/**********
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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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// Transcoder for ADUized MP3 frames
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// C++ header
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#ifndef _MP3_ADU_TRANSCODER_HH
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#define _MP3_ADU_TRANSCODER_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 MP3ADUTranscoder: public FramedFilter {
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public:
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static MP3ADUTranscoder* createNew(UsageEnvironment& env,
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unsigned outBitrate /* in kbps */,
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FramedSource* inputSource);
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unsigned outBitrate() const { return fOutBitrate; }
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protected:
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MP3ADUTranscoder(UsageEnvironment& env,
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unsigned outBitrate /* in kbps */,
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FramedSource* inputSource);
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// called only by createNew()
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virtual ~MP3ADUTranscoder();
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private:
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// redefined virtual functions:
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virtual void doGetNextFrame();
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virtual void getAttributes() const;
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private:
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static void afterGettingFrame(void* clientData,
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unsigned numBytesRead, unsigned numTruncatedBytes,
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struct timeval presentationTime,
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unsigned durationInMicroseconds);
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void afterGettingFrame1(unsigned numBytesRead, unsigned numTruncatedBytes,
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struct timeval presentationTime,
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unsigned durationInMicroseconds);
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private:
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unsigned fOutBitrate; // in kbps
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unsigned fAvailableBytesForBackpointer;
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unsigned char* fOrigADU;
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// used to store incoming ADU prior to transcoding
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};
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#endif
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