98 lines
3.0 KiB
C++
98 lines
3.0 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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// 'ADU' MP3 streams (for improved loss-tolerance)
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// C++ header
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#ifndef _MP3_ADU_HH
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#define _MP3_ADU_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 ADUFromMP3Source: public FramedFilter {
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public:
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static ADUFromMP3Source* createNew(UsageEnvironment& env,
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FramedSource* inputSource,
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Boolean includeADUdescriptors = True);
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void resetInput();
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// This is called whenever there's a discontinuity in the input MP3 source
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// (e.g., due to seeking within the source). It causes any still-unprocessed
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// MP3 frame data within our queue to be discarded, so that it does not
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// erroneously get used by backpointers from the new MP3 frames.
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Boolean setScaleFactor(int scale);
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protected:
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ADUFromMP3Source(UsageEnvironment& env,
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FramedSource* inputSource,
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Boolean includeADUdescriptors);
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// called only by createNew()
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virtual ~ADUFromMP3Source();
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private:
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// Redefined virtual functions:
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virtual void doGetNextFrame();
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virtual char const* MIMEtype() const;
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private:
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Boolean doGetNextFrame1();
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private:
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Boolean fAreEnqueueingMP3Frame;
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class SegmentQueue* fSegments;
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Boolean fIncludeADUdescriptors;
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unsigned fTotalDataSizeBeforePreviousRead;
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int fScale;
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unsigned fFrameCounter;
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};
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class MP3FromADUSource: public FramedFilter {
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public:
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static MP3FromADUSource* createNew(UsageEnvironment& env,
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FramedSource* inputSource,
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Boolean includeADUdescriptors = True);
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protected:
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MP3FromADUSource(UsageEnvironment& env,
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FramedSource* inputSource,
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Boolean includeADUdescriptors);
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// called only by createNew()
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virtual ~MP3FromADUSource();
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private:
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// Redefined virtual functions:
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virtual void doGetNextFrame();
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virtual char const* MIMEtype() const;
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private:
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Boolean needToGetAnADU();
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void insertDummyADUsIfNecessary();
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Boolean generateFrameFromHeadADU();
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private:
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Boolean fAreEnqueueingADU;
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class SegmentQueue* fSegments;
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};
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// Definitions of external C functions that implement various MP3 operations:
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extern "C" int mp3ZeroOutSideInfo(unsigned char*, unsigned, unsigned);
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#endif
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