85 lines
2.6 KiB
C++
Executable File
85 lines
2.6 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) 1996-2015 Live Networks, Inc. All rights reserved.
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// A filter that breaks up an MPEG video elementary stream into
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// headers and frames
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// C++ header
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#ifndef _MPEG_VIDEO_STREAM_FRAMER_HH
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#define _MPEG_VIDEO_STREAM_FRAMER_HH
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#ifndef _FRAMED_FILTER_HH
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#include "FramedFilter.hh"
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#endif
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class TimeCode {
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public:
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TimeCode();
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virtual ~TimeCode();
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int operator==(TimeCode const& arg2);
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unsigned days, hours, minutes, seconds, pictures;
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};
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class MPEGVideoStreamFramer: public FramedFilter {
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public:
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Boolean& pictureEndMarker() { return fPictureEndMarker; }
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// a hack for implementing the RTP 'M' bit
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void flushInput(); // called if there is a discontinuity (seeking) in the input
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protected:
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MPEGVideoStreamFramer(UsageEnvironment& env, FramedSource* inputSource);
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// we're an abstract base class
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virtual ~MPEGVideoStreamFramer();
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void computePresentationTime(unsigned numAdditionalPictures);
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// sets "fPresentationTime"
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void setTimeCode(unsigned hours, unsigned minutes, unsigned seconds,
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unsigned pictures, unsigned picturesSinceLastGOP);
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private: // redefined virtual functions
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virtual void doGetNextFrame();
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private:
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void reset();
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static void continueReadProcessing(void* clientData,
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unsigned char* ptr, unsigned size,
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struct timeval presentationTime);
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void continueReadProcessing();
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protected:
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double fFrameRate; // Note: For MPEG-4, this is really a 'tick rate'
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unsigned fPictureCount; // hack used to implement doGetNextFrame()
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Boolean fPictureEndMarker;
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struct timeval fPresentationTimeBase;
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// parsing state
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class MPEGVideoStreamParser* fParser;
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friend class MPEGVideoStreamParser; // hack
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private:
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TimeCode fCurGOPTimeCode, fPrevGOPTimeCode;
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unsigned fPicturesAdjustment;
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double fPictureTimeBase;
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unsigned fTcSecsBase;
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Boolean fHaveSeenFirstTimeCode;
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};
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#endif
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