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| | | /********** |
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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 3 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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| | | |
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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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| | | |
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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) 1996-2017 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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| | | |
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| | | #ifndef _MPEG_VIDEO_STREAM_FRAMER_HH |
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| | | #define _MPEG_VIDEO_STREAM_FRAMER_HH |
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| | | |
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| | | #ifndef _FRAMED_FILTER_HH |
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| | | #include "FramedFilter.hh" |
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| | | #endif |
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| | | |
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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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| | | |
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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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| | | |
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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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| | | |
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| | | void flushInput(); // called if there is a discontinuity (seeking) in the input |
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| | | |
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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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| | | |
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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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| | | |
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| | | private: // redefined virtual functions |
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| | | virtual void doGetNextFrame(); |
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| | | virtual void doStopGettingFrames(); |
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| | | |
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| | | private: |
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| | | void reset(); |
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| | | |
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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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| | | |
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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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| | | |
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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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| | | |
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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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| | | |
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| | | #endif |
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