public List <DvbSubPes> GetSubtitlePesPackets(int packetId)
{
if (SubtitlesLookup.ContainsKey(packetId))
{
return(SubtitlesLookup[packetId]);
}
return(null);
}
private ulong?ProcessPackages(int packetId, Dictionary <int, List <int> > teletextPages, Dictionary <int, List <DvbSubPes> > teletextPesList, ulong?firstVideoMs)
{
var list = MakeSubtitlePesPackets(packetId, SubtitlePackets);
if (list.Count == 0)
{
return(firstVideoMs);
}
if (!firstVideoMs.HasValue)
{
foreach (var pes in list)
{
if (pes.PresentationTimestamp.HasValue)
{
firstVideoMs = pes.PresentationTimestampToMilliseconds();
break;
}
}
}
if (list.Any(p => p.IsDvbSubPicture) || IsM2TransportStream)
{
if (SubtitlesLookup.ContainsKey(packetId))
{
SubtitlesLookup[packetId].AddRange(list);
}
else
{
SubtitlesLookup.Add(packetId, list);
}
}
foreach (var item in list.Where(p => p.IsTeletext))
{
foreach (var pageNumber in item.PrepareTeletext().Where(p => p > 0))
{
if (!teletextPages.ContainsKey(packetId))
{
teletextPages.Add(packetId, new List <int> {
pageNumber
});
}
else
{
if (!teletextPages[packetId].Contains(pageNumber))
{
teletextPages[packetId].Add(pageNumber);
}
}
}
if (teletextPesList.ContainsKey(packetId))
{
teletextPesList[packetId].Add(item);
}
else
{
teletextPesList.Add(packetId, new List <DvbSubPes> {
item
});
}
}
return(firstVideoMs);
}
/// <summary>
/// Can be used with e.g. MemoryStream or FileStream
/// </summary>
/// <param name="ms">Input stream</param>
/// <param name="callback">Optional callback event to follow progress</param>
public void Parse(Stream ms, LoadTransportStreamCallback callback)
{
bool firstVideoPtsFound = false;
IsM2TransportStream = false;
NumberOfNullPackets = 0;
TotalNumberOfPackets = 0;
TotalNumberOfPrivateStream1 = 0;
TotalNumberOfPrivateStream1Continuation0 = 0;
SubtitlePacketIds = new List <int>();
SubtitlePackets = new List <Packet>();
ms.Position = 0;
const int packetLength = 188;
IsM2TransportStream = IsM3TransportStream(ms);
var packetBuffer = new byte[packetLength];
var m2TsTimeCodeBuffer = new byte[4];
long position = 0;
SubtitlesLookup = new Dictionary <int, List <DvbSubPes> >();
// check for Topfield .rec file
ms.Seek(position, SeekOrigin.Begin);
ms.Read(m2TsTimeCodeBuffer, 0, 3);
if (m2TsTimeCodeBuffer[0] == 0x54 && m2TsTimeCodeBuffer[1] == 0x46 && m2TsTimeCodeBuffer[2] == 0x72)
{
position = 3760;
}
long transportStreamLength = ms.Length;
while (position < transportStreamLength)
{
ms.Seek(position, SeekOrigin.Begin);
if (IsM2TransportStream)
{
ms.Read(m2TsTimeCodeBuffer, 0, m2TsTimeCodeBuffer.Length);
position += m2TsTimeCodeBuffer.Length;
}
ms.Read(packetBuffer, 0, packetLength);
byte syncByte = packetBuffer[0];
if (syncByte == Packet.SynchronizationByte)
{
var packet = new Packet(packetBuffer);
if (packet.IsNullPacket)
{
NumberOfNullPackets++;
}
else if (!firstVideoPtsFound && packet.IsVideoStream)
{
if (packet.Payload != null && packet.Payload.Length > 10)
{
int presentationTimestampDecodeTimestampFlags = packet.Payload[7] >> 6;
if (presentationTimestampDecodeTimestampFlags == Helper.B00000010 ||
presentationTimestampDecodeTimestampFlags == Helper.B00000011)
{
FirstVideoPts = (ulong)packet.Payload[9 + 4] >> 1;
FirstVideoPts += (ulong)packet.Payload[9 + 3] << 7;
FirstVideoPts += (ulong)(packet.Payload[9 + 2] & Helper.B11111110) << 14;
FirstVideoPts += (ulong)packet.Payload[9 + 1] << 22;
FirstVideoPts += (ulong)(packet.Payload[9 + 0] & Helper.B00001110) << 29;
firstVideoPtsFound = true;
}
}
}
else if (packet.IsProgramAssociationTable)
{
}
else if (packet.IsPrivateStream1 || SubtitlePacketIds.Contains(packet.PacketId))
{
TotalNumberOfPrivateStream1++;
if (!SubtitlePacketIds.Contains(packet.PacketId))
{
SubtitlePacketIds.Add(packet.PacketId);
}
if (!IsM2TransportStream && packet.PayloadUnitStartIndicator)
{
var list = MakeSubtitlePesPackets(packet.PacketId, SubtitlePackets);
bool hasImageSubtitles = false;
foreach (var item in list)
{
if (item.IsDvbSubpicture)
{
hasImageSubtitles = true;
break;
}
}
if (hasImageSubtitles)
{
if (SubtitlesLookup.ContainsKey(packet.PacketId))
{
SubtitlesLookup[packet.PacketId].AddRange(list);
}
else
{
SubtitlesLookup.Add(packet.PacketId, list);
}
}
SubtitlePackets.RemoveAll(p => p.PacketId == packet.PacketId);
}
SubtitlePackets.Add(packet);
if (packet.ContinuityCounter == 0)
{
TotalNumberOfPrivateStream1Continuation0++;
//int pesExtensionlength = 0;
//if (12 + packet.AdaptionFieldLength < packetBuffer.Length)
// pesExtensionlength = 0xFF & packetBuffer[12 + packet.AdaptionFieldLength];
//int pesOffset = 13 + packet.AdaptionFieldLength + pesExtensionlength;
//bool isTeletext = (pesExtensionlength == 0x24 && (0xFF & packetBuffer[pesOffset]) >> 4 == 1);
//// workaround uk freesat teletext
//if (!isTeletext)
// isTeletext = (pesExtensionlength == 0x24 && (0xFF & packetBuffer[pesOffset]) == 0x99);
//if (!isTeletext)
//{
//}
}
}
TotalNumberOfPackets++;
position += packetLength;
if (TotalNumberOfPackets % 100000 == 0)
{
callback.Invoke(ms.Position, transportStreamLength);
}
}
else
{
position++;
}
}
if (IsM2TransportStream)
{
DvbSubtitlesLookup = new Dictionary <int, List <TransportStreamSubtitle> >();
SubtitlesLookup = new Dictionary <int, List <DvbSubPes> >();
foreach (int pid in SubtitlePacketIds)
{
var bdMs = new MemoryStream();
var list = MakeSubtitlePesPackets(pid, SubtitlePackets);
var currentList = new List <DvbSubPes>();
var sb = new StringBuilder();
var subList = new List <TransportStreamSubtitle>();
for (var index = 0; index < list.Count; index++)
{
var item = list[index];
item.WriteToStream(bdMs);
currentList.Add(item);
if (item.DataIdentifier == 0x80)
{
bdMs.Position = 0;
var bdList = BluRaySupParser.ParseBluRaySup(bdMs, sb, true);
if (bdList.Count > 0)
{
var startMs = currentList.First().PresentationTimestampToMilliseconds();
var endMs = index + 1 < list.Count ? list[index + 1].PresentationTimestampToMilliseconds() : startMs + (ulong)Configuration.Settings.General.NewEmptyDefaultMs;
subList.Add(new TransportStreamSubtitle(bdList[0], startMs, endMs, (ulong)(FirstVideoPts / 90.0)));
}
bdMs = new MemoryStream();
currentList.Clear();
}
}
SubtitlesLookup.Add(pid, list);
DvbSubtitlesLookup.Add(pid, subList);
}
SubtitlePacketIds.Clear();
foreach (int key in DvbSubtitlesLookup.Keys)
{
SubtitlePacketIds.Add(key);
}
SubtitlePacketIds.Sort();
return;
}
// check for SubPictureStreamId = 32
foreach (int pid in SubtitlePacketIds)
{
var list = MakeSubtitlePesPackets(pid, SubtitlePackets);
bool hasImageSubtitles = false;
foreach (var item in list)
{
if (item.IsDvbSubpicture)
{
hasImageSubtitles = true;
break;
}
}
if (hasImageSubtitles)
{
if (SubtitlesLookup.ContainsKey(pid))
{
SubtitlesLookup[pid].AddRange(list);
}
else
{
SubtitlesLookup.Add(pid, list);
}
}
SubtitlePackets.RemoveAll(p => p.PacketId == pid);
}
SubtitlePacketIds.Clear();
foreach (int key in SubtitlesLookup.Keys)
{
SubtitlePacketIds.Add(key);
}
SubtitlePacketIds.Sort();
// Merge packets and set start/end time
DvbSubtitlesLookup = new Dictionary <int, List <TransportStreamSubtitle> >();
var firstVideoMs = (ulong)(FirstVideoPts / 90.0);
foreach (int pid in SubtitlePacketIds)
{
var subtitles = new List <TransportStreamSubtitle>();
var list = ParseAndRemoveEmpty(GetSubtitlePesPackets(pid));
for (int i = 0; i < list.Count; i++)
{
var pes = list[i];
pes.ParseSegments();
if (pes.ObjectDataList.Count > 0)
{
var sub = new TransportStreamSubtitle {
StartMilliseconds = pes.PresentationTimestampToMilliseconds(), Pes = pes
};
if (i + 1 < list.Count && list[i + 1].PresentationTimestampToMilliseconds() > 25)
{
sub.EndMilliseconds = list[i + 1].PresentationTimestampToMilliseconds() - 25;
}
if (sub.EndMilliseconds < sub.StartMilliseconds || sub.EndMilliseconds - sub.StartMilliseconds > (ulong)Configuration.Settings.General.SubtitleMaximumDisplayMilliseconds)
{
sub.EndMilliseconds = sub.StartMilliseconds + (ulong)Configuration.Settings.General.SubtitleMaximumDisplayMilliseconds;
}
subtitles.Add(sub);
if (sub.StartMilliseconds < firstVideoMs)
{
firstVideoMs = sub.StartMilliseconds;
}
}
}
foreach (var s in subtitles)
{
s.OffsetMilliseconds = firstVideoMs;
}
DvbSubtitlesLookup.Add(pid, subtitles);
}
SubtitlePacketIds.Clear();
foreach (int key in DvbSubtitlesLookup.Keys)
{
if (DvbSubtitlesLookup[key].Count > 0)
{
SubtitlePacketIds.Add(key);
}
}
SubtitlePacketIds.Sort();
}
