FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/fftools/sync_queue.c
Date: 2024-04-20 14:10:07
Exec Total Coverage
Lines: 309 329 93.9%
Functions: 21 21 100.0%
Branches: 223 266 83.8%

Line Branch Exec Source
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include <stdint.h>
20 #include <string.h>
21
22 #include "libavutil/avassert.h"
23 #include "libavutil/channel_layout.h"
24 #include "libavutil/cpu.h"
25 #include "libavutil/error.h"
26 #include "libavutil/fifo.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/mem.h"
29 #include "libavutil/samplefmt.h"
30 #include "libavutil/timestamp.h"
31
32 #include "objpool.h"
33 #include "sync_queue.h"
34
35 /*
36 * How this works:
37 * --------------
38 * time: 0 1 2 3 4 5 6 7 8 9 10 11 12 13
39 * -------------------------------------------------------------------
40 * | | | | | | | | | | | | | |
41 * | ┌───┐┌────────┐┌───┐┌─────────────┐
42 * stream 0| │d=1││ d=2 ││d=1││ d=3 │
43 * | └───┘└────────┘└───┘└─────────────┘
44 * ┌───┐ ┌───────────────────────┐
45 * stream 1│d=1│ │ d=5 │
46 * └───┘ └───────────────────────┘
47 * | ┌───┐┌───┐┌───┐┌───┐
48 * stream 2| │d=1││d=1││d=1││d=1│ <- stream 2 is the head stream of the queue
49 * | └───┘└───┘└───┘└───┘
50 * ^ ^
51 * [stream 2 tail] [stream 2 head]
52 *
53 * We have N streams (N=3 in the diagram), each stream is a FIFO. The *tail* of
54 * each FIFO is the frame with smallest end time, the *head* is the frame with
55 * the largest end time. Frames submitted to the queue with sq_send() are placed
56 * after the head, frames returned to the caller with sq_receive() are taken
57 * from the tail.
58 *
59 * The head stream of the whole queue (SyncQueue.head_stream) is the limiting
60 * stream with the *smallest* head timestamp, i.e. the stream whose source lags
61 * furthest behind all other streams. It determines which frames can be output
62 * from the queue.
63 *
64 * In the diagram, the head stream is 2, because it head time is t=5, while
65 * streams 0 and 1 end at t=8 and t=9 respectively. All frames that _end_ at
66 * or before t=5 can be output, i.e. the first 3 frames from stream 0, first
67 * frame from stream 1, and all 4 frames from stream 2.
68 */
69
70 typedef struct SyncQueueStream {
71 AVFifo *fifo;
72 AVRational tb;
73
74 /* number of audio samples in fifo */
75 uint64_t samples_queued;
76 /* stream head: largest timestamp seen */
77 int64_t head_ts;
78 int limiting;
79 /* no more frames will be sent for this stream */
80 int finished;
81
82 uint64_t frames_sent;
83 uint64_t samples_sent;
84 uint64_t frames_max;
85 int frame_samples;
86 } SyncQueueStream;
87
88 struct SyncQueue {
89 enum SyncQueueType type;
90
91 void *logctx;
92
93 /* no more frames will be sent for any stream */
94 int finished;
95 /* sync head: the stream with the _smallest_ head timestamp
96 * this stream determines which frames can be output */
97 int head_stream;
98 /* the finished stream with the smallest finish timestamp or -1 */
99 int head_finished_stream;
100
101 // maximum buffering duration in microseconds
102 int64_t buf_size_us;
103
104 SyncQueueStream *streams;
105 unsigned int nb_streams;
106
107 // pool of preallocated frames to avoid constant allocations
108 ObjPool *pool;
109
110 int have_limiting;
111
112 uintptr_t align_mask;
113 };
114
115 48121 static void frame_move(const SyncQueue *sq, SyncQueueFrame dst,
116 SyncQueueFrame src)
117 {
118
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48121 if (sq->type == SYNC_QUEUE_PACKETS)
119 1538 av_packet_move_ref(dst.p, src.p);
120 else
121 46583 av_frame_move_ref(dst.f, src.f);
122 48121 }
123
124 /**
125 * Compute the end timestamp of a frame. If nb_samples is provided, consider
126 * the frame to have this number of audio samples, otherwise use frame duration.
127 */
128 213444 static int64_t frame_end(const SyncQueue *sq, SyncQueueFrame frame, int nb_samples)
129 {
130
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213444 if (nb_samples) {
131 70696 int64_t d = av_rescale_q(nb_samples, (AVRational){ 1, frame.f->sample_rate},
132 70696 frame.f->time_base);
133 70696 return frame.f->pts + d;
134 }
135
136 142748 return (sq->type == SYNC_QUEUE_PACKETS) ?
137
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281432 frame.p->pts + frame.p->duration :
138 138684 frame.f->pts + frame.f->duration;
139 }
140
141 64465 static int frame_samples(const SyncQueue *sq, SyncQueueFrame frame)
142 {
143
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64465 return (sq->type == SYNC_QUEUE_PACKETS) ? 0 : frame.f->nb_samples;
144 }
145
146 34795 static int frame_null(const SyncQueue *sq, SyncQueueFrame frame)
147 {
148
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34795 return (sq->type == SYNC_QUEUE_PACKETS) ? (frame.p == NULL) : (frame.f == NULL);
149 }
150
151 31777 static void tb_update(const SyncQueue *sq, SyncQueueStream *st,
152 const SyncQueueFrame frame)
153 {
154 63554 AVRational tb = (sq->type == SYNC_QUEUE_PACKETS) ?
155
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31777 frame.p->time_base : frame.f->time_base;
156
157
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31777 av_assert0(tb.num > 0 && tb.den > 0);
158
159
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31777 if (tb.num == st->tb.num && tb.den == st->tb.den)
160 28935 return;
161
162 // timebase should not change after the first frame
163
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2842 av_assert0(!av_fifo_can_read(st->fifo));
164
165
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2842 if (st->head_ts != AV_NOPTS_VALUE)
166 1 st->head_ts = av_rescale_q(st->head_ts, st->tb, tb);
167
168 2842 st->tb = tb;
169 }
170
171 5674 static void finish_stream(SyncQueue *sq, unsigned int stream_idx)
172 {
173 5674 SyncQueueStream *st = &sq->streams[stream_idx];
174
175
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5674 if (!st->finished)
176 2853 av_log(sq->logctx, AV_LOG_DEBUG,
177 "sq: finish %u; head ts %s\n", stream_idx,
178 2853 av_ts2timestr(st->head_ts, &st->tb));
179
180 5674 st->finished = 1;
181
182
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5674 if (st->limiting && st->head_ts != AV_NOPTS_VALUE) {
183 /* check if this stream is the new finished head */
184
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7980 if (sq->head_finished_stream < 0 ||
185 2659 av_compare_ts(st->head_ts, st->tb,
186 2659 sq->streams[sq->head_finished_stream].head_ts,
187 2659 sq->streams[sq->head_finished_stream].tb) < 0) {
188 2663 sq->head_finished_stream = stream_idx;
189 }
190
191 /* mark as finished all streams that should no longer receive new frames,
192 * due to them being ahead of some finished stream */
193 5321 st = &sq->streams[sq->head_finished_stream];
194
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10658 for (unsigned int i = 0; i < sq->nb_streams; i++) {
195 5337 SyncQueueStream *st1 = &sq->streams[i];
196
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5352 if (st != st1 && st1->head_ts != AV_NOPTS_VALUE &&
197 15 av_compare_ts(st->head_ts, st->tb, st1->head_ts, st1->tb) <= 0) {
198
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10 if (!st1->finished)
199 3 av_log(sq->logctx, AV_LOG_DEBUG,
200 "sq: finish secondary %u; head ts %s\n", i,
201 3 av_ts2timestr(st1->head_ts, &st1->tb));
202
203 10 st1->finished = 1;
204 }
205 }
206 }
207
208 /* mark the whole queue as finished if all streams are finished */
209
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11670 for (unsigned int i = 0; i < sq->nb_streams; i++) {
210
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6064 if (!sq->streams[i].finished)
211 68 return;
212 }
213 5606 sq->finished = 1;
214
215 5606 av_log(sq->logctx, AV_LOG_DEBUG, "sq: finish queue\n");
216 }
217
218 11455 static void queue_head_update(SyncQueue *sq)
219 {
220
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11455 av_assert0(sq->have_limiting);
221
222
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11455 if (sq->head_stream < 0) {
223 2718 unsigned first_limiting = UINT_MAX;
224
225 /* wait for one timestamp in each stream before determining
226 * the queue head */
227
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5444 for (unsigned int i = 0; i < sq->nb_streams; i++) {
228 2782 SyncQueueStream *st = &sq->streams[i];
229
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2782 if (!st->limiting)
230 4 continue;
231
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2778 if (st->head_ts == AV_NOPTS_VALUE)
232 56 return;
233
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2722 if (first_limiting == UINT_MAX)
234 2718 first_limiting = i;
235 }
236
237 // placeholder value, correct one will be found below
238
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2662 av_assert0(first_limiting < UINT_MAX);
239 2662 sq->head_stream = first_limiting;
240 }
241
242
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23170 for (unsigned int i = 0; i < sq->nb_streams; i++) {
243 11771 SyncQueueStream *st_head = &sq->streams[sq->head_stream];
244 11771 SyncQueueStream *st_other = &sq->streams[i];
245
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23508 if (st_other->limiting && st_other->head_ts != AV_NOPTS_VALUE &&
246 11737 av_compare_ts(st_other->head_ts, st_other->tb,
247 st_head->head_ts, st_head->tb) < 0)
248 11 sq->head_stream = i;
249 }
250 }
251
252 /* update this stream's head timestamp */
253 31871 static void stream_update_ts(SyncQueue *sq, unsigned int stream_idx, int64_t ts)
254 {
255 31871 SyncQueueStream *st = &sq->streams[stream_idx];
256
257
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31871 if (ts == AV_NOPTS_VALUE ||
258
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31868 (st->head_ts != AV_NOPTS_VALUE && st->head_ts >= ts))
259 25 return;
260
261 31846 st->head_ts = ts;
262
263 /* if this stream is now ahead of some finished stream, then
264 * this stream is also finished */
265
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31968 if (sq->head_finished_stream >= 0 &&
266 122 av_compare_ts(sq->streams[sq->head_finished_stream].head_ts,
267 122 sq->streams[sq->head_finished_stream].tb,
268 ts, st->tb) <= 0)
269 4 finish_stream(sq, stream_idx);
270
271 /* update the overall head timestamp if it could have changed */
272
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31846 if (st->limiting &&
273
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11953 (sq->head_stream < 0 || sq->head_stream == stream_idx))
274 11455 queue_head_update(sq);
275 }
276
277 /* If the queue for the given stream (or all streams when stream_idx=-1)
278 * is overflowing, trigger a fake heartbeat on lagging streams.
279 *
280 * @return 1 if heartbeat triggered, 0 otherwise
281 */
282 29281 static int overflow_heartbeat(SyncQueue *sq, int stream_idx)
283 {
284 SyncQueueStream *st;
285 SyncQueueFrame frame;
286 29281 int64_t tail_ts = AV_NOPTS_VALUE;
287
288 /* if no stream specified, pick the one that is most ahead */
289
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29281 if (stream_idx < 0) {
290 29281 int64_t ts = AV_NOPTS_VALUE;
291
292
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62360 for (int i = 0; i < sq->nb_streams; i++) {
293 33079 st = &sq->streams[i];
294
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33079 if (st->head_ts != AV_NOPTS_VALUE &&
295
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3377 (ts == AV_NOPTS_VALUE ||
296 3377 av_compare_ts(ts, sq->streams[stream_idx].tb,
297 st->head_ts, st->tb) < 0)) {
298 29804 ts = st->head_ts;
299 29804 stream_idx = i;
300 }
301 }
302 /* no stream has a timestamp yet -> nothing to do */
303
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29281 if (stream_idx < 0)
304 return 0;
305 }
306
307 29281 st = &sq->streams[stream_idx];
308
309 /* get the chosen stream's tail timestamp */
310
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73854 for (size_t i = 0; tail_ts == AV_NOPTS_VALUE &&
311 44573 av_fifo_peek(st->fifo, &frame, 1, i) >= 0; i++)
312 15292 tail_ts = frame_end(sq, frame, 0);
313
314 /* overflow triggers when the tail is over specified duration behind the head */
315
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29281 if (tail_ts == AV_NOPTS_VALUE || tail_ts >= st->head_ts ||
316
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1380 av_rescale_q(st->head_ts - tail_ts, st->tb, AV_TIME_BASE_Q) < sq->buf_size_us)
317 29187 return 0;
318
319 /* signal a fake timestamp for all streams that prevent tail_ts from being output */
320 94 tail_ts++;
321
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282 for (unsigned int i = 0; i < sq->nb_streams; i++) {
322 188 const SyncQueueStream *st1 = &sq->streams[i];
323 int64_t ts;
324
325
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188 if (st == st1 || st1->finished ||
326
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187 (st1->head_ts != AV_NOPTS_VALUE &&
327 93 av_compare_ts(tail_ts, st->tb, st1->head_ts, st1->tb) <= 0))
328 94 continue;
329
330 94 ts = av_rescale_q(tail_ts, st->tb, st1->tb);
331
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94 if (st1->head_ts != AV_NOPTS_VALUE)
332
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93 ts = FFMAX(st1->head_ts + 1, ts);
333
334 94 av_log(sq->logctx, AV_LOG_DEBUG, "sq: %u overflow heardbeat %s -> %s\n",
335 94 i, av_ts2timestr(st1->head_ts, &st1->tb), av_ts2timestr(ts, &st1->tb));
336
337 94 stream_update_ts(sq, i, ts);
338 }
339
340 94 return 1;
341 }
342
343 34795 int sq_send(SyncQueue *sq, unsigned int stream_idx, SyncQueueFrame frame)
344 {
345 SyncQueueStream *st;
346 SyncQueueFrame dst;
347 int64_t ts;
348 int ret, nb_samples;
349
350
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34795 av_assert0(stream_idx < sq->nb_streams);
351 34795 st = &sq->streams[stream_idx];
352
353
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34795 if (frame_null(sq, frame)) {
354 3002 av_log(sq->logctx, AV_LOG_DEBUG, "sq: %u EOF\n", stream_idx);
355 3002 finish_stream(sq, stream_idx);
356 3002 return 0;
357 }
358
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31793 if (st->finished)
359 16 return AVERROR_EOF;
360
361 31777 tb_update(sq, st, frame);
362
363 31777 ret = objpool_get(sq->pool, (void**)&dst);
364
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31777 if (ret < 0)
365 return ret;
366
367 31777 frame_move(sq, dst, frame);
368
369 31777 nb_samples = frame_samples(sq, dst);
370 // make sure frame duration is consistent with sample count
371
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31777 if (nb_samples) {
372
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23876 av_assert0(dst.f->sample_rate > 0);
373 23876 dst.f->duration = av_rescale_q(nb_samples, (AVRational){ 1, dst.f->sample_rate },
374 23876 dst.f->time_base);
375 }
376
377 31777 ts = frame_end(sq, dst, 0);
378
379 31777 av_log(sq->logctx, AV_LOG_DEBUG, "sq: send %u ts %s\n", stream_idx,
380 31777 av_ts2timestr(ts, &st->tb));
381
382 31777 ret = av_fifo_write(st->fifo, &dst, 1);
383
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31777 if (ret < 0) {
384 frame_move(sq, frame, dst);
385 objpool_release(sq->pool, (void**)&dst);
386 return ret;
387 }
388
389 31777 stream_update_ts(sq, stream_idx, ts);
390
391 31777 st->samples_queued += nb_samples;
392 31777 st->samples_sent += nb_samples;
393
394
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31777 if (st->frame_samples)
395 19778 st->frames_sent = st->samples_sent / st->frame_samples;
396 else
397 11999 st->frames_sent++;
398
399
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31777 if (st->frames_sent >= st->frames_max) {
400 2654 av_log(sq->logctx, AV_LOG_DEBUG, "sq: %u frames_max %"PRIu64" reached\n",
401 stream_idx, st->frames_max);
402
403 2654 finish_stream(sq, stream_idx);
404 }
405
406 31777 return 0;
407 }
408
409 64967 static void offset_audio(AVFrame *f, int nb_samples)
410 {
411 64967 const int planar = av_sample_fmt_is_planar(f->format);
412
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64967 const int planes = planar ? f->ch_layout.nb_channels : 1;
413 64967 const int bps = av_get_bytes_per_sample(f->format);
414
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64967 const int offset = nb_samples * bps * (planar ? 1 : f->ch_layout.nb_channels);
415
416
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64967 av_assert0(bps > 0);
417
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64967 av_assert0(nb_samples < f->nb_samples);
418
419
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158720 for (int i = 0; i < planes; i++) {
420 93753 f->extended_data[i] += offset;
421
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93753 if (i < FF_ARRAY_ELEMS(f->data))
422 93753 f->data[i] = f->extended_data[i];
423 }
424 64967 f->linesize[0] -= offset;
425 64967 f->nb_samples -= nb_samples;
426 64967 f->duration = av_rescale_q(f->nb_samples, (AVRational){ 1, f->sample_rate },
427 f->time_base);
428 64967 f->pts += av_rescale_q(nb_samples, (AVRational){ 1, f->sample_rate },
429 f->time_base);
430 64967 }
431
432 56982 static int frame_is_aligned(const SyncQueue *sq, const AVFrame *frame)
433 {
434 // only checks linesize[0], so only works for audio
435
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56982 av_assert0(frame->nb_samples > 0);
436
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56982 av_assert0(sq->align_mask);
437
438 // only check data[0], because we always offset all data pointers
439 // by the same offset, so if one is aligned, all are
440
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56982 if (!((uintptr_t)frame->data[0] & sq->align_mask) &&
441
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56434 !(frame->linesize[0] & sq->align_mask) &&
442
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56434 frame->linesize[0] > sq->align_mask)
443 56434 return 1;
444
445 548 return 0;
446 }
447
448 66240 static int receive_samples(SyncQueue *sq, SyncQueueStream *st,
449 AVFrame *dst, int nb_samples)
450 {
451 SyncQueueFrame src;
452 int ret;
453
454
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66240 av_assert0(st->samples_queued >= nb_samples);
455
456 66240 ret = av_fifo_peek(st->fifo, &src, 1, 0);
457
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66240 av_assert0(ret >= 0);
458
459 // peeked frame has enough samples and its data is aligned
460 // -> we can just make a reference and limit its sample count
461
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66240 if (src.f->nb_samples > nb_samples && frame_is_aligned(sq, src.f)) {
462 52041 ret = av_frame_ref(dst, src.f);
463
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52041 if (ret < 0)
464 return ret;
465
466 52041 dst->nb_samples = nb_samples;
467 52041 offset_audio(src.f, nb_samples);
468 52041 st->samples_queued -= nb_samples;
469
470 52041 goto finish;
471 }
472
473 // otherwise allocate a new frame and copy the data
474 14199 ret = av_channel_layout_copy(&dst->ch_layout, &src.f->ch_layout);
475
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14199 if (ret < 0)
476 return ret;
477
478 14199 dst->format = src.f->format;
479 14199 dst->nb_samples = nb_samples;
480
481 14199 ret = av_frame_get_buffer(dst, 0);
482
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14199 if (ret < 0)
483 goto fail;
484
485 14199 ret = av_frame_copy_props(dst, src.f);
486
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14199 if (ret < 0)
487 goto fail;
488
489 14199 dst->nb_samples = 0;
490
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42506 while (dst->nb_samples < nb_samples) {
491 int to_copy;
492
493 28307 ret = av_fifo_peek(st->fifo, &src, 1, 0);
494
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28307 av_assert0(ret >= 0);
495
496 28307 to_copy = FFMIN(nb_samples - dst->nb_samples, src.f->nb_samples);
497
498 28307 av_samples_copy(dst->extended_data, src.f->extended_data, dst->nb_samples,
499 28307 0, to_copy, dst->ch_layout.nb_channels, dst->format);
500
501
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28307 if (to_copy < src.f->nb_samples)
502 12926 offset_audio(src.f, to_copy);
503 else {
504 15381 av_frame_unref(src.f);
505 15381 objpool_release(sq->pool, (void**)&src);
506 15381 av_fifo_drain2(st->fifo, 1);
507 }
508 28307 st->samples_queued -= to_copy;
509
510 28307 dst->nb_samples += to_copy;
511 }
512
513 14199 finish:
514 66240 dst->duration = av_rescale_q(nb_samples, (AVRational){ 1, dst->sample_rate },
515 dst->time_base);
516
517 66240 return 0;
518
519 fail:
520 av_frame_unref(dst);
521 return ret;
522 }
523
524 123168 static int receive_for_stream(SyncQueue *sq, unsigned int stream_idx,
525 SyncQueueFrame frame)
526 {
527 246336 const SyncQueueStream *st_head = sq->head_stream >= 0 ?
528
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123168 &sq->streams[sq->head_stream] : NULL;
529 SyncQueueStream *st;
530
531
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123168 av_assert0(stream_idx < sq->nb_streams);
532 123168 st = &sq->streams[stream_idx];
533
534
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123168 if (av_fifo_can_read(st->fifo) &&
535
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100585 (st->frame_samples <= st->samples_queued || st->finished)) {
536 83791 int nb_samples = st->frame_samples;
537 SyncQueueFrame peek;
538 int64_t ts;
539 83791 int cmp = 1;
540
541
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83791 if (st->finished)
542 3113 nb_samples = FFMIN(nb_samples, st->samples_queued);
543
544 83791 av_fifo_peek(st->fifo, &peek, 1, 0);
545 83791 ts = frame_end(sq, peek, nb_samples);
546
547 /* check if this stream's tail timestamp does not overtake
548 * the overall queue head */
549
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83791 if (ts != AV_NOPTS_VALUE && st_head)
550 12933 cmp = av_compare_ts(ts, st->tb, st_head->head_ts, st_head->tb);
551
552 /* We can release frames that do not end after the queue head.
553 * Frames with no timestamps are just passed through with no conditions.
554 * Frames are also passed through when there are no limiting streams.
555 */
556
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83791 if (cmp <= 0 || ts == AV_NOPTS_VALUE || !sq->have_limiting) {
557
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82584 if (nb_samples &&
558
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136873 (nb_samples != peek.f->nb_samples || !frame_is_aligned(sq, peek.f))) {
559 66240 int ret = receive_samples(sq, st, frame.f, nb_samples);
560
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66240 if (ret < 0)
561 return ret;
562 } else {
563 16344 frame_move(sq, frame, peek);
564 16344 objpool_release(sq->pool, (void**)&peek);
565 16344 av_fifo_drain2(st->fifo, 1);
566
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16344 av_assert0(st->samples_queued >= frame_samples(sq, frame));
567 16344 st->samples_queued -= frame_samples(sq, frame);
568 }
569
570
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165168 av_log(sq->logctx, AV_LOG_DEBUG,
571 "sq: receive %u ts %s queue head %d ts %s\n", stream_idx,
572 82584 av_ts2timestr(frame_end(sq, frame, 0), &st->tb),
573 sq->head_stream,
574 11784 st_head ? av_ts2timestr(st_head->head_ts, &st_head->tb) : "N/A");
575
576 82584 return 0;
577 }
578 }
579
580
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34713 return (sq->finished || (st->finished && !av_fifo_can_read(st->fifo))) ?
581
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75297 AVERROR_EOF : AVERROR(EAGAIN);
582 }
583
584 117457 static int receive_internal(SyncQueue *sq, int stream_idx, SyncQueueFrame frame)
585 {
586 117457 int nb_eof = 0;
587 int ret;
588
589 /* read a frame for a specific stream */
590
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117457 if (stream_idx >= 0) {
591 ret = receive_for_stream(sq, stream_idx, frame);
592 return (ret < 0) ? ret : stream_idx;
593 }
594
595 /* read a frame for any stream with available output */
596
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158041 for (unsigned int i = 0; i < sq->nb_streams; i++) {
597 123168 ret = receive_for_stream(sq, i, frame);
598
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123168 if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN)) {
599 40584 nb_eof += (ret == AVERROR_EOF);
600 40584 continue;
601 }
602
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82584 return (ret < 0) ? ret : i;
603 }
604
605
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34873 return (nb_eof == sq->nb_streams) ? AVERROR_EOF : AVERROR(EAGAIN);
606 }
607
608 117363 int sq_receive(SyncQueue *sq, int stream_idx, SyncQueueFrame frame)
609 {
610 117363 int ret = receive_internal(sq, stream_idx, frame);
611
612 /* try again if the queue overflowed and triggered a fake heartbeat
613 * for lagging streams */
614
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117363 if (ret == AVERROR(EAGAIN) && overflow_heartbeat(sq, stream_idx))
615 94 ret = receive_internal(sq, stream_idx, frame);
616
617 117363 return ret;
618 }
619
620 2856 int sq_add_stream(SyncQueue *sq, int limiting)
621 {
622 SyncQueueStream *tmp, *st;
623
624 2856 tmp = av_realloc_array(sq->streams, sq->nb_streams + 1, sizeof(*sq->streams));
625
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2856 if (!tmp)
626 return AVERROR(ENOMEM);
627 2856 sq->streams = tmp;
628
629 2856 st = &sq->streams[sq->nb_streams];
630 2856 memset(st, 0, sizeof(*st));
631
632 2856 st->fifo = av_fifo_alloc2(1, sizeof(SyncQueueFrame), AV_FIFO_FLAG_AUTO_GROW);
633
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2856 if (!st->fifo)
634 return AVERROR(ENOMEM);
635
636 /* we set a valid default, so that a pathological stream that never
637 * receives even a real timebase (and no frames) won't stall all other
638 * streams forever; cf. overflow_heartbeat() */
639 2856 st->tb = (AVRational){ 1, 1 };
640 2856 st->head_ts = AV_NOPTS_VALUE;
641 2856 st->frames_max = UINT64_MAX;
642 2856 st->limiting = limiting;
643
644 2856 sq->have_limiting |= limiting;
645
646 2856 return sq->nb_streams++;
647 }
648
649 2670 void sq_limit_frames(SyncQueue *sq, unsigned int stream_idx, uint64_t frames)
650 {
651 SyncQueueStream *st;
652
653
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2670 av_assert0(stream_idx < sq->nb_streams);
654 2670 st = &sq->streams[stream_idx];
655
656 2670 st->frames_max = frames;
657
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2670 if (st->frames_sent >= st->frames_max)
658 14 finish_stream(sq, stream_idx);
659 2670 }
660
661 156 void sq_frame_samples(SyncQueue *sq, unsigned int stream_idx,
662 int frame_samples)
663 {
664 SyncQueueStream *st;
665
666
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156 av_assert0(sq->type == SYNC_QUEUE_FRAMES);
667
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156 av_assert0(stream_idx < sq->nb_streams);
668 156 st = &sq->streams[stream_idx];
669
670 156 st->frame_samples = frame_samples;
671
672 156 sq->align_mask = av_cpu_max_align() - 1;
673 156 }
674
675 2789 SyncQueue *sq_alloc(enum SyncQueueType type, int64_t buf_size_us, void *logctx)
676 {
677 2789 SyncQueue *sq = av_mallocz(sizeof(*sq));
678
679
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2789 if (!sq)
680 return NULL;
681
682 2789 sq->type = type;
683 2789 sq->buf_size_us = buf_size_us;
684 2789 sq->logctx = logctx;
685
686 2789 sq->head_stream = -1;
687 2789 sq->head_finished_stream = -1;
688
689
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2789 sq->pool = (type == SYNC_QUEUE_PACKETS) ? objpool_alloc_packets() :
690 2776 objpool_alloc_frames();
691
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2789 if (!sq->pool) {
692 av_freep(&sq);
693 return NULL;
694 }
695
696 2789 return sq;
697 }
698
699 9534 void sq_free(SyncQueue **psq)
700 {
701 9534 SyncQueue *sq = *psq;
702
703
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9534 if (!sq)
704 6745 return;
705
706
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5645 for (unsigned int i = 0; i < sq->nb_streams; i++) {
707 SyncQueueFrame frame;
708
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2908 while (av_fifo_read(sq->streams[i].fifo, &frame, 1) >= 0)
709 52 objpool_release(sq->pool, (void**)&frame);
710
711 2856 av_fifo_freep2(&sq->streams[i].fifo);
712 }
713
714 2789 av_freep(&sq->streams);
715
716 2789 objpool_free(&sq->pool);
717
718 2789 av_freep(psq);
719 }
720