/usr/include/liveMedia/MPEG2TransportStreamMultiplexor.hh is in liblivemedia-dev 2016.02.09-1.
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This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
This library is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
**********/
// "liveMedia"
// Copyright (c) 1996-2016 Live Networks, Inc. All rights reserved.
// A class for generating MPEG-2 Transport Stream from one or more input
// Elementary Stream data sources
// C++ header
#ifndef _MPEG2_TRANSPORT_STREAM_MULTIPLEXOR_HH
#define _MPEG2_TRANSPORT_STREAM_MULTIPLEXOR_HH
#ifndef _FRAMED_SOURCE_HH
#include "FramedSource.hh"
#endif
#ifndef _MPEG_1OR2_DEMUX_HH
#include "MPEG1or2Demux.hh" // for SCR
#endif
#define PID_TABLE_SIZE 256
class MPEG2TransportStreamMultiplexor: public FramedSource {
protected:
MPEG2TransportStreamMultiplexor(UsageEnvironment& env);
virtual ~MPEG2TransportStreamMultiplexor();
virtual void awaitNewBuffer(unsigned char* oldBuffer) = 0;
// implemented by subclasses
void handleNewBuffer(unsigned char* buffer, unsigned bufferSize,
int mpegVersion, MPEG1or2Demux::SCR scr, int16_t PID = -1);
// called by "awaitNewBuffer()"
// Note: For MPEG-4 video, set "mpegVersion" to 4; for H.264 video, set "mpegVersion" to 5.
// The buffer is assumed to be a PES packet, with a proper PES header.
// If "PID" is not -1, then it (currently, only the low 8 bits) is used as the stream's PID,
// otherwise the "stream_id" in the PES header is reused to be the stream's PID.
private:
// Redefined virtual functions:
virtual void doGetNextFrame();
private:
void deliverDataToClient(u_int8_t pid, unsigned char* buffer, unsigned bufferSize,
unsigned& startPositionInBuffer);
void deliverPATPacket();
void deliverPMTPacket(Boolean hasChanged);
void setProgramStreamMap(unsigned frameSize);
protected:
Boolean fHaveVideoStreams;
private:
unsigned fOutgoingPacketCounter;
unsigned fProgramMapVersion;
u_int8_t fPreviousInputProgramMapVersion, fCurrentInputProgramMapVersion;
// These two fields are used if we see "program_stream_map"s in the input.
struct {
unsigned counter;
u_int8_t streamType; // for use in Program Maps
} fPIDState[PID_TABLE_SIZE];
u_int8_t fPCR_PID, fCurrentPID;
// Note: We map 8-bit stream_ids directly to PIDs
MPEG1or2Demux::SCR fPCR;
unsigned char* fInputBuffer;
unsigned fInputBufferSize, fInputBufferBytesUsed;
Boolean fIsFirstAdaptationField;
};
// The CRC calculation function that Transport Streams use. We make this function public
// here in case it's useful elsewhere:
u_int32_t calculateCRC(u_int8_t const* data, unsigned dataLength, u_int32_t initialValue = 0xFFFFFFFF);
#endif
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