2 * muxing functions for use within FFmpeg
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
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.
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.
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
24 #include "libavcodec/internal.h"
25 #include "libavcodec/packet_internal.h"
26 #include "libavutil/opt.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/pixdesc.h"
29 #include "libavutil/timestamp.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/mathematics.h"
37 * muxing functions for use within libavformat
40 /* fraction handling */
43 * f = val + (num / den) + 0.5.
45 * 'num' is normalized so that it is such as 0 <= num < den.
47 * @param f fractional number
48 * @param val integer value
49 * @param num must be >= 0
50 * @param den must be >= 1
52 static void frac_init(FFFrac *f, int64_t val, int64_t num, int64_t den)
65 * Fractional addition to f: f = f + (incr / f->den).
67 * @param f fractional number
68 * @param incr increment, can be positive or negative
70 static void frac_add(FFFrac *f, int64_t incr)
83 } else if (num >= den) {
90 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
97 for (j=2; j<14; j+= 1+(j>2))
98 while (q.den / q.num < min_precision && q.num % j == 0)
100 while (q.den / q.num < min_precision && q.den < (1<<24))
106 enum AVChromaLocation ff_choose_chroma_location(AVFormatContext *s, AVStream *st)
108 AVCodecParameters *par = st->codecpar;
109 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(par->format);
111 if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED)
112 return par->chroma_location;
115 if (pix_desc->log2_chroma_h == 0) {
116 return AVCHROMA_LOC_TOPLEFT;
117 } else if (pix_desc->log2_chroma_w == 1 && pix_desc->log2_chroma_h == 1) {
118 if (par->field_order == AV_FIELD_UNKNOWN || par->field_order == AV_FIELD_PROGRESSIVE) {
119 switch (par->codec_id) {
120 case AV_CODEC_ID_MJPEG:
121 case AV_CODEC_ID_MPEG1VIDEO: return AVCHROMA_LOC_CENTER;
124 if (par->field_order == AV_FIELD_UNKNOWN || par->field_order != AV_FIELD_PROGRESSIVE) {
125 switch (par->codec_id) {
126 case AV_CODEC_ID_MPEG2VIDEO: return AVCHROMA_LOC_LEFT;
132 return AVCHROMA_LOC_UNSPECIFIED;
136 int avformat_alloc_output_context2(AVFormatContext **avctx, const AVOutputFormat *oformat,
137 const char *format, const char *filename)
139 AVFormatContext *s = avformat_alloc_context();
148 oformat = av_guess_format(format, NULL, NULL);
150 av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format);
151 ret = AVERROR(EINVAL);
155 oformat = av_guess_format(NULL, filename, NULL);
157 ret = AVERROR(EINVAL);
158 av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n",
165 s->oformat = oformat;
166 if (s->oformat->priv_data_size > 0) {
167 s->priv_data = av_mallocz(s->oformat->priv_data_size);
170 if (s->oformat->priv_class) {
171 *(const AVClass**)s->priv_data= s->oformat->priv_class;
172 av_opt_set_defaults(s->priv_data);
178 if (!(s->url = av_strdup(filename)))
185 av_log(s, AV_LOG_ERROR, "Out of memory\n");
186 ret = AVERROR(ENOMEM);
188 avformat_free_context(s);
192 static int validate_codec_tag(AVFormatContext *s, AVStream *st)
194 const AVCodecTag *avctag;
196 enum AVCodecID id = AV_CODEC_ID_NONE;
200 * Check that tag + id is in the table
201 * If neither is in the table -> OK
202 * If tag is in the table with another id -> FAIL
203 * If id is in the table with another tag -> FAIL unless strict < normal
205 for (n = 0; s->oformat->codec_tag[n]; n++) {
206 avctag = s->oformat->codec_tag[n];
207 while (avctag->id != AV_CODEC_ID_NONE) {
208 if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codecpar->codec_tag)) {
210 if (id == st->codecpar->codec_id)
213 if (avctag->id == st->codecpar->codec_id)
218 if (id != AV_CODEC_ID_NONE)
220 if (tag >= 0 && (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL))
226 static int init_muxer(AVFormatContext *s, AVDictionary **options)
230 AVDictionary *tmp = NULL;
231 AVCodecParameters *par = NULL;
232 const AVOutputFormat *of = s->oformat;
233 const AVCodecDescriptor *desc;
234 AVDictionaryEntry *e;
237 av_dict_copy(&tmp, *options, 0);
239 if ((ret = av_opt_set_dict(s, &tmp)) < 0)
241 if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class &&
242 (ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
245 if (!s->url && !(s->url = av_strdup(""))) {
246 ret = AVERROR(ENOMEM);
250 #if FF_API_LAVF_AVCTX
251 FF_DISABLE_DEPRECATION_WARNINGS
252 if (s->nb_streams && s->streams[0]->codec->flags & AV_CODEC_FLAG_BITEXACT) {
253 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
254 av_log(s, AV_LOG_WARNING,
255 "The AVFormatContext is not in set to bitexact mode, only "
256 "the AVCodecContext. If this is not intended, set "
257 "AVFormatContext.flags |= AVFMT_FLAG_BITEXACT.\n");
260 FF_ENABLE_DEPRECATION_WARNINGS
263 // some sanity checks
264 if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) {
265 av_log(s, AV_LOG_ERROR, "No streams to mux were specified\n");
266 ret = AVERROR(EINVAL);
270 for (i = 0; i < s->nb_streams; i++) {
274 #if FF_API_LAVF_AVCTX
275 FF_DISABLE_DEPRECATION_WARNINGS
276 if (st->codecpar->codec_type == AVMEDIA_TYPE_UNKNOWN &&
277 st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) {
278 av_log(s, AV_LOG_WARNING, "Using AVStream.codec to pass codec "
279 "parameters to muxers is deprecated, use AVStream.codecpar "
281 ret = avcodec_parameters_from_context(st->codecpar, st->codec);
285 FF_ENABLE_DEPRECATION_WARNINGS
288 if (!st->time_base.num) {
289 /* fall back on the default timebase values */
290 if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->sample_rate)
291 avpriv_set_pts_info(st, 64, 1, par->sample_rate);
293 avpriv_set_pts_info(st, 33, 1, 90000);
296 switch (par->codec_type) {
297 case AVMEDIA_TYPE_AUDIO:
298 if (par->sample_rate <= 0) {
299 av_log(s, AV_LOG_ERROR, "sample rate not set\n");
300 ret = AVERROR(EINVAL);
303 if (!par->block_align)
304 par->block_align = par->channels *
305 av_get_bits_per_sample(par->codec_id) >> 3;
307 case AVMEDIA_TYPE_VIDEO:
308 if ((par->width <= 0 || par->height <= 0) &&
309 !(of->flags & AVFMT_NODIMENSIONS)) {
310 av_log(s, AV_LOG_ERROR, "dimensions not set\n");
311 ret = AVERROR(EINVAL);
314 if (av_cmp_q(st->sample_aspect_ratio, par->sample_aspect_ratio)
315 && fabs(av_q2d(st->sample_aspect_ratio) - av_q2d(par->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio)
317 if (st->sample_aspect_ratio.num != 0 &&
318 st->sample_aspect_ratio.den != 0 &&
319 par->sample_aspect_ratio.num != 0 &&
320 par->sample_aspect_ratio.den != 0) {
321 av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer "
322 "(%d/%d) and encoder layer (%d/%d)\n",
323 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den,
324 par->sample_aspect_ratio.num,
325 par->sample_aspect_ratio.den);
326 ret = AVERROR(EINVAL);
333 desc = avcodec_descriptor_get(par->codec_id);
334 if (desc && desc->props & AV_CODEC_PROP_REORDER)
335 st->internal->reorder = 1;
337 st->internal->is_intra_only = ff_is_intra_only(par->codec_id);
341 && par->codec_id == AV_CODEC_ID_RAWVIDEO
342 && ( av_codec_get_tag(of->codec_tag, par->codec_id) == 0
343 || av_codec_get_tag(of->codec_tag, par->codec_id) == MKTAG('r', 'a', 'w', ' '))
344 && !validate_codec_tag(s, st)) {
345 // the current rawvideo encoding system ends up setting
346 // the wrong codec_tag for avi/mov, we override it here
349 if (par->codec_tag) {
350 if (!validate_codec_tag(s, st)) {
351 const uint32_t otag = av_codec_get_tag(s->oformat->codec_tag, par->codec_id);
352 av_log(s, AV_LOG_ERROR,
353 "Tag %s incompatible with output codec id '%d' (%s)\n",
354 av_fourcc2str(par->codec_tag), par->codec_id, av_fourcc2str(otag));
355 ret = AVERROR_INVALIDDATA;
359 par->codec_tag = av_codec_get_tag(of->codec_tag, par->codec_id);
362 if (par->codec_type != AVMEDIA_TYPE_ATTACHMENT)
363 s->internal->nb_interleaved_streams++;
366 if (!s->priv_data && of->priv_data_size > 0) {
367 s->priv_data = av_mallocz(of->priv_data_size);
369 ret = AVERROR(ENOMEM);
372 if (of->priv_class) {
373 *(const AVClass **)s->priv_data = of->priv_class;
374 av_opt_set_defaults(s->priv_data);
375 if ((ret = av_opt_set_dict2(s->priv_data, &tmp, AV_OPT_SEARCH_CHILDREN)) < 0)
380 /* set muxer identification string */
381 if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
382 av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0);
384 av_dict_set(&s->metadata, "encoder", NULL, 0);
387 for (e = NULL; e = av_dict_get(s->metadata, "encoder-", e, AV_DICT_IGNORE_SUFFIX); ) {
388 av_dict_set(&s->metadata, e->key, NULL, 0);
392 av_dict_free(options);
396 if (s->oformat->init) {
397 if ((ret = s->oformat->init(s)) < 0) {
398 if (s->oformat->deinit)
399 s->oformat->deinit(s);
412 static int init_pts(AVFormatContext *s)
417 /* init PTS generation */
418 for (i = 0; i < s->nb_streams; i++) {
419 int64_t den = AV_NOPTS_VALUE;
422 switch (st->codecpar->codec_type) {
423 case AVMEDIA_TYPE_AUDIO:
424 den = (int64_t)st->time_base.num * st->codecpar->sample_rate;
426 case AVMEDIA_TYPE_VIDEO:
427 den = (int64_t)st->time_base.num * st->time_base.den;
433 if (!st->internal->priv_pts)
434 st->internal->priv_pts = av_mallocz(sizeof(*st->internal->priv_pts));
435 if (!st->internal->priv_pts)
436 return AVERROR(ENOMEM);
438 if (den != AV_NOPTS_VALUE) {
440 return AVERROR_INVALIDDATA;
442 frac_init(st->internal->priv_pts, 0, 0, den);
446 if (s->avoid_negative_ts < 0) {
447 av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
448 if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
449 s->avoid_negative_ts = 0;
451 s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
457 static void flush_if_needed(AVFormatContext *s)
459 if (s->pb && s->pb->error >= 0) {
460 if (s->flush_packets == 1 || s->flags & AVFMT_FLAG_FLUSH_PACKETS)
462 else if (s->flush_packets && !(s->oformat->flags & AVFMT_NOFILE))
463 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
467 static void deinit_muxer(AVFormatContext *s)
469 if (s->oformat && s->oformat->deinit && s->internal->initialized)
470 s->oformat->deinit(s);
471 s->internal->initialized =
472 s->internal->streams_initialized = 0;
475 int avformat_init_output(AVFormatContext *s, AVDictionary **options)
479 if ((ret = init_muxer(s, options)) < 0)
482 s->internal->initialized = 1;
483 s->internal->streams_initialized = ret;
485 if (s->oformat->init && ret) {
486 if ((ret = init_pts(s)) < 0)
489 return AVSTREAM_INIT_IN_INIT_OUTPUT;
492 return AVSTREAM_INIT_IN_WRITE_HEADER;
495 int avformat_write_header(AVFormatContext *s, AVDictionary **options)
498 int already_initialized = s->internal->initialized;
499 int streams_already_initialized = s->internal->streams_initialized;
501 if (!already_initialized)
502 if ((ret = avformat_init_output(s, options)) < 0)
505 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
506 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_HEADER);
507 if (s->oformat->write_header) {
508 ret = s->oformat->write_header(s);
509 if (ret >= 0 && s->pb && s->pb->error < 0)
515 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
516 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_UNKNOWN);
518 if (!s->internal->streams_initialized) {
519 if ((ret = init_pts(s)) < 0)
523 return streams_already_initialized;
530 #define AV_PKT_FLAG_UNCODED_FRAME 0x2000
533 #if FF_API_COMPUTE_PKT_FIELDS2
534 FF_DISABLE_DEPRECATION_WARNINGS
535 //FIXME merge with compute_pkt_fields
536 static int compute_muxer_pkt_fields(AVFormatContext *s, AVStream *st, AVPacket *pkt)
538 int delay = FFMAX(st->codecpar->video_delay, st->internal->avctx->max_b_frames > 0);
542 if (!s->internal->missing_ts_warning &&
543 !(s->oformat->flags & AVFMT_NOTIMESTAMPS) &&
544 (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC) || (st->disposition & AV_DISPOSITION_TIMED_THUMBNAILS)) &&
545 (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE)) {
546 av_log(s, AV_LOG_WARNING,
547 "Timestamps are unset in a packet for stream %d. "
548 "This is deprecated and will stop working in the future. "
549 "Fix your code to set the timestamps properly\n", st->index);
550 s->internal->missing_ts_warning = 1;
553 if (s->debug & FF_FDEBUG_TS)
554 av_log(s, AV_LOG_DEBUG, "compute_muxer_pkt_fields: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n",
555 av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index);
557 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0)
560 //XXX/FIXME this is a temporary hack until all encoders output pts
561 if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) {
564 av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n");
568 // pkt->pts= st->cur_dts;
569 pkt->pts = st->internal->priv_pts->val;
572 //calculate dts from pts
573 if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
574 st->internal->pts_buffer[0] = pkt->pts;
575 for (i = 1; i < delay + 1 && st->internal->pts_buffer[i] == AV_NOPTS_VALUE; i++)
576 st->internal->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration;
577 for (i = 0; i<delay && st->internal->pts_buffer[i] > st->internal->pts_buffer[i + 1]; i++)
578 FFSWAP(int64_t, st->internal->pts_buffer[i], st->internal->pts_buffer[i + 1]);
580 pkt->dts = st->internal->pts_buffer[0];
583 if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE &&
584 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) &&
585 st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE &&
586 st->codecpar->codec_type != AVMEDIA_TYPE_DATA &&
587 st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) {
588 av_log(s, AV_LOG_ERROR,
589 "Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n",
590 st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts));
591 return AVERROR(EINVAL);
593 if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) {
594 av_log(s, AV_LOG_ERROR,
595 "pts (%s) < dts (%s) in stream %d\n",
596 av_ts2str(pkt->pts), av_ts2str(pkt->dts),
598 return AVERROR(EINVAL);
601 if (s->debug & FF_FDEBUG_TS)
602 av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%s dts2:%s\n",
603 av_ts2str(pkt->pts), av_ts2str(pkt->dts));
605 st->cur_dts = pkt->dts;
606 st->internal->priv_pts->val = pkt->dts;
609 switch (st->codecpar->codec_type) {
610 case AVMEDIA_TYPE_AUDIO:
611 frame_size = (pkt->flags & AV_PKT_FLAG_UNCODED_FRAME) ?
612 (*(AVFrame **)pkt->data)->nb_samples :
613 av_get_audio_frame_duration2(st->codecpar, pkt->size);
615 /* HACK/FIXME, we skip the initial 0 size packets as they are most
616 * likely equal to the encoder delay, but it would be better if we
617 * had the real timestamps from the encoder */
618 if (frame_size >= 0 && (pkt->size || st->internal->priv_pts->num != st->internal->priv_pts->den >> 1 || st->internal->priv_pts->val)) {
619 frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * frame_size);
622 case AVMEDIA_TYPE_VIDEO:
623 frac_add(st->internal->priv_pts, (int64_t)st->time_base.den * st->time_base.num);
628 FF_ENABLE_DEPRECATION_WARNINGS
631 static void guess_pkt_duration(AVFormatContext *s, AVStream *st, AVPacket *pkt)
633 if (pkt->duration < 0 && st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
634 av_log(s, AV_LOG_WARNING, "Packet with invalid duration %"PRId64" in stream %d\n",
635 pkt->duration, pkt->stream_index);
642 switch (st->codecpar->codec_type) {
643 case AVMEDIA_TYPE_VIDEO:
644 if (st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0) {
645 pkt->duration = av_rescale_q(1, av_inv_q(st->avg_frame_rate),
647 } else if (st->time_base.num * 1000LL > st->time_base.den)
650 case AVMEDIA_TYPE_AUDIO: {
651 int frame_size = av_get_audio_frame_duration2(st->codecpar, pkt->size);
652 if (frame_size && st->codecpar->sample_rate) {
653 pkt->duration = av_rescale_q(frame_size,
654 (AVRational){1, st->codecpar->sample_rate},
663 * Shift timestamps and call muxer; the original pts/dts are not kept.
665 * FIXME: this function should NEVER get undefined pts/dts beside when the
666 * AVFMT_NOTIMESTAMPS is set.
667 * Those additional safety checks should be dropped once the correct checks
668 * are set in the callers.
670 static int write_packet(AVFormatContext *s, AVPacket *pkt)
674 // If the timestamp offsetting below is adjusted, adjust
675 // ff_interleaved_peek similarly.
676 if (s->output_ts_offset) {
677 AVStream *st = s->streams[pkt->stream_index];
678 int64_t offset = av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
680 if (pkt->dts != AV_NOPTS_VALUE)
682 if (pkt->pts != AV_NOPTS_VALUE)
686 if (s->avoid_negative_ts > 0) {
687 AVStream *st = s->streams[pkt->stream_index];
688 int64_t offset = st->internal->mux_ts_offset;
689 int64_t ts = s->internal->avoid_negative_ts_use_pts ? pkt->pts : pkt->dts;
691 if (s->internal->offset == AV_NOPTS_VALUE && ts != AV_NOPTS_VALUE &&
692 (ts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
693 s->internal->offset = -ts;
694 s->internal->offset_timebase = st->time_base;
697 if (s->internal->offset != AV_NOPTS_VALUE && !offset) {
698 offset = st->internal->mux_ts_offset =
699 av_rescale_q_rnd(s->internal->offset,
700 s->internal->offset_timebase,
705 if (pkt->dts != AV_NOPTS_VALUE)
707 if (pkt->pts != AV_NOPTS_VALUE)
710 if (s->internal->avoid_negative_ts_use_pts) {
711 if (pkt->pts != AV_NOPTS_VALUE && pkt->pts < 0) {
712 av_log(s, AV_LOG_WARNING, "failed to avoid negative "
713 "pts %s in stream %d.\n"
714 "Try -avoid_negative_ts 1 as a possible workaround.\n",
720 av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0 || s->max_interleave_delta > 0);
721 if (pkt->dts != AV_NOPTS_VALUE && pkt->dts < 0) {
722 av_log(s, AV_LOG_WARNING,
723 "Packets poorly interleaved, failed to avoid negative "
724 "timestamp %s in stream %d.\n"
725 "Try -max_interleave_delta 0 as a possible workaround.\n",
733 if ((pkt->flags & AV_PKT_FLAG_UNCODED_FRAME)) {
734 AVFrame **frame = (AVFrame **)pkt->data;
735 av_assert0(pkt->size == sizeof(*frame));
736 ret = s->oformat->write_uncoded_frame(s, pkt->stream_index, frame, 0);
738 ret = s->oformat->write_packet(s, pkt);
741 if (s->pb && ret >= 0) {
743 if (s->pb->error < 0)
748 s->streams[pkt->stream_index]->nb_frames++;
753 static int check_packet(AVFormatContext *s, AVPacket *pkt)
755 if (pkt->stream_index < 0 || pkt->stream_index >= s->nb_streams) {
756 av_log(s, AV_LOG_ERROR, "Invalid packet stream index: %d\n",
758 return AVERROR(EINVAL);
761 if (s->streams[pkt->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
762 av_log(s, AV_LOG_ERROR, "Received a packet for an attachment stream.\n");
763 return AVERROR(EINVAL);
769 static int prepare_input_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt)
771 #if !FF_API_COMPUTE_PKT_FIELDS2
772 /* sanitize the timestamps */
773 if (!(s->oformat->flags & AVFMT_NOTIMESTAMPS)) {
775 /* when there is no reordering (so dts is equal to pts), but
776 * only one of them is set, set the other as well */
777 if (!st->internal->reorder) {
778 if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE)
780 if (pkt->dts == AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE)
784 /* check that the timestamps are set */
785 if (pkt->pts == AV_NOPTS_VALUE || pkt->dts == AV_NOPTS_VALUE) {
786 av_log(s, AV_LOG_ERROR,
787 "Timestamps are unset in a packet for stream %d\n", st->index);
788 return AVERROR(EINVAL);
791 /* check that the dts are increasing (or at least non-decreasing,
792 * if the format allows it */
793 if (st->cur_dts != AV_NOPTS_VALUE &&
794 ((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && st->cur_dts >= pkt->dts) ||
795 st->cur_dts > pkt->dts)) {
796 av_log(s, AV_LOG_ERROR,
797 "Application provided invalid, non monotonically increasing "
798 "dts to muxer in stream %d: %" PRId64 " >= %" PRId64 "\n",
799 st->index, st->cur_dts, pkt->dts);
800 return AVERROR(EINVAL);
803 if (pkt->pts < pkt->dts) {
804 av_log(s, AV_LOG_ERROR, "pts %" PRId64 " < dts %" PRId64 " in stream %d\n",
805 pkt->pts, pkt->dts, st->index);
806 return AVERROR(EINVAL);
811 if (st->internal->is_intra_only)
812 pkt->flags |= AV_PKT_FLAG_KEY;
817 #define CHUNK_START 0x1000
819 int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
820 int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
823 PacketList **next_point, *this_pktl;
824 AVStream *st = s->streams[pkt->stream_index];
825 int chunked = s->max_chunk_size || s->max_chunk_duration;
827 this_pktl = av_malloc(sizeof(PacketList));
829 av_packet_unref(pkt);
830 return AVERROR(ENOMEM);
832 if ((ret = av_packet_make_refcounted(pkt)) < 0) {
834 av_packet_unref(pkt);
838 av_packet_move_ref(&this_pktl->pkt, pkt);
839 pkt = &this_pktl->pkt;
841 if (st->internal->last_in_packet_buffer) {
842 next_point = &(st->internal->last_in_packet_buffer->next);
844 next_point = &s->internal->packet_buffer;
848 uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP);
849 st->internal->interleaver_chunk_size += pkt->size;
850 st->internal->interleaver_chunk_duration += pkt->duration;
851 if ( (s->max_chunk_size && st->internal->interleaver_chunk_size > s->max_chunk_size)
852 || (max && st->internal->interleaver_chunk_duration > max)) {
853 st->internal->interleaver_chunk_size = 0;
854 pkt->flags |= CHUNK_START;
855 if (max && st->internal->interleaver_chunk_duration > max) {
856 int64_t syncoffset = (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)*max/2;
857 int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset;
859 st->internal->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max;
861 st->internal->interleaver_chunk_duration = 0;
865 if (chunked && !(pkt->flags & CHUNK_START))
868 if (compare(s, &s->internal->packet_buffer_end->pkt, pkt)) {
870 && ((chunked && !((*next_point)->pkt.flags&CHUNK_START))
871 || !compare(s, &(*next_point)->pkt, pkt)))
872 next_point = &(*next_point)->next;
876 next_point = &(s->internal->packet_buffer_end->next);
879 av_assert1(!*next_point);
881 s->internal->packet_buffer_end = this_pktl;
884 this_pktl->next = *next_point;
886 st->internal->last_in_packet_buffer = *next_point = this_pktl;
891 static int interleave_compare_dts(AVFormatContext *s, const AVPacket *next,
894 AVStream *st = s->streams[pkt->stream_index];
895 AVStream *st2 = s->streams[next->stream_index];
896 int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts,
898 if (s->audio_preload) {
899 int preload = st ->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
900 int preload2 = st2->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
901 if (preload != preload2) {
903 preload *= s->audio_preload;
904 preload2 *= s->audio_preload;
905 ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - preload;
906 ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - preload2;
908 ts = ((uint64_t)pkt ->dts*st ->time_base.num*AV_TIME_BASE - (uint64_t)preload *st ->time_base.den)*st2->time_base.den
909 - ((uint64_t)next->dts*st2->time_base.num*AV_TIME_BASE - (uint64_t)preload2*st2->time_base.den)*st ->time_base.den;
912 comp = (ts2 > ts) - (ts2 < ts);
917 return pkt->stream_index < next->stream_index;
921 int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
922 AVPacket *pkt, int flush)
925 int stream_count = 0;
926 int noninterleaved_count = 0;
931 if ((ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts)) < 0)
935 for (i = 0; i < s->nb_streams; i++) {
936 if (s->streams[i]->internal->last_in_packet_buffer) {
938 } else if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT &&
939 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP8 &&
940 s->streams[i]->codecpar->codec_id != AV_CODEC_ID_VP9) {
941 ++noninterleaved_count;
945 if (s->internal->nb_interleaved_streams == stream_count)
948 if (s->max_interleave_delta > 0 &&
949 s->internal->packet_buffer &&
951 s->internal->nb_interleaved_streams == stream_count+noninterleaved_count
953 AVPacket *top_pkt = &s->internal->packet_buffer->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,
959 for (i = 0; i < s->nb_streams; i++) {
961 const PacketList *last = s->streams[i]->internal->last_in_packet_buffer;
966 last_dts = av_rescale_q(last->pkt.dts,
967 s->streams[i]->time_base,
969 delta_dts = FFMAX(delta_dts, last_dts - top_dts);
972 if (delta_dts > s->max_interleave_delta) {
973 av_log(s, AV_LOG_DEBUG,
974 "Delay between the first packet and last packet in the "
975 "muxing queue is %"PRId64" > %"PRId64": forcing output\n",
976 delta_dts, s->max_interleave_delta);
981 if (s->internal->packet_buffer &&
983 (s->flags & AVFMT_FLAG_SHORTEST) &&
984 s->internal->shortest_end == AV_NOPTS_VALUE) {
985 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
987 s->internal->shortest_end = av_rescale_q(top_pkt->dts,
988 s->streams[top_pkt->stream_index]->time_base,
992 if (s->internal->shortest_end != AV_NOPTS_VALUE) {
993 while (s->internal->packet_buffer) {
994 AVPacket *top_pkt = &s->internal->packet_buffer->pkt;
996 int64_t top_dts = av_rescale_q(top_pkt->dts,
997 s->streams[top_pkt->stream_index]->time_base,
1000 if (s->internal->shortest_end + 1 >= top_dts)
1003 pktl = s->internal->packet_buffer;
1004 st = s->streams[pktl->pkt.stream_index];
1006 s->internal->packet_buffer = pktl->next;
1007 if (!s->internal->packet_buffer)
1008 s->internal->packet_buffer_end = NULL;
1010 if (st->internal->last_in_packet_buffer == pktl)
1011 st->internal->last_in_packet_buffer = NULL;
1013 av_packet_unref(&pktl->pkt);
1019 if (stream_count && flush) {
1021 pktl = s->internal->packet_buffer;
1023 st = s->streams[out->stream_index];
1025 s->internal->packet_buffer = pktl->next;
1026 if (!s->internal->packet_buffer)
1027 s->internal->packet_buffer_end = NULL;
1029 if (st->internal->last_in_packet_buffer == pktl)
1030 st->internal->last_in_packet_buffer = NULL;
1039 int ff_get_muxer_ts_offset(AVFormatContext *s, int stream_index, int64_t *offset)
1043 if (stream_index < 0 || stream_index >= s->nb_streams)
1044 return AVERROR(EINVAL);
1046 st = s->streams[stream_index];
1047 *offset = st->internal->mux_ts_offset;
1049 if (s->output_ts_offset)
1050 *offset += av_rescale_q(s->output_ts_offset, AV_TIME_BASE_Q, st->time_base);
1055 const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream)
1057 PacketList *pktl = s->internal->packet_buffer;
1059 if (pktl->pkt.stream_index == stream) {
1068 * Interleave an AVPacket correctly so it can be muxed.
1069 * @param out the interleaved packet will be output here
1070 * @param in the input packet; will always be blank on return if not NULL
1071 * @param flush 1 if no further packets are available as input and all
1072 * remaining packets should be output
1073 * @return 1 if a packet was output, 0 if no packet could be output,
1074 * < 0 if an error occurred
1076 static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
1078 if (s->oformat->interleave_packet) {
1079 return s->oformat->interleave_packet(s, out, in, flush);
1081 return ff_interleave_packet_per_dts(s, out, in, flush);
1084 static int check_bitstream(AVFormatContext *s, AVStream *st, AVPacket *pkt)
1088 if (!(s->flags & AVFMT_FLAG_AUTO_BSF))
1091 if (s->oformat->check_bitstream) {
1092 if (!st->internal->bitstream_checked) {
1093 if ((ret = s->oformat->check_bitstream(s, pkt)) < 0)
1096 st->internal->bitstream_checked = 1;
1103 static int interleaved_write_packet(AVFormatContext *s, AVPacket *pkt, int flush)
1107 int ret = interleave_packet(s, &opkt, pkt, flush);
1113 ret = write_packet(s, &opkt);
1115 av_packet_unref(&opkt);
1122 static int write_packet_common(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)
1126 if (s->debug & FF_FDEBUG_TS)
1127 av_log(s, AV_LOG_DEBUG, "%s size:%d dts:%s pts:%s\n", __FUNCTION__,
1128 pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts));
1130 guess_pkt_duration(s, st, pkt);
1132 #if FF_API_COMPUTE_PKT_FIELDS2
1133 if ((ret = compute_muxer_pkt_fields(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1138 if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS))
1139 return AVERROR(EINVAL);
1140 return interleaved_write_packet(s, pkt, 0);
1142 return write_packet(s, pkt);
1146 static int write_packets_from_bsfs(AVFormatContext *s, AVStream *st, AVPacket *pkt, int interleaved)
1148 AVBSFContext *bsfc = st->internal->bsfc;
1151 if ((ret = av_bsf_send_packet(bsfc, pkt)) < 0) {
1152 av_log(s, AV_LOG_ERROR,
1153 "Failed to send packet to filter %s for stream %d\n",
1154 bsfc->filter->name, st->index);
1159 ret = av_bsf_receive_packet(bsfc, pkt);
1161 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
1163 av_log(s, AV_LOG_ERROR, "Error applying bitstream filters to an output "
1164 "packet for stream #%d: %s\n", st->index, av_err2str(ret));
1165 if (!(s->error_recognition & AV_EF_EXPLODE) && ret != AVERROR(ENOMEM))
1169 av_packet_rescale_ts(pkt, bsfc->time_base_out, st->time_base);
1170 ret = write_packet_common(s, st, pkt, interleaved);
1171 if (ret >= 0 && !interleaved) // a successful write_packet_common already unrefed pkt for interleaved
1172 av_packet_unref(pkt);
1178 static int write_packets_common(AVFormatContext *s, AVPacket *pkt, int interleaved)
1181 int ret = check_packet(s, pkt);
1184 st = s->streams[pkt->stream_index];
1186 ret = prepare_input_packet(s, st, pkt);
1190 ret = check_bitstream(s, st, pkt);
1194 if (st->internal->bsfc) {
1195 return write_packets_from_bsfs(s, st, pkt, interleaved);
1197 return write_packet_common(s, st, pkt, interleaved);
1201 int av_write_frame(AVFormatContext *s, AVPacket *in)
1203 AVPacket *pkt = s->internal->pkt;
1207 if (s->oformat->flags & AVFMT_ALLOW_FLUSH) {
1208 ret = s->oformat->write_packet(s, NULL);
1210 if (ret >= 0 && s->pb && s->pb->error < 0)
1217 if (in->flags & AV_PKT_FLAG_UNCODED_FRAME) {
1220 /* We don't own in, so we have to make sure not to modify it.
1221 * The following avoids copying in's data unnecessarily.
1222 * Copying side data is unavoidable as a bitstream filter
1223 * may change it, e.g. free it on errors. */
1224 av_packet_unref(pkt);
1226 pkt->data = in->data;
1227 pkt->size = in->size;
1228 ret = av_packet_copy_props(pkt, in);
1232 pkt->buf = av_buffer_ref(in->buf);
1234 ret = AVERROR(ENOMEM);
1240 ret = write_packets_common(s, pkt, 0/*non-interleaved*/);
1243 // Uncoded frames using the noninterleaved codepath are also freed here
1244 av_packet_unref(pkt);
1248 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
1253 ret = write_packets_common(s, pkt, 1/*interleaved*/);
1255 av_packet_unref(pkt);
1258 av_log(s, AV_LOG_TRACE, "av_interleaved_write_frame FLUSH\n");
1259 return interleaved_write_packet(s, NULL, 1/*flush*/);
1263 int av_write_trailer(AVFormatContext *s)
1265 int i, ret1, ret = 0;
1266 AVPacket *pkt = s->internal->pkt;
1268 av_packet_unref(pkt);
1269 for (i = 0; i < s->nb_streams; i++) {
1270 if (s->streams[i]->internal->bsfc) {
1271 ret1 = write_packets_from_bsfs(s, s->streams[i], pkt, 1/*interleaved*/);
1273 av_packet_unref(pkt);
1278 ret1 = interleaved_write_packet(s, NULL, 1);
1282 if (s->oformat->write_trailer) {
1283 if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
1284 avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_TRAILER);
1286 ret = s->oformat->write_trailer(s);
1288 s->oformat->write_trailer(s);
1297 ret = s->pb ? s->pb->error : 0;
1298 for (i = 0; i < s->nb_streams; i++) {
1299 av_freep(&s->streams[i]->priv_data);
1300 av_freep(&s->streams[i]->internal->index_entries);
1302 if (s->oformat->priv_class)
1303 av_opt_free(s->priv_data);
1304 av_freep(&s->priv_data);
1308 int av_get_output_timestamp(struct AVFormatContext *s, int stream,
1309 int64_t *dts, int64_t *wall)
1311 if (!s->oformat || !s->oformat->get_output_timestamp)
1312 return AVERROR(ENOSYS);
1313 s->oformat->get_output_timestamp(s, stream, dts, wall);
1317 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
1318 AVFormatContext *src, int interleave)
1324 local_pkt.stream_index = dst_stream;
1326 av_packet_rescale_ts(&local_pkt,
1327 src->streams[pkt->stream_index]->time_base,
1328 dst->streams[dst_stream]->time_base);
1330 if (interleave) ret = av_interleaved_write_frame(dst, &local_pkt);
1331 else ret = av_write_frame(dst, &local_pkt);
1332 pkt->buf = local_pkt.buf;
1333 pkt->side_data = local_pkt.side_data;
1334 pkt->side_data_elems = local_pkt.side_data_elems;
1338 static void uncoded_frame_free(void *unused, uint8_t *data)
1340 av_frame_free((AVFrame **)data);
1344 static int write_uncoded_frame_internal(AVFormatContext *s, int stream_index,
1345 AVFrame *frame, int interleaved)
1347 AVPacket *pkt = s->internal->pkt;
1349 av_assert0(s->oformat);
1350 if (!s->oformat->write_uncoded_frame) {
1351 av_frame_free(&frame);
1352 return AVERROR(ENOSYS);
1358 size_t bufsize = sizeof(frame) + AV_INPUT_BUFFER_PADDING_SIZE;
1359 AVFrame **framep = av_mallocz(bufsize);
1363 av_packet_unref(pkt);
1364 pkt->buf = av_buffer_create((void *)framep, bufsize,
1365 uncoded_frame_free, NULL, 0);
1369 av_frame_free(&frame);
1370 return AVERROR(ENOMEM);
1374 pkt->data = (void *)framep;
1375 pkt->size = sizeof(frame);
1377 pkt->dts = frame->pts;
1378 pkt->duration = frame->pkt_duration;
1379 pkt->stream_index = stream_index;
1380 pkt->flags |= AV_PKT_FLAG_UNCODED_FRAME;
1383 return interleaved ? av_interleaved_write_frame(s, pkt) :
1384 av_write_frame(s, pkt);
1387 int av_write_uncoded_frame(AVFormatContext *s, int stream_index,
1390 return write_uncoded_frame_internal(s, stream_index, frame, 0);
1393 int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index,
1396 return write_uncoded_frame_internal(s, stream_index, frame, 1);
1399 int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index)
1401 av_assert0(s->oformat);
1402 if (!s->oformat->write_uncoded_frame)
1403 return AVERROR(ENOSYS);
1404 return s->oformat->write_uncoded_frame(s, stream_index, NULL,
1405 AV_WRITE_UNCODED_FRAME_QUERY);