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vf_overlay.c
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1 /*
2  * Copyright (c) 2010 Stefano Sabatini
3  * Copyright (c) 2010 Baptiste Coudurier
4  * Copyright (c) 2007 Bobby Bingham
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * overlay one video on top of another
26  */
27 
28 #include "avfilter.h"
29 #include "formats.h"
30 #include "libavutil/common.h"
31 #include "libavutil/eval.h"
32 #include "libavutil/avstring.h"
33 #include "libavutil/pixdesc.h"
34 #include "libavutil/imgutils.h"
35 #include "libavutil/mathematics.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/timestamp.h"
38 #include "internal.h"
39 #include "drawutils.h"
40 #include "framesync.h"
41 #include "video.h"
42 #include "vf_overlay.h"
43 
44 typedef struct ThreadData {
46 } ThreadData;
47 
48 static const char *const var_names[] = {
49  "main_w", "W", ///< width of the main video
50  "main_h", "H", ///< height of the main video
51  "overlay_w", "w", ///< width of the overlay video
52  "overlay_h", "h", ///< height of the overlay video
53  "hsub",
54  "vsub",
55  "x",
56  "y",
57  "n", ///< number of frame
58  "pos", ///< position in the file
59  "t", ///< timestamp expressed in seconds
60  NULL
61 };
62 
63 #define MAIN 0
64 #define OVERLAY 1
65 
66 #define R 0
67 #define G 1
68 #define B 2
69 #define A 3
70 
71 #define Y 0
72 #define U 1
73 #define V 2
74 
75 enum EvalMode {
79 };
80 
82 {
83  OverlayContext *s = ctx->priv;
84 
86  av_expr_free(s->x_pexpr); s->x_pexpr = NULL;
87  av_expr_free(s->y_pexpr); s->y_pexpr = NULL;
88 }
89 
90 static inline int normalize_xy(double d, int chroma_sub)
91 {
92  if (isnan(d))
93  return INT_MAX;
94  return (int)d & ~((1 << chroma_sub) - 1);
95 }
96 
98 {
99  OverlayContext *s = ctx->priv;
100 
103  /* It is necessary if x is expressed from y */
105  s->x = normalize_xy(s->var_values[VAR_X], s->hsub);
106  s->y = normalize_xy(s->var_values[VAR_Y], s->vsub);
107 }
108 
109 static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx)
110 {
111  int ret;
112  AVExpr *old = NULL;
113 
114  if (*pexpr)
115  old = *pexpr;
116  ret = av_expr_parse(pexpr, expr, var_names,
117  NULL, NULL, NULL, NULL, 0, log_ctx);
118  if (ret < 0) {
119  av_log(log_ctx, AV_LOG_ERROR,
120  "Error when evaluating the expression '%s' for %s\n",
121  expr, option);
122  *pexpr = old;
123  return ret;
124  }
125 
126  av_expr_free(old);
127  return 0;
128 }
129 
130 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
131  char *res, int res_len, int flags)
132 {
133  OverlayContext *s = ctx->priv;
134  int ret;
135 
136  if (!strcmp(cmd, "x"))
137  ret = set_expr(&s->x_pexpr, args, cmd, ctx);
138  else if (!strcmp(cmd, "y"))
139  ret = set_expr(&s->y_pexpr, args, cmd, ctx);
140  else
141  ret = AVERROR(ENOSYS);
142 
143  if (ret < 0)
144  return ret;
145 
146  if (s->eval_mode == EVAL_MODE_INIT) {
147  eval_expr(ctx);
148  av_log(ctx, AV_LOG_VERBOSE, "x:%f xi:%d y:%f yi:%d\n",
149  s->var_values[VAR_X], s->x,
150  s->var_values[VAR_Y], s->y);
151  }
152  return ret;
153 }
154 
155 static const enum AVPixelFormat alpha_pix_fmts[] = {
159 };
160 
162 {
163  OverlayContext *s = ctx->priv;
164 
165  /* overlay formats contains alpha, for avoiding conversion with alpha information loss */
166  static const enum AVPixelFormat main_pix_fmts_yuv420[] = {
170  };
171  static const enum AVPixelFormat overlay_pix_fmts_yuv420[] = {
173  };
174 
175  static const enum AVPixelFormat main_pix_fmts_yuv422[] = {
177  };
178  static const enum AVPixelFormat overlay_pix_fmts_yuv422[] = {
180  };
181 
182  static const enum AVPixelFormat main_pix_fmts_yuv444[] = {
184  };
185  static const enum AVPixelFormat overlay_pix_fmts_yuv444[] = {
187  };
188 
189  static const enum AVPixelFormat main_pix_fmts_gbrp[] = {
191  };
192  static const enum AVPixelFormat overlay_pix_fmts_gbrp[] = {
194  };
195 
196  static const enum AVPixelFormat main_pix_fmts_rgb[] = {
201  };
202  static const enum AVPixelFormat overlay_pix_fmts_rgb[] = {
206  };
207 
208  AVFilterFormats *main_formats = NULL;
209  AVFilterFormats *overlay_formats = NULL;
210  int ret;
211 
212  switch (s->format) {
214  if (!(main_formats = ff_make_format_list(main_pix_fmts_yuv420)) ||
215  !(overlay_formats = ff_make_format_list(overlay_pix_fmts_yuv420))) {
216  ret = AVERROR(ENOMEM);
217  goto fail;
218  }
219  break;
221  if (!(main_formats = ff_make_format_list(main_pix_fmts_yuv422)) ||
222  !(overlay_formats = ff_make_format_list(overlay_pix_fmts_yuv422))) {
223  ret = AVERROR(ENOMEM);
224  goto fail;
225  }
226  break;
228  if (!(main_formats = ff_make_format_list(main_pix_fmts_yuv444)) ||
229  !(overlay_formats = ff_make_format_list(overlay_pix_fmts_yuv444))) {
230  ret = AVERROR(ENOMEM);
231  goto fail;
232  }
233  break;
234  case OVERLAY_FORMAT_RGB:
235  if (!(main_formats = ff_make_format_list(main_pix_fmts_rgb)) ||
236  !(overlay_formats = ff_make_format_list(overlay_pix_fmts_rgb))) {
237  ret = AVERROR(ENOMEM);
238  goto fail;
239  }
240  break;
241  case OVERLAY_FORMAT_GBRP:
242  if (!(main_formats = ff_make_format_list(main_pix_fmts_gbrp)) ||
243  !(overlay_formats = ff_make_format_list(overlay_pix_fmts_gbrp))) {
244  ret = AVERROR(ENOMEM);
245  goto fail;
246  }
247  break;
248  case OVERLAY_FORMAT_AUTO:
249  if (!(main_formats = ff_make_format_list(alpha_pix_fmts))) {
250  ret = AVERROR(ENOMEM);
251  goto fail;
252  }
253  break;
254  default:
255  av_assert0(0);
256  }
257 
258  if (s->format == OVERLAY_FORMAT_AUTO) {
259  ret = ff_set_common_formats(ctx, main_formats);
260  if (ret < 0)
261  goto fail;
262  } else {
263  if ((ret = ff_formats_ref(main_formats , &ctx->inputs[MAIN]->out_formats )) < 0 ||
264  (ret = ff_formats_ref(overlay_formats, &ctx->inputs[OVERLAY]->out_formats)) < 0 ||
265  (ret = ff_formats_ref(main_formats , &ctx->outputs[MAIN]->in_formats )) < 0)
266  goto fail;
267  }
268 
269  return 0;
270 fail:
271  if (main_formats)
272  av_freep(&main_formats->formats);
273  av_freep(&main_formats);
274  if (overlay_formats)
275  av_freep(&overlay_formats->formats);
276  av_freep(&overlay_formats);
277  return ret;
278 }
279 
281 {
282  AVFilterContext *ctx = inlink->dst;
283  OverlayContext *s = inlink->dst->priv;
284  int ret;
285  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
286 
288 
289  /* Finish the configuration by evaluating the expressions
290  now when both inputs are configured. */
291  s->var_values[VAR_MAIN_W ] = s->var_values[VAR_MW] = ctx->inputs[MAIN ]->w;
292  s->var_values[VAR_MAIN_H ] = s->var_values[VAR_MH] = ctx->inputs[MAIN ]->h;
295  s->var_values[VAR_HSUB] = 1<<pix_desc->log2_chroma_w;
296  s->var_values[VAR_VSUB] = 1<<pix_desc->log2_chroma_h;
297  s->var_values[VAR_X] = NAN;
298  s->var_values[VAR_Y] = NAN;
299  s->var_values[VAR_N] = 0;
300  s->var_values[VAR_T] = NAN;
301  s->var_values[VAR_POS] = NAN;
302 
303  if ((ret = set_expr(&s->x_pexpr, s->x_expr, "x", ctx)) < 0 ||
304  (ret = set_expr(&s->y_pexpr, s->y_expr, "y", ctx)) < 0)
305  return ret;
306 
308  ff_fill_rgba_map(s->overlay_rgba_map, inlink->format) >= 0;
310 
311  if (s->eval_mode == EVAL_MODE_INIT) {
312  eval_expr(ctx);
313  av_log(ctx, AV_LOG_VERBOSE, "x:%f xi:%d y:%f yi:%d\n",
314  s->var_values[VAR_X], s->x,
315  s->var_values[VAR_Y], s->y);
316  }
317 
318  av_log(ctx, AV_LOG_VERBOSE,
319  "main w:%d h:%d fmt:%s overlay w:%d h:%d fmt:%s\n",
320  ctx->inputs[MAIN]->w, ctx->inputs[MAIN]->h,
322  ctx->inputs[OVERLAY]->w, ctx->inputs[OVERLAY]->h,
324  return 0;
325 }
326 
327 static int config_output(AVFilterLink *outlink)
328 {
329  AVFilterContext *ctx = outlink->src;
330  OverlayContext *s = ctx->priv;
331  int ret;
332 
333  if ((ret = ff_framesync_init_dualinput(&s->fs, ctx)) < 0)
334  return ret;
335 
336  outlink->w = ctx->inputs[MAIN]->w;
337  outlink->h = ctx->inputs[MAIN]->h;
338  outlink->time_base = ctx->inputs[MAIN]->time_base;
339 
340  return ff_framesync_configure(&s->fs);
341 }
342 
343 // divide by 255 and round to nearest
344 // apply a fast variant: (X+127)/255 = ((X+127)*257+257)>>16 = ((X+128)*257)>>16
345 #define FAST_DIV255(x) ((((x) + 128) * 257) >> 16)
346 
347 // calculate the unpremultiplied alpha, applying the general equation:
348 // alpha = alpha_overlay / ( (alpha_main + alpha_overlay) - (alpha_main * alpha_overlay) )
349 // (((x) << 16) - ((x) << 9) + (x)) is a faster version of: 255 * 255 * x
350 // ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)) is a faster version of: 255 * (x + y)
351 #define UNPREMULTIPLY_ALPHA(x, y) ((((x) << 16) - ((x) << 9) + (x)) / ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)))
352 
353 /**
354  * Blend image in src to destination buffer dst at position (x, y).
355  */
356 
358  AVFrame *dst, const AVFrame *src,
359  int main_has_alpha, int x, int y,
360  int is_straight, int jobnr, int nb_jobs)
361 {
362  OverlayContext *s = ctx->priv;
363  int i, imax, j, jmax;
364  const int src_w = src->width;
365  const int src_h = src->height;
366  const int dst_w = dst->width;
367  const int dst_h = dst->height;
368  uint8_t alpha; ///< the amount of overlay to blend on to main
369  const int dr = s->main_rgba_map[R];
370  const int dg = s->main_rgba_map[G];
371  const int db = s->main_rgba_map[B];
372  const int da = s->main_rgba_map[A];
373  const int dstep = s->main_pix_step[0];
374  const int sr = s->overlay_rgba_map[R];
375  const int sg = s->overlay_rgba_map[G];
376  const int sb = s->overlay_rgba_map[B];
377  const int sa = s->overlay_rgba_map[A];
378  const int sstep = s->overlay_pix_step[0];
379  int slice_start, slice_end;
380  uint8_t *S, *sp, *d, *dp;
381 
382  i = FFMAX(-y, 0);
383  imax = FFMIN(-y + dst_h, src_h);
384 
385  slice_start = (imax * jobnr) / nb_jobs;
386  slice_end = (imax * (jobnr+1)) / nb_jobs;
387 
388  sp = src->data[0] + (i + slice_start) * src->linesize[0];
389  dp = dst->data[0] + (y + i + slice_start) * dst->linesize[0];
390 
391  for (i = i + slice_start; i < slice_end; i++) {
392  j = FFMAX(-x, 0);
393  S = sp + j * sstep;
394  d = dp + (x+j) * dstep;
395 
396  for (jmax = FFMIN(-x + dst_w, src_w); j < jmax; j++) {
397  alpha = S[sa];
398 
399  // if the main channel has an alpha channel, alpha has to be calculated
400  // to create an un-premultiplied (straight) alpha value
401  if (main_has_alpha && alpha != 0 && alpha != 255) {
402  uint8_t alpha_d = d[da];
403  alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d);
404  }
405 
406  switch (alpha) {
407  case 0:
408  break;
409  case 255:
410  d[dr] = S[sr];
411  d[dg] = S[sg];
412  d[db] = S[sb];
413  break;
414  default:
415  // main_value = main_value * (1 - alpha) + overlay_value * alpha
416  // since alpha is in the range 0-255, the result must divided by 255
417  d[dr] = is_straight ? FAST_DIV255(d[dr] * (255 - alpha) + S[sr] * alpha) :
418  FFMIN(FAST_DIV255(d[dr] * (255 - alpha)) + S[sr], 255);
419  d[dg] = is_straight ? FAST_DIV255(d[dg] * (255 - alpha) + S[sg] * alpha) :
420  FFMIN(FAST_DIV255(d[dg] * (255 - alpha)) + S[sg], 255);
421  d[db] = is_straight ? FAST_DIV255(d[db] * (255 - alpha) + S[sb] * alpha) :
422  FFMIN(FAST_DIV255(d[db] * (255 - alpha)) + S[sb], 255);
423  }
424  if (main_has_alpha) {
425  switch (alpha) {
426  case 0:
427  break;
428  case 255:
429  d[da] = S[sa];
430  break;
431  default:
432  // apply alpha compositing: main_alpha += (1-main_alpha) * overlay_alpha
433  d[da] += FAST_DIV255((255 - d[da]) * S[sa]);
434  }
435  }
436  d += dstep;
437  S += sstep;
438  }
439  dp += dst->linesize[0];
440  sp += src->linesize[0];
441  }
442 }
443 
445  AVFrame *dst, const AVFrame *src,
446  int src_w, int src_h,
447  int dst_w, int dst_h,
448  int i, int hsub, int vsub,
449  int x, int y,
450  int main_has_alpha,
451  int dst_plane,
452  int dst_offset,
453  int dst_step,
454  int straight,
455  int yuv,
456  int jobnr,
457  int nb_jobs)
458 {
459  OverlayContext *octx = ctx->priv;
460  int src_wp = AV_CEIL_RSHIFT(src_w, hsub);
461  int src_hp = AV_CEIL_RSHIFT(src_h, vsub);
462  int dst_wp = AV_CEIL_RSHIFT(dst_w, hsub);
463  int dst_hp = AV_CEIL_RSHIFT(dst_h, vsub);
464  int yp = y>>vsub;
465  int xp = x>>hsub;
466  uint8_t *s, *sp, *d, *dp, *dap, *a, *da, *ap;
467  int jmax, j, k, kmax;
468  int slice_start, slice_end;
469 
470  j = FFMAX(-yp, 0);
471  jmax = FFMIN(-yp + dst_hp, src_hp);
472 
473  slice_start = (jmax * jobnr) / nb_jobs;
474  slice_end = (jmax * (jobnr+1)) / nb_jobs;
475 
476  sp = src->data[i] + slice_start * src->linesize[i];
477  dp = dst->data[dst_plane]
478  + (yp + slice_start) * dst->linesize[dst_plane]
479  + dst_offset;
480  ap = src->data[3] + (slice_start << vsub) * src->linesize[3];
481  dap = dst->data[3] + ((yp + slice_start) << vsub) * dst->linesize[3];
482 
483  for (j = j + slice_start; j < slice_end; j++) {
484  k = FFMAX(-xp, 0);
485  d = dp + (xp+k) * dst_step;
486  s = sp + k;
487  a = ap + (k<<hsub);
488  da = dap + ((xp+k) << hsub);
489  kmax = FFMIN(-xp + dst_wp, src_wp);
490 
491  if (((vsub && j+1 < src_hp) || !vsub) && octx->blend_row[i]) {
492  int c = octx->blend_row[i](d, da, s, a, kmax - k, src->linesize[3]);
493 
494  s += c;
495  d += dst_step * c;
496  da += (1 << hsub) * c;
497  a += (1 << hsub) * c;
498  k += c;
499  }
500  for (; k < kmax; k++) {
501  int alpha_v, alpha_h, alpha;
502 
503  // average alpha for color components, improve quality
504  if (hsub && vsub && j+1 < src_hp && k+1 < src_wp) {
505  alpha = (a[0] + a[src->linesize[3]] +
506  a[1] + a[src->linesize[3]+1]) >> 2;
507  } else if (hsub || vsub) {
508  alpha_h = hsub && k+1 < src_wp ?
509  (a[0] + a[1]) >> 1 : a[0];
510  alpha_v = vsub && j+1 < src_hp ?
511  (a[0] + a[src->linesize[3]]) >> 1 : a[0];
512  alpha = (alpha_v + alpha_h) >> 1;
513  } else
514  alpha = a[0];
515  // if the main channel has an alpha channel, alpha has to be calculated
516  // to create an un-premultiplied (straight) alpha value
517  if (main_has_alpha && alpha != 0 && alpha != 255) {
518  // average alpha for color components, improve quality
519  uint8_t alpha_d;
520  if (hsub && vsub && j+1 < src_hp && k+1 < src_wp) {
521  alpha_d = (da[0] + da[dst->linesize[3]] +
522  da[1] + da[dst->linesize[3]+1]) >> 2;
523  } else if (hsub || vsub) {
524  alpha_h = hsub && k+1 < src_wp ?
525  (da[0] + da[1]) >> 1 : da[0];
526  alpha_v = vsub && j+1 < src_hp ?
527  (da[0] + da[dst->linesize[3]]) >> 1 : da[0];
528  alpha_d = (alpha_v + alpha_h) >> 1;
529  } else
530  alpha_d = da[0];
531  alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d);
532  }
533  if (straight) {
534  *d = FAST_DIV255(*d * (255 - alpha) + *s * alpha);
535  } else {
536  if (i && yuv)
537  *d = av_clip(FAST_DIV255((*d - 128) * (255 - alpha)) + *s - 128, -128, 128) + 128;
538  else
539  *d = FFMIN(FAST_DIV255(*d * (255 - alpha)) + *s, 255);
540  }
541  s++;
542  d += dst_step;
543  da += 1 << hsub;
544  a += 1 << hsub;
545  }
546  dp += dst->linesize[dst_plane];
547  sp += src->linesize[i];
548  ap += (1 << vsub) * src->linesize[3];
549  dap += (1 << vsub) * dst->linesize[3];
550  }
551 }
552 
553 static inline void alpha_composite(const AVFrame *src, const AVFrame *dst,
554  int src_w, int src_h,
555  int dst_w, int dst_h,
556  int x, int y,
557  int jobnr, int nb_jobs)
558 {
559  uint8_t alpha; ///< the amount of overlay to blend on to main
560  uint8_t *s, *sa, *d, *da;
561  int i, imax, j, jmax;
562  int slice_start, slice_end;
563 
564  imax = FFMIN(-y + dst_h, src_h);
565  slice_start = (imax * jobnr) / nb_jobs;
566  slice_end = ((imax * (jobnr+1)) / nb_jobs);
567 
568  i = FFMAX(-y, 0);
569  sa = src->data[3] + (i + slice_start) * src->linesize[3];
570  da = dst->data[3] + (y + i + slice_start) * dst->linesize[3];
571 
572  for (i = i + slice_start; i < slice_end; i++) {
573  j = FFMAX(-x, 0);
574  s = sa + j;
575  d = da + x+j;
576 
577  for (jmax = FFMIN(-x + dst_w, src_w); j < jmax; j++) {
578  alpha = *s;
579  if (alpha != 0 && alpha != 255) {
580  uint8_t alpha_d = *d;
581  alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d);
582  }
583  switch (alpha) {
584  case 0:
585  break;
586  case 255:
587  *d = *s;
588  break;
589  default:
590  // apply alpha compositing: main_alpha += (1-main_alpha) * overlay_alpha
591  *d += FAST_DIV255((255 - *d) * *s);
592  }
593  d += 1;
594  s += 1;
595  }
596  da += dst->linesize[3];
597  sa += src->linesize[3];
598  }
599 }
600 
602  AVFrame *dst, const AVFrame *src,
603  int hsub, int vsub,
604  int main_has_alpha,
605  int x, int y,
606  int is_straight,
607  int jobnr, int nb_jobs)
608 {
609  OverlayContext *s = ctx->priv;
610  const int src_w = src->width;
611  const int src_h = src->height;
612  const int dst_w = dst->width;
613  const int dst_h = dst->height;
614 
615  blend_plane(ctx, dst, src, src_w, src_h, dst_w, dst_h, 0, 0, 0, x, y, main_has_alpha,
616  s->main_desc->comp[0].plane, s->main_desc->comp[0].offset, s->main_desc->comp[0].step, is_straight, 1,
617  jobnr, nb_jobs);
618  blend_plane(ctx, dst, src, src_w, src_h, dst_w, dst_h, 1, hsub, vsub, x, y, main_has_alpha,
619  s->main_desc->comp[1].plane, s->main_desc->comp[1].offset, s->main_desc->comp[1].step, is_straight, 1,
620  jobnr, nb_jobs);
621  blend_plane(ctx, dst, src, src_w, src_h, dst_w, dst_h, 2, hsub, vsub, x, y, main_has_alpha,
622  s->main_desc->comp[2].plane, s->main_desc->comp[2].offset, s->main_desc->comp[2].step, is_straight, 1,
623  jobnr, nb_jobs);
624 
625  if (main_has_alpha)
626  alpha_composite(src, dst, src_w, src_h, dst_w, dst_h, x, y, jobnr, nb_jobs);
627 }
628 
630  AVFrame *dst, const AVFrame *src,
631  int hsub, int vsub,
632  int main_has_alpha,
633  int x, int y,
634  int is_straight,
635  int jobnr,
636  int nb_jobs)
637 {
638  OverlayContext *s = ctx->priv;
639  const int src_w = src->width;
640  const int src_h = src->height;
641  const int dst_w = dst->width;
642  const int dst_h = dst->height;
643 
644  blend_plane(ctx, dst, src, src_w, src_h, dst_w, dst_h, 0, 0, 0, x, y, main_has_alpha,
645  s->main_desc->comp[1].plane, s->main_desc->comp[1].offset, s->main_desc->comp[1].step, is_straight, 0,
646  jobnr, nb_jobs);
647  blend_plane(ctx, dst, src, src_w, src_h, dst_w, dst_h, 1, hsub, vsub, x, y, main_has_alpha,
648  s->main_desc->comp[2].plane, s->main_desc->comp[2].offset, s->main_desc->comp[2].step, is_straight, 0,
649  jobnr, nb_jobs);
650  blend_plane(ctx, dst, src, src_w, src_h, dst_w, dst_h, 2, hsub, vsub, x, y, main_has_alpha,
651  s->main_desc->comp[0].plane, s->main_desc->comp[0].offset, s->main_desc->comp[0].step, is_straight, 0,
652  jobnr, nb_jobs);
653 
654  if (main_has_alpha)
655  alpha_composite(src, dst, src_w, src_h, dst_w, dst_h, x, y, jobnr, nb_jobs);
656 }
657 
658 static int blend_slice_yuv420(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
659 {
660  OverlayContext *s = ctx->priv;
661  ThreadData *td = arg;
662  blend_slice_yuv(ctx, td->dst, td->src, 1, 1, 0, s->x, s->y, 1, jobnr, nb_jobs);
663  return 0;
664 }
665 
666 static int blend_slice_yuva420(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
667 {
668  OverlayContext *s = ctx->priv;
669  ThreadData *td = arg;
670  blend_slice_yuv(ctx, td->dst, td->src, 1, 1, 1, s->x, s->y, 1, jobnr, nb_jobs);
671  return 0;
672 }
673 
674 static int blend_slice_yuv422(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
675 {
676  OverlayContext *s = ctx->priv;
677  ThreadData *td = arg;
678  blend_slice_yuv(ctx, td->dst, td->src, 1, 0, 0, s->x, s->y, 1, jobnr, nb_jobs);
679  return 0;
680 }
681 
682 static int blend_slice_yuva422(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
683 {
684  OverlayContext *s = ctx->priv;
685  ThreadData *td = arg;
686  blend_slice_yuv(ctx, td->dst, td->src, 1, 0, 1, s->x, s->y, 1, jobnr, nb_jobs);
687  return 0;
688 }
689 
690 static int blend_slice_yuv444(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
691 {
692  OverlayContext *s = ctx->priv;
693  ThreadData *td = arg;
694  blend_slice_yuv(ctx, td->dst, td->src, 0, 0, 0, s->x, s->y, 1, jobnr, nb_jobs);
695  return 0;
696 }
697 
698 static int blend_slice_yuva444(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
699 {
700  OverlayContext *s = ctx->priv;
701  ThreadData *td = arg;
702  blend_slice_yuv(ctx, td->dst, td->src, 0, 0, 1, s->x, s->y, 1, jobnr, nb_jobs);
703  return 0;
704 }
705 
706 static int blend_slice_gbrp(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
707 {
708  OverlayContext *s = ctx->priv;
709  ThreadData *td = arg;
710  blend_slice_planar_rgb(ctx, td->dst, td->src, 0, 0, 0, s->x, s->y, 1, jobnr, nb_jobs);
711  return 0;
712 }
713 
714 static int blend_slice_gbrap(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
715 {
716  OverlayContext *s = ctx->priv;
717  ThreadData *td = arg;
718  blend_slice_planar_rgb(ctx, td->dst, td->src, 0, 0, 1, s->x, s->y, 1, jobnr, nb_jobs);
719  return 0;
720 }
721 
722 static int blend_slice_yuv420_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
723 {
724  OverlayContext *s = ctx->priv;
725  ThreadData *td = arg;
726  blend_slice_yuv(ctx, td->dst, td->src, 1, 1, 0, s->x, s->y, 0, jobnr, nb_jobs);
727  return 0;
728 }
729 
730 static int blend_slice_yuva420_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
731 {
732  OverlayContext *s = ctx->priv;
733  ThreadData *td = arg;
734  blend_slice_yuv(ctx, td->dst, td->src, 1, 1, 1, s->x, s->y, 0, jobnr, nb_jobs);
735  return 0;
736 }
737 
738 static int blend_slice_yuv422_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
739 {
740  OverlayContext *s = ctx->priv;
741  ThreadData *td = arg;
742  blend_slice_yuv(ctx, td->dst, td->src, 1, 0, 0, s->x, s->y, 0, jobnr, nb_jobs);
743  return 0;
744 }
745 
746 static int blend_slice_yuva422_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
747 {
748  OverlayContext *s = ctx->priv;
749  ThreadData *td = arg;
750  blend_slice_yuv(ctx, td->dst, td->src, 1, 0, 1, s->x, s->y, 0, jobnr, nb_jobs);
751  return 0;
752 }
753 
754 static int blend_slice_yuv444_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
755 {
756  OverlayContext *s = ctx->priv;
757  ThreadData *td = arg;
758  blend_slice_yuv(ctx, td->dst, td->src, 0, 0, 0, s->x, s->y, 0, jobnr, nb_jobs);
759  return 0;
760 }
761 
762 static int blend_slice_yuva444_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
763 {
764  OverlayContext *s = ctx->priv;
765  ThreadData *td = arg;
766  blend_slice_yuv(ctx, td->dst, td->src, 0, 0, 1, s->x, s->y, 0, jobnr, nb_jobs);
767  return 0;
768 }
769 
770 static int blend_slice_gbrp_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
771 {
772  OverlayContext *s = ctx->priv;
773  ThreadData *td = arg;
774  blend_slice_planar_rgb(ctx, td->dst, td->src, 0, 0, 0, s->x, s->y, 0, jobnr, nb_jobs);
775  return 0;
776 }
777 
778 static int blend_slice_gbrap_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
779 {
780  OverlayContext *s = ctx->priv;
781  ThreadData *td = arg;
782  blend_slice_planar_rgb(ctx, td->dst, td->src, 0, 0, 1, s->x, s->y, 0, jobnr, nb_jobs);
783  return 0;
784 }
785 
786 static int blend_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
787 {
788  OverlayContext *s = ctx->priv;
789  ThreadData *td = arg;
790  blend_slice_packed_rgb(ctx, td->dst, td->src, 0, s->x, s->y, 1, jobnr, nb_jobs);
791  return 0;
792 }
793 
794 static int blend_slice_rgba(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
795 {
796  OverlayContext *s = ctx->priv;
797  ThreadData *td = arg;
798  blend_slice_packed_rgb(ctx, td->dst, td->src, 1, s->x, s->y, 1, jobnr, nb_jobs);
799  return 0;
800 }
801 
802 static int blend_slice_rgb_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
803 {
804  OverlayContext *s = ctx->priv;
805  ThreadData *td = arg;
806  blend_slice_packed_rgb(ctx, td->dst, td->src, 0, s->x, s->y, 0, jobnr, nb_jobs);
807  return 0;
808 }
809 
810 static int blend_slice_rgba_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
811 {
812  OverlayContext *s = ctx->priv;
813  ThreadData *td = arg;
814  blend_slice_packed_rgb(ctx, td->dst, td->src, 1, s->x, s->y, 0, jobnr, nb_jobs);
815  return 0;
816 }
817 
818 static int config_input_main(AVFilterLink *inlink)
819 {
820  OverlayContext *s = inlink->dst->priv;
821  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
822 
824 
825  s->hsub = pix_desc->log2_chroma_w;
826  s->vsub = pix_desc->log2_chroma_h;
827 
828  s->main_desc = pix_desc;
829 
830  s->main_is_packed_rgb =
831  ff_fill_rgba_map(s->main_rgba_map, inlink->format) >= 0;
833  switch (s->format) {
836  break;
839  break;
842  break;
843  case OVERLAY_FORMAT_RGB:
845  break;
846  case OVERLAY_FORMAT_GBRP:
848  break;
849  case OVERLAY_FORMAT_AUTO:
850  switch (inlink->format) {
851  case AV_PIX_FMT_YUVA420P:
853  break;
854  case AV_PIX_FMT_YUVA422P:
856  break;
857  case AV_PIX_FMT_YUVA444P:
859  break;
860  case AV_PIX_FMT_ARGB:
861  case AV_PIX_FMT_RGBA:
862  case AV_PIX_FMT_BGRA:
863  case AV_PIX_FMT_ABGR:
865  break;
866  case AV_PIX_FMT_GBRAP:
868  break;
869  default:
870  av_assert0(0);
871  break;
872  }
873  break;
874  }
875 
876  if (!s->alpha_format)
877  goto end;
878 
879  switch (s->format) {
882  break;
885  break;
888  break;
889  case OVERLAY_FORMAT_RGB:
891  break;
892  case OVERLAY_FORMAT_GBRP:
894  break;
895  case OVERLAY_FORMAT_AUTO:
896  switch (inlink->format) {
897  case AV_PIX_FMT_YUVA420P:
899  break;
900  case AV_PIX_FMT_YUVA422P:
902  break;
903  case AV_PIX_FMT_YUVA444P:
905  break;
906  case AV_PIX_FMT_ARGB:
907  case AV_PIX_FMT_RGBA:
908  case AV_PIX_FMT_BGRA:
909  case AV_PIX_FMT_ABGR:
911  break;
912  case AV_PIX_FMT_GBRAP:
914  break;
915  default:
916  av_assert0(0);
917  break;
918  }
919  break;
920  }
921 
922 end:
923  if (ARCH_X86)
924  ff_overlay_init_x86(s, s->format, inlink->format,
926 
927  return 0;
928 }
929 
930 static int do_blend(FFFrameSync *fs)
931 {
932  AVFilterContext *ctx = fs->parent;
933  AVFrame *mainpic, *second;
934  OverlayContext *s = ctx->priv;
935  AVFilterLink *inlink = ctx->inputs[0];
936  int ret;
937 
938  ret = ff_framesync_dualinput_get_writable(fs, &mainpic, &second);
939  if (ret < 0)
940  return ret;
941  if (!second)
942  return ff_filter_frame(ctx->outputs[0], mainpic);
943 
944  if (s->eval_mode == EVAL_MODE_FRAME) {
945  int64_t pos = mainpic->pkt_pos;
946 
947  s->var_values[VAR_N] = inlink->frame_count_out;
948  s->var_values[VAR_T] = mainpic->pts == AV_NOPTS_VALUE ?
949  NAN : mainpic->pts * av_q2d(inlink->time_base);
950  s->var_values[VAR_POS] = pos == -1 ? NAN : pos;
951 
952  s->var_values[VAR_OVERLAY_W] = s->var_values[VAR_OW] = second->width;
953  s->var_values[VAR_OVERLAY_H] = s->var_values[VAR_OH] = second->height;
954  s->var_values[VAR_MAIN_W ] = s->var_values[VAR_MW] = mainpic->width;
955  s->var_values[VAR_MAIN_H ] = s->var_values[VAR_MH] = mainpic->height;
956 
957  eval_expr(ctx);
958  av_log(ctx, AV_LOG_DEBUG, "n:%f t:%f pos:%f x:%f xi:%d y:%f yi:%d\n",
960  s->var_values[VAR_X], s->x,
961  s->var_values[VAR_Y], s->y);
962  }
963 
964  if (s->x < mainpic->width && s->x + second->width >= 0 ||
965  s->y < mainpic->height && s->y + second->height >= 0) {
966  ThreadData td;
967 
968  td.dst = mainpic;
969  td.src = second;
970  ctx->internal->execute(ctx, s->blend_slice, &td, NULL, FFMIN(FFMIN(mainpic->height - s->y, second->height),
972  }
973  return ff_filter_frame(ctx->outputs[0], mainpic);
974 }
975 
977 {
978  OverlayContext *s = ctx->priv;
979 
980  s->fs.on_event = do_blend;
981  return 0;
982 }
983 
985 {
986  OverlayContext *s = ctx->priv;
987  return ff_framesync_activate(&s->fs);
988 }
989 
990 #define OFFSET(x) offsetof(OverlayContext, x)
991 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
992 
993 static const AVOption overlay_options[] = {
994  { "x", "set the x expression", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX, FLAGS },
995  { "y", "set the y expression", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX, FLAGS },
996  { "eof_action", "Action to take when encountering EOF from secondary input ",
997  OFFSET(fs.opt_eof_action), AV_OPT_TYPE_INT, { .i64 = EOF_ACTION_REPEAT },
998  EOF_ACTION_REPEAT, EOF_ACTION_PASS, .flags = FLAGS, "eof_action" },
999  { "repeat", "Repeat the previous frame.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_REPEAT }, .flags = FLAGS, "eof_action" },
1000  { "endall", "End both streams.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_ENDALL }, .flags = FLAGS, "eof_action" },
1001  { "pass", "Pass through the main input.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_PASS }, .flags = FLAGS, "eof_action" },
1002  { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_FRAME}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
1003  { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
1004  { "frame", "eval expressions per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
1005  { "shortest", "force termination when the shortest input terminates", OFFSET(fs.opt_shortest), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
1006  { "format", "set output format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=OVERLAY_FORMAT_YUV420}, 0, OVERLAY_FORMAT_NB-1, FLAGS, "format" },
1007  { "yuv420", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV420}, .flags = FLAGS, .unit = "format" },
1008  { "yuv422", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV422}, .flags = FLAGS, .unit = "format" },
1009  { "yuv444", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV444}, .flags = FLAGS, .unit = "format" },
1010  { "rgb", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_RGB}, .flags = FLAGS, .unit = "format" },
1011  { "gbrp", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_GBRP}, .flags = FLAGS, .unit = "format" },
1012  { "auto", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_AUTO}, .flags = FLAGS, .unit = "format" },
1013  { "repeatlast", "repeat overlay of the last overlay frame", OFFSET(fs.opt_repeatlast), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
1014  { "alpha", "alpha format", OFFSET(alpha_format), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "alpha_format" },
1015  { "straight", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, .flags = FLAGS, .unit = "alpha_format" },
1016  { "premultiplied", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, .flags = FLAGS, .unit = "alpha_format" },
1017  { NULL }
1018 };
1019 
1021 
1023  {
1024  .name = "main",
1025  .type = AVMEDIA_TYPE_VIDEO,
1026  .config_props = config_input_main,
1027  },
1028  {
1029  .name = "overlay",
1030  .type = AVMEDIA_TYPE_VIDEO,
1031  .config_props = config_input_overlay,
1032  },
1033  { NULL }
1034 };
1035 
1037  {
1038  .name = "default",
1039  .type = AVMEDIA_TYPE_VIDEO,
1040  .config_props = config_output,
1041  },
1042  { NULL }
1043 };
1044 
1046  .name = "overlay",
1047  .description = NULL_IF_CONFIG_SMALL("Overlay a video source on top of the input."),
1048  .preinit = overlay_framesync_preinit,
1049  .init = init,
1050  .uninit = uninit,
1051  .priv_size = sizeof(OverlayContext),
1052  .priv_class = &overlay_class,
1054  .activate = activate,
1056  .inputs = avfilter_vf_overlay_inputs,
1057  .outputs = avfilter_vf_overlay_outputs,
1060 };
static int activate(AVFilterContext *ctx)
Definition: vf_overlay.c:984
int plane
Which of the 4 planes contains the component.
Definition: pixdesc.h:35
#define NULL
Definition: coverity.c:32
static const char * format[]
Definition: af_aiir.c:330
static float alpha(float a)
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2384
static int blend_slice_rgb_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:802
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
AVOption.
Definition: opt.h:246
int64_t pkt_pos
reordered pos from the last AVPacket that has been input into the decoder
Definition: frame.h:490
Definition: aeval.c:48
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:67
misc image utilities
Main libavfilter public API header.
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:64
int(* on_event)(struct FFFrameSync *fs)
Callback called when a frame event is ready.
Definition: framesync.h:172
const AVPixFmtDescriptor * main_desc
format descriptor for main input
Definition: vf_overlay.h:71
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:164
static void alpha_composite(const AVFrame *src, const AVFrame *dst, int src_w, int src_h, int dst_w, int dst_h, int x, int y, int jobnr, int nb_jobs)
Definition: vf_overlay.c:553
static int blend_slice_yuv444_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:754
static const AVFilterPad avfilter_vf_overlay_inputs[]
Definition: vf_overlay.c:1022
void ff_overlay_init_x86(OverlayContext *s, int format, int pix_format, int alpha_format, int main_has_alpha)
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:117
static int blend_slice_rgba_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:810
int av_expr_parse(AVExpr **expr, const char *s, const char *const *const_names, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), int log_offset, void *log_ctx)
Parse an expression.
Definition: eval.c:679
#define src
Definition: vp8dsp.c:254
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
static int blend_slice_yuva420_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:730
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
static int blend_slice_gbrp(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:706
static int blend_slice_yuv420(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:658
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
const char * name
Pad name.
Definition: internal.h:60
AVFilterContext * parent
Parent filter context.
Definition: framesync.h:152
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
static int blend_slice_yuv422(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:674
char * x_expr
Definition: vf_overlay.h:74
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:97
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
#define av_cold
Definition: attributes.h:82
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:259
AVOptions.
timestamp utils, mostly useful for debugging/logging purposes
static const char *const var_names[]
Definition: vf_overlay.c:48
int ff_framesync_init_dualinput(FFFrameSync *fs, AVFilterContext *parent)
Initialize a frame sync structure for dualinput.
Definition: framesync.c:361
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
#define G
Definition: vf_overlay.c:67
double var_values[VAR_VARS_NB]
Definition: vf_overlay.h:73
static int blend_slice_yuva444(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:698
int ff_framesync_dualinput_get_writable(FFFrameSync *fs, AVFrame **f0, AVFrame **f1)
Same as ff_framesync_dualinput_get(), but make sure that f0 is writable.
Definition: framesync.c:399
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:311
Definition: eval.c:157
#define R
Definition: vf_overlay.c:66
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:90
#define FAST_DIV255(x)
Definition: vf_overlay.c:345
uint8_t overlay_rgba_map[4]
Definition: vf_overlay.h:60
static av_always_inline void blend_plane(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int src_w, int src_h, int dst_w, int dst_h, int i, int hsub, int vsub, int x, int y, int main_has_alpha, int dst_plane, int dst_offset, int dst_step, int straight, int yuv, int jobnr, int nb_jobs)
Definition: vf_overlay.c:444
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:75
AVExpr * y_pexpr
Definition: vf_overlay.h:76
#define sp
Definition: regdef.h:63
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
Definition: vf_blend.c:51
#define OVERLAY
Definition: vf_overlay.c:64
#define flags(name, subs,...)
Definition: cbs_h2645.c:263
int ff_fmt_is_in(int fmt, const int *fmts)
Tell if an integer is contained in the provided -1-terminated list of integers.
Definition: formats.c:254
#define av_log(a,...)
static int blend_slice_yuv444(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:690
A filter pad used for either input or output.
Definition: internal.h:54
int eval_mode
EvalMode.
Definition: vf_overlay.h:64
int format
OverlayFormat.
Definition: vf_overlay.h:62
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:172
int width
Definition: frame.h:276
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:568
#define td
Definition: regdef.h:70
#define UNPREMULTIPLY_ALPHA(x, y)
Definition: vf_overlay.c:351
static av_always_inline void blend_slice_yuv(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int hsub, int vsub, int main_has_alpha, int x, int y, int is_straight, int jobnr, int nb_jobs)
Definition: vf_overlay.c:601
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
void ff_framesync_uninit(FFFrameSync *fs)
Free all memory currently allocated.
Definition: framesync.c:293
static int blend_slice_gbrap_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:778
static int blend_slice_yuva422_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:746
#define S(s, c, i)
Frame sync structure.
Definition: framesync.h:146
int(* blend_row[4])(uint8_t *d, uint8_t *da, uint8_t *s, uint8_t *a, int w, ptrdiff_t alinesize)
Definition: vf_overlay.h:78
AVFrame * src
Definition: vf_overlay.c:45
#define AVERROR(e)
Definition: error.h:43
uint8_t main_has_alpha
Definition: vf_overlay.h:58
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:91
Definition: vf_blend.c:51
void * priv
private data for use by the filter
Definition: avfilter.h:353
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:116
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
const char * arg
Definition: jacosubdec.c:66
planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for the UV components, which are interleaved (firs...
Definition: pixfmt.h:85
static int config_input_overlay(AVFilterLink *inlink)
Definition: vf_overlay.c:280
static int blend_slice_yuva444_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:762
int ff_framesync_activate(FFFrameSync *fs)
Examine the frames in the filter's input and try to produce output.
Definition: framesync.c:344
#define FFMAX(a, b)
Definition: common.h:94
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:88
#define fail()
Definition: checkasm.h:117
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:89
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:66
Definition: scale.c:56
as above, but U and V bytes are swapped
Definition: pixfmt.h:86
static const AVFilterPad avfilter_vf_overlay_outputs[]
Definition: vf_overlay.c:1036
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:802
#define NAN
Definition: mathematics.h:64
#define FFMIN(a, b)
Definition: common.h:96
static int blend_slice_yuva422(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:682
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:74
Definition: scale.c:52
uint8_t main_rgba_map[4]
Definition: vf_overlay.h:57
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:440
AVFormatContext * ctx
Definition: movenc.c:48
Definition: aeval.c:51
#define s(width, name)
Definition: cbs_vp9.c:257
#define B
Definition: vf_overlay.c:68
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
static av_cold int init(AVFilterContext *ctx)
Definition: vf_overlay.c:976
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
int main_pix_step[4]
steps per pixel for each plane of the main output
Definition: vf_overlay.h:68
EvalMode
Definition: af_volume.h:39
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
static int blend_slice_yuv422_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:738
int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
Definition: drawutils.c:35
char * y_expr
Definition: vf_overlay.h:74
static const AVOption overlay_options[]
Definition: vf_overlay.c:993
AVFrame * dst
Definition: vf_blend.c:55
static int blend_slice_rgba(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:794
static int blend_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:786
static int blend_slice_gbrp_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:770
misc drawing utilities
static av_always_inline void blend_slice_packed_rgb(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int main_has_alpha, int x, int y, int is_straight, int jobnr, int nb_jobs)
Blend image in src to destination buffer dst at position (x, y).
Definition: vf_overlay.c:357
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:334
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_overlay.c:81
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:249
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:173
static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx)
Definition: vf_overlay.c:109
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
static int blend_slice_yuv420_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:722
AVExpr * x_pexpr
Definition: vf_overlay.h:76
#define OFFSET(x)
Definition: vf_overlay.c:990
int y
position of overlaid picture
Definition: vf_overlay.h:54
static int blend_slice_yuva420(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:666
Filter definition.
Definition: avfilter.h:144
uint8_t overlay_has_alpha
Definition: vf_overlay.h:61
#define FLAGS
Definition: vf_overlay.c:991
option
Definition: libkvazaar.c:282
#define isnan(x)
Definition: libm.h:340
uint8_t overlay_is_packed_rgb
Definition: vf_overlay.h:59
#define A
Definition: vf_overlay.c:69
const char * name
Filter name.
Definition: avfilter.h:148
static av_always_inline void blend_slice_planar_rgb(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int hsub, int vsub, int main_has_alpha, int x, int y, int is_straight, int jobnr, int nb_jobs)
Definition: vf_overlay.c:629
static int query_formats(AVFilterContext *ctx)
Definition: vf_overlay.c:161
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
Definition: avfilter.h:133
int overlay_pix_step[4]
steps per pixel for each plane of the overlay
Definition: vf_overlay.h:69
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
int offset
Number of elements before the component of the first pixel.
Definition: pixdesc.h:47
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:378
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
int(* blend_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.h:80
static int normalize_xy(double d, int chroma_sub)
Definition: vf_overlay.c:90
static int config_input_main(AVFilterLink *inlink)
Definition: vf_overlay.c:818
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
Definition: scale.c:51
common internal and external API header
static int blend_slice_gbrap(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_overlay.c:714
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:211
static double c[64]
int vsub
chroma subsampling values
Definition: vf_overlay.h:70
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:76
AVFilter ff_vf_overlay
Definition: vf_overlay.c:1045
avfilter_execute_func * execute
Definition: internal.h:155
const AVFrame * src
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2029
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:734
static int config_output(AVFilterLink *outlink)
Definition: vf_overlay.c:327
A list of supported formats for one end of a filter link.
Definition: formats.h:64
uint8_t main_is_packed_rgb
Definition: vf_overlay.h:56
An instance of a filter.
Definition: avfilter.h:338
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_overlay.c:130
FFFrameSync fs
Definition: vf_overlay.h:66
int height
Definition: frame.h:276
Definition: scale.c:57
FRAMESYNC_DEFINE_CLASS(overlay, OverlayContext, fs)
#define MAIN
Definition: vf_overlay.c:63
#define av_freep(p)
#define av_always_inline
Definition: attributes.h:39
static void eval_expr(AVFilterContext *ctx)
Definition: vf_overlay.c:97
static int do_blend(FFFrameSync *fs)
Definition: vf_overlay.c:930
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2300
internal API functions
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
static enum AVPixelFormat alpha_pix_fmts[]
Definition: vf_overlay.c:155
int step
Number of elements between 2 horizontally consecutive pixels.
Definition: pixdesc.h:41
simple arithmetic expression evaluator
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
int * formats
list of media formats
Definition: formats.h:66