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revision 195, Wed Jun 12 20:38:41 2002 UTC revision 652, Sun Nov 17 00:35:33 2002 UTC
# Line 1  Line 1 
1  /**************************************************************************  /*****************************************************************************
2   *   *
3   *      XVID MPEG-4 VIDEO CODEC   *      XVID MPEG-4 VIDEO CODEC
4   *      sum of absolute difference   *  - SAD calculation module (C part) -
5   *   *
6   *      This program is free software; you can redistribute it and/or modify   *  Copyright(C) 2002 Michael Militzer <isibaar@xvid.org>
7   *      it under the terms of the GNU General Public License as published by   *               2002 Peter Ross <pross@xvid.org>
8     *
9     *  This file is part of XviD, a free MPEG-4 video encoder/decoder
10     *
11     *  XviD is free software; you can redistribute it and/or modify it
12     *  under the terms of the GNU General Public License as published by
13   *      the Free Software Foundation; either version 2 of the License, or   *      the Free Software Foundation; either version 2 of the License, or
14   *      (at your option) any later version.   *      (at your option) any later version.
15   *   *
# Line 15  Line 20 
20   *   *
21   *      You should have received a copy of the GNU General Public License   *      You should have received a copy of the GNU General Public License
22   *      along with this program; if not, write to the Free Software   *      along with this program; if not, write to the Free Software
23   *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
24   *   *
25   *************************************************************************/   *  Under section 8 of the GNU General Public License, the copyright
26     *  holders of XVID explicitly forbid distribution in the following
27  /**************************************************************************   *  countries:
28   *   *
29   *      History:   *    - Japan
30     *    - United States of America
31   *   *
32   *      14.02.2002      added sad16bi_c()   *  Linking XviD statically or dynamically with other modules is making a
33   *      10.11.2001      initial version; (c)2001 peter ross <pross@cs.rmit.edu.au>   *  combined work based on XviD.  Thus, the terms and conditions of the
34     *  GNU General Public License cover the whole combination.
35   *   *
36   *************************************************************************/   *  As a special exception, the copyright holders of XviD give you
37     *  permission to link XviD with independent modules that communicate with
38     *  XviD solely through the VFW1.1 and DShow interfaces, regardless of the
39     *  license terms of these independent modules, and to copy and distribute
40     *  the resulting combined work under terms of your choice, provided that
41     *  every copy of the combined work is accompanied by a complete copy of
42     *  the source code of XviD (the version of XviD used to produce the
43     *  combined work), being distributed under the terms of the GNU General
44     *  Public License plus this exception.  An independent module is a module
45     *  which is not derived from or based on XviD.
46     *
47     *  Note that people who make modified versions of XviD are not obligated
48     *  to grant this special exception for their modified versions; it is
49     *  their choice whether to do so.  The GNU General Public License gives
50     *  permission to release a modified version without this exception; this
51     *  exception also makes it possible to release a modified version which
52     *  carries forward this exception.
53     *
54     * $Id: sad.c,v 1.11 2002-11-17 00:32:06 edgomez Exp $
55     *
56     ****************************************************************************/
57    
58  #include "../portab.h"  #include "../portab.h"
59  #include "sad.h"  #include "sad.h"
# Line 42  Line 68 
68    
69  #define ABS(X) (((X)>0)?(X):-(X))  #define ABS(X) (((X)>0)?(X):-(X))
70    
71    #define MRSAD16_CORRFACTOR 8
72  uint32_t  uint32_t
73  sad8FuncPtr sad8;  mrsad16_c(const uint8_t * const cur,
74                    const uint8_t * const ref,                    const uint8_t * const ref,
75                      const uint32_t stride,
76                    const uint32_t best_sad)                    const uint32_t best_sad)
77  {  {
78    
# Line 165  Line 192 
192  {  {
193    
194          uint32_t sad = 0;          uint32_t sad = 0;
195            uint32_t i, j;
196            uint8_t const *ptr_cur = cur;
197            uint8_t const *ptr_ref1 = ref1;
198            uint8_t const *ptr_ref2 = ref2;
199    
200            for (j = 0; j < 8; j++) {
201    
202                    for (i = 0; i < 8; i++) {
203                            int pixel = (ptr_ref1[i] + ptr_ref2[i] + 1) / 2;
204    
205                            if (pixel < 0) {
206                                    pixel = 0;
207                            } else if (pixel > 255) {
208                                    pixel = 255;
209                            }
210    
211                            sad += ABS(ptr_cur[i] - pixel);
212                    }
213    
214                    ptr_cur += stride;
215                    ptr_ref1 += stride;
216                    ptr_ref2 += stride;
217    
218            }
219    
220            return sad;
221    
222    }
223    
224    
225    
226    uint32_t
227    sad8_c(const uint8_t * const cur,
228               const uint8_t * const ref,
229               const uint32_t stride)
230    {
231            uint32_t sad = 0;
232            uint32_t i, j;
233          uint8_t const *ptr_cur = cur;          uint8_t const *ptr_cur = cur;
234          uint8_t const *ptr_ref = ref;          uint8_t const *ptr_ref = ref;
235    
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