/usr/include/liveMedia/DVVideoStreamFramer.hh is in liblivemedia-dev 2014.01.13-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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 2.1 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) 1996-2014 Live Networks, Inc. All rights reserved.
// A filter that parses a DV input stream into DV frames to deliver to the downstream object
// C++ header
#ifndef _DV_VIDEO_STREAM_FRAMER_HH
#define _DV_VIDEO_STREAM_FRAMER_HH
#ifndef _FRAMED_FILTER_HH
#include "FramedFilter.hh"
#endif
#define DV_DIF_BLOCK_SIZE 80
#define DV_NUM_BLOCKS_PER_SEQUENCE 150
#define DV_SAVED_INITIAL_BLOCKS_SIZE ((DV_NUM_BLOCKS_PER_SEQUENCE+6-1)*DV_DIF_BLOCK_SIZE)
/* enough data to ensure that it contains an intact 6-block header (which occurs at the start of a 150-block sequence) */
class DVVideoStreamFramer: public FramedFilter {
public:
static DVVideoStreamFramer*
createNew(UsageEnvironment& env, FramedSource* inputSource,
Boolean sourceIsSeekable = False, Boolean leavePresentationTimesUnmodified = False);
// Set "sourceIsSeekable" to True if the input source is a seekable object (e.g. a file), and the server that uses us
// does a seek-to-zero on the source before reading from it. (Our RTSP server implementation does this.)
char const* profileName();
Boolean getFrameParameters(unsigned& frameSize/*bytes*/, double& frameDuration/*microseconds*/);
protected:
DVVideoStreamFramer(UsageEnvironment& env, FramedSource* inputSource,
Boolean sourceIsSeekable, Boolean leavePresentationTimesUnmodified);
// called only by createNew(), or by subclass constructors
virtual ~DVVideoStreamFramer();
protected:
// redefined virtual functions:
virtual Boolean isDVVideoStreamFramer() const;
virtual void doGetNextFrame();
protected:
void getAndDeliverData(); // used to implement "doGetNextFrame()"
static void afterGettingFrame(void* clientData, unsigned frameSize,
unsigned numTruncatedBytes,
struct timeval presentationTime,
unsigned durationInMicroseconds);
void afterGettingFrame(unsigned frameSize, unsigned numTruncatedBytes, struct timeval presentationTime);
void getProfile();
protected:
Boolean fLeavePresentationTimesUnmodified;
void const* fOurProfile;
struct timeval fNextFramePresentationTime;
unsigned char fSavedInitialBlocks[DV_SAVED_INITIAL_BLOCKS_SIZE];
char fInitialBlocksPresent;
Boolean fSourceIsSeekable;
};
#endif
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