FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/framesync.c
Date: 2023-09-24 13:02:57
Exec Total Coverage
Lines: 196 235 83.4%
Functions: 16 18 88.9%
Branches: 129 188 68.6%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2013 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 License
8 * 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
14 * 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 #include "libavutil/avassert.h"
22 #include "libavutil/opt.h"
23 #include "avfilter.h"
24 #include "filters.h"
25 #include "framesync.h"
26 #include "internal.h"
27
28 #define OFFSET(member) offsetof(FFFrameSync, member)
29 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
30
31 ✗ static const char *framesync_name(void *ptr)
32 {
33 ✗ return "framesync";
34 }
35
36 static const AVOption framesync_options[] = {
37 { "eof_action", "Action to take when encountering EOF from secondary input ",
38 OFFSET(opt_eof_action), AV_OPT_TYPE_INT, { .i64 = EOF_ACTION_REPEAT },
39 EOF_ACTION_REPEAT, EOF_ACTION_PASS, .flags = FLAGS, "eof_action" },
40 { "repeat", "Repeat the previous frame.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_REPEAT }, .flags = FLAGS, "eof_action" },
41 { "endall", "End both streams.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_ENDALL }, .flags = FLAGS, "eof_action" },
42 { "pass", "Pass through the main input.", 0, AV_OPT_TYPE_CONST, { .i64 = EOF_ACTION_PASS }, .flags = FLAGS, "eof_action" },
43 { "shortest", "force termination when the shortest input terminates", OFFSET(opt_shortest), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS },
44 { "repeatlast", "extend last frame of secondary streams beyond EOF", OFFSET(opt_repeatlast), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
45 { "ts_sync_mode", "How strictly to sync streams based on secondary input timestamps",
46 OFFSET(opt_ts_sync_mode), AV_OPT_TYPE_INT, { .i64 = TS_DEFAULT },
47 TS_DEFAULT, TS_NEAREST, .flags = FLAGS, "ts_sync_mode" },
48 { "default", "Frame from secondary input with the nearest lower or equal timestamp to the primary input frame",
49 0, AV_OPT_TYPE_CONST, { .i64 = TS_DEFAULT }, .flags = FLAGS, "ts_sync_mode" },
50 { "nearest", "Frame from secondary input with the absolute nearest timestamp to the primary input frame",
51 0, AV_OPT_TYPE_CONST, { .i64 = TS_NEAREST }, .flags = FLAGS, "ts_sync_mode" },
52 { NULL }
53 };
54 static const AVClass framesync_class = {
55 .version = LIBAVUTIL_VERSION_INT,
56 .class_name = "framesync",
57 .item_name = framesync_name,
58 .category = AV_CLASS_CATEGORY_FILTER,
59 .option = framesync_options,
60 .parent_log_context_offset = OFFSET(parent),
61 };
62
63 ✗ const AVClass *ff_framesync_child_class_iterate(void **iter)
64 {
65 ✗ const AVClass *c = *iter ? NULL : &framesync_class;
66 ✗ *iter = (void *)(uintptr_t)c;
67 ✗ return c;
68 }
69
70 enum {
71 STATE_BOF,
72 STATE_RUN,
73 STATE_EOF,
74 };
75
76 static int consume_from_fifos(FFFrameSync *fs);
77
78 112 void ff_framesync_preinit(FFFrameSync *fs)
79 {
80
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 112 if (fs->class)
81 35 return;
82 77 fs->class = &framesync_class;
83 77 av_opt_set_defaults(fs);
84 }
85
86 42 int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
87 {
88 /* For filters with several outputs, we will not be able to assume which
89 output is relevant for ff_outlink_frame_wanted() and
90 ff_outlink_set_status(). To be designed when needed. */
91
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 42 av_assert0(parent->nb_outputs == 1);
92
93 42 ff_framesync_preinit(fs);
94 42 fs->parent = parent;
95 42 fs->nb_in = nb_in;
96
97 42 fs->in = av_calloc(nb_in, sizeof(*fs->in));
98
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 42 if (!fs->in)
99 ✗ return AVERROR(ENOMEM);
100 42 return 0;
101 }
102
103 64 static void framesync_eof(FFFrameSync *fs)
104 {
105 64 fs->eof = 1;
106 64 fs->frame_ready = 0;
107 64 ff_outlink_set_status(fs->parent->outputs[0], AVERROR_EOF, AV_NOPTS_VALUE);
108 64 }
109
110 115 static void framesync_sync_level_update(FFFrameSync *fs)
111 {
112 115 unsigned i, level = 0;
113
114
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 343 for (i = 0; i < fs->nb_in; i++)
115
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 228 if (fs->in[i].state != STATE_EOF)
116 228 level = FFMAX(level, fs->in[i].sync);
117
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 115 av_assert0(level <= fs->sync_level);
118
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 115 if (level < fs->sync_level)
119 92 av_log(fs, AV_LOG_VERBOSE, "Sync level %u\n", level);
120
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 115 if (fs->opt_ts_sync_mode > TS_DEFAULT) {
121 ✗ for (i = 0; i < fs->nb_in; i++) {
122 ✗ if (fs->in[i].sync < level)
123 ✗ fs->in[i].ts_mode = fs->opt_ts_sync_mode;
124 else
125 ✗ fs->in[i].ts_mode = TS_DEFAULT;
126 }
127 }
128
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 115 if (level)
129 83 fs->sync_level = level;
130 else
131 32 framesync_eof(fs);
132 115 }
133
134 42 int ff_framesync_configure(FFFrameSync *fs)
135 {
136 unsigned i;
137
138
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 42 if (!fs->opt_repeatlast || fs->opt_eof_action == EOF_ACTION_PASS) {
139 ✗ fs->opt_repeatlast = 0;
140 ✗ fs->opt_eof_action = EOF_ACTION_PASS;
141 }
142
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 42 if (fs->opt_shortest || fs->opt_eof_action == EOF_ACTION_ENDALL) {
143 ✗ fs->opt_shortest = 1;
144 ✗ fs->opt_eof_action = EOF_ACTION_ENDALL;
145 }
146
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 42 if (!fs->opt_repeatlast) {
147 ✗ for (i = 1; i < fs->nb_in; i++) {
148 ✗ fs->in[i].after = EXT_NULL;
149 ✗ fs->in[i].sync = 0;
150 }
151 }
152
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 42 if (fs->opt_shortest) {
153 ✗ for (i = 0; i < fs->nb_in; i++)
154 ✗ fs->in[i].after = EXT_STOP;
155 }
156
157
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 42 if (!fs->time_base.num) {
158
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 125 for (i = 0; i < fs->nb_in; i++) {
159
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 83 if (fs->in[i].sync) {
160
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 83 if (fs->time_base.num) {
161 41 fs->time_base = av_gcd_q(fs->time_base, fs->in[i].time_base,
162 41 AV_TIME_BASE / 2, AV_TIME_BASE_Q);
163 } else {
164 42 fs->time_base = fs->in[i].time_base;
165 }
166 }
167 }
168
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 42 if (!fs->time_base.num) {
169 ✗ av_log(fs, AV_LOG_ERROR, "Impossible to set time base\n");
170 ✗ return AVERROR(EINVAL);
171 }
172 42 av_log(fs, AV_LOG_VERBOSE, "Selected %d/%d time base\n",
173 fs->time_base.num, fs->time_base.den);
174 }
175
176
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 125 for (i = 0; i < fs->nb_in; i++)
177 83 fs->in[i].pts = fs->in[i].pts_next = AV_NOPTS_VALUE;
178 42 fs->sync_level = UINT_MAX;
179 42 framesync_sync_level_update(fs);
180
181 42 return 0;
182 }
183
184 3662 static int framesync_advance(FFFrameSync *fs)
185 {
186 unsigned i;
187 int64_t pts;
188 int ret;
189
190
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 5279 while (!(fs->frame_ready || fs->eof)) {
191 3875 ret = consume_from_fifos(fs);
192
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 3875 if (ret <= 0)
193 2227 return ret;
194
195 1648 pts = INT64_MAX;
196
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 4893 for (i = 0; i < fs->nb_in; i++)
197
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 3245 if (fs->in[i].have_next && fs->in[i].pts_next < pts)
198 1843 pts = fs->in[i].pts_next;
199
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 1648 if (pts == INT64_MAX) {
200 31 framesync_eof(fs);
201 31 break;
202 }
203
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 4800 for (i = 0; i < fs->nb_in; i++) {
204
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 3183 if (fs->in[i].pts_next == pts ||
205
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 844 (fs->in[i].ts_mode == TS_NEAREST &&
206 ✗ fs->in[i].have_next &&
207 ✗ fs->in[i].pts_next != INT64_MAX && fs->in[i].pts != AV_NOPTS_VALUE &&
208 ✗ fs->in[i].pts_next - pts < pts - fs->in[i].pts) ||
209
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 844 (fs->in[i].before == EXT_INFINITY &&
210
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 280 fs->in[i].state == STATE_BOF)) {
211 2339 av_frame_free(&fs->in[i].frame);
212 2339 fs->in[i].frame = fs->in[i].frame_next;
213 2339 fs->in[i].pts = fs->in[i].pts_next;
214 2339 fs->in[i].frame_next = NULL;
215 2339 fs->in[i].pts_next = AV_NOPTS_VALUE;
216 2339 fs->in[i].have_next = 0;
217
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 2339 fs->in[i].state = fs->in[i].frame ? STATE_RUN : STATE_EOF;
218
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 2339 if (fs->in[i].sync == fs->sync_level && fs->in[i].frame)
219 1490 fs->frame_ready = 1;
220
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 2339 if (fs->in[i].state == STATE_EOF &&
221
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 1 fs->in[i].after == EXT_STOP)
222 1 framesync_eof(fs);
223 }
224 }
225
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 1617 if (fs->frame_ready)
226
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 4120 for (i = 0; i < fs->nb_in; i++)
227
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 2730 if ((fs->in[i].state == STATE_BOF &&
228
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 4 fs->in[i].before == EXT_STOP))
229 ✗ fs->frame_ready = 0;
230 1617 fs->pts = pts;
231 }
232 1435 return 0;
233 }
234
235 1 static int64_t framesync_pts_extrapolate(FFFrameSync *fs, unsigned in,
236 int64_t pts)
237 {
238 /* Possible enhancement: use the link's frame rate */
239 1 return pts + 1;
240 }
241
242 2338 static void framesync_inject_frame(FFFrameSync *fs, unsigned in, AVFrame *frame)
243 {
244 int64_t pts;
245
246
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 2338 av_assert0(!fs->in[in].have_next);
247
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 2338 av_assert0(frame);
248 2338 pts = av_rescale_q(frame->pts, fs->in[in].time_base, fs->time_base);
249 2338 frame->pts = pts;
250 2338 fs->in[in].frame_next = frame;
251 2338 fs->in[in].pts_next = pts;
252 2338 fs->in[in].have_next = 1;
253 2338 }
254
255 73 static void framesync_inject_status(FFFrameSync *fs, unsigned in, int status, int64_t pts)
256 {
257
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 73 av_assert0(!fs->in[in].have_next);
258
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 73 pts = fs->in[in].state != STATE_RUN || fs->in[in].after == EXT_INFINITY
259
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 146 ? INT64_MAX : framesync_pts_extrapolate(fs, in, fs->in[in].pts);
260 73 fs->in[in].sync = 0;
261 73 framesync_sync_level_update(fs);
262 73 fs->in[in].frame_next = NULL;
263 73 fs->in[in].pts_next = pts;
264 73 fs->in[in].have_next = 1;
265 73 }
266
267 2730 int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe,
268 unsigned get)
269 {
270 AVFrame *frame;
271 2730 unsigned need_copy = 0, i;
272 int64_t pts_next;
273 int ret;
274
275
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 2730 if (!fs->in[in].frame) {
276 4 *rframe = NULL;
277 4 return 0;
278 }
279 2726 frame = fs->in[in].frame;
280
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 2726 if (get) {
281 /* Find out if we need to copy the frame: is there another sync
282 stream, and do we know if its current frame will outlast this one? */
283
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 1240 pts_next = fs->in[in].have_next ? fs->in[in].pts_next : INT64_MAX;
284
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 3720 for (i = 0; i < fs->nb_in && !need_copy; i++)
285
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 2480 if (i != in && fs->in[i].sync &&
286
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 940 (!fs->in[i].have_next || fs->in[i].pts_next < pts_next))
287 940 need_copy = 1;
288
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 1240 if (need_copy) {
289
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 940 if (!(frame = av_frame_clone(frame)))
290 ✗ return AVERROR(ENOMEM);
291
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 940 if ((ret = ff_inlink_make_frame_writable(fs->parent->inputs[in], &frame) < 0)) {
292 ✗ av_frame_free(&frame);
293 ✗ return ret;
294 }
295 } else {
296 300 fs->in[in].frame = NULL;
297 }
298 1240 fs->frame_ready = 0;
299 }
300 2726 *rframe = frame;
301 2726 return 0;
302 }
303
304 86 void ff_framesync_uninit(FFFrameSync *fs)
305 {
306 unsigned i;
307
308
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 169 for (i = 0; i < fs->nb_in; i++) {
309 83 av_frame_free(&fs->in[i].frame);
310 83 av_frame_free(&fs->in[i].frame_next);
311 }
312
313 86 av_freep(&fs->in);
314 86 }
315
316 3875 static int consume_from_fifos(FFFrameSync *fs)
317 {
318 3875 AVFilterContext *ctx = fs->parent;
319 3875 AVFrame *frame = NULL;
320 int64_t pts;
321 unsigned i, nb_active, nb_miss;
322 int ret, status;
323
324 3875 nb_active = nb_miss = 0;
325
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 11524 for (i = 0; i < fs->nb_in; i++) {
326
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 7649 if (fs->in[i].have_next || fs->in[i].state == STATE_EOF)
327 2198 continue;
328 5451 nb_active++;
329 5451 ret = ff_inlink_consume_frame(ctx->inputs[i], &frame);
330
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 5451 if (ret < 0)
331 ✗ return ret;
332
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 5451 if (ret) {
333
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 2338 av_assert0(frame);
334 2338 framesync_inject_frame(fs, i, frame);
335 } else {
336 3113 ret = ff_inlink_acknowledge_status(ctx->inputs[i], &status, &pts);
337
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 3113 if (ret > 0) {
338 73 framesync_inject_status(fs, i, status, pts);
339
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 3040 } else if (!ret) {
340 3040 nb_miss++;
341 }
342 }
343 }
344
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 3875 if (nb_miss) {
345
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 2227 if (nb_miss == nb_active && !ff_outlink_frame_wanted(ctx->outputs[0]))
346 2 return FFERROR_NOT_READY;
347
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 6625 for (i = 0; i < fs->nb_in; i++)
348
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 4400 if (!fs->in[i].have_next && fs->in[i].state != STATE_EOF)
349 3038 ff_inlink_request_frame(ctx->inputs[i]);
350 2225 return 0;
351 }
352 1648 return 1;
353 }
354
355 3662 int ff_framesync_activate(FFFrameSync *fs)
356 {
357 int ret;
358
359 3662 ret = framesync_advance(fs);
360
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 3662 if (ret < 0)
361 2 return ret;
362
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 3660 if (fs->eof || !fs->frame_ready)
363 2270 return 0;
364 1390 ret = fs->on_event(fs);
365
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 1390 if (ret < 0)
366 ✗ return ret;
367 1390 fs->frame_ready = 0;
368
369 1390 return 0;
370 }
371
372 39 int ff_framesync_init_dualinput(FFFrameSync *fs, AVFilterContext *parent)
373 {
374 int ret;
375
376 39 ret = ff_framesync_init(fs, parent, 2);
377
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 39 if (ret < 0)
378 ✗ return ret;
379 39 fs->in[0].time_base = parent->inputs[0]->time_base;
380 39 fs->in[1].time_base = parent->inputs[1]->time_base;
381 39 fs->in[0].sync = 2;
382 39 fs->in[0].before = EXT_STOP;
383 39 fs->in[0].after = EXT_INFINITY;
384 39 fs->in[1].sync = 1;
385 39 fs->in[1].before = EXT_NULL;
386 39 fs->in[1].after = EXT_INFINITY;
387 39 return 0;
388 }
389
390 1240 int ff_framesync_dualinput_get(FFFrameSync *fs, AVFrame **f0, AVFrame **f1)
391 {
392 1240 AVFilterContext *ctx = fs->parent;
393 1240 AVFrame *mainpic = NULL, *secondpic = NULL;
394 int ret;
395
396
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 2480 if ((ret = ff_framesync_get_frame(fs, 0, &mainpic, 1)) < 0 ||
397 1240 (ret = ff_framesync_get_frame(fs, 1, &secondpic, 0)) < 0) {
398 ✗ av_frame_free(&mainpic);
399 ✗ return ret;
400 }
401
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 1240 av_assert0(mainpic);
402 1240 mainpic->pts = av_rescale_q(fs->pts, fs->time_base, ctx->outputs[0]->time_base);
403
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 1240 if (ctx->is_disabled)
404 ✗ secondpic = NULL;
405 1240 *f0 = mainpic;
406 1240 *f1 = secondpic;
407 1240 return 0;
408 }
409
410 1216 int ff_framesync_dualinput_get_writable(FFFrameSync *fs, AVFrame **f0, AVFrame **f1)
411 {
412 int ret;
413
414 1216 ret = ff_framesync_dualinput_get(fs, f0, f1);
415
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 1216 if (ret < 0)
416 ✗ return ret;
417 1216 ret = ff_inlink_make_frame_writable(fs->parent->inputs[0], f0);
418
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 1216 if (ret < 0) {
419 ✗ av_frame_free(f0);
420 ✗ *f1 = NULL;
421 ✗ return ret;
422 }
423 1216 return 0;
424 }
425