| /********** |
| 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) 1996-2020 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; |
| }; |
| |
| #endif |