FFmpeg: libavcodec/snow_dwt.c Source File

FFmpeg
snow_dwt.c
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1 /*
2  * Copyright (C) 2004-2010 Michael Niedermayer <michaelni@gmx.at>
3  * Copyright (C) 2008 David Conrad
4  *
5  * This file is part of FFmpeg.
6  *
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.
11  *
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.
16  *
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
20  */
21 
22 #include "libavutil/attributes.h"
23 #include "libavutil/avassert.h"
24 #include "libavutil/common.h"
25 #include "me_cmp.h"
26 #include "snow_dwt.h"
27 
28  int ff_slice_buffer_init(slice_buffer *buf, int line_count,
29  int max_allocated_lines, int line_width,
30  IDWTELEM *base_buffer)
31 {
32  int i;
33 
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_calloc(line_count, sizeof(*buf->line));
39  if (!buf->line)
40  return AVERROR(ENOMEM);
41  buf->data_stack = av_malloc_array(max_allocated_lines, sizeof(IDWTELEM *));
42  if (!buf->data_stack) {
43  av_freep(&buf->line);
44  return AVERROR(ENOMEM);
45  }
46 
47  for (i = 0; i < max_allocated_lines; i++) {
48  buf->data_stack[i] = av_malloc_array(line_width, sizeof(IDWTELEM));
49  if (!buf->data_stack[i]) {
50  for (i--; i >=0; i--)
51  av_freep(&buf->data_stack[i]);
52  av_freep(&buf->data_stack);
53  av_freep(&buf->line);
54  return AVERROR(ENOMEM);
55  }
56  }
57 
58  buf->data_stack_top = max_allocated_lines - 1;
59  return 0;
60 }
61 
62  IDWTELEM *ff_slice_buffer_load_line(slice_buffer *buf, int line)
63 {
64  IDWTELEM *buffer;
65 
66  av_assert0(buf->data_stack_top >= 0);
67 // av_assert1(!buf->line[line]);
68  if (buf->line[line])
69  return buf->line[line];
70 
71  buffer = buf->data_stack[buf->data_stack_top];
72  buf->data_stack_top--;
73  buf->line[line] = buffer;
74 
75  return buffer;
76 }
77 
78  void ff_slice_buffer_release(slice_buffer *buf, int line)
79 {
80  IDWTELEM *buffer;
81 
82  av_assert1(line >= 0 && line < buf->line_count);
83  av_assert1(buf->line[line]);
84 
85  buffer = buf->line[line];
86  buf->data_stack_top++;
87  buf->data_stack[buf->data_stack_top] = buffer;
88  buf->line[line] = NULL;
89 }
90 
91  void ff_slice_buffer_flush(slice_buffer *buf)
92 {
93  int i;
94 
95  if (!buf->line)
96  return;
97 
98  for (i = 0; i < buf->line_count; i++)
99  if (buf->line[i])
100  ff_slice_buffer_release(buf, i);
101 }
102 
103  void ff_slice_buffer_destroy(slice_buffer *buf)
104 {
105  int i;
106  ff_slice_buffer_flush(buf);
107 
108  if (buf->data_stack)
109  for (i = buf->data_count - 1; i >= 0; i--)
110  av_freep(&buf->data_stack[i]);
111  av_freep(&buf->data_stack);
112  av_freep(&buf->line);
113 }
114 
115  static av_always_inline void lift(DWTELEM *dst, DWTELEM *src, DWTELEM *ref,
116  int dst_step, int src_step, int ref_step,
117  int width, int mul, int add, int shift,
118  int highpass, int inverse)
119 {
120  const int mirror_left = !highpass;
121  const int mirror_right = (width & 1) ^ highpass;
122  const int w = (width >> 1) - 1 + (highpass & width);
123  int i;
124 
125 #define LIFT(src, ref, inv) ((src) + ((inv) ? -(ref) : +(ref)))
126  if (mirror_left) {
127  dst[0] = LIFT(src[0], ((mul * 2 * ref[0] + add) >> shift), inverse);
128  dst += dst_step;
129  src += src_step;
130  }
131 
132  for (i = 0; i < w; i++)
133  dst[i * dst_step] = LIFT(src[i * src_step],
134  ((mul * (ref[i * ref_step] +
135  ref[(i + 1) * ref_step]) +
136  add) >> shift),
137  inverse);
138 
139  if (mirror_right)
140  dst[w * dst_step] = LIFT(src[w * src_step],
141  ((mul * 2 * ref[w * ref_step] + add) >> shift),
142  inverse);
143 }
144 
145  static av_always_inline void liftS(DWTELEM *dst, DWTELEM *src, DWTELEM *ref,
146  int dst_step, int src_step, int ref_step,
147  int width, int mul, int add, int shift,
148  int highpass, int inverse)
149 {
150  const int mirror_left = !highpass;
151  const int mirror_right = (width & 1) ^ highpass;
152  const int w = (width >> 1) - 1 + (highpass & width);
153  int i;
154 
155  av_assert1(shift == 4);
156 #define LIFTS(src, ref, inv) \
157  ((inv) ? (src) + (((ref) + 4 * (src)) >> shift) \
158  : -((-16 * (src) + (ref) + add / \
159  4 + 1 + (5 << 25)) / (5 * 4) - (1 << 23)))
160  if (mirror_left) {
161  dst[0] = LIFTS(src[0], mul * 2 * ref[0] + add, inverse);
162  dst += dst_step;
163  src += src_step;
164  }
165 
166  for (i = 0; i < w; i++)
167  dst[i * dst_step] = LIFTS(src[i * src_step],
168  mul * (ref[i * ref_step] +
169  ref[(i + 1) * ref_step]) + add,
170  inverse);
171 
172  if (mirror_right)
173  dst[w * dst_step] = LIFTS(src[w * src_step],
174  mul * 2 * ref[w * ref_step] + add,
175  inverse);
176 }
177 
178  static void horizontal_decompose53i(DWTELEM *b, DWTELEM *temp, int width)
179 {
180  const int width2 = width >> 1;
181  int x;
182  const int w2 = (width + 1) >> 1;
183 
184  for (x = 0; x < width2; x++) {
185  temp[x] = b[2 * x];
186  temp[x + w2] = b[2 * x + 1];
187  }
188  if (width & 1)
189  temp[x] = b[2 * x];
190  lift(b + w2, temp + w2, temp, 1, 1, 1, width, -1, 0, 1, 1, 0);
191  lift(b, temp, b + w2, 1, 1, 1, width, 1, 2, 2, 0, 0);
192 }
193 
194  static void vertical_decompose53iH0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
195  int width)
196 {
197  int i;
198 
199  for (i = 0; i < width; i++)
200  b1[i] -= (b0[i] + b2[i]) >> 1;
201 }
202 
203  static void vertical_decompose53iL0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
204  int width)
205 {
206  int i;
207 
208  for (i = 0; i < width; i++)
209  b1[i] += (b0[i] + b2[i] + 2) >> 2;
210 }
211 
212  static void spatial_decompose53i(DWTELEM *buffer, DWTELEM *temp,
213  int width, int height, int stride)
214 {
215  int y;
216  DWTELEM *b0 = buffer + avpriv_mirror(-2 - 1, height - 1) * stride;
217  DWTELEM *b1 = buffer + avpriv_mirror(-2, height - 1) * stride;
218 
219  for (y = -2; y < height; y += 2) {
220  DWTELEM *b2 = buffer + avpriv_mirror(y + 1, height - 1) * stride;
221  DWTELEM *b3 = buffer + avpriv_mirror(y + 2, height - 1) * stride;
222 
223  if (y + 1 < (unsigned)height)
224  horizontal_decompose53i(b2, temp, width);
225  if (y + 2 < (unsigned)height)
226  horizontal_decompose53i(b3, temp, width);
227 
228  if (y + 1 < (unsigned)height)
229  vertical_decompose53iH0(b1, b2, b3, width);
230  if (y + 0 < (unsigned)height)
231  vertical_decompose53iL0(b0, b1, b2, width);
232 
233  b0 = b2;
234  b1 = b3;
235  }
236 }
237 
238  static void horizontal_decompose97i(DWTELEM *b, DWTELEM *temp, int width)
239 {
240  const int w2 = (width + 1) >> 1;
241 
242  lift(temp + w2, b + 1, b, 1, 2, 2, width, W_AM, W_AO, W_AS, 1, 1);
243  liftS(temp, b, temp + w2, 1, 2, 1, width, W_BM, W_BO, W_BS, 0, 0);
244  lift(b + w2, temp + w2, temp, 1, 1, 1, width, W_CM, W_CO, W_CS, 1, 0);
245  lift(b, temp, b + w2, 1, 1, 1, width, W_DM, W_DO, W_DS, 0, 0);
246 }
247 
248  static void vertical_decompose97iH0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
249  int width)
250 {
251  int i;
252 
253  for (i = 0; i < width; i++)
254  b1[i] -= (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS;
255 }
256 
257  static void vertical_decompose97iH1(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
258  int width)
259 {
260  int i;
261 
262  for (i = 0; i < width; i++)
263  b1[i] += (W_CM * (b0[i] + b2[i]) + W_CO) >> W_CS;
264 }
265 
266  static void vertical_decompose97iL0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
267  int width)
268 {
269  int i;
270 
271  for (i = 0; i < width; i++)
272  b1[i] = (16 * 4 * b1[i] - 4 * (b0[i] + b2[i]) + W_BO * 5 + (5 << 27)) /
273  (5 * 16) - (1 << 23);
274 }
275 
276  static void vertical_decompose97iL1(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
277  int width)
278 {
279  int i;
280 
281  for (i = 0; i < width; i++)
282  b1[i] += (W_DM * (b0[i] + b2[i]) + W_DO) >> W_DS;
283 }
284 
285  static void spatial_decompose97i(DWTELEM *buffer, DWTELEM *temp,
286  int width, int height, int stride)
287 {
288  int y;
289  DWTELEM *b0 = buffer + avpriv_mirror(-4 - 1, height - 1) * stride;
290  DWTELEM *b1 = buffer + avpriv_mirror(-4, height - 1) * stride;
291  DWTELEM *b2 = buffer + avpriv_mirror(-4 + 1, height - 1) * stride;
292  DWTELEM *b3 = buffer + avpriv_mirror(-4 + 2, height - 1) * stride;
293 
294  for (y = -4; y < height; y += 2) {
295  DWTELEM *b4 = buffer + avpriv_mirror(y + 3, height - 1) * stride;
296  DWTELEM *b5 = buffer + avpriv_mirror(y + 4, height - 1) * stride;
297 
298  if (y + 3 < (unsigned)height)
299  horizontal_decompose97i(b4, temp, width);
300  if (y + 4 < (unsigned)height)
301  horizontal_decompose97i(b5, temp, width);
302 
303  if (y + 3 < (unsigned)height)
304  vertical_decompose97iH0(b3, b4, b5, width);
305  if (y + 2 < (unsigned)height)
306  vertical_decompose97iL0(b2, b3, b4, width);
307  if (y + 1 < (unsigned)height)
308  vertical_decompose97iH1(b1, b2, b3, width);
309  if (y + 0 < (unsigned)height)
310  vertical_decompose97iL1(b0, b1, b2, width);
311 
312  b0 = b2;
313  b1 = b3;
314  b2 = b4;
315  b3 = b5;
316  }
317 }
318 
319  void ff_spatial_dwt(DWTELEM *buffer, DWTELEM *temp, int width, int height,
320  int stride, int type, int decomposition_count)
321 {
322  int level;
323 
324  for (level = 0; level < decomposition_count; level++) {
325  switch (type) {
326  case DWT_97:
327  spatial_decompose97i(buffer, temp,
328  width >> level, height >> level,
329  stride << level);
330  break;
331  case DWT_53:
332  spatial_decompose53i(buffer, temp,
333  width >> level, height >> level,
334  stride << level);
335  break;
336  }
337  }
338 }
339 
340  static void horizontal_compose53i(IDWTELEM *b, IDWTELEM *temp, int width)
341 {
342  const int width2 = width >> 1;
343  const int w2 = (width + 1) >> 1;
344  int x;
345 
346  for (x = 0; x < width2; x++) {
347  temp[2 * x] = b[x];
348  temp[2 * x + 1] = b[x + w2];
349  }
350  if (width & 1)
351  temp[2 * x] = b[x];
352 
353  b[0] = temp[0] - ((temp[1] + 1) >> 1);
354  for (x = 2; x < width - 1; x += 2) {
355  b[x] = temp[x] - ((temp[x - 1] + temp[x + 1] + 2) >> 2);
356  b[x - 1] = temp[x - 1] + ((b[x - 2] + b[x] + 1) >> 1);
357  }
358  if (width & 1) {
359  b[x] = temp[x] - ((temp[x - 1] + 1) >> 1);
360  b[x - 1] = temp[x - 1] + ((b[x - 2] + b[x] + 1) >> 1);
361  } else
362  b[x - 1] = temp[x - 1] + b[x - 2];
363 }
364 
365  static void vertical_compose53iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
366  int width)
367 {
368  int i;
369 
370  for (i = 0; i < width; i++)
371  b1[i] += (b0[i] + b2[i]) >> 1;
372 }
373 
374  static void vertical_compose53iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
375  int width)
376 {
377  int i;
378 
379  for (i = 0; i < width; i++)
380  b1[i] -= (b0[i] + b2[i] + 2) >> 2;
381 }
382 
383  static void spatial_compose53i_buffered_init(DWTCompose *cs, slice_buffer *sb,
384  int height, int stride_line)
385 {
386  cs->b0 = slice_buffer_get_line(sb,
387  avpriv_mirror(-1 - 1, height - 1) * stride_line);
388  cs->b1 = slice_buffer_get_line(sb, avpriv_mirror(-1, height - 1) * stride_line);
389  cs->y = -1;
390 }
391 
392  static void spatial_compose53i_init(DWTCompose *cs, IDWTELEM *buffer,
393  int height, int stride)
394 {
395  cs->b0 = buffer + avpriv_mirror(-1 - 1, height - 1) * stride;
396  cs->b1 = buffer + avpriv_mirror(-1, height - 1) * stride;
397  cs->y = -1;
398 }
399 
400  static void spatial_compose53i_dy_buffered(DWTCompose *cs, slice_buffer *sb,
401  IDWTELEM *temp,
402  int width, int height,
403  int stride_line)
404 {
405  int y = cs->y;
406 
407  IDWTELEM *b0 = cs->b0;
408  IDWTELEM *b1 = cs->b1;
409  IDWTELEM *b2 = slice_buffer_get_line(sb,
410  avpriv_mirror(y + 1, height - 1) *
411  stride_line);
412  IDWTELEM *b3 = slice_buffer_get_line(sb,
413  avpriv_mirror(y + 2, height - 1) *
414  stride_line);
415 
416  if (y + 1 < (unsigned)height && y < (unsigned)height) {
417  int x;
418 
419  for (x = 0; x < width; x++) {
420  b2[x] -= (b1[x] + b3[x] + 2) >> 2;
421  b1[x] += (b0[x] + b2[x]) >> 1;
422  }
423  } else {
424  if (y + 1 < (unsigned)height)
425  vertical_compose53iL0(b1, b2, b3, width);
426  if (y + 0 < (unsigned)height)
427  vertical_compose53iH0(b0, b1, b2, width);
428  }
429 
430  if (y - 1 < (unsigned)height)
431  horizontal_compose53i(b0, temp, width);
432  if (y + 0 < (unsigned)height)
433  horizontal_compose53i(b1, temp, width);
434 
435  cs->b0 = b2;
436  cs->b1 = b3;
437  cs->y += 2;
438 }
439 
440  static void spatial_compose53i_dy(DWTCompose *cs, IDWTELEM *buffer,
441  IDWTELEM *temp, int width, int height,
442  int stride)
443 {
444  int y = cs->y;
445  IDWTELEM *b0 = cs->b0;
446  IDWTELEM *b1 = cs->b1;
447  IDWTELEM *b2 = buffer + avpriv_mirror(y + 1, height - 1) * stride;
448  IDWTELEM *b3 = buffer + avpriv_mirror(y + 2, height - 1) * stride;
449 
450  if (y + 1 < (unsigned)height)
451  vertical_compose53iL0(b1, b2, b3, width);
452  if (y + 0 < (unsigned)height)
453  vertical_compose53iH0(b0, b1, b2, width);
454 
455  if (y - 1 < (unsigned)height)
456  horizontal_compose53i(b0, temp, width);
457  if (y + 0 < (unsigned)height)
458  horizontal_compose53i(b1, temp, width);
459 
460  cs->b0 = b2;
461  cs->b1 = b3;
462  cs->y += 2;
463 }
464 
465  static void snow_horizontal_compose97i(IDWTELEM *b, IDWTELEM *temp, int width)
466 {
467  const int w2 = (width + 1) >> 1;
468  int x;
469 
470  temp[0] = b[0] - ((3 * b[w2] + 2) >> 2);
471  for (x = 1; x < (width >> 1); x++) {
472  temp[2 * x] = b[x] - ((3 * (b[x + w2 - 1] + b[x + w2]) + 4) >> 3);
473  temp[2 * x - 1] = b[x + w2 - 1] - temp[2 * x - 2] - temp[2 * x];
474  }
475  if (width & 1) {
476  temp[2 * x] = b[x] - ((3 * b[x + w2 - 1] + 2) >> 2);
477  temp[2 * x - 1] = b[x + w2 - 1] - temp[2 * x - 2] - temp[2 * x];
478  } else
479  temp[2 * x - 1] = b[x + w2 - 1] - 2 * temp[2 * x - 2];
480 
481  b[0] = temp[0] + ((2 * temp[0] + temp[1] + 4) >> 3);
482  for (x = 2; x < width - 1; x += 2) {
483  b[x] = temp[x] + ((4 * temp[x] + temp[x - 1] + temp[x + 1] + 8) >> 4);
484  b[x - 1] = temp[x - 1] + ((3 * (b[x - 2] + b[x])) >> 1);
485  }
486  if (width & 1) {
487  b[x] = temp[x] + ((2 * temp[x] + temp[x - 1] + 4) >> 3);
488  b[x - 1] = temp[x - 1] + ((3 * (b[x - 2] + b[x])) >> 1);
489  } else
490  b[x - 1] = temp[x - 1] + 3 * b[x - 2];
491 }
492 
493  static void vertical_compose97iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
494  int width)
495 {
496  int i;
497 
498  for (i = 0; i < width; i++)
499  b1[i] += (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS;
500 }
501 
502  static void vertical_compose97iH1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
503  int width)
504 {
505  int i;
506 
507  for (i = 0; i < width; i++)
508  b1[i] -= (W_CM * (b0[i] + b2[i]) + W_CO) >> W_CS;
509 }
510 
511  static void vertical_compose97iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
512  int width)
513 {
514  int i;
515 
516  for (i = 0; i < width; i++)
517  b1[i] += (W_BM * (b0[i] + b2[i]) + 4 * b1[i] + W_BO) >> W_BS;
518 }
519 
520  static void vertical_compose97iL1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
521  int width)
522 {
523  int i;
524 
525  for (i = 0; i < width; i++)
526  b1[i] -= (W_DM * (b0[i] + b2[i]) + W_DO) >> W_DS;
527 }
528 
529  static void snow_vertical_compose97i(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
530  IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
531  int width)
532 {
533  int i;
534 
535  for (i = 0; i < width; i++) {
536  b4[i] -= (W_DM * (b3[i] + b5[i]) + W_DO) >> W_DS;
537  b3[i] -= (W_CM * (b2[i] + b4[i]) + W_CO) >> W_CS;
538  b2[i] += (W_BM * (b1[i] + b3[i]) + 4 * b2[i] + W_BO) >> W_BS;
539  b1[i] += (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS;
540  }
541 }
542 
543  static void spatial_compose97i_buffered_init(DWTCompose *cs, slice_buffer *sb,
544  int height, int stride_line)
545 {
546  cs->b0 = slice_buffer_get_line(sb, avpriv_mirror(-3 - 1, height - 1) * stride_line);
547  cs->b1 = slice_buffer_get_line(sb, avpriv_mirror(-3, height - 1) * stride_line);
548  cs->b2 = slice_buffer_get_line(sb, avpriv_mirror(-3 + 1, height - 1) * stride_line);
549  cs->b3 = slice_buffer_get_line(sb, avpriv_mirror(-3 + 2, height - 1) * stride_line);
550  cs->y = -3;
551 }
552 
553  static void spatial_compose97i_init(DWTCompose *cs, IDWTELEM *buffer, int height,
554  int stride)
555 {
556  cs->b0 = buffer + avpriv_mirror(-3 - 1, height - 1) * stride;
557  cs->b1 = buffer + avpriv_mirror(-3, height - 1) * stride;
558  cs->b2 = buffer + avpriv_mirror(-3 + 1, height - 1) * stride;
559  cs->b3 = buffer + avpriv_mirror(-3 + 2, height - 1) * stride;
560  cs->y = -3;
561 }
562 
563  static void spatial_compose97i_dy_buffered(SnowDWTContext *dsp, DWTCompose *cs,
564  slice_buffer * sb, IDWTELEM *temp,
565  int width, int height,
566  int stride_line)
567 {
568  int y = cs->y;
569 
570  IDWTELEM *b0 = cs->b0;
571  IDWTELEM *b1 = cs->b1;
572  IDWTELEM *b2 = cs->b2;
573  IDWTELEM *b3 = cs->b3;
574  IDWTELEM *b4 = slice_buffer_get_line(sb,
575  avpriv_mirror(y + 3, height - 1) *
576  stride_line);
577  IDWTELEM *b5 = slice_buffer_get_line(sb,
578  avpriv_mirror(y + 4, height - 1) *
579  stride_line);
580 
581  if (y > 0 && y + 4 < height) {
582  dsp->vertical_compose97i(b0, b1, b2, b3, b4, b5, width);
583  } else {
584  if (y + 3 < (unsigned)height)
585  vertical_compose97iL1(b3, b4, b5, width);
586  if (y + 2 < (unsigned)height)
587  vertical_compose97iH1(b2, b3, b4, width);
588  if (y + 1 < (unsigned)height)
589  vertical_compose97iL0(b1, b2, b3, width);
590  if (y + 0 < (unsigned)height)
591  vertical_compose97iH0(b0, b1, b2, width);
592  }
593 
594  if (y - 1 < (unsigned)height)
595  dsp->horizontal_compose97i(b0, temp, width);
596  if (y + 0 < (unsigned)height)
597  dsp->horizontal_compose97i(b1, temp, width);
598 
599  cs->b0 = b2;
600  cs->b1 = b3;
601  cs->b2 = b4;
602  cs->b3 = b5;
603  cs->y += 2;
604 }
605 
606  static void spatial_compose97i_dy(DWTCompose *cs, IDWTELEM *buffer,
607  IDWTELEM *temp, int width, int height,
608  int stride)
609 {
610  int y = cs->y;
611  IDWTELEM *b0 = cs->b0;
612  IDWTELEM *b1 = cs->b1;
613  IDWTELEM *b2 = cs->b2;
614  IDWTELEM *b3 = cs->b3;
615  IDWTELEM *b4 = buffer + avpriv_mirror(y + 3, height - 1) * stride;
616  IDWTELEM *b5 = buffer + avpriv_mirror(y + 4, height - 1) * stride;
617 
618  if (y + 3 < (unsigned)height)
619  vertical_compose97iL1(b3, b4, b5, width);
620  if (y + 2 < (unsigned)height)
621  vertical_compose97iH1(b2, b3, b4, width);
622  if (y + 1 < (unsigned)height)
623  vertical_compose97iL0(b1, b2, b3, width);
624  if (y + 0 < (unsigned)height)
625  vertical_compose97iH0(b0, b1, b2, width);
626 
627  if (y - 1 < (unsigned)height)
628  snow_horizontal_compose97i(b0, temp, width);
629  if (y + 0 < (unsigned)height)
630  snow_horizontal_compose97i(b1, temp, width);
631 
632  cs->b0 = b2;
633  cs->b1 = b3;
634  cs->b2 = b4;
635  cs->b3 = b5;
636  cs->y += 2;
637 }
638 
639  void ff_spatial_idwt_buffered_init(DWTCompose *cs, slice_buffer *sb, int width,
640  int height, int stride_line, int type,
641  int decomposition_count)
642 {
643  int level;
644  for (level = decomposition_count - 1; level >= 0; level--) {
645  switch (type) {
646  case DWT_97:
647  spatial_compose97i_buffered_init(cs + level, sb, height >> level,
648  stride_line << level);
649  break;
650  case DWT_53:
651  spatial_compose53i_buffered_init(cs + level, sb, height >> level,
652  stride_line << level);
653  break;
654  }
655  }
656 }
657 
658  void ff_spatial_idwt_buffered_slice(SnowDWTContext *dsp, DWTCompose *cs,
659  slice_buffer *slice_buf, IDWTELEM *temp,
660  int width, int height, int stride_line,
661  int type, int decomposition_count, int y)
662 {
663  const int support = type == 1 ? 3 : 5;
664  int level;
665  if (type == 2)
666  return;
667 
668  for (level = decomposition_count - 1; level >= 0; level--)
669  while (cs[level].y <= FFMIN((y >> level) + support, height >> level)) {
670  switch (type) {
671  case DWT_97:
672  spatial_compose97i_dy_buffered(dsp, cs + level, slice_buf, temp,
673  width >> level,
674  height >> level,
675  stride_line << level);
676  break;
677  case DWT_53:
678  spatial_compose53i_dy_buffered(cs + level, slice_buf, temp,
679  width >> level,
680  height >> level,
681  stride_line << level);
682  break;
683  }
684  }
685 }
686 
687  static void spatial_idwt_init(DWTCompose *cs, IDWTELEM *buffer, int width,
688  int height, int stride, int type,
689  int decomposition_count)
690 {
691  int level;
692  for (level = decomposition_count - 1; level >= 0; level--) {
693  switch (type) {
694  case DWT_97:
695  spatial_compose97i_init(cs + level, buffer, height >> level,
696  stride << level);
697  break;
698  case DWT_53:
699  spatial_compose53i_init(cs + level, buffer, height >> level,
700  stride << level);
701  break;
702  }
703  }
704 }
705 
706  static void spatial_idwt_slice(DWTCompose *cs, IDWTELEM *buffer,
707  IDWTELEM *temp, int width, int height,
708  int stride, int type,
709  int decomposition_count, int y)
710 {
711  const int support = type == 1 ? 3 : 5;
712  int level;
713  if (type == 2)
714  return;
715 
716  for (level = decomposition_count - 1; level >= 0; level--)
717  while (cs[level].y <= FFMIN((y >> level) + support, height >> level)) {
718  switch (type) {
719  case DWT_97:
720  spatial_compose97i_dy(cs + level, buffer, temp, width >> level,
721  height >> level, stride << level);
722  break;
723  case DWT_53:
724  spatial_compose53i_dy(cs + level, buffer, temp, width >> level,
725  height >> level, stride << level);
726  break;
727  }
728  }
729 }
730 
731  void ff_spatial_idwt(IDWTELEM *buffer, IDWTELEM *temp, int width, int height,
732  int stride, int type, int decomposition_count)
733 {
734  DWTCompose cs[MAX_DECOMPOSITIONS];
735  int y;
736  spatial_idwt_init(cs, buffer, width, height, stride, type,
737  decomposition_count);
738  for (y = 0; y < height; y += 4)
739  spatial_idwt_slice(cs, buffer, temp, width, height, stride, type,
740  decomposition_count, y);
741 }
742 
743  static inline int w_c(struct MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t line_size,
744  int w, int h, int type)
745 {
746  int s, i, j;
747  const int dec_count = w == 8 ? 3 : 4;
748  int tmp[32 * 32], tmp2[32];
749  int level, ori;
750  static const int scale[2][2][4][4] = {
751  {
752  { // 9/7 8x8 dec=3
753  { 268, 239, 239, 213 },
754  { 0, 224, 224, 152 },
755  { 0, 135, 135, 110 },
756  },
757  { // 9/7 16x16 or 32x32 dec=4
758  { 344, 310, 310, 280 },
759  { 0, 320, 320, 228 },
760  { 0, 175, 175, 136 },
761  { 0, 129, 129, 102 },
762  }
763  },
764  {
765  { // 5/3 8x8 dec=3
766  { 275, 245, 245, 218 },
767  { 0, 230, 230, 156 },
768  { 0, 138, 138, 113 },
769  },
770  { // 5/3 16x16 or 32x32 dec=4
771  { 352, 317, 317, 286 },
772  { 0, 328, 328, 233 },
773  { 0, 180, 180, 140 },
774  { 0, 132, 132, 105 },
775  }
776  }
777  };
778 
779  for (i = 0; i < h; i++) {
780  for (j = 0; j < w; j += 4) {
781  tmp[32 * i + j + 0] = (pix1[j + 0] - pix2[j + 0]) * (1 << 4);
782  tmp[32 * i + j + 1] = (pix1[j + 1] - pix2[j + 1]) * (1 << 4);
783  tmp[32 * i + j + 2] = (pix1[j + 2] - pix2[j + 2]) * (1 << 4);
784  tmp[32 * i + j + 3] = (pix1[j + 3] - pix2[j + 3]) * (1 << 4);
785  }
786  pix1 += line_size;
787  pix2 += line_size;
788  }
789 
790  ff_spatial_dwt(tmp, tmp2, w, h, 32, type, dec_count);
791 
792  s = 0;
793  av_assert1(w == h);
794  for (level = 0; level < dec_count; level++)
795  for (ori = level ? 1 : 0; ori < 4; ori++) {
796  int size = w >> (dec_count - level);
797  int sx = (ori & 1) ? size : 0;
798  int stride = 32 << (dec_count - level);
799  int sy = (ori & 2) ? stride >> 1 : 0;
800 
801  for (i = 0; i < size; i++)
802  for (j = 0; j < size; j++) {
803  int v = tmp[sx + sy + i * stride + j] *
804  scale[type][dec_count - 3][level][ori];
805  s += FFABS(v);
806  }
807  }
808  av_assert1(s >= 0);
809  return s >> 9;
810 }
811 
812  static int w53_8_c(struct MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t line_size, int h)
813 {
814  return w_c(v, pix1, pix2, line_size, 8, h, 1);
815 }
816 
817  static int w97_8_c(struct MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t line_size, int h)
818 {
819  return w_c(v, pix1, pix2, line_size, 8, h, 0);
820 }
821 
822  static int w53_16_c(struct MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t line_size, int h)
823 {
824  return w_c(v, pix1, pix2, line_size, 16, h, 1);
825 }
826 
827  static int w97_16_c(struct MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t line_size, int h)
828 {
829  return w_c(v, pix1, pix2, line_size, 16, h, 0);
830 }
831 
832  int ff_w53_32_c(struct MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t line_size, int h)
833 {
834  return w_c(v, pix1, pix2, line_size, 32, h, 1);
835 }
836 
837  int ff_w97_32_c(struct MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t line_size, int h)
838 {
839  return w_c(v, pix1, pix2, line_size, 32, h, 0);
840 }
841 
842  av_cold void ff_dsputil_init_dwt(MECmpContext *c)
843 {
844  c->w53[0] = w53_16_c;
845  c->w53[1] = w53_8_c;
846  c->w97[0] = w97_16_c;
847  c->w97[1] = w97_8_c;
848 }
849 
850  av_cold void ff_dwt_init(SnowDWTContext *c)
851 {
852  c->vertical_compose97i = snow_vertical_compose97i;
853  c->horizontal_compose97i = snow_horizontal_compose97i;
854  c->inner_add_yblock = ff_snow_inner_add_yblock;
855 
856 #if ARCH_X86 && HAVE_MMX
857  ff_dwt_init_x86(c);
858 #endif
859 }
860 
861 
ff_dwt_init_x86
void ff_dwt_init_x86(SnowDWTContext *c)
Definition: snowdsp.c:881
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static void spatial_compose97i_dy(DWTCompose *cs, IDWTELEM *buffer, IDWTELEM *temp, int width, int height, int stride)
Definition: snow_dwt.c:606
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Definition: svq3.c:204
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static void spatial_compose53i_dy(DWTCompose *cs, IDWTELEM *buffer, IDWTELEM *temp, int width, int height, int stride)
Definition: snow_dwt.c:440
MAX_DECOMPOSITIONS
#define MAX_DECOMPOSITIONS
Definition: dirac_dwt.h:30
AVERROR
Filter the word "frame" indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
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Definition: snow_dwt.h:75
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Definition: snow_dwt.h:80
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static int w97_16_c(struct MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t line_size, int h)
Definition: snow_dwt.c:827
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#define W_DS
Definition: snow_dwt.h:89
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static void snow_horizontal_compose97i(IDWTELEM *b, IDWTELEM *temp, int width)
Definition: snow_dwt.c:465
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Definition: snow_dwt.c:400
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Definition: snow_dwt.c:91
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#define W_AM
Definition: snow_dwt.h:74
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Definition: snow_dwt.c:276
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Definition: snow_dwt.h:70
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Definition: llviddspenc.c:38
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Definition: snow_dwt.h:71
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Definition: snow_dwt.c:520
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void(* vertical_compose97i)(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5, int width)
Definition: snow_dwt.h:59
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Definition: snow_dwt.h:58
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Definition: snow_dwt.h:85
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Definition: snow_dwt.c:365
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Definition: snow_dwt.c:850
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#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
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void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride, uint8_t **block, int b_w, int b_h, int src_x, int src_y, int src_stride, slice_buffer *sb, int add, uint8_t *dst8)
Definition: snow.c:29
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Definition: me_cmp.h:55
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Definition: snow_dwt.c:145
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Definition: snow_dwt.h:76
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Definition: snow_dwt.c:285
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static void spatial_compose53i_buffered_init(DWTCompose *cs, slice_buffer *sb, int height, int stride_line)
Definition: snow_dwt.c:383
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static av_always_inline av_const int avpriv_mirror(int x, int w)
Definition: internal.h:168
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
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av_cold void ff_dsputil_init_dwt(MECmpContext *c)
Definition: snow_dwt.c:842
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Definition: snow_dwt.c:687
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#define W_DM
Definition: snow_dwt.h:87
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Definition: snow_dwt.h:40
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static void vertical_compose97iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
Definition: snow_dwt.c:511
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static void scale(int *out, const int *in, const int w, const int h, const int shift)
Definition: vvc_intra.c:291
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Definition: snow_dwt.c:194
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static int shift(int a, int b)
Definition: bonk.c:262
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int size
Definition: twinvq_data.h:10344
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void ff_slice_buffer_release(slice_buffer *buf, int line)
Definition: snow_dwt.c:78
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#define LIFTS(src, ref, inv)
height
#define height
b2
static double b2(void *priv, double x, double y)
Definition: vf_xfade.c:2036
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Definition: graph2dot.c:48
attributes.h
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void(* horizontal_compose97i)(IDWTELEM *b, IDWTELEM *temp, int width)
Definition: snow_dwt.h:62
DWTELEM
int DWTELEM
Definition: dirac_dwt.h:26
w53_16_c
static int w53_16_c(struct MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t line_size, int h)
Definition: snow_dwt.c:822
vertical_decompose97iH0
static void vertical_decompose97iH0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, int width)
Definition: snow_dwt.c:248
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
lift
static av_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)
Definition: snow_dwt.c:115
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:31
horizontal_compose53i
static void horizontal_compose53i(IDWTELEM *b, IDWTELEM *temp, int width)
Definition: snow_dwt.c:340
common.h
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:56
av_always_inline
#define av_always_inline
Definition: attributes.h:49
spatial_idwt_slice
static void spatial_idwt_slice(DWTCompose *cs, IDWTELEM *buffer, IDWTELEM *temp, int width, int height, int stride, int type, int decomposition_count, int y)
Definition: snow_dwt.c:706
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:262
stride
#define stride
Definition: h264pred_template.c:537
W_BS
#define W_BS
Definition: snow_dwt.h:81
spatial_decompose53i
static void spatial_decompose53i(DWTELEM *buffer, DWTELEM *temp, int width, int height, int stride)
Definition: snow_dwt.c:212
me_cmp.h
vertical_decompose53iL0
static void vertical_decompose53iL0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, int width)
Definition: snow_dwt.c:203
buffer
the frame and frame reference mechanism is intended to as much as expensive copies of that data while still allowing the filters to produce correct results The data is stored in buffers represented by AVFrame structures Several references can point to the same frame buffer
Definition: filter_design.txt:49
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:112
temp
else temp
Definition: vf_mcdeint.c:263
W_CM
#define W_CM
Definition: snow_dwt.h:83
slice_buffer_get_line
#define slice_buffer_get_line(slice_buf, line_num)
Definition: snow_dwt.h:91
spatial_compose97i_init
static void spatial_compose97i_init(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
Definition: snow_dwt.c:553
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
W_CO
#define W_CO
Definition: snow_dwt.h:84
ff_w97_32_c
int ff_w97_32_c(struct MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t line_size, int h)
Definition: snow_dwt.c:837
IDWTELEM
short IDWTELEM
Definition: dirac_dwt.h:27
b0
static double b0(void *priv, double x, double y)
Definition: vf_xfade.c:2034
vertical_decompose97iL0
static void vertical_decompose97iL0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, int width)
Definition: snow_dwt.c:266
h
h
Definition: vp9dsp_template.c:2038
ff_spatial_idwt_buffered_slice
void ff_spatial_idwt_buffered_slice(SnowDWTContext *dsp, DWTCompose *cs, slice_buffer *slice_buf, IDWTELEM *temp, int width, int height, int stride_line, int type, int decomposition_count, int y)
Definition: snow_dwt.c:658
MpegEncContext
MpegEncContext.
Definition: mpegvideo.h:67
w_c
static int w_c(struct MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t line_size, int w, int h, int type)
Definition: snow_dwt.c:743
spatial_compose53i_init
static void spatial_compose53i_init(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
Definition: snow_dwt.c:392
horizontal_decompose53i
static void horizontal_decompose53i(DWTELEM *b, DWTELEM *temp, int width)
Definition: snow_dwt.c:178
line
The official guide to swscale for confused that consecutive non overlapping rectangles of slice_bottom special converter These generally are unscaled converters of common like for each output line the vertical scaler pulls lines from a ring buffer When the ring buffer does not contain the wanted line
Definition: swscale.txt:40
DWTCompose::b2
IDWTELEM * b2
Definition: snow_dwt.h:39
vertical_compose97iH0
static void vertical_compose97iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
Definition: snow_dwt.c:493
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