1/0 fix
[libav.git] / libavcodec / snow.c
1 /*
2 * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19 #include "avcodec.h"
20 #include "common.h"
21 #include "dsputil.h"
22 #include "cabac.h"
23
24 #include "mpegvideo.h"
25
26 #undef NDEBUG
27 #include <assert.h>
28
29 #define MAX_DECOMPOSITIONS 8
30 #define MAX_PLANES 4
31 #define DWTELEM int
32 #define QROOT 8
33
34 static const int8_t quant3[256]={
35 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
36 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
37 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
38 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
39 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
40 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
41 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
42 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
43 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
44 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
45 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
46 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
47 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
48 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
49 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
50 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, 0,
51 };
52 static const int8_t quant3b[256]={
53 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
54 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
55 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
56 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
57 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
58 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
59 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
60 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
61 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
62 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
63 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
64 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
65 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
66 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
67 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
68 -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
69 };
70 static const int8_t quant5[256]={
71 0, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
72 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
73 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
74 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
75 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
76 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
77 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
78 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
79 -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
80 -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
81 -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
82 -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
83 -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
84 -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
85 -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
86 -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,-1,-1,
87 };
88 static const int8_t quant7[256]={
89 0, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
90 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
91 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
92 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
93 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
94 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
95 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
96 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
97 -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
98 -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
99 -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
100 -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
101 -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
102 -3,-3,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-2,-2,-2,
103 -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
104 -2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,-1,
105 };
106 static const int8_t quant9[256]={
107 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3,
108 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
109 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
110 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
111 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
112 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
113 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
114 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
115 -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
116 -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
117 -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
118 -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
119 -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
120 -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
121 -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3,
122 -3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-1,-1,
123 };
124 static const int8_t quant11[256]={
125 0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4,
126 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
127 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
128 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
129 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
130 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
131 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
132 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
133 -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
134 -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
135 -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
136 -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
137 -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
138 -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-4,-4,
139 -4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
140 -4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-1,
141 };
142 static const int8_t quant13[256]={
143 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
144 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
145 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
146 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
147 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
148 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
149 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
150 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
151 -6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
152 -6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
153 -6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
154 -6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
155 -6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-5,
156 -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
157 -5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
158 -4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3,-2,-2,-1,
159 };
160
161 #define OBMC_MAX 64
162 #if 0 //64*cubic
163 static const uint8_t obmc32[1024]={
164 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
165 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
166 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 0, 0, 0,
167 0, 0, 1, 1, 2, 2, 3, 4, 4, 5, 6, 6, 7, 7, 8, 8, 8, 8, 7, 7, 6, 6, 5, 4, 4, 3, 2, 2, 1, 1, 0, 0,
168 0, 0, 1, 2, 2, 3, 4, 6, 7, 8, 9,10,11,12,12,12,12,12,12,11,10, 9, 8, 7, 6, 4, 3, 2, 2, 1, 0, 0,
169 0, 1, 1, 2, 3, 5, 6, 8,10,11,13,14,15,16,17,18,18,17,16,15,14,13,11,10, 8, 6, 5, 3, 2, 1, 1, 0,
170 0, 1, 1, 3, 4, 6, 8,10,13,15,17,19,20,22,22,23,23,22,22,20,19,17,15,13,10, 8, 6, 4, 3, 1, 1, 0,
171 0, 1, 2, 4, 6, 8,10,13,16,19,21,23,25,27,28,29,29,28,27,25,23,21,19,16,13,10, 8, 6, 4, 2, 1, 0,
172 0, 1, 2, 4, 7,10,13,16,19,22,25,28,31,33,34,35,35,34,33,31,28,25,22,19,16,13,10, 7, 4, 2, 1, 0,
173 0, 1, 3, 5, 8,11,15,19,22,26,30,33,36,38,40,41,41,40,38,36,33,30,26,22,19,15,11, 8, 5, 3, 1, 0,
174 0, 1, 3, 6, 9,12,17,21,25,30,34,38,41,44,45,46,46,45,44,41,38,34,30,25,21,17,12, 9, 6, 3, 1, 0,
175 0, 1, 3, 6,10,14,19,23,28,33,38,42,45,48,51,52,52,51,48,45,42,38,33,28,23,19,14,10, 6, 3, 1, 0,
176 0, 1, 4, 7,11,15,20,25,31,36,41,45,49,52,55,56,56,55,52,49,45,41,36,31,25,20,15,11, 7, 4, 1, 0,
177 0, 2, 4, 7,12,16,22,27,33,38,44,48,52,56,58,60,60,58,56,52,48,44,38,33,27,22,16,12, 7, 4, 2, 0,
178 0, 1, 4, 8,12,17,22,28,34,40,45,51,55,58,61,62,62,61,58,55,51,45,40,34,28,22,17,12, 8, 4, 1, 0,
179 0, 2, 4, 8,12,18,23,29,35,41,46,52,56,60,62,64,64,62,60,56,52,46,41,35,29,23,18,12, 8, 4, 2, 0,
180 0, 2, 4, 8,12,18,23,29,35,41,46,52,56,60,62,64,64,62,60,56,52,46,41,35,29,23,18,12, 8, 4, 2, 0,
181 0, 1, 4, 8,12,17,22,28,34,40,45,51,55,58,61,62,62,61,58,55,51,45,40,34,28,22,17,12, 8, 4, 1, 0,
182 0, 2, 4, 7,12,16,22,27,33,38,44,48,52,56,58,60,60,58,56,52,48,44,38,33,27,22,16,12, 7, 4, 2, 0,
183 0, 1, 4, 7,11,15,20,25,31,36,41,45,49,52,55,56,56,55,52,49,45,41,36,31,25,20,15,11, 7, 4, 1, 0,
184 0, 1, 3, 6,10,14,19,23,28,33,38,42,45,48,51,52,52,51,48,45,42,38,33,28,23,19,14,10, 6, 3, 1, 0,
185 0, 1, 3, 6, 9,12,17,21,25,30,34,38,41,44,45,46,46,45,44,41,38,34,30,25,21,17,12, 9, 6, 3, 1, 0,
186 0, 1, 3, 5, 8,11,15,19,22,26,30,33,36,38,40,41,41,40,38,36,33,30,26,22,19,15,11, 8, 5, 3, 1, 0,
187 0, 1, 2, 4, 7,10,13,16,19,22,25,28,31,33,34,35,35,34,33,31,28,25,22,19,16,13,10, 7, 4, 2, 1, 0,
188 0, 1, 2, 4, 6, 8,10,13,16,19,21,23,25,27,28,29,29,28,27,25,23,21,19,16,13,10, 8, 6, 4, 2, 1, 0,
189 0, 1, 1, 3, 4, 6, 8,10,13,15,17,19,20,22,22,23,23,22,22,20,19,17,15,13,10, 8, 6, 4, 3, 1, 1, 0,
190 0, 1, 1, 2, 3, 5, 6, 8,10,11,13,14,15,16,17,18,18,17,16,15,14,13,11,10, 8, 6, 5, 3, 2, 1, 1, 0,
191 0, 0, 1, 2, 2, 3, 4, 6, 7, 8, 9,10,11,12,12,12,12,12,12,11,10, 9, 8, 7, 6, 4, 3, 2, 2, 1, 0, 0,
192 0, 0, 1, 1, 2, 2, 3, 4, 4, 5, 6, 6, 7, 7, 8, 8, 8, 8, 7, 7, 6, 6, 5, 4, 4, 3, 2, 2, 1, 1, 0, 0,
193 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 0, 0, 0,
194 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
195 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
196 //error:0.000022
197 };
198 static const uint8_t obmc16[256]={
199 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
200 0, 1, 1, 2, 4, 5, 5, 6, 6, 5, 5, 4, 2, 1, 1, 0,
201 0, 1, 4, 6, 9,11,13,15,15,13,11, 9, 6, 4, 1, 0,
202 0, 2, 6,11,15,20,24,26,26,24,20,15,11, 6, 2, 0,
203 0, 4, 9,15,23,29,34,38,38,34,29,23,15, 9, 4, 0,
204 0, 5,11,20,29,38,45,49,49,45,38,29,20,11, 5, 0,
205 1, 5,13,24,34,45,53,57,57,53,45,34,24,13, 5, 1,
206 1, 6,15,26,38,49,57,62,62,57,49,38,26,15, 6, 1,
207 1, 6,15,26,38,49,57,62,62,57,49,38,26,15, 6, 1,
208 1, 5,13,24,34,45,53,57,57,53,45,34,24,13, 5, 1,
209 0, 5,11,20,29,38,45,49,49,45,38,29,20,11, 5, 0,
210 0, 4, 9,15,23,29,34,38,38,34,29,23,15, 9, 4, 0,
211 0, 2, 6,11,15,20,24,26,26,24,20,15,11, 6, 2, 0,
212 0, 1, 4, 6, 9,11,13,15,15,13,11, 9, 6, 4, 1, 0,
213 0, 1, 1, 2, 4, 5, 5, 6, 6, 5, 5, 4, 2, 1, 1, 0,
214 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
215 //error:0.000033
216 };
217 #elif 1 // 64*linear
218 static const uint8_t obmc32[1024]={
219 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0,
220 0, 1, 1, 1, 2, 2, 2, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 0,
221 0, 1, 2, 2, 3, 3, 4, 5, 5, 6, 7, 7, 8, 8, 9,10,10, 9, 8, 8, 7, 7, 6, 5, 5, 4, 3, 3, 2, 2, 1, 0,
222 0, 1, 2, 3, 4, 5, 6, 7, 7, 8, 9,10,11,12,13,14,14,13,12,11,10, 9, 8, 7, 7, 6, 5, 4, 3, 2, 1, 0,
223 1, 2, 3, 4, 5, 6, 7, 8,10,11,12,13,14,15,16,17,17,16,15,14,13,12,11,10, 8, 7, 6, 5, 4, 3, 2, 1,
224 1, 2, 3, 5, 6, 8, 9,10,12,13,14,16,17,19,20,21,21,20,19,17,16,14,13,12,10, 9, 8, 6, 5, 3, 2, 1,
225 1, 2, 4, 6, 7, 9,11,12,14,15,17,19,20,22,24,25,25,24,22,20,19,17,15,14,12,11, 9, 7, 6, 4, 2, 1,
226 1, 3, 5, 7, 8,10,12,14,16,18,20,22,23,25,27,29,29,27,25,23,22,20,18,16,14,12,10, 8, 7, 5, 3, 1,
227 1, 3, 5, 7,10,12,14,16,18,20,22,24,27,29,31,33,33,31,29,27,24,22,20,18,16,14,12,10, 7, 5, 3, 1,
228 1, 4, 6, 8,11,13,15,18,20,23,25,27,30,32,34,37,37,34,32,30,27,25,23,20,18,15,13,11, 8, 6, 4, 1,
229 1, 4, 7, 9,12,14,17,20,22,25,28,30,33,35,38,41,41,38,35,33,30,28,25,22,20,17,14,12, 9, 7, 4, 1,
230 1, 4, 7,10,13,16,19,22,24,27,30,33,36,39,42,45,45,42,39,36,33,30,27,24,22,19,16,13,10, 7, 4, 1,
231 2, 5, 8,11,14,17,20,23,27,30,33,36,39,42,45,48,48,45,42,39,36,33,30,27,23,20,17,14,11, 8, 5, 2,
232 2, 5, 8,12,15,19,22,25,29,32,35,39,42,46,49,52,52,49,46,42,39,35,32,29,25,22,19,15,12, 8, 5, 2,
233 2, 5, 9,13,16,20,24,27,31,34,38,42,45,49,53,56,56,53,49,45,42,38,34,31,27,24,20,16,13, 9, 5, 2,
234 2, 6,10,14,17,21,25,29,33,37,41,45,48,52,56,60,60,56,52,48,45,41,37,33,29,25,21,17,14,10, 6, 2,
235 2, 6,10,14,17,21,25,29,33,37,41,45,48,52,56,60,60,56,52,48,45,41,37,33,29,25,21,17,14,10, 6, 2,
236 2, 5, 9,13,16,20,24,27,31,34,38,42,45,49,53,56,56,53,49,45,42,38,34,31,27,24,20,16,13, 9, 5, 2,
237 2, 5, 8,12,15,19,22,25,29,32,35,39,42,46,49,52,52,49,46,42,39,35,32,29,25,22,19,15,12, 8, 5, 2,
238 2, 5, 8,11,14,17,20,23,27,30,33,36,39,42,45,48,48,45,42,39,36,33,30,27,23,20,17,14,11, 8, 5, 2,
239 1, 4, 7,10,13,16,19,22,24,27,30,33,36,39,42,45,45,42,39,36,33,30,27,24,22,19,16,13,10, 7, 4, 1,
240 1, 4, 7, 9,12,14,17,20,22,25,28,30,33,35,38,41,41,38,35,33,30,28,25,22,20,17,14,12, 9, 7, 4, 1,
241 1, 4, 6, 8,11,13,15,18,20,23,25,27,30,32,34,37,37,34,32,30,27,25,23,20,18,15,13,11, 8, 6, 4, 1,
242 1, 3, 5, 7,10,12,14,16,18,20,22,24,27,29,31,33,33,31,29,27,24,22,20,18,16,14,12,10, 7, 5, 3, 1,
243 1, 3, 5, 7, 8,10,12,14,16,18,20,22,23,25,27,29,29,27,25,23,22,20,18,16,14,12,10, 8, 7, 5, 3, 1,
244 1, 2, 4, 6, 7, 9,11,12,14,15,17,19,20,22,24,25,25,24,22,20,19,17,15,14,12,11, 9, 7, 6, 4, 2, 1,
245 1, 2, 3, 5, 6, 8, 9,10,12,13,14,16,17,19,20,21,21,20,19,17,16,14,13,12,10, 9, 8, 6, 5, 3, 2, 1,
246 1, 2, 3, 4, 5, 6, 7, 8,10,11,12,13,14,15,16,17,17,16,15,14,13,12,11,10, 8, 7, 6, 5, 4, 3, 2, 1,
247 0, 1, 2, 3, 4, 5, 6, 7, 7, 8, 9,10,11,12,13,14,14,13,12,11,10, 9, 8, 7, 7, 6, 5, 4, 3, 2, 1, 0,
248 0, 1, 2, 2, 3, 3, 4, 5, 5, 6, 7, 7, 8, 8, 9,10,10, 9, 8, 8, 7, 7, 6, 5, 5, 4, 3, 3, 2, 2, 1, 0,
249 0, 1, 1, 1, 2, 2, 2, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 0,
250 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0,
251 //error:0.000020
252 };
253 static const uint8_t obmc16[256]={
254 0, 1, 1, 2, 2, 3, 3, 4, 4, 3, 3, 2, 2, 1, 1, 0,
255 1, 2, 4, 5, 7, 8,10,11,11,10, 8, 7, 5, 4, 2, 1,
256 1, 4, 6, 9,11,14,16,19,19,16,14,11, 9, 6, 4, 1,
257 2, 5, 9,12,16,19,23,26,26,23,19,16,12, 9, 5, 2,
258 2, 7,11,16,20,25,29,34,34,29,25,20,16,11, 7, 2,
259 3, 8,14,19,25,30,36,41,41,36,30,25,19,14, 8, 3,
260 3,10,16,23,29,36,42,49,49,42,36,29,23,16,10, 3,
261 4,11,19,26,34,41,49,56,56,49,41,34,26,19,11, 4,
262 4,11,19,26,34,41,49,56,56,49,41,34,26,19,11, 4,
263 3,10,16,23,29,36,42,49,49,42,36,29,23,16,10, 3,
264 3, 8,14,19,25,30,36,41,41,36,30,25,19,14, 8, 3,
265 2, 7,11,16,20,25,29,34,34,29,25,20,16,11, 7, 2,
266 2, 5, 9,12,16,19,23,26,26,23,19,16,12, 9, 5, 2,
267 1, 4, 6, 9,11,14,16,19,19,16,14,11, 9, 6, 4, 1,
268 1, 2, 4, 5, 7, 8,10,11,11,10, 8, 7, 5, 4, 2, 1,
269 0, 1, 1, 2, 2, 3, 3, 4, 4, 3, 3, 2, 2, 1, 1, 0,
270 //error:0.000015
271 };
272 #else //64*cos
273 static const uint8_t obmc32[1024]={
274 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
275 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
276 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 0, 0, 0,
277 0, 0, 1, 1, 1, 2, 2, 3, 4, 5, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 0, 0,
278 0, 0, 1, 1, 2, 3, 4, 5, 6, 7, 9,10,11,11,12,12,12,12,11,11,10, 9, 7, 6, 5, 4, 3, 2, 1, 1, 0, 0,
279 0, 0, 1, 2, 3, 5, 6, 8, 9,11,12,14,15,16,17,17,17,17,16,15,14,12,11, 9, 8, 6, 5, 3, 2, 1, 0, 0,
280 0, 1, 1, 2, 4, 6, 8,10,12,15,17,19,20,21,22,23,23,22,21,20,19,17,15,12,10, 8, 6, 4, 2, 1, 1, 0,
281 0, 1, 2, 3, 5, 8,10,13,16,19,21,24,26,27,28,29,29,28,27,26,24,21,19,16,13,10, 8, 5, 3, 2, 1, 0,
282 0, 1, 2, 4, 6, 9,12,16,19,23,26,29,31,33,34,35,35,34,33,31,29,26,23,19,16,12, 9, 6, 4, 2, 1, 0,
283 0, 1, 3, 5, 7,11,15,19,23,26,30,34,37,39,40,41,41,40,39,37,34,30,26,23,19,15,11, 7, 5, 3, 1, 0,
284 0, 1, 3, 5, 9,12,17,21,26,30,35,38,42,44,46,47,47,46,44,42,38,35,30,26,21,17,12, 9, 5, 3, 1, 0,
285 0, 1, 3, 6, 9,14,19,24,29,34,38,43,46,49,51,52,52,51,49,46,43,38,34,29,24,19,14, 9, 6, 3, 1, 0,
286 0, 1, 3, 6,11,15,20,26,31,37,42,46,50,53,56,57,57,56,53,50,46,42,37,31,26,20,15,11, 6, 3, 1, 0,
287 0, 1, 3, 7,11,16,21,27,33,39,44,49,53,57,59,60,60,59,57,53,49,44,39,33,27,21,16,11, 7, 3, 1, 0,
288 0, 1, 4, 7,12,17,22,28,34,40,46,51,56,59,61,63,63,61,59,56,51,46,40,34,28,22,17,12, 7, 4, 1, 0,
289 0, 1, 4, 7,12,17,23,29,35,41,47,52,57,60,63,64,64,63,60,57,52,47,41,35,29,23,17,12, 7, 4, 1, 0,
290 0, 1, 4, 7,12,17,23,29,35,41,47,52,57,60,63,64,64,63,60,57,52,47,41,35,29,23,17,12, 7, 4, 1, 0,
291 0, 1, 4, 7,12,17,22,28,34,40,46,51,56,59,61,63,63,61,59,56,51,46,40,34,28,22,17,12, 7, 4, 1, 0,
292 0, 1, 3, 7,11,16,21,27,33,39,44,49,53,57,59,60,60,59,57,53,49,44,39,33,27,21,16,11, 7, 3, 1, 0,
293 0, 1, 3, 6,11,15,20,26,31,37,42,46,50,53,56,57,57,56,53,50,46,42,37,31,26,20,15,11, 6, 3, 1, 0,
294 0, 1, 3, 6, 9,14,19,24,29,34,38,43,46,49,51,52,52,51,49,46,43,38,34,29,24,19,14, 9, 6, 3, 1, 0,
295 0, 1, 3, 5, 9,12,17,21,26,30,35,38,42,44,46,47,47,46,44,42,38,35,30,26,21,17,12, 9, 5, 3, 1, 0,
296 0, 1, 3, 5, 7,11,15,19,23,26,30,34,37,39,40,41,41,40,39,37,34,30,26,23,19,15,11, 7, 5, 3, 1, 0,
297 0, 1, 2, 4, 6, 9,12,16,19,23,26,29,31,33,34,35,35,34,33,31,29,26,23,19,16,12, 9, 6, 4, 2, 1, 0,
298 0, 1, 2, 3, 5, 8,10,13,16,19,21,24,26,27,28,29,29,28,27,26,24,21,19,16,13,10, 8, 5, 3, 2, 1, 0,
299 0, 1, 1, 2, 4, 6, 8,10,12,15,17,19,20,21,22,23,23,22,21,20,19,17,15,12,10, 8, 6, 4, 2, 1, 1, 0,
300 0, 0, 1, 2, 3, 5, 6, 8, 9,11,12,14,15,16,17,17,17,17,16,15,14,12,11, 9, 8, 6, 5, 3, 2, 1, 0, 0,
301 0, 0, 1, 1, 2, 3, 4, 5, 6, 7, 9,10,11,11,12,12,12,12,11,11,10, 9, 7, 6, 5, 4, 3, 2, 1, 1, 0, 0,
302 0, 0, 1, 1, 1, 2, 2, 3, 4, 5, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 0, 0,
303 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 0, 0, 0,
304 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
305 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
306 //error:0.000022
307 };
308 static const uint8_t obmc16[256]={
309 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
310 0, 0, 1, 2, 3, 4, 5, 5, 5, 5, 4, 3, 2, 1, 0, 0,
311 0, 1, 3, 6, 8,11,13,14,14,13,11, 8, 6, 3, 1, 0,
312 0, 2, 6,10,15,20,24,26,26,24,20,15,10, 6, 2, 0,
313 0, 3, 8,16,23,30,35,38,38,35,30,23,16, 8, 3, 0,
314 1, 4,11,20,30,39,46,49,49,46,39,30,20,11, 4, 1,
315 1, 5,13,24,35,46,54,58,58,54,46,35,24,13, 5, 1,
316 0, 5,14,26,38,49,58,63,63,58,49,38,26,14, 5, 0,
317 0, 5,14,26,38,49,58,63,63,58,49,38,26,14, 5, 0,
318 1, 5,13,24,35,46,54,58,58,54,46,35,24,13, 5, 1,
319 1, 4,11,20,30,39,46,49,49,46,39,30,20,11, 4, 1,
320 0, 3, 8,16,23,30,35,38,38,35,30,23,16, 8, 3, 0,
321 0, 2, 6,10,15,20,24,26,26,24,20,15,10, 6, 2, 0,
322 0, 1, 3, 6, 8,11,13,14,14,13,11, 8, 6, 3, 1, 0,
323 0, 0, 1, 2, 3, 4, 5, 5, 5, 5, 4, 3, 2, 1, 0, 0,
324 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0,
325 //error:0.000022
326 };
327 #endif
328
329
330 typedef struct SubBand{
331 int level;
332 int stride;
333 int width;
334 int height;
335 int qlog; ///< log(qscale)/log[2^(1/6)]
336 DWTELEM *buf;
337 struct SubBand *parent;
338 uint8_t state[/*7*2*/ 7 + 512][32];
339 }SubBand;
340
341 typedef struct Plane{
342 int width;
343 int height;
344 SubBand band[MAX_DECOMPOSITIONS][4];
345 }Plane;
346
347 typedef struct SnowContext{
348 // MpegEncContext m; // needed for motion estimation, should not be used for anything else, the idea is to make the motion estimation eventually independant of MpegEncContext, so this will be removed then (FIXME/XXX)
349
350 AVCodecContext *avctx;
351 CABACContext c;
352 DSPContext dsp;
353 AVFrame input_picture;
354 AVFrame current_picture;
355 AVFrame last_picture;
356 AVFrame mconly_picture;
357 // uint8_t q_context[16];
358 uint8_t header_state[32];
359 int keyframe;
360 int version;
361 int spatial_decomposition_type;
362 int temporal_decomposition_type;
363 int spatial_decomposition_count;
364 int temporal_decomposition_count;
365 DWTELEM *spatial_dwt_buffer;
366 DWTELEM *pred_buffer;
367 int colorspace_type;
368 int chroma_h_shift;
369 int chroma_v_shift;
370 int spatial_scalability;
371 int qlog;
372 int mv_scale;
373 int qbias;
374 #define QBIAS_SHIFT 3
375 int b_width; //FIXME remove?
376 int b_height; //FIXME remove?
377 Plane plane[MAX_PLANES];
378 SubBand mb_band;
379 SubBand mv_band[2];
380
381 uint16_t *mb_type;
382 uint8_t *mb_mean;
383 uint32_t *dummy;
384 int16_t (*motion_val8)[2];
385 int16_t (*motion_val16)[2];
386 MpegEncContext m; // needed for motion estimation, should not be used for anything else, the idea is to make the motion estimation eventually independant of MpegEncContext, so this will be removed then (FIXME/XXX)
387 }SnowContext;
388
389 #define QEXPSHIFT 7 //FIXME try to change this to 0
390 static const uint8_t qexp[8]={
391 128, 140, 152, 166, 181, 197, 215, 235
392 // 64, 70, 76, 83, 91, 99, 108, 117
393 // 32, 35, 38, 41, 45, 49, 54, 59
394 // 16, 17, 19, 21, 23, 25, 27, 29
395 // 8, 9, 10, 10, 11, 12, 13, 15
396 };
397
398 static inline int mirror(int v, int m){
399 if (v<0) return -v;
400 else if(v>m) return 2*m-v;
401 else return v;
402 }
403
404 static inline void put_symbol(CABACContext *c, uint8_t *state, int v, int is_signed){
405 int i;
406
407 if(v){
408 const int a= ABS(v);
409 const int e= av_log2(a);
410 #if 1
411 const int el= FFMIN(e, 10);
412 put_cabac(c, state+0, 0);
413
414 for(i=0; i<el; i++){
415 put_cabac(c, state+1+i, 1); //1..10
416 }
417 for(; i<e; i++){
418 put_cabac(c, state+1+9, 1); //1..10
419 }
420 put_cabac(c, state+1+FFMIN(i,9), 0);
421
422 for(i=e-1; i>=el; i--){
423 put_cabac(c, state+22+9, (a>>i)&1); //22..31
424 }
425 for(; i>=0; i--){
426 put_cabac(c, state+22+i, (a>>i)&1); //22..31
427 }
428
429 if(is_signed)
430 put_cabac(c, state+11 + el, v < 0); //11..21
431 #else
432
433 put_cabac(c, state+0, 0);
434 if(e<=9){
435 for(i=0; i<e; i++){
436 put_cabac(c, state+1+i, 1); //1..10
437 }
438 put_cabac(c, state+1+i, 0);
439
440 for(i=e-1; i>=0; i--){
441 put_cabac(c, state+22+i, (a>>i)&1); //22..31
442 }
443
444 if(is_signed)
445 put_cabac(c, state+11 + e, v < 0); //11..21
446 }else{
447 for(i=0; i<e; i++){
448 put_cabac(c, state+1+FFMIN(i,9), 1); //1..10
449 }
450 put_cabac(c, state+1+FFMIN(i,9), 0);
451
452 for(i=e-1; i>=0; i--){
453 put_cabac(c, state+22+FFMIN(i,9), (a>>i)&1); //22..31
454 }
455
456 if(is_signed)
457 put_cabac(c, state+11 + FFMIN(e,10), v < 0); //11..21
458 }
459 #endif
460 }else{
461 put_cabac(c, state+0, 1);
462 }
463 }
464
465 static inline int get_symbol(CABACContext *c, uint8_t *state, int is_signed){
466 if(get_cabac(c, state+0))
467 return 0;
468 else{
469 int i, e, a, el;
470 //FIXME try to merge loops with FFMIN() maybe they are equally fast and they are surly cuter
471 for(e=0; e<10; e++){
472 if(get_cabac(c, state + 1 + e)==0) // 1..10
473 break;
474 }
475 el= e;
476
477 if(e==10){
478 while(get_cabac(c, state + 1 + 9)) //10
479 e++;
480 }
481 a= 1;
482 for(i=e-1; i>=el; i--){
483 a += a + get_cabac(c, state+22+9); //31
484 }
485 for(; i>=0; i--){
486 a += a + get_cabac(c, state+22+i); //22..31
487 }
488
489 if(is_signed && get_cabac(c, state+11 + el)) //11..21
490 return -a;
491 else
492 return a;
493 }
494 }
495
496 static always_inline void lift(DWTELEM *dst, DWTELEM *src, DWTELEM *ref, int dst_step, int src_step, int ref_step, int width, int mul, int add, int shift, int highpass, int inverse){
497 const int mirror_left= !highpass;
498 const int mirror_right= (width&1) ^ highpass;
499 const int w= (width>>1) - 1 + (highpass & width);
500 int i;
501
502 #define LIFT(src, ref, inv) ((src) + ((inv) ? - (ref) : + (ref)))
503 if(mirror_left){
504 dst[0] = LIFT(src[0], ((mul*2*ref[0]+add)>>shift), inverse);
505 dst += dst_step;
506 src += src_step;
507 }
508
509 for(i=0; i<w; i++){
510 dst[i*dst_step] = LIFT(src[i*src_step], ((mul*(ref[i*ref_step] + ref[(i+1)*ref_step])+add)>>shift), inverse);
511 }
512
513 if(mirror_right){
514 dst[w*dst_step] = LIFT(src[w*src_step], ((mul*2*ref[w*ref_step]+add)>>shift), inverse);
515 }
516 }
517
518 static always_inline void lift5(DWTELEM *dst, DWTELEM *src, DWTELEM *ref, int dst_step, int src_step, int ref_step, int width, int mul, int add, int shift, int highpass, int inverse){
519 const int mirror_left= !highpass;
520 const int mirror_right= (width&1) ^ highpass;
521 const int w= (width>>1) - 1 + (highpass & width);
522 int i;
523
524 if(mirror_left){
525 int r= 3*2*ref[0];
526 r += r>>4;
527 r += r>>8;
528 dst[0] = LIFT(src[0], ((r+add)>>shift), inverse);
529 dst += dst_step;
530 src += src_step;
531 }
532
533 for(i=0; i<w; i++){
534 int r= 3*(ref[i*ref_step] + ref[(i+1)*ref_step]);
535 r += r>>4;
536 r += r>>8;
537 dst[i*dst_step] = LIFT(src[i*src_step], ((r+add)>>shift), inverse);
538 }
539
540 if(mirror_right){
541 int r= 3*2*ref[w*ref_step];
542 r += r>>4;
543 r += r>>8;
544 dst[w*dst_step] = LIFT(src[w*src_step], ((r+add)>>shift), inverse);
545 }
546 }
547
548
549 static void inplace_lift(int *dst, int width, int *coeffs, int n, int shift, int start, int inverse){
550 int x, i;
551
552 for(x=start; x<width; x+=2){
553 int64_t sum=0;
554
555 for(i=0; i<n; i++){
556 int x2= x + 2*i - n + 1;
557 if (x2< 0) x2= -x2;
558 else if(x2>=width) x2= 2*width-x2-2;
559 sum += coeffs[i]*(int64_t)dst[x2];
560 }
561 if(inverse) dst[x] -= (sum + (1<<shift)/2)>>shift;
562 else dst[x] += (sum + (1<<shift)/2)>>shift;
563 }
564 }
565
566 static void inplace_liftV(int *dst, int width, int height, int stride, int *coeffs, int n, int shift, int start, int inverse){
567 int x, y, i;
568 for(y=start; y<height; y+=2){
569 for(x=0; x<width; x++){
570 int64_t sum=0;
571
572 for(i=0; i<n; i++){
573 int y2= y + 2*i - n + 1;
574 if (y2< 0) y2= -y2;
575 else if(y2>=height) y2= 2*height-y2-2;
576 sum += coeffs[i]*(int64_t)dst[x + y2*stride];
577 }
578 if(inverse) dst[x + y*stride] -= (sum + (1<<shift)/2)>>shift;
579 else dst[x + y*stride] += (sum + (1<<shift)/2)>>shift;
580 }
581 }
582 }
583
584 #define SCALEX 1
585 #define LX0 0
586 #define LX1 1
587
588 #if 0 // more accurate 9/7
589 #define N1 2
590 #define SHIFT1 14
591 #define COEFFS1 (int[]){-25987,-25987}
592 #define N2 2
593 #define SHIFT2 19
594 #define COEFFS2 (int[]){-27777,-27777}
595 #define N3 2
596 #define SHIFT3 15
597 #define COEFFS3 (int[]){28931,28931}
598 #define N4 2
599 #define SHIFT4 15
600 #define COEFFS4 (int[]){14533,14533}
601 #elif 1 // 13/7 CRF
602 #define N1 4
603 #define SHIFT1 4
604 #define COEFFS1 (int[]){1,-9,-9,1}
605 #define N2 4
606 #define SHIFT2 4
607 #define COEFFS2 (int[]){-1,5,5,-1}
608 #define N3 0
609 #define SHIFT3 1
610 #define COEFFS3 NULL
611 #define N4 0
612 #define SHIFT4 1
613 #define COEFFS4 NULL
614 #elif 1 // 3/5
615 #define LX0 1
616 #define LX1 0
617 #define SCALEX 0.5
618 #define N1 2
619 #define SHIFT1 1
620 #define COEFFS1 (int[]){1,1}
621 #define N2 2
622 #define SHIFT2 2
623 #define COEFFS2 (int[]){-1,-1}
624 #define N3 0
625 #define SHIFT3 0
626 #define COEFFS3 NULL
627 #define N4 0
628 #define SHIFT4 0
629 #define COEFFS4 NULL
630 #elif 1 // 11/5
631 #define N1 0
632 #define SHIFT1 1
633 #define COEFFS1 NULL
634 #define N2 2
635 #define SHIFT2 2
636 #define COEFFS2 (int[]){-1,-1}
637 #define N3 2
638 #define SHIFT3 0
639 #define COEFFS3 (int[]){-1,-1}
640 #define N4 4
641 #define SHIFT4 7
642 #define COEFFS4 (int[]){-5,29,29,-5}
643 #define SCALEX 4
644 #elif 1 // 9/7 CDF
645 #define N1 2
646 #define SHIFT1 7
647 #define COEFFS1 (int[]){-203,-203}
648 #define N2 2
649 #define SHIFT2 12
650 #define COEFFS2 (int[]){-217,-217}
651 #define N3 2
652 #define SHIFT3 7
653 #define COEFFS3 (int[]){113,113}
654 #define N4 2
655 #define SHIFT4 9
656 #define COEFFS4 (int[]){227,227}
657 #define SCALEX 1
658 #elif 1 // 7/5 CDF
659 #define N1 0
660 #define SHIFT1 1
661 #define COEFFS1 NULL
662 #define N2 2
663 #define SHIFT2 2
664 #define COEFFS2 (int[]){-1,-1}
665 #define N3 2
666 #define SHIFT3 0
667 #define COEFFS3 (int[]){-1,-1}
668 #define N4 2
669 #define SHIFT4 4
670 #define COEFFS4 (int[]){3,3}
671 #elif 1 // 9/7 MN
672 #define N1 4
673 #define SHIFT1 4
674 #define COEFFS1 (int[]){1,-9,-9,1}
675 #define N2 2
676 #define SHIFT2 2
677 #define COEFFS2 (int[]){1,1}
678 #define N3 0
679 #define SHIFT3 1
680 #define COEFFS3 NULL
681 #define N4 0
682 #define SHIFT4 1
683 #define COEFFS4 NULL
684 #else // 13/7 CRF
685 #define N1 4
686 #define SHIFT1 4
687 #define COEFFS1 (int[]){1,-9,-9,1}
688 #define N2 4
689 #define SHIFT2 4
690 #define COEFFS2 (int[]){-1,5,5,-1}
691 #define N3 0
692 #define SHIFT3 1
693 #define COEFFS3 NULL
694 #define N4 0
695 #define SHIFT4 1
696 #define COEFFS4 NULL
697 #endif
698 static void horizontal_decomposeX(int *b, int width){
699 int temp[width];
700 const int width2= width>>1;
701 const int w2= (width+1)>>1;
702 int A1,A2,A3,A4, x;
703
704 inplace_lift(b, width, COEFFS1, N1, SHIFT1, LX1, 0);
705 inplace_lift(b, width, COEFFS2, N2, SHIFT2, LX0, 0);
706 inplace_lift(b, width, COEFFS3, N3, SHIFT3, LX1, 0);
707 inplace_lift(b, width, COEFFS4, N4, SHIFT4, LX0, 0);
708
709 for(x=0; x<width2; x++){
710 temp[x ]= b[2*x ];
711 temp[x+w2]= b[2*x + 1];
712 }
713 if(width&1)
714 temp[x ]= b[2*x ];
715 memcpy(b, temp, width*sizeof(int));
716 }
717
718 static void horizontal_composeX(int *b, int width){
719 int temp[width];
720 const int width2= width>>1;
721 int A1,A2,A3,A4, x;
722 const int w2= (width+1)>>1;
723
724 memcpy(temp, b, width*sizeof(int));
725 for(x=0; x<width2; x++){
726 b[2*x ]= temp[x ];
727 b[2*x + 1]= temp[x+w2];
728 }
729 if(width&1)
730 b[2*x ]= temp[x ];
731
732 inplace_lift(b, width, COEFFS4, N4, SHIFT4, LX0, 1);
733 inplace_lift(b, width, COEFFS3, N3, SHIFT3, LX1, 1);
734 inplace_lift(b, width, COEFFS2, N2, SHIFT2, LX0, 1);
735 inplace_lift(b, width, COEFFS1, N1, SHIFT1, LX1, 1);
736 }
737
738 static void spatial_decomposeX(int *buffer, int width, int height, int stride){
739 int x, y;
740
741 for(y=0; y<height; y++){
742 for(x=0; x<width; x++){
743 buffer[y*stride + x] *= SCALEX;
744 }
745 }
746
747 for(y=0; y<height; y++){
748 horizontal_decomposeX(buffer + y*stride, width);
749 }
750
751 inplace_liftV(buffer, width, height, stride, COEFFS1, N1, SHIFT1, LX1, 0);
752 inplace_liftV(buffer, width, height, stride, COEFFS2, N2, SHIFT2, LX0, 0);
753 inplace_liftV(buffer, width, height, stride, COEFFS3, N3, SHIFT3, LX1, 0);
754 inplace_liftV(buffer, width, height, stride, COEFFS4, N4, SHIFT4, LX0, 0);
755 }
756
757 static void spatial_composeX(int *buffer, int width, int height, int stride){
758 int x, y;
759
760 inplace_liftV(buffer, width, height, stride, COEFFS4, N4, SHIFT4, LX0, 1);
761 inplace_liftV(buffer, width, height, stride, COEFFS3, N3, SHIFT3, LX1, 1);
762 inplace_liftV(buffer, width, height, stride, COEFFS2, N2, SHIFT2, LX0, 1);
763 inplace_liftV(buffer, width, height, stride, COEFFS1, N1, SHIFT1, LX1, 1);
764
765 for(y=0; y<height; y++){
766 horizontal_composeX(buffer + y*stride, width);
767 }
768
769 for(y=0; y<height; y++){
770 for(x=0; x<width; x++){
771 buffer[y*stride + x] /= SCALEX;
772 }
773 }
774 }
775
776 static void horizontal_decompose53i(int *b, int width){
777 int temp[width];
778 const int width2= width>>1;
779 int A1,A2,A3,A4, x;
780 const int w2= (width+1)>>1;
781
782 for(x=0; x<width2; x++){
783 temp[x ]= b[2*x ];
784 temp[x+w2]= b[2*x + 1];
785 }
786 if(width&1)
787 temp[x ]= b[2*x ];
788 #if 0
789 A2= temp[1 ];
790 A4= temp[0 ];
791 A1= temp[0+width2];
792 A1 -= (A2 + A4)>>1;
793 A4 += (A1 + 1)>>1;
794 b[0+width2] = A1;
795 b[0 ] = A4;
796 for(x=1; x+1<width2; x+=2){
797 A3= temp[x+width2];
798 A4= temp[x+1 ];
799 A3 -= (A2 + A4)>>1;
800 A2 += (A1 + A3 + 2)>>2;
801 b[x+width2] = A3;
802 b[x ] = A2;
803
804 A1= temp[x+1+width2];
805 A2= temp[x+2 ];
806 A1 -= (A2 + A4)>>1;
807 A4 += (A1 + A3 + 2)>>2;
808 b[x+1+width2] = A1;
809 b[x+1 ] = A4;
810 }
811 A3= temp[width-1];
812 A3 -= A2;
813 A2 += (A1 + A3 + 2)>>2;
814 b[width -1] = A3;
815 b[width2-1] = A2;
816 #else
817 lift(b+w2, temp+w2, temp, 1, 1, 1, width, -1, 0, 1, 1, 0);
818 lift(b , temp , b+w2, 1, 1, 1, width, 1, 2, 2, 0, 0);
819 #endif
820 }
821
822 static void vertical_decompose53iH0(int *b0, int *b1, int *b2, int width){
823 int i;
824
825 for(i=0; i<width; i++){
826 b1[i] -= (b0[i] + b2[i])>>1;
827 }
828 }
829
830 static void vertical_decompose53iL0(int *b0, int *b1, int *b2, int width){
831 int i;
832
833 for(i=0; i<width; i++){
834 b1[i] += (b0[i] + b2[i] + 2)>>2;
835 }
836 }
837
838 static void spatial_decompose53i(int *buffer, int width, int height, int stride){
839 int x, y;
840 DWTELEM *b0= buffer + mirror(-2-1, height-1)*stride;
841 DWTELEM *b1= buffer + mirror(-2 , height-1)*stride;
842
843 for(y=-2; y<height; y+=2){
844 DWTELEM *b2= buffer + mirror(y+1, height-1)*stride;
845 DWTELEM *b3= buffer + mirror(y+2, height-1)*stride;
846
847 {START_TIMER
848 if(b1 <= b3) horizontal_decompose53i(b2, width);
849 if(y+2 < height) horizontal_decompose53i(b3, width);
850 STOP_TIMER("horizontal_decompose53i")}
851
852 {START_TIMER
853 if(b1 <= b3) vertical_decompose53iH0(b1, b2, b3, width);
854 if(b0 <= b2) vertical_decompose53iL0(b0, b1, b2, width);
855 STOP_TIMER("vertical_decompose53i*")}
856
857 b0=b2;
858 b1=b3;
859 }
860 }
861
862 #define lift5 lift
863 #if 1
864 #define W_AM 3
865 #define W_AO 0
866 #define W_AS 1
867
868 #define W_BM 1
869 #define W_BO 8
870 #define W_BS 4
871
872 #undef lift5
873 #define W_CM 9999
874 #define W_CO 2
875 #define W_CS 2
876
877 #define W_DM 15
878 #define W_DO 16
879 #define W_DS 5
880 #elif 0
881 #define W_AM 55
882 #define W_AO 16
883 #define W_AS 5
884
885 #define W_BM 3
886 #define W_BO 32
887 #define W_BS 6
888
889 #define W_CM 127
890 #define W_CO 64
891 #define W_CS 7
892
893 #define W_DM 7
894 #define W_DO 8
895 #define W_DS 4
896 #elif 0
897 #define W_AM 97
898 #define W_AO 32
899 #define W_AS 6
900
901 #define W_BM 63
902 #define W_BO 512
903 #define W_BS 10
904
905 #define W_CM 13
906 #define W_CO 8
907 #define W_CS 4
908
909 #define W_DM 15
910 #define W_DO 16
911 #define W_DS 5
912
913 #else
914
915 #define W_AM 203
916 #define W_AO 64
917 #define W_AS 7
918
919 #define W_BM 217
920 #define W_BO 2048
921 #define W_BS 12
922
923 #define W_CM 113
924 #define W_CO 64
925 #define W_CS 7
926
927 #define W_DM 227
928 #define W_DO 128
929 #define W_DS 9
930 #endif
931 static void horizontal_decompose97i(int *b, int width){
932 int temp[width];
933 const int w2= (width+1)>>1;
934
935 lift (temp+w2, b +1, b , 1, 2, 2, width, -W_AM, W_AO, W_AS, 1, 0);
936 lift (temp , b , temp+w2, 1, 2, 1, width, -W_BM, W_BO, W_BS, 0, 0);
937 lift5(b +w2, temp+w2, temp , 1, 1, 1, width, W_CM, W_CO, W_CS, 1, 0);
938 lift (b , temp , b +w2, 1, 1, 1, width, W_DM, W_DO, W_DS, 0, 0);
939 }
940
941
942 static void vertical_decompose97iH0(int *b0, int *b1, int *b2, int width){
943 int i;
944
945 for(i=0; i<width; i++){
946 b1[i] -= (W_AM*(b0[i] + b2[i])+W_AO)>>W_AS;
947 }
948 }
949
950 static void vertical_decompose97iH1(int *b0, int *b1, int *b2, int width){
951 int i;
952
953 for(i=0; i<width; i++){
954 #ifdef lift5
955 b1[i] += (W_CM*(b0[i] + b2[i])+W_CO)>>W_CS;
956 #else
957 int r= 3*(b0[i] + b2[i]);
958 r+= r>>4;
959 r+= r>>8;
960 b1[i] += (r+W_CO)>>W_CS;
961 #endif
962 }
963 }
964
965 static void vertical_decompose97iL0(int *b0, int *b1, int *b2, int width){
966 int i;
967
968 for(i=0; i<width; i++){
969 b1[i] -= (W_BM*(b0[i] + b2[i])+W_BO)>>W_BS;
970 }
971 }
972
973 static void vertical_decompose97iL1(int *b0, int *b1, int *b2, int width){
974 int i;
975
976 for(i=0; i<width; i++){
977 b1[i] += (W_DM*(b0[i] + b2[i])+W_DO)>>W_DS;
978 }
979 }
980
981 static void spatial_decompose97i(int *buffer, int width, int height, int stride){
982 int x, y;
983 DWTELEM *b0= buffer + mirror(-4-1, height-1)*stride;
984 DWTELEM *b1= buffer + mirror(-4 , height-1)*stride;
985 DWTELEM *b2= buffer + mirror(-4+1, height-1)*stride;
986 DWTELEM *b3= buffer + mirror(-4+2, height-1)*stride;
987
988 for(y=-4; y<height; y+=2){
989 DWTELEM *b4= buffer + mirror(y+3, height-1)*stride;
990 DWTELEM *b5= buffer + mirror(y+4, height-1)*stride;
991
992 {START_TIMER
993 if(b3 <= b5) horizontal_decompose97i(b4, width);
994 if(y+4 < height) horizontal_decompose97i(b5, width);
995 if(width>400){
996 STOP_TIMER("horizontal_decompose97i")
997 }}
998
999 {START_TIMER
1000 if(b3 <= b5) vertical_decompose97iH0(b3, b4, b5, width);
1001 if(b2 <= b4) vertical_decompose97iL0(b2, b3, b4, width);
1002 if(b1 <= b3) vertical_decompose97iH1(b1, b2, b3, width);
1003 if(b0 <= b2) vertical_decompose97iL1(b0, b1, b2, width);
1004
1005 if(width>400){
1006 STOP_TIMER("vertical_decompose97i")
1007 }}
1008
1009 b0=b2;
1010 b1=b3;
1011 b2=b4;
1012 b3=b5;
1013 }
1014 }
1015
1016 static void spatial_dwt(SnowContext *s, int *buffer, int width, int height, int stride){
1017 int level;
1018
1019 for(level=0; level<s->spatial_decomposition_count; level++){
1020 switch(s->spatial_decomposition_type){
1021 case 0: spatial_decompose97i(buffer, width>>level, height>>level, stride<<level); break;
1022 case 1: spatial_decompose53i(buffer, width>>level, height>>level, stride<<level); break;
1023 case 2: spatial_decomposeX (buffer, width>>level, height>>level, stride<<level); break;
1024 }
1025 }
1026 }
1027
1028 static void horizontal_compose53i(int *b, int width){
1029 int temp[width];
1030 const int width2= width>>1;
1031 const int w2= (width+1)>>1;
1032 int A1,A2,A3,A4, x;
1033
1034 #if 0
1035 A2= temp[1 ];
1036 A4= temp[0 ];
1037 A1= temp[0+width2];
1038 A1 -= (A2 + A4)>>1;
1039 A4 += (A1 + 1)>>1;
1040 b[0+width2] = A1;
1041 b[0 ] = A4;
1042 for(x=1; x+1<width2; x+=2){
1043 A3= temp[x+width2];
1044 A4= temp[x+1 ];
1045 A3 -= (A2 + A4)>>1;
1046 A2 += (A1 + A3 + 2)>>2;
1047 b[x+width2] = A3;
1048 b[x ] = A2;
1049
1050 A1= temp[x+1+width2];
1051 A2= temp[x+2 ];
1052 A1 -= (A2 + A4)>>1;
1053 A4 += (A1 + A3 + 2)>>2;
1054 b[x+1+width2] = A1;
1055 b[x+1 ] = A4;
1056 }
1057 A3= temp[width-1];
1058 A3 -= A2;
1059 A2 += (A1 + A3 + 2)>>2;
1060 b[width -1] = A3;
1061 b[width2-1] = A2;
1062 #else
1063 lift(temp , b , b+w2, 1, 1, 1, width, 1, 2, 2, 0, 1);
1064 lift(temp+w2, b+w2, temp, 1, 1, 1, width, -1, 0, 1, 1, 1);
1065 #endif
1066 for(x=0; x<width2; x++){
1067 b[2*x ]= temp[x ];
1068 b[2*x + 1]= temp[x+w2];
1069 }
1070 if(width&1)
1071 b[2*x ]= temp[x ];
1072 }
1073
1074 static void vertical_compose53iH0(int *b0, int *b1, int *b2, int width){
1075 int i;
1076
1077 for(i=0; i<width; i++){
1078 b1[i] += (b0[i] + b2[i])>>1;
1079 }
1080 }
1081
1082 static void vertical_compose53iL0(int *b0, int *b1, int *b2, int width){
1083 int i;
1084
1085 for(i=0; i<width; i++){
1086 b1[i] -= (b0[i] + b2[i] + 2)>>2;
1087 }
1088 }
1089
1090 static void spatial_compose53i(int *buffer, int width, int height, int stride){
1091 int x, y;
1092 DWTELEM *b0= buffer + mirror(-1-1, height-1)*stride;
1093 DWTELEM *b1= buffer + mirror(-1 , height-1)*stride;
1094
1095 for(y=-1; y<=height; y+=2){
1096 DWTELEM *b2= buffer + mirror(y+1, height-1)*stride;
1097 DWTELEM *b3= buffer + mirror(y+2, height-1)*stride;
1098
1099 {START_TIMER
1100 if(b1 <= b3) vertical_compose53iL0(b1, b2, b3, width);
1101 if(b0 <= b2) vertical_compose53iH0(b0, b1, b2, width);
1102 STOP_TIMER("vertical_compose53i*")}
1103
1104 {START_TIMER
1105 if(y-1 >= 0) horizontal_compose53i(b0, width);
1106 if(b0 <= b2) horizontal_compose53i(b1, width);
1107 STOP_TIMER("horizontal_compose53i")}
1108
1109 b0=b2;
1110 b1=b3;
1111 }
1112 }
1113
1114
1115 static void horizontal_compose97i(int *b, int width){
1116 int temp[width];
1117 const int w2= (width+1)>>1;
1118
1119 lift (temp , b , b +w2, 1, 1, 1, width, W_DM, W_DO, W_DS, 0, 1);
1120 lift5(temp+w2, b +w2, temp , 1, 1, 1, width, W_CM, W_CO, W_CS, 1, 1);
1121 lift (b , temp , temp+w2, 2, 1, 1, width, -W_BM, W_BO, W_BS, 0, 1);
1122 lift (b+1 , temp+w2, b , 2, 1, 2, width, -W_AM, W_AO, W_AS, 1, 1);
1123 }
1124
1125 static void vertical_compose97iH0(int *b0, int *b1, int *b2, int width){
1126 int i;
1127
1128 for(i=0; i<width; i++){
1129 b1[i] += (W_AM*(b0[i] + b2[i])+W_AO)>>W_AS;
1130 }
1131 }
1132
1133 static void vertical_compose97iH1(int *b0, int *b1, int *b2, int width){
1134 int i;
1135
1136 for(i=0; i<width; i++){
1137 #ifdef lift5
1138 b1[i] -= (W_CM*(b0[i] + b2[i])+W_CO)>>W_CS;
1139 #else
1140 int r= 3*(b0[i] + b2[i]);
1141 r+= r>>4;
1142 r+= r>>8;
1143 b1[i] -= (r+W_CO)>>W_CS;
1144 #endif
1145 }
1146 }
1147
1148 static void vertical_compose97iL0(int *b0, int *b1, int *b2, int width){
1149 int i;
1150
1151 for(i=0; i<width; i++){
1152 b1[i] += (W_BM*(b0[i] + b2[i])+W_BO)>>W_BS;
1153 }
1154 }
1155
1156 static void vertical_compose97iL1(int *b0, int *b1, int *b2, int width){
1157 int i;
1158
1159 for(i=0; i<width; i++){
1160 b1[i] -= (W_DM*(b0[i] + b2[i])+W_DO)>>W_DS;
1161 }
1162 }
1163
1164 static void spatial_compose97i(int *buffer, int width, int height, int stride){
1165 int x, y;
1166 DWTELEM *b0= buffer + mirror(-3-1, height-1)*stride;
1167 DWTELEM *b1= buffer + mirror(-3 , height-1)*stride;
1168 DWTELEM *b2= buffer + mirror(-3+1, height-1)*stride;
1169 DWTELEM *b3= buffer + mirror(-3+2, height-1)*stride;
1170
1171 for(y=-3; y<=height; y+=2){
1172 DWTELEM *b4= buffer + mirror(y+3, height-1)*stride;
1173 DWTELEM *b5= buffer + mirror(y+4, height-1)*stride;
1174
1175 if(stride == width && y+4 < height && 0){
1176 int x;
1177 for(x=0; x<width/2; x++)
1178 b5[x] += 64*2;
1179 for(; x<width; x++)
1180 b5[x] += 169*2;
1181 }
1182
1183 {START_TIMER
1184 if(b3 <= b5) vertical_compose97iL1(b3, b4, b5, width);
1185 if(b2 <= b4) vertical_compose97iH1(b2, b3, b4, width);
1186 if(b1 <= b3) vertical_compose97iL0(b1, b2, b3, width);
1187 if(b0 <= b2) vertical_compose97iH0(b0, b1, b2, width);
1188 if(width>400){
1189 STOP_TIMER("vertical_compose97i")}}
1190
1191 {START_TIMER
1192 if(y-1>= 0) horizontal_compose97i(b0, width);
1193 if(b0 <= b2) horizontal_compose97i(b1, width);
1194 if(width>400 && b0 <= b2){
1195 STOP_TIMER("horizontal_compose97i")}}
1196
1197 b0=b2;
1198 b1=b3;
1199 b2=b4;
1200 b3=b5;
1201 }
1202 }
1203
1204 static void spatial_idwt(SnowContext *s, int *buffer, int width, int height, int stride){
1205 int level;
1206
1207 for(level=s->spatial_decomposition_count-1; level>=0; level--){
1208 switch(s->spatial_decomposition_type){
1209 case 0: spatial_compose97i(buffer, width>>level, height>>level, stride<<level); break;
1210 case 1: spatial_compose53i(buffer, width>>level, height>>level, stride<<level); break;
1211 case 2: spatial_composeX (buffer, width>>level, height>>level, stride<<level); break;
1212 }
1213 }
1214 }
1215
1216 static const int hilbert[16][2]={
1217 {0,0}, {1,0}, {1,1}, {0,1},
1218 {0,2}, {0,3}, {1,3}, {1,2},
1219 {2,2}, {2,3}, {3,3}, {3,2},
1220 {3,1}, {2,1}, {2,0}, {3,0},
1221 };
1222 #if 0
1223 -o o-
1224 | |
1225 o-o
1226
1227 -o-o o-o-
1228 | |
1229 o-o o-o
1230 | |
1231 o o-o o
1232 | | | |
1233 o-o o-o
1234
1235 0112122312232334122323342334
1236 0123456789ABCDEF0123456789AB
1237 RLLRMRRLLRRMRLLMLRRLMLLRRLLM
1238
1239 4 B F 14 1B
1240 4 11 15 20 27
1241
1242 -o o-o-o o-o-o o-
1243 | | | | | |
1244 o-o o-o o-o o-o
1245 | |
1246 o-o o-o o-o o-o
1247 | | | | | |
1248 o o-o-o o-o-o o
1249 | |
1250 o-o o-o-o-o o-o
1251 | | | |
1252 o-o o-o o-o o-o
1253 | | | |
1254 o o-o o o o-o o
1255 | | | | | | | |
1256 o-o o-o o-o o-o
1257
1258 #endif
1259
1260 #define SVI(a, i, x, y) \
1261 {\
1262 a[i][0]= x;\
1263 a[i][1]= y;\
1264 i++;\
1265 }
1266
1267 static int sig_cmp(const void *a, const void *b){
1268 const int16_t* da = (const int16_t *) a;
1269 const int16_t* db = (const int16_t *) b;
1270
1271 if(da[1] != db[1]) return da[1] - db[1];
1272 else return da[0] - db[0];
1273 }
1274
1275
1276 static void encode_subband(SnowContext *s, SubBand *b, DWTELEM *src, DWTELEM *parent, int stride, int orientation){
1277 const int level= b->level;
1278 const int w= b->width;
1279 const int h= b->height;
1280 int x, y;
1281
1282 #if 0
1283 if(orientation==3 && parent && 0){
1284 int16_t candidate[w*h][2];
1285 uint8_t state[w*h];
1286 int16_t boarder[3][w*h*4][2];
1287 int16_t significant[w*h][2];
1288 int candidate_count=0;
1289 int boarder_count[3]={0,0,0};
1290 int significant_count=0;
1291 int rle_pos=0;
1292 int v, last_v;
1293 int primary= orientation==1;
1294
1295 memset(candidate, 0, sizeof(candidate));
1296 memset(state, 0, sizeof(state));
1297 memset(boarder, 0, sizeof(boarder));
1298
1299 for(y=0; y<h; y++){
1300 for(x=0; x<w; x++){
1301 if(parent[(x>>1) + (y>>1)*2*stride])
1302 SVI(candidate, candidate_count, x, y)
1303 }
1304 }
1305
1306 for(;;){
1307 while(candidate_count && !boarder_count[0] && !boarder_count[1] && !boarder_count[2]){
1308 candidate_count--;
1309 x= candidate[ candidate_count][0];
1310 y= candidate[ candidate_count][1];
1311 if(state[x + y*w])
1312 continue;
1313 state[x + y*w]= 1;
1314 v= !!src[x + y*stride];
1315 put_cabac(&s->c, &b->state[0][0], v);
1316 if(v){
1317 SVI(significant, significant_count, x,y)
1318 if(x && !state[x - 1 + y *w]) SVI(boarder[0],boarder_count[0],x-1,y )
1319 if(y && !state[x + (y-1)*w]) SVI(boarder[1],boarder_count[1],x ,y-1)
1320 if(x+1<w && !state[x + 1 + y *w]) SVI(boarder[0],boarder_count[0],x+1,y )
1321 if(y+1<h && !state[x + (y+1)*w]) SVI(boarder[1],boarder_count[1],x ,y+1)
1322 if(x && y && !state[x - 1 + (y-1)*w]) SVI(boarder[2],boarder_count[2],x-1,y-1)
1323 if(x && y+1<h && !state[x - 1 + (y+1)*w]) SVI(boarder[2],boarder_count[2],x-1,y+1)
1324 if(x+1<w && y+1<h && !state[x + 1 + (y+1)*w]) SVI(boarder[2],boarder_count[2],x+1,y+1)
1325 if(x+1<w && y && !state[x + 1 + (y-1)*w]) SVI(boarder[2],boarder_count[2],x+1,y-1)
1326 }
1327 }
1328 while(!boarder_count[0] && !boarder_count[1] && !boarder_count[2] && rle_pos < w*h){
1329 int run=0;
1330 for(; rle_pos < w*h;){
1331 x= rle_pos % w; //FIXME speed
1332 y= rle_pos / w;
1333 rle_pos++;
1334 if(state[x + y*w])
1335 continue;
1336 state[x + y*w]= 1;
1337 v= !!src[x + y*stride];
1338 if(v){
1339 put_symbol(&s->c, b->state[1], run, 0);
1340 SVI(significant, significant_count, x,y)
1341 if(x && !state[x - 1 + y *w]) SVI(boarder[0],boarder_count[0],x-1,y )
1342 if(y && !state[x + (y-1)*w]) SVI(boarder[1],boarder_count[1],x ,y-1)
1343 if(x+1<w && !state[x + 1 + y *w]) SVI(boarder[0],boarder_count[0],x+1,y )
1344 if(y+1<h && !state[x + (y+1)*w]) SVI(boarder[1],boarder_count[1],x ,y+1)
1345 if(x && y && !state[x - 1 + (y-1)*w]) SVI(boarder[2],boarder_count[2],x-1,y-1)
1346 if(x && y+1<h && !state[x - 1 + (y+1)*w]) SVI(boarder[2],boarder_count[2],x-1,y+1)
1347 if(x+1<w && y+1<h && !state[x + 1 + (y+1)*w]) SVI(boarder[2],boarder_count[2],x+1,y+1)
1348 if(x+1<w && y && !state[x + 1 + (y-1)*w]) SVI(boarder[2],boarder_count[2],x+1,y-1)
1349 break;
1350 //FIXME note only right & down can be boarders
1351 }
1352 run++;
1353 }
1354 }
1355 if(!boarder_count[0] && !boarder_count[1] && !boarder_count[2])
1356 break;
1357
1358 while(boarder_count[0] || boarder_count[1] || boarder_count[2]){
1359 int index;
1360
1361 if (boarder_count[ primary]) index= primary;
1362 else if(boarder_count[1-primary]) index=1-primary;
1363 else index=2;
1364
1365 boarder_count[index]--;
1366 x= boarder[index][ boarder_count[index] ][0];
1367 y= boarder[index][ boarder_count[index] ][1];
1368 if(state[x + y*w]) //FIXME maybe check earlier
1369 continue;
1370 state[x + y*w]= 1;
1371 v= !!src[x + y*stride];
1372 put_cabac(&s->c, &b->state[0][index+1], v);
1373 if(v){
1374 SVI(significant, significant_count, x,y)
1375 if(x && !state[x - 1 + y *w]) SVI(boarder[0],boarder_count[0],x-1,y )
1376 if(y && !state[x + (y-1)*w]) SVI(boarder[1],boarder_count[1],x ,y-1)
1377 if(x+1<w && !state[x + 1 + y *w]) SVI(boarder[0],boarder_count[0],x+1,y )
1378 if(y+1<h && !state[x + (y+1)*w]) SVI(boarder[1],boarder_count[1],x ,y+1)
1379 if(x && y && !state[x - 1 + (y-1)*w]) SVI(boarder[2],boarder_count[2],x-1,y-1)
1380 if(x && y+1<h && !state[x - 1 + (y+1)*w]) SVI(boarder[2],boarder_count[2],x-1,y+1)
1381 if(x+1<w && y+1<h && !state[x + 1 + (y+1)*w]) SVI(boarder[2],boarder_count[2],x+1,y+1)
1382 if(x+1<w && y && !state[x + 1 + (y-1)*w]) SVI(boarder[2],boarder_count[2],x+1,y-1)
1383 }
1384 }
1385 }
1386 //FIXME sort significant coeffs maybe
1387 if(1){
1388 qsort(significant, significant_count, sizeof(int16_t[2]), sig_cmp);
1389 }
1390
1391 last_v=1;
1392 while(significant_count){
1393 int context= 3 + quant7[last_v&0xFF]; //use significance of suroundings
1394 significant_count--;
1395 x= significant[significant_count][0];//FIXME try opposit direction
1396 y= significant[significant_count][1];
1397 v= src[x + y*stride];
1398 put_symbol(&s->c, b->state[context + 2], v, 1); //FIXME try to avoid first bit, try this with the old code too!!
1399 last_v= v;
1400 }
1401 }
1402 #endif
1403 if(1){
1404 int run=0;
1405 int runs[w*h];
1406 int run_index=0;
1407
1408 for(y=0; y<h; y++){
1409 for(x=0; x<w; x++){
1410 int v, p=0;
1411 int /*ll=0, */l=0, lt=0, t=0, rt=0;
1412 v= src[x + y*stride];
1413
1414 if(y){
1415 t= src[x + (y-1)*stride];
1416 if(x){
1417 lt= src[x - 1 + (y-1)*stride];
1418 }
1419 if(x + 1 < w){
1420 rt= src[x + 1 + (y-1)*stride];
1421 }
1422 }
1423 if(x){
1424 l= src[x - 1 + y*stride];
1425 /*if(x > 1){
1426 if(orientation==1) ll= src[y + (x-2)*stride];
1427 else ll= src[x - 2 + y*stride];
1428 }*/
1429 }
1430 if(parent){
1431 int px= x>>1;
1432 int py= y>>1;
1433 if(px<b->parent->width && py<b->parent->height)
1434 p= parent[px + py*2*stride];
1435 }
1436 if(!(/*ll|*/l|lt|t|rt|p)){
1437 if(v){
1438 runs[run_index++]= run;
1439 run=0;
1440 }else{
1441 run++;
1442 }
1443 }
1444 }
1445 }
1446 runs[run_index++]= run;
1447 run_index=0;
1448 run= runs[run_index++];
1449
1450 put_symbol(&s->c, b->state[1], run, 0);
1451
1452 for(y=0; y<h; y++){
1453 for(x=0; x<w; x++){
1454 int v, p=0;
1455 int /*ll=0, */l=0, lt=0, t=0, rt=0;
1456 v= src[x + y*stride];
1457
1458 if(y){
1459 t= src[x + (y-1)*stride];
1460 if(x){
1461 lt= src[x - 1 + (y-1)*stride];
1462 }
1463 if(x + 1 < w){
1464 rt= src[x + 1 + (y-1)*stride];
1465 }
1466 }
1467 if(x){
1468 l= src[x - 1 + y*stride];
1469 /*if(x > 1){
1470 if(orientation==1) ll= src[y + (x-2)*stride];
1471 else ll= src[x - 2 + y*stride];
1472 }*/
1473 }
1474 if(parent){
1475 int px= x>>1;
1476 int py= y>>1;
1477 if(px<b->parent->width && py<b->parent->height)
1478 p= parent[px + py*2*stride];
1479 }
1480 if(/*ll|*/l|lt|t|rt|p){
1481 int context= av_log2(/*ABS(ll) + */3*ABS(l) + ABS(lt) + 2*ABS(t) + ABS(rt) + ABS(p));
1482
1483 put_cabac(&s->c, &b->state[0][context], !!v);
1484 }else{
1485 if(!run){
1486 run= runs[run_index++];
1487 put_symbol(&s->c, b->state[1], run, 0);
1488 assert(v);
1489 }else{
1490 run--;
1491 assert(!v);
1492 }
1493 }
1494 if(v){
1495 int context= av_log2(/*ABS(ll) + */3*ABS(l) + ABS(lt) + 2*ABS(t) + ABS(rt) + ABS(p));
1496
1497 put_symbol(&s->c, b->state[context + 2], ABS(v)-1, 0);
1498 put_cabac(&s->c, &b->state[0][16 + 1 + 3 + quant3b[l&0xFF] + 3*quant3b[t&0xFF]], v<0);
1499 }
1500 }
1501 }
1502 return;
1503 }
1504 }
1505
1506 static inline void decode_subband(SnowContext *s, SubBand *b, DWTELEM *src, DWTELEM *parent, int stride, int orientation){
1507 const int level= b->level;
1508 const int w= b->width;
1509 const int h= b->height;
1510 int x,y;
1511
1512 START_TIMER
1513
1514 if(1){
1515 int run;
1516
1517 for(y=0; y<b->height; y++)
1518 memset(&src[y*stride], 0, b->width*sizeof(DWTELEM));
1519
1520 run= get_symbol(&s->c, b->state[1], 0);
1521 for(y=0; y<h; y++){
1522 for(x=0; x<w; x++){
1523 int v, p=0;
1524 int /*ll=0, */l=0, lt=0, t=0, rt=0;
1525
1526 if(y){
1527 t= src[x + (y-1)*stride];
1528 if(x){
1529 lt= src[x - 1 + (y-1)*stride];
1530 }
1531 if(x + 1 < w){
1532 rt= src[x + 1 + (y-1)*stride];
1533 }
1534 }
1535 if(x){
1536 l= src[x - 1 + y*stride];
1537 /*if(x > 1){
1538 if(orientation==1) ll= src[y + (x-2)*stride];
1539 else ll= src[x - 2 + y*stride];
1540 }*/
1541 }
1542 if(parent){
1543 int px= x>>1;
1544 int py= y>>1;
1545 if(px<b->parent->width && py<b->parent->height)
1546 p= parent[px + py*2*stride];
1547 }
1548 if(/*ll|*/l|lt|t|rt|p){
1549 int context= av_log2(/*ABS(ll) + */3*ABS(l) + ABS(lt) + 2*ABS(t) + ABS(rt) + ABS(p));
1550
1551 v=get_cabac(&s->c, &b->state[0][context]);
1552 }else{
1553 if(!run){
1554 run= get_symbol(&s->c, b->state[1], 0);
1555 //FIXME optimize this here
1556 //FIXME try to store a more naive run
1557 v=1;
1558 }else{
1559 run--;
1560 v=0;
1561 }
1562 }
1563 if(v){
1564 int context= av_log2(/*ABS(ll) + */3*ABS(l) + ABS(lt) + 2*ABS(t) + ABS(rt) + ABS(p));
1565 v= get_symbol(&s->c, b->state[context + 2], 0) + 1;
1566 if(get_cabac(&s->c, &b->state[0][16 + 1 + 3 + quant3b[l&0xFF] + 3*quant3b[t&0xFF]]))
1567 v= -v;
1568 src[x + y*stride]= v;
1569 }
1570 }
1571 }
1572 if(level+1 == s->spatial_decomposition_count){
1573 STOP_TIMER("decode_subband")
1574 }
1575
1576 return;
1577 }
1578 }
1579
1580 static void reset_contexts(SnowContext *s){
1581 int plane_index, level, orientation;
1582
1583 for(plane_index=0; plane_index<2; plane_index++){
1584 for(level=0; level<s->spatial_decomposition_count; level++){
1585 for(orientation=level ? 1:0; orientation<4; orientation++){
1586 memset(s->plane[plane_index].band[level][orientation].state, 0, sizeof(s->plane[plane_index].band[level][orientation].state));
1587 }
1588 }
1589 }
1590 memset(s->mb_band.state, 0, sizeof(s->mb_band.state));
1591 memset(s->mv_band[0].state, 0, sizeof(s->mv_band[0].state));
1592 memset(s->mv_band[1].state, 0, sizeof(s->mv_band[1].state));
1593 memset(s->header_state, 0, sizeof(s->header_state));
1594 }
1595
1596 static void mc_block(uint8_t *dst, uint8_t *src, uint8_t *tmp, int stride, int b_w, int b_h, int dx, int dy){
1597 int x, y;
1598
1599 for(y=0; y < b_h+5; y++){
1600 for(x=0; x < b_w; x++){
1601 int a0= src[x + y*stride];
1602 int a1= src[x + 1 + y*stride];
1603 int a2= src[x + 2 + y*stride];
1604 int a3= src[x + 3 + y*stride];
1605 int a4= src[x + 4 + y*stride];
1606 int a5= src[x + 5 + y*stride];
1607 // int am= 9*(a1+a2) - (a0+a3);
1608 int am= 20*(a2+a3) - 5*(a1+a4) + (a0+a5);
1609 // int am= 18*(a2+a3) - 2*(a1+a4);
1610 // int aL= (-7*a0 + 105*a1 + 35*a2 - 5*a3)>>3;
1611 // int aR= (-7*a3 + 105*a2 + 35*a1 - 5*a0)>>3;
1612
1613 // if(b_w==16) am= 8*(a1+a2);
1614
1615 if(dx<8) tmp[x + y*stride]= (32*a2*( 8-dx) + am* dx + 128)>>8;
1616 else tmp[x + y*stride]= ( am*(16-dx) + 32*a3*(dx-8) + 128)>>8;
1617
1618 /* if (dx< 4) tmp[x + y*stride]= (16*a1*( 4-dx) + aL* dx + 32)>>6;
1619 else if(dx< 8) tmp[x + y*stride]= ( aL*( 8-dx) + am*(dx- 4) + 32)>>6;
1620 else if(dx<12) tmp[x + y*stride]= ( am*(12-dx) + aR*(dx- 8) + 32)>>6;
1621 else tmp[x + y*stride]= ( aR*(16-dx) + 16*a2*(dx-12) + 32)>>6;*/
1622 }
1623 }
1624 for(y=0; y < b_h; y++){
1625 for(x=0; x < b_w; x++){
1626 int a0= tmp[x + y *stride];
1627 int a1= tmp[x + (y + 1)*stride];
1628 int a2= tmp[x + (y + 2)*stride];
1629 int a3= tmp[x + (y + 3)*stride];
1630 int a4= tmp[x + (y + 4)*stride];
1631 int a5= tmp[x + (y + 5)*stride];
1632 int am= 20*(a2+a3) - 5*(a1+a4) + (a0+a5);
1633 // int am= 18*(a2+a3) - 2*(a1+a4);
1634 /* int aL= (-7*a0 + 105*a1 + 35*a2 - 5*a3)>>3;
1635 int aR= (-7*a3 + 105*a2 + 35*a1 - 5*a0)>>3;*/
1636
1637 // if(b_w==16) am= 8*(a1+a2);
1638
1639 if(dy<8) dst[x + y*stride]= (32*a2*( 8-dy) + am* dy + 128)>>8;
1640 else dst[x + y*stride]= ( am*(16-dy) + 32*a3*(dy-8) + 128)>>8;
1641
1642 /* if (dy< 4) tmp[x + y*stride]= (16*a1*( 4-dy) + aL* dy + 32)>>6;
1643 else if(dy< 8) tmp[x + y*stride]= ( aL*( 8-dy) + am*(dy- 4) + 32)>>6;
1644 else if(dy<12) tmp[x + y*stride]= ( am*(12-dy) + aR*(dy- 8) + 32)>>6;
1645 else tmp[x + y*stride]= ( aR*(16-dy) + 16*a2*(dy-12) + 32)>>6;*/
1646 }
1647 }
1648 }
1649
1650 #define mcb(dx,dy,b_w)\
1651 static void mc_block ## dx ## dy(uint8_t *dst, uint8_t *src, int stride){\
1652 uint8_t tmp[stride*(b_w+5)];\
1653 mc_block(dst, src-2-2*stride, tmp, stride, b_w, b_w, dx, dy);\
1654 }
1655
1656 mcb( 0, 0,16)
1657 mcb( 4, 0,16)
1658 mcb( 8, 0,16)
1659 mcb(12, 0,16)
1660 mcb( 0, 4,16)
1661 mcb( 4, 4,16)
1662 mcb( 8, 4,16)
1663 mcb(12, 4,16)
1664 mcb( 0, 8,16)
1665 mcb( 4, 8,16)
1666 mcb( 8, 8,16)
1667 mcb(12, 8,16)
1668 mcb( 0,12,16)
1669 mcb( 4,12,16)
1670 mcb( 8,12,16)
1671 mcb(12,12,16)
1672
1673 #define mca(dx,dy,b_w)\
1674 static void mc_block_hpel ## dx ## dy(uint8_t *dst, uint8_t *src, int stride, int h){\
1675 uint8_t tmp[stride*(b_w+5)];\
1676 assert(h==b_w);\
1677 mc_block(dst, src-2-2*stride, tmp, stride, b_w, b_w, dx, dy);\
1678 }
1679
1680 mca( 0, 0,16)
1681 mca( 8, 0,16)
1682 mca( 0, 8,16)
1683 mca( 8, 8,16)
1684
1685 static void add_xblock(DWTELEM *dst, uint8_t *src, uint8_t *obmc, int s_x, int s_y, int b_w, int b_h, int mv_x, int mv_y, int w, int h, int dst_stride, int src_stride, int obmc_stride, int mb_type, int add){
1686 uint8_t tmp[src_stride*(b_h+5)]; //FIXME move to context to gurantee alignment
1687 int x,y;
1688
1689 if(s_x<0){
1690 obmc -= s_x;
1691 b_w += s_x;
1692 s_x=0;
1693 }else if(s_x + b_w > w){
1694 b_w = w - s_x;
1695 }
1696 if(s_y<0){
1697 obmc -= s_y*obmc_stride;
1698 b_h += s_y;
1699 s_y=0;
1700 }else if(s_y + b_h> h){
1701 b_h = h - s_y;
1702 }
1703
1704 if(b_w<=0 || b_h<=0) return;
1705
1706 dst += s_x + s_y*dst_stride;
1707
1708 if(mb_type==1){
1709 src += s_x + s_y*src_stride;
1710 for(y=0; y < b_h; y++){
1711 for(x=0; x < b_w; x++){
1712 if(add) dst[x + y*dst_stride] += obmc[x + y*obmc_stride] * 128 * (256/OBMC_MAX);
1713 else dst[x + y*dst_stride] -= obmc[x + y*obmc_stride] * 128 * (256/OBMC_MAX);
1714 }
1715 }
1716 }else{
1717 int dx= mv_x&15;
1718 int dy= mv_y&15;
1719 // int dxy= (mv_x&1) + 2*(mv_y&1);
1720
1721 s_x += (mv_x>>4) - 2;
1722 s_y += (mv_y>>4) - 2;
1723 src += s_x + s_y*src_stride;
1724 //use dsputil
1725
1726 if( (unsigned)s_x >= w - b_w - 4
1727 || (unsigned)s_y >= h - b_h - 4){
1728 ff_emulated_edge_mc(tmp + 32, src, src_stride, b_w+5, b_h+5, s_x, s_y, w, h);
1729 src= tmp + 32;
1730 }
1731
1732 if(mb_type==0){
1733 mc_block(tmp, src, tmp + 64+8, src_stride, b_w, b_h, dx, dy);
1734 }else{
1735 int sum=0;
1736 for(y=0; y < b_h; y++){
1737 for(x=0; x < b_w; x++){
1738 sum += src[x+ y*src_stride];
1739 }
1740 }
1741 sum= (sum + b_h*b_w/2) / (b_h*b_w);
1742 for(y=0; y < b_h; y++){
1743 for(x=0; x < b_w; x++){
1744 tmp[x + y*src_stride]= sum;
1745 }
1746 }
1747 }
1748
1749 for(y=0; y < b_h; y++){
1750 for(x=0; x < b_w; x++){
1751 if(add) dst[x + y*dst_stride] += obmc[x + y*obmc_stride] * tmp[x + y*src_stride] * (256/OBMC_MAX);
1752 else dst[x + y*dst_stride] -= obmc[x + y*obmc_stride] * tmp[x + y*src_stride] * (256/OBMC_MAX);
1753 }
1754 }
1755 }
1756 }
1757
1758 static void predict_plane(SnowContext *s, DWTELEM *buf, int plane_index, int add){
1759 Plane *p= &s->plane[plane_index];
1760 const int mb_w= s->mb_band.width;
1761 const int mb_h= s->mb_band.height;
1762 const int mb_stride= s->mb_band.stride;
1763 int x, y, mb_x, mb_y;
1764 int scale = plane_index ? s->mv_scale : 2*s->mv_scale;
1765 int block_w = plane_index ? 8 : 16;
1766 uint8_t *obmc = plane_index ? obmc16 : obmc32;
1767 int obmc_stride= plane_index ? 16 : 32;
1768 int ref_stride= s->last_picture.linesize[plane_index];
1769 uint8_t *ref = s->last_picture.data[plane_index];
1770 int w= p->width;
1771 int h= p->height;
1772
1773 if(s->avctx->debug&512){
1774 for(y=0; y<h; y++){
1775 for(x=0; x<w; x++){
1776 if(add) buf[x + y*w]+= 128*256;
1777 else buf[x + y*w]-= 128*256;
1778 }
1779 }
1780
1781 return;
1782 }
1783 for(mb_y=-1; mb_y<=mb_h; mb_y++){
1784 for(mb_x=-1; mb_x<=mb_w; mb_x++){
1785 int index= clip(mb_x, 0, mb_w-1) + clip(mb_y, 0, mb_h-1)*mb_stride;
1786
1787 add_xblock(buf, ref, obmc,
1788 block_w*mb_x - block_w/2,
1789 block_w*mb_y - block_w/2,
1790 2*block_w, 2*block_w,
1791 s->mv_band[0].buf[index]*scale, s->mv_band[1].buf[index]*scale,
1792 w, h,
1793 w, ref_stride, obmc_stride,
1794 s->mb_band.buf[index], add);
1795
1796 }
1797 }
1798 }
1799
1800 static void quantize(SnowContext *s, SubBand *b, DWTELEM *src, int stride, int bias){
1801 const int level= b->level;
1802 const int w= b->width;
1803 const int h= b->height;
1804 const int qlog= clip(s->qlog + b->qlog, 0, 128);
1805 const int qmul= qexp[qlog&7]<<(qlog>>3);
1806 int x,y, thres1, thres2;
1807 START_TIMER
1808
1809 assert(QROOT==8);
1810
1811 bias= bias ? 0 : (3*qmul)>>3;
1812 thres1= ((qmul - bias)>>QEXPSHIFT) - 1;
1813 thres2= 2*thres1;
1814
1815 if(!bias){
1816 for(y=0; y<h; y++){
1817 for(x=0; x<w; x++){
1818 int i= src[x + y*stride];
1819
1820 if((unsigned)(i+thres1) > thres2){
1821 if(i>=0){
1822 i<<= QEXPSHIFT;
1823 i/= qmul; //FIXME optimize
1824 src[x + y*stride]= i;
1825 }else{
1826 i= -i;
1827 i<<= QEXPSHIFT;
1828 i/= qmul; //FIXME optimize
1829 src[x + y*stride]= -i;
1830 }
1831 }else
1832 src[x + y*stride]= 0;
1833 }
1834 }
1835 }else{
1836 for(y=0; y<h; y++){
1837 for(x=0; x<w; x++){
1838 int i= src[x + y*stride];
1839
1840 if((unsigned)(i+thres1) > thres2){
1841 if(i>=0){
1842 i<<= QEXPSHIFT;
1843 i= (i + bias) / qmul; //FIXME optimize
1844 src[x + y*stride]= i;
1845 }else{
1846 i= -i;
1847 i<<= QEXPSHIFT;
1848 i= (i + bias) / qmul; //FIXME optimize
1849 src[x + y*stride]= -i;
1850 }
1851 }else
1852 src[x + y*stride]= 0;
1853 }
1854 }
1855 }
1856 if(level+1 == s->spatial_decomposition_count){
1857 // STOP_TIMER("quantize")
1858 }
1859 }
1860
1861 static void dequantize(SnowContext *s, SubBand *b, DWTELEM *src, int stride){
1862 const int level= b->level;
1863 const int w= b->width;
1864 const int h= b->height;
1865 const int qlog= clip(s->qlog + b->qlog, 0, 128);
1866 const int qmul= qexp[qlog&7]<<(qlog>>3);
1867 const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
1868 int x,y;
1869
1870 assert(QROOT==8);
1871
1872 for(y=0; y<h; y++){
1873 for(x=0; x<w; x++){
1874 int i= src[x + y*stride];
1875 if(i<0){
1876 src[x + y*stride]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
1877 }else if(i>0){
1878 src[x + y*stride]= (( i*qmul + qadd)>>(QEXPSHIFT));
1879 }
1880 }
1881 }
1882 }
1883
1884 static void decorrelate(SnowContext *s, SubBand *b, DWTELEM *src, int stride, int inverse, int use_median){
1885 const int w= b->width;
1886 const int h= b->height;
1887 int x,y;
1888
1889 for(y=h-1; y>=0; y--){
1890 for(x=w-1; x>=0; x--){
1891 int i= x + y*stride;
1892
1893 if(x){
1894 if(use_median){
1895 if(y && x+1<w) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1896 else src[i] -= src[i - 1];
1897 }else{
1898 if(y) src[i] -= mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1899 else src[i] -= src[i - 1];
1900 }
1901 }else{
1902 if(y) src[i] -= src[i - stride];
1903 }
1904 }
1905 }
1906 }
1907
1908 static void correlate(SnowContext *s, SubBand *b, DWTELEM *src, int stride, int inverse, int use_median){
1909 const int w= b->width;
1910 const int h= b->height;
1911 int x,y;
1912
1913 for(y=0; y<h; y++){
1914 for(x=0; x<w; x++){
1915 int i= x + y*stride;
1916
1917 if(x){
1918 if(use_median){
1919 if(y && x+1<w) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - stride + 1]);
1920 else src[i] += src[i - 1];
1921 }else{
1922 if(y) src[i] += mid_pred(src[i - 1], src[i - stride], src[i - 1] + src[i - stride] - src[i - 1 - stride]);
1923 else src[i] += src[i - 1];
1924 }
1925 }else{
1926 if(y) src[i] += src[i - stride];
1927 }
1928 }
1929 }
1930 }
1931
1932 static void encode_header(SnowContext *s){
1933 int plane_index, level, orientation;
1934
1935 put_cabac(&s->c, s->header_state, s->keyframe); // state clearing stuff?
1936 if(s->keyframe){
1937 put_symbol(&s->c, s->header_state, s->version, 0);
1938 put_symbol(&s->c, s->header_state, s->temporal_decomposition_type, 0);
1939 put_symbol(&s->c, s->header_state, s->temporal_decomposition_count, 0);
1940 put_symbol(&s->c, s->header_state, s->spatial_decomposition_count, 0);
1941 put_symbol(&s->c, s->header_state, s->colorspace_type, 0);
1942 put_symbol(&s->c, s->header_state, s->b_width, 0);
1943 put_symbol(&s->c, s->header_state, s->b_height, 0);
1944 put_symbol(&s->c, s->header_state, s->chroma_h_shift, 0);
1945 put_symbol(&s->c, s->header_state, s->chroma_v_shift, 0);
1946 put_cabac(&s->c, s->header_state, s->spatial_scalability);
1947 // put_cabac(&s->c, s->header_state, s->rate_scalability);
1948
1949 for(plane_index=0; plane_index<2; plane_index++){
1950 for(level=0; level<s->spatial_decomposition_count; level++){
1951 for(orientation=level ? 1:0; orientation<4; orientation++){
1952 if(orientation==2) continue;
1953 put_symbol(&s->c, s->header_state, s->plane[plane_index].band[level][orientation].qlog, 1);
1954 }
1955 }
1956 }
1957 }
1958 put_symbol(&s->c, s->header_state, s->spatial_decomposition_type, 0);
1959 put_symbol(&s->c, s->header_state, s->qlog, 1);
1960 put_symbol(&s->c, s->header_state, s->mv_scale, 0);
1961 put_symbol(&s->c, s->header_state, s->qbias, 1);
1962 }
1963
1964 static int decode_header(SnowContext *s){
1965 int plane_index, level, orientation;
1966
1967 s->keyframe= get_cabac(&s->c, s->header_state);
1968 if(s->keyframe){
1969 s->version= get_symbol(&s->c, s->header_state, 0);
1970 if(s->version>0){
1971 av_log(s->avctx, AV_LOG_ERROR, "version %d not supported", s->version);
1972 return -1;
1973 }
1974 s->temporal_decomposition_type= get_symbol(&s->c, s->header_state, 0);
1975 s->temporal_decomposition_count= get_symbol(&s->c, s->header_state, 0);
1976 s->spatial_decomposition_count= get_symbol(&s->c, s->header_state, 0);
1977 s->colorspace_type= get_symbol(&s->c, s->header_state, 0);
1978 s->b_width= get_symbol(&s->c, s->header_state, 0);
1979 s->b_height= get_symbol(&s->c, s->header_state, 0);
1980 s->chroma_h_shift= get_symbol(&s->c, s->header_state, 0);
1981 s->chroma_v_shift= get_symbol(&s->c, s->header_state, 0);
1982 s->spatial_scalability= get_cabac(&s->c, s->header_state);
1983 // s->rate_scalability= get_cabac(&s->c, s->header_state);
1984
1985 for(plane_index=0; plane_index<3; plane_index++){
1986 for(level=0; level<s->spatial_decomposition_count; level++){
1987 for(orientation=level ? 1:0; orientation<4; orientation++){
1988 int q;
1989 if (plane_index==2) q= s->plane[1].band[level][orientation].qlog;
1990 else if(orientation==2) q= s->plane[plane_index].band[level][1].qlog;
1991 else q= get_symbol(&s->c, s->header_state, 1);
1992 s->plane[plane_index].band[level][orientation].qlog= q;
1993 }
1994 }
1995 }
1996 }
1997
1998 s->spatial_decomposition_type= get_symbol(&s->c, s->header_state, 0);
1999 if(s->spatial_decomposition_type > 2){
2000 av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_type %d not supported", s->spatial_decomposition_type);
2001 return -1;
2002 }
2003
2004 s->qlog= get_symbol(&s->c, s->header_state, 1);
2005 s->mv_scale= get_symbol(&s->c, s->header_state, 0);
2006 s->qbias= get_symbol(&s->c, s->header_state, 1);
2007
2008 return 0;
2009 }
2010
2011 static int common_init(AVCodecContext *avctx){
2012 SnowContext *s = avctx->priv_data;
2013 int width, height;
2014 int level, orientation, plane_index, dec;
2015
2016 s->avctx= avctx;
2017
2018 dsputil_init(&s->dsp, avctx);
2019
2020 #define mcf(dx,dy)\
2021 s->dsp.put_qpel_pixels_tab [0][dy+dx/4]=\
2022 s->dsp.put_no_rnd_qpel_pixels_tab[0][dy+dx/4]=\
2023 mc_block ## dx ## dy;
2024
2025 mcf( 0, 0)
2026 mcf( 4, 0)
2027 mcf( 8, 0)
2028 mcf(12, 0)
2029 mcf( 0, 4)
2030 mcf( 4, 4)
2031 mcf( 8, 4)
2032 mcf(12, 4)
2033 mcf( 0, 8)
2034 mcf( 4, 8)
2035 mcf( 8, 8)
2036 mcf(12, 8)
2037 mcf( 0,12)
2038 mcf( 4,12)
2039 mcf( 8,12)
2040 mcf(12,12)
2041
2042 #define mcfh(dx,dy)\
2043 s->dsp.put_pixels_tab [0][dy/4+dx/8]=\
2044 s->dsp.put_no_rnd_pixels_tab[0][dy/4+dx/8]=\
2045 mc_block_hpel ## dx ## dy;
2046
2047 mcfh(0, 0)
2048 mcfh(8, 0)
2049 mcfh(0, 8)
2050 mcfh(8, 8)
2051
2052 dec= s->spatial_decomposition_count= 5;
2053 s->spatial_decomposition_type= avctx->prediction_method; //FIXME add decorrelator type r transform_type
2054
2055 s->chroma_h_shift= 1; //FIXME XXX
2056 s->chroma_v_shift= 1;
2057
2058 // dec += FFMAX(s->chroma_h_shift, s->chroma_v_shift);
2059
2060 s->b_width = (s->avctx->width +(1<<dec)-1)>>dec;
2061 s->b_height= (s->avctx->height+(1<<dec)-1)>>dec;
2062
2063 s->spatial_dwt_buffer= av_mallocz(s->b_width*s->b_height*sizeof(DWTELEM)<<(2*dec));
2064 s->pred_buffer= av_mallocz(s->b_width*s->b_height*sizeof(DWTELEM)<<(2*dec));
2065