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/**********
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
This library is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**********/
// "liveMedia"
// Copyright (c) 1996-2005 Live Networks, Inc. All rights reserved.
// Transcoder for ADUized MP3 frames
// C++ header
#ifndef _MP3_ADU_TRANSCODER_HH
#define _MP3_ADU_TRANSCODER_HH
#ifndef _FRAMED_FILTER_HH
#include "FramedFilter.hh"
#endif
class MP3ADUTranscoder: public FramedFilter {
public:
static MP3ADUTranscoder* createNew(UsageEnvironment& env,
unsigned outBitrate /* in kbps */,
FramedSource* inputSource);
unsigned outBitrate() const { return fOutBitrate; }
protected:
MP3ADUTranscoder(UsageEnvironment& env,
unsigned outBitrate /* in kbps */,
FramedSource* inputSource);
// called only by createNew()
virtual ~MP3ADUTranscoder();
private:
// redefined virtual functions:
virtual void doGetNextFrame();
virtual void getAttributes() const;
private:
static void afterGettingFrame(void* clientData,
unsigned numBytesRead, unsigned numTruncatedBytes,
struct timeval presentationTime,
unsigned durationInMicroseconds);
void afterGettingFrame1(unsigned numBytesRead, unsigned numTruncatedBytes,
struct timeval presentationTime,
unsigned durationInMicroseconds);
private:
unsigned fOutBitrate; // in kbps
unsigned fAvailableBytesForBackpointer;
unsigned char* fOrigADU;
// used to store incoming ADU prior to transcoding
};
#endif
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