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revision 357, Sun Aug 4 17:28:50 2002 UTC revision 653, Sun Nov 17 00:41:20 2002 UTC
# Line 1  Line 1 
1    /*****************************************************************************
2     *
3     *  XVID MPEG-4 VIDEO CODEC
4     *  - Adaptive quantization functions -
5     *
6     *  Copyright(C) 2002 Peter Ross <pross@xvid.org>
7     *               2002 Christoph Lampert <gruel@web.de>
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
14     *  (at your option) any later version.
15     *
16     *  This program is distributed in the hope that it will be useful,
17     *  but WITHOUT ANY WARRANTY; without even the implied warranty of
18     *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19     *  GNU General Public License for more details.
20     *
21     *  You should have received a copy of the GNU General Public License
22     *  along with this program; if not, write to the Free Software
23     *  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     *    - Japan
30     *    - United States of America
31     *
32     *  Linking XviD statically or dynamically with other modules is making a
33     *  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: adapt_quant.c,v 1.12 2002-11-17 00:41:19 edgomez Exp $
55     *
56     ****************************************************************************/
57    
58  #include "../portab.h"  #include "../portab.h"
59  #include "adapt_quant.h"  #include "adapt_quant.h"
60    
# Line 6  Line 63 
63  #define MAX(a,b)      (((a) > (b)) ? (a) : (b))  #define MAX(a,b)      (((a) > (b)) ? (a) : (b))
64  #define RDIFF(a,b)    ((int)(a+0.5)-(int)(b+0.5))  #define RDIFF(a,b)    ((int)(a+0.5)-(int)(b+0.5))
65    
66    /*****************************************************************************
67     * Functions
68     ****************************************************************************/
69    
70  int  int
71  normalize_quantizer_field(float *in,  normalize_quantizer_field(float *in,
72                                                    int *out,                                                    int *out,
# Line 65  Line 126 
126  {  {
127          int i, j, k, l;          int i, j, k, l;
128    
129          static float *quant;          float *quant;
130          unsigned char *ptr;          unsigned char *ptr;
131          float *val;          float *val;
132          float global = 0.;          float global = 0.;
# Line 84  Line 145 
145          const float LowerLimit = 25;          const float LowerLimit = 25;
146    
147    
         if (!quant)  
148                  if (!(quant = (float *) malloc(mb_width * mb_height * sizeof(float))))                  if (!(quant = (float *) malloc(mb_width * mb_height * sizeof(float))))
149                          return -1;                  return(-1);
150    
151          val = (float *) malloc(mb_width * mb_height * sizeof(float));          if(!(val = (float *) malloc(mb_width * mb_height * sizeof(float)))) {
152                    free(quant);
153                    return(-1);
154            }
155    
156          for (k = 0; k < mb_height; k++) {          for (k = 0; k < mb_height; k++) {
157                  for (l = 0; l < mb_width; l++)  // do this for all macroblocks individually                  for (l = 0; l < mb_width; l++)  // do this for all macroblocks individually
# Line 130  Line 193 
193                          }                          }
194                  }                  }
195          }          }
196          free(val);  
197          return normalize_quantizer_field(quant, intquant, mb_width * mb_height,          i = normalize_quantizer_field(quant, intquant,
198                                                                      mb_width * mb_height,
199                                                                           min_quant, max_quant);                                                                           min_quant, max_quant);
200    
201            free(val);
202            free(quant);
203    
204            return(i);
205    
206  }  }
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