1 /*
2 * muxing functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "avformat.h"
23 #include "internal.h"
24 #include "mux.h"
25 #include "version.h"
26 #include "libavcodec/bsf.h"
27 #include "libavcodec/internal.h"
28 #include "libavcodec/packet_internal.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/dict.h"
31 #include "libavutil/timestamp.h"
32 #include "libavutil/avassert.h"
33 #include "libavutil/internal.h"
34 #include "libavutil/mathematics.h"
35
36 /**
37 * @file
38 * muxing functions for use within libavformat
39 */
40
41 /* fraction handling */
42
43 /**
44 * f = val + (num / den) + 0.5.
45 *
46 * 'num' is normalized so that it is such as 0 <= num < den.
47 *
48 * @param f fractional number
49 * @param val integer value
50 * @param num must be >= 0
51 * @param den must be >= 1
52 */
frac_init(FFFrac * f,int64_t val,int64_t num,int64_t den)53 static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
54 {
55 num += (den >> 1);
56 if (num >= den) {
57 val += num / den;
58 num = num % den;
59 }
60 f->val = val;
61 f->num = num;
62 f->den = den;
63 }
64
65 /**
66 * Fractional addition to f: f = f + (incr / f->den).
67 *
68 * @param f fractional number
69 * @param incr increment, can be positive or negative
70 */
frac_add(FFFrac * f,int64_t incr)71 static void frac_add(FFFrac *f, int64_t incr)
72 {
73 int64_t num, den;
74
75 num = f->num + incr;
76 den = f->den;
77 if (num < 0) {
78 f->val += num / den;
79 num = num % den;
80 if (num < 0) {
81 num += den;
82 f->val--;
83 }
84 } else if (num >= den) {
85 f->val += num / den;
86 num = num % den;
87 }
88 f->num = num;
89 }
90
avformat_alloc_output_context2(AVFormatContext ** avctx,const AVOutputFormat * oformat,const char * format,const char * filename)91 int avformat_alloc_output_context2(AVFormatContext **avctx, const AVOutputFormat *oformat,
92 const char *format, const char *filename)
93 {
94 AVFormatContext *s = avformat_alloc_context();
95 int ret = 0;
96
97 *avctx = NULL;
98 if (!s)
99 goto nomem;
100
101 if (!oformat) {
102 if (format) {
103 oformat = av_guess_format(format, NULL, NULL);
104 if (!oformat) {
105 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
106 ret = AVERROR(EINVAL);
107 goto error;
108 }
109 } else {
110 oformat = av_guess_format(NULL, filename, NULL);
111 if (!oformat) {
112 ret = AVERROR(EINVAL);
113 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
114 filename);
115 goto error;
116 }
117 }
118 }
119
120 s->oformat = oformat;
121 if (s->oformat->priv_data_size > 0) {
122 s->priv_data = av_mallocz(s->oformat->priv_data_size);
123 if (!s->priv_data)
124 goto nomem;
125 if (s->oformat->priv_class) {
126 *(const AVClass**)s->priv_data= s->oformat->priv_class;
127 av_opt_set_defaults(s->priv_data);
128 }
129 } else
130 s->priv_data = NULL;
131
132 if (filename) {
133 if (!(s->url = av_strdup(filename)))
134 goto nomem;
135
136 }
137 *avctx = s;
138 return 0;
139 nomem:
140 av_log(s, AV_LOG_ERROR, "Out of memory\n");
141 ret = AVERROR(ENOMEM);
142 error:
143 avformat_free_context(s);
144 return ret;
145 }
146
validate_codec_tag(AVFormatContext * s,AVStream * st)147 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
148 {
149 const AVCodecTag *avctag;
150 enum AVCodecID id = AV_CODEC_ID_NONE;
151 int64_t tag = -1;
152
153 /**
154 * Check that tag + id is in the table
155 * If neither is in the table -> OK
156 * If tag is in the table with another id -> FAIL
157 * If id is in the table with another tag -> FAIL unless strict < normal
158 */
159 for (int n = 0; s->oformat->codec_tag[n]; n++) {
160 avctag = s->oformat->codec_tag[n];
161 while (avctag->id != AV_CODEC_ID_NONE) {
162 if (ff_toupper4(avctag->tag) == ff_toupper4(st->codecpar->codec_tag)) {
163 id = avctag->id;
164 if (id == st->codecpar->codec_id)
165 return 1;
166 }
167 if (avctag->id == st->codecpar->codec_id)
168 tag = avctag->tag;
169 avctag++;
170 }
171 }
172 if (id != AV_CODEC_ID_NONE)
173 return 0;
174 if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
175 return 0;
176 return 1;
177 }
178
179
init_muxer(AVFormatContext * s,AVDictionary ** options)180 static int init_muxer(AVFormatContext *s, AVDictionary **options)
181 {
182 FFFormatContext *const si = ffformatcontext(s);
183 AVDictionary *tmp = NULL;
184 const AVOutputFormat *of = s->oformat;
185 AVDictionaryEntry *e;
186 int ret = 0;
187
188 if (options)
189 av_dict_copy(&tmp, *options, 0);
190
191 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
192 goto fail;
193 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
194 (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
195 goto fail;
196
197 if (!s->url && !(s->url = av_strdup(""))) {
198 ret = AVERROR(ENOMEM);
199 goto fail;
200 }
201
202 // some sanity checks
203 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
204 av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
205 ret = AVERROR(EINVAL);
206 goto fail;
207 }
208
209 for (unsigned i = 0; i < s->nb_streams; i++) {
210 AVStream *const st = s->streams[i];
211 FFStream *const sti = ffstream(st);
212 AVCodecParameters *const par = st->codecpar;
213 const AVCodecDescriptor *desc;
214
215 if (!st->time_base.num) {
216 /* fall back on the default timebase values */
217 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
218 avpriv_set_pts_info(st, 64, 1, par->sample_rate);
219 else
220 avpriv_set_pts_info(st, 33, 1, 90000);
221 }
222
223 switch (par->codec_type) {
224 case AVMEDIA_TYPE_AUDIO:
225 if (par->sample_rate <= 0) {
226 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
227 ret = AVERROR(EINVAL);
228 goto fail;
229 }
230
231 #if FF_API_OLD_CHANNEL_LAYOUT
232 FF_DISABLE_DEPRECATION_WARNINGS
233 /* if the caller is using the deprecated channel layout API,
234 * convert it to the new style */
235 if (!par->ch_layout.nb_channels &&
236 par->channels) {
237 if (par->channel_layout) {
238 av_channel_layout_from_mask(&par->ch_layout, par->channel_layout);
239 } else {
240 par->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
241 par->ch_layout.nb_channels = par->channels;
242 }
243 }
244 FF_ENABLE_DEPRECATION_WARNINGS
245 #endif
246
247 if (!par->block_align)
248 par->block_align = par->ch_layout.nb_channels *
249 av_get_bits_per_sample(par->codec_id) >> 3;
250 break;
251 case AVMEDIA_TYPE_VIDEO:
252 if ((par->width <= 0 || par->height <= 0) &&
253 !(of->flags & AVFMT_NODIMENSIONS)) {
254 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
255 ret = AVERROR(EINVAL);
256 goto fail;
257 }
258 if (av_cmp_q(st->sample_aspect_ratio, par->sample_aspect_ratio)
259 && fabs(av_q2d(st->sample_aspect_ratio) - av_q2d(par->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
260 ) {
261 if (st->sample_aspect_ratio.num != 0 &&
262 st->sample_aspect_ratio.den != 0 &&
263 par->sample_aspect_ratio.num != 0 &&
264 par->sample_aspect_ratio.den != 0) {
265 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
266 "(%d/%d) and encoder layer (%d/%d)\n",
267 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
268 par->sample_aspect_ratio.num,
269 par->sample_aspect_ratio.den);
270 ret = AVERROR(EINVAL);
271 goto fail;
272 }
273 }
274 break;
275 }
276
277 desc = avcodec_descriptor_get(par->codec_id);
278 if (desc && desc->props & AV_CODEC_PROP_REORDER)
279 sti->reorder = 1;
280
281 sti->is_intra_only = ff_is_intra_only(par->codec_id);
282
283 if (of->codec_tag) {
284 if ( par->codec_tag
285 && par->codec_id == AV_CODEC_ID_RAWVIDEO
286 && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
287 || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
288 && !validate_codec_tag(s, st)) {
289 // the current rawvideo encoding system ends up setting
290 // the wrong codec_tag for avi/mov, we override it here
291 par->codec_tag = 0;
292 }
293 if (par->codec_tag) {
294 if (!validate_codec_tag(s, st)) {
295 const uint32_t otag = av_codec_get_tag(s->oformat->codec_tag, par->codec_id);
296 av_log(s, AV_LOG_ERROR,
297 "Tag %s incompatible with output codec id '%d' (%s)\n",
298 av_fourcc2str(par->codec_tag), par->codec_id, av_fourcc2str(otag));
299 ret = AVERROR_INVALIDDATA;
300 goto fail;
301 }
302 } else
303 par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
304 }
305
306 if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT)
307 si->nb_interleaved_streams++;
308 }
309 si->interleave_packet = of->interleave_packet;
310 if (!si->interleave_packet)
311 si->interleave_packet = si->nb_interleaved_streams > 1 ?
312 ff_interleave_packet_per_dts :
313 ff_interleave_packet_passthrough;
314
315 if (!s->priv_data && of->priv_data_size > 0) {
316 s->priv_data = av_mallocz(of->priv_data_size);
317 if (!s->priv_data) {
318 ret = AVERROR(ENOMEM);
319 goto fail;
320 }
321 if (of->priv_class) {
322 *(const AVClass **)s->priv_data = of->priv_class;
323 av_opt_set_defaults(s->priv_data);
324 if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
325 goto fail;
326 }
327 }
328
329 /* set muxer identification string */
330 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
331 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
332 } else {
333 av_dict_set(&s->metadata, "encoder", NULL, 0);
334 }
335
336 for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
337 av_dict_set(&s->metadata, e->key, NULL, 0);
338 }
339
340 if (options) {
341 av_dict_free(options);
342 *options = tmp;
343 }
344
345 if (s->oformat->init) {
346 if ((ret = s->oformat->init(s)) < 0) {
347 if (s->oformat->deinit)
348 s->oformat->deinit(s);
349 return ret;
350 }
351 return ret == 0;
352 }
353
354 return 0;
355
356 fail:
357 av_dict_free(&tmp);
358 return ret;
359 }
360
init_pts(AVFormatContext * s)361 static int init_pts(AVFormatContext *s)
362 {
363 FFFormatContext *const si = ffformatcontext(s);
364
365 /* init PTS generation */
366 for (unsigned i = 0; i < s->nb_streams; i++) {
367 AVStream *const st = s->streams[i];
368 FFStream *const sti = ffstream(st);
369 int64_t den = AV_NOPTS_VALUE;
370
371 switch (st->codecpar->codec_type) {
372 case AVMEDIA_TYPE_AUDIO:
373 den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
374 break;
375 case AVMEDIA_TYPE_VIDEO:
376 den = (int64_t)st->time_base.num * st->time_base.den;
377 break;
378 default:
379 break;
380 }
381
382 if (!sti->priv_pts)
383 sti->priv_pts = av_mallocz(sizeof(*sti->priv_pts));
384 if (!sti->priv_pts)
385 return AVERROR(ENOMEM);
386
387 if (den != AV_NOPTS_VALUE) {
388 if (den <= 0)
389 return AVERROR_INVALIDDATA;
390
391 frac_init(sti->priv_pts, 0, 0, den);
392 }
393 }
394
395 si->avoid_negative_ts_status = AVOID_NEGATIVE_TS_UNKNOWN;
396 if (s->avoid_negative_ts < 0) {
397 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
398 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
399 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_DISABLED;
400 si->avoid_negative_ts_status = AVOID_NEGATIVE_TS_DISABLED;
401 } else
402 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
403 } else if (s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_DISABLED)
404 si->avoid_negative_ts_status = AVOID_NEGATIVE_TS_DISABLED;
405
406 return 0;
407 }
408
flush_if_needed(AVFormatContext * s)409 static void flush_if_needed(AVFormatContext *s)
410 {
411 if (s->pb && s->pb->error >= 0) {
412 if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
413 avio_flush(s->pb);
414 else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
415 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
416 }
417 }
418
deinit_muxer(AVFormatContext * s)419 static void deinit_muxer(AVFormatContext *s)
420 {
421 FFFormatContext *const si = ffformatcontext(s);
422 if (s->oformat && s->oformat->deinit && si->initialized)
423 s->oformat->deinit(s);
424 si->initialized =
425 si->streams_initialized = 0;
426 }
427
avformat_init_output(AVFormatContext * s,AVDictionary ** options)428 int avformat_init_output(AVFormatContext *s, AVDictionary **options)
429 {
430 FFFormatContext *const si = ffformatcontext(s);
431 int ret = 0;
432
433 if ((ret = init_muxer(s, options)) < 0)
434 return ret;
435
436 si->initialized = 1;
437 si->streams_initialized = ret;
438
439 if (s->oformat->init && ret) {
440 if ((ret = init_pts(s)) < 0)
441 return ret;
442
443 return AVSTREAM_INIT_IN_INIT_OUTPUT;
444 }
445
446 return AVSTREAM_INIT_IN_WRITE_HEADER;
447 }
448
avformat_write_header(AVFormatContext * s,AVDictionary ** options)449 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
450 {
451 FFFormatContext *const si = ffformatcontext(s);
452 int already_initialized = si->initialized;
453 int streams_already_initialized = si->streams_initialized;
454 int ret = 0;
455
456 if (!already_initialized)
457 if ((ret = avformat_init_output(s, options)) < 0)
458 return ret;
459
460 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
461 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_HEADER);
462 if (s->oformat->write_header) {
463 ret = s->oformat->write_header(s);
464 if (ret >= 0 && s->pb && s->pb->error < 0)
465 ret = s->pb->error;
466 if (ret < 0)
467 goto fail;
468 flush_if_needed(s);
469 }
470 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
471 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_UNKNOWN);
472
473 if (!si->streams_initialized) {
474 if ((ret = init_pts(s)) < 0)
475 goto fail;
476 }
477
478 return streams_already_initialized;
479
480 fail:
481 deinit_muxer(s);
482 return ret;
483 }
484
485 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
486
487
488 #if FF_API_COMPUTE_PKT_FIELDS2
489 FF_DISABLE_DEPRECATION_WARNINGS
490 //FIXME merge with compute_pkt_fields
compute_muxer_pkt_fields(AVFormatContext * s,AVStream * st,AVPacket * pkt)491 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
492 {
493 FFFormatContext *const si = ffformatcontext(s);
494 FFStream *const sti = ffstream(st);
495 int delay = st->codecpar->video_delay;
496 int frame_size;
497
498 if (!si->missing_ts_warning &&
499 !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
500 (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC) || (st->disposition & AV_DISPOSITION_TIMED_THUMBNAILS)) &&
501 (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
502 av_log(s, AV_LOG_WARNING,
503 "Timestamps are unset in a packet for stream %d. "
504 "This is deprecated and will stop working in the future. "
505 "Fix your code to set the timestamps properly\n", st->index);
506 si->missing_ts_warning = 1;
507 }
508
509 if (s->debug & FF_FDEBUG_TS)
510 av_log(s, AV_LOG_DEBUG, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
511 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(sti->cur_dts), delay, pkt->size, pkt->stream_index);
512
513 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
514 pkt->pts = pkt->dts;
515
516 //XXX/FIXME this is a temporary hack until all encoders output pts
517 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
518 static int warned;
519 if (!warned) {
520 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
521 warned = 1;
522 }
523 pkt->dts =
524 // pkt->pts= st->cur_dts;
525 pkt->pts = sti->priv_pts->val;
526 }
527
528 //calculate dts from pts
529 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
530 sti->pts_buffer[0] = pkt->pts;
531 for (int i = 1; i < delay + 1 && sti->pts_buffer[i] == AV_NOPTS_VALUE; i++)
532 sti->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
533 for (int i = 0; i<delay && sti->pts_buffer[i] > sti->pts_buffer[i + 1]; i++)
534 FFSWAP(int64_t, sti->pts_buffer[i], sti->pts_buffer[i + 1]);
535
536 pkt->dts = sti->pts_buffer[0];
537 }
538
539 if (sti->cur_dts && sti->cur_dts != AV_NOPTS_VALUE &&
540 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
541 st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE &&
542 st->codecpar->codec_type != AVMEDIA_TYPE_DATA &&
543 sti->cur_dts >= pkt->dts) || sti->cur_dts > pkt->dts)) {
544 av_log(s, AV_LOG_ERROR,
545 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
546 st->index, av_ts2str(sti->cur_dts), av_ts2str(pkt->dts));
547 return AVERROR(EINVAL);
548 }
549 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
550 av_log(s, AV_LOG_ERROR,
551 "pts (%s) < dts (%s) in stream %d\n",
552 av_ts2str(pkt->pts), av_ts2str(pkt->dts),
553 st->index);
554 return AVERROR(EINVAL);
555 }
556
557 if (s->debug & FF_FDEBUG_TS)
558 av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%s dts2:%s\n",
559 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
560
561 sti->cur_dts = pkt->dts;
562 sti->priv_pts->val = pkt->dts;
563
564 /* update pts */
565 switch (st->codecpar->codec_type) {
566 case AVMEDIA_TYPE_AUDIO:
567 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
568 (*(AVFrame **)pkt->data)->nb_samples :
569 av_get_audio_frame_duration2(st->codecpar, pkt->size);
570
571 /* HACK/FIXME, we skip the initial 0 size packets as they are most
572 * likely equal to the encoder delay, but it would be better if we
573 * had the real timestamps from the encoder */
574 if (frame_size >= 0 && (pkt->size || sti->priv_pts->num != sti->priv_pts->den >> 1 || sti->priv_pts->val)) {
575 frac_add(sti->priv_pts, (int64_t)st->time_base.den * frame_size);
576 }
577 break;
578 case AVMEDIA_TYPE_VIDEO:
579 frac_add(sti->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
580 break;
581 }
582 return 0;
583 }
584 FF_ENABLE_DEPRECATION_WARNINGS
585 #endif
586
guess_pkt_duration(AVFormatContext * s,AVStream * st,AVPacket * pkt)587 static void guess_pkt_duration(AVFormatContext *s, AVStream *st, AVPacket *pkt)
588 {
589 if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
590 av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
591 pkt->duration, pkt->stream_index);
592 pkt->duration = 0;
593 }
594
595 if (pkt->duration)
596 return;
597
598 switch (st->codecpar->codec_type) {
599 case AVMEDIA_TYPE_VIDEO:
600 if (st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0) {
601 pkt->duration = av_rescale_q(1, av_inv_q(st->avg_frame_rate),
602 st->time_base);
603 } else if (st->time_base.num * 1000LL > st->time_base.den)
604 pkt->duration = 1;
605 break;
606 case AVMEDIA_TYPE_AUDIO: {
607 int frame_size = av_get_audio_frame_duration2(st->codecpar, pkt->size);
608 if (frame_size && st->codecpar->sample_rate) {
609 pkt->duration = av_rescale_q(frame_size,
610 (AVRational){1, st->codecpar->sample_rate},
611 st->time_base);
612 }
613 break;
614 }
615 }
616 }
617
handle_avoid_negative_ts(FFFormatContext * si,FFStream * sti,AVPacket * pkt)618 static void handle_avoid_negative_ts(FFFormatContext *si, FFStream *sti,
619 AVPacket *pkt)
620 {
621 AVFormatContext *const s = &si->pub;
622 int64_t offset;
623
624 if (!AVOID_NEGATIVE_TS_ENABLED(si->avoid_negative_ts_status))
625 return;
626
627 if (si->avoid_negative_ts_status == AVOID_NEGATIVE_TS_UNKNOWN) {
628 int use_pts = si->avoid_negative_ts_use_pts;
629 int64_t ts = use_pts ? pkt->pts : pkt->dts;
630 AVRational tb = sti->pub.time_base;
631
632 if (ts == AV_NOPTS_VALUE)
633 return;
634
635 /* Peek into the muxing queue to improve our estimate
636 * of the lowest timestamp if av_interleaved_write_frame() is used. */
637 for (const PacketListEntry *pktl = si->packet_buffer.head;
638 pktl; pktl = pktl->next) {
639 AVRational cmp_tb = s->streams[pktl->pkt.stream_index]->time_base;
640 int64_t cmp_ts = use_pts ? pktl->pkt.pts : pktl->pkt.dts;
641 if (cmp_ts == AV_NOPTS_VALUE)
642 continue;
643 if (s->output_ts_offset)
644 cmp_ts += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, cmp_tb);
645 if (av_compare_ts(cmp_ts, cmp_tb, ts, tb) < 0) {
646 ts = cmp_ts;
647 tb = cmp_tb;
648 }
649 }
650
651 if (ts < 0 ||
652 ts > 0 && s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
653 for (unsigned i = 0; i < s->nb_streams; i++) {
654 AVStream *const st2 = s->streams[i];
655 FFStream *const sti2 = ffstream(st2);
656 sti2->mux_ts_offset = av_rescale_q_rnd(-ts, tb,
657 st2->time_base,
658 AV_ROUND_UP);
659 }
660 }
661 si->avoid_negative_ts_status = AVOID_NEGATIVE_TS_KNOWN;
662 }
663
664 offset = sti->mux_ts_offset;
665
666 if (pkt->dts != AV_NOPTS_VALUE)
667 pkt->dts += offset;
668 if (pkt->pts != AV_NOPTS_VALUE)
669 pkt->pts += offset;
670
671 if (si->avoid_negative_ts_use_pts) {
672 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
673 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
674 "pts %s in stream %d.\n"
675 "Try -avoid_negative_ts 1 as a possible workaround.\n",
676 av_ts2str(pkt->pts),
677 pkt->stream_index
678 );
679 }
680 } else {
681 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
682 av_log(s, AV_LOG_WARNING,
683 "Packets poorly interleaved, failed to avoid negative "
684 "timestamp %s in stream %d.\n"
685 "Try -max_interleave_delta 0 as a possible workaround.\n",
686 av_ts2str(pkt->dts),
687 pkt->stream_index
688 );
689 }
690 }
691 }
692
693 /**
694 * Shift timestamps and call muxer; the original pts/dts are not kept.
695 *
696 * FIXME: this function should NEVER get undefined pts/dts beside when the
697 * AVFMT_NOTIMESTAMPS is set.
698 * Those additional safety checks should be dropped once the correct checks
699 * are set in the callers.
700 */
write_packet(AVFormatContext * s,AVPacket * pkt)701 static int write_packet(AVFormatContext *s, AVPacket *pkt)
702 {
703 FFFormatContext *const si = ffformatcontext(s);
704 AVStream *const st = s->streams[pkt->stream_index];
705 FFStream *const sti = ffstream(st);
706 int ret;
707
708 // If the timestamp offsetting below is adjusted, adjust
709 // ff_interleaved_peek similarly.
710 if (s->output_ts_offset) {
711 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
712
713 if (pkt->dts != AV_NOPTS_VALUE)
714 pkt->dts += offset;
715 if (pkt->pts != AV_NOPTS_VALUE)
716 pkt->pts += offset;
717 }
718 handle_avoid_negative_ts(si, sti, pkt);
719
720 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
721 AVFrame **frame = (AVFrame **)pkt->data;
722 av_assert0(pkt->size == sizeof(*frame));
723 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, frame, 0);
724 } else {
725 ret = s->oformat->write_packet(s, pkt);
726 }
727
728 if (s->pb && ret >= 0) {
729 flush_if_needed(s);
730 if (s->pb->error < 0)
731 ret = s->pb->error;
732 }
733
734 if (ret >= 0)
735 st->nb_frames++;
736
737 return ret;
738 }
739
check_packet(AVFormatContext * s,AVPacket * pkt)740 static int check_packet(AVFormatContext *s, AVPacket *pkt)
741 {
742 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
743 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
744 pkt->stream_index);
745 return AVERROR(EINVAL);
746 }
747
748 if (s->streams[pkt->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
749 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
750 return AVERROR(EINVAL);
751 }
752
753 return 0;
754 }
755
prepare_input_packet(AVFormatContext * s,AVStream * st,AVPacket * pkt)756 static int prepare_input_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
757 {
758 FFStream *const sti = ffstream(st);
759 #if !FF_API_COMPUTE_PKT_FIELDS2
760 /* sanitize the timestamps */
761 if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
762
763 /* when there is no reordering (so dts is equal to pts), but
764 * only one of them is set, set the other as well */
765 if (!sti->reorder) {
766 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
767 pkt->pts = pkt->dts;
768 if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
769 pkt->dts = pkt->pts;
770 }
771
772 /* check that the timestamps are set */
773 if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
774 av_log(s, AV_LOG_ERROR,
775 "Timestamps are unset in a packet for stream %d\n", st->index);
776 return AVERROR(EINVAL);
777 }
778
779 /* check that the dts are increasing (or at least non-decreasing,
780 * if the format allows it */
781 if (sti->cur_dts != AV_NOPTS_VALUE &&
782 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && sti->cur_dts >= pkt->dts) ||
783 sti->cur_dts > pkt->dts)) {
784 av_log(s, AV_LOG_ERROR,
785 "Application provided invalid, non monotonically increasing "
786 "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
787 st->index, sti->cur_dts, pkt->dts);
788 return AVERROR(EINVAL);
789 }
790
791 if (pkt->pts < pkt->dts) {
792 av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
793 pkt->pts, pkt->dts, st->index);
794 return AVERROR(EINVAL);
795 }
796 }
797 #endif
798 /* update flags */
799 if (sti->is_intra_only)
800 pkt->flags |= AV_PKT_FLAG_KEY;
801
802 if (!pkt->data && !pkt->side_data_elems) {
803 /* Such empty packets signal EOS for the BSF API; so sanitize
804 * the packet by allocating data of size 0 (+ padding). */
805 av_buffer_unref(&pkt->buf);
806 return av_packet_make_refcounted(pkt);
807 }
808
809 return 0;
810 }
811
812 #define CHUNK_START 0x1000
813
ff_interleave_add_packet(AVFormatContext * s,AVPacket * pkt,int (* compare)(AVFormatContext *,const AVPacket *,const AVPacket *))814 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
815 int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
816 {
817 int ret;
818 FFFormatContext *const si = ffformatcontext(s);
819 PacketListEntry **next_point, *this_pktl;
820 AVStream *st = s->streams[pkt->stream_index];
821 FFStream *const sti = ffstream(st);
822 int chunked = s->max_chunk_size || s->max_chunk_duration;
823
824 this_pktl = av_malloc(sizeof(*this_pktl));
825 if (!this_pktl) {
826 av_packet_unref(pkt);
827 return AVERROR(ENOMEM);
828 }
829 if ((ret = av_packet_make_refcounted(pkt)) < 0) {
830 av_free(this_pktl);
831 av_packet_unref(pkt);
832 return ret;
833 }
834
835 av_packet_move_ref(&this_pktl->pkt, pkt);
836 pkt = &this_pktl->pkt;
837
838 if (sti->last_in_packet_buffer) {
839 next_point = &(sti->last_in_packet_buffer->next);
840 } else {
841 next_point = &si->packet_buffer.head;
842 }
843
844 if (chunked) {
845 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
846 sti->interleaver_chunk_size += pkt->size;
847 sti->interleaver_chunk_duration += pkt->duration;
848 if ( (s->max_chunk_size && sti->interleaver_chunk_size > s->max_chunk_size)
849 || (max && sti->interleaver_chunk_duration > max)) {
850 sti->interleaver_chunk_size = 0;
851 pkt->flags |= CHUNK_START;
852 if (max && sti->interleaver_chunk_duration > max) {
853 int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
854 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
855
856 sti->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
857 } else
858 sti->interleaver_chunk_duration = 0;
859 }
860 }
861 if (*next_point) {
862 if (chunked && !(pkt->flags & CHUNK_START))
863 goto next_non_null;
864
865 if (compare(s, &si->packet_buffer.tail->pkt, pkt)) {
866 while ( *next_point
867 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
868 || !compare(s, &(*next_point)->pkt, pkt)))
869 next_point = &(*next_point)->next;
870 if (*next_point)
871 goto next_non_null;
872 } else {
873 next_point = &(si->packet_buffer.tail->next);
874 }
875 }
876 av_assert1(!*next_point);
877
878 si->packet_buffer.tail = this_pktl;
879 next_non_null:
880
881 this_pktl->next = *next_point;
882
883 sti->last_in_packet_buffer = *next_point = this_pktl;
884
885 return 0;
886 }
887
interleave_compare_dts(AVFormatContext * s,const AVPacket * next,const AVPacket * pkt)888 static int interleave_compare_dts(AVFormatContext *s, const AVPacket *next,
889 const AVPacket *pkt)
890 {
891 AVStream *st = s->streams[pkt->stream_index];
892 AVStream *st2 = s->streams[next->stream_index];
893 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
894 st->time_base);
895 if (s->audio_preload) {
896 int preload = st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
897 int preload2 = st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
898 if (preload != preload2) {
899 int64_t ts, ts2;
900 preload *= s->audio_preload;
901 preload2 *= s->audio_preload;
902 ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - preload;
903 ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - preload2;
904 if (ts == ts2) {
905 ts = ((uint64_t)pkt ->dts*st ->time_base.num*AV_TIME_BASE - (uint64_t)preload *st ->time_base.den)*st2->time_base.den
906 - ((uint64_t)next->dts*st2->time_base.num*AV_TIME_BASE - (uint64_t)preload2*st2->time_base.den)*st ->time_base.den;
907 ts2 = 0;
908 }
909 comp = (ts2 > ts) - (ts2 < ts);
910 }
911 }
912
913 if (comp == 0)
914 return pkt->stream_index < next->stream_index;
915 return comp > 0;
916 }
917
ff_interleave_packet_per_dts(AVFormatContext * s,AVPacket * pkt,int flush,int has_packet)918 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *pkt,
919 int flush, int has_packet)
920 {
921 FFFormatContext *const si = ffformatcontext(s);
922 int stream_count = 0;
923 int noninterleaved_count = 0;
924 int ret;
925 int eof = flush;
926
927 if (has_packet) {
928 if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
929 return ret;
930 }
931
932 for (unsigned i = 0; i < s->nb_streams; i++) {
933 const AVStream *const st = s->streams[i];
934 const FFStream *const sti = cffstream(st);
935 const AVCodecParameters *const par = st->codecpar;
936 if (sti->last_in_packet_buffer) {
937 ++stream_count;
938 } else if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
939 par->codec_id != AV_CODEC_ID_VP8 &&
940 par->codec_id != AV_CODEC_ID_VP9) {
941 ++noninterleaved_count;
942 }
943 }
944
945 if (si->nb_interleaved_streams == stream_count)
946 flush = 1;
947
948 if (s->max_interleave_delta > 0 &&
949 si->packet_buffer.head &&
950 !flush &&
951 si->nb_interleaved_streams == stream_count+noninterleaved_count
952 ) {
953 AVPacket *const top_pkt = &si->packet_buffer.head->pkt;
954 int64_t delta_dts = INT64_MIN;
955 int64_t top_dts = av_rescale_q(top_pkt->dts,
956 s->streams[top_pkt->stream_index]->time_base,
957 AV_TIME_BASE_Q);
958
959 for (unsigned i = 0; i < s->nb_streams; i++) {
960 const AVStream *const st = s->streams[i];
961 const FFStream *const sti = cffstream(st);
962 const PacketListEntry *const last = sti->last_in_packet_buffer;
963 int64_t last_dts;
964
965 if (!last)
966 continue;
967
968 last_dts = av_rescale_q(last->pkt.dts,
969 st->time_base,
970 AV_TIME_BASE_Q);
971 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
972 }
973
974 if (delta_dts > s->max_interleave_delta) {
975 av_log(s, AV_LOG_DEBUG,
976 "Delay between the first packet and last packet in the "
977 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
978 delta_dts, s->max_interleave_delta);
979 flush = 1;
980 }
981 }
982
983 if (si->packet_buffer.head &&
984 eof &&
985 (s->flags & AVFMT_FLAG_SHORTEST) &&
986 si->shortest_end == AV_NOPTS_VALUE) {
987 AVPacket *const top_pkt = &si->packet_buffer.head->pkt;
988
989 si->shortest_end = av_rescale_q(top_pkt->dts,
990 s->streams[top_pkt->stream_index]->time_base,
991 AV_TIME_BASE_Q);
992 }
993
994 if (si->shortest_end != AV_NOPTS_VALUE) {
995 while (si->packet_buffer.head) {
996 PacketListEntry *pktl = si->packet_buffer.head;
997 AVPacket *const top_pkt = &pktl->pkt;
998 AVStream *const st = s->streams[top_pkt->stream_index];
999 FFStream *const sti = ffstream(st);
1000 int64_t top_dts = av_rescale_q(top_pkt->dts, st->time_base,
1001 AV_TIME_BASE_Q);
1002
1003 if (si->shortest_end + 1 >= top_dts)
1004 break;
1005
1006 si->packet_buffer.head = pktl->next;
1007 if (!si->packet_buffer.head)
1008 si->packet_buffer.tail = NULL;
1009
1010 if (sti->last_in_packet_buffer == pktl)
1011 sti->last_in_packet_buffer = NULL;
1012
1013 av_packet_unref(&pktl->pkt);
1014 av_freep(&pktl);
1015 flush = 0;
1016 }
1017 }
1018
1019 if (stream_count && flush) {
1020 PacketListEntry *pktl = si->packet_buffer.head;
1021 AVStream *const st = s->streams[pktl->pkt.stream_index];
1022 FFStream *const sti = ffstream(st);
1023
1024 if (sti->last_in_packet_buffer == pktl)
1025 sti->last_in_packet_buffer = NULL;
1026 avpriv_packet_list_get(&si->packet_buffer, pkt);
1027
1028 return 1;
1029 } else {
1030 return 0;
1031 }
1032 }
1033
ff_interleave_packet_passthrough(AVFormatContext * s,AVPacket * pkt,int flush,int has_packet)1034 int ff_interleave_packet_passthrough(AVFormatContext *s, AVPacket *pkt,
1035 int flush, int has_packet)
1036 {
1037 return has_packet;
1038 }
1039
ff_get_muxer_ts_offset(AVFormatContext * s,int stream_index,int64_t * offset)1040 int ff_get_muxer_ts_offset(AVFormatContext *s, int stream_index, int64_t *offset)
1041 {
1042 AVStream *st;
1043
1044 if (stream_index < 0 || stream_index >= s->nb_streams)
1045 return AVERROR(EINVAL);
1046
1047 st = s->streams[stream_index];
1048 *offset = ffstream(st)->mux_ts_offset;
1049
1050 if (s->output_ts_offset)
1051 *offset += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
1052
1053 return 0;
1054 }
1055
ff_interleaved_peek(AVFormatContext * s,int stream)1056 const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream)
1057 {
1058 FFFormatContext *const si = ffformatcontext(s);
1059 PacketListEntry *pktl = si->packet_buffer.head;
1060 while (pktl) {
1061 if (pktl->pkt.stream_index == stream) {
1062 return &pktl->pkt;
1063 }
1064 pktl = pktl->next;
1065 }
1066 return NULL;
1067 }
1068
check_bitstream(AVFormatContext * s,FFStream * sti,AVPacket * pkt)1069 static int check_bitstream(AVFormatContext *s, FFStream *sti, AVPacket *pkt)
1070 {
1071 int ret;
1072
1073 if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
1074 return 1;
1075
1076 if (s->oformat->check_bitstream) {
1077 if (!sti->bitstream_checked) {
1078 if ((ret = s->oformat->check_bitstream(s, &sti->pub, pkt)) < 0)
1079 return ret;
1080 else if (ret == 1)
1081 sti->bitstream_checked = 1;
1082 }
1083 }
1084
1085 return 1;
1086 }
1087
interleaved_write_packet(AVFormatContext * s,AVPacket * pkt,int flush,int has_packet)1088 static int interleaved_write_packet(AVFormatContext *s, AVPacket *pkt,
1089 int flush, int has_packet)
1090 {
1091 FFFormatContext *const si = ffformatcontext(s);
1092 for (;; ) {
1093 int ret = si->interleave_packet(s, pkt, flush, has_packet);
1094 if (ret <= 0)
1095 return ret;
1096
1097 has_packet = 0;
1098
1099 ret = write_packet(s, pkt);
1100 av_packet_unref(pkt);
1101 if (ret < 0)
1102 return ret;
1103 }
1104 }
1105
write_packet_common(AVFormatContext * s,AVStream * st,AVPacket * pkt,int interleaved)1106 static int write_packet_common(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)
1107 {
1108 int ret;
1109
1110 if (s->debug & FF_FDEBUG_TS)
1111 av_log(s, AV_LOG_DEBUG, "%s size:%d dts:%s pts:%s\n", __FUNCTION__,
1112 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1113
1114 guess_pkt_duration(s, st, pkt);
1115
1116 #if FF_API_COMPUTE_PKT_FIELDS2
1117 if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1118 return ret;
1119 #endif
1120
1121 if (interleaved) {
1122 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1123 return AVERROR(EINVAL);
1124 return interleaved_write_packet(s, pkt, 0, 1);
1125 } else {
1126 return write_packet(s, pkt);
1127 }
1128 }
1129
write_packets_from_bsfs(AVFormatContext * s,AVStream * st,AVPacket * pkt,int interleaved)1130 static int write_packets_from_bsfs(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)
1131 {
1132 FFStream *const sti = ffstream(st);
1133 AVBSFContext *const bsfc = sti->bsfc;
1134 int ret;
1135
1136 if ((ret = av_bsf_send_packet(bsfc, pkt)) < 0) {
1137 av_log(s, AV_LOG_ERROR,
1138 "Failed to send packet to filter %s for stream %d\n",
1139 bsfc->filter->name, st->index);
1140 return ret;
1141 }
1142
1143 do {
1144 ret = av_bsf_receive_packet(bsfc, pkt);
1145 if (ret < 0) {
1146 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
1147 return 0;
1148 av_log(s, AV_LOG_ERROR, "Error applying bitstream filters to an output "
1149 "packet for stream #%d: %s\n", st->index, av_err2str(ret));
1150 if (!(s->error_recognition & AV_EF_EXPLODE) && ret != AVERROR(ENOMEM))
1151 continue;
1152 return ret;
1153 }
1154 av_packet_rescale_ts(pkt, bsfc->time_base_out, st->time_base);
1155 ret = write_packet_common(s, st, pkt, interleaved);
1156 if (ret >= 0 && !interleaved) // a successful write_packet_common already unrefed pkt for interleaved
1157 av_packet_unref(pkt);
1158 } while (ret >= 0);
1159
1160 return ret;
1161 }
1162
write_packets_common(AVFormatContext * s,AVPacket * pkt,int interleaved)1163 static int write_packets_common(AVFormatContext *s, AVPacket *pkt, int interleaved)
1164 {
1165 AVStream *st;
1166 FFStream *sti;
1167 int ret = check_packet(s, pkt);
1168 if (ret < 0)
1169 return ret;
1170 st = s->streams[pkt->stream_index];
1171 sti = ffstream(st);
1172
1173 ret = prepare_input_packet(s, st, pkt);
1174 if (ret < 0)
1175 return ret;
1176
1177 ret = check_bitstream(s, sti, pkt);
1178 if (ret < 0)
1179 return ret;
1180
1181 if (sti->bsfc) {
1182 return write_packets_from_bsfs(s, st, pkt, interleaved);
1183 } else {
1184 return write_packet_common(s, st, pkt, interleaved);
1185 }
1186 }
1187
av_write_frame(AVFormatContext * s,AVPacket * in)1188 int av_write_frame(AVFormatContext *s, AVPacket *in)
1189 {
1190 FFFormatContext *const si = ffformatcontext(s);
1191 AVPacket *pkt = si->parse_pkt;
1192 int ret;
1193
1194 if (!in) {
1195 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
1196 ret = s->oformat->write_packet(s, NULL);
1197 flush_if_needed(s);
1198 if (ret >= 0 && s->pb && s->pb->error < 0)
1199 ret = s->pb->error;
1200 return ret;
1201 }
1202 return 1;
1203 }
1204
1205 if (in->flags & AV_PKT_FLAG_UNCODED_FRAME) {
1206 pkt = in;
1207 } else {
1208 /* We don't own in, so we have to make sure not to modify it.
1209 * (ff_write_chained() relies on this fact.)
1210 * The following avoids copying in's data unnecessarily.
1211 * Copying side data is unavoidable as a bitstream filter
1212 * may change it, e.g. free it on errors. */
1213 pkt->data = in->data;
1214 pkt->size = in->size;
1215 ret = av_packet_copy_props(pkt, in);
1216 if (ret < 0)
1217 return ret;
1218 if (in->buf) {
1219 pkt->buf = av_buffer_ref(in->buf);
1220 if (!pkt->buf) {
1221 ret = AVERROR(ENOMEM);
1222 goto fail;
1223 }
1224 }
1225 }
1226
1227 ret = write_packets_common(s, pkt, 0/*non-interleaved*/);
1228
1229 fail:
1230 // Uncoded frames using the noninterleaved codepath are also freed here
1231 av_packet_unref(pkt);
1232 return ret;
1233 }
1234
av_interleaved_write_frame(AVFormatContext * s,AVPacket * pkt)1235 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
1236 {
1237 int ret;
1238
1239 if (pkt) {
1240 ret = write_packets_common(s, pkt, 1/*interleaved*/);
1241 if (ret < 0)
1242 av_packet_unref(pkt);
1243 return ret;
1244 } else {
1245 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1246 return interleaved_write_packet(s, ffformatcontext(s)->parse_pkt, 1/*flush*/, 0);
1247 }
1248 }
1249
av_write_trailer(AVFormatContext * s)1250 int av_write_trailer(AVFormatContext *s)
1251 {
1252 FFFormatContext *const si = ffformatcontext(s);
1253 AVPacket *const pkt = si->parse_pkt;
1254 int ret1, ret = 0;
1255
1256 for (unsigned i = 0; i < s->nb_streams; i++) {
1257 AVStream *const st = s->streams[i];
1258 FFStream *const sti = ffstream(st);
1259 if (sti->bsfc) {
1260 ret1 = write_packets_from_bsfs(s, st, pkt, 1/*interleaved*/);
1261 if (ret1 < 0)
1262 av_packet_unref(pkt);
1263 if (ret >= 0)
1264 ret = ret1;
1265 }
1266 }
1267 ret1 = interleaved_write_packet(s, pkt, 1, 0);
1268 if (ret >= 0)
1269 ret = ret1;
1270
1271 if (s->oformat->write_trailer) {
1272 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1273 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_TRAILER);
1274 if (ret >= 0) {
1275 ret = s->oformat->write_trailer(s);
1276 } else {
1277 s->oformat->write_trailer(s);
1278 }
1279 }
1280
1281 deinit_muxer(s);
1282
1283 if (s->pb)
1284 avio_flush(s->pb);
1285 if (ret == 0)
1286 ret = s->pb ? s->pb->error : 0;
1287 for (unsigned i = 0; i < s->nb_streams; i++) {
1288 av_freep(&s->streams[i]->priv_data);
1289 av_freep(&ffstream(s->streams[i])->index_entries);
1290 }
1291 if (s->oformat->priv_class)
1292 av_opt_free(s->priv_data);
1293 av_freep(&s->priv_data);
1294 av_packet_unref(si->pkt);
1295 return ret;
1296 }
1297
av_get_output_timestamp(struct AVFormatContext * s,int stream,int64_t * dts,int64_t * wall)1298 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1299 int64_t *dts, int64_t *wall)
1300 {
1301 if (!s->oformat || !s->oformat->get_output_timestamp)
1302 return AVERROR(ENOSYS);
1303 s->oformat->get_output_timestamp(s, stream, dts, wall);
1304 return 0;
1305 }
1306
ff_stream_add_bitstream_filter(AVStream * st,const char * name,const char * args)1307 int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args)
1308 {
1309 int ret;
1310 const AVBitStreamFilter *bsf;
1311 FFStream *const sti = ffstream(st);
1312 AVBSFContext *bsfc;
1313
1314 av_assert0(!sti->bsfc);
1315
1316 if (!(bsf = av_bsf_get_by_name(name))) {
1317 av_log(NULL, AV_LOG_ERROR, "Unknown bitstream filter '%s'\n", name);
1318 return AVERROR_BSF_NOT_FOUND;
1319 }
1320
1321 if ((ret = av_bsf_alloc(bsf, &bsfc)) < 0)
1322 return ret;
1323
1324 bsfc->time_base_in = st->time_base;
1325 if ((ret = avcodec_parameters_copy(bsfc->par_in, st->codecpar)) < 0) {
1326 av_bsf_free(&bsfc);
1327 return ret;
1328 }
1329
1330 if (args && bsfc->filter->priv_class) {
1331 if ((ret = av_set_options_string(bsfc->priv_data, args, "=", ":")) < 0) {
1332 av_bsf_free(&bsfc);
1333 return ret;
1334 }
1335 }
1336
1337 if ((ret = av_bsf_init(bsfc)) < 0) {
1338 av_bsf_free(&bsfc);
1339 return ret;
1340 }
1341
1342 sti->bsfc = bsfc;
1343
1344 av_log(NULL, AV_LOG_VERBOSE,
1345 "Automatically inserted bitstream filter '%s'; args='%s'\n",
1346 name, args ? args : "");
1347 return 1;
1348 }
1349
ff_write_chained(AVFormatContext * dst,int dst_stream,AVPacket * pkt,AVFormatContext * src,int interleave)1350 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1351 AVFormatContext *src, int interleave)
1352 {
1353 int64_t pts = pkt->pts, dts = pkt->dts, duration = pkt->duration;
1354 int stream_index = pkt->stream_index;
1355 AVRational time_base = pkt->time_base;
1356 int ret;
1357
1358 pkt->stream_index = dst_stream;
1359
1360 av_packet_rescale_ts(pkt,
1361 src->streams[stream_index]->time_base,
1362 dst->streams[dst_stream]->time_base);
1363
1364 if (!interleave) {
1365 ret = av_write_frame(dst, pkt);
1366 /* We only have to backup and restore the fields that
1367 * we changed ourselves, because av_write_frame() does not
1368 * modify the packet given to it. */
1369 pkt->pts = pts;
1370 pkt->dts = dts;
1371 pkt->duration = duration;
1372 pkt->stream_index = stream_index;
1373 pkt->time_base = time_base;
1374 } else
1375 ret = av_interleaved_write_frame(dst, pkt);
1376
1377 return ret;
1378 }
1379
uncoded_frame_free(void * unused,uint8_t * data)1380 static void uncoded_frame_free(void *unused, uint8_t *data)
1381 {
1382 av_frame_free((AVFrame **)data);
1383 av_free(data);
1384 }
1385
write_uncoded_frame_internal(AVFormatContext * s,int stream_index,AVFrame * frame,int interleaved)1386 static int write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1387 AVFrame *frame, int interleaved)
1388 {
1389 FFFormatContext *const si = ffformatcontext(s);
1390 AVPacket *pkt = si->parse_pkt;
1391
1392 av_assert0(s->oformat);
1393 if (!s->oformat->write_uncoded_frame) {
1394 av_frame_free(&frame);
1395 return AVERROR(ENOSYS);
1396 }
1397
1398 if (!frame) {
1399 pkt = NULL;
1400 } else {
1401 size_t bufsize = sizeof(frame) + AV_INPUT_BUFFER_PADDING_SIZE;
1402 AVFrame **framep = av_mallocz(bufsize);
1403
1404 if (!framep)
1405 goto fail;
1406 pkt->buf = av_buffer_create((void *)framep, bufsize,
1407 uncoded_frame_free, NULL, 0);
1408 if (!pkt->buf) {
1409 av_free(framep);
1410 fail:
1411 av_frame_free(&frame);
1412 return AVERROR(ENOMEM);
1413 }
1414 *framep = frame;
1415
1416 pkt->data = (void *)framep;
1417 pkt->size = sizeof(frame);
1418 pkt->pts =
1419 pkt->dts = frame->pts;
1420 pkt->duration = frame->pkt_duration;
1421 pkt->stream_index = stream_index;
1422 pkt->flags |= AV_PKT_FLAG_UNCODED_FRAME;
1423 }
1424
1425 return interleaved ? av_interleaved_write_frame(s, pkt) :
1426 av_write_frame(s, pkt);
1427 }
1428
av_write_uncoded_frame(AVFormatContext * s,int stream_index,AVFrame * frame)1429 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1430 AVFrame *frame)
1431 {
1432 return write_uncoded_frame_internal(s, stream_index, frame, 0);
1433 }
1434
av_interleaved_write_uncoded_frame(AVFormatContext * s,int stream_index,AVFrame * frame)1435 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1436 AVFrame *frame)
1437 {
1438 return write_uncoded_frame_internal(s, stream_index, frame, 1);
1439 }
1440
av_write_uncoded_frame_query(AVFormatContext * s,int stream_index)1441 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1442 {
1443 av_assert0(s->oformat);
1444 if (!s->oformat->write_uncoded_frame)
1445 return AVERROR(ENOSYS);
1446 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1447 AV_WRITE_UNCODED_FRAME_QUERY);
1448 }
1449