| /********** |
| 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 3 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., |
| 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| **********/ |
| // "liveMedia" |
| // Copyright (c) 1996-2020 Live Networks, Inc. All rights reserved. |
| // A filter that breaks up an MPEG video elementary stream into |
| // headers and frames |
| // C++ header |
| |
| #ifndef _MPEG_VIDEO_STREAM_FRAMER_HH |
| #define _MPEG_VIDEO_STREAM_FRAMER_HH |
| |
| #ifndef _FRAMED_FILTER_HH |
| #include "FramedFilter.hh" |
| #endif |
| |
| class TimeCode { |
| public: |
| TimeCode(); |
| virtual ~TimeCode(); |
| |
| int operator==(TimeCode const& arg2); |
| unsigned days, hours, minutes, seconds, pictures; |
| }; |
| |
| class MPEGVideoStreamFramer: public FramedFilter { |
| public: |
| Boolean& pictureEndMarker() { return fPictureEndMarker; } |
| // a hack for implementing the RTP 'M' bit |
| |
| void flushInput(); // called if there is a discontinuity (seeking) in the input |
| |
| protected: |
| MPEGVideoStreamFramer(UsageEnvironment& env, FramedSource* inputSource); |
| // we're an abstract base class |
| virtual ~MPEGVideoStreamFramer(); |
| |
| void computePresentationTime(unsigned numAdditionalPictures); |
| // sets "fPresentationTime" |
| void setTimeCode(unsigned hours, unsigned minutes, unsigned seconds, |
| unsigned pictures, unsigned picturesSinceLastGOP); |
| |
| protected: // redefined virtual functions |
| virtual void doGetNextFrame(); |
| virtual void doStopGettingFrames(); |
| |
| private: |
| void reset(); |
| |
| static void continueReadProcessing(void* clientData, |
| unsigned char* ptr, unsigned size, |
| struct timeval presentationTime); |
| void continueReadProcessing(); |
| |
| protected: |
| double fFrameRate; // Note: For MPEG-4, this is really a 'tick rate' |
| unsigned fPictureCount; // hack used to implement doGetNextFrame() |
| Boolean fPictureEndMarker; |
| struct timeval fPresentationTimeBase; |
| |
| // parsing state |
| class MPEGVideoStreamParser* fParser; |
| friend class MPEGVideoStreamParser; // hack |
| |
| private: |
| TimeCode fCurGOPTimeCode, fPrevGOPTimeCode; |
| unsigned fPicturesAdjustment; |
| double fPictureTimeBase; |
| unsigned fTcSecsBase; |
| Boolean fHaveSeenFirstTimeCode; |
| }; |
| |
| #endif |