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/internal.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/log.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/mathematics.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/avassert.h"
31 #include "libavcodec/bytestream.h"
32 #include "libavcodec/get_bits.h"
33 #include "libavcodec/opus.h"
37 #include "avio_internal.h"
41 /* maximum size in which we look for synchronisation if
42 * synchronisation is lost */
43 #define MAX_RESYNC_SIZE 65536
45 #define MAX_PES_PAYLOAD 200 * 1024
47 #define MAX_MP4_DESCR_COUNT 16
49 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
51 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
52 (modulus) = (dividend) % (divisor); \
53 (prev_dividend) = (dividend); \
56 enum MpegTSFilterType {
62 typedef struct MpegTSFilter MpegTSFilter;
64 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
65 int is_start, int64_t pos);
67 typedef struct MpegTSPESFilter {
72 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
74 typedef void SetServiceCallback (void *opaque, int ret);
76 typedef struct MpegTSSectionFilter {
83 unsigned int check_crc : 1;
84 unsigned int end_of_section_reached : 1;
85 SectionCallback *section_cb;
87 } MpegTSSectionFilter;
92 int last_cc; /* last cc code (-1 if first packet) */
94 enum MpegTSFilterType type;
96 MpegTSPESFilter pes_filter;
97 MpegTSSectionFilter section_filter;
101 #define MAX_PIDS_PER_PROGRAM 64
103 unsigned int id; // program id/service id
104 unsigned int nb_pids;
105 unsigned int pids[MAX_PIDS_PER_PROGRAM];
107 /** have we found pmt for this program */
111 struct MpegTSContext {
112 const AVClass *class;
114 AVFormatContext *stream;
115 /** raw packet size, including FEC if present */
120 #define SIZE_STAT_THRESHOLD 10
124 /** if true, all pids are analyzed to find streams */
127 /** compute exact PCR for each transport stream packet */
128 int mpeg2ts_compute_pcr;
130 /** fix dvb teletext pts */
131 int fix_teletext_pts;
133 int64_t cur_pcr; /**< used to estimate the exact PCR */
134 int pcr_incr; /**< used to estimate the exact PCR */
136 /* data needed to handle file based ts */
137 /** stop parsing loop */
139 /** packet containing Audio/Video data */
141 /** to detect seek */
151 /******************************************/
152 /* private mpegts data */
154 /** structure to keep track of Program->pids mapping */
158 int8_t crc_validity[NB_PID_MAX];
159 /** filters for various streams specified by PMT + for the PAT and PMT */
160 MpegTSFilter *pids[NB_PID_MAX];
164 #define MPEGTS_OPTIONS \
165 { "resync_size", "set 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 }
167 static const AVOption options[] = {
169 {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
170 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
171 {"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
172 {.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
173 {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
174 { .i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
175 {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
176 {.i64 = 0}, 0, 1, 0 },
177 {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
178 {.i64 = 0}, 0, 1, 0 },
182 static const AVClass mpegts_class = {
183 .class_name = "mpegts demuxer",
184 .item_name = av_default_item_name,
186 .version = LIBAVUTIL_VERSION_INT,
189 static const AVOption raw_options[] = {
191 { "compute_pcr", "compute exact PCR for each transport stream packet",
192 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
193 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
194 { "ts_packetsize", "output option carrying the raw packet size",
195 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
197 AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
201 static const AVClass mpegtsraw_class = {
202 .class_name = "mpegtsraw demuxer",
203 .item_name = av_default_item_name,
204 .option = raw_options,
205 .version = LIBAVUTIL_VERSION_INT,
208 /* TS stream handling */
213 MPEGTS_PESHEADER_FILL,
218 /* enough for PES header + length */
219 #define PES_START_SIZE 6
220 #define PES_HEADER_SIZE 9
221 #define MAX_PES_HEADER_SIZE (9 + 255)
223 typedef struct PESContext {
225 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
228 AVFormatContext *stream;
230 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
231 enum MpegTSState state;
232 /* used to get the format */
234 int flags; /**< copied to the AVPacket flags */
237 int extended_stream_id;
240 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
241 uint8_t header[MAX_PES_HEADER_SIZE];
246 extern AVInputFormat ff_mpegts_demuxer;
248 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
251 for (i = 0; i < ts->nb_prg; i++) {
252 if (ts->prg[i].id == programid) {
259 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
261 AVProgram *prg = NULL;
264 for (i = 0; i < ts->stream->nb_programs; i++)
265 if (ts->stream->programs[i]->id == programid) {
266 prg = ts->stream->programs[i];
271 prg->nb_stream_indexes = 0;
274 static void clear_program(MpegTSContext *ts, unsigned int programid)
278 clear_avprogram(ts, programid);
279 for (i = 0; i < ts->nb_prg; i++)
280 if (ts->prg[i].id == programid) {
281 ts->prg[i].nb_pids = 0;
282 ts->prg[i].pmt_found = 0;
286 static void clear_programs(MpegTSContext *ts)
292 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
295 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
299 p = &ts->prg[ts->nb_prg];
306 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
309 struct Program *p = get_program(ts, programid);
314 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
317 for (i = 0; i < p->nb_pids; i++)
318 if (p->pids[i] == pid)
321 p->pids[p->nb_pids++] = pid;
324 static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
326 struct Program *p = get_program(ts, programid);
333 static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
336 for (i = 0; i < s->nb_programs; i++) {
337 if (s->programs[i]->id == programid) {
338 s->programs[i]->pcr_pid = pid;
345 * @brief discard_pid() decides if the pid is to be discarded according
346 * to caller's programs selection
347 * @param ts : - TS context
349 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
352 static int discard_pid(MpegTSContext *ts, unsigned int pid)
355 int used = 0, discarded = 0;
358 /* If none of the programs have .discard=AVDISCARD_ALL then there's
359 * no way we have to discard this packet */
360 for (k = 0; k < ts->stream->nb_programs; k++)
361 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
363 if (k == ts->stream->nb_programs)
366 for (i = 0; i < ts->nb_prg; i++) {
368 for (j = 0; j < p->nb_pids; j++) {
369 if (p->pids[j] != pid)
371 // is program with id p->id set to be discarded?
372 for (k = 0; k < ts->stream->nb_programs; k++) {
373 if (ts->stream->programs[k]->id == p->id) {
374 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
383 return !used && discarded;
387 * Assemble PES packets out of TS packets, and then call the "section_cb"
388 * function when they are complete.
390 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
391 const uint8_t *buf, int buf_size, int is_start)
393 MpegTSSectionFilter *tss = &tss1->u.section_filter;
397 memcpy(tss->section_buf, buf, buf_size);
398 tss->section_index = buf_size;
399 tss->section_h_size = -1;
400 tss->end_of_section_reached = 0;
402 if (tss->end_of_section_reached)
404 len = 4096 - tss->section_index;
407 memcpy(tss->section_buf + tss->section_index, buf, len);
408 tss->section_index += len;
411 /* compute section length if possible */
412 if (tss->section_h_size == -1 && tss->section_index >= 3) {
413 len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
416 tss->section_h_size = len;
419 if (tss->section_h_size != -1 &&
420 tss->section_index >= tss->section_h_size) {
422 tss->end_of_section_reached = 1;
424 if (tss->check_crc) {
425 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, tss->section_buf, tss->section_h_size);
426 if (tss->section_h_size >= 4)
427 tss->crc = AV_RB32(tss->section_buf + tss->section_h_size - 4);
430 ts->crc_validity[ tss1->pid ] = 100;
431 }else if (ts->crc_validity[ tss1->pid ] > -10) {
432 ts->crc_validity[ tss1->pid ]--;
437 tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
444 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
445 enum MpegTSFilterType type)
447 MpegTSFilter *filter;
449 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x\n", pid);
451 if (pid >= NB_PID_MAX || ts->pids[pid])
453 filter = av_mallocz(sizeof(MpegTSFilter));
456 ts->pids[pid] = filter;
461 filter->last_cc = -1;
462 filter->last_pcr= -1;
467 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
469 SectionCallback *section_cb,
473 MpegTSFilter *filter;
474 MpegTSSectionFilter *sec;
476 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
478 sec = &filter->u.section_filter;
479 sec->section_cb = section_cb;
480 sec->opaque = opaque;
481 sec->section_buf = av_malloc(MAX_SECTION_SIZE);
482 sec->check_crc = check_crc;
485 if (!sec->section_buf) {
492 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
496 MpegTSFilter *filter;
497 MpegTSPESFilter *pes;
499 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
502 pes = &filter->u.pes_filter;
503 pes->pes_cb = pes_cb;
504 pes->opaque = opaque;
508 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
510 return mpegts_open_filter(ts, pid, MPEGTS_PCR);
513 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
518 if (filter->type == MPEGTS_SECTION)
519 av_freep(&filter->u.section_filter.section_buf);
520 else if (filter->type == MPEGTS_PES) {
521 PESContext *pes = filter->u.pes_filter.opaque;
522 av_buffer_unref(&pes->buffer);
523 /* referenced private data will be freed later in
524 * avformat_close_input */
525 if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
526 av_freep(&filter->u.pes_filter.opaque);
531 ts->pids[pid] = NULL;
534 static int analyze(const uint8_t *buf, int size, int packet_size,
537 int stat[TS_MAX_PACKET_SIZE];
542 memset(stat, 0, packet_size * sizeof(*stat));
544 for (i = 0; i < size - 3; i++) {
545 if (buf[i] == 0x47 &&
546 (!probe || (buf[i + 3] & 0x30))) {
547 int x = i % packet_size;
550 if (stat[x] > best_score) {
551 best_score = stat[x];
556 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
559 /* autodetect fec presence. Must have at least 1024 bytes */
560 static int get_packet_size(const uint8_t *buf, int size)
562 int score, fec_score, dvhs_score;
564 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
565 return AVERROR_INVALIDDATA;
567 score = analyze(buf, size, TS_PACKET_SIZE, 0);
568 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, 0);
569 fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, 0);
570 av_log(NULL, AV_LOG_TRACE, "score: %d, dvhs_score: %d, fec_score: %d \n",
571 score, dvhs_score, fec_score);
573 if (score > fec_score && score > dvhs_score)
574 return TS_PACKET_SIZE;
575 else if (dvhs_score > score && dvhs_score > fec_score)
576 return TS_DVHS_PACKET_SIZE;
577 else if (score < fec_score && dvhs_score < fec_score)
578 return TS_FEC_PACKET_SIZE;
580 return AVERROR_INVALIDDATA;
583 typedef struct SectionHeader {
588 uint8_t last_sec_num;
591 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
593 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
596 tssf->last_ver = h->version;
597 tssf->last_crc = tssf->crc;
602 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
609 return AVERROR_INVALIDDATA;
615 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
622 return AVERROR_INVALIDDATA;
629 /* read and allocate a DVB string preceded by its length */
630 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
637 len = get8(&p, p_end);
642 str = av_malloc(len + 1);
652 static int parse_section_header(SectionHeader *h,
653 const uint8_t **pp, const uint8_t *p_end)
657 val = get8(pp, p_end);
662 val = get16(pp, p_end);
666 val = get8(pp, p_end);
669 h->version = (val >> 1) & 0x1f;
670 val = get8(pp, p_end);
674 val = get8(pp, p_end);
677 h->last_sec_num = val;
681 typedef struct StreamType {
682 uint32_t stream_type;
683 enum AVMediaType codec_type;
684 enum AVCodecID codec_id;
687 static const StreamType ISO_types[] = {
688 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
689 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
690 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
691 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
692 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
693 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
694 /* Makito encoder sets stream type 0x11 for AAC,
695 * so auto-detect LOAS/LATM instead of hardcoding it. */
696 #if !CONFIG_LOAS_DEMUXER
697 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
699 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
700 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
701 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
702 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
703 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
704 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
705 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
709 static const StreamType HDMV_types[] = {
710 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
711 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
712 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
713 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
714 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
715 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
716 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
717 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
718 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
719 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
720 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
725 static const StreamType MISC_types[] = {
726 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
727 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
731 static const StreamType REGD_types[] = {
732 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
733 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
734 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
735 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
736 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
737 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
738 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
739 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
740 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
741 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
745 static const StreamType METADATA_types[] = {
746 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
747 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
751 /* descriptor present */
752 static const StreamType DESC_types[] = {
753 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
754 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
755 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
756 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
757 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
761 static void mpegts_find_stream_type(AVStream *st,
762 uint32_t stream_type,
763 const StreamType *types)
765 for (; types->stream_type; types++)
766 if (stream_type == types->stream_type) {
767 if (st->codecpar->codec_type != types->codec_type ||
768 st->codecpar->codec_id != types->codec_id) {
769 st->codecpar->codec_type = types->codec_type;
770 st->codecpar->codec_id = types->codec_id;
771 st->internal->need_context_update = 1;
773 st->request_probe = 0;
778 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
779 uint32_t stream_type, uint32_t prog_reg_desc)
781 int old_codec_type = st->codecpar->codec_type;
782 int old_codec_id = st->codecpar->codec_id;
783 int old_codec_tag = st->codecpar->codec_tag;
785 if (avcodec_is_open(st->internal->avctx)) {
786 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
790 avpriv_set_pts_info(st, 33, 1, 90000);
792 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
793 st->codecpar->codec_id = AV_CODEC_ID_NONE;
794 st->need_parsing = AVSTREAM_PARSE_FULL;
796 pes->stream_type = stream_type;
798 av_log(pes->stream, AV_LOG_DEBUG,
799 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
800 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
802 st->codecpar->codec_tag = pes->stream_type;
804 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
805 if (pes->stream_type == 4)
806 st->request_probe = 50;
807 if ((prog_reg_desc == AV_RL32("HDMV") ||
808 prog_reg_desc == AV_RL32("HDPR")) &&
809 st->codecpar->codec_id == AV_CODEC_ID_NONE) {
810 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
811 if (pes->stream_type == 0x83) {
812 // HDMV TrueHD streams also contain an AC3 coded version of the
813 // audio track - add a second stream for this
815 // priv_data cannot be shared between streams
816 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
818 return AVERROR(ENOMEM);
819 memcpy(sub_pes, pes, sizeof(*sub_pes));
821 sub_st = avformat_new_stream(pes->stream, NULL);
824 return AVERROR(ENOMEM);
827 sub_st->id = pes->pid;
828 avpriv_set_pts_info(sub_st, 33, 1, 90000);
829 sub_st->priv_data = sub_pes;
830 sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
831 sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
832 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
833 sub_pes->sub_st = pes->sub_st = sub_st;
836 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
837 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
838 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
839 st->codecpar->codec_id = old_codec_id;
840 st->codecpar->codec_type = old_codec_type;
842 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
843 (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
844 st->probe_packets > 0 &&
845 stream_type == STREAM_TYPE_PRIVATE_DATA) {
846 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
847 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
848 st->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
851 /* queue a context update if properties changed */
852 if (old_codec_type != st->codecpar->codec_type ||
853 old_codec_id != st->codecpar->codec_id ||
854 old_codec_tag != st->codecpar->codec_tag)
855 st->internal->need_context_update = 1;
860 static void reset_pes_packet_state(PESContext *pes)
862 pes->pts = AV_NOPTS_VALUE;
863 pes->dts = AV_NOPTS_VALUE;
866 av_buffer_unref(&pes->buffer);
869 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
875 pkt->buf = pes->buffer;
876 pkt->data = pes->buffer->data;
877 pkt->size = pes->data_index;
879 if (pes->total_size != MAX_PES_PAYLOAD &&
880 pes->pes_header_size + pes->data_index != pes->total_size +
882 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
883 pes->flags |= AV_PKT_FLAG_CORRUPT;
885 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
887 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
888 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
889 pkt->stream_index = pes->sub_st->index;
891 pkt->stream_index = pes->st->index;
894 /* store position of first TS packet of this PES packet */
895 pkt->pos = pes->ts_packet_pos;
896 pkt->flags = pes->flags;
899 reset_pes_packet_state(pes);
901 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
903 return AVERROR(ENOMEM);
904 *sd = pes->stream_id;
909 static uint64_t get_ts64(GetBitContext *gb, int bits)
911 if (get_bits_left(gb) < bits)
912 return AV_NOPTS_VALUE;
913 return get_bits64(gb, bits);
916 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
917 const uint8_t *buf, int buf_size)
920 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
921 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
922 int dts_flag = -1, cts_flag = -1;
923 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
924 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
925 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
927 memcpy(buf_padded, buf, buf_padded_size);
929 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
931 if (sl->use_au_start)
932 au_start_flag = get_bits1(&gb);
934 au_end_flag = get_bits1(&gb);
935 if (!sl->use_au_start && !sl->use_au_end)
936 au_start_flag = au_end_flag = 1;
938 ocr_flag = get_bits1(&gb);
940 idle_flag = get_bits1(&gb);
942 padding_flag = get_bits1(&gb);
944 padding_bits = get_bits(&gb, 3);
946 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
947 if (sl->packet_seq_num_len)
948 skip_bits_long(&gb, sl->packet_seq_num_len);
949 if (sl->degr_prior_len)
951 skip_bits(&gb, sl->degr_prior_len);
953 skip_bits_long(&gb, sl->ocr_len);
955 if (sl->use_rand_acc_pt)
957 if (sl->au_seq_num_len > 0)
958 skip_bits_long(&gb, sl->au_seq_num_len);
959 if (sl->use_timestamps) {
960 dts_flag = get_bits1(&gb);
961 cts_flag = get_bits1(&gb);
964 if (sl->inst_bitrate_len)
965 inst_bitrate_flag = get_bits1(&gb);
967 dts = get_ts64(&gb, sl->timestamp_len);
969 cts = get_ts64(&gb, sl->timestamp_len);
971 skip_bits_long(&gb, sl->au_len);
972 if (inst_bitrate_flag)
973 skip_bits_long(&gb, sl->inst_bitrate_len);
976 if (dts != AV_NOPTS_VALUE)
978 if (cts != AV_NOPTS_VALUE)
981 if (sl->timestamp_len && sl->timestamp_res)
982 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
984 return (get_bits_count(&gb) + 7) >> 3;
987 /* return non zero if a packet could be constructed */
988 static int mpegts_push_data(MpegTSFilter *filter,
989 const uint8_t *buf, int buf_size, int is_start,
992 PESContext *pes = filter->u.pes_filter.opaque;
993 MpegTSContext *ts = pes->ts;
1001 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1002 ret = new_pes_packet(pes, ts->pkt);
1007 reset_pes_packet_state(pes);
1009 pes->state = MPEGTS_HEADER;
1010 pes->ts_packet_pos = pos;
1013 while (buf_size > 0) {
1014 switch (pes->state) {
1016 len = PES_START_SIZE - pes->data_index;
1019 memcpy(pes->header + pes->data_index, p, len);
1020 pes->data_index += len;
1023 if (pes->data_index == PES_START_SIZE) {
1024 /* we got all the PES or section header. We can now
1026 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1027 pes->header[2] == 0x01) {
1028 /* it must be an mpeg2 PES stream */
1029 code = pes->header[3] | 0x100;
1030 av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1032 pes->stream_id = pes->header[3];
1034 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1036 pes->sub_st->discard == AVDISCARD_ALL)) ||
1037 code == 0x1be) /* padding_stream */
1040 /* stream not present in PMT */
1042 if (ts->skip_changes)
1045 pes->st = avformat_new_stream(ts->stream, NULL);
1047 return AVERROR(ENOMEM);
1048 pes->st->id = pes->pid;
1049 mpegts_set_stream_info(pes->st, pes, 0, 0);
1052 pes->total_size = AV_RB16(pes->header + 4);
1053 /* NOTE: a zero total size means the PES size is
1055 if (!pes->total_size)
1056 pes->total_size = MAX_PES_PAYLOAD;
1058 /* allocate pes buffer */
1059 pes->buffer = av_buffer_alloc(pes->total_size +
1060 AV_INPUT_BUFFER_PADDING_SIZE);
1062 return AVERROR(ENOMEM);
1064 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1065 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1066 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1067 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1068 pes->state = MPEGTS_PESHEADER;
1069 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1070 av_log(pes->stream, AV_LOG_TRACE,
1071 "pid=%x stream_type=%x probing\n",
1074 pes->st->request_probe = 1;
1077 pes->pes_header_size = 6;
1078 pes->state = MPEGTS_PAYLOAD;
1079 pes->data_index = 0;
1082 /* otherwise, it should be a table */
1085 pes->state = MPEGTS_SKIP;
1090 /**********************************************/
1091 /* PES packing parsing */
1092 case MPEGTS_PESHEADER:
1093 len = PES_HEADER_SIZE - pes->data_index;
1095 return AVERROR_INVALIDDATA;
1098 memcpy(pes->header + pes->data_index, p, len);
1099 pes->data_index += len;
1102 if (pes->data_index == PES_HEADER_SIZE) {
1103 pes->pes_header_size = pes->header[8] + 9;
1104 pes->state = MPEGTS_PESHEADER_FILL;
1107 case MPEGTS_PESHEADER_FILL:
1108 len = pes->pes_header_size - pes->data_index;
1110 return AVERROR_INVALIDDATA;
1113 memcpy(pes->header + pes->data_index, p, len);
1114 pes->data_index += len;
1117 if (pes->data_index == pes->pes_header_size) {
1119 unsigned int flags, pes_ext, skip;
1121 flags = pes->header[7];
1122 r = pes->header + 9;
1123 pes->pts = AV_NOPTS_VALUE;
1124 pes->dts = AV_NOPTS_VALUE;
1125 if ((flags & 0xc0) == 0x80) {
1126 pes->dts = pes->pts = ff_parse_pes_pts(r);
1128 } else if ((flags & 0xc0) == 0xc0) {
1129 pes->pts = ff_parse_pes_pts(r);
1131 pes->dts = ff_parse_pes_pts(r);
1134 pes->extended_stream_id = -1;
1135 if (flags & 0x01) { /* PES extension */
1137 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1138 skip = (pes_ext >> 4) & 0xb;
1141 if ((pes_ext & 0x41) == 0x01 &&
1142 (r + 2) <= (pes->header + pes->pes_header_size)) {
1143 /* PES extension 2 */
1144 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1145 pes->extended_stream_id = r[1];
1149 /* we got the full header. We parse it and get the payload */
1150 pes->state = MPEGTS_PAYLOAD;
1151 pes->data_index = 0;
1152 if (pes->stream_type == 0x12 && buf_size > 0) {
1153 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1155 pes->pes_header_size += sl_header_bytes;
1156 p += sl_header_bytes;
1157 buf_size -= sl_header_bytes;
1159 if (pes->stream_type == 0x15 && buf_size >= 5) {
1160 /* skip metadata access unit header */
1161 pes->pes_header_size += 5;
1165 if ( pes->ts->fix_teletext_pts
1166 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1167 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1169 AVProgram *p = NULL;
1170 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1171 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1172 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1174 AVStream *st = NULL;
1175 if (f->type == MPEGTS_PES) {
1176 PESContext *pcrpes = f->u.pes_filter.opaque;
1179 } else if (f->type == MPEGTS_PCR) {
1181 for (i = 0; i < p->nb_stream_indexes; i++) {
1182 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1183 if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1187 if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1188 // teletext packets do not always have correct timestamps,
1189 // the standard says they should be handled after 40.6 ms at most,
1190 // and the pcr error to this packet should be no more than 100 ms.
1191 // TODO: we should interpolate the PCR, not just use the last one
1192 int64_t pcr = f->last_pcr / 300;
1193 pes->st->pts_wrap_reference = st->pts_wrap_reference;
1194 pes->st->pts_wrap_behavior = st->pts_wrap_behavior;
1195 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1196 pes->pts = pes->dts = pcr;
1197 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1198 pes->dts > pcr + 3654 + 9000) {
1199 pes->pts = pes->dts = pcr + 3654 + 9000;
1200 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1201 pes->dts > pcr + 10*90000) { //10sec
1202 pes->pts = pes->dts = pcr + 3654 + 9000;
1212 case MPEGTS_PAYLOAD:
1214 if (pes->data_index > 0 &&
1215 pes->data_index + buf_size > pes->total_size) {
1216 ret = new_pes_packet(pes, ts->pkt);
1219 pes->total_size = MAX_PES_PAYLOAD;
1220 pes->buffer = av_buffer_alloc(pes->total_size +
1221 AV_INPUT_BUFFER_PADDING_SIZE);
1223 return AVERROR(ENOMEM);
1225 } else if (pes->data_index == 0 &&
1226 buf_size > pes->total_size) {
1227 // pes packet size is < ts size packet and pes data is padded with 0xff
1228 // not sure if this is legal in ts but see issue #2392
1229 buf_size = pes->total_size;
1231 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1232 pes->data_index += buf_size;
1233 /* emit complete packets with known packet size
1234 * decreases demuxer delay for infrequent packets like subtitles from
1235 * a couple of seconds to milliseconds for properly muxed files.
1236 * total_size is the number of bytes following pes_packet_length
1237 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1238 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1239 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1241 ret = new_pes_packet(pes, ts->pkt);
1257 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1262 /* if no pid found, then add a pid context */
1263 pes = av_mallocz(sizeof(PESContext));
1267 pes->stream = ts->stream;
1269 pes->pcr_pid = pcr_pid;
1270 pes->state = MPEGTS_SKIP;
1271 pes->pts = AV_NOPTS_VALUE;
1272 pes->dts = AV_NOPTS_VALUE;
1273 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1282 typedef struct MP4DescrParseContext {
1286 Mp4Descr *active_descr;
1288 int max_descr_count;
1290 int predefined_SLConfigDescriptor_seen;
1291 } MP4DescrParseContext;
1293 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1294 const uint8_t *buf, unsigned size,
1295 Mp4Descr *descr, int max_descr_count)
1298 if (size > (1 << 30))
1299 return AVERROR_INVALIDDATA;
1301 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1302 NULL, NULL, NULL, NULL)) < 0)
1309 d->active_descr = NULL;
1310 d->max_descr_count = max_descr_count;
1315 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1317 int64_t new_off = avio_tell(pb);
1318 (*len) -= new_off - *off;
1322 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1325 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1328 int ret = parse_mp4_descr(d, off, len, 0);
1331 update_offsets(&d->pb, &off, &len);
1336 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1338 avio_rb16(&d->pb); // ID
1344 update_offsets(&d->pb, &off, &len);
1345 return parse_mp4_descr_arr(d, off, len);
1348 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1353 id_flags = avio_rb16(&d->pb);
1354 if (!(id_flags & 0x0020)) { // URL_Flag
1355 update_offsets(&d->pb, &off, &len);
1356 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1362 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1365 if (d->descr_count >= d->max_descr_count)
1366 return AVERROR_INVALIDDATA;
1367 ff_mp4_parse_es_descr(&d->pb, &es_id);
1368 d->active_descr = d->descr + (d->descr_count++);
1370 d->active_descr->es_id = es_id;
1371 update_offsets(&d->pb, &off, &len);
1372 parse_mp4_descr(d, off, len, MP4DecConfigDescrTag);
1373 update_offsets(&d->pb, &off, &len);
1375 parse_mp4_descr(d, off, len, MP4SLDescrTag);
1376 d->active_descr = NULL;
1380 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1383 Mp4Descr *descr = d->active_descr;
1385 return AVERROR_INVALIDDATA;
1386 d->active_descr->dec_config_descr = av_malloc(len);
1387 if (!descr->dec_config_descr)
1388 return AVERROR(ENOMEM);
1389 descr->dec_config_descr_len = len;
1390 avio_read(&d->pb, descr->dec_config_descr, len);
1394 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1396 Mp4Descr *descr = d->active_descr;
1399 return AVERROR_INVALIDDATA;
1401 predefined = avio_r8(&d->pb);
1404 int flags = avio_r8(&d->pb);
1405 descr->sl.use_au_start = !!(flags & 0x80);
1406 descr->sl.use_au_end = !!(flags & 0x40);
1407 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1408 descr->sl.use_padding = !!(flags & 0x08);
1409 descr->sl.use_timestamps = !!(flags & 0x04);
1410 descr->sl.use_idle = !!(flags & 0x02);
1411 descr->sl.timestamp_res = avio_rb32(&d->pb);
1413 descr->sl.timestamp_len = avio_r8(&d->pb);
1414 if (descr->sl.timestamp_len > 64) {
1415 avpriv_request_sample(NULL, "timestamp_len > 64");
1416 descr->sl.timestamp_len = 64;
1417 return AVERROR_PATCHWELCOME;
1419 descr->sl.ocr_len = avio_r8(&d->pb);
1420 descr->sl.au_len = avio_r8(&d->pb);
1421 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1422 lengths = avio_rb16(&d->pb);
1423 descr->sl.degr_prior_len = lengths >> 12;
1424 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1425 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1426 } else if (!d->predefined_SLConfigDescriptor_seen){
1427 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1428 d->predefined_SLConfigDescriptor_seen = 1;
1433 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1437 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1438 update_offsets(&d->pb, &off, &len);
1439 if (len < 0 || len1 > len || len1 <= 0) {
1440 av_log(d->s, AV_LOG_ERROR,
1441 "Tag %x length violation new length %d bytes remaining %d\n",
1443 return AVERROR_INVALIDDATA;
1446 if (d->level++ >= MAX_LEVEL) {
1447 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1451 if (target_tag && tag != target_tag) {
1452 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1459 parse_MP4IODescrTag(d, off, len1);
1462 parse_MP4ODescrTag(d, off, len1);
1465 parse_MP4ESDescrTag(d, off, len1);
1467 case MP4DecConfigDescrTag:
1468 parse_MP4DecConfigDescrTag(d, off, len1);
1471 parse_MP4SLDescrTag(d, off, len1);
1478 avio_seek(&d->pb, off + len1, SEEK_SET);
1482 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1483 Mp4Descr *descr, int *descr_count, int max_descr_count)
1485 MP4DescrParseContext d;
1488 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1492 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1494 *descr_count = d.descr_count;
1498 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1499 Mp4Descr *descr, int *descr_count, int max_descr_count)
1501 MP4DescrParseContext d;
1504 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1508 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1510 *descr_count = d.descr_count;
1514 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1517 MpegTSContext *ts = filter->u.section_filter.opaque;
1518 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1520 const uint8_t *p, *p_end;
1522 int mp4_descr_count = 0;
1523 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1525 AVFormatContext *s = ts->stream;
1527 p_end = section + section_len - 4;
1529 if (parse_section_header(&h, &p, p_end) < 0)
1531 if (h.tid != M4OD_TID)
1533 if (skip_identical(&h, tssf))
1536 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1537 MAX_MP4_DESCR_COUNT);
1539 for (pid = 0; pid < NB_PID_MAX; pid++) {
1542 for (i = 0; i < mp4_descr_count; i++) {
1545 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1547 if (ts->pids[pid]->type != MPEGTS_PES) {
1548 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1551 pes = ts->pids[pid]->u.pes_filter.opaque;
1556 pes->sl = mp4_descr[i].sl;
1558 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1559 mp4_descr[i].dec_config_descr_len, 0,
1560 NULL, NULL, NULL, NULL);
1561 ff_mp4_read_dec_config_descr(s, st, &pb);
1562 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1563 st->codecpar->extradata_size > 0)
1564 st->need_parsing = 0;
1565 if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1566 st->codecpar->extradata_size > 0)
1567 st->need_parsing = 0;
1569 st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1570 st->internal->need_context_update = 1;
1573 for (i = 0; i < mp4_descr_count; i++)
1574 av_free(mp4_descr[i].dec_config_descr);
1577 static const uint8_t opus_coupled_stream_cnt[9] = {
1578 1, 0, 1, 1, 2, 2, 2, 3, 3
1581 static const uint8_t opus_stream_cnt[9] = {
1582 1, 1, 1, 2, 2, 3, 4, 4, 5,
1585 static const uint8_t opus_channel_map[8][8] = {
1593 { 0,6,1,2,3,4,5,7 },
1596 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1597 const uint8_t **pp, const uint8_t *desc_list_end,
1598 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1601 const uint8_t *desc_end;
1602 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1606 desc_tag = get8(pp, desc_list_end);
1608 return AVERROR_INVALIDDATA;
1609 desc_len = get8(pp, desc_list_end);
1611 return AVERROR_INVALIDDATA;
1612 desc_end = *pp + desc_len;
1613 if (desc_end > desc_list_end)
1614 return AVERROR_INVALIDDATA;
1616 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1618 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1619 stream_type == STREAM_TYPE_PRIVATE_DATA)
1620 mpegts_find_stream_type(st, desc_tag, DESC_types);
1623 case 0x1E: /* SL descriptor */
1624 desc_es_id = get16(pp, desc_end);
1627 if (ts && ts->pids[pid])
1628 ts->pids[pid]->es_id = desc_es_id;
1629 for (i = 0; i < mp4_descr_count; i++)
1630 if (mp4_descr[i].dec_config_descr_len &&
1631 mp4_descr[i].es_id == desc_es_id) {
1633 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1634 mp4_descr[i].dec_config_descr_len, 0,
1635 NULL, NULL, NULL, NULL);
1636 ff_mp4_read_dec_config_descr(fc, st, &pb);
1637 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1638 st->codecpar->extradata_size > 0) {
1639 st->need_parsing = 0;
1640 st->internal->need_context_update = 1;
1642 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1643 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1646 case 0x1F: /* FMC descriptor */
1647 if (get16(pp, desc_end) < 0)
1649 if (mp4_descr_count > 0 &&
1650 (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1651 (st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1652 st->request_probe > 0) &&
1653 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1655 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1656 mp4_descr->dec_config_descr_len, 0,
1657 NULL, NULL, NULL, NULL);
1658 ff_mp4_read_dec_config_descr(fc, st, &pb);
1659 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1660 st->codecpar->extradata_size > 0) {
1661 st->request_probe = st->need_parsing = 0;
1662 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1663 st->internal->need_context_update = 1;
1667 case 0x56: /* DVB teletext descriptor */
1669 uint8_t *extradata = NULL;
1670 int language_count = desc_len / 5;
1672 if (desc_len > 0 && desc_len % 5 != 0)
1673 return AVERROR_INVALIDDATA;
1675 if (language_count > 0) {
1676 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1677 av_assert0(language_count <= sizeof(language) / 4);
1679 if (st->codecpar->extradata == NULL) {
1680 if (ff_alloc_extradata(st->codecpar, language_count * 2)) {
1681 return AVERROR(ENOMEM);
1685 if (st->codecpar->extradata_size < language_count * 2)
1686 return AVERROR_INVALIDDATA;
1688 extradata = st->codecpar->extradata;
1690 for (i = 0; i < language_count; i++) {
1691 language[i * 4 + 0] = get8(pp, desc_end);
1692 language[i * 4 + 1] = get8(pp, desc_end);
1693 language[i * 4 + 2] = get8(pp, desc_end);
1694 language[i * 4 + 3] = ',';
1696 memcpy(extradata, *pp, 2);
1702 language[i * 4 - 1] = 0;
1703 av_dict_set(&st->metadata, "language", language, 0);
1704 st->internal->need_context_update = 1;
1708 case 0x59: /* subtitling descriptor */
1710 /* 8 bytes per DVB subtitle substream data:
1711 * ISO_639_language_code (3 bytes),
1712 * subtitling_type (1 byte),
1713 * composition_page_id (2 bytes),
1714 * ancillary_page_id (2 bytes) */
1715 int language_count = desc_len / 8;
1717 if (desc_len > 0 && desc_len % 8 != 0)
1718 return AVERROR_INVALIDDATA;
1720 if (language_count > 1) {
1721 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1724 if (language_count > 0) {
1727 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1728 av_assert0(language_count <= sizeof(language) / 4);
1730 if (st->codecpar->extradata == NULL) {
1731 if (ff_alloc_extradata(st->codecpar, language_count * 5)) {
1732 return AVERROR(ENOMEM);
1736 if (st->codecpar->extradata_size < language_count * 5)
1737 return AVERROR_INVALIDDATA;
1739 extradata = st->codecpar->extradata;
1741 for (i = 0; i < language_count; i++) {
1742 language[i * 4 + 0] = get8(pp, desc_end);
1743 language[i * 4 + 1] = get8(pp, desc_end);
1744 language[i * 4 + 2] = get8(pp, desc_end);
1745 language[i * 4 + 3] = ',';
1747 /* hearing impaired subtitles detection using subtitling_type */
1749 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1750 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1751 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1752 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1753 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1754 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1755 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1759 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1760 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1766 language[i * 4 - 1] = 0;
1767 av_dict_set(&st->metadata, "language", language, 0);
1768 st->internal->need_context_update = 1;
1772 case 0x0a: /* ISO 639 language descriptor */
1773 for (i = 0; i + 4 <= desc_len; i += 4) {
1774 language[i + 0] = get8(pp, desc_end);
1775 language[i + 1] = get8(pp, desc_end);
1776 language[i + 2] = get8(pp, desc_end);
1777 language[i + 3] = ',';
1778 switch (get8(pp, desc_end)) {
1780 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1783 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1786 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1790 if (i && language[0]) {
1791 language[i - 1] = 0;
1792 av_dict_set(&st->metadata, "language", language, 0);
1795 case 0x05: /* registration descriptor */
1796 st->codecpar->codec_tag = bytestream_get_le32(pp);
1797 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1798 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0)
1799 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1801 case 0x52: /* stream identifier descriptor */
1802 st->stream_identifier = 1 + get8(pp, desc_end);
1804 case 0x26: /* metadata descriptor */
1805 if (get16(pp, desc_end) == 0xFFFF)
1807 if (get8(pp, desc_end) == 0xFF) {
1808 st->codecpar->codec_tag = bytestream_get_le32(pp);
1809 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
1810 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
1813 case 0x7f: /* DVB extension descriptor */
1814 ext_desc_tag = get8(pp, desc_end);
1815 if (ext_desc_tag < 0)
1816 return AVERROR_INVALIDDATA;
1817 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
1818 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1819 if (!st->codecpar->extradata) {
1820 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
1821 AV_INPUT_BUFFER_PADDING_SIZE);
1822 if (!st->codecpar->extradata)
1823 return AVERROR(ENOMEM);
1825 st->codecpar->extradata_size = sizeof(opus_default_extradata);
1826 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
1828 channel_config_code = get8(pp, desc_end);
1829 if (channel_config_code < 0)
1830 return AVERROR_INVALIDDATA;
1831 if (channel_config_code <= 0x8) {
1832 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1833 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
1834 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
1835 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1836 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
1838 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1840 st->need_parsing = AVSTREAM_PARSE_FULL;
1841 st->internal->need_context_update = 1;
1852 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1854 MpegTSContext *ts = filter->u.section_filter.opaque;
1855 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1856 SectionHeader h1, *h = &h1;
1859 const uint8_t *p, *p_end, *desc_list_end;
1860 int program_info_length, pcr_pid, pid, stream_type;
1862 uint32_t prog_reg_desc = 0; /* registration descriptor */
1864 int mp4_descr_count = 0;
1865 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1868 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
1869 hex_dump_debug(ts->stream, section, section_len);
1871 p_end = section + section_len - 4;
1873 if (parse_section_header(h, &p, p_end) < 0)
1875 if (skip_identical(h, tssf))
1878 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d\n",
1879 h->id, h->sec_num, h->last_sec_num, h->version);
1881 if (h->tid != PMT_TID)
1883 if (!ts->scan_all_pmts && ts->skip_changes)
1886 if (!ts->skip_clear)
1887 clear_program(ts, h->id);
1889 pcr_pid = get16(&p, p_end);
1893 add_pid_to_pmt(ts, h->id, pcr_pid);
1894 set_pcr_pid(ts->stream, h->id, pcr_pid);
1896 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
1898 program_info_length = get16(&p, p_end);
1899 if (program_info_length < 0)
1901 program_info_length &= 0xfff;
1902 while (program_info_length >= 2) {
1904 tag = get8(&p, p_end);
1905 len = get8(&p, p_end);
1907 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
1909 if (len > program_info_length - 2)
1910 // something else is broken, exit the program_descriptors_loop
1912 program_info_length -= len + 2;
1913 if (tag == 0x1d) { // IOD descriptor
1914 get8(&p, p_end); // scope
1915 get8(&p, p_end); // label
1917 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
1918 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1919 } else if (tag == 0x05 && len >= 4) { // registration descriptor
1920 prog_reg_desc = bytestream_get_le32(&p);
1925 p += program_info_length;
1929 // stop parsing after pmt, we found header
1930 if (!ts->stream->nb_streams)
1933 set_pmt_found(ts, h->id);
1939 stream_type = get8(&p, p_end);
1940 if (stream_type < 0)
1942 pid = get16(&p, p_end);
1946 if (pid == ts->current_pid)
1949 /* now create stream */
1950 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
1951 pes = ts->pids[pid]->u.pes_filter.opaque;
1953 pes->st = avformat_new_stream(pes->stream, NULL);
1956 pes->st->id = pes->pid;
1959 } else if (stream_type != 0x13) {
1961 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
1962 pes = add_pes_stream(ts, pid, pcr_pid);
1964 st = avformat_new_stream(pes->stream, NULL);
1970 int idx = ff_find_stream_index(ts->stream, pid);
1972 st = ts->stream->streams[idx];
1974 st = avformat_new_stream(ts->stream, NULL);
1978 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
1985 if (pes && !pes->stream_type)
1986 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
1988 add_pid_to_pmt(ts, h->id, pid);
1990 av_program_add_stream_index(ts->stream, h->id, st->index);
1992 desc_list_len = get16(&p, p_end);
1993 if (desc_list_len < 0)
1995 desc_list_len &= 0xfff;
1996 desc_list_end = p + desc_list_len;
1997 if (desc_list_end > p_end)
2000 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2001 desc_list_end, mp4_descr,
2002 mp4_descr_count, pid, ts) < 0)
2005 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2006 stream_type == 0x83 && pes->sub_st) {
2007 av_program_add_stream_index(ts->stream, h->id,
2008 pes->sub_st->index);
2009 pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2015 if (!ts->pids[pcr_pid])
2016 mpegts_open_pcr_filter(ts, pcr_pid);
2019 for (i = 0; i < mp4_descr_count; i++)
2020 av_free(mp4_descr[i].dec_config_descr);
2023 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2025 MpegTSContext *ts = filter->u.section_filter.opaque;
2026 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2027 SectionHeader h1, *h = &h1;
2028 const uint8_t *p, *p_end;
2032 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2033 hex_dump_debug(ts->stream, section, section_len);
2035 p_end = section + section_len - 4;
2037 if (parse_section_header(h, &p, p_end) < 0)
2039 if (h->tid != PAT_TID)
2041 if (ts->skip_changes)
2044 if (skip_identical(h, tssf))
2046 ts->stream->ts_id = h->id;
2050 sid = get16(&p, p_end);
2053 pmt_pid = get16(&p, p_end);
2058 if (pmt_pid == ts->current_pid)
2061 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2063 if (sid == 0x0000) {
2066 MpegTSFilter *fil = ts->pids[pmt_pid];
2067 program = av_new_program(ts->stream, sid);
2069 program->program_num = sid;
2070 program->pmt_pid = pmt_pid;
2073 if ( fil->type != MPEGTS_SECTION
2074 || fil->pid != pmt_pid
2075 || fil->u.section_filter.section_cb != pmt_cb)
2076 mpegts_close_filter(ts, ts->pids[pmt_pid]);
2078 if (!ts->pids[pmt_pid])
2079 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2080 add_pat_entry(ts, sid);
2081 add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2082 add_pid_to_pmt(ts, sid, pmt_pid);
2088 for (j=0; j<ts->stream->nb_programs; j++) {
2089 for (i = 0; i < ts->nb_prg; i++)
2090 if (ts->prg[i].id == ts->stream->programs[j]->id)
2092 if (i==ts->nb_prg && !ts->skip_clear)
2093 clear_avprogram(ts, ts->stream->programs[j]->id);
2098 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2100 MpegTSContext *ts = filter->u.section_filter.opaque;
2101 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2102 SectionHeader h1, *h = &h1;
2103 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2104 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2105 char *name, *provider_name;
2107 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2108 hex_dump_debug(ts->stream, section, section_len);
2110 p_end = section + section_len - 4;
2112 if (parse_section_header(h, &p, p_end) < 0)
2114 if (h->tid != SDT_TID)
2116 if (ts->skip_changes)
2118 if (skip_identical(h, tssf))
2121 onid = get16(&p, p_end);
2124 val = get8(&p, p_end);
2128 sid = get16(&p, p_end);
2131 val = get8(&p, p_end);
2134 desc_list_len = get16(&p, p_end);
2135 if (desc_list_len < 0)
2137 desc_list_len &= 0xfff;
2138 desc_list_end = p + desc_list_len;
2139 if (desc_list_end > p_end)
2142 desc_tag = get8(&p, desc_list_end);
2145 desc_len = get8(&p, desc_list_end);
2146 desc_end = p + desc_len;
2147 if (desc_len < 0 || desc_end > desc_list_end)
2150 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2151 desc_tag, desc_len);
2155 service_type = get8(&p, p_end);
2156 if (service_type < 0)
2158 provider_name = getstr8(&p, p_end);
2161 name = getstr8(&p, p_end);
2163 AVProgram *program = av_new_program(ts->stream, sid);
2165 av_dict_set(&program->metadata, "service_name", name, 0);
2166 av_dict_set(&program->metadata, "service_provider",
2171 av_free(provider_name);
2182 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2183 const uint8_t *packet);
2185 /* handle one TS packet */
2186 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2189 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2190 has_adaptation, has_payload;
2191 const uint8_t *p, *p_end;
2194 pid = AV_RB16(packet + 1) & 0x1fff;
2195 if (pid && discard_pid(ts, pid))
2197 is_start = packet[1] & 0x40;
2198 tss = ts->pids[pid];
2199 if (ts->auto_guess && !tss && is_start) {
2200 add_pes_stream(ts, pid, -1);
2201 tss = ts->pids[pid];
2205 ts->current_pid = pid;
2207 afc = (packet[3] >> 4) & 3;
2208 if (afc == 0) /* reserved value */
2210 has_adaptation = afc & 2;
2211 has_payload = afc & 1;
2212 is_discontinuity = has_adaptation &&
2213 packet[4] != 0 && /* with length > 0 */
2214 (packet[5] & 0x80); /* and discontinuity indicated */
2216 /* continuity check (currently not used) */
2217 cc = (packet[3] & 0xf);
2218 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2219 cc_ok = pid == 0x1FFF || // null packet PID
2226 av_log(ts->stream, AV_LOG_DEBUG,
2227 "Continuity check failed for pid %d expected %d got %d\n",
2228 pid, expected_cc, cc);
2229 if (tss->type == MPEGTS_PES) {
2230 PESContext *pc = tss->u.pes_filter.opaque;
2231 pc->flags |= AV_PKT_FLAG_CORRUPT;
2236 if (has_adaptation) {
2239 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2240 tss->last_pcr = pcr_h * 300 + pcr_l;
2241 /* skip adaptation field */
2244 /* if past the end of packet, ignore */
2245 p_end = packet + TS_PACKET_SIZE;
2246 if (p >= p_end || !has_payload)
2249 pos = avio_tell(ts->stream->pb);
2251 av_assert0(pos >= TS_PACKET_SIZE);
2252 ts->pos47_full = pos - TS_PACKET_SIZE;
2255 if (tss->type == MPEGTS_SECTION) {
2257 /* pointer field present */
2259 if (len > p_end - p)
2262 /* write remaining section bytes */
2263 write_section_data(ts, tss,
2265 /* check whether filter has been closed */
2271 write_section_data(ts, tss,
2276 write_section_data(ts, tss,
2281 // stop find_stream_info from waiting for more streams
2282 // when all programs have received a PMT
2283 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2285 for (i = 0; i < ts->nb_prg; i++) {
2286 if (!ts->prg[i].pmt_found)
2289 if (i == ts->nb_prg && ts->nb_prg > 0) {
2291 for (i = 0; i < ts->stream->nb_streams; i++) {
2292 AVStream *st = ts->stream->streams[i];
2293 types |= 1<<st->codecpar->codec_type;
2295 if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2296 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2297 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2304 // Note: The position here points actually behind the current packet.
2305 if (tss->type == MPEGTS_PES) {
2306 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2307 pos - ts->raw_packet_size)) < 0)
2315 static void reanalyze(MpegTSContext *ts) {
2316 AVIOContext *pb = ts->stream->pb;
2317 int64_t pos = avio_tell(pb);
2320 pos -= ts->pos47_full;
2321 if (pos == TS_PACKET_SIZE) {
2322 ts->size_stat[0] ++;
2323 } else if (pos == TS_DVHS_PACKET_SIZE) {
2324 ts->size_stat[1] ++;
2325 } else if (pos == TS_FEC_PACKET_SIZE) {
2326 ts->size_stat[2] ++;
2329 ts->size_stat_count ++;
2330 if (ts->size_stat_count > SIZE_STAT_THRESHOLD) {
2332 if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2333 newsize = TS_PACKET_SIZE;
2334 } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2335 newsize = TS_DVHS_PACKET_SIZE;
2336 } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2337 newsize = TS_FEC_PACKET_SIZE;
2339 if (newsize && newsize != ts->raw_packet_size) {
2340 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2341 ts->raw_packet_size = newsize;
2343 ts->size_stat_count = 0;
2344 memset(ts->size_stat, 0, sizeof(ts->size_stat));
2348 /* XXX: try to find a better synchro over several packets (use
2349 * get_packet_size() ?) */
2350 static int mpegts_resync(AVFormatContext *s)
2352 MpegTSContext *ts = s->priv_data;
2353 AVIOContext *pb = s->pb;
2356 for (i = 0; i < ts->resync_size; i++) {
2361 avio_seek(pb, -1, SEEK_CUR);
2362 reanalyze(s->priv_data);
2366 av_log(s, AV_LOG_ERROR,
2367 "max resync size reached, could not find sync byte\n");
2369 return AVERROR_INVALIDDATA;
2372 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2373 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2374 const uint8_t **data)
2376 AVIOContext *pb = s->pb;
2380 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2381 if (len != TS_PACKET_SIZE)
2382 return len < 0 ? len : AVERROR_EOF;
2383 /* check packet sync byte */
2384 if ((*data)[0] != 0x47) {
2385 /* find a new packet start */
2386 uint64_t pos = avio_tell(pb);
2387 avio_seek(pb, -FFMIN(raw_packet_size, pos), SEEK_CUR);
2389 if (mpegts_resync(s) < 0)
2390 return AVERROR(EAGAIN);
2400 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2402 AVIOContext *pb = s->pb;
2403 int skip = raw_packet_size - TS_PACKET_SIZE;
2405 avio_skip(pb, skip);
2408 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2410 AVFormatContext *s = ts->stream;
2411 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2412 const uint8_t *data;
2416 if (avio_tell(s->pb) != ts->last_pos) {
2418 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2419 /* seek detected, flush pes buffer */
2420 for (i = 0; i < NB_PID_MAX; i++) {
2422 if (ts->pids[i]->type == MPEGTS_PES) {
2423 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2424 av_buffer_unref(&pes->buffer);
2425 pes->data_index = 0;
2426 pes->state = MPEGTS_SKIP; /* skip until pes header */
2427 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2428 ts->pids[i]->u.section_filter.last_ver = -1;
2430 ts->pids[i]->last_cc = -1;
2431 ts->pids[i]->last_pcr = -1;
2438 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2441 if (nb_packets != 0 && packet_num >= nb_packets ||
2442 ts->stop_parse > 1) {
2443 ret = AVERROR(EAGAIN);
2446 if (ts->stop_parse > 0)
2449 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2452 ret = handle_packet(ts, data);
2453 finished_reading_packet(s, ts->raw_packet_size);
2457 ts->last_pos = avio_tell(s->pb);
2461 static int mpegts_probe(AVProbeData *p)
2463 const int size = p->buf_size;
2467 int check_count = size / TS_FEC_PACKET_SIZE;
2468 #define CHECK_COUNT 10
2469 #define CHECK_BLOCK 100
2471 if (check_count < CHECK_COUNT)
2474 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2475 int left = FFMIN(check_count - i, CHECK_BLOCK);
2476 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2477 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2478 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2479 score = FFMAX3(score, dvhs_score, fec_score);
2481 maxscore = FFMAX(maxscore, score);
2484 sumscore = sumscore * CHECK_COUNT / check_count;
2485 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2487 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2489 if (sumscore > 6) return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2490 else if (maxscore > 6) return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2495 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2496 * (-1) if not available */
2497 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2499 int afc, len, flags;
2503 afc = (packet[3] >> 4) & 3;
2505 return AVERROR_INVALIDDATA;
2510 return AVERROR_INVALIDDATA;
2513 if (!(flags & 0x10))
2514 return AVERROR_INVALIDDATA;
2516 return AVERROR_INVALIDDATA;
2518 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2519 *ppcr_low = ((p[4] & 1) << 8) | p[5];
2523 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2525 /* NOTE: We attempt to seek on non-seekable files as well, as the
2526 * probe buffer usually is big enough. Only warn if the seek failed
2527 * on files where the seek should work. */
2528 if (avio_seek(pb, pos, SEEK_SET) < 0)
2529 av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2532 static int mpegts_read_header(AVFormatContext *s)
2534 MpegTSContext *ts = s->priv_data;
2535 AVIOContext *pb = s->pb;
2536 uint8_t buf[8 * 1024] = {0};
2538 int64_t pos, probesize = s->probesize;
2540 if (ffio_ensure_seekback(pb, probesize) < 0)
2541 av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2543 /* read the first 8192 bytes to get packet size */
2544 pos = avio_tell(pb);
2545 len = avio_read(pb, buf, sizeof(buf));
2546 ts->raw_packet_size = get_packet_size(buf, len);
2547 if (ts->raw_packet_size <= 0) {
2548 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2549 ts->raw_packet_size = TS_PACKET_SIZE;
2554 if (s->iformat == &ff_mpegts_demuxer) {
2557 /* first do a scan to get all the services */
2558 seek_back(s, pb, pos);
2560 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2562 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2564 handle_packets(ts, probesize / ts->raw_packet_size);
2565 /* if could not find service, enable auto_guess */
2569 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2571 s->ctx_flags |= AVFMTCTX_NOHEADER;
2574 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2575 int64_t pcrs[2], pcr_h;
2576 int packet_count[2];
2577 uint8_t packet[TS_PACKET_SIZE];
2578 const uint8_t *data;
2580 /* only read packets */
2582 st = avformat_new_stream(s, NULL);
2584 return AVERROR(ENOMEM);
2585 avpriv_set_pts_info(st, 60, 1, 27000000);
2586 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2587 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
2589 /* we iterate until we find two PCRs to estimate the bitrate */
2594 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2597 pid = AV_RB16(data + 1) & 0x1fff;
2598 if ((pcr_pid == -1 || pcr_pid == pid) &&
2599 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2600 finished_reading_packet(s, ts->raw_packet_size);
2602 packet_count[nb_pcrs] = nb_packets;
2603 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2608 finished_reading_packet(s, ts->raw_packet_size);
2613 /* NOTE1: the bitrate is computed without the FEC */
2614 /* NOTE2: it is only the bitrate of the start of the stream */
2615 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2616 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2617 s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
2618 st->codecpar->bit_rate = s->bit_rate;
2619 st->start_time = ts->cur_pcr;
2620 av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
2621 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2624 seek_back(s, pb, pos);
2628 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2630 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
2632 MpegTSContext *ts = s->priv_data;
2634 int64_t pcr_h, next_pcr_h, pos;
2635 int pcr_l, next_pcr_l;
2636 uint8_t pcr_buf[12];
2637 const uint8_t *data;
2639 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2640 return AVERROR(ENOMEM);
2641 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2642 pkt->pos = avio_tell(s->pb);
2644 av_packet_unref(pkt);
2647 if (data != pkt->data)
2648 memcpy(pkt->data, data, ts->raw_packet_size);
2649 finished_reading_packet(s, ts->raw_packet_size);
2650 if (ts->mpeg2ts_compute_pcr) {
2651 /* compute exact PCR for each packet */
2652 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2653 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2654 pos = avio_tell(s->pb);
2655 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
2656 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2657 avio_read(s->pb, pcr_buf, 12);
2658 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2659 /* XXX: not precise enough */
2661 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2666 avio_seek(s->pb, pos, SEEK_SET);
2667 /* no next PCR found: we use previous increment */
2668 ts->cur_pcr = pcr_h * 300 + pcr_l;
2670 pkt->pts = ts->cur_pcr;
2671 pkt->duration = ts->pcr_incr;
2672 ts->cur_pcr += ts->pcr_incr;
2674 pkt->stream_index = 0;
2678 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
2680 MpegTSContext *ts = s->priv_data;
2685 ret = handle_packets(ts, 0);
2687 av_packet_unref(ts->pkt);
2688 /* flush pes data left */
2689 for (i = 0; i < NB_PID_MAX; i++)
2690 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2691 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2692 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2693 ret = new_pes_packet(pes, pkt);
2696 pes->state = MPEGTS_SKIP;
2703 if (!ret && pkt->size < 0)
2704 ret = AVERROR_INVALIDDATA;
2708 static void mpegts_free(MpegTSContext *ts)
2714 for (i = 0; i < NB_PID_MAX; i++)
2716 mpegts_close_filter(ts, ts->pids[i]);
2719 static int mpegts_read_close(AVFormatContext *s)
2721 MpegTSContext *ts = s->priv_data;
2726 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2727 int64_t *ppos, int64_t pos_limit)
2729 MpegTSContext *ts = s->priv_data;
2730 int64_t pos, timestamp;
2731 uint8_t buf[TS_PACKET_SIZE];
2732 int pcr_l, pcr_pid =
2733 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
2734 int pos47 = ts->pos47_full % ts->raw_packet_size;
2736 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
2737 ts->raw_packet_size + pos47;
2738 while(pos < pos_limit) {
2739 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2740 return AV_NOPTS_VALUE;
2741 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2742 return AV_NOPTS_VALUE;
2743 if (buf[0] != 0x47) {
2744 avio_seek(s->pb, -TS_PACKET_SIZE, SEEK_CUR);
2745 if (mpegts_resync(s) < 0)
2746 return AV_NOPTS_VALUE;
2747 pos = avio_tell(s->pb);
2750 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2751 parse_pcr(×tamp, &pcr_l, buf) == 0) {
2755 pos += ts->raw_packet_size;
2758 return AV_NOPTS_VALUE;
2761 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2762 int64_t *ppos, int64_t pos_limit)
2764 MpegTSContext *ts = s->priv_data;
2766 int pos47 = ts->pos47_full % ts->raw_packet_size;
2767 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
2768 ff_read_frame_flush(s);
2769 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2770 return AV_NOPTS_VALUE;
2771 while(pos < pos_limit) {
2774 av_init_packet(&pkt);
2775 ret = av_read_frame(s, &pkt);
2777 return AV_NOPTS_VALUE;
2778 if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
2779 ff_reduce_index(s, pkt.stream_index);
2780 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
2781 if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
2782 int64_t dts = pkt.dts;
2784 av_packet_unref(&pkt);
2789 av_packet_unref(&pkt);
2792 return AV_NOPTS_VALUE;
2795 /**************************************************************/
2796 /* parsing functions - called from other demuxers such as RTP */
2798 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
2802 ts = av_mallocz(sizeof(MpegTSContext));
2805 /* no stream case, currently used by RTP */
2806 ts->raw_packet_size = TS_PACKET_SIZE;
2809 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2810 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2815 /* return the consumed length if a packet was output, or -1 if no
2816 * packet is output */
2817 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
2818 const uint8_t *buf, int len)
2826 if (len < TS_PACKET_SIZE)
2827 return AVERROR_INVALIDDATA;
2828 if (buf[0] != 0x47) {
2832 handle_packet(ts, buf);
2833 buf += TS_PACKET_SIZE;
2834 len -= TS_PACKET_SIZE;
2835 if (ts->stop_parse == 1)
2842 void avpriv_mpegts_parse_close(MpegTSContext *ts)
2848 AVInputFormat ff_mpegts_demuxer = {
2850 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2851 .priv_data_size = sizeof(MpegTSContext),
2852 .read_probe = mpegts_probe,
2853 .read_header = mpegts_read_header,
2854 .read_packet = mpegts_read_packet,
2855 .read_close = mpegts_read_close,
2856 .read_timestamp = mpegts_get_dts,
2857 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2858 .priv_class = &mpegts_class,
2861 AVInputFormat ff_mpegtsraw_demuxer = {
2862 .name = "mpegtsraw",
2863 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
2864 .priv_data_size = sizeof(MpegTSContext),
2865 .read_header = mpegts_read_header,
2866 .read_packet = mpegts_raw_read_packet,
2867 .read_close = mpegts_read_close,
2868 .read_timestamp = mpegts_get_dts,
2869 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2870 .priv_class = &mpegtsraw_class,