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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 simplified version of "MPEG4VideoStreamFramer" that takes only complete, |
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| | | // discrete frames (rather than an arbitrary byte stream) as input. |
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| | | // This avoids the parsing and data copying overhead of the full |
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| | | // "MPEG4VideoStreamFramer". |
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| | | // C++ header |
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| | | |
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| | | #ifndef _MPEG4_VIDEO_STREAM_DISCRETE_FRAMER_HH |
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| | | #define _MPEG4_VIDEO_STREAM_DISCRETE_FRAMER_HH |
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| | | |
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| | | #ifndef _MPEG4_VIDEO_STREAM_FRAMER_HH |
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| | | #include "MPEG4VideoStreamFramer.hh" |
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| | | #endif |
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| | | |
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| | | class MPEG4VideoStreamDiscreteFramer: public MPEG4VideoStreamFramer { |
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| | | public: |
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| | | static MPEG4VideoStreamDiscreteFramer* |
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| | | createNew(UsageEnvironment& env, FramedSource* inputSource, Boolean leavePresentationTimesUnmodified = False); |
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| | | |
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| | | protected: |
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| | | MPEG4VideoStreamDiscreteFramer(UsageEnvironment& env, |
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| | | FramedSource* inputSource, Boolean leavePresentationTimesUnmodified); |
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| | | // called only by createNew() |
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| | | virtual ~MPEG4VideoStreamDiscreteFramer(); |
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| | | |
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| | | protected: |
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| | | // redefined virtual functions: |
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| | | virtual void doGetNextFrame(); |
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| | | |
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| | | protected: |
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| | | static void afterGettingFrame(void* clientData, unsigned frameSize, |
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| | | unsigned numTruncatedBytes, |
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| | | struct timeval presentationTime, |
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| | | unsigned durationInMicroseconds); |
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| | | void afterGettingFrame1(unsigned frameSize, |
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| | | unsigned numTruncatedBytes, |
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| | | struct timeval presentationTime, |
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| | | unsigned durationInMicroseconds); |
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| | | |
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| | | Boolean getNextFrameBit(u_int8_t& result); |
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| | | Boolean getNextFrameBits(unsigned numBits, u_int32_t& result); |
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| | | // Which are used by: |
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| | | void analyzeVOLHeader(); |
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| | | |
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| | | protected: |
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| | | Boolean fLeavePresentationTimesUnmodified; |
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| | | u_int32_t vop_time_increment_resolution; |
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| | | unsigned fNumVTIRBits; |
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| | | // # of bits needed to count to "vop_time_increment_resolution" |
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| | | struct timeval fLastNonBFramePresentationTime; |
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| | | unsigned fLastNonBFrameVop_time_increment; |
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| | | |
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| | | private: |
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| | | unsigned fNumBitsSeenSoFar; // used by the getNextFrameBit*() routines |
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| | | }; |
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| | | |
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| | | #endif |
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