private static void AddPesPacket(List <DvbSubPes> list, List <Packet> packetList)
{
int bufferSize = 0;
foreach (var p in packetList)
{
bufferSize += p.Payload.Length;
}
var pesData = new byte[bufferSize];
int pesIndex = 0;
foreach (var p in packetList)
{
Buffer.BlockCopy(p.Payload, 0, pesData, pesIndex, p.Payload.Length);
pesIndex += p.Payload.Length;
}
DvbSubPes pes;
if (VobSubParser.IsMpeg2PackHeader(pesData))
{
pes = new DvbSubPes(pesData, Mpeg2Header.Length);
}
else if (VobSubParser.IsPrivateStream1(pesData, 0))
{
pes = new DvbSubPes(pesData, 0);
}
else
{
pes = new DvbSubPes(pesData, 0);
}
list.Add(pes);
}
public static bool IsDvbSup(string fileName)
{
try
{
byte[] pesData = File.ReadAllBytes(fileName);
if (pesData[0] != 0x20 || pesData[1] != 0 || pesData[2] != 0x0F)
{
return(false);
}
var pes = new DvbSubPes(0, pesData);
return(pes.SubtitleSegments.Count > 0);
}
catch
{
return(false);
}
}
public static List <TransportStreamSubtitle> GetDvbSup(string fileName)
{
byte[] pesData = File.ReadAllBytes(fileName);
var list = new List <DvbSubPes>();
int index = 0;
while (index < pesData.Length - 10)
{
var pes = new DvbSubPes(index, pesData);
index = pes.Length + 1;
list.Add(pes);
}
var subtitles = new List <TransportStreamSubtitle>();
int seconds = 0;
for (int i = 0; i < list.Count; i++)
{
var pes = list[i];
pes.ParseSegments();
if (pes.ObjectDataList.Count > 0)
{
var sub = new TransportStreamSubtitle();
sub.StartMilliseconds = (ulong)seconds * 1000UL;
seconds += pes.PageCompositions[0].PageTimeOut;
if (pes.PageCompositions.Count > 0)
{
sub.EndMilliseconds = sub.StartMilliseconds + (ulong)pes.PageCompositions[0].PageTimeOut * 1000UL;
}
else
{
sub.EndMilliseconds = sub.StartMilliseconds + 2500;
}
sub.Pes = pes;
subtitles.Add(sub);
}
if (pes.PageCompositions.Count > 0)
{
seconds += pes.PageCompositions[0].PageTimeOut;
}
}
return(subtitles);
}
/// <summary>
/// Can be used with e.g. MemoryStream or FileStream
/// </summary>
/// <param name="ms">Input stream</param>
public void Parse(Stream ms)
{
var dataIndices = GetDataIndicesAndPesStart(ms, out var dvbPesStartIndex);
if (dvbPesStartIndex <= 0)
{
return;
}
ms.Position = 0;
foreach (var dataIndex in dataIndices)
{
ms.Seek(dvbPesStartIndex + dataIndex.Offset, SeekOrigin.Begin);
var pesData = new byte[dataIndex.Length];
var bytesRead = ms.Read(pesData, 0, pesData.Length);
if (bytesRead < pesData.Length)
{
break; // incomplete packet at end-of-file
}
DvbSubPes pes;
if (VobSubParser.IsMpeg2PackHeader(pesData))
{
pes = new DvbSubPes(pesData, Mpeg2Header.Length);
}
else if (VobSubParser.IsPrivateStream1(pesData, 0))
{
pes = new DvbSubPes(pesData, 0);
}
else
{
pes = new DvbSubPes(0, pesData);
}
pes.PresentationTimestamp = dataIndex.Pts;
_dvbSubs.Add(pes);
}
}