FFmpeg  4.4
imgutils.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 /**
20  * @file
21  * misc image utilities
22  */
23 
24 #include "avassert.h"
25 #include "common.h"
26 #include "imgutils.h"
27 #include "imgutils_internal.h"
28 #include "internal.h"
29 #include "intreadwrite.h"
30 #include "log.h"
31 #include "mathematics.h"
32 #include "pixdesc.h"
33 #include "rational.h"
34 
35 void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
36  const AVPixFmtDescriptor *pixdesc)
37 {
38  int i;
39  memset(max_pixsteps, 0, 4*sizeof(max_pixsteps[0]));
40  if (max_pixstep_comps)
41  memset(max_pixstep_comps, 0, 4*sizeof(max_pixstep_comps[0]));
42 
43  for (i = 0; i < 4; i++) {
44  const AVComponentDescriptor *comp = &(pixdesc->comp[i]);
45  if (comp->step > max_pixsteps[comp->plane]) {
46  max_pixsteps[comp->plane] = comp->step;
47  if (max_pixstep_comps)
48  max_pixstep_comps[comp->plane] = i;
49  }
50  }
51 }
52 
53 static inline
54 int image_get_linesize(int width, int plane,
55  int max_step, int max_step_comp,
56  const AVPixFmtDescriptor *desc)
57 {
58  int s, shifted_w, linesize;
59 
60  if (!desc)
61  return AVERROR(EINVAL);
62 
63  if (width < 0)
64  return AVERROR(EINVAL);
65  s = (max_step_comp == 1 || max_step_comp == 2) ? desc->log2_chroma_w : 0;
66  shifted_w = ((width + (1 << s) - 1)) >> s;
67  if (shifted_w && max_step > INT_MAX / shifted_w)
68  return AVERROR(EINVAL);
69  linesize = max_step * shifted_w;
70 
71  if (desc->flags & AV_PIX_FMT_FLAG_BITSTREAM)
72  linesize = (linesize + 7) >> 3;
73  return linesize;
74 }
75 
77 {
79  int max_step [4]; /* max pixel step for each plane */
80  int max_step_comp[4]; /* the component for each plane which has the max pixel step */
81 
82  if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
83  return AVERROR(EINVAL);
84 
85  av_image_fill_max_pixsteps(max_step, max_step_comp, desc);
86  return image_get_linesize(width, plane, max_step[plane], max_step_comp[plane], desc);
87 }
88 
89 int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
90 {
91  int i, ret;
93  int max_step [4]; /* max pixel step for each plane */
94  int max_step_comp[4]; /* the component for each plane which has the max pixel step */
95 
96  memset(linesizes, 0, 4*sizeof(linesizes[0]));
97 
98  if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
99  return AVERROR(EINVAL);
100 
101  av_image_fill_max_pixsteps(max_step, max_step_comp, desc);
102  for (i = 0; i < 4; i++) {
103  if ((ret = image_get_linesize(width, i, max_step[i], max_step_comp[i], desc)) < 0)
104  return ret;
105  linesizes[i] = ret;
106  }
107 
108  return 0;
109 }
110 
112  int height, const ptrdiff_t linesizes[4])
113 {
114  int i, has_plane[4] = { 0 };
115 
117  memset(sizes , 0, sizeof(sizes[0])*4);
118 
119  if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
120  return AVERROR(EINVAL);
121 
122  if (linesizes[0] > SIZE_MAX / height)
123  return AVERROR(EINVAL);
124  sizes[0] = linesizes[0] * (size_t)height;
125 
126  if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
127  desc->flags & FF_PSEUDOPAL) {
128  sizes[1] = 256 * 4; /* palette is stored here as 256 32 bits words */
129  return 0;
130  }
131 
132  for (i = 0; i < 4; i++)
133  has_plane[desc->comp[i].plane] = 1;
134 
135  for (i = 1; i < 4 && has_plane[i]; i++) {
136  int h, s = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
137  h = (height + (1 << s) - 1) >> s;
138  if (linesizes[i] > SIZE_MAX / h)
139  return AVERROR(EINVAL);
140  sizes[i] = (size_t)h * linesizes[i];
141  }
142 
143  return 0;
144 }
145 
147  uint8_t *ptr, const int linesizes[4])
148 {
149  int i, ret;
150  ptrdiff_t linesizes1[4];
151  size_t sizes[4];
152 
153  memset(data , 0, sizeof(data[0])*4);
154 
155  for (i = 0; i < 4; i++)
156  linesizes1[i] = linesizes[i];
157 
158  ret = av_image_fill_plane_sizes(sizes, pix_fmt, height, linesizes1);
159  if (ret < 0)
160  return ret;
161 
162  ret = 0;
163  for (i = 0; i < 4; i++) {
164  if (sizes[i] > INT_MAX - ret)
165  return AVERROR(EINVAL);
166  ret += sizes[i];
167  }
168 
169  data[0] = ptr;
170  for (i = 1; i < 4 && sizes[i]; i++)
171  data[i] = data[i - 1] + sizes[i - 1];
172 
173  return ret;
174 }
175 
177 {
178  int i;
179 
180  for (i = 0; i < 256; i++) {
181  int r, g, b;
182 
183  switch (pix_fmt) {
184  case AV_PIX_FMT_RGB8:
185  r = (i>>5 )*36;
186  g = ((i>>2)&7)*36;
187  b = (i&3 )*85;
188  break;
189  case AV_PIX_FMT_BGR8:
190  b = (i>>6 )*85;
191  g = ((i>>3)&7)*36;
192  r = (i&7 )*36;
193  break;
195  r = (i>>3 )*255;
196  g = ((i>>1)&3)*85;
197  b = (i&1 )*255;
198  break;
200  b = (i>>3 )*255;
201  g = ((i>>1)&3)*85;
202  r = (i&1 )*255;
203  break;
204  case AV_PIX_FMT_GRAY8:
205  r = b = g = i;
206  break;
207  default:
208  return AVERROR(EINVAL);
209  }
210  pal[i] = b + (g << 8) + (r << 16) + (0xFFU << 24);
211  }
212 
213  return 0;
214 }
215 
216 int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
217  int w, int h, enum AVPixelFormat pix_fmt, int align)
218 {
220  int i, ret;
221  ptrdiff_t linesizes1[4];
222  size_t total_size, sizes[4];
223  uint8_t *buf;
224 
225  if (!desc)
226  return AVERROR(EINVAL);
227 
228  if ((ret = av_image_check_size(w, h, 0, NULL)) < 0)
229  return ret;
230  if ((ret = av_image_fill_linesizes(linesizes, pix_fmt, align>7 ? FFALIGN(w, 8) : w)) < 0)
231  return ret;
232 
233  for (i = 0; i < 4; i++) {
234  linesizes[i] = FFALIGN(linesizes[i], align);
235  linesizes1[i] = linesizes[i];
236  }
237 
238  if ((ret = av_image_fill_plane_sizes(sizes, pix_fmt, h, linesizes1)) < 0)
239  return ret;
240  total_size = align;
241  for (i = 0; i < 4; i++) {
242  if (total_size > SIZE_MAX - sizes[i])
243  return AVERROR(EINVAL);
244  total_size += sizes[i];
245  }
246  buf = av_malloc(total_size);
247  if (!buf)
248  return AVERROR(ENOMEM);
249  if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, buf, linesizes)) < 0) {
250  av_free(buf);
251  return ret;
252  }
253  if (desc->flags & AV_PIX_FMT_FLAG_PAL || (desc->flags & FF_PSEUDOPAL && pointers[1])) {
254  avpriv_set_systematic_pal2((uint32_t*)pointers[1], pix_fmt);
255  if (align < 4) {
256  av_log(NULL, AV_LOG_ERROR, "Formats with a palette require a minimum alignment of 4\n");
257  av_free(buf);
258  return AVERROR(EINVAL);
259  }
260  }
261 
262  if ((desc->flags & AV_PIX_FMT_FLAG_PAL ||
263  desc->flags & FF_PSEUDOPAL) && pointers[1] &&
264  pointers[1] - pointers[0] > linesizes[0] * h) {
265  /* zero-initialize the padding before the palette */
266  memset(pointers[0] + linesizes[0] * h, 0,
267  pointers[1] - pointers[0] - linesizes[0] * h);
268  }
269 
270  return ret;
271 }
272 
273 typedef struct ImgUtils {
274  const AVClass *class;
276  void *log_ctx;
277 } ImgUtils;
278 
279 static const AVClass imgutils_class = {
280  .class_name = "IMGUTILS",
281  .item_name = av_default_item_name,
282  .option = NULL,
283  .version = LIBAVUTIL_VERSION_INT,
284  .log_level_offset_offset = offsetof(ImgUtils, log_offset),
285  .parent_log_context_offset = offsetof(ImgUtils, log_ctx),
286 };
287 
288 int av_image_check_size2(unsigned int w, unsigned int h, int64_t max_pixels, enum AVPixelFormat pix_fmt, int log_offset, void *log_ctx)
289 {
290  ImgUtils imgutils = {
291  .class = &imgutils_class,
292  .log_offset = log_offset,
293  .log_ctx = log_ctx,
294  };
295  int64_t stride = av_image_get_linesize(pix_fmt, w, 0);
296  if (stride <= 0)
297  stride = 8LL*w;
298  stride += 128*8;
299 
300  if ((int)w<=0 || (int)h<=0 || stride >= INT_MAX || stride*(uint64_t)(h+128) >= INT_MAX) {
301  av_log(&imgutils, AV_LOG_ERROR, "Picture size %ux%u is invalid\n", w, h);
302  return AVERROR(EINVAL);
303  }
304 
305  if (max_pixels < INT64_MAX) {
306  if (w*(int64_t)h > max_pixels) {
307  av_log(&imgutils, AV_LOG_ERROR,
308  "Picture size %ux%u exceeds specified max pixel count %"PRId64", see the documentation if you wish to increase it\n",
309  w, h, max_pixels);
310  return AVERROR(EINVAL);
311  }
312  }
313 
314  return 0;
315 }
316 
317 int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
318 {
319  return av_image_check_size2(w, h, INT64_MAX, AV_PIX_FMT_NONE, log_offset, log_ctx);
320 }
321 
322 int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar)
323 {
324  int64_t scaled_dim;
325 
326  if (sar.den <= 0 || sar.num < 0)
327  return AVERROR(EINVAL);
328 
329  if (!sar.num || sar.num == sar.den)
330  return 0;
331 
332  if (sar.num < sar.den)
333  scaled_dim = av_rescale_rnd(w, sar.num, sar.den, AV_ROUND_ZERO);
334  else
335  scaled_dim = av_rescale_rnd(h, sar.den, sar.num, AV_ROUND_ZERO);
336 
337  if (scaled_dim > 0)
338  return 0;
339 
340  return AVERROR(EINVAL);
341 }
342 
343 static void image_copy_plane(uint8_t *dst, ptrdiff_t dst_linesize,
344  const uint8_t *src, ptrdiff_t src_linesize,
345  ptrdiff_t bytewidth, int height)
346 {
347  if (!dst || !src)
348  return;
349  av_assert0(FFABS(src_linesize) >= bytewidth);
350  av_assert0(FFABS(dst_linesize) >= bytewidth);
351  for (;height > 0; height--) {
352  memcpy(dst, src, bytewidth);
353  dst += dst_linesize;
354  src += src_linesize;
355  }
356 }
357 
358 static void image_copy_plane_uc_from(uint8_t *dst, ptrdiff_t dst_linesize,
359  const uint8_t *src, ptrdiff_t src_linesize,
360  ptrdiff_t bytewidth, int height)
361 {
362  int ret = -1;
363 
364 #if ARCH_X86
365  ret = ff_image_copy_plane_uc_from_x86(dst, dst_linesize, src, src_linesize,
366  bytewidth, height);
367 #endif
368 
369  if (ret < 0)
370  image_copy_plane(dst, dst_linesize, src, src_linesize, bytewidth, height);
371 }
372 
373 void av_image_copy_plane(uint8_t *dst, int dst_linesize,
374  const uint8_t *src, int src_linesize,
375  int bytewidth, int height)
376 {
377  image_copy_plane(dst, dst_linesize, src, src_linesize, bytewidth, height);
378 }
379 
380 static void image_copy(uint8_t *dst_data[4], const ptrdiff_t dst_linesizes[4],
381  const uint8_t *src_data[4], const ptrdiff_t src_linesizes[4],
382  enum AVPixelFormat pix_fmt, int width, int height,
383  void (*copy_plane)(uint8_t *, ptrdiff_t, const uint8_t *,
384  ptrdiff_t, ptrdiff_t, int))
385 {
387 
388  if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
389  return;
390 
391  if (desc->flags & AV_PIX_FMT_FLAG_PAL ||
392  desc->flags & FF_PSEUDOPAL) {
393  copy_plane(dst_data[0], dst_linesizes[0],
394  src_data[0], src_linesizes[0],
395  width, height);
396  /* copy the palette */
397  if ((desc->flags & AV_PIX_FMT_FLAG_PAL) || (dst_data[1] && src_data[1]))
398  memcpy(dst_data[1], src_data[1], 4*256);
399  } else {
400  int i, planes_nb = 0;
401 
402  for (i = 0; i < desc->nb_components; i++)
403  planes_nb = FFMAX(planes_nb, desc->comp[i].plane + 1);
404 
405  for (i = 0; i < planes_nb; i++) {
406  int h = height;
407  ptrdiff_t bwidth = av_image_get_linesize(pix_fmt, width, i);
408  if (bwidth < 0) {
409  av_log(NULL, AV_LOG_ERROR, "av_image_get_linesize failed\n");
410  return;
411  }
412  if (i == 1 || i == 2) {
413  h = AV_CEIL_RSHIFT(height, desc->log2_chroma_h);
414  }
415  copy_plane(dst_data[i], dst_linesizes[i],
416  src_data[i], src_linesizes[i],
417  bwidth, h);
418  }
419  }
420 }
421 
422 void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
423  const uint8_t *src_data[4], const int src_linesizes[4],
424  enum AVPixelFormat pix_fmt, int width, int height)
425 {
426  ptrdiff_t dst_linesizes1[4], src_linesizes1[4];
427  int i;
428 
429  for (i = 0; i < 4; i++) {
430  dst_linesizes1[i] = dst_linesizes[i];
431  src_linesizes1[i] = src_linesizes[i];
432  }
433 
434  image_copy(dst_data, dst_linesizes1, src_data, src_linesizes1, pix_fmt,
436 }
437 
438 void av_image_copy_uc_from(uint8_t *dst_data[4], const ptrdiff_t dst_linesizes[4],
439  const uint8_t *src_data[4], const ptrdiff_t src_linesizes[4],
440  enum AVPixelFormat pix_fmt, int width, int height)
441 {
442  image_copy(dst_data, dst_linesizes, src_data, src_linesizes, pix_fmt,
444 }
445 
446 int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4],
447  const uint8_t *src, enum AVPixelFormat pix_fmt,
448  int width, int height, int align)
449 {
450  int ret, i;
451 
452  ret = av_image_check_size(width, height, 0, NULL);
453  if (ret < 0)
454  return ret;
455 
456  ret = av_image_fill_linesizes(dst_linesize, pix_fmt, width);
457  if (ret < 0)
458  return ret;
459 
460  for (i = 0; i < 4; i++)
461  dst_linesize[i] = FFALIGN(dst_linesize[i], align);
462 
463  return av_image_fill_pointers(dst_data, pix_fmt, height, (uint8_t *)src, dst_linesize);
464 }
465 
467  int width, int height, int align)
468 {
469  int ret, i;
470  int linesize[4];
471  ptrdiff_t aligned_linesize[4];
472  size_t sizes[4];
474  if (!desc)
475  return AVERROR(EINVAL);
476 
477  ret = av_image_check_size(width, height, 0, NULL);
478  if (ret < 0)
479  return ret;
480 
481  // do not include palette for these pseudo-paletted formats
482  if (desc->flags & FF_PSEUDOPAL)
483  return FFALIGN(width, align) * height;
484 
485  ret = av_image_fill_linesizes(linesize, pix_fmt, width);
486  if (ret < 0)
487  return ret;
488 
489  for (i = 0; i < 4; i++)
490  aligned_linesize[i] = FFALIGN(linesize[i], align);
491 
492  ret = av_image_fill_plane_sizes(sizes, pix_fmt, height, aligned_linesize);
493  if (ret < 0)
494  return ret;
495 
496  ret = 0;
497  for (i = 0; i < 4; i++) {
498  if (sizes[i] > INT_MAX - ret)
499  return AVERROR(EINVAL);
500  ret += sizes[i];
501  }
502  return ret;
503 }
504 
505 int av_image_copy_to_buffer(uint8_t *dst, int dst_size,
506  const uint8_t * const src_data[4],
507  const int src_linesize[4],
508  enum AVPixelFormat pix_fmt,
509  int width, int height, int align)
510 {
511  int i, j, nb_planes = 0, linesize[4];
514  int ret;
515 
516  if (size > dst_size || size < 0 || !desc)
517  return AVERROR(EINVAL);
518 
519  for (i = 0; i < desc->nb_components; i++)
520  nb_planes = FFMAX(desc->comp[i].plane, nb_planes);
521 
522  nb_planes++;
523 
524  ret = av_image_fill_linesizes(linesize, pix_fmt, width);
525  av_assert0(ret >= 0); // was checked previously
526 
527  for (i = 0; i < nb_planes; i++) {
528  int h, shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
529  const uint8_t *src = src_data[i];
530  h = (height + (1 << shift) - 1) >> shift;
531 
532  for (j = 0; j < h; j++) {
533  memcpy(dst, src, linesize[i]);
534  dst += FFALIGN(linesize[i], align);
535  src += src_linesize[i];
536  }
537  }
538 
539  if (desc->flags & AV_PIX_FMT_FLAG_PAL) {
540  uint32_t *d32 = (uint32_t *)dst;
541 
542  for (i = 0; i<256; i++)
543  AV_WL32(d32 + i, AV_RN32(src_data[1] + 4*i));
544  }
545 
546  return size;
547 }
548 
549 // Fill dst[0..dst_size] with the bytes in clear[0..clear_size]. The clear
550 // bytes are repeated until dst_size is reached. If dst_size is unaligned (i.e.
551 // dst_size%clear_size!=0), the remaining data will be filled with the beginning
552 // of the clear data only.
553 static void memset_bytes(uint8_t *dst, size_t dst_size, uint8_t *clear,
554  size_t clear_size)
555 {
556  int same = 1;
557  int i;
558 
559  if (!clear_size)
560  return;
561 
562  // Reduce to memset() if possible.
563  for (i = 0; i < clear_size; i++) {
564  if (clear[i] != clear[0]) {
565  same = 0;
566  break;
567  }
568  }
569  if (same)
570  clear_size = 1;
571 
572  if (clear_size == 1) {
573  memset(dst, clear[0], dst_size);
574  } else {
575  if (clear_size > dst_size)
576  clear_size = dst_size;
577  memcpy(dst, clear, clear_size);
578  av_memcpy_backptr(dst + clear_size, clear_size, dst_size - clear_size);
579  }
580 }
581 
582 // Maximum size in bytes of a plane element (usually a pixel, or multiple pixels
583 // if it's a subsampled packed format).
584 #define MAX_BLOCK_SIZE 32
585 
586 int av_image_fill_black(uint8_t *dst_data[4], const ptrdiff_t dst_linesize[4],
587  enum AVPixelFormat pix_fmt, enum AVColorRange range,
588  int width, int height)
589 {
591  int nb_planes = av_pix_fmt_count_planes(pix_fmt);
592  // A pixel or a group of pixels on each plane, with a value that represents black.
593  // Consider e.g. AV_PIX_FMT_UYVY422 for non-trivial cases.
594  uint8_t clear_block[4][MAX_BLOCK_SIZE] = {{0}}; // clear padding with 0
595  int clear_block_size[4] = {0};
596  ptrdiff_t plane_line_bytes[4] = {0};
597  int rgb, limited;
598  int plane, c;
599 
600  if (!desc || nb_planes < 1 || nb_planes > 4 || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
601  return AVERROR(EINVAL);
602 
603  rgb = !!(desc->flags & AV_PIX_FMT_FLAG_RGB);
604  limited = !rgb && range != AVCOL_RANGE_JPEG;
605 
606  if (desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) {
607  ptrdiff_t bytewidth = av_image_get_linesize(pix_fmt, width, 0);
608  uint8_t *data;
610  int fill = pix_fmt == AV_PIX_FMT_MONOWHITE ? 0xFF : 0;
611  if (nb_planes != 1 || !(rgb || mono) || bytewidth < 1)
612  return AVERROR(EINVAL);
613 
614  if (!dst_data)
615  return 0;
616 
617  data = dst_data[0];
618 
619  // (Bitstream + alpha will be handled incorrectly - it'll remain transparent.)
620  for (;height > 0; height--) {
621  memset(data, fill, bytewidth);
622  data += dst_linesize[0];
623  }
624  return 0;
625  }
626 
627  for (c = 0; c < desc->nb_components; c++) {
628  const AVComponentDescriptor comp = desc->comp[c];
629 
630  // We try to operate on entire non-subsampled pixel groups (for
631  // AV_PIX_FMT_UYVY422 this would mean two consecutive pixels).
632  clear_block_size[comp.plane] = FFMAX(clear_block_size[comp.plane], comp.step);
633 
634  if (clear_block_size[comp.plane] > MAX_BLOCK_SIZE)
635  return AVERROR(EINVAL);
636  }
637 
638  // Create a byte array for clearing 1 pixel (sometimes several pixels).
639  for (c = 0; c < desc->nb_components; c++) {
640  const AVComponentDescriptor comp = desc->comp[c];
641  // (Multiple pixels happen e.g. with AV_PIX_FMT_UYVY422.)
642  int w = clear_block_size[comp.plane] / comp.step;
643  uint8_t *c_data[4];
644  const int c_linesize[4] = {0};
645  uint16_t src_array[MAX_BLOCK_SIZE];
646  uint16_t src = 0;
647  int x;
648 
649  if (comp.depth > 16)
650  return AVERROR(EINVAL);
651  if (!rgb && comp.depth < 8)
652  return AVERROR(EINVAL);
653  if (w < 1)
654  return AVERROR(EINVAL);
655 
656  if (c == 0 && limited) {
657  src = 16 << (comp.depth - 8);
658  } else if ((c == 1 || c == 2) && !rgb) {
659  src = 128 << (comp.depth - 8);
660  } else if (c == 3) {
661  // (Assume even limited YUV uses full range alpha.)
662  src = (1 << comp.depth) - 1;
663  }
664 
665  for (x = 0; x < w; x++)
666  src_array[x] = src;
667 
668  for (x = 0; x < 4; x++)
669  c_data[x] = &clear_block[x][0];
670 
671  av_write_image_line(src_array, c_data, c_linesize, desc, 0, 0, c, w);
672  }
673 
674  for (plane = 0; plane < nb_planes; plane++) {
675  plane_line_bytes[plane] = av_image_get_linesize(pix_fmt, width, plane);
676  if (plane_line_bytes[plane] < 0)
677  return AVERROR(EINVAL);
678  }
679 
680  if (!dst_data)
681  return 0;
682 
683  for (plane = 0; plane < nb_planes; plane++) {
684  size_t bytewidth = plane_line_bytes[plane];
685  uint8_t *data = dst_data[plane];
686  int chroma_div = plane == 1 || plane == 2 ? desc->log2_chroma_h : 0;
687  int plane_h = ((height + ( 1 << chroma_div) - 1)) >> chroma_div;
688 
689  for (; plane_h > 0; plane_h--) {
690  memset_bytes(data, bytewidth, &clear_block[plane][0], clear_block_size[plane]);
691  data += dst_linesize[plane];
692  }
693  }
694 
695  return 0;
696 }
uint8_t
simple assert() macros that are a bit more flexible than ISO C assert().
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define s(width, name)
Definition: cbs_vp9.c:257
common internal and external API header
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
#define FFMAX(a, b)
Definition: common.h:103
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
#define NULL
Definition: coverity.c:32
static enum AVPixelFormat pix_fmt
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
Definition: eamad.c:85
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd)
Rescale a 64-bit integer with specified rounding.
Definition: mathematics.c:58
@ AV_ROUND_ZERO
Round toward zero.
Definition: mathematics.h:80
void av_memcpy_backptr(uint8_t *dst, int back, int cnt)
Overlapping memcpy() implementation.
Definition: mem.c:428
int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align)
Return the size in bytes of the amount of data required to store an image with the given parameters.
Definition: imgutils.c:466
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:317
int av_image_fill_pointers(uint8_t *data[4], enum AVPixelFormat pix_fmt, int height, uint8_t *ptr, const int linesizes[4])
Fill plane data pointers for an image with pixel format pix_fmt and height height.
Definition: imgutils.c:146
int av_image_fill_black(uint8_t *dst_data[4], const ptrdiff_t dst_linesize[4], enum AVPixelFormat pix_fmt, enum AVColorRange range, int width, int height)
Overwrite the image data with black.
Definition: imgutils.c:586
int av_image_fill_plane_sizes(size_t sizes[4], enum AVPixelFormat pix_fmt, int height, const ptrdiff_t linesizes[4])
Fill plane sizes for an image with pixel format pix_fmt and height height.
Definition: imgutils.c:111
int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4], const uint8_t *src, enum AVPixelFormat pix_fmt, int width, int height, int align)
Setup the data pointers and linesizes based on the specified image parameters and the provided array.
Definition: imgutils.c:446
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4], const uint8_t *src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Copy image in src_data to dst_data.
Definition: imgutils.c:422
int av_image_copy_to_buffer(uint8_t *dst, int dst_size, const uint8_t *const src_data[4], const int src_linesize[4], enum AVPixelFormat pix_fmt, int width, int height, int align)
Copy image data from an image into a buffer.
Definition: imgutils.c:505
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:373
int av_image_alloc(uint8_t *pointers[4], int linesizes[4], int w, int h, enum AVPixelFormat pix_fmt, int align)
Allocate an image with size w and h and pixel format pix_fmt, and fill pointers and linesizes accordi...
Definition: imgutils.c:216
void av_image_copy_uc_from(uint8_t *dst_data[4], const ptrdiff_t dst_linesizes[4], const uint8_t *src_data[4], const ptrdiff_t src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Copy image data located in uncacheable (e.g.
Definition: imgutils.c:438
int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane)
Compute the size of an image line with format pix_fmt and width width for the plane plane.
Definition: imgutils.c:76
int av_image_check_size2(unsigned int w, unsigned int h, int64_t max_pixels, enum AVPixelFormat pix_fmt, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of a plane of an image with...
Definition: imgutils.c:288
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
Definition: imgutils.c:89
void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4], const AVPixFmtDescriptor *pixdesc)
Compute the max pixel step for each plane of an image with a format described by pixdesc.
Definition: imgutils.c:35
int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar)
Check if the given sample aspect ratio of an image is valid.
Definition: imgutils.c:322
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
for(j=16;j >0;--j)
static const int sizes[][2]
Definition: img2dec.c:53
static void image_copy_plane_uc_from(uint8_t *dst, ptrdiff_t dst_linesize, const uint8_t *src, ptrdiff_t src_linesize, ptrdiff_t bytewidth, int height)
Definition: imgutils.c:358
int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
Definition: imgutils.c:176
static int image_get_linesize(int width, int plane, int max_step, int max_step_comp, const AVPixFmtDescriptor *desc)
Definition: imgutils.c:54
static void image_copy_plane(uint8_t *dst, ptrdiff_t dst_linesize, const uint8_t *src, ptrdiff_t src_linesize, ptrdiff_t bytewidth, int height)
Definition: imgutils.c:343
#define MAX_BLOCK_SIZE
Definition: imgutils.c:584
static void image_copy(uint8_t *dst_data[4], const ptrdiff_t dst_linesizes[4], const uint8_t *src_data[4], const ptrdiff_t src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height, void(*copy_plane)(uint8_t *, ptrdiff_t, const uint8_t *, ptrdiff_t, ptrdiff_t, int))
Definition: imgutils.c:380
static const AVClass imgutils_class
Definition: imgutils.c:279
static void memset_bytes(uint8_t *dst, size_t dst_size, uint8_t *clear, size_t clear_size)
Definition: imgutils.c:553
misc image utilities
int ff_image_copy_plane_uc_from_x86(uint8_t *dst, ptrdiff_t dst_linesize, const uint8_t *src, ptrdiff_t src_linesize, ptrdiff_t bytewidth, int height)
Definition: imgutils_init.c:34
int i
Definition: input.c:407
#define AV_RN32(p)
Definition: intreadwrite.h:364
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
common internal API header
#define FF_PSEUDOPAL
Definition: internal.h:299
const char * desc
Definition: libsvtav1.c:79
uint8_t w
Definition: llviddspenc.c:39
int stride
Definition: mace.c:144
#define FFALIGN(x, a)
Definition: macros.h:48
const char data[16]
Definition: mxf.c:142
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2613
void av_write_image_line(const uint16_t *src, uint8_t *data[4], const int linesize[4], const AVPixFmtDescriptor *desc, int x, int y, int c, int w)
Definition: pixdesc.c:162
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
#define AV_PIX_FMT_FLAG_BITSTREAM
All values of a component are bit-wise packed end to end.
Definition: pixdesc.h:136
#define AV_PIX_FMT_FLAG_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale).
Definition: pixdesc.h:148
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:140
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:132
AVColorRange
Visual content value range.
Definition: pixfmt.h:551
@ AVCOL_RANGE_JPEG
Full range content.
Definition: pixfmt.h:586
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
@ AV_PIX_FMT_MONOBLACK
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb.
Definition: pixfmt.h:76
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
@ AV_PIX_FMT_RGB8
packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
Definition: pixfmt.h:86
@ AV_PIX_FMT_BGR8
packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
Definition: pixfmt.h:83
@ AV_PIX_FMT_RGB4_BYTE
packed RGB 1:2:1, 8bpp, (msb)1R 2G 1B(lsb)
Definition: pixfmt.h:88
@ AV_PIX_FMT_BGR4_BYTE
packed RGB 1:2:1, 8bpp, (msb)1B 2G 1R(lsb)
Definition: pixfmt.h:85
@ AV_PIX_FMT_MONOWHITE
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb.
Definition: pixfmt.h:75
static void copy_plane(AVCodecContext *avctx, AVFrame *src, AVFrame *dst)
Definition: rasc.c:82
Utilties for rational number calculation.
static const SheerTable rgb[2]
static int shift(int a, int b)
Definition: sonic.c:82
Describe the class of an AVClass context structure.
Definition: log.h:67
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int num
Numerator.
Definition: rational.h:59
int den
Denominator.
Definition: rational.h:60
void * log_ctx
Definition: imgutils.c:276
int log_offset
Definition: imgutils.c:275
const AVClass * class
Definition: imgutils.c:274
Definition: rpzaenc.c:58
#define av_free(p)
#define av_malloc(s)
#define av_log(a,...)
#define src
Definition: vp8dsp.c:255
#define height
#define width
int size
const char * b
Definition: vf_curves.c:118
const char * g
Definition: vf_curves.c:117
const char * r
Definition: vf_curves.c:116
static double c[64]
const uint8_t * d32
Definition: yuv2rgb.c:502