2 * MPEG-2 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 synchronization if
42 * synchronization 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 type=%d\n", pid, type);
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 int pid = AV_RB16(buf+1) & 0x1FFF;
547 int asc = buf[i + 3] & 0x30;
548 if (!probe || pid == 0x1FFF || asc) {
549 int x = i % packet_size;
552 if (stat[x] > best_score) {
553 best_score = stat[x];
559 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
562 /* autodetect fec presence. Must have at least 1024 bytes */
563 static int get_packet_size(const uint8_t *buf, int size)
565 int score, fec_score, dvhs_score;
567 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
568 return AVERROR_INVALIDDATA;
570 score = analyze(buf, size, TS_PACKET_SIZE, 0);
571 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, 0);
572 fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, 0);
573 av_log(NULL, AV_LOG_TRACE, "score: %d, dvhs_score: %d, fec_score: %d \n",
574 score, dvhs_score, fec_score);
576 if (score > fec_score && score > dvhs_score)
577 return TS_PACKET_SIZE;
578 else if (dvhs_score > score && dvhs_score > fec_score)
579 return TS_DVHS_PACKET_SIZE;
580 else if (score < fec_score && dvhs_score < fec_score)
581 return TS_FEC_PACKET_SIZE;
583 return AVERROR_INVALIDDATA;
586 typedef struct SectionHeader {
591 uint8_t last_sec_num;
594 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
596 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
599 tssf->last_ver = h->version;
600 tssf->last_crc = tssf->crc;
605 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
612 return AVERROR_INVALIDDATA;
618 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
625 return AVERROR_INVALIDDATA;
632 /* read and allocate a DVB string preceded by its length */
633 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
640 len = get8(&p, p_end);
645 str = av_malloc(len + 1);
655 static int parse_section_header(SectionHeader *h,
656 const uint8_t **pp, const uint8_t *p_end)
660 val = get8(pp, p_end);
665 val = get16(pp, p_end);
669 val = get8(pp, p_end);
672 h->version = (val >> 1) & 0x1f;
673 val = get8(pp, p_end);
677 val = get8(pp, p_end);
680 h->last_sec_num = val;
684 typedef struct StreamType {
685 uint32_t stream_type;
686 enum AVMediaType codec_type;
687 enum AVCodecID codec_id;
690 static const StreamType ISO_types[] = {
691 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
692 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
693 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
694 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
695 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
696 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
697 /* Makito encoder sets stream type 0x11 for AAC,
698 * so auto-detect LOAS/LATM instead of hardcoding it. */
699 #if !CONFIG_LOAS_DEMUXER
700 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
702 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
703 { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
704 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
705 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
706 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
707 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
708 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
709 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
713 static const StreamType HDMV_types[] = {
714 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
715 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
716 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
717 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
718 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
719 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
720 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
721 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
722 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
723 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
724 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
729 static const StreamType SCTE_types[] = {
730 { 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
735 static const StreamType MISC_types[] = {
736 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
737 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
741 static const StreamType REGD_types[] = {
742 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
743 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
744 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
745 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
746 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
747 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
748 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
749 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
750 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
751 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
752 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
753 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
757 static const StreamType METADATA_types[] = {
758 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
759 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
763 /* descriptor present */
764 static const StreamType DESC_types[] = {
765 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
766 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
767 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
768 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
769 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
773 static void mpegts_find_stream_type(AVStream *st,
774 uint32_t stream_type,
775 const StreamType *types)
777 for (; types->stream_type; types++)
778 if (stream_type == types->stream_type) {
779 if (st->codecpar->codec_type != types->codec_type ||
780 st->codecpar->codec_id != types->codec_id) {
781 st->codecpar->codec_type = types->codec_type;
782 st->codecpar->codec_id = types->codec_id;
783 st->internal->need_context_update = 1;
785 st->request_probe = 0;
790 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
791 uint32_t stream_type, uint32_t prog_reg_desc)
793 int old_codec_type = st->codecpar->codec_type;
794 int old_codec_id = st->codecpar->codec_id;
795 int old_codec_tag = st->codecpar->codec_tag;
797 if (avcodec_is_open(st->internal->avctx)) {
798 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
802 avpriv_set_pts_info(st, 33, 1, 90000);
804 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
805 st->codecpar->codec_id = AV_CODEC_ID_NONE;
806 st->need_parsing = AVSTREAM_PARSE_FULL;
808 pes->stream_type = stream_type;
810 av_log(pes->stream, AV_LOG_DEBUG,
811 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
812 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
814 st->codecpar->codec_tag = pes->stream_type;
816 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
817 if (pes->stream_type == 4 || pes->stream_type == 0x0f)
818 st->request_probe = 50;
819 if ((prog_reg_desc == AV_RL32("HDMV") ||
820 prog_reg_desc == AV_RL32("HDPR")) &&
821 st->codecpar->codec_id == AV_CODEC_ID_NONE) {
822 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
823 if (pes->stream_type == 0x83) {
824 // HDMV TrueHD streams also contain an AC3 coded version of the
825 // audio track - add a second stream for this
827 // priv_data cannot be shared between streams
828 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
830 return AVERROR(ENOMEM);
831 memcpy(sub_pes, pes, sizeof(*sub_pes));
833 sub_st = avformat_new_stream(pes->stream, NULL);
836 return AVERROR(ENOMEM);
839 sub_st->id = pes->pid;
840 avpriv_set_pts_info(sub_st, 33, 1, 90000);
841 sub_st->priv_data = sub_pes;
842 sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
843 sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
844 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
845 sub_pes->sub_st = pes->sub_st = sub_st;
848 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
849 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
850 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
851 st->codecpar->codec_id = old_codec_id;
852 st->codecpar->codec_type = old_codec_type;
854 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
855 (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
856 st->probe_packets > 0 &&
857 stream_type == STREAM_TYPE_PRIVATE_DATA) {
858 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
859 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
860 st->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
863 /* queue a context update if properties changed */
864 if (old_codec_type != st->codecpar->codec_type ||
865 old_codec_id != st->codecpar->codec_id ||
866 old_codec_tag != st->codecpar->codec_tag)
867 st->internal->need_context_update = 1;
872 static void reset_pes_packet_state(PESContext *pes)
874 pes->pts = AV_NOPTS_VALUE;
875 pes->dts = AV_NOPTS_VALUE;
878 av_buffer_unref(&pes->buffer);
881 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
884 pkt->data = (uint8_t *)buffer;
888 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
894 pkt->buf = pes->buffer;
895 pkt->data = pes->buffer->data;
896 pkt->size = pes->data_index;
898 if (pes->total_size != MAX_PES_PAYLOAD &&
899 pes->pes_header_size + pes->data_index != pes->total_size +
901 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
902 pes->flags |= AV_PKT_FLAG_CORRUPT;
904 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
906 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
907 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
908 pkt->stream_index = pes->sub_st->index;
910 pkt->stream_index = pes->st->index;
913 /* store position of first TS packet of this PES packet */
914 pkt->pos = pes->ts_packet_pos;
915 pkt->flags = pes->flags;
918 reset_pes_packet_state(pes);
920 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
922 return AVERROR(ENOMEM);
923 *sd = pes->stream_id;
928 static uint64_t get_ts64(GetBitContext *gb, int bits)
930 if (get_bits_left(gb) < bits)
931 return AV_NOPTS_VALUE;
932 return get_bits64(gb, bits);
935 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
936 const uint8_t *buf, int buf_size)
939 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
940 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
941 int dts_flag = -1, cts_flag = -1;
942 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
943 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
944 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
946 memcpy(buf_padded, buf, buf_padded_size);
948 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
950 if (sl->use_au_start)
951 au_start_flag = get_bits1(&gb);
953 au_end_flag = get_bits1(&gb);
954 if (!sl->use_au_start && !sl->use_au_end)
955 au_start_flag = au_end_flag = 1;
957 ocr_flag = get_bits1(&gb);
959 idle_flag = get_bits1(&gb);
961 padding_flag = get_bits1(&gb);
963 padding_bits = get_bits(&gb, 3);
965 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
966 if (sl->packet_seq_num_len)
967 skip_bits_long(&gb, sl->packet_seq_num_len);
968 if (sl->degr_prior_len)
970 skip_bits(&gb, sl->degr_prior_len);
972 skip_bits_long(&gb, sl->ocr_len);
974 if (sl->use_rand_acc_pt)
976 if (sl->au_seq_num_len > 0)
977 skip_bits_long(&gb, sl->au_seq_num_len);
978 if (sl->use_timestamps) {
979 dts_flag = get_bits1(&gb);
980 cts_flag = get_bits1(&gb);
983 if (sl->inst_bitrate_len)
984 inst_bitrate_flag = get_bits1(&gb);
986 dts = get_ts64(&gb, sl->timestamp_len);
988 cts = get_ts64(&gb, sl->timestamp_len);
990 skip_bits_long(&gb, sl->au_len);
991 if (inst_bitrate_flag)
992 skip_bits_long(&gb, sl->inst_bitrate_len);
995 if (dts != AV_NOPTS_VALUE)
997 if (cts != AV_NOPTS_VALUE)
1000 if (sl->timestamp_len && sl->timestamp_res)
1001 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1003 return (get_bits_count(&gb) + 7) >> 3;
1006 /* return non zero if a packet could be constructed */
1007 static int mpegts_push_data(MpegTSFilter *filter,
1008 const uint8_t *buf, int buf_size, int is_start,
1011 PESContext *pes = filter->u.pes_filter.opaque;
1012 MpegTSContext *ts = pes->ts;
1020 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1021 ret = new_pes_packet(pes, ts->pkt);
1026 reset_pes_packet_state(pes);
1028 pes->state = MPEGTS_HEADER;
1029 pes->ts_packet_pos = pos;
1032 while (buf_size > 0) {
1033 switch (pes->state) {
1035 len = PES_START_SIZE - pes->data_index;
1038 memcpy(pes->header + pes->data_index, p, len);
1039 pes->data_index += len;
1042 if (pes->data_index == PES_START_SIZE) {
1043 /* we got all the PES or section header. We can now
1045 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1046 pes->header[2] == 0x01) {
1047 /* it must be an MPEG-2 PES stream */
1048 code = pes->header[3] | 0x100;
1049 av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1051 pes->stream_id = pes->header[3];
1053 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1055 pes->sub_st->discard == AVDISCARD_ALL)) ||
1056 code == 0x1be) /* padding_stream */
1059 /* stream not present in PMT */
1061 if (ts->skip_changes)
1064 pes->st = avformat_new_stream(ts->stream, NULL);
1066 return AVERROR(ENOMEM);
1067 pes->st->id = pes->pid;
1068 mpegts_set_stream_info(pes->st, pes, 0, 0);
1071 pes->total_size = AV_RB16(pes->header + 4);
1072 /* NOTE: a zero total size means the PES size is
1074 if (!pes->total_size)
1075 pes->total_size = MAX_PES_PAYLOAD;
1077 /* allocate pes buffer */
1078 pes->buffer = av_buffer_alloc(pes->total_size +
1079 AV_INPUT_BUFFER_PADDING_SIZE);
1081 return AVERROR(ENOMEM);
1083 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1084 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1085 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1086 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1087 pes->state = MPEGTS_PESHEADER;
1088 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1089 av_log(pes->stream, AV_LOG_TRACE,
1090 "pid=%x stream_type=%x probing\n",
1093 pes->st->request_probe = 1;
1096 pes->pes_header_size = 6;
1097 pes->state = MPEGTS_PAYLOAD;
1098 pes->data_index = 0;
1101 /* otherwise, it should be a table */
1104 pes->state = MPEGTS_SKIP;
1109 /**********************************************/
1110 /* PES packing parsing */
1111 case MPEGTS_PESHEADER:
1112 len = PES_HEADER_SIZE - pes->data_index;
1114 return AVERROR_INVALIDDATA;
1117 memcpy(pes->header + pes->data_index, p, len);
1118 pes->data_index += len;
1121 if (pes->data_index == PES_HEADER_SIZE) {
1122 pes->pes_header_size = pes->header[8] + 9;
1123 pes->state = MPEGTS_PESHEADER_FILL;
1126 case MPEGTS_PESHEADER_FILL:
1127 len = pes->pes_header_size - pes->data_index;
1129 return AVERROR_INVALIDDATA;
1132 memcpy(pes->header + pes->data_index, p, len);
1133 pes->data_index += len;
1136 if (pes->data_index == pes->pes_header_size) {
1138 unsigned int flags, pes_ext, skip;
1140 flags = pes->header[7];
1141 r = pes->header + 9;
1142 pes->pts = AV_NOPTS_VALUE;
1143 pes->dts = AV_NOPTS_VALUE;
1144 if ((flags & 0xc0) == 0x80) {
1145 pes->dts = pes->pts = ff_parse_pes_pts(r);
1147 } else if ((flags & 0xc0) == 0xc0) {
1148 pes->pts = ff_parse_pes_pts(r);
1150 pes->dts = ff_parse_pes_pts(r);
1153 pes->extended_stream_id = -1;
1154 if (flags & 0x01) { /* PES extension */
1156 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1157 skip = (pes_ext >> 4) & 0xb;
1160 if ((pes_ext & 0x41) == 0x01 &&
1161 (r + 2) <= (pes->header + pes->pes_header_size)) {
1162 /* PES extension 2 */
1163 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1164 pes->extended_stream_id = r[1];
1168 /* we got the full header. We parse it and get the payload */
1169 pes->state = MPEGTS_PAYLOAD;
1170 pes->data_index = 0;
1171 if (pes->stream_type == 0x12 && buf_size > 0) {
1172 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1174 pes->pes_header_size += sl_header_bytes;
1175 p += sl_header_bytes;
1176 buf_size -= sl_header_bytes;
1178 if (pes->stream_type == 0x15 && buf_size >= 5) {
1179 /* skip metadata access unit header */
1180 pes->pes_header_size += 5;
1184 if ( pes->ts->fix_teletext_pts
1185 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1186 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1188 AVProgram *p = NULL;
1189 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1190 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1191 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1193 AVStream *st = NULL;
1194 if (f->type == MPEGTS_PES) {
1195 PESContext *pcrpes = f->u.pes_filter.opaque;
1198 } else if (f->type == MPEGTS_PCR) {
1200 for (i = 0; i < p->nb_stream_indexes; i++) {
1201 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1202 if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1206 if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1207 // teletext packets do not always have correct timestamps,
1208 // the standard says they should be handled after 40.6 ms at most,
1209 // and the pcr error to this packet should be no more than 100 ms.
1210 // TODO: we should interpolate the PCR, not just use the last one
1211 int64_t pcr = f->last_pcr / 300;
1212 pes->st->pts_wrap_reference = st->pts_wrap_reference;
1213 pes->st->pts_wrap_behavior = st->pts_wrap_behavior;
1214 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1215 pes->pts = pes->dts = pcr;
1216 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1217 pes->dts > pcr + 3654 + 9000) {
1218 pes->pts = pes->dts = pcr + 3654 + 9000;
1219 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1220 pes->dts > pcr + 10*90000) { //10sec
1221 pes->pts = pes->dts = pcr + 3654 + 9000;
1231 case MPEGTS_PAYLOAD:
1233 if (pes->data_index > 0 &&
1234 pes->data_index + buf_size > pes->total_size) {
1235 ret = new_pes_packet(pes, ts->pkt);
1238 pes->total_size = MAX_PES_PAYLOAD;
1239 pes->buffer = av_buffer_alloc(pes->total_size +
1240 AV_INPUT_BUFFER_PADDING_SIZE);
1242 return AVERROR(ENOMEM);
1244 } else if (pes->data_index == 0 &&
1245 buf_size > pes->total_size) {
1246 // pes packet size is < ts size packet and pes data is padded with 0xff
1247 // not sure if this is legal in ts but see issue #2392
1248 buf_size = pes->total_size;
1250 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1251 pes->data_index += buf_size;
1252 /* emit complete packets with known packet size
1253 * decreases demuxer delay for infrequent packets like subtitles from
1254 * a couple of seconds to milliseconds for properly muxed files.
1255 * total_size is the number of bytes following pes_packet_length
1256 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1257 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1258 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1260 ret = new_pes_packet(pes, ts->pkt);
1276 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1281 /* if no pid found, then add a pid context */
1282 pes = av_mallocz(sizeof(PESContext));
1286 pes->stream = ts->stream;
1288 pes->pcr_pid = pcr_pid;
1289 pes->state = MPEGTS_SKIP;
1290 pes->pts = AV_NOPTS_VALUE;
1291 pes->dts = AV_NOPTS_VALUE;
1292 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1301 typedef struct MP4DescrParseContext {
1305 Mp4Descr *active_descr;
1307 int max_descr_count;
1309 int predefined_SLConfigDescriptor_seen;
1310 } MP4DescrParseContext;
1312 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1313 const uint8_t *buf, unsigned size,
1314 Mp4Descr *descr, int max_descr_count)
1317 if (size > (1 << 30))
1318 return AVERROR_INVALIDDATA;
1320 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1321 NULL, NULL, NULL, NULL)) < 0)
1328 d->active_descr = NULL;
1329 d->max_descr_count = max_descr_count;
1334 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1336 int64_t new_off = avio_tell(pb);
1337 (*len) -= new_off - *off;
1341 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1344 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1347 int ret = parse_mp4_descr(d, off, len, 0);
1350 update_offsets(&d->pb, &off, &len);
1355 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1357 avio_rb16(&d->pb); // ID
1363 update_offsets(&d->pb, &off, &len);
1364 return parse_mp4_descr_arr(d, off, len);
1367 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1372 id_flags = avio_rb16(&d->pb);
1373 if (!(id_flags & 0x0020)) { // URL_Flag
1374 update_offsets(&d->pb, &off, &len);
1375 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1381 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1386 if (d->descr_count >= d->max_descr_count)
1387 return AVERROR_INVALIDDATA;
1388 ff_mp4_parse_es_descr(&d->pb, &es_id);
1389 d->active_descr = d->descr + (d->descr_count++);
1391 d->active_descr->es_id = es_id;
1392 update_offsets(&d->pb, &off, &len);
1393 if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1395 update_offsets(&d->pb, &off, &len);
1397 ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1398 d->active_descr = NULL;
1402 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1405 Mp4Descr *descr = d->active_descr;
1407 return AVERROR_INVALIDDATA;
1408 d->active_descr->dec_config_descr = av_malloc(len);
1409 if (!descr->dec_config_descr)
1410 return AVERROR(ENOMEM);
1411 descr->dec_config_descr_len = len;
1412 avio_read(&d->pb, descr->dec_config_descr, len);
1416 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1418 Mp4Descr *descr = d->active_descr;
1421 return AVERROR_INVALIDDATA;
1423 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1424 descr->sl.dst = avio_r8(&d->pb); \
1425 if (descr->sl.dst > maxv) { \
1426 descr->sl.dst = maxv; \
1427 return AVERROR_INVALIDDATA; \
1431 predefined = avio_r8(&d->pb);
1434 int flags = avio_r8(&d->pb);
1435 descr->sl.use_au_start = !!(flags & 0x80);
1436 descr->sl.use_au_end = !!(flags & 0x40);
1437 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1438 descr->sl.use_padding = !!(flags & 0x08);
1439 descr->sl.use_timestamps = !!(flags & 0x04);
1440 descr->sl.use_idle = !!(flags & 0x02);
1441 descr->sl.timestamp_res = avio_rb32(&d->pb);
1443 R8_CHECK_CLIP_MAX(timestamp_len, 63);
1444 R8_CHECK_CLIP_MAX(ocr_len, 63);
1445 R8_CHECK_CLIP_MAX(au_len, 31);
1446 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1447 lengths = avio_rb16(&d->pb);
1448 descr->sl.degr_prior_len = lengths >> 12;
1449 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1450 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1451 } else if (!d->predefined_SLConfigDescriptor_seen){
1452 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1453 d->predefined_SLConfigDescriptor_seen = 1;
1458 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1462 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1465 update_offsets(&d->pb, &off, &len);
1466 if (len < 0 || len1 > len || len1 <= 0) {
1467 av_log(d->s, AV_LOG_ERROR,
1468 "Tag %x length violation new length %d bytes remaining %d\n",
1470 return AVERROR_INVALIDDATA;
1473 if (d->level++ >= MAX_LEVEL) {
1474 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1475 ret = AVERROR_INVALIDDATA;
1479 if (target_tag && tag != target_tag) {
1480 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1482 ret = AVERROR_INVALIDDATA;
1488 ret = parse_MP4IODescrTag(d, off, len1);
1491 ret = parse_MP4ODescrTag(d, off, len1);
1494 ret = parse_MP4ESDescrTag(d, off, len1);
1496 case MP4DecConfigDescrTag:
1497 ret = parse_MP4DecConfigDescrTag(d, off, len1);
1500 ret = parse_MP4SLDescrTag(d, off, len1);
1507 avio_seek(&d->pb, off + len1, SEEK_SET);
1511 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1512 Mp4Descr *descr, int *descr_count, int max_descr_count)
1514 MP4DescrParseContext d;
1517 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1521 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1523 *descr_count = d.descr_count;
1527 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1528 Mp4Descr *descr, int *descr_count, int max_descr_count)
1530 MP4DescrParseContext d;
1533 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1537 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1539 *descr_count = d.descr_count;
1543 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1546 MpegTSContext *ts = filter->u.section_filter.opaque;
1547 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1549 const uint8_t *p, *p_end;
1551 int mp4_descr_count = 0;
1552 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1554 AVFormatContext *s = ts->stream;
1556 p_end = section + section_len - 4;
1558 if (parse_section_header(&h, &p, p_end) < 0)
1560 if (h.tid != M4OD_TID)
1562 if (skip_identical(&h, tssf))
1565 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1566 MAX_MP4_DESCR_COUNT);
1568 for (pid = 0; pid < NB_PID_MAX; pid++) {
1571 for (i = 0; i < mp4_descr_count; i++) {
1574 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1576 if (ts->pids[pid]->type != MPEGTS_PES) {
1577 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1580 pes = ts->pids[pid]->u.pes_filter.opaque;
1585 pes->sl = mp4_descr[i].sl;
1587 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1588 mp4_descr[i].dec_config_descr_len, 0,
1589 NULL, NULL, NULL, NULL);
1590 ff_mp4_read_dec_config_descr(s, st, &pb);
1591 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1592 st->codecpar->extradata_size > 0)
1593 st->need_parsing = 0;
1594 if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1595 st->codecpar->extradata_size > 0)
1596 st->need_parsing = 0;
1598 st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1599 st->internal->need_context_update = 1;
1602 for (i = 0; i < mp4_descr_count; i++)
1603 av_free(mp4_descr[i].dec_config_descr);
1606 static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1609 AVProgram *prg = NULL;
1610 MpegTSContext *ts = filter->u.section_filter.opaque;
1612 int idx = ff_find_stream_index(ts->stream, filter->pid);
1616 new_data_packet(section, section_len, ts->pkt);
1617 ts->pkt->stream_index = idx;
1618 prg = av_find_program_from_stream(ts->stream, NULL, idx);
1619 if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1620 MpegTSFilter *f = ts->pids[prg->pcr_pid];
1621 if (f && f->last_pcr != -1)
1622 ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1628 static const uint8_t opus_coupled_stream_cnt[9] = {
1629 1, 0, 1, 1, 2, 2, 2, 3, 3
1632 static const uint8_t opus_stream_cnt[9] = {
1633 1, 1, 1, 2, 2, 3, 4, 4, 5,
1636 static const uint8_t opus_channel_map[8][8] = {
1644 { 0,6,1,2,3,4,5,7 },
1647 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1648 const uint8_t **pp, const uint8_t *desc_list_end,
1649 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1652 const uint8_t *desc_end;
1653 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1657 desc_tag = get8(pp, desc_list_end);
1659 return AVERROR_INVALIDDATA;
1660 desc_len = get8(pp, desc_list_end);
1662 return AVERROR_INVALIDDATA;
1663 desc_end = *pp + desc_len;
1664 if (desc_end > desc_list_end)
1665 return AVERROR_INVALIDDATA;
1667 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1669 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1670 stream_type == STREAM_TYPE_PRIVATE_DATA)
1671 mpegts_find_stream_type(st, desc_tag, DESC_types);
1674 case 0x1E: /* SL descriptor */
1675 desc_es_id = get16(pp, desc_end);
1678 if (ts && ts->pids[pid])
1679 ts->pids[pid]->es_id = desc_es_id;
1680 for (i = 0; i < mp4_descr_count; i++)
1681 if (mp4_descr[i].dec_config_descr_len &&
1682 mp4_descr[i].es_id == desc_es_id) {
1684 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1685 mp4_descr[i].dec_config_descr_len, 0,
1686 NULL, NULL, NULL, NULL);
1687 ff_mp4_read_dec_config_descr(fc, st, &pb);
1688 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1689 st->codecpar->extradata_size > 0) {
1690 st->need_parsing = 0;
1691 st->internal->need_context_update = 1;
1693 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1694 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1697 case 0x1F: /* FMC descriptor */
1698 if (get16(pp, desc_end) < 0)
1700 if (mp4_descr_count > 0 &&
1701 (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1702 (st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1703 st->request_probe > 0) &&
1704 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1706 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1707 mp4_descr->dec_config_descr_len, 0,
1708 NULL, NULL, NULL, NULL);
1709 ff_mp4_read_dec_config_descr(fc, st, &pb);
1710 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1711 st->codecpar->extradata_size > 0) {
1712 st->request_probe = st->need_parsing = 0;
1713 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1714 st->internal->need_context_update = 1;
1718 case 0x56: /* DVB teletext descriptor */
1720 uint8_t *extradata = NULL;
1721 int language_count = desc_len / 5;
1723 if (desc_len > 0 && desc_len % 5 != 0)
1724 return AVERROR_INVALIDDATA;
1726 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 * 2)) {
1732 return AVERROR(ENOMEM);
1736 if (st->codecpar->extradata_size < language_count * 2)
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 memcpy(extradata, *pp, 2);
1753 language[i * 4 - 1] = 0;
1754 av_dict_set(&st->metadata, "language", language, 0);
1755 st->internal->need_context_update = 1;
1759 case 0x59: /* subtitling descriptor */
1761 /* 8 bytes per DVB subtitle substream data:
1762 * ISO_639_language_code (3 bytes),
1763 * subtitling_type (1 byte),
1764 * composition_page_id (2 bytes),
1765 * ancillary_page_id (2 bytes) */
1766 int language_count = desc_len / 8;
1768 if (desc_len > 0 && desc_len % 8 != 0)
1769 return AVERROR_INVALIDDATA;
1771 if (language_count > 1) {
1772 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1775 if (language_count > 0) {
1778 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1779 av_assert0(language_count <= sizeof(language) / 4);
1781 if (st->codecpar->extradata == NULL) {
1782 if (ff_alloc_extradata(st->codecpar, language_count * 5)) {
1783 return AVERROR(ENOMEM);
1787 if (st->codecpar->extradata_size < language_count * 5)
1788 return AVERROR_INVALIDDATA;
1790 extradata = st->codecpar->extradata;
1792 for (i = 0; i < language_count; i++) {
1793 language[i * 4 + 0] = get8(pp, desc_end);
1794 language[i * 4 + 1] = get8(pp, desc_end);
1795 language[i * 4 + 2] = get8(pp, desc_end);
1796 language[i * 4 + 3] = ',';
1798 /* hearing impaired subtitles detection using subtitling_type */
1800 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1801 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1802 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1803 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1804 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1805 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1806 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1810 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1811 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1817 language[i * 4 - 1] = 0;
1818 av_dict_set(&st->metadata, "language", language, 0);
1819 st->internal->need_context_update = 1;
1823 case 0x0a: /* ISO 639 language descriptor */
1824 for (i = 0; i + 4 <= desc_len; i += 4) {
1825 language[i + 0] = get8(pp, desc_end);
1826 language[i + 1] = get8(pp, desc_end);
1827 language[i + 2] = get8(pp, desc_end);
1828 language[i + 3] = ',';
1829 switch (get8(pp, desc_end)) {
1831 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1834 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1837 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1841 if (i && language[0]) {
1842 language[i - 1] = 0;
1843 /* don't overwrite language, as it may already have been set by
1844 * another, more specific descriptor (e.g. supplementary audio) */
1845 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
1848 case 0x05: /* registration descriptor */
1849 st->codecpar->codec_tag = bytestream_get_le32(pp);
1850 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1851 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) {
1852 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1853 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1854 st->request_probe = 50;
1857 case 0x52: /* stream identifier descriptor */
1858 st->stream_identifier = 1 + get8(pp, desc_end);
1860 case 0x26: /* metadata descriptor */
1861 if (get16(pp, desc_end) == 0xFFFF)
1863 if (get8(pp, desc_end) == 0xFF) {
1864 st->codecpar->codec_tag = bytestream_get_le32(pp);
1865 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
1866 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
1869 case 0x7f: /* DVB extension descriptor */
1870 ext_desc_tag = get8(pp, desc_end);
1871 if (ext_desc_tag < 0)
1872 return AVERROR_INVALIDDATA;
1873 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
1874 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1875 if (!st->codecpar->extradata) {
1876 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
1877 AV_INPUT_BUFFER_PADDING_SIZE);
1878 if (!st->codecpar->extradata)
1879 return AVERROR(ENOMEM);
1881 st->codecpar->extradata_size = sizeof(opus_default_extradata);
1882 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
1884 channel_config_code = get8(pp, desc_end);
1885 if (channel_config_code < 0)
1886 return AVERROR_INVALIDDATA;
1887 if (channel_config_code <= 0x8) {
1888 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1889 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
1890 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
1891 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1892 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
1894 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1896 st->need_parsing = AVSTREAM_PARSE_FULL;
1897 st->internal->need_context_update = 1;
1900 if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
1904 return AVERROR_INVALIDDATA;
1905 flags = get8(pp, desc_end);
1907 if ((flags & 0x80) == 0) /* mix_type */
1908 st->disposition |= AV_DISPOSITION_DEPENDENT;
1910 switch ((flags >> 2) & 0x1F) { /* editorial_classification */
1912 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1915 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1918 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1922 if (flags & 0x01) { /* language_code_present */
1924 return AVERROR_INVALIDDATA;
1925 language[0] = get8(pp, desc_end);
1926 language[1] = get8(pp, desc_end);
1927 language[2] = get8(pp, desc_end);
1930 /* This language always has to override a possible
1931 * ISO 639 language descriptor language */
1933 av_dict_set(&st->metadata, "language", language, 0);
1944 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
1946 return !(stream_type == 0x13 ||
1947 (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
1950 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1952 MpegTSContext *ts = filter->u.section_filter.opaque;
1953 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1954 SectionHeader h1, *h = &h1;
1957 const uint8_t *p, *p_end, *desc_list_end;
1958 int program_info_length, pcr_pid, pid, stream_type;
1960 uint32_t prog_reg_desc = 0; /* registration descriptor */
1962 int mp4_descr_count = 0;
1963 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1966 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
1967 hex_dump_debug(ts->stream, section, section_len);
1969 p_end = section + section_len - 4;
1971 if (parse_section_header(h, &p, p_end) < 0)
1973 if (skip_identical(h, tssf))
1976 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
1977 h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
1979 if (h->tid != PMT_TID)
1981 if (!ts->scan_all_pmts && ts->skip_changes)
1984 if (!ts->skip_clear)
1985 clear_program(ts, h->id);
1987 pcr_pid = get16(&p, p_end);
1991 add_pid_to_pmt(ts, h->id, pcr_pid);
1992 set_pcr_pid(ts->stream, h->id, pcr_pid);
1994 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
1996 program_info_length = get16(&p, p_end);
1997 if (program_info_length < 0)
1999 program_info_length &= 0xfff;
2000 while (program_info_length >= 2) {
2002 tag = get8(&p, p_end);
2003 len = get8(&p, p_end);
2005 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2007 if (len > program_info_length - 2)
2008 // something else is broken, exit the program_descriptors_loop
2010 program_info_length -= len + 2;
2011 if (tag == 0x1d) { // IOD descriptor
2012 get8(&p, p_end); // scope
2013 get8(&p, p_end); // label
2015 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2016 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2017 } else if (tag == 0x05 && len >= 4) { // registration descriptor
2018 prog_reg_desc = bytestream_get_le32(&p);
2023 p += program_info_length;
2027 // stop parsing after pmt, we found header
2028 if (!ts->stream->nb_streams)
2031 set_pmt_found(ts, h->id);
2037 stream_type = get8(&p, p_end);
2038 if (stream_type < 0)
2040 pid = get16(&p, p_end);
2044 if (pid == ts->current_pid)
2047 /* now create stream */
2048 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2049 pes = ts->pids[pid]->u.pes_filter.opaque;
2051 pes->st = avformat_new_stream(pes->stream, NULL);
2054 pes->st->id = pes->pid;
2057 } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2059 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2060 pes = add_pes_stream(ts, pid, pcr_pid);
2062 st = avformat_new_stream(pes->stream, NULL);
2068 int idx = ff_find_stream_index(ts->stream, pid);
2070 st = ts->stream->streams[idx];
2072 st = avformat_new_stream(ts->stream, NULL);
2076 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2077 if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2078 mpegts_find_stream_type(st, stream_type, SCTE_types);
2079 mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2087 if (pes && !pes->stream_type)
2088 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2090 add_pid_to_pmt(ts, h->id, pid);
2092 av_program_add_stream_index(ts->stream, h->id, st->index);
2094 desc_list_len = get16(&p, p_end);
2095 if (desc_list_len < 0)
2097 desc_list_len &= 0xfff;
2098 desc_list_end = p + desc_list_len;
2099 if (desc_list_end > p_end)
2102 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2103 desc_list_end, mp4_descr,
2104 mp4_descr_count, pid, ts) < 0)
2107 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2108 stream_type == 0x83 && pes->sub_st) {
2109 av_program_add_stream_index(ts->stream, h->id,
2110 pes->sub_st->index);
2111 pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2117 if (!ts->pids[pcr_pid])
2118 mpegts_open_pcr_filter(ts, pcr_pid);
2121 for (i = 0; i < mp4_descr_count; i++)
2122 av_free(mp4_descr[i].dec_config_descr);
2125 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2127 MpegTSContext *ts = filter->u.section_filter.opaque;
2128 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2129 SectionHeader h1, *h = &h1;
2130 const uint8_t *p, *p_end;
2134 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2135 hex_dump_debug(ts->stream, section, section_len);
2137 p_end = section + section_len - 4;
2139 if (parse_section_header(h, &p, p_end) < 0)
2141 if (h->tid != PAT_TID)
2143 if (ts->skip_changes)
2146 if (skip_identical(h, tssf))
2148 ts->stream->ts_id = h->id;
2152 sid = get16(&p, p_end);
2155 pmt_pid = get16(&p, p_end);
2160 if (pmt_pid == ts->current_pid)
2163 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2165 if (sid == 0x0000) {
2168 MpegTSFilter *fil = ts->pids[pmt_pid];
2169 program = av_new_program(ts->stream, sid);
2171 program->program_num = sid;
2172 program->pmt_pid = pmt_pid;
2175 if ( fil->type != MPEGTS_SECTION
2176 || fil->pid != pmt_pid
2177 || fil->u.section_filter.section_cb != pmt_cb)
2178 mpegts_close_filter(ts, ts->pids[pmt_pid]);
2180 if (!ts->pids[pmt_pid])
2181 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2182 add_pat_entry(ts, sid);
2183 add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2184 add_pid_to_pmt(ts, sid, pmt_pid);
2190 for (j=0; j<ts->stream->nb_programs; j++) {
2191 for (i = 0; i < ts->nb_prg; i++)
2192 if (ts->prg[i].id == ts->stream->programs[j]->id)
2194 if (i==ts->nb_prg && !ts->skip_clear)
2195 clear_avprogram(ts, ts->stream->programs[j]->id);
2200 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2202 MpegTSContext *ts = filter->u.section_filter.opaque;
2203 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2204 SectionHeader h1, *h = &h1;
2205 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2206 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2207 char *name, *provider_name;
2209 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2210 hex_dump_debug(ts->stream, section, section_len);
2212 p_end = section + section_len - 4;
2214 if (parse_section_header(h, &p, p_end) < 0)
2216 if (h->tid != SDT_TID)
2218 if (ts->skip_changes)
2220 if (skip_identical(h, tssf))
2223 onid = get16(&p, p_end);
2226 val = get8(&p, p_end);
2230 sid = get16(&p, p_end);
2233 val = get8(&p, p_end);
2236 desc_list_len = get16(&p, p_end);
2237 if (desc_list_len < 0)
2239 desc_list_len &= 0xfff;
2240 desc_list_end = p + desc_list_len;
2241 if (desc_list_end > p_end)
2244 desc_tag = get8(&p, desc_list_end);
2247 desc_len = get8(&p, desc_list_end);
2248 desc_end = p + desc_len;
2249 if (desc_len < 0 || desc_end > desc_list_end)
2252 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2253 desc_tag, desc_len);
2257 service_type = get8(&p, p_end);
2258 if (service_type < 0)
2260 provider_name = getstr8(&p, p_end);
2263 name = getstr8(&p, p_end);
2265 AVProgram *program = av_new_program(ts->stream, sid);
2267 av_dict_set(&program->metadata, "service_name", name, 0);
2268 av_dict_set(&program->metadata, "service_provider",
2273 av_free(provider_name);
2284 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2285 const uint8_t *packet);
2287 /* handle one TS packet */
2288 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2291 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2292 has_adaptation, has_payload;
2293 const uint8_t *p, *p_end;
2296 pid = AV_RB16(packet + 1) & 0x1fff;
2297 if (pid && discard_pid(ts, pid))
2299 is_start = packet[1] & 0x40;
2300 tss = ts->pids[pid];
2301 if (ts->auto_guess && !tss && is_start) {
2302 add_pes_stream(ts, pid, -1);
2303 tss = ts->pids[pid];
2307 ts->current_pid = pid;
2309 afc = (packet[3] >> 4) & 3;
2310 if (afc == 0) /* reserved value */
2312 has_adaptation = afc & 2;
2313 has_payload = afc & 1;
2314 is_discontinuity = has_adaptation &&
2315 packet[4] != 0 && /* with length > 0 */
2316 (packet[5] & 0x80); /* and discontinuity indicated */
2318 /* continuity check (currently not used) */
2319 cc = (packet[3] & 0xf);
2320 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2321 cc_ok = pid == 0x1FFF || // null packet PID
2328 av_log(ts->stream, AV_LOG_DEBUG,
2329 "Continuity check failed for pid %d expected %d got %d\n",
2330 pid, expected_cc, cc);
2331 if (tss->type == MPEGTS_PES) {
2332 PESContext *pc = tss->u.pes_filter.opaque;
2333 pc->flags |= AV_PKT_FLAG_CORRUPT;
2337 if (packet[1] & 0x80) {
2338 av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2339 if (tss->type == MPEGTS_PES) {
2340 PESContext *pc = tss->u.pes_filter.opaque;
2341 pc->flags |= AV_PKT_FLAG_CORRUPT;
2346 if (has_adaptation) {
2349 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2350 tss->last_pcr = pcr_h * 300 + pcr_l;
2351 /* skip adaptation field */
2354 /* if past the end of packet, ignore */
2355 p_end = packet + TS_PACKET_SIZE;
2356 if (p >= p_end || !has_payload)
2359 pos = avio_tell(ts->stream->pb);
2361 av_assert0(pos >= TS_PACKET_SIZE);
2362 ts->pos47_full = pos - TS_PACKET_SIZE;
2365 if (tss->type == MPEGTS_SECTION) {
2367 /* pointer field present */
2369 if (len > p_end - p)
2372 /* write remaining section bytes */
2373 write_section_data(ts, tss,
2375 /* check whether filter has been closed */
2381 write_section_data(ts, tss,
2386 write_section_data(ts, tss,
2391 // stop find_stream_info from waiting for more streams
2392 // when all programs have received a PMT
2393 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2395 for (i = 0; i < ts->nb_prg; i++) {
2396 if (!ts->prg[i].pmt_found)
2399 if (i == ts->nb_prg && ts->nb_prg > 0) {
2401 for (i = 0; i < ts->stream->nb_streams; i++) {
2402 AVStream *st = ts->stream->streams[i];
2403 if (st->codecpar->codec_type >= 0)
2404 types |= 1<<st->codecpar->codec_type;
2406 if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2407 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2408 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2415 // Note: The position here points actually behind the current packet.
2416 if (tss->type == MPEGTS_PES) {
2417 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2418 pos - ts->raw_packet_size)) < 0)
2426 static void reanalyze(MpegTSContext *ts) {
2427 AVIOContext *pb = ts->stream->pb;
2428 int64_t pos = avio_tell(pb);
2431 pos -= ts->pos47_full;
2432 if (pos == TS_PACKET_SIZE) {
2433 ts->size_stat[0] ++;
2434 } else if (pos == TS_DVHS_PACKET_SIZE) {
2435 ts->size_stat[1] ++;
2436 } else if (pos == TS_FEC_PACKET_SIZE) {
2437 ts->size_stat[2] ++;
2440 ts->size_stat_count ++;
2441 if (ts->size_stat_count > SIZE_STAT_THRESHOLD) {
2443 if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2444 newsize = TS_PACKET_SIZE;
2445 } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2446 newsize = TS_DVHS_PACKET_SIZE;
2447 } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2448 newsize = TS_FEC_PACKET_SIZE;
2450 if (newsize && newsize != ts->raw_packet_size) {
2451 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2452 ts->raw_packet_size = newsize;
2454 ts->size_stat_count = 0;
2455 memset(ts->size_stat, 0, sizeof(ts->size_stat));
2459 /* XXX: try to find a better synchro over several packets (use
2460 * get_packet_size() ?) */
2461 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2463 MpegTSContext *ts = s->priv_data;
2464 AVIOContext *pb = s->pb;
2466 uint64_t pos = avio_tell(pb);
2468 avio_seek(pb, -FFMIN(seekback, pos), SEEK_CUR);
2470 //Special case for files like 01c56b0dc1.ts
2471 if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2472 avio_seek(pb, 12, SEEK_CUR);
2476 for (i = 0; i < ts->resync_size; i++) {
2481 avio_seek(pb, -1, SEEK_CUR);
2482 reanalyze(s->priv_data);
2486 av_log(s, AV_LOG_ERROR,
2487 "max resync size reached, could not find sync byte\n");
2489 return AVERROR_INVALIDDATA;
2492 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2493 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2494 const uint8_t **data)
2496 AVIOContext *pb = s->pb;
2500 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2501 if (len != TS_PACKET_SIZE)
2502 return len < 0 ? len : AVERROR_EOF;
2503 /* check packet sync byte */
2504 if ((*data)[0] != 0x47) {
2505 /* find a new packet start */
2507 if (mpegts_resync(s, raw_packet_size, *data) < 0)
2508 return AVERROR(EAGAIN);
2518 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2520 AVIOContext *pb = s->pb;
2521 int skip = raw_packet_size - TS_PACKET_SIZE;
2523 avio_skip(pb, skip);
2526 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2528 AVFormatContext *s = ts->stream;
2529 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2530 const uint8_t *data;
2534 if (avio_tell(s->pb) != ts->last_pos) {
2536 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2537 /* seek detected, flush pes buffer */
2538 for (i = 0; i < NB_PID_MAX; i++) {
2540 if (ts->pids[i]->type == MPEGTS_PES) {
2541 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2542 av_buffer_unref(&pes->buffer);
2543 pes->data_index = 0;
2544 pes->state = MPEGTS_SKIP; /* skip until pes header */
2545 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2546 ts->pids[i]->u.section_filter.last_ver = -1;
2548 ts->pids[i]->last_cc = -1;
2549 ts->pids[i]->last_pcr = -1;
2556 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2559 if (nb_packets != 0 && packet_num >= nb_packets ||
2560 ts->stop_parse > 1) {
2561 ret = AVERROR(EAGAIN);
2564 if (ts->stop_parse > 0)
2567 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2570 ret = handle_packet(ts, data);
2571 finished_reading_packet(s, ts->raw_packet_size);
2575 ts->last_pos = avio_tell(s->pb);
2579 static int mpegts_probe(AVProbeData *p)
2581 const int size = p->buf_size;
2585 int check_count = size / TS_FEC_PACKET_SIZE;
2586 #define CHECK_COUNT 10
2587 #define CHECK_BLOCK 100
2592 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2593 int left = FFMIN(check_count - i, CHECK_BLOCK);
2594 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2595 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2596 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2597 score = FFMAX3(score, dvhs_score, fec_score);
2599 maxscore = FFMAX(maxscore, score);
2602 sumscore = sumscore * CHECK_COUNT / check_count;
2603 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2605 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2607 if (check_count > CHECK_COUNT && sumscore > 6) {
2608 return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2609 } else if (check_count >= CHECK_COUNT && sumscore > 6) {
2610 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2611 } else if (check_count >= CHECK_COUNT && maxscore > 6) {
2612 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2613 } else if (sumscore > 6) {
2620 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2621 * (-1) if not available */
2622 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2624 int afc, len, flags;
2628 afc = (packet[3] >> 4) & 3;
2630 return AVERROR_INVALIDDATA;
2635 return AVERROR_INVALIDDATA;
2638 if (!(flags & 0x10))
2639 return AVERROR_INVALIDDATA;
2641 return AVERROR_INVALIDDATA;
2643 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2644 *ppcr_low = ((p[4] & 1) << 8) | p[5];
2648 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2650 /* NOTE: We attempt to seek on non-seekable files as well, as the
2651 * probe buffer usually is big enough. Only warn if the seek failed
2652 * on files where the seek should work. */
2653 if (avio_seek(pb, pos, SEEK_SET) < 0)
2654 av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2657 static int mpegts_read_header(AVFormatContext *s)
2659 MpegTSContext *ts = s->priv_data;
2660 AVIOContext *pb = s->pb;
2661 uint8_t buf[8 * 1024] = {0};
2663 int64_t pos, probesize = s->probesize;
2665 s->internal->prefer_codec_framerate = 1;
2667 if (ffio_ensure_seekback(pb, probesize) < 0)
2668 av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2670 /* read the first 8192 bytes to get packet size */
2671 pos = avio_tell(pb);
2672 len = avio_read(pb, buf, sizeof(buf));
2673 ts->raw_packet_size = get_packet_size(buf, len);
2674 if (ts->raw_packet_size <= 0) {
2675 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2676 ts->raw_packet_size = TS_PACKET_SIZE;
2681 if (s->iformat == &ff_mpegts_demuxer) {
2684 /* first do a scan to get all the services */
2685 seek_back(s, pb, pos);
2687 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2689 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2691 handle_packets(ts, probesize / ts->raw_packet_size);
2692 /* if could not find service, enable auto_guess */
2696 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2698 s->ctx_flags |= AVFMTCTX_NOHEADER;
2701 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2702 int64_t pcrs[2], pcr_h;
2703 int packet_count[2];
2704 uint8_t packet[TS_PACKET_SIZE];
2705 const uint8_t *data;
2707 /* only read packets */
2709 st = avformat_new_stream(s, NULL);
2711 return AVERROR(ENOMEM);
2712 avpriv_set_pts_info(st, 60, 1, 27000000);
2713 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2714 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
2716 /* we iterate until we find two PCRs to estimate the bitrate */
2721 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2724 pid = AV_RB16(data + 1) & 0x1fff;
2725 if ((pcr_pid == -1 || pcr_pid == pid) &&
2726 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2727 finished_reading_packet(s, ts->raw_packet_size);
2729 packet_count[nb_pcrs] = nb_packets;
2730 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2733 if (pcrs[1] - pcrs[0] > 0) {
2734 /* the difference needs to be positive to make sense for bitrate computation */
2737 av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
2739 packet_count[0] = packet_count[1];
2744 finished_reading_packet(s, ts->raw_packet_size);
2749 /* NOTE1: the bitrate is computed without the FEC */
2750 /* NOTE2: it is only the bitrate of the start of the stream */
2751 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2752 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2753 s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
2754 st->codecpar->bit_rate = s->bit_rate;
2755 st->start_time = ts->cur_pcr;
2756 av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
2757 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2760 seek_back(s, pb, pos);
2764 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2766 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
2768 MpegTSContext *ts = s->priv_data;
2770 int64_t pcr_h, next_pcr_h, pos;
2771 int pcr_l, next_pcr_l;
2772 uint8_t pcr_buf[12];
2773 const uint8_t *data;
2775 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2776 return AVERROR(ENOMEM);
2777 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2778 pkt->pos = avio_tell(s->pb);
2780 av_packet_unref(pkt);
2783 if (data != pkt->data)
2784 memcpy(pkt->data, data, ts->raw_packet_size);
2785 finished_reading_packet(s, ts->raw_packet_size);
2786 if (ts->mpeg2ts_compute_pcr) {
2787 /* compute exact PCR for each packet */
2788 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2789 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2790 pos = avio_tell(s->pb);
2791 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
2792 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2793 avio_read(s->pb, pcr_buf, 12);
2794 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2795 /* XXX: not precise enough */
2797 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2802 avio_seek(s->pb, pos, SEEK_SET);
2803 /* no next PCR found: we use previous increment */
2804 ts->cur_pcr = pcr_h * 300 + pcr_l;
2806 pkt->pts = ts->cur_pcr;
2807 pkt->duration = ts->pcr_incr;
2808 ts->cur_pcr += ts->pcr_incr;
2810 pkt->stream_index = 0;
2814 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
2816 MpegTSContext *ts = s->priv_data;
2821 ret = handle_packets(ts, 0);
2823 av_packet_unref(ts->pkt);
2824 /* flush pes data left */
2825 for (i = 0; i < NB_PID_MAX; i++)
2826 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2827 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2828 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2829 ret = new_pes_packet(pes, pkt);
2832 pes->state = MPEGTS_SKIP;
2839 if (!ret && pkt->size < 0)
2840 ret = AVERROR_INVALIDDATA;
2844 static void mpegts_free(MpegTSContext *ts)
2850 for (i = 0; i < NB_PID_MAX; i++)
2852 mpegts_close_filter(ts, ts->pids[i]);
2855 static int mpegts_read_close(AVFormatContext *s)
2857 MpegTSContext *ts = s->priv_data;
2862 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2863 int64_t *ppos, int64_t pos_limit)
2865 MpegTSContext *ts = s->priv_data;
2866 int64_t pos, timestamp;
2867 uint8_t buf[TS_PACKET_SIZE];
2868 int pcr_l, pcr_pid =
2869 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
2870 int pos47 = ts->pos47_full % ts->raw_packet_size;
2872 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
2873 ts->raw_packet_size + pos47;
2874 while(pos < pos_limit) {
2875 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2876 return AV_NOPTS_VALUE;
2877 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2878 return AV_NOPTS_VALUE;
2879 if (buf[0] != 0x47) {
2880 if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
2881 return AV_NOPTS_VALUE;
2882 pos = avio_tell(s->pb);
2885 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2886 parse_pcr(×tamp, &pcr_l, buf) == 0) {
2890 pos += ts->raw_packet_size;
2893 return AV_NOPTS_VALUE;
2896 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2897 int64_t *ppos, int64_t pos_limit)
2899 MpegTSContext *ts = s->priv_data;
2901 int pos47 = ts->pos47_full % ts->raw_packet_size;
2902 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
2903 ff_read_frame_flush(s);
2904 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2905 return AV_NOPTS_VALUE;
2906 while(pos < pos_limit) {
2909 av_init_packet(&pkt);
2910 ret = av_read_frame(s, &pkt);
2912 return AV_NOPTS_VALUE;
2913 if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
2914 ff_reduce_index(s, pkt.stream_index);
2915 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
2916 if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
2917 int64_t dts = pkt.dts;
2919 av_packet_unref(&pkt);
2924 av_packet_unref(&pkt);
2927 return AV_NOPTS_VALUE;
2930 /**************************************************************/
2931 /* parsing functions - called from other demuxers such as RTP */
2933 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
2937 ts = av_mallocz(sizeof(MpegTSContext));
2940 /* no stream case, currently used by RTP */
2941 ts->raw_packet_size = TS_PACKET_SIZE;
2944 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2945 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2950 /* return the consumed length if a packet was output, or -1 if no
2951 * packet is output */
2952 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
2953 const uint8_t *buf, int len)
2961 if (len < TS_PACKET_SIZE)
2962 return AVERROR_INVALIDDATA;
2963 if (buf[0] != 0x47) {
2967 handle_packet(ts, buf);
2968 buf += TS_PACKET_SIZE;
2969 len -= TS_PACKET_SIZE;
2970 if (ts->stop_parse == 1)
2977 void avpriv_mpegts_parse_close(MpegTSContext *ts)
2983 AVInputFormat ff_mpegts_demuxer = {
2985 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2986 .priv_data_size = sizeof(MpegTSContext),
2987 .read_probe = mpegts_probe,
2988 .read_header = mpegts_read_header,
2989 .read_packet = mpegts_read_packet,
2990 .read_close = mpegts_read_close,
2991 .read_timestamp = mpegts_get_dts,
2992 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2993 .priv_class = &mpegts_class,
2996 AVInputFormat ff_mpegtsraw_demuxer = {
2997 .name = "mpegtsraw",
2998 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
2999 .priv_data_size = sizeof(MpegTSContext),
3000 .read_header = mpegts_read_header,
3001 .read_packet = mpegts_raw_read_packet,
3002 .read_close = mpegts_read_close,
3003 .read_timestamp = mpegts_get_dts,
3004 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3005 .priv_class = &mpegtsraw_class,