public EPGThread(MulticastEPGSource epg_datasource, Hashtable EPGEvents)
{
done = false;
EPG_Events = EPGEvents;
EPGParser = new Parser();
EPGParser.SectionFound += new JMS.DVB.EPG.Parser.SectionFoundHandler(SectionFound);
EPGDataSource = epg_datasource;
}
/// <summary>
/// Create a new instance and start EPG parsing on PID <i>0x12</i>.
/// </summary>
/// <param name="device">Related hardware device.</param>
/// <param name="portal">The currently show station.</param>
public ServiceParser(IDeviceProvider device, Station portal)
{
// Remember
DVBDevice = device;
Portal = portal;
// Create EPG parser
EPGParser = new Parser(DVBDevice);
// Attach handler
EPGParser.SectionFound += new Parser.SectionFoundHandler(EPGSectionFound);
}
/// <summary>
/// Initialisiert eine Instanz.
/// </summary>
protected TransportStreamAccessor()
{
// Analyseeinheit erzeugen
m_TTXConsumer = new TTXStreamConsumer( this );
// Videotext PES Analysator erzeugen
m_TTXStream = new TS.TTXStream( m_TTXConsumer, 0, false );
// Install parser
m_PATParser = new Parser();
// Register receiver
m_PATParser.SectionFound += ProcessPAT;
// Connect to parser
m_TSParser.SetFilter( 0, true, m_PATParser.OnData );
// Install EPG parser
m_EPGParser = new Parser();
// Register receiver
m_EPGParser.SectionFound += ProcessEPG;
// Connect to parser
m_TSParser.SetFilter( 0x12, true, m_EPGParser.OnData );
}
/// <summary>
/// Versucht, aus der aktuellen <i>Program Access Table</i> das Programm des
/// eingehenden Transport Streams zu ermitteln.
/// </summary>
/// <remarks>
/// Nur das erste Programm wird berücksichtigt.
/// </remarks>
/// <param name="pat">Eine SI Tabelle.</param>
private void ProcessPAT( Section pat )
{
// Not active
if (!IsRunning)
return;
// Validate
if (!pat.IsValid)
return;
// Attach to table
PAT table = pat.Table as PAT;
// Validate
if (null == table)
return;
if (!table.IsValid)
return;
if (null == table.ProgramIdentifier)
return;
// Get the first
IEnumerator<KeyValuePair<ushort, ushort>> programEnum = table.ProgramIdentifier.GetEnumerator();
if (!programEnum.MoveNext())
return;
// Compare current PMT
if (m_CurrentPMT == programEnum.Current.Value)
return;
// Remove the audio names
m_AudioNames = new string[0];
// Stop current PMT
if (0 != m_CurrentPMT)
m_TSParser.RemoveFilter( m_CurrentPMT );
// Re-create parser
m_PMTParser = new Parser();
// Connect to handler
m_PMTParser.SectionFound += ProcessPMT;
// Change
m_CurrentPMT = programEnum.Current.Value;
m_CurrentService = null;
CurrentEntry = null;
NextEntry = null;
// Create PMT
m_TSParser.SetFilter( m_CurrentPMT, true, m_PMTParser.OnData );
}
/// <summary>
/// Create a new section from a raw data buffer.
/// <seealso cref="Section"/>
/// </summary>
/// <param name="buffer">The full buffer.</param>
/// <param name="offset">The first byte of the data for the section.</param>
/// <param name="length">The number of bytes available for the section.</param>
/// <param name="parser">The related parser used for error countings.</param>
/// <returns><i>null</i> if there are not enough bytes available in
/// the raw data for the section. If a <see cref="Section"/> is reported
/// it may have <see cref="Section.IsValid"/> unset to indicated that
/// the <see cref="CRC32"/> validation failed.</returns>
static internal Section Create( byte[] buffer, int offset, int length, Parser parser )
{
// Check for the minimum size
if (length < 7)
return null;
// Decode
byte tableIdentifier = buffer[offset + 0];
byte flags = buffer[offset + 1];
int lowLength = buffer[offset + 2];
// Decode flags
bool syntax = (0 != (0x80 & flags));
int highLength = flags & 0xf;
// Construct the overall size
int size = lowLength + 256 * highLength;
// Verify
if ((3 + size) > length)
{
// Report error
if (null != parser)
parser.WrongLength += 1;
// Done
return null;
}
// See if CRC check is required
bool crcOK = true;
// Do the check - there are tables with no CRC support
if (tableIdentifier != 0x70)
if (tableIdentifier != 0x71)
crcOK = CRC32.CheckCRC( buffer, offset, 3 + size );
// Create the new section
return new Section( tableIdentifier, (byte) (flags & 0xf0), syntax, buffer, offset + 3, size, crcOK );
}
