89 lines
3.1 KiB
C++
Executable File
89 lines
3.1 KiB
C++
Executable File
/**********
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This library is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the
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Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
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This library is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this library; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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**********/
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// "liveMedia"
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// Copyright (c) 1996-2016 Live Networks, Inc. All rights reserved.
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// A MPEG 1 or 2 Elementary Stream, demultiplexed from a Program Stream
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// Implementation
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#include "MPEG1or2DemuxedElementaryStream.hh"
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////////// MPEG1or2DemuxedElementaryStream //////////
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MPEG1or2DemuxedElementaryStream::
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MPEG1or2DemuxedElementaryStream(UsageEnvironment& env, u_int8_t streamIdTag,
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MPEG1or2Demux& sourceDemux)
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: FramedSource(env),
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fOurStreamIdTag(streamIdTag), fOurSourceDemux(sourceDemux), fMPEGversion(0) {
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// Set our MIME type string for known media types:
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if ((streamIdTag&0xE0) == 0xC0) {
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fMIMEtype = "audio/MPEG";
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} else if ((streamIdTag&0xF0) == 0xE0) {
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fMIMEtype = "video/MPEG";
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} else {
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fMIMEtype = MediaSource::MIMEtype();
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}
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}
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MPEG1or2DemuxedElementaryStream::~MPEG1or2DemuxedElementaryStream() {
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fOurSourceDemux.noteElementaryStreamDeletion(this);
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}
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void MPEG1or2DemuxedElementaryStream::doGetNextFrame() {
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fOurSourceDemux.getNextFrame(fOurStreamIdTag, fTo, fMaxSize,
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afterGettingFrame, this,
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handleClosure, this);
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}
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void MPEG1or2DemuxedElementaryStream::doStopGettingFrames() {
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fOurSourceDemux.stopGettingFrames(fOurStreamIdTag);
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}
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char const* MPEG1or2DemuxedElementaryStream::MIMEtype() const {
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return fMIMEtype;
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}
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unsigned MPEG1or2DemuxedElementaryStream::maxFrameSize() const {
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return 6+65535;
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// because the MPEG spec allows for PES packets as large as
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// (6 + 65535) bytes (header + data)
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}
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void MPEG1or2DemuxedElementaryStream
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::afterGettingFrame(void* clientData,
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unsigned frameSize, unsigned numTruncatedBytes,
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struct timeval presentationTime,
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unsigned durationInMicroseconds) {
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MPEG1or2DemuxedElementaryStream* stream
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= (MPEG1or2DemuxedElementaryStream*)clientData;
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stream->afterGettingFrame1(frameSize, numTruncatedBytes,
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presentationTime, durationInMicroseconds);
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}
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void MPEG1or2DemuxedElementaryStream
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::afterGettingFrame1(unsigned frameSize, unsigned numTruncatedBytes,
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struct timeval presentationTime,
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unsigned durationInMicroseconds) {
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fFrameSize = frameSize;
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fNumTruncatedBytes = numTruncatedBytes;
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fPresentationTime = presentationTime;
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fDurationInMicroseconds = durationInMicroseconds;
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fLastSeenSCR = fOurSourceDemux.lastSeenSCR();
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fMPEGversion = fOurSourceDemux.mpegVersion();
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FramedSource::afterGetting(this);
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}
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