/usr/include/liveMedia/MP3ADUinterleaving.hh is in liblivemedia-dev 2018.02.18-1.
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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 3 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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
**********/
// "liveMedia"
// Copyright (c) 1996-2018 Live Networks, Inc. All rights reserved.
// Interleaving of MP3 ADUs
// C++ header
#ifndef _MP3_ADU_INTERLEAVING_HH
#define _MP3_ADU_INTERLEAVING_HH
#ifndef _FRAMED_FILTER_HH
#include "FramedFilter.hh"
#endif
// A data structure used to represent an interleaving
#define MAX_CYCLE_SIZE 256
class Interleaving {
public:
Interleaving(unsigned cycleSize, unsigned char const* cycleArray);
virtual ~Interleaving();
unsigned cycleSize() const {return fCycleSize;}
unsigned char lookupInverseCycle(unsigned char index) const {
return fInverseCycle[index];
}
private:
unsigned fCycleSize;
unsigned char fInverseCycle[MAX_CYCLE_SIZE];
};
// This class is used only as a base for the following two:
class MP3ADUinterleaverBase: public FramedFilter {
protected:
MP3ADUinterleaverBase(UsageEnvironment& env,
FramedSource* inputSource);
// abstract base class
virtual ~MP3ADUinterleaverBase();
static FramedSource* getInputSource(UsageEnvironment& env,
char const* inputSourceName);
static void afterGettingFrame(void* clientData,
unsigned numBytesRead,
unsigned numTruncatedBytes,
struct timeval presentationTime,
unsigned durationInMicroseconds);
virtual void afterGettingFrame(unsigned numBytesRead,
struct timeval presentationTime,
unsigned durationInMicroseconds) = 0;
};
// This class is used to convert an ADU sequence from non-interleaved
// to interleaved form:
class MP3ADUinterleaver: public MP3ADUinterleaverBase {
public:
static MP3ADUinterleaver* createNew(UsageEnvironment& env,
Interleaving const& interleaving,
FramedSource* inputSource);
protected:
MP3ADUinterleaver(UsageEnvironment& env,
Interleaving const& interleaving,
FramedSource* inputSource);
// called only by createNew()
virtual ~MP3ADUinterleaver();
private:
// redefined virtual functions:
virtual void doGetNextFrame();
virtual void afterGettingFrame(unsigned numBytesRead,
struct timeval presentationTime,
unsigned durationInMicroseconds);
private:
void releaseOutgoingFrame();
private:
Interleaving const fInterleaving;
class InterleavingFrames* fFrames;
unsigned char fPositionOfNextIncomingFrame;
unsigned fII, fICC;
};
// This class is used to convert an ADU sequence from interleaved
// to non-interleaved form:
class MP3ADUdeinterleaver: public MP3ADUinterleaverBase {
public:
static MP3ADUdeinterleaver* createNew(UsageEnvironment& env,
FramedSource* inputSource);
protected:
MP3ADUdeinterleaver(UsageEnvironment& env,
FramedSource* inputSource);
// called only by createNew()
virtual ~MP3ADUdeinterleaver();
private:
// redefined virtual functions:
virtual void doGetNextFrame();
virtual void afterGettingFrame(unsigned numBytesRead,
struct timeval presentationTime,
unsigned durationInMicroseconds);
private:
void releaseOutgoingFrame();
private:
class DeinterleavingFrames* fFrames;
unsigned fIIlastSeen, fICClastSeen;
};
#endif
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