2 * MPEG2 transport stream (aka DVB) demuxer
3 * Copyright (c) 2002-2003 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
22 #include "libavutil/buffer.h"
23 #include "libavutil/crc.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/log.h"
26 #include "libavutil/dict.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/avassert.h"
30 #include "libavcodec/bytestream.h"
31 #include "libavcodec/get_bits.h"
32 #include "libavcodec/opus.h"
36 #include "avio_internal.h"
40 /* maximum size in which we look for synchronisation if
41 * synchronisation is lost */
42 #define MAX_RESYNC_SIZE 65536
44 #define MAX_PES_PAYLOAD 200 * 1024
46 #define MAX_MP4_DESCR_COUNT 16
48 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
50 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
51 (modulus) = (dividend) % (divisor); \
52 (prev_dividend) = (dividend); \
55 enum MpegTSFilterType {
61 typedef struct MpegTSFilter MpegTSFilter;
63 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
64 int is_start, int64_t pos);
66 typedef struct MpegTSPESFilter {
71 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
73 typedef void SetServiceCallback (void *opaque, int ret);
75 typedef struct MpegTSSectionFilter {
79 unsigned int check_crc : 1;
80 unsigned int end_of_section_reached : 1;
81 SectionCallback *section_cb;
83 } MpegTSSectionFilter;
88 int last_cc; /* last cc code (-1 if first packet) */
90 enum MpegTSFilterType type;
92 MpegTSPESFilter pes_filter;
93 MpegTSSectionFilter section_filter;
97 #define MAX_PIDS_PER_PROGRAM 64
99 unsigned int id; // program id/service id
100 unsigned int nb_pids;
101 unsigned int pids[MAX_PIDS_PER_PROGRAM];
103 /** have we found pmt for this program */
107 struct MpegTSContext {
108 const AVClass *class;
110 AVFormatContext *stream;
111 /** raw packet size, including FEC if present */
116 #define SIZE_STAT_THRESHOLD 10
120 /** if true, all pids are analyzed to find streams */
123 /** compute exact PCR for each transport stream packet */
124 int mpeg2ts_compute_pcr;
126 /** fix dvb teletext pts */
127 int fix_teletext_pts;
129 int64_t cur_pcr; /**< used to estimate the exact PCR */
130 int pcr_incr; /**< used to estimate the exact PCR */
132 /* data needed to handle file based ts */
133 /** stop parsing loop */
135 /** packet containing Audio/Video data */
137 /** to detect seek */
147 /******************************************/
148 /* private mpegts data */
150 /** structure to keep track of Program->pids mapping */
154 int8_t crc_validity[NB_PID_MAX];
155 /** filters for various streams specified by PMT + for the PAT and PMT */
156 MpegTSFilter *pids[NB_PID_MAX];
160 #define MPEGTS_OPTIONS \
161 { "resync_size", "Size limit for looking up a new synchronization.", offsetof(MpegTSContext, resync_size), AV_OPT_TYPE_INT, { .i64 = MAX_RESYNC_SIZE}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }
163 static const AVOption options[] = {
165 {"fix_teletext_pts", "Try to fix pts values of dvb teletext streams.", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_INT,
166 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
167 {"ts_packetsize", "Output option carrying the raw packet size.", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
168 {.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
169 {"scan_all_pmts", "Scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_INT,
170 { .i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
171 {"skip_changes", "Skip changing / adding streams / programs.", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_INT,
172 {.i64 = 0}, 0, 1, 0 },
173 {"skip_clear", "Skip clearing programs.", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_INT,
174 {.i64 = 0}, 0, 1, 0 },
178 static const AVClass mpegts_class = {
179 .class_name = "mpegts demuxer",
180 .item_name = av_default_item_name,
182 .version = LIBAVUTIL_VERSION_INT,
185 static const AVOption raw_options[] = {
187 { "compute_pcr", "Compute exact PCR for each transport stream packet.",
188 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT,
189 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
190 { "ts_packetsize", "Output option carrying the raw packet size.",
191 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
193 AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
197 static const AVClass mpegtsraw_class = {
198 .class_name = "mpegtsraw demuxer",
199 .item_name = av_default_item_name,
200 .option = raw_options,
201 .version = LIBAVUTIL_VERSION_INT,
204 /* TS stream handling */
209 MPEGTS_PESHEADER_FILL,
214 /* enough for PES header + length */
215 #define PES_START_SIZE 6
216 #define PES_HEADER_SIZE 9
217 #define MAX_PES_HEADER_SIZE (9 + 255)
219 typedef struct PESContext {
221 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
224 AVFormatContext *stream;
226 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
227 enum MpegTSState state;
228 /* used to get the format */
230 int flags; /**< copied to the AVPacket flags */
233 int extended_stream_id;
235 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
236 uint8_t header[MAX_PES_HEADER_SIZE];
241 extern AVInputFormat ff_mpegts_demuxer;
243 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
246 for (i = 0; i < ts->nb_prg; i++) {
247 if (ts->prg[i].id == programid) {
254 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
256 AVProgram *prg = NULL;
259 for (i = 0; i < ts->stream->nb_programs; i++)
260 if (ts->stream->programs[i]->id == programid) {
261 prg = ts->stream->programs[i];
266 prg->nb_stream_indexes = 0;
269 static void clear_program(MpegTSContext *ts, unsigned int programid)
273 clear_avprogram(ts, programid);
274 for (i = 0; i < ts->nb_prg; i++)
275 if (ts->prg[i].id == programid) {
276 ts->prg[i].nb_pids = 0;
277 ts->prg[i].pmt_found = 0;
281 static void clear_programs(MpegTSContext *ts)
287 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
290 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
294 p = &ts->prg[ts->nb_prg];
301 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
304 struct Program *p = get_program(ts, programid);
309 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
312 for (i = 0; i < p->nb_pids; i++)
313 if (p->pids[i] == pid)
316 p->pids[p->nb_pids++] = pid;
319 static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
321 struct Program *p = get_program(ts, programid);
328 static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
331 for (i = 0; i < s->nb_programs; i++) {
332 if (s->programs[i]->id == programid) {
333 s->programs[i]->pcr_pid = pid;
340 * @brief discard_pid() decides if the pid is to be discarded according
341 * to caller's programs selection
342 * @param ts : - TS context
344 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
347 static int discard_pid(MpegTSContext *ts, unsigned int pid)
350 int used = 0, discarded = 0;
353 /* If none of the programs have .discard=AVDISCARD_ALL then there's
354 * no way we have to discard this packet */
355 for (k = 0; k < ts->stream->nb_programs; k++)
356 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
358 if (k == ts->stream->nb_programs)
361 for (i = 0; i < ts->nb_prg; i++) {
363 for (j = 0; j < p->nb_pids; j++) {
364 if (p->pids[j] != pid)
366 // is program with id p->id set to be discarded?
367 for (k = 0; k < ts->stream->nb_programs; k++) {
368 if (ts->stream->programs[k]->id == p->id) {
369 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
378 return !used && discarded;
382 * Assemble PES packets out of TS packets, and then call the "section_cb"
383 * function when they are complete.
385 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
386 const uint8_t *buf, int buf_size, int is_start)
388 MpegTSSectionFilter *tss = &tss1->u.section_filter;
392 memcpy(tss->section_buf, buf, buf_size);
393 tss->section_index = buf_size;
394 tss->section_h_size = -1;
395 tss->end_of_section_reached = 0;
397 if (tss->end_of_section_reached)
399 len = 4096 - tss->section_index;
402 memcpy(tss->section_buf + tss->section_index, buf, len);
403 tss->section_index += len;
406 /* compute section length if possible */
407 if (tss->section_h_size == -1 && tss->section_index >= 3) {
408 len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
411 tss->section_h_size = len;
414 if (tss->section_h_size != -1 &&
415 tss->section_index >= tss->section_h_size) {
417 tss->end_of_section_reached = 1;
419 if (tss->check_crc) {
420 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, tss->section_buf, tss->section_h_size);
422 ts->crc_validity[ tss1->pid ] = 100;
423 }else if (ts->crc_validity[ tss1->pid ] > -10) {
424 ts->crc_validity[ tss1->pid ]--;
429 tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
433 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
434 enum MpegTSFilterType type)
436 MpegTSFilter *filter;
438 av_dlog(ts->stream, "Filter: pid=0x%x\n", pid);
440 if (pid >= NB_PID_MAX || ts->pids[pid])
442 filter = av_mallocz(sizeof(MpegTSFilter));
445 ts->pids[pid] = filter;
450 filter->last_cc = -1;
451 filter->last_pcr= -1;
456 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
458 SectionCallback *section_cb,
462 MpegTSFilter *filter;
463 MpegTSSectionFilter *sec;
465 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
467 sec = &filter->u.section_filter;
468 sec->section_cb = section_cb;
469 sec->opaque = opaque;
470 sec->section_buf = av_malloc(MAX_SECTION_SIZE);
471 sec->check_crc = check_crc;
472 if (!sec->section_buf) {
479 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
483 MpegTSFilter *filter;
484 MpegTSPESFilter *pes;
486 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
489 pes = &filter->u.pes_filter;
490 pes->pes_cb = pes_cb;
491 pes->opaque = opaque;
495 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
497 return mpegts_open_filter(ts, pid, MPEGTS_PCR);
500 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
505 if (filter->type == MPEGTS_SECTION)
506 av_freep(&filter->u.section_filter.section_buf);
507 else if (filter->type == MPEGTS_PES) {
508 PESContext *pes = filter->u.pes_filter.opaque;
509 av_buffer_unref(&pes->buffer);
510 /* referenced private data will be freed later in
511 * avformat_close_input */
512 if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
513 av_freep(&filter->u.pes_filter.opaque);
518 ts->pids[pid] = NULL;
521 static int analyze(const uint8_t *buf, int size, int packet_size, int *index,
524 int stat[TS_MAX_PACKET_SIZE];
529 memset(stat, 0, packet_size * sizeof(*stat));
531 for (i = 0; i < size - 3; i++) {
532 if (buf[i] == 0x47 &&
533 (!probe || (!(buf[i + 1] & 0x80) && buf[i + 3] != 0x47))) {
534 int x = i % packet_size;
537 if (stat[x] > best_score) {
538 best_score = stat[x];
545 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
548 /* autodetect fec presence. Must have at least 1024 bytes */
549 static int get_packet_size(const uint8_t *buf, int size)
551 int score, fec_score, dvhs_score;
553 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
554 return AVERROR_INVALIDDATA;
556 score = analyze(buf, size, TS_PACKET_SIZE, NULL, 0);
557 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL, 0);
558 fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, NULL, 0);
559 av_dlog(NULL, "score: %d, dvhs_score: %d, fec_score: %d \n",
560 score, dvhs_score, fec_score);
562 if (score > fec_score && score > dvhs_score)
563 return TS_PACKET_SIZE;
564 else if (dvhs_score > score && dvhs_score > fec_score)
565 return TS_DVHS_PACKET_SIZE;
566 else if (score < fec_score && dvhs_score < fec_score)
567 return TS_FEC_PACKET_SIZE;
569 return AVERROR_INVALIDDATA;
572 typedef struct SectionHeader {
577 uint8_t last_sec_num;
580 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
587 return AVERROR_INVALIDDATA;
593 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
600 return AVERROR_INVALIDDATA;
607 /* read and allocate a DVB string preceded by its length */
608 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
615 len = get8(&p, p_end);
620 str = av_malloc(len + 1);
630 static int parse_section_header(SectionHeader *h,
631 const uint8_t **pp, const uint8_t *p_end)
635 val = get8(pp, p_end);
640 val = get16(pp, p_end);
644 val = get8(pp, p_end);
647 h->version = (val >> 1) & 0x1f;
648 val = get8(pp, p_end);
652 val = get8(pp, p_end);
655 h->last_sec_num = val;
659 typedef struct StreamType {
660 uint32_t stream_type;
661 enum AVMediaType codec_type;
662 enum AVCodecID codec_id;
665 static const StreamType ISO_types[] = {
666 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
667 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
668 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
669 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
670 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
671 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
672 /* Makito encoder sets stream type 0x11 for AAC,
673 * so auto-detect LOAS/LATM instead of hardcoding it. */
674 #if !CONFIG_LOAS_DEMUXER
675 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
677 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
678 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
679 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
680 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
681 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
682 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
686 static const StreamType HDMV_types[] = {
687 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
688 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
689 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
690 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
691 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
692 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
693 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
694 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
695 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
696 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
701 static const StreamType MISC_types[] = {
702 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
703 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
707 static const StreamType REGD_types[] = {
708 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
709 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
710 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
711 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
712 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
713 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
714 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
715 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
716 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
717 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
721 static const StreamType METADATA_types[] = {
722 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
723 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
727 /* descriptor present */
728 static const StreamType DESC_types[] = {
729 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
730 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
731 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
732 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
733 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
737 static void mpegts_find_stream_type(AVStream *st,
738 uint32_t stream_type,
739 const StreamType *types)
741 if (avcodec_is_open(st->codec)) {
742 av_log(NULL, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
746 for (; types->stream_type; types++)
747 if (stream_type == types->stream_type) {
748 st->codec->codec_type = types->codec_type;
749 st->codec->codec_id = types->codec_id;
750 st->request_probe = 0;
755 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
756 uint32_t stream_type, uint32_t prog_reg_desc)
758 int old_codec_type = st->codec->codec_type;
759 int old_codec_id = st->codec->codec_id;
761 if (avcodec_is_open(st->codec)) {
762 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
766 avpriv_set_pts_info(st, 33, 1, 90000);
768 st->codec->codec_type = AVMEDIA_TYPE_DATA;
769 st->codec->codec_id = AV_CODEC_ID_NONE;
770 st->need_parsing = AVSTREAM_PARSE_FULL;
772 pes->stream_type = stream_type;
774 av_log(pes->stream, AV_LOG_DEBUG,
775 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
776 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
778 st->codec->codec_tag = pes->stream_type;
780 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
781 if ((prog_reg_desc == AV_RL32("HDMV") ||
782 prog_reg_desc == AV_RL32("HDPR")) &&
783 st->codec->codec_id == AV_CODEC_ID_NONE) {
784 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
785 if (pes->stream_type == 0x83) {
786 // HDMV TrueHD streams also contain an AC3 coded version of the
787 // audio track - add a second stream for this
789 // priv_data cannot be shared between streams
790 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
792 return AVERROR(ENOMEM);
793 memcpy(sub_pes, pes, sizeof(*sub_pes));
795 sub_st = avformat_new_stream(pes->stream, NULL);
798 return AVERROR(ENOMEM);
801 sub_st->id = pes->pid;
802 avpriv_set_pts_info(sub_st, 33, 1, 90000);
803 sub_st->priv_data = sub_pes;
804 sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
805 sub_st->codec->codec_id = AV_CODEC_ID_AC3;
806 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
807 sub_pes->sub_st = pes->sub_st = sub_st;
810 if (st->codec->codec_id == AV_CODEC_ID_NONE)
811 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
812 if (st->codec->codec_id == AV_CODEC_ID_NONE) {
813 st->codec->codec_id = old_codec_id;
814 st->codec->codec_type = old_codec_type;
820 static void reset_pes_packet_state(PESContext *pes)
822 pes->pts = AV_NOPTS_VALUE;
823 pes->dts = AV_NOPTS_VALUE;
826 av_buffer_unref(&pes->buffer);
829 static void new_pes_packet(PESContext *pes, AVPacket *pkt)
833 pkt->buf = pes->buffer;
834 pkt->data = pes->buffer->data;
835 pkt->size = pes->data_index;
837 if (pes->total_size != MAX_PES_PAYLOAD &&
838 pes->pes_header_size + pes->data_index != pes->total_size +
840 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
841 pes->flags |= AV_PKT_FLAG_CORRUPT;
843 memset(pkt->data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
845 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
846 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
847 pkt->stream_index = pes->sub_st->index;
849 pkt->stream_index = pes->st->index;
852 /* store position of first TS packet of this PES packet */
853 pkt->pos = pes->ts_packet_pos;
854 pkt->flags = pes->flags;
857 reset_pes_packet_state(pes);
860 static uint64_t get_ts64(GetBitContext *gb, int bits)
862 if (get_bits_left(gb) < bits)
863 return AV_NOPTS_VALUE;
864 return get_bits64(gb, bits);
867 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
868 const uint8_t *buf, int buf_size)
871 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
872 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
873 int dts_flag = -1, cts_flag = -1;
874 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
875 uint8_t buf_padded[128 + FF_INPUT_BUFFER_PADDING_SIZE];
876 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - FF_INPUT_BUFFER_PADDING_SIZE);
878 memcpy(buf_padded, buf, buf_padded_size);
880 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
882 if (sl->use_au_start)
883 au_start_flag = get_bits1(&gb);
885 au_end_flag = get_bits1(&gb);
886 if (!sl->use_au_start && !sl->use_au_end)
887 au_start_flag = au_end_flag = 1;
889 ocr_flag = get_bits1(&gb);
891 idle_flag = get_bits1(&gb);
893 padding_flag = get_bits1(&gb);
895 padding_bits = get_bits(&gb, 3);
897 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
898 if (sl->packet_seq_num_len)
899 skip_bits_long(&gb, sl->packet_seq_num_len);
900 if (sl->degr_prior_len)
902 skip_bits(&gb, sl->degr_prior_len);
904 skip_bits_long(&gb, sl->ocr_len);
906 if (sl->use_rand_acc_pt)
908 if (sl->au_seq_num_len > 0)
909 skip_bits_long(&gb, sl->au_seq_num_len);
910 if (sl->use_timestamps) {
911 dts_flag = get_bits1(&gb);
912 cts_flag = get_bits1(&gb);
915 if (sl->inst_bitrate_len)
916 inst_bitrate_flag = get_bits1(&gb);
918 dts = get_ts64(&gb, sl->timestamp_len);
920 cts = get_ts64(&gb, sl->timestamp_len);
922 skip_bits_long(&gb, sl->au_len);
923 if (inst_bitrate_flag)
924 skip_bits_long(&gb, sl->inst_bitrate_len);
927 if (dts != AV_NOPTS_VALUE)
929 if (cts != AV_NOPTS_VALUE)
932 if (sl->timestamp_len && sl->timestamp_res)
933 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
935 return (get_bits_count(&gb) + 7) >> 3;
938 /* return non zero if a packet could be constructed */
939 static int mpegts_push_data(MpegTSFilter *filter,
940 const uint8_t *buf, int buf_size, int is_start,
943 PESContext *pes = filter->u.pes_filter.opaque;
944 MpegTSContext *ts = pes->ts;
952 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
953 new_pes_packet(pes, ts->pkt);
956 reset_pes_packet_state(pes);
958 pes->state = MPEGTS_HEADER;
959 pes->ts_packet_pos = pos;
962 while (buf_size > 0) {
963 switch (pes->state) {
965 len = PES_START_SIZE - pes->data_index;
968 memcpy(pes->header + pes->data_index, p, len);
969 pes->data_index += len;
972 if (pes->data_index == PES_START_SIZE) {
973 /* we got all the PES or section header. We can now
975 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
976 pes->header[2] == 0x01) {
977 /* it must be an mpeg2 PES stream */
978 code = pes->header[3] | 0x100;
979 av_dlog(pes->stream, "pid=%x pes_code=%#x\n", pes->pid,
982 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
984 pes->sub_st->discard == AVDISCARD_ALL)) ||
985 code == 0x1be) /* padding_stream */
988 /* stream not present in PMT */
990 if (ts->skip_changes)
993 pes->st = avformat_new_stream(ts->stream, NULL);
995 return AVERROR(ENOMEM);
996 pes->st->id = pes->pid;
997 mpegts_set_stream_info(pes->st, pes, 0, 0);
1000 pes->total_size = AV_RB16(pes->header + 4);
1001 /* NOTE: a zero total size means the PES size is
1003 if (!pes->total_size)
1004 pes->total_size = MAX_PES_PAYLOAD;
1006 /* allocate pes buffer */
1007 pes->buffer = av_buffer_alloc(pes->total_size +
1008 FF_INPUT_BUFFER_PADDING_SIZE);
1010 return AVERROR(ENOMEM);
1012 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1013 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1014 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1015 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1016 pes->state = MPEGTS_PESHEADER;
1017 if (pes->st->codec->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1018 av_dlog(pes->stream,
1019 "pid=%x stream_type=%x probing\n",
1022 pes->st->request_probe = 1;
1025 pes->state = MPEGTS_PAYLOAD;
1026 pes->data_index = 0;
1029 /* otherwise, it should be a table */
1032 pes->state = MPEGTS_SKIP;
1037 /**********************************************/
1038 /* PES packing parsing */
1039 case MPEGTS_PESHEADER:
1040 len = PES_HEADER_SIZE - pes->data_index;
1042 return AVERROR_INVALIDDATA;
1045 memcpy(pes->header + pes->data_index, p, len);
1046 pes->data_index += len;
1049 if (pes->data_index == PES_HEADER_SIZE) {
1050 pes->pes_header_size = pes->header[8] + 9;
1051 pes->state = MPEGTS_PESHEADER_FILL;
1054 case MPEGTS_PESHEADER_FILL:
1055 len = pes->pes_header_size - pes->data_index;
1057 return AVERROR_INVALIDDATA;
1060 memcpy(pes->header + pes->data_index, p, len);
1061 pes->data_index += len;
1064 if (pes->data_index == pes->pes_header_size) {
1066 unsigned int flags, pes_ext, skip;
1068 flags = pes->header[7];
1069 r = pes->header + 9;
1070 pes->pts = AV_NOPTS_VALUE;
1071 pes->dts = AV_NOPTS_VALUE;
1072 if ((flags & 0xc0) == 0x80) {
1073 pes->dts = pes->pts = ff_parse_pes_pts(r);
1075 } else if ((flags & 0xc0) == 0xc0) {
1076 pes->pts = ff_parse_pes_pts(r);
1078 pes->dts = ff_parse_pes_pts(r);
1081 pes->extended_stream_id = -1;
1082 if (flags & 0x01) { /* PES extension */
1084 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1085 skip = (pes_ext >> 4) & 0xb;
1088 if ((pes_ext & 0x41) == 0x01 &&
1089 (r + 2) <= (pes->header + pes->pes_header_size)) {
1090 /* PES extension 2 */
1091 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1092 pes->extended_stream_id = r[1];
1096 /* we got the full header. We parse it and get the payload */
1097 pes->state = MPEGTS_PAYLOAD;
1098 pes->data_index = 0;
1099 if (pes->stream_type == 0x12 && buf_size > 0) {
1100 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1102 pes->pes_header_size += sl_header_bytes;
1103 p += sl_header_bytes;
1104 buf_size -= sl_header_bytes;
1106 if (pes->stream_type == 0x15 && buf_size >= 5) {
1107 /* skip metadata access unit header */
1108 pes->pes_header_size += 5;
1112 if (pes->ts->fix_teletext_pts && pes->st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1113 AVProgram *p = NULL;
1114 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1115 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1116 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1118 AVStream *st = NULL;
1119 if (f->type == MPEGTS_PES) {
1120 PESContext *pcrpes = f->u.pes_filter.opaque;
1123 } else if (f->type == MPEGTS_PCR) {
1125 for (i = 0; i < p->nb_stream_indexes; i++) {
1126 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1127 if (pst->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1131 if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1132 // teletext packets do not always have correct timestamps,
1133 // the standard says they should be handled after 40.6 ms at most,
1134 // and the pcr error to this packet should be no more than 100 ms.
1135 // TODO: we should interpolate the PCR, not just use the last one
1136 int64_t pcr = f->last_pcr / 300;
1137 pes->st->pts_wrap_reference = st->pts_wrap_reference;
1138 pes->st->pts_wrap_behavior = st->pts_wrap_behavior;
1139 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1140 pes->pts = pes->dts = pcr;
1141 } else if (pes->dts > pcr + 3654 + 9000) {
1142 pes->pts = pes->dts = pcr + 3654 + 9000;
1152 case MPEGTS_PAYLOAD:
1154 if (pes->data_index > 0 &&
1155 pes->data_index + buf_size > pes->total_size) {
1156 new_pes_packet(pes, ts->pkt);
1157 pes->total_size = MAX_PES_PAYLOAD;
1158 pes->buffer = av_buffer_alloc(pes->total_size +
1159 FF_INPUT_BUFFER_PADDING_SIZE);
1161 return AVERROR(ENOMEM);
1163 } else if (pes->data_index == 0 &&
1164 buf_size > pes->total_size) {
1165 // pes packet size is < ts size packet and pes data is padded with 0xff
1166 // not sure if this is legal in ts but see issue #2392
1167 buf_size = pes->total_size;
1169 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1170 pes->data_index += buf_size;
1171 /* emit complete packets with known packet size
1172 * decreases demuxer delay for infrequent packets like subtitles from
1173 * a couple of seconds to milliseconds for properly muxed files.
1174 * total_size is the number of bytes following pes_packet_length
1175 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1176 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1177 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1179 new_pes_packet(pes, ts->pkt);
1193 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1198 /* if no pid found, then add a pid context */
1199 pes = av_mallocz(sizeof(PESContext));
1203 pes->stream = ts->stream;
1205 pes->pcr_pid = pcr_pid;
1206 pes->state = MPEGTS_SKIP;
1207 pes->pts = AV_NOPTS_VALUE;
1208 pes->dts = AV_NOPTS_VALUE;
1209 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1218 typedef struct MP4DescrParseContext {
1222 Mp4Descr *active_descr;
1224 int max_descr_count;
1226 int predefined_SLConfigDescriptor_seen;
1227 } MP4DescrParseContext;
1229 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1230 const uint8_t *buf, unsigned size,
1231 Mp4Descr *descr, int max_descr_count)
1234 if (size > (1 << 30))
1235 return AVERROR_INVALIDDATA;
1237 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1238 NULL, NULL, NULL, NULL)) < 0)
1245 d->active_descr = NULL;
1246 d->max_descr_count = max_descr_count;
1251 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1253 int64_t new_off = avio_tell(pb);
1254 (*len) -= new_off - *off;
1258 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1261 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1264 int ret = parse_mp4_descr(d, off, len, 0);
1267 update_offsets(&d->pb, &off, &len);
1272 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1274 avio_rb16(&d->pb); // ID
1280 update_offsets(&d->pb, &off, &len);
1281 return parse_mp4_descr_arr(d, off, len);
1284 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1289 id_flags = avio_rb16(&d->pb);
1290 if (!(id_flags & 0x0020)) { // URL_Flag
1291 update_offsets(&d->pb, &off, &len);
1292 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1298 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1301 if (d->descr_count >= d->max_descr_count)
1302 return AVERROR_INVALIDDATA;
1303 ff_mp4_parse_es_descr(&d->pb, &es_id);
1304 d->active_descr = d->descr + (d->descr_count++);
1306 d->active_descr->es_id = es_id;
1307 update_offsets(&d->pb, &off, &len);
1308 parse_mp4_descr(d, off, len, MP4DecConfigDescrTag);
1309 update_offsets(&d->pb, &off, &len);
1311 parse_mp4_descr(d, off, len, MP4SLDescrTag);
1312 d->active_descr = NULL;
1316 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1319 Mp4Descr *descr = d->active_descr;
1321 return AVERROR_INVALIDDATA;
1322 d->active_descr->dec_config_descr = av_malloc(len);
1323 if (!descr->dec_config_descr)
1324 return AVERROR(ENOMEM);
1325 descr->dec_config_descr_len = len;
1326 avio_read(&d->pb, descr->dec_config_descr, len);
1330 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1332 Mp4Descr *descr = d->active_descr;
1335 return AVERROR_INVALIDDATA;
1337 predefined = avio_r8(&d->pb);
1340 int flags = avio_r8(&d->pb);
1341 descr->sl.use_au_start = !!(flags & 0x80);
1342 descr->sl.use_au_end = !!(flags & 0x40);
1343 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1344 descr->sl.use_padding = !!(flags & 0x08);
1345 descr->sl.use_timestamps = !!(flags & 0x04);
1346 descr->sl.use_idle = !!(flags & 0x02);
1347 descr->sl.timestamp_res = avio_rb32(&d->pb);
1349 descr->sl.timestamp_len = avio_r8(&d->pb);
1350 if (descr->sl.timestamp_len > 64) {
1351 avpriv_request_sample(NULL, "timestamp_len > 64");
1352 descr->sl.timestamp_len = 64;
1353 return AVERROR_PATCHWELCOME;
1355 descr->sl.ocr_len = avio_r8(&d->pb);
1356 descr->sl.au_len = avio_r8(&d->pb);
1357 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1358 lengths = avio_rb16(&d->pb);
1359 descr->sl.degr_prior_len = lengths >> 12;
1360 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1361 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1362 } else if (!d->predefined_SLConfigDescriptor_seen){
1363 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1364 d->predefined_SLConfigDescriptor_seen = 1;
1369 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1373 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1374 update_offsets(&d->pb, &off, &len);
1375 if (len < 0 || len1 > len || len1 <= 0) {
1376 av_log(d->s, AV_LOG_ERROR,
1377 "Tag %x length violation new length %d bytes remaining %d\n",
1379 return AVERROR_INVALIDDATA;
1382 if (d->level++ >= MAX_LEVEL) {
1383 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1387 if (target_tag && tag != target_tag) {
1388 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1395 parse_MP4IODescrTag(d, off, len1);
1398 parse_MP4ODescrTag(d, off, len1);
1401 parse_MP4ESDescrTag(d, off, len1);
1403 case MP4DecConfigDescrTag:
1404 parse_MP4DecConfigDescrTag(d, off, len1);
1407 parse_MP4SLDescrTag(d, off, len1);
1414 avio_seek(&d->pb, off + len1, SEEK_SET);
1418 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1419 Mp4Descr *descr, int *descr_count, int max_descr_count)
1421 MP4DescrParseContext d;
1424 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1428 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1430 *descr_count = d.descr_count;
1434 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1435 Mp4Descr *descr, int *descr_count, int max_descr_count)
1437 MP4DescrParseContext d;
1440 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1444 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1446 *descr_count = d.descr_count;
1450 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1453 MpegTSContext *ts = filter->u.section_filter.opaque;
1455 const uint8_t *p, *p_end;
1457 int mp4_descr_count = 0;
1458 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1460 AVFormatContext *s = ts->stream;
1462 p_end = section + section_len - 4;
1464 if (parse_section_header(&h, &p, p_end) < 0)
1466 if (h.tid != M4OD_TID)
1469 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1470 MAX_MP4_DESCR_COUNT);
1472 for (pid = 0; pid < NB_PID_MAX; pid++) {
1475 for (i = 0; i < mp4_descr_count; i++) {
1478 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1480 if (ts->pids[pid]->type != MPEGTS_PES) {
1481 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1484 pes = ts->pids[pid]->u.pes_filter.opaque;
1489 pes->sl = mp4_descr[i].sl;
1491 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1492 mp4_descr[i].dec_config_descr_len, 0,
1493 NULL, NULL, NULL, NULL);
1494 ff_mp4_read_dec_config_descr(s, st, &pb);
1495 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1496 st->codec->extradata_size > 0)
1497 st->need_parsing = 0;
1498 if (st->codec->codec_id == AV_CODEC_ID_H264 &&
1499 st->codec->extradata_size > 0)
1500 st->need_parsing = 0;
1502 if (st->codec->codec_id <= AV_CODEC_ID_NONE) {
1504 } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_AUDIO)
1505 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1506 else if (st->codec->codec_id < AV_CODEC_ID_FIRST_SUBTITLE)
1507 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1508 else if (st->codec->codec_id < AV_CODEC_ID_FIRST_UNKNOWN)
1509 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1512 for (i = 0; i < mp4_descr_count; i++)
1513 av_free(mp4_descr[i].dec_config_descr);
1516 static const uint8_t opus_coupled_stream_cnt[9] = {
1517 1, 0, 1, 1, 2, 2, 2, 3, 3
1520 static const uint8_t opus_stream_cnt[9] = {
1521 1, 1, 1, 2, 2, 3, 4, 4, 5,
1524 static const uint8_t opus_channel_map[8][8] = {
1532 { 0,6,1,2,3,4,5,7 },
1535 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1536 const uint8_t **pp, const uint8_t *desc_list_end,
1537 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1540 const uint8_t *desc_end;
1541 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1545 desc_tag = get8(pp, desc_list_end);
1547 return AVERROR_INVALIDDATA;
1548 desc_len = get8(pp, desc_list_end);
1550 return AVERROR_INVALIDDATA;
1551 desc_end = *pp + desc_len;
1552 if (desc_end > desc_list_end)
1553 return AVERROR_INVALIDDATA;
1555 av_dlog(fc, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1557 if ((st->codec->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1558 stream_type == STREAM_TYPE_PRIVATE_DATA)
1559 mpegts_find_stream_type(st, desc_tag, DESC_types);
1562 case 0x1E: /* SL descriptor */
1563 desc_es_id = get16(pp, desc_end);
1566 if (ts && ts->pids[pid])
1567 ts->pids[pid]->es_id = desc_es_id;
1568 for (i = 0; i < mp4_descr_count; i++)
1569 if (mp4_descr[i].dec_config_descr_len &&
1570 mp4_descr[i].es_id == desc_es_id) {
1572 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1573 mp4_descr[i].dec_config_descr_len, 0,
1574 NULL, NULL, NULL, NULL);
1575 ff_mp4_read_dec_config_descr(fc, st, &pb);
1576 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1577 st->codec->extradata_size > 0)
1578 st->need_parsing = 0;
1579 if (st->codec->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1580 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1583 case 0x1F: /* FMC descriptor */
1584 if (get16(pp, desc_end) < 0)
1586 if (mp4_descr_count > 0 &&
1587 (st->codec->codec_id == AV_CODEC_ID_AAC_LATM || st->request_probe > 0) &&
1588 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1590 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1591 mp4_descr->dec_config_descr_len, 0,
1592 NULL, NULL, NULL, NULL);
1593 ff_mp4_read_dec_config_descr(fc, st, &pb);
1594 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1595 st->codec->extradata_size > 0) {
1596 st->request_probe = st->need_parsing = 0;
1597 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1601 case 0x56: /* DVB teletext descriptor */
1603 uint8_t *extradata = NULL;
1604 int language_count = desc_len / 5;
1606 if (desc_len > 0 && desc_len % 5 != 0)
1607 return AVERROR_INVALIDDATA;
1609 if (language_count > 0) {
1610 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1611 if (language_count > sizeof(language) / 4) {
1612 language_count = sizeof(language) / 4;
1615 if (st->codec->extradata == NULL) {
1616 if (ff_alloc_extradata(st->codec, language_count * 2)) {
1617 return AVERROR(ENOMEM);
1621 if (st->codec->extradata_size < language_count * 2)
1622 return AVERROR_INVALIDDATA;
1624 extradata = st->codec->extradata;
1626 for (i = 0; i < language_count; i++) {
1627 language[i * 4 + 0] = get8(pp, desc_end);
1628 language[i * 4 + 1] = get8(pp, desc_end);
1629 language[i * 4 + 2] = get8(pp, desc_end);
1630 language[i * 4 + 3] = ',';
1632 memcpy(extradata, *pp, 2);
1638 language[i * 4 - 1] = 0;
1639 av_dict_set(&st->metadata, "language", language, 0);
1643 case 0x59: /* subtitling descriptor */
1645 /* 8 bytes per DVB subtitle substream data:
1646 * ISO_639_language_code (3 bytes),
1647 * subtitling_type (1 byte),
1648 * composition_page_id (2 bytes),
1649 * ancillary_page_id (2 bytes) */
1650 int language_count = desc_len / 8;
1652 if (desc_len > 0 && desc_len % 8 != 0)
1653 return AVERROR_INVALIDDATA;
1655 if (language_count > 1) {
1656 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1659 if (language_count > 0) {
1662 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1663 if (language_count > sizeof(language) / 4) {
1664 language_count = sizeof(language) / 4;
1667 if (st->codec->extradata == NULL) {
1668 if (ff_alloc_extradata(st->codec, language_count * 5)) {
1669 return AVERROR(ENOMEM);
1673 if (st->codec->extradata_size < language_count * 5)
1674 return AVERROR_INVALIDDATA;
1676 extradata = st->codec->extradata;
1678 for (i = 0; i < language_count; i++) {
1679 language[i * 4 + 0] = get8(pp, desc_end);
1680 language[i * 4 + 1] = get8(pp, desc_end);
1681 language[i * 4 + 2] = get8(pp, desc_end);
1682 language[i * 4 + 3] = ',';
1684 /* hearing impaired subtitles detection using subtitling_type */
1686 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1687 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1688 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1689 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1690 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1691 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1692 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1696 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1697 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1703 language[i * 4 - 1] = 0;
1704 av_dict_set(&st->metadata, "language", language, 0);
1708 case 0x0a: /* ISO 639 language descriptor */
1709 for (i = 0; i + 4 <= desc_len; i += 4) {
1710 language[i + 0] = get8(pp, desc_end);
1711 language[i + 1] = get8(pp, desc_end);
1712 language[i + 2] = get8(pp, desc_end);
1713 language[i + 3] = ',';
1714 switch (get8(pp, desc_end)) {
1716 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1719 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1722 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1726 if (i && language[0]) {
1727 language[i - 1] = 0;
1728 av_dict_set(&st->metadata, "language", language, 0);
1731 case 0x05: /* registration descriptor */
1732 st->codec->codec_tag = bytestream_get_le32(pp);
1733 av_dlog(fc, "reg_desc=%.4s\n", (char *)&st->codec->codec_tag);
1734 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1735 mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
1737 case 0x52: /* stream identifier descriptor */
1738 st->stream_identifier = 1 + get8(pp, desc_end);
1740 case 0x26: /* metadata descriptor */
1741 if (get16(pp, desc_end) == 0xFFFF)
1743 if (get8(pp, desc_end) == 0xFF) {
1744 st->codec->codec_tag = bytestream_get_le32(pp);
1745 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1746 mpegts_find_stream_type(st, st->codec->codec_tag, METADATA_types);
1749 case 0x7f: /* DVB extension descriptor */
1750 ext_desc_tag = get8(pp, desc_end);
1751 if (ext_desc_tag < 0)
1752 return AVERROR_INVALIDDATA;
1753 if (st->codec->codec_id == AV_CODEC_ID_OPUS &&
1754 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1755 if (!st->codec->extradata) {
1756 st->codec->extradata = av_mallocz(sizeof(opus_default_extradata) +
1757 FF_INPUT_BUFFER_PADDING_SIZE);
1758 if (!st->codec->extradata)
1759 return AVERROR(ENOMEM);
1761 st->codec->extradata_size = sizeof(opus_default_extradata);
1762 memcpy(st->codec->extradata, opus_default_extradata, sizeof(opus_default_extradata));
1764 channel_config_code = get8(pp, desc_end);
1765 if (channel_config_code < 0)
1766 return AVERROR_INVALIDDATA;
1767 if (channel_config_code <= 0x8) {
1768 st->codec->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1769 st->codec->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
1770 st->codec->extradata[19] = opus_stream_cnt[channel_config_code];
1771 st->codec->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1772 memcpy(&st->codec->extradata[21], opus_channel_map[channels - 1], channels);
1774 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1776 st->need_parsing = AVSTREAM_PARSE_FULL;
1787 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1789 MpegTSContext *ts = filter->u.section_filter.opaque;
1790 SectionHeader h1, *h = &h1;
1793 const uint8_t *p, *p_end, *desc_list_end;
1794 int program_info_length, pcr_pid, pid, stream_type;
1796 uint32_t prog_reg_desc = 0; /* registration descriptor */
1798 int mp4_descr_count = 0;
1799 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1802 av_dlog(ts->stream, "PMT: len %i\n", section_len);
1803 hex_dump_debug(ts->stream, section, section_len);
1805 p_end = section + section_len - 4;
1807 if (parse_section_header(h, &p, p_end) < 0)
1810 av_dlog(ts->stream, "sid=0x%x sec_num=%d/%d version=%d\n",
1811 h->id, h->sec_num, h->last_sec_num, h->version);
1813 if (h->tid != PMT_TID)
1815 if (!ts->scan_all_pmts && ts->skip_changes)
1818 if (!ts->skip_clear)
1819 clear_program(ts, h->id);
1821 pcr_pid = get16(&p, p_end);
1825 add_pid_to_pmt(ts, h->id, pcr_pid);
1826 set_pcr_pid(ts->stream, h->id, pcr_pid);
1828 av_dlog(ts->stream, "pcr_pid=0x%x\n", pcr_pid);
1830 program_info_length = get16(&p, p_end);
1831 if (program_info_length < 0)
1833 program_info_length &= 0xfff;
1834 while (program_info_length >= 2) {
1836 tag = get8(&p, p_end);
1837 len = get8(&p, p_end);
1839 av_dlog(ts->stream, "program tag: 0x%02x len=%d\n", tag, len);
1841 if (len > program_info_length - 2)
1842 // something else is broken, exit the program_descriptors_loop
1844 program_info_length -= len + 2;
1845 if (tag == 0x1d) { // IOD descriptor
1846 get8(&p, p_end); // scope
1847 get8(&p, p_end); // label
1849 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
1850 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1851 } else if (tag == 0x05 && len >= 4) { // registration descriptor
1852 prog_reg_desc = bytestream_get_le32(&p);
1857 p += program_info_length;
1861 // stop parsing after pmt, we found header
1862 if (!ts->stream->nb_streams)
1865 set_pmt_found(ts, h->id);
1871 stream_type = get8(&p, p_end);
1872 if (stream_type < 0)
1874 pid = get16(&p, p_end);
1878 if (pid == ts->current_pid)
1881 /* now create stream */
1882 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
1883 pes = ts->pids[pid]->u.pes_filter.opaque;
1885 pes->st = avformat_new_stream(pes->stream, NULL);
1888 pes->st->id = pes->pid;
1891 } else if (stream_type != 0x13) {
1893 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
1894 pes = add_pes_stream(ts, pid, pcr_pid);
1896 st = avformat_new_stream(pes->stream, NULL);
1902 int idx = ff_find_stream_index(ts->stream, pid);
1904 st = ts->stream->streams[idx];
1906 st = avformat_new_stream(ts->stream, NULL);
1910 st->codec->codec_type = AVMEDIA_TYPE_DATA;
1917 if (pes && !pes->stream_type)
1918 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
1920 add_pid_to_pmt(ts, h->id, pid);
1922 ff_program_add_stream_index(ts->stream, h->id, st->index);
1924 desc_list_len = get16(&p, p_end);
1925 if (desc_list_len < 0)
1927 desc_list_len &= 0xfff;
1928 desc_list_end = p + desc_list_len;
1929 if (desc_list_end > p_end)
1932 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
1933 desc_list_end, mp4_descr,
1934 mp4_descr_count, pid, ts) < 0)
1937 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
1938 stream_type == 0x83 && pes->sub_st) {
1939 ff_program_add_stream_index(ts->stream, h->id,
1940 pes->sub_st->index);
1941 pes->sub_st->codec->codec_tag = st->codec->codec_tag;
1947 if (!ts->pids[pcr_pid])
1948 mpegts_open_pcr_filter(ts, pcr_pid);
1951 for (i = 0; i < mp4_descr_count; i++)
1952 av_free(mp4_descr[i].dec_config_descr);
1955 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1957 MpegTSContext *ts = filter->u.section_filter.opaque;
1958 SectionHeader h1, *h = &h1;
1959 const uint8_t *p, *p_end;
1963 av_dlog(ts->stream, "PAT:\n");
1964 hex_dump_debug(ts->stream, section, section_len);
1966 p_end = section + section_len - 4;
1968 if (parse_section_header(h, &p, p_end) < 0)
1970 if (h->tid != PAT_TID)
1972 if (ts->skip_changes)
1975 ts->stream->ts_id = h->id;
1979 sid = get16(&p, p_end);
1982 pmt_pid = get16(&p, p_end);
1987 if (pmt_pid == ts->current_pid)
1990 av_dlog(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
1992 if (sid == 0x0000) {
1995 MpegTSFilter *fil = ts->pids[pmt_pid];
1996 program = av_new_program(ts->stream, sid);
1998 program->program_num = sid;
1999 program->pmt_pid = pmt_pid;
2002 if ( fil->type != MPEGTS_SECTION
2003 || fil->pid != pmt_pid
2004 || fil->u.section_filter.section_cb != pmt_cb)
2005 mpegts_close_filter(ts, ts->pids[pmt_pid]);
2007 if (!ts->pids[pmt_pid])
2008 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2009 add_pat_entry(ts, sid);
2010 add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2011 add_pid_to_pmt(ts, sid, pmt_pid);
2017 for (j=0; j<ts->stream->nb_programs; j++) {
2018 for (i = 0; i < ts->nb_prg; i++)
2019 if (ts->prg[i].id == ts->stream->programs[j]->id)
2021 if (i==ts->nb_prg && !ts->skip_clear)
2022 clear_avprogram(ts, ts->stream->programs[j]->id);
2027 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2029 MpegTSContext *ts = filter->u.section_filter.opaque;
2030 SectionHeader h1, *h = &h1;
2031 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2032 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2033 char *name, *provider_name;
2035 av_dlog(ts->stream, "SDT:\n");
2036 hex_dump_debug(ts->stream, section, section_len);
2038 p_end = section + section_len - 4;
2040 if (parse_section_header(h, &p, p_end) < 0)
2042 if (h->tid != SDT_TID)
2044 if (ts->skip_changes)
2046 onid = get16(&p, p_end);
2049 val = get8(&p, p_end);
2053 sid = get16(&p, p_end);
2056 val = get8(&p, p_end);
2059 desc_list_len = get16(&p, p_end);
2060 if (desc_list_len < 0)
2062 desc_list_len &= 0xfff;
2063 desc_list_end = p + desc_list_len;
2064 if (desc_list_end > p_end)
2067 desc_tag = get8(&p, desc_list_end);
2070 desc_len = get8(&p, desc_list_end);
2071 desc_end = p + desc_len;
2072 if (desc_len < 0 || desc_end > desc_list_end)
2075 av_dlog(ts->stream, "tag: 0x%02x len=%d\n",
2076 desc_tag, desc_len);
2080 service_type = get8(&p, p_end);
2081 if (service_type < 0)
2083 provider_name = getstr8(&p, p_end);
2086 name = getstr8(&p, p_end);
2088 AVProgram *program = av_new_program(ts->stream, sid);
2090 av_dict_set(&program->metadata, "service_name", name, 0);
2091 av_dict_set(&program->metadata, "service_provider",
2096 av_free(provider_name);
2107 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2108 const uint8_t *packet);
2110 /* handle one TS packet */
2111 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2114 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2115 has_adaptation, has_payload;
2116 const uint8_t *p, *p_end;
2119 pid = AV_RB16(packet + 1) & 0x1fff;
2120 if (pid && discard_pid(ts, pid))
2122 is_start = packet[1] & 0x40;
2123 tss = ts->pids[pid];
2124 if (ts->auto_guess && !tss && is_start) {
2125 add_pes_stream(ts, pid, -1);
2126 tss = ts->pids[pid];
2130 ts->current_pid = pid;
2132 afc = (packet[3] >> 4) & 3;
2133 if (afc == 0) /* reserved value */
2135 has_adaptation = afc & 2;
2136 has_payload = afc & 1;
2137 is_discontinuity = has_adaptation &&
2138 packet[4] != 0 && /* with length > 0 */
2139 (packet[5] & 0x80); /* and discontinuity indicated */
2141 /* continuity check (currently not used) */
2142 cc = (packet[3] & 0xf);
2143 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2144 cc_ok = pid == 0x1FFF || // null packet PID
2151 av_log(ts->stream, AV_LOG_DEBUG,
2152 "Continuity check failed for pid %d expected %d got %d\n",
2153 pid, expected_cc, cc);
2154 if (tss->type == MPEGTS_PES) {
2155 PESContext *pc = tss->u.pes_filter.opaque;
2156 pc->flags |= AV_PKT_FLAG_CORRUPT;
2161 if (has_adaptation) {
2164 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2165 tss->last_pcr = pcr_h * 300 + pcr_l;
2166 /* skip adaptation field */
2169 /* if past the end of packet, ignore */
2170 p_end = packet + TS_PACKET_SIZE;
2171 if (p >= p_end || !has_payload)
2174 pos = avio_tell(ts->stream->pb);
2176 av_assert0(pos >= TS_PACKET_SIZE);
2177 ts->pos47_full = pos - TS_PACKET_SIZE;
2180 if (tss->type == MPEGTS_SECTION) {
2182 /* pointer field present */
2184 if (len > p_end - p)
2187 /* write remaining section bytes */
2188 write_section_data(ts, tss,
2190 /* check whether filter has been closed */
2196 write_section_data(ts, tss,
2201 write_section_data(ts, tss,
2206 // stop find_stream_info from waiting for more streams
2207 // when all programs have received a PMT
2208 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2210 for (i = 0; i < ts->nb_prg; i++) {
2211 if (!ts->prg[i].pmt_found)
2214 if (i == ts->nb_prg && ts->nb_prg > 0) {
2216 for (i = 0; i < ts->stream->nb_streams; i++) {
2217 AVStream *st = ts->stream->streams[i];
2218 types |= 1<<st->codec->codec_type;
2220 if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2221 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2222 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2229 // Note: The position here points actually behind the current packet.
2230 if (tss->type == MPEGTS_PES) {
2231 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2232 pos - ts->raw_packet_size)) < 0)
2240 static void reanalyze(MpegTSContext *ts) {
2241 AVIOContext *pb = ts->stream->pb;
2242 int64_t pos = avio_tell(pb);
2245 pos -= ts->pos47_full;
2246 if (pos == TS_PACKET_SIZE) {
2247 ts->size_stat[0] ++;
2248 } else if (pos == TS_DVHS_PACKET_SIZE) {
2249 ts->size_stat[1] ++;
2250 } else if (pos == TS_FEC_PACKET_SIZE) {
2251 ts->size_stat[2] ++;
2254 ts->size_stat_count ++;
2255 if (ts->size_stat_count > SIZE_STAT_THRESHOLD) {
2257 if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2258 newsize = TS_PACKET_SIZE;
2259 } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2260 newsize = TS_DVHS_PACKET_SIZE;
2261 } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2262 newsize = TS_FEC_PACKET_SIZE;
2264 if (newsize && newsize != ts->raw_packet_size) {
2265 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2266 ts->raw_packet_size = newsize;
2268 ts->size_stat_count = 0;
2269 memset(ts->size_stat, 0, sizeof(ts->size_stat));
2273 /* XXX: try to find a better synchro over several packets (use
2274 * get_packet_size() ?) */
2275 static int mpegts_resync(AVFormatContext *s)
2277 MpegTSContext *ts = s->priv_data;
2278 AVIOContext *pb = s->pb;
2281 for (i = 0; i < ts->resync_size; i++) {
2286 avio_seek(pb, -1, SEEK_CUR);
2287 reanalyze(s->priv_data);
2291 av_log(s, AV_LOG_ERROR,
2292 "max resync size reached, could not find sync byte\n");
2294 return AVERROR_INVALIDDATA;
2297 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2298 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2299 const uint8_t **data)
2301 AVIOContext *pb = s->pb;
2305 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2306 if (len != TS_PACKET_SIZE)
2307 return len < 0 ? len : AVERROR_EOF;
2308 /* check packet sync byte */
2309 if ((*data)[0] != 0x47) {
2310 /* find a new packet start */
2311 uint64_t pos = avio_tell(pb);
2312 avio_seek(pb, -FFMIN(raw_packet_size, pos), SEEK_CUR);
2314 if (mpegts_resync(s) < 0)
2315 return AVERROR(EAGAIN);
2325 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2327 AVIOContext *pb = s->pb;
2328 int skip = raw_packet_size - TS_PACKET_SIZE;
2330 avio_skip(pb, skip);
2333 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2335 AVFormatContext *s = ts->stream;
2336 uint8_t packet[TS_PACKET_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
2337 const uint8_t *data;
2341 if (avio_tell(s->pb) != ts->last_pos) {
2343 av_dlog(ts->stream, "Skipping after seek\n");
2344 /* seek detected, flush pes buffer */
2345 for (i = 0; i < NB_PID_MAX; i++) {
2347 if (ts->pids[i]->type == MPEGTS_PES) {
2348 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2349 av_buffer_unref(&pes->buffer);
2350 pes->data_index = 0;
2351 pes->state = MPEGTS_SKIP; /* skip until pes header */
2353 ts->pids[i]->last_cc = -1;
2354 ts->pids[i]->last_pcr = -1;
2361 memset(packet + TS_PACKET_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2364 if (nb_packets != 0 && packet_num >= nb_packets ||
2365 ts->stop_parse > 1) {
2366 ret = AVERROR(EAGAIN);
2369 if (ts->stop_parse > 0)
2372 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2375 ret = handle_packet(ts, data);
2376 finished_reading_packet(s, ts->raw_packet_size);
2380 ts->last_pos = avio_tell(s->pb);
2384 static int mpegts_probe(AVProbeData *p)
2386 const int size = p->buf_size;
2390 int check_count = size / TS_FEC_PACKET_SIZE;
2391 #define CHECK_COUNT 10
2392 #define CHECK_BLOCK 100
2394 if (check_count < CHECK_COUNT)
2395 return AVERROR_INVALIDDATA;
2397 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2398 int left = FFMIN(check_count - i, CHECK_BLOCK);
2399 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , NULL, 1);
2400 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, NULL, 1);
2401 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , NULL, 1);
2402 score = FFMAX3(score, dvhs_score, fec_score);
2404 maxscore = FFMAX(maxscore, score);
2407 sumscore = sumscore * CHECK_COUNT / check_count;
2408 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2410 av_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2412 if (sumscore > 6) return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2413 else if (maxscore > 6) return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2415 return AVERROR_INVALIDDATA;
2418 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2419 * (-1) if not available */
2420 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2422 int afc, len, flags;
2426 afc = (packet[3] >> 4) & 3;
2428 return AVERROR_INVALIDDATA;
2433 return AVERROR_INVALIDDATA;
2436 if (!(flags & 0x10))
2437 return AVERROR_INVALIDDATA;
2439 return AVERROR_INVALIDDATA;
2441 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2442 *ppcr_low = ((p[4] & 1) << 8) | p[5];
2446 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2448 /* NOTE: We attempt to seek on non-seekable files as well, as the
2449 * probe buffer usually is big enough. Only warn if the seek failed
2450 * on files where the seek should work. */
2451 if (avio_seek(pb, pos, SEEK_SET) < 0)
2452 av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2455 static int mpegts_read_header(AVFormatContext *s)
2457 MpegTSContext *ts = s->priv_data;
2458 AVIOContext *pb = s->pb;
2459 uint8_t buf[8 * 1024] = {0};
2461 int64_t pos, probesize = s->probesize ? s->probesize : s->probesize2;
2463 if (ffio_ensure_seekback(pb, probesize) < 0)
2464 av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2466 /* read the first 8192 bytes to get packet size */
2467 pos = avio_tell(pb);
2468 len = avio_read(pb, buf, sizeof(buf));
2469 ts->raw_packet_size = get_packet_size(buf, len);
2470 if (ts->raw_packet_size <= 0) {
2471 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2472 ts->raw_packet_size = TS_PACKET_SIZE;
2477 if (s->iformat == &ff_mpegts_demuxer) {
2480 /* first do a scan to get all the services */
2481 seek_back(s, pb, pos);
2483 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2485 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2487 handle_packets(ts, probesize / ts->raw_packet_size);
2488 /* if could not find service, enable auto_guess */
2492 av_dlog(ts->stream, "tuning done\n");
2494 s->ctx_flags |= AVFMTCTX_NOHEADER;
2497 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2498 int64_t pcrs[2], pcr_h;
2499 int packet_count[2];
2500 uint8_t packet[TS_PACKET_SIZE];
2501 const uint8_t *data;
2503 /* only read packets */
2505 st = avformat_new_stream(s, NULL);
2507 return AVERROR(ENOMEM);
2508 avpriv_set_pts_info(st, 60, 1, 27000000);
2509 st->codec->codec_type = AVMEDIA_TYPE_DATA;
2510 st->codec->codec_id = AV_CODEC_ID_MPEG2TS;
2512 /* we iterate until we find two PCRs to estimate the bitrate */
2517 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2520 pid = AV_RB16(data + 1) & 0x1fff;
2521 if ((pcr_pid == -1 || pcr_pid == pid) &&
2522 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2523 finished_reading_packet(s, ts->raw_packet_size);
2525 packet_count[nb_pcrs] = nb_packets;
2526 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2531 finished_reading_packet(s, ts->raw_packet_size);
2536 /* NOTE1: the bitrate is computed without the FEC */
2537 /* NOTE2: it is only the bitrate of the start of the stream */
2538 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2539 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2540 s->bit_rate = TS_PACKET_SIZE * 8 * 27e6 / ts->pcr_incr;
2541 st->codec->bit_rate = s->bit_rate;
2542 st->start_time = ts->cur_pcr;
2543 av_dlog(ts->stream, "start=%0.3f pcr=%0.3f incr=%d\n",
2544 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2547 seek_back(s, pb, pos);
2551 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2553 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
2555 MpegTSContext *ts = s->priv_data;
2557 int64_t pcr_h, next_pcr_h, pos;
2558 int pcr_l, next_pcr_l;
2559 uint8_t pcr_buf[12];
2560 const uint8_t *data;
2562 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2563 return AVERROR(ENOMEM);
2564 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2565 pkt->pos = avio_tell(s->pb);
2567 av_free_packet(pkt);
2570 if (data != pkt->data)
2571 memcpy(pkt->data, data, ts->raw_packet_size);
2572 finished_reading_packet(s, ts->raw_packet_size);
2573 if (ts->mpeg2ts_compute_pcr) {
2574 /* compute exact PCR for each packet */
2575 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2576 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2577 pos = avio_tell(s->pb);
2578 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
2579 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2580 avio_read(s->pb, pcr_buf, 12);
2581 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2582 /* XXX: not precise enough */
2584 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2589 avio_seek(s->pb, pos, SEEK_SET);
2590 /* no next PCR found: we use previous increment */
2591 ts->cur_pcr = pcr_h * 300 + pcr_l;
2593 pkt->pts = ts->cur_pcr;
2594 pkt->duration = ts->pcr_incr;
2595 ts->cur_pcr += ts->pcr_incr;
2597 pkt->stream_index = 0;
2601 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
2603 MpegTSContext *ts = s->priv_data;
2608 ret = handle_packets(ts, 0);
2610 av_free_packet(ts->pkt);
2611 /* flush pes data left */
2612 for (i = 0; i < NB_PID_MAX; i++)
2613 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2614 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2615 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2616 new_pes_packet(pes, pkt);
2617 pes->state = MPEGTS_SKIP;
2624 if (!ret && pkt->size < 0)
2625 ret = AVERROR(EINTR);
2629 static void mpegts_free(MpegTSContext *ts)
2635 for (i = 0; i < NB_PID_MAX; i++)
2637 mpegts_close_filter(ts, ts->pids[i]);
2640 static int mpegts_read_close(AVFormatContext *s)
2642 MpegTSContext *ts = s->priv_data;
2647 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2648 int64_t *ppos, int64_t pos_limit)
2650 MpegTSContext *ts = s->priv_data;
2651 int64_t pos, timestamp;
2652 uint8_t buf[TS_PACKET_SIZE];
2653 int pcr_l, pcr_pid =
2654 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
2655 int pos47 = ts->pos47_full % ts->raw_packet_size;
2657 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
2658 ts->raw_packet_size + pos47;
2659 while(pos < pos_limit) {
2660 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2661 return AV_NOPTS_VALUE;
2662 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2663 return AV_NOPTS_VALUE;
2664 if (buf[0] != 0x47) {
2665 avio_seek(s->pb, -TS_PACKET_SIZE, SEEK_CUR);
2666 if (mpegts_resync(s) < 0)
2667 return AV_NOPTS_VALUE;
2668 pos = avio_tell(s->pb);
2671 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2672 parse_pcr(×tamp, &pcr_l, buf) == 0) {
2676 pos += ts->raw_packet_size;
2679 return AV_NOPTS_VALUE;
2682 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2683 int64_t *ppos, int64_t pos_limit)
2685 MpegTSContext *ts = s->priv_data;
2687 int pos47 = ts->pos47_full % ts->raw_packet_size;
2688 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
2689 ff_read_frame_flush(s);
2690 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2691 return AV_NOPTS_VALUE;
2692 while(pos < pos_limit) {
2695 av_init_packet(&pkt);
2696 ret = av_read_frame(s, &pkt);
2698 return AV_NOPTS_VALUE;
2699 av_free_packet(&pkt);
2700 if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
2701 ff_reduce_index(s, pkt.stream_index);
2702 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
2703 if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
2711 return AV_NOPTS_VALUE;
2714 /**************************************************************/
2715 /* parsing functions - called from other demuxers such as RTP */
2717 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
2721 ts = av_mallocz(sizeof(MpegTSContext));
2724 /* no stream case, currently used by RTP */
2725 ts->raw_packet_size = TS_PACKET_SIZE;
2728 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2729 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2734 /* return the consumed length if a packet was output, or -1 if no
2735 * packet is output */
2736 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
2737 const uint8_t *buf, int len)
2745 if (len < TS_PACKET_SIZE)
2746 return AVERROR_INVALIDDATA;
2747 if (buf[0] != 0x47) {
2751 handle_packet(ts, buf);
2752 buf += TS_PACKET_SIZE;
2753 len -= TS_PACKET_SIZE;
2754 if (ts->stop_parse == 1)
2761 void avpriv_mpegts_parse_close(MpegTSContext *ts)
2767 AVInputFormat ff_mpegts_demuxer = {
2769 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2770 .priv_data_size = sizeof(MpegTSContext),
2771 .read_probe = mpegts_probe,
2772 .read_header = mpegts_read_header,
2773 .read_packet = mpegts_read_packet,
2774 .read_close = mpegts_read_close,
2775 .read_timestamp = mpegts_get_dts,
2776 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2777 .priv_class = &mpegts_class,
2780 AVInputFormat ff_mpegtsraw_demuxer = {
2781 .name = "mpegtsraw",
2782 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
2783 .priv_data_size = sizeof(MpegTSContext),
2784 .read_header = mpegts_read_header,
2785 .read_packet = mpegts_raw_read_packet,
2786 .read_close = mpegts_read_close,
2787 .read_timestamp = mpegts_get_dts,
2788 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2789 .priv_class = &mpegtsraw_class,