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| | | /********** |
| | | 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) 1996-2017 Live Networks, Inc. All rights reserved. |
| | | // A filter that breaks up a H.264 or H.265 Video Elementary Stream into NAL units. |
| | | // C++ header |
| | | |
| | | #ifndef _H264_OR_5_VIDEO_STREAM_FRAMER_HH |
| | | #define _H264_OR_5_VIDEO_STREAM_FRAMER_HH |
| | | |
| | | #ifndef _MPEG_VIDEO_STREAM_FRAMER_HH |
| | | #include "MPEGVideoStreamFramer.hh" |
| | | #endif |
| | | |
| | | class H264or5VideoStreamFramer: public MPEGVideoStreamFramer { |
| | | public: |
| | | void getVPSandSPSandPPS(u_int8_t*& vps, unsigned& vpsSize, |
| | | u_int8_t*& sps, unsigned& spsSize, |
| | | u_int8_t*& pps, unsigned& ppsSize) const { |
| | | // Returns pointers to copies of the most recently seen VPS (video parameter set) |
| | | // SPS (sequence parameter set) and PPS (picture parameter set) NAL units. |
| | | // (NULL pointers are returned if the NAL units have not yet been seen.) |
| | | vps = fLastSeenVPS; vpsSize = fLastSeenVPSSize; |
| | | sps = fLastSeenSPS; spsSize = fLastSeenSPSSize; |
| | | pps = fLastSeenPPS; ppsSize = fLastSeenPPSSize; |
| | | } |
| | | |
| | | void setVPSandSPSandPPS(u_int8_t* vps, unsigned vpsSize, |
| | | u_int8_t* sps, unsigned spsSize, |
| | | u_int8_t* pps, unsigned ppsSize) { |
| | | // Assigns copies of the VPS, SPS and PPS NAL units. If this function is not called, |
| | | // then these NAL units are assigned only if/when they appear in the input stream. |
| | | saveCopyOfVPS(vps, vpsSize); |
| | | saveCopyOfSPS(sps, spsSize); |
| | | saveCopyOfPPS(pps, ppsSize); |
| | | } |
| | | |
| | | protected: |
| | | H264or5VideoStreamFramer(int hNumber, // 264 or 265 |
| | | UsageEnvironment& env, FramedSource* inputSource, |
| | | Boolean createParser, Boolean includeStartCodeInOutput); |
| | | // We're an abstract base class. |
| | | virtual ~H264or5VideoStreamFramer(); |
| | | |
| | | void saveCopyOfVPS(u_int8_t* from, unsigned size); |
| | | void saveCopyOfSPS(u_int8_t* from, unsigned size); |
| | | void saveCopyOfPPS(u_int8_t* from, unsigned size); |
| | | |
| | | void setPresentationTime() { fPresentationTime = fNextPresentationTime; } |
| | | |
| | | Boolean isVPS(u_int8_t nal_unit_type); |
| | | Boolean isSPS(u_int8_t nal_unit_type); |
| | | Boolean isPPS(u_int8_t nal_unit_type); |
| | | Boolean isVCL(u_int8_t nal_unit_type); |
| | | |
| | | protected: |
| | | int fHNumber; |
| | | u_int8_t* fLastSeenVPS; |
| | | unsigned fLastSeenVPSSize; |
| | | u_int8_t* fLastSeenSPS; |
| | | unsigned fLastSeenSPSSize; |
| | | u_int8_t* fLastSeenPPS; |
| | | unsigned fLastSeenPPSSize; |
| | | struct timeval fNextPresentationTime; // the presentation time to be used for the next NAL unit to be parsed/delivered after this |
| | | friend class H264or5VideoStreamParser; // hack |
| | | }; |
| | | |
| | | // A general routine for making a copy of a (H.264 or H.265) NAL unit, |
| | | // removing 'emulation' bytes from the copy: |
| | | unsigned removeH264or5EmulationBytes(u_int8_t* to, unsigned toMaxSize, |
| | | u_int8_t const* from, unsigned fromSize); |
| | | // returns the size of the copy; it will be <= min(toMaxSize,fromSize) |
| | | |
| | | #endif |