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/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
* Copyright (C) 2011 D. R. Commander. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
//
// JpegCompressor compresses RGB input into a JPEG image and stores it in
// an underlying MemOutStream
//
#ifndef __RFB_JPEGCOMPRESSOR_H__
#define __RFB_JPEGCOMPRESSOR_H__
#include <rdr/MemOutStream.h>
#include <rfb/PixelFormat.h>
#include <rfb/Rect.h>
#include <stdio.h>
extern "C" {
#include <jpeglib.h>
}
#include <setjmp.h>
namespace rfb {
typedef struct {
struct jpeg_error_mgr pub;
jmp_buf jmpBuffer;
char lastError[JMSG_LENGTH_MAX];
} JPEG_ERROR_MGR;
class JpegCompressor;
typedef struct {
struct jpeg_destination_mgr pub;
JpegCompressor *instance;
} JPEG_DEST_MGR;
enum JPEG_SUBSAMP {
SUBSAMP_NONE,
SUBSAMP_422,
SUBSAMP_420
};
class JpegCompressor : public rdr::MemOutStream {
public:
JpegCompressor(int bufferLen = 128*1024);
virtual ~JpegCompressor();
void compress(rdr::U8 *, int, const Rect&, const PixelFormat&, int,
JPEG_SUBSAMP);
void writeBytes(const void*, int);
inline rdr::U8* getstart() { return start; }
inline int overrun(int itemSize, int nItems) {
return MemOutStream::overrun(itemSize, nItems);
}
private:
struct jpeg_compress_struct cinfo;
JPEG_ERROR_MGR err;
JPEG_DEST_MGR dest;
};
} // end of namespace rfb
#endif
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