreamId.HasValue &&
p.PacketizedElementaryStream.SubPictureStreamId.Value == uniqueStreamId)
{
if (!continuation)
{
if (ms.Length > 0)
{
list.Add(new VobSubMergedPack(ms.ToArray(), pts, streamId, lastIdxParagraph));
}
ms = new MemoryStream();
pts =
TimeSpan.FromMilliseconds(
Convert.ToDouble(p.PacketizedElementaryStream.PresentationTimeStamp /
ticksPerMillisecond)); //90000F * 1000)); (PAL)
streamId = p.PacketizedElementaryStream.SubPictureStreamId.Value;
}
lastIdxParagraph = p.IdxLine;
continuation = p.PacketizedElementaryStream.Length == PacketizedElementaryStreamMaximumLength;
ms.Write(p.PacketizedElementaryStream.DataBuffer, 0,
p.PacketizedElementaryStream.DataBuffer.Length);
}
}
if (ms.Length > 0)
{
list.Add(new VobSubMergedPack(ms.ToArray(), pts, streamId, lastIdxParagraph));
ms = new MemoryStream();
}
}
// Remove any bad packs
for (int i = list.Count - 1; i >= 0; i--)
{
VobSubMergedPack pack = list[i];
if (pack.SubPicture == null || pack.SubPicture.ImageDisplayArea.Width <= 3 || pack.SubPicture.ImageDisplayArea.Height <= 2)
{
list.RemoveAt(i);
}
}
// Fix subs with no duration (completely normal) or negative duration or duration > 10 seconds
for (int i = 0; i < list.Count; i++)
{
VobSubMergedPack pack = list[i];
if (pack.SubPicture.Delay.TotalMilliseconds > 0)
{
pack.EndTime = pack.StartTime.Add(pack.SubPicture.Delay);
}
if (pack.EndTime < pack.StartTime || pack.EndTime.TotalSeconds - pack.StartTime.TotalSeconds > 10.0)
{
if (i + 1 < list.Count)
{
pack.EndTime = TimeSpan.FromMilliseconds(list[i].StartTime.TotalMilliseconds - 100);
}
else
{
pack.EndTime = TimeSpan.FromMilliseconds(pack.StartTime.TotalMilliseconds + 3000);
}
}
}
return(list);
}
