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 "config_components.h"
24 #include "libavutil/buffer.h"
25 #include "libavutil/common.h"
26 #include "libavutil/crc.h"
27 #include "libavutil/internal.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/log.h"
30 #include "libavutil/dict.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/dovi_meta.h"
35 #include "libavcodec/avcodec.h"
36 #include "libavcodec/bytestream.h"
37 #include "libavcodec/defs.h"
38 #include "libavcodec/get_bits.h"
39 #include "libavcodec/opus.h"
43 #include "avio_internal.h"
51 /* maximum size in which we look for synchronization if
52 * synchronization is lost */
53 #define MAX_RESYNC_SIZE 65536
55 #define MAX_MP4_DESCR_COUNT 16
57 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
59 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
60 (modulus) = (dividend) % (divisor); \
61 (prev_dividend) = (dividend); \
64 #define PROBE_PACKET_MAX_BUF 8192
65 #define PROBE_PACKET_MARGIN 5
67 enum MpegTSFilterType {
73 typedef struct MpegTSFilter MpegTSFilter;
75 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
76 int is_start, int64_t pos);
78 typedef struct MpegTSPESFilter {
83 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
85 typedef void SetServiceCallback (void *opaque, int ret);
87 typedef struct MpegTSSectionFilter {
94 unsigned int check_crc : 1;
95 unsigned int end_of_section_reached : 1;
96 SectionCallback *section_cb;
98 } MpegTSSectionFilter;
100 struct MpegTSFilter {
103 int last_cc; /* last cc code (-1 if first packet) */
106 enum MpegTSFilterType type;
108 MpegTSPESFilter pes_filter;
109 MpegTSSectionFilter section_filter;
115 int stream_identifier;
118 #define MAX_STREAMS_PER_PROGRAM 128
119 #define MAX_PIDS_PER_PROGRAM (MAX_STREAMS_PER_PROGRAM + 2)
121 unsigned int id; // program id/service id
122 unsigned int nb_pids;
123 unsigned int pids[MAX_PIDS_PER_PROGRAM];
124 unsigned int nb_streams;
125 struct Stream streams[MAX_STREAMS_PER_PROGRAM];
127 /** have we found pmt for this program */
131 struct MpegTSContext {
132 const AVClass *class;
134 AVFormatContext *stream;
135 /** raw packet size, including FEC if present */
140 /** if true, all pids are analyzed to find streams */
143 /** compute exact PCR for each transport stream packet */
144 int mpeg2ts_compute_pcr;
146 /** fix dvb teletext pts */
147 int fix_teletext_pts;
149 int64_t cur_pcr; /**< used to estimate the exact PCR */
150 int64_t pcr_incr; /**< used to estimate the exact PCR */
152 /* data needed to handle file based ts */
153 /** stop parsing loop */
155 /** packet containing Audio/Video data */
157 /** to detect seek */
162 int skip_unknown_pmt;
167 int merge_pmt_versions;
170 /******************************************/
171 /* private mpegts data */
173 /** structure to keep track of Program->pids mapping */
177 int8_t crc_validity[NB_PID_MAX];
178 /** filters for various streams specified by PMT + for the PAT and PMT */
179 MpegTSFilter *pids[NB_PID_MAX];
182 AVStream *epg_stream;
183 AVBufferPool* pools[32];
186 #define MPEGTS_OPTIONS \
187 { "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 }
189 static const AVOption options[] = {
191 {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
192 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
193 {"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
194 {.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
195 {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
196 {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
197 {"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
198 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
199 {"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
200 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
201 {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
202 {.i64 = 0}, 0, 1, 0 },
203 {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
204 {.i64 = 0}, 0, 1, 0 },
205 {"max_packet_size", "maximum size of emitted packet", offsetof(MpegTSContext, max_packet_size), AV_OPT_TYPE_INT,
206 {.i64 = 204800}, 1, INT_MAX/2, AV_OPT_FLAG_DECODING_PARAM },
210 static const AVClass mpegts_class = {
211 .class_name = "mpegts demuxer",
212 .item_name = av_default_item_name,
214 .version = LIBAVUTIL_VERSION_INT,
217 static const AVOption raw_options[] = {
219 { "compute_pcr", "compute exact PCR for each transport stream packet",
220 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
221 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
222 { "ts_packetsize", "output option carrying the raw packet size",
223 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
225 AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
229 static const AVClass mpegtsraw_class = {
230 .class_name = "mpegtsraw demuxer",
231 .item_name = av_default_item_name,
232 .option = raw_options,
233 .version = LIBAVUTIL_VERSION_INT,
236 /* TS stream handling */
241 MPEGTS_PESHEADER_FILL,
246 /* enough for PES header + length */
247 #define PES_START_SIZE 6
248 #define PES_HEADER_SIZE 9
249 #define MAX_PES_HEADER_SIZE (9 + 255)
251 typedef struct PESContext {
253 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
256 AVFormatContext *stream;
258 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
259 enum MpegTSState state;
260 /* used to get the format */
262 int flags; /**< copied to the AVPacket flags */
263 int PES_packet_length;
265 int extended_stream_id;
268 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
269 uint8_t header[MAX_PES_HEADER_SIZE];
275 extern const AVInputFormat ff_mpegts_demuxer;
277 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
280 for (i = 0; i < ts->nb_prg; i++) {
281 if (ts->prg[i].id == programid) {
288 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
290 AVProgram *prg = NULL;
293 for (i = 0; i < ts->stream->nb_programs; i++)
294 if (ts->stream->programs[i]->id == programid) {
295 prg = ts->stream->programs[i];
300 prg->nb_stream_indexes = 0;
303 static void clear_program(struct Program *p)
312 static void clear_programs(MpegTSContext *ts)
318 static struct Program * add_program(MpegTSContext *ts, unsigned int programid)
320 struct Program *p = get_program(ts, programid);
323 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
327 p = &ts->prg[ts->nb_prg];
334 static void add_pid_to_program(struct Program *p, unsigned int pid)
340 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
343 for (i = 0; i < p->nb_pids; i++)
344 if (p->pids[i] == pid)
347 p->pids[p->nb_pids++] = pid;
350 static void update_av_program_info(AVFormatContext *s, unsigned int programid,
351 unsigned int pid, int version)
354 for (i = 0; i < s->nb_programs; i++) {
355 AVProgram *program = s->programs[i];
356 if (program->id == programid) {
357 int old_pcr_pid = program->pcr_pid,
358 old_version = program->pmt_version;
359 program->pcr_pid = pid;
360 program->pmt_version = version;
362 if (old_version != -1 && old_version != version) {
363 av_log(s, AV_LOG_VERBOSE,
364 "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
365 programid, old_version, version, old_pcr_pid, pid);
373 * @brief discard_pid() decides if the pid is to be discarded according
374 * to caller's programs selection
375 * @param ts : - TS context
377 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
380 static int discard_pid(MpegTSContext *ts, unsigned int pid)
383 int used = 0, discarded = 0;
389 /* If none of the programs have .discard=AVDISCARD_ALL then there's
390 * no way we have to discard this packet */
391 for (k = 0; k < ts->stream->nb_programs; k++)
392 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
394 if (k == ts->stream->nb_programs)
397 for (i = 0; i < ts->nb_prg; i++) {
399 for (j = 0; j < p->nb_pids; j++) {
400 if (p->pids[j] != pid)
402 // is program with id p->id set to be discarded?
403 for (k = 0; k < ts->stream->nb_programs; k++) {
404 if (ts->stream->programs[k]->id == p->id) {
405 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
414 return !used && discarded;
418 * Assemble PES packets out of TS packets, and then call the "section_cb"
419 * function when they are complete.
421 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
422 const uint8_t *buf, int buf_size, int is_start)
424 MpegTSSectionFilter *tss = &tss1->u.section_filter;
425 uint8_t *cur_section_buf = NULL;
429 memcpy(tss->section_buf, buf, buf_size);
430 tss->section_index = buf_size;
431 tss->section_h_size = -1;
432 tss->end_of_section_reached = 0;
434 if (tss->end_of_section_reached)
436 len = MAX_SECTION_SIZE - tss->section_index;
439 memcpy(tss->section_buf + tss->section_index, buf, len);
440 tss->section_index += len;
444 cur_section_buf = tss->section_buf;
445 while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
446 /* compute section length if possible */
447 if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
448 len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
449 if (len > MAX_SECTION_SIZE)
451 tss->section_h_size = len;
454 if (tss->section_h_size != -1 &&
455 tss->section_index >= offset + tss->section_h_size) {
457 tss->end_of_section_reached = 1;
459 if (tss->check_crc) {
460 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
461 if (tss->section_h_size >= 4)
462 tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
465 ts->crc_validity[ tss1->pid ] = 100;
466 }else if (ts->crc_validity[ tss1->pid ] > -10) {
467 ts->crc_validity[ tss1->pid ]--;
472 tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
477 cur_section_buf += tss->section_h_size;
478 offset += tss->section_h_size;
479 tss->section_h_size = -1;
481 tss->section_h_size = -1;
482 tss->end_of_section_reached = 0;
488 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
489 enum MpegTSFilterType type)
491 MpegTSFilter *filter;
493 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
495 if (pid >= NB_PID_MAX || ts->pids[pid])
497 filter = av_mallocz(sizeof(MpegTSFilter));
500 ts->pids[pid] = filter;
505 filter->last_cc = -1;
506 filter->last_pcr= -1;
511 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
513 SectionCallback *section_cb,
517 MpegTSFilter *filter;
518 MpegTSSectionFilter *sec;
519 uint8_t *section_buf = av_mallocz(MAX_SECTION_SIZE);
524 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION))) {
525 av_free(section_buf);
528 sec = &filter->u.section_filter;
529 sec->section_cb = section_cb;
530 sec->opaque = opaque;
531 sec->section_buf = section_buf;
532 sec->check_crc = check_crc;
538 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
542 MpegTSFilter *filter;
543 MpegTSPESFilter *pes;
545 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
548 pes = &filter->u.pes_filter;
549 pes->pes_cb = pes_cb;
550 pes->opaque = opaque;
554 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
556 return mpegts_open_filter(ts, pid, MPEGTS_PCR);
559 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
564 if (filter->type == MPEGTS_SECTION)
565 av_freep(&filter->u.section_filter.section_buf);
566 else if (filter->type == MPEGTS_PES) {
567 PESContext *pes = filter->u.pes_filter.opaque;
568 av_buffer_unref(&pes->buffer);
569 /* referenced private data will be freed later in
570 * avformat_close_input (pes->st->priv_data == pes) */
571 if (!pes->st || pes->merged_st) {
572 av_freep(&filter->u.pes_filter.opaque);
577 ts->pids[pid] = NULL;
580 static int analyze(const uint8_t *buf, int size, int packet_size,
583 int stat[TS_MAX_PACKET_SIZE];
588 memset(stat, 0, packet_size * sizeof(*stat));
590 for (i = 0; i < size - 3; i++) {
591 if (buf[i] == 0x47) {
592 int pid = AV_RB16(buf+1) & 0x1FFF;
593 int asc = buf[i + 3] & 0x30;
594 if (!probe || pid == 0x1FFF || asc) {
595 int x = i % packet_size;
598 if (stat[x] > best_score) {
599 best_score = stat[x];
605 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
608 /* autodetect fec presence */
609 static int get_packet_size(AVFormatContext* s)
611 int score, fec_score, dvhs_score;
615 /*init buffer to store stream for probing */
616 uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
618 int max_iterations = 16;
620 while (buf_size < PROBE_PACKET_MAX_BUF && max_iterations--) {
621 ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
623 return AVERROR_INVALIDDATA;
626 score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
627 dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
628 fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
629 av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
630 buf_size, score, dvhs_score, fec_score);
632 margin = mid_pred(score, fec_score, dvhs_score);
634 if (buf_size < PROBE_PACKET_MAX_BUF)
635 margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
638 return TS_PACKET_SIZE;
639 else if (dvhs_score > margin)
640 return TS_DVHS_PACKET_SIZE;
641 else if (fec_score > margin)
642 return TS_FEC_PACKET_SIZE;
644 return AVERROR_INVALIDDATA;
647 typedef struct SectionHeader {
651 uint8_t current_next;
653 uint8_t last_sec_num;
656 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
658 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
661 tssf->last_ver = h->version;
662 tssf->last_crc = tssf->crc;
667 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
674 return AVERROR_INVALIDDATA;
680 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
687 return AVERROR_INVALIDDATA;
694 /* read and allocate a DVB string preceded by its length */
695 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
702 len = get8(&p, p_end);
709 const char *encodings[] = {
710 "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
711 "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
712 "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
713 "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
714 "", "", "", "", "", "", "", ""
718 size_t inlen = len, outlen = inlen * 6 + 1;
719 if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
721 snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
724 cd = iconv_open("UTF-8", iso8859);
725 } else if (p[0] < 0x20) {
728 cd = iconv_open("UTF-8", encodings[*p]);
731 cd = iconv_open("UTF-8", encodings[0]);
733 if (cd == (iconv_t)-1)
735 str = out = av_malloc(outlen);
740 if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
752 str = av_malloc(len + 1);
762 static int parse_section_header(SectionHeader *h,
763 const uint8_t **pp, const uint8_t *p_end)
767 val = get8(pp, p_end);
772 val = get16(pp, p_end);
776 val = get8(pp, p_end);
779 h->version = (val >> 1) & 0x1f;
780 h->current_next = val & 0x01;
781 val = get8(pp, p_end);
785 val = get8(pp, p_end);
788 h->last_sec_num = val;
792 typedef struct StreamType {
793 uint32_t stream_type;
794 enum AVMediaType codec_type;
795 enum AVCodecID codec_id;
798 static const StreamType ISO_types[] = {
799 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
800 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
801 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
802 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
803 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
804 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
805 /* Makito encoder sets stream type 0x11 for AAC,
806 * so auto-detect LOAS/LATM instead of hardcoding it. */
807 #if !CONFIG_LOAS_DEMUXER
808 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
810 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
811 { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
812 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
813 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
814 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
815 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
816 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
817 { 0xd2, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS2 },
818 { 0xd4, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS3 },
819 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
823 static const StreamType HDMV_types[] = {
824 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
825 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
826 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
827 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
828 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
829 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
830 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
831 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
832 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
833 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
834 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
839 static const StreamType SCTE_types[] = {
840 { 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
845 static const StreamType MISC_types[] = {
846 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
847 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
851 /* HLS Sample Encryption Types */
852 static const StreamType HLS_SAMPLE_ENC_types[] = {
853 { 0xdb, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264},
854 { 0xcf, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
855 { 0xc1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
856 { 0xc2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3},
860 static const StreamType REGD_types[] = {
861 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
862 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
863 { MKTAG('A', 'C', '-', '4'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC4 },
864 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
865 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
866 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
867 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
868 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
869 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
870 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
871 { MKTAG('V', 'A', 'N', 'C'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_2038 },
872 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
873 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
874 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
878 static const StreamType METADATA_types[] = {
879 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
880 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
884 /* descriptor present */
885 static const StreamType DESC_types[] = {
886 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
887 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
888 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
889 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
890 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
894 static void mpegts_find_stream_type(AVStream *st,
895 uint32_t stream_type,
896 const StreamType *types)
898 FFStream *const sti = ffstream(st);
899 for (; types->stream_type; types++)
900 if (stream_type == types->stream_type) {
901 if (st->codecpar->codec_type != types->codec_type ||
902 st->codecpar->codec_id != types->codec_id) {
903 st->codecpar->codec_type = types->codec_type;
904 st->codecpar->codec_id = types->codec_id;
905 sti->need_context_update = 1;
907 sti->request_probe = 0;
912 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
913 uint32_t stream_type, uint32_t prog_reg_desc)
915 FFStream *const sti = ffstream(st);
916 int old_codec_type = st->codecpar->codec_type;
917 int old_codec_id = st->codecpar->codec_id;
918 int old_codec_tag = st->codecpar->codec_tag;
920 if (avcodec_is_open(sti->avctx)) {
921 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
925 avpriv_set_pts_info(st, 33, 1, 90000);
927 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
928 st->codecpar->codec_id = AV_CODEC_ID_NONE;
929 sti->need_parsing = AVSTREAM_PARSE_FULL;
931 pes->stream_type = stream_type;
933 av_log(pes->stream, AV_LOG_DEBUG,
934 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
935 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
937 st->codecpar->codec_tag = pes->stream_type;
939 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
940 if (pes->stream_type == 4 || pes->stream_type == 0x0f)
941 sti->request_probe = 50;
942 if ((prog_reg_desc == AV_RL32("HDMV") ||
943 prog_reg_desc == AV_RL32("HDPR")) &&
944 st->codecpar->codec_id == AV_CODEC_ID_NONE) {
945 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
946 if (pes->stream_type == 0x83) {
947 // HDMV TrueHD streams also contain an AC3 coded version of the
948 // audio track - add a second stream for this
950 // priv_data cannot be shared between streams
951 PESContext *sub_pes = av_memdup(pes, sizeof(*sub_pes));
953 return AVERROR(ENOMEM);
955 sub_st = avformat_new_stream(pes->stream, NULL);
958 return AVERROR(ENOMEM);
961 sub_st->id = pes->pid;
962 avpriv_set_pts_info(sub_st, 33, 1, 90000);
963 sub_st->priv_data = sub_pes;
964 sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
965 sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
966 ffstream(sub_st)->need_parsing = AVSTREAM_PARSE_FULL;
967 sub_pes->sub_st = pes->sub_st = sub_st;
970 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
971 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
972 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
973 mpegts_find_stream_type(st, pes->stream_type, HLS_SAMPLE_ENC_types);
974 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
975 st->codecpar->codec_id = old_codec_id;
976 st->codecpar->codec_type = old_codec_type;
978 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
979 (sti->request_probe > 0 && sti->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
980 sti->probe_packets > 0 &&
981 stream_type == STREAM_TYPE_PRIVATE_DATA) {
982 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
983 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
984 sti->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
987 /* queue a context update if properties changed */
988 if (old_codec_type != st->codecpar->codec_type ||
989 old_codec_id != st->codecpar->codec_id ||
990 old_codec_tag != st->codecpar->codec_tag)
991 sti->need_context_update = 1;
996 static void reset_pes_packet_state(PESContext *pes)
998 pes->pts = AV_NOPTS_VALUE;
999 pes->dts = AV_NOPTS_VALUE;
1000 pes->data_index = 0;
1002 av_buffer_unref(&pes->buffer);
1005 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
1007 av_packet_unref(pkt);
1008 pkt->data = (uint8_t *)buffer;
1012 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
1016 av_packet_unref(pkt);
1018 pkt->buf = pes->buffer;
1019 pkt->data = pes->buffer->data;
1020 pkt->size = pes->data_index;
1022 if (pes->PES_packet_length &&
1023 pes->pes_header_size + pes->data_index != pes->PES_packet_length +
1025 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
1026 pes->flags |= AV_PKT_FLAG_CORRUPT;
1028 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1030 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
1031 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
1032 pkt->stream_index = pes->sub_st->index;
1034 pkt->stream_index = pes->st->index;
1035 pkt->pts = pes->pts;
1036 pkt->dts = pes->dts;
1037 /* store position of first TS packet of this PES packet */
1038 pkt->pos = pes->ts_packet_pos;
1039 pkt->flags = pes->flags;
1042 reset_pes_packet_state(pes);
1044 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
1046 return AVERROR(ENOMEM);
1047 *sd = pes->stream_id;
1052 static uint64_t get_ts64(GetBitContext *gb, int bits)
1054 if (get_bits_left(gb) < bits)
1055 return AV_NOPTS_VALUE;
1056 return get_bits64(gb, bits);
1059 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
1060 const uint8_t *buf, int buf_size)
1063 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1064 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1065 int dts_flag = -1, cts_flag = -1;
1066 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1067 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1068 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1070 memcpy(buf_padded, buf, buf_padded_size);
1072 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1074 if (sl->use_au_start)
1075 au_start_flag = get_bits1(&gb);
1077 au_end_flag = get_bits1(&gb);
1078 if (!sl->use_au_start && !sl->use_au_end)
1079 au_start_flag = au_end_flag = 1;
1080 if (sl->ocr_len > 0)
1081 ocr_flag = get_bits1(&gb);
1083 idle_flag = get_bits1(&gb);
1084 if (sl->use_padding)
1085 padding_flag = get_bits1(&gb);
1087 padding_bits = get_bits(&gb, 3);
1089 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1090 if (sl->packet_seq_num_len)
1091 skip_bits_long(&gb, sl->packet_seq_num_len);
1092 if (sl->degr_prior_len)
1094 skip_bits(&gb, sl->degr_prior_len);
1096 skip_bits_long(&gb, sl->ocr_len);
1097 if (au_start_flag) {
1098 if (sl->use_rand_acc_pt)
1100 if (sl->au_seq_num_len > 0)
1101 skip_bits_long(&gb, sl->au_seq_num_len);
1102 if (sl->use_timestamps) {
1103 dts_flag = get_bits1(&gb);
1104 cts_flag = get_bits1(&gb);
1107 if (sl->inst_bitrate_len)
1108 inst_bitrate_flag = get_bits1(&gb);
1110 dts = get_ts64(&gb, sl->timestamp_len);
1112 cts = get_ts64(&gb, sl->timestamp_len);
1114 skip_bits_long(&gb, sl->au_len);
1115 if (inst_bitrate_flag)
1116 skip_bits_long(&gb, sl->inst_bitrate_len);
1119 if (dts != AV_NOPTS_VALUE)
1121 if (cts != AV_NOPTS_VALUE)
1124 if (sl->timestamp_len && sl->timestamp_res)
1125 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1127 return (get_bits_count(&gb) + 7) >> 3;
1130 static AVBufferRef *buffer_pool_get(MpegTSContext *ts, int size)
1132 int index = av_log2(size + AV_INPUT_BUFFER_PADDING_SIZE);
1133 if (!ts->pools[index]) {
1134 int pool_size = FFMIN(ts->max_packet_size + AV_INPUT_BUFFER_PADDING_SIZE, 2 << index);
1135 ts->pools[index] = av_buffer_pool_init(pool_size, NULL);
1136 if (!ts->pools[index])
1139 return av_buffer_pool_get(ts->pools[index]);
1142 /* return non zero if a packet could be constructed */
1143 static int mpegts_push_data(MpegTSFilter *filter,
1144 const uint8_t *buf, int buf_size, int is_start,
1147 PESContext *pes = filter->u.pes_filter.opaque;
1148 MpegTSContext *ts = pes->ts;
1156 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1157 ret = new_pes_packet(pes, ts->pkt);
1162 reset_pes_packet_state(pes);
1164 pes->state = MPEGTS_HEADER;
1165 pes->ts_packet_pos = pos;
1168 while (buf_size > 0) {
1169 switch (pes->state) {
1171 len = PES_START_SIZE - pes->data_index;
1174 memcpy(pes->header + pes->data_index, p, len);
1175 pes->data_index += len;
1178 if (pes->data_index == PES_START_SIZE) {
1179 /* we got all the PES or section header. We can now
1181 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1182 pes->header[2] == 0x01) {
1183 /* it must be an MPEG-2 PES stream */
1184 pes->stream_id = pes->header[3];
1185 av_log(pes->stream, AV_LOG_TRACE, "pid=%x stream_id=%#x\n", pes->pid, pes->stream_id);
1187 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1189 pes->sub_st->discard == AVDISCARD_ALL)) ||
1190 pes->stream_id == STREAM_ID_PADDING_STREAM)
1193 /* stream not present in PMT */
1195 if (ts->skip_changes)
1197 if (ts->merge_pmt_versions)
1198 goto skip; /* wait for PMT to merge new stream */
1200 pes->st = avformat_new_stream(ts->stream, NULL);
1202 return AVERROR(ENOMEM);
1203 pes->st->id = pes->pid;
1204 mpegts_set_stream_info(pes->st, pes, 0, 0);
1207 pes->PES_packet_length = AV_RB16(pes->header + 4);
1208 /* NOTE: zero length means the PES size is unbounded */
1210 if (pes->stream_id != STREAM_ID_PROGRAM_STREAM_MAP &&
1211 pes->stream_id != STREAM_ID_PRIVATE_STREAM_2 &&
1212 pes->stream_id != STREAM_ID_ECM_STREAM &&
1213 pes->stream_id != STREAM_ID_EMM_STREAM &&
1214 pes->stream_id != STREAM_ID_PROGRAM_STREAM_DIRECTORY &&
1215 pes->stream_id != STREAM_ID_DSMCC_STREAM &&
1216 pes->stream_id != STREAM_ID_TYPE_E_STREAM) {
1217 FFStream *const pes_sti = ffstream(pes->st);
1218 pes->state = MPEGTS_PESHEADER;
1219 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes_sti->request_probe) {
1220 av_log(pes->stream, AV_LOG_TRACE,
1221 "pid=%x stream_type=%x probing\n",
1224 pes_sti->request_probe = 1;
1227 pes->pes_header_size = 6;
1228 pes->state = MPEGTS_PAYLOAD;
1229 pes->data_index = 0;
1232 /* otherwise, it should be a table */
1235 pes->state = MPEGTS_SKIP;
1240 /**********************************************/
1241 /* PES packing parsing */
1242 case MPEGTS_PESHEADER:
1243 len = PES_HEADER_SIZE - pes->data_index;
1245 return AVERROR_INVALIDDATA;
1248 memcpy(pes->header + pes->data_index, p, len);
1249 pes->data_index += len;
1252 if (pes->data_index == PES_HEADER_SIZE) {
1253 pes->pes_header_size = pes->header[8] + 9;
1254 pes->state = MPEGTS_PESHEADER_FILL;
1257 case MPEGTS_PESHEADER_FILL:
1258 len = pes->pes_header_size - pes->data_index;
1260 return AVERROR_INVALIDDATA;
1263 memcpy(pes->header + pes->data_index, p, len);
1264 pes->data_index += len;
1267 if (pes->data_index == pes->pes_header_size) {
1269 unsigned int flags, pes_ext, skip;
1271 flags = pes->header[7];
1272 r = pes->header + 9;
1273 pes->pts = AV_NOPTS_VALUE;
1274 pes->dts = AV_NOPTS_VALUE;
1275 if ((flags & 0xc0) == 0x80) {
1276 pes->dts = pes->pts = ff_parse_pes_pts(r);
1278 } else if ((flags & 0xc0) == 0xc0) {
1279 pes->pts = ff_parse_pes_pts(r);
1281 pes->dts = ff_parse_pes_pts(r);
1284 pes->extended_stream_id = -1;
1285 if (flags & 0x01) { /* PES extension */
1287 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1288 skip = (pes_ext >> 4) & 0xb;
1291 if ((pes_ext & 0x41) == 0x01 &&
1292 (r + 2) <= (pes->header + pes->pes_header_size)) {
1293 /* PES extension 2 */
1294 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1295 pes->extended_stream_id = r[1];
1299 /* we got the full header. We parse it and get the payload */
1300 pes->state = MPEGTS_PAYLOAD;
1301 pes->data_index = 0;
1302 if (pes->stream_type == 0x12 && buf_size > 0) {
1303 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1305 pes->pes_header_size += sl_header_bytes;
1306 p += sl_header_bytes;
1307 buf_size -= sl_header_bytes;
1309 if (pes->st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV && buf_size >= 5) {
1310 /* skip metadata access unit header */
1311 pes->pes_header_size += 5;
1315 if ( pes->ts->fix_teletext_pts
1316 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1317 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1319 AVProgram *p = NULL;
1321 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1322 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1323 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1325 AVStream *st = NULL;
1326 if (f->type == MPEGTS_PES) {
1327 PESContext *pcrpes = f->u.pes_filter.opaque;
1330 } else if (f->type == MPEGTS_PCR) {
1332 for (i = 0; i < p->nb_stream_indexes; i++) {
1333 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1334 if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1338 if (f->last_pcr != -1 && !f->discard) {
1339 // teletext packets do not always have correct timestamps,
1340 // the standard says they should be handled after 40.6 ms at most,
1341 // and the pcr error to this packet should be no more than 100 ms.
1342 // TODO: we should interpolate the PCR, not just use the last one
1343 int64_t pcr = f->last_pcr / 300;
1346 const FFStream *const sti = ffstream(st);
1347 FFStream *const pes_sti = ffstream(pes->st);
1349 pes_sti->pts_wrap_reference = sti->pts_wrap_reference;
1350 pes_sti->pts_wrap_behavior = sti->pts_wrap_behavior;
1352 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1353 pes->pts = pes->dts = pcr;
1354 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1355 pes->dts > pcr + 3654 + 9000) {
1356 pes->pts = pes->dts = pcr + 3654 + 9000;
1357 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1358 pes->dts > pcr + 10*90000) { //10sec
1359 pes->pts = pes->dts = pcr + 3654 + 9000;
1367 if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1369 av_log(pes->stream, AV_LOG_VERBOSE,
1370 "Forcing DTS/PTS to be unset for a "
1371 "non-trustworthy PES packet for PID %d as "
1372 "PCR hasn't been received yet.\n",
1374 pes->dts = pes->pts = AV_NOPTS_VALUE;
1379 case MPEGTS_PAYLOAD:
1381 int max_packet_size = ts->max_packet_size;
1382 if (pes->PES_packet_length && pes->PES_packet_length + PES_START_SIZE > pes->pes_header_size)
1383 max_packet_size = pes->PES_packet_length + PES_START_SIZE - pes->pes_header_size;
1385 if (pes->data_index > 0 &&
1386 pes->data_index + buf_size > max_packet_size) {
1387 ret = new_pes_packet(pes, ts->pkt);
1390 pes->PES_packet_length = 0;
1391 max_packet_size = ts->max_packet_size;
1393 } else if (pes->data_index == 0 &&
1394 buf_size > max_packet_size) {
1395 // pes packet size is < ts size packet and pes data is padded with 0xff
1396 // not sure if this is legal in ts but see issue #2392
1397 buf_size = max_packet_size;
1401 pes->buffer = buffer_pool_get(ts, max_packet_size);
1403 return AVERROR(ENOMEM);
1406 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1407 pes->data_index += buf_size;
1408 /* emit complete packets with known packet size
1409 * decreases demuxer delay for infrequent packets like subtitles from
1410 * a couple of seconds to milliseconds for properly muxed files. */
1411 if (!ts->stop_parse && pes->PES_packet_length &&
1412 pes->pes_header_size + pes->data_index == pes->PES_packet_length + PES_START_SIZE) {
1414 ret = new_pes_packet(pes, ts->pkt);
1415 pes->state = MPEGTS_SKIP;
1431 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1436 /* if no pid found, then add a pid context */
1437 pes = av_mallocz(sizeof(PESContext));
1441 pes->stream = ts->stream;
1443 pes->pcr_pid = pcr_pid;
1444 pes->state = MPEGTS_SKIP;
1445 pes->pts = AV_NOPTS_VALUE;
1446 pes->dts = AV_NOPTS_VALUE;
1447 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1456 typedef struct MP4DescrParseContext {
1460 Mp4Descr *active_descr;
1462 int max_descr_count;
1464 int predefined_SLConfigDescriptor_seen;
1465 } MP4DescrParseContext;
1467 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1468 const uint8_t *buf, unsigned size,
1469 Mp4Descr *descr, int max_descr_count)
1471 if (size > (1 << 30))
1472 return AVERROR_INVALIDDATA;
1474 ffio_init_read_context(&d->pb, buf, size);
1480 d->active_descr = NULL;
1481 d->max_descr_count = max_descr_count;
1486 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1488 int64_t new_off = avio_tell(pb);
1489 (*len) -= new_off - *off;
1493 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1496 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1499 int ret = parse_mp4_descr(d, off, len, 0);
1502 update_offsets(&d->pb.pub, &off, &len);
1507 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1509 AVIOContext *const pb = &d->pb.pub;
1510 avio_rb16(pb); // ID
1516 update_offsets(pb, &off, &len);
1517 return parse_mp4_descr_arr(d, off, len);
1520 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1525 id_flags = avio_rb16(&d->pb.pub);
1526 if (!(id_flags & 0x0020)) { // URL_Flag
1527 update_offsets(&d->pb.pub, &off, &len);
1528 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1534 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1536 AVIOContext *const pb = &d->pb.pub;
1540 if (d->descr_count >= d->max_descr_count)
1541 return AVERROR_INVALIDDATA;
1542 ff_mp4_parse_es_descr(pb, &es_id);
1543 d->active_descr = d->descr + (d->descr_count++);
1545 d->active_descr->es_id = es_id;
1546 update_offsets(pb, &off, &len);
1547 if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1549 update_offsets(pb, &off, &len);
1551 ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1552 d->active_descr = NULL;
1556 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1559 Mp4Descr *descr = d->active_descr;
1561 return AVERROR_INVALIDDATA;
1562 d->active_descr->dec_config_descr = av_malloc(len);
1563 if (!descr->dec_config_descr)
1564 return AVERROR(ENOMEM);
1565 descr->dec_config_descr_len = len;
1566 avio_read(&d->pb.pub, descr->dec_config_descr, len);
1570 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1572 Mp4Descr *descr = d->active_descr;
1573 AVIOContext *const pb = &d->pb.pub;
1576 return AVERROR_INVALIDDATA;
1578 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1579 descr->sl.dst = avio_r8(pb); \
1580 if (descr->sl.dst > maxv) { \
1581 descr->sl.dst = maxv; \
1582 return AVERROR_INVALIDDATA; \
1586 predefined = avio_r8(pb);
1589 int flags = avio_r8(pb);
1590 descr->sl.use_au_start = !!(flags & 0x80);
1591 descr->sl.use_au_end = !!(flags & 0x40);
1592 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1593 descr->sl.use_padding = !!(flags & 0x08);
1594 descr->sl.use_timestamps = !!(flags & 0x04);
1595 descr->sl.use_idle = !!(flags & 0x02);
1596 descr->sl.timestamp_res = avio_rb32(pb);
1598 R8_CHECK_CLIP_MAX(timestamp_len, 63);
1599 R8_CHECK_CLIP_MAX(ocr_len, 63);
1600 R8_CHECK_CLIP_MAX(au_len, 31);
1601 descr->sl.inst_bitrate_len = avio_r8(pb);
1602 lengths = avio_rb16(pb);
1603 descr->sl.degr_prior_len = lengths >> 12;
1604 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1605 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1606 } else if (!d->predefined_SLConfigDescriptor_seen){
1607 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1608 d->predefined_SLConfigDescriptor_seen = 1;
1613 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1617 AVIOContext *const pb = &d->pb.pub;
1618 int len1 = ff_mp4_read_descr(d->s, pb, &tag);
1621 update_offsets(pb, &off, &len);
1622 if (len < 0 || len1 > len || len1 <= 0) {
1623 av_log(d->s, AV_LOG_ERROR,
1624 "Tag %x length violation new length %d bytes remaining %d\n",
1626 return AVERROR_INVALIDDATA;
1629 if (d->level++ >= MAX_LEVEL) {
1630 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1631 ret = AVERROR_INVALIDDATA;
1635 if (target_tag && tag != target_tag) {
1636 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1638 ret = AVERROR_INVALIDDATA;
1644 ret = parse_MP4IODescrTag(d, off, len1);
1647 ret = parse_MP4ODescrTag(d, off, len1);
1650 ret = parse_MP4ESDescrTag(d, off, len1);
1652 case MP4DecConfigDescrTag:
1653 ret = parse_MP4DecConfigDescrTag(d, off, len1);
1656 ret = parse_MP4SLDescrTag(d, off, len1);
1663 avio_seek(pb, off + len1, SEEK_SET);
1667 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1668 Mp4Descr *descr, int *descr_count, int max_descr_count)
1670 MP4DescrParseContext d;
1673 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1677 ret = parse_mp4_descr(&d, avio_tell(&d.pb.pub), size, MP4IODescrTag);
1679 *descr_count = d.descr_count;
1683 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1684 Mp4Descr *descr, int *descr_count, int max_descr_count)
1686 MP4DescrParseContext d;
1689 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1693 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb.pub), size);
1695 *descr_count = d.descr_count;
1699 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1702 MpegTSContext *ts = filter->u.section_filter.opaque;
1703 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1705 const uint8_t *p, *p_end;
1706 int mp4_descr_count = 0;
1707 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1709 AVFormatContext *s = ts->stream;
1711 p_end = section + section_len - 4;
1713 if (parse_section_header(&h, &p, p_end) < 0)
1715 if (h.tid != M4OD_TID)
1717 if (skip_identical(&h, tssf))
1720 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1721 MAX_MP4_DESCR_COUNT);
1723 for (pid = 0; pid < NB_PID_MAX; pid++) {
1726 for (i = 0; i < mp4_descr_count; i++) {
1731 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1733 if (ts->pids[pid]->type != MPEGTS_PES) {
1734 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1737 pes = ts->pids[pid]->u.pes_filter.opaque;
1743 pes->sl = mp4_descr[i].sl;
1745 ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1746 mp4_descr[i].dec_config_descr_len);
1747 ff_mp4_read_dec_config_descr(s, st, &pb.pub);
1748 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1749 st->codecpar->extradata_size > 0)
1750 sti->need_parsing = 0;
1751 if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1752 st->codecpar->extradata_size > 0)
1753 sti->need_parsing = 0;
1755 st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1756 sti->need_context_update = 1;
1759 for (i = 0; i < mp4_descr_count; i++)
1760 av_free(mp4_descr[i].dec_config_descr);
1763 static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1766 AVProgram *prg = NULL;
1767 MpegTSContext *ts = filter->u.section_filter.opaque;
1769 int idx = ff_find_stream_index(ts->stream, filter->pid);
1774 * In case we receive an SCTE-35 packet before mpegts context is fully
1780 new_data_packet(section, section_len, ts->pkt);
1781 ts->pkt->stream_index = idx;
1782 prg = av_find_program_from_stream(ts->stream, NULL, idx);
1783 if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1784 MpegTSFilter *f = ts->pids[prg->pcr_pid];
1785 if (f && f->last_pcr != -1)
1786 ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1792 static const uint8_t opus_coupled_stream_cnt[9] = {
1793 1, 0, 1, 1, 2, 2, 2, 3, 3
1796 static const uint8_t opus_stream_cnt[9] = {
1797 1, 1, 1, 2, 2, 3, 4, 4, 5,
1800 static const uint8_t opus_channel_map[8][8] = {
1808 { 0,6,1,2,3,4,5,7 },
1811 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1812 const uint8_t **pp, const uint8_t *desc_list_end,
1813 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1816 FFStream *const sti = ffstream(st);
1817 const uint8_t *desc_end;
1818 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1822 desc_tag = get8(pp, desc_list_end);
1824 return AVERROR_INVALIDDATA;
1825 desc_len = get8(pp, desc_list_end);
1827 return AVERROR_INVALIDDATA;
1828 desc_end = *pp + desc_len;
1829 if (desc_end > desc_list_end)
1830 return AVERROR_INVALIDDATA;
1832 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1834 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) &&
1835 stream_type == STREAM_TYPE_PRIVATE_DATA)
1836 mpegts_find_stream_type(st, desc_tag, DESC_types);
1839 case VIDEO_STREAM_DESCRIPTOR:
1840 if (get8(pp, desc_end) & 0x1) {
1841 st->disposition |= AV_DISPOSITION_STILL_IMAGE;
1845 desc_es_id = get16(pp, desc_end);
1848 if (ts && ts->pids[pid])
1849 ts->pids[pid]->es_id = desc_es_id;
1850 for (i = 0; i < mp4_descr_count; i++)
1851 if (mp4_descr[i].dec_config_descr_len &&
1852 mp4_descr[i].es_id == desc_es_id) {
1854 ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1855 mp4_descr[i].dec_config_descr_len);
1856 ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
1857 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1858 st->codecpar->extradata_size > 0) {
1859 sti->need_parsing = 0;
1860 sti->need_context_update = 1;
1862 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1863 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1866 case FMC_DESCRIPTOR:
1867 if (get16(pp, desc_end) < 0)
1869 if (mp4_descr_count > 0 &&
1870 (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1871 (sti->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1872 sti->request_probe > 0) &&
1873 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1875 ffio_init_read_context(&pb, mp4_descr->dec_config_descr,
1876 mp4_descr->dec_config_descr_len);
1877 ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
1878 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1879 st->codecpar->extradata_size > 0) {
1880 sti->request_probe = sti->need_parsing = 0;
1881 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1882 sti->need_context_update = 1;
1886 case 0x56: /* DVB teletext descriptor */
1888 uint8_t *extradata = NULL;
1889 int language_count = desc_len / 5, ret;
1891 if (desc_len > 0 && desc_len % 5 != 0)
1892 return AVERROR_INVALIDDATA;
1894 if (language_count > 0) {
1895 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1896 av_assert0(language_count <= sizeof(language) / 4);
1898 if (st->codecpar->extradata == NULL) {
1899 ret = ff_alloc_extradata(st->codecpar, language_count * 2);
1904 if (st->codecpar->extradata_size < language_count * 2)
1905 return AVERROR_INVALIDDATA;
1907 extradata = st->codecpar->extradata;
1909 for (i = 0; i < language_count; i++) {
1910 language[i * 4 + 0] = get8(pp, desc_end);
1911 language[i * 4 + 1] = get8(pp, desc_end);
1912 language[i * 4 + 2] = get8(pp, desc_end);
1913 language[i * 4 + 3] = ',';
1915 memcpy(extradata, *pp, 2);
1921 language[i * 4 - 1] = 0;
1922 av_dict_set(&st->metadata, "language", language, 0);
1923 sti->need_context_update = 1;
1927 case 0x59: /* subtitling descriptor */
1929 /* 8 bytes per DVB subtitle substream data:
1930 * ISO_639_language_code (3 bytes),
1931 * subtitling_type (1 byte),
1932 * composition_page_id (2 bytes),
1933 * ancillary_page_id (2 bytes) */
1934 int language_count = desc_len / 8, ret;
1936 if (desc_len > 0 && desc_len % 8 != 0)
1937 return AVERROR_INVALIDDATA;
1939 if (language_count > 1) {
1940 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1943 if (language_count > 0) {
1946 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1947 av_assert0(language_count <= sizeof(language) / 4);
1949 if (st->codecpar->extradata == NULL) {
1950 ret = ff_alloc_extradata(st->codecpar, language_count * 5);
1955 if (st->codecpar->extradata_size < language_count * 5)
1956 return AVERROR_INVALIDDATA;
1958 extradata = st->codecpar->extradata;
1960 for (i = 0; i < language_count; i++) {
1961 language[i * 4 + 0] = get8(pp, desc_end);
1962 language[i * 4 + 1] = get8(pp, desc_end);
1963 language[i * 4 + 2] = get8(pp, desc_end);
1964 language[i * 4 + 3] = ',';
1966 /* hearing impaired subtitles detection using subtitling_type */
1968 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1969 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1970 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1971 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1972 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1973 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1974 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1978 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1979 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1985 language[i * 4 - 1] = 0;
1986 av_dict_set(&st->metadata, "language", language, 0);
1987 sti->need_context_update = 1;
1991 case ISO_639_LANGUAGE_DESCRIPTOR:
1992 for (i = 0; i + 4 <= desc_len; i += 4) {
1993 language[i + 0] = get8(pp, desc_end);
1994 language[i + 1] = get8(pp, desc_end);
1995 language[i + 2] = get8(pp, desc_end);
1996 language[i + 3] = ',';
1997 switch (get8(pp, desc_end)) {
1999 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
2002 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2005 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2006 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2010 if (i && language[0]) {
2011 language[i - 1] = 0;
2012 /* don't overwrite language, as it may already have been set by
2013 * another, more specific descriptor (e.g. supplementary audio) */
2014 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
2017 case REGISTRATION_DESCRIPTOR:
2018 st->codecpar->codec_tag = bytestream_get_le32(pp);
2019 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
2020 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) {
2021 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
2022 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
2023 sti->request_probe = 50;
2026 case 0x52: /* stream identifier descriptor */
2027 sti->stream_identifier = 1 + get8(pp, desc_end);
2029 case METADATA_DESCRIPTOR:
2030 if (get16(pp, desc_end) == 0xFFFF)
2032 if (get8(pp, desc_end) == 0xFF) {
2033 st->codecpar->codec_tag = bytestream_get_le32(pp);
2034 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2035 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
2038 case 0x7f: /* DVB extension descriptor */
2039 ext_desc_tag = get8(pp, desc_end);
2040 if (ext_desc_tag < 0)
2041 return AVERROR_INVALIDDATA;
2042 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
2043 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2044 if (!st->codecpar->extradata) {
2045 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
2046 AV_INPUT_BUFFER_PADDING_SIZE);
2047 if (!st->codecpar->extradata)
2048 return AVERROR(ENOMEM);
2050 st->codecpar->extradata_size = sizeof(opus_default_extradata);
2051 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
2053 channel_config_code = get8(pp, desc_end);
2054 if (channel_config_code < 0)
2055 return AVERROR_INVALIDDATA;
2056 if (channel_config_code <= 0x8) {
2057 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2058 AV_WL32(&st->codecpar->extradata[12], 48000);
2059 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2060 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2061 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2062 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2063 st->codecpar->extradata_size = st->codecpar->extradata[18] ? 21 + channels : 19;
2065 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2067 sti->need_parsing = AVSTREAM_PARSE_FULL;
2068 sti->need_context_update = 1;
2071 if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
2075 return AVERROR_INVALIDDATA;
2076 flags = get8(pp, desc_end);
2078 if ((flags & 0x80) == 0) /* mix_type */
2079 st->disposition |= AV_DISPOSITION_DEPENDENT;
2081 switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2083 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2084 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2087 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2090 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2094 if (flags & 0x01) { /* language_code_present */
2096 return AVERROR_INVALIDDATA;
2097 language[0] = get8(pp, desc_end);
2098 language[1] = get8(pp, desc_end);
2099 language[2] = get8(pp, desc_end);
2102 /* This language always has to override a possible
2103 * ISO 639 language descriptor language */
2105 av_dict_set(&st->metadata, "language", language, 0);
2109 case 0x6a: /* ac-3_descriptor */
2111 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2112 if (component_type_flag) {
2113 int component_type = get8(pp, desc_end);
2114 int service_type_mask = 0x38; // 0b00111000
2115 int service_type = ((component_type & service_type_mask) >> 3);
2116 if (service_type == 0x02 /* 0b010 */) {
2117 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2118 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2123 case 0x7a: /* enhanced_ac-3_descriptor */
2125 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2126 if (component_type_flag) {
2127 int component_type = get8(pp, desc_end);
2128 int service_type_mask = 0x38; // 0b00111000
2129 int service_type = ((component_type & service_type_mask) >> 3);
2130 if (service_type == 0x02 /* 0b010 */) {
2131 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2132 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2137 case 0xfd: /* ARIB data coding type descriptor */
2138 // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2140 if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2141 // This structure is defined in STD-B10, part 1, listing 5.4 and
2143 // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2144 // Component tag limits are documented in TR-B14, fascicle 2,
2145 // Vol. 3, Section 2, 4.2.8.1
2146 int actual_component_tag = sti->stream_identifier - 1;
2147 int picked_profile = AV_PROFILE_UNKNOWN;
2148 int data_component_id = get16(pp, desc_end);
2149 if (data_component_id < 0)
2150 return AVERROR_INVALIDDATA;
2152 switch (data_component_id) {
2154 // [0x30..0x37] are component tags utilized for
2155 // non-mobile captioning service ("profile A").
2156 if (actual_component_tag >= 0x30 &&
2157 actual_component_tag <= 0x37) {
2158 picked_profile = AV_PROFILE_ARIB_PROFILE_A;
2162 // component tag 0x87 signifies a mobile/partial reception
2163 // (1seg) captioning service ("profile C").
2164 if (actual_component_tag == 0x87) {
2165 picked_profile = AV_PROFILE_ARIB_PROFILE_C;
2172 if (picked_profile == AV_PROFILE_UNKNOWN)
2175 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2176 st->codecpar->codec_id = AV_CODEC_ID_ARIB_CAPTION;
2177 if (st->codecpar->profile != picked_profile) {
2178 st->codecpar->profile = picked_profile;
2179 sti->need_context_update = 1;
2181 sti->request_probe = 0;
2182 sti->need_parsing = 0;
2185 case 0xb0: /* DOVI video stream descriptor */
2188 AVDOVIDecoderConfigurationRecord *dovi;
2192 if (desc_end - *pp < 4) // (8 + 8 + 7 + 6 + 1 + 1 + 1) / 8
2193 return AVERROR_INVALIDDATA;
2195 dovi = av_dovi_alloc(&dovi_size);
2197 return AVERROR(ENOMEM);
2199 dovi->dv_version_major = get8(pp, desc_end);
2200 dovi->dv_version_minor = get8(pp, desc_end);
2201 buf = get16(pp, desc_end);
2202 dovi->dv_profile = (buf >> 9) & 0x7f; // 7 bits
2203 dovi->dv_level = (buf >> 3) & 0x3f; // 6 bits
2204 dovi->rpu_present_flag = (buf >> 2) & 0x01; // 1 bit
2205 dovi->el_present_flag = (buf >> 1) & 0x01; // 1 bit
2206 dovi->bl_present_flag = buf & 0x01; // 1 bit
2207 if (!dovi->bl_present_flag && desc_end - *pp >= 2) {
2208 buf = get16(pp, desc_end);
2209 dependency_pid = buf >> 3; // 13 bits
2211 if (desc_end - *pp >= 1) { // 8 bits
2212 buf = get8(pp, desc_end);
2213 dovi->dv_bl_signal_compatibility_id = (buf >> 4) & 0x0f; // 4 bits
2215 // 0 stands for None
2216 // Dolby Vision V1.2.93 profiles and levels
2217 dovi->dv_bl_signal_compatibility_id = 0;
2220 if (!av_packet_side_data_add(&st->codecpar->coded_side_data,
2221 &st->codecpar->nb_coded_side_data,
2222 AV_PKT_DATA_DOVI_CONF,
2223 (uint8_t *)dovi, dovi_size, 0)) {
2225 return AVERROR(ENOMEM);
2228 av_log(fc, AV_LOG_TRACE, "DOVI, version: %d.%d, profile: %d, level: %d, "
2229 "rpu flag: %d, el flag: %d, bl flag: %d, dependency_pid: %d, compatibility id: %d\n",
2230 dovi->dv_version_major, dovi->dv_version_minor,
2231 dovi->dv_profile, dovi->dv_level,
2232 dovi->rpu_present_flag,
2233 dovi->el_present_flag,
2234 dovi->bl_present_flag,
2236 dovi->dv_bl_signal_compatibility_id);
2246 static AVStream *find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid,
2247 int stream_identifier, int pmt_stream_idx, struct Program *p)
2249 AVFormatContext *s = ts->stream;
2250 AVStream *found = NULL;
2252 if (stream_identifier) { /* match based on "stream identifier descriptor" if present */
2253 for (int i = 0; i < p->nb_streams; i++) {
2254 if (p->streams[i].stream_identifier == stream_identifier)
2255 if (!found || pmt_stream_idx == i) /* fallback to idx based guess if multiple streams have the same identifier */
2256 found = s->streams[p->streams[i].idx];
2258 } else if (pmt_stream_idx < p->nb_streams) { /* match based on position within the PMT */
2259 found = s->streams[p->streams[pmt_stream_idx].idx];
2263 av_log(ts->stream, AV_LOG_VERBOSE,
2264 "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2265 av_get_media_type_string(found->codecpar->codec_type),
2266 found->index, found->id, pid);
2272 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2274 const uint8_t **pp = &p;
2275 const uint8_t *desc_list_end;
2276 const uint8_t *desc_end;
2278 int desc_len, desc_tag;
2280 desc_list_len = get16(pp, p_end);
2281 if (desc_list_len < 0)
2283 desc_list_len &= 0xfff;
2284 desc_list_end = p + desc_list_len;
2285 if (desc_list_end > p_end)
2289 desc_tag = get8(pp, desc_list_end);
2292 desc_len = get8(pp, desc_list_end);
2295 desc_end = *pp + desc_len;
2296 if (desc_end > desc_list_end)
2299 if (desc_tag == 0x52) {
2300 return get8(pp, desc_end);
2308 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2310 return !(stream_type == 0x13 ||
2311 (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
2314 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2316 MpegTSContext *ts = filter->u.section_filter.opaque;
2317 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2318 struct Program old_program;
2319 SectionHeader h1, *h = &h1;
2322 const uint8_t *p, *p_end, *desc_list_end;
2323 int program_info_length, pcr_pid, pid, stream_type;
2325 uint32_t prog_reg_desc = 0; /* registration descriptor */
2326 int stream_identifier = -1;
2327 struct Program *prg;
2329 int mp4_descr_count = 0;
2330 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2333 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2334 hex_dump_debug(ts->stream, section, section_len);
2336 p_end = section + section_len - 4;
2338 if (parse_section_header(h, &p, p_end) < 0)
2340 if (h->tid != PMT_TID)
2342 if (!h->current_next)
2344 if (skip_identical(h, tssf))
2347 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2348 h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2350 if (!ts->scan_all_pmts && ts->skip_changes)
2353 prg = get_program(ts, h->id);
2357 clear_program(&old_program);
2359 if (ts->skip_unknown_pmt && !prg)
2361 if (prg && prg->nb_pids && prg->pids[0] != ts->current_pid)
2363 if (!ts->skip_clear)
2364 clear_avprogram(ts, h->id);
2366 add_pid_to_program(prg, ts->current_pid);
2368 pcr_pid = get16(&p, p_end);
2372 add_pid_to_program(prg, pcr_pid);
2373 update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2375 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2377 program_info_length = get16(&p, p_end);
2378 if (program_info_length < 0)
2380 program_info_length &= 0xfff;
2381 while (program_info_length >= 2) {
2383 tag = get8(&p, p_end);
2384 len = get8(&p, p_end);
2386 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2388 program_info_length -= 2;
2389 if (len > program_info_length)
2390 // something else is broken, exit the program_descriptors_loop
2392 program_info_length -= len;
2393 if (tag == IOD_DESCRIPTOR) {
2394 get8(&p, p_end); // scope
2395 get8(&p, p_end); // label
2397 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2398 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2399 } else if (tag == REGISTRATION_DESCRIPTOR && len >= 4) {
2400 prog_reg_desc = bytestream_get_le32(&p);
2405 p += program_info_length;
2409 // stop parsing after pmt, we found header
2416 for (i = 0; i < MAX_STREAMS_PER_PROGRAM; i++) {
2419 stream_type = get8(&p, p_end);
2420 if (stream_type < 0)
2422 pid = get16(&p, p_end);
2426 if (pid == ts->current_pid)
2429 stream_identifier = parse_stream_identifier_desc(p, p_end) + 1;
2431 /* now create stream */
2432 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2433 pes = ts->pids[pid]->u.pes_filter.opaque;
2434 if (ts->merge_pmt_versions && !pes->st) {
2435 st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2438 pes->stream_type = stream_type;
2443 pes->st = avformat_new_stream(pes->stream, NULL);
2446 pes->st->id = pes->pid;
2449 } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2451 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2452 pes = add_pes_stream(ts, pid, pcr_pid);
2453 if (ts->merge_pmt_versions && pes && !pes->st) {
2454 st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2457 pes->stream_type = stream_type;
2461 if (pes && !pes->st) {
2462 st = avformat_new_stream(pes->stream, NULL);
2468 int idx = ff_find_stream_index(ts->stream, pid);
2470 st = ts->stream->streams[idx];
2472 if (ts->merge_pmt_versions && !st) {
2473 st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2476 st = avformat_new_stream(ts->stream, NULL);
2480 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2481 if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2482 mpegts_find_stream_type(st, stream_type, SCTE_types);
2483 mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2491 if (pes && !pes->stream_type)
2492 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2494 add_pid_to_program(prg, pid);
2496 prg->streams[i].idx = st->index;
2497 prg->streams[i].stream_identifier = stream_identifier;
2501 av_program_add_stream_index(ts->stream, h->id, st->index);
2503 desc_list_len = get16(&p, p_end);
2504 if (desc_list_len < 0)
2506 desc_list_len &= 0xfff;
2507 desc_list_end = p + desc_list_len;
2508 if (desc_list_end > p_end)
2511 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2512 desc_list_end, mp4_descr,
2513 mp4_descr_count, pid, ts) < 0)
2516 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2517 stream_type == 0x83 && pes->sub_st) {
2518 av_program_add_stream_index(ts->stream, h->id,
2519 pes->sub_st->index);
2520 pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2526 if (!ts->pids[pcr_pid])
2527 mpegts_open_pcr_filter(ts, pcr_pid);
2530 for (i = 0; i < mp4_descr_count; i++)
2531 av_free(mp4_descr[i].dec_config_descr);
2534 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2536 MpegTSContext *ts = filter->u.section_filter.opaque;
2537 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2538 SectionHeader h1, *h = &h1;
2539 const uint8_t *p, *p_end;
2544 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2545 hex_dump_debug(ts->stream, section, section_len);
2547 p_end = section + section_len - 4;
2549 if (parse_section_header(h, &p, p_end) < 0)
2551 if (h->tid != PAT_TID)
2553 if (!h->current_next)
2555 if (ts->skip_changes)
2558 if (skip_identical(h, tssf))
2560 ts->stream->ts_id = h->id;
2563 sid = get16(&p, p_end);
2566 pmt_pid = get16(&p, p_end);
2571 if (pmt_pid == ts->current_pid)
2574 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2576 if (sid == 0x0000) {
2579 MpegTSFilter *fil = ts->pids[pmt_pid];
2580 struct Program *prg;
2581 program = av_new_program(ts->stream, sid);
2583 program->program_num = sid;
2584 program->pmt_pid = pmt_pid;
2587 if ( fil->type != MPEGTS_SECTION
2588 || fil->pid != pmt_pid
2589 || fil->u.section_filter.section_cb != pmt_cb)
2590 mpegts_close_filter(ts, ts->pids[pmt_pid]);
2592 if (!ts->pids[pmt_pid])
2593 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2594 prg = add_program(ts, sid);
2596 unsigned prg_idx = prg - ts->prg;
2597 if (prg->nb_pids && prg->pids[0] != pmt_pid)
2599 add_pid_to_program(prg, pmt_pid);
2600 if (prg_idx > nb_prg)
2601 FFSWAP(struct Program, ts->prg[nb_prg], ts->prg[prg_idx]);
2602 if (prg_idx >= nb_prg)
2607 ts->nb_prg = nb_prg;
2611 for (j=0; j<ts->stream->nb_programs; j++) {
2612 for (i = 0; i < ts->nb_prg; i++)
2613 if (ts->prg[i].id == ts->stream->programs[j]->id)
2615 if (i==ts->nb_prg && !ts->skip_clear)
2616 clear_avprogram(ts, ts->stream->programs[j]->id);
2621 static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2623 MpegTSContext *ts = filter->u.section_filter.opaque;
2624 const uint8_t *p, *p_end;
2625 SectionHeader h1, *h = &h1;
2628 * Sometimes we receive EPG packets but SDT table do not have
2629 * eit_pres_following or eit_sched turned on, so we open EPG
2630 * stream directly here.
2632 if (!ts->epg_stream) {
2633 ts->epg_stream = avformat_new_stream(ts->stream, NULL);
2634 if (!ts->epg_stream)
2636 ts->epg_stream->id = EIT_PID;
2637 ts->epg_stream->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2638 ts->epg_stream->codecpar->codec_id = AV_CODEC_ID_EPG;
2641 if (ts->epg_stream->discard == AVDISCARD_ALL)
2644 p_end = section + section_len - 4;
2647 if (parse_section_header(h, &p, p_end) < 0)
2649 if (h->tid < EIT_TID || h->tid > OEITS_END_TID)
2652 av_log(ts->stream, AV_LOG_TRACE, "EIT: tid received = %.02x\n", h->tid);
2655 * Service_id 0xFFFF is reserved, it indicates that the current EIT table
2658 if (h->id == 0xFFFF) {
2659 av_log(ts->stream, AV_LOG_TRACE, "Scrambled EIT table received.\n");
2664 * In case we receive an EPG packet before mpegts context is fully
2670 new_data_packet(section, section_len, ts->pkt);
2671 ts->pkt->stream_index = ts->epg_stream->index;
2675 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2677 MpegTSContext *ts = filter->u.section_filter.opaque;
2678 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2679 SectionHeader h1, *h = &h1;
2680 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2681 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2682 char *name, *provider_name;
2684 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2685 hex_dump_debug(ts->stream, section, section_len);
2687 p_end = section + section_len - 4;
2689 if (parse_section_header(h, &p, p_end) < 0)
2691 if (h->tid != SDT_TID)
2693 if (!h->current_next)
2695 if (ts->skip_changes)
2697 if (skip_identical(h, tssf))
2700 onid = get16(&p, p_end);
2703 val = get8(&p, p_end);
2707 sid = get16(&p, p_end);
2710 val = get8(&p, p_end);
2713 desc_list_len = get16(&p, p_end);
2714 if (desc_list_len < 0)
2716 desc_list_len &= 0xfff;
2717 desc_list_end = p + desc_list_len;
2718 if (desc_list_end > p_end)
2721 desc_tag = get8(&p, desc_list_end);
2724 desc_len = get8(&p, desc_list_end);
2725 desc_end = p + desc_len;
2726 if (desc_len < 0 || desc_end > desc_list_end)
2729 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2730 desc_tag, desc_len);
2734 service_type = get8(&p, desc_end);
2735 if (service_type < 0)
2737 provider_name = getstr8(&p, desc_end);
2740 name = getstr8(&p, desc_end);
2742 AVProgram *program = av_new_program(ts->stream, sid);
2744 av_dict_set(&program->metadata, "service_name", name, 0);
2745 av_dict_set(&program->metadata, "service_provider",
2750 av_free(provider_name);
2761 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2762 const uint8_t *packet);
2764 /* handle one TS packet */
2765 static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
2768 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2769 has_adaptation, has_payload;
2770 const uint8_t *p, *p_end;
2772 pid = AV_RB16(packet + 1) & 0x1fff;
2773 is_start = packet[1] & 0x40;
2774 tss = ts->pids[pid];
2775 if (ts->auto_guess && !tss && is_start) {
2776 add_pes_stream(ts, pid, -1);
2777 tss = ts->pids[pid];
2782 tss->discard = discard_pid(ts, pid);
2785 ts->current_pid = pid;
2787 afc = (packet[3] >> 4) & 3;
2788 if (afc == 0) /* reserved value */
2790 has_adaptation = afc & 2;
2791 has_payload = afc & 1;
2792 is_discontinuity = has_adaptation &&
2793 packet[4] != 0 && /* with length > 0 */
2794 (packet[5] & 0x80); /* and discontinuity indicated */
2796 /* continuity check (currently not used) */
2797 cc = (packet[3] & 0xf);
2798 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2799 cc_ok = pid == 0x1FFF || // null packet PID
2806 av_log(ts->stream, AV_LOG_DEBUG,
2807 "Continuity check failed for pid %d expected %d got %d\n",
2808 pid, expected_cc, cc);
2809 if (tss->type == MPEGTS_PES) {
2810 PESContext *pc = tss->u.pes_filter.opaque;
2811 pc->flags |= AV_PKT_FLAG_CORRUPT;
2815 if (packet[1] & 0x80) {
2816 av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2817 if (tss->type == MPEGTS_PES) {
2818 PESContext *pc = tss->u.pes_filter.opaque;
2819 pc->flags |= AV_PKT_FLAG_CORRUPT;
2824 if (has_adaptation) {
2827 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2828 tss->last_pcr = pcr_h * 300 + pcr_l;
2829 /* skip adaptation field */
2832 /* if past the end of packet, ignore */
2833 p_end = packet + TS_PACKET_SIZE;
2834 if (p >= p_end || !has_payload)
2838 av_assert0(pos >= TS_PACKET_SIZE);
2839 ts->pos47_full = pos - TS_PACKET_SIZE;
2842 if (tss->type == MPEGTS_SECTION) {
2844 /* pointer field present */
2846 if (len > p_end - p)
2849 /* write remaining section bytes */
2850 write_section_data(ts, tss,
2852 /* check whether filter has been closed */
2858 write_section_data(ts, tss,
2863 write_section_data(ts, tss,
2868 // stop find_stream_info from waiting for more streams
2869 // when all programs have received a PMT
2870 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2872 for (i = 0; i < ts->nb_prg; i++) {
2873 if (!ts->prg[i].pmt_found)
2876 if (i == ts->nb_prg && ts->nb_prg > 0) {
2877 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2878 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2884 // Note: The position here points actually behind the current packet.
2885 if (tss->type == MPEGTS_PES) {
2886 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2887 pos - ts->raw_packet_size)) < 0)
2895 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2897 MpegTSContext *ts = s->priv_data;
2898 AVIOContext *pb = s->pb;
2900 uint64_t pos = avio_tell(pb);
2901 int64_t back = FFMIN(seekback, pos);
2903 //Special case for files like 01c56b0dc1.ts
2904 if (current_packet[0] == 0x80 && current_packet[12] == 0x47 && pos >= TS_PACKET_SIZE) {
2905 avio_seek(pb, 12 - TS_PACKET_SIZE, SEEK_CUR);
2909 avio_seek(pb, -back, SEEK_CUR);
2911 for (i = 0; i < ts->resync_size; i++) {
2916 int new_packet_size, ret;
2917 avio_seek(pb, -1, SEEK_CUR);
2918 pos = avio_tell(pb);
2919 ret = ffio_ensure_seekback(pb, PROBE_PACKET_MAX_BUF);
2922 new_packet_size = get_packet_size(s);
2923 if (new_packet_size > 0 && new_packet_size != ts->raw_packet_size) {
2924 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", new_packet_size);
2925 ts->raw_packet_size = new_packet_size;
2927 avio_seek(pb, pos, SEEK_SET);
2931 av_log(s, AV_LOG_ERROR,
2932 "max resync size reached, could not find sync byte\n");
2934 return AVERROR_INVALIDDATA;
2937 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2938 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2939 const uint8_t **data)
2941 AVIOContext *pb = s->pb;
2945 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2946 if (len != TS_PACKET_SIZE)
2947 return len < 0 ? len : AVERROR_EOF;
2948 /* check packet sync byte */
2949 if ((*data)[0] != 0x47) {
2950 /* find a new packet start */
2952 if (mpegts_resync(s, raw_packet_size, *data) < 0)
2953 return AVERROR(EAGAIN);
2963 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2965 AVIOContext *pb = s->pb;
2966 int skip = raw_packet_size - TS_PACKET_SIZE;
2968 avio_skip(pb, skip);
2971 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2973 AVFormatContext *s = ts->stream;
2974 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2975 const uint8_t *data;
2979 if (avio_tell(s->pb) != ts->last_pos) {
2981 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2982 /* seek detected, flush pes buffer */
2983 for (i = 0; i < NB_PID_MAX; i++) {
2985 if (ts->pids[i]->type == MPEGTS_PES) {
2986 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2987 av_buffer_unref(&pes->buffer);
2988 pes->data_index = 0;
2989 pes->state = MPEGTS_SKIP; /* skip until pes header */
2990 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2991 ts->pids[i]->u.section_filter.last_ver = -1;
2993 ts->pids[i]->last_cc = -1;
2994 ts->pids[i]->last_pcr = -1;
3001 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3004 if (nb_packets != 0 && packet_num >= nb_packets ||
3005 ts->stop_parse > 1) {
3006 ret = AVERROR(EAGAIN);
3009 if (ts->stop_parse > 0)
3012 ret = read_packet(s, packet, ts->raw_packet_size, &data);
3015 ret = handle_packet(ts, data, avio_tell(s->pb));
3016 finished_reading_packet(s, ts->raw_packet_size);
3020 ts->last_pos = avio_tell(s->pb);
3024 static int mpegts_probe(const AVProbeData *p)
3026 const int size = p->buf_size;
3030 int check_count = size / TS_FEC_PACKET_SIZE;
3031 #define CHECK_COUNT 10
3032 #define CHECK_BLOCK 100
3037 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
3038 int left = FFMIN(check_count - i, CHECK_BLOCK);
3039 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
3040 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
3041 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
3042 score = FFMAX3(score, dvhs_score, fec_score);
3044 maxscore = FFMAX(maxscore, score);
3047 sumscore = sumscore * CHECK_COUNT / check_count;
3048 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
3050 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
3052 if (check_count > CHECK_COUNT && sumscore > 6) {
3053 return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
3054 } else if (check_count >= CHECK_COUNT && sumscore > 6) {
3055 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3056 } else if (check_count >= CHECK_COUNT && maxscore > 6) {
3057 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3058 } else if (sumscore > 6) {
3065 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
3066 * (-1) if not available */
3067 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
3069 int afc, len, flags;
3073 afc = (packet[3] >> 4) & 3;
3075 return AVERROR_INVALIDDATA;
3080 return AVERROR_INVALIDDATA;
3083 if (!(flags & 0x10))
3084 return AVERROR_INVALIDDATA;
3086 return AVERROR_INVALIDDATA;
3088 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
3089 *ppcr_low = ((p[4] & 1) << 8) | p[5];
3093 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
3095 /* NOTE: We attempt to seek on non-seekable files as well, as the
3096 * probe buffer usually is big enough. Only warn if the seek failed
3097 * on files where the seek should work. */
3098 if (avio_seek(pb, pos, SEEK_SET) < 0)
3099 av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
3102 static int mpegts_read_header(AVFormatContext *s)
3104 MpegTSContext *ts = s->priv_data;
3105 AVIOContext *pb = s->pb;
3106 int64_t pos, probesize = s->probesize;
3107 int64_t seekback = FFMAX(s->probesize, (int64_t)ts->resync_size + PROBE_PACKET_MAX_BUF);
3109 ffformatcontext(s)->prefer_codec_framerate = 1;
3111 if (ffio_ensure_seekback(pb, seekback) < 0)
3112 av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
3114 pos = avio_tell(pb);
3115 ts->raw_packet_size = get_packet_size(s);
3116 if (ts->raw_packet_size <= 0) {
3117 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
3118 ts->raw_packet_size = TS_PACKET_SIZE;
3123 if (s->iformat == &ff_mpegts_demuxer) {
3126 /* first do a scan to get all the services */
3127 seek_back(s, pb, pos);
3129 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3130 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3131 mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
3133 handle_packets(ts, probesize / ts->raw_packet_size);
3134 /* if could not find service, enable auto_guess */
3138 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
3140 s->ctx_flags |= AVFMTCTX_NOHEADER;
3143 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
3144 int64_t pcrs[2], pcr_h;
3145 uint8_t packet[TS_PACKET_SIZE];
3146 const uint8_t *data;
3148 /* only read packets */
3150 st = avformat_new_stream(s, NULL);
3152 return AVERROR(ENOMEM);
3153 avpriv_set_pts_info(st, 60, 1, 27000000);
3154 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
3155 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
3157 /* we iterate until we find two PCRs to estimate the bitrate */
3162 ret = read_packet(s, packet, ts->raw_packet_size, &data);
3165 pid = AV_RB16(data + 1) & 0x1fff;
3166 if ((pcr_pid == -1 || pcr_pid == pid) &&
3167 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
3168 finished_reading_packet(s, ts->raw_packet_size);
3170 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
3173 if (pcrs[1] - pcrs[0] > 0) {
3174 /* the difference needs to be positive to make sense for bitrate computation */
3177 av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
3183 finished_reading_packet(s, ts->raw_packet_size);
3188 /* NOTE1: the bitrate is computed without the FEC */
3189 /* NOTE2: it is only the bitrate of the start of the stream */
3190 ts->pcr_incr = pcrs[1] - pcrs[0];
3191 ts->cur_pcr = pcrs[0] - ts->pcr_incr * (nb_packets - 1);
3192 s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
3193 st->codecpar->bit_rate = s->bit_rate;
3194 st->start_time = ts->cur_pcr;
3195 av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%"PRId64"\n",
3196 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
3199 seek_back(s, pb, pos);
3203 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
3205 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
3207 MpegTSContext *ts = s->priv_data;
3209 int64_t pcr_h, next_pcr_h, pos;
3210 int pcr_l, next_pcr_l;
3211 uint8_t pcr_buf[12];
3212 const uint8_t *data;
3214 if ((ret = av_new_packet(pkt, TS_PACKET_SIZE)) < 0)
3216 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
3217 pkt->pos = avio_tell(s->pb);
3221 if (data != pkt->data)
3222 memcpy(pkt->data, data, TS_PACKET_SIZE);
3223 finished_reading_packet(s, ts->raw_packet_size);
3224 if (ts->mpeg2ts_compute_pcr) {
3225 /* compute exact PCR for each packet */
3226 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
3227 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
3228 pos = avio_tell(s->pb);
3229 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
3230 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
3231 avio_read(s->pb, pcr_buf, 12);
3232 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
3233 /* XXX: not precise enough */
3235 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
3240 avio_seek(s->pb, pos, SEEK_SET);
3241 /* no next PCR found: we use previous increment */
3242 ts->cur_pcr = pcr_h * 300 + pcr_l;
3244 pkt->pts = ts->cur_pcr;
3245 pkt->duration = ts->pcr_incr;
3246 ts->cur_pcr += ts->pcr_incr;
3248 pkt->stream_index = 0;
3252 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
3254 MpegTSContext *ts = s->priv_data;
3259 ret = handle_packets(ts, 0);
3261 av_packet_unref(ts->pkt);
3262 /* flush pes data left */
3263 for (i = 0; i < NB_PID_MAX; i++)
3264 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
3265 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3266 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
3267 ret = new_pes_packet(pes, pkt);
3270 pes->state = MPEGTS_SKIP;
3277 if (!ret && pkt->size < 0)
3278 ret = AVERROR_INVALIDDATA;
3282 static void mpegts_free(MpegTSContext *ts)
3288 for (i = 0; i < FF_ARRAY_ELEMS(ts->pools); i++)
3289 av_buffer_pool_uninit(&ts->pools[i]);
3291 for (i = 0; i < NB_PID_MAX; i++)
3293 mpegts_close_filter(ts, ts->pids[i]);
3296 static int mpegts_read_close(AVFormatContext *s)
3298 MpegTSContext *ts = s->priv_data;
3303 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3304 int64_t *ppos, int64_t pos_limit)
3306 MpegTSContext *ts = s->priv_data;
3307 int64_t pos, timestamp;
3308 uint8_t buf[TS_PACKET_SIZE];
3309 int pcr_l, pcr_pid =
3310 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3311 int pos47 = ts->pos47_full % ts->raw_packet_size;
3313 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3314 ts->raw_packet_size + pos47;
3315 while(pos < pos_limit) {
3316 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3317 return AV_NOPTS_VALUE;
3318 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3319 return AV_NOPTS_VALUE;
3320 if (buf[0] != 0x47) {
3321 if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3322 return AV_NOPTS_VALUE;
3323 pos = avio_tell(s->pb);
3326 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3327 parse_pcr(×tamp, &pcr_l, buf) == 0) {
3331 pos += ts->raw_packet_size;
3334 return AV_NOPTS_VALUE;
3337 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3338 int64_t *ppos, int64_t pos_limit)
3340 MpegTSContext *ts = s->priv_data;
3343 int pos47 = ts->pos47_full % ts->raw_packet_size;
3344 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3345 ff_read_frame_flush(s);
3346 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3347 return AV_NOPTS_VALUE;
3348 pkt = av_packet_alloc();
3350 return AV_NOPTS_VALUE;
3351 while(pos < pos_limit) {
3352 int ret = av_read_frame(s, pkt);
3354 av_packet_free(&pkt);
3355 return AV_NOPTS_VALUE;
3357 if (pkt->dts != AV_NOPTS_VALUE && pkt->pos >= 0) {
3358 ff_reduce_index(s, pkt->stream_index);
3359 av_add_index_entry(s->streams[pkt->stream_index], pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3360 if (pkt->stream_index == stream_index && pkt->pos >= *ppos) {
3361 int64_t dts = pkt->dts;
3363 av_packet_free(&pkt);
3368 av_packet_unref(pkt);
3371 av_packet_free(&pkt);
3372 return AV_NOPTS_VALUE;
3375 /**************************************************************/
3376 /* parsing functions - called from other demuxers such as RTP */
3378 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
3382 ts = av_mallocz(sizeof(MpegTSContext));
3385 /* no stream case, currently used by RTP */
3386 ts->raw_packet_size = TS_PACKET_SIZE;
3387 ts->max_packet_size = 2048000;
3391 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3392 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3393 mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
3398 /* return the consumed length if a packet was output, or -1 if no
3399 * packet is output */
3400 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
3401 const uint8_t *buf, int len)
3409 if (len < TS_PACKET_SIZE)
3410 return AVERROR_INVALIDDATA;
3411 if (buf[0] != 0x47) {
3415 handle_packet(ts, buf, len1 - len + TS_PACKET_SIZE);
3416 buf += TS_PACKET_SIZE;
3417 len -= TS_PACKET_SIZE;
3418 if (ts->stop_parse == 1)
3425 void avpriv_mpegts_parse_close(MpegTSContext *ts)
3431 const AVInputFormat ff_mpegts_demuxer = {
3433 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3434 .priv_data_size = sizeof(MpegTSContext),
3435 .read_probe = mpegts_probe,
3436 .read_header = mpegts_read_header,
3437 .read_packet = mpegts_read_packet,
3438 .read_close = mpegts_read_close,
3439 .read_timestamp = mpegts_get_dts,
3440 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3441 .priv_class = &mpegts_class,
3444 const AVInputFormat ff_mpegtsraw_demuxer = {
3445 .name = "mpegtsraw",
3446 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3447 .priv_data_size = sizeof(MpegTSContext),
3448 .read_header = mpegts_read_header,
3449 .read_packet = mpegts_raw_read_packet,
3450 .read_close = mpegts_read_close,
3451 .read_timestamp = mpegts_get_dts,
3452 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3453 .priv_class = &mpegtsraw_class,