FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/f_select.c
Date: 2025-07-03 17:22:30
Exec Total Coverage
Lines: 167 200 83.5%
Functions: 10 11 90.9%
Branches: 61 104 58.7%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2011 Stefano Sabatini
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 /**
22 * @file
23 * filter for selecting which frame passes in the filterchain
24 */
25
26 #include "config_components.h"
27
28 #include "libavutil/avstring.h"
29 #include "libavutil/eval.h"
30 #include "libavutil/fifo.h"
31 #include "libavutil/imgutils.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/pixdesc.h"
35 #include "avfilter.h"
36 #include "audio.h"
37 #include "filters.h"
38 #include "formats.h"
39 #include "video.h"
40 #include "scene_sad.h"
41
42 static const char *const var_names[] = {
43 "TB", ///< timebase
44
45 "pts", ///< original pts in the file of the frame
46 "start_pts", ///< first PTS in the stream, expressed in TB units
47 "prev_pts", ///< previous frame PTS
48 "prev_selected_pts", ///< previous selected frame PTS
49
50 "t", ///< timestamp expressed in seconds
51 "start_t", ///< first PTS in the stream, expressed in seconds
52 "prev_t", ///< previous frame time
53 "prev_selected_t", ///< previously selected time
54
55 "pict_type", ///< the type of picture in the movie
56 "I",
57 "P",
58 "B",
59 "S",
60 "SI",
61 "SP",
62 "BI",
63 "PICT_TYPE_I",
64 "PICT_TYPE_P",
65 "PICT_TYPE_B",
66 "PICT_TYPE_S",
67 "PICT_TYPE_SI",
68 "PICT_TYPE_SP",
69 "PICT_TYPE_BI",
70
71 "interlace_type", ///< the frame interlace type
72 "PROGRESSIVE",
73 "TOPFIRST",
74 "BOTTOMFIRST",
75
76 "consumed_samples_n",///< number of samples consumed by the filter (only audio)
77 "samples_n", ///< number of samples in the current frame (only audio)
78 "sample_rate", ///< sample rate (only audio)
79
80 "n", ///< frame number (starting from zero)
81 "selected_n", ///< selected frame number (starting from zero)
82 "prev_selected_n", ///< number of the last selected frame
83
84 "key", ///< tell if the frame is a key frame
85
86 "scene",
87
88 "concatdec_select", ///< frame is within the interval set by the concat demuxer
89
90 "ih", ///< ih: Represents the height of the input video frame.
91 "iw", ///< iw: Represents the width of the input video frame.
92
93 "view",
94
95 NULL
96 };
97
98 enum var_name {
99 VAR_TB,
100
101 VAR_PTS,
102 VAR_START_PTS,
103 VAR_PREV_PTS,
104 VAR_PREV_SELECTED_PTS,
105
106 VAR_T,
107 VAR_START_T,
108 VAR_PREV_T,
109 VAR_PREV_SELECTED_T,
110
111 VAR_PICT_TYPE,
112 VAR_I,
113 VAR_P,
114 VAR_B,
115 VAR_S,
116 VAR_SI,
117 VAR_SP,
118 VAR_BI,
119 VAR_PICT_TYPE_I,
120 VAR_PICT_TYPE_P,
121 VAR_PICT_TYPE_B,
122 VAR_PICT_TYPE_S,
123 VAR_PICT_TYPE_SI,
124 VAR_PICT_TYPE_SP,
125 VAR_PICT_TYPE_BI,
126
127 VAR_INTERLACE_TYPE,
128 VAR_INTERLACE_TYPE_P,
129 VAR_INTERLACE_TYPE_T,
130 VAR_INTERLACE_TYPE_B,
131
132 VAR_CONSUMED_SAMPLES_N,
133 VAR_SAMPLES_N,
134 VAR_SAMPLE_RATE,
135
136 VAR_N,
137 VAR_SELECTED_N,
138 VAR_PREV_SELECTED_N,
139
140 VAR_KEY,
141
142 VAR_SCENE,
143
144 VAR_CONCATDEC_SELECT,
145
146 VAR_IH,
147 VAR_IW,
148
149 VAR_VIEW,
150
151 VAR_VARS_NB
152 };
153
154 typedef struct SelectContext {
155 const AVClass *class;
156 char *expr_str;
157 AVExpr *expr;
158 double var_values[VAR_VARS_NB];
159 int bitdepth;
160 int nb_planes;
161 ptrdiff_t width[4];
162 ptrdiff_t height[4];
163 int do_scene_detect; ///< 1 if the expression requires scene detection variables, 0 otherwise
164 ff_scene_sad_fn sad; ///< Sum of the absolute difference function (scene detect only)
165 double prev_mafd; ///< previous MAFD (scene detect only)
166 AVFrame *prev_picref; ///< previous frame (scene detect only)
167 double select;
168 int select_out; ///< mark the selected output pad index
169 int nb_outputs;
170 } SelectContext;
171
172 #define OFFSET(x) offsetof(SelectContext, x)
173 #define DEFINE_OPTIONS(filt_name, FLAGS) \
174 static const AVOption filt_name##_options[] = { \
175 { "expr", "set an expression to use for selecting frames", OFFSET(expr_str), AV_OPT_TYPE_STRING, { .str = "1" }, .flags=FLAGS }, \
176 { "e", "set an expression to use for selecting frames", OFFSET(expr_str), AV_OPT_TYPE_STRING, { .str = "1" }, .flags=FLAGS }, \
177 { "outputs", "set the number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, .flags=FLAGS }, \
178 { "n", "set the number of outputs", OFFSET(nb_outputs), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, .flags=FLAGS }, \
179 { NULL } \
180 }
181
182 static int request_frame(AVFilterLink *outlink);
183
184 5 static av_cold int init(AVFilterContext *ctx)
185 {
186 5 SelectContext *select = ctx->priv;
187 int i, ret;
188
189
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 5 if ((ret = av_expr_parse(&select->expr, select->expr_str,
190 var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
191 ✗ av_log(ctx, AV_LOG_ERROR, "Error while parsing expression '%s'\n",
192 select->expr_str);
193 ✗ return ret;
194 }
195 5 select->do_scene_detect = !!strstr(select->expr_str, "scene");
196
197
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 10 for (i = 0; i < select->nb_outputs; i++) {
198 5 AVFilterPad pad = { 0 };
199
200 5 pad.name = av_asprintf("output%d", i);
201
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 5 if (!pad.name)
202 ✗ return AVERROR(ENOMEM);
203 5 pad.type = ctx->filter->inputs[0].type;
204 5 pad.request_frame = request_frame;
205
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 5 if ((ret = ff_append_outpad_free_name(ctx, &pad)) < 0)
206 ✗ return ret;
207 }
208
209 5 return 0;
210 }
211
212 #define INTERLACE_TYPE_P 0
213 #define INTERLACE_TYPE_T 1
214 #define INTERLACE_TYPE_B 2
215
216 3 static int config_input(AVFilterLink *inlink)
217 {
218 3 SelectContext *select = inlink->dst->priv;
219 3 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
220 9 int is_yuv = !(desc->flags & AV_PIX_FMT_FLAG_RGB) &&
221
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 5 (desc->flags & AV_PIX_FMT_FLAG_PLANAR) &&
222
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 2 desc->nb_components >= 3;
223
224 3 select->bitdepth = desc->comp[0].depth;
225
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 3 select->nb_planes = is_yuv ? 1 : av_pix_fmt_count_planes(inlink->format);
226
227
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 6 for (int plane = 0; plane < select->nb_planes; plane++) {
228 3 ptrdiff_t line_size = av_image_get_linesize(inlink->format, inlink->w, plane);
229 3 int vsub = desc->log2_chroma_h;
230
231 3 select->width[plane] = line_size >> (select->bitdepth > 8);
232
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 3 select->height[plane] = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT(inlink->h, vsub) : inlink->h;
233 }
234
235 3 select->var_values[VAR_N] = 0.0;
236 3 select->var_values[VAR_SELECTED_N] = 0.0;
237
238 3 select->var_values[VAR_TB] = av_q2d(inlink->time_base);
239
240 3 select->var_values[VAR_PREV_SELECTED_N] = NAN;
241 3 select->var_values[VAR_PREV_PTS] = NAN;
242 3 select->var_values[VAR_PREV_SELECTED_PTS] = NAN;
243 3 select->var_values[VAR_PREV_SELECTED_T] = NAN;
244 3 select->var_values[VAR_PREV_T] = NAN;
245 3 select->var_values[VAR_START_PTS] = NAN;
246 3 select->var_values[VAR_START_T] = NAN;
247
248 3 select->var_values[VAR_I] = AV_PICTURE_TYPE_I;
249 3 select->var_values[VAR_P] = AV_PICTURE_TYPE_P;
250 3 select->var_values[VAR_B] = AV_PICTURE_TYPE_B;
251 3 select->var_values[VAR_SI] = AV_PICTURE_TYPE_SI;
252 3 select->var_values[VAR_SP] = AV_PICTURE_TYPE_SP;
253 3 select->var_values[VAR_BI] = AV_PICTURE_TYPE_BI;
254 3 select->var_values[VAR_PICT_TYPE_I] = AV_PICTURE_TYPE_I;
255 3 select->var_values[VAR_PICT_TYPE_P] = AV_PICTURE_TYPE_P;
256 3 select->var_values[VAR_PICT_TYPE_B] = AV_PICTURE_TYPE_B;
257 3 select->var_values[VAR_PICT_TYPE_SI] = AV_PICTURE_TYPE_SI;
258 3 select->var_values[VAR_PICT_TYPE_SP] = AV_PICTURE_TYPE_SP;
259 3 select->var_values[VAR_PICT_TYPE_BI] = AV_PICTURE_TYPE_BI;
260
261 3 select->var_values[VAR_INTERLACE_TYPE_P] = INTERLACE_TYPE_P;
262 3 select->var_values[VAR_INTERLACE_TYPE_T] = INTERLACE_TYPE_T;
263 3 select->var_values[VAR_INTERLACE_TYPE_B] = INTERLACE_TYPE_B;
264
265 3 select->var_values[VAR_PICT_TYPE] = NAN;
266 3 select->var_values[VAR_INTERLACE_TYPE] = NAN;
267 3 select->var_values[VAR_SCENE] = NAN;
268 3 select->var_values[VAR_CONSUMED_SAMPLES_N] = NAN;
269 3 select->var_values[VAR_SAMPLES_N] = NAN;
270
271 3 select->var_values[VAR_IH] = NAN;
272 3 select->var_values[VAR_IW] = NAN;
273
274 3 select->var_values[VAR_SAMPLE_RATE] =
275
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 3 inlink->type == AVMEDIA_TYPE_AUDIO ? inlink->sample_rate : NAN;
276
277
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 3 if (CONFIG_SELECT_FILTER && select->do_scene_detect) {
278
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 1 select->sad = ff_scene_sad_get_fn(select->bitdepth == 8 ? 8 : 16);
279
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 1 if (!select->sad)
280 ✗ return AVERROR(EINVAL);
281 }
282 3 return 0;
283 }
284
285 1308 static double get_scene_score(AVFilterContext *ctx, AVFrame *frame)
286 {
287 1308 double ret = 0;
288 1308 SelectContext *select = ctx->priv;
289 1308 AVFrame *prev_picref = select->prev_picref;
290
291
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 1308 if (prev_picref &&
292
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 1307 frame->height == prev_picref->height &&
293
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 1307 frame->width == prev_picref->width) {
294 1307 uint64_t sad = 0;
295 double mafd, diff;
296 1307 uint64_t count = 0;
297
298
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 2614 for (int plane = 0; plane < select->nb_planes; plane++) {
299 uint64_t plane_sad;
300 1307 select->sad(prev_picref->data[plane], prev_picref->linesize[plane],
301 1307 frame->data[plane], frame->linesize[plane],
302 select->width[plane], select->height[plane], &plane_sad);
303 1307 sad += plane_sad;
304 1307 count += select->width[plane] * select->height[plane];
305 }
306
307 1307 mafd = (double)sad / count / (1ULL << (select->bitdepth - 8));
308 1307 diff = fabs(mafd - select->prev_mafd);
309
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 1307 ret = av_clipf(FFMIN(mafd, diff) / 100., 0, 1);
310 1307 select->prev_mafd = mafd;
311 1307 av_frame_free(&prev_picref);
312 }
313 1308 select->prev_picref = av_frame_clone(frame);
314 1308 return ret;
315 }
316
317 1408 static double get_concatdec_select(AVFrame *frame, int64_t pts)
318 {
319 1408 AVDictionary *metadata = frame->metadata;
320 1408 AVDictionaryEntry *start_time_entry = av_dict_get(metadata, "lavf.concatdec.start_time", NULL, 0);
321 1408 AVDictionaryEntry *duration_entry = av_dict_get(metadata, "lavf.concatdec.duration", NULL, 0);
322
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 1408 if (start_time_entry) {
323 ✗ int64_t start_time = strtoll(start_time_entry->value, NULL, 10);
324 ✗ if (pts >= start_time) {
325 ✗ if (duration_entry) {
326 ✗ int64_t duration = strtoll(duration_entry->value, NULL, 10);
327 ✗ if (pts < start_time + duration)
328 ✗ return -1;
329 else
330 ✗ return 0;
331 }
332 ✗ return -1;
333 }
334 ✗ return 0;
335 }
336 1408 return NAN;
337 }
338
339 1408 static void select_frame(AVFilterContext *ctx, AVFrame *frame)
340 {
341 1408 SelectContext *select = ctx->priv;
342 1408 AVFilterLink *inlink = ctx->inputs[0];
343 1408 FilterLink *inl = ff_filter_link(inlink);
344 const AVFrameSideData *sd;
345 double res;
346
347
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 1408 if (isnan(select->var_values[VAR_START_PTS]))
348
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 3 select->var_values[VAR_START_PTS] = TS2D(frame->pts);
349
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 1408 if (isnan(select->var_values[VAR_START_T]))
350
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 3 select->var_values[VAR_START_T] = TS2D(frame->pts) * av_q2d(inlink->time_base);
351
352 1408 select->var_values[VAR_N ] = inl->frame_count_out;
353
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 1408 select->var_values[VAR_PTS] = TS2D(frame->pts);
354
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 1408 select->var_values[VAR_T ] = TS2D(frame->pts) * av_q2d(inlink->time_base);
355
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 1408 select->var_values[VAR_KEY] = !!(frame->flags & AV_FRAME_FLAG_KEY);
356 1408 select->var_values[VAR_CONCATDEC_SELECT] = get_concatdec_select(frame, av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q));
357
358
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 1408 switch (inlink->type) {
359 ✗ case AVMEDIA_TYPE_AUDIO:
360 ✗ select->var_values[VAR_SAMPLES_N] = frame->nb_samples;
361 ✗ break;
362
363 1408 case AVMEDIA_TYPE_VIDEO:
364 1408 select->var_values[VAR_IH] = frame->height;
365 1408 select->var_values[VAR_IW] = frame->width;
366
367 1408 select->var_values[VAR_INTERLACE_TYPE] =
368
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 1408 !(frame->flags & AV_FRAME_FLAG_INTERLACED) ? INTERLACE_TYPE_P :
369 ✗ (frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST) ? INTERLACE_TYPE_T : INTERLACE_TYPE_B;
370 1408 select->var_values[VAR_PICT_TYPE] = frame->pict_type;
371
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 1408 if (select->do_scene_detect) {
372 char buf[32];
373 1308 select->var_values[VAR_SCENE] = get_scene_score(ctx, frame);
374 // TODO: document metadata
375 1308 snprintf(buf, sizeof(buf), "%f", select->var_values[VAR_SCENE]);
376 1308 av_dict_set(&frame->metadata, "lavfi.scene_score", buf, 0);
377 }
378
379 1408 sd = av_frame_side_data_get(frame->side_data, frame->nb_side_data,
380 AV_FRAME_DATA_VIEW_ID);
381
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 1408 select->var_values[VAR_VIEW] = sd ? *(int*)sd->data : NAN;
382 1408 break;
383 }
384
385 1408 select->select = res = av_expr_eval(select->expr, select->var_values, NULL);
386 1408 av_log(inlink->dst, AV_LOG_DEBUG,
387 "n:%f pts:%f t:%f key:%d",
388 select->var_values[VAR_N],
389 select->var_values[VAR_PTS],
390 select->var_values[VAR_T],
391 1408 !!(frame->flags & AV_FRAME_FLAG_KEY));
392
393
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 1408 switch (inlink->type) {
394 1408 case AVMEDIA_TYPE_VIDEO:
395 1408 av_log(inlink->dst, AV_LOG_DEBUG, " interlace_type:%c pict_type:%c scene:%f",
396
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 1408 !(frame->flags & AV_FRAME_FLAG_INTERLACED) ? 'P' :
397 ✗ (frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST) ? 'T' : 'B',
398 1408 av_get_picture_type_char(frame->pict_type),
399 select->var_values[VAR_SCENE]);
400 1408 break;
401 ✗ case AVMEDIA_TYPE_AUDIO:
402 ✗ av_log(inlink->dst, AV_LOG_DEBUG, " samples_n:%d consumed_samples_n:%f",
403 frame->nb_samples,
404 select->var_values[VAR_CONSUMED_SAMPLES_N]);
405 ✗ break;
406 }
407
408
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 1408 if (res == 0) {
409 1355 select->select_out = -1; /* drop */
410
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 53 } else if (isnan(res) || res < 0) {
411 ✗ select->select_out = 0; /* first output */
412 } else {
413
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 53 select->select_out = FFMIN(ceilf(res)-1, select->nb_outputs-1); /* other outputs */
414 }
415
416 1408 av_log(inlink->dst, AV_LOG_DEBUG, " -> select:%f select_out:%d\n", res, select->select_out);
417
418
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 1408 if (res) {
419 53 select->var_values[VAR_PREV_SELECTED_N] = select->var_values[VAR_N];
420 53 select->var_values[VAR_PREV_SELECTED_PTS] = select->var_values[VAR_PTS];
421 53 select->var_values[VAR_PREV_SELECTED_T] = select->var_values[VAR_T];
422 53 select->var_values[VAR_SELECTED_N] += 1.0;
423
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 53 if (inlink->type == AVMEDIA_TYPE_AUDIO)
424 ✗ select->var_values[VAR_CONSUMED_SAMPLES_N] += frame->nb_samples;
425 }
426
427 1408 select->var_values[VAR_PREV_PTS] = select->var_values[VAR_PTS];
428 1408 select->var_values[VAR_PREV_T] = select->var_values[VAR_T];
429 1408 }
430
431 1408 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
432 {
433 1408 AVFilterContext *ctx = inlink->dst;
434 1408 SelectContext *select = ctx->priv;
435
436 1408 select_frame(ctx, frame);
437
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 1408 if (select->select)
438 53 return ff_filter_frame(ctx->outputs[select->select_out], frame);
439
440 1355 av_frame_free(&frame);
441 1355 return 0;
442 }
443
444 1412 static int request_frame(AVFilterLink *outlink)
445 {
446 1412 AVFilterLink *inlink = outlink->src->inputs[0];
447 1412 int ret = ff_request_frame(inlink);
448 1412 return ret;
449 }
450
451 5 static av_cold void uninit(AVFilterContext *ctx)
452 {
453 5 SelectContext *select = ctx->priv;
454
455 5 av_expr_free(select->expr);
456 5 select->expr = NULL;
457
458
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 5 if (select->do_scene_detect) {
459 1 av_frame_free(&select->prev_picref);
460 }
461 5 }
462
463 #if CONFIG_ASELECT_FILTER
464
465 DEFINE_OPTIONS(aselect, AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
466 AVFILTER_DEFINE_CLASS(aselect);
467
468 ✗ static av_cold int aselect_init(AVFilterContext *ctx)
469 {
470 ✗ SelectContext *select = ctx->priv;
471 int ret;
472
473 ✗ if ((ret = init(ctx)) < 0)
474 ✗ return ret;
475
476 ✗ if (select->do_scene_detect) {
477 ✗ av_log(ctx, AV_LOG_ERROR, "Scene detection is ignored in aselect filter\n");
478 ✗ return AVERROR(EINVAL);
479 }
480
481 ✗ return 0;
482 }
483
484 static const AVFilterPad avfilter_af_aselect_inputs[] = {
485 {
486 .name = "default",
487 .type = AVMEDIA_TYPE_AUDIO,
488 .config_props = config_input,
489 .filter_frame = filter_frame,
490 },
491 };
492
493 const FFFilter ff_af_aselect = {
494 .p.name = "aselect",
495 .p.description = NULL_IF_CONFIG_SMALL("Select audio frames to pass in output."),
496 .p.priv_class = &aselect_class,
497 .p.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
498 .init = aselect_init,
499 .uninit = uninit,
500 .priv_size = sizeof(SelectContext),
501 FILTER_INPUTS(avfilter_af_aselect_inputs),
502 };
503 #endif /* CONFIG_ASELECT_FILTER */
504
505 #if CONFIG_SELECT_FILTER
506
507 3 static int query_formats(const AVFilterContext *ctx,
508 AVFilterFormatsConfig **cfg_in,
509 AVFilterFormatsConfig **cfg_out)
510 {
511 3 const SelectContext *select = ctx->priv;
512
513
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 3 if (select->do_scene_detect) {
514 static const enum AVPixelFormat pix_fmts[] = {
515 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, AV_PIX_FMT_RGBA,
516 AV_PIX_FMT_ABGR, AV_PIX_FMT_BGRA, AV_PIX_FMT_GRAY8,
517 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
518 AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P,
519 AV_PIX_FMT_YUV420P10,
520 AV_PIX_FMT_NONE
521 };
522 1 return ff_set_common_formats_from_list2(ctx, cfg_in, cfg_out, pix_fmts);
523 }
524 2 return 0;
525 }
526
527 DEFINE_OPTIONS(select, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
528 AVFILTER_DEFINE_CLASS(select);
529
530 5 static av_cold int select_init(AVFilterContext *ctx)
531 {
532 int ret;
533
534
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 5 if ((ret = init(ctx)) < 0)
535 ✗ return ret;
536
537 5 return 0;
538 }
539
540 static const AVFilterPad avfilter_vf_select_inputs[] = {
541 {
542 .name = "default",
543 .type = AVMEDIA_TYPE_VIDEO,
544 .config_props = config_input,
545 .filter_frame = filter_frame,
546 },
547 };
548
549 const FFFilter ff_vf_select = {
550 .p.name = "select",
551 .p.description = NULL_IF_CONFIG_SMALL("Select video frames to pass in output."),
552 .p.priv_class = &select_class,
553 .p.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS | AVFILTER_FLAG_METADATA_ONLY,
554 .init = select_init,
555 .uninit = uninit,
556 .priv_size = sizeof(SelectContext),
557 FILTER_INPUTS(avfilter_vf_select_inputs),
558 FILTER_QUERY_FUNC2(query_formats),
559 };
560 #endif /* CONFIG_SELECT_FILTER */
561