/********** 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 .) 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) 1996-2015 Live Networks, Inc. All rights reserved. // 'ADU' MP3 streams (for improved loss-tolerance) // C++ header #ifndef _MP3_ADU_HH #define _MP3_ADU_HH #ifndef _FRAMED_FILTER_HH #include "FramedFilter.hh" #endif class ADUFromMP3Source: public FramedFilter { public: static ADUFromMP3Source* createNew(UsageEnvironment& env, FramedSource* inputSource, Boolean includeADUdescriptors = True); void resetInput(); // This is called whenever there's a discontinuity in the input MP3 source // (e.g., due to seeking within the source). It causes any still-unprocessed // MP3 frame data within our queue to be discarded, so that it does not // erroneously get used by backpointers from the new MP3 frames. Boolean setScaleFactor(int scale); protected: ADUFromMP3Source(UsageEnvironment& env, FramedSource* inputSource, Boolean includeADUdescriptors); // called only by createNew() virtual ~ADUFromMP3Source(); private: // Redefined virtual functions: virtual void doGetNextFrame(); virtual char const* MIMEtype() const; private: Boolean doGetNextFrame1(); private: Boolean fAreEnqueueingMP3Frame; class SegmentQueue* fSegments; Boolean fIncludeADUdescriptors; unsigned fTotalDataSizeBeforePreviousRead; int fScale; unsigned fFrameCounter; }; class MP3FromADUSource: public FramedFilter { public: static MP3FromADUSource* createNew(UsageEnvironment& env, FramedSource* inputSource, Boolean includeADUdescriptors = True); protected: MP3FromADUSource(UsageEnvironment& env, FramedSource* inputSource, Boolean includeADUdescriptors); // called only by createNew() virtual ~MP3FromADUSource(); private: // Redefined virtual functions: virtual void doGetNextFrame(); virtual char const* MIMEtype() const; private: Boolean needToGetAnADU(); void insertDummyADUsIfNecessary(); Boolean generateFrameFromHeadADU(); private: Boolean fAreEnqueueingADU; class SegmentQueue* fSegments; }; // Definitions of external C functions that implement various MP3 operations: extern "C" int mp3ZeroOutSideInfo(unsigned char*, unsigned, unsigned); #endif