2 * MPEG-2 transport stream (aka DVB) demuxer
3 * Copyright (c) 2002-2003 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/buffer.h"
23 #include "libavutil/crc.h"
24 #include "libavutil/internal.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/log.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/mathematics.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/dovi_meta.h"
32 #include "libavcodec/bytestream.h"
33 #include "libavcodec/get_bits.h"
34 #include "libavcodec/opus.h"
38 #include "avio_internal.h"
45 /* maximum size in which we look for synchronization if
46 * synchronization is lost */
47 #define MAX_RESYNC_SIZE 65536
49 #define MAX_PES_PAYLOAD 200 * 1024
51 #define MAX_MP4_DESCR_COUNT 16
53 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
55 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
56 (modulus) = (dividend) % (divisor); \
57 (prev_dividend) = (dividend); \
60 #define PROBE_PACKET_MAX_BUF 8192
61 #define PROBE_PACKET_MARGIN 5
63 enum MpegTSFilterType {
69 typedef struct MpegTSFilter MpegTSFilter;
71 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
72 int is_start, int64_t pos);
74 typedef struct MpegTSPESFilter {
79 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
81 typedef void SetServiceCallback (void *opaque, int ret);
83 typedef struct MpegTSSectionFilter {
90 unsigned int check_crc : 1;
91 unsigned int end_of_section_reached : 1;
92 SectionCallback *section_cb;
94 } MpegTSSectionFilter;
99 int last_cc; /* last cc code (-1 if first packet) */
102 enum MpegTSFilterType type;
104 MpegTSPESFilter pes_filter;
105 MpegTSSectionFilter section_filter;
109 #define MAX_PIDS_PER_PROGRAM 64
111 unsigned int id; // program id/service id
112 unsigned int nb_pids;
113 unsigned int pids[MAX_PIDS_PER_PROGRAM];
115 /** have we found pmt for this program */
119 struct MpegTSContext {
120 const AVClass *class;
122 AVFormatContext *stream;
123 /** raw packet size, including FEC if present */
128 #define SIZE_STAT_THRESHOLD 10
132 /** if true, all pids are analyzed to find streams */
135 /** compute exact PCR for each transport stream packet */
136 int mpeg2ts_compute_pcr;
138 /** fix dvb teletext pts */
139 int fix_teletext_pts;
141 int64_t cur_pcr; /**< used to estimate the exact PCR */
142 int pcr_incr; /**< used to estimate the exact PCR */
144 /* data needed to handle file based ts */
145 /** stop parsing loop */
147 /** packet containing Audio/Video data */
149 /** to detect seek */
154 int skip_unknown_pmt;
159 int merge_pmt_versions;
161 /******************************************/
162 /* private mpegts data */
164 /** structure to keep track of Program->pids mapping */
168 int8_t crc_validity[NB_PID_MAX];
169 /** filters for various streams specified by PMT + for the PAT and PMT */
170 MpegTSFilter *pids[NB_PID_MAX];
173 AVStream *epg_stream;
174 AVBufferPool* pools[32];
177 #define MPEGTS_OPTIONS \
178 { "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 }
180 static const AVOption options[] = {
182 {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
183 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
184 {"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
185 {.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
186 {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
187 {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
188 {"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
189 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
190 {"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
191 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
192 {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
193 {.i64 = 0}, 0, 1, 0 },
194 {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
195 {.i64 = 0}, 0, 1, 0 },
199 static const AVClass mpegts_class = {
200 .class_name = "mpegts demuxer",
201 .item_name = av_default_item_name,
203 .version = LIBAVUTIL_VERSION_INT,
206 static const AVOption raw_options[] = {
208 { "compute_pcr", "compute exact PCR for each transport stream packet",
209 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
210 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
211 { "ts_packetsize", "output option carrying the raw packet size",
212 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
214 AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
218 static const AVClass mpegtsraw_class = {
219 .class_name = "mpegtsraw demuxer",
220 .item_name = av_default_item_name,
221 .option = raw_options,
222 .version = LIBAVUTIL_VERSION_INT,
225 /* TS stream handling */
230 MPEGTS_PESHEADER_FILL,
235 /* enough for PES header + length */
236 #define PES_START_SIZE 6
237 #define PES_HEADER_SIZE 9
238 #define MAX_PES_HEADER_SIZE (9 + 255)
240 typedef struct PESContext {
242 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
245 AVFormatContext *stream;
247 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
248 enum MpegTSState state;
249 /* used to get the format */
251 int flags; /**< copied to the AVPacket flags */
254 int extended_stream_id;
257 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
258 uint8_t header[MAX_PES_HEADER_SIZE];
264 extern AVInputFormat ff_mpegts_demuxer;
266 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
269 for (i = 0; i < ts->nb_prg; i++) {
270 if (ts->prg[i].id == programid) {
277 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
279 AVProgram *prg = NULL;
282 for (i = 0; i < ts->stream->nb_programs; i++)
283 if (ts->stream->programs[i]->id == programid) {
284 prg = ts->stream->programs[i];
289 prg->nb_stream_indexes = 0;
292 static void clear_program(MpegTSContext *ts, unsigned int programid)
296 clear_avprogram(ts, programid);
297 for (i = 0; i < ts->nb_prg; i++)
298 if (ts->prg[i].id == programid) {
299 ts->prg[i].nb_pids = 0;
300 ts->prg[i].pmt_found = 0;
304 static void clear_programs(MpegTSContext *ts)
310 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
313 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
317 p = &ts->prg[ts->nb_prg];
324 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
327 struct Program *p = get_program(ts, programid);
332 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
335 for (i = 0; i < p->nb_pids; i++)
336 if (p->pids[i] == pid)
339 p->pids[p->nb_pids++] = pid;
342 static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
344 struct Program *p = get_program(ts, programid);
351 static void update_av_program_info(AVFormatContext *s, unsigned int programid,
352 unsigned int pid, int version)
355 for (i = 0; i < s->nb_programs; i++) {
356 AVProgram *program = s->programs[i];
357 if (program->id == programid) {
358 int old_pcr_pid = program->pcr_pid,
359 old_version = program->pmt_version;
360 program->pcr_pid = pid;
361 program->pmt_version = version;
363 if (old_version != -1 && old_version != version) {
364 av_log(s, AV_LOG_VERBOSE,
365 "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
366 programid, old_version, version, old_pcr_pid, pid);
374 * @brief discard_pid() decides if the pid is to be discarded according
375 * to caller's programs selection
376 * @param ts : - TS context
378 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
381 static int discard_pid(MpegTSContext *ts, unsigned int pid)
384 int used = 0, discarded = 0;
387 /* If none of the programs have .discard=AVDISCARD_ALL then there's
388 * no way we have to discard this packet */
389 for (k = 0; k < ts->stream->nb_programs; k++)
390 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
392 if (k == ts->stream->nb_programs)
395 for (i = 0; i < ts->nb_prg; i++) {
397 for (j = 0; j < p->nb_pids; j++) {
398 if (p->pids[j] != pid)
400 // is program with id p->id set to be discarded?
401 for (k = 0; k < ts->stream->nb_programs; k++) {
402 if (ts->stream->programs[k]->id == p->id) {
403 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
412 return !used && discarded;
416 * Assemble PES packets out of TS packets, and then call the "section_cb"
417 * function when they are complete.
419 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
420 const uint8_t *buf, int buf_size, int is_start)
422 MpegTSSectionFilter *tss = &tss1->u.section_filter;
423 uint8_t *cur_section_buf = NULL;
427 memcpy(tss->section_buf, buf, buf_size);
428 tss->section_index = buf_size;
429 tss->section_h_size = -1;
430 tss->end_of_section_reached = 0;
432 if (tss->end_of_section_reached)
434 len = MAX_SECTION_SIZE - tss->section_index;
437 memcpy(tss->section_buf + tss->section_index, buf, len);
438 tss->section_index += len;
442 cur_section_buf = tss->section_buf;
443 while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
444 /* compute section length if possible */
445 if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
446 len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
447 if (len > MAX_SECTION_SIZE)
449 tss->section_h_size = len;
452 if (tss->section_h_size != -1 &&
453 tss->section_index >= offset + tss->section_h_size) {
455 tss->end_of_section_reached = 1;
457 if (tss->check_crc) {
458 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
459 if (tss->section_h_size >= 4)
460 tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
463 ts->crc_validity[ tss1->pid ] = 100;
464 }else if (ts->crc_validity[ tss1->pid ] > -10) {
465 ts->crc_validity[ tss1->pid ]--;
470 tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
475 cur_section_buf += tss->section_h_size;
476 offset += tss->section_h_size;
477 tss->section_h_size = -1;
479 tss->section_h_size = -1;
480 tss->end_of_section_reached = 0;
486 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
487 enum MpegTSFilterType type)
489 MpegTSFilter *filter;
491 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
493 if (pid >= NB_PID_MAX || ts->pids[pid])
495 filter = av_mallocz(sizeof(MpegTSFilter));
498 ts->pids[pid] = filter;
503 filter->last_cc = -1;
504 filter->last_pcr= -1;
509 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
511 SectionCallback *section_cb,
515 MpegTSFilter *filter;
516 MpegTSSectionFilter *sec;
518 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
520 sec = &filter->u.section_filter;
521 sec->section_cb = section_cb;
522 sec->opaque = opaque;
523 sec->section_buf = av_mallocz(MAX_SECTION_SIZE);
524 sec->check_crc = check_crc;
527 if (!sec->section_buf) {
534 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
538 MpegTSFilter *filter;
539 MpegTSPESFilter *pes;
541 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
544 pes = &filter->u.pes_filter;
545 pes->pes_cb = pes_cb;
546 pes->opaque = opaque;
550 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
552 return mpegts_open_filter(ts, pid, MPEGTS_PCR);
555 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
560 if (filter->type == MPEGTS_SECTION)
561 av_freep(&filter->u.section_filter.section_buf);
562 else if (filter->type == MPEGTS_PES) {
563 PESContext *pes = filter->u.pes_filter.opaque;
564 av_buffer_unref(&pes->buffer);
565 /* referenced private data will be freed later in
566 * avformat_close_input (pes->st->priv_data == pes) */
567 if (!pes->st || pes->merged_st) {
568 av_freep(&filter->u.pes_filter.opaque);
573 ts->pids[pid] = NULL;
576 static int analyze(const uint8_t *buf, int size, int packet_size,
579 int stat[TS_MAX_PACKET_SIZE];
584 memset(stat, 0, packet_size * sizeof(*stat));
586 for (i = 0; i < size - 3; i++) {
587 if (buf[i] == 0x47) {
588 int pid = AV_RB16(buf+1) & 0x1FFF;
589 int asc = buf[i + 3] & 0x30;
590 if (!probe || pid == 0x1FFF || asc) {
591 int x = i % packet_size;
594 if (stat[x] > best_score) {
595 best_score = stat[x];
601 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
604 /* autodetect fec presence */
605 static int get_packet_size(AVFormatContext* s)
607 int score, fec_score, dvhs_score;
611 /*init buffer to store stream for probing */
612 uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
615 while (buf_size < PROBE_PACKET_MAX_BUF) {
616 ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
618 return AVERROR_INVALIDDATA;
621 score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
622 dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
623 fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
624 av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
625 buf_size, score, dvhs_score, fec_score);
627 margin = mid_pred(score, fec_score, dvhs_score);
629 if (buf_size < PROBE_PACKET_MAX_BUF)
630 margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
633 return TS_PACKET_SIZE;
634 else if (dvhs_score > margin)
635 return TS_DVHS_PACKET_SIZE;
636 else if (fec_score > margin)
637 return TS_FEC_PACKET_SIZE;
639 return AVERROR_INVALIDDATA;
642 typedef struct SectionHeader {
647 uint8_t last_sec_num;
650 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
652 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
655 tssf->last_ver = h->version;
656 tssf->last_crc = tssf->crc;
661 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
668 return AVERROR_INVALIDDATA;
674 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
681 return AVERROR_INVALIDDATA;
688 /* read and allocate a DVB string preceded by its length */
689 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
696 len = get8(&p, p_end);
703 const char *encodings[] = {
704 "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
705 "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
706 "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
707 "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
708 "", "", "", "", "", "", "", ""
712 size_t inlen = len, outlen = inlen * 6 + 1;
713 if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
715 snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
718 cd = iconv_open("UTF-8", iso8859);
719 } else if (p[0] < 0x20) {
722 cd = iconv_open("UTF-8", encodings[*p]);
725 cd = iconv_open("UTF-8", encodings[0]);
727 if (cd == (iconv_t)-1)
729 str = out = av_malloc(outlen);
734 if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
746 str = av_malloc(len + 1);
756 static int parse_section_header(SectionHeader *h,
757 const uint8_t **pp, const uint8_t *p_end)
761 val = get8(pp, p_end);
766 val = get16(pp, p_end);
770 val = get8(pp, p_end);
773 h->version = (val >> 1) & 0x1f;
774 val = get8(pp, p_end);
778 val = get8(pp, p_end);
781 h->last_sec_num = val;
785 typedef struct StreamType {
786 uint32_t stream_type;
787 enum AVMediaType codec_type;
788 enum AVCodecID codec_id;
791 static const StreamType ISO_types[] = {
792 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
793 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
794 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
795 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
796 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
797 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
798 /* Makito encoder sets stream type 0x11 for AAC,
799 * so auto-detect LOAS/LATM instead of hardcoding it. */
800 #if !CONFIG_LOAS_DEMUXER
801 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
803 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
804 { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
805 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
806 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
807 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
808 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
809 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
810 { 0xd2, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS2 },
811 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
815 static const StreamType HDMV_types[] = {
816 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
817 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
818 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
819 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
820 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
821 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
822 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
823 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
824 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
825 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
826 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
831 static const StreamType SCTE_types[] = {
832 { 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
837 static const StreamType MISC_types[] = {
838 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
839 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
843 static const StreamType REGD_types[] = {
844 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
845 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
846 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
847 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
848 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
849 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
850 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
851 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
852 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
853 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
854 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
855 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
859 static const StreamType METADATA_types[] = {
860 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
861 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
865 /* descriptor present */
866 static const StreamType DESC_types[] = {
867 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
868 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
869 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
870 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
871 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
875 static void mpegts_find_stream_type(AVStream *st,
876 uint32_t stream_type,
877 const StreamType *types)
879 for (; types->stream_type; types++)
880 if (stream_type == types->stream_type) {
881 if (st->codecpar->codec_type != types->codec_type ||
882 st->codecpar->codec_id != types->codec_id) {
883 st->codecpar->codec_type = types->codec_type;
884 st->codecpar->codec_id = types->codec_id;
885 st->internal->need_context_update = 1;
887 st->request_probe = 0;
892 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
893 uint32_t stream_type, uint32_t prog_reg_desc)
895 int old_codec_type = st->codecpar->codec_type;
896 int old_codec_id = st->codecpar->codec_id;
897 int old_codec_tag = st->codecpar->codec_tag;
899 if (avcodec_is_open(st->internal->avctx)) {
900 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
904 avpriv_set_pts_info(st, 33, 1, 90000);
906 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
907 st->codecpar->codec_id = AV_CODEC_ID_NONE;
908 st->need_parsing = AVSTREAM_PARSE_FULL;
910 pes->stream_type = stream_type;
912 av_log(pes->stream, AV_LOG_DEBUG,
913 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
914 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
916 st->codecpar->codec_tag = pes->stream_type;
918 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
919 if (pes->stream_type == 4 || pes->stream_type == 0x0f)
920 st->request_probe = 50;
921 if ((prog_reg_desc == AV_RL32("HDMV") ||
922 prog_reg_desc == AV_RL32("HDPR")) &&
923 st->codecpar->codec_id == AV_CODEC_ID_NONE) {
924 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
925 if (pes->stream_type == 0x83) {
926 // HDMV TrueHD streams also contain an AC3 coded version of the
927 // audio track - add a second stream for this
929 // priv_data cannot be shared between streams
930 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
932 return AVERROR(ENOMEM);
933 memcpy(sub_pes, pes, sizeof(*sub_pes));
935 sub_st = avformat_new_stream(pes->stream, NULL);
938 return AVERROR(ENOMEM);
941 sub_st->id = pes->pid;
942 avpriv_set_pts_info(sub_st, 33, 1, 90000);
943 sub_st->priv_data = sub_pes;
944 sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
945 sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
946 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
947 sub_pes->sub_st = pes->sub_st = sub_st;
950 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
951 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
952 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
953 st->codecpar->codec_id = old_codec_id;
954 st->codecpar->codec_type = old_codec_type;
956 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
957 (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
958 st->probe_packets > 0 &&
959 stream_type == STREAM_TYPE_PRIVATE_DATA) {
960 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
961 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
962 st->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
965 /* queue a context update if properties changed */
966 if (old_codec_type != st->codecpar->codec_type ||
967 old_codec_id != st->codecpar->codec_id ||
968 old_codec_tag != st->codecpar->codec_tag)
969 st->internal->need_context_update = 1;
974 static void reset_pes_packet_state(PESContext *pes)
976 pes->pts = AV_NOPTS_VALUE;
977 pes->dts = AV_NOPTS_VALUE;
980 av_buffer_unref(&pes->buffer);
983 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
986 pkt->data = (uint8_t *)buffer;
990 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
996 pkt->buf = pes->buffer;
997 pkt->data = pes->buffer->data;
998 pkt->size = pes->data_index;
1000 if (pes->total_size != MAX_PES_PAYLOAD &&
1001 pes->pes_header_size + pes->data_index != pes->total_size +
1003 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
1004 pes->flags |= AV_PKT_FLAG_CORRUPT;
1006 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1008 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
1009 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
1010 pkt->stream_index = pes->sub_st->index;
1012 pkt->stream_index = pes->st->index;
1013 pkt->pts = pes->pts;
1014 pkt->dts = pes->dts;
1015 /* store position of first TS packet of this PES packet */
1016 pkt->pos = pes->ts_packet_pos;
1017 pkt->flags = pes->flags;
1020 reset_pes_packet_state(pes);
1022 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
1024 return AVERROR(ENOMEM);
1025 *sd = pes->stream_id;
1030 static uint64_t get_ts64(GetBitContext *gb, int bits)
1032 if (get_bits_left(gb) < bits)
1033 return AV_NOPTS_VALUE;
1034 return get_bits64(gb, bits);
1037 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
1038 const uint8_t *buf, int buf_size)
1041 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1042 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1043 int dts_flag = -1, cts_flag = -1;
1044 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1045 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1046 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1048 memcpy(buf_padded, buf, buf_padded_size);
1050 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1052 if (sl->use_au_start)
1053 au_start_flag = get_bits1(&gb);
1055 au_end_flag = get_bits1(&gb);
1056 if (!sl->use_au_start && !sl->use_au_end)
1057 au_start_flag = au_end_flag = 1;
1058 if (sl->ocr_len > 0)
1059 ocr_flag = get_bits1(&gb);
1061 idle_flag = get_bits1(&gb);
1062 if (sl->use_padding)
1063 padding_flag = get_bits1(&gb);
1065 padding_bits = get_bits(&gb, 3);
1067 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1068 if (sl->packet_seq_num_len)
1069 skip_bits_long(&gb, sl->packet_seq_num_len);
1070 if (sl->degr_prior_len)
1072 skip_bits(&gb, sl->degr_prior_len);
1074 skip_bits_long(&gb, sl->ocr_len);
1075 if (au_start_flag) {
1076 if (sl->use_rand_acc_pt)
1078 if (sl->au_seq_num_len > 0)
1079 skip_bits_long(&gb, sl->au_seq_num_len);
1080 if (sl->use_timestamps) {
1081 dts_flag = get_bits1(&gb);
1082 cts_flag = get_bits1(&gb);
1085 if (sl->inst_bitrate_len)
1086 inst_bitrate_flag = get_bits1(&gb);
1088 dts = get_ts64(&gb, sl->timestamp_len);
1090 cts = get_ts64(&gb, sl->timestamp_len);
1092 skip_bits_long(&gb, sl->au_len);
1093 if (inst_bitrate_flag)
1094 skip_bits_long(&gb, sl->inst_bitrate_len);
1097 if (dts != AV_NOPTS_VALUE)
1099 if (cts != AV_NOPTS_VALUE)
1102 if (sl->timestamp_len && sl->timestamp_res)
1103 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1105 return (get_bits_count(&gb) + 7) >> 3;
1108 static AVBufferRef *buffer_pool_get(MpegTSContext *ts, int size)
1110 int index = av_log2(size + AV_INPUT_BUFFER_PADDING_SIZE);
1111 if (!ts->pools[index]) {
1112 int pool_size = FFMIN(MAX_PES_PAYLOAD + AV_INPUT_BUFFER_PADDING_SIZE, 2 << index);
1113 ts->pools[index] = av_buffer_pool_init(pool_size, NULL);
1114 if (!ts->pools[index])
1117 return av_buffer_pool_get(ts->pools[index]);
1120 /* return non zero if a packet could be constructed */
1121 static int mpegts_push_data(MpegTSFilter *filter,
1122 const uint8_t *buf, int buf_size, int is_start,
1125 PESContext *pes = filter->u.pes_filter.opaque;
1126 MpegTSContext *ts = pes->ts;
1134 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1135 ret = new_pes_packet(pes, ts->pkt);
1140 reset_pes_packet_state(pes);
1142 pes->state = MPEGTS_HEADER;
1143 pes->ts_packet_pos = pos;
1146 while (buf_size > 0) {
1147 switch (pes->state) {
1149 len = PES_START_SIZE - pes->data_index;
1152 memcpy(pes->header + pes->data_index, p, len);
1153 pes->data_index += len;
1156 if (pes->data_index == PES_START_SIZE) {
1157 /* we got all the PES or section header. We can now
1159 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1160 pes->header[2] == 0x01) {
1161 /* it must be an MPEG-2 PES stream */
1162 code = pes->header[3] | 0x100;
1163 av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1165 pes->stream_id = pes->header[3];
1167 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1169 pes->sub_st->discard == AVDISCARD_ALL)) ||
1170 code == 0x1be) /* padding_stream */
1173 /* stream not present in PMT */
1175 if (ts->skip_changes)
1177 if (ts->merge_pmt_versions)
1178 goto skip; /* wait for PMT to merge new stream */
1180 pes->st = avformat_new_stream(ts->stream, NULL);
1182 return AVERROR(ENOMEM);
1183 pes->st->id = pes->pid;
1184 mpegts_set_stream_info(pes->st, pes, 0, 0);
1187 pes->total_size = AV_RB16(pes->header + 4);
1188 /* NOTE: a zero total size means the PES size is
1190 if (!pes->total_size)
1191 pes->total_size = MAX_PES_PAYLOAD;
1193 /* allocate pes buffer */
1194 pes->buffer = buffer_pool_get(ts, pes->total_size);
1196 return AVERROR(ENOMEM);
1198 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1199 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1200 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1201 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1202 pes->state = MPEGTS_PESHEADER;
1203 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1204 av_log(pes->stream, AV_LOG_TRACE,
1205 "pid=%x stream_type=%x probing\n",
1208 pes->st->request_probe = 1;
1211 pes->pes_header_size = 6;
1212 pes->state = MPEGTS_PAYLOAD;
1213 pes->data_index = 0;
1216 /* otherwise, it should be a table */
1219 pes->state = MPEGTS_SKIP;
1224 /**********************************************/
1225 /* PES packing parsing */
1226 case MPEGTS_PESHEADER:
1227 len = PES_HEADER_SIZE - pes->data_index;
1229 return AVERROR_INVALIDDATA;
1232 memcpy(pes->header + pes->data_index, p, len);
1233 pes->data_index += len;
1236 if (pes->data_index == PES_HEADER_SIZE) {
1237 pes->pes_header_size = pes->header[8] + 9;
1238 pes->state = MPEGTS_PESHEADER_FILL;
1241 case MPEGTS_PESHEADER_FILL:
1242 len = pes->pes_header_size - pes->data_index;
1244 return AVERROR_INVALIDDATA;
1247 memcpy(pes->header + pes->data_index, p, len);
1248 pes->data_index += len;
1251 if (pes->data_index == pes->pes_header_size) {
1253 unsigned int flags, pes_ext, skip;
1255 flags = pes->header[7];
1256 r = pes->header + 9;
1257 pes->pts = AV_NOPTS_VALUE;
1258 pes->dts = AV_NOPTS_VALUE;
1259 if ((flags & 0xc0) == 0x80) {
1260 pes->dts = pes->pts = ff_parse_pes_pts(r);
1262 } else if ((flags & 0xc0) == 0xc0) {
1263 pes->pts = ff_parse_pes_pts(r);
1265 pes->dts = ff_parse_pes_pts(r);
1268 pes->extended_stream_id = -1;
1269 if (flags & 0x01) { /* PES extension */
1271 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1272 skip = (pes_ext >> 4) & 0xb;
1275 if ((pes_ext & 0x41) == 0x01 &&
1276 (r + 2) <= (pes->header + pes->pes_header_size)) {
1277 /* PES extension 2 */
1278 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1279 pes->extended_stream_id = r[1];
1283 /* we got the full header. We parse it and get the payload */
1284 pes->state = MPEGTS_PAYLOAD;
1285 pes->data_index = 0;
1286 if (pes->stream_type == 0x12 && buf_size > 0) {
1287 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1289 pes->pes_header_size += sl_header_bytes;
1290 p += sl_header_bytes;
1291 buf_size -= sl_header_bytes;
1293 if (pes->stream_type == 0x15 && buf_size >= 5) {
1294 /* skip metadata access unit header */
1295 pes->pes_header_size += 5;
1299 if ( pes->ts->fix_teletext_pts
1300 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1301 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1303 AVProgram *p = NULL;
1305 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1306 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1307 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1309 AVStream *st = NULL;
1310 if (f->type == MPEGTS_PES) {
1311 PESContext *pcrpes = f->u.pes_filter.opaque;
1314 } else if (f->type == MPEGTS_PCR) {
1316 for (i = 0; i < p->nb_stream_indexes; i++) {
1317 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1318 if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1322 if (f->last_pcr != -1 && !f->discard) {
1323 // teletext packets do not always have correct timestamps,
1324 // the standard says they should be handled after 40.6 ms at most,
1325 // and the pcr error to this packet should be no more than 100 ms.
1326 // TODO: we should interpolate the PCR, not just use the last one
1327 int64_t pcr = f->last_pcr / 300;
1330 pes->st->pts_wrap_reference = st->pts_wrap_reference;
1331 pes->st->pts_wrap_behavior = st->pts_wrap_behavior;
1333 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1334 pes->pts = pes->dts = pcr;
1335 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1336 pes->dts > pcr + 3654 + 9000) {
1337 pes->pts = pes->dts = pcr + 3654 + 9000;
1338 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1339 pes->dts > pcr + 10*90000) { //10sec
1340 pes->pts = pes->dts = pcr + 3654 + 9000;
1349 av_log(pes->stream, AV_LOG_VERBOSE,
1350 "Forcing DTS/PTS to be unset for a "
1351 "non-trustworthy PES packet for PID %d as "
1352 "PCR hasn't been received yet.\n",
1354 pes->dts = pes->pts = AV_NOPTS_VALUE;
1359 case MPEGTS_PAYLOAD:
1361 if (pes->data_index > 0 &&
1362 pes->data_index + buf_size > pes->total_size) {
1363 ret = new_pes_packet(pes, ts->pkt);
1366 pes->total_size = MAX_PES_PAYLOAD;
1367 pes->buffer = buffer_pool_get(ts, pes->total_size);
1369 return AVERROR(ENOMEM);
1371 } else if (pes->data_index == 0 &&
1372 buf_size > pes->total_size) {
1373 // pes packet size is < ts size packet and pes data is padded with 0xff
1374 // not sure if this is legal in ts but see issue #2392
1375 buf_size = pes->total_size;
1377 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1378 pes->data_index += buf_size;
1379 /* emit complete packets with known packet size
1380 * decreases demuxer delay for infrequent packets like subtitles from
1381 * a couple of seconds to milliseconds for properly muxed files.
1382 * total_size is the number of bytes following pes_packet_length
1383 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1384 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1385 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1387 ret = new_pes_packet(pes, ts->pkt);
1403 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1408 /* if no pid found, then add a pid context */
1409 pes = av_mallocz(sizeof(PESContext));
1413 pes->stream = ts->stream;
1415 pes->pcr_pid = pcr_pid;
1416 pes->state = MPEGTS_SKIP;
1417 pes->pts = AV_NOPTS_VALUE;
1418 pes->dts = AV_NOPTS_VALUE;
1419 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1428 typedef struct MP4DescrParseContext {
1432 Mp4Descr *active_descr;
1434 int max_descr_count;
1436 int predefined_SLConfigDescriptor_seen;
1437 } MP4DescrParseContext;
1439 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1440 const uint8_t *buf, unsigned size,
1441 Mp4Descr *descr, int max_descr_count)
1444 if (size > (1 << 30))
1445 return AVERROR_INVALIDDATA;
1447 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1448 NULL, NULL, NULL, NULL)) < 0)
1455 d->active_descr = NULL;
1456 d->max_descr_count = max_descr_count;
1461 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1463 int64_t new_off = avio_tell(pb);
1464 (*len) -= new_off - *off;
1468 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1471 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1474 int ret = parse_mp4_descr(d, off, len, 0);
1477 update_offsets(&d->pb, &off, &len);
1482 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1484 avio_rb16(&d->pb); // ID
1490 update_offsets(&d->pb, &off, &len);
1491 return parse_mp4_descr_arr(d, off, len);
1494 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1499 id_flags = avio_rb16(&d->pb);
1500 if (!(id_flags & 0x0020)) { // URL_Flag
1501 update_offsets(&d->pb, &off, &len);
1502 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1508 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1513 if (d->descr_count >= d->max_descr_count)
1514 return AVERROR_INVALIDDATA;
1515 ff_mp4_parse_es_descr(&d->pb, &es_id);
1516 d->active_descr = d->descr + (d->descr_count++);
1518 d->active_descr->es_id = es_id;
1519 update_offsets(&d->pb, &off, &len);
1520 if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1522 update_offsets(&d->pb, &off, &len);
1524 ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1525 d->active_descr = NULL;
1529 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1532 Mp4Descr *descr = d->active_descr;
1534 return AVERROR_INVALIDDATA;
1535 d->active_descr->dec_config_descr = av_malloc(len);
1536 if (!descr->dec_config_descr)
1537 return AVERROR(ENOMEM);
1538 descr->dec_config_descr_len = len;
1539 avio_read(&d->pb, descr->dec_config_descr, len);
1543 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1545 Mp4Descr *descr = d->active_descr;
1548 return AVERROR_INVALIDDATA;
1550 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1551 descr->sl.dst = avio_r8(&d->pb); \
1552 if (descr->sl.dst > maxv) { \
1553 descr->sl.dst = maxv; \
1554 return AVERROR_INVALIDDATA; \
1558 predefined = avio_r8(&d->pb);
1561 int flags = avio_r8(&d->pb);
1562 descr->sl.use_au_start = !!(flags & 0x80);
1563 descr->sl.use_au_end = !!(flags & 0x40);
1564 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1565 descr->sl.use_padding = !!(flags & 0x08);
1566 descr->sl.use_timestamps = !!(flags & 0x04);
1567 descr->sl.use_idle = !!(flags & 0x02);
1568 descr->sl.timestamp_res = avio_rb32(&d->pb);
1570 R8_CHECK_CLIP_MAX(timestamp_len, 63);
1571 R8_CHECK_CLIP_MAX(ocr_len, 63);
1572 R8_CHECK_CLIP_MAX(au_len, 31);
1573 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1574 lengths = avio_rb16(&d->pb);
1575 descr->sl.degr_prior_len = lengths >> 12;
1576 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1577 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1578 } else if (!d->predefined_SLConfigDescriptor_seen){
1579 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1580 d->predefined_SLConfigDescriptor_seen = 1;
1585 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1589 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1592 update_offsets(&d->pb, &off, &len);
1593 if (len < 0 || len1 > len || len1 <= 0) {
1594 av_log(d->s, AV_LOG_ERROR,
1595 "Tag %x length violation new length %d bytes remaining %d\n",
1597 return AVERROR_INVALIDDATA;
1600 if (d->level++ >= MAX_LEVEL) {
1601 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1602 ret = AVERROR_INVALIDDATA;
1606 if (target_tag && tag != target_tag) {
1607 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1609 ret = AVERROR_INVALIDDATA;
1615 ret = parse_MP4IODescrTag(d, off, len1);
1618 ret = parse_MP4ODescrTag(d, off, len1);
1621 ret = parse_MP4ESDescrTag(d, off, len1);
1623 case MP4DecConfigDescrTag:
1624 ret = parse_MP4DecConfigDescrTag(d, off, len1);
1627 ret = parse_MP4SLDescrTag(d, off, len1);
1634 avio_seek(&d->pb, off + len1, SEEK_SET);
1638 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1639 Mp4Descr *descr, int *descr_count, int max_descr_count)
1641 MP4DescrParseContext d;
1644 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1648 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1650 *descr_count = d.descr_count;
1654 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1655 Mp4Descr *descr, int *descr_count, int max_descr_count)
1657 MP4DescrParseContext d;
1660 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1664 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1666 *descr_count = d.descr_count;
1670 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1673 MpegTSContext *ts = filter->u.section_filter.opaque;
1674 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1676 const uint8_t *p, *p_end;
1678 int mp4_descr_count = 0;
1679 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1681 AVFormatContext *s = ts->stream;
1683 p_end = section + section_len - 4;
1685 if (parse_section_header(&h, &p, p_end) < 0)
1687 if (h.tid != M4OD_TID)
1689 if (skip_identical(&h, tssf))
1692 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1693 MAX_MP4_DESCR_COUNT);
1695 for (pid = 0; pid < NB_PID_MAX; pid++) {
1698 for (i = 0; i < mp4_descr_count; i++) {
1701 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1703 if (ts->pids[pid]->type != MPEGTS_PES) {
1704 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1707 pes = ts->pids[pid]->u.pes_filter.opaque;
1712 pes->sl = mp4_descr[i].sl;
1714 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1715 mp4_descr[i].dec_config_descr_len, 0,
1716 NULL, NULL, NULL, NULL);
1717 ff_mp4_read_dec_config_descr(s, st, &pb);
1718 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1719 st->codecpar->extradata_size > 0)
1720 st->need_parsing = 0;
1721 if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1722 st->codecpar->extradata_size > 0)
1723 st->need_parsing = 0;
1725 st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1726 st->internal->need_context_update = 1;
1729 for (i = 0; i < mp4_descr_count; i++)
1730 av_free(mp4_descr[i].dec_config_descr);
1733 static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1736 AVProgram *prg = NULL;
1737 MpegTSContext *ts = filter->u.section_filter.opaque;
1739 int idx = ff_find_stream_index(ts->stream, filter->pid);
1744 * In case we receive an SCTE-35 packet before mpegts context is fully
1750 new_data_packet(section, section_len, ts->pkt);
1751 ts->pkt->stream_index = idx;
1752 prg = av_find_program_from_stream(ts->stream, NULL, idx);
1753 if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1754 MpegTSFilter *f = ts->pids[prg->pcr_pid];
1755 if (f && f->last_pcr != -1)
1756 ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1762 static const uint8_t opus_coupled_stream_cnt[9] = {
1763 1, 0, 1, 1, 2, 2, 2, 3, 3
1766 static const uint8_t opus_stream_cnt[9] = {
1767 1, 1, 1, 2, 2, 3, 4, 4, 5,
1770 static const uint8_t opus_channel_map[8][8] = {
1778 { 0,6,1,2,3,4,5,7 },
1781 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1782 const uint8_t **pp, const uint8_t *desc_list_end,
1783 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1786 const uint8_t *desc_end;
1787 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1791 desc_tag = get8(pp, desc_list_end);
1793 return AVERROR_INVALIDDATA;
1794 desc_len = get8(pp, desc_list_end);
1796 return AVERROR_INVALIDDATA;
1797 desc_end = *pp + desc_len;
1798 if (desc_end > desc_list_end)
1799 return AVERROR_INVALIDDATA;
1801 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1803 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1804 stream_type == STREAM_TYPE_PRIVATE_DATA)
1805 mpegts_find_stream_type(st, desc_tag, DESC_types);
1808 case 0x02: /* video stream descriptor */
1809 if (get8(pp, desc_end) & 0x1) {
1810 st->disposition |= AV_DISPOSITION_STILL_IMAGE;
1813 case 0x1E: /* SL descriptor */
1814 desc_es_id = get16(pp, desc_end);
1817 if (ts && ts->pids[pid])
1818 ts->pids[pid]->es_id = desc_es_id;
1819 for (i = 0; i < mp4_descr_count; i++)
1820 if (mp4_descr[i].dec_config_descr_len &&
1821 mp4_descr[i].es_id == desc_es_id) {
1823 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1824 mp4_descr[i].dec_config_descr_len, 0,
1825 NULL, NULL, NULL, NULL);
1826 ff_mp4_read_dec_config_descr(fc, st, &pb);
1827 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1828 st->codecpar->extradata_size > 0) {
1829 st->need_parsing = 0;
1830 st->internal->need_context_update = 1;
1832 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1833 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1836 case 0x1F: /* FMC descriptor */
1837 if (get16(pp, desc_end) < 0)
1839 if (mp4_descr_count > 0 &&
1840 (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1841 (st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1842 st->request_probe > 0) &&
1843 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1845 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1846 mp4_descr->dec_config_descr_len, 0,
1847 NULL, NULL, NULL, NULL);
1848 ff_mp4_read_dec_config_descr(fc, st, &pb);
1849 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1850 st->codecpar->extradata_size > 0) {
1851 st->request_probe = st->need_parsing = 0;
1852 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1853 st->internal->need_context_update = 1;
1857 case 0x56: /* DVB teletext descriptor */
1859 uint8_t *extradata = NULL;
1860 int language_count = desc_len / 5, ret;
1862 if (desc_len > 0 && desc_len % 5 != 0)
1863 return AVERROR_INVALIDDATA;
1865 if (language_count > 0) {
1866 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1867 av_assert0(language_count <= sizeof(language) / 4);
1869 if (st->codecpar->extradata == NULL) {
1870 ret = ff_alloc_extradata(st->codecpar, language_count * 2);
1875 if (st->codecpar->extradata_size < language_count * 2)
1876 return AVERROR_INVALIDDATA;
1878 extradata = st->codecpar->extradata;
1880 for (i = 0; i < language_count; i++) {
1881 language[i * 4 + 0] = get8(pp, desc_end);
1882 language[i * 4 + 1] = get8(pp, desc_end);
1883 language[i * 4 + 2] = get8(pp, desc_end);
1884 language[i * 4 + 3] = ',';
1886 memcpy(extradata, *pp, 2);
1892 language[i * 4 - 1] = 0;
1893 av_dict_set(&st->metadata, "language", language, 0);
1894 st->internal->need_context_update = 1;
1898 case 0x59: /* subtitling descriptor */
1900 /* 8 bytes per DVB subtitle substream data:
1901 * ISO_639_language_code (3 bytes),
1902 * subtitling_type (1 byte),
1903 * composition_page_id (2 bytes),
1904 * ancillary_page_id (2 bytes) */
1905 int language_count = desc_len / 8, ret;
1907 if (desc_len > 0 && desc_len % 8 != 0)
1908 return AVERROR_INVALIDDATA;
1910 if (language_count > 1) {
1911 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1914 if (language_count > 0) {
1917 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1918 av_assert0(language_count <= sizeof(language) / 4);
1920 if (st->codecpar->extradata == NULL) {
1921 ret = ff_alloc_extradata(st->codecpar, language_count * 5);
1926 if (st->codecpar->extradata_size < language_count * 5)
1927 return AVERROR_INVALIDDATA;
1929 extradata = st->codecpar->extradata;
1931 for (i = 0; i < language_count; i++) {
1932 language[i * 4 + 0] = get8(pp, desc_end);
1933 language[i * 4 + 1] = get8(pp, desc_end);
1934 language[i * 4 + 2] = get8(pp, desc_end);
1935 language[i * 4 + 3] = ',';
1937 /* hearing impaired subtitles detection using subtitling_type */
1939 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1940 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1941 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1942 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1943 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1944 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1945 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1949 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1950 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1956 language[i * 4 - 1] = 0;
1957 av_dict_set(&st->metadata, "language", language, 0);
1958 st->internal->need_context_update = 1;
1962 case 0x0a: /* ISO 639 language descriptor */
1963 for (i = 0; i + 4 <= desc_len; i += 4) {
1964 language[i + 0] = get8(pp, desc_end);
1965 language[i + 1] = get8(pp, desc_end);
1966 language[i + 2] = get8(pp, desc_end);
1967 language[i + 3] = ',';
1968 switch (get8(pp, desc_end)) {
1970 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1973 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1976 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1977 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
1981 if (i && language[0]) {
1982 language[i - 1] = 0;
1983 /* don't overwrite language, as it may already have been set by
1984 * another, more specific descriptor (e.g. supplementary audio) */
1985 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
1988 case 0x05: /* registration descriptor */
1989 st->codecpar->codec_tag = bytestream_get_le32(pp);
1990 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1991 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) {
1992 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1993 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1994 st->request_probe = 50;
1997 case 0x52: /* stream identifier descriptor */
1998 st->stream_identifier = 1 + get8(pp, desc_end);
2000 case 0x26: /* metadata descriptor */
2001 if (get16(pp, desc_end) == 0xFFFF)
2003 if (get8(pp, desc_end) == 0xFF) {
2004 st->codecpar->codec_tag = bytestream_get_le32(pp);
2005 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2006 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
2009 case 0x7f: /* DVB extension descriptor */
2010 ext_desc_tag = get8(pp, desc_end);
2011 if (ext_desc_tag < 0)
2012 return AVERROR_INVALIDDATA;
2013 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
2014 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2015 if (!st->codecpar->extradata) {
2016 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
2017 AV_INPUT_BUFFER_PADDING_SIZE);
2018 if (!st->codecpar->extradata)
2019 return AVERROR(ENOMEM);
2021 st->codecpar->extradata_size = sizeof(opus_default_extradata);
2022 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
2024 channel_config_code = get8(pp, desc_end);
2025 if (channel_config_code < 0)
2026 return AVERROR_INVALIDDATA;
2027 if (channel_config_code <= 0x8) {
2028 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2029 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2030 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2031 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2032 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2034 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2036 st->need_parsing = AVSTREAM_PARSE_FULL;
2037 st->internal->need_context_update = 1;
2040 if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
2044 return AVERROR_INVALIDDATA;
2045 flags = get8(pp, desc_end);
2047 if ((flags & 0x80) == 0) /* mix_type */
2048 st->disposition |= AV_DISPOSITION_DEPENDENT;
2050 switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2052 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2053 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2056 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2059 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2063 if (flags & 0x01) { /* language_code_present */
2065 return AVERROR_INVALIDDATA;
2066 language[0] = get8(pp, desc_end);
2067 language[1] = get8(pp, desc_end);
2068 language[2] = get8(pp, desc_end);
2071 /* This language always has to override a possible
2072 * ISO 639 language descriptor language */
2074 av_dict_set(&st->metadata, "language", language, 0);
2078 case 0x6a: /* ac-3_descriptor */
2080 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2081 if (component_type_flag) {
2082 int component_type = get8(pp, desc_end);
2083 int service_type_mask = 0x38; // 0b00111000
2084 int service_type = ((component_type & service_type_mask) >> 3);
2085 if (service_type == 0x02 /* 0b010 */) {
2086 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2087 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2092 case 0x7a: /* enhanced_ac-3_descriptor */
2094 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2095 if (component_type_flag) {
2096 int component_type = get8(pp, desc_end);
2097 int service_type_mask = 0x38; // 0b00111000
2098 int service_type = ((component_type & service_type_mask) >> 3);
2099 if (service_type == 0x02 /* 0b010 */) {
2100 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2101 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2106 case 0xfd: /* ARIB data coding type descriptor */
2107 // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2109 if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2110 // This structure is defined in STD-B10, part 1, listing 5.4 and
2112 // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2113 // Component tag limits are documented in TR-B14, fascicle 2,
2114 // Vol. 3, Section 2, 4.2.8.1
2115 int actual_component_tag = st->stream_identifier - 1;
2116 int picked_profile = FF_PROFILE_UNKNOWN;
2117 int data_component_id = get16(pp, desc_end);
2118 if (data_component_id < 0)
2119 return AVERROR_INVALIDDATA;
2121 switch (data_component_id) {
2123 // [0x30..0x37] are component tags utilized for
2124 // non-mobile captioning service ("profile A").
2125 if (actual_component_tag >= 0x30 &&
2126 actual_component_tag <= 0x37) {
2127 picked_profile = FF_PROFILE_ARIB_PROFILE_A;
2131 // component tag 0x87 signifies a mobile/partial reception
2132 // (1seg) captioning service ("profile C").
2133 if (actual_component_tag == 0x87) {
2134 picked_profile = FF_PROFILE_ARIB_PROFILE_C;
2141 if (picked_profile == FF_PROFILE_UNKNOWN)
2144 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2145 st->codecpar->codec_id = AV_CODEC_ID_ARIB_CAPTION;
2146 st->codecpar->profile = picked_profile;
2147 st->request_probe = 0;
2150 case 0xb0: /* DOVI video stream descriptor */
2153 AVDOVIDecoderConfigurationRecord *dovi;
2156 if (desc_end - *pp < 4) // (8 + 8 + 7 + 6 + 1 + 1 + 1) / 8
2157 return AVERROR_INVALIDDATA;
2159 dovi = av_dovi_alloc(&dovi_size);
2161 return AVERROR(ENOMEM);
2163 dovi->dv_version_major = get8(pp, desc_end);
2164 dovi->dv_version_minor = get8(pp, desc_end);
2165 buf = get16(pp, desc_end);
2166 dovi->dv_profile = (buf >> 9) & 0x7f; // 7 bits
2167 dovi->dv_level = (buf >> 3) & 0x3f; // 6 bits
2168 dovi->rpu_present_flag = (buf >> 2) & 0x01; // 1 bit
2169 dovi->el_present_flag = (buf >> 1) & 0x01; // 1 bit
2170 dovi->bl_present_flag = buf & 0x01; // 1 bit
2171 if (desc_end - *pp >= 20) { // 4 + 4 * 4
2172 buf = get8(pp, desc_end);
2173 dovi->dv_bl_signal_compatibility_id = (buf >> 4) & 0x0f; // 4 bits
2175 // 0 stands for None
2176 // Dolby Vision V1.2.93 profiles and levels
2177 dovi->dv_bl_signal_compatibility_id = 0;
2180 ret = av_stream_add_side_data(st, AV_PKT_DATA_DOVI_CONF,
2181 (uint8_t *)dovi, dovi_size);
2187 av_log(fc, AV_LOG_TRACE, "DOVI, version: %d.%d, profile: %d, level: %d, "
2188 "rpu flag: %d, el flag: %d, bl flag: %d, compatibility id: %d\n",
2189 dovi->dv_version_major, dovi->dv_version_minor,
2190 dovi->dv_profile, dovi->dv_level,
2191 dovi->rpu_present_flag,
2192 dovi->el_present_flag,
2193 dovi->bl_present_flag,
2194 dovi->dv_bl_signal_compatibility_id);
2204 static AVStream *find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid,
2205 int stream_identifier, int pmt_stream_idx)
2207 AVFormatContext *s = ts->stream;
2209 AVStream *found = NULL;
2211 for (i = 0; i < s->nb_streams; i++) {
2212 AVStream *st = s->streams[i];
2213 if (st->program_num != programid)
2215 if (stream_identifier != -1) { /* match based on "stream identifier descriptor" if present */
2216 if (st->stream_identifier == stream_identifier+1) {
2220 } else if (st->pmt_stream_idx == pmt_stream_idx) { /* match based on position within the PMT */
2227 av_log(ts->stream, AV_LOG_VERBOSE,
2228 "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2229 av_get_media_type_string(found->codecpar->codec_type),
2236 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2238 const uint8_t **pp = &p;
2239 const uint8_t *desc_list_end;
2240 const uint8_t *desc_end;
2242 int desc_len, desc_tag;
2244 desc_list_len = get16(pp, p_end);
2245 if (desc_list_len < 0)
2247 desc_list_len &= 0xfff;
2248 desc_list_end = p + desc_list_len;
2249 if (desc_list_end > p_end)
2253 desc_tag = get8(pp, desc_list_end);
2256 desc_len = get8(pp, desc_list_end);
2259 desc_end = *pp + desc_len;
2260 if (desc_end > desc_list_end)
2263 if (desc_tag == 0x52) {
2264 return get8(pp, desc_end);
2272 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2274 return !(stream_type == 0x13 ||
2275 (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
2278 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2280 MpegTSContext *ts = filter->u.section_filter.opaque;
2281 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2282 SectionHeader h1, *h = &h1;
2285 const uint8_t *p, *p_end, *desc_list_end;
2286 int program_info_length, pcr_pid, pid, stream_type;
2288 uint32_t prog_reg_desc = 0; /* registration descriptor */
2289 int stream_identifier = -1;
2291 int mp4_descr_count = 0;
2292 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2295 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2296 hex_dump_debug(ts->stream, section, section_len);
2298 p_end = section + section_len - 4;
2300 if (parse_section_header(h, &p, p_end) < 0)
2302 if (h->tid != PMT_TID)
2304 if (skip_identical(h, tssf))
2307 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2308 h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2310 if (!ts->scan_all_pmts && ts->skip_changes)
2313 if (ts->skip_unknown_pmt && !get_program(ts, h->id))
2315 if (!ts->skip_clear)
2316 clear_program(ts, h->id);
2318 pcr_pid = get16(&p, p_end);
2322 add_pid_to_pmt(ts, h->id, pcr_pid);
2323 update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2325 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2327 program_info_length = get16(&p, p_end);
2328 if (program_info_length < 0)
2330 program_info_length &= 0xfff;
2331 while (program_info_length >= 2) {
2333 tag = get8(&p, p_end);
2334 len = get8(&p, p_end);
2336 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2338 if (len > program_info_length - 2)
2339 // something else is broken, exit the program_descriptors_loop
2341 program_info_length -= len + 2;
2342 if (tag == 0x1d) { // IOD descriptor
2343 get8(&p, p_end); // scope
2344 get8(&p, p_end); // label
2346 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2347 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2348 } else if (tag == 0x05 && len >= 4) { // registration descriptor
2349 prog_reg_desc = bytestream_get_le32(&p);
2354 p += program_info_length;
2358 // stop parsing after pmt, we found header
2359 if (!ts->stream->nb_streams)
2362 set_pmt_found(ts, h->id);
2365 for (i = 0; ; i++) {
2368 stream_type = get8(&p, p_end);
2369 if (stream_type < 0)
2371 pid = get16(&p, p_end);
2375 if (pid == ts->current_pid)
2378 if (ts->merge_pmt_versions)
2379 stream_identifier = parse_stream_identifier_desc(p, p_end);
2381 /* now create stream */
2382 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2383 pes = ts->pids[pid]->u.pes_filter.opaque;
2384 if (ts->merge_pmt_versions && !pes->st) {
2385 st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2388 pes->stream_type = stream_type;
2393 pes->st = avformat_new_stream(pes->stream, NULL);
2396 pes->st->id = pes->pid;
2397 pes->st->program_num = h->id;
2398 pes->st->pmt_version = h->version;
2399 pes->st->pmt_stream_idx = i;
2402 } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2404 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2405 pes = add_pes_stream(ts, pid, pcr_pid);
2406 if (ts->merge_pmt_versions && pes && !pes->st) {
2407 st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2410 pes->stream_type = stream_type;
2414 if (pes && !pes->st) {
2415 st = avformat_new_stream(pes->stream, NULL);
2419 st->program_num = h->id;
2420 st->pmt_version = h->version;
2421 st->pmt_stream_idx = i;
2424 int idx = ff_find_stream_index(ts->stream, pid);
2426 st = ts->stream->streams[idx];
2428 if (ts->merge_pmt_versions && !st) {
2429 st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2432 st = avformat_new_stream(ts->stream, NULL);
2436 st->program_num = h->id;
2437 st->pmt_version = h->version;
2438 st->pmt_stream_idx = i;
2439 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2440 if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2441 mpegts_find_stream_type(st, stream_type, SCTE_types);
2442 mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2450 if (pes && !pes->stream_type)
2451 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2453 add_pid_to_pmt(ts, h->id, pid);
2455 av_program_add_stream_index(ts->stream, h->id, st->index);
2457 desc_list_len = get16(&p, p_end);
2458 if (desc_list_len < 0)
2460 desc_list_len &= 0xfff;
2461 desc_list_end = p + desc_list_len;
2462 if (desc_list_end > p_end)
2465 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2466 desc_list_end, mp4_descr,
2467 mp4_descr_count, pid, ts) < 0)
2470 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2471 stream_type == 0x83 && pes->sub_st) {
2472 av_program_add_stream_index(ts->stream, h->id,
2473 pes->sub_st->index);
2474 pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2480 if (!ts->pids[pcr_pid])
2481 mpegts_open_pcr_filter(ts, pcr_pid);
2484 for (i = 0; i < mp4_descr_count; i++)
2485 av_free(mp4_descr[i].dec_config_descr);
2488 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2490 MpegTSContext *ts = filter->u.section_filter.opaque;
2491 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2492 SectionHeader h1, *h = &h1;
2493 const uint8_t *p, *p_end;
2497 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2498 hex_dump_debug(ts->stream, section, section_len);
2500 p_end = section + section_len - 4;
2502 if (parse_section_header(h, &p, p_end) < 0)
2504 if (h->tid != PAT_TID)
2506 if (ts->skip_changes)
2509 if (skip_identical(h, tssf))
2511 ts->stream->ts_id = h->id;
2515 sid = get16(&p, p_end);
2518 pmt_pid = get16(&p, p_end);
2523 if (pmt_pid == ts->current_pid)
2526 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2528 if (sid == 0x0000) {
2531 MpegTSFilter *fil = ts->pids[pmt_pid];
2532 program = av_new_program(ts->stream, sid);
2534 program->program_num = sid;
2535 program->pmt_pid = pmt_pid;
2538 if ( fil->type != MPEGTS_SECTION
2539 || fil->pid != pmt_pid
2540 || fil->u.section_filter.section_cb != pmt_cb)
2541 mpegts_close_filter(ts, ts->pids[pmt_pid]);
2543 if (!ts->pids[pmt_pid])
2544 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2545 add_pat_entry(ts, sid);
2546 add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2547 add_pid_to_pmt(ts, sid, pmt_pid);
2553 for (j=0; j<ts->stream->nb_programs; j++) {
2554 for (i = 0; i < ts->nb_prg; i++)
2555 if (ts->prg[i].id == ts->stream->programs[j]->id)
2557 if (i==ts->nb_prg && !ts->skip_clear)
2558 clear_avprogram(ts, ts->stream->programs[j]->id);
2563 static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2565 MpegTSContext *ts = filter->u.section_filter.opaque;
2566 const uint8_t *p, *p_end;
2567 SectionHeader h1, *h = &h1;
2570 * Sometimes we receive EPG packets but SDT table do not have
2571 * eit_pres_following or eit_sched turned on, so we open EPG
2572 * stream directly here.
2574 if (!ts->epg_stream) {
2575 ts->epg_stream = avformat_new_stream(ts->stream, NULL);
2576 if (!ts->epg_stream)
2578 ts->epg_stream->id = EIT_PID;
2579 ts->epg_stream->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2580 ts->epg_stream->codecpar->codec_id = AV_CODEC_ID_EPG;
2583 if (ts->epg_stream->discard == AVDISCARD_ALL)
2586 p_end = section + section_len - 4;
2589 if (parse_section_header(h, &p, p_end) < 0)
2591 if (h->tid < EIT_TID || h->tid > OEITS_END_TID)
2594 av_log(ts->stream, AV_LOG_TRACE, "EIT: tid received = %.02x\n", h->tid);
2597 * Service_id 0xFFFF is reserved, it indicates that the current EIT table
2600 if (h->id == 0xFFFF) {
2601 av_log(ts->stream, AV_LOG_TRACE, "Scrambled EIT table received.\n");
2606 * In case we receive an EPG packet before mpegts context is fully
2612 new_data_packet(section, section_len, ts->pkt);
2613 ts->pkt->stream_index = ts->epg_stream->index;
2617 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2619 MpegTSContext *ts = filter->u.section_filter.opaque;
2620 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2621 SectionHeader h1, *h = &h1;
2622 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2623 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2624 char *name, *provider_name;
2626 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2627 hex_dump_debug(ts->stream, section, section_len);
2629 p_end = section + section_len - 4;
2631 if (parse_section_header(h, &p, p_end) < 0)
2633 if (h->tid != SDT_TID)
2635 if (ts->skip_changes)
2637 if (skip_identical(h, tssf))
2640 onid = get16(&p, p_end);
2643 val = get8(&p, p_end);
2647 sid = get16(&p, p_end);
2650 val = get8(&p, p_end);
2653 desc_list_len = get16(&p, p_end);
2654 if (desc_list_len < 0)
2656 desc_list_len &= 0xfff;
2657 desc_list_end = p + desc_list_len;
2658 if (desc_list_end > p_end)
2661 desc_tag = get8(&p, desc_list_end);
2664 desc_len = get8(&p, desc_list_end);
2665 desc_end = p + desc_len;
2666 if (desc_len < 0 || desc_end > desc_list_end)
2669 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2670 desc_tag, desc_len);
2674 service_type = get8(&p, p_end);
2675 if (service_type < 0)
2677 provider_name = getstr8(&p, p_end);
2680 name = getstr8(&p, p_end);
2682 AVProgram *program = av_new_program(ts->stream, sid);
2684 av_dict_set(&program->metadata, "service_name", name, 0);
2685 av_dict_set(&program->metadata, "service_provider",
2690 av_free(provider_name);
2701 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2702 const uint8_t *packet);
2704 /* handle one TS packet */
2705 static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
2708 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2709 has_adaptation, has_payload;
2710 const uint8_t *p, *p_end;
2712 pid = AV_RB16(packet + 1) & 0x1fff;
2713 is_start = packet[1] & 0x40;
2714 tss = ts->pids[pid];
2715 if (ts->auto_guess && !tss && is_start) {
2716 add_pes_stream(ts, pid, -1);
2717 tss = ts->pids[pid];
2722 tss->discard = discard_pid(ts, pid);
2725 ts->current_pid = pid;
2727 afc = (packet[3] >> 4) & 3;
2728 if (afc == 0) /* reserved value */
2730 has_adaptation = afc & 2;
2731 has_payload = afc & 1;
2732 is_discontinuity = has_adaptation &&
2733 packet[4] != 0 && /* with length > 0 */
2734 (packet[5] & 0x80); /* and discontinuity indicated */
2736 /* continuity check (currently not used) */
2737 cc = (packet[3] & 0xf);
2738 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2739 cc_ok = pid == 0x1FFF || // null packet PID
2746 av_log(ts->stream, AV_LOG_DEBUG,
2747 "Continuity check failed for pid %d expected %d got %d\n",
2748 pid, expected_cc, cc);
2749 if (tss->type == MPEGTS_PES) {
2750 PESContext *pc = tss->u.pes_filter.opaque;
2751 pc->flags |= AV_PKT_FLAG_CORRUPT;
2755 if (packet[1] & 0x80) {
2756 av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2757 if (tss->type == MPEGTS_PES) {
2758 PESContext *pc = tss->u.pes_filter.opaque;
2759 pc->flags |= AV_PKT_FLAG_CORRUPT;
2764 if (has_adaptation) {
2767 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2768 tss->last_pcr = pcr_h * 300 + pcr_l;
2769 /* skip adaptation field */
2772 /* if past the end of packet, ignore */
2773 p_end = packet + TS_PACKET_SIZE;
2774 if (p >= p_end || !has_payload)
2778 av_assert0(pos >= TS_PACKET_SIZE);
2779 ts->pos47_full = pos - TS_PACKET_SIZE;
2782 if (tss->type == MPEGTS_SECTION) {
2784 /* pointer field present */
2786 if (len > p_end - p)
2789 /* write remaining section bytes */
2790 write_section_data(ts, tss,
2792 /* check whether filter has been closed */
2798 write_section_data(ts, tss,
2803 write_section_data(ts, tss,
2808 // stop find_stream_info from waiting for more streams
2809 // when all programs have received a PMT
2810 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2812 for (i = 0; i < ts->nb_prg; i++) {
2813 if (!ts->prg[i].pmt_found)
2816 if (i == ts->nb_prg && ts->nb_prg > 0) {
2818 for (i = 0; i < ts->stream->nb_streams; i++) {
2819 AVStream *st = ts->stream->streams[i];
2820 if (st->codecpar->codec_type >= 0)
2821 types |= 1<<st->codecpar->codec_type;
2823 if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2824 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2825 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2832 // Note: The position here points actually behind the current packet.
2833 if (tss->type == MPEGTS_PES) {
2834 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2835 pos - ts->raw_packet_size)) < 0)
2843 static void reanalyze(MpegTSContext *ts) {
2844 AVIOContext *pb = ts->stream->pb;
2845 int64_t pos = avio_tell(pb);
2848 pos -= ts->pos47_full;
2849 if (pos == TS_PACKET_SIZE) {
2850 ts->size_stat[0] ++;
2851 } else if (pos == TS_DVHS_PACKET_SIZE) {
2852 ts->size_stat[1] ++;
2853 } else if (pos == TS_FEC_PACKET_SIZE) {
2854 ts->size_stat[2] ++;
2857 ts->size_stat_count ++;
2858 if (ts->size_stat_count > SIZE_STAT_THRESHOLD) {
2860 if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2861 newsize = TS_PACKET_SIZE;
2862 } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2863 newsize = TS_DVHS_PACKET_SIZE;
2864 } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2865 newsize = TS_FEC_PACKET_SIZE;
2867 if (newsize && newsize != ts->raw_packet_size) {
2868 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2869 ts->raw_packet_size = newsize;
2871 ts->size_stat_count = 0;
2872 memset(ts->size_stat, 0, sizeof(ts->size_stat));
2876 /* XXX: try to find a better synchro over several packets (use
2877 * get_packet_size() ?) */
2878 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2880 MpegTSContext *ts = s->priv_data;
2881 AVIOContext *pb = s->pb;
2883 uint64_t pos = avio_tell(pb);
2885 avio_seek(pb, -FFMIN(seekback, pos), SEEK_CUR);
2887 //Special case for files like 01c56b0dc1.ts
2888 if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2889 avio_seek(pb, 12, SEEK_CUR);
2893 for (i = 0; i < ts->resync_size; i++) {
2898 avio_seek(pb, -1, SEEK_CUR);
2899 reanalyze(s->priv_data);
2903 av_log(s, AV_LOG_ERROR,
2904 "max resync size reached, could not find sync byte\n");
2906 return AVERROR_INVALIDDATA;
2909 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2910 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2911 const uint8_t **data)
2913 AVIOContext *pb = s->pb;
2917 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2918 if (len != TS_PACKET_SIZE)
2919 return len < 0 ? len : AVERROR_EOF;
2920 /* check packet sync byte */
2921 if ((*data)[0] != 0x47) {
2922 /* find a new packet start */
2924 if (mpegts_resync(s, raw_packet_size, *data) < 0)
2925 return AVERROR(EAGAIN);
2935 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2937 AVIOContext *pb = s->pb;
2938 int skip = raw_packet_size - TS_PACKET_SIZE;
2940 avio_skip(pb, skip);
2943 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2945 AVFormatContext *s = ts->stream;
2946 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2947 const uint8_t *data;
2951 if (avio_tell(s->pb) != ts->last_pos) {
2953 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2954 /* seek detected, flush pes buffer */
2955 for (i = 0; i < NB_PID_MAX; i++) {
2957 if (ts->pids[i]->type == MPEGTS_PES) {
2958 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2959 av_buffer_unref(&pes->buffer);
2960 pes->data_index = 0;
2961 pes->state = MPEGTS_SKIP; /* skip until pes header */
2962 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2963 ts->pids[i]->u.section_filter.last_ver = -1;
2965 ts->pids[i]->last_cc = -1;
2966 ts->pids[i]->last_pcr = -1;
2973 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2976 if (nb_packets != 0 && packet_num >= nb_packets ||
2977 ts->stop_parse > 1) {
2978 ret = AVERROR(EAGAIN);
2981 if (ts->stop_parse > 0)
2984 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2987 ret = handle_packet(ts, data, avio_tell(s->pb));
2988 finished_reading_packet(s, ts->raw_packet_size);
2992 ts->last_pos = avio_tell(s->pb);
2996 static int mpegts_probe(const AVProbeData *p)
2998 const int size = p->buf_size;
3002 int check_count = size / TS_FEC_PACKET_SIZE;
3003 #define CHECK_COUNT 10
3004 #define CHECK_BLOCK 100
3009 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
3010 int left = FFMIN(check_count - i, CHECK_BLOCK);
3011 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
3012 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
3013 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
3014 score = FFMAX3(score, dvhs_score, fec_score);
3016 maxscore = FFMAX(maxscore, score);
3019 sumscore = sumscore * CHECK_COUNT / check_count;
3020 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
3022 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
3024 if (check_count > CHECK_COUNT && sumscore > 6) {
3025 return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
3026 } else if (check_count >= CHECK_COUNT && sumscore > 6) {
3027 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3028 } else if (check_count >= CHECK_COUNT && maxscore > 6) {
3029 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3030 } else if (sumscore > 6) {
3037 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
3038 * (-1) if not available */
3039 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
3041 int afc, len, flags;
3045 afc = (packet[3] >> 4) & 3;
3047 return AVERROR_INVALIDDATA;
3052 return AVERROR_INVALIDDATA;
3055 if (!(flags & 0x10))
3056 return AVERROR_INVALIDDATA;
3058 return AVERROR_INVALIDDATA;
3060 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
3061 *ppcr_low = ((p[4] & 1) << 8) | p[5];
3065 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
3067 /* NOTE: We attempt to seek on non-seekable files as well, as the
3068 * probe buffer usually is big enough. Only warn if the seek failed
3069 * on files where the seek should work. */
3070 if (avio_seek(pb, pos, SEEK_SET) < 0)
3071 av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
3074 static int mpegts_read_header(AVFormatContext *s)
3076 MpegTSContext *ts = s->priv_data;
3077 AVIOContext *pb = s->pb;
3078 int64_t pos, probesize = s->probesize;
3080 s->internal->prefer_codec_framerate = 1;
3082 if (ffio_ensure_seekback(pb, probesize) < 0)
3083 av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
3085 pos = avio_tell(pb);
3086 ts->raw_packet_size = get_packet_size(s);
3087 if (ts->raw_packet_size <= 0) {
3088 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
3089 ts->raw_packet_size = TS_PACKET_SIZE;
3094 if (s->iformat == &ff_mpegts_demuxer) {
3097 /* first do a scan to get all the services */
3098 seek_back(s, pb, pos);
3100 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3101 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3102 mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
3104 handle_packets(ts, probesize / ts->raw_packet_size);
3105 /* if could not find service, enable auto_guess */
3109 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
3111 s->ctx_flags |= AVFMTCTX_NOHEADER;
3114 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
3115 int64_t pcrs[2], pcr_h;
3116 int packet_count[2];
3117 uint8_t packet[TS_PACKET_SIZE];
3118 const uint8_t *data;
3120 /* only read packets */
3122 st = avformat_new_stream(s, NULL);
3124 return AVERROR(ENOMEM);
3125 avpriv_set_pts_info(st, 60, 1, 27000000);
3126 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
3127 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
3129 /* we iterate until we find two PCRs to estimate the bitrate */
3134 ret = read_packet(s, packet, ts->raw_packet_size, &data);
3137 pid = AV_RB16(data + 1) & 0x1fff;
3138 if ((pcr_pid == -1 || pcr_pid == pid) &&
3139 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
3140 finished_reading_packet(s, ts->raw_packet_size);
3142 packet_count[nb_pcrs] = nb_packets;
3143 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
3146 if (pcrs[1] - pcrs[0] > 0) {
3147 /* the difference needs to be positive to make sense for bitrate computation */
3150 av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
3152 packet_count[0] = packet_count[1];
3157 finished_reading_packet(s, ts->raw_packet_size);
3162 /* NOTE1: the bitrate is computed without the FEC */
3163 /* NOTE2: it is only the bitrate of the start of the stream */
3164 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
3165 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
3166 s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
3167 st->codecpar->bit_rate = s->bit_rate;
3168 st->start_time = ts->cur_pcr;
3169 av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
3170 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
3173 seek_back(s, pb, pos);
3177 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
3179 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
3181 MpegTSContext *ts = s->priv_data;
3183 int64_t pcr_h, next_pcr_h, pos;
3184 int pcr_l, next_pcr_l;
3185 uint8_t pcr_buf[12];
3186 const uint8_t *data;
3188 if ((ret = av_new_packet(pkt, TS_PACKET_SIZE)) < 0)
3190 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
3191 pkt->pos = avio_tell(s->pb);
3195 if (data != pkt->data)
3196 memcpy(pkt->data, data, ts->raw_packet_size);
3197 finished_reading_packet(s, ts->raw_packet_size);
3198 if (ts->mpeg2ts_compute_pcr) {
3199 /* compute exact PCR for each packet */
3200 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
3201 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
3202 pos = avio_tell(s->pb);
3203 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
3204 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
3205 avio_read(s->pb, pcr_buf, 12);
3206 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
3207 /* XXX: not precise enough */
3209 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
3214 avio_seek(s->pb, pos, SEEK_SET);
3215 /* no next PCR found: we use previous increment */
3216 ts->cur_pcr = pcr_h * 300 + pcr_l;
3218 pkt->pts = ts->cur_pcr;
3219 pkt->duration = ts->pcr_incr;
3220 ts->cur_pcr += ts->pcr_incr;
3222 pkt->stream_index = 0;
3226 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
3228 MpegTSContext *ts = s->priv_data;
3233 ret = handle_packets(ts, 0);
3235 av_packet_unref(ts->pkt);
3236 /* flush pes data left */
3237 for (i = 0; i < NB_PID_MAX; i++)
3238 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
3239 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3240 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
3241 ret = new_pes_packet(pes, pkt);
3244 pes->state = MPEGTS_SKIP;
3251 if (!ret && pkt->size < 0)
3252 ret = AVERROR_INVALIDDATA;
3256 static void mpegts_free(MpegTSContext *ts)
3262 for (i = 0; i < FF_ARRAY_ELEMS(ts->pools); i++)
3263 av_buffer_pool_uninit(&ts->pools[i]);
3265 for (i = 0; i < NB_PID_MAX; i++)
3267 mpegts_close_filter(ts, ts->pids[i]);
3270 static int mpegts_read_close(AVFormatContext *s)
3272 MpegTSContext *ts = s->priv_data;
3277 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3278 int64_t *ppos, int64_t pos_limit)
3280 MpegTSContext *ts = s->priv_data;
3281 int64_t pos, timestamp;
3282 uint8_t buf[TS_PACKET_SIZE];
3283 int pcr_l, pcr_pid =
3284 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3285 int pos47 = ts->pos47_full % ts->raw_packet_size;
3287 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3288 ts->raw_packet_size + pos47;
3289 while(pos < pos_limit) {
3290 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3291 return AV_NOPTS_VALUE;
3292 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3293 return AV_NOPTS_VALUE;
3294 if (buf[0] != 0x47) {
3295 if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3296 return AV_NOPTS_VALUE;
3297 pos = avio_tell(s->pb);
3300 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3301 parse_pcr(×tamp, &pcr_l, buf) == 0) {
3305 pos += ts->raw_packet_size;
3308 return AV_NOPTS_VALUE;
3311 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3312 int64_t *ppos, int64_t pos_limit)
3314 MpegTSContext *ts = s->priv_data;
3316 int pos47 = ts->pos47_full % ts->raw_packet_size;
3317 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3318 ff_read_frame_flush(s);
3319 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3320 return AV_NOPTS_VALUE;
3321 while(pos < pos_limit) {
3324 av_init_packet(&pkt);
3325 ret = av_read_frame(s, &pkt);
3327 return AV_NOPTS_VALUE;
3328 if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
3329 ff_reduce_index(s, pkt.stream_index);
3330 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3331 if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
3332 int64_t dts = pkt.dts;
3334 av_packet_unref(&pkt);
3339 av_packet_unref(&pkt);
3342 return AV_NOPTS_VALUE;
3345 /**************************************************************/
3346 /* parsing functions - called from other demuxers such as RTP */
3348 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
3352 ts = av_mallocz(sizeof(MpegTSContext));
3355 /* no stream case, currently used by RTP */
3356 ts->raw_packet_size = TS_PACKET_SIZE;
3360 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3361 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3362 mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
3367 /* return the consumed length if a packet was output, or -1 if no
3368 * packet is output */
3369 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
3370 const uint8_t *buf, int len)
3378 if (len < TS_PACKET_SIZE)
3379 return AVERROR_INVALIDDATA;
3380 if (buf[0] != 0x47) {
3384 handle_packet(ts, buf, len1 - len + TS_PACKET_SIZE);
3385 buf += TS_PACKET_SIZE;
3386 len -= TS_PACKET_SIZE;
3387 if (ts->stop_parse == 1)
3394 void avpriv_mpegts_parse_close(MpegTSContext *ts)
3400 AVInputFormat ff_mpegts_demuxer = {
3402 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3403 .priv_data_size = sizeof(MpegTSContext),
3404 .read_probe = mpegts_probe,
3405 .read_header = mpegts_read_header,
3406 .read_packet = mpegts_read_packet,
3407 .read_close = mpegts_read_close,
3408 .read_timestamp = mpegts_get_dts,
3409 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3410 .priv_class = &mpegts_class,
3413 AVInputFormat ff_mpegtsraw_demuxer = {
3414 .name = "mpegtsraw",
3415 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3416 .priv_data_size = sizeof(MpegTSContext),
3417 .read_header = mpegts_read_header,
3418 .read_packet = mpegts_raw_read_packet,
3419 .read_close = mpegts_read_close,
3420 .read_timestamp = mpegts_get_dts,
3421 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3422 .priv_class = &mpegtsraw_class,