2 * Copyright (C) 2004-2010 Michael Niedermayer <michaelni@gmx.at>
3 * Copyright (C) 2008 David Conrad
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/attributes.h"
23 #include "libavutil/avassert.h"
24 #include "libavutil/common.h"
28 int ff_slice_buffer_init(slice_buffer *buf, int line_count,
29 int max_allocated_lines, int line_width,
30 IDWTELEM *base_buffer)
34 buf->base_buffer = base_buffer;
35 buf->line_count = line_count;
36 buf->line_width = line_width;
37 buf->data_count = max_allocated_lines;
38 buf->line = av_mallocz(sizeof(IDWTELEM *) * line_count);
40 return AVERROR(ENOMEM);
41 buf->data_stack = av_malloc(sizeof(IDWTELEM *) * max_allocated_lines);
42 if (!buf->data_stack) {
44 return AVERROR(ENOMEM);
47 for (i = 0; i < max_allocated_lines; i++) {
48 buf->data_stack[i] = av_malloc(sizeof(IDWTELEM) * line_width);
49 if (!buf->data_stack[i]) {
51 av_freep(&buf->data_stack[i]);
52 av_freep(&buf->data_stack);
54 return AVERROR(ENOMEM);
58 buf->data_stack_top = max_allocated_lines - 1;
62 IDWTELEM *ff_slice_buffer_load_line(slice_buffer *buf, int line)
66 av_assert0(buf->data_stack_top >= 0);
67 // av_assert1(!buf->line[line]);
69 return buf->line[line];
71 buffer = buf->data_stack[buf->data_stack_top];
72 buf->data_stack_top--;
73 buf->line[line] = buffer;
78 void ff_slice_buffer_release(slice_buffer *buf, int line)
82 av_assert1(line >= 0 && line < buf->line_count);
83 av_assert1(buf->line[line]);
85 buffer = buf->line[line];
86 buf->data_stack_top++;
87 buf->data_stack[buf->data_stack_top] = buffer;
88 buf->line[line] = NULL;
91 void ff_slice_buffer_flush(slice_buffer *buf)
94 for (i = 0; i < buf->line_count; i++)
96 ff_slice_buffer_release(buf, i);
99 void ff_slice_buffer_destroy(slice_buffer *buf)
102 ff_slice_buffer_flush(buf);
104 for (i = buf->data_count - 1; i >= 0; i--)
105 av_freep(&buf->data_stack[i]);
106 av_freep(&buf->data_stack);
107 av_freep(&buf->line);
110 static inline int mirror(int v, int m)
112 while ((unsigned)v > (unsigned)m) {
120 static av_always_inline void lift(DWTELEM *dst, DWTELEM *src, DWTELEM *ref,
121 int dst_step, int src_step, int ref_step,
122 int width, int mul, int add, int shift,
123 int highpass, int inverse)
125 const int mirror_left = !highpass;
126 const int mirror_right = (width & 1) ^ highpass;
127 const int w = (width >> 1) - 1 + (highpass & width);
130 #define LIFT(src, ref, inv) ((src) + ((inv) ? -(ref) : +(ref)))
132 dst[0] = LIFT(src[0], ((mul * 2 * ref[0] + add) >> shift), inverse);
137 for (i = 0; i < w; i++)
138 dst[i * dst_step] = LIFT(src[i * src_step],
139 ((mul * (ref[i * ref_step] +
140 ref[(i + 1) * ref_step]) +
145 dst[w * dst_step] = LIFT(src[w * src_step],
146 ((mul * 2 * ref[w * ref_step] + add) >> shift),
150 static av_always_inline void liftS(DWTELEM *dst, DWTELEM *src, DWTELEM *ref,
151 int dst_step, int src_step, int ref_step,
152 int width, int mul, int add, int shift,
153 int highpass, int inverse)
155 const int mirror_left = !highpass;
156 const int mirror_right = (width & 1) ^ highpass;
157 const int w = (width >> 1) - 1 + (highpass & width);
160 av_assert1(shift == 4);
161 #define LIFTS(src, ref, inv) \
162 ((inv) ? (src) + (((ref) + 4 * (src)) >> shift) \
163 : -((-16 * (src) + (ref) + add / \
164 4 + 1 + (5 << 25)) / (5 * 4) - (1 << 23)))
166 dst[0] = LIFTS(src[0], mul * 2 * ref[0] + add, inverse);
171 for (i = 0; i < w; i++)
172 dst[i * dst_step] = LIFTS(src[i * src_step],
173 mul * (ref[i * ref_step] +
174 ref[(i + 1) * ref_step]) + add,
178 dst[w * dst_step] = LIFTS(src[w * src_step],
179 mul * 2 * ref[w * ref_step] + add,
183 static void horizontal_decompose53i(DWTELEM *b, DWTELEM *temp, int width)
185 const int width2 = width >> 1;
187 const int w2 = (width + 1) >> 1;
189 for (x = 0; x < width2; x++) {
191 temp[x + w2] = b[2 * x + 1];
195 lift(b + w2, temp + w2, temp, 1, 1, 1, width, -1, 0, 1, 1, 0);
196 lift(b, temp, b + w2, 1, 1, 1, width, 1, 2, 2, 0, 0);
199 static void vertical_decompose53iH0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
204 for (i = 0; i < width; i++)
205 b1[i] -= (b0[i] + b2[i]) >> 1;
208 static void vertical_decompose53iL0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
213 for (i = 0; i < width; i++)
214 b1[i] += (b0[i] + b2[i] + 2) >> 2;
217 static void spatial_decompose53i(DWTELEM *buffer, DWTELEM *temp,
218 int width, int height, int stride)
221 DWTELEM *b0 = buffer + mirror(-2 - 1, height - 1) * stride;
222 DWTELEM *b1 = buffer + mirror(-2, height - 1) * stride;
224 for (y = -2; y < height; y += 2) {
225 DWTELEM *b2 = buffer + mirror(y + 1, height - 1) * stride;
226 DWTELEM *b3 = buffer + mirror(y + 2, height - 1) * stride;
228 if (y + 1 < (unsigned)height)
229 horizontal_decompose53i(b2, temp, width);
230 if (y + 2 < (unsigned)height)
231 horizontal_decompose53i(b3, temp, width);
233 if (y + 1 < (unsigned)height)
234 vertical_decompose53iH0(b1, b2, b3, width);
235 if (y + 0 < (unsigned)height)
236 vertical_decompose53iL0(b0, b1, b2, width);
243 static void horizontal_decompose97i(DWTELEM *b, DWTELEM *temp, int width)
245 const int w2 = (width + 1) >> 1;
247 lift(temp + w2, b + 1, b, 1, 2, 2, width, W_AM, W_AO, W_AS, 1, 1);
248 liftS(temp, b, temp + w2, 1, 2, 1, width, W_BM, W_BO, W_BS, 0, 0);
249 lift(b + w2, temp + w2, temp, 1, 1, 1, width, W_CM, W_CO, W_CS, 1, 0);
250 lift(b, temp, b + w2, 1, 1, 1, width, W_DM, W_DO, W_DS, 0, 0);
253 static void vertical_decompose97iH0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
258 for (i = 0; i < width; i++)
259 b1[i] -= (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS;
262 static void vertical_decompose97iH1(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
267 for (i = 0; i < width; i++)
268 b1[i] += (W_CM * (b0[i] + b2[i]) + W_CO) >> W_CS;
271 static void vertical_decompose97iL0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
276 for (i = 0; i < width; i++)
277 b1[i] = (16 * 4 * b1[i] - 4 * (b0[i] + b2[i]) + W_BO * 5 + (5 << 27)) /
278 (5 * 16) - (1 << 23);
281 static void vertical_decompose97iL1(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
286 for (i = 0; i < width; i++)
287 b1[i] += (W_DM * (b0[i] + b2[i]) + W_DO) >> W_DS;
290 static void spatial_decompose97i(DWTELEM *buffer, DWTELEM *temp,
291 int width, int height, int stride)
294 DWTELEM *b0 = buffer + mirror(-4 - 1, height - 1) * stride;
295 DWTELEM *b1 = buffer + mirror(-4, height - 1) * stride;
296 DWTELEM *b2 = buffer + mirror(-4 + 1, height - 1) * stride;
297 DWTELEM *b3 = buffer + mirror(-4 + 2, height - 1) * stride;
299 for (y = -4; y < height; y += 2) {
300 DWTELEM *b4 = buffer + mirror(y + 3, height - 1) * stride;
301 DWTELEM *b5 = buffer + mirror(y + 4, height - 1) * stride;
303 if (y + 3 < (unsigned)height)
304 horizontal_decompose97i(b4, temp, width);
305 if (y + 4 < (unsigned)height)
306 horizontal_decompose97i(b5, temp, width);
308 if (y + 3 < (unsigned)height)
309 vertical_decompose97iH0(b3, b4, b5, width);
310 if (y + 2 < (unsigned)height)
311 vertical_decompose97iL0(b2, b3, b4, width);
312 if (y + 1 < (unsigned)height)
313 vertical_decompose97iH1(b1, b2, b3, width);
314 if (y + 0 < (unsigned)height)
315 vertical_decompose97iL1(b0, b1, b2, width);
324 void ff_spatial_dwt(DWTELEM *buffer, DWTELEM *temp, int width, int height,
325 int stride, int type, int decomposition_count)
329 for (level = 0; level < decomposition_count; level++) {
332 spatial_decompose97i(buffer, temp,
333 width >> level, height >> level,
337 spatial_decompose53i(buffer, temp,
338 width >> level, height >> level,
345 static void horizontal_compose53i(IDWTELEM *b, IDWTELEM *temp, int width)
347 const int width2 = width >> 1;
348 const int w2 = (width + 1) >> 1;
351 for (x = 0; x < width2; x++) {
353 temp[2 * x + 1] = b[x + w2];
358 b[0] = temp[0] - ((temp[1] + 1) >> 1);
359 for (x = 2; x < width - 1; x += 2) {
360 b[x] = temp[x] - ((temp[x - 1] + temp[x + 1] + 2) >> 2);
361 b[x - 1] = temp[x - 1] + ((b[x - 2] + b[x] + 1) >> 1);
364 b[x] = temp[x] - ((temp[x - 1] + 1) >> 1);
365 b[x - 1] = temp[x - 1] + ((b[x - 2] + b[x] + 1) >> 1);
367 b[x - 1] = temp[x - 1] + b[x - 2];
370 static void vertical_compose53iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
375 for (i = 0; i < width; i++)
376 b1[i] += (b0[i] + b2[i]) >> 1;
379 static void vertical_compose53iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
384 for (i = 0; i < width; i++)
385 b1[i] -= (b0[i] + b2[i] + 2) >> 2;
388 static void spatial_compose53i_buffered_init(DWTCompose *cs, slice_buffer *sb,
389 int height, int stride_line)
391 cs->b0 = slice_buffer_get_line(sb,
392 mirror(-1 - 1, height - 1) * stride_line);
393 cs->b1 = slice_buffer_get_line(sb, mirror(-1, height - 1) * stride_line);
397 static void spatial_compose53i_init(DWTCompose *cs, IDWTELEM *buffer,
398 int height, int stride)
400 cs->b0 = buffer + mirror(-1 - 1, height - 1) * stride;
401 cs->b1 = buffer + mirror(-1, height - 1) * stride;
405 static void spatial_compose53i_dy_buffered(DWTCompose *cs, slice_buffer *sb,
407 int width, int height,
412 IDWTELEM *b0 = cs->b0;
413 IDWTELEM *b1 = cs->b1;
414 IDWTELEM *b2 = slice_buffer_get_line(sb,
415 mirror(y + 1, height - 1) *
417 IDWTELEM *b3 = slice_buffer_get_line(sb,
418 mirror(y + 2, height - 1) *
421 if (y + 1 < (unsigned)height && y < (unsigned)height) {
424 for (x = 0; x < width; x++) {
425 b2[x] -= (b1[x] + b3[x] + 2) >> 2;
426 b1[x] += (b0[x] + b2[x]) >> 1;
429 if (y + 1 < (unsigned)height)
430 vertical_compose53iL0(b1, b2, b3, width);
431 if (y + 0 < (unsigned)height)
432 vertical_compose53iH0(b0, b1, b2, width);
435 if (y - 1 < (unsigned)height)
436 horizontal_compose53i(b0, temp, width);
437 if (y + 0 < (unsigned)height)
438 horizontal_compose53i(b1, temp, width);
445 static void spatial_compose53i_dy(DWTCompose *cs, IDWTELEM *buffer,
446 IDWTELEM *temp, int width, int height,
450 IDWTELEM *b0 = cs->b0;
451 IDWTELEM *b1 = cs->b1;
452 IDWTELEM *b2 = buffer + mirror(y + 1, height - 1) * stride;
453 IDWTELEM *b3 = buffer + mirror(y + 2, height - 1) * stride;
455 if (y + 1 < (unsigned)height)
456 vertical_compose53iL0(b1, b2, b3, width);
457 if (y + 0 < (unsigned)height)
458 vertical_compose53iH0(b0, b1, b2, width);
460 if (y - 1 < (unsigned)height)
461 horizontal_compose53i(b0, temp, width);
462 if (y + 0 < (unsigned)height)
463 horizontal_compose53i(b1, temp, width);
470 void ff_snow_horizontal_compose97i(IDWTELEM *b, IDWTELEM *temp, int width)
472 const int w2 = (width + 1) >> 1;
475 temp[0] = b[0] - ((3 * b[w2] + 2) >> 2);
476 for (x = 1; x < (width >> 1); x++) {
477 temp[2 * x] = b[x] - ((3 * (b[x + w2 - 1] + b[x + w2]) + 4) >> 3);
478 temp[2 * x - 1] = b[x + w2 - 1] - temp[2 * x - 2] - temp[2 * x];
481 temp[2 * x] = b[x] - ((3 * b[x + w2 - 1] + 2) >> 2);
482 temp[2 * x - 1] = b[x + w2 - 1] - temp[2 * x - 2] - temp[2 * x];
484 temp[2 * x - 1] = b[x + w2 - 1] - 2 * temp[2 * x - 2];
486 b[0] = temp[0] + ((2 * temp[0] + temp[1] + 4) >> 3);
487 for (x = 2; x < width - 1; x += 2) {
488 b[x] = temp[x] + ((4 * temp[x] + temp[x - 1] + temp[x + 1] + 8) >> 4);
489 b[x - 1] = temp[x - 1] + ((3 * (b[x - 2] + b[x])) >> 1);
492 b[x] = temp[x] + ((2 * temp[x] + temp[x - 1] + 4) >> 3);
493 b[x - 1] = temp[x - 1] + ((3 * (b[x - 2] + b[x])) >> 1);
495 b[x - 1] = temp[x - 1] + 3 * b[x - 2];
498 static void vertical_compose97iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
503 for (i = 0; i < width; i++)
504 b1[i] += (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS;
507 static void vertical_compose97iH1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
512 for (i = 0; i < width; i++)
513 b1[i] -= (W_CM * (b0[i] + b2[i]) + W_CO) >> W_CS;
516 static void vertical_compose97iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
521 for (i = 0; i < width; i++)
522 b1[i] += (W_BM * (b0[i] + b2[i]) + 4 * b1[i] + W_BO) >> W_BS;
525 static void vertical_compose97iL1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
530 for (i = 0; i < width; i++)
531 b1[i] -= (W_DM * (b0[i] + b2[i]) + W_DO) >> W_DS;
534 void ff_snow_vertical_compose97i(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
535 IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
540 for (i = 0; i < width; i++) {
541 b4[i] -= (W_DM * (b3[i] + b5[i]) + W_DO) >> W_DS;
542 b3[i] -= (W_CM * (b2[i] + b4[i]) + W_CO) >> W_CS;
543 b2[i] += (W_BM * (b1[i] + b3[i]) + 4 * b2[i] + W_BO) >> W_BS;
544 b1[i] += (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS;
548 static void spatial_compose97i_buffered_init(DWTCompose *cs, slice_buffer *sb,
549 int height, int stride_line)
551 cs->b0 = slice_buffer_get_line(sb, mirror(-3 - 1, height - 1) * stride_line);
552 cs->b1 = slice_buffer_get_line(sb, mirror(-3, height - 1) * stride_line);
553 cs->b2 = slice_buffer_get_line(sb, mirror(-3 + 1, height - 1) * stride_line);
554 cs->b3 = slice_buffer_get_line(sb, mirror(-3 + 2, height - 1) * stride_line);
558 static void spatial_compose97i_init(DWTCompose *cs, IDWTELEM *buffer, int height,
561 cs->b0 = buffer + mirror(-3 - 1, height - 1) * stride;
562 cs->b1 = buffer + mirror(-3, height - 1) * stride;
563 cs->b2 = buffer + mirror(-3 + 1, height - 1) * stride;
564 cs->b3 = buffer + mirror(-3 + 2, height - 1) * stride;
568 static void spatial_compose97i_dy_buffered(SnowDWTContext *dsp, DWTCompose *cs,
569 slice_buffer * sb, IDWTELEM *temp,
570 int width, int height,
575 IDWTELEM *b0 = cs->b0;
576 IDWTELEM *b1 = cs->b1;
577 IDWTELEM *b2 = cs->b2;
578 IDWTELEM *b3 = cs->b3;
579 IDWTELEM *b4 = slice_buffer_get_line(sb,
580 mirror(y + 3, height - 1) *
582 IDWTELEM *b5 = slice_buffer_get_line(sb,
583 mirror(y + 4, height - 1) *
586 if (y > 0 && y + 4 < height) {
587 dsp->vertical_compose97i(b0, b1, b2, b3, b4, b5, width);
589 if (y + 3 < (unsigned)height)
590 vertical_compose97iL1(b3, b4, b5, width);
591 if (y + 2 < (unsigned)height)
592 vertical_compose97iH1(b2, b3, b4, width);
593 if (y + 1 < (unsigned)height)
594 vertical_compose97iL0(b1, b2, b3, width);
595 if (y + 0 < (unsigned)height)
596 vertical_compose97iH0(b0, b1, b2, width);
599 if (y - 1 < (unsigned)height)
600 dsp->horizontal_compose97i(b0, temp, width);
601 if (y + 0 < (unsigned)height)
602 dsp->horizontal_compose97i(b1, temp, width);
611 static void spatial_compose97i_dy(DWTCompose *cs, IDWTELEM *buffer,
612 IDWTELEM *temp, int width, int height,
616 IDWTELEM *b0 = cs->b0;
617 IDWTELEM *b1 = cs->b1;
618 IDWTELEM *b2 = cs->b2;
619 IDWTELEM *b3 = cs->b3;
620 IDWTELEM *b4 = buffer + mirror(y + 3, height - 1) * stride;
621 IDWTELEM *b5 = buffer + mirror(y + 4, height - 1) * stride;
623 if (y + 3 < (unsigned)height)
624 vertical_compose97iL1(b3, b4, b5, width);
625 if (y + 2 < (unsigned)height)
626 vertical_compose97iH1(b2, b3, b4, width);
627 if (y + 1 < (unsigned)height)
628 vertical_compose97iL0(b1, b2, b3, width);
629 if (y + 0 < (unsigned)height)
630 vertical_compose97iH0(b0, b1, b2, width);
632 if (y - 1 < (unsigned)height)
633 ff_snow_horizontal_compose97i(b0, temp, width);
634 if (y + 0 < (unsigned)height)
635 ff_snow_horizontal_compose97i(b1, temp, width);
644 void ff_spatial_idwt_buffered_init(DWTCompose *cs, slice_buffer *sb, int width,
645 int height, int stride_line, int type,
646 int decomposition_count)
649 for (level = decomposition_count - 1; level >= 0; level--) {
652 spatial_compose97i_buffered_init(cs + level, sb, height >> level,
653 stride_line << level);
656 spatial_compose53i_buffered_init(cs + level, sb, height >> level,
657 stride_line << level);
663 void ff_spatial_idwt_buffered_slice(SnowDWTContext *dsp, DWTCompose *cs,
664 slice_buffer *slice_buf, IDWTELEM *temp,
665 int width, int height, int stride_line,
666 int type, int decomposition_count, int y)
668 const int support = type == 1 ? 3 : 5;
673 for (level = decomposition_count - 1; level >= 0; level--)
674 while (cs[level].y <= FFMIN((y >> level) + support, height >> level)) {
677 spatial_compose97i_dy_buffered(dsp, cs + level, slice_buf, temp,
680 stride_line << level);
683 spatial_compose53i_dy_buffered(cs + level, slice_buf, temp,
686 stride_line << level);
692 static void ff_spatial_idwt_init(DWTCompose *cs, IDWTELEM *buffer, int width,
693 int height, int stride, int type,
694 int decomposition_count)
697 for (level = decomposition_count - 1; level >= 0; level--) {
700 spatial_compose97i_init(cs + level, buffer, height >> level,
704 spatial_compose53i_init(cs + level, buffer, height >> level,
711 static void ff_spatial_idwt_slice(DWTCompose *cs, IDWTELEM *buffer,
712 IDWTELEM *temp, int width, int height,
713 int stride, int type,
714 int decomposition_count, int y)
716 const int support = type == 1 ? 3 : 5;
721 for (level = decomposition_count - 1; level >= 0; level--)
722 while (cs[level].y <= FFMIN((y >> level) + support, height >> level)) {
725 spatial_compose97i_dy(cs + level, buffer, temp, width >> level,
726 height >> level, stride << level);
729 spatial_compose53i_dy(cs + level, buffer, temp, width >> level,
730 height >> level, stride << level);
736 void ff_spatial_idwt(IDWTELEM *buffer, IDWTELEM *temp, int width, int height,
737 int stride, int type, int decomposition_count)
739 DWTCompose cs[MAX_DECOMPOSITIONS];
741 ff_spatial_idwt_init(cs, buffer, width, height, stride, type,
742 decomposition_count);
743 for (y = 0; y < height; y += 4)
744 ff_spatial_idwt_slice(cs, buffer, temp, width, height, stride, type,
745 decomposition_count, y);
748 static inline int w_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size,
749 int w, int h, int type)
752 const int dec_count = w == 8 ? 3 : 4;
753 int tmp[32 * 32], tmp2[32];
755 static const int scale[2][2][4][4] = {
758 { 268, 239, 239, 213 },
759 { 0, 224, 224, 152 },
760 { 0, 135, 135, 110 },
762 { // 9/7 16x16 or 32x32 dec=4
763 { 344, 310, 310, 280 },
764 { 0, 320, 320, 228 },
765 { 0, 175, 175, 136 },
766 { 0, 129, 129, 102 },
771 { 275, 245, 245, 218 },
772 { 0, 230, 230, 156 },
773 { 0, 138, 138, 113 },
775 { // 5/3 16x16 or 32x32 dec=4
776 { 352, 317, 317, 286 },
777 { 0, 328, 328, 233 },
778 { 0, 180, 180, 140 },
779 { 0, 132, 132, 105 },
784 for (i = 0; i < h; i++) {
785 for (j = 0; j < w; j += 4) {
786 tmp[32 * i + j + 0] = (pix1[j + 0] - pix2[j + 0]) << 4;
787 tmp[32 * i + j + 1] = (pix1[j + 1] - pix2[j + 1]) << 4;
788 tmp[32 * i + j + 2] = (pix1[j + 2] - pix2[j + 2]) << 4;
789 tmp[32 * i + j + 3] = (pix1[j + 3] - pix2[j + 3]) << 4;
795 ff_spatial_dwt(tmp, tmp2, w, h, 32, type, dec_count);
799 for (level = 0; level < dec_count; level++)
800 for (ori = level ? 1 : 0; ori < 4; ori++) {
801 int size = w >> (dec_count - level);
802 int sx = (ori & 1) ? size : 0;
803 int stride = 32 << (dec_count - level);
804 int sy = (ori & 2) ? stride >> 1 : 0;
806 for (i = 0; i < size; i++)
807 for (j = 0; j < size; j++) {
808 int v = tmp[sx + sy + i * stride + j] *
809 scale[type][dec_count - 3][level][ori];
817 static int w53_8_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
819 return w_c(v, pix1, pix2, line_size, 8, h, 1);
822 static int w97_8_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
824 return w_c(v, pix1, pix2, line_size, 8, h, 0);
827 static int w53_16_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
829 return w_c(v, pix1, pix2, line_size, 16, h, 1);
832 static int w97_16_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
834 return w_c(v, pix1, pix2, line_size, 16, h, 0);
837 int ff_w53_32_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
839 return w_c(v, pix1, pix2, line_size, 32, h, 1);
842 int ff_w97_32_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
844 return w_c(v, pix1, pix2, line_size, 32, h, 0);
847 void ff_dsputil_init_dwt(DSPContext *c)
849 c->w53[0] = w53_16_c;
851 c->w97[0] = w97_16_c;
855 void ff_dwt_init(SnowDWTContext *c)
857 c->vertical_compose97i = ff_snow_vertical_compose97i;
858 c->horizontal_compose97i = ff_snow_horizontal_compose97i;
859 c->inner_add_yblock = ff_snow_inner_add_yblock;