| /********** |
| 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. |
| // 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 |