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revision 357, Sun Aug 4 17:28:50 2002 UTC revision 605, Sat Oct 19 12:20:33 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 program is an implementation of a part of one or more MPEG-4
10     *  Video tools as specified in ISO/IEC 14496-2 standard.  Those intending
11     *  to use this software module in hardware or software products are
12     *  advised that its use may infringe existing patents or copyrights, and
13     *  any such use would be at such party's own risk.  The original
14     *  developer of this software module and his/her company, and subsequent
15     *  editors and their companies, will have no liability for use of this
16     *  software or modifications or derivatives thereof.
17     *
18     *  This program is free software ; you can redistribute it and/or modify
19     *  it under the terms of the GNU General Public License as published by
20     *  the Free Software Foundation ; either version 2 of the License, or
21     *  (at your option) any later version.
22     *
23     *  This program is distributed in the hope that it will be useful,
24     *  but WITHOUT ANY WARRANTY ; without even the implied warranty of
25     *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
26     *  GNU General Public License for more details.
27     *
28     *  You should have received a copy of the GNU General Public License
29     *  along with this program ; if not, write to the Free Software
30     *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
31     *
32     *  $Id: adapt_quant.c,v 1.11 2002-10-19 12:20:33 edgomez Exp $
33     *
34     ****************************************************************************/
35    
36  #include "../portab.h"  #include "../portab.h"
37  #include "adapt_quant.h"  #include "adapt_quant.h"
38    
# Line 6  Line 41 
41  #define MAX(a,b)      (((a) > (b)) ? (a) : (b))  #define MAX(a,b)      (((a) > (b)) ? (a) : (b))
42  #define RDIFF(a,b)    ((int)(a+0.5)-(int)(b+0.5))  #define RDIFF(a,b)    ((int)(a+0.5)-(int)(b+0.5))
43    
44    /*****************************************************************************
45     * Functions
46     ****************************************************************************/
47    
48  int  int
49  normalize_quantizer_field(float *in,  normalize_quantizer_field(float *in,
50                                                    int *out,                                                    int *out,
# Line 65  Line 104 
104  {  {
105          int i, j, k, l;          int i, j, k, l;
106    
107          static float *quant;          float *quant;
108          unsigned char *ptr;          unsigned char *ptr;
109          float *val;          float *val;
110          float global = 0.;          float global = 0.;
# Line 84  Line 123 
123          const float LowerLimit = 25;          const float LowerLimit = 25;
124    
125    
         if (!quant)  
126                  if (!(quant = (float *) malloc(mb_width * mb_height * sizeof(float))))                  if (!(quant = (float *) malloc(mb_width * mb_height * sizeof(float))))
127                          return -1;                  return(-1);
128    
129          val = (float *) malloc(mb_width * mb_height * sizeof(float));          if(!(val = (float *) malloc(mb_width * mb_height * sizeof(float)))) {
130                    free(quant);
131                    return(-1);
132            }
133    
134          for (k = 0; k < mb_height; k++) {          for (k = 0; k < mb_height; k++) {
135                  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 171 
171                          }                          }
172                  }                  }
173          }          }
174          free(val);  
175          return normalize_quantizer_field(quant, intquant, mb_width * mb_height,          i = normalize_quantizer_field(quant, intquant,
176                                                                      mb_width * mb_height,
177                                                                           min_quant, max_quant);                                                                           min_quant, max_quant);
178    
179            free(val);
180            free(quant);
181    
182            return(i);
183    
184  }  }
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