mpegvideostreamparser.cpp

流媒体传输协议的实现代码,非常有用.可以支持rtsp mms等流媒体传输协议

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FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
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// "liveMedia"
// Copyright (c) 1996-2004 Live Networks, Inc.  All rights reserved.
// An abstract parser for MPEG video streams
// Implementation

#include "MPEGVideoStreamParser.hh"

MPEGVideoStreamParser
::MPEGVideoStreamParser(MPEGVideoStreamFramer* usingSource,
			FramedSource* inputSource)
  : StreamParser(inputSource, FramedSource::handleClosure, usingSource,
		 &MPEGVideoStreamFramer::continueReadProcessing, usingSource),
  fUsingSource(usingSource) {
}

MPEGVideoStreamParser::~MPEGVideoStreamParser() {
}

void MPEGVideoStreamParser::restoreSavedParserState() {
  StreamParser::restoreSavedParserState();
  fTo = fSavedTo;
  fNumTruncatedBytes = fSavedNumTruncatedBytes;
}

void MPEGVideoStreamParser::setParseState() {
  fSavedTo = fTo;
  fSavedNumTruncatedBytes = fNumTruncatedBytes;
  saveParserState();
}

void MPEGVideoStreamParser::registerReadInterest(unsigned char* to,
						 unsigned maxSize) {
  fStartOfFrame = fTo = fSavedTo = to;
  fLimit = to + maxSize;
  fNumTruncatedBytes = fSavedNumTruncatedBytes = 0;
}