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1 : | edgomez | 1382 | /***************************************************************************** |
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 : | Isibaar | 1988 | * $Id$ |
24 : | edgomez | 1382 | * |
25 : | ****************************************************************************/ | ||
26 : | |||
27 : | Isibaar | 2177 | #include "../global.h" |
28 : | Isibaar | 4 | #include "quant_matrix.h" |
29 : | Isibaar | 3 | |
30 : | edgomez | 851 | #define FIX(X) (((X)==1) ? 0xFFFF : ((1UL << 16) / (X) + 1)) |
31 : | #define FIXL(X) ((1UL << 16) / (X) - 1) | ||
32 : | Isibaar | 3 | |
33 : | edgomez | 1382 | /***************************************************************************** |
34 : | * Default matrices | ||
35 : | ****************************************************************************/ | ||
36 : | Isibaar | 3 | |
37 : | edgomez | 1382 | static const uint8_t default_intra_matrix[64] = { |
38 : | 8, 17, 18, 19, 21, 23, 25, 27, | ||
39 : | edgomez | 195 | 17, 18, 19, 21, 23, 25, 27, 28, |
40 : | 20, 21, 22, 23, 24, 26, 28, 30, | ||
41 : | 21, 22, 23, 24, 26, 28, 30, 32, | ||
42 : | 22, 23, 24, 26, 28, 30, 32, 35, | ||
43 : | 23, 24, 26, 28, 30, 32, 35, 38, | ||
44 : | 25, 26, 28, 30, 32, 35, 38, 41, | ||
45 : | 27, 28, 30, 32, 35, 38, 41, 45 | ||
46 : | Isibaar | 20 | }; |
47 : | |||
48 : | edgomez | 1382 | static const uint8_t default_inter_matrix[64] = { |
49 : | edgomez | 195 | 16, 17, 18, 19, 20, 21, 22, 23, |
50 : | 17, 18, 19, 20, 21, 22, 23, 24, | ||
51 : | 18, 19, 20, 21, 22, 23, 24, 25, | ||
52 : | 19, 20, 21, 22, 23, 24, 26, 27, | ||
53 : | 20, 21, 22, 23, 25, 26, 27, 28, | ||
54 : | 21, 22, 23, 24, 26, 27, 28, 30, | ||
55 : | 22, 23, 24, 26, 27, 28, 30, 31, | ||
56 : | 23, 24, 25, 27, 28, 30, 31, 33 | ||
57 : | Isibaar | 20 | }; |
58 : | |||
59 : | edgomez | 1382 | const uint16_t * |
60 : | get_intra_matrix(const uint16_t * mpeg_quant_matrices) | ||
61 : | edgomez | 195 | { |
62 : | edgomez | 1382 | return(mpeg_quant_matrices + 0*64); |
63 : | Isibaar | 4 | } |
64 : | |||
65 : | edgomez | 1382 | const uint16_t * |
66 : | get_inter_matrix(const uint16_t * mpeg_quant_matrices) | ||
67 : | edgomez | 195 | { |
68 : | edgomez | 1382 | return(mpeg_quant_matrices + 4*64); |
69 : | Isibaar | 4 | } |
70 : | |||
71 : | edgomez | 1382 | const uint8_t * |
72 : | get_default_intra_matrix(void) | ||
73 : | edgomez | 195 | { |
74 : | edgomez | 1382 | return default_intra_matrix; |
75 : | Isibaar | 4 | } |
76 : | |||
77 : | edgomez | 1382 | const uint8_t * |
78 : | get_default_inter_matrix(void) | ||
79 : | edgomez | 195 | { |
80 : | edgomez | 1382 | return default_inter_matrix; |
81 : | Isibaar | 4 | } |
82 : | |||
83 : | edgomez | 1382 | int |
84 : | is_custom_intra_matrix(const uint16_t * mpeg_quant_matrices) | ||
85 : | edgomez | 195 | { |
86 : | edgomez | 1382 | int i; |
87 : | const uint16_t *intra_matrix = get_intra_matrix(mpeg_quant_matrices); | ||
88 : | const uint8_t *def_intra_matrix = get_default_intra_matrix(); | ||
89 : | Isibaar | 4 | |
90 : | edgomez | 1382 | for (i = 0; i < 64; i++) { |
91 : | if(intra_matrix[i] != def_intra_matrix[i]) | ||
92 : | return 1; | ||
93 : | } | ||
94 : | return 0; | ||
95 : | Isibaar | 21 | } |
96 : | |||
97 : | edgomez | 1382 | int |
98 : | is_custom_inter_matrix(const uint16_t * mpeg_quant_matrices) | ||
99 : | edgomez | 195 | { |
100 : | edgomez | 1382 | int i; |
101 : | const uint16_t *inter_matrix = get_inter_matrix(mpeg_quant_matrices); | ||
102 : | const uint8_t *def_inter_matrix = get_default_inter_matrix(); | ||
103 : | Isibaar | 4 | |
104 : | edgomez | 1382 | for (i = 0; i < 64; i++) { |
105 : | if(inter_matrix[i] != (uint16_t)def_inter_matrix[i]) | ||
106 : | return 1; | ||
107 : | } | ||
108 : | return 0; | ||
109 : | Isibaar | 20 | } |
110 : | |||
111 : | edgomez | 1382 | void |
112 : | set_intra_matrix(uint16_t * mpeg_quant_matrices, const uint8_t * matrix) | ||
113 : | Isibaar | 3 | { |
114 : | edgomez | 1382 | int i; |
115 : | uint16_t *intra_matrix = mpeg_quant_matrices + 0*64; | ||
116 : | edgomez | 195 | |
117 : | for (i = 0; i < 64; i++) { | ||
118 : | Isibaar | 2177 | intra_matrix[i] = (!i) ? (uint16_t)8: (uint16_t)MAX(1, matrix[i]); |
119 : | Isibaar | 4 | } |
120 : | Isibaar | 3 | } |
121 : | |||
122 : | edgomez | 1382 | void |
123 : | syskin | 1713 | init_intra_matrix(uint16_t * mpeg_quant_matrices, uint32_t quant) |
124 : | { | ||
125 : | int i; | ||
126 : | uint16_t *intra_matrix = mpeg_quant_matrices + 0*64; | ||
127 : | uint16_t *intra_matrix_rec = mpeg_quant_matrices + 1*64; | ||
128 : | |||
129 : | for (i = 0; i < 64; i++) { | ||
130 : | uint32_t div = intra_matrix[i]*quant; | ||
131 : | Isibaar | 1795 | intra_matrix_rec[i] = ((uint32_t)((1<<SCALEBITS) + (div>>1)))/div; |
132 : | syskin | 1713 | } |
133 : | } | ||
134 : | |||
135 : | void | ||
136 : | edgomez | 1382 | set_inter_matrix(uint16_t * mpeg_quant_matrices, const uint8_t * matrix) |
137 : | Isibaar | 3 | { |
138 : | edgomez | 1382 | int i; |
139 : | uint16_t *inter_matrix = mpeg_quant_matrices + 4*64; | ||
140 : | uint16_t *inter_matrix1 = mpeg_quant_matrices + 5*64; | ||
141 : | uint16_t *inter_matrix_fix = mpeg_quant_matrices + 6*64; | ||
142 : | uint16_t *inter_matrix_fixl = mpeg_quant_matrices + 7*64; | ||
143 : | edgomez | 195 | |
144 : | for (i = 0; i < 64; i++) { | ||
145 : | Isibaar | 2187 | inter_matrix1[i] = ((inter_matrix[i] = (int16_t)MAX(1, matrix[i]))>>1); |
146 : | edgomez | 851 | inter_matrix1[i] += ((inter_matrix[i] == 1) ? 1: 0); |
147 : | Isibaar | 1928 | inter_matrix_fix[i] = (uint16_t) FIX(inter_matrix[i]); |
148 : | inter_matrix_fixl[i] = (uint16_t) FIXL(inter_matrix[i]); | ||
149 : | Isibaar | 3 | } |
150 : | } | ||
151 : | edgomez | 1382 | |
152 : | void | ||
153 : | init_mpeg_matrix(uint16_t * mpeg_quant_matrices) { | ||
154 : | |||
155 : | set_intra_matrix(mpeg_quant_matrices, default_intra_matrix); | ||
156 : | set_inter_matrix(mpeg_quant_matrices, default_inter_matrix); | ||
157 : | } |
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