2 * Copyright (c) 2013 Paul B Mahol
4 * This file is part of FFmpeg.
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.
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.
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
21 #include "libavutil/imgutils.h"
22 #include "libavutil/eval.h"
23 #include "libavutil/opt.h"
24 #include "libavutil/pixfmt.h"
26 #include "bufferqueue.h"
29 #include "dualinput.h"
65 static const char *const var_names[] = { "X", "Y", "W", "H", "SW", "SH", "T", "N", "A", "B", "TOP", "BOTTOM", NULL };
66 enum { 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 };
68 typedef struct FilterParams {
73 void (*blend)(const uint8_t *top, int top_linesize,
74 const uint8_t *bottom, int bottom_linesize,
75 uint8_t *dst, int dst_linesize,
76 int width, int start, int end,
77 struct FilterParams *param, double *values);
80 typedef struct ThreadData {
81 const AVFrame *top, *bottom;
91 FFDualInputContext dinput;
92 int hsub, vsub; ///< chroma subsampling values
95 enum BlendMode all_mode;
98 FilterParams params[4];
100 AVFrame *prev_frame; /* only used with tblend */
103 #define COMMON_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 { "difference128", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE128}, 0, 0, FLAGS, "mode" },\
116 { "divide", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIVIDE}, 0, 0, FLAGS, "mode" },\
117 { "dodge", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DODGE}, 0, 0, FLAGS, "mode" },\
118 { "exclusion", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXCLUSION}, 0, 0, FLAGS, "mode" },\
119 { "hardlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDLIGHT}, 0, 0, FLAGS, "mode" },\
120 { "lighten", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LIGHTEN}, 0, 0, FLAGS, "mode" },\
121 { "multiply", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY}, 0, 0, FLAGS, "mode" },\
122 { "negation", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NEGATION}, 0, 0, FLAGS, "mode" },\
123 { "normal", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NORMAL}, 0, 0, FLAGS, "mode" },\
124 { "or", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OR}, 0, 0, FLAGS, "mode" },\
125 { "overlay", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OVERLAY}, 0, 0, FLAGS, "mode" },\
126 { "phoenix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PHOENIX}, 0, 0, FLAGS, "mode" },\
127 { "pinlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PINLIGHT}, 0, 0, FLAGS, "mode" },\
128 { "reflect", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_REFLECT}, 0, 0, FLAGS, "mode" },\
129 { "screen", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SCREEN}, 0, 0, FLAGS, "mode" },\
130 { "softlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SOFTLIGHT}, 0, 0, FLAGS, "mode" },\
131 { "subtract", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SUBTRACT}, 0, 0, FLAGS, "mode" },\
132 { "vividlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_VIVIDLIGHT}, 0, 0, FLAGS, "mode" },\
133 { "xor", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_XOR}, 0, 0, FLAGS, "mode" },\
134 { "c0_expr", "set color component #0 expression", OFFSET(params[0].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
135 { "c1_expr", "set color component #1 expression", OFFSET(params[1].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
136 { "c2_expr", "set color component #2 expression", OFFSET(params[2].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
137 { "c3_expr", "set color component #3 expression", OFFSET(params[3].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
138 { "all_expr", "set expression for all color components", OFFSET(all_expr), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
139 { "c0_opacity", "set color component #0 opacity", OFFSET(params[0].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
140 { "c1_opacity", "set color component #1 opacity", OFFSET(params[1].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
141 { "c2_opacity", "set color component #2 opacity", OFFSET(params[2].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
142 { "c3_opacity", "set color component #3 opacity", OFFSET(params[3].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
143 { "all_opacity", "set opacity for all color components", OFFSET(all_opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS}
145 #define OFFSET(x) offsetof(BlendContext, x)
146 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
148 static const AVOption blend_options[] = {
150 { "shortest", "force termination when the shortest input terminates", OFFSET(dinput.shortest), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
151 { "repeatlast", "repeat last bottom frame", OFFSET(dinput.repeatlast), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS },
155 AVFILTER_DEFINE_CLASS(blend);
157 static void blend_normal(const uint8_t *top, int top_linesize,
158 const uint8_t *bottom, int bottom_linesize,
159 uint8_t *dst, int dst_linesize,
160 int width, int start, int end,
161 FilterParams *param, double *values)
163 av_image_copy_plane(dst, dst_linesize, top, top_linesize, width, end - start);
166 #define DEFINE_BLEND(name, expr) \
167 static void blend_## name(const uint8_t *top, int top_linesize, \
168 const uint8_t *bottom, int bottom_linesize, \
169 uint8_t *dst, int dst_linesize, \
170 int width, int start, int end, \
171 FilterParams *param, double *values) \
173 double opacity = param->opacity; \
176 for (i = start; i < end; i++) { \
177 for (j = 0; j < width; j++) { \
178 dst[j] = top[j] + ((expr) - top[j]) * opacity; \
180 dst += dst_linesize; \
181 top += top_linesize; \
182 bottom += bottom_linesize; \
189 #define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 255))
190 #define SCREEN(x, a, b) (255 - (x) * ((255 - (a)) * (255 - (b)) / 255))
191 #define BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, 255 - ((255 - (b)) << 8) / (a)))
192 #define DODGE(a, b) (((a) == 255) ? (a) : FFMIN(255, (((b) << 8) / (255 - (a)))))
194 DEFINE_BLEND(addition, FFMIN(255, A + B))
195 DEFINE_BLEND(average, (A + B) / 2)
196 DEFINE_BLEND(subtract, FFMAX(0, A - B))
197 DEFINE_BLEND(multiply, MULTIPLY(1, A, B))
198 DEFINE_BLEND(negation, 255 - FFABS(255 - A - B))
199 DEFINE_BLEND(difference, FFABS(A - B))
200 DEFINE_BLEND(difference128, av_clip_uint8(128 + A - B))
201 DEFINE_BLEND(screen, SCREEN(1, A, B))
202 DEFINE_BLEND(overlay, (A < 128) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
203 DEFINE_BLEND(hardlight, (B < 128) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
204 DEFINE_BLEND(darken, FFMIN(A, B))
205 DEFINE_BLEND(lighten, FFMAX(A, B))
206 DEFINE_BLEND(divide, ((float)A / ((float)B) * 255))
207 DEFINE_BLEND(dodge, DODGE(A, B))
208 DEFINE_BLEND(burn, BURN(A, B))
209 DEFINE_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))
210 DEFINE_BLEND(exclusion, A + B - 2 * A * B / 255)
211 DEFINE_BLEND(pinlight, (B < 128) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 128)))
212 DEFINE_BLEND(phoenix, FFMIN(A, B) - FFMAX(A, B) + 255)
213 DEFINE_BLEND(reflect, (B == 255) ? B : FFMIN(255, (A * A / (255 - B))))
214 DEFINE_BLEND(and, A & B)
215 DEFINE_BLEND(or, A | B)
216 DEFINE_BLEND(xor, A ^ B)
217 DEFINE_BLEND(vividlight, (B < 128) ? BURN(A, 2 * B) : DODGE(A, 2 * (B - 128)))
219 static void blend_expr(const uint8_t *top, int top_linesize,
220 const uint8_t *bottom, int bottom_linesize,
221 uint8_t *dst, int dst_linesize,
222 int width, int start, int end,
223 FilterParams *param, double *values)
225 AVExpr *e = param->e;
228 for (y = start; y < end; y++) {
230 for (x = 0; x < width; x++) {
232 values[VAR_TOP] = values[VAR_A] = top[x];
233 values[VAR_BOTTOM] = values[VAR_B] = bottom[x];
234 dst[x] = av_expr_eval(e, values, NULL);
238 bottom += bottom_linesize;
242 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
244 ThreadData *td = arg;
245 int slice_start = (td->h * jobnr ) / nb_jobs;
246 int slice_end = (td->h * (jobnr+1)) / nb_jobs;
247 const uint8_t *top = td->top->data[td->plane];
248 const uint8_t *bottom = td->bottom->data[td->plane];
249 uint8_t *dst = td->dst->data[td->plane];
250 double values[VAR_VARS_NB];
252 values[VAR_N] = td->inlink->frame_count;
253 values[VAR_T] = td->dst->pts == AV_NOPTS_VALUE ? NAN : td->dst->pts * av_q2d(td->inlink->time_base);
254 values[VAR_W] = td->w;
255 values[VAR_H] = td->h;
256 values[VAR_SW] = td->w / (double)td->dst->width;
257 values[VAR_SH] = td->h / (double)td->dst->height;
259 td->param->blend(top + slice_start * td->top->linesize[td->plane],
260 td->top->linesize[td->plane],
261 bottom + slice_start * td->bottom->linesize[td->plane],
262 td->bottom->linesize[td->plane],
263 dst + slice_start * td->dst->linesize[td->plane],
264 td->dst->linesize[td->plane],
265 td->w, slice_start, slice_end, td->param, &values[0]);
269 static AVFrame *blend_frame(AVFilterContext *ctx, AVFrame *top_buf,
270 const AVFrame *bottom_buf)
272 BlendContext *b = ctx->priv;
273 AVFilterLink *inlink = ctx->inputs[0];
274 AVFilterLink *outlink = ctx->outputs[0];
278 dst_buf = ff_get_video_buffer(outlink, outlink->w, outlink->h);
281 av_frame_copy_props(dst_buf, top_buf);
283 for (plane = 0; plane < b->nb_planes; plane++) {
284 int hsub = plane == 1 || plane == 2 ? b->hsub : 0;
285 int vsub = plane == 1 || plane == 2 ? b->vsub : 0;
286 int outw = FF_CEIL_RSHIFT(dst_buf->width, hsub);
287 int outh = FF_CEIL_RSHIFT(dst_buf->height, vsub);
288 FilterParams *param = &b->params[plane];
289 ThreadData td = { .top = top_buf, .bottom = bottom_buf, .dst = dst_buf,
290 .w = outw, .h = outh, .param = param, .plane = plane,
293 ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outh, ctx->graph->nb_threads));
297 av_frame_free(&top_buf);
302 static av_cold int init(AVFilterContext *ctx)
304 BlendContext *b = ctx->priv;
307 b->tblend = !strcmp(ctx->filter->name, "tblend");
309 for (plane = 0; plane < FF_ARRAY_ELEMS(b->params); plane++) {
310 FilterParams *param = &b->params[plane];
312 if (b->all_mode >= 0)
313 param->mode = b->all_mode;
314 if (b->all_opacity < 1)
315 param->opacity = b->all_opacity;
317 switch (param->mode) {
318 case BLEND_ADDITION: param->blend = blend_addition; break;
319 case BLEND_AND: param->blend = blend_and; break;
320 case BLEND_AVERAGE: param->blend = blend_average; break;
321 case BLEND_BURN: param->blend = blend_burn; break;
322 case BLEND_DARKEN: param->blend = blend_darken; break;
323 case BLEND_DIFFERENCE: param->blend = blend_difference; break;
324 case BLEND_DIFFERENCE128: param->blend = blend_difference128; break;
325 case BLEND_DIVIDE: param->blend = blend_divide; break;
326 case BLEND_DODGE: param->blend = blend_dodge; break;
327 case BLEND_EXCLUSION: param->blend = blend_exclusion; break;
328 case BLEND_HARDLIGHT: param->blend = blend_hardlight; break;
329 case BLEND_LIGHTEN: param->blend = blend_lighten; break;
330 case BLEND_MULTIPLY: param->blend = blend_multiply; break;
331 case BLEND_NEGATION: param->blend = blend_negation; break;
332 case BLEND_NORMAL: param->blend = blend_normal; break;
333 case BLEND_OR: param->blend = blend_or; break;
334 case BLEND_OVERLAY: param->blend = blend_overlay; break;
335 case BLEND_PHOENIX: param->blend = blend_phoenix; break;
336 case BLEND_PINLIGHT: param->blend = blend_pinlight; break;
337 case BLEND_REFLECT: param->blend = blend_reflect; break;
338 case BLEND_SCREEN: param->blend = blend_screen; break;
339 case BLEND_SOFTLIGHT: param->blend = blend_softlight; break;
340 case BLEND_SUBTRACT: param->blend = blend_subtract; break;
341 case BLEND_VIVIDLIGHT: param->blend = blend_vividlight; break;
342 case BLEND_XOR: param->blend = blend_xor; break;
345 if (b->all_expr && !param->expr_str) {
346 param->expr_str = av_strdup(b->all_expr);
347 if (!param->expr_str)
348 return AVERROR(ENOMEM);
350 if (param->expr_str) {
351 ret = av_expr_parse(¶m->e, param->expr_str, var_names,
352 NULL, NULL, NULL, NULL, 0, ctx);
355 param->blend = blend_expr;
359 b->dinput.process = blend_frame;
363 static int query_formats(AVFilterContext *ctx)
365 static const enum AVPixelFormat pix_fmts[] = {
366 AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
367 AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
368 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
369 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE
372 ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
376 static av_cold void uninit(AVFilterContext *ctx)
378 BlendContext *b = ctx->priv;
381 ff_dualinput_uninit(&b->dinput);
382 av_frame_free(&b->prev_frame);
384 for (i = 0; i < FF_ARRAY_ELEMS(b->params); i++)
385 av_expr_free(b->params[i].e);
388 #if CONFIG_BLEND_FILTER
390 static int config_output(AVFilterLink *outlink)
392 AVFilterContext *ctx = outlink->src;
393 AVFilterLink *toplink = ctx->inputs[TOP];
394 AVFilterLink *bottomlink = ctx->inputs[BOTTOM];
395 BlendContext *b = ctx->priv;
396 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(toplink->format);
399 if (toplink->format != bottomlink->format) {
400 av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
401 return AVERROR(EINVAL);
403 if (toplink->w != bottomlink->w ||
404 toplink->h != bottomlink->h ||
405 toplink->sample_aspect_ratio.num != bottomlink->sample_aspect_ratio.num ||
406 toplink->sample_aspect_ratio.den != bottomlink->sample_aspect_ratio.den) {
407 av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
408 "(size %dx%d, SAR %d:%d) do not match the corresponding "
409 "second input link %s parameters (%dx%d, SAR %d:%d)\n",
410 ctx->input_pads[TOP].name, toplink->w, toplink->h,
411 toplink->sample_aspect_ratio.num,
412 toplink->sample_aspect_ratio.den,
413 ctx->input_pads[BOTTOM].name, bottomlink->w, bottomlink->h,
414 bottomlink->sample_aspect_ratio.num,
415 bottomlink->sample_aspect_ratio.den);
416 return AVERROR(EINVAL);
419 outlink->w = toplink->w;
420 outlink->h = toplink->h;
421 outlink->time_base = toplink->time_base;
422 outlink->sample_aspect_ratio = toplink->sample_aspect_ratio;
423 outlink->frame_rate = toplink->frame_rate;
425 b->hsub = pix_desc->log2_chroma_w;
426 b->vsub = pix_desc->log2_chroma_h;
427 b->nb_planes = av_pix_fmt_count_planes(toplink->format);
429 if ((ret = ff_dualinput_init(ctx, &b->dinput)) < 0)
435 static int request_frame(AVFilterLink *outlink)
437 BlendContext *b = outlink->src->priv;
438 return ff_dualinput_request_frame(&b->dinput, outlink);
441 static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
443 BlendContext *b = inlink->dst->priv;
444 return ff_dualinput_filter_frame(&b->dinput, inlink, buf);
447 static const AVFilterPad blend_inputs[] = {
450 .type = AVMEDIA_TYPE_VIDEO,
451 .filter_frame = filter_frame,
454 .type = AVMEDIA_TYPE_VIDEO,
455 .filter_frame = filter_frame,
460 static const AVFilterPad blend_outputs[] = {
463 .type = AVMEDIA_TYPE_VIDEO,
464 .config_props = config_output,
465 .request_frame = request_frame,
470 AVFilter ff_vf_blend = {
472 .description = NULL_IF_CONFIG_SMALL("Blend two video frames into each other."),
475 .priv_size = sizeof(BlendContext),
476 .query_formats = query_formats,
477 .inputs = blend_inputs,
478 .outputs = blend_outputs,
479 .priv_class = &blend_class,
480 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
485 #if CONFIG_TBLEND_FILTER
487 static int tblend_config_output(AVFilterLink *outlink)
489 AVFilterContext *ctx = outlink->src;
490 AVFilterLink *inlink = ctx->inputs[0];
491 BlendContext *b = ctx->priv;
492 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
494 b->hsub = pix_desc->log2_chroma_w;
495 b->vsub = pix_desc->log2_chroma_h;
496 b->nb_planes = av_pix_fmt_count_planes(inlink->format);
497 outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
502 static int tblend_filter_frame(AVFilterLink *inlink, AVFrame *frame)
504 BlendContext *b = inlink->dst->priv;
505 AVFilterLink *outlink = inlink->dst->outputs[0];
508 AVFrame *out = blend_frame(inlink->dst, frame, b->prev_frame);
509 av_frame_free(&b->prev_frame);
510 b->prev_frame = frame;
511 return ff_filter_frame(outlink, out);
513 b->prev_frame = frame;
517 static const AVOption tblend_options[] = {
522 AVFILTER_DEFINE_CLASS(tblend);
524 static const AVFilterPad tblend_inputs[] = {
527 .type = AVMEDIA_TYPE_VIDEO,
528 .filter_frame = tblend_filter_frame,
533 static const AVFilterPad tblend_outputs[] = {
536 .type = AVMEDIA_TYPE_VIDEO,
537 .config_props = tblend_config_output,
542 AVFilter ff_vf_tblend = {
544 .description = NULL_IF_CONFIG_SMALL("Blend successive frames."),
545 .priv_size = sizeof(BlendContext),
546 .priv_class = &tblend_class,
547 .query_formats = query_formats,
550 .inputs = tblend_inputs,
551 .outputs = tblend_outputs,
552 .flags = AVFILTER_FLAG_SLICE_THREADS,