/**********
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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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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) 1996-2017 Live Networks, Inc. All rights reserved.
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// A filter that breaks up an MPEG (1,2) audio elementary stream into frames
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// C++ header
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#ifndef _MPEG_1OR2_AUDIO_STREAM_FRAMER_HH
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#define _MPEG_1OR2_AUDIO_STREAM_FRAMER_HH
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#ifndef _FRAMED_FILTER_HH
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#include "FramedFilter.hh"
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#endif
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class MPEG1or2AudioStreamFramer: public FramedFilter {
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public:
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static MPEG1or2AudioStreamFramer*
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createNew(UsageEnvironment& env, FramedSource* inputSource,
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Boolean syncWithInputSource = False);
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// If "syncWithInputSource" is True, the stream's presentation time
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// will be reset to that of the input source, whenever new data
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// is read from it.
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void flushInput(); // called if there is a discontinuity (seeking) in the input
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private:
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MPEG1or2AudioStreamFramer(UsageEnvironment& env, FramedSource* inputSource,
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Boolean syncWithInputSource);
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// called only by createNew()
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virtual ~MPEG1or2AudioStreamFramer();
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static void continueReadProcessing(void* clientData,
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unsigned char* ptr, unsigned size,
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struct timeval presentationTime);
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void continueReadProcessing();
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void resetPresentationTime(struct timeval newPresentationTime);
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// useful if we're being synced with a separate (e.g., video) stream
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private:
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// redefined virtual functions:
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virtual void doGetNextFrame();
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private:
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void reset();
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struct timeval currentFramePlayTime() const;
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private:
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Boolean fSyncWithInputSource;
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struct timeval fNextFramePresentationTime;
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private: // parsing state
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class MPEG1or2AudioStreamParser* fParser;
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friend class MPEG1or2AudioStreamParser; // hack
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};
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#endif
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