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jpeg_compressor.h

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 namespace firevision {
00030 #if 0 /* just to make Emacs auto-indent happy */
00031 }
00032 #endif
00033 
00034 class JpegImageCompressor : public ImageCompressor {
00035  public:
00036 
00037   /** JPEG color space. */
00038   enum JpegColorspace {
00039     JPEG_CS_RGB,        /**< RGB */
00040     JPEG_CS_YUV         /**< YUV444 packed */
00041   };
00042 
00043   JpegImageCompressor(unsigned int quality = 80, JpegColorspace jcs = JPEG_CS_RGB);
00044   virtual ~JpegImageCompressor();
00045 
00046   virtual void          set_image_dimensions(unsigned int width, unsigned int height);
00047   virtual void          set_image_buffer(colorspace_t cspace, unsigned char *buffer);
00048   virtual void          set_destination_buffer(unsigned char *buf, unsigned int buf_size);
00049   virtual size_t        compressed_size();
00050   virtual void          set_filename(const char *filename);
00051   virtual void          set_compression_destination(ImageCompressor::CompressionDestination cd);
00052   virtual bool          supports_compression_destination(ImageCompressor::CompressionDestination cd);
00053   virtual void          compress();
00054   virtual size_t        recommended_compressed_buffer_size();
00055 
00056  private:
00057   unsigned char *jpeg_buffer;
00058   unsigned int   jpeg_buffer_size;
00059   unsigned char *buffer;
00060 
00061   unsigned int   quality;
00062 
00063   unsigned int   width;
00064   unsigned int   height;
00065 
00066   unsigned int   jpeg_bytes;
00067 
00068   const char    *filename;
00069 
00070   JpegColorspace jpeg_cs;
00071   CompressionDestination compdest;
00072 };
00073 
00074 } // end namespace firevision
00075 
00076 #endif
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