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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Discrete wavelet transform |
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| 3 | * Copyright (c) 2007 Kamil Nowosad |
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| 4 | * Copyright (c) 2013 Nicolas Bertrand |
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| 5 | * |
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| 6 | * This file is part of FFmpeg. |
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| 7 | * |
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| 8 | * FFmpeg is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Lesser General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2.1 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * FFmpeg is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public |
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| 19 | * License along with FFmpeg; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |||
| 23 | /** |
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| 24 | * @file |
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| 25 | * Discrete wavelet transform |
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| 26 | */ |
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| 27 | |||
| 28 | #include "libavutil/common.h" |
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| 29 | #include "libavutil/mem.h" |
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| 30 | #include "jpeg2000dwt.h" |
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| 31 | #include "internal.h" |
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| 32 | |||
| 33 | /* Defines for 9/7 DWT lifting parameters. |
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| 34 | * Parameters are in float. */ |
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| 35 | #define F_LFTG_ALPHA 1.586134342059924f |
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| 36 | #define F_LFTG_BETA 0.052980118572961f |
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| 37 | #define F_LFTG_GAMMA 0.882911075530934f |
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| 38 | #define F_LFTG_DELTA 0.443506852043971f |
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| 39 | #define F_LFTG_K 1.230174104914001f |
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| 40 | #define F_LFTG_X 1.625732422f |
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| 41 | /* FIXME: Why use 1.625732422 instead of 1/F_LFTG_K? |
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| 42 | * Incorrect value in JPEG2000 norm. |
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| 43 | * see (ISO/IEC 15444:1 (version 2002) F.3.8.2 */ |
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| 44 | |||
| 45 | /* Lifting parameters in integer format. |
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| 46 | * Computed as param = (float param) * (1 << 16) */ |
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| 47 | #define I_LFTG_ALPHA 103949 |
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| 48 | #define I_LFTG_BETA 3472 |
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| 49 | #define I_LFTG_GAMMA 57862 |
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| 50 | #define I_LFTG_DELTA 29066 |
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| 51 | #define I_LFTG_K 80621 |
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| 52 | #define I_LFTG_X 106544 |
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| 53 | |||
| 54 | static inline void extend53(int *p, int i0, int i1) |
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| 55 | { |
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| 56 | p[i0 - 1] = p[i0 + 1]; |
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| 57 | p[i1] = p[i1 - 2]; |
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| 58 | p[i0 - 2] = p[i0 + 2]; |
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| 59 | p[i1 + 1] = p[i1 - 3]; |
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| 60 | } |
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| 61 | |||
| 62 | static inline void extend97_float(float *p, int i0, int i1) |
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| 63 | { |
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| 64 | int i; |
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| 65 | |||
| 66 | for (i = 1; i <= 4; i++) { |
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| 67 | p[i0 - i] = p[i0 + i]; |
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| 68 | p[i1 + i - 1] = p[i1 - i - 1]; |
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| 69 | } |
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| 70 | } |
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| 71 | |||
| 72 | static inline void extend97_int(int32_t *p, int i0, int i1) |
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| 73 | { |
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| 74 | int i; |
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| 75 | |||
| 76 | for (i = 1; i <= 4; i++) { |
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| 77 | p[i0 - i] = p[i0 + i]; |
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| 78 | p[i1 + i - 1] = p[i1 - i - 1]; |
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| 79 | } |
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| 80 | } |
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| 81 | |||
| 82 | static void sd_1d53(int *p, int i0, int i1) |
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| 83 | { |
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| 84 | int i; |
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| 85 | |||
| 86 | if (i1 == i0 + 1) |
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| 87 | return; |
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| 88 | |||
| 89 | extend53(p, i0, i1); |
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| 90 | |||
| 91 | for (i = (i0+1)/2 - 1; i < (i1+1)/2; i++) |
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| 92 | p[2*i+1] -= (p[2*i] + p[2*i+2]) >> 1; |
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| 93 | for (i = (i0+1)/2; i < (i1+1)/2; i++) |
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| 94 | p[2*i] += (p[2*i-1] + p[2*i+1] + 2) >> 2; |
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| 95 | } |
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| 96 | |||
| 97 | static void dwt_encode53(DWTContext *s, int *t) |
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| 98 | { |
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| 99 | int lev, |
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| 100 | w = s->linelen[s->ndeclevels-1][0]; |
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| 101 | int *line = s->i_linebuf; |
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| 102 | line += 3; |
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| 103 | |||
| 104 | for (lev = s->ndeclevels-1; lev >= 0; lev--){ |
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| 105 | int lh = s->linelen[lev][0], |
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| 106 | lv = s->linelen[lev][1], |
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| 107 | mh = s->mod[lev][0], |
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| 108 | mv = s->mod[lev][1], |
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| 109 | lp; |
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| 110 | int *l; |
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| 111 | |||
| 112 | // HOR_SD |
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| 113 | l = line + mh; |
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| 114 | for (lp = 0; lp < lv; lp++){ |
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| 115 | int i, j = 0; |
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| 116 | |||
| 117 | for (i = 0; i < lh; i++) |
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| 118 | l[i] = t[w*lp + i]; |
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| 119 | |||
| 120 | sd_1d53(line, mh, mh + lh); |
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| 121 | |||
| 122 | // copy back and deinterleave |
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| 123 | for (i = mh; i < lh; i+=2, j++) |
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| 124 | t[w*lp + j] = l[i]; |
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| 125 | for (i = 1-mh; i < lh; i+=2, j++) |
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| 126 | t[w*lp + j] = l[i]; |
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| 127 | } |
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| 128 | |||
| 129 | // VER_SD |
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| 130 | l = line + mv; |
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| 131 | for (lp = 0; lp < lh; lp++) { |
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| 132 | int i, j = 0; |
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| 133 | |||
| 134 | for (i = 0; i < lv; i++) |
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| 135 | l[i] = t[w*i + lp]; |
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| 136 | |||
| 137 | sd_1d53(line, mv, mv + lv); |
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| 138 | |||
| 139 | // copy back and deinterleave |
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| 140 | for (i = mv; i < lv; i+=2, j++) |
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| 141 | t[w*j + lp] = l[i]; |
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| 142 | for (i = 1-mv; i < lv; i+=2, j++) |
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| 143 | t[w*j + lp] = l[i]; |
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| 144 | } |
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| 145 | } |
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| 146 | } |
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| 147 | static void sd_1d97_float(float *p, int i0, int i1) |
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| 148 | { |
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| 149 | int i; |
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| 150 | |||
| 151 | if (i1 == i0 + 1) |
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| 152 | return; |
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| 153 | |||
| 154 | extend97_float(p, i0, i1); |
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| 155 | i0++; i1++; |
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| 156 | |||
| 157 | for (i = i0/2 - 2; i < i1/2 + 1; i++) |
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| 158 | p[2*i+1] -= 1.586134 * (p[2*i] + p[2*i+2]); |
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| 159 | for (i = i0/2 - 1; i < i1/2 + 1; i++) |
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| 160 | p[2*i] -= 0.052980 * (p[2*i-1] + p[2*i+1]); |
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| 161 | for (i = i0/2 - 1; i < i1/2; i++) |
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| 162 | p[2*i+1] += 0.882911 * (p[2*i] + p[2*i+2]); |
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| 163 | for (i = i0/2; i < i1/2; i++) |
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| 164 | p[2*i] += 0.443506 * (p[2*i-1] + p[2*i+1]); |
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| 165 | } |
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| 166 | |||
| 167 | static void dwt_encode97_float(DWTContext *s, float *t) |
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| 168 | { |
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| 169 | int lev, |
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| 170 | w = s->linelen[s->ndeclevels-1][0]; |
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| 171 | float *line = s->f_linebuf; |
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| 172 | line += 5; |
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| 173 | |||
| 174 | for (lev = s->ndeclevels-1; lev >= 0; lev--){ |
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| 175 | int lh = s->linelen[lev][0], |
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| 176 | lv = s->linelen[lev][1], |
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| 177 | mh = s->mod[lev][0], |
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| 178 | mv = s->mod[lev][1], |
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| 179 | lp; |
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| 180 | float *l; |
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| 181 | |||
| 182 | // HOR_SD |
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| 183 | l = line + mh; |
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| 184 | for (lp = 0; lp < lv; lp++){ |
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| 185 | int i, j = 0; |
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| 186 | |||
| 187 | for (i = 0; i < lh; i++) |
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| 188 | l[i] = t[w*lp + i]; |
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| 189 | |||
| 190 | sd_1d97_float(line, mh, mh + lh); |
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| 191 | |||
| 192 | // copy back and deinterleave |
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| 193 | for (i = mh; i < lh; i+=2, j++) |
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| 194 | t[w*lp + j] = F_LFTG_X * l[i] / 2; |
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| 195 | for (i = 1-mh; i < lh; i+=2, j++) |
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| 196 | t[w*lp + j] = F_LFTG_K * l[i] / 2; |
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| 197 | } |
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| 198 | |||
| 199 | // VER_SD |
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| 200 | l = line + mv; |
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| 201 | for (lp = 0; lp < lh; lp++) { |
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| 202 | int i, j = 0; |
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| 203 | |||
| 204 | for (i = 0; i < lv; i++) |
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| 205 | l[i] = t[w*i + lp]; |
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| 206 | |||
| 207 | sd_1d97_float(line, mv, mv + lv); |
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| 208 | |||
| 209 | // copy back and deinterleave |
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| 210 | for (i = mv; i < lv; i+=2, j++) |
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| 211 | t[w*j + lp] = F_LFTG_X * l[i] / 2; |
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| 212 | for (i = 1-mv; i < lv; i+=2, j++) |
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| 213 | t[w*j + lp] = F_LFTG_K * l[i] / 2; |
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| 214 | } |
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| 215 | } |
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| 216 | } |
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| 217 | |||
| 218 | static void sd_1d97_int(int *p, int i0, int i1) |
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| 219 | { |
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| 220 | int i; |
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| 221 | |||
| 222 | if (i1 == i0 + 1) |
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| 223 | return; |
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| 224 | |||
| 225 | extend97_int(p, i0, i1); |
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| 226 | i0++; i1++; |
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| 227 | |||
| 228 | for (i = i0/2 - 2; i < i1/2 + 1; i++) |
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| 229 | p[2 * i + 1] -= (I_LFTG_ALPHA * (p[2 * i] + p[2 * i + 2]) + (1 << 15)) >> 16; |
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| 230 | for (i = i0/2 - 1; i < i1/2 + 1; i++) |
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| 231 | p[2 * i] -= (I_LFTG_BETA * (p[2 * i - 1] + p[2 * i + 1]) + (1 << 15)) >> 16; |
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| 232 | for (i = i0/2 - 1; i < i1/2; i++) |
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| 233 | p[2 * i + 1] += (I_LFTG_GAMMA * (p[2 * i] + p[2 * i + 2]) + (1 << 15)) >> 16; |
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| 234 | for (i = i0/2; i < i1/2; i++) |
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| 235 | p[2 * i] += (I_LFTG_DELTA * (p[2 * i - 1] + p[2 * i + 1]) + (1 << 15)) >> 16; |
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| 236 | } |
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| 237 | |||
| 238 | static void dwt_encode97_int(DWTContext *s, int *t) |
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| 239 | { |
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| 240 | int lev, |
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| 241 | w = s->linelen[s->ndeclevels-1][0]; |
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| 242 | int *line = s->i_linebuf; |
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| 243 | line += 5; |
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| 244 | |||
| 245 | for (lev = s->ndeclevels-1; lev >= 0; lev--){ |
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| 246 | int lh = s->linelen[lev][0], |
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| 247 | lv = s->linelen[lev][1], |
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| 248 | mh = s->mod[lev][0], |
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| 249 | mv = s->mod[lev][1], |
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| 250 | lp; |
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| 251 | int *l; |
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| 252 | |||
| 253 | // HOR_SD |
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| 254 | l = line + mh; |
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| 255 | for (lp = 0; lp < lv; lp++){ |
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| 256 | int i, j = 0; |
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| 257 | |||
| 258 | for (i = 0; i < lh; i++) |
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| 259 | l[i] = t[w*lp + i]; |
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| 260 | |||
| 261 | sd_1d97_int(line, mh, mh + lh); |
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| 262 | |||
| 263 | // copy back and deinterleave |
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| 264 | for (i = mh; i < lh; i+=2, j++) |
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| 265 | t[w*lp + j] = ((l[i] * I_LFTG_X) + (1 << 16)) >> 17; |
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| 266 | for (i = 1-mh; i < lh; i+=2, j++) |
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| 267 | t[w*lp + j] = ((l[i] * I_LFTG_K) + (1 << 16)) >> 17; |
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| 268 | } |
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| 269 | |||
| 270 | // VER_SD |
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| 271 | l = line + mv; |
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| 272 | for (lp = 0; lp < lh; lp++) { |
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| 273 | int i, j = 0; |
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| 274 | |||
| 275 | for (i = 0; i < lv; i++) |
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| 276 | l[i] = t[w*i + lp]; |
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| 277 | |||
| 278 | sd_1d97_int(line, mv, mv + lv); |
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| 279 | |||
| 280 | // copy back and deinterleave |
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| 281 | for (i = mv; i < lv; i+=2, j++) |
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| 282 | t[w*j + lp] = ((l[i] * I_LFTG_X) + (1 << 16)) >> 17; |
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| 283 | for (i = 1-mv; i < lv; i+=2, j++) |
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| 284 | t[w*j + lp] = ((l[i] * I_LFTG_K) + (1 << 16)) >> 17; |
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| 285 | } |
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| 286 | } |
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| 287 | } |
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| 288 | |||
| 289 | static void sr_1d53(int *p, int i0, int i1) |
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| 290 | { |
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| 291 | int i; |
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| 292 | |||
| 293 | if (i1 == i0 + 1) |
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| 294 | return; |
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| 295 | |||
| 296 | extend53(p, i0, i1); |
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| 297 | |||
| 298 | for (i = i0 / 2; i < i1 / 2 + 1; i++) |
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| 299 | p[2 * i] -= (p[2 * i - 1] + p[2 * i + 1] + 2) >> 2; |
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| 300 | for (i = i0 / 2; i < i1 / 2; i++) |
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| 301 | p[2 * i + 1] += (p[2 * i] + p[2 * i + 2]) >> 1; |
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| 302 | } |
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| 303 | |||
| 304 | static void dwt_decode53(DWTContext *s, int *t) |
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| 305 | { |
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| 306 | int lev; |
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| 307 | int w = s->linelen[s->ndeclevels - 1][0]; |
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| 308 | int32_t *line = s->i_linebuf; |
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| 309 | line += 3; |
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| 310 | |||
| 311 | for (lev = 0; lev < s->ndeclevels; lev++) { |
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| 312 | int lh = s->linelen[lev][0], |
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| 313 | lv = s->linelen[lev][1], |
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| 314 | mh = s->mod[lev][0], |
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| 315 | mv = s->mod[lev][1], |
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| 316 | lp; |
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| 317 | int *l; |
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| 318 | |||
| 319 | // HOR_SD |
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| 320 | l = line + mh; |
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| 321 | for (lp = 0; lp < lv; lp++) { |
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| 322 | int i, j = 0; |
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| 323 | // copy with interleaving |
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| 324 | for (i = mh; i < lh; i += 2, j++) |
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| 325 | l[i] = t[w * lp + j]; |
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| 326 | for (i = 1 - mh; i < lh; i += 2, j++) |
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| 327 | l[i] = t[w * lp + j]; |
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| 328 | |||
| 329 | sr_1d53(line, mh, mh + lh); |
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| 330 | |||
| 331 | for (i = 0; i < lh; i++) |
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| 332 | t[w * lp + i] = l[i]; |
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| 333 | } |
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| 334 | |||
| 335 | // VER_SD |
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| 336 | l = line + mv; |
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| 337 | for (lp = 0; lp < lh; lp++) { |
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| 338 | int i, j = 0; |
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| 339 | // copy with interleaving |
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| 340 | for (i = mv; i < lv; i += 2, j++) |
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| 341 | l[i] = t[w * j + lp]; |
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| 342 | for (i = 1 - mv; i < lv; i += 2, j++) |
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| 343 | l[i] = t[w * j + lp]; |
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| 344 | |||
| 345 | sr_1d53(line, mv, mv + lv); |
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| 346 | |||
| 347 | for (i = 0; i < lv; i++) |
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| 348 | t[w * i + lp] = l[i]; |
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| 349 | } |
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| 350 | } |
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| 351 | } |
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| 352 | |||
| 353 | static void sr_1d97_float(float *p, int i0, int i1) |
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| 354 | { |
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| 355 | int i; |
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| 356 | |||
| 357 | if (i1 == i0 + 1) |
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| 358 | return; |
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| 359 | |||
| 360 | extend97_float(p, i0, i1); |
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| 361 | |||
| 362 | for (i = i0 / 2 - 1; i < i1 / 2 + 2; i++) |
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| 363 | p[2 * i] -= F_LFTG_DELTA * (p[2 * i - 1] + p[2 * i + 1]); |
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| 364 | /* step 4 */ |
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| 365 | for (i = i0 / 2 - 1; i < i1 / 2 + 1; i++) |
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| 366 | p[2 * i + 1] -= F_LFTG_GAMMA * (p[2 * i] + p[2 * i + 2]); |
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| 367 | /*step 5*/ |
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| 368 | for (i = i0 / 2; i < i1 / 2 + 1; i++) |
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| 369 | p[2 * i] += F_LFTG_BETA * (p[2 * i - 1] + p[2 * i + 1]); |
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| 370 | /* step 6 */ |
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| 371 | for (i = i0 / 2; i < i1 / 2; i++) |
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| 372 | p[2 * i + 1] += F_LFTG_ALPHA * (p[2 * i] + p[2 * i + 2]); |
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| 373 | } |
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| 374 | |||
| 375 | static void dwt_decode97_float(DWTContext *s, float *t) |
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| 376 | { |
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| 377 | int lev; |
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| 378 | int w = s->linelen[s->ndeclevels - 1][0]; |
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| 379 | float *line = s->f_linebuf; |
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| 380 | float *data = t; |
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| 381 | /* position at index O of line range [0-5,w+5] cf. extend function */ |
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| 382 | line += 5; |
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| 383 | |||
| 384 | for (lev = 0; lev < s->ndeclevels; lev++) { |
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| 385 | int lh = s->linelen[lev][0], |
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| 386 | lv = s->linelen[lev][1], |
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| 387 | mh = s->mod[lev][0], |
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| 388 | mv = s->mod[lev][1], |
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| 389 | lp; |
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| 390 | float *l; |
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| 391 | // HOR_SD |
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| 392 | l = line + mh; |
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| 393 | for (lp = 0; lp < lv; lp++) { |
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| 394 | int i, j = 0; |
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| 395 | // copy with interleaving |
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| 396 | for (i = mh; i < lh; i += 2, j++) |
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| 397 | l[i] = data[w * lp + j] * F_LFTG_K; |
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| 398 | for (i = 1 - mh; i < lh; i += 2, j++) |
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| 399 | l[i] = data[w * lp + j] * F_LFTG_X; |
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| 400 | |||
| 401 | sr_1d97_float(line, mh, mh + lh); |
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| 402 | |||
| 403 | for (i = 0; i < lh; i++) |
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| 404 | data[w * lp + i] = l[i]; |
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| 405 | } |
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| 406 | |||
| 407 | // VER_SD |
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| 408 | l = line + mv; |
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| 409 | for (lp = 0; lp < lh; lp++) { |
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| 410 | int i, j = 0; |
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| 411 | // copy with interleaving |
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| 412 | for (i = mv; i < lv; i += 2, j++) |
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| 413 | l[i] = data[w * j + lp] * F_LFTG_K; |
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| 414 | for (i = 1 - mv; i < lv; i += 2, j++) |
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| 415 | l[i] = data[w * j + lp] * F_LFTG_X; |
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| 416 | |||
| 417 | sr_1d97_float(line, mv, mv + lv); |
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| 418 | |||
| 419 | for (i = 0; i < lv; i++) |
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| 420 | data[w * i + lp] = l[i]; |
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| 421 | } |
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| 422 | } |
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| 423 | } |
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| 424 | |||
| 425 | static void sr_1d97_int(int32_t *p, int i0, int i1) |
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| 426 | { |
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| 427 | int i; |
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| 428 | |||
| 429 | if (i1 == i0 + 1) |
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| 430 | return; |
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| 431 | |||
| 432 | extend97_int(p, i0, i1); |
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| 433 | |||
| 434 | for (i = i0 / 2 - 1; i < i1 / 2 + 2; i++) |
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| 435 | p[2 * i] -= (I_LFTG_DELTA * (p[2 * i - 1] + p[2 * i + 1]) + (1 << 15)) >> 16; |
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| 436 | /* step 4 */ |
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| 437 | for (i = i0 / 2 - 1; i < i1 / 2 + 1; i++) |
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| 438 | p[2 * i + 1] -= (I_LFTG_GAMMA * (p[2 * i] + p[2 * i + 2]) + (1 << 15)) >> 16; |
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| 439 | /*step 5*/ |
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| 440 | for (i = i0 / 2; i < i1 / 2 + 1; i++) |
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| 441 | p[2 * i] += (I_LFTG_BETA * (p[2 * i - 1] + p[2 * i + 1]) + (1 << 15)) >> 16; |
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| 442 | /* step 6 */ |
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| 443 | for (i = i0 / 2; i < i1 / 2; i++) |
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| 444 | p[2 * i + 1] += (I_LFTG_ALPHA * (p[2 * i] + p[2 * i + 2]) + (1 << 15)) >> 16; |
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| 445 | } |
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| 446 | |||
| 447 | static void dwt_decode97_int(DWTContext *s, int32_t *t) |
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| 448 | { |
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| 449 | int lev; |
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| 450 | int w = s->linelen[s->ndeclevels - 1][0]; |
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| 451 | int32_t *line = s->i_linebuf; |
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| 452 | int32_t *data = t; |
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| 453 | /* position at index O of line range [0-5,w+5] cf. extend function */ |
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| 454 | line += 5; |
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| 455 | |||
| 456 | for (lev = 0; lev < s->ndeclevels; lev++) { |
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| 457 | int lh = s->linelen[lev][0], |
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| 458 | lv = s->linelen[lev][1], |
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| 459 | mh = s->mod[lev][0], |
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| 460 | mv = s->mod[lev][1], |
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| 461 | lp; |
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| 462 | int32_t *l; |
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| 463 | // HOR_SD |
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| 464 | l = line + mh; |
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| 465 | for (lp = 0; lp < lv; lp++) { |
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| 466 | int i, j = 0; |
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| 467 | // rescale with interleaving |
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| 468 | for (i = mh; i < lh; i += 2, j++) |
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| 469 | l[i] = ((data[w * lp + j] * I_LFTG_K) + (1 << 15)) >> 16; |
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| 470 | for (i = 1 - mh; i < lh; i += 2, j++) |
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| 471 | l[i] = ((data[w * lp + j] * I_LFTG_X) + (1 << 15)) >> 16; |
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| 472 | |||
| 473 | sr_1d97_int(line, mh, mh + lh); |
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| 474 | |||
| 475 | for (i = 0; i < lh; i++) |
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| 476 | data[w * lp + i] = l[i]; |
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| 477 | } |
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| 478 | |||
| 479 | // VER_SD |
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| 480 | l = line + mv; |
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| 481 | for (lp = 0; lp < lh; lp++) { |
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| 482 | int i, j = 0; |
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| 483 | // rescale with interleaving |
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| 484 | for (i = mv; i < lv; i += 2, j++) |
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| 485 | l[i] = ((data[w * j + lp] * I_LFTG_K) + (1 << 15)) >> 16; |
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| 486 | for (i = 1 - mv; i < lv; i += 2, j++) |
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| 487 | l[i] = ((data[w * j + lp] * I_LFTG_X) + (1 << 15)) >> 16; |
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| 488 | |||
| 489 | sr_1d97_int(line, mv, mv + lv); |
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| 490 | |||
| 491 | for (i = 0; i < lv; i++) |
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| 492 | data[w * i + lp] = l[i]; |
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| 493 | } |
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| 494 | } |
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| 495 | } |
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| 496 | |||
| 497 | int ff_jpeg2000_dwt_init(DWTContext *s, uint16_t border[2][2], |
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| 498 | int decomp_levels, int type) |
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| 499 | { |
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| 500 | int i, j, lev = decomp_levels, maxlen, |
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| 501 | b[2][2]; |
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| 502 | |||
| 503 | s->ndeclevels = decomp_levels; |
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| 504 | s->type = type; |
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| 505 | |||
| 506 | for (i = 0; i < 2; i++) |
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| 507 | for (j = 0; j < 2; j++) |
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| 508 | b[i][j] = border[i][j]; |
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| 509 | |||
| 510 | maxlen = FFMAX(b[0][1] - b[0][0], |
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| 511 | b[1][1] - b[1][0]); |
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| 512 | while (--lev >= 0) |
||
| 513 | for (i = 0; i < 2; i++) { |
||
| 514 | s->linelen[lev][i] = b[i][1] - b[i][0]; |
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| 515 | s->mod[lev][i] = b[i][0] & 1; |
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| 516 | for (j = 0; j < 2; j++) |
||
| 517 | b[i][j] = (b[i][j] + 1) >> 1; |
||
| 518 | } |
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| 519 | switch (type) { |
||
| 520 | case FF_DWT97: |
||
| 521 | s->f_linebuf = av_malloc((maxlen + 12) * sizeof(*s->f_linebuf)); |
||
| 522 | if (!s->f_linebuf) |
||
| 523 | return AVERROR(ENOMEM); |
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| 524 | break; |
||
| 525 | case FF_DWT97_INT: |
||
| 526 | s->i_linebuf = av_malloc((maxlen + 12) * sizeof(*s->i_linebuf)); |
||
| 527 | if (!s->i_linebuf) |
||
| 528 | return AVERROR(ENOMEM); |
||
| 529 | break; |
||
| 530 | case FF_DWT53: |
||
| 531 | s->i_linebuf = av_malloc((maxlen + 6) * sizeof(*s->i_linebuf)); |
||
| 532 | if (!s->i_linebuf) |
||
| 533 | return AVERROR(ENOMEM); |
||
| 534 | break; |
||
| 535 | default: |
||
| 536 | return -1; |
||
| 537 | } |
||
| 538 | return 0; |
||
| 539 | } |
||
| 540 | |||
| 541 | int ff_dwt_encode(DWTContext *s, void *t) |
||
| 542 | { |
||
| 543 | switch(s->type){ |
||
| 544 | case FF_DWT97: |
||
| 545 | dwt_encode97_float(s, t); break; |
||
| 546 | case FF_DWT97_INT: |
||
| 547 | dwt_encode97_int(s, t); break; |
||
| 548 | case FF_DWT53: |
||
| 549 | dwt_encode53(s, t); break; |
||
| 550 | default: |
||
| 551 | return -1; |
||
| 552 | } |
||
| 553 | return 0; |
||
| 554 | } |
||
| 555 | |||
| 556 | int ff_dwt_decode(DWTContext *s, void *t) |
||
| 557 | { |
||
| 558 | switch (s->type) { |
||
| 559 | case FF_DWT97: |
||
| 560 | dwt_decode97_float(s, t); |
||
| 561 | break; |
||
| 562 | case FF_DWT97_INT: |
||
| 563 | dwt_decode97_int(s, t); |
||
| 564 | break; |
||
| 565 | case FF_DWT53: |
||
| 566 | dwt_decode53(s, t); |
||
| 567 | break; |
||
| 568 | default: |
||
| 569 | return -1; |
||
| 570 | } |
||
| 571 | return 0; |
||
| 572 | } |
||
| 573 | |||
| 574 | void ff_dwt_destroy(DWTContext *s) |
||
| 575 | { |
||
| 576 | av_freep(&s->f_linebuf); |
||
| 577 | av_freep(&s->i_linebuf); |
||
| 578 | } |