2 * Discrete wavelet transform
3 * Copyright (c) 2007 Kamil Nowosad
4 * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 * Discrete wavelet transform
28 #include "libavutil/avassert.h"
29 #include "libavutil/common.h"
30 #include "libavutil/mem.h"
31 #include "jpeg2000dwt.h"
34 /* Defines for 9/7 DWT lifting parameters.
35 * Parameters are in float. */
36 #define F_LFTG_ALPHA 1.586134342059924f
37 #define F_LFTG_BETA 0.052980118572961f
38 #define F_LFTG_GAMMA 0.882911075530934f
39 #define F_LFTG_DELTA 0.443506852043971f
40 #define F_LFTG_K 1.230174104914001f
41 #define F_LFTG_X 1.625732422f
42 /* FIXME: Why use 1.625732422 instead of 1/F_LFTG_K?
43 * Incorrect value in JPEG2000 norm.
44 * see (ISO/IEC 15444:1 (version 2002) F.3.8.2 */
46 /* Lifting parameters in integer format.
47 * Computed as param = (float param) * (1 << 16) */
48 #define I_LFTG_ALPHA 103949
49 #define I_LFTG_BETA 3472
50 #define I_LFTG_GAMMA 57862
51 #define I_LFTG_DELTA 29066
52 #define I_LFTG_K 80621
53 #define I_LFTG_X 106544
55 static inline void extend53(int *p, int i0, int i1)
57 p[i0 - 1] = p[i0 + 1];
59 p[i0 - 2] = p[i0 + 2];
60 p[i1 + 1] = p[i1 - 3];
63 static inline void extend97_float(float *p, int i0, int i1)
67 for (i = 1; i <= 4; i++) {
68 p[i0 - i] = p[i0 + i];
69 p[i1 + i - 1] = p[i1 - i - 1];
73 static inline void extend97_int(int32_t *p, int i0, int i1)
77 for (i = 1; i <= 4; i++) {
78 p[i0 - i] = p[i0 + i];
79 p[i1 + i - 1] = p[i1 - i - 1];
83 static void sd_1d53(int *p, int i0, int i1)
92 for (i = (i0+1)/2 - 1; i < (i1+1)/2; i++)
93 p[2*i+1] -= (p[2*i] + p[2*i+2]) >> 1;
94 for (i = (i0+1)/2; i < (i1+1)/2; i++)
95 p[2*i] += (p[2*i-1] + p[2*i+1] + 2) >> 2;
98 static void dwt_encode53(DWTContext *s, int *t)
101 w = s->linelen[s->ndeclevels-1][0];
102 int *line = s->i_linebuf;
105 for (lev = s->ndeclevels-1; lev >= 0; lev--){
106 int lh = s->linelen[lev][0],
107 lv = s->linelen[lev][1],
113 av_assert1(!mh && !mv);
116 for (lp = 0; lp < lv; lp++){
119 for (i = 0; i < lh; i++)
122 sd_1d53(line, mh, mh + lh);
124 // copy back and deinterleave
125 for (i = mh; i < lh; i+=2, j++)
127 for (i = 1-mh; i < lh; i+=2, j++)
133 for (lp = 0; lp < lh; lp++) {
136 for (i = 0; i < lv; i++)
139 sd_1d53(line, mv, mv + lv);
141 // copy back and deinterleave
142 for (i = mv; i < lv; i+=2, j++)
144 for (i = 1-mv; i < lv; i+=2, j++)
149 static void sd_1d97_float(float *p, int i0, int i1)
161 extend97_float(p, i0, i1);
164 for (i = i0/2 - 2; i < i1/2 + 1; i++)
165 p[2*i+1] -= 1.586134 * (p[2*i] + p[2*i+2]);
166 for (i = i0/2 - 1; i < i1/2 + 1; i++)
167 p[2*i] -= 0.052980 * (p[2*i-1] + p[2*i+1]);
168 for (i = i0/2 - 1; i < i1/2; i++)
169 p[2*i+1] += 0.882911 * (p[2*i] + p[2*i+2]);
170 for (i = i0/2; i < i1/2; i++)
171 p[2*i] += 0.443506 * (p[2*i-1] + p[2*i+1]);
174 static void dwt_encode97_float(DWTContext *s, float *t)
177 w = s->linelen[s->ndeclevels-1][0];
178 float *line = s->f_linebuf;
181 for (lev = s->ndeclevels-1; lev >= 0; lev--){
182 int lh = s->linelen[lev][0],
183 lv = s->linelen[lev][1],
189 av_assert1(!mh && !mv);
192 for (lp = 0; lp < lv; lp++){
195 for (i = 0; i < lh; i++)
198 sd_1d97_float(line, mh, mh + lh);
200 // copy back and deinterleave
201 for (i = mh; i < lh; i+=2, j++)
202 t[w*lp + j] = F_LFTG_X * l[i] / 2;
203 for (i = 1-mh; i < lh; i+=2, j++)
204 t[w*lp + j] = F_LFTG_K * l[i] / 2;
209 for (lp = 0; lp < lh; lp++) {
212 for (i = 0; i < lv; i++)
215 sd_1d97_float(line, mv, mv + lv);
217 // copy back and deinterleave
218 for (i = mv; i < lv; i+=2, j++)
219 t[w*j + lp] = F_LFTG_X * l[i] / 2;
220 for (i = 1-mv; i < lv; i+=2, j++)
221 t[w*j + lp] = F_LFTG_K * l[i] / 2;
226 static void sd_1d97_int(int *p, int i0, int i1)
232 p[1] = (p[1] * I_LFTG_X + (1<<15)) >> 16;
234 p[0] = (p[0] * I_LFTG_K + (1<<15)) >> 16;
238 extend97_int(p, i0, i1);
241 for (i = i0/2 - 2; i < i1/2 + 1; i++)
242 p[2 * i + 1] -= (I_LFTG_ALPHA * (p[2 * i] + p[2 * i + 2]) + (1 << 15)) >> 16;
243 for (i = i0/2 - 1; i < i1/2 + 1; i++)
244 p[2 * i] -= (I_LFTG_BETA * (p[2 * i - 1] + p[2 * i + 1]) + (1 << 15)) >> 16;
245 for (i = i0/2 - 1; i < i1/2; i++)
246 p[2 * i + 1] += (I_LFTG_GAMMA * (p[2 * i] + p[2 * i + 2]) + (1 << 15)) >> 16;
247 for (i = i0/2; i < i1/2; i++)
248 p[2 * i] += (I_LFTG_DELTA * (p[2 * i - 1] + p[2 * i + 1]) + (1 << 15)) >> 16;
251 static void dwt_encode97_int(DWTContext *s, int *t)
254 w = s->linelen[s->ndeclevels-1][0];
255 int *line = s->i_linebuf;
258 for (lev = s->ndeclevels-1; lev >= 0; lev--){
259 int lh = s->linelen[lev][0],
260 lv = s->linelen[lev][1],
266 av_assert1(!mh && !mv);
270 for (lp = 0; lp < lv; lp++){
273 for (i = 0; i < lh; i++)
276 sd_1d97_int(line, mh, mh + lh);
278 // copy back and deinterleave
279 for (i = mh; i < lh; i+=2, j++)
280 t[w*lp + j] = ((l[i] * I_LFTG_X) + (1 << 16)) >> 17;
281 for (i = 1-mh; i < lh; i+=2, j++)
282 t[w*lp + j] = ((l[i] * I_LFTG_K) + (1 << 16)) >> 17;
287 for (lp = 0; lp < lh; lp++) {
290 for (i = 0; i < lv; i++)
293 sd_1d97_int(line, mv, mv + lv);
295 // copy back and deinterleave
296 for (i = mv; i < lv; i+=2, j++)
297 t[w*j + lp] = ((l[i] * I_LFTG_X) + (1 << 16)) >> 17;
298 for (i = 1-mv; i < lv; i+=2, j++)
299 t[w*j + lp] = ((l[i] * I_LFTG_K) + (1 << 16)) >> 17;
304 static void sr_1d53(int *p, int i0, int i1)
316 for (i = i0 / 2; i < i1 / 2 + 1; i++)
317 p[2 * i] -= (p[2 * i - 1] + p[2 * i + 1] + 2) >> 2;
318 for (i = i0 / 2; i < i1 / 2; i++)
319 p[2 * i + 1] += (p[2 * i] + p[2 * i + 2]) >> 1;
322 static void dwt_decode53(DWTContext *s, int *t)
325 int w = s->linelen[s->ndeclevels - 1][0];
326 int32_t *line = s->i_linebuf;
329 for (lev = 0; lev < s->ndeclevels; lev++) {
330 int lh = s->linelen[lev][0],
331 lv = s->linelen[lev][1],
339 for (lp = 0; lp < lv; lp++) {
341 // copy with interleaving
342 for (i = mh; i < lh; i += 2, j++)
343 l[i] = t[w * lp + j];
344 for (i = 1 - mh; i < lh; i += 2, j++)
345 l[i] = t[w * lp + j];
347 sr_1d53(line, mh, mh + lh);
349 for (i = 0; i < lh; i++)
350 t[w * lp + i] = l[i];
355 for (lp = 0; lp < lh; lp++) {
357 // copy with interleaving
358 for (i = mv; i < lv; i += 2, j++)
359 l[i] = t[w * j + lp];
360 for (i = 1 - mv; i < lv; i += 2, j++)
361 l[i] = t[w * j + lp];
363 sr_1d53(line, mv, mv + lv);
365 for (i = 0; i < lv; i++)
366 t[w * i + lp] = l[i];
371 static void sr_1d97_float(float *p, int i0, int i1)
383 extend97_float(p, i0, i1);
385 for (i = i0 / 2 - 1; i < i1 / 2 + 2; i++)
386 p[2 * i] -= F_LFTG_DELTA * (p[2 * i - 1] + p[2 * i + 1]);
388 for (i = i0 / 2 - 1; i < i1 / 2 + 1; i++)
389 p[2 * i + 1] -= F_LFTG_GAMMA * (p[2 * i] + p[2 * i + 2]);
391 for (i = i0 / 2; i < i1 / 2 + 1; i++)
392 p[2 * i] += F_LFTG_BETA * (p[2 * i - 1] + p[2 * i + 1]);
394 for (i = i0 / 2; i < i1 / 2; i++)
395 p[2 * i + 1] += F_LFTG_ALPHA * (p[2 * i] + p[2 * i + 2]);
398 static void dwt_decode97_float(DWTContext *s, float *t)
401 int w = s->linelen[s->ndeclevels - 1][0];
402 float *line = s->f_linebuf;
404 /* position at index O of line range [0-5,w+5] cf. extend function */
407 for (lev = 0; lev < s->ndeclevels; lev++) {
408 int lh = s->linelen[lev][0],
409 lv = s->linelen[lev][1],
416 for (lp = 0; lp < lv; lp++) {
418 // copy with interleaving
419 for (i = mh; i < lh; i += 2, j++)
420 l[i] = data[w * lp + j] * F_LFTG_K;
421 for (i = 1 - mh; i < lh; i += 2, j++)
422 l[i] = data[w * lp + j] * F_LFTG_X;
424 sr_1d97_float(line, mh, mh + lh);
426 for (i = 0; i < lh; i++)
427 data[w * lp + i] = l[i];
432 for (lp = 0; lp < lh; lp++) {
434 // copy with interleaving
435 for (i = mv; i < lv; i += 2, j++)
436 l[i] = data[w * j + lp] * F_LFTG_K;
437 for (i = 1 - mv; i < lv; i += 2, j++)
438 l[i] = data[w * j + lp] * F_LFTG_X;
440 sr_1d97_float(line, mv, mv + lv);
442 for (i = 0; i < lv; i++)
443 data[w * i + lp] = l[i];
448 static void sr_1d97_int(int32_t *p, int i0, int i1)
454 p[1] = (p[1] * I_LFTG_K + (1<<16)) >> 17;
456 p[0] = (p[0] * I_LFTG_X + (1<<16)) >> 17;
460 extend97_int(p, i0, i1);
462 for (i = i0 / 2 - 1; i < i1 / 2 + 2; i++)
463 p[2 * i] -= (I_LFTG_DELTA * (p[2 * i - 1] + p[2 * i + 1]) + (1 << 15)) >> 16;
465 for (i = i0 / 2 - 1; i < i1 / 2 + 1; i++)
466 p[2 * i + 1] -= (I_LFTG_GAMMA * (p[2 * i] + p[2 * i + 2]) + (1 << 15)) >> 16;
468 for (i = i0 / 2; i < i1 / 2 + 1; i++)
469 p[2 * i] += (I_LFTG_BETA * (p[2 * i - 1] + p[2 * i + 1]) + (1 << 15)) >> 16;
471 for (i = i0 / 2; i < i1 / 2; i++)
472 p[2 * i + 1] += (I_LFTG_ALPHA * (p[2 * i] + p[2 * i + 2]) + (1 << 15)) >> 16;
475 static void dwt_decode97_int(DWTContext *s, int32_t *t)
478 int w = s->linelen[s->ndeclevels - 1][0];
479 int32_t *line = s->i_linebuf;
481 /* position at index O of line range [0-5,w+5] cf. extend function */
484 for (lev = 0; lev < s->ndeclevels; lev++) {
485 int lh = s->linelen[lev][0],
486 lv = s->linelen[lev][1],
493 for (lp = 0; lp < lv; lp++) {
495 // rescale with interleaving
496 for (i = mh; i < lh; i += 2, j++)
497 l[i] = ((data[w * lp + j] * I_LFTG_K) + (1 << 15)) >> 16;
498 for (i = 1 - mh; i < lh; i += 2, j++)
499 l[i] = ((data[w * lp + j] * I_LFTG_X) + (1 << 15)) >> 16;
501 sr_1d97_int(line, mh, mh + lh);
503 for (i = 0; i < lh; i++)
504 data[w * lp + i] = l[i];
509 for (lp = 0; lp < lh; lp++) {
511 // rescale with interleaving
512 for (i = mv; i < lv; i += 2, j++)
513 l[i] = ((data[w * j + lp] * I_LFTG_K) + (1 << 15)) >> 16;
514 for (i = 1 - mv; i < lv; i += 2, j++)
515 l[i] = ((data[w * j + lp] * I_LFTG_X) + (1 << 15)) >> 16;
517 sr_1d97_int(line, mv, mv + lv);
519 for (i = 0; i < lv; i++)
520 data[w * i + lp] = l[i];
525 int ff_jpeg2000_dwt_init(DWTContext *s, uint16_t border[2][2],
526 int decomp_levels, int type)
528 int i, j, lev = decomp_levels, maxlen,
531 s->ndeclevels = decomp_levels;
534 for (i = 0; i < 2; i++)
535 for (j = 0; j < 2; j++)
536 b[i][j] = border[i][j];
538 maxlen = FFMAX(b[0][1] - b[0][0],
541 for (i = 0; i < 2; i++) {
542 s->linelen[lev][i] = b[i][1] - b[i][0];
543 s->mod[lev][i] = b[i][0] & 1;
544 for (j = 0; j < 2; j++)
545 b[i][j] = (b[i][j] + 1) >> 1;
549 s->f_linebuf = av_malloc_array((maxlen + 12), sizeof(*s->f_linebuf));
551 return AVERROR(ENOMEM);
554 s->i_linebuf = av_malloc_array((maxlen + 12), sizeof(*s->i_linebuf));
556 return AVERROR(ENOMEM);
559 s->i_linebuf = av_malloc_array((maxlen + 6), sizeof(*s->i_linebuf));
561 return AVERROR(ENOMEM);
569 int ff_dwt_encode(DWTContext *s, void *t)
573 dwt_encode97_float(s, t); break;
575 dwt_encode97_int(s, t); break;
577 dwt_encode53(s, t); break;
584 int ff_dwt_decode(DWTContext *s, void *t)
588 dwt_decode97_float(s, t);
591 dwt_decode97_int(s, t);
602 void ff_dwt_destroy(DWTContext *s)
604 av_freep(&s->f_linebuf);
605 av_freep(&s->i_linebuf);