00001
00002 /***************************************************************************
00003  *  jpeg_compressor.h - JPEG image compressor interface
00004  *
00005  *  Created: Fri Aug 11 18:53:19 2006 (on train to Cologne)
00006  *  Copyright  2005-2007  Tim Niemueller [www.niemueller.de]
00007  *
00008  ****************************************************************************/
00009
00010 /*  This program is free software; you can redistribute it and/or modify
00011  *  it under the terms of the GNU General Public License as published by
00012  *  the Free Software Foundation; either version 2 of the License, or
00013  *  (at your option) any later version. A runtime exception applies to
00014  *  this software (see LICENSE.GPL_WRE file mentioned below for details).
00015  *
00016  *  This program is distributed in the hope that it will be useful,
00017  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00018  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00019  *  GNU Library General Public License for more details.
00020  *
00021  *  Read the full text in the LICENSE.GPL_WRE file in the doc directory.
00022  */
00023
00024 #ifndef __FIREVISION_UTILS_COMPRESSION_JPEG_COMPRESSOR_H_
00025 #define __FIREVISION_UTILS_COMPRESSION_JPEG_COMPRESSOR_H_
00026 
00027 #include <fvutils/compression/imagecompressor.h>
00028
00029 class JpegImageCompressor : public ImageCompressor {
00030  public:
00031 
00032   /** JPEG color space. */
00033   enum JpegColorspace {
00034     JPEG_CS_RGB,        /**< RGB */
00035     JPEG_CS_YUV         /**< YUV444 packed */
00036   };
00037
00038   JpegImageCompressor(unsigned int quality = 80, JpegColorspace jcs = JPEG_CS_RGB);
00039   virtual ~JpegImageCompressor();
00040
00041   virtual void          set_image_dimensions(unsigned int width, unsigned int height);
00042   virtual void          set_image_buffer(colorspace_t cspace, unsigned char *buffer);
00043   virtual void          set_destination_buffer(unsigned char *buf, unsigned int buf_size);
00044   virtual size_t        compressed_size();
00045   virtual void          set_filename(const char *filename);
00046   virtual void          set_compression_destination(ImageCompressor::CompressionDestination cd);
00047   virtual bool          supports_compression_destination(ImageCompressor::CompressionDestination cd);
00048   virtual void          compress();
00049   virtual size_t        recommended_compressed_buffer_size();
00050
00051  private:
00052   unsigned char *jpeg_buffer;
00053   unsigned int   jpeg_buffer_size;
00054   unsigned char *buffer;
00055
00056   unsigned int   quality;
00057
00058   unsigned int   width;
00059   unsigned int   height;
00060
00061   unsigned int   jpeg_bytes;
00062
00063   const char    *filename;
00064
00065   JpegColorspace jpeg_cs;
00066   CompressionDestination compdest;
00067 };
00068
00069
00070 #endif