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"
44 /* maximum size in which we look for synchronization if
45 * synchronization is lost */
46 #define MAX_RESYNC_SIZE 65536
48 #define MAX_PES_PAYLOAD 200 * 1024
50 #define MAX_MP4_DESCR_COUNT 16
52 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
54 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
55 (modulus) = (dividend) % (divisor); \
56 (prev_dividend) = (dividend); \
59 enum MpegTSFilterType {
65 typedef struct MpegTSFilter MpegTSFilter;
67 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
68 int is_start, int64_t pos);
70 typedef struct MpegTSPESFilter {
75 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
77 typedef void SetServiceCallback (void *opaque, int ret);
79 typedef struct MpegTSSectionFilter {
86 unsigned int check_crc : 1;
87 unsigned int end_of_section_reached : 1;
88 SectionCallback *section_cb;
90 } MpegTSSectionFilter;
95 int last_cc; /* last cc code (-1 if first packet) */
98 enum MpegTSFilterType type;
100 MpegTSPESFilter pes_filter;
101 MpegTSSectionFilter section_filter;
105 #define MAX_PIDS_PER_PROGRAM 64
107 unsigned int id; // program id/service id
108 unsigned int nb_pids;
109 unsigned int pids[MAX_PIDS_PER_PROGRAM];
111 /** have we found pmt for this program */
115 struct MpegTSContext {
116 const AVClass *class;
118 AVFormatContext *stream;
119 /** raw packet size, including FEC if present */
124 #define SIZE_STAT_THRESHOLD 10
128 /** if true, all pids are analyzed to find streams */
131 /** compute exact PCR for each transport stream packet */
132 int mpeg2ts_compute_pcr;
134 /** fix dvb teletext pts */
135 int fix_teletext_pts;
137 int64_t cur_pcr; /**< used to estimate the exact PCR */
138 int pcr_incr; /**< used to estimate the exact PCR */
140 /* data needed to handle file based ts */
141 /** stop parsing loop */
143 /** packet containing Audio/Video data */
145 /** to detect seek */
150 int skip_unknown_pmt;
155 int merge_pmt_versions;
157 /******************************************/
158 /* private mpegts data */
160 /** structure to keep track of Program->pids mapping */
164 int8_t crc_validity[NB_PID_MAX];
165 /** filters for various streams specified by PMT + for the PAT and PMT */
166 MpegTSFilter *pids[NB_PID_MAX];
170 #define MPEGTS_OPTIONS \
171 { "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 }
173 static const AVOption options[] = {
175 {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
176 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
177 {"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
178 {.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
179 {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
180 {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
181 {"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
182 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
183 {"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
184 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
185 {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
186 {.i64 = 0}, 0, 1, 0 },
187 {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
188 {.i64 = 0}, 0, 1, 0 },
192 static const AVClass mpegts_class = {
193 .class_name = "mpegts demuxer",
194 .item_name = av_default_item_name,
196 .version = LIBAVUTIL_VERSION_INT,
199 static const AVOption raw_options[] = {
201 { "compute_pcr", "compute exact PCR for each transport stream packet",
202 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
203 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
204 { "ts_packetsize", "output option carrying the raw packet size",
205 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
207 AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
211 static const AVClass mpegtsraw_class = {
212 .class_name = "mpegtsraw demuxer",
213 .item_name = av_default_item_name,
214 .option = raw_options,
215 .version = LIBAVUTIL_VERSION_INT,
218 /* TS stream handling */
223 MPEGTS_PESHEADER_FILL,
228 /* enough for PES header + length */
229 #define PES_START_SIZE 6
230 #define PES_HEADER_SIZE 9
231 #define MAX_PES_HEADER_SIZE (9 + 255)
233 typedef struct PESContext {
235 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
238 AVFormatContext *stream;
240 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
241 enum MpegTSState state;
242 /* used to get the format */
244 int flags; /**< copied to the AVPacket flags */
247 int extended_stream_id;
250 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
251 uint8_t header[MAX_PES_HEADER_SIZE];
257 extern AVInputFormat ff_mpegts_demuxer;
259 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
262 for (i = 0; i < ts->nb_prg; i++) {
263 if (ts->prg[i].id == programid) {
270 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
272 AVProgram *prg = NULL;
275 for (i = 0; i < ts->stream->nb_programs; i++)
276 if (ts->stream->programs[i]->id == programid) {
277 prg = ts->stream->programs[i];
282 prg->nb_stream_indexes = 0;
285 static void clear_program(MpegTSContext *ts, unsigned int programid)
289 clear_avprogram(ts, programid);
290 for (i = 0; i < ts->nb_prg; i++)
291 if (ts->prg[i].id == programid) {
292 ts->prg[i].nb_pids = 0;
293 ts->prg[i].pmt_found = 0;
297 static void clear_programs(MpegTSContext *ts)
303 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
306 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
310 p = &ts->prg[ts->nb_prg];
317 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
320 struct Program *p = get_program(ts, programid);
325 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
328 for (i = 0; i < p->nb_pids; i++)
329 if (p->pids[i] == pid)
332 p->pids[p->nb_pids++] = pid;
335 static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
337 struct Program *p = get_program(ts, programid);
344 static void update_av_program_info(AVFormatContext *s, unsigned int programid,
345 unsigned int pid, int version)
348 for (i = 0; i < s->nb_programs; i++) {
349 AVProgram *program = s->programs[i];
350 if (program->id == programid) {
351 int old_pcr_pid = program->pcr_pid,
352 old_version = program->pmt_version;
353 program->pcr_pid = pid;
354 program->pmt_version = version;
356 if (old_version != -1 && old_version != version) {
357 av_log(s, AV_LOG_VERBOSE,
358 "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
359 programid, old_version, version, old_pcr_pid, pid);
367 * @brief discard_pid() decides if the pid is to be discarded according
368 * to caller's programs selection
369 * @param ts : - TS context
371 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
374 static int discard_pid(MpegTSContext *ts, unsigned int pid)
377 int used = 0, discarded = 0;
380 /* If none of the programs have .discard=AVDISCARD_ALL then there's
381 * no way we have to discard this packet */
382 for (k = 0; k < ts->stream->nb_programs; k++)
383 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
385 if (k == ts->stream->nb_programs)
388 for (i = 0; i < ts->nb_prg; i++) {
390 for (j = 0; j < p->nb_pids; j++) {
391 if (p->pids[j] != pid)
393 // is program with id p->id set to be discarded?
394 for (k = 0; k < ts->stream->nb_programs; k++) {
395 if (ts->stream->programs[k]->id == p->id) {
396 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
405 return !used && discarded;
409 * Assemble PES packets out of TS packets, and then call the "section_cb"
410 * function when they are complete.
412 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
413 const uint8_t *buf, int buf_size, int is_start)
415 MpegTSSectionFilter *tss = &tss1->u.section_filter;
416 uint8_t *cur_section_buf = NULL;
420 memcpy(tss->section_buf, buf, buf_size);
421 tss->section_index = buf_size;
422 tss->section_h_size = -1;
423 tss->end_of_section_reached = 0;
425 if (tss->end_of_section_reached)
427 len = MAX_SECTION_SIZE - tss->section_index;
430 memcpy(tss->section_buf + tss->section_index, buf, len);
431 tss->section_index += len;
435 cur_section_buf = tss->section_buf;
436 while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
437 /* compute section length if possible */
438 if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
439 len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
440 if (len > MAX_SECTION_SIZE)
442 tss->section_h_size = len;
445 if (tss->section_h_size != -1 &&
446 tss->section_index >= offset + tss->section_h_size) {
448 tss->end_of_section_reached = 1;
450 if (tss->check_crc) {
451 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
452 if (tss->section_h_size >= 4)
453 tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
456 ts->crc_validity[ tss1->pid ] = 100;
457 }else if (ts->crc_validity[ tss1->pid ] > -10) {
458 ts->crc_validity[ tss1->pid ]--;
463 tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
468 cur_section_buf += tss->section_h_size;
469 offset += tss->section_h_size;
470 tss->section_h_size = -1;
472 tss->section_h_size = -1;
473 tss->end_of_section_reached = 0;
479 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
480 enum MpegTSFilterType type)
482 MpegTSFilter *filter;
484 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
486 if (pid >= NB_PID_MAX || ts->pids[pid])
488 filter = av_mallocz(sizeof(MpegTSFilter));
491 ts->pids[pid] = filter;
496 filter->last_cc = -1;
497 filter->last_pcr= -1;
502 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
504 SectionCallback *section_cb,
508 MpegTSFilter *filter;
509 MpegTSSectionFilter *sec;
511 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
513 sec = &filter->u.section_filter;
514 sec->section_cb = section_cb;
515 sec->opaque = opaque;
516 sec->section_buf = av_mallocz(MAX_SECTION_SIZE);
517 sec->check_crc = check_crc;
520 if (!sec->section_buf) {
527 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
531 MpegTSFilter *filter;
532 MpegTSPESFilter *pes;
534 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
537 pes = &filter->u.pes_filter;
538 pes->pes_cb = pes_cb;
539 pes->opaque = opaque;
543 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
545 return mpegts_open_filter(ts, pid, MPEGTS_PCR);
548 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
553 if (filter->type == MPEGTS_SECTION)
554 av_freep(&filter->u.section_filter.section_buf);
555 else if (filter->type == MPEGTS_PES) {
556 PESContext *pes = filter->u.pes_filter.opaque;
557 av_buffer_unref(&pes->buffer);
558 /* referenced private data will be freed later in
559 * avformat_close_input (pes->st->priv_data == pes) */
560 if (!pes->st || pes->merged_st) {
561 av_freep(&filter->u.pes_filter.opaque);
566 ts->pids[pid] = NULL;
569 static int analyze(const uint8_t *buf, int size, int packet_size,
572 int stat[TS_MAX_PACKET_SIZE];
577 memset(stat, 0, packet_size * sizeof(*stat));
579 for (i = 0; i < size - 3; i++) {
580 if (buf[i] == 0x47) {
581 int pid = AV_RB16(buf+1) & 0x1FFF;
582 int asc = buf[i + 3] & 0x30;
583 if (!probe || pid == 0x1FFF || asc) {
584 int x = i % packet_size;
587 if (stat[x] > best_score) {
588 best_score = stat[x];
594 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
597 /* autodetect fec presence. Must have at least 1024 bytes */
598 static int get_packet_size(const uint8_t *buf, int size)
600 int score, fec_score, dvhs_score;
602 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
603 return AVERROR_INVALIDDATA;
605 score = analyze(buf, size, TS_PACKET_SIZE, 0);
606 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, 0);
607 fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, 0);
608 av_log(NULL, AV_LOG_TRACE, "score: %d, dvhs_score: %d, fec_score: %d \n",
609 score, dvhs_score, fec_score);
611 if (score > fec_score && score > dvhs_score)
612 return TS_PACKET_SIZE;
613 else if (dvhs_score > score && dvhs_score > fec_score)
614 return TS_DVHS_PACKET_SIZE;
615 else if (score < fec_score && dvhs_score < fec_score)
616 return TS_FEC_PACKET_SIZE;
618 return AVERROR_INVALIDDATA;
621 typedef struct SectionHeader {
626 uint8_t last_sec_num;
629 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
631 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
634 tssf->last_ver = h->version;
635 tssf->last_crc = tssf->crc;
640 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
647 return AVERROR_INVALIDDATA;
653 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
660 return AVERROR_INVALIDDATA;
667 /* read and allocate a DVB string preceded by its length */
668 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
675 len = get8(&p, p_end);
681 if (len && *p < 0x20) {
682 const char *encodings[] = {
683 "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
684 "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
685 "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
686 "", "ISO-10646", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
687 "", "", "", "", "", "", "", ""
691 size_t inlen = len - 1, outlen = inlen * 6 + 1;
692 if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
694 snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
697 cd = iconv_open("UTF-8", iso8859);
700 cd = iconv_open("UTF-8", encodings[*p]);
702 if (cd == (iconv_t)-1)
704 str = out = av_malloc(outlen);
709 if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
721 str = av_malloc(len + 1);
731 static int parse_section_header(SectionHeader *h,
732 const uint8_t **pp, const uint8_t *p_end)
736 val = get8(pp, p_end);
741 val = get16(pp, p_end);
745 val = get8(pp, p_end);
748 h->version = (val >> 1) & 0x1f;
749 val = get8(pp, p_end);
753 val = get8(pp, p_end);
756 h->last_sec_num = val;
760 typedef struct StreamType {
761 uint32_t stream_type;
762 enum AVMediaType codec_type;
763 enum AVCodecID codec_id;
766 static const StreamType ISO_types[] = {
767 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
768 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
769 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
770 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
771 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
772 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
773 /* Makito encoder sets stream type 0x11 for AAC,
774 * so auto-detect LOAS/LATM instead of hardcoding it. */
775 #if !CONFIG_LOAS_DEMUXER
776 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
778 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
779 { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
780 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
781 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
782 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
783 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
784 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
785 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
789 static const StreamType HDMV_types[] = {
790 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
791 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
792 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
793 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
794 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
795 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
796 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
797 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
798 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
799 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
800 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
805 static const StreamType SCTE_types[] = {
806 { 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
811 static const StreamType MISC_types[] = {
812 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
813 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
817 static const StreamType REGD_types[] = {
818 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
819 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
820 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
821 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
822 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
823 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
824 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
825 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
826 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
827 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
828 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
829 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
833 static const StreamType METADATA_types[] = {
834 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
835 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
839 /* descriptor present */
840 static const StreamType DESC_types[] = {
841 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
842 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
843 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
844 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
845 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
849 static void mpegts_find_stream_type(AVStream *st,
850 uint32_t stream_type,
851 const StreamType *types)
853 for (; types->stream_type; types++)
854 if (stream_type == types->stream_type) {
855 if (st->codecpar->codec_type != types->codec_type ||
856 st->codecpar->codec_id != types->codec_id) {
857 st->codecpar->codec_type = types->codec_type;
858 st->codecpar->codec_id = types->codec_id;
859 st->internal->need_context_update = 1;
861 st->request_probe = 0;
866 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
867 uint32_t stream_type, uint32_t prog_reg_desc)
869 int old_codec_type = st->codecpar->codec_type;
870 int old_codec_id = st->codecpar->codec_id;
871 int old_codec_tag = st->codecpar->codec_tag;
873 if (avcodec_is_open(st->internal->avctx)) {
874 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
878 avpriv_set_pts_info(st, 33, 1, 90000);
880 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
881 st->codecpar->codec_id = AV_CODEC_ID_NONE;
882 st->need_parsing = AVSTREAM_PARSE_FULL;
884 pes->stream_type = stream_type;
886 av_log(pes->stream, AV_LOG_DEBUG,
887 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
888 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
890 st->codecpar->codec_tag = pes->stream_type;
892 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
893 if (pes->stream_type == 4 || pes->stream_type == 0x0f)
894 st->request_probe = 50;
895 if ((prog_reg_desc == AV_RL32("HDMV") ||
896 prog_reg_desc == AV_RL32("HDPR")) &&
897 st->codecpar->codec_id == AV_CODEC_ID_NONE) {
898 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
899 if (pes->stream_type == 0x83) {
900 // HDMV TrueHD streams also contain an AC3 coded version of the
901 // audio track - add a second stream for this
903 // priv_data cannot be shared between streams
904 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
906 return AVERROR(ENOMEM);
907 memcpy(sub_pes, pes, sizeof(*sub_pes));
909 sub_st = avformat_new_stream(pes->stream, NULL);
912 return AVERROR(ENOMEM);
915 sub_st->id = pes->pid;
916 avpriv_set_pts_info(sub_st, 33, 1, 90000);
917 sub_st->priv_data = sub_pes;
918 sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
919 sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
920 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
921 sub_pes->sub_st = pes->sub_st = sub_st;
924 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
925 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
926 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
927 st->codecpar->codec_id = old_codec_id;
928 st->codecpar->codec_type = old_codec_type;
930 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
931 (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
932 st->probe_packets > 0 &&
933 stream_type == STREAM_TYPE_PRIVATE_DATA) {
934 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
935 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
936 st->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
939 /* queue a context update if properties changed */
940 if (old_codec_type != st->codecpar->codec_type ||
941 old_codec_id != st->codecpar->codec_id ||
942 old_codec_tag != st->codecpar->codec_tag)
943 st->internal->need_context_update = 1;
948 static void reset_pes_packet_state(PESContext *pes)
950 pes->pts = AV_NOPTS_VALUE;
951 pes->dts = AV_NOPTS_VALUE;
954 av_buffer_unref(&pes->buffer);
957 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
960 pkt->data = (uint8_t *)buffer;
964 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
970 pkt->buf = pes->buffer;
971 pkt->data = pes->buffer->data;
972 pkt->size = pes->data_index;
974 if (pes->total_size != MAX_PES_PAYLOAD &&
975 pes->pes_header_size + pes->data_index != pes->total_size +
977 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
978 pes->flags |= AV_PKT_FLAG_CORRUPT;
980 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
982 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
983 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
984 pkt->stream_index = pes->sub_st->index;
986 pkt->stream_index = pes->st->index;
989 /* store position of first TS packet of this PES packet */
990 pkt->pos = pes->ts_packet_pos;
991 pkt->flags = pes->flags;
994 reset_pes_packet_state(pes);
996 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
998 return AVERROR(ENOMEM);
999 *sd = pes->stream_id;
1004 static uint64_t get_ts64(GetBitContext *gb, int bits)
1006 if (get_bits_left(gb) < bits)
1007 return AV_NOPTS_VALUE;
1008 return get_bits64(gb, bits);
1011 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
1012 const uint8_t *buf, int buf_size)
1015 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1016 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1017 int dts_flag = -1, cts_flag = -1;
1018 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1019 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1020 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1022 memcpy(buf_padded, buf, buf_padded_size);
1024 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1026 if (sl->use_au_start)
1027 au_start_flag = get_bits1(&gb);
1029 au_end_flag = get_bits1(&gb);
1030 if (!sl->use_au_start && !sl->use_au_end)
1031 au_start_flag = au_end_flag = 1;
1032 if (sl->ocr_len > 0)
1033 ocr_flag = get_bits1(&gb);
1035 idle_flag = get_bits1(&gb);
1036 if (sl->use_padding)
1037 padding_flag = get_bits1(&gb);
1039 padding_bits = get_bits(&gb, 3);
1041 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1042 if (sl->packet_seq_num_len)
1043 skip_bits_long(&gb, sl->packet_seq_num_len);
1044 if (sl->degr_prior_len)
1046 skip_bits(&gb, sl->degr_prior_len);
1048 skip_bits_long(&gb, sl->ocr_len);
1049 if (au_start_flag) {
1050 if (sl->use_rand_acc_pt)
1052 if (sl->au_seq_num_len > 0)
1053 skip_bits_long(&gb, sl->au_seq_num_len);
1054 if (sl->use_timestamps) {
1055 dts_flag = get_bits1(&gb);
1056 cts_flag = get_bits1(&gb);
1059 if (sl->inst_bitrate_len)
1060 inst_bitrate_flag = get_bits1(&gb);
1062 dts = get_ts64(&gb, sl->timestamp_len);
1064 cts = get_ts64(&gb, sl->timestamp_len);
1066 skip_bits_long(&gb, sl->au_len);
1067 if (inst_bitrate_flag)
1068 skip_bits_long(&gb, sl->inst_bitrate_len);
1071 if (dts != AV_NOPTS_VALUE)
1073 if (cts != AV_NOPTS_VALUE)
1076 if (sl->timestamp_len && sl->timestamp_res)
1077 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1079 return (get_bits_count(&gb) + 7) >> 3;
1082 /* return non zero if a packet could be constructed */
1083 static int mpegts_push_data(MpegTSFilter *filter,
1084 const uint8_t *buf, int buf_size, int is_start,
1087 PESContext *pes = filter->u.pes_filter.opaque;
1088 MpegTSContext *ts = pes->ts;
1096 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1097 ret = new_pes_packet(pes, ts->pkt);
1102 reset_pes_packet_state(pes);
1104 pes->state = MPEGTS_HEADER;
1105 pes->ts_packet_pos = pos;
1108 while (buf_size > 0) {
1109 switch (pes->state) {
1111 len = PES_START_SIZE - pes->data_index;
1114 memcpy(pes->header + pes->data_index, p, len);
1115 pes->data_index += len;
1118 if (pes->data_index == PES_START_SIZE) {
1119 /* we got all the PES or section header. We can now
1121 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1122 pes->header[2] == 0x01) {
1123 /* it must be an MPEG-2 PES stream */
1124 code = pes->header[3] | 0x100;
1125 av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1127 pes->stream_id = pes->header[3];
1129 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1131 pes->sub_st->discard == AVDISCARD_ALL)) ||
1132 code == 0x1be) /* padding_stream */
1135 /* stream not present in PMT */
1137 if (ts->skip_changes)
1139 if (ts->merge_pmt_versions)
1140 goto skip; /* wait for PMT to merge new stream */
1142 pes->st = avformat_new_stream(ts->stream, NULL);
1144 return AVERROR(ENOMEM);
1145 pes->st->id = pes->pid;
1146 mpegts_set_stream_info(pes->st, pes, 0, 0);
1149 pes->total_size = AV_RB16(pes->header + 4);
1150 /* NOTE: a zero total size means the PES size is
1152 if (!pes->total_size)
1153 pes->total_size = MAX_PES_PAYLOAD;
1155 /* allocate pes buffer */
1156 pes->buffer = av_buffer_alloc(pes->total_size +
1157 AV_INPUT_BUFFER_PADDING_SIZE);
1159 return AVERROR(ENOMEM);
1161 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1162 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1163 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1164 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1165 pes->state = MPEGTS_PESHEADER;
1166 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1167 av_log(pes->stream, AV_LOG_TRACE,
1168 "pid=%x stream_type=%x probing\n",
1171 pes->st->request_probe = 1;
1174 pes->pes_header_size = 6;
1175 pes->state = MPEGTS_PAYLOAD;
1176 pes->data_index = 0;
1179 /* otherwise, it should be a table */
1182 pes->state = MPEGTS_SKIP;
1187 /**********************************************/
1188 /* PES packing parsing */
1189 case MPEGTS_PESHEADER:
1190 len = PES_HEADER_SIZE - pes->data_index;
1192 return AVERROR_INVALIDDATA;
1195 memcpy(pes->header + pes->data_index, p, len);
1196 pes->data_index += len;
1199 if (pes->data_index == PES_HEADER_SIZE) {
1200 pes->pes_header_size = pes->header[8] + 9;
1201 pes->state = MPEGTS_PESHEADER_FILL;
1204 case MPEGTS_PESHEADER_FILL:
1205 len = pes->pes_header_size - pes->data_index;
1207 return AVERROR_INVALIDDATA;
1210 memcpy(pes->header + pes->data_index, p, len);
1211 pes->data_index += len;
1214 if (pes->data_index == pes->pes_header_size) {
1216 unsigned int flags, pes_ext, skip;
1218 flags = pes->header[7];
1219 r = pes->header + 9;
1220 pes->pts = AV_NOPTS_VALUE;
1221 pes->dts = AV_NOPTS_VALUE;
1222 if ((flags & 0xc0) == 0x80) {
1223 pes->dts = pes->pts = ff_parse_pes_pts(r);
1225 } else if ((flags & 0xc0) == 0xc0) {
1226 pes->pts = ff_parse_pes_pts(r);
1228 pes->dts = ff_parse_pes_pts(r);
1231 pes->extended_stream_id = -1;
1232 if (flags & 0x01) { /* PES extension */
1234 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1235 skip = (pes_ext >> 4) & 0xb;
1238 if ((pes_ext & 0x41) == 0x01 &&
1239 (r + 2) <= (pes->header + pes->pes_header_size)) {
1240 /* PES extension 2 */
1241 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1242 pes->extended_stream_id = r[1];
1246 /* we got the full header. We parse it and get the payload */
1247 pes->state = MPEGTS_PAYLOAD;
1248 pes->data_index = 0;
1249 if (pes->stream_type == 0x12 && buf_size > 0) {
1250 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1252 pes->pes_header_size += sl_header_bytes;
1253 p += sl_header_bytes;
1254 buf_size -= sl_header_bytes;
1256 if (pes->stream_type == 0x15 && buf_size >= 5) {
1257 /* skip metadata access unit header */
1258 pes->pes_header_size += 5;
1262 if ( pes->ts->fix_teletext_pts
1263 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1264 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1266 AVProgram *p = NULL;
1268 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1269 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1270 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1272 AVStream *st = NULL;
1273 if (f->type == MPEGTS_PES) {
1274 PESContext *pcrpes = f->u.pes_filter.opaque;
1277 } else if (f->type == MPEGTS_PCR) {
1279 for (i = 0; i < p->nb_stream_indexes; i++) {
1280 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1281 if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1285 if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1286 // teletext packets do not always have correct timestamps,
1287 // the standard says they should be handled after 40.6 ms at most,
1288 // and the pcr error to this packet should be no more than 100 ms.
1289 // TODO: we should interpolate the PCR, not just use the last one
1290 int64_t pcr = f->last_pcr / 300;
1292 pes->st->pts_wrap_reference = st->pts_wrap_reference;
1293 pes->st->pts_wrap_behavior = st->pts_wrap_behavior;
1294 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1295 pes->pts = pes->dts = pcr;
1296 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1297 pes->dts > pcr + 3654 + 9000) {
1298 pes->pts = pes->dts = pcr + 3654 + 9000;
1299 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1300 pes->dts > pcr + 10*90000) { //10sec
1301 pes->pts = pes->dts = pcr + 3654 + 9000;
1310 av_log(pes->stream, AV_LOG_VERBOSE,
1311 "Forcing DTS/PTS to be unset for a "
1312 "non-trustworthy PES packet for PID %d as "
1313 "PCR hasn't been received yet.\n",
1315 pes->dts = pes->pts = AV_NOPTS_VALUE;
1320 case MPEGTS_PAYLOAD:
1322 if (pes->data_index > 0 &&
1323 pes->data_index + buf_size > pes->total_size) {
1324 ret = new_pes_packet(pes, ts->pkt);
1327 pes->total_size = MAX_PES_PAYLOAD;
1328 pes->buffer = av_buffer_alloc(pes->total_size +
1329 AV_INPUT_BUFFER_PADDING_SIZE);
1331 return AVERROR(ENOMEM);
1333 } else if (pes->data_index == 0 &&
1334 buf_size > pes->total_size) {
1335 // pes packet size is < ts size packet and pes data is padded with 0xff
1336 // not sure if this is legal in ts but see issue #2392
1337 buf_size = pes->total_size;
1339 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1340 pes->data_index += buf_size;
1341 /* emit complete packets with known packet size
1342 * decreases demuxer delay for infrequent packets like subtitles from
1343 * a couple of seconds to milliseconds for properly muxed files.
1344 * total_size is the number of bytes following pes_packet_length
1345 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1346 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1347 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1349 ret = new_pes_packet(pes, ts->pkt);
1365 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1370 /* if no pid found, then add a pid context */
1371 pes = av_mallocz(sizeof(PESContext));
1375 pes->stream = ts->stream;
1377 pes->pcr_pid = pcr_pid;
1378 pes->state = MPEGTS_SKIP;
1379 pes->pts = AV_NOPTS_VALUE;
1380 pes->dts = AV_NOPTS_VALUE;
1381 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1390 typedef struct MP4DescrParseContext {
1394 Mp4Descr *active_descr;
1396 int max_descr_count;
1398 int predefined_SLConfigDescriptor_seen;
1399 } MP4DescrParseContext;
1401 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1402 const uint8_t *buf, unsigned size,
1403 Mp4Descr *descr, int max_descr_count)
1406 if (size > (1 << 30))
1407 return AVERROR_INVALIDDATA;
1409 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1410 NULL, NULL, NULL, NULL)) < 0)
1417 d->active_descr = NULL;
1418 d->max_descr_count = max_descr_count;
1423 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1425 int64_t new_off = avio_tell(pb);
1426 (*len) -= new_off - *off;
1430 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1433 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1436 int ret = parse_mp4_descr(d, off, len, 0);
1439 update_offsets(&d->pb, &off, &len);
1444 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1446 avio_rb16(&d->pb); // ID
1452 update_offsets(&d->pb, &off, &len);
1453 return parse_mp4_descr_arr(d, off, len);
1456 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1461 id_flags = avio_rb16(&d->pb);
1462 if (!(id_flags & 0x0020)) { // URL_Flag
1463 update_offsets(&d->pb, &off, &len);
1464 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1470 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1475 if (d->descr_count >= d->max_descr_count)
1476 return AVERROR_INVALIDDATA;
1477 ff_mp4_parse_es_descr(&d->pb, &es_id);
1478 d->active_descr = d->descr + (d->descr_count++);
1480 d->active_descr->es_id = es_id;
1481 update_offsets(&d->pb, &off, &len);
1482 if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1484 update_offsets(&d->pb, &off, &len);
1486 ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1487 d->active_descr = NULL;
1491 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1494 Mp4Descr *descr = d->active_descr;
1496 return AVERROR_INVALIDDATA;
1497 d->active_descr->dec_config_descr = av_malloc(len);
1498 if (!descr->dec_config_descr)
1499 return AVERROR(ENOMEM);
1500 descr->dec_config_descr_len = len;
1501 avio_read(&d->pb, descr->dec_config_descr, len);
1505 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1507 Mp4Descr *descr = d->active_descr;
1510 return AVERROR_INVALIDDATA;
1512 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1513 descr->sl.dst = avio_r8(&d->pb); \
1514 if (descr->sl.dst > maxv) { \
1515 descr->sl.dst = maxv; \
1516 return AVERROR_INVALIDDATA; \
1520 predefined = avio_r8(&d->pb);
1523 int flags = avio_r8(&d->pb);
1524 descr->sl.use_au_start = !!(flags & 0x80);
1525 descr->sl.use_au_end = !!(flags & 0x40);
1526 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1527 descr->sl.use_padding = !!(flags & 0x08);
1528 descr->sl.use_timestamps = !!(flags & 0x04);
1529 descr->sl.use_idle = !!(flags & 0x02);
1530 descr->sl.timestamp_res = avio_rb32(&d->pb);
1532 R8_CHECK_CLIP_MAX(timestamp_len, 63);
1533 R8_CHECK_CLIP_MAX(ocr_len, 63);
1534 R8_CHECK_CLIP_MAX(au_len, 31);
1535 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1536 lengths = avio_rb16(&d->pb);
1537 descr->sl.degr_prior_len = lengths >> 12;
1538 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1539 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1540 } else if (!d->predefined_SLConfigDescriptor_seen){
1541 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1542 d->predefined_SLConfigDescriptor_seen = 1;
1547 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1551 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1554 update_offsets(&d->pb, &off, &len);
1555 if (len < 0 || len1 > len || len1 <= 0) {
1556 av_log(d->s, AV_LOG_ERROR,
1557 "Tag %x length violation new length %d bytes remaining %d\n",
1559 return AVERROR_INVALIDDATA;
1562 if (d->level++ >= MAX_LEVEL) {
1563 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1564 ret = AVERROR_INVALIDDATA;
1568 if (target_tag && tag != target_tag) {
1569 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1571 ret = AVERROR_INVALIDDATA;
1577 ret = parse_MP4IODescrTag(d, off, len1);
1580 ret = parse_MP4ODescrTag(d, off, len1);
1583 ret = parse_MP4ESDescrTag(d, off, len1);
1585 case MP4DecConfigDescrTag:
1586 ret = parse_MP4DecConfigDescrTag(d, off, len1);
1589 ret = parse_MP4SLDescrTag(d, off, len1);
1596 avio_seek(&d->pb, off + len1, SEEK_SET);
1600 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1601 Mp4Descr *descr, int *descr_count, int max_descr_count)
1603 MP4DescrParseContext d;
1606 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1610 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1612 *descr_count = d.descr_count;
1616 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1617 Mp4Descr *descr, int *descr_count, int max_descr_count)
1619 MP4DescrParseContext d;
1622 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1626 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1628 *descr_count = d.descr_count;
1632 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1635 MpegTSContext *ts = filter->u.section_filter.opaque;
1636 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1638 const uint8_t *p, *p_end;
1640 int mp4_descr_count = 0;
1641 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1643 AVFormatContext *s = ts->stream;
1645 p_end = section + section_len - 4;
1647 if (parse_section_header(&h, &p, p_end) < 0)
1649 if (h.tid != M4OD_TID)
1651 if (skip_identical(&h, tssf))
1654 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1655 MAX_MP4_DESCR_COUNT);
1657 for (pid = 0; pid < NB_PID_MAX; pid++) {
1660 for (i = 0; i < mp4_descr_count; i++) {
1663 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1665 if (ts->pids[pid]->type != MPEGTS_PES) {
1666 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1669 pes = ts->pids[pid]->u.pes_filter.opaque;
1674 pes->sl = mp4_descr[i].sl;
1676 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1677 mp4_descr[i].dec_config_descr_len, 0,
1678 NULL, NULL, NULL, NULL);
1679 ff_mp4_read_dec_config_descr(s, st, &pb);
1680 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1681 st->codecpar->extradata_size > 0)
1682 st->need_parsing = 0;
1683 if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1684 st->codecpar->extradata_size > 0)
1685 st->need_parsing = 0;
1687 st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1688 st->internal->need_context_update = 1;
1691 for (i = 0; i < mp4_descr_count; i++)
1692 av_free(mp4_descr[i].dec_config_descr);
1695 static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1698 AVProgram *prg = NULL;
1699 MpegTSContext *ts = filter->u.section_filter.opaque;
1701 int idx = ff_find_stream_index(ts->stream, filter->pid);
1705 new_data_packet(section, section_len, ts->pkt);
1706 ts->pkt->stream_index = idx;
1707 prg = av_find_program_from_stream(ts->stream, NULL, idx);
1708 if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1709 MpegTSFilter *f = ts->pids[prg->pcr_pid];
1710 if (f && f->last_pcr != -1)
1711 ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1717 static const uint8_t opus_coupled_stream_cnt[9] = {
1718 1, 0, 1, 1, 2, 2, 2, 3, 3
1721 static const uint8_t opus_stream_cnt[9] = {
1722 1, 1, 1, 2, 2, 3, 4, 4, 5,
1725 static const uint8_t opus_channel_map[8][8] = {
1733 { 0,6,1,2,3,4,5,7 },
1736 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1737 const uint8_t **pp, const uint8_t *desc_list_end,
1738 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1741 const uint8_t *desc_end;
1742 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1746 desc_tag = get8(pp, desc_list_end);
1748 return AVERROR_INVALIDDATA;
1749 desc_len = get8(pp, desc_list_end);
1751 return AVERROR_INVALIDDATA;
1752 desc_end = *pp + desc_len;
1753 if (desc_end > desc_list_end)
1754 return AVERROR_INVALIDDATA;
1756 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1758 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1759 stream_type == STREAM_TYPE_PRIVATE_DATA)
1760 mpegts_find_stream_type(st, desc_tag, DESC_types);
1763 case 0x02: /* video stream descriptor */
1764 if (get8(pp, desc_end) & 0x1) {
1765 st->disposition |= AV_DISPOSITION_STILL_IMAGE;
1768 case 0x1E: /* SL descriptor */
1769 desc_es_id = get16(pp, desc_end);
1772 if (ts && ts->pids[pid])
1773 ts->pids[pid]->es_id = desc_es_id;
1774 for (i = 0; i < mp4_descr_count; i++)
1775 if (mp4_descr[i].dec_config_descr_len &&
1776 mp4_descr[i].es_id == desc_es_id) {
1778 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1779 mp4_descr[i].dec_config_descr_len, 0,
1780 NULL, NULL, NULL, NULL);
1781 ff_mp4_read_dec_config_descr(fc, st, &pb);
1782 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1783 st->codecpar->extradata_size > 0) {
1784 st->need_parsing = 0;
1785 st->internal->need_context_update = 1;
1787 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1788 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1791 case 0x1F: /* FMC descriptor */
1792 if (get16(pp, desc_end) < 0)
1794 if (mp4_descr_count > 0 &&
1795 (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1796 (st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1797 st->request_probe > 0) &&
1798 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1800 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1801 mp4_descr->dec_config_descr_len, 0,
1802 NULL, NULL, NULL, NULL);
1803 ff_mp4_read_dec_config_descr(fc, st, &pb);
1804 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1805 st->codecpar->extradata_size > 0) {
1806 st->request_probe = st->need_parsing = 0;
1807 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1808 st->internal->need_context_update = 1;
1812 case 0x56: /* DVB teletext descriptor */
1814 uint8_t *extradata = NULL;
1815 int language_count = desc_len / 5;
1817 if (desc_len > 0 && desc_len % 5 != 0)
1818 return AVERROR_INVALIDDATA;
1820 if (language_count > 0) {
1821 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1822 av_assert0(language_count <= sizeof(language) / 4);
1824 if (st->codecpar->extradata == NULL) {
1825 if (ff_alloc_extradata(st->codecpar, language_count * 2)) {
1826 return AVERROR(ENOMEM);
1830 if (st->codecpar->extradata_size < language_count * 2)
1831 return AVERROR_INVALIDDATA;
1833 extradata = st->codecpar->extradata;
1835 for (i = 0; i < language_count; i++) {
1836 language[i * 4 + 0] = get8(pp, desc_end);
1837 language[i * 4 + 1] = get8(pp, desc_end);
1838 language[i * 4 + 2] = get8(pp, desc_end);
1839 language[i * 4 + 3] = ',';
1841 memcpy(extradata, *pp, 2);
1847 language[i * 4 - 1] = 0;
1848 av_dict_set(&st->metadata, "language", language, 0);
1849 st->internal->need_context_update = 1;
1853 case 0x59: /* subtitling descriptor */
1855 /* 8 bytes per DVB subtitle substream data:
1856 * ISO_639_language_code (3 bytes),
1857 * subtitling_type (1 byte),
1858 * composition_page_id (2 bytes),
1859 * ancillary_page_id (2 bytes) */
1860 int language_count = desc_len / 8;
1862 if (desc_len > 0 && desc_len % 8 != 0)
1863 return AVERROR_INVALIDDATA;
1865 if (language_count > 1) {
1866 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1869 if (language_count > 0) {
1872 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1873 av_assert0(language_count <= sizeof(language) / 4);
1875 if (st->codecpar->extradata == NULL) {
1876 if (ff_alloc_extradata(st->codecpar, language_count * 5)) {
1877 return AVERROR(ENOMEM);
1881 if (st->codecpar->extradata_size < language_count * 5)
1882 return AVERROR_INVALIDDATA;
1884 extradata = st->codecpar->extradata;
1886 for (i = 0; i < language_count; i++) {
1887 language[i * 4 + 0] = get8(pp, desc_end);
1888 language[i * 4 + 1] = get8(pp, desc_end);
1889 language[i * 4 + 2] = get8(pp, desc_end);
1890 language[i * 4 + 3] = ',';
1892 /* hearing impaired subtitles detection using subtitling_type */
1894 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1895 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1896 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1897 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1898 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1899 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1900 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1904 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1905 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1911 language[i * 4 - 1] = 0;
1912 av_dict_set(&st->metadata, "language", language, 0);
1913 st->internal->need_context_update = 1;
1917 case 0x0a: /* ISO 639 language descriptor */
1918 for (i = 0; i + 4 <= desc_len; i += 4) {
1919 language[i + 0] = get8(pp, desc_end);
1920 language[i + 1] = get8(pp, desc_end);
1921 language[i + 2] = get8(pp, desc_end);
1922 language[i + 3] = ',';
1923 switch (get8(pp, desc_end)) {
1925 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1928 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1931 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1932 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
1936 if (i && language[0]) {
1937 language[i - 1] = 0;
1938 /* don't overwrite language, as it may already have been set by
1939 * another, more specific descriptor (e.g. supplementary audio) */
1940 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
1943 case 0x05: /* registration descriptor */
1944 st->codecpar->codec_tag = bytestream_get_le32(pp);
1945 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1946 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) {
1947 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1948 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1949 st->request_probe = 50;
1952 case 0x52: /* stream identifier descriptor */
1953 st->stream_identifier = 1 + get8(pp, desc_end);
1955 case 0x26: /* metadata descriptor */
1956 if (get16(pp, desc_end) == 0xFFFF)
1958 if (get8(pp, desc_end) == 0xFF) {
1959 st->codecpar->codec_tag = bytestream_get_le32(pp);
1960 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
1961 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
1964 case 0x7f: /* DVB extension descriptor */
1965 ext_desc_tag = get8(pp, desc_end);
1966 if (ext_desc_tag < 0)
1967 return AVERROR_INVALIDDATA;
1968 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
1969 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1970 if (!st->codecpar->extradata) {
1971 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
1972 AV_INPUT_BUFFER_PADDING_SIZE);
1973 if (!st->codecpar->extradata)
1974 return AVERROR(ENOMEM);
1976 st->codecpar->extradata_size = sizeof(opus_default_extradata);
1977 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
1979 channel_config_code = get8(pp, desc_end);
1980 if (channel_config_code < 0)
1981 return AVERROR_INVALIDDATA;
1982 if (channel_config_code <= 0x8) {
1983 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1984 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
1985 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
1986 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1987 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
1989 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1991 st->need_parsing = AVSTREAM_PARSE_FULL;
1992 st->internal->need_context_update = 1;
1995 if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
1999 return AVERROR_INVALIDDATA;
2000 flags = get8(pp, desc_end);
2002 if ((flags & 0x80) == 0) /* mix_type */
2003 st->disposition |= AV_DISPOSITION_DEPENDENT;
2005 switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2007 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2008 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2011 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2014 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2018 if (flags & 0x01) { /* language_code_present */
2020 return AVERROR_INVALIDDATA;
2021 language[0] = get8(pp, desc_end);
2022 language[1] = get8(pp, desc_end);
2023 language[2] = get8(pp, desc_end);
2026 /* This language always has to override a possible
2027 * ISO 639 language descriptor language */
2029 av_dict_set(&st->metadata, "language", language, 0);
2033 case 0x6a: /* ac-3_descriptor */
2035 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2036 if (component_type_flag) {
2037 int component_type = get8(pp, desc_end);
2038 int service_type_mask = 0x38; // 0b00111000
2039 int service_type = ((component_type & service_type_mask) >> 3);
2040 if (service_type == 0x02 /* 0b010 */) {
2041 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2042 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2047 case 0x7a: /* enhanced_ac-3_descriptor */
2049 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2050 if (component_type_flag) {
2051 int component_type = get8(pp, desc_end);
2052 int service_type_mask = 0x38; // 0b00111000
2053 int service_type = ((component_type & service_type_mask) >> 3);
2054 if (service_type == 0x02 /* 0b010 */) {
2055 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2056 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2061 case 0xfd: /* ARIB data coding type descriptor */
2062 // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2064 if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2065 // This structure is defined in STD-B10, part 1, listing 5.4 and
2067 // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2068 // Component tag limits are documented in TR-B14, fascicle 2,
2069 // Vol. 3, Section 2, 4.2.8.1
2070 int actual_component_tag = st->stream_identifier - 1;
2071 int picked_profile = FF_PROFILE_UNKNOWN;
2072 int data_component_id = get16(pp, desc_end);
2073 if (data_component_id < 0)
2074 return AVERROR_INVALIDDATA;
2076 switch (data_component_id) {
2078 // [0x30..0x37] are component tags utilized for
2079 // non-mobile captioning service ("profile A").
2080 if (actual_component_tag >= 0x30 &&
2081 actual_component_tag <= 0x37) {
2082 picked_profile = FF_PROFILE_ARIB_PROFILE_A;
2086 // component tag 0x87 signifies a mobile/partial reception
2087 // (1seg) captioning service ("profile C").
2088 if (actual_component_tag == 0x87) {
2089 picked_profile = FF_PROFILE_ARIB_PROFILE_C;
2096 if (picked_profile == FF_PROFILE_UNKNOWN)
2099 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2100 st->codecpar->codec_id = AV_CODEC_ID_ARIB_CAPTION;
2101 st->codecpar->profile = picked_profile;
2102 st->request_probe = 0;
2112 static AVStream *find_matching_stream(MpegTSContext *ts, int pid,
2113 int stream_identifier, int pmt_stream_idx)
2115 AVFormatContext *s = ts->stream;
2117 AVStream *found = NULL;
2119 for (i = 0; i < s->nb_streams; i++) {
2120 AVStream *st = s->streams[i];
2121 if (stream_identifier != -1) { /* match based on "stream identifier descriptor" if present */
2122 if (st->stream_identifier == stream_identifier+1) {
2126 } else if (st->pmt_stream_idx == pmt_stream_idx) { /* match based on position within the PMT */
2133 av_log(ts->stream, AV_LOG_VERBOSE,
2134 "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2135 av_get_media_type_string(found->codecpar->codec_type),
2142 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2144 const uint8_t **pp = &p;
2145 const uint8_t *desc_list_end;
2146 const uint8_t *desc_end;
2148 int desc_len, desc_tag;
2150 desc_list_len = get16(pp, p_end);
2151 if (desc_list_len < 0)
2153 desc_list_len &= 0xfff;
2154 desc_list_end = p + desc_list_len;
2155 if (desc_list_end > p_end)
2159 desc_tag = get8(pp, desc_list_end);
2162 desc_len = get8(pp, desc_list_end);
2165 desc_end = *pp + desc_len;
2166 if (desc_end > desc_list_end)
2169 if (desc_tag == 0x52) {
2170 return get8(pp, desc_end);
2178 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2180 return !(stream_type == 0x13 ||
2181 (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
2184 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2186 MpegTSContext *ts = filter->u.section_filter.opaque;
2187 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2188 SectionHeader h1, *h = &h1;
2191 const uint8_t *p, *p_end, *desc_list_end;
2192 int program_info_length, pcr_pid, pid, stream_type;
2194 uint32_t prog_reg_desc = 0; /* registration descriptor */
2195 int stream_identifier = -1;
2197 int mp4_descr_count = 0;
2198 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2201 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2202 hex_dump_debug(ts->stream, section, section_len);
2204 p_end = section + section_len - 4;
2206 if (parse_section_header(h, &p, p_end) < 0)
2208 if (h->tid != PMT_TID)
2210 if (skip_identical(h, tssf))
2213 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2214 h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2216 if (!ts->scan_all_pmts && ts->skip_changes)
2219 if (ts->skip_unknown_pmt && !get_program(ts, h->id))
2221 if (!ts->skip_clear)
2222 clear_program(ts, h->id);
2224 pcr_pid = get16(&p, p_end);
2228 add_pid_to_pmt(ts, h->id, pcr_pid);
2229 update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2231 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2233 program_info_length = get16(&p, p_end);
2234 if (program_info_length < 0)
2236 program_info_length &= 0xfff;
2237 while (program_info_length >= 2) {
2239 tag = get8(&p, p_end);
2240 len = get8(&p, p_end);
2242 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2244 if (len > program_info_length - 2)
2245 // something else is broken, exit the program_descriptors_loop
2247 program_info_length -= len + 2;
2248 if (tag == 0x1d) { // IOD descriptor
2249 get8(&p, p_end); // scope
2250 get8(&p, p_end); // label
2252 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2253 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2254 } else if (tag == 0x05 && len >= 4) { // registration descriptor
2255 prog_reg_desc = bytestream_get_le32(&p);
2260 p += program_info_length;
2264 // stop parsing after pmt, we found header
2265 if (!ts->stream->nb_streams)
2268 set_pmt_found(ts, h->id);
2271 for (i = 0; ; i++) {
2274 stream_type = get8(&p, p_end);
2275 if (stream_type < 0)
2277 pid = get16(&p, p_end);
2281 if (pid == ts->current_pid)
2284 if (ts->merge_pmt_versions)
2285 stream_identifier = parse_stream_identifier_desc(p, p_end);
2287 /* now create stream */
2288 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2289 pes = ts->pids[pid]->u.pes_filter.opaque;
2290 if (ts->merge_pmt_versions && !pes->st) {
2291 st = find_matching_stream(ts, pid, stream_identifier, i);
2294 pes->stream_type = stream_type;
2299 pes->st = avformat_new_stream(pes->stream, NULL);
2302 pes->st->id = pes->pid;
2303 pes->st->program_num = h->id;
2304 pes->st->pmt_version = h->version;
2305 pes->st->pmt_stream_idx = i;
2308 } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2310 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2311 pes = add_pes_stream(ts, pid, pcr_pid);
2312 if (ts->merge_pmt_versions && pes && !pes->st) {
2313 st = find_matching_stream(ts, pid, stream_identifier, i);
2316 pes->stream_type = stream_type;
2320 if (pes && !pes->st) {
2321 st = avformat_new_stream(pes->stream, NULL);
2325 st->program_num = h->id;
2326 st->pmt_version = h->version;
2327 st->pmt_stream_idx = i;
2330 int idx = ff_find_stream_index(ts->stream, pid);
2332 st = ts->stream->streams[idx];
2334 if (ts->merge_pmt_versions && !st) {
2335 st = find_matching_stream(ts, pid, stream_identifier, i);
2338 st = avformat_new_stream(ts->stream, NULL);
2342 st->program_num = h->id;
2343 st->pmt_version = h->version;
2344 st->pmt_stream_idx = i;
2345 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2346 if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2347 mpegts_find_stream_type(st, stream_type, SCTE_types);
2348 mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2356 if (pes && !pes->stream_type)
2357 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2359 add_pid_to_pmt(ts, h->id, pid);
2361 av_program_add_stream_index(ts->stream, h->id, st->index);
2363 desc_list_len = get16(&p, p_end);
2364 if (desc_list_len < 0)
2366 desc_list_len &= 0xfff;
2367 desc_list_end = p + desc_list_len;
2368 if (desc_list_end > p_end)
2371 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2372 desc_list_end, mp4_descr,
2373 mp4_descr_count, pid, ts) < 0)
2376 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2377 stream_type == 0x83 && pes->sub_st) {
2378 av_program_add_stream_index(ts->stream, h->id,
2379 pes->sub_st->index);
2380 pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2386 if (!ts->pids[pcr_pid])
2387 mpegts_open_pcr_filter(ts, pcr_pid);
2390 for (i = 0; i < mp4_descr_count; i++)
2391 av_free(mp4_descr[i].dec_config_descr);
2394 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2396 MpegTSContext *ts = filter->u.section_filter.opaque;
2397 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2398 SectionHeader h1, *h = &h1;
2399 const uint8_t *p, *p_end;
2403 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2404 hex_dump_debug(ts->stream, section, section_len);
2406 p_end = section + section_len - 4;
2408 if (parse_section_header(h, &p, p_end) < 0)
2410 if (h->tid != PAT_TID)
2412 if (ts->skip_changes)
2415 if (skip_identical(h, tssf))
2417 ts->stream->ts_id = h->id;
2421 sid = get16(&p, p_end);
2424 pmt_pid = get16(&p, p_end);
2429 if (pmt_pid == ts->current_pid)
2432 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2434 if (sid == 0x0000) {
2437 MpegTSFilter *fil = ts->pids[pmt_pid];
2438 program = av_new_program(ts->stream, sid);
2440 program->program_num = sid;
2441 program->pmt_pid = pmt_pid;
2444 if ( fil->type != MPEGTS_SECTION
2445 || fil->pid != pmt_pid
2446 || fil->u.section_filter.section_cb != pmt_cb)
2447 mpegts_close_filter(ts, ts->pids[pmt_pid]);
2449 if (!ts->pids[pmt_pid])
2450 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2451 add_pat_entry(ts, sid);
2452 add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2453 add_pid_to_pmt(ts, sid, pmt_pid);
2459 for (j=0; j<ts->stream->nb_programs; j++) {
2460 for (i = 0; i < ts->nb_prg; i++)
2461 if (ts->prg[i].id == ts->stream->programs[j]->id)
2463 if (i==ts->nb_prg && !ts->skip_clear)
2464 clear_avprogram(ts, ts->stream->programs[j]->id);
2469 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2471 MpegTSContext *ts = filter->u.section_filter.opaque;
2472 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2473 SectionHeader h1, *h = &h1;
2474 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2475 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2476 char *name, *provider_name;
2478 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2479 hex_dump_debug(ts->stream, section, section_len);
2481 p_end = section + section_len - 4;
2483 if (parse_section_header(h, &p, p_end) < 0)
2485 if (h->tid != SDT_TID)
2487 if (ts->skip_changes)
2489 if (skip_identical(h, tssf))
2492 onid = get16(&p, p_end);
2495 val = get8(&p, p_end);
2499 sid = get16(&p, p_end);
2502 val = get8(&p, p_end);
2505 desc_list_len = get16(&p, p_end);
2506 if (desc_list_len < 0)
2508 desc_list_len &= 0xfff;
2509 desc_list_end = p + desc_list_len;
2510 if (desc_list_end > p_end)
2513 desc_tag = get8(&p, desc_list_end);
2516 desc_len = get8(&p, desc_list_end);
2517 desc_end = p + desc_len;
2518 if (desc_len < 0 || desc_end > desc_list_end)
2521 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2522 desc_tag, desc_len);
2526 service_type = get8(&p, p_end);
2527 if (service_type < 0)
2529 provider_name = getstr8(&p, p_end);
2532 name = getstr8(&p, p_end);
2534 AVProgram *program = av_new_program(ts->stream, sid);
2536 av_dict_set(&program->metadata, "service_name", name, 0);
2537 av_dict_set(&program->metadata, "service_provider",
2542 av_free(provider_name);
2553 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2554 const uint8_t *packet);
2556 /* handle one TS packet */
2557 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2560 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2561 has_adaptation, has_payload;
2562 const uint8_t *p, *p_end;
2565 pid = AV_RB16(packet + 1) & 0x1fff;
2566 is_start = packet[1] & 0x40;
2567 tss = ts->pids[pid];
2568 if (ts->auto_guess && !tss && is_start) {
2569 add_pes_stream(ts, pid, -1);
2570 tss = ts->pids[pid];
2575 tss->discard = discard_pid(ts, pid);
2578 ts->current_pid = pid;
2580 afc = (packet[3] >> 4) & 3;
2581 if (afc == 0) /* reserved value */
2583 has_adaptation = afc & 2;
2584 has_payload = afc & 1;
2585 is_discontinuity = has_adaptation &&
2586 packet[4] != 0 && /* with length > 0 */
2587 (packet[5] & 0x80); /* and discontinuity indicated */
2589 /* continuity check (currently not used) */
2590 cc = (packet[3] & 0xf);
2591 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2592 cc_ok = pid == 0x1FFF || // null packet PID
2599 av_log(ts->stream, AV_LOG_DEBUG,
2600 "Continuity check failed for pid %d expected %d got %d\n",
2601 pid, expected_cc, cc);
2602 if (tss->type == MPEGTS_PES) {
2603 PESContext *pc = tss->u.pes_filter.opaque;
2604 pc->flags |= AV_PKT_FLAG_CORRUPT;
2608 if (packet[1] & 0x80) {
2609 av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2610 if (tss->type == MPEGTS_PES) {
2611 PESContext *pc = tss->u.pes_filter.opaque;
2612 pc->flags |= AV_PKT_FLAG_CORRUPT;
2617 if (has_adaptation) {
2620 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2621 tss->last_pcr = pcr_h * 300 + pcr_l;
2622 /* skip adaptation field */
2625 /* if past the end of packet, ignore */
2626 p_end = packet + TS_PACKET_SIZE;
2627 if (p >= p_end || !has_payload)
2630 pos = avio_tell(ts->stream->pb);
2632 av_assert0(pos >= TS_PACKET_SIZE);
2633 ts->pos47_full = pos - TS_PACKET_SIZE;
2636 if (tss->type == MPEGTS_SECTION) {
2638 /* pointer field present */
2640 if (len > p_end - p)
2643 /* write remaining section bytes */
2644 write_section_data(ts, tss,
2646 /* check whether filter has been closed */
2652 write_section_data(ts, tss,
2657 write_section_data(ts, tss,
2662 // stop find_stream_info from waiting for more streams
2663 // when all programs have received a PMT
2664 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2666 for (i = 0; i < ts->nb_prg; i++) {
2667 if (!ts->prg[i].pmt_found)
2670 if (i == ts->nb_prg && ts->nb_prg > 0) {
2672 for (i = 0; i < ts->stream->nb_streams; i++) {
2673 AVStream *st = ts->stream->streams[i];
2674 if (st->codecpar->codec_type >= 0)
2675 types |= 1<<st->codecpar->codec_type;
2677 if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2678 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2679 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2686 // Note: The position here points actually behind the current packet.
2687 if (tss->type == MPEGTS_PES) {
2688 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2689 pos - ts->raw_packet_size)) < 0)
2697 static void reanalyze(MpegTSContext *ts) {
2698 AVIOContext *pb = ts->stream->pb;
2699 int64_t pos = avio_tell(pb);
2702 pos -= ts->pos47_full;
2703 if (pos == TS_PACKET_SIZE) {
2704 ts->size_stat[0] ++;
2705 } else if (pos == TS_DVHS_PACKET_SIZE) {
2706 ts->size_stat[1] ++;
2707 } else if (pos == TS_FEC_PACKET_SIZE) {
2708 ts->size_stat[2] ++;
2711 ts->size_stat_count ++;
2712 if (ts->size_stat_count > SIZE_STAT_THRESHOLD) {
2714 if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2715 newsize = TS_PACKET_SIZE;
2716 } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2717 newsize = TS_DVHS_PACKET_SIZE;
2718 } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2719 newsize = TS_FEC_PACKET_SIZE;
2721 if (newsize && newsize != ts->raw_packet_size) {
2722 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2723 ts->raw_packet_size = newsize;
2725 ts->size_stat_count = 0;
2726 memset(ts->size_stat, 0, sizeof(ts->size_stat));
2730 /* XXX: try to find a better synchro over several packets (use
2731 * get_packet_size() ?) */
2732 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2734 MpegTSContext *ts = s->priv_data;
2735 AVIOContext *pb = s->pb;
2737 uint64_t pos = avio_tell(pb);
2739 avio_seek(pb, -FFMIN(seekback, pos), SEEK_CUR);
2741 //Special case for files like 01c56b0dc1.ts
2742 if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2743 avio_seek(pb, 12, SEEK_CUR);
2747 for (i = 0; i < ts->resync_size; i++) {
2752 avio_seek(pb, -1, SEEK_CUR);
2753 reanalyze(s->priv_data);
2757 av_log(s, AV_LOG_ERROR,
2758 "max resync size reached, could not find sync byte\n");
2760 return AVERROR_INVALIDDATA;
2763 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2764 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2765 const uint8_t **data)
2767 AVIOContext *pb = s->pb;
2771 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2772 if (len != TS_PACKET_SIZE)
2773 return len < 0 ? len : AVERROR_EOF;
2774 /* check packet sync byte */
2775 if ((*data)[0] != 0x47) {
2776 /* find a new packet start */
2778 if (mpegts_resync(s, raw_packet_size, *data) < 0)
2779 return AVERROR(EAGAIN);
2789 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2791 AVIOContext *pb = s->pb;
2792 int skip = raw_packet_size - TS_PACKET_SIZE;
2794 avio_skip(pb, skip);
2797 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2799 AVFormatContext *s = ts->stream;
2800 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2801 const uint8_t *data;
2805 if (avio_tell(s->pb) != ts->last_pos) {
2807 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2808 /* seek detected, flush pes buffer */
2809 for (i = 0; i < NB_PID_MAX; i++) {
2811 if (ts->pids[i]->type == MPEGTS_PES) {
2812 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2813 av_buffer_unref(&pes->buffer);
2814 pes->data_index = 0;
2815 pes->state = MPEGTS_SKIP; /* skip until pes header */
2816 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2817 ts->pids[i]->u.section_filter.last_ver = -1;
2819 ts->pids[i]->last_cc = -1;
2820 ts->pids[i]->last_pcr = -1;
2827 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2830 if (nb_packets != 0 && packet_num >= nb_packets ||
2831 ts->stop_parse > 1) {
2832 ret = AVERROR(EAGAIN);
2835 if (ts->stop_parse > 0)
2838 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2841 ret = handle_packet(ts, data);
2842 finished_reading_packet(s, ts->raw_packet_size);
2846 ts->last_pos = avio_tell(s->pb);
2850 static int mpegts_probe(AVProbeData *p)
2852 const int size = p->buf_size;
2856 int check_count = size / TS_FEC_PACKET_SIZE;
2857 #define CHECK_COUNT 10
2858 #define CHECK_BLOCK 100
2863 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2864 int left = FFMIN(check_count - i, CHECK_BLOCK);
2865 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2866 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2867 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2868 score = FFMAX3(score, dvhs_score, fec_score);
2870 maxscore = FFMAX(maxscore, score);
2873 sumscore = sumscore * CHECK_COUNT / check_count;
2874 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2876 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2878 if (check_count > CHECK_COUNT && sumscore > 6) {
2879 return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2880 } else if (check_count >= CHECK_COUNT && sumscore > 6) {
2881 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2882 } else if (check_count >= CHECK_COUNT && maxscore > 6) {
2883 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2884 } else if (sumscore > 6) {
2891 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2892 * (-1) if not available */
2893 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2895 int afc, len, flags;
2899 afc = (packet[3] >> 4) & 3;
2901 return AVERROR_INVALIDDATA;
2906 return AVERROR_INVALIDDATA;
2909 if (!(flags & 0x10))
2910 return AVERROR_INVALIDDATA;
2912 return AVERROR_INVALIDDATA;
2914 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2915 *ppcr_low = ((p[4] & 1) << 8) | p[5];
2919 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2921 /* NOTE: We attempt to seek on non-seekable files as well, as the
2922 * probe buffer usually is big enough. Only warn if the seek failed
2923 * on files where the seek should work. */
2924 if (avio_seek(pb, pos, SEEK_SET) < 0)
2925 av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2928 static int mpegts_read_header(AVFormatContext *s)
2930 MpegTSContext *ts = s->priv_data;
2931 AVIOContext *pb = s->pb;
2932 uint8_t buf[8 * 1024] = {0};
2934 int64_t pos, probesize = s->probesize;
2936 s->internal->prefer_codec_framerate = 1;
2938 if (ffio_ensure_seekback(pb, probesize) < 0)
2939 av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2941 /* read the first 8192 bytes to get packet size */
2942 pos = avio_tell(pb);
2943 len = avio_read(pb, buf, sizeof(buf));
2944 ts->raw_packet_size = get_packet_size(buf, len);
2945 if (ts->raw_packet_size <= 0) {
2946 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2947 ts->raw_packet_size = TS_PACKET_SIZE;
2952 if (s->iformat == &ff_mpegts_demuxer) {
2955 /* first do a scan to get all the services */
2956 seek_back(s, pb, pos);
2958 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2960 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2962 handle_packets(ts, probesize / ts->raw_packet_size);
2963 /* if could not find service, enable auto_guess */
2967 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2969 s->ctx_flags |= AVFMTCTX_NOHEADER;
2972 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2973 int64_t pcrs[2], pcr_h;
2974 int packet_count[2];
2975 uint8_t packet[TS_PACKET_SIZE];
2976 const uint8_t *data;
2978 /* only read packets */
2980 st = avformat_new_stream(s, NULL);
2982 return AVERROR(ENOMEM);
2983 avpriv_set_pts_info(st, 60, 1, 27000000);
2984 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2985 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
2987 /* we iterate until we find two PCRs to estimate the bitrate */
2992 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2995 pid = AV_RB16(data + 1) & 0x1fff;
2996 if ((pcr_pid == -1 || pcr_pid == pid) &&
2997 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2998 finished_reading_packet(s, ts->raw_packet_size);
3000 packet_count[nb_pcrs] = nb_packets;
3001 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
3004 if (pcrs[1] - pcrs[0] > 0) {
3005 /* the difference needs to be positive to make sense for bitrate computation */
3008 av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
3010 packet_count[0] = packet_count[1];
3015 finished_reading_packet(s, ts->raw_packet_size);
3020 /* NOTE1: the bitrate is computed without the FEC */
3021 /* NOTE2: it is only the bitrate of the start of the stream */
3022 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
3023 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
3024 s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
3025 st->codecpar->bit_rate = s->bit_rate;
3026 st->start_time = ts->cur_pcr;
3027 av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
3028 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
3031 seek_back(s, pb, pos);
3035 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
3037 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
3039 MpegTSContext *ts = s->priv_data;
3041 int64_t pcr_h, next_pcr_h, pos;
3042 int pcr_l, next_pcr_l;
3043 uint8_t pcr_buf[12];
3044 const uint8_t *data;
3046 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
3047 return AVERROR(ENOMEM);
3048 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
3049 pkt->pos = avio_tell(s->pb);
3051 av_packet_unref(pkt);
3054 if (data != pkt->data)
3055 memcpy(pkt->data, data, ts->raw_packet_size);
3056 finished_reading_packet(s, ts->raw_packet_size);
3057 if (ts->mpeg2ts_compute_pcr) {
3058 /* compute exact PCR for each packet */
3059 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
3060 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
3061 pos = avio_tell(s->pb);
3062 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
3063 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
3064 avio_read(s->pb, pcr_buf, 12);
3065 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
3066 /* XXX: not precise enough */
3068 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
3073 avio_seek(s->pb, pos, SEEK_SET);
3074 /* no next PCR found: we use previous increment */
3075 ts->cur_pcr = pcr_h * 300 + pcr_l;
3077 pkt->pts = ts->cur_pcr;
3078 pkt->duration = ts->pcr_incr;
3079 ts->cur_pcr += ts->pcr_incr;
3081 pkt->stream_index = 0;
3085 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
3087 MpegTSContext *ts = s->priv_data;
3092 ret = handle_packets(ts, 0);
3094 av_packet_unref(ts->pkt);
3095 /* flush pes data left */
3096 for (i = 0; i < NB_PID_MAX; i++)
3097 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
3098 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3099 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
3100 ret = new_pes_packet(pes, pkt);
3103 pes->state = MPEGTS_SKIP;
3110 if (!ret && pkt->size < 0)
3111 ret = AVERROR_INVALIDDATA;
3115 static void mpegts_free(MpegTSContext *ts)
3121 for (i = 0; i < NB_PID_MAX; i++)
3123 mpegts_close_filter(ts, ts->pids[i]);
3126 static int mpegts_read_close(AVFormatContext *s)
3128 MpegTSContext *ts = s->priv_data;
3133 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3134 int64_t *ppos, int64_t pos_limit)
3136 MpegTSContext *ts = s->priv_data;
3137 int64_t pos, timestamp;
3138 uint8_t buf[TS_PACKET_SIZE];
3139 int pcr_l, pcr_pid =
3140 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3141 int pos47 = ts->pos47_full % ts->raw_packet_size;
3143 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3144 ts->raw_packet_size + pos47;
3145 while(pos < pos_limit) {
3146 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3147 return AV_NOPTS_VALUE;
3148 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3149 return AV_NOPTS_VALUE;
3150 if (buf[0] != 0x47) {
3151 if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3152 return AV_NOPTS_VALUE;
3153 pos = avio_tell(s->pb);
3156 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3157 parse_pcr(×tamp, &pcr_l, buf) == 0) {
3161 pos += ts->raw_packet_size;
3164 return AV_NOPTS_VALUE;
3167 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3168 int64_t *ppos, int64_t pos_limit)
3170 MpegTSContext *ts = s->priv_data;
3172 int pos47 = ts->pos47_full % ts->raw_packet_size;
3173 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3174 ff_read_frame_flush(s);
3175 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3176 return AV_NOPTS_VALUE;
3177 while(pos < pos_limit) {
3180 av_init_packet(&pkt);
3181 ret = av_read_frame(s, &pkt);
3183 return AV_NOPTS_VALUE;
3184 if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
3185 ff_reduce_index(s, pkt.stream_index);
3186 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3187 if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
3188 int64_t dts = pkt.dts;
3190 av_packet_unref(&pkt);
3195 av_packet_unref(&pkt);
3198 return AV_NOPTS_VALUE;
3201 /**************************************************************/
3202 /* parsing functions - called from other demuxers such as RTP */
3204 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
3208 ts = av_mallocz(sizeof(MpegTSContext));
3211 /* no stream case, currently used by RTP */
3212 ts->raw_packet_size = TS_PACKET_SIZE;
3215 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3216 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3221 /* return the consumed length if a packet was output, or -1 if no
3222 * packet is output */
3223 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
3224 const uint8_t *buf, int len)
3232 if (len < TS_PACKET_SIZE)
3233 return AVERROR_INVALIDDATA;
3234 if (buf[0] != 0x47) {
3238 handle_packet(ts, buf);
3239 buf += TS_PACKET_SIZE;
3240 len -= TS_PACKET_SIZE;
3241 if (ts->stop_parse == 1)
3248 void avpriv_mpegts_parse_close(MpegTSContext *ts)
3254 AVInputFormat ff_mpegts_demuxer = {
3256 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3257 .priv_data_size = sizeof(MpegTSContext),
3258 .read_probe = mpegts_probe,
3259 .read_header = mpegts_read_header,
3260 .read_packet = mpegts_read_packet,
3261 .read_close = mpegts_read_close,
3262 .read_timestamp = mpegts_get_dts,
3263 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3264 .priv_class = &mpegts_class,
3267 AVInputFormat ff_mpegtsraw_demuxer = {
3268 .name = "mpegtsraw",
3269 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3270 .priv_data_size = sizeof(MpegTSContext),
3271 .read_header = mpegts_read_header,
3272 .read_packet = mpegts_raw_read_packet,
3273 .read_close = mpegts_read_close,
3274 .read_timestamp = mpegts_get_dts,
3275 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3276 .priv_class = &mpegtsraw_class,