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/common.h"
24 #include "libavutil/crc.h"
25 #include "libavutil/internal.h"
26 #include "libavutil/intreadwrite.h"
27 #include "libavutil/log.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/mathematics.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/dovi_meta.h"
33 #include "libavcodec/bytestream.h"
34 #include "libavcodec/get_bits.h"
35 #include "libavcodec/opus.h"
39 #include "avio_internal.h"
46 /* maximum size in which we look for synchronization if
47 * synchronization is lost */
48 #define MAX_RESYNC_SIZE 65536
50 #define MAX_PES_PAYLOAD 200 * 1024
52 #define MAX_MP4_DESCR_COUNT 16
54 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
56 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
57 (modulus) = (dividend) % (divisor); \
58 (prev_dividend) = (dividend); \
61 #define PROBE_PACKET_MAX_BUF 8192
62 #define PROBE_PACKET_MARGIN 5
64 enum MpegTSFilterType {
70 typedef struct MpegTSFilter MpegTSFilter;
72 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
73 int is_start, int64_t pos);
75 typedef struct MpegTSPESFilter {
80 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
82 typedef void SetServiceCallback (void *opaque, int ret);
84 typedef struct MpegTSSectionFilter {
91 unsigned int check_crc : 1;
92 unsigned int end_of_section_reached : 1;
93 SectionCallback *section_cb;
95 } MpegTSSectionFilter;
100 int last_cc; /* last cc code (-1 if first packet) */
103 enum MpegTSFilterType type;
105 MpegTSPESFilter pes_filter;
106 MpegTSSectionFilter section_filter;
110 #define MAX_PIDS_PER_PROGRAM 64
112 unsigned int id; // program id/service id
113 unsigned int nb_pids;
114 unsigned int pids[MAX_PIDS_PER_PROGRAM];
116 /** have we found pmt for this program */
120 struct MpegTSContext {
121 const AVClass *class;
123 AVFormatContext *stream;
124 /** raw packet size, including FEC if present */
129 /** if true, all pids are analyzed to find streams */
132 /** compute exact PCR for each transport stream packet */
133 int mpeg2ts_compute_pcr;
135 /** fix dvb teletext pts */
136 int fix_teletext_pts;
138 int64_t cur_pcr; /**< used to estimate the exact PCR */
139 int64_t pcr_incr; /**< used to estimate the exact PCR */
141 /* data needed to handle file based ts */
142 /** stop parsing loop */
144 /** packet containing Audio/Video data */
146 /** to detect seek */
151 int skip_unknown_pmt;
156 int merge_pmt_versions;
158 /******************************************/
159 /* private mpegts data */
161 /** structure to keep track of Program->pids mapping */
165 int8_t crc_validity[NB_PID_MAX];
166 /** filters for various streams specified by PMT + for the PAT and PMT */
167 MpegTSFilter *pids[NB_PID_MAX];
170 AVStream *epg_stream;
171 AVBufferPool* pools[32];
174 #define MPEGTS_OPTIONS \
175 { "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 }
177 static const AVOption options[] = {
179 {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
180 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
181 {"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
182 {.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
183 {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
184 {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
185 {"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
186 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
187 {"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
188 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
189 {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
190 {.i64 = 0}, 0, 1, 0 },
191 {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
192 {.i64 = 0}, 0, 1, 0 },
196 static const AVClass mpegts_class = {
197 .class_name = "mpegts demuxer",
198 .item_name = av_default_item_name,
200 .version = LIBAVUTIL_VERSION_INT,
203 static const AVOption raw_options[] = {
205 { "compute_pcr", "compute exact PCR for each transport stream packet",
206 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
207 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
208 { "ts_packetsize", "output option carrying the raw packet size",
209 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
211 AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
215 static const AVClass mpegtsraw_class = {
216 .class_name = "mpegtsraw demuxer",
217 .item_name = av_default_item_name,
218 .option = raw_options,
219 .version = LIBAVUTIL_VERSION_INT,
222 /* TS stream handling */
227 MPEGTS_PESHEADER_FILL,
232 /* enough for PES header + length */
233 #define PES_START_SIZE 6
234 #define PES_HEADER_SIZE 9
235 #define MAX_PES_HEADER_SIZE (9 + 255)
237 typedef struct PESContext {
239 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
242 AVFormatContext *stream;
244 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
245 enum MpegTSState state;
246 /* used to get the format */
248 int flags; /**< copied to the AVPacket flags */
251 int extended_stream_id;
254 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
255 uint8_t header[MAX_PES_HEADER_SIZE];
261 extern AVInputFormat ff_mpegts_demuxer;
263 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
266 for (i = 0; i < ts->nb_prg; i++) {
267 if (ts->prg[i].id == programid) {
274 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
276 AVProgram *prg = NULL;
279 for (i = 0; i < ts->stream->nb_programs; i++)
280 if (ts->stream->programs[i]->id == programid) {
281 prg = ts->stream->programs[i];
286 prg->nb_stream_indexes = 0;
289 static void clear_program(struct Program *p)
297 static void clear_programs(MpegTSContext *ts)
303 static struct Program * add_program(MpegTSContext *ts, unsigned int programid)
305 struct Program *p = get_program(ts, programid);
308 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
312 p = &ts->prg[ts->nb_prg];
319 static void add_pid_to_program(struct Program *p, unsigned int pid)
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 update_av_program_info(AVFormatContext *s, unsigned int programid,
336 unsigned int pid, int version)
339 for (i = 0; i < s->nb_programs; i++) {
340 AVProgram *program = s->programs[i];
341 if (program->id == programid) {
342 int old_pcr_pid = program->pcr_pid,
343 old_version = program->pmt_version;
344 program->pcr_pid = pid;
345 program->pmt_version = version;
347 if (old_version != -1 && old_version != version) {
348 av_log(s, AV_LOG_VERBOSE,
349 "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
350 programid, old_version, version, old_pcr_pid, pid);
358 * @brief discard_pid() decides if the pid is to be discarded according
359 * to caller's programs selection
360 * @param ts : - TS context
362 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
365 static int discard_pid(MpegTSContext *ts, unsigned int pid)
368 int used = 0, discarded = 0;
374 /* If none of the programs have .discard=AVDISCARD_ALL then there's
375 * no way we have to discard this packet */
376 for (k = 0; k < ts->stream->nb_programs; k++)
377 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
379 if (k == ts->stream->nb_programs)
382 for (i = 0; i < ts->nb_prg; i++) {
384 for (j = 0; j < p->nb_pids; j++) {
385 if (p->pids[j] != pid)
387 // is program with id p->id set to be discarded?
388 for (k = 0; k < ts->stream->nb_programs; k++) {
389 if (ts->stream->programs[k]->id == p->id) {
390 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
399 return !used && discarded;
403 * Assemble PES packets out of TS packets, and then call the "section_cb"
404 * function when they are complete.
406 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
407 const uint8_t *buf, int buf_size, int is_start)
409 MpegTSSectionFilter *tss = &tss1->u.section_filter;
410 uint8_t *cur_section_buf = NULL;
414 memcpy(tss->section_buf, buf, buf_size);
415 tss->section_index = buf_size;
416 tss->section_h_size = -1;
417 tss->end_of_section_reached = 0;
419 if (tss->end_of_section_reached)
421 len = MAX_SECTION_SIZE - tss->section_index;
424 memcpy(tss->section_buf + tss->section_index, buf, len);
425 tss->section_index += len;
429 cur_section_buf = tss->section_buf;
430 while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
431 /* compute section length if possible */
432 if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
433 len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
434 if (len > MAX_SECTION_SIZE)
436 tss->section_h_size = len;
439 if (tss->section_h_size != -1 &&
440 tss->section_index >= offset + tss->section_h_size) {
442 tss->end_of_section_reached = 1;
444 if (tss->check_crc) {
445 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
446 if (tss->section_h_size >= 4)
447 tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
450 ts->crc_validity[ tss1->pid ] = 100;
451 }else if (ts->crc_validity[ tss1->pid ] > -10) {
452 ts->crc_validity[ tss1->pid ]--;
457 tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
462 cur_section_buf += tss->section_h_size;
463 offset += tss->section_h_size;
464 tss->section_h_size = -1;
466 tss->section_h_size = -1;
467 tss->end_of_section_reached = 0;
473 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
474 enum MpegTSFilterType type)
476 MpegTSFilter *filter;
478 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
480 if (pid >= NB_PID_MAX || ts->pids[pid])
482 filter = av_mallocz(sizeof(MpegTSFilter));
485 ts->pids[pid] = filter;
490 filter->last_cc = -1;
491 filter->last_pcr= -1;
496 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
498 SectionCallback *section_cb,
502 MpegTSFilter *filter;
503 MpegTSSectionFilter *sec;
504 uint8_t *section_buf = av_mallocz(MAX_SECTION_SIZE);
509 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION))) {
510 av_free(section_buf);
513 sec = &filter->u.section_filter;
514 sec->section_cb = section_cb;
515 sec->opaque = opaque;
516 sec->section_buf = section_buf;
517 sec->check_crc = check_crc;
523 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
527 MpegTSFilter *filter;
528 MpegTSPESFilter *pes;
530 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
533 pes = &filter->u.pes_filter;
534 pes->pes_cb = pes_cb;
535 pes->opaque = opaque;
539 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
541 return mpegts_open_filter(ts, pid, MPEGTS_PCR);
544 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
549 if (filter->type == MPEGTS_SECTION)
550 av_freep(&filter->u.section_filter.section_buf);
551 else if (filter->type == MPEGTS_PES) {
552 PESContext *pes = filter->u.pes_filter.opaque;
553 av_buffer_unref(&pes->buffer);
554 /* referenced private data will be freed later in
555 * avformat_close_input (pes->st->priv_data == pes) */
556 if (!pes->st || pes->merged_st) {
557 av_freep(&filter->u.pes_filter.opaque);
562 ts->pids[pid] = NULL;
565 static int analyze(const uint8_t *buf, int size, int packet_size,
568 int stat[TS_MAX_PACKET_SIZE];
573 memset(stat, 0, packet_size * sizeof(*stat));
575 for (i = 0; i < size - 3; i++) {
576 if (buf[i] == 0x47) {
577 int pid = AV_RB16(buf+1) & 0x1FFF;
578 int asc = buf[i + 3] & 0x30;
579 if (!probe || pid == 0x1FFF || asc) {
580 int x = i % packet_size;
583 if (stat[x] > best_score) {
584 best_score = stat[x];
590 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
593 /* autodetect fec presence */
594 static int get_packet_size(AVFormatContext* s)
596 int score, fec_score, dvhs_score;
600 /*init buffer to store stream for probing */
601 uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
603 int max_iterations = 16;
605 while (buf_size < PROBE_PACKET_MAX_BUF && max_iterations--) {
606 ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
608 return AVERROR_INVALIDDATA;
611 score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
612 dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
613 fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
614 av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
615 buf_size, score, dvhs_score, fec_score);
617 margin = mid_pred(score, fec_score, dvhs_score);
619 if (buf_size < PROBE_PACKET_MAX_BUF)
620 margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
623 return TS_PACKET_SIZE;
624 else if (dvhs_score > margin)
625 return TS_DVHS_PACKET_SIZE;
626 else if (fec_score > margin)
627 return TS_FEC_PACKET_SIZE;
629 return AVERROR_INVALIDDATA;
632 typedef struct SectionHeader {
637 uint8_t last_sec_num;
640 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
642 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
645 tssf->last_ver = h->version;
646 tssf->last_crc = tssf->crc;
651 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
658 return AVERROR_INVALIDDATA;
664 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
671 return AVERROR_INVALIDDATA;
678 /* read and allocate a DVB string preceded by its length */
679 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
686 len = get8(&p, p_end);
693 const char *encodings[] = {
694 "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
695 "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
696 "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
697 "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
698 "", "", "", "", "", "", "", ""
702 size_t inlen = len, outlen = inlen * 6 + 1;
703 if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
705 snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
708 cd = iconv_open("UTF-8", iso8859);
709 } else if (p[0] < 0x20) {
712 cd = iconv_open("UTF-8", encodings[*p]);
715 cd = iconv_open("UTF-8", encodings[0]);
717 if (cd == (iconv_t)-1)
719 str = out = av_malloc(outlen);
724 if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
736 str = av_malloc(len + 1);
746 static int parse_section_header(SectionHeader *h,
747 const uint8_t **pp, const uint8_t *p_end)
751 val = get8(pp, p_end);
756 val = get16(pp, p_end);
760 val = get8(pp, p_end);
763 h->version = (val >> 1) & 0x1f;
764 val = get8(pp, p_end);
768 val = get8(pp, p_end);
771 h->last_sec_num = val;
775 typedef struct StreamType {
776 uint32_t stream_type;
777 enum AVMediaType codec_type;
778 enum AVCodecID codec_id;
781 static const StreamType ISO_types[] = {
782 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
783 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
784 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
785 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
786 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
787 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
788 /* Makito encoder sets stream type 0x11 for AAC,
789 * so auto-detect LOAS/LATM instead of hardcoding it. */
790 #if !CONFIG_LOAS_DEMUXER
791 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
793 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
794 { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
795 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
796 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
797 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
798 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
799 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
800 { 0xd2, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS2 },
801 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
805 static const StreamType HDMV_types[] = {
806 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
807 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
808 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
809 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
810 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
811 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
812 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
813 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
814 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
815 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
816 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
821 static const StreamType SCTE_types[] = {
822 { 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
827 static const StreamType MISC_types[] = {
828 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
829 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
833 static const StreamType REGD_types[] = {
834 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
835 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
836 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
837 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
838 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
839 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
840 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
841 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
842 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
843 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
844 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
845 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
849 static const StreamType METADATA_types[] = {
850 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
851 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
855 /* descriptor present */
856 static const StreamType DESC_types[] = {
857 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
858 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
859 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
860 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
861 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
865 static void mpegts_find_stream_type(AVStream *st,
866 uint32_t stream_type,
867 const StreamType *types)
869 for (; types->stream_type; types++)
870 if (stream_type == types->stream_type) {
871 if (st->codecpar->codec_type != types->codec_type ||
872 st->codecpar->codec_id != types->codec_id) {
873 st->codecpar->codec_type = types->codec_type;
874 st->codecpar->codec_id = types->codec_id;
875 st->internal->need_context_update = 1;
877 st->internal->request_probe = 0;
882 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
883 uint32_t stream_type, uint32_t prog_reg_desc)
885 int old_codec_type = st->codecpar->codec_type;
886 int old_codec_id = st->codecpar->codec_id;
887 int old_codec_tag = st->codecpar->codec_tag;
889 if (avcodec_is_open(st->internal->avctx)) {
890 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
894 avpriv_set_pts_info(st, 33, 1, 90000);
896 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
897 st->codecpar->codec_id = AV_CODEC_ID_NONE;
898 st->need_parsing = AVSTREAM_PARSE_FULL;
900 pes->stream_type = stream_type;
902 av_log(pes->stream, AV_LOG_DEBUG,
903 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
904 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
906 st->codecpar->codec_tag = pes->stream_type;
908 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
909 if (pes->stream_type == 4 || pes->stream_type == 0x0f)
910 st->internal->request_probe = 50;
911 if ((prog_reg_desc == AV_RL32("HDMV") ||
912 prog_reg_desc == AV_RL32("HDPR")) &&
913 st->codecpar->codec_id == AV_CODEC_ID_NONE) {
914 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
915 if (pes->stream_type == 0x83) {
916 // HDMV TrueHD streams also contain an AC3 coded version of the
917 // audio track - add a second stream for this
919 // priv_data cannot be shared between streams
920 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
922 return AVERROR(ENOMEM);
923 memcpy(sub_pes, pes, sizeof(*sub_pes));
925 sub_st = avformat_new_stream(pes->stream, NULL);
928 return AVERROR(ENOMEM);
931 sub_st->id = pes->pid;
932 avpriv_set_pts_info(sub_st, 33, 1, 90000);
933 sub_st->priv_data = sub_pes;
934 sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
935 sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
936 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
937 sub_pes->sub_st = pes->sub_st = sub_st;
940 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
941 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
942 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
943 st->codecpar->codec_id = old_codec_id;
944 st->codecpar->codec_type = old_codec_type;
946 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
947 (st->internal->request_probe > 0 && st->internal->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
948 st->probe_packets > 0 &&
949 stream_type == STREAM_TYPE_PRIVATE_DATA) {
950 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
951 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
952 st->internal->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
955 /* queue a context update if properties changed */
956 if (old_codec_type != st->codecpar->codec_type ||
957 old_codec_id != st->codecpar->codec_id ||
958 old_codec_tag != st->codecpar->codec_tag)
959 st->internal->need_context_update = 1;
964 static void reset_pes_packet_state(PESContext *pes)
966 pes->pts = AV_NOPTS_VALUE;
967 pes->dts = AV_NOPTS_VALUE;
970 av_buffer_unref(&pes->buffer);
973 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
976 pkt->data = (uint8_t *)buffer;
980 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
986 pkt->buf = pes->buffer;
987 pkt->data = pes->buffer->data;
988 pkt->size = pes->data_index;
990 if (pes->total_size != MAX_PES_PAYLOAD &&
991 pes->pes_header_size + pes->data_index != pes->total_size +
993 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
994 pes->flags |= AV_PKT_FLAG_CORRUPT;
996 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
998 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
999 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
1000 pkt->stream_index = pes->sub_st->index;
1002 pkt->stream_index = pes->st->index;
1003 pkt->pts = pes->pts;
1004 pkt->dts = pes->dts;
1005 /* store position of first TS packet of this PES packet */
1006 pkt->pos = pes->ts_packet_pos;
1007 pkt->flags = pes->flags;
1010 reset_pes_packet_state(pes);
1012 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
1014 return AVERROR(ENOMEM);
1015 *sd = pes->stream_id;
1020 static uint64_t get_ts64(GetBitContext *gb, int bits)
1022 if (get_bits_left(gb) < bits)
1023 return AV_NOPTS_VALUE;
1024 return get_bits64(gb, bits);
1027 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
1028 const uint8_t *buf, int buf_size)
1031 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1032 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1033 int dts_flag = -1, cts_flag = -1;
1034 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1035 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1036 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1038 memcpy(buf_padded, buf, buf_padded_size);
1040 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1042 if (sl->use_au_start)
1043 au_start_flag = get_bits1(&gb);
1045 au_end_flag = get_bits1(&gb);
1046 if (!sl->use_au_start && !sl->use_au_end)
1047 au_start_flag = au_end_flag = 1;
1048 if (sl->ocr_len > 0)
1049 ocr_flag = get_bits1(&gb);
1051 idle_flag = get_bits1(&gb);
1052 if (sl->use_padding)
1053 padding_flag = get_bits1(&gb);
1055 padding_bits = get_bits(&gb, 3);
1057 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1058 if (sl->packet_seq_num_len)
1059 skip_bits_long(&gb, sl->packet_seq_num_len);
1060 if (sl->degr_prior_len)
1062 skip_bits(&gb, sl->degr_prior_len);
1064 skip_bits_long(&gb, sl->ocr_len);
1065 if (au_start_flag) {
1066 if (sl->use_rand_acc_pt)
1068 if (sl->au_seq_num_len > 0)
1069 skip_bits_long(&gb, sl->au_seq_num_len);
1070 if (sl->use_timestamps) {
1071 dts_flag = get_bits1(&gb);
1072 cts_flag = get_bits1(&gb);
1075 if (sl->inst_bitrate_len)
1076 inst_bitrate_flag = get_bits1(&gb);
1078 dts = get_ts64(&gb, sl->timestamp_len);
1080 cts = get_ts64(&gb, sl->timestamp_len);
1082 skip_bits_long(&gb, sl->au_len);
1083 if (inst_bitrate_flag)
1084 skip_bits_long(&gb, sl->inst_bitrate_len);
1087 if (dts != AV_NOPTS_VALUE)
1089 if (cts != AV_NOPTS_VALUE)
1092 if (sl->timestamp_len && sl->timestamp_res)
1093 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1095 return (get_bits_count(&gb) + 7) >> 3;
1098 static AVBufferRef *buffer_pool_get(MpegTSContext *ts, int size)
1100 int index = av_log2(size + AV_INPUT_BUFFER_PADDING_SIZE);
1101 if (!ts->pools[index]) {
1102 int pool_size = FFMIN(MAX_PES_PAYLOAD + AV_INPUT_BUFFER_PADDING_SIZE, 2 << index);
1103 ts->pools[index] = av_buffer_pool_init(pool_size, NULL);
1104 if (!ts->pools[index])
1107 return av_buffer_pool_get(ts->pools[index]);
1110 /* return non zero if a packet could be constructed */
1111 static int mpegts_push_data(MpegTSFilter *filter,
1112 const uint8_t *buf, int buf_size, int is_start,
1115 PESContext *pes = filter->u.pes_filter.opaque;
1116 MpegTSContext *ts = pes->ts;
1124 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1125 ret = new_pes_packet(pes, ts->pkt);
1130 reset_pes_packet_state(pes);
1132 pes->state = MPEGTS_HEADER;
1133 pes->ts_packet_pos = pos;
1136 while (buf_size > 0) {
1137 switch (pes->state) {
1139 len = PES_START_SIZE - pes->data_index;
1142 memcpy(pes->header + pes->data_index, p, len);
1143 pes->data_index += len;
1146 if (pes->data_index == PES_START_SIZE) {
1147 /* we got all the PES or section header. We can now
1149 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1150 pes->header[2] == 0x01) {
1151 /* it must be an MPEG-2 PES stream */
1152 code = pes->header[3] | 0x100;
1153 av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1155 pes->stream_id = pes->header[3];
1157 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1159 pes->sub_st->discard == AVDISCARD_ALL)) ||
1160 code == 0x1be) /* padding_stream */
1163 /* stream not present in PMT */
1165 if (ts->skip_changes)
1167 if (ts->merge_pmt_versions)
1168 goto skip; /* wait for PMT to merge new stream */
1170 pes->st = avformat_new_stream(ts->stream, NULL);
1172 return AVERROR(ENOMEM);
1173 pes->st->id = pes->pid;
1174 mpegts_set_stream_info(pes->st, pes, 0, 0);
1177 pes->total_size = AV_RB16(pes->header + 4);
1178 /* NOTE: a zero total size means the PES size is
1180 if (!pes->total_size)
1181 pes->total_size = MAX_PES_PAYLOAD;
1183 /* allocate pes buffer */
1184 pes->buffer = buffer_pool_get(ts, pes->total_size);
1186 return AVERROR(ENOMEM);
1188 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1189 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1190 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1191 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1192 pes->state = MPEGTS_PESHEADER;
1193 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->internal->request_probe) {
1194 av_log(pes->stream, AV_LOG_TRACE,
1195 "pid=%x stream_type=%x probing\n",
1198 pes->st->internal->request_probe = 1;
1201 pes->pes_header_size = 6;
1202 pes->state = MPEGTS_PAYLOAD;
1203 pes->data_index = 0;
1206 /* otherwise, it should be a table */
1209 pes->state = MPEGTS_SKIP;
1214 /**********************************************/
1215 /* PES packing parsing */
1216 case MPEGTS_PESHEADER:
1217 len = PES_HEADER_SIZE - pes->data_index;
1219 return AVERROR_INVALIDDATA;
1222 memcpy(pes->header + pes->data_index, p, len);
1223 pes->data_index += len;
1226 if (pes->data_index == PES_HEADER_SIZE) {
1227 pes->pes_header_size = pes->header[8] + 9;
1228 pes->state = MPEGTS_PESHEADER_FILL;
1231 case MPEGTS_PESHEADER_FILL:
1232 len = pes->pes_header_size - pes->data_index;
1234 return AVERROR_INVALIDDATA;
1237 memcpy(pes->header + pes->data_index, p, len);
1238 pes->data_index += len;
1241 if (pes->data_index == pes->pes_header_size) {
1243 unsigned int flags, pes_ext, skip;
1245 flags = pes->header[7];
1246 r = pes->header + 9;
1247 pes->pts = AV_NOPTS_VALUE;
1248 pes->dts = AV_NOPTS_VALUE;
1249 if ((flags & 0xc0) == 0x80) {
1250 pes->dts = pes->pts = ff_parse_pes_pts(r);
1252 } else if ((flags & 0xc0) == 0xc0) {
1253 pes->pts = ff_parse_pes_pts(r);
1255 pes->dts = ff_parse_pes_pts(r);
1258 pes->extended_stream_id = -1;
1259 if (flags & 0x01) { /* PES extension */
1261 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1262 skip = (pes_ext >> 4) & 0xb;
1265 if ((pes_ext & 0x41) == 0x01 &&
1266 (r + 2) <= (pes->header + pes->pes_header_size)) {
1267 /* PES extension 2 */
1268 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1269 pes->extended_stream_id = r[1];
1273 /* we got the full header. We parse it and get the payload */
1274 pes->state = MPEGTS_PAYLOAD;
1275 pes->data_index = 0;
1276 if (pes->stream_type == 0x12 && buf_size > 0) {
1277 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1279 pes->pes_header_size += sl_header_bytes;
1280 p += sl_header_bytes;
1281 buf_size -= sl_header_bytes;
1283 if (pes->stream_type == 0x15 && buf_size >= 5) {
1284 /* skip metadata access unit header */
1285 pes->pes_header_size += 5;
1289 if ( pes->ts->fix_teletext_pts
1290 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1291 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1293 AVProgram *p = NULL;
1295 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1296 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1297 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1299 AVStream *st = NULL;
1300 if (f->type == MPEGTS_PES) {
1301 PESContext *pcrpes = f->u.pes_filter.opaque;
1304 } else if (f->type == MPEGTS_PCR) {
1306 for (i = 0; i < p->nb_stream_indexes; i++) {
1307 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1308 if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1312 if (f->last_pcr != -1 && !f->discard) {
1313 // teletext packets do not always have correct timestamps,
1314 // the standard says they should be handled after 40.6 ms at most,
1315 // and the pcr error to this packet should be no more than 100 ms.
1316 // TODO: we should interpolate the PCR, not just use the last one
1317 int64_t pcr = f->last_pcr / 300;
1320 pes->st->internal->pts_wrap_reference = st->internal->pts_wrap_reference;
1321 pes->st->internal->pts_wrap_behavior = st->internal->pts_wrap_behavior;
1323 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1324 pes->pts = pes->dts = pcr;
1325 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1326 pes->dts > pcr + 3654 + 9000) {
1327 pes->pts = pes->dts = pcr + 3654 + 9000;
1328 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1329 pes->dts > pcr + 10*90000) { //10sec
1330 pes->pts = pes->dts = pcr + 3654 + 9000;
1338 if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1340 av_log(pes->stream, AV_LOG_VERBOSE,
1341 "Forcing DTS/PTS to be unset for a "
1342 "non-trustworthy PES packet for PID %d as "
1343 "PCR hasn't been received yet.\n",
1345 pes->dts = pes->pts = AV_NOPTS_VALUE;
1350 case MPEGTS_PAYLOAD:
1352 if (pes->data_index > 0 &&
1353 pes->data_index + buf_size > pes->total_size) {
1354 ret = new_pes_packet(pes, ts->pkt);
1357 pes->total_size = MAX_PES_PAYLOAD;
1358 pes->buffer = buffer_pool_get(ts, pes->total_size);
1360 return AVERROR(ENOMEM);
1362 } else if (pes->data_index == 0 &&
1363 buf_size > pes->total_size) {
1364 // pes packet size is < ts size packet and pes data is padded with 0xff
1365 // not sure if this is legal in ts but see issue #2392
1366 buf_size = pes->total_size;
1368 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1369 pes->data_index += buf_size;
1370 /* emit complete packets with known packet size
1371 * decreases demuxer delay for infrequent packets like subtitles from
1372 * a couple of seconds to milliseconds for properly muxed files.
1373 * total_size is the number of bytes following pes_packet_length
1374 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1375 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1376 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1378 ret = new_pes_packet(pes, ts->pkt);
1394 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1399 /* if no pid found, then add a pid context */
1400 pes = av_mallocz(sizeof(PESContext));
1404 pes->stream = ts->stream;
1406 pes->pcr_pid = pcr_pid;
1407 pes->state = MPEGTS_SKIP;
1408 pes->pts = AV_NOPTS_VALUE;
1409 pes->dts = AV_NOPTS_VALUE;
1410 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1419 typedef struct MP4DescrParseContext {
1423 Mp4Descr *active_descr;
1425 int max_descr_count;
1427 int predefined_SLConfigDescriptor_seen;
1428 } MP4DescrParseContext;
1430 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1431 const uint8_t *buf, unsigned size,
1432 Mp4Descr *descr, int max_descr_count)
1435 if (size > (1 << 30))
1436 return AVERROR_INVALIDDATA;
1438 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1439 NULL, NULL, NULL, NULL)) < 0)
1446 d->active_descr = NULL;
1447 d->max_descr_count = max_descr_count;
1452 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1454 int64_t new_off = avio_tell(pb);
1455 (*len) -= new_off - *off;
1459 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1462 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1465 int ret = parse_mp4_descr(d, off, len, 0);
1468 update_offsets(&d->pb, &off, &len);
1473 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1475 avio_rb16(&d->pb); // ID
1481 update_offsets(&d->pb, &off, &len);
1482 return parse_mp4_descr_arr(d, off, len);
1485 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1490 id_flags = avio_rb16(&d->pb);
1491 if (!(id_flags & 0x0020)) { // URL_Flag
1492 update_offsets(&d->pb, &off, &len);
1493 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1499 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1504 if (d->descr_count >= d->max_descr_count)
1505 return AVERROR_INVALIDDATA;
1506 ff_mp4_parse_es_descr(&d->pb, &es_id);
1507 d->active_descr = d->descr + (d->descr_count++);
1509 d->active_descr->es_id = es_id;
1510 update_offsets(&d->pb, &off, &len);
1511 if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1513 update_offsets(&d->pb, &off, &len);
1515 ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1516 d->active_descr = NULL;
1520 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1523 Mp4Descr *descr = d->active_descr;
1525 return AVERROR_INVALIDDATA;
1526 d->active_descr->dec_config_descr = av_malloc(len);
1527 if (!descr->dec_config_descr)
1528 return AVERROR(ENOMEM);
1529 descr->dec_config_descr_len = len;
1530 avio_read(&d->pb, descr->dec_config_descr, len);
1534 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1536 Mp4Descr *descr = d->active_descr;
1539 return AVERROR_INVALIDDATA;
1541 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1542 descr->sl.dst = avio_r8(&d->pb); \
1543 if (descr->sl.dst > maxv) { \
1544 descr->sl.dst = maxv; \
1545 return AVERROR_INVALIDDATA; \
1549 predefined = avio_r8(&d->pb);
1552 int flags = avio_r8(&d->pb);
1553 descr->sl.use_au_start = !!(flags & 0x80);
1554 descr->sl.use_au_end = !!(flags & 0x40);
1555 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1556 descr->sl.use_padding = !!(flags & 0x08);
1557 descr->sl.use_timestamps = !!(flags & 0x04);
1558 descr->sl.use_idle = !!(flags & 0x02);
1559 descr->sl.timestamp_res = avio_rb32(&d->pb);
1561 R8_CHECK_CLIP_MAX(timestamp_len, 63);
1562 R8_CHECK_CLIP_MAX(ocr_len, 63);
1563 R8_CHECK_CLIP_MAX(au_len, 31);
1564 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1565 lengths = avio_rb16(&d->pb);
1566 descr->sl.degr_prior_len = lengths >> 12;
1567 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1568 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1569 } else if (!d->predefined_SLConfigDescriptor_seen){
1570 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1571 d->predefined_SLConfigDescriptor_seen = 1;
1576 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1580 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1583 update_offsets(&d->pb, &off, &len);
1584 if (len < 0 || len1 > len || len1 <= 0) {
1585 av_log(d->s, AV_LOG_ERROR,
1586 "Tag %x length violation new length %d bytes remaining %d\n",
1588 return AVERROR_INVALIDDATA;
1591 if (d->level++ >= MAX_LEVEL) {
1592 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1593 ret = AVERROR_INVALIDDATA;
1597 if (target_tag && tag != target_tag) {
1598 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1600 ret = AVERROR_INVALIDDATA;
1606 ret = parse_MP4IODescrTag(d, off, len1);
1609 ret = parse_MP4ODescrTag(d, off, len1);
1612 ret = parse_MP4ESDescrTag(d, off, len1);
1614 case MP4DecConfigDescrTag:
1615 ret = parse_MP4DecConfigDescrTag(d, off, len1);
1618 ret = parse_MP4SLDescrTag(d, off, len1);
1625 avio_seek(&d->pb, off + len1, SEEK_SET);
1629 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1630 Mp4Descr *descr, int *descr_count, int max_descr_count)
1632 MP4DescrParseContext d;
1635 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1639 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1641 *descr_count = d.descr_count;
1645 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1646 Mp4Descr *descr, int *descr_count, int max_descr_count)
1648 MP4DescrParseContext d;
1651 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1655 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1657 *descr_count = d.descr_count;
1661 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1664 MpegTSContext *ts = filter->u.section_filter.opaque;
1665 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1667 const uint8_t *p, *p_end;
1669 int mp4_descr_count = 0;
1670 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1672 AVFormatContext *s = ts->stream;
1674 p_end = section + section_len - 4;
1676 if (parse_section_header(&h, &p, p_end) < 0)
1678 if (h.tid != M4OD_TID)
1680 if (skip_identical(&h, tssf))
1683 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1684 MAX_MP4_DESCR_COUNT);
1686 for (pid = 0; pid < NB_PID_MAX; pid++) {
1689 for (i = 0; i < mp4_descr_count; i++) {
1692 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1694 if (ts->pids[pid]->type != MPEGTS_PES) {
1695 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1698 pes = ts->pids[pid]->u.pes_filter.opaque;
1703 pes->sl = mp4_descr[i].sl;
1705 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1706 mp4_descr[i].dec_config_descr_len, 0,
1707 NULL, NULL, NULL, NULL);
1708 ff_mp4_read_dec_config_descr(s, st, &pb);
1709 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1710 st->codecpar->extradata_size > 0)
1711 st->need_parsing = 0;
1712 if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1713 st->codecpar->extradata_size > 0)
1714 st->need_parsing = 0;
1716 st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1717 st->internal->need_context_update = 1;
1720 for (i = 0; i < mp4_descr_count; i++)
1721 av_free(mp4_descr[i].dec_config_descr);
1724 static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1727 AVProgram *prg = NULL;
1728 MpegTSContext *ts = filter->u.section_filter.opaque;
1730 int idx = ff_find_stream_index(ts->stream, filter->pid);
1735 * In case we receive an SCTE-35 packet before mpegts context is fully
1741 new_data_packet(section, section_len, ts->pkt);
1742 ts->pkt->stream_index = idx;
1743 prg = av_find_program_from_stream(ts->stream, NULL, idx);
1744 if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1745 MpegTSFilter *f = ts->pids[prg->pcr_pid];
1746 if (f && f->last_pcr != -1)
1747 ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1753 static const uint8_t opus_coupled_stream_cnt[9] = {
1754 1, 0, 1, 1, 2, 2, 2, 3, 3
1757 static const uint8_t opus_stream_cnt[9] = {
1758 1, 1, 1, 2, 2, 3, 4, 4, 5,
1761 static const uint8_t opus_channel_map[8][8] = {
1769 { 0,6,1,2,3,4,5,7 },
1772 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1773 const uint8_t **pp, const uint8_t *desc_list_end,
1774 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1777 const uint8_t *desc_end;
1778 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1782 desc_tag = get8(pp, desc_list_end);
1784 return AVERROR_INVALIDDATA;
1785 desc_len = get8(pp, desc_list_end);
1787 return AVERROR_INVALIDDATA;
1788 desc_end = *pp + desc_len;
1789 if (desc_end > desc_list_end)
1790 return AVERROR_INVALIDDATA;
1792 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1794 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->internal->request_probe > 0) &&
1795 stream_type == STREAM_TYPE_PRIVATE_DATA)
1796 mpegts_find_stream_type(st, desc_tag, DESC_types);
1799 case VIDEO_STREAM_DESCRIPTOR:
1800 if (get8(pp, desc_end) & 0x1) {
1801 st->disposition |= AV_DISPOSITION_STILL_IMAGE;
1805 desc_es_id = get16(pp, desc_end);
1808 if (ts && ts->pids[pid])
1809 ts->pids[pid]->es_id = desc_es_id;
1810 for (i = 0; i < mp4_descr_count; i++)
1811 if (mp4_descr[i].dec_config_descr_len &&
1812 mp4_descr[i].es_id == desc_es_id) {
1814 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1815 mp4_descr[i].dec_config_descr_len, 0,
1816 NULL, NULL, NULL, NULL);
1817 ff_mp4_read_dec_config_descr(fc, st, &pb);
1818 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1819 st->codecpar->extradata_size > 0) {
1820 st->need_parsing = 0;
1821 st->internal->need_context_update = 1;
1823 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1824 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1827 case FMC_DESCRIPTOR:
1828 if (get16(pp, desc_end) < 0)
1830 if (mp4_descr_count > 0 &&
1831 (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1832 (st->internal->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1833 st->internal->request_probe > 0) &&
1834 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1836 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1837 mp4_descr->dec_config_descr_len, 0,
1838 NULL, NULL, NULL, NULL);
1839 ff_mp4_read_dec_config_descr(fc, st, &pb);
1840 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1841 st->codecpar->extradata_size > 0) {
1842 st->internal->request_probe = st->need_parsing = 0;
1843 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1844 st->internal->need_context_update = 1;
1848 case 0x56: /* DVB teletext descriptor */
1850 uint8_t *extradata = NULL;
1851 int language_count = desc_len / 5, ret;
1853 if (desc_len > 0 && desc_len % 5 != 0)
1854 return AVERROR_INVALIDDATA;
1856 if (language_count > 0) {
1857 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1858 av_assert0(language_count <= sizeof(language) / 4);
1860 if (st->codecpar->extradata == NULL) {
1861 ret = ff_alloc_extradata(st->codecpar, language_count * 2);
1866 if (st->codecpar->extradata_size < language_count * 2)
1867 return AVERROR_INVALIDDATA;
1869 extradata = st->codecpar->extradata;
1871 for (i = 0; i < language_count; i++) {
1872 language[i * 4 + 0] = get8(pp, desc_end);
1873 language[i * 4 + 1] = get8(pp, desc_end);
1874 language[i * 4 + 2] = get8(pp, desc_end);
1875 language[i * 4 + 3] = ',';
1877 memcpy(extradata, *pp, 2);
1883 language[i * 4 - 1] = 0;
1884 av_dict_set(&st->metadata, "language", language, 0);
1885 st->internal->need_context_update = 1;
1889 case 0x59: /* subtitling descriptor */
1891 /* 8 bytes per DVB subtitle substream data:
1892 * ISO_639_language_code (3 bytes),
1893 * subtitling_type (1 byte),
1894 * composition_page_id (2 bytes),
1895 * ancillary_page_id (2 bytes) */
1896 int language_count = desc_len / 8, ret;
1898 if (desc_len > 0 && desc_len % 8 != 0)
1899 return AVERROR_INVALIDDATA;
1901 if (language_count > 1) {
1902 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1905 if (language_count > 0) {
1908 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1909 av_assert0(language_count <= sizeof(language) / 4);
1911 if (st->codecpar->extradata == NULL) {
1912 ret = ff_alloc_extradata(st->codecpar, language_count * 5);
1917 if (st->codecpar->extradata_size < language_count * 5)
1918 return AVERROR_INVALIDDATA;
1920 extradata = st->codecpar->extradata;
1922 for (i = 0; i < language_count; i++) {
1923 language[i * 4 + 0] = get8(pp, desc_end);
1924 language[i * 4 + 1] = get8(pp, desc_end);
1925 language[i * 4 + 2] = get8(pp, desc_end);
1926 language[i * 4 + 3] = ',';
1928 /* hearing impaired subtitles detection using subtitling_type */
1930 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1931 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1932 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1933 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1934 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1935 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1936 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1940 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1941 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1947 language[i * 4 - 1] = 0;
1948 av_dict_set(&st->metadata, "language", language, 0);
1949 st->internal->need_context_update = 1;
1953 case ISO_639_LANGUAGE_DESCRIPTOR:
1954 for (i = 0; i + 4 <= desc_len; i += 4) {
1955 language[i + 0] = get8(pp, desc_end);
1956 language[i + 1] = get8(pp, desc_end);
1957 language[i + 2] = get8(pp, desc_end);
1958 language[i + 3] = ',';
1959 switch (get8(pp, desc_end)) {
1961 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1964 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1967 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1968 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
1972 if (i && language[0]) {
1973 language[i - 1] = 0;
1974 /* don't overwrite language, as it may already have been set by
1975 * another, more specific descriptor (e.g. supplementary audio) */
1976 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
1979 case REGISTRATION_DESCRIPTOR:
1980 st->codecpar->codec_tag = bytestream_get_le32(pp);
1981 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1982 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->internal->request_probe > 0) {
1983 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1984 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1985 st->internal->request_probe = 50;
1988 case 0x52: /* stream identifier descriptor */
1989 st->stream_identifier = 1 + get8(pp, desc_end);
1991 case METADATA_DESCRIPTOR:
1992 if (get16(pp, desc_end) == 0xFFFF)
1994 if (get8(pp, desc_end) == 0xFF) {
1995 st->codecpar->codec_tag = bytestream_get_le32(pp);
1996 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
1997 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
2000 case 0x7f: /* DVB extension descriptor */
2001 ext_desc_tag = get8(pp, desc_end);
2002 if (ext_desc_tag < 0)
2003 return AVERROR_INVALIDDATA;
2004 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
2005 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2006 if (!st->codecpar->extradata) {
2007 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
2008 AV_INPUT_BUFFER_PADDING_SIZE);
2009 if (!st->codecpar->extradata)
2010 return AVERROR(ENOMEM);
2012 st->codecpar->extradata_size = sizeof(opus_default_extradata);
2013 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
2015 channel_config_code = get8(pp, desc_end);
2016 if (channel_config_code < 0)
2017 return AVERROR_INVALIDDATA;
2018 if (channel_config_code <= 0x8) {
2019 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2020 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2021 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2022 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2023 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2025 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2027 st->need_parsing = AVSTREAM_PARSE_FULL;
2028 st->internal->need_context_update = 1;
2031 if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
2035 return AVERROR_INVALIDDATA;
2036 flags = get8(pp, desc_end);
2038 if ((flags & 0x80) == 0) /* mix_type */
2039 st->disposition |= AV_DISPOSITION_DEPENDENT;
2041 switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2043 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2044 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2047 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2050 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2054 if (flags & 0x01) { /* language_code_present */
2056 return AVERROR_INVALIDDATA;
2057 language[0] = get8(pp, desc_end);
2058 language[1] = get8(pp, desc_end);
2059 language[2] = get8(pp, desc_end);
2062 /* This language always has to override a possible
2063 * ISO 639 language descriptor language */
2065 av_dict_set(&st->metadata, "language", language, 0);
2069 case 0x6a: /* ac-3_descriptor */
2071 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2072 if (component_type_flag) {
2073 int component_type = get8(pp, desc_end);
2074 int service_type_mask = 0x38; // 0b00111000
2075 int service_type = ((component_type & service_type_mask) >> 3);
2076 if (service_type == 0x02 /* 0b010 */) {
2077 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2078 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2083 case 0x7a: /* enhanced_ac-3_descriptor */
2085 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2086 if (component_type_flag) {
2087 int component_type = get8(pp, desc_end);
2088 int service_type_mask = 0x38; // 0b00111000
2089 int service_type = ((component_type & service_type_mask) >> 3);
2090 if (service_type == 0x02 /* 0b010 */) {
2091 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2092 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2097 case 0xfd: /* ARIB data coding type descriptor */
2098 // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2100 if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2101 // This structure is defined in STD-B10, part 1, listing 5.4 and
2103 // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2104 // Component tag limits are documented in TR-B14, fascicle 2,
2105 // Vol. 3, Section 2, 4.2.8.1
2106 int actual_component_tag = st->stream_identifier - 1;
2107 int picked_profile = FF_PROFILE_UNKNOWN;
2108 int data_component_id = get16(pp, desc_end);
2109 if (data_component_id < 0)
2110 return AVERROR_INVALIDDATA;
2112 switch (data_component_id) {
2114 // [0x30..0x37] are component tags utilized for
2115 // non-mobile captioning service ("profile A").
2116 if (actual_component_tag >= 0x30 &&
2117 actual_component_tag <= 0x37) {
2118 picked_profile = FF_PROFILE_ARIB_PROFILE_A;
2122 // component tag 0x87 signifies a mobile/partial reception
2123 // (1seg) captioning service ("profile C").
2124 if (actual_component_tag == 0x87) {
2125 picked_profile = FF_PROFILE_ARIB_PROFILE_C;
2132 if (picked_profile == FF_PROFILE_UNKNOWN)
2135 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2136 st->codecpar->codec_id = AV_CODEC_ID_ARIB_CAPTION;
2137 st->codecpar->profile = picked_profile;
2138 st->internal->request_probe = 0;
2141 case 0xb0: /* DOVI video stream descriptor */
2144 AVDOVIDecoderConfigurationRecord *dovi;
2147 if (desc_end - *pp < 4) // (8 + 8 + 7 + 6 + 1 + 1 + 1) / 8
2148 return AVERROR_INVALIDDATA;
2150 dovi = av_dovi_alloc(&dovi_size);
2152 return AVERROR(ENOMEM);
2154 dovi->dv_version_major = get8(pp, desc_end);
2155 dovi->dv_version_minor = get8(pp, desc_end);
2156 buf = get16(pp, desc_end);
2157 dovi->dv_profile = (buf >> 9) & 0x7f; // 7 bits
2158 dovi->dv_level = (buf >> 3) & 0x3f; // 6 bits
2159 dovi->rpu_present_flag = (buf >> 2) & 0x01; // 1 bit
2160 dovi->el_present_flag = (buf >> 1) & 0x01; // 1 bit
2161 dovi->bl_present_flag = buf & 0x01; // 1 bit
2162 if (desc_end - *pp >= 20) { // 4 + 4 * 4
2163 buf = get8(pp, desc_end);
2164 dovi->dv_bl_signal_compatibility_id = (buf >> 4) & 0x0f; // 4 bits
2166 // 0 stands for None
2167 // Dolby Vision V1.2.93 profiles and levels
2168 dovi->dv_bl_signal_compatibility_id = 0;
2171 ret = av_stream_add_side_data(st, AV_PKT_DATA_DOVI_CONF,
2172 (uint8_t *)dovi, dovi_size);
2178 av_log(fc, AV_LOG_TRACE, "DOVI, version: %d.%d, profile: %d, level: %d, "
2179 "rpu flag: %d, el flag: %d, bl flag: %d, compatibility id: %d\n",
2180 dovi->dv_version_major, dovi->dv_version_minor,
2181 dovi->dv_profile, dovi->dv_level,
2182 dovi->rpu_present_flag,
2183 dovi->el_present_flag,
2184 dovi->bl_present_flag,
2185 dovi->dv_bl_signal_compatibility_id);
2195 static AVStream *find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid,
2196 int stream_identifier, int pmt_stream_idx)
2198 AVFormatContext *s = ts->stream;
2200 AVStream *found = NULL;
2202 for (i = 0; i < s->nb_streams; i++) {
2203 AVStream *st = s->streams[i];
2204 if (st->program_num != programid)
2206 if (stream_identifier != -1) { /* match based on "stream identifier descriptor" if present */
2207 if (st->stream_identifier == stream_identifier+1) {
2211 } else if (st->pmt_stream_idx == pmt_stream_idx) { /* match based on position within the PMT */
2218 av_log(ts->stream, AV_LOG_VERBOSE,
2219 "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2220 av_get_media_type_string(found->codecpar->codec_type),
2227 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2229 const uint8_t **pp = &p;
2230 const uint8_t *desc_list_end;
2231 const uint8_t *desc_end;
2233 int desc_len, desc_tag;
2235 desc_list_len = get16(pp, p_end);
2236 if (desc_list_len < 0)
2238 desc_list_len &= 0xfff;
2239 desc_list_end = p + desc_list_len;
2240 if (desc_list_end > p_end)
2244 desc_tag = get8(pp, desc_list_end);
2247 desc_len = get8(pp, desc_list_end);
2250 desc_end = *pp + desc_len;
2251 if (desc_end > desc_list_end)
2254 if (desc_tag == 0x52) {
2255 return get8(pp, desc_end);
2263 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2265 return !(stream_type == 0x13 ||
2266 (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
2269 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2271 MpegTSContext *ts = filter->u.section_filter.opaque;
2272 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2273 SectionHeader h1, *h = &h1;
2276 const uint8_t *p, *p_end, *desc_list_end;
2277 int program_info_length, pcr_pid, pid, stream_type;
2279 uint32_t prog_reg_desc = 0; /* registration descriptor */
2280 int stream_identifier = -1;
2281 struct Program *prg;
2283 int mp4_descr_count = 0;
2284 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2287 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2288 hex_dump_debug(ts->stream, section, section_len);
2290 p_end = section + section_len - 4;
2292 if (parse_section_header(h, &p, p_end) < 0)
2294 if (h->tid != PMT_TID)
2296 if (skip_identical(h, tssf))
2299 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2300 h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2302 if (!ts->scan_all_pmts && ts->skip_changes)
2305 prg = get_program(ts, h->id);
2307 if (ts->skip_unknown_pmt && !prg)
2309 if (prg && prg->nb_pids && prg->pids[0] != ts->current_pid)
2311 if (!ts->skip_clear)
2312 clear_avprogram(ts, h->id);
2314 add_pid_to_program(prg, ts->current_pid);
2316 pcr_pid = get16(&p, p_end);
2320 add_pid_to_program(prg, pcr_pid);
2321 update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2323 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2325 program_info_length = get16(&p, p_end);
2326 if (program_info_length < 0)
2328 program_info_length &= 0xfff;
2329 while (program_info_length >= 2) {
2331 tag = get8(&p, p_end);
2332 len = get8(&p, p_end);
2334 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2336 if (len > program_info_length - 2)
2337 // something else is broken, exit the program_descriptors_loop
2339 program_info_length -= len + 2;
2340 if (tag == IOD_DESCRIPTOR) {
2341 get8(&p, p_end); // scope
2342 get8(&p, p_end); // label
2344 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2345 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2346 } else if (tag == REGISTRATION_DESCRIPTOR && len >= 4) {
2347 prog_reg_desc = bytestream_get_le32(&p);
2352 p += program_info_length;
2356 // stop parsing after pmt, we found header
2363 for (i = 0; ; i++) {
2366 stream_type = get8(&p, p_end);
2367 if (stream_type < 0)
2369 pid = get16(&p, p_end);
2373 if (pid == ts->current_pid)
2376 if (ts->merge_pmt_versions)
2377 stream_identifier = parse_stream_identifier_desc(p, p_end);
2379 /* now create stream */
2380 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2381 pes = ts->pids[pid]->u.pes_filter.opaque;
2382 if (ts->merge_pmt_versions && !pes->st) {
2383 st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2386 pes->stream_type = stream_type;
2391 pes->st = avformat_new_stream(pes->stream, NULL);
2394 pes->st->id = pes->pid;
2395 pes->st->program_num = h->id;
2396 pes->st->pmt_version = h->version;
2397 pes->st->pmt_stream_idx = i;
2400 } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2402 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2403 pes = add_pes_stream(ts, pid, pcr_pid);
2404 if (ts->merge_pmt_versions && pes && !pes->st) {
2405 st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2408 pes->stream_type = stream_type;
2412 if (pes && !pes->st) {
2413 st = avformat_new_stream(pes->stream, NULL);
2417 st->program_num = h->id;
2418 st->pmt_version = h->version;
2419 st->pmt_stream_idx = i;
2422 int idx = ff_find_stream_index(ts->stream, pid);
2424 st = ts->stream->streams[idx];
2426 if (ts->merge_pmt_versions && !st) {
2427 st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2430 st = avformat_new_stream(ts->stream, NULL);
2434 st->program_num = h->id;
2435 st->pmt_version = h->version;
2436 st->pmt_stream_idx = i;
2437 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2438 if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2439 mpegts_find_stream_type(st, stream_type, SCTE_types);
2440 mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2448 if (pes && !pes->stream_type)
2449 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2451 add_pid_to_program(prg, pid);
2453 av_program_add_stream_index(ts->stream, h->id, st->index);
2455 desc_list_len = get16(&p, p_end);
2456 if (desc_list_len < 0)
2458 desc_list_len &= 0xfff;
2459 desc_list_end = p + desc_list_len;
2460 if (desc_list_end > p_end)
2463 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2464 desc_list_end, mp4_descr,
2465 mp4_descr_count, pid, ts) < 0)
2468 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2469 stream_type == 0x83 && pes->sub_st) {
2470 av_program_add_stream_index(ts->stream, h->id,
2471 pes->sub_st->index);
2472 pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2478 if (!ts->pids[pcr_pid])
2479 mpegts_open_pcr_filter(ts, pcr_pid);
2482 for (i = 0; i < mp4_descr_count; i++)
2483 av_free(mp4_descr[i].dec_config_descr);
2486 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2488 MpegTSContext *ts = filter->u.section_filter.opaque;
2489 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2490 SectionHeader h1, *h = &h1;
2491 const uint8_t *p, *p_end;
2496 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2497 hex_dump_debug(ts->stream, section, section_len);
2499 p_end = section + section_len - 4;
2501 if (parse_section_header(h, &p, p_end) < 0)
2503 if (h->tid != PAT_TID)
2505 if (ts->skip_changes)
2508 if (skip_identical(h, tssf))
2510 ts->stream->ts_id = h->id;
2513 sid = get16(&p, p_end);
2516 pmt_pid = get16(&p, p_end);
2521 if (pmt_pid == ts->current_pid)
2524 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2526 if (sid == 0x0000) {
2529 MpegTSFilter *fil = ts->pids[pmt_pid];
2530 struct Program *prg;
2531 program = av_new_program(ts->stream, sid);
2533 program->program_num = sid;
2534 program->pmt_pid = pmt_pid;
2537 if ( fil->type != MPEGTS_SECTION
2538 || fil->pid != pmt_pid
2539 || fil->u.section_filter.section_cb != pmt_cb)
2540 mpegts_close_filter(ts, ts->pids[pmt_pid]);
2542 if (!ts->pids[pmt_pid])
2543 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2544 prg = add_program(ts, sid);
2546 unsigned prg_idx = prg - ts->prg;
2547 if (prg->nb_pids && prg->pids[0] != pmt_pid)
2549 add_pid_to_program(prg, pmt_pid);
2550 if (prg_idx > nb_prg)
2551 FFSWAP(struct Program, ts->prg[nb_prg], ts->prg[prg_idx]);
2552 if (prg_idx >= nb_prg)
2557 ts->nb_prg = nb_prg;
2561 for (j=0; j<ts->stream->nb_programs; j++) {
2562 for (i = 0; i < ts->nb_prg; i++)
2563 if (ts->prg[i].id == ts->stream->programs[j]->id)
2565 if (i==ts->nb_prg && !ts->skip_clear)
2566 clear_avprogram(ts, ts->stream->programs[j]->id);
2571 static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2573 MpegTSContext *ts = filter->u.section_filter.opaque;
2574 const uint8_t *p, *p_end;
2575 SectionHeader h1, *h = &h1;
2578 * Sometimes we receive EPG packets but SDT table do not have
2579 * eit_pres_following or eit_sched turned on, so we open EPG
2580 * stream directly here.
2582 if (!ts->epg_stream) {
2583 ts->epg_stream = avformat_new_stream(ts->stream, NULL);
2584 if (!ts->epg_stream)
2586 ts->epg_stream->id = EIT_PID;
2587 ts->epg_stream->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2588 ts->epg_stream->codecpar->codec_id = AV_CODEC_ID_EPG;
2591 if (ts->epg_stream->discard == AVDISCARD_ALL)
2594 p_end = section + section_len - 4;
2597 if (parse_section_header(h, &p, p_end) < 0)
2599 if (h->tid < EIT_TID || h->tid > OEITS_END_TID)
2602 av_log(ts->stream, AV_LOG_TRACE, "EIT: tid received = %.02x\n", h->tid);
2605 * Service_id 0xFFFF is reserved, it indicates that the current EIT table
2608 if (h->id == 0xFFFF) {
2609 av_log(ts->stream, AV_LOG_TRACE, "Scrambled EIT table received.\n");
2614 * In case we receive an EPG packet before mpegts context is fully
2620 new_data_packet(section, section_len, ts->pkt);
2621 ts->pkt->stream_index = ts->epg_stream->index;
2625 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2627 MpegTSContext *ts = filter->u.section_filter.opaque;
2628 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2629 SectionHeader h1, *h = &h1;
2630 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2631 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2632 char *name, *provider_name;
2634 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2635 hex_dump_debug(ts->stream, section, section_len);
2637 p_end = section + section_len - 4;
2639 if (parse_section_header(h, &p, p_end) < 0)
2641 if (h->tid != SDT_TID)
2643 if (ts->skip_changes)
2645 if (skip_identical(h, tssf))
2648 onid = get16(&p, p_end);
2651 val = get8(&p, p_end);
2655 sid = get16(&p, p_end);
2658 val = get8(&p, p_end);
2661 desc_list_len = get16(&p, p_end);
2662 if (desc_list_len < 0)
2664 desc_list_len &= 0xfff;
2665 desc_list_end = p + desc_list_len;
2666 if (desc_list_end > p_end)
2669 desc_tag = get8(&p, desc_list_end);
2672 desc_len = get8(&p, desc_list_end);
2673 desc_end = p + desc_len;
2674 if (desc_len < 0 || desc_end > desc_list_end)
2677 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2678 desc_tag, desc_len);
2682 service_type = get8(&p, p_end);
2683 if (service_type < 0)
2685 provider_name = getstr8(&p, p_end);
2688 name = getstr8(&p, p_end);
2690 AVProgram *program = av_new_program(ts->stream, sid);
2692 av_dict_set(&program->metadata, "service_name", name, 0);
2693 av_dict_set(&program->metadata, "service_provider",
2698 av_free(provider_name);
2709 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2710 const uint8_t *packet);
2712 /* handle one TS packet */
2713 static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
2716 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2717 has_adaptation, has_payload;
2718 const uint8_t *p, *p_end;
2720 pid = AV_RB16(packet + 1) & 0x1fff;
2721 is_start = packet[1] & 0x40;
2722 tss = ts->pids[pid];
2723 if (ts->auto_guess && !tss && is_start) {
2724 add_pes_stream(ts, pid, -1);
2725 tss = ts->pids[pid];
2730 tss->discard = discard_pid(ts, pid);
2733 ts->current_pid = pid;
2735 afc = (packet[3] >> 4) & 3;
2736 if (afc == 0) /* reserved value */
2738 has_adaptation = afc & 2;
2739 has_payload = afc & 1;
2740 is_discontinuity = has_adaptation &&
2741 packet[4] != 0 && /* with length > 0 */
2742 (packet[5] & 0x80); /* and discontinuity indicated */
2744 /* continuity check (currently not used) */
2745 cc = (packet[3] & 0xf);
2746 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2747 cc_ok = pid == 0x1FFF || // null packet PID
2754 av_log(ts->stream, AV_LOG_DEBUG,
2755 "Continuity check failed for pid %d expected %d got %d\n",
2756 pid, expected_cc, cc);
2757 if (tss->type == MPEGTS_PES) {
2758 PESContext *pc = tss->u.pes_filter.opaque;
2759 pc->flags |= AV_PKT_FLAG_CORRUPT;
2763 if (packet[1] & 0x80) {
2764 av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2765 if (tss->type == MPEGTS_PES) {
2766 PESContext *pc = tss->u.pes_filter.opaque;
2767 pc->flags |= AV_PKT_FLAG_CORRUPT;
2772 if (has_adaptation) {
2775 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2776 tss->last_pcr = pcr_h * 300 + pcr_l;
2777 /* skip adaptation field */
2780 /* if past the end of packet, ignore */
2781 p_end = packet + TS_PACKET_SIZE;
2782 if (p >= p_end || !has_payload)
2786 av_assert0(pos >= TS_PACKET_SIZE);
2787 ts->pos47_full = pos - TS_PACKET_SIZE;
2790 if (tss->type == MPEGTS_SECTION) {
2792 /* pointer field present */
2794 if (len > p_end - p)
2797 /* write remaining section bytes */
2798 write_section_data(ts, tss,
2800 /* check whether filter has been closed */
2806 write_section_data(ts, tss,
2811 write_section_data(ts, tss,
2816 // stop find_stream_info from waiting for more streams
2817 // when all programs have received a PMT
2818 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2820 for (i = 0; i < ts->nb_prg; i++) {
2821 if (!ts->prg[i].pmt_found)
2824 if (i == ts->nb_prg && ts->nb_prg > 0) {
2826 for (i = 0; i < ts->stream->nb_streams; i++) {
2827 AVStream *st = ts->stream->streams[i];
2828 if (st->codecpar->codec_type >= 0)
2829 types |= 1<<st->codecpar->codec_type;
2831 if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2832 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2833 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2840 // Note: The position here points actually behind the current packet.
2841 if (tss->type == MPEGTS_PES) {
2842 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2843 pos - ts->raw_packet_size)) < 0)
2851 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2853 MpegTSContext *ts = s->priv_data;
2854 AVIOContext *pb = s->pb;
2856 uint64_t pos = avio_tell(pb);
2857 int64_t back = FFMIN(seekback, pos);
2859 //Special case for files like 01c56b0dc1.ts
2860 if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2861 avio_seek(pb, 12 - back, SEEK_CUR);
2865 avio_seek(pb, -back, SEEK_CUR);
2867 for (i = 0; i < ts->resync_size; i++) {
2872 int new_packet_size, ret;
2873 avio_seek(pb, -1, SEEK_CUR);
2874 pos = avio_tell(pb);
2875 ret = ffio_ensure_seekback(pb, PROBE_PACKET_MAX_BUF);
2878 new_packet_size = get_packet_size(s);
2879 if (new_packet_size > 0 && new_packet_size != ts->raw_packet_size) {
2880 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", new_packet_size);
2881 ts->raw_packet_size = new_packet_size;
2883 avio_seek(pb, pos, SEEK_SET);
2887 av_log(s, AV_LOG_ERROR,
2888 "max resync size reached, could not find sync byte\n");
2890 return AVERROR_INVALIDDATA;
2893 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2894 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2895 const uint8_t **data)
2897 AVIOContext *pb = s->pb;
2901 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2902 if (len != TS_PACKET_SIZE)
2903 return len < 0 ? len : AVERROR_EOF;
2904 /* check packet sync byte */
2905 if ((*data)[0] != 0x47) {
2906 /* find a new packet start */
2908 if (mpegts_resync(s, raw_packet_size, *data) < 0)
2909 return AVERROR(EAGAIN);
2919 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2921 AVIOContext *pb = s->pb;
2922 int skip = raw_packet_size - TS_PACKET_SIZE;
2924 avio_skip(pb, skip);
2927 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2929 AVFormatContext *s = ts->stream;
2930 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2931 const uint8_t *data;
2935 if (avio_tell(s->pb) != ts->last_pos) {
2937 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2938 /* seek detected, flush pes buffer */
2939 for (i = 0; i < NB_PID_MAX; i++) {
2941 if (ts->pids[i]->type == MPEGTS_PES) {
2942 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2943 av_buffer_unref(&pes->buffer);
2944 pes->data_index = 0;
2945 pes->state = MPEGTS_SKIP; /* skip until pes header */
2946 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2947 ts->pids[i]->u.section_filter.last_ver = -1;
2949 ts->pids[i]->last_cc = -1;
2950 ts->pids[i]->last_pcr = -1;
2957 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2960 if (nb_packets != 0 && packet_num >= nb_packets ||
2961 ts->stop_parse > 1) {
2962 ret = AVERROR(EAGAIN);
2965 if (ts->stop_parse > 0)
2968 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2971 ret = handle_packet(ts, data, avio_tell(s->pb));
2972 finished_reading_packet(s, ts->raw_packet_size);
2976 ts->last_pos = avio_tell(s->pb);
2980 static int mpegts_probe(const AVProbeData *p)
2982 const int size = p->buf_size;
2986 int check_count = size / TS_FEC_PACKET_SIZE;
2987 #define CHECK_COUNT 10
2988 #define CHECK_BLOCK 100
2993 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2994 int left = FFMIN(check_count - i, CHECK_BLOCK);
2995 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2996 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2997 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2998 score = FFMAX3(score, dvhs_score, fec_score);
3000 maxscore = FFMAX(maxscore, score);
3003 sumscore = sumscore * CHECK_COUNT / check_count;
3004 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
3006 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
3008 if (check_count > CHECK_COUNT && sumscore > 6) {
3009 return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
3010 } else if (check_count >= CHECK_COUNT && sumscore > 6) {
3011 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3012 } else if (check_count >= CHECK_COUNT && maxscore > 6) {
3013 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3014 } else if (sumscore > 6) {
3021 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
3022 * (-1) if not available */
3023 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
3025 int afc, len, flags;
3029 afc = (packet[3] >> 4) & 3;
3031 return AVERROR_INVALIDDATA;
3036 return AVERROR_INVALIDDATA;
3039 if (!(flags & 0x10))
3040 return AVERROR_INVALIDDATA;
3042 return AVERROR_INVALIDDATA;
3044 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
3045 *ppcr_low = ((p[4] & 1) << 8) | p[5];
3049 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
3051 /* NOTE: We attempt to seek on non-seekable files as well, as the
3052 * probe buffer usually is big enough. Only warn if the seek failed
3053 * on files where the seek should work. */
3054 if (avio_seek(pb, pos, SEEK_SET) < 0)
3055 av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
3058 static int mpegts_read_header(AVFormatContext *s)
3060 MpegTSContext *ts = s->priv_data;
3061 AVIOContext *pb = s->pb;
3062 int64_t pos, probesize = s->probesize;
3063 int64_t seekback = FFMAX(s->probesize, (int64_t)ts->resync_size + PROBE_PACKET_MAX_BUF);
3065 s->internal->prefer_codec_framerate = 1;
3067 if (ffio_ensure_seekback(pb, seekback) < 0)
3068 av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
3070 pos = avio_tell(pb);
3071 ts->raw_packet_size = get_packet_size(s);
3072 if (ts->raw_packet_size <= 0) {
3073 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
3074 ts->raw_packet_size = TS_PACKET_SIZE;
3079 if (s->iformat == &ff_mpegts_demuxer) {
3082 /* first do a scan to get all the services */
3083 seek_back(s, pb, pos);
3085 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3086 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3087 mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
3089 handle_packets(ts, probesize / ts->raw_packet_size);
3090 /* if could not find service, enable auto_guess */
3094 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
3096 s->ctx_flags |= AVFMTCTX_NOHEADER;
3099 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
3100 int64_t pcrs[2], pcr_h;
3101 uint8_t packet[TS_PACKET_SIZE];
3102 const uint8_t *data;
3104 /* only read packets */
3106 st = avformat_new_stream(s, NULL);
3108 return AVERROR(ENOMEM);
3109 avpriv_set_pts_info(st, 60, 1, 27000000);
3110 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
3111 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
3113 /* we iterate until we find two PCRs to estimate the bitrate */
3118 ret = read_packet(s, packet, ts->raw_packet_size, &data);
3121 pid = AV_RB16(data + 1) & 0x1fff;
3122 if ((pcr_pid == -1 || pcr_pid == pid) &&
3123 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
3124 finished_reading_packet(s, ts->raw_packet_size);
3126 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
3129 if (pcrs[1] - pcrs[0] > 0) {
3130 /* the difference needs to be positive to make sense for bitrate computation */
3133 av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
3139 finished_reading_packet(s, ts->raw_packet_size);
3144 /* NOTE1: the bitrate is computed without the FEC */
3145 /* NOTE2: it is only the bitrate of the start of the stream */
3146 ts->pcr_incr = pcrs[1] - pcrs[0];
3147 ts->cur_pcr = pcrs[0] - ts->pcr_incr * (nb_packets - 1);
3148 s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
3149 st->codecpar->bit_rate = s->bit_rate;
3150 st->start_time = ts->cur_pcr;
3151 av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%"PRId64"\n",
3152 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
3155 seek_back(s, pb, pos);
3159 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
3161 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
3163 MpegTSContext *ts = s->priv_data;
3165 int64_t pcr_h, next_pcr_h, pos;
3166 int pcr_l, next_pcr_l;
3167 uint8_t pcr_buf[12];
3168 const uint8_t *data;
3170 if ((ret = av_new_packet(pkt, TS_PACKET_SIZE)) < 0)
3172 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
3173 pkt->pos = avio_tell(s->pb);
3177 if (data != pkt->data)
3178 memcpy(pkt->data, data, TS_PACKET_SIZE);
3179 finished_reading_packet(s, ts->raw_packet_size);
3180 if (ts->mpeg2ts_compute_pcr) {
3181 /* compute exact PCR for each packet */
3182 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
3183 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
3184 pos = avio_tell(s->pb);
3185 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
3186 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
3187 avio_read(s->pb, pcr_buf, 12);
3188 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
3189 /* XXX: not precise enough */
3191 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
3196 avio_seek(s->pb, pos, SEEK_SET);
3197 /* no next PCR found: we use previous increment */
3198 ts->cur_pcr = pcr_h * 300 + pcr_l;
3200 pkt->pts = ts->cur_pcr;
3201 pkt->duration = ts->pcr_incr;
3202 ts->cur_pcr += ts->pcr_incr;
3204 pkt->stream_index = 0;
3208 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
3210 MpegTSContext *ts = s->priv_data;
3215 ret = handle_packets(ts, 0);
3217 av_packet_unref(ts->pkt);
3218 /* flush pes data left */
3219 for (i = 0; i < NB_PID_MAX; i++)
3220 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
3221 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3222 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
3223 ret = new_pes_packet(pes, pkt);
3226 pes->state = MPEGTS_SKIP;
3233 if (!ret && pkt->size < 0)
3234 ret = AVERROR_INVALIDDATA;
3238 static void mpegts_free(MpegTSContext *ts)
3244 for (i = 0; i < FF_ARRAY_ELEMS(ts->pools); i++)
3245 av_buffer_pool_uninit(&ts->pools[i]);
3247 for (i = 0; i < NB_PID_MAX; i++)
3249 mpegts_close_filter(ts, ts->pids[i]);
3252 static int mpegts_read_close(AVFormatContext *s)
3254 MpegTSContext *ts = s->priv_data;
3259 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3260 int64_t *ppos, int64_t pos_limit)
3262 MpegTSContext *ts = s->priv_data;
3263 int64_t pos, timestamp;
3264 uint8_t buf[TS_PACKET_SIZE];
3265 int pcr_l, pcr_pid =
3266 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3267 int pos47 = ts->pos47_full % ts->raw_packet_size;
3269 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3270 ts->raw_packet_size + pos47;
3271 while(pos < pos_limit) {
3272 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3273 return AV_NOPTS_VALUE;
3274 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3275 return AV_NOPTS_VALUE;
3276 if (buf[0] != 0x47) {
3277 if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3278 return AV_NOPTS_VALUE;
3279 pos = avio_tell(s->pb);
3282 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3283 parse_pcr(×tamp, &pcr_l, buf) == 0) {
3287 pos += ts->raw_packet_size;
3290 return AV_NOPTS_VALUE;
3293 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3294 int64_t *ppos, int64_t pos_limit)
3296 MpegTSContext *ts = s->priv_data;
3298 int pos47 = ts->pos47_full % ts->raw_packet_size;
3299 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3300 ff_read_frame_flush(s);
3301 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3302 return AV_NOPTS_VALUE;
3303 while(pos < pos_limit) {
3306 av_init_packet(&pkt);
3307 ret = av_read_frame(s, &pkt);
3309 return AV_NOPTS_VALUE;
3310 if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
3311 ff_reduce_index(s, pkt.stream_index);
3312 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3313 if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
3314 int64_t dts = pkt.dts;
3316 av_packet_unref(&pkt);
3321 av_packet_unref(&pkt);
3324 return AV_NOPTS_VALUE;
3327 /**************************************************************/
3328 /* parsing functions - called from other demuxers such as RTP */
3330 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
3334 ts = av_mallocz(sizeof(MpegTSContext));
3337 /* no stream case, currently used by RTP */
3338 ts->raw_packet_size = TS_PACKET_SIZE;
3342 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3343 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3344 mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
3349 /* return the consumed length if a packet was output, or -1 if no
3350 * packet is output */
3351 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
3352 const uint8_t *buf, int len)
3360 if (len < TS_PACKET_SIZE)
3361 return AVERROR_INVALIDDATA;
3362 if (buf[0] != 0x47) {
3366 handle_packet(ts, buf, len1 - len + TS_PACKET_SIZE);
3367 buf += TS_PACKET_SIZE;
3368 len -= TS_PACKET_SIZE;
3369 if (ts->stop_parse == 1)
3376 void avpriv_mpegts_parse_close(MpegTSContext *ts)
3382 AVInputFormat ff_mpegts_demuxer = {
3384 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3385 .priv_data_size = sizeof(MpegTSContext),
3386 .read_probe = mpegts_probe,
3387 .read_header = mpegts_read_header,
3388 .read_packet = mpegts_read_packet,
3389 .read_close = mpegts_read_close,
3390 .read_timestamp = mpegts_get_dts,
3391 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3392 .priv_class = &mpegts_class,
3395 AVInputFormat ff_mpegtsraw_demuxer = {
3396 .name = "mpegtsraw",
3397 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3398 .priv_data_size = sizeof(MpegTSContext),
3399 .read_header = mpegts_read_header,
3400 .read_packet = mpegts_raw_read_packet,
3401 .read_close = mpegts_read_close,
3402 .read_timestamp = mpegts_get_dts,
3403 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3404 .priv_class = &mpegtsraw_class,