FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/avf_concat.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 203 230 88.3%
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/mem.h"
29 #include "libavutil/opt.h"
30 #include "avfilter.h"
31 #include "filters.h"
32 #include "formats.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(const AVFilterContext *ctx,
76 AVFilterFormatsConfig **cfg_in,
77 AVFilterFormatsConfig **cfg_out)
78 {
79 4 const ConcatContext *cat = ctx->priv;
80 4 unsigned type, nb_str, idx0 = 0, idx, str, seg;
81 4 AVFilterFormats *formats, *rates = NULL;
82 4 AVFilterChannelLayouts *layouts = NULL;
83 int ret;
84
85
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 12 for (type = 0; type < TYPE_ALL; type++) {
86 8 nb_str = cat->nb_streams[type];
87
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 14 for (str = 0; str < nb_str; str++) {
88 6 idx = idx0;
89
90 /* Set the output formats */
91 6 formats = ff_all_formats(type);
92
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 6 if ((ret = ff_formats_ref(formats, &cfg_out[idx]->formats)) < 0)
93 ✗ return ret;
94
95
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 6 if (type == AVMEDIA_TYPE_AUDIO) {
96 2 rates = ff_all_samplerates();
97
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 2 if ((ret = ff_formats_ref(rates, &cfg_out[idx]->samplerates)) < 0)
98 ✗ return ret;
99 2 layouts = ff_all_channel_layouts();
100
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 2 if ((ret = ff_channel_layouts_ref(layouts, &cfg_out[idx]->channel_layouts)) < 0)
101 ✗ return ret;
102 }
103
104 /* Set the same formats for each corresponding input */
105
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 22 for (seg = 0; seg < cat->nb_segments; seg++) {
106
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 16 if ((ret = ff_formats_ref(formats, &cfg_in[idx]->formats)) < 0)
107 ✗ return ret;
108
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 16 if (type == AVMEDIA_TYPE_AUDIO) {
109
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 12 if ((ret = ff_formats_ref(rates, &cfg_in[idx]->samplerates)) < 0 ||
110 6 (ret = ff_channel_layouts_ref(layouts, &cfg_in[idx]->channel_layouts)) < 0)
111 ✗ return ret;
112 }
113 16 idx += ctx->nb_outputs;
114 }
115
116 6 idx0++;
117 }
118 }
119 4 return 0;
120 }
121
122 6 static int config_output(AVFilterLink *outlink)
123 {
124 6 FilterLink *outl = ff_filter_link(outlink);
125 6 AVFilterContext *ctx = outlink->src;
126 6 ConcatContext *cat = ctx->priv;
127 6 unsigned out_no = FF_OUTLINK_IDX(outlink);
128 6 unsigned in_no = out_no, seg;
129 6 AVFilterLink *inlink = ctx->inputs[in_no];
130 6 FilterLink *inl = ff_filter_link(inlink);
131
132 /* enhancement: find a common one */
133 6 outlink->time_base = AV_TIME_BASE_Q;
134 6 outlink->w = inlink->w;
135 6 outlink->h = inlink->h;
136 6 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
137 6 outlink->format = inlink->format;
138 6 outl->frame_rate = inl->frame_rate;
139
140
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 14 for (seg = 1; seg < cat->nb_segments; seg++) {
141 9 inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
142 9 inl = ff_filter_link(inlink);
143
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 9 if (outl->frame_rate.num != inl->frame_rate.num ||
144
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 8 outl->frame_rate.den != inl->frame_rate.den) {
145 1 av_log(ctx, AV_LOG_VERBOSE,
146 "Video inputs have different frame rates, output will be VFR\n");
147 1 outl->frame_rate = av_make_q(1, 0);
148 1 break;
149 }
150 }
151
152
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 16 for (seg = 1; seg < cat->nb_segments; seg++) {
153 10 inlink = ctx->inputs[in_no + seg * ctx->nb_outputs];
154
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 10 if (!outlink->sample_aspect_ratio.num)
155 5 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
156 /* possible enhancement: unsafe mode, do not check */
157
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 10 if (outlink->w != inlink->w ||
158
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 9 outlink->h != inlink->h ||
159
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 9 outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num &&
160 ✗ inlink->sample_aspect_ratio.num ||
161
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 9 outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
162 1 av_log(ctx, AV_LOG_ERROR, "Input link %s parameters "
163 "(size %dx%d, SAR %d:%d) do not match the corresponding "
164 "output link %s parameters (%dx%d, SAR %d:%d)\n",
165 1 ctx->input_pads[in_no].name, inlink->w, inlink->h,
166 inlink->sample_aspect_ratio.num,
167 inlink->sample_aspect_ratio.den,
168 1 ctx->input_pads[out_no].name, outlink->w, outlink->h,
169 outlink->sample_aspect_ratio.num,
170 outlink->sample_aspect_ratio.den);
171
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 1 if (!cat->unsafe)
172 ✗ return AVERROR(EINVAL);
173 }
174 }
175
176 6 return 0;
177 }
178
179 463 static int push_frame(AVFilterContext *ctx, unsigned in_no, AVFrame *buf)
180 {
181 463 ConcatContext *cat = ctx->priv;
182 463 unsigned out_no = in_no % ctx->nb_outputs;
183 463 AVFilterLink * inlink = ctx-> inputs[ in_no];
184 463 AVFilterLink *outlink = ctx->outputs[out_no];
185 463 struct concat_in *in = &cat->in[in_no];
186
187 463 buf->pts = av_rescale_q(buf->pts, inlink->time_base, outlink->time_base);
188 463 buf->duration = av_rescale_q(buf->duration, inlink->time_base, outlink->time_base);
189 463 in->pts = buf->pts;
190 463 in->nb_frames++;
191 /* add duration to input PTS */
192
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 463 if (inlink->sample_rate)
193 /* use number of audio samples */
194 350 in->pts += av_rescale_q(buf->nb_samples,
195 av_make_q(1, inlink->sample_rate),
196 outlink->time_base);
197
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 113 else if (in->nb_frames >= 2)
198 /* use mean duration */
199 103 in->pts = av_rescale(in->pts, in->nb_frames, in->nb_frames - 1);
200
201 463 buf->pts += cat->delta_ts;
202 463 return ff_filter_frame(outlink, buf);
203 }
204
205 63 static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h)
206 {
207 63 AVFilterContext *ctx = inlink->dst;
208 63 unsigned in_no = FF_INLINK_IDX(inlink);
209 63 AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
210
211 63 return ff_get_video_buffer(outlink, w, h);
212 }
213
214 350 static AVFrame *get_audio_buffer(AVFilterLink *inlink, int nb_samples)
215 {
216 350 AVFilterContext *ctx = inlink->dst;
217 350 unsigned in_no = FF_INLINK_IDX(inlink);
218 350 AVFilterLink *outlink = ctx->outputs[in_no % ctx->nb_outputs];
219
220 350 return ff_get_audio_buffer(outlink, nb_samples);
221 }
222
223 16 static void close_input(AVFilterContext *ctx, unsigned in_no)
224 {
225 16 ConcatContext *cat = ctx->priv;
226
227 16 cat->in[in_no].eof = 1;
228 16 cat->nb_in_active--;
229 16 av_log(ctx, AV_LOG_VERBOSE, "EOF on %s, %d streams left in segment.\n",
230 16 ctx->input_pads[in_no].name, cat->nb_in_active);
231 16 }
232
233 10 static void find_next_delta_ts(AVFilterContext *ctx, int64_t *seg_delta)
234 {
235 10 ConcatContext *cat = ctx->priv;
236 10 unsigned i = cat->cur_idx;
237 10 unsigned imax = i + ctx->nb_outputs;
238 int64_t pts;
239
240 10 pts = cat->in[i++].pts;
241
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 16 for (; i < imax; i++)
242 6 pts = FFMAX(pts, cat->in[i].pts);
243 10 cat->delta_ts += pts;
244 10 *seg_delta = pts;
245 10 }
246
247 4 static int send_silence(AVFilterContext *ctx, unsigned in_no, unsigned out_no,
248 int64_t seg_delta)
249 {
250 4 ConcatContext *cat = ctx->priv;
251 4 AVFilterLink *outlink = ctx->outputs[out_no];
252 4 int64_t base_pts = cat->in[in_no].pts + cat->delta_ts - seg_delta;
253 4 int64_t nb_samples, sent = 0;
254 int frame_nb_samples, ret;
255 4 AVRational rate_tb = { 1, ctx->inputs[in_no]->sample_rate };
256 AVFrame *buf;
257
258
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 4 if (!rate_tb.den)
259 ✗ return AVERROR_BUG;
260
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 4 if (cat->in[in_no].pts < INT64_MIN + seg_delta)
261 ✗ return AVERROR_INVALIDDATA;
262
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 4 if (seg_delta < cat->in[in_no].pts)
263 ✗ return AVERROR_INVALIDDATA;
264 4 nb_samples = av_rescale_q(seg_delta - cat->in[in_no].pts,
265 outlink->time_base, rate_tb);
266
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 4 frame_nb_samples = FFMAX(9600, rate_tb.den / 5); /* arbitrary */
267
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 14 while (nb_samples) {
268 10 frame_nb_samples = FFMIN(frame_nb_samples, nb_samples);
269 10 buf = ff_get_audio_buffer(outlink, frame_nb_samples);
270
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 10 if (!buf)
271 ✗ return AVERROR(ENOMEM);
272 10 av_samples_set_silence(buf->extended_data, 0, frame_nb_samples,
273 10 outlink->ch_layout.nb_channels, outlink->format);
274 10 buf->pts = base_pts + av_rescale_q(sent, rate_tb, outlink->time_base);
275 10 ret = ff_filter_frame(outlink, buf);
276
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 10 if (ret < 0)
277 ✗ return ret;
278 10 sent += frame_nb_samples;
279 10 nb_samples -= frame_nb_samples;
280 }
281 4 return 0;
282 }
283
284 10 static int flush_segment(AVFilterContext *ctx)
285 {
286 int ret;
287 10 ConcatContext *cat = ctx->priv;
288 unsigned str, str_max;
289 int64_t seg_delta;
290
291 10 find_next_delta_ts(ctx, &seg_delta);
292 10 cat->cur_idx += ctx->nb_outputs;
293 10 cat->nb_in_active = ctx->nb_outputs;
294 10 av_log(ctx, AV_LOG_VERBOSE, "Segment finished at pts=%"PRId64"\n",
295 cat->delta_ts);
296
297
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 10 if (cat->cur_idx < ctx->nb_inputs) {
298 /* pad audio streams with silence */
299 6 str = cat->nb_streams[AVMEDIA_TYPE_VIDEO];
300 6 str_max = str + cat->nb_streams[AVMEDIA_TYPE_AUDIO];
301
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 10 for (; str < str_max; str++) {
302 4 ret = send_silence(ctx, cat->cur_idx - ctx->nb_outputs + str, str,
303 seg_delta);
304
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 4 if (ret < 0)
305 ✗ return ret;
306 }
307 }
308 10 return 0;
309 }
310
311 7 static av_cold int init(AVFilterContext *ctx)
312 {
313 7 ConcatContext *cat = ctx->priv;
314 unsigned seg, type, str;
315 int ret;
316
317 /* create input pads */
318
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 25 for (seg = 0; seg < cat->nb_segments; seg++) {
319
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 54 for (type = 0; type < TYPE_ALL; type++) {
320
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 66 for (str = 0; str < cat->nb_streams[type]; str++) {
321 30 AVFilterPad pad = {
322 .type = type,
323 };
324
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 30 if (type == AVMEDIA_TYPE_VIDEO)
325 18 pad.get_buffer.video = get_video_buffer;
326 else
327 12 pad.get_buffer.audio = get_audio_buffer;
328 30 pad.name = av_asprintf("in%d:%c%d", seg, "va"[type], str);
329
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 30 if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
330 ✗ return ret;
331 }
332 }
333 }
334 /* create output pads */
335
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 21 for (type = 0; type < TYPE_ALL; type++) {
336
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 25 for (str = 0; str < cat->nb_streams[type]; str++) {
337 11 AVFilterPad pad = {
338 .type = type,
339 .config_props = config_output,
340 };
341 11 pad.name = av_asprintf("out:%c%d", "va"[type], str);
342
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 11 if ((ret = ff_append_outpad_free_name(ctx, &pad)) < 0)
343 ✗ return ret;
344 }
345 }
346
347 7 cat->in = av_calloc(ctx->nb_inputs, sizeof(*cat->in));
348
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 7 if (!cat->in)
349 ✗ return AVERROR(ENOMEM);
350 7 cat->nb_in_active = ctx->nb_outputs;
351 7 return 0;
352 }
353
354 7 static av_cold void uninit(AVFilterContext *ctx)
355 {
356 7 ConcatContext *cat = ctx->priv;
357
358 7 av_freep(&cat->in);
359 7 }
360
361 985 static int activate(AVFilterContext *ctx)
362 {
363 985 ConcatContext *cat = ctx->priv;
364 AVFrame *frame;
365 unsigned i, j;
366 int ret, status;
367 int64_t pts;
368
369 /* Forward status back */
370
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 2800 for (i = 0; i < ctx->nb_outputs; i++) {
371 1815 status = ff_outlink_get_status(ctx->outputs[i]);
372
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 1815 if (!status)
373 1784 continue;
374
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 123 for (j = i; j < ctx->nb_inputs; j += ctx->nb_outputs) {
375
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 92 if (!cat->in[j].eof) {
376 ✗ cat->in[j].eof = 1;
377 ✗ ff_inlink_set_status(ctx->inputs[j], status);
378 ✗ return 0;
379 }
380 }
381
382 }
383
384 /* Forward available frames */
385
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 985 if (cat->cur_idx < ctx->nb_inputs) {
386
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 2282 for (i = 0; i < ctx->nb_outputs; i++) {
387 1761 ret = ff_inlink_consume_frame(ctx->inputs[cat->cur_idx + i], &frame);
388
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 1761 if (ret < 0)
389 ✗ return ret;
390
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 1761 if (ret) {
391 463 ff_filter_set_ready(ctx, 10);
392 463 return push_frame(ctx, cat->cur_idx + i, frame);
393 }
394 }
395 }
396
397 /* Forward status change */
398
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 522 if (cat->cur_idx < ctx->nb_inputs) {
399
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 1447 for (i = 0; i < ctx->nb_outputs; i++) {
400 942 AVFilterLink *inlink = ctx->inputs[cat->cur_idx + i];
401
402 942 ret = ff_inlink_acknowledge_status(inlink, &status, &pts);
403 /* TODO use pts */
404
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 942 if (ret > 0) {
405 16 close_input(ctx, cat->cur_idx + i);
406
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 16 if (cat->cur_idx + ctx->nb_outputs >= ctx->nb_inputs) {
407 6 int64_t eof_pts = cat->delta_ts;
408
409 6 eof_pts += av_rescale_q(pts, inlink->time_base, ctx->outputs[i]->time_base);
410 6 ff_outlink_set_status(ctx->outputs[i], status, eof_pts);
411 }
412
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 16 if (!cat->nb_in_active) {
413 10 ret = flush_segment(ctx);
414
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 10 if (ret < 0)
415 ✗ return ret;
416 }
417 16 ff_filter_set_ready(ctx, 10);
418 16 return 0;
419 }
420 }
421 }
422
423 506 ret = FFERROR_NOT_READY;
424
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 1221 for (i = 0; i < ctx->nb_outputs; i++) {
425
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 823 if (ff_outlink_frame_wanted(ctx->outputs[i])) {
426
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 477 if (cat->in[cat->cur_idx + i].eof) {
427
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 324 for (j = 0; j < ctx->nb_outputs; j++)
428
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 216 if (!cat->in[cat->cur_idx + j].eof)
429 108 ff_inlink_request_frame(ctx->inputs[cat->cur_idx + j]);
430 108 return 0;
431 } else {
432 369 ff_inlink_request_frame(ctx->inputs[cat->cur_idx + i]);
433 369 ret = 0;
434 }
435 }
436 }
437
438 398 return ret;
439 }
440
441 ✗ static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
442 char *res, int res_len, int flags)
443 {
444 ✗ int ret = AVERROR(ENOSYS);
445
446 ✗ if (!strcmp(cmd, "next")) {
447 ✗ av_log(ctx, AV_LOG_VERBOSE, "Command received: next\n");
448 ✗ return flush_segment(ctx);
449 }
450
451 ✗ return ret;
452 }
453
454 const AVFilter ff_avf_concat = {
455 .name = "concat",
456 .description = NULL_IF_CONFIG_SMALL("Concatenate audio and video streams."),
457 .init = init,
458 .uninit = uninit,
459 .activate = activate,
460 .priv_size = sizeof(ConcatContext),
461 .inputs = NULL,
462 .outputs = NULL,
463 .priv_class = &concat_class,
464 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_DYNAMIC_OUTPUTS,
465 FILTER_QUERY_FUNC2(query_formats),
466 .process_command = process_command,
467 };
468