56 lines
2.0 KiB
C++
Executable File
56 lines
2.0 KiB
C++
Executable File
/**********
|
|
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) 1996-2015 Live Networks, Inc. All rights reserved.
|
|
// JPEG video sources
|
|
// C++ header
|
|
|
|
#ifndef _JPEG_VIDEO_SOURCE_HH
|
|
#define _JPEG_VIDEO_SOURCE_HH
|
|
|
|
#ifndef _FRAMED_SOURCE_HH
|
|
#include "FramedSource.hh"
|
|
#endif
|
|
|
|
class JPEGVideoSource: public FramedSource {
|
|
public:
|
|
virtual u_int8_t type() = 0;
|
|
virtual u_int8_t qFactor() = 0;
|
|
virtual u_int8_t width() = 0; // # pixels/8 (or 0 for 2048 pixels)
|
|
virtual u_int8_t height() = 0; // # pixels/8 (or 0 for 2048 pixels)
|
|
|
|
virtual u_int8_t const* quantizationTables(u_int8_t& precision,
|
|
u_int16_t& length);
|
|
// If "qFactor()" returns a value >= 128, then this function is called
|
|
// to tell us the quantization tables that are being used.
|
|
// (The default implementation of this function just returns NULL.)
|
|
// "precision" and "length" are as defined in RFC 2435, section 3.1.8.
|
|
|
|
virtual u_int16_t restartInterval();
|
|
// If restart intervals are being used (i.e., 64 <= type() <= 127), then this function must be
|
|
// redefined - by a subclass - to return a non-zero value.
|
|
|
|
protected:
|
|
JPEGVideoSource(UsageEnvironment& env); // abstract base class
|
|
virtual ~JPEGVideoSource();
|
|
|
|
private:
|
|
// redefined virtual functions:
|
|
virtual Boolean isJPEGVideoSource() const;
|
|
};
|
|
|
|
#endif
|