public void Append(TransportPackets packets)
{
while (packets.Count > 0)
{
packetList.Add(packets.TakeFirst());
Count++;
}
}
public TransportPackets Packetize(long initialPTS, ushort PID, ref int ContinuityCounter)
{
if (GeneratePTSPacket)
{
TransportPackets result = new TransportPackets();
result.AddPacket(GeneratePTSPadding(initialPTS, PID, ref ContinuityCounter));
return(result);
}
else
{
return(PacketizeFile(initialPTS, PID, ref ContinuityCounter));
}
}
public TransportPackets ReadMorePackets(long InitialPTS, ushort PID)
{
TransportPackets result = new TransportPackets();
if (Count == 0)
{
return(result);
}
result.Append(this[0].Packetize(InitialPTS, PID, ref ContinuityCounter));
RemoveAt(0);
return(result);
}
private void BufferMore()
{
if (Packets.Count == 0)
{
Packets = SubtitleItems.RegionList.ReadMorePackets(InitialPtsInt, PID);
/*if (SubtitleItems.Count > 0 && SubtitleItems[0] != null)
* {
* SubtitleItem item = SubtitleItems[0];
* SubtitleItems.RemoveAt(0);
*
* while (lastPresentationTime > 0 && (item.PresentationTime - lastPresentationTime) >= 650)
* {
* lastPresentationTime += 650;
* packetizePadding(lastPresentationTime);
* }
*
* packetizeFile(item.fileName, item.PresentationTime);
* lastPresentationTime = item.PresentationTime;
* }*/
}
}
private TransportPackets PacketizeFile(long InitialPTS, ushort PID, ref int ContinuityCounter)
{
TransportPackets result = new TransportPackets();
FileStream inputFileStream = new FileStream(SourceFile, FileMode.Open, FileAccess.Read);
BigEndianReader reader = new BigEndianReader(inputFileStream);
long timeStamp = PresentationTimeStamp + InitialPTS;
long bytesRemaining = ItemLength;
int i = 0;
while (bytesRemaining > 0)
{
long stuffingBytes = 0;
int headerSize = (i == 0) ? 18 : 4;
if (bytesRemaining < 188 - headerSize)
{
stuffingBytes = 188 - headerSize - bytesRemaining;
}
ByteArray transportData = new ByteArray();
transportData.MaxSize = 188;
//------------------------------
// Transport Packet Header
//------------------------------
// sync_byte = 0x47 (8 bits)
transportData.Append((byte)0x47);
transportData.EnterBitMode();
// transport_error_indicator (1 bit)
transportData.AppendBit(0);
// payload_unit_start_indicator (1 bit)
transportData.AppendBit((byte)((i == 0) ? 1 : 0));
// transport_priority (1 bit)
transportData.AppendBit(0);
// PID (13 bits)
transportData.AppendBits(PID, 12, 0);
// transport_scrambling_code (2 bits)
transportData.AppendBits((byte)0x0, 1, 0);
// adaptation_field_control (2 bits)
transportData.AppendBits((byte)((stuffingBytes > 0) ? 0x3 : 0x1), 1, 0);
// continuity_counter (4 bits)
transportData.AppendBits(ContinuityCounter, 3, 0);
ContinuityCounter++;
transportData.LeaveBitMode();
long used = 4;
if (stuffingBytes > 0)
{
// Adaptation field for stuffing
stuffingBytes--;
used++;
transportData.Append((byte)stuffingBytes);
if (stuffingBytes > 0)
{
used += stuffingBytes;
stuffingBytes--;
transportData.Append((byte)0x00); // flags field
for (int k = 0; k < stuffingBytes; k++)
{
transportData.Append((byte)0xFF); // stuffing byte
}
}
//else
// throw new Exception("Adaptation Field length = 0");
}
if (i == 0)
{
//-------------------------------
// PES Packet Header
//-------------------------------
// packet_start_code_prefix (24 bits) (24)
// stream_id (8 bits) (32)
transportData.Append((uint)0x000001BD);
long packetLengthPosition = transportData.length;
ushort packetLength = (ushort)(ItemLength + 8);
// Fill with dummy value
transportData.Append(packetLength);
// '10' (2 bits) (02) 0x8000
// PES_scrambling_code (2 bits) (04) 0x0000
// PES_priority (1 bit) (05) 0x0000
// data_alignment_indicator (1 bit) (06) 0x0400
// copyright (1 bit) (07) 0x0000
// original_or_copy (1 bit) (08) 0x0000
// PTS_DTS_flags = '10' (2 bits) (10) 0x0080
// ESCR_flag (1 bit) (11) 0x0000
// ES_rate_flag (1 bit) (12) 0x0000
// DSM_trick_mode_flag (1 bit) (13) 0x0000
// additional_copy_info (1 bit) (14) 0x0000
// PES_CRC_flag (1 bit) (15) 0x0000
// PES_extension_flag (1 bit) (16) 0x0000
// 0x8480
transportData.Append((ushort)0x8480);
// PES_header_data_length = 0x05 (8 bits) (08)
transportData.Append((byte)0x05);
// '0010' (4 bits) (76)
// PTS[32..30] (3 bits) (79)
// marker_bit (1 bit) (80)
// PTS[29..15] (15 bits) (95)
// marker_bit (1 bit) (96)
// PTS[14..0] (15 bits) (111)
// marker_bit (1 bit) (112)
transportData.EnterBitMode();
transportData.AppendBits((byte)0x2, 3, 0);
transportData.AppendBits(timeStamp, 32, 30);
transportData.AppendBit(1);
transportData.AppendBits(timeStamp, 29, 15);
transportData.AppendBit(1);
transportData.AppendBits(timeStamp, 14, 0);
transportData.AppendBit(1);
transportData.LeaveBitMode();
used += 14;
}
int payloadLength = TimelineRegionList.PacketSize - (int)used;
bytesRemaining -= payloadLength;
for (int k = 0; k < payloadLength; k++)
{
transportData.Append((byte)reader.ReadByte());
}
long bytesIntoStream = ((PacketStart - 1) + i) * TimelineRegionList.PacketSize * 27000000 / TimelineRegionList.ByteRate;
long streamTime = bytesIntoStream + (InitialPTS * 300);
TransportPacket newPacket = new TransportPacket(transportData.buffer);
newPacket.StreamTime = (ulong)streamTime;
newPacket.DecoderStamp = (ulong)timeStamp * 300;
newPacket.PID = PID;
if (newPacket.StreamTime >= newPacket.DecoderStamp)
{
throw new Exception("Packet is scheduled for delivery after decoder time");
}
result.AddPacket(newPacket);
i++;
}
reader.Close();
inputFileStream.Close();
return(result);
}
