FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/avf_concat.c
Date: 2024-02-16 17:37:06
Exec Total Coverage
Lines: 200 227 88.1%
Functions: 12 13 92.3%
Branches: 100 128 78.1%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2012 Nicolas George
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.
14 * See the GNU Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /**
22 * @file
23 * concat audio-video filter
24 */
25
26 #include "libavutil/avstring.h"
27 #include "libavutil/channel_layout.h"
28 #include "libavutil/opt.h"
29 #include "avfilter.h"
30 #include "filters.h"
31 #include "formats.h"
32 #include "internal.h"
33 #include "video.h"
34 #include "audio.h"
35
36 #define TYPE_ALL 2
37
38 typedef struct ConcatContext {
39 const AVClass *class;
40 unsigned nb_streams[TYPE_ALL]; /**< number of out streams of each type */
41 unsigned nb_segments;
42 unsigned cur_idx; /**< index of the first input of current segment */
43 int64_t delta_ts; /**< timestamp to add to produce output timestamps */
44 unsigned nb_in_active; /**< number of active inputs in current segment */
45 unsigned unsafe;
46 struct concat_in {
47 int64_t pts;
48 int64_t nb_frames;
49 unsigned eof;
50 } *in;
51 } ConcatContext;
52
53 #define OFFSET(x) offsetof(ConcatContext, x)
54 #define A AV_OPT_FLAG_AUDIO_PARAM
55 #define F AV_OPT_FLAG_FILTERING_PARAM
56 #define V AV_OPT_FLAG_VIDEO_PARAM
57
58 static const AVOption concat_options[] = {
59 { "n", "specify the number of segments", OFFSET(nb_segments),
60 AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, V|A|F},
61 { "v", "specify the number of video streams",
62 OFFSET(nb_streams[AVMEDIA_TYPE_VIDEO]),
63 AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, V|F },
64 { "a", "specify the number of audio streams",
65 OFFSET(nb_streams[AVMEDIA_TYPE_AUDIO]),
66 AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A|F},
67 { "unsafe", "enable unsafe mode",
68 OFFSET(unsafe),
69 AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, V|A|F},
70 { NULL }
71 };
72
73 AVFILTER_DEFINE_CLASS(concat);
74
75 4 static int query_formats(AVFilterContext *ctx)
76 {
77 4 ConcatContext *cat = ctx->priv;
78 4 unsigned type, nb_str, idx0 = 0, idx, str, seg;
79 4 AVFilterFormats *formats, *rates = NULL;
80 4 AVFilterChannelLayouts *layouts = NULL;
81 int ret;
82
83
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12 for (type = 0; type < TYPE_ALL; type++) {
84 8 nb_str = cat->nb_streams[type];
85
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14 for (str = 0; str < nb_str; str++) {
86 6 idx = idx0;
87
88 /* Set the output formats */
89 6 formats = ff_all_formats(type);
90
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6 if ((ret = ff_formats_ref(formats, &ctx->outputs[idx]->incfg.formats)) < 0)
91 return ret;
92
93
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6 if (type == AVMEDIA_TYPE_AUDIO) {
94 2 rates = ff_all_samplerates();
95
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2 if ((ret = ff_formats_ref(rates, &ctx->outputs[idx]->incfg.samplerates)) < 0)
96 return ret;
97 2 layouts = ff_all_channel_layouts();
98
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2 if ((ret = ff_channel_layouts_ref(layouts, &ctx->outputs[idx]->incfg.channel_layouts)) < 0)
99 return ret;
100 }
101
102 /* Set the same formats for each corresponding input */
103
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22 for (seg = 0; seg < cat->nb_segments; seg++) {
104
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16 if ((ret = ff_formats_ref(formats, &ctx->inputs[idx]->outcfg.formats)) < 0)
105 return ret;
106
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16 if (type == AVMEDIA_TYPE_AUDIO) {
107
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12 if ((ret = ff_formats_ref(rates, &ctx->inputs[idx]->outcfg.samplerates)) < 0 ||
108 6 (ret = ff_channel_layouts_ref(layouts, &ctx->inputs[idx]->outcfg.channel_layouts)) < 0)
109 return ret;
110 }
111 16 idx += ctx->nb_outputs;
112 }
113
114 6 idx0++;
115 }
116 }
117 4 return 0;
118 }
119
120 6 static int config_output(AVFilterLink *outlink)
121 {
122 6 AVFilterContext *ctx = outlink->src;
123 6 ConcatContext *cat = ctx->priv;
124 6 unsigned out_no = FF_OUTLINK_IDX(outlink);
125 6 unsigned in_no = out_no, seg;
126 6 AVFilterLink *inlink = ctx->inputs[in_no];
127
128 /* enhancement: find a common one */
129 6 outlink->time_base = AV_TIME_BASE_Q;
130 6 outlink->w = inlink->w;
131 6 outlink->h = inlink->h;
132 6 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
133 6 outlink->format = inlink->format;
134 6 outlink->frame_rate = inlink->frame_rate;
135
136
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14 for (seg = 1; seg < cat->nb_segments; seg++) {
137 9 inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
138
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9 if (outlink->frame_rate.num != inlink->frame_rate.num ||
139
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8 outlink->frame_rate.den != inlink->frame_rate.den) {
140 1 av_log(ctx, AV_LOG_VERBOSE,
141 "Video inputs have different frame rates, output will be VFR\n");
142 1 outlink->frame_rate = av_make_q(1, 0);
143 1 break;
144 }
145 }
146
147
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16 for (seg = 1; seg < cat->nb_segments; seg++) {
148 10 inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
149
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10 if (!outlink->sample_aspect_ratio.num)
150 5 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
151 /* possible enhancement: unsafe mode, do not check */
152
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10 if (outlink->w != inlink->w ||
153
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9 outlink->h != inlink->h ||
154
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9 outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num &&
155 inlink->sample_aspect_ratio.num ||
156
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9 outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
157 1 av_log(ctx, AV_LOG_ERROR, "Input link %s parameters "
158 "(size %dx%d, SAR %d:%d) do not match the corresponding "
159 "output link %s parameters (%dx%d, SAR %d:%d)\n",
160 1 ctx->input_pads[in_no].name, inlink->w, inlink->h,
161 inlink->sample_aspect_ratio.num,
162 inlink->sample_aspect_ratio.den,
163 1 ctx->input_pads[out_no].name, outlink->w, outlink->h,
164 outlink->sample_aspect_ratio.num,
165 outlink->sample_aspect_ratio.den);
166
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1 if (!cat->unsafe)
167 return AVERROR(EINVAL);
168 }
169 }
170
171 6 return 0;
172 }
173
174 463 static int push_frame(AVFilterContext *ctx, unsigned in_no, AVFrame *buf)
175 {
176 463 ConcatContext *cat = ctx->priv;
177 463 unsigned out_no = in_no % ctx->nb_outputs;
178 463 AVFilterLink * inlink = ctx-> inputs[ in_no];
179 463 AVFilterLink *outlink = ctx->outputs[out_no];
180 463 struct concat_in *in = &cat->in[in_no];
181
182 463 buf->pts = av_rescale_q(buf->pts, inlink->time_base, outlink->time_base);
183 463 buf->duration = av_rescale_q(buf->duration, inlink->time_base, outlink->time_base);
184 463 in->pts = buf->pts;
185 463 in->nb_frames++;
186 /* add duration to input PTS */
187
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463 if (inlink->sample_rate)
188 /* use number of audio samples */
189 350 in->pts += av_rescale_q(buf->nb_samples,
190 av_make_q(1, inlink->sample_rate),
191 outlink->time_base);
192
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113 else if (in->nb_frames >= 2)
193 /* use mean duration */
194 103 in->pts = av_rescale(in->pts, in->nb_frames, in->nb_frames - 1);
195
196 463 buf->pts += cat->delta_ts;
197 463 return ff_filter_frame(outlink, buf);
198 }
199
200 63 static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h)
201 {
202 63 AVFilterContext *ctx = inlink->dst;
203 63 unsigned in_no = FF_INLINK_IDX(inlink);
204 63 AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
205
206 63 return ff_get_video_buffer(outlink, w, h);
207 }
208
209 350 static AVFrame *get_audio_buffer(AVFilterLink *inlink, int nb_samples)
210 {
211 350 AVFilterContext *ctx = inlink->dst;
212 350 unsigned in_no = FF_INLINK_IDX(inlink);
213 350 AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
214
215 350 return ff_get_audio_buffer(outlink, nb_samples);
216 }
217
218 16 static void close_input(AVFilterContext *ctx, unsigned in_no)
219 {
220 16 ConcatContext *cat = ctx->priv;
221
222 16 cat->in[in_no].eof = 1;
223 16 cat->nb_in_active--;
224 16 av_log(ctx, AV_LOG_VERBOSE, "EOF on %s, %d streams left in segment.\n",
225 16 ctx->input_pads[in_no].name, cat->nb_in_active);
226 16 }
227
228 10 static void find_next_delta_ts(AVFilterContext *ctx, int64_t *seg_delta)
229 {
230 10 ConcatContext *cat = ctx->priv;
231 10 unsigned i = cat->cur_idx;
232 10 unsigned imax = i + ctx->nb_outputs;
233 int64_t pts;
234
235 10 pts = cat->in[i++].pts;
236
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16 for (; i < imax; i++)
237 6 pts = FFMAX(pts, cat->in[i].pts);
238 10 cat->delta_ts += pts;
239 10 *seg_delta = pts;
240 10 }
241
242 4 static int send_silence(AVFilterContext *ctx, unsigned in_no, unsigned out_no,
243 int64_t seg_delta)
244 {
245 4 ConcatContext *cat = ctx->priv;
246 4 AVFilterLink *outlink = ctx->outputs[out_no];
247 4 int64_t base_pts = cat->in[in_no].pts + cat->delta_ts - seg_delta;
248 4 int64_t nb_samples, sent = 0;
249 int frame_nb_samples, ret;
250 4 AVRational rate_tb = { 1, ctx->inputs[in_no]->sample_rate };
251 AVFrame *buf;
252
253
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4 if (!rate_tb.den)
254 return AVERROR_BUG;
255
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4 if (cat->in[in_no].pts < INT64_MIN + seg_delta)
256 return AVERROR_INVALIDDATA;
257
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4 if (seg_delta < cat->in[in_no].pts)
258 return AVERROR_INVALIDDATA;
259 4 nb_samples = av_rescale_q(seg_delta - cat->in[in_no].pts,
260 outlink->time_base, rate_tb);
261
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4 frame_nb_samples = FFMAX(9600, rate_tb.den / 5); /* arbitrary */
262
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14 while (nb_samples) {
263 10 frame_nb_samples = FFMIN(frame_nb_samples, nb_samples);
264 10 buf = ff_get_audio_buffer(outlink, frame_nb_samples);
265
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10 if (!buf)
266 return AVERROR(ENOMEM);
267 10 av_samples_set_silence(buf->extended_data, 0, frame_nb_samples,
268 10 outlink->ch_layout.nb_channels, outlink->format);
269 10 buf->pts = base_pts + av_rescale_q(sent, rate_tb, outlink->time_base);
270 10 ret = ff_filter_frame(outlink, buf);
271
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10 if (ret < 0)
272 return ret;
273 10 sent += frame_nb_samples;
274 10 nb_samples -= frame_nb_samples;
275 }
276 4 return 0;
277 }
278
279 10 static int flush_segment(AVFilterContext *ctx)
280 {
281 int ret;
282 10 ConcatContext *cat = ctx->priv;
283 unsigned str, str_max;
284 int64_t seg_delta;
285
286 10 find_next_delta_ts(ctx, &seg_delta);
287 10 cat->cur_idx += ctx->nb_outputs;
288 10 cat->nb_in_active = ctx->nb_outputs;
289 10 av_log(ctx, AV_LOG_VERBOSE, "Segment finished at pts=%"PRId64"\n",
290 cat->delta_ts);
291
292
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10 if (cat->cur_idx < ctx->nb_inputs) {
293 /* pad audio streams with silence */
294 6 str = cat->nb_streams[AVMEDIA_TYPE_VIDEO];
295 6 str_max = str + cat->nb_streams[AVMEDIA_TYPE_AUDIO];
296
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10 for (; str < str_max; str++) {
297 4 ret = send_silence(ctx, cat->cur_idx - ctx->nb_outputs + str, str,
298 seg_delta);
299
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4 if (ret < 0)
300 return ret;
301 }
302 }
303 10 return 0;
304 }
305
306 7 static av_cold int init(AVFilterContext *ctx)
307 {
308 7 ConcatContext *cat = ctx->priv;
309 unsigned seg, type, str;
310 int ret;
311
312 /* create input pads */
313
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25 for (seg = 0; seg < cat->nb_segments; seg++) {
314
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54 for (type = 0; type < TYPE_ALL; type++) {
315
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66 for (str = 0; str < cat->nb_streams[type]; str++) {
316 30 AVFilterPad pad = {
317 .type = type,
318 };
319
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30 if (type == AVMEDIA_TYPE_VIDEO)
320 18 pad.get_buffer.video = get_video_buffer;
321 else
322 12 pad.get_buffer.audio = get_audio_buffer;
323 30 pad.name = av_asprintf("in%d:%c%d", seg, "va"[type], str);
324
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30 if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
325 return ret;
326 }
327 }
328 }
329 /* create output pads */
330
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21 for (type = 0; type < TYPE_ALL; type++) {
331
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25 for (str = 0; str < cat->nb_streams[type]; str++) {
332 11 AVFilterPad pad = {
333 .type = type,
334 .config_props = config_output,
335 };
336 11 pad.name = av_asprintf("out:%c%d", "va"[type], str);
337
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11 if ((ret = ff_append_outpad_free_name(ctx, &pad)) < 0)
338 return ret;
339 }
340 }
341
342 7 cat->in = av_calloc(ctx->nb_inputs, sizeof(*cat->in));
343
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7 if (!cat->in)
344 return AVERROR(ENOMEM);
345 7 cat->nb_in_active = ctx->nb_outputs;
346 7 return 0;
347 }
348
349 7 static av_cold void uninit(AVFilterContext *ctx)
350 {
351 7 ConcatContext *cat = ctx->priv;
352
353 7 av_freep(&cat->in);
354 7 }
355
356 972 static int activate(AVFilterContext *ctx)
357 {
358 972 ConcatContext *cat = ctx->priv;
359 AVFrame *frame;
360 unsigned i, j;
361 int ret, status;
362 int64_t pts;
363
364 /* Forward status back */
365
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2774 for (i = 0; i < ctx->nb_outputs; i++) {
366 1802 status = ff_outlink_get_status(ctx->outputs[i]);
367
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1802 if (!status)
368 1771 continue;
369
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123 for (j = i; j < ctx->nb_inputs; j += ctx->nb_outputs) {
370
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92 if (!cat->in[j].eof) {
371 cat->in[j].eof = 1;
372 ff_inlink_set_status(ctx->inputs[j], status);
373 return 0;
374 }
375 }
376
377 }
378
379 /* Forward available frames */
380
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972 if (cat->cur_idx < ctx->nb_inputs) {
381
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2256 for (i = 0; i < ctx->nb_outputs; i++) {
382 1748 ret = ff_inlink_consume_frame(ctx->inputs[cat->cur_idx + i], &frame);
383
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1748 if (ret < 0)
384 return ret;
385
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1748 if (ret) {
386 463 ff_filter_set_ready(ctx, 10);
387 463 return push_frame(ctx, cat->cur_idx + i, frame);
388 }
389 }
390 }
391
392 /* Forward status change */
393
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509 if (cat->cur_idx < ctx->nb_inputs) {
394
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1421 for (i = 0; i < ctx->nb_outputs; i++) {
395 929 AVFilterLink *inlink = ctx->inputs[cat->cur_idx + i];
396
397 929 ret = ff_inlink_acknowledge_status(inlink, &status, &pts);
398 /* TODO use pts */
399
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929 if (ret > 0) {
400 16 close_input(ctx, cat->cur_idx + i);
401
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16 if (cat->cur_idx + ctx->nb_outputs >= ctx->nb_inputs) {
402 6 int64_t eof_pts = cat->delta_ts;
403
404 6 eof_pts += av_rescale_q(pts, inlink->time_base, ctx->outputs[i]->time_base);
405 6 ff_outlink_set_status(ctx->outputs[i], status, eof_pts);
406 }
407
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16 if (!cat->nb_in_active) {
408 10 ret = flush_segment(ctx);
409
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10 if (ret < 0)
410 return ret;
411 }
412 16 ff_filter_set_ready(ctx, 10);
413 16 return 0;
414 }
415 }
416 }
417
418 493 ret = FFERROR_NOT_READY;
419
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1195 for (i = 0; i < ctx->nb_outputs; i++) {
420
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810 if (ff_outlink_frame_wanted(ctx->outputs[i])) {
421
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477 if (cat->in[cat->cur_idx + i].eof) {
422
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324 for (j = 0; j < ctx->nb_outputs; j++)
423
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216 if (!cat->in[cat->cur_idx + j].eof)
424 108 ff_inlink_request_frame(ctx->inputs[cat->cur_idx + j]);
425 108 return 0;
426 } else {
427 369 ff_inlink_request_frame(ctx->inputs[cat->cur_idx + i]);
428 369 ret = 0;
429 }
430 }
431 }
432
433 385 return ret;
434 }
435
436 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
437 char *res, int res_len, int flags)
438 {
439 int ret = AVERROR(ENOSYS);
440
441 if (!strcmp(cmd, "next")) {
442 av_log(ctx, AV_LOG_VERBOSE, "Command received: next\n");
443 return flush_segment(ctx);
444 }
445
446 return ret;
447 }
448
449 const AVFilter ff_avf_concat = {
450 .name = "concat",
451 .description = NULL_IF_CONFIG_SMALL("Concatenate audio and video streams."),
452 .init = init,
453 .uninit = uninit,
454 .activate = activate,
455 .priv_size = sizeof(ConcatContext),
456 .inputs = NULL,
457 .outputs = NULL,
458 .priv_class = &concat_class,
459 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_DYNAMIC_OUTPUTS,
460 FILTER_QUERY_FUNC(query_formats),
461 .process_command = process_command,
462 };
463