FFmpeg
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drawutils.c
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1 /*
2  * Copyright 2011 Stefano Sabatini <stefano.sabatini-lala poste it>
3  * Copyright 2012 Nicolas George <nicolas.george normalesup org>
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 <string.h>
23 
24 #include "libavutil/avassert.h"
25 #include "libavutil/avutil.h"
26 #include "libavutil/colorspace.h"
27 #include "libavutil/mem.h"
28 #include "libavutil/pixdesc.h"
29 #include "drawutils.h"
30 #include "formats.h"
31 
32 enum { RED = 0, GREEN, BLUE, ALPHA };
33 
35 {
36  switch (pix_fmt) {
37  case AV_PIX_FMT_0RGB:
38  case AV_PIX_FMT_ARGB: rgba_map[ALPHA] = 0; rgba_map[RED ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break;
39  case AV_PIX_FMT_0BGR:
40  case AV_PIX_FMT_ABGR: rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED ] = 3; break;
41  case AV_PIX_FMT_RGB48LE:
42  case AV_PIX_FMT_RGB48BE:
45  case AV_PIX_FMT_RGB0:
46  case AV_PIX_FMT_RGBA:
47  case AV_PIX_FMT_RGB24: rgba_map[RED ] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE ] = 2; rgba_map[ALPHA] = 3; break;
48  case AV_PIX_FMT_BGR48LE:
49  case AV_PIX_FMT_BGR48BE:
52  case AV_PIX_FMT_BGRA:
53  case AV_PIX_FMT_BGR0:
54  case AV_PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break;
55  case AV_PIX_FMT_GBRAP:
56  case AV_PIX_FMT_GBRP: rgba_map[GREEN] = 0; rgba_map[BLUE ] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break;
57  default: /* unsupported */
58  return AVERROR(EINVAL);
59  }
60  return 0;
61 }
62 
63 int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4],
64  enum AVPixelFormat pix_fmt, uint8_t rgba_color[4],
65  int *is_packed_rgba, uint8_t rgba_map_ptr[4])
66 {
67  uint8_t rgba_map[4] = {0};
68  int i;
69  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(pix_fmt);
70  int hsub;
71 
72  av_assert0(pix_desc);
73 
74  hsub = pix_desc->log2_chroma_w;
75 
76  *is_packed_rgba = ff_fill_rgba_map(rgba_map, pix_fmt) >= 0;
77 
78  if (*is_packed_rgba) {
79  pixel_step[0] = (av_get_bits_per_pixel(pix_desc))>>3;
80  for (i = 0; i < 4; i++)
81  dst_color[rgba_map[i]] = rgba_color[i];
82 
83  line[0] = av_malloc_array(w, pixel_step[0]);
84  if (!line[0])
85  return AVERROR(ENOMEM);
86  for (i = 0; i < w; i++)
87  memcpy(line[0] + i * pixel_step[0], dst_color, pixel_step[0]);
88  if (rgba_map_ptr)
89  memcpy(rgba_map_ptr, rgba_map, sizeof(rgba_map[0]) * 4);
90  } else {
91  int plane;
92 
93  dst_color[0] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
94  dst_color[1] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
95  dst_color[2] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
96  dst_color[3] = rgba_color[3];
97 
98  for (plane = 0; plane < 4; plane++) {
99  int line_size;
100  int hsub1 = (plane == 1 || plane == 2) ? hsub : 0;
101 
102  pixel_step[plane] = 1;
103  line_size = FF_CEIL_RSHIFT(w, hsub1) * pixel_step[plane];
104  line[plane] = av_malloc(line_size);
105  if (!line[plane]) {
106  while(plane && line[plane-1])
107  av_freep(&line[--plane]);
108  return AVERROR(ENOMEM);
109  }
110  memset(line[plane], dst_color[plane], line_size);
111  }
112  }
113 
114  return 0;
115 }
116 
117 void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4],
118  uint8_t *src[4], int pixelstep[4],
119  int hsub, int vsub, int x, int y, int w, int h)
120 {
121  int i, plane;
122  uint8_t *p;
123 
124  for (plane = 0; plane < 4 && dst[plane]; plane++) {
125  int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
126  int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
127  int width = FF_CEIL_RSHIFT(w, hsub1);
128  int height = FF_CEIL_RSHIFT(h, vsub1);
129 
130  p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
131  for (i = 0; i < height; i++) {
132  memcpy(p + (x >> hsub1) * pixelstep[plane],
133  src[plane], width * pixelstep[plane]);
134  p += dst_linesize[plane];
135  }
136  }
137 }
138 
139 void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4],
140  uint8_t *src[4], int src_linesize[4], int pixelstep[4],
141  int hsub, int vsub, int x, int y, int y2, int w, int h)
142 {
143  int i, plane;
144  uint8_t *p;
145 
146  for (plane = 0; plane < 4 && dst[plane]; plane++) {
147  int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
148  int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
149  int width = FF_CEIL_RSHIFT(w, hsub1);
150  int height = FF_CEIL_RSHIFT(h, vsub1);
151 
152  p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
153  for (i = 0; i < height; i++) {
154  memcpy(p + (x >> hsub1) * pixelstep[plane],
155  src[plane] + src_linesize[plane]*(i+(y2>>vsub1)), width * pixelstep[plane]);
156  p += dst_linesize[plane];
157  }
158  }
159 }
160 
161 int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
162 {
163  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format);
164  const AVComponentDescriptor *c;
165  unsigned i, nb_planes = 0;
166  int pixelstep[MAX_PLANES] = { 0 };
167 
168  if (!desc || !desc->name)
169  return AVERROR(EINVAL);
171  return AVERROR(ENOSYS);
172  for (i = 0; i < desc->nb_components; i++) {
173  c = &desc->comp[i];
174  /* for now, only 8-bits formats */
175  if (c->depth_minus1 != 8 - 1)
176  return AVERROR(ENOSYS);
177  if (c->plane >= MAX_PLANES)
178  return AVERROR(ENOSYS);
179  /* strange interleaving */
180  if (pixelstep[c->plane] != 0 &&
181  pixelstep[c->plane] != c->step_minus1 + 1)
182  return AVERROR(ENOSYS);
183  pixelstep[c->plane] = c->step_minus1 + 1;
184  if (pixelstep[c->plane] >= 8)
185  return AVERROR(ENOSYS);
186  nb_planes = FFMAX(nb_planes, c->plane + 1);
187  }
188  if ((desc->log2_chroma_w || desc->log2_chroma_h) && nb_planes < 3)
189  return AVERROR(ENOSYS); /* exclude NV12 and NV21 */
190  memset(draw, 0, sizeof(*draw));
191  draw->desc = desc;
192  draw->format = format;
193  draw->nb_planes = nb_planes;
194  memcpy(draw->pixelstep, pixelstep, sizeof(draw->pixelstep));
195  draw->hsub[1] = draw->hsub[2] = draw->hsub_max = desc->log2_chroma_w;
196  draw->vsub[1] = draw->vsub[2] = draw->vsub_max = desc->log2_chroma_h;
197  for (i = 0; i < ((desc->nb_components - 1) | 1); i++)
198  draw->comp_mask[desc->comp[i].plane] |=
199  1 << (desc->comp[i].offset_plus1 - 1);
200  return 0;
201 }
202 
204 {
205  unsigned i;
206  uint8_t rgba_map[4];
207 
208  if (rgba != color->rgba)
209  memcpy(color->rgba, rgba, sizeof(color->rgba));
210  if ((draw->desc->flags & AV_PIX_FMT_FLAG_RGB) &&
211  ff_fill_rgba_map(rgba_map, draw->format) >= 0) {
212  if (draw->nb_planes == 1) {
213  for (i = 0; i < 4; i++)
214  color->comp[0].u8[rgba_map[i]] = rgba[i];
215  } else {
216  for (i = 0; i < 4; i++)
217  color->comp[rgba_map[i]].u8[0] = rgba[i];
218  }
219  } else if (draw->nb_planes == 3 || draw->nb_planes == 4) {
220  /* assume YUV */
221  color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
222  color->comp[1].u8[0] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0);
223  color->comp[2].u8[0] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0);
224  color->comp[3].u8[0] = rgba[3];
225  } else if (draw->format == AV_PIX_FMT_GRAY8 || draw->format == AV_PIX_FMT_GRAY8A) {
226  color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
227  color->comp[1].u8[0] = rgba[3];
228  } else {
230  "Color conversion not implemented for %s\n", draw->desc->name);
231  memset(color, 128, sizeof(*color));
232  }
233 }
234 
235 static uint8_t *pointer_at(FFDrawContext *draw, uint8_t *data[], int linesize[],
236  int plane, int x, int y)
237 {
238  return data[plane] +
239  (y >> draw->vsub[plane]) * linesize[plane] +
240  (x >> draw->hsub[plane]) * draw->pixelstep[plane];
241 }
242 
244  uint8_t *dst[], int dst_linesize[],
245  uint8_t *src[], int src_linesize[],
246  int dst_x, int dst_y, int src_x, int src_y,
247  int w, int h)
248 {
249  int plane, y, wp, hp;
250  uint8_t *p, *q;
251 
252  for (plane = 0; plane < draw->nb_planes; plane++) {
253  p = pointer_at(draw, src, src_linesize, plane, src_x, src_y);
254  q = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
255  wp = FF_CEIL_RSHIFT(w, draw->hsub[plane]) * draw->pixelstep[plane];
256  hp = FF_CEIL_RSHIFT(h, draw->vsub[plane]);
257  for (y = 0; y < hp; y++) {
258  memcpy(q, p, wp);
259  p += src_linesize[plane];
260  q += dst_linesize[plane];
261  }
262  }
263 }
264 
266  uint8_t *dst[], int dst_linesize[],
267  int dst_x, int dst_y, int w, int h)
268 {
269  int plane, x, y, wp, hp;
270  uint8_t *p0, *p;
271 
272  for (plane = 0; plane < draw->nb_planes; plane++) {
273  p0 = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
274  wp = FF_CEIL_RSHIFT(w, draw->hsub[plane]);
275  hp = FF_CEIL_RSHIFT(h, draw->vsub[plane]);
276  if (!hp)
277  return;
278  p = p0;
279  /* copy first line from color */
280  for (x = 0; x < wp; x++) {
281  memcpy(p, color->comp[plane].u8, draw->pixelstep[plane]);
282  p += draw->pixelstep[plane];
283  }
284  wp *= draw->pixelstep[plane];
285  /* copy next lines from first line */
286  p = p0 + dst_linesize[plane];
287  for (y = 1; y < hp; y++) {
288  memcpy(p, p0, wp);
289  p += dst_linesize[plane];
290  }
291  }
292 }
293 
294 /**
295  * Clip interval [x; x+w[ within [0; wmax[.
296  * The resulting w may be negative if the final interval is empty.
297  * dx, if not null, return the difference between in and out value of x.
298  */
299 static void clip_interval(int wmax, int *x, int *w, int *dx)
300 {
301  if (dx)
302  *dx = 0;
303  if (*x < 0) {
304  if (dx)
305  *dx = -*x;
306  *w += *x;
307  *x = 0;
308  }
309  if (*x + *w > wmax)
310  *w = wmax - *x;
311 }
312 
313 /**
314  * Decompose w pixels starting at x
315  * into start + (w starting at x) + end
316  * with x and w aligned on multiples of 1<<sub.
317  */
318 static void subsampling_bounds(int sub, int *x, int *w, int *start, int *end)
319 {
320  int mask = (1 << sub) - 1;
321 
322  *start = (-*x) & mask;
323  *x += *start;
324  *start = FFMIN(*start, *w);
325  *w -= *start;
326  *end = *w & mask;
327  *w >>= sub;
328 }
329 
330 static int component_used(FFDrawContext *draw, int plane, int comp)
331 {
332  return (draw->comp_mask[plane] >> comp) & 1;
333 }
334 
335 /* If alpha is in the [ 0 ; 0x1010101 ] range,
336  then alpha * value is in the [ 0 ; 0xFFFFFFFF ] range,
337  and >> 24 gives a correct rounding. */
338 static void blend_line(uint8_t *dst, unsigned src, unsigned alpha,
339  int dx, int w, unsigned hsub, int left, int right)
340 {
341  unsigned asrc = alpha * src;
342  unsigned tau = 0x1010101 - alpha;
343  int x;
344 
345  if (left) {
346  unsigned suba = (left * alpha) >> hsub;
347  *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
348  dst += dx;
349  }
350  for (x = 0; x < w; x++) {
351  *dst = (*dst * tau + asrc) >> 24;
352  dst += dx;
353  }
354  if (right) {
355  unsigned suba = (right * alpha) >> hsub;
356  *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
357  }
358 }
359 
361  uint8_t *dst[], int dst_linesize[],
362  int dst_w, int dst_h,
363  int x0, int y0, int w, int h)
364 {
365  unsigned alpha, nb_planes, nb_comp, plane, comp;
366  int w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
367  uint8_t *p0, *p;
368 
369  /* TODO optimize if alpha = 0xFF */
370  clip_interval(dst_w, &x0, &w, NULL);
371  clip_interval(dst_h, &y0, &h, NULL);
372  if (w <= 0 || h <= 0 || !color->rgba[3])
373  return;
374  /* 0x10203 * alpha + 2 is in the [ 2 ; 0x1010101 - 2 ] range */
375  alpha = 0x10203 * color->rgba[3] + 0x2;
376  nb_planes = (draw->nb_planes - 1) | 1; /* eliminate alpha */
377  for (plane = 0; plane < nb_planes; plane++) {
378  nb_comp = draw->pixelstep[plane];
379  p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);
380  w_sub = w;
381  h_sub = h;
382  x_sub = x0;
383  y_sub = y0;
384  subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);
385  subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);
386  for (comp = 0; comp < nb_comp; comp++) {
387  if (!component_used(draw, plane, comp))
388  continue;
389  p = p0 + comp;
390  if (top) {
391  blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
392  draw->pixelstep[plane], w_sub,
393  draw->hsub[plane], left, right);
394  p += dst_linesize[plane];
395  }
396  for (y = 0; y < h_sub; y++) {
397  blend_line(p, color->comp[plane].u8[comp], alpha,
398  draw->pixelstep[plane], w_sub,
399  draw->hsub[plane], left, right);
400  p += dst_linesize[plane];
401  }
402  if (bottom)
403  blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
404  draw->pixelstep[plane], w_sub,
405  draw->hsub[plane], left, right);
406  }
407  }
408 }
409 
410 static void blend_pixel(uint8_t *dst, unsigned src, unsigned alpha,
411  uint8_t *mask, int mask_linesize, int l2depth,
412  unsigned w, unsigned h, unsigned shift, unsigned xm0)
413 {
414  unsigned xm, x, y, t = 0;
415  unsigned xmshf = 3 - l2depth;
416  unsigned xmmod = 7 >> l2depth;
417  unsigned mbits = (1 << (1 << l2depth)) - 1;
418  unsigned mmult = 255 / mbits;
419 
420  for (y = 0; y < h; y++) {
421  xm = xm0;
422  for (x = 0; x < w; x++) {
423  t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)
424  * mmult;
425  xm++;
426  }
427  mask += mask_linesize;
428  }
429  alpha = (t >> shift) * alpha;
430  *dst = ((0x1010101 - alpha) * *dst + alpha * src) >> 24;
431 }
432 
433 static void blend_line_hv(uint8_t *dst, int dst_delta,
434  unsigned src, unsigned alpha,
435  uint8_t *mask, int mask_linesize, int l2depth, int w,
436  unsigned hsub, unsigned vsub,
437  int xm, int left, int right, int hband)
438 {
439  int x;
440 
441  if (left) {
442  blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
443  left, hband, hsub + vsub, xm);
444  dst += dst_delta;
445  xm += left;
446  }
447  for (x = 0; x < w; x++) {
448  blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
449  1 << hsub, hband, hsub + vsub, xm);
450  dst += dst_delta;
451  xm += 1 << hsub;
452  }
453  if (right)
454  blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
455  right, hband, hsub + vsub, xm);
456 }
457 
459  uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h,
460  uint8_t *mask, int mask_linesize, int mask_w, int mask_h,
461  int l2depth, unsigned endianness, int x0, int y0)
462 {
463  unsigned alpha, nb_planes, nb_comp, plane, comp;
464  int xm0, ym0, w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
465  uint8_t *p0, *p, *m;
466 
467  clip_interval(dst_w, &x0, &mask_w, &xm0);
468  clip_interval(dst_h, &y0, &mask_h, &ym0);
469  mask += ym0 * mask_linesize;
470  if (mask_w <= 0 || mask_h <= 0 || !color->rgba[3])
471  return;
472  /* alpha is in the [ 0 ; 0x10203 ] range,
473  alpha * mask is in the [ 0 ; 0x1010101 - 4 ] range */
474  alpha = (0x10307 * color->rgba[3] + 0x3) >> 8;
475  nb_planes = (draw->nb_planes - 1) | 1; /* eliminate alpha */
476  for (plane = 0; plane < nb_planes; plane++) {
477  nb_comp = draw->pixelstep[plane];
478  p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);
479  w_sub = mask_w;
480  h_sub = mask_h;
481  x_sub = x0;
482  y_sub = y0;
483  subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);
484  subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);
485  for (comp = 0; comp < nb_comp; comp++) {
486  if (!component_used(draw, plane, comp))
487  continue;
488  p = p0 + comp;
489  m = mask;
490  if (top) {
491  blend_line_hv(p, draw->pixelstep[plane],
492  color->comp[plane].u8[comp], alpha,
493  m, mask_linesize, l2depth, w_sub,
494  draw->hsub[plane], draw->vsub[plane],
495  xm0, left, right, top);
496  p += dst_linesize[plane];
497  m += top * mask_linesize;
498  }
499  for (y = 0; y < h_sub; y++) {
500  blend_line_hv(p, draw->pixelstep[plane],
501  color->comp[plane].u8[comp], alpha,
502  m, mask_linesize, l2depth, w_sub,
503  draw->hsub[plane], draw->vsub[plane],
504  xm0, left, right, 1 << draw->vsub[plane]);
505  p += dst_linesize[plane];
506  m += mask_linesize << draw->vsub[plane];
507  }
508  if (bottom)
509  blend_line_hv(p, draw->pixelstep[plane],
510  color->comp[plane].u8[comp], alpha,
511  m, mask_linesize, l2depth, w_sub,
512  draw->hsub[plane], draw->vsub[plane],
513  xm0, left, right, bottom);
514  }
515  }
516 }
517 
518 int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir,
519  int value)
520 {
521  unsigned shift = sub_dir ? draw->vsub_max : draw->hsub_max;
522 
523  if (!shift)
524  return value;
525  if (round_dir >= 0)
526  value += round_dir ? (1 << shift) - 1 : 1 << (shift - 1);
527  return (value >> shift) << shift;
528 }
529 
531 {
532  enum AVPixelFormat i;
533  FFDrawContext draw;
534  AVFilterFormats *fmts = NULL;
535 
536  for (i = 0; av_pix_fmt_desc_get(i); i++)
537  if (ff_draw_init(&draw, i, flags) >= 0)
538  ff_add_format(&fmts, i);
539  return fmts;
540 }
541 
542 #ifdef TEST
543 
544 #undef printf
545 
546 int main(void)
547 {
548  enum AVPixelFormat f;
549  const AVPixFmtDescriptor *desc;
550  FFDrawContext draw;
552  int r, i;
553 
554  for (f = 0; av_pix_fmt_desc_get(f); f++) {
555  desc = av_pix_fmt_desc_get(f);
556  if (!desc->name)
557  continue;
558  printf("Testing %s...%*s", desc->name,
559  (int)(16 - strlen(desc->name)), "");
560  r = ff_draw_init(&draw, f, 0);
561  if (r < 0) {
562  char buf[128];
563  av_strerror(r, buf, sizeof(buf));
564  printf("no: %s\n", buf);
565  continue;
566  }
567  ff_draw_color(&draw, &color, (uint8_t[]) { 1, 0, 0, 1 });
568  for (i = 0; i < sizeof(color); i++)
569  if (((uint8_t *)&color)[i] != 128)
570  break;
571  if (i == sizeof(color)) {
572  printf("fallback color\n");
573  continue;
574  }
575  printf("ok\n");
576  }
577  return 0;
578 }
579 
580 #endif
void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h, uint8_t *mask, int mask_linesize, int mask_w, int mask_h, int l2depth, unsigned endianness, int x0, int y0)
Blend an alpha mask with an uniform color.
Definition: drawutils.c:458
int plane
Definition: avisynth_c.h:291
AVFilterFormats * ff_draw_supported_pixel_formats(unsigned flags)
Return the list of pixel formats supported by the draw functions.
Definition: drawutils.c:530
#define NULL
Definition: coverity.c:32
static enum AVPixelFormat pix_fmt
static int shift(int a, int b)
Definition: sonic.c:82
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2090
void ff_copy_rectangle2(FFDrawContext *draw, uint8_t *dst[], int dst_linesize[], uint8_t *src[], int src_linesize[], int dst_x, int dst_y, int src_x, int src_y, int w, int h)
Copy a rectangle from an image to another.
Definition: drawutils.c:243
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:262
uint8_t hsub[MAX_PLANES]
Definition: drawutils.h:54
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:65
memory handling functions
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
Definition: pixdesc.c:2042
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:176
packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:261
Various defines for YUV<->RGB conversion.
external API header
static void blend_line(uint8_t *dst, unsigned src, unsigned alpha, int dx, int w, unsigned hsub, int left, int right)
Definition: drawutils.c:338
packed BGR 8:8:8, 32bpp, XBGRXBGR... X=unused/undefined
Definition: pixfmt.h:266
Definition: drawutils.c:32
Definition: drawutils.c:32
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:80
static void clip_interval(int wmax, int *x, int *w, int *dx)
Clip interval [x; x+w[ within [0; wmax[.
Definition: drawutils.c:299
int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir, int value)
Round a dimension according to subsampling.
Definition: drawutils.c:518
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:100
uint8_t
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
Definition: pixdesc.h:156
#define av_malloc(s)
packed RGB 8:8:8, 32bpp, RGBXRGBX... X=unused/undefined
Definition: pixfmt.h:265
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as lit...
Definition: pixfmt.h:112
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:94
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:67
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:259
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:96
uint8_t comp_mask[MAX_PLANES]
Definition: drawutils.h:53
#define av_log(a,...)
unsigned m
Definition: audioconvert.c:187
const char * name
Definition: pixdesc.h:70
uint16_t depth_minus1
Number of bits in the component minus 1.
Definition: pixdesc.h:57
static double alpha(void *priv, double x, double y)
Definition: vf_geq.c:99
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:89
static const uint16_t mask[17]
Definition: lzw.c:38
#define AVERROR(e)
Definition: error.h:43
#define AV_PIX_FMT_FLAG_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale).
Definition: pixdesc.h:131
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:97
const char * r
Definition: vf_curves.c:107
void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
Prepare a color.
Definition: drawutils.c:203
Definition: graph2dot.c:48
simple assert() macros that are a bit more flexible than ISO C assert().
uint8_t u8[4]
Definition: drawutils.h:65
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:323
uint8_t vsub_max
Definition: drawutils.h:57
#define FFMAX(a, b)
Definition: common.h:64
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:94
packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as lit...
Definition: pixfmt.h:149
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:95
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:71
alias for AV_PIX_FMT_YA8
Definition: pixfmt.h:146
#define FFMIN(a, b)
Definition: common.h:66
float y
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
#define FF_CEIL_RSHIFT(a, b)
Definition: common.h:57
#define AV_PIX_FMT_FLAG_PSEUDOPAL
The pixel format is "pseudo-paletted".
Definition: pixdesc.h:141
#define MAX_PLANES
Definition: ffv1.h:50
static void blend_line_hv(uint8_t *dst, int dst_delta, unsigned src, unsigned alpha, uint8_t *mask, int mask_linesize, int l2depth, int w, unsigned hsub, unsigned vsub, int xm, int left, int right, int hband)
Definition: drawutils.c:433
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:66
packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as big...
Definition: pixfmt.h:148
static uint8_t * pointer_at(FFDrawContext *draw, uint8_t *data[], int linesize[], int plane, int x, int y)
Definition: drawutils.c:235
int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
Definition: drawutils.c:34
static void subsampling_bounds(int sub, int *x, int *w, int *start, int *end)
Decompose w pixels starting at x into start + (w starting at x) + end with x and w aligned on multipl...
Definition: drawutils.c:318
AVS_Value src
Definition: avisynth_c.h:482
misc drawing utilities
unsigned nb_planes
Definition: drawutils.h:51
uint8_t flags
Definition: pixdesc.h:90
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
void * buf
Definition: avisynth_c.h:553
uint8_t hsub_max
Definition: drawutils.h:56
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
void ff_blend_rectangle(FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h, int x0, int y0, int w, int h)
Blend a rectangle with an uniform color.
Definition: drawutils.c:360
void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4], uint8_t *src[4], int src_linesize[4], int pixelstep[4], int hsub, int vsub, int x, int y, int y2, int w, int h)
Definition: drawutils.c:139
uint16_t step_minus1
Number of elements between 2 horizontally consecutive pixels minus 1.
Definition: pixdesc.h:40
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
Definition: pixfmt.h:267
int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
Init a draw context.
Definition: drawutils.c:161
static int component_used(FFDrawContext *draw, int plane, int comp)
Definition: drawutils.c:330
#define RGB_TO_U_CCIR(r1, g1, b1, shift)
Definition: colorspace.h:91
static int flags
Definition: cpu.c:47
int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
Put a description of the AVERROR code errnum in errbuf.
Definition: error.c:68
#define RGB_TO_V_CCIR(r1, g1, b1, shift)
Definition: colorspace.h:95
uint16_t plane
Which of the 4 planes contains the component.
Definition: pixdesc.h:34
Y , 8bpp.
Definition: pixfmt.h:71
union FFDrawColor::@126 comp[MAX_PLANES]
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:287
static double c[64]
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as big...
Definition: pixfmt.h:111
static void blend_pixel(uint8_t *dst, unsigned src, unsigned alpha, uint8_t *mask, int mask_linesize, int l2depth, unsigned w, unsigned h, unsigned shift, unsigned xm0)
Definition: drawutils.c:410
#define RGB_TO_Y_CCIR(r, g, b)
Definition: colorspace.h:87
uint16_t offset_plus1
Number of elements before the component of the first pixel plus 1.
Definition: pixdesc.h:46
int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4], enum AVPixelFormat pix_fmt, uint8_t rgba_color[4], int *is_packed_rgba, uint8_t rgba_map_ptr[4])
Definition: drawutils.c:63
int pixelstep[MAX_PLANES]
Definition: drawutils.h:52
A list of supported formats for one end of a filter link.
Definition: formats.h:64
const struct AVPixFmtDescriptor * desc
Definition: drawutils.h:49
void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_x, int dst_y, int w, int h)
Fill a rectangle with an uniform color.
Definition: drawutils.c:265
uint8_t vsub[MAX_PLANES]
Definition: drawutils.h:55
#define av_freep(p)
static void comp(unsigned char *dst, int dst_stride, unsigned char *src, int src_stride, int add)
Definition: eamad.c:83
void INT64 start
Definition: avisynth_c.h:553
#define av_malloc_array(a, b)
int main(int argc, char **argv)
Definition: main.c:22
void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4], uint8_t *src[4], int pixelstep[4], int hsub, int vsub, int x, int y, int w, int h)
Definition: drawutils.c:117
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
Definition: pixfmt.h:264
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:127
enum AVPixelFormat format
Definition: drawutils.h:50
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
Definition: pixfmt.h:260
uint8_t rgba[4]
Definition: drawutils.h:61
static int width