| /********** |
| 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. |
| // 'Ogg' File Sink (recording a single media track only) |
| // C++ header |
| |
| #ifndef _OGG_FILE_SINK_HH |
| #define _OGG_FILE_SINK_HH |
| |
| #ifndef _FILE_SINK_HH |
| #include "FileSink.hh" |
| #endif |
| |
| class OggFileSink: public FileSink { |
| public: |
| static OggFileSink* createNew(UsageEnvironment& env, char const* fileName, |
| unsigned samplingFrequency = 0, // used for granule_position |
| char const* configStr = NULL, |
| // "configStr" is an optional 'SDP format' string (Base64-encoded) |
| // representing 'packed configuration headers' ("identification", "comment", "setup") |
| // to prepend to the output. (For 'Vorbis" audio and 'Theora' video.) |
| unsigned bufferSize = 100000, |
| Boolean oneFilePerFrame = False); |
| // See "FileSink.hh" for a description of these parameters. |
| |
| protected: |
| OggFileSink(UsageEnvironment& env, FILE* fid, unsigned samplingFrequency, char const* configStr, |
| unsigned bufferSize, char const* perFrameFileNamePrefix); |
| // called only by createNew() |
| virtual ~OggFileSink(); |
| |
| protected: // redefined virtual functions: |
| virtual Boolean continuePlaying(); |
| virtual void addData(unsigned char const* data, unsigned dataSize, |
| struct timeval presentationTime); |
| virtual void afterGettingFrame(unsigned frameSize, unsigned numTruncatedBytes, |
| struct timeval presentationTime); |
| |
| private: |
| static void ourOnSourceClosure(void* clientData); |
| void ourOnSourceClosure(); |
| |
| private: |
| unsigned fSamplingFrequency; |
| char const* fConfigStr; |
| Boolean fHaveWrittenFirstFrame, fHaveSeenEOF; |
| struct timeval fFirstPresentationTime; |
| int64_t fGranulePosition; |
| int64_t fGranulePositionAdjustment; // used to ensure that "fGranulePosition" stays monotonic |
| u_int32_t fPageSequenceNumber; |
| u_int8_t fPageHeaderBytes[27]; |
| // the header of each Ogg page, through the "number_page_segments" byte |
| |
| // Special fields used for Theora video: |
| Boolean fIsTheora; |
| u_int64_t fGranuleIncrementPerFrame; // == 1 << KFGSHIFT |
| |
| // Because the last Ogg page before EOF needs to have a special 'eos' bit set in the header, |
| // we need to defer the writing of each incoming frame. To do this, we maintain a 2nd buffer: |
| unsigned char* fAltBuffer; |
| unsigned fAltFrameSize, fAltNumTruncatedBytes; |
| struct timeval fAltPresentationTime; |
| }; |
| |
| #endif |