public void GenerateProgramAssociationTable()
{
ByteArray output = new ByteArray();
// sync_byte = 0x47 (8 bits)
output.Append((byte)0x47);
output.EnterBitMode();
// transport_error_indicator = '0b' (1 bit)
output.AppendBit(0);
// payload_unit_start_indicator = '1b' (1 bit)
output.AppendBit(1);
// transport_priority = '0b' (1 bit)
output.AppendBit(0);
// PID (13 bits)
output.AppendBits((ushort)0x0000, 12, 0);
// transport_scrambling_control = '00b' (2 bits)
output.AppendBits((byte)0x00, 1, 0);
// adaptation_field_control = '01b' (2 bits)
//output.appendBits((byte) 0x03, 1, 0);
output.AppendBits((byte)0x01, 1, 0);
// continuity_counter (4 bits)
output.AppendBits((byte)0x00, 3, 0);
// pointer_field
output.AppendBits((byte)0x00, 7, 0);
long packetStart = output.length;
// table_id = 0x00 (program_association_section) (8 bits)
output.AppendBits((byte)0x00, 7, 0);
// section_syntax_indicator = 1 (1 bit)
output.AppendBit(1);
// '0' (1 bit)
output.AppendBit(0);
// Reserved = '11' (2 bits)
output.AppendBits((byte)0x3, 1, 0);
// section_length (12 bits)
long sectionLengthPosition = output.length;
output.AppendBits((ushort)0x000, 11, 0);
// transport_stream_id (16 bits)
output.AppendBits(TransportStreamId, 15, 0);
// Reserved = '11' (2 bits)
output.AppendBits((byte)0x3, 1, 0);
// version_number = 0x00 (5 bits)
output.AppendBits((byte)0x00, 4, 0);
// current_next_indicator = 1 (1 bit)
output.AppendBit(1);
// section_number = 0 (8 bits)
output.AppendBits((byte)0x00, 7, 0);
// last_section_number = 0 (8 bits)
output.AppendBits((byte)0x00, 7, 0);
// Loop here for more than one program, not supported at the moment
{
// program_number (16 bits)
output.AppendBits(ProgramNumber, 15, 0);
// reserved (3 bits)
output.AppendBits((byte)7, 2, 0);
// program_map_PID (13 bits)
output.AppendBits(ProgramMapPID, 12, 0);
}
output.LeaveBitMode();
ushort sectionLength = (ushort)(output.length - sectionLengthPosition + 2);
output[sectionLengthPosition] = (byte)(output[sectionLengthPosition] | ((sectionLength >> 8) & 0xF));
output[sectionLengthPosition + 1] = (byte)(sectionLength & 0xFF);
uint crc = CRC.Calculate(output.buffer, packetStart, output.length - packetStart);
output.Append(crc);
while (output.length < 188)
{
output.Append((byte)0xFF);
}
byte [] buffer = new byte[188];
for (int i = 0; i < 188; i++)
{
buffer[i] = output.buffer[i];
}
pat = new TransportPacket(buffer);
}
public void GenerateProgramMap(ushort pid, ushort programNumber, InputStreams streams)
{
ProgramMapPID = pid;
ProgramNumber = programNumber;
ByteArray output = new ByteArray();
// sync_byte = 0x47 (8 bits)
output.Append((byte)0x47);
output.EnterBitMode();
// transport_error_indicator = '0b' (1 bit)
output.AppendBit(0);
// payload_unit_start_indicator = '1b' (1 bit)
output.AppendBit(1);
// transport_priority = '0b' (1 bit)
output.AppendBit(0);
// PID (13 bits)
output.AppendBits(pid, 12, 0);
// transport_scrambling_control = '00b' (2 bits)
output.AppendBits((byte)0x00, 1, 0);
// adaptation_field_control = '01b' (2 bits)
output.AppendBits((byte)0x01, 1, 0);
// continuity_counter (4 bits)
output.AppendBits((byte)0x00, 3, 0);
// pointer_field
output.AppendBits((byte)0x00, 7, 0);
long packetStart = output.length;
// table_id = 0x02 (8 bits)
output.AppendBits((byte)0x02, 7, 0);
// section_syntax_indicator '1' (1 bit)
output.AppendBit(1);
// '0' (1 bit)
output.AppendBit(0);
// Reserved = '11' (2 bits)
output.AppendBits((byte)0x3, 1, 0);
// section_length (calculate later) (12 bits)
long sectionLengthPosition = output.length;
output.AppendBits((ushort)0x000, 11, 0);
// program_number (16 bits)
output.AppendBits(programNumber, 15, 0);
// Reserved = '11' (2 bits)
output.AppendBits((byte)0x3, 1, 0);
// version_number = 0x0 (5 bits)
output.AppendBits((byte)0x00, 4, 0);
// current_next_indicator = 0x0 (1 bit)
output.AppendBit(1);
// section_number = 0x00 (8 bits)
output.AppendBits((byte)0x00, 7, 0);
// current_section_number = 0x00 (8 bits)
output.AppendBits((byte)0x00, 7, 0);
// Reserved = '111' (3 bits)
output.AppendBits((byte)0x7, 2, 0);
// PCR_ID (13 bits)
output.AppendBits(streams.PcrPID, 12, 0);
// Reserved = '1111' (4 bits)
output.AppendBits((byte)0xF, 3, 0);
// program_info_length = 0x00 (12 bits)
// - we ignore this field since it doesn't really matter
output.AppendBits((ushort)0x000, 11, 0);
for (long i = 0; i < streams.Count; i++)
{
streams[i].GenerateProgramMap(output);
}
output.LeaveBitMode();
ushort sectionLength = (ushort)(output.length - sectionLengthPosition + 2);
output[sectionLengthPosition] = (byte)(output[sectionLengthPosition] | ((sectionLength >> 8) & 0xF));
output[sectionLengthPosition + 1] = (byte)(sectionLength & 0xFF);
uint crc = CRC.Calculate(output.buffer, packetStart, output.length - packetStart);
output.Append(crc);
while (output.length < 188)
{
output.Append((byte)0xFF);
}
byte[] buffer = new byte[188];
for (int i = 0; i < 188; i++)
{
buffer[i] = output.buffer[i];
}
pmt = new TransportPacket(buffer);
GenerateProgramAssociationTable();
}
