80 lines
3.1 KiB
C++
Executable File
80 lines
3.1 KiB
C++
Executable File
/**********
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This library is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the
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Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
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This library is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this library; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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**********/
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// "liveMedia"
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// Copyright (c) 1996-2015 Live Networks, Inc. All rights reserved.
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// 'Ogg' File Sink (recording a single media track only)
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// C++ header
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#ifndef _OGG_FILE_SINK_HH
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#define _OGG_FILE_SINK_HH
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#ifndef _FILE_SINK_HH
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#include "FileSink.hh"
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#endif
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class OggFileSink: public FileSink {
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public:
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static OggFileSink* createNew(UsageEnvironment& env, char const* fileName,
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unsigned samplingFrequency = 0, // used for granule_position
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char const* configStr = NULL,
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// "configStr" is an optional 'SDP format' string (Base64-encoded)
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// representing 'packed configuration headers' ("identification", "comment", "setup")
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// to prepend to the output. (For 'Vorbis" audio and 'Theora' video.)
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unsigned bufferSize = 100000,
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Boolean oneFilePerFrame = False);
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// See "FileSink.hh" for a description of these parameters.
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protected:
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OggFileSink(UsageEnvironment& env, FILE* fid, unsigned samplingFrequency, char const* configStr,
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unsigned bufferSize, char const* perFrameFileNamePrefix);
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// called only by createNew()
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virtual ~OggFileSink();
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protected: // redefined virtual functions:
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virtual Boolean continuePlaying();
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virtual void addData(unsigned char const* data, unsigned dataSize,
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struct timeval presentationTime);
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virtual void afterGettingFrame(unsigned frameSize, unsigned numTruncatedBytes,
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struct timeval presentationTime);
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private:
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static void ourOnSourceClosure(void* clientData);
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void ourOnSourceClosure();
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private:
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unsigned fSamplingFrequency;
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char const* fConfigStr;
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Boolean fHaveWrittenFirstFrame, fHaveSeenEOF;
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struct timeval fFirstPresentationTime;
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int64_t fGranulePosition;
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int64_t fGranulePositionAdjustment; // used to ensure that "fGranulePosition" stays monotonic
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u_int32_t fPageSequenceNumber;
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u_int8_t fPageHeaderBytes[27];
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// the header of each Ogg page, through the "number_page_segments" byte
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// Special fields used for Theora video:
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Boolean fIsTheora;
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u_int64_t fGranuleIncrementPerFrame; // == 1 << KFGSHIFT
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// Because the last Ogg page before EOF needs to have a special 'eos' bit set in the header,
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// we need to defer the writing of each incoming frame. To do this, we maintain a 2nd buffer:
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unsigned char* fAltBuffer;
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unsigned fAltFrameSize, fAltNumTruncatedBytes;
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struct timeval fAltPresentationTime;
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};
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#endif
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