74 lines
2.8 KiB
C++
74 lines
2.8 KiB
C++
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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 2.1 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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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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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) 1996-2015 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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#ifndef _MPEG4_VIDEO_STREAM_DISCRETE_FRAMER_HH
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#define _MPEG4_VIDEO_STREAM_DISCRETE_FRAMER_HH
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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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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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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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protected:
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// redefined virtual functions:
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virtual void doGetNextFrame();
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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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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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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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private:
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unsigned fNumBitsSeenSoFar; // used by the getNextFrameBit*() routines
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};
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#endif
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