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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) 1996-2017 Live Networks, Inc. All rights reserved. |
| | | // A filter that breaks up an MPEG (1,2) audio elementary stream into frames |
| | | // C++ header |
| | | |
| | | #ifndef _MPEG_1OR2_AUDIO_STREAM_FRAMER_HH |
| | | #define _MPEG_1OR2_AUDIO_STREAM_FRAMER_HH |
| | | |
| | | #ifndef _FRAMED_FILTER_HH |
| | | #include "FramedFilter.hh" |
| | | #endif |
| | | |
| | | class MPEG1or2AudioStreamFramer: public FramedFilter { |
| | | public: |
| | | static MPEG1or2AudioStreamFramer* |
| | | createNew(UsageEnvironment& env, FramedSource* inputSource, |
| | | Boolean syncWithInputSource = False); |
| | | // If "syncWithInputSource" is True, the stream's presentation time |
| | | // will be reset to that of the input source, whenever new data |
| | | // is read from it. |
| | | |
| | | void flushInput(); // called if there is a discontinuity (seeking) in the input |
| | | |
| | | private: |
| | | MPEG1or2AudioStreamFramer(UsageEnvironment& env, FramedSource* inputSource, |
| | | Boolean syncWithInputSource); |
| | | // called only by createNew() |
| | | virtual ~MPEG1or2AudioStreamFramer(); |
| | | |
| | | static void continueReadProcessing(void* clientData, |
| | | unsigned char* ptr, unsigned size, |
| | | struct timeval presentationTime); |
| | | void continueReadProcessing(); |
| | | |
| | | void resetPresentationTime(struct timeval newPresentationTime); |
| | | // useful if we're being synced with a separate (e.g., video) stream |
| | | |
| | | private: |
| | | // redefined virtual functions: |
| | | virtual void doGetNextFrame(); |
| | | |
| | | private: |
| | | void reset(); |
| | | struct timeval currentFramePlayTime() const; |
| | | |
| | | private: |
| | | Boolean fSyncWithInputSource; |
| | | struct timeval fNextFramePresentationTime; |
| | | |
| | | private: // parsing state |
| | | class MPEG1or2AudioStreamParser* fParser; |
| | | friend class MPEG1or2AudioStreamParser; // hack |
| | | }; |
| | | |
| | | #endif |