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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavfilter / vf_blend.c
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2ba45a60
DM		 1/*
2 * Copyright (c) 2013 Paul B Mahol
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#include "libavutil/imgutils.h"
22#include "libavutil/eval.h"
23#include "libavutil/opt.h"
24#include "libavutil/pixfmt.h"
25#include "avfilter.h"
26#include "bufferqueue.h"
27#include "formats.h"
28#include "internal.h"
29#include "dualinput.h"
30#include "video.h"
31
32#define TOP 0
33#define BOTTOM 1
34
35enum BlendMode {
36 BLEND_UNSET = -1,
37 BLEND_NORMAL,
38 BLEND_ADDITION,
39 BLEND_AND,
40 BLEND_AVERAGE,
41 BLEND_BURN,
42 BLEND_DARKEN,
43 BLEND_DIFFERENCE,
44 BLEND_DIVIDE,
45 BLEND_DODGE,
46 BLEND_EXCLUSION,
47 BLEND_HARDLIGHT,
48 BLEND_LIGHTEN,
49 BLEND_MULTIPLY,
50 BLEND_NEGATION,
51 BLEND_OR,
52 BLEND_OVERLAY,
53 BLEND_PHOENIX,
54 BLEND_PINLIGHT,
55 BLEND_REFLECT,
56 BLEND_SCREEN,
57 BLEND_SOFTLIGHT,
58 BLEND_SUBTRACT,
59 BLEND_VIVIDLIGHT,
60 BLEND_XOR,
61 BLEND_NB
62};
63
64static const char *const var_names[] = { "X", "Y", "W", "H", "SW", "SH", "T", "N", "A", "B", "TOP", "BOTTOM", NULL };
65enum { VAR_X, VAR_Y, VAR_W, VAR_H, VAR_SW, VAR_SH, VAR_T, VAR_N, VAR_A, VAR_B, VAR_TOP, VAR_BOTTOM, VAR_VARS_NB };
66
67typedef struct FilterParams {
68 enum BlendMode mode;
69 double opacity;
70 AVExpr *e;
71 char *expr_str;
72 void (*blend)(const uint8_t *top, int top_linesize,
73 const uint8_t *bottom, int bottom_linesize,
74 uint8_t *dst, int dst_linesize,
75 int width, int start, int end,
76 struct FilterParams *param, double *values);
77} FilterParams;
78
79typedef struct ThreadData {
80 const AVFrame *top, *bottom;
81 AVFrame *dst;
82 AVFilterLink *inlink;
83 int plane;
84 int w, h;
85 FilterParams *param;
86} ThreadData;
87
88typedef struct {
89 const AVClass *class;
90 FFDualInputContext dinput;
91 int hsub, vsub; ///< chroma subsampling values
92 int nb_planes;
93 char *all_expr;
94 enum BlendMode all_mode;
95 double all_opacity;
96
97 FilterParams params[4];
98} BlendContext;
99
100#define OFFSET(x) offsetof(BlendContext, x)
101#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
102
103static const AVOption blend_options[] = {
104 { "c0_mode", "set component #0 blend mode", OFFSET(params[0].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},
105 { "c1_mode", "set component #1 blend mode", OFFSET(params[1].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},
106 { "c2_mode", "set component #2 blend mode", OFFSET(params[2].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},
107 { "c3_mode", "set component #3 blend mode", OFFSET(params[3].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},
108 { "all_mode", "set blend mode for all components", OFFSET(all_mode), AV_OPT_TYPE_INT, {.i64=-1},-1, BLEND_NB-1, FLAGS, "mode"},
109 { "addition", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_ADDITION}, 0, 0, FLAGS, "mode" },
110 { "and", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AND}, 0, 0, FLAGS, "mode" },
111 { "average", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AVERAGE}, 0, 0, FLAGS, "mode" },
112 { "burn", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_BURN}, 0, 0, FLAGS, "mode" },
113 { "darken", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DARKEN}, 0, 0, FLAGS, "mode" },
114 { "difference", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE}, 0, 0, FLAGS, "mode" },
115 { "divide", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIVIDE}, 0, 0, FLAGS, "mode" },
116 { "dodge", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DODGE}, 0, 0, FLAGS, "mode" },
117 { "exclusion", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXCLUSION}, 0, 0, FLAGS, "mode" },
118 { "hardlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDLIGHT}, 0, 0, FLAGS, "mode" },
119 { "lighten", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LIGHTEN}, 0, 0, FLAGS, "mode" },
120 { "multiply", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY}, 0, 0, FLAGS, "mode" },
121 { "negation", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NEGATION}, 0, 0, FLAGS, "mode" },
122 { "normal", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NORMAL}, 0, 0, FLAGS, "mode" },
123 { "or", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OR}, 0, 0, FLAGS, "mode" },
124 { "overlay", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OVERLAY}, 0, 0, FLAGS, "mode" },
125 { "phoenix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PHOENIX}, 0, 0, FLAGS, "mode" },
126 { "pinlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PINLIGHT}, 0, 0, FLAGS, "mode" },
127 { "reflect", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_REFLECT}, 0, 0, FLAGS, "mode" },
128 { "screen", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SCREEN}, 0, 0, FLAGS, "mode" },
129 { "softlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SOFTLIGHT}, 0, 0, FLAGS, "mode" },
130 { "subtract", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SUBTRACT}, 0, 0, FLAGS, "mode" },
131 { "vividlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_VIVIDLIGHT}, 0, 0, FLAGS, "mode" },
132 { "xor", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_XOR}, 0, 0, FLAGS, "mode" },
133 { "c0_expr", "set color component #0 expression", OFFSET(params[0].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
134 { "c1_expr", "set color component #1 expression", OFFSET(params[1].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
135 { "c2_expr", "set color component #2 expression", OFFSET(params[2].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
136 { "c3_expr", "set color component #3 expression", OFFSET(params[3].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
137 { "all_expr", "set expression for all color components", OFFSET(all_expr), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
138 { "c0_opacity", "set color component #0 opacity", OFFSET(params[0].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
139 { "c1_opacity", "set color component #1 opacity", OFFSET(params[1].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
140 { "c2_opacity", "set color component #2 opacity", OFFSET(params[2].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
141 { "c3_opacity", "set color component #3 opacity", OFFSET(params[3].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
142 { "all_opacity", "set opacity for all color components", OFFSET(all_opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
143 { "shortest", "force termination when the shortest input terminates", OFFSET(dinput.shortest), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
144 { "repeatlast", "repeat last bottom frame", OFFSET(dinput.repeatlast), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS },
145 { NULL }
146};
147
148AVFILTER_DEFINE_CLASS(blend);
149
150static void blend_normal(const uint8_t *top, int top_linesize,
151 const uint8_t *bottom, int bottom_linesize,
152 uint8_t *dst, int dst_linesize,
153 int width, int start, int end,
154 FilterParams *param, double *values)
155{
156 av_image_copy_plane(dst, dst_linesize, top, top_linesize, width, end - start);
157}
158
159#define DEFINE_BLEND(name, expr) \
160static void blend_## name(const uint8_t *top, int top_linesize, \
161 const uint8_t *bottom, int bottom_linesize, \
162 uint8_t *dst, int dst_linesize, \
163 int width, int start, int end, \
164 FilterParams *param, double *values) \
165{ \
166 double opacity = param->opacity; \
167 int i, j; \
168 \
169 for (i = start; i < end; i++) { \
170 for (j = 0; j < width; j++) { \
171 dst[j] = top[j] + ((expr) - top[j]) * opacity; \
172 } \
173 dst += dst_linesize; \
174 top += top_linesize; \
175 bottom += bottom_linesize; \
176 } \
177}
178
179#define A top[j]
180#define B bottom[j]
181
182#define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 255))
183#define SCREEN(x, a, b) (255 - (x) * ((255 - (a)) * (255 - (b)) / 255))
184#define BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, 255 - ((255 - (b)) << 8) / (a)))
185#define DODGE(a, b) (((a) == 255) ? (a) : FFMIN(255, (((b) << 8) / (255 - (a)))))
186
187DEFINE_BLEND(addition, FFMIN(255, A + B))
188DEFINE_BLEND(average, (A + B) / 2)
189DEFINE_BLEND(subtract, FFMAX(0, A - B))
190DEFINE_BLEND(multiply, MULTIPLY(1, A, B))
191DEFINE_BLEND(negation, 255 - FFABS(255 - A - B))
192DEFINE_BLEND(difference, FFABS(A - B))
193DEFINE_BLEND(screen, SCREEN(1, A, B))
194DEFINE_BLEND(overlay, (A < 128) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
195DEFINE_BLEND(hardlight, (B < 128) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
196DEFINE_BLEND(darken, FFMIN(A, B))
197DEFINE_BLEND(lighten, FFMAX(A, B))
198DEFINE_BLEND(divide, ((float)A / ((float)B) * 255))
199DEFINE_BLEND(dodge, DODGE(A, B))
200DEFINE_BLEND(burn, BURN(A, B))
201DEFINE_BLEND(softlight, (A > 127) ? B + (255 - B) * (A - 127.5) / 127.5 * (0.5 - FFABS(B - 127.5) / 255): B - B * ((127.5 - A) / 127.5) * (0.5 - FFABS(B - 127.5)/255))
202DEFINE_BLEND(exclusion, A + B - 2 * A * B / 255)
203DEFINE_BLEND(pinlight, (B < 128) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 128)))
204DEFINE_BLEND(phoenix, FFMIN(A, B) - FFMAX(A, B) + 255)
205DEFINE_BLEND(reflect, (B == 255) ? B : FFMIN(255, (A * A / (255 - B))))
206DEFINE_BLEND(and, A & B)
207DEFINE_BLEND(or, A | B)
208DEFINE_BLEND(xor, A ^ B)
209DEFINE_BLEND(vividlight, (B < 128) ? BURN(A, 2 * B) : DODGE(A, 2 * (B - 128)))
210
211static void blend_expr(const uint8_t *top, int top_linesize,
212 const uint8_t *bottom, int bottom_linesize,
213 uint8_t *dst, int dst_linesize,
214 int width, int start, int end,
215 FilterParams *param, double *values)
216{
217 AVExpr *e = param->e;
218 int y, x;
219
220 for (y = start; y < end; y++) {
221 values[VAR_Y] = y;
222 for (x = 0; x < width; x++) {
223 values[VAR_X] = x;
224 values[VAR_TOP] = values[VAR_A] = top[x];
225 values[VAR_BOTTOM] = values[VAR_B] = bottom[x];
226 dst[x] = av_expr_eval(e, values, NULL);
227 }
228 dst += dst_linesize;
229 top += top_linesize;
230 bottom += bottom_linesize;
231 }
232}
233
234static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
235{
236 ThreadData *td = arg;
237 int slice_start = (td->h * jobnr ) / nb_jobs;
238 int slice_end = (td->h * (jobnr+1)) / nb_jobs;
239 const uint8_t *top = td->top->data[td->plane];
240 const uint8_t *bottom = td->bottom->data[td->plane];
241 uint8_t *dst = td->dst->data[td->plane];
242 double values[VAR_VARS_NB];
243
244 values[VAR_N] = td->inlink->frame_count;
245 values[VAR_T] = td->dst->pts == AV_NOPTS_VALUE ? NAN : td->dst->pts * av_q2d(td->inlink->time_base);
246 values[VAR_W] = td->w;
247 values[VAR_H] = td->h;
248 values[VAR_SW] = td->w / (double)td->dst->width;
249 values[VAR_SH] = td->h / (double)td->dst->height;
250
251 td->param->blend(top + slice_start * td->top->linesize[td->plane],
252 td->top->linesize[td->plane],
253 bottom + slice_start * td->bottom->linesize[td->plane],
254 td->bottom->linesize[td->plane],
255 dst + slice_start * td->dst->linesize[td->plane],
256 td->dst->linesize[td->plane],
257 td->w, slice_start, slice_end, td->param, &values[0]);
258 return 0;
259}
260
261static AVFrame *blend_frame(AVFilterContext *ctx, AVFrame *top_buf,
262 const AVFrame *bottom_buf)
263{
264 BlendContext *b = ctx->priv;
265 AVFilterLink *inlink = ctx->inputs[0];
266 AVFilterLink *outlink = ctx->outputs[0];
267 AVFrame *dst_buf;
268 int plane;
269
270 dst_buf = ff_get_video_buffer(outlink, outlink->w, outlink->h);
271 if (!dst_buf)
272 return top_buf;
273 av_frame_copy_props(dst_buf, top_buf);
274
275 for (plane = 0; plane < b->nb_planes; plane++) {
276 int hsub = plane == 1 || plane == 2 ? b->hsub : 0;
277 int vsub = plane == 1 || plane == 2 ? b->vsub : 0;
278 int outw = FF_CEIL_RSHIFT(dst_buf->width, hsub);
279 int outh = FF_CEIL_RSHIFT(dst_buf->height, vsub);
280 FilterParams *param = &b->params[plane];
281 ThreadData td = { .top = top_buf, .bottom = bottom_buf, .dst = dst_buf,
282 .w = outw, .h = outh, .param = param, .plane = plane,
283 .inlink = inlink };
284
285 ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outh, ctx->graph->nb_threads));
286 }
287
288 av_frame_free(&top_buf);
289
290 return dst_buf;
291}
292
293static av_cold int init(AVFilterContext *ctx)
294{
295 BlendContext *b = ctx->priv;
296 int ret, plane;
297
298 for (plane = 0; plane < FF_ARRAY_ELEMS(b->params); plane++) {
299 FilterParams *param = &b->params[plane];
300
301 if (b->all_mode >= 0)
302 param->mode = b->all_mode;
303 if (b->all_opacity < 1)
304 param->opacity = b->all_opacity;
305
306 switch (param->mode) {
307 case BLEND_ADDITION: param->blend = blend_addition; break;
308 case BLEND_AND: param->blend = blend_and; break;
309 case BLEND_AVERAGE: param->blend = blend_average; break;
310 case BLEND_BURN: param->blend = blend_burn; break;
311 case BLEND_DARKEN: param->blend = blend_darken; break;
312 case BLEND_DIFFERENCE: param->blend = blend_difference; break;
313 case BLEND_DIVIDE: param->blend = blend_divide; break;
314 case BLEND_DODGE: param->blend = blend_dodge; break;
315 case BLEND_EXCLUSION: param->blend = blend_exclusion; break;
316 case BLEND_HARDLIGHT: param->blend = blend_hardlight; break;
317 case BLEND_LIGHTEN: param->blend = blend_lighten; break;
318 case BLEND_MULTIPLY: param->blend = blend_multiply; break;
319 case BLEND_NEGATION: param->blend = blend_negation; break;
320 case BLEND_NORMAL: param->blend = blend_normal; break;
321 case BLEND_OR: param->blend = blend_or; break;
322 case BLEND_OVERLAY: param->blend = blend_overlay; break;
323 case BLEND_PHOENIX: param->blend = blend_phoenix; break;
324 case BLEND_PINLIGHT: param->blend = blend_pinlight; break;
325 case BLEND_REFLECT: param->blend = blend_reflect; break;
326 case BLEND_SCREEN: param->blend = blend_screen; break;
327 case BLEND_SOFTLIGHT: param->blend = blend_softlight; break;
328 case BLEND_SUBTRACT: param->blend = blend_subtract; break;
329 case BLEND_VIVIDLIGHT: param->blend = blend_vividlight; break;
330 case BLEND_XOR: param->blend = blend_xor; break;
331 }
332
333 if (b->all_expr && !param->expr_str) {
334 param->expr_str = av_strdup(b->all_expr);
335 if (!param->expr_str)
336 return AVERROR(ENOMEM);
337 }
338 if (param->expr_str) {
339 ret = av_expr_parse(&param->e, param->expr_str, var_names,
340 NULL, NULL, NULL, NULL, 0, ctx);
341 if (ret < 0)
342 return ret;
343 param->blend = blend_expr;
344 }
345 }
346
347 b->dinput.process = blend_frame;
348 return 0;
349}
350
351static int query_formats(AVFilterContext *ctx)
352{
353 static const enum AVPixelFormat pix_fmts[] = {
354 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
355 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
356 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
357 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE
358 };
359
360 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
361 return 0;
362}
363
364static int config_output(AVFilterLink *outlink)
365{
366 AVFilterContext *ctx = outlink->src;
367 AVFilterLink *toplink = ctx->inputs[TOP];
368 AVFilterLink *bottomlink = ctx->inputs[BOTTOM];
369 BlendContext *b = ctx->priv;
370 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(toplink->format);
371 int ret;
372
373 if (toplink->format != bottomlink->format) {
374 av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
375 return AVERROR(EINVAL);
376 }
377 if (toplink->w != bottomlink->w ||
378 toplink->h != bottomlink->h ||
379 toplink->sample_aspect_ratio.num != bottomlink->sample_aspect_ratio.num ||
380 toplink->sample_aspect_ratio.den != bottomlink->sample_aspect_ratio.den) {
381 av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
382 "(size %dx%d, SAR %d:%d) do not match the corresponding "
383 "second input link %s parameters (%dx%d, SAR %d:%d)\n",
384 ctx->input_pads[TOP].name, toplink->w, toplink->h,
385 toplink->sample_aspect_ratio.num,
386 toplink->sample_aspect_ratio.den,
387 ctx->input_pads[BOTTOM].name, bottomlink->w, bottomlink->h,
388 bottomlink->sample_aspect_ratio.num,
389 bottomlink->sample_aspect_ratio.den);
390 return AVERROR(EINVAL);
391 }
392
393 outlink->w = toplink->w;
394 outlink->h = toplink->h;
395 outlink->time_base = toplink->time_base;
396 outlink->sample_aspect_ratio = toplink->sample_aspect_ratio;
397 outlink->frame_rate = toplink->frame_rate;
398
399 b->hsub = pix_desc->log2_chroma_w;
400 b->vsub = pix_desc->log2_chroma_h;
401 b->nb_planes = av_pix_fmt_count_planes(toplink->format);
402
403 if ((ret = ff_dualinput_init(ctx, &b->dinput)) < 0)
404 return ret;
405
406 return 0;
407}
408
409static av_cold void uninit(AVFilterContext *ctx)
410{
411 BlendContext *b = ctx->priv;
412 int i;
413
414 ff_dualinput_uninit(&b->dinput);
415 for (i = 0; i < FF_ARRAY_ELEMS(b->params); i++)
416 av_expr_free(b->params[i].e);
417}
418
419static int request_frame(AVFilterLink *outlink)
420{
421 BlendContext *b = outlink->src->priv;
422 return ff_dualinput_request_frame(&b->dinput, outlink);
423}
424
425static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
426{
427 BlendContext *b = inlink->dst->priv;
428 return ff_dualinput_filter_frame(&b->dinput, inlink, buf);
429}
430
431static const AVFilterPad blend_inputs[] = {
432 {
433 .name = "top",
434 .type = AVMEDIA_TYPE_VIDEO,
435 .filter_frame = filter_frame,
436 },{
437 .name = "bottom",
438 .type = AVMEDIA_TYPE_VIDEO,
439 .filter_frame = filter_frame,
440 },
441 { NULL }
442};
443
444static const AVFilterPad blend_outputs[] = {
445 {
446 .name = "default",
447 .type = AVMEDIA_TYPE_VIDEO,
448 .config_props = config_output,
449 .request_frame = request_frame,
450 },
451 { NULL }
452};
453
454AVFilter ff_vf_blend = {
455 .name = "blend",
456 .description = NULL_IF_CONFIG_SMALL("Blend two video frames into each other."),
457 .init = init,
458 .uninit = uninit,
459 .priv_size = sizeof(BlendContext),
460 .query_formats = query_formats,
461 .inputs = blend_inputs,
462 .outputs = blend_outputs,
463 .priv_class = &blend_class,
464 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
465};
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