59f9c42cf1d76c8998b748573fe4dd53a928f5ac
[libav.git] / libavformat / mux.c
1 /*
2 * muxing functions for use within Libav
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; 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 "avio_internal.h"
24 #include "internal.h"
25 #include "libavcodec/internal.h"
26 #include "libavcodec/bytestream.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/pixdesc.h"
30 #include "metadata.h"
31 #include "id3v2.h"
32 #include "libavutil/avassert.h"
33 #include "libavutil/avstring.h"
34 #include "libavutil/internal.h"
35 #include "libavutil/mathematics.h"
36 #include "libavutil/parseutils.h"
37 #include "libavutil/time.h"
38 #include "riff.h"
39 #include "audiointerleave.h"
40 #include "url.h"
41 #include <stdarg.h>
42 #if CONFIG_NETWORK
43 #include "network.h"
44 #endif
45
46 #undef NDEBUG
47 #include <assert.h>
48
49 /**
50 * @file
51 * muxing functions for use within Libav
52 */
53
54 /* fraction handling */
55
56 /**
57 * f = val + (num / den) + 0.5.
58 *
59 * 'num' is normalized so that it is such as 0 <= num < den.
60 *
61 * @param f fractional number
62 * @param val integer value
63 * @param num must be >= 0
64 * @param den must be >= 1
65 */
66 static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den)
67 {
68 num += (den >> 1);
69 if (num >= den) {
70 val += num / den;
71 num = num % den;
72 }
73 f->val = val;
74 f->num = num;
75 f->den = den;
76 }
77
78 /**
79 * Fractional addition to f: f = f + (incr / f->den).
80 *
81 * @param f fractional number
82 * @param incr increment, can be positive or negative
83 */
84 static void frac_add(AVFrac *f, int64_t incr)
85 {
86 int64_t num, den;
87
88 num = f->num + incr;
89 den = f->den;
90 if (num < 0) {
91 f->val += num / den;
92 num = num % den;
93 if (num < 0) {
94 num += den;
95 f->val--;
96 }
97 } else if (num >= den) {
98 f->val += num / den;
99 num = num % den;
100 }
101 f->num = num;
102 }
103
104 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
105 {
106 const AVCodecTag *avctag;
107 int n;
108 enum AVCodecID id = AV_CODEC_ID_NONE;
109 unsigned int tag = 0;
110
111 /**
112 * Check that tag + id is in the table
113 * If neither is in the table -> OK
114 * If tag is in the table with another id -> FAIL
115 * If id is in the table with another tag -> FAIL unless strict < normal
116 */
117 for (n = 0; s->oformat->codec_tag[n]; n++) {
118 avctag = s->oformat->codec_tag[n];
119 while (avctag->id != AV_CODEC_ID_NONE) {
120 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) {
121 id = avctag->id;
122 if (id == st->codec->codec_id)
123 return 1;
124 }
125 if (avctag->id == st->codec->codec_id)
126 tag = avctag->tag;
127 avctag++;
128 }
129 }
130 if (id != AV_CODEC_ID_NONE)
131 return 0;
132 if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
133 return 0;
134 return 1;
135 }
136
137
138 static int init_muxer(AVFormatContext *s, AVDictionary **options)
139 {
140 int ret = 0, i;
141 AVStream *st;
142 AVDictionary *tmp = NULL;
143 AVCodecContext *codec = NULL;
144 AVOutputFormat *of = s->oformat;
145
146 if (options)
147 av_dict_copy(&tmp, *options, 0);
148
149 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
150 goto fail;
151
152 // some sanity checks
153 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
154 av_log(s, AV_LOG_ERROR, "no streams\n");
155 ret = AVERROR(EINVAL);
156 goto fail;
157 }
158
159 for (i = 0; i < s->nb_streams; i++) {
160 st = s->streams[i];
161 codec = st->codec;
162
163 switch (codec->codec_type) {
164 case AVMEDIA_TYPE_AUDIO:
165 if (codec->sample_rate <= 0) {
166 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
167 ret = AVERROR(EINVAL);
168 goto fail;
169 }
170 if (!codec->block_align)
171 codec->block_align = codec->channels *
172 av_get_bits_per_sample(codec->codec_id) >> 3;
173 break;
174 case AVMEDIA_TYPE_VIDEO:
175 if (codec->time_base.num <= 0 ||
176 codec->time_base.den <= 0) { //FIXME audio too?
177 av_log(s, AV_LOG_ERROR, "time base not set\n");
178 ret = AVERROR(EINVAL);
179 goto fail;
180 }
181
182 if ((codec->width <= 0 || codec->height <= 0) &&
183 !(of->flags & AVFMT_NODIMENSIONS)) {
184 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
185 ret = AVERROR(EINVAL);
186 goto fail;
187 }
188
189 if (av_cmp_q(st->sample_aspect_ratio,
190 codec->sample_aspect_ratio)) {
191 if (st->sample_aspect_ratio.num != 0 &&
192 st->sample_aspect_ratio.den != 0 &&
193 codec->sample_aspect_ratio.den != 0 &&
194 codec->sample_aspect_ratio.den != 0) {
195 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
196 "(%d/%d) and encoder layer (%d/%d)\n",
197 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
198 codec->sample_aspect_ratio.num,
199 codec->sample_aspect_ratio.den);
200 ret = AVERROR(EINVAL);
201 goto fail;
202 }
203 }
204 break;
205 }
206
207 if (of->codec_tag) {
208 if (codec->codec_tag &&
209 codec->codec_id == AV_CODEC_ID_RAWVIDEO &&
210 !av_codec_get_tag(of->codec_tag, codec->codec_id) &&
211 !validate_codec_tag(s, st)) {
212 // the current rawvideo encoding system ends up setting
213 // the wrong codec_tag for avi, we override it here
214 codec->codec_tag = 0;
215 }
216 if (codec->codec_tag) {
217 if (!validate_codec_tag(s, st)) {
218 char tagbuf[32];
219 av_get_codec_tag_string(tagbuf, sizeof(tagbuf), codec->codec_tag);
220 av_log(s, AV_LOG_ERROR,
221 "Tag %s/0x%08x incompatible with output codec id '%d'\n",
222 tagbuf, codec->codec_tag, codec->codec_id);
223 ret = AVERROR_INVALIDDATA;
224 goto fail;
225 }
226 } else
227 codec->codec_tag = av_codec_get_tag(of->codec_tag, codec->codec_id);
228 }
229
230 if (of->flags & AVFMT_GLOBALHEADER &&
231 !(codec->flags & CODEC_FLAG_GLOBAL_HEADER))
232 av_log(s, AV_LOG_WARNING,
233 "Codec for stream %d does not use global headers "
234 "but container format requires global headers\n", i);
235
236 if (codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
237 s->internal->nb_interleaved_streams++;
238 }
239
240 if (!s->priv_data && of->priv_data_size > 0) {
241 s->priv_data = av_mallocz(of->priv_data_size);
242 if (!s->priv_data) {
243 ret = AVERROR(ENOMEM);
244 goto fail;
245 }
246 if (of->priv_class) {
247 *(const AVClass **)s->priv_data = of->priv_class;
248 av_opt_set_defaults(s->priv_data);
249 if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
250 goto fail;
251 }
252 }
253
254 /* set muxer identification string */
255 if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
256 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
257 }
258
259 if (options) {
260 av_dict_free(options);
261 *options = tmp;
262 }
263
264 return 0;
265
266 fail:
267 av_dict_free(&tmp);
268 return ret;
269 }
270
271 static int init_pts(AVFormatContext *s)
272 {
273 int i;
274 AVStream *st;
275
276 /* init PTS generation */
277 for (i = 0; i < s->nb_streams; i++) {
278 int64_t den = AV_NOPTS_VALUE;
279 st = s->streams[i];
280
281 switch (st->codec->codec_type) {
282 case AVMEDIA_TYPE_AUDIO:
283 den = (int64_t)st->time_base.num * st->codec->sample_rate;
284 break;
285 case AVMEDIA_TYPE_VIDEO:
286 den = (int64_t)st->time_base.num * st->codec->time_base.den;
287 break;
288 default:
289 break;
290 }
291 if (den != AV_NOPTS_VALUE) {
292 if (den <= 0)
293 return AVERROR_INVALIDDATA;
294
295 frac_init(&st->pts, 0, 0, den);
296 }
297 }
298
299 return 0;
300 }
301
302 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
303 {
304 int ret = 0;
305
306 if (ret = init_muxer(s, options))
307 return ret;
308
309 if (s->oformat->write_header) {
310 ret = s->oformat->write_header(s);
311 if (ret < 0)
312 return ret;
313 }
314
315 if ((ret = init_pts(s)) < 0)
316 return ret;
317
318 return 0;
319 }
320
321 //FIXME merge with compute_pkt_fields
322 static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt)
323 {
324 int delay = FFMAX(st->codec->has_b_frames, !!st->codec->max_b_frames);
325 int num, den, frame_size, i;
326
327 av_dlog(s, "compute_pkt_fields2: pts:%" PRId64 " dts:%" PRId64 " cur_dts:%" PRId64 " b:%d size:%d st:%d\n",
328 pkt->pts, pkt->dts, st->cur_dts, delay, pkt->size, pkt->stream_index);
329
330 /* if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
331 * return AVERROR(EINVAL);*/
332
333 /* duration field */
334 if (pkt->duration == 0) {
335 ff_compute_frame_duration(&num, &den, st, NULL, pkt);
336 if (den && num) {
337 pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num);
338 }
339 }
340
341 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
342 pkt->pts = pkt->dts;
343
344 //XXX/FIXME this is a temporary hack until all encoders output pts
345 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
346 pkt->dts =
347 // pkt->pts= st->cur_dts;
348 pkt->pts = st->pts.val;
349 }
350
351 //calculate dts from pts
352 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
353 st->pts_buffer[0] = pkt->pts;
354 for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++)
355 st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
356 for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
357 FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
358
359 pkt->dts = st->pts_buffer[0];
360 }
361
362 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
363 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
364 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
365 av_log(s, AV_LOG_ERROR,
366 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
367 st->index, st->cur_dts, pkt->dts);
368 return AVERROR(EINVAL);
369 }
370 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
371 av_log(s, AV_LOG_ERROR, "pts < dts in stream %d\n", st->index);
372 return AVERROR(EINVAL);
373 }
374
375 av_dlog(s, "av_write_frame: pts2:%"PRId64" dts2:%"PRId64"\n",
376 pkt->pts, pkt->dts);
377 st->cur_dts = pkt->dts;
378 st->pts.val = pkt->dts;
379
380 /* update pts */
381 switch (st->codec->codec_type) {
382 case AVMEDIA_TYPE_AUDIO:
383 frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 1);
384
385 /* HACK/FIXME, we skip the initial 0 size packets as they are most
386 * likely equal to the encoder delay, but it would be better if we
387 * had the real timestamps from the encoder */
388 if (frame_size >= 0 && (pkt->size || st->pts.num != st->pts.den >> 1 || st->pts.val)) {
389 frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
390 }
391 break;
392 case AVMEDIA_TYPE_VIDEO:
393 frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num);
394 break;
395 default:
396 break;
397 }
398 return 0;
399 }
400
401 /*
402 * FIXME: this function should NEVER get undefined pts/dts beside when the
403 * AVFMT_NOTIMESTAMPS is set.
404 * Those additional safety checks should be dropped once the correct checks
405 * are set in the callers.
406 */
407
408 static int write_packet(AVFormatContext *s, AVPacket *pkt)
409 {
410 int ret;
411 if (!(s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS))) {
412 AVRational time_base = s->streams[pkt->stream_index]->time_base;
413 int64_t offset = 0;
414
415 if (!s->offset && pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
416 s->offset = -pkt->dts;
417 s->offset_timebase = time_base;
418 }
419 if (s->offset)
420 offset = av_rescale_q(s->offset, s->offset_timebase, time_base);
421
422 if (pkt->dts != AV_NOPTS_VALUE)
423 pkt->dts += offset;
424 if (pkt->pts != AV_NOPTS_VALUE)
425 pkt->pts += offset;
426 }
427 ret = s->oformat->write_packet(s, pkt);
428
429 if (s->pb && ret >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS)
430 avio_flush(s->pb);
431
432 return ret;
433 }
434
435 static int check_packet(AVFormatContext *s, AVPacket *pkt)
436 {
437 if (!pkt)
438 return 0;
439
440 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
441 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
442 pkt->stream_index);
443 return AVERROR(EINVAL);
444 }
445
446 if (s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
447 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
448 return AVERROR(EINVAL);
449 }
450
451 return 0;
452 }
453
454 int av_write_frame(AVFormatContext *s, AVPacket *pkt)
455 {
456 int ret;
457
458 ret = check_packet(s, pkt);
459 if (ret < 0)
460 return ret;
461
462 if (!pkt) {
463 if (s->oformat->flags & AVFMT_ALLOW_FLUSH)
464 return s->oformat->write_packet(s, pkt);
465 return 1;
466 }
467
468 ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt);
469
470 if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
471 return ret;
472
473 ret = write_packet(s, pkt);
474
475 if (ret >= 0)
476 s->streams[pkt->stream_index]->nb_frames++;
477 return ret;
478 }
479
480 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
481 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *))
482 {
483 AVPacketList **next_point, *this_pktl;
484
485 this_pktl = av_mallocz(sizeof(AVPacketList));
486 this_pktl->pkt = *pkt;
487 #if FF_API_DESTRUCT_PACKET
488 FF_DISABLE_DEPRECATION_WARNINGS
489 pkt->destruct = NULL; // do not free original but only the copy
490 FF_ENABLE_DEPRECATION_WARNINGS
491 #endif
492 pkt->buf = NULL;
493 av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
494
495 if (s->streams[pkt->stream_index]->last_in_packet_buffer) {
496 next_point = &(s->streams[pkt->stream_index]->last_in_packet_buffer->next);
497 } else
498 next_point = &s->packet_buffer;
499
500 if (*next_point) {
501 if (compare(s, &s->packet_buffer_end->pkt, pkt)) {
502 while (!compare(s, &(*next_point)->pkt, pkt))
503 next_point = &(*next_point)->next;
504 goto next_non_null;
505 } else {
506 next_point = &(s->packet_buffer_end->next);
507 }
508 }
509 assert(!*next_point);
510
511 s->packet_buffer_end = this_pktl;
512 next_non_null:
513
514 this_pktl->next = *next_point;
515
516 s->streams[pkt->stream_index]->last_in_packet_buffer =
517 *next_point = this_pktl;
518 }
519
520 static int interleave_compare_dts(AVFormatContext *s, AVPacket *next,
521 AVPacket *pkt)
522 {
523 AVStream *st = s->streams[pkt->stream_index];
524 AVStream *st2 = s->streams[next->stream_index];
525 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
526 st->time_base);
527
528 if (comp == 0)
529 return pkt->stream_index < next->stream_index;
530 return comp > 0;
531 }
532
533 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
534 AVPacket *pkt, int flush)
535 {
536 AVPacketList *pktl;
537 int stream_count = 0;
538 int i;
539
540 if (pkt) {
541 ff_interleave_add_packet(s, pkt, interleave_compare_dts);
542 }
543
544 if (s->max_interleave_delta > 0 && s->packet_buffer && !flush) {
545 AVPacket *top_pkt = &s->packet_buffer->pkt;
546 int64_t delta_dts = INT64_MIN;
547 int64_t top_dts = av_rescale_q(top_pkt->dts,
548 s->streams[top_pkt->stream_index]->time_base,
549 AV_TIME_BASE_Q);
550
551 for (i = 0; i < s->nb_streams; i++) {
552 int64_t last_dts;
553 const AVPacketList *last = s->streams[i]->last_in_packet_buffer;
554
555 if (!last)
556 continue;
557
558 last_dts = av_rescale_q(last->pkt.dts,
559 s->streams[i]->time_base,
560 AV_TIME_BASE_Q);
561 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
562 stream_count++;
563 }
564
565 if (delta_dts > s->max_interleave_delta) {
566 av_log(s, AV_LOG_DEBUG,
567 "Delay between the first packet and last packet in the "
568 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
569 delta_dts, s->max_interleave_delta);
570 flush = 1;
571 }
572 } else {
573 for (i = 0; i < s->nb_streams; i++)
574 stream_count += !!s->streams[i]->last_in_packet_buffer;
575 }
576
577
578 if (stream_count && (s->internal->nb_interleaved_streams == stream_count || flush)) {
579 pktl = s->packet_buffer;
580 *out = pktl->pkt;
581
582 s->packet_buffer = pktl->next;
583 if (!s->packet_buffer)
584 s->packet_buffer_end = NULL;
585
586 if (s->streams[out->stream_index]->last_in_packet_buffer == pktl)
587 s->streams[out->stream_index]->last_in_packet_buffer = NULL;
588 av_freep(&pktl);
589 return 1;
590 } else {
591 av_init_packet(out);
592 return 0;
593 }
594 }
595
596 /**
597 * Interleave an AVPacket correctly so it can be muxed.
598 * @param out the interleaved packet will be output here
599 * @param in the input packet
600 * @param flush 1 if no further packets are available as input and all
601 * remaining packets should be output
602 * @return 1 if a packet was output, 0 if no packet could be output,
603 * < 0 if an error occurred
604 */
605 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
606 {
607 if (s->oformat->interleave_packet) {
608 int ret = s->oformat->interleave_packet(s, out, in, flush);
609 if (in)
610 av_free_packet(in);
611 return ret;
612 } else
613 return ff_interleave_packet_per_dts(s, out, in, flush);
614 }
615
616 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
617 {
618 int ret, flush = 0;
619
620 ret = check_packet(s, pkt);
621 if (ret < 0)
622 goto fail;
623
624 if (pkt) {
625 AVStream *st = s->streams[pkt->stream_index];
626
627 //FIXME/XXX/HACK drop zero sized packets
628 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size == 0) {
629 ret = 0;
630 goto fail;
631 }
632
633 av_dlog(s, "av_interleaved_write_frame size:%d dts:%" PRId64 " pts:%" PRId64 "\n",
634 pkt->size, pkt->dts, pkt->pts);
635 if ((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
636 goto fail;
637
638 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
639 ret = AVERROR(EINVAL);
640 goto fail;
641 }
642 } else {
643 av_dlog(s, "av_interleaved_write_frame FLUSH\n");
644 flush = 1;
645 }
646
647 for (;; ) {
648 AVPacket opkt;
649 int ret = interleave_packet(s, &opkt, pkt, flush);
650 if (pkt) {
651 memset(pkt, 0, sizeof(*pkt));
652 av_init_packet(pkt);
653 pkt = NULL;
654 }
655 if (ret <= 0) //FIXME cleanup needed for ret<0 ?
656 return ret;
657
658 ret = write_packet(s, &opkt);
659 if (ret >= 0)
660 s->streams[opkt.stream_index]->nb_frames++;
661
662 av_free_packet(&opkt);
663
664 if (ret < 0)
665 return ret;
666 }
667 fail:
668 av_packet_unref(pkt);
669 return ret;
670 }
671
672 int av_write_trailer(AVFormatContext *s)
673 {
674 int ret, i;
675
676 for (;; ) {
677 AVPacket pkt;
678 ret = interleave_packet(s, &pkt, NULL, 1);
679 if (ret < 0) //FIXME cleanup needed for ret<0 ?
680 goto fail;
681 if (!ret)
682 break;
683
684 ret = write_packet(s, &pkt);
685 if (ret >= 0)
686 s->streams[pkt.stream_index]->nb_frames++;
687
688 av_free_packet(&pkt);
689
690 if (ret < 0)
691 goto fail;
692 }
693
694 if (s->oformat->write_trailer)
695 ret = s->oformat->write_trailer(s);
696
697 if (!(s->oformat->flags & AVFMT_NOFILE))
698 avio_flush(s->pb);
699
700 fail:
701 for (i = 0; i < s->nb_streams; i++) {
702 av_freep(&s->streams[i]->priv_data);
703 av_freep(&s->streams[i]->index_entries);
704 }
705 if (s->oformat->priv_class)
706 av_opt_free(s->priv_data);
707 av_freep(&s->priv_data);
708 return ret;
709 }
710
711 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
712 AVFormatContext *src)
713 {
714 AVPacket local_pkt;
715
716 local_pkt = *pkt;
717 local_pkt.stream_index = dst_stream;
718 if (pkt->pts != AV_NOPTS_VALUE)
719 local_pkt.pts = av_rescale_q(pkt->pts,
720 src->streams[pkt->stream_index]->time_base,
721 dst->streams[dst_stream]->time_base);
722 if (pkt->dts != AV_NOPTS_VALUE)
723 local_pkt.dts = av_rescale_q(pkt->dts,
724 src->streams[pkt->stream_index]->time_base,
725 dst->streams[dst_stream]->time_base);
726 return av_write_frame(dst, &local_pkt);
727 }