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 {
45 AVFrame *dst, *src;
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 {
76 EVAL_MODE_INIT,
77 EVAL_MODE_FRAME,
78 EVAL_MODE_NB
79 };
80
uninit(AVFilterContext * ctx)81 static av_cold void uninit(AVFilterContext *ctx)
82 {
83 OverlayContext *s = ctx->priv;
84
85 ff_framesync_uninit(&s->fs);
86 av_expr_free(s->x_pexpr); s->x_pexpr = NULL;
87 av_expr_free(s->y_pexpr); s->y_pexpr = NULL;
88 }
89
normalize_xy(double d,int chroma_sub)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
eval_expr(AVFilterContext * ctx)97 static void eval_expr(AVFilterContext *ctx)
98 {
99 OverlayContext *s = ctx->priv;
100
101 s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
102 s->var_values[VAR_Y] = av_expr_eval(s->y_pexpr, s->var_values, NULL);
103 /* It is necessary if x is expressed from y */
104 s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
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
set_expr(AVExpr ** pexpr,const char * expr,const char * option,void * log_ctx)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
process_command(AVFilterContext * ctx,const char * cmd,const char * args,char * res,int res_len,int flags)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[] = {
156 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
157 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10,
158 AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, AV_PIX_FMT_RGBA,
159 AV_PIX_FMT_BGRA, AV_PIX_FMT_GBRAP, AV_PIX_FMT_NONE
160 };
161
query_formats(AVFilterContext * ctx)162 static int query_formats(AVFilterContext *ctx)
163 {
164 OverlayContext *s = ctx->priv;
165
166 /* overlay formats contains alpha, for avoiding conversion with alpha information loss */
167 static const enum AVPixelFormat main_pix_fmts_yuv420[] = {
168 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVA420P,
169 AV_PIX_FMT_NV12, AV_PIX_FMT_NV21,
170 AV_PIX_FMT_NONE
171 };
172 static const enum AVPixelFormat overlay_pix_fmts_yuv420[] = {
173 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_NONE
174 };
175
176 static const enum AVPixelFormat main_pix_fmts_yuv420p10[] = {
177 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUVA420P10,
178 AV_PIX_FMT_NONE
179 };
180 static const enum AVPixelFormat overlay_pix_fmts_yuv420p10[] = {
181 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_NONE
182 };
183
184 static const enum AVPixelFormat main_pix_fmts_yuv422[] = {
185 AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_NONE
186 };
187 static const enum AVPixelFormat overlay_pix_fmts_yuv422[] = {
188 AV_PIX_FMT_YUVA422P, AV_PIX_FMT_NONE
189 };
190
191 static const enum AVPixelFormat main_pix_fmts_yuv422p10[] = {
192 AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_NONE
193 };
194 static const enum AVPixelFormat overlay_pix_fmts_yuv422p10[] = {
195 AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_NONE
196 };
197
198 static const enum AVPixelFormat main_pix_fmts_yuv444[] = {
199 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_NONE
200 };
201 static const enum AVPixelFormat overlay_pix_fmts_yuv444[] = {
202 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_NONE
203 };
204
205 static const enum AVPixelFormat main_pix_fmts_gbrp[] = {
206 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_NONE
207 };
208 static const enum AVPixelFormat overlay_pix_fmts_gbrp[] = {
209 AV_PIX_FMT_GBRAP, AV_PIX_FMT_NONE
210 };
211
212 static const enum AVPixelFormat main_pix_fmts_rgb[] = {
213 AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
214 AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
215 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
216 AV_PIX_FMT_NONE
217 };
218 static const enum AVPixelFormat overlay_pix_fmts_rgb[] = {
219 AV_PIX_FMT_ARGB, AV_PIX_FMT_RGBA,
220 AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA,
221 AV_PIX_FMT_NONE
222 };
223
224 const enum AVPixelFormat *main_formats, *overlay_formats;
225 AVFilterFormats *formats;
226 int ret;
227
228 switch (s->format) {
229 case OVERLAY_FORMAT_YUV420:
230 main_formats = main_pix_fmts_yuv420;
231 overlay_formats = overlay_pix_fmts_yuv420;
232 break;
233 case OVERLAY_FORMAT_YUV420P10:
234 main_formats = main_pix_fmts_yuv420p10;
235 overlay_formats = overlay_pix_fmts_yuv420p10;
236 break;
237 case OVERLAY_FORMAT_YUV422:
238 main_formats = main_pix_fmts_yuv422;
239 overlay_formats = overlay_pix_fmts_yuv422;
240 break;
241 case OVERLAY_FORMAT_YUV422P10:
242 main_formats = main_pix_fmts_yuv422p10;
243 overlay_formats = overlay_pix_fmts_yuv422p10;
244 break;
245 case OVERLAY_FORMAT_YUV444:
246 main_formats = main_pix_fmts_yuv444;
247 overlay_formats = overlay_pix_fmts_yuv444;
248 break;
249 case OVERLAY_FORMAT_RGB:
250 main_formats = main_pix_fmts_rgb;
251 overlay_formats = overlay_pix_fmts_rgb;
252 break;
253 case OVERLAY_FORMAT_GBRP:
254 main_formats = main_pix_fmts_gbrp;
255 overlay_formats = overlay_pix_fmts_gbrp;
256 break;
257 case OVERLAY_FORMAT_AUTO:
258 return ff_set_common_formats(ctx, ff_make_format_list(alpha_pix_fmts));
259 default:
260 av_assert0(0);
261 }
262
263 formats = ff_make_format_list(main_formats);
264 if ((ret = ff_formats_ref(formats, &ctx->inputs[MAIN]->outcfg.formats)) < 0 ||
265 (ret = ff_formats_ref(formats, &ctx->outputs[MAIN]->incfg.formats)) < 0)
266 return ret;
267
268 return ff_formats_ref(ff_make_format_list(overlay_formats),
269 &ctx->inputs[OVERLAY]->outcfg.formats);
270 }
271
config_input_overlay(AVFilterLink * inlink)272 static int config_input_overlay(AVFilterLink *inlink)
273 {
274 AVFilterContext *ctx = inlink->dst;
275 OverlayContext *s = inlink->dst->priv;
276 int ret;
277 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
278
279 av_image_fill_max_pixsteps(s->overlay_pix_step, NULL, pix_desc);
280
281 /* Finish the configuration by evaluating the expressions
282 now when both inputs are configured. */
283 s->var_values[VAR_MAIN_W ] = s->var_values[VAR_MW] = ctx->inputs[MAIN ]->w;
284 s->var_values[VAR_MAIN_H ] = s->var_values[VAR_MH] = ctx->inputs[MAIN ]->h;
285 s->var_values[VAR_OVERLAY_W] = s->var_values[VAR_OW] = ctx->inputs[OVERLAY]->w;
286 s->var_values[VAR_OVERLAY_H] = s->var_values[VAR_OH] = ctx->inputs[OVERLAY]->h;
287 s->var_values[VAR_HSUB] = 1<<pix_desc->log2_chroma_w;
288 s->var_values[VAR_VSUB] = 1<<pix_desc->log2_chroma_h;
289 s->var_values[VAR_X] = NAN;
290 s->var_values[VAR_Y] = NAN;
291 s->var_values[VAR_N] = 0;
292 s->var_values[VAR_T] = NAN;
293 s->var_values[VAR_POS] = NAN;
294
295 if ((ret = set_expr(&s->x_pexpr, s->x_expr, "x", ctx)) < 0 ||
296 (ret = set_expr(&s->y_pexpr, s->y_expr, "y", ctx)) < 0)
297 return ret;
298
299 s->overlay_is_packed_rgb =
300 ff_fill_rgba_map(s->overlay_rgba_map, inlink->format) >= 0;
301 s->overlay_has_alpha = ff_fmt_is_in(inlink->format, alpha_pix_fmts);
302
303 if (s->eval_mode == EVAL_MODE_INIT) {
304 eval_expr(ctx);
305 av_log(ctx, AV_LOG_VERBOSE, "x:%f xi:%d y:%f yi:%d\n",
306 s->var_values[VAR_X], s->x,
307 s->var_values[VAR_Y], s->y);
308 }
309
310 av_log(ctx, AV_LOG_VERBOSE,
311 "main w:%d h:%d fmt:%s overlay w:%d h:%d fmt:%s\n",
312 ctx->inputs[MAIN]->w, ctx->inputs[MAIN]->h,
313 av_get_pix_fmt_name(ctx->inputs[MAIN]->format),
314 ctx->inputs[OVERLAY]->w, ctx->inputs[OVERLAY]->h,
315 av_get_pix_fmt_name(ctx->inputs[OVERLAY]->format));
316 return 0;
317 }
318
config_output(AVFilterLink * outlink)319 static int config_output(AVFilterLink *outlink)
320 {
321 AVFilterContext *ctx = outlink->src;
322 OverlayContext *s = ctx->priv;
323 int ret;
324
325 if ((ret = ff_framesync_init_dualinput(&s->fs, ctx)) < 0)
326 return ret;
327
328 outlink->w = ctx->inputs[MAIN]->w;
329 outlink->h = ctx->inputs[MAIN]->h;
330 outlink->time_base = ctx->inputs[MAIN]->time_base;
331
332 return ff_framesync_configure(&s->fs);
333 }
334
335 // divide by 255 and round to nearest
336 // apply a fast variant: (X+127)/255 = ((X+127)*257+257)>>16 = ((X+128)*257)>>16
337 #define FAST_DIV255(x) ((((x) + 128) * 257) >> 16)
338
339 // calculate the unpremultiplied alpha, applying the general equation:
340 // alpha = alpha_overlay / ( (alpha_main + alpha_overlay) - (alpha_main * alpha_overlay) )
341 // (((x) << 16) - ((x) << 9) + (x)) is a faster version of: 255 * 255 * x
342 // ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)) is a faster version of: 255 * (x + y)
343 #define UNPREMULTIPLY_ALPHA(x, y) ((((x) << 16) - ((x) << 9) + (x)) / ((((x) + (y)) << 8) - ((x) + (y)) - (y) * (x)))
344
345 /**
346 * Blend image in src to destination buffer dst at position (x, y).
347 */
348
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)349 static av_always_inline void blend_slice_packed_rgb(AVFilterContext *ctx,
350 AVFrame *dst, const AVFrame *src,
351 int main_has_alpha, int x, int y,
352 int is_straight, int jobnr, int nb_jobs)
353 {
354 OverlayContext *s = ctx->priv;
355 int i, imax, j, jmax;
356 const int src_w = src->width;
357 const int src_h = src->height;
358 const int dst_w = dst->width;
359 const int dst_h = dst->height;
360 uint8_t alpha; ///< the amount of overlay to blend on to main
361 const int dr = s->main_rgba_map[R];
362 const int dg = s->main_rgba_map[G];
363 const int db = s->main_rgba_map[B];
364 const int da = s->main_rgba_map[A];
365 const int dstep = s->main_pix_step[0];
366 const int sr = s->overlay_rgba_map[R];
367 const int sg = s->overlay_rgba_map[G];
368 const int sb = s->overlay_rgba_map[B];
369 const int sa = s->overlay_rgba_map[A];
370 const int sstep = s->overlay_pix_step[0];
371 int slice_start, slice_end;
372 uint8_t *S, *sp, *d, *dp;
373
374 i = FFMAX(-y, 0);
375 imax = FFMIN3(-y + dst_h, FFMIN(src_h, dst_h), y + src_h);
376
377 slice_start = i + (imax * jobnr) / nb_jobs;
378 slice_end = i + (imax * (jobnr+1)) / nb_jobs;
379
380 sp = src->data[0] + (slice_start) * src->linesize[0];
381 dp = dst->data[0] + (y + slice_start) * dst->linesize[0];
382
383 for (i = slice_start; i < slice_end; i++) {
384 j = FFMAX(-x, 0);
385 S = sp + j * sstep;
386 d = dp + (x+j) * dstep;
387
388 for (jmax = FFMIN(-x + dst_w, src_w); j < jmax; j++) {
389 alpha = S[sa];
390
391 // if the main channel has an alpha channel, alpha has to be calculated
392 // to create an un-premultiplied (straight) alpha value
393 if (main_has_alpha && alpha != 0 && alpha != 255) {
394 uint8_t alpha_d = d[da];
395 alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d);
396 }
397
398 switch (alpha) {
399 case 0:
400 break;
401 case 255:
402 d[dr] = S[sr];
403 d[dg] = S[sg];
404 d[db] = S[sb];
405 break;
406 default:
407 // main_value = main_value * (1 - alpha) + overlay_value * alpha
408 // since alpha is in the range 0-255, the result must divided by 255
409 d[dr] = is_straight ? FAST_DIV255(d[dr] * (255 - alpha) + S[sr] * alpha) :
410 FFMIN(FAST_DIV255(d[dr] * (255 - alpha)) + S[sr], 255);
411 d[dg] = is_straight ? FAST_DIV255(d[dg] * (255 - alpha) + S[sg] * alpha) :
412 FFMIN(FAST_DIV255(d[dg] * (255 - alpha)) + S[sg], 255);
413 d[db] = is_straight ? FAST_DIV255(d[db] * (255 - alpha) + S[sb] * alpha) :
414 FFMIN(FAST_DIV255(d[db] * (255 - alpha)) + S[sb], 255);
415 }
416 if (main_has_alpha) {
417 switch (alpha) {
418 case 0:
419 break;
420 case 255:
421 d[da] = S[sa];
422 break;
423 default:
424 // apply alpha compositing: main_alpha += (1-main_alpha) * overlay_alpha
425 d[da] += FAST_DIV255((255 - d[da]) * S[sa]);
426 }
427 }
428 d += dstep;
429 S += sstep;
430 }
431 dp += dst->linesize[0];
432 sp += src->linesize[0];
433 }
434 }
435
436 #define DEFINE_BLEND_PLANE(depth, nbits) \
437 static av_always_inline void blend_plane_##depth##_##nbits##bits(AVFilterContext *ctx, \
438 AVFrame *dst, const AVFrame *src, \
439 int src_w, int src_h, \
440 int dst_w, int dst_h, \
441 int i, int hsub, int vsub, \
442 int x, int y, \
443 int main_has_alpha, \
444 int dst_plane, \
445 int dst_offset, \
446 int dst_step, \
447 int straight, \
448 int yuv, \
449 int jobnr, \
450 int nb_jobs) \
451 { \
452 OverlayContext *octx = ctx->priv; \
453 int src_wp = AV_CEIL_RSHIFT(src_w, hsub); \
454 int src_hp = AV_CEIL_RSHIFT(src_h, vsub); \
455 int dst_wp = AV_CEIL_RSHIFT(dst_w, hsub); \
456 int dst_hp = AV_CEIL_RSHIFT(dst_h, vsub); \
457 int yp = y>>vsub; \
458 int xp = x>>hsub; \
459 uint##depth##_t *s, *sp, *d, *dp, *dap, *a, *da, *ap; \
460 int jmax, j, k, kmax; \
461 int slice_start, slice_end; \
462 const uint##depth##_t max = (1 << nbits) - 1; \
463 const uint##depth##_t mid = (1 << (nbits -1)) ; \
464 int bytes = depth / 8; \
465 \
466 dst_step /= bytes; \
467 j = FFMAX(-yp, 0); \
468 jmax = FFMIN3(-yp + dst_hp, FFMIN(src_hp, dst_hp), yp + src_hp); \
469 \
470 slice_start = j + (jmax * jobnr) / nb_jobs; \
471 slice_end = j + (jmax * (jobnr+1)) / nb_jobs; \
472 \
473 sp = (uint##depth##_t *)(src->data[i] + (slice_start) * src->linesize[i]); \
474 dp = (uint##depth##_t *)(dst->data[dst_plane] \
475 + (yp + slice_start) * dst->linesize[dst_plane] \
476 + dst_offset); \
477 ap = (uint##depth##_t *)(src->data[3] + (slice_start << vsub) * src->linesize[3]); \
478 dap = (uint##depth##_t *)(dst->data[3] + ((yp + slice_start) << vsub) * dst->linesize[3]); \
479 \
480 for (j = slice_start; j < slice_end; j++) { \
481 k = FFMAX(-xp, 0); \
482 d = dp + (xp+k) * dst_step; \
483 s = sp + k; \
484 a = ap + (k<<hsub); \
485 da = dap + ((xp+k) << hsub); \
486 kmax = FFMIN(-xp + dst_wp, src_wp); \
487 \
488 if (nbits == 8 && ((vsub && j+1 < src_hp) || !vsub) && octx->blend_row[i]) { \
489 int c = octx->blend_row[i]((uint8_t*)d, (uint8_t*)da, (uint8_t*)s, \
490 (uint8_t*)a, kmax - k, src->linesize[3]); \
491 \
492 s += c; \
493 d += dst_step * c; \
494 da += (1 << hsub) * c; \
495 a += (1 << hsub) * c; \
496 k += c; \
497 } \
498 for (; k < kmax; k++) { \
499 int alpha_v, alpha_h, alpha; \
500 \
501 /* average alpha for color components, improve quality */ \
502 if (hsub && vsub && j+1 < src_hp && k+1 < src_wp) { \
503 alpha = (a[0] + a[src->linesize[3]] + \
504 a[1] + a[src->linesize[3]+1]) >> 2; \
505 } else if (hsub || vsub) { \
506 alpha_h = hsub && k+1 < src_wp ? \
507 (a[0] + a[1]) >> 1 : a[0]; \
508 alpha_v = vsub && j+1 < src_hp ? \
509 (a[0] + a[src->linesize[3]]) >> 1 : a[0]; \
510 alpha = (alpha_v + alpha_h) >> 1; \
511 } else \
512 alpha = a[0]; \
513 /* if the main channel has an alpha channel, alpha has to be calculated */ \
514 /* to create an un-premultiplied (straight) alpha value */ \
515 if (main_has_alpha && alpha != 0 && alpha != max) { \
516 /* average alpha for color components, improve quality */ \
517 uint8_t alpha_d; \
518 if (hsub && vsub && j+1 < src_hp && k+1 < src_wp) { \
519 alpha_d = (da[0] + da[dst->linesize[3]] + \
520 da[1] + da[dst->linesize[3]+1]) >> 2; \
521 } else if (hsub || vsub) { \
522 alpha_h = hsub && k+1 < src_wp ? \
523 (da[0] + da[1]) >> 1 : da[0]; \
524 alpha_v = vsub && j+1 < src_hp ? \
525 (da[0] + da[dst->linesize[3]]) >> 1 : da[0]; \
526 alpha_d = (alpha_v + alpha_h) >> 1; \
527 } else \
528 alpha_d = da[0]; \
529 alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d); \
530 } \
531 if (straight) { \
532 if (nbits > 8) \
533 *d = (*d * (max - alpha) + *s * alpha) / max; \
534 else \
535 *d = FAST_DIV255(*d * (255 - alpha) + *s * alpha); \
536 } else { \
537 if (nbits > 8) { \
538 if (i && yuv) \
539 *d = av_clip((*d * (max - alpha) + *s * alpha) / max + *s - mid, -mid, mid) + mid; \
540 else \
541 *d = FFMIN((*d * (max - alpha) + *s * alpha) / max + *s, max); \
542 } else { \
543 if (i && yuv) \
544 *d = av_clip(FAST_DIV255((*d - mid) * (max - alpha)) + *s - mid, -mid, mid) + mid; \
545 else \
546 *d = FFMIN(FAST_DIV255(*d * (max - alpha)) + *s, max); \
547 } \
548 } \
549 s++; \
550 d += dst_step; \
551 da += 1 << hsub; \
552 a += 1 << hsub; \
553 } \
554 dp += dst->linesize[dst_plane] / bytes; \
555 sp += src->linesize[i] / bytes; \
556 ap += (1 << vsub) * src->linesize[3] / bytes; \
557 dap += (1 << vsub) * dst->linesize[3] / bytes; \
558 } \
559 }
560 DEFINE_BLEND_PLANE(8, 8)
561 DEFINE_BLEND_PLANE(16, 10)
562
563 #define DEFINE_ALPHA_COMPOSITE(depth, nbits) \
564 static inline void alpha_composite_##depth##_##nbits##bits(const AVFrame *src, const AVFrame *dst, \
565 int src_w, int src_h, \
566 int dst_w, int dst_h, \
567 int x, int y, \
568 int jobnr, int nb_jobs) \
569 { \
570 uint##depth##_t alpha; /* the amount of overlay to blend on to main */ \
571 uint##depth##_t *s, *sa, *d, *da; \
572 int i, imax, j, jmax; \
573 int slice_start, slice_end; \
574 const uint##depth##_t max = (1 << nbits) - 1; \
575 int bytes = depth / 8; \
576 \
577 imax = FFMIN(-y + dst_h, src_h); \
578 slice_start = (imax * jobnr) / nb_jobs; \
579 slice_end = ((imax * (jobnr+1)) / nb_jobs); \
580 \
581 i = FFMAX(-y, 0); \
582 sa = (uint##depth##_t *)(src->data[3] + (i + slice_start) * src->linesize[3]); \
583 da = (uint##depth##_t *)(dst->data[3] + (y + i + slice_start) * dst->linesize[3]); \
584 \
585 for (i = i + slice_start; i < slice_end; i++) { \
586 j = FFMAX(-x, 0); \
587 s = sa + j; \
588 d = da + x+j; \
589 \
590 for (jmax = FFMIN(-x + dst_w, src_w); j < jmax; j++) { \
591 alpha = *s; \
592 if (alpha != 0 && alpha != max) { \
593 uint8_t alpha_d = *d; \
594 alpha = UNPREMULTIPLY_ALPHA(alpha, alpha_d); \
595 } \
596 if (alpha == max) \
597 *d = *s; \
598 else if (alpha > 0) { \
599 /* apply alpha compositing: main_alpha += (1-main_alpha) * overlay_alpha */ \
600 if (nbits > 8) \
601 *d += (max - *d) * *s / max; \
602 else \
603 *d += FAST_DIV255((max - *d) * *s); \
604 } \
605 d += 1; \
606 s += 1; \
607 } \
608 da += dst->linesize[3] / bytes; \
609 sa += src->linesize[3] / bytes; \
610 } \
611 }
612 DEFINE_ALPHA_COMPOSITE(8, 8)
613 DEFINE_ALPHA_COMPOSITE(16, 10)
614
615 #define DEFINE_BLEND_SLICE_YUV(depth, nbits) \
616 static av_always_inline void blend_slice_yuv_##depth##_##nbits##bits(AVFilterContext *ctx, \
617 AVFrame *dst, const AVFrame *src, \
618 int hsub, int vsub, \
619 int main_has_alpha, \
620 int x, int y, \
621 int is_straight, \
622 int jobnr, int nb_jobs) \
623 { \
624 OverlayContext *s = ctx->priv; \
625 const int src_w = src->width; \
626 const int src_h = src->height; \
627 const int dst_w = dst->width; \
628 const int dst_h = dst->height; \
629 \
630 blend_plane_##depth##_##nbits##bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 0, 0, 0, \
631 x, y, main_has_alpha, s->main_desc->comp[0].plane, s->main_desc->comp[0].offset, \
632 s->main_desc->comp[0].step, is_straight, 1, jobnr, nb_jobs); \
633 blend_plane_##depth##_##nbits##bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 1, hsub, vsub, \
634 x, y, main_has_alpha, s->main_desc->comp[1].plane, s->main_desc->comp[1].offset, \
635 s->main_desc->comp[1].step, is_straight, 1, jobnr, nb_jobs); \
636 blend_plane_##depth##_##nbits##bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 2, hsub, vsub, \
637 x, y, main_has_alpha, s->main_desc->comp[2].plane, s->main_desc->comp[2].offset, \
638 s->main_desc->comp[2].step, is_straight, 1, jobnr, nb_jobs); \
639 \
640 if (main_has_alpha) \
641 alpha_composite_##depth##_##nbits##bits(src, dst, src_w, src_h, dst_w, dst_h, x, y, \
642 jobnr, nb_jobs); \
643 }
644 DEFINE_BLEND_SLICE_YUV(8, 8)
645 DEFINE_BLEND_SLICE_YUV(16, 10)
646
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)647 static av_always_inline void blend_slice_planar_rgb(AVFilterContext *ctx,
648 AVFrame *dst, const AVFrame *src,
649 int hsub, int vsub,
650 int main_has_alpha,
651 int x, int y,
652 int is_straight,
653 int jobnr,
654 int nb_jobs)
655 {
656 OverlayContext *s = ctx->priv;
657 const int src_w = src->width;
658 const int src_h = src->height;
659 const int dst_w = dst->width;
660 const int dst_h = dst->height;
661
662 blend_plane_8_8bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 0, 0, 0, x, y, main_has_alpha,
663 s->main_desc->comp[1].plane, s->main_desc->comp[1].offset, s->main_desc->comp[1].step, is_straight, 0,
664 jobnr, nb_jobs);
665 blend_plane_8_8bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 1, hsub, vsub, x, y, main_has_alpha,
666 s->main_desc->comp[2].plane, s->main_desc->comp[2].offset, s->main_desc->comp[2].step, is_straight, 0,
667 jobnr, nb_jobs);
668 blend_plane_8_8bits(ctx, dst, src, src_w, src_h, dst_w, dst_h, 2, hsub, vsub, x, y, main_has_alpha,
669 s->main_desc->comp[0].plane, s->main_desc->comp[0].offset, s->main_desc->comp[0].step, is_straight, 0,
670 jobnr, nb_jobs);
671
672 if (main_has_alpha)
673 alpha_composite_8_8bits(src, dst, src_w, src_h, dst_w, dst_h, x, y, jobnr, nb_jobs);
674 }
675
blend_slice_yuv420(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)676 static int blend_slice_yuv420(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
677 {
678 OverlayContext *s = ctx->priv;
679 ThreadData *td = arg;
680 blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 1, 0, s->x, s->y, 1, jobnr, nb_jobs);
681 return 0;
682 }
683
blend_slice_yuva420(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)684 static int blend_slice_yuva420(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
685 {
686 OverlayContext *s = ctx->priv;
687 ThreadData *td = arg;
688 blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 1, 1, s->x, s->y, 1, jobnr, nb_jobs);
689 return 0;
690 }
691
blend_slice_yuv420p10(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)692 static int blend_slice_yuv420p10(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
693 {
694 OverlayContext *s = ctx->priv;
695 ThreadData *td = arg;
696 blend_slice_yuv_16_10bits(ctx, td->dst, td->src, 1, 1, 0, s->x, s->y, 1, jobnr, nb_jobs);
697 return 0;
698 }
699
blend_slice_yuva420p10(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)700 static int blend_slice_yuva420p10(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
701 {
702 OverlayContext *s = ctx->priv;
703 ThreadData *td = arg;
704 blend_slice_yuv_16_10bits(ctx, td->dst, td->src, 1, 1, 1, s->x, s->y, 1, jobnr, nb_jobs);
705 return 0;
706 }
707
blend_slice_yuv422p10(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)708 static int blend_slice_yuv422p10(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
709 {
710 OverlayContext *s = ctx->priv;
711 ThreadData *td = arg;
712 blend_slice_yuv_16_10bits(ctx, td->dst, td->src, 1, 0, 0, s->x, s->y, 1, jobnr, nb_jobs);
713 return 0;
714 }
715
blend_slice_yuva422p10(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)716 static int blend_slice_yuva422p10(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
717 {
718 OverlayContext *s = ctx->priv;
719 ThreadData *td = arg;
720 blend_slice_yuv_16_10bits(ctx, td->dst, td->src, 1, 0, 1, s->x, s->y, 1, jobnr, nb_jobs);
721 return 0;
722 }
723
blend_slice_yuv422(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)724 static int blend_slice_yuv422(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
725 {
726 OverlayContext *s = ctx->priv;
727 ThreadData *td = arg;
728 blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 0, 0, s->x, s->y, 1, jobnr, nb_jobs);
729 return 0;
730 }
731
blend_slice_yuva422(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)732 static int blend_slice_yuva422(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
733 {
734 OverlayContext *s = ctx->priv;
735 ThreadData *td = arg;
736 blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 0, 1, s->x, s->y, 1, jobnr, nb_jobs);
737 return 0;
738 }
739
blend_slice_yuv444(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)740 static int blend_slice_yuv444(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
741 {
742 OverlayContext *s = ctx->priv;
743 ThreadData *td = arg;
744 blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 0, 0, 0, s->x, s->y, 1, jobnr, nb_jobs);
745 return 0;
746 }
747
blend_slice_yuva444(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)748 static int blend_slice_yuva444(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
749 {
750 OverlayContext *s = ctx->priv;
751 ThreadData *td = arg;
752 blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 0, 0, 1, s->x, s->y, 1, jobnr, nb_jobs);
753 return 0;
754 }
755
blend_slice_gbrp(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)756 static int blend_slice_gbrp(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
757 {
758 OverlayContext *s = ctx->priv;
759 ThreadData *td = arg;
760 blend_slice_planar_rgb(ctx, td->dst, td->src, 0, 0, 0, s->x, s->y, 1, jobnr, nb_jobs);
761 return 0;
762 }
763
blend_slice_gbrap(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)764 static int blend_slice_gbrap(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
765 {
766 OverlayContext *s = ctx->priv;
767 ThreadData *td = arg;
768 blend_slice_planar_rgb(ctx, td->dst, td->src, 0, 0, 1, s->x, s->y, 1, jobnr, nb_jobs);
769 return 0;
770 }
771
blend_slice_yuv420_pm(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)772 static int blend_slice_yuv420_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
773 {
774 OverlayContext *s = ctx->priv;
775 ThreadData *td = arg;
776 blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 1, 0, s->x, s->y, 0, jobnr, nb_jobs);
777 return 0;
778 }
779
blend_slice_yuva420_pm(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)780 static int blend_slice_yuva420_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
781 {
782 OverlayContext *s = ctx->priv;
783 ThreadData *td = arg;
784 blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 1, 1, s->x, s->y, 0, jobnr, nb_jobs);
785 return 0;
786 }
787
blend_slice_yuv422_pm(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)788 static int blend_slice_yuv422_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
789 {
790 OverlayContext *s = ctx->priv;
791 ThreadData *td = arg;
792 blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 0, 0, s->x, s->y, 0, jobnr, nb_jobs);
793 return 0;
794 }
795
blend_slice_yuva422_pm(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)796 static int blend_slice_yuva422_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
797 {
798 OverlayContext *s = ctx->priv;
799 ThreadData *td = arg;
800 blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 1, 0, 1, s->x, s->y, 0, jobnr, nb_jobs);
801 return 0;
802 }
803
blend_slice_yuv444_pm(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)804 static int blend_slice_yuv444_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
805 {
806 OverlayContext *s = ctx->priv;
807 ThreadData *td = arg;
808 blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 0, 0, 0, s->x, s->y, 0, jobnr, nb_jobs);
809 return 0;
810 }
811
blend_slice_yuva444_pm(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)812 static int blend_slice_yuva444_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
813 {
814 OverlayContext *s = ctx->priv;
815 ThreadData *td = arg;
816 blend_slice_yuv_8_8bits(ctx, td->dst, td->src, 0, 0, 1, s->x, s->y, 0, jobnr, nb_jobs);
817 return 0;
818 }
819
blend_slice_gbrp_pm(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)820 static int blend_slice_gbrp_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
821 {
822 OverlayContext *s = ctx->priv;
823 ThreadData *td = arg;
824 blend_slice_planar_rgb(ctx, td->dst, td->src, 0, 0, 0, s->x, s->y, 0, jobnr, nb_jobs);
825 return 0;
826 }
827
blend_slice_gbrap_pm(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)828 static int blend_slice_gbrap_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
829 {
830 OverlayContext *s = ctx->priv;
831 ThreadData *td = arg;
832 blend_slice_planar_rgb(ctx, td->dst, td->src, 0, 0, 1, s->x, s->y, 0, jobnr, nb_jobs);
833 return 0;
834 }
835
blend_slice_rgb(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)836 static int blend_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
837 {
838 OverlayContext *s = ctx->priv;
839 ThreadData *td = arg;
840 blend_slice_packed_rgb(ctx, td->dst, td->src, 0, s->x, s->y, 1, jobnr, nb_jobs);
841 return 0;
842 }
843
blend_slice_rgba(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)844 static int blend_slice_rgba(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
845 {
846 OverlayContext *s = ctx->priv;
847 ThreadData *td = arg;
848 blend_slice_packed_rgb(ctx, td->dst, td->src, 1, s->x, s->y, 1, jobnr, nb_jobs);
849 return 0;
850 }
851
blend_slice_rgb_pm(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)852 static int blend_slice_rgb_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
853 {
854 OverlayContext *s = ctx->priv;
855 ThreadData *td = arg;
856 blend_slice_packed_rgb(ctx, td->dst, td->src, 0, s->x, s->y, 0, jobnr, nb_jobs);
857 return 0;
858 }
859
blend_slice_rgba_pm(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)860 static int blend_slice_rgba_pm(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
861 {
862 OverlayContext *s = ctx->priv;
863 ThreadData *td = arg;
864 blend_slice_packed_rgb(ctx, td->dst, td->src, 1, s->x, s->y, 0, jobnr, nb_jobs);
865 return 0;
866 }
867
config_input_main(AVFilterLink * inlink)868 static int config_input_main(AVFilterLink *inlink)
869 {
870 OverlayContext *s = inlink->dst->priv;
871 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
872
873 av_image_fill_max_pixsteps(s->main_pix_step, NULL, pix_desc);
874
875 s->hsub = pix_desc->log2_chroma_w;
876 s->vsub = pix_desc->log2_chroma_h;
877
878 s->main_desc = pix_desc;
879
880 s->main_is_packed_rgb =
881 ff_fill_rgba_map(s->main_rgba_map, inlink->format) >= 0;
882 s->main_has_alpha = ff_fmt_is_in(inlink->format, alpha_pix_fmts);
883 switch (s->format) {
884 case OVERLAY_FORMAT_YUV420:
885 s->blend_slice = s->main_has_alpha ? blend_slice_yuva420 : blend_slice_yuv420;
886 break;
887 case OVERLAY_FORMAT_YUV420P10:
888 s->blend_slice = s->main_has_alpha ? blend_slice_yuva420p10 : blend_slice_yuv420p10;
889 break;
890 case OVERLAY_FORMAT_YUV422:
891 s->blend_slice = s->main_has_alpha ? blend_slice_yuva422 : blend_slice_yuv422;
892 break;
893 case OVERLAY_FORMAT_YUV422P10:
894 s->blend_slice = s->main_has_alpha ? blend_slice_yuva422p10 : blend_slice_yuv422p10;
895 break;
896 case OVERLAY_FORMAT_YUV444:
897 s->blend_slice = s->main_has_alpha ? blend_slice_yuva444 : blend_slice_yuv444;
898 break;
899 case OVERLAY_FORMAT_RGB:
900 s->blend_slice = s->main_has_alpha ? blend_slice_rgba : blend_slice_rgb;
901 break;
902 case OVERLAY_FORMAT_GBRP:
903 s->blend_slice = s->main_has_alpha ? blend_slice_gbrap : blend_slice_gbrp;
904 break;
905 case OVERLAY_FORMAT_AUTO:
906 switch (inlink->format) {
907 case AV_PIX_FMT_YUVA420P:
908 s->blend_slice = blend_slice_yuva420;
909 break;
910 case AV_PIX_FMT_YUVA420P10:
911 s->blend_slice = blend_slice_yuva420p10;
912 break;
913 case AV_PIX_FMT_YUVA422P:
914 s->blend_slice = blend_slice_yuva422;
915 break;
916 case AV_PIX_FMT_YUVA422P10:
917 s->blend_slice = blend_slice_yuva422p10;
918 break;
919 case AV_PIX_FMT_YUVA444P:
920 s->blend_slice = blend_slice_yuva444;
921 break;
922 case AV_PIX_FMT_ARGB:
923 case AV_PIX_FMT_RGBA:
924 case AV_PIX_FMT_BGRA:
925 case AV_PIX_FMT_ABGR:
926 s->blend_slice = blend_slice_rgba;
927 break;
928 case AV_PIX_FMT_GBRAP:
929 s->blend_slice = blend_slice_gbrap;
930 break;
931 default:
932 av_assert0(0);
933 break;
934 }
935 break;
936 }
937
938 if (!s->alpha_format)
939 goto end;
940
941 switch (s->format) {
942 case OVERLAY_FORMAT_YUV420:
943 s->blend_slice = s->main_has_alpha ? blend_slice_yuva420_pm : blend_slice_yuv420_pm;
944 break;
945 case OVERLAY_FORMAT_YUV422:
946 s->blend_slice = s->main_has_alpha ? blend_slice_yuva422_pm : blend_slice_yuv422_pm;
947 break;
948 case OVERLAY_FORMAT_YUV444:
949 s->blend_slice = s->main_has_alpha ? blend_slice_yuva444_pm : blend_slice_yuv444_pm;
950 break;
951 case OVERLAY_FORMAT_RGB:
952 s->blend_slice = s->main_has_alpha ? blend_slice_rgba_pm : blend_slice_rgb_pm;
953 break;
954 case OVERLAY_FORMAT_GBRP:
955 s->blend_slice = s->main_has_alpha ? blend_slice_gbrap_pm : blend_slice_gbrp_pm;
956 break;
957 case OVERLAY_FORMAT_AUTO:
958 switch (inlink->format) {
959 case AV_PIX_FMT_YUVA420P:
960 s->blend_slice = blend_slice_yuva420_pm;
961 break;
962 case AV_PIX_FMT_YUVA422P:
963 s->blend_slice = blend_slice_yuva422_pm;
964 break;
965 case AV_PIX_FMT_YUVA444P:
966 s->blend_slice = blend_slice_yuva444_pm;
967 break;
968 case AV_PIX_FMT_ARGB:
969 case AV_PIX_FMT_RGBA:
970 case AV_PIX_FMT_BGRA:
971 case AV_PIX_FMT_ABGR:
972 s->blend_slice = blend_slice_rgba_pm;
973 break;
974 case AV_PIX_FMT_GBRAP:
975 s->blend_slice = blend_slice_gbrap_pm;
976 break;
977 default:
978 av_assert0(0);
979 break;
980 }
981 break;
982 }
983
984 end:
985 if (ARCH_X86)
986 ff_overlay_init_x86(s, s->format, inlink->format,
987 s->alpha_format, s->main_has_alpha);
988
989 return 0;
990 }
991
do_blend(FFFrameSync * fs)992 static int do_blend(FFFrameSync *fs)
993 {
994 AVFilterContext *ctx = fs->parent;
995 AVFrame *mainpic, *second;
996 OverlayContext *s = ctx->priv;
997 AVFilterLink *inlink = ctx->inputs[0];
998 int ret;
999
1000 ret = ff_framesync_dualinput_get_writable(fs, &mainpic, &second);
1001 if (ret < 0)
1002 return ret;
1003 if (!second)
1004 return ff_filter_frame(ctx->outputs[0], mainpic);
1005
1006 if (s->eval_mode == EVAL_MODE_FRAME) {
1007 int64_t pos = mainpic->pkt_pos;
1008
1009 s->var_values[VAR_N] = inlink->frame_count_out;
1010 s->var_values[VAR_T] = mainpic->pts == AV_NOPTS_VALUE ?
1011 NAN : mainpic->pts * av_q2d(inlink->time_base);
1012 s->var_values[VAR_POS] = pos == -1 ? NAN : pos;
1013
1014 s->var_values[VAR_OVERLAY_W] = s->var_values[VAR_OW] = second->width;
1015 s->var_values[VAR_OVERLAY_H] = s->var_values[VAR_OH] = second->height;
1016 s->var_values[VAR_MAIN_W ] = s->var_values[VAR_MW] = mainpic->width;
1017 s->var_values[VAR_MAIN_H ] = s->var_values[VAR_MH] = mainpic->height;
1018
1019 eval_expr(ctx);
1020 av_log(ctx, AV_LOG_DEBUG, "n:%f t:%f pos:%f x:%f xi:%d y:%f yi:%d\n",
1021 s->var_values[VAR_N], s->var_values[VAR_T], s->var_values[VAR_POS],
1022 s->var_values[VAR_X], s->x,
1023 s->var_values[VAR_Y], s->y);
1024 }
1025
1026 if (s->x < mainpic->width && s->x + second->width >= 0 &&
1027 s->y < mainpic->height && s->y + second->height >= 0) {
1028 ThreadData td;
1029
1030 td.dst = mainpic;
1031 td.src = second;
1032 ctx->internal->execute(ctx, s->blend_slice, &td, NULL, FFMIN(FFMAX(1, FFMIN3(s->y + second->height, FFMIN(second->height, mainpic->height), mainpic->height - s->y)),
1033 ff_filter_get_nb_threads(ctx)));
1034 }
1035 return ff_filter_frame(ctx->outputs[0], mainpic);
1036 }
1037
init(AVFilterContext * ctx)1038 static av_cold int init(AVFilterContext *ctx)
1039 {
1040 OverlayContext *s = ctx->priv;
1041
1042 s->fs.on_event = do_blend;
1043 return 0;
1044 }
1045
activate(AVFilterContext * ctx)1046 static int activate(AVFilterContext *ctx)
1047 {
1048 OverlayContext *s = ctx->priv;
1049 return ff_framesync_activate(&s->fs);
1050 }
1051
1052 #define OFFSET(x) offsetof(OverlayContext, x)
1053 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
1054
1055 static const AVOption overlay_options[] = {
1056 { "x", "set the x expression", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, FLAGS },
1057 { "y", "set the y expression", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, FLAGS },
1058 { "eof_action", "Action to take when encountering EOF from secondary input ",
1059 OFFSET(fs.opt_eof_action), AV_OPT_TYPE_INT, { .i64 = EOF_ACTION_REPEAT },
1060 EOF_ACTION_REPEAT, EOF_ACTION_PASS, .flags = FLAGS, "eof_action" },
1061 { "repeat", "Repeat the previous frame.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_REPEAT }, .flags = FLAGS, "eof_action" },
1062 { "endall", "End both streams.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_ENDALL }, .flags = FLAGS, "eof_action" },
1063 { "pass", "Pass through the main input.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_PASS }, .flags = FLAGS, "eof_action" },
1064 { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_FRAME}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
1065 { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
1066 { "frame", "eval expressions per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
1067 { "shortest", "force termination when the shortest input terminates", OFFSET(fs.opt_shortest), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
1068 { "format", "set output format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=OVERLAY_FORMAT_YUV420}, 0, OVERLAY_FORMAT_NB-1, FLAGS, "format" },
1069 { "yuv420", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV420}, .flags = FLAGS, .unit = "format" },
1070 { "yuv420p10", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV420P10}, .flags = FLAGS, .unit = "format" },
1071 { "yuv422", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV422}, .flags = FLAGS, .unit = "format" },
1072 { "yuv422p10", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV422P10}, .flags = FLAGS, .unit = "format" },
1073 { "yuv444", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_YUV444}, .flags = FLAGS, .unit = "format" },
1074 { "rgb", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_RGB}, .flags = FLAGS, .unit = "format" },
1075 { "gbrp", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_GBRP}, .flags = FLAGS, .unit = "format" },
1076 { "auto", "", 0, AV_OPT_TYPE_CONST, {.i64=OVERLAY_FORMAT_AUTO}, .flags = FLAGS, .unit = "format" },
1077 { "repeatlast", "repeat overlay of the last overlay frame", OFFSET(fs.opt_repeatlast), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
1078 { "alpha", "alpha format", OFFSET(alpha_format), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "alpha_format" },
1079 { "straight", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, .flags = FLAGS, .unit = "alpha_format" },
1080 { "premultiplied", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, .flags = FLAGS, .unit = "alpha_format" },
1081 { NULL }
1082 };
1083
1084 FRAMESYNC_DEFINE_CLASS(overlay, OverlayContext, fs);
1085
1086 static const AVFilterPad avfilter_vf_overlay_inputs[] = {
1087 {
1088 .name = "main",
1089 .type = AVMEDIA_TYPE_VIDEO,
1090 .config_props = config_input_main,
1091 },
1092 {
1093 .name = "overlay",
1094 .type = AVMEDIA_TYPE_VIDEO,
1095 .config_props = config_input_overlay,
1096 },
1097 { NULL }
1098 };
1099
1100 static const AVFilterPad avfilter_vf_overlay_outputs[] = {
1101 {
1102 .name = "default",
1103 .type = AVMEDIA_TYPE_VIDEO,
1104 .config_props = config_output,
1105 },
1106 { NULL }
1107 };
1108
1109 AVFilter ff_vf_overlay = {
1110 .name = "overlay",
1111 .description = NULL_IF_CONFIG_SMALL("Overlay a video source on top of the input."),
1112 .preinit = overlay_framesync_preinit,
1113 .init = init,
1114 .uninit = uninit,
1115 .priv_size = sizeof(OverlayContext),
1116 .priv_class = &overlay_class,
1117 .query_formats = query_formats,
1118 .activate = activate,
1119 .process_command = process_command,
1120 .inputs = avfilter_vf_overlay_inputs,
1121 .outputs = avfilter_vf_overlay_outputs,
1122 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
1123 AVFILTER_FLAG_SLICE_THREADS,
1124 };
1125