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revision 1.2, Fri Mar 8 19:16:35 2002 UTC revision 1.16, Wed Nov 26 01:04:34 2008 UTC
# Line 1  Line 1 
1    /*****************************************************************************
2     *
3     *  XVID MPEG-4 VIDEO CODEC
4     *  - Quantization matrix management code  -
5     *
6     *  Copyright(C) 2002 Michael Militzer <isibaar@xvid.org>
7     *               2002 Peter Ross <pross@xvid.org>
8     *
9     *  This program is free software ; you can redistribute it and/or modify
10     *  it under the terms of the GNU General Public License as published by
11     *  the Free Software Foundation ; either version 2 of the License, or
12     *  (at your option) any later version.
13     *
14     *  This program is distributed in the hope that it will be useful,
15     *  but WITHOUT ANY WARRANTY ; without even the implied warranty of
16     *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17     *  GNU General Public License for more details.
18     *
19     *  You should have received a copy of the GNU General Public License
20     *  along with this program ; if not, write to the Free Software
21     *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
22     *
23     * $Id$
24     *
25     ****************************************************************************/
26    
27  #include "quant_matrix.h"  #include "quant_matrix.h"
28    
29  #define FIX(X) (1 << 16) / (X) + 1  #define FIX(X)   (((X)==1) ? 0xFFFF : ((1UL << 16) / (X) + 1))
30    #define FIXL(X)    ((1UL << 16) / (X) - 1)
31    
32  uint8_t intra_matrix_changed;  /*****************************************************************************
33  uint8_t inter_matrix_changed;   * Default matrices
34     ****************************************************************************/
35    
36  int16_t intra_matrix[64] = {  static const uint8_t default_intra_matrix[64] = {
37       8,17,18,19,21,23,25,27,       8,17,18,19,21,23,25,27,
38      17,18,19,21,23,25,27,28,      17,18,19,21,23,25,27,28,
39      20,21,22,23,24,26,28,30,      20,21,22,23,24,26,28,30,
# Line 16  Line 44 
44      27,28,30,32,35,38,41,45      27,28,30,32,35,38,41,45
45  };  };
46    
47  int16_t intra_matrix_fix[64] = {  static const uint8_t default_inter_matrix[64] = {
      FIX(8),FIX(17),FIX(18),FIX(19),FIX(21),FIX(23),FIX(25),FIX(27),  
     FIX(17),FIX(18),FIX(19),FIX(21),FIX(23),FIX(25),FIX(27),FIX(28),  
     FIX(20),FIX(21),FIX(22),FIX(23),FIX(24),FIX(26),FIX(28),FIX(30),  
     FIX(21),FIX(22),FIX(23),FIX(24),FIX(26),FIX(28),FIX(30),FIX(32),  
     FIX(22),FIX(23),FIX(24),FIX(26),FIX(28),FIX(30),FIX(32),FIX(35),  
     FIX(23),FIX(24),FIX(26),FIX(28),FIX(30),FIX(32),FIX(35),FIX(38),  
     FIX(25),FIX(26),FIX(28),FIX(30),FIX(32),FIX(35),FIX(38),FIX(41),  
     FIX(27),FIX(28),FIX(30),FIX(32),FIX(35),FIX(38),FIX(41),FIX(45)  
 };  
   
 int16_t inter_matrix[64] = {  
48      16,17,18,19,20,21,22,23,      16,17,18,19,20,21,22,23,
49      17,18,19,20,21,22,23,24,      17,18,19,20,21,22,23,24,
50      18,19,20,21,22,23,24,25,      18,19,20,21,22,23,24,25,
# Line 38  Line 55 
55      23,24,25,27,28,30,31,33      23,24,25,27,28,30,31,33
56  };  };
57    
58  int16_t inter_matrix_fix[64] = {  const uint16_t *
59      FIX(16),FIX(17),FIX(18),FIX(19),FIX(20),FIX(21),FIX(22),FIX(23),  get_intra_matrix(const uint16_t * mpeg_quant_matrices)
60      FIX(17),FIX(18),FIX(19),FIX(20),FIX(21),FIX(22),FIX(23),FIX(24),  {
61      FIX(18),FIX(19),FIX(20),FIX(21),FIX(22),FIX(23),FIX(24),FIX(25),          return(mpeg_quant_matrices + 0*64);
     FIX(19),FIX(20),FIX(21),FIX(22),FIX(23),FIX(24),FIX(26),FIX(27),  
     FIX(20),FIX(21),FIX(22),FIX(23),FIX(25),FIX(26),FIX(27),FIX(28),  
     FIX(21),FIX(22),FIX(23),FIX(24),FIX(26),FIX(27),FIX(28),FIX(30),  
     FIX(22),FIX(23),FIX(24),FIX(26),FIX(27),FIX(28),FIX(30),FIX(31),  
     FIX(23),FIX(24),FIX(25),FIX(27),FIX(28),FIX(30),FIX(31),FIX(33)  
 };  
   
 uint8_t get_intra_matrix_status(void) {  
         return intra_matrix_changed;  
62  }  }
63    
64  uint8_t get_inter_matrix_status(void) {  const uint16_t *
65          return inter_matrix_changed;  get_inter_matrix(const uint16_t * mpeg_quant_matrices)
66    {
67            return(mpeg_quant_matrices + 4*64);
68  }  }
69    
70  void set_intra_matrix_status(uint8_t status) {  const uint8_t *
71          intra_matrix_changed = status;  get_default_intra_matrix(void)
72    {
73            return default_intra_matrix;
74  }  }
75    
76  void set_inter_matrix_status(uint8_t status) {  const uint8_t *
77          inter_matrix_changed = status;  get_default_inter_matrix(void)
78    {
79            return default_inter_matrix;
80  }  }
81    
82  int16_t *get_intra_matrix(void) {  int
83          return intra_matrix;  is_custom_intra_matrix(const uint16_t * mpeg_quant_matrices)
84  }  {
85            int i;
86            const uint16_t *intra_matrix = get_intra_matrix(mpeg_quant_matrices);
87            const uint8_t *def_intra_matrix = get_default_intra_matrix();
88    
89  int16_t *get_inter_matrix(void) {          for (i = 0; i < 64; i++) {
90          return inter_matrix;                  if(intra_matrix[i] != def_intra_matrix[i])
91                            return 1;
92            }
93            return 0;
94  }  }
95    
96  uint8_t set_intra_matrix(uint8_t *matrix)  int
97    is_custom_inter_matrix(const uint16_t * mpeg_quant_matrices)
98  {  {
99          int i;          int i;
100            const uint16_t *inter_matrix = get_inter_matrix(mpeg_quant_matrices);
101          intra_matrix_changed = 0;          const uint8_t *def_inter_matrix = get_default_inter_matrix();
102    
103          for(i = 0; i < 64; i++) {          for(i = 0; i < 64; i++) {
104                  if(intra_matrix[i] != matrix[i])                  if(inter_matrix[i] != (uint16_t)def_inter_matrix[i])
105                          intra_matrix_changed = 1;                          return 1;
   
                 intra_matrix[i] = (int16_t) matrix[i];  
                 intra_matrix_fix[i] = FIX(intra_matrix[i]);  
106          }          }
107          return intra_matrix_changed;          return 0;
108  }  }
109    
110    void
111  uint8_t set_inter_matrix(uint8_t *matrix)  set_intra_matrix(uint16_t * mpeg_quant_matrices, const uint8_t * matrix)
112  {  {
113          int i;          int i;
114            uint16_t *intra_matrix = mpeg_quant_matrices + 0*64;
115    
116            for (i = 0; i < 64; i++) {
117                    intra_matrix[i] = (!i) ? (uint16_t)8: (uint16_t)matrix[i];
118            }
119    }
120    
121          inter_matrix_changed = 0;  void
122    init_intra_matrix(uint16_t * mpeg_quant_matrices, uint32_t quant)
123    {
124            int i;
125            uint16_t *intra_matrix = mpeg_quant_matrices + 0*64;
126            uint16_t *intra_matrix_rec = mpeg_quant_matrices + 1*64;
127    
128          for(i = 0; i < 64; i++) {          for(i = 0; i < 64; i++) {
129                  if(inter_matrix[i] != matrix[i])                  uint32_t div = intra_matrix[i]*quant;
130                          inter_matrix_changed = 1;                  intra_matrix_rec[i] = ((uint32_t)((1<<SCALEBITS) + (div>>1)))/div;
131            }
132    }
133    
134    void
135    set_inter_matrix(uint16_t * mpeg_quant_matrices, const uint8_t * matrix)
136    {
137            int i;
138            uint16_t *inter_matrix = mpeg_quant_matrices + 4*64;
139            uint16_t *inter_matrix1 = mpeg_quant_matrices + 5*64;
140            uint16_t *inter_matrix_fix = mpeg_quant_matrices + 6*64;
141            uint16_t *inter_matrix_fixl = mpeg_quant_matrices + 7*64;
142    
143                  inter_matrix[i] = (int16_t) matrix[i];          for (i = 0; i < 64; i++) {
144                    inter_matrix1[i] = ((inter_matrix[i] = (int16_t) matrix[i])>>1);
145                    inter_matrix1[i] += ((inter_matrix[i] == 1) ? 1: 0);
146                  inter_matrix_fix[i] = FIX(inter_matrix[i]);                  inter_matrix_fix[i] = FIX(inter_matrix[i]);
147                    inter_matrix_fixl[i] = FIXL(inter_matrix[i]);
148            }
149          }          }
150          return inter_matrix_changed;  
151    void
152    init_mpeg_matrix(uint16_t * mpeg_quant_matrices) {
153    
154            set_intra_matrix(mpeg_quant_matrices, default_intra_matrix);
155            set_inter_matrix(mpeg_quant_matrices, default_inter_matrix);
156  }  }
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