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 #ifdef OHOS_TIMED_META_TRACK
379 case AVMEDIA_TYPE_TIMEDMETA:
380 den = (int64_t)st->time_base.num * st->time_base.den;
381 break;
382 #endif
383 default:
384 break;
385 }
386
387 if (!sti->priv_pts)
388 sti->priv_pts = av_mallocz(sizeof(*sti->priv_pts));
389 if (!sti->priv_pts)
390 return AVERROR(ENOMEM);
391
392 if (den != AV_NOPTS_VALUE) {
393 if (den <= 0)
394 return AVERROR_INVALIDDATA;
395
396 frac_init(sti->priv_pts, 0, 0, den);
397 }
398 }
399
400 si->avoid_negative_ts_status = AVOID_NEGATIVE_TS_UNKNOWN;
401 if (s->avoid_negative_ts < 0) {
402 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
403 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
404 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_DISABLED;
405 si->avoid_negative_ts_status = AVOID_NEGATIVE_TS_DISABLED;
406 } else
407 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
408 } else if (s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_DISABLED)
409 si->avoid_negative_ts_status = AVOID_NEGATIVE_TS_DISABLED;
410
411 return 0;
412 }
413
flush_if_needed(AVFormatContext *s)414 static void flush_if_needed(AVFormatContext *s)
415 {
416 if (s->pb && s->pb->error >= 0) {
417 if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
418 avio_flush(s->pb);
419 else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
420 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
421 }
422 }
423
deinit_muxer(AVFormatContext *s)424 static void deinit_muxer(AVFormatContext *s)
425 {
426 FFFormatContext *const si = ffformatcontext(s);
427 if (s->oformat && s->oformat->deinit && si->initialized)
428 s->oformat->deinit(s);
429 si->initialized =
430 si->streams_initialized = 0;
431 }
432
avformat_init_output(AVFormatContext *s, AVDictionary **options)433 int avformat_init_output(AVFormatContext *s, AVDictionary **options)
434 {
435 FFFormatContext *const si = ffformatcontext(s);
436 int ret = 0;
437
438 if ((ret = init_muxer(s, options)) < 0)
439 return ret;
440
441 si->initialized = 1;
442 si->streams_initialized = ret;
443
444 if (s->oformat->init && ret) {
445 if ((ret = init_pts(s)) < 0)
446 return ret;
447
448 return AVSTREAM_INIT_IN_INIT_OUTPUT;
449 }
450
451 return AVSTREAM_INIT_IN_WRITE_HEADER;
452 }
453
avformat_write_header(AVFormatContext *s, AVDictionary **options)454 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
455 {
456 FFFormatContext *const si = ffformatcontext(s);
457 int already_initialized = si->initialized;
458 int streams_already_initialized = si->streams_initialized;
459 int ret = 0;
460
461 if (!already_initialized)
462 if ((ret = avformat_init_output(s, options)) < 0)
463 return ret;
464
465 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
466 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_HEADER);
467 if (s->oformat->write_header) {
468 ret = s->oformat->write_header(s);
469 if (ret >= 0 && s->pb && s->pb->error < 0)
470 ret = s->pb->error;
471 if (ret < 0)
472 goto fail;
473 flush_if_needed(s);
474 }
475 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
476 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_UNKNOWN);
477
478 if (!si->streams_initialized) {
479 if ((ret = init_pts(s)) < 0)
480 goto fail;
481 }
482
483 return streams_already_initialized;
484
485 fail:
486 deinit_muxer(s);
487 return ret;
488 }
489
490 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
491
492
493 #if FF_API_COMPUTE_PKT_FIELDS2
494 FF_DISABLE_DEPRECATION_WARNINGS
495 //FIXME merge with compute_pkt_fields
compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)496 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
497 {
498 FFFormatContext *const si = ffformatcontext(s);
499 FFStream *const sti = ffstream(st);
500 int delay = st->codecpar->video_delay;
501 int frame_size;
502
503 if (!si->missing_ts_warning &&
504 !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
505 (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC) || (st->disposition & AV_DISPOSITION_TIMED_THUMBNAILS)) &&
506 (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
507 av_log(s, AV_LOG_WARNING,
508 "Timestamps are unset in a packet for stream %d. "
509 "This is deprecated and will stop working in the future. "
510 "Fix your code to set the timestamps properly\n", st->index);
511 si->missing_ts_warning = 1;
512 }
513
514 if (s->debug & FF_FDEBUG_TS)
515 av_log(s, AV_LOG_DEBUG, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
516 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(sti->cur_dts), delay, pkt->size, pkt->stream_index);
517
518 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
519 pkt->pts = pkt->dts;
520
521 //XXX/FIXME this is a temporary hack until all encoders output pts
522 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
523 static int warned;
524 if (!warned) {
525 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
526 warned = 1;
527 }
528 pkt->dts =
529 // pkt->pts= st->cur_dts;
530 pkt->pts = sti->priv_pts->val;
531 }
532
533 //calculate dts from pts
534 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
535 sti->pts_buffer[0] = pkt->pts;
536 for (int i = 1; i < delay + 1 && sti->pts_buffer[i] == AV_NOPTS_VALUE; i++)
537 sti->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
538 for (int i = 0; i<delay && sti->pts_buffer[i] > sti->pts_buffer[i + 1]; i++)
539 FFSWAP(int64_t, sti->pts_buffer[i], sti->pts_buffer[i + 1]);
540
541 pkt->dts = sti->pts_buffer[0];
542 }
543
544 if (sti->cur_dts && sti->cur_dts != AV_NOPTS_VALUE &&
545 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
546 st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE &&
547 st->codecpar->codec_type != AVMEDIA_TYPE_DATA &&
548 sti->cur_dts >= pkt->dts) || sti->cur_dts > pkt->dts)) {
549 av_log(s, AV_LOG_ERROR,
550 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
551 st->index, av_ts2str(sti->cur_dts), av_ts2str(pkt->dts));
552 return AVERROR(EINVAL);
553 }
554 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
555 av_log(s, AV_LOG_ERROR,
556 "pts (%s) < dts (%s) in stream %d\n",
557 av_ts2str(pkt->pts), av_ts2str(pkt->dts),
558 st->index);
559 return AVERROR(EINVAL);
560 }
561
562 if (s->debug & FF_FDEBUG_TS)
563 av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%s dts2:%s\n",
564 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
565
566 sti->cur_dts = pkt->dts;
567 sti->priv_pts->val = pkt->dts;
568
569 /* update pts */
570 switch (st->codecpar->codec_type) {
571 case AVMEDIA_TYPE_AUDIO:
572 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
573 (*(AVFrame **)pkt->data)->nb_samples :
574 av_get_audio_frame_duration2(st->codecpar, pkt->size);
575
576 /* HACK/FIXME, we skip the initial 0 size packets as they are most
577 * likely equal to the encoder delay, but it would be better if we
578 * had the real timestamps from the encoder */
579 if (frame_size >= 0 && (pkt->size || sti->priv_pts->num != sti->priv_pts->den >> 1 || sti->priv_pts->val)) {
580 frac_add(sti->priv_pts, (int64_t)st->time_base.den * frame_size);
581 }
582 break;
583 case AVMEDIA_TYPE_VIDEO:
584 frac_add(sti->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
585 break;
586 }
587 return 0;
588 }
589 FF_ENABLE_DEPRECATION_WARNINGS
590 #endif
591
guess_pkt_duration(AVFormatContext *s, AVStream *st, AVPacket *pkt)592 static void guess_pkt_duration(AVFormatContext *s, AVStream *st, AVPacket *pkt)
593 {
594 if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
595 av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
596 pkt->duration, pkt->stream_index);
597 pkt->duration = 0;
598 }
599
600 if (pkt->duration)
601 return;
602
603 switch (st->codecpar->codec_type) {
604 case AVMEDIA_TYPE_VIDEO:
605 if (st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0) {
606 pkt->duration = av_rescale_q(1, av_inv_q(st->avg_frame_rate),
607 st->time_base);
608 } else if (st->time_base.num * 1000LL > st->time_base.den)
609 pkt->duration = 1;
610 break;
611 case AVMEDIA_TYPE_AUDIO: {
612 int frame_size = av_get_audio_frame_duration2(st->codecpar, pkt->size);
613 if (frame_size && st->codecpar->sample_rate) {
614 pkt->duration = av_rescale_q(frame_size,
615 (AVRational){1, st->codecpar->sample_rate},
616 st->time_base);
617 }
618 break;
619 }
620 }
621 }
622
handle_avoid_negative_ts(FFFormatContext *si, FFStream *sti, AVPacket *pkt)623 static void handle_avoid_negative_ts(FFFormatContext *si, FFStream *sti,
624 AVPacket *pkt)
625 {
626 AVFormatContext *const s = &si->pub;
627 int64_t offset;
628
629 if (!AVOID_NEGATIVE_TS_ENABLED(si->avoid_negative_ts_status))
630 return;
631
632 if (si->avoid_negative_ts_status == AVOID_NEGATIVE_TS_UNKNOWN) {
633 int use_pts = si->avoid_negative_ts_use_pts;
634 int64_t ts = use_pts ? pkt->pts : pkt->dts;
635 AVRational tb = sti->pub.time_base;
636
637 if (ts == AV_NOPTS_VALUE)
638 return;
639
640 /* Peek into the muxing queue to improve our estimate
641 * of the lowest timestamp if av_interleaved_write_frame() is used. */
642 for (const PacketListEntry *pktl = si->packet_buffer.head;
643 pktl; pktl = pktl->next) {
644 AVRational cmp_tb = s->streams[pktl->pkt.stream_index]->time_base;
645 int64_t cmp_ts = use_pts ? pktl->pkt.pts : pktl->pkt.dts;
646 if (cmp_ts == AV_NOPTS_VALUE)
647 continue;
648 if (s->output_ts_offset)
649 cmp_ts += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, cmp_tb);
650 if (av_compare_ts(cmp_ts, cmp_tb, ts, tb) < 0) {
651 ts = cmp_ts;
652 tb = cmp_tb;
653 }
654 }
655
656 if (ts < 0 ||
657 ts > 0 && s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
658 for (unsigned i = 0; i < s->nb_streams; i++) {
659 AVStream *const st2 = s->streams[i];
660 FFStream *const sti2 = ffstream(st2);
661 sti2->mux_ts_offset = av_rescale_q_rnd(-ts, tb,
662 st2->time_base,
663 AV_ROUND_UP);
664 }
665 }
666 si->avoid_negative_ts_status = AVOID_NEGATIVE_TS_KNOWN;
667 }
668
669 offset = sti->mux_ts_offset;
670
671 if (pkt->dts != AV_NOPTS_VALUE)
672 pkt->dts += offset;
673 if (pkt->pts != AV_NOPTS_VALUE)
674 pkt->pts += offset;
675
676 if (si->avoid_negative_ts_use_pts) {
677 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
678 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
679 "pts %s in stream %d.\n"
680 "Try -avoid_negative_ts 1 as a possible workaround.\n",
681 av_ts2str(pkt->pts),
682 pkt->stream_index
683 );
684 }
685 } else {
686 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
687 av_log(s, AV_LOG_WARNING,
688 "Packets poorly interleaved, failed to avoid negative "
689 "timestamp %s in stream %d.\n"
690 "Try -max_interleave_delta 0 as a possible workaround.\n",
691 av_ts2str(pkt->dts),
692 pkt->stream_index
693 );
694 }
695 }
696 }
697
698 /**
699 * Shift timestamps and call muxer; the original pts/dts are not kept.
700 *
701 * FIXME: this function should NEVER get undefined pts/dts beside when the
702 * AVFMT_NOTIMESTAMPS is set.
703 * Those additional safety checks should be dropped once the correct checks
704 * are set in the callers.
705 */
write_packet(AVFormatContext *s, AVPacket *pkt)706 static int write_packet(AVFormatContext *s, AVPacket *pkt)
707 {
708 FFFormatContext *const si = ffformatcontext(s);
709 AVStream *const st = s->streams[pkt->stream_index];
710 FFStream *const sti = ffstream(st);
711 int ret;
712
713 // If the timestamp offsetting below is adjusted, adjust
714 // ff_interleaved_peek similarly.
715 if (s->output_ts_offset) {
716 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
717
718 if (pkt->dts != AV_NOPTS_VALUE)
719 pkt->dts += offset;
720 if (pkt->pts != AV_NOPTS_VALUE)
721 pkt->pts += offset;
722 }
723 handle_avoid_negative_ts(si, sti, pkt);
724
725 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
726 AVFrame **frame = (AVFrame **)pkt->data;
727 av_assert0(pkt->size == sizeof(*frame));
728 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, frame, 0);
729 } else {
730 ret = s->oformat->write_packet(s, pkt);
731 }
732
733 if (s->pb && ret >= 0) {
734 flush_if_needed(s);
735 if (s->pb->error < 0)
736 ret = s->pb->error;
737 }
738
739 if (ret >= 0)
740 st->nb_frames++;
741
742 return ret;
743 }
744
check_packet(AVFormatContext *s, AVPacket *pkt)745 static int check_packet(AVFormatContext *s, AVPacket *pkt)
746 {
747 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
748 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
749 pkt->stream_index);
750 return AVERROR(EINVAL);
751 }
752
753 if (s->streams[pkt->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
754 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
755 return AVERROR(EINVAL);
756 }
757
758 return 0;
759 }
760
prepare_input_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)761 static int prepare_input_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
762 {
763 FFStream *const sti = ffstream(st);
764 #if !FF_API_COMPUTE_PKT_FIELDS2
765 /* sanitize the timestamps */
766 if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
767
768 /* when there is no reordering (so dts is equal to pts), but
769 * only one of them is set, set the other as well */
770 if (!sti->reorder) {
771 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
772 pkt->pts = pkt->dts;
773 if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
774 pkt->dts = pkt->pts;
775 }
776
777 /* check that the timestamps are set */
778 if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
779 av_log(s, AV_LOG_ERROR,
780 "Timestamps are unset in a packet for stream %d\n", st->index);
781 return AVERROR(EINVAL);
782 }
783
784 /* check that the dts are increasing (or at least non-decreasing,
785 * if the format allows it */
786 if (sti->cur_dts != AV_NOPTS_VALUE &&
787 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && sti->cur_dts >= pkt->dts) ||
788 sti->cur_dts > pkt->dts)) {
789 av_log(s, AV_LOG_ERROR,
790 "Application provided invalid, non monotonically increasing "
791 "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
792 st->index, sti->cur_dts, pkt->dts);
793 return AVERROR(EINVAL);
794 }
795
796 if (pkt->pts < pkt->dts) {
797 av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
798 pkt->pts, pkt->dts, st->index);
799 return AVERROR(EINVAL);
800 }
801 }
802 #endif
803 /* update flags */
804 if (sti->is_intra_only)
805 pkt->flags |= AV_PKT_FLAG_KEY;
806
807 if (!pkt->data && !pkt->side_data_elems) {
808 /* Such empty packets signal EOS for the BSF API; so sanitize
809 * the packet by allocating data of size 0 (+ padding). */
810 av_buffer_unref(&pkt->buf);
811 return av_packet_make_refcounted(pkt);
812 }
813
814 return 0;
815 }
816
817 #define CHUNK_START 0x1000
818
ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))819 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
820 int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
821 {
822 int ret;
823 FFFormatContext *const si = ffformatcontext(s);
824 PacketListEntry **next_point, *this_pktl;
825 AVStream *st = s->streams[pkt->stream_index];
826 FFStream *const sti = ffstream(st);
827 int chunked = s->max_chunk_size || s->max_chunk_duration;
828
829 this_pktl = av_malloc(sizeof(*this_pktl));
830 if (!this_pktl) {
831 av_packet_unref(pkt);
832 return AVERROR(ENOMEM);
833 }
834 if ((ret = av_packet_make_refcounted(pkt)) < 0) {
835 av_free(this_pktl);
836 av_packet_unref(pkt);
837 return ret;
838 }
839
840 av_packet_move_ref(&this_pktl->pkt, pkt);
841 pkt = &this_pktl->pkt;
842
843 if (sti->last_in_packet_buffer) {
844 next_point = &(sti->last_in_packet_buffer->next);
845 } else {
846 next_point = &si->packet_buffer.head;
847 }
848
849 if (chunked) {
850 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
851 sti->interleaver_chunk_size += pkt->size;
852 sti->interleaver_chunk_duration += pkt->duration;
853 if ( (s->max_chunk_size && sti->interleaver_chunk_size > s->max_chunk_size)
854 || (max && sti->interleaver_chunk_duration > max)) {
855 sti->interleaver_chunk_size = 0;
856 pkt->flags |= CHUNK_START;
857 if (max && sti->interleaver_chunk_duration > max) {
858 int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
859 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
860
861 sti->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
862 } else
863 sti->interleaver_chunk_duration = 0;
864 }
865 }
866 if (*next_point) {
867 if (chunked && !(pkt->flags & CHUNK_START))
868 goto next_non_null;
869
870 if (compare(s, &si->packet_buffer.tail->pkt, pkt)) {
871 while ( *next_point
872 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
873 || !compare(s, &(*next_point)->pkt, pkt)))
874 next_point = &(*next_point)->next;
875 if (*next_point)
876 goto next_non_null;
877 } else {
878 next_point = &(si->packet_buffer.tail->next);
879 }
880 }
881 av_assert1(!*next_point);
882
883 si->packet_buffer.tail = this_pktl;
884 next_non_null:
885
886 this_pktl->next = *next_point;
887
888 sti->last_in_packet_buffer = *next_point = this_pktl;
889
890 return 0;
891 }
892
interleave_compare_dts(AVFormatContext *s, const AVPacket *next, const AVPacket *pkt)893 static int interleave_compare_dts(AVFormatContext *s, const AVPacket *next,
894 const AVPacket *pkt)
895 {
896 AVStream *st = s->streams[pkt->stream_index];
897 AVStream *st2 = s->streams[next->stream_index];
898 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
899 st->time_base);
900 if (s->audio_preload) {
901 int preload = st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
902 int preload2 = st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
903 if (preload != preload2) {
904 int64_t ts, ts2;
905 preload *= s->audio_preload;
906 preload2 *= s->audio_preload;
907 ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - preload;
908 ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - preload2;
909 if (ts == ts2) {
910 ts = ((uint64_t)pkt ->dts*st ->time_base.num*AV_TIME_BASE - (uint64_t)preload *st ->time_base.den)*st2->time_base.den
911 - ((uint64_t)next->dts*st2->time_base.num*AV_TIME_BASE - (uint64_t)preload2*st2->time_base.den)*st ->time_base.den;
912 ts2 = 0;
913 }
914 comp = (ts2 > ts) - (ts2 < ts);
915 }
916 }
917
918 if (comp == 0)
919 return pkt->stream_index < next->stream_index;
920 return comp > 0;
921 }
922
ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *pkt, int flush, int has_packet)923 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *pkt,
924 int flush, int has_packet)
925 {
926 FFFormatContext *const si = ffformatcontext(s);
927 int stream_count = 0;
928 int noninterleaved_count = 0;
929 int ret;
930 int eof = flush;
931
932 if (has_packet) {
933 if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
934 return ret;
935 }
936
937 for (unsigned i = 0; i < s->nb_streams; i++) {
938 const AVStream *const st = s->streams[i];
939 const FFStream *const sti = cffstream(st);
940 const AVCodecParameters *const par = st->codecpar;
941 if (sti->last_in_packet_buffer) {
942 ++stream_count;
943 } else if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
944 par->codec_id != AV_CODEC_ID_VP8 &&
945 par->codec_id != AV_CODEC_ID_VP9) {
946 ++noninterleaved_count;
947 }
948 }
949
950 if (si->nb_interleaved_streams == stream_count)
951 flush = 1;
952
953 if (s->max_interleave_delta > 0 &&
954 si->packet_buffer.head &&
955 !flush &&
956 si->nb_interleaved_streams == stream_count+noninterleaved_count
957 ) {
958 AVPacket *const top_pkt = &si->packet_buffer.head->pkt;
959 int64_t delta_dts = INT64_MIN;
960 int64_t top_dts = av_rescale_q(top_pkt->dts,
961 s->streams[top_pkt->stream_index]->time_base,
962 AV_TIME_BASE_Q);
963
964 for (unsigned i = 0; i < s->nb_streams; i++) {
965 const AVStream *const st = s->streams[i];
966 const FFStream *const sti = cffstream(st);
967 const PacketListEntry *const last = sti->last_in_packet_buffer;
968 int64_t last_dts;
969
970 if (!last)
971 continue;
972
973 last_dts = av_rescale_q(last->pkt.dts,
974 st->time_base,
975 AV_TIME_BASE_Q);
976 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
977 }
978
979 if (delta_dts > s->max_interleave_delta) {
980 av_log(s, AV_LOG_DEBUG,
981 "Delay between the first packet and last packet in the "
982 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
983 delta_dts, s->max_interleave_delta);
984 flush = 1;
985 }
986 }
987
988 if (si->packet_buffer.head &&
989 eof &&
990 (s->flags & AVFMT_FLAG_SHORTEST) &&
991 si->shortest_end == AV_NOPTS_VALUE) {
992 AVPacket *const top_pkt = &si->packet_buffer.head->pkt;
993
994 si->shortest_end = av_rescale_q(top_pkt->dts,
995 s->streams[top_pkt->stream_index]->time_base,
996 AV_TIME_BASE_Q);
997 }
998
999 if (si->shortest_end != AV_NOPTS_VALUE) {
1000 while (si->packet_buffer.head) {
1001 PacketListEntry *pktl = si->packet_buffer.head;
1002 AVPacket *const top_pkt = &pktl->pkt;
1003 AVStream *const st = s->streams[top_pkt->stream_index];
1004 FFStream *const sti = ffstream(st);
1005 int64_t top_dts = av_rescale_q(top_pkt->dts, st->time_base,
1006 AV_TIME_BASE_Q);
1007
1008 if (si->shortest_end + 1 >= top_dts)
1009 break;
1010
1011 si->packet_buffer.head = pktl->next;
1012 if (!si->packet_buffer.head)
1013 si->packet_buffer.tail = NULL;
1014
1015 if (sti->last_in_packet_buffer == pktl)
1016 sti->last_in_packet_buffer = NULL;
1017
1018 av_packet_unref(&pktl->pkt);
1019 av_freep(&pktl);
1020 flush = 0;
1021 }
1022 }
1023
1024 if (stream_count && flush) {
1025 PacketListEntry *pktl = si->packet_buffer.head;
1026 AVStream *const st = s->streams[pktl->pkt.stream_index];
1027 FFStream *const sti = ffstream(st);
1028
1029 if (sti->last_in_packet_buffer == pktl)
1030 sti->last_in_packet_buffer = NULL;
1031 avpriv_packet_list_get(&si->packet_buffer, pkt);
1032
1033 return 1;
1034 } else {
1035 return 0;
1036 }
1037 }
1038
ff_interleave_packet_passthrough(AVFormatContext *s, AVPacket *pkt, int flush, int has_packet)1039 int ff_interleave_packet_passthrough(AVFormatContext *s, AVPacket *pkt,
1040 int flush, int has_packet)
1041 {
1042 return has_packet;
1043 }
1044
ff_get_muxer_ts_offset(AVFormatContext *s, int stream_index, int64_t *offset)1045 int ff_get_muxer_ts_offset(AVFormatContext *s, int stream_index, int64_t *offset)
1046 {
1047 AVStream *st;
1048
1049 if (stream_index < 0 || stream_index >= s->nb_streams)
1050 return AVERROR(EINVAL);
1051
1052 st = s->streams[stream_index];
1053 *offset = ffstream(st)->mux_ts_offset;
1054
1055 if (s->output_ts_offset)
1056 *offset += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
1057
1058 return 0;
1059 }
1060
ff_interleaved_peek(AVFormatContext *s, int stream)1061 const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream)
1062 {
1063 FFFormatContext *const si = ffformatcontext(s);
1064 PacketListEntry *pktl = si->packet_buffer.head;
1065 while (pktl) {
1066 if (pktl->pkt.stream_index == stream) {
1067 return &pktl->pkt;
1068 }
1069 pktl = pktl->next;
1070 }
1071 return NULL;
1072 }
1073
check_bitstream(AVFormatContext *s, FFStream *sti, AVPacket *pkt)1074 static int check_bitstream(AVFormatContext *s, FFStream *sti, AVPacket *pkt)
1075 {
1076 int ret;
1077
1078 if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
1079 return 1;
1080
1081 if (s->oformat->check_bitstream) {
1082 if (!sti->bitstream_checked) {
1083 if ((ret = s->oformat->check_bitstream(s, &sti->pub, pkt)) < 0)
1084 return ret;
1085 else if (ret == 1)
1086 sti->bitstream_checked = 1;
1087 }
1088 }
1089
1090 return 1;
1091 }
1092
interleaved_write_packet(AVFormatContext *s, AVPacket *pkt, int flush, int has_packet)1093 static int interleaved_write_packet(AVFormatContext *s, AVPacket *pkt,
1094 int flush, int has_packet)
1095 {
1096 FFFormatContext *const si = ffformatcontext(s);
1097 for (;; ) {
1098 int ret = si->interleave_packet(s, pkt, flush, has_packet);
1099 if (ret <= 0)
1100 return ret;
1101
1102 has_packet = 0;
1103
1104 ret = write_packet(s, pkt);
1105 av_packet_unref(pkt);
1106 if (ret < 0)
1107 return ret;
1108 }
1109 }
1110
write_packet_common(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)1111 static int write_packet_common(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)
1112 {
1113 int ret;
1114
1115 if (s->debug & FF_FDEBUG_TS)
1116 av_log(s, AV_LOG_DEBUG, "%s size:%d dts:%s pts:%s\n", __FUNCTION__,
1117 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1118
1119 guess_pkt_duration(s, st, pkt);
1120
1121 #if FF_API_COMPUTE_PKT_FIELDS2
1122 if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1123 return ret;
1124 #endif
1125
1126 if (interleaved) {
1127 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1128 return AVERROR(EINVAL);
1129 return interleaved_write_packet(s, pkt, 0, 1);
1130 } else {
1131 return write_packet(s, pkt);
1132 }
1133 }
1134
write_packets_from_bsfs(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)1135 static int write_packets_from_bsfs(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)
1136 {
1137 FFStream *const sti = ffstream(st);
1138 AVBSFContext *const bsfc = sti->bsfc;
1139 int ret;
1140
1141 if ((ret = av_bsf_send_packet(bsfc, pkt)) < 0) {
1142 av_log(s, AV_LOG_ERROR,
1143 "Failed to send packet to filter %s for stream %d\n",
1144 bsfc->filter->name, st->index);
1145 return ret;
1146 }
1147
1148 do {
1149 ret = av_bsf_receive_packet(bsfc, pkt);
1150 if (ret < 0) {
1151 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
1152 return 0;
1153 av_log(s, AV_LOG_ERROR, "Error applying bitstream filters to an output "
1154 "packet for stream #%d: %s\n", st->index, av_err2str(ret));
1155 if (!(s->error_recognition & AV_EF_EXPLODE) && ret != AVERROR(ENOMEM))
1156 continue;
1157 return ret;
1158 }
1159 av_packet_rescale_ts(pkt, bsfc->time_base_out, st->time_base);
1160 ret = write_packet_common(s, st, pkt, interleaved);
1161 if (ret >= 0 && !interleaved) // a successful write_packet_common already unrefed pkt for interleaved
1162 av_packet_unref(pkt);
1163 } while (ret >= 0);
1164
1165 return ret;
1166 }
1167
write_packets_common(AVFormatContext *s, AVPacket *pkt, int interleaved)1168 static int write_packets_common(AVFormatContext *s, AVPacket *pkt, int interleaved)
1169 {
1170 AVStream *st;
1171 FFStream *sti;
1172 int ret = check_packet(s, pkt);
1173 if (ret < 0)
1174 return ret;
1175 st = s->streams[pkt->stream_index];
1176 sti = ffstream(st);
1177
1178 ret = prepare_input_packet(s, st, pkt);
1179 if (ret < 0)
1180 return ret;
1181
1182 ret = check_bitstream(s, sti, pkt);
1183 if (ret < 0)
1184 return ret;
1185
1186 if (sti->bsfc) {
1187 return write_packets_from_bsfs(s, st, pkt, interleaved);
1188 } else {
1189 return write_packet_common(s, st, pkt, interleaved);
1190 }
1191 }
1192
av_write_frame(AVFormatContext *s, AVPacket *in)1193 int av_write_frame(AVFormatContext *s, AVPacket *in)
1194 {
1195 FFFormatContext *const si = ffformatcontext(s);
1196 AVPacket *pkt = si->parse_pkt;
1197 int ret;
1198
1199 if (!in) {
1200 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
1201 ret = s->oformat->write_packet(s, NULL);
1202 flush_if_needed(s);
1203 if (ret >= 0 && s->pb && s->pb->error < 0)
1204 ret = s->pb->error;
1205 return ret;
1206 }
1207 return 1;
1208 }
1209
1210 if (in->flags & AV_PKT_FLAG_UNCODED_FRAME) {
1211 pkt = in;
1212 } else {
1213 /* We don't own in, so we have to make sure not to modify it.
1214 * (ff_write_chained() relies on this fact.)
1215 * The following avoids copying in's data unnecessarily.
1216 * Copying side data is unavoidable as a bitstream filter
1217 * may change it, e.g. free it on errors. */
1218 pkt->data = in->data;
1219 pkt->size = in->size;
1220 ret = av_packet_copy_props(pkt, in);
1221 if (ret < 0)
1222 return ret;
1223 if (in->buf) {
1224 pkt->buf = av_buffer_ref(in->buf);
1225 if (!pkt->buf) {
1226 ret = AVERROR(ENOMEM);
1227 goto fail;
1228 }
1229 }
1230 }
1231
1232 ret = write_packets_common(s, pkt, 0/*non-interleaved*/);
1233
1234 fail:
1235 // Uncoded frames using the noninterleaved codepath are also freed here
1236 av_packet_unref(pkt);
1237 return ret;
1238 }
1239
av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)1240 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
1241 {
1242 int ret;
1243
1244 if (pkt) {
1245 ret = write_packets_common(s, pkt, 1/*interleaved*/);
1246 if (ret < 0)
1247 av_packet_unref(pkt);
1248 return ret;
1249 } else {
1250 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1251 return interleaved_write_packet(s, ffformatcontext(s)->parse_pkt, 1/*flush*/, 0);
1252 }
1253 }
1254
av_write_trailer(AVFormatContext *s)1255 int av_write_trailer(AVFormatContext *s)
1256 {
1257 FFFormatContext *const si = ffformatcontext(s);
1258 AVPacket *const pkt = si->parse_pkt;
1259 int ret1, ret = 0;
1260
1261 for (unsigned i = 0; i < s->nb_streams; i++) {
1262 AVStream *const st = s->streams[i];
1263 FFStream *const sti = ffstream(st);
1264 if (sti->bsfc) {
1265 ret1 = write_packets_from_bsfs(s, st, pkt, 1/*interleaved*/);
1266 if (ret1 < 0)
1267 av_packet_unref(pkt);
1268 if (ret >= 0)
1269 ret = ret1;
1270 }
1271 }
1272 ret1 = interleaved_write_packet(s, pkt, 1, 0);
1273 if (ret >= 0)
1274 ret = ret1;
1275
1276 if (s->oformat->write_trailer) {
1277 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1278 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_TRAILER);
1279 if (ret >= 0) {
1280 ret = s->oformat->write_trailer(s);
1281 } else {
1282 s->oformat->write_trailer(s);
1283 }
1284 }
1285
1286 deinit_muxer(s);
1287
1288 if (s->pb)
1289 avio_flush(s->pb);
1290 if (ret == 0)
1291 ret = s->pb ? s->pb->error : 0;
1292 for (unsigned i = 0; i < s->nb_streams; i++) {
1293 av_freep(&s->streams[i]->priv_data);
1294 av_freep(&ffstream(s->streams[i])->index_entries);
1295 }
1296 if (s->oformat->priv_class)
1297 av_opt_free(s->priv_data);
1298 av_freep(&s->priv_data);
1299 av_packet_unref(si->pkt);
1300 return ret;
1301 }
1302
av_get_output_timestamp(struct AVFormatContext *s, int stream, int64_t *dts, int64_t *wall)1303 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1304 int64_t *dts, int64_t *wall)
1305 {
1306 if (!s->oformat || !s->oformat->get_output_timestamp)
1307 return AVERROR(ENOSYS);
1308 s->oformat->get_output_timestamp(s, stream, dts, wall);
1309 return 0;
1310 }
1311
ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args)1312 int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args)
1313 {
1314 int ret;
1315 const AVBitStreamFilter *bsf;
1316 FFStream *const sti = ffstream(st);
1317 AVBSFContext *bsfc;
1318
1319 av_assert0(!sti->bsfc);
1320
1321 if (!(bsf = av_bsf_get_by_name(name))) {
1322 av_log(NULL, AV_LOG_ERROR, "Unknown bitstream filter '%s'\n", name);
1323 return AVERROR_BSF_NOT_FOUND;
1324 }
1325
1326 if ((ret = av_bsf_alloc(bsf, &bsfc)) < 0)
1327 return ret;
1328
1329 bsfc->time_base_in = st->time_base;
1330 if ((ret = avcodec_parameters_copy(bsfc->par_in, st->codecpar)) < 0) {
1331 av_bsf_free(&bsfc);
1332 return ret;
1333 }
1334
1335 if (args && bsfc->filter->priv_class) {
1336 if ((ret = av_set_options_string(bsfc->priv_data, args, "=", ":")) < 0) {
1337 av_bsf_free(&bsfc);
1338 return ret;
1339 }
1340 }
1341
1342 if ((ret = av_bsf_init(bsfc)) < 0) {
1343 av_bsf_free(&bsfc);
1344 return ret;
1345 }
1346
1347 sti->bsfc = bsfc;
1348
1349 av_log(NULL, AV_LOG_VERBOSE,
1350 "Automatically inserted bitstream filter '%s'; args='%s'\n",
1351 name, args ? args : "");
1352 return 1;
1353 }
1354
ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt, AVFormatContext *src, int interleave)1355 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1356 AVFormatContext *src, int interleave)
1357 {
1358 int64_t pts = pkt->pts, dts = pkt->dts, duration = pkt->duration;
1359 int stream_index = pkt->stream_index;
1360 AVRational time_base = pkt->time_base;
1361 int ret;
1362
1363 pkt->stream_index = dst_stream;
1364
1365 av_packet_rescale_ts(pkt,
1366 src->streams[stream_index]->time_base,
1367 dst->streams[dst_stream]->time_base);
1368
1369 if (!interleave) {
1370 ret = av_write_frame(dst, pkt);
1371 /* We only have to backup and restore the fields that
1372 * we changed ourselves, because av_write_frame() does not
1373 * modify the packet given to it. */
1374 pkt->pts = pts;
1375 pkt->dts = dts;
1376 pkt->duration = duration;
1377 pkt->stream_index = stream_index;
1378 pkt->time_base = time_base;
1379 } else
1380 ret = av_interleaved_write_frame(dst, pkt);
1381
1382 return ret;
1383 }
1384
uncoded_frame_free(void *unused, uint8_t *data)1385 static void uncoded_frame_free(void *unused, uint8_t *data)
1386 {
1387 av_frame_free((AVFrame **)data);
1388 av_free(data);
1389 }
1390
write_uncoded_frame_internal(AVFormatContext *s, int stream_index, AVFrame *frame, int interleaved)1391 static int write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1392 AVFrame *frame, int interleaved)
1393 {
1394 FFFormatContext *const si = ffformatcontext(s);
1395 AVPacket *pkt = si->parse_pkt;
1396
1397 av_assert0(s->oformat);
1398 if (!s->oformat->write_uncoded_frame) {
1399 av_frame_free(&frame);
1400 return AVERROR(ENOSYS);
1401 }
1402
1403 if (!frame) {
1404 pkt = NULL;
1405 } else {
1406 size_t bufsize = sizeof(frame) + AV_INPUT_BUFFER_PADDING_SIZE;
1407 AVFrame **framep = av_mallocz(bufsize);
1408
1409 if (!framep)
1410 goto fail;
1411 pkt->buf = av_buffer_create((void *)framep, bufsize,
1412 uncoded_frame_free, NULL, 0);
1413 if (!pkt->buf) {
1414 av_free(framep);
1415 fail:
1416 av_frame_free(&frame);
1417 return AVERROR(ENOMEM);
1418 }
1419 *framep = frame;
1420
1421 pkt->data = (void *)framep;
1422 pkt->size = sizeof(frame);
1423 pkt->pts =
1424 pkt->dts = frame->pts;
1425 pkt->duration = frame->pkt_duration;
1426 pkt->stream_index = stream_index;
1427 pkt->flags |= AV_PKT_FLAG_UNCODED_FRAME;
1428 }
1429
1430 return interleaved ? av_interleaved_write_frame(s, pkt) :
1431 av_write_frame(s, pkt);
1432 }
1433
av_write_uncoded_frame(AVFormatContext *s, int stream_index, AVFrame *frame)1434 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1435 AVFrame *frame)
1436 {
1437 return write_uncoded_frame_internal(s, stream_index, frame, 0);
1438 }
1439
av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index, AVFrame *frame)1440 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1441 AVFrame *frame)
1442 {
1443 return write_uncoded_frame_internal(s, stream_index, frame, 1);
1444 }
1445
av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)1446 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1447 {
1448 av_assert0(s->oformat);
1449 if (!s->oformat->write_uncoded_frame)
1450 return AVERROR(ENOSYS);
1451 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1452 AV_WRITE_UNCODED_FRAME_QUERY);
1453 }
1454