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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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| | | // RTP sink for MPEG video (RFC 2250) |
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| | | // C++ header |
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| | | |
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| | | #ifndef _MPEG_1OR2_VIDEO_RTP_SINK_HH |
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| | | #define _MPEG_1OR2_VIDEO_RTP_SINK_HH |
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| | | |
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| | | #ifndef _VIDEO_RTP_SINK_HH |
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| | | #include "VideoRTPSink.hh" |
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| | | #endif |
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| | | |
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| | | class MPEG1or2VideoRTPSink: public VideoRTPSink { |
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| | | public: |
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| | | static MPEG1or2VideoRTPSink* createNew(UsageEnvironment& env, Groupsock* RTPgs); |
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| | | |
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| | | protected: |
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| | | MPEG1or2VideoRTPSink(UsageEnvironment& env, Groupsock* RTPgs); |
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| | | // called only by createNew() |
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| | | |
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| | | virtual ~MPEG1or2VideoRTPSink(); |
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| | | |
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| | | private: // redefined virtual functions: |
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| | | virtual Boolean sourceIsCompatibleWithUs(MediaSource& source); |
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| | | |
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| | | virtual void doSpecialFrameHandling(unsigned fragmentationOffset, |
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| | | unsigned char* frameStart, |
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| | | unsigned numBytesInFrame, |
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| | | struct timeval framePresentationTime, |
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| | | unsigned numRemainingBytes); |
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| | | virtual Boolean allowFragmentationAfterStart() const; |
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| | | virtual |
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| | | Boolean frameCanAppearAfterPacketStart(unsigned char const* frameStart, |
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| | | unsigned numBytesInFrame) const; |
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| | | virtual unsigned specialHeaderSize() const; |
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| | | |
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| | | private: |
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| | | // MPEG video-specific state, used to decide how to fill out the |
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| | | // video-specific header, and when to include multiple 'frames' in a |
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| | | // single outgoing RTP packet. Eventually we should somehow get this |
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| | | // state from the source (MPEG1or2VideoStreamFramer) instead, as the source |
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| | | // already has this info itself. |
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| | | struct { |
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| | | unsigned temporal_reference; |
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| | | unsigned char picture_coding_type; |
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| | | unsigned char vector_code_bits; // FBV,BFC,FFV,FFC from RFC 2250, sec. 3.4 |
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| | | } fPictureState; |
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| | | Boolean fPreviousFrameWasSlice; |
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| | | // used to implement frameCanAppearAfterPacketStart() |
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| | | Boolean fSequenceHeaderPresent; |
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| | | Boolean fPacketBeginsSlice, fPacketEndsSlice; |
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| | | }; |
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| | | |
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| | | #endif |
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