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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 
43 static const char *const var_names[] = {
44  "main_w", "W", ///< width of the main video
45  "main_h", "H", ///< height of the main video
46  "overlay_w", "w", ///< width of the overlay video
47  "overlay_h", "h", ///< height of the overlay video
48  "hsub",
49  "vsub",
50  "x",
51  "y",
52  "n", ///< number of frame
53  "pos", ///< position in the file
54  "t", ///< timestamp expressed in seconds
55  NULL
56 };
57 
58 enum var_name {
71 };
72 
73 #define MAIN 0
74 #define OVERLAY 1
75 
76 #define R 0
77 #define G 1
78 #define B 2
79 #define A 3
80 
81 #define Y 0
82 #define U 1
83 #define V 2
84 
85 enum EvalMode {
89 };
90 
99 };
100 
101 typedef struct OverlayContext {
102  const AVClass *class;
103  int x, y; ///< position of overlaid picture
104 
111  int format; ///< OverlayFormat
113  int eval_mode; ///< EvalMode
114 
116 
117  int main_pix_step[4]; ///< steps per pixel for each plane of the main output
118  int overlay_pix_step[4]; ///< steps per pixel for each plane of the overlay
119  int hsub, vsub; ///< chroma subsampling values
120  const AVPixFmtDescriptor *main_desc; ///< format descriptor for main input
121 
123  char *x_expr, *y_expr;
124 
126 
127  void (*blend_image)(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y);
129 
131 {
132  OverlayContext *s = ctx->priv;
133 
134  ff_framesync_uninit(&s->fs);
135  av_expr_free(s->x_pexpr); s->x_pexpr = NULL;
136  av_expr_free(s->y_pexpr); s->y_pexpr = NULL;
137 }
138 
139 static inline int normalize_xy(double d, int chroma_sub)
140 {
141  if (isnan(d))
142  return INT_MAX;
143  return (int)d & ~((1 << chroma_sub) - 1);
144 }
145 
147 {
148  OverlayContext *s = ctx->priv;
149 
152  /* It is necessary if x is expressed from y */
154  s->x = normalize_xy(s->var_values[VAR_X], s->hsub);
155  s->y = normalize_xy(s->var_values[VAR_Y], s->vsub);
156 }
157 
158 static int set_expr(AVExpr **pexpr, const char *expr, const char *option, void *log_ctx)
159 {
160  int ret;
161  AVExpr *old = NULL;
162 
163  if (*pexpr)
164  old = *pexpr;
165  ret = av_expr_parse(pexpr, expr, var_names,
166  NULL, NULL, NULL, NULL, 0, log_ctx);
167  if (ret < 0) {
168  av_log(log_ctx, AV_LOG_ERROR,
169  "Error when evaluating the expression '%s' for %s\n",
170  expr, option);
171  *pexpr = old;
172  return ret;
173  }
174 
175  av_expr_free(old);
176  return 0;
177 }
178 
179 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
180  char *res, int res_len, int flags)
181 {
182  OverlayContext *s = ctx->priv;
183  int ret;
184 
185  if (!strcmp(cmd, "x"))
186  ret = set_expr(&s->x_pexpr, args, cmd, ctx);
187  else if (!strcmp(cmd, "y"))
188  ret = set_expr(&s->y_pexpr, args, cmd, ctx);
189  else
190  ret = AVERROR(ENOSYS);
191 
192  if (ret < 0)
193  return ret;
194 
195  if (s->eval_mode == EVAL_MODE_INIT) {
196  eval_expr(ctx);
197  av_log(ctx, AV_LOG_VERBOSE, "x:%f xi:%d y:%f yi:%d\n",
198  s->var_values[VAR_X], s->x,
199  s->var_values[VAR_Y], s->y);
200  }
201  return ret;
202 }
203 
204 static const enum AVPixelFormat alpha_pix_fmts[] = {
208 };
209 
211 {
212  OverlayContext *s = ctx->priv;
213 
214  /* overlay formats contains alpha, for avoiding conversion with alpha information loss */
215  static const enum AVPixelFormat main_pix_fmts_yuv420[] = {
219  };
220  static const enum AVPixelFormat overlay_pix_fmts_yuv420[] = {
222  };
223 
224  static const enum AVPixelFormat main_pix_fmts_yuv422[] = {
226  };
227  static const enum AVPixelFormat overlay_pix_fmts_yuv422[] = {
229  };
230 
231  static const enum AVPixelFormat main_pix_fmts_yuv444[] = {
233  };
234  static const enum AVPixelFormat overlay_pix_fmts_yuv444[] = {
236  };
237 
238  static const enum AVPixelFormat main_pix_fmts_gbrp[] = {
240  };
241  static const enum AVPixelFormat overlay_pix_fmts_gbrp[] = {
243  };
244 
245  static const enum AVPixelFormat main_pix_fmts_rgb[] = {
250  };
251  static const enum AVPixelFormat overlay_pix_fmts_rgb[] = {
255  };
256 
257  AVFilterFormats *main_formats = NULL;
258  AVFilterFormats *overlay_formats = NULL;
259  int ret;
260 
261  switch (s->format) {
263  if (!(main_formats = ff_make_format_list(main_pix_fmts_yuv420)) ||
264  !(overlay_formats = ff_make_format_list(overlay_pix_fmts_yuv420))) {
265  ret = AVERROR(ENOMEM);
266  goto fail;
267  }
268  break;
270  if (!(main_formats = ff_make_format_list(main_pix_fmts_yuv422)) ||
271  !(overlay_formats = ff_make_format_list(overlay_pix_fmts_yuv422))) {
272  ret = AVERROR(ENOMEM);
273  goto fail;
274  }
275  break;
277  if (!(main_formats = ff_make_format_list(main_pix_fmts_yuv444)) ||
278  !(overlay_formats = ff_make_format_list(overlay_pix_fmts_yuv444))) {
279  ret = AVERROR(ENOMEM);
280  goto fail;
281  }
282  break;
283  case OVERLAY_FORMAT_RGB:
284  if (!(main_formats = ff_make_format_list(main_pix_fmts_rgb)) ||
285  !(overlay_formats = ff_make_format_list(overlay_pix_fmts_rgb))) {
286  ret = AVERROR(ENOMEM);
287  goto fail;
288  }
289  break;
290  case OVERLAY_FORMAT_GBRP:
291  if (!(main_formats = ff_make_format_list(main_pix_fmts_gbrp)) ||
292  !(overlay_formats = ff_make_format_list(overlay_pix_fmts_gbrp))) {
293  ret = AVERROR(ENOMEM);
294  goto fail;
295  }
296  break;
297  case OVERLAY_FORMAT_AUTO:
298  if (!(main_formats = ff_make_format_list(alpha_pix_fmts))) {
299  ret = AVERROR(ENOMEM);
300  goto fail;
301  }
302  break;
303  default:
304  av_assert0(0);
305  }
306 
307  if (s->format == OVERLAY_FORMAT_AUTO) {
308  ret = ff_set_common_formats(ctx, main_formats);
309  if (ret < 0)
310  goto fail;
311  } else {
312  if ((ret = ff_formats_ref(main_formats , &ctx->inputs[MAIN]->out_formats )) < 0 ||
313  (ret = ff_formats_ref(overlay_formats, &ctx->inputs[OVERLAY]->out_formats)) < 0 ||
314  (ret = ff_formats_ref(main_formats , &ctx->outputs[MAIN]->in_formats )) < 0)
315  goto fail;
316  }
317 
318  return 0;
319 fail:
320  if (main_formats)
321  av_freep(&main_formats->formats);
322  av_freep(&main_formats);
323  if (overlay_formats)
324  av_freep(&overlay_formats->formats);
325  av_freep(&overlay_formats);
326  return ret;
327 }
328 
330 {
331  AVFilterContext *ctx = inlink->dst;
332  OverlayContext *s = inlink->dst->priv;
333  int ret;
334  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
335 
337 
338  /* Finish the configuration by evaluating the expressions
339  now when both inputs are configured. */
340  s->var_values[VAR_MAIN_W ] = s->var_values[VAR_MW] = ctx->inputs[MAIN ]->w;
341  s->var_values[VAR_MAIN_H ] = s->var_values[VAR_MH] = ctx->inputs[MAIN ]->h;
344  s->var_values[VAR_HSUB] = 1<<pix_desc->log2_chroma_w;
345  s->var_values[VAR_VSUB] = 1<<pix_desc->log2_chroma_h;
346  s->var_values[VAR_X] = NAN;
347  s->var_values[VAR_Y] = NAN;
348  s->var_values[VAR_N] = 0;
349  s->var_values[VAR_T] = NAN;
350  s->var_values[VAR_POS] = NAN;
351 
352  if ((ret = set_expr(&s->x_pexpr, s->x_expr, "x", ctx)) < 0 ||
353  (ret = set_expr(&s->y_pexpr, s->y_expr, "y", ctx)) < 0)
354  return ret;
355 
357  ff_fill_rgba_map(s->overlay_rgba_map, inlink->format) >= 0;
359 
360  if (s->eval_mode == EVAL_MODE_INIT) {
361  eval_expr(ctx);
362  av_log(ctx, AV_LOG_VERBOSE, "x:%f xi:%d y:%f yi:%d\n",
363  s->var_values[VAR_X], s->x,
364  s->var_values[VAR_Y], s->y);
365  }
366 
367  av_log(ctx, AV_LOG_VERBOSE,
368  "main w:%d h:%d fmt:%s overlay w:%d h:%d fmt:%s\n",
369  ctx->inputs[MAIN]->w, ctx->inputs[MAIN]->h,
371  ctx->inputs[OVERLAY]->w, ctx->inputs[OVERLAY]->h,
373  return 0;
374 }
375 
376 static int config_output(AVFilterLink *outlink)
377 {
378  AVFilterContext *ctx = outlink->src;
379  OverlayContext *s = ctx->priv;
380  int ret;
381 
382  if ((ret = ff_framesync_init_dualinput(&s->fs, ctx)) < 0)
383  return ret;
384 
385  outlink->w = ctx->inputs[MAIN]->w;
386  outlink->h = ctx->inputs[MAIN]->h;
387  outlink->time_base = ctx->inputs[MAIN]->time_base;
388 
389  return ff_framesync_configure(&s->fs);
390 }
391 
392 // divide by 255 and round to nearest
393 // apply a fast variant: (X+127)/255 = ((X+127)*257+257)>>16 = ((X+128)*257)>>16
394 #define FAST_DIV255(x) ((((x) + 128) * 257) >> 16)
395 
396 // calculate the unpremultiplied alpha, applying the general equation:
397 // alpha = alpha_overlay / ( (alpha_main + alpha_overlay) - (alpha_main * alpha_overlay) )
398 // (((x) << 16) - ((x) << 9) + (x)) is a faster version of: 255 * 255 * x
399 // ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)) is a faster version of: 255 * (x + y)
400 #define UNPREMULTIPLY_ALPHA(x, y) ((((x) << 16) - ((x) << 9) + (x)) / ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)))
401 
402 /**
403  * Blend image in src to destination buffer dst at position (x, y).
404  */
405 
407  AVFrame *dst, const AVFrame *src,
408  int main_has_alpha, int x, int y,
409  int is_straight)
410 {
411  OverlayContext *s = ctx->priv;
412  int i, imax, j, jmax;
413  const int src_w = src->width;
414  const int src_h = src->height;
415  const int dst_w = dst->width;
416  const int dst_h = dst->height;
417  uint8_t alpha; ///< the amount of overlay to blend on to main
418  const int dr = s->main_rgba_map[R];
419  const int dg = s->main_rgba_map[G];
420  const int db = s->main_rgba_map[B];
421  const int da = s->main_rgba_map[A];
422  const int dstep = s->main_pix_step[0];
423  const int sr = s->overlay_rgba_map[R];
424  const int sg = s->overlay_rgba_map[G];
425  const int sb = s->overlay_rgba_map[B];
426  const int sa = s->overlay_rgba_map[A];
427  const int sstep = s->overlay_pix_step[0];
428  uint8_t *S, *sp, *d, *dp;
429 
430  i = FFMAX(-y, 0);
431  sp = src->data[0] + i * src->linesize[0];
432  dp = dst->data[0] + (y+i) * dst->linesize[0];
433 
434  for (imax = FFMIN(-y + dst_h, src_h); i < imax; i++) {
435  j = FFMAX(-x, 0);
436  S = sp + j * sstep;
437  d = dp + (x+j) * dstep;
438 
439  for (jmax = FFMIN(-x + dst_w, src_w); j < jmax; j++) {
440  alpha = S[sa];
441 
442  // if the main channel has an alpha channel, alpha has to be calculated
443  // to create an un-premultiplied (straight) alpha value
444  if (main_has_alpha && alpha != 0 && alpha != 255) {
445  uint8_t alpha_d = d[da];
446  alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d);
447  }
448 
449  switch (alpha) {
450  case 0:
451  break;
452  case 255:
453  d[dr] = S[sr];
454  d[dg] = S[sg];
455  d[db] = S[sb];
456  break;
457  default:
458  // main_value = main_value * (1 - alpha) + overlay_value * alpha
459  // since alpha is in the range 0-255, the result must divided by 255
460  d[dr] = is_straight ? FAST_DIV255(d[dr] * (255 - alpha) + S[sr] * alpha) :
461  FFMIN(FAST_DIV255(d[dr] * (255 - alpha)) + S[sr], 255);
462  d[dg] = is_straight ? FAST_DIV255(d[dg] * (255 - alpha) + S[sg] * alpha) :
463  FFMIN(FAST_DIV255(d[dg] * (255 - alpha)) + S[sg], 255);
464  d[db] = is_straight ? FAST_DIV255(d[db] * (255 - alpha) + S[sb] * alpha) :
465  FFMIN(FAST_DIV255(d[db] * (255 - alpha)) + S[sb], 255);
466  }
467  if (main_has_alpha) {
468  switch (alpha) {
469  case 0:
470  break;
471  case 255:
472  d[da] = S[sa];
473  break;
474  default:
475  // apply alpha compositing: main_alpha += (1-main_alpha) * overlay_alpha
476  d[da] += FAST_DIV255((255 - d[da]) * S[sa]);
477  }
478  }
479  d += dstep;
480  S += sstep;
481  }
482  dp += dst->linesize[0];
483  sp += src->linesize[0];
484  }
485 }
486 
488  AVFrame *dst, const AVFrame *src,
489  int src_w, int src_h,
490  int dst_w, int dst_h,
491  int i, int hsub, int vsub,
492  int x, int y,
493  int main_has_alpha,
494  int dst_plane,
495  int dst_offset,
496  int dst_step,
497  int straight,
498  int yuv)
499 {
500  int src_wp = AV_CEIL_RSHIFT(src_w, hsub);
501  int src_hp = AV_CEIL_RSHIFT(src_h, vsub);
502  int dst_wp = AV_CEIL_RSHIFT(dst_w, hsub);
503  int dst_hp = AV_CEIL_RSHIFT(dst_h, vsub);
504  int yp = y>>vsub;
505  int xp = x>>hsub;
506  uint8_t *s, *sp, *d, *dp, *dap, *a, *da, *ap;
507  int jmax, j, k, kmax;
508 
509  j = FFMAX(-yp, 0);
510  sp = src->data[i] + j * src->linesize[i];
511  dp = dst->data[dst_plane]
512  + (yp+j) * dst->linesize[dst_plane]
513  + dst_offset;
514  ap = src->data[3] + (j<<vsub) * src->linesize[3];
515  dap = dst->data[3] + ((yp+j) << vsub) * dst->linesize[3];
516 
517  for (jmax = FFMIN(-yp + dst_hp, src_hp); j < jmax; j++) {
518  k = FFMAX(-xp, 0);
519  d = dp + (xp+k) * dst_step;
520  s = sp + k;
521  a = ap + (k<<hsub);
522  da = dap + ((xp+k) << hsub);
523 
524  for (kmax = FFMIN(-xp + dst_wp, src_wp); k < kmax; k++) {
525  int alpha_v, alpha_h, alpha;
526 
527  // average alpha for color components, improve quality
528  if (hsub && vsub && j+1 < src_hp && k+1 < src_wp) {
529  alpha = (a[0] + a[src->linesize[3]] +
530  a[1] + a[src->linesize[3]+1]) >> 2;
531  } else if (hsub || vsub) {
532  alpha_h = hsub && k+1 < src_wp ?
533  (a[0] + a[1]) >> 1 : a[0];
534  alpha_v = vsub && j+1 < src_hp ?
535  (a[0] + a[src->linesize[3]]) >> 1 : a[0];
536  alpha = (alpha_v + alpha_h) >> 1;
537  } else
538  alpha = a[0];
539  // if the main channel has an alpha channel, alpha has to be calculated
540  // to create an un-premultiplied (straight) alpha value
541  if (main_has_alpha && alpha != 0 && alpha != 255) {
542  // average alpha for color components, improve quality
543  uint8_t alpha_d;
544  if (hsub && vsub && j+1 < src_hp && k+1 < src_wp) {
545  alpha_d = (da[0] + da[dst->linesize[3]] +
546  da[1] + da[dst->linesize[3]+1]) >> 2;
547  } else if (hsub || vsub) {
548  alpha_h = hsub && k+1 < src_wp ?
549  (da[0] + da[1]) >> 1 : da[0];
550  alpha_v = vsub && j+1 < src_hp ?
551  (da[0] + da[dst->linesize[3]]) >> 1 : da[0];
552  alpha_d = (alpha_v + alpha_h) >> 1;
553  } else
554  alpha_d = da[0];
555  alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d);
556  }
557  if (straight) {
558  *d = FAST_DIV255(*d * (255 - alpha) + *s * alpha);
559  } else {
560  if (i && yuv)
561  *d = av_clip(FAST_DIV255((*d - 128) * (255 - alpha)) + *s - 128, -128, 128) + 128;
562  else
563  *d = FFMIN(FAST_DIV255(*d * (255 - alpha)) + *s, 255);
564  }
565  s++;
566  d += dst_step;
567  da += 1 << hsub;
568  a += 1 << hsub;
569  }
570  dp += dst->linesize[dst_plane];
571  sp += src->linesize[i];
572  ap += (1 << vsub) * src->linesize[3];
573  dap += (1 << vsub) * dst->linesize[3];
574  }
575 }
576 
577 static inline void alpha_composite(const AVFrame *src, const AVFrame *dst,
578  int src_w, int src_h,
579  int dst_w, int dst_h,
580  int x, int y)
581 {
582  uint8_t alpha; ///< the amount of overlay to blend on to main
583  uint8_t *s, *sa, *d, *da;
584  int i, imax, j, jmax;
585 
586  i = FFMAX(-y, 0);
587  sa = src->data[3] + i * src->linesize[3];
588  da = dst->data[3] + (y+i) * dst->linesize[3];
589 
590  for (imax = FFMIN(-y + dst_h, src_h); i < imax; i++) {
591  j = FFMAX(-x, 0);
592  s = sa + j;
593  d = da + x+j;
594 
595  for (jmax = FFMIN(-x + dst_w, src_w); j < jmax; j++) {
596  alpha = *s;
597  if (alpha != 0 && alpha != 255) {
598  uint8_t alpha_d = *d;
599  alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d);
600  }
601  switch (alpha) {
602  case 0:
603  break;
604  case 255:
605  *d = *s;
606  break;
607  default:
608  // apply alpha compositing: main_alpha += (1-main_alpha) * overlay_alpha
609  *d += FAST_DIV255((255 - *d) * *s);
610  }
611  d += 1;
612  s += 1;
613  }
614  da += dst->linesize[3];
615  sa += src->linesize[3];
616  }
617 }
618 
620  AVFrame *dst, const AVFrame *src,
621  int hsub, int vsub,
622  int main_has_alpha,
623  int x, int y,
624  int is_straight)
625 {
626  OverlayContext *s = ctx->priv;
627  const int src_w = src->width;
628  const int src_h = src->height;
629  const int dst_w = dst->width;
630  const int dst_h = dst->height;
631 
632  blend_plane(ctx, dst, src, src_w, src_h, dst_w, dst_h, 0, 0, 0, x, y, main_has_alpha,
633  s->main_desc->comp[0].plane, s->main_desc->comp[0].offset, s->main_desc->comp[0].step, is_straight, 1);
634  blend_plane(ctx, dst, src, src_w, src_h, dst_w, dst_h, 1, hsub, vsub, x, y, main_has_alpha,
635  s->main_desc->comp[1].plane, s->main_desc->comp[1].offset, s->main_desc->comp[1].step, is_straight, 1);
636  blend_plane(ctx, dst, src, src_w, src_h, dst_w, dst_h, 2, hsub, vsub, x, y, main_has_alpha,
637  s->main_desc->comp[2].plane, s->main_desc->comp[2].offset, s->main_desc->comp[2].step, is_straight, 1);
638 
639  if (main_has_alpha)
640  alpha_composite(src, dst, src_w, src_h, dst_w, dst_h, x, y);
641 }
642 
644  AVFrame *dst, const AVFrame *src,
645  int hsub, int vsub,
646  int main_has_alpha,
647  int x, int y,
648  int is_straight)
649 {
650  OverlayContext *s = ctx->priv;
651  const int src_w = src->width;
652  const int src_h = src->height;
653  const int dst_w = dst->width;
654  const int dst_h = dst->height;
655 
656  blend_plane(ctx, dst, src, src_w, src_h, dst_w, dst_h, 0, 0, 0, x, y, main_has_alpha,
657  s->main_desc->comp[1].plane, s->main_desc->comp[1].offset, s->main_desc->comp[1].step, is_straight, 0);
658  blend_plane(ctx, dst, src, src_w, src_h, dst_w, dst_h, 1, hsub, vsub, x, y, main_has_alpha,
659  s->main_desc->comp[2].plane, s->main_desc->comp[2].offset, s->main_desc->comp[2].step, is_straight, 0);
660  blend_plane(ctx, dst, src, src_w, src_h, dst_w, dst_h, 2, hsub, vsub, x, y, main_has_alpha,
661  s->main_desc->comp[0].plane, s->main_desc->comp[0].offset, s->main_desc->comp[0].step, is_straight, 0);
662 
663  if (main_has_alpha)
664  alpha_composite(src, dst, src_w, src_h, dst_w, dst_h, x, y);
665 }
666 
667 static void blend_image_yuv420(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
668 {
669  blend_image_yuv(ctx, dst, src, 1, 1, 0, x, y, 1);
670 }
671 
672 static void blend_image_yuva420(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
673 {
674  blend_image_yuv(ctx, dst, src, 1, 1, 1, x, y, 1);
675 }
676 
677 static void blend_image_yuv422(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
678 {
679  blend_image_yuv(ctx, dst, src, 1, 0, 0, x, y, 1);
680 }
681 
682 static void blend_image_yuva422(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
683 {
684  blend_image_yuv(ctx, dst, src, 1, 0, 1, x, y, 1);
685 }
686 
687 static void blend_image_yuv444(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
688 {
689  blend_image_yuv(ctx, dst, src, 0, 0, 0, x, y, 1);
690 }
691 
692 static void blend_image_yuva444(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
693 {
694  blend_image_yuv(ctx, dst, src, 0, 0, 1, x, y, 1);
695 }
696 
697 static void blend_image_gbrp(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
698 {
699  blend_image_planar_rgb(ctx, dst, src, 0, 0, 0, x, y, 1);
700 }
701 
702 static void blend_image_gbrap(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
703 {
704  blend_image_planar_rgb(ctx, dst, src, 0, 0, 1, x, y, 1);
705 }
706 
707 static void blend_image_yuv420_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
708 {
709  blend_image_yuv(ctx, dst, src, 1, 1, 0, x, y, 0);
710 }
711 
712 static void blend_image_yuva420_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
713 {
714  blend_image_yuv(ctx, dst, src, 1, 1, 1, x, y, 0);
715 }
716 
717 static void blend_image_yuv422_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
718 {
719  blend_image_yuv(ctx, dst, src, 1, 0, 0, x, y, 0);
720 }
721 
722 static void blend_image_yuva422_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
723 {
724  blend_image_yuv(ctx, dst, src, 1, 0, 1, x, y, 0);
725 }
726 
727 static void blend_image_yuv444_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
728 {
729  blend_image_yuv(ctx, dst, src, 0, 0, 0, x, y, 0);
730 }
731 
732 static void blend_image_yuva444_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
733 {
734  blend_image_yuv(ctx, dst, src, 0, 0, 1, x, y, 0);
735 }
736 
737 static void blend_image_gbrp_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
738 {
739  blend_image_planar_rgb(ctx, dst, src, 0, 0, 0, x, y, 0);
740 }
741 
742 static void blend_image_gbrap_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
743 {
744  blend_image_planar_rgb(ctx, dst, src, 0, 0, 1, x, y, 0);
745 }
746 
747 static void blend_image_rgb(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
748 {
749  blend_image_packed_rgb(ctx, dst, src, 0, x, y, 1);
750 }
751 
752 static void blend_image_rgba(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
753 {
754  blend_image_packed_rgb(ctx, dst, src, 1, x, y, 1);
755 }
756 
757 static void blend_image_rgb_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
758 {
759  blend_image_packed_rgb(ctx, dst, src, 0, x, y, 0);
760 }
761 
762 static void blend_image_rgba_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
763 {
764  blend_image_packed_rgb(ctx, dst, src, 1, x, y, 0);
765 }
766 
767 static int config_input_main(AVFilterLink *inlink)
768 {
769  OverlayContext *s = inlink->dst->priv;
770  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
771 
773 
774  s->hsub = pix_desc->log2_chroma_w;
775  s->vsub = pix_desc->log2_chroma_h;
776 
777  s->main_desc = pix_desc;
778 
779  s->main_is_packed_rgb =
780  ff_fill_rgba_map(s->main_rgba_map, inlink->format) >= 0;
782  switch (s->format) {
785  break;
788  break;
791  break;
792  case OVERLAY_FORMAT_RGB:
794  break;
795  case OVERLAY_FORMAT_GBRP:
797  break;
798  case OVERLAY_FORMAT_AUTO:
799  switch (inlink->format) {
800  case AV_PIX_FMT_YUVA420P:
802  break;
803  case AV_PIX_FMT_YUVA422P:
805  break;
806  case AV_PIX_FMT_YUVA444P:
808  break;
809  case AV_PIX_FMT_ARGB:
810  case AV_PIX_FMT_RGBA:
811  case AV_PIX_FMT_BGRA:
812  case AV_PIX_FMT_ABGR:
814  break;
815  case AV_PIX_FMT_GBRAP:
817  break;
818  default:
819  av_assert0(0);
820  break;
821  }
822  break;
823  }
824 
825  if (!s->alpha_format)
826  return 0;
827 
828  switch (s->format) {
831  break;
834  break;
837  break;
838  case OVERLAY_FORMAT_RGB:
840  break;
841  case OVERLAY_FORMAT_GBRP:
843  break;
844  case OVERLAY_FORMAT_AUTO:
845  switch (inlink->format) {
846  case AV_PIX_FMT_YUVA420P:
848  break;
849  case AV_PIX_FMT_YUVA422P:
851  break;
852  case AV_PIX_FMT_YUVA444P:
854  break;
855  case AV_PIX_FMT_ARGB:
856  case AV_PIX_FMT_RGBA:
857  case AV_PIX_FMT_BGRA:
858  case AV_PIX_FMT_ABGR:
860  break;
861  case AV_PIX_FMT_GBRAP:
863  break;
864  default:
865  av_assert0(0);
866  break;
867  }
868  break;
869  }
870  return 0;
871 }
872 
873 static int do_blend(FFFrameSync *fs)
874 {
875  AVFilterContext *ctx = fs->parent;
876  AVFrame *mainpic, *second;
877  OverlayContext *s = ctx->priv;
878  AVFilterLink *inlink = ctx->inputs[0];
879  int ret;
880 
881  ret = ff_framesync_dualinput_get_writable(fs, &mainpic, &second);
882  if (ret < 0)
883  return ret;
884  if (!second)
885  return ff_filter_frame(ctx->outputs[0], mainpic);
886 
887  if (s->eval_mode == EVAL_MODE_FRAME) {
888  int64_t pos = mainpic->pkt_pos;
889 
890  s->var_values[VAR_N] = inlink->frame_count_out;
891  s->var_values[VAR_T] = mainpic->pts == AV_NOPTS_VALUE ?
892  NAN : mainpic->pts * av_q2d(inlink->time_base);
893  s->var_values[VAR_POS] = pos == -1 ? NAN : pos;
894 
895  s->var_values[VAR_OVERLAY_W] = s->var_values[VAR_OW] = second->width;
896  s->var_values[VAR_OVERLAY_H] = s->var_values[VAR_OH] = second->height;
897  s->var_values[VAR_MAIN_W ] = s->var_values[VAR_MW] = mainpic->width;
898  s->var_values[VAR_MAIN_H ] = s->var_values[VAR_MH] = mainpic->height;
899 
900  eval_expr(ctx);
901  av_log(ctx, AV_LOG_DEBUG, "n:%f t:%f pos:%f x:%f xi:%d y:%f yi:%d\n",
903  s->var_values[VAR_X], s->x,
904  s->var_values[VAR_Y], s->y);
905  }
906 
907  if (s->x < mainpic->width && s->x + second->width >= 0 ||
908  s->y < mainpic->height && s->y + second->height >= 0)
909  s->blend_image(ctx, mainpic, second, s->x, s->y);
910  return ff_filter_frame(ctx->outputs[0], mainpic);
911 }
912 
914 {
915  OverlayContext *s = ctx->priv;
916 
917  s->fs.on_event = do_blend;
918  return 0;
919 }
920 
922 {
923  OverlayContext *s = ctx->priv;
924  return ff_framesync_activate(&s->fs);
925 }
926 
927 #define OFFSET(x) offsetof(OverlayContext, x)
928 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
929 
930 static const AVOption overlay_options[] = {
931  { "x", "set the x expression", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX, FLAGS },
932  { "y", "set the y expression", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, CHAR_MIN, CHAR_MAX, FLAGS },
933  { "eof_action", "Action to take when encountering EOF from secondary input ",
934  OFFSET(fs.opt_eof_action), AV_OPT_TYPE_INT, { .i64 = EOF_ACTION_REPEAT },
935  EOF_ACTION_REPEAT, EOF_ACTION_PASS, .flags = FLAGS, "eof_action" },
936  { "repeat", "Repeat the previous frame.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_REPEAT }, .flags = FLAGS, "eof_action" },
937  { "endall", "End both streams.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_ENDALL }, .flags = FLAGS, "eof_action" },
938  { "pass", "Pass through the main input.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_PASS }, .flags = FLAGS, "eof_action" },
939  { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_FRAME}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
940  { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
941  { "frame", "eval expressions per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
942  { "shortest", "force termination when the shortest input terminates", OFFSET(fs.opt_shortest), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
943  { "format", "set output format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=OVERLAY_FORMAT_YUV420}, 0, OVERLAY_FORMAT_NB-1, FLAGS, "format" },
944  { "yuv420", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV420}, .flags = FLAGS, .unit = "format" },
945  { "yuv422", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV422}, .flags = FLAGS, .unit = "format" },
946  { "yuv444", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV444}, .flags = FLAGS, .unit = "format" },
947  { "rgb", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_RGB}, .flags = FLAGS, .unit = "format" },
948  { "gbrp", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_GBRP}, .flags = FLAGS, .unit = "format" },
949  { "auto", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_AUTO}, .flags = FLAGS, .unit = "format" },
950  { "repeatlast", "repeat overlay of the last overlay frame", OFFSET(fs.opt_repeatlast), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
951  { "alpha", "alpha format", OFFSET(alpha_format), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "alpha_format" },
952  { "straight", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, .flags = FLAGS, .unit = "alpha_format" },
953  { "premultiplied", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, .flags = FLAGS, .unit = "alpha_format" },
954  { NULL }
955 };
956 
958 
960  {
961  .name = "main",
962  .type = AVMEDIA_TYPE_VIDEO,
963  .config_props = config_input_main,
964  },
965  {
966  .name = "overlay",
967  .type = AVMEDIA_TYPE_VIDEO,
968  .config_props = config_input_overlay,
969  },
970  { NULL }
971 };
972 
974  {
975  .name = "default",
976  .type = AVMEDIA_TYPE_VIDEO,
977  .config_props = config_output,
978  },
979  { NULL }
980 };
981 
983  .name = "overlay",
984  .description = NULL_IF_CONFIG_SMALL("Overlay a video source on top of the input."),
985  .preinit = overlay_framesync_preinit,
986  .init = init,
987  .uninit = uninit,
988  .priv_size = sizeof(OverlayContext),
989  .priv_class = &overlay_class,
991  .activate = activate,
993  .inputs = avfilter_vf_overlay_inputs,
994  .outputs = avfilter_vf_overlay_outputs,
996 };
static int activate(AVFilterContext *ctx)
Definition: vf_overlay.c:921
int plane
Which of the 4 planes contains the component.
Definition: pixdesc.h:35
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
static void blend_image_yuva420_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:712
static const char * format[]
Definition: af_aiir.c:311
static float alpha(float a)
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2363
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
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:473
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.c:120
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:164
static const AVFilterPad avfilter_vf_overlay_inputs[]
Definition: vf_overlay.c:959
static void blend_image_rgb_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:757
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:117
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
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
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
static void blend_image_yuv422(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:677
#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:1124
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
AVOptions.
static void blend_image_yuv444(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:687
timestamp utils, mostly useful for debugging/logging purposes
static const char *const var_names[]
Definition: vf_overlay.c:43
int ff_framesync_init_dualinput(FFFrameSync *fs, AVFilterContext *parent)
Initialize a frame sync structure for dualinput.
Definition: framesync.c:361
#define G
Definition: vf_overlay.c:77
double var_values[VAR_VARS_NB]
Definition: vf_overlay.c:122
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:294
Definition: eval.c:157
#define R
Definition: vf_overlay.c:76
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:90
#define FAST_DIV255(x)
Definition: vf_overlay.c:394
uint8_t overlay_rgba_map[4]
Definition: vf_overlay.c:109
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
static int flags
Definition: log.c:55
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.c:125
static void blend_image_gbrap(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:702
#define sp
Definition: regdef.h:63
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
static void blend_image_yuva444(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:692
#define OVERLAY
Definition: vf_overlay.c:74
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 void blend_image_yuva422_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:722
A filter pad used for either input or output.
Definition: internal.h:54
int eval_mode
EvalMode.
Definition: vf_overlay.c:113
int format
OverlayFormat.
Definition: vf_overlay.c:111
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:172
int width
Definition: frame.h:259
#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 UNPREMULTIPLY_ALPHA(x, y)
Definition: vf_overlay.c:400
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
#define S(s, c, i)
Frame sync structure.
Definition: framesync.h:146
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)
Definition: vf_overlay.c:577
#define AVERROR(e)
Definition: error.h:43
uint8_t main_has_alpha
Definition: vf_overlay.c:107
#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
static void blend_image_yuv420_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:707
void * priv
private data for use by the filter
Definition: avfilter.h:353
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
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:329
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:114
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
var_name
Definition: aeval.c:46
as above, but U and V bytes are swapped
Definition: pixfmt.h:86
static void blend_image_yuv422_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:717
static const AVFilterPad avfilter_vf_overlay_outputs[]
Definition: vf_overlay.c:973
static void blend_image_yuva444_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:732
#define NAN
Definition: mathematics.h:64
#define FFMIN(a, b)
Definition: common.h:96
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:74
uint8_t main_rgba_map[4]
Definition: vf_overlay.c:106
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:440
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
OverlayFormat
Definition: vf_overlay.c:91
AVFormatContext * ctx
Definition: movenc.c:48
static av_always_inline void blend_image_planar_rgb(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int hsub, int vsub, int main_has_alpha, int x, int y, int is_straight)
Definition: vf_overlay.c:643
#define B
Definition: vf_overlay.c:78
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
static av_cold int init(AVFilterContext *ctx)
Definition: vf_overlay.c:913
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static void blend_image_yuva422(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:682
int main_pix_step[4]
steps per pixel for each plane of the main output
Definition: vf_overlay.c:117
EvalMode
Definition: af_volume.h:39
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
Definition: drawutils.c:35
static const AVOption overlay_options[]
Definition: vf_overlay.c:930
misc drawing utilities
static void blend_image_rgba_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:762
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:334
void(* blend_image)(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:127
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_overlay.c:130
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:232
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:158
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
AVExpr * x_pexpr
Definition: vf_overlay.c:125
#define OFFSET(x)
Definition: vf_overlay.c:927
int y
position of overlaid picture
Definition: vf_overlay.c:103
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)
Definition: vf_overlay.c:487
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
static void blend_image_rgb(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:747
uint8_t overlay_has_alpha
Definition: vf_overlay.c:110
#define FLAGS
Definition: vf_overlay.c:928
option
Definition: libkvazaar.c:282
#define isnan(x)
Definition: libm.h:340
uint8_t overlay_is_packed_rgb
Definition: vf_overlay.c:108
#define A
Definition: vf_overlay.c:79
const char * name
Filter name.
Definition: avfilter.h:148
static void blend_image_gbrp_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:737
static int query_formats(AVFilterContext *ctx)
Definition: vf_overlay.c:210
#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.c:118
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
static void blend_image_yuva420(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:672
int offset
Number of elements before the component of the first pixel.
Definition: pixdesc.h:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
static void blend_image_rgba(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:752
static int normalize_xy(double d, int chroma_sub)
Definition: vf_overlay.c:139
static int config_input_main(AVFilterLink *inlink)
Definition: vf_overlay.c:767
static av_always_inline void blend_image_yuv(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int hsub, int vsub, int main_has_alpha, int x, int y, int is_straight)
Definition: vf_overlay.c:619
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
common internal and external API header
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:211
static void blend_image_yuv420(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:667
int vsub
chroma subsampling values
Definition: vf_overlay.c:119
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:982
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:734
static void blend_image_gbrap_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:742
static int config_output(AVFilterLink *outlink)
Definition: vf_overlay.c:376
static void blend_image_yuv444_pm(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:727
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.c:105
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:179
FFFrameSync fs
Definition: vf_overlay.c:115
int height
Definition: frame.h:259
FRAMESYNC_DEFINE_CLASS(overlay, OverlayContext, fs)
#define MAIN
Definition: vf_overlay.c:73
static av_always_inline void blend_image_packed_rgb(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int main_has_alpha, int x, int y, int is_straight)
Blend image in src to destination buffer dst at position (x, y).
Definition: vf_overlay.c:406
#define av_freep(p)
#define av_always_inline
Definition: attributes.h:39
static void eval_expr(AVFilterContext *ctx)
Definition: vf_overlay.c:146
static int do_blend(FFFrameSync *fs)
Definition: vf_overlay.c:873
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:2279
internal API functions
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
static void blend_image_gbrp(AVFilterContext *ctx, AVFrame *dst, const AVFrame *src, int x, int y)
Definition: vf_overlay.c:697
for(j=16;j >0;--j)
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
static enum AVPixelFormat alpha_pix_fmts[]
Definition: vf_overlay.c:204
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