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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.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**********/
// "liveMedia"
// Copyright (c) 1996-2005 Live Networks, Inc. All rights reserved.
// A MPEG 1 or 2 Elementary Stream, demultiplexed from a Program Stream
// Implementation
#include "MPEG1or2DemuxedElementaryStream.hh"
////////// MPEG1or2DemuxedElementaryStream //////////
MPEG1or2DemuxedElementaryStream::
MPEG1or2DemuxedElementaryStream(UsageEnvironment& env, u_int8_t streamIdTag,
MPEG1or2Demux& sourceDemux)
: FramedSource(env),
fOurStreamIdTag(streamIdTag), fOurSourceDemux(sourceDemux), fMPEGversion(0) {
// Set our MIME type string for known media types:
if ((streamIdTag&0xE0) == 0xC0) {
fMIMEtype = "audio/MPEG";
} else if ((streamIdTag&0xF0) == 0xE0) {
fMIMEtype = "video/MPEG";
} else {
fMIMEtype = MediaSource::MIMEtype();
}
}
MPEG1or2DemuxedElementaryStream::~MPEG1or2DemuxedElementaryStream() {
fOurSourceDemux.noteElementaryStreamDeletion(this);
}
void MPEG1or2DemuxedElementaryStream::doGetNextFrame() {
fOurSourceDemux.getNextFrame(fOurStreamIdTag, fTo, fMaxSize,
afterGettingFrame, this,
handleClosure, this);
}
void MPEG1or2DemuxedElementaryStream::doStopGettingFrames() {
fOurSourceDemux.stopGettingFrames(fOurStreamIdTag);
}
char const* MPEG1or2DemuxedElementaryStream::MIMEtype() const {
return fMIMEtype;
}
unsigned MPEG1or2DemuxedElementaryStream::maxFrameSize() const {
return 6+65535;
// because the MPEG spec allows for PES packets as large as
// (6 + 65535) bytes (header + data)
}
void MPEG1or2DemuxedElementaryStream
::afterGettingFrame(void* clientData,
unsigned frameSize, unsigned numTruncatedBytes,
struct timeval presentationTime,
unsigned durationInMicroseconds) {
MPEG1or2DemuxedElementaryStream* stream
= (MPEG1or2DemuxedElementaryStream*)clientData;
stream->afterGettingFrame1(frameSize, numTruncatedBytes,
presentationTime, durationInMicroseconds);
}
void MPEG1or2DemuxedElementaryStream
::afterGettingFrame1(unsigned frameSize, unsigned numTruncatedBytes,
struct timeval presentationTime,
unsigned durationInMicroseconds) {
fFrameSize = frameSize;
fNumTruncatedBytes = numTruncatedBytes;
fPresentationTime = presentationTime;
fDurationInMicroseconds = durationInMicroseconds;
fLastSeenSCR = fOurSourceDemux.lastSeenSCR();
fMPEGversion = fOurSourceDemux.mpegVersion();
FramedSource::afterGetting(this);
}
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