2 * MPEG-2 transport stream (aka DVB) demuxer
3 * Copyright (c) 2002-2003 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/buffer.h"
23 #include "libavutil/crc.h"
24 #include "libavutil/internal.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/log.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/mathematics.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/avassert.h"
31 #include "libavcodec/bytestream.h"
32 #include "libavcodec/get_bits.h"
33 #include "libavcodec/opus.h"
37 #include "avio_internal.h"
44 /* maximum size in which we look for synchronization if
45 * synchronization is lost */
46 #define MAX_RESYNC_SIZE 65536
48 #define MAX_PES_PAYLOAD 200 * 1024
50 #define MAX_MP4_DESCR_COUNT 16
52 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
54 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
55 (modulus) = (dividend) % (divisor); \
56 (prev_dividend) = (dividend); \
59 #define PROBE_PACKET_MAX_BUF 8192
60 #define PROBE_PACKET_MARGIN 5
62 enum MpegTSFilterType {
68 typedef struct MpegTSFilter MpegTSFilter;
70 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
71 int is_start, int64_t pos);
73 typedef struct MpegTSPESFilter {
78 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
80 typedef void SetServiceCallback (void *opaque, int ret);
82 typedef struct MpegTSSectionFilter {
89 unsigned int check_crc : 1;
90 unsigned int end_of_section_reached : 1;
91 SectionCallback *section_cb;
93 } MpegTSSectionFilter;
98 int last_cc; /* last cc code (-1 if first packet) */
101 enum MpegTSFilterType type;
103 MpegTSPESFilter pes_filter;
104 MpegTSSectionFilter section_filter;
108 #define MAX_PIDS_PER_PROGRAM 64
110 unsigned int id; // program id/service id
111 unsigned int nb_pids;
112 unsigned int pids[MAX_PIDS_PER_PROGRAM];
114 /** have we found pmt for this program */
118 struct MpegTSContext {
119 const AVClass *class;
121 AVFormatContext *stream;
122 /** raw packet size, including FEC if present */
127 #define SIZE_STAT_THRESHOLD 10
131 /** if true, all pids are analyzed to find streams */
134 /** compute exact PCR for each transport stream packet */
135 int mpeg2ts_compute_pcr;
137 /** fix dvb teletext pts */
138 int fix_teletext_pts;
140 int64_t cur_pcr; /**< used to estimate the exact PCR */
141 int pcr_incr; /**< used to estimate the exact PCR */
143 /* data needed to handle file based ts */
144 /** stop parsing loop */
146 /** packet containing Audio/Video data */
148 /** to detect seek */
153 int skip_unknown_pmt;
158 int merge_pmt_versions;
160 /******************************************/
161 /* private mpegts data */
163 /** structure to keep track of Program->pids mapping */
167 int8_t crc_validity[NB_PID_MAX];
168 /** filters for various streams specified by PMT + for the PAT and PMT */
169 MpegTSFilter *pids[NB_PID_MAX];
173 #define MPEGTS_OPTIONS \
174 { "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 }
176 static const AVOption options[] = {
178 {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
179 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
180 {"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
181 {.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
182 {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
183 {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
184 {"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
185 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
186 {"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
187 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
188 {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
189 {.i64 = 0}, 0, 1, 0 },
190 {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
191 {.i64 = 0}, 0, 1, 0 },
195 static const AVClass mpegts_class = {
196 .class_name = "mpegts demuxer",
197 .item_name = av_default_item_name,
199 .version = LIBAVUTIL_VERSION_INT,
202 static const AVOption raw_options[] = {
204 { "compute_pcr", "compute exact PCR for each transport stream packet",
205 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
206 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
207 { "ts_packetsize", "output option carrying the raw packet size",
208 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
210 AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
214 static const AVClass mpegtsraw_class = {
215 .class_name = "mpegtsraw demuxer",
216 .item_name = av_default_item_name,
217 .option = raw_options,
218 .version = LIBAVUTIL_VERSION_INT,
221 /* TS stream handling */
226 MPEGTS_PESHEADER_FILL,
231 /* enough for PES header + length */
232 #define PES_START_SIZE 6
233 #define PES_HEADER_SIZE 9
234 #define MAX_PES_HEADER_SIZE (9 + 255)
236 typedef struct PESContext {
238 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
241 AVFormatContext *stream;
243 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
244 enum MpegTSState state;
245 /* used to get the format */
247 int flags; /**< copied to the AVPacket flags */
250 int extended_stream_id;
253 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
254 uint8_t header[MAX_PES_HEADER_SIZE];
260 extern AVInputFormat ff_mpegts_demuxer;
262 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
265 for (i = 0; i < ts->nb_prg; i++) {
266 if (ts->prg[i].id == programid) {
273 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
275 AVProgram *prg = NULL;
278 for (i = 0; i < ts->stream->nb_programs; i++)
279 if (ts->stream->programs[i]->id == programid) {
280 prg = ts->stream->programs[i];
285 prg->nb_stream_indexes = 0;
288 static void clear_program(MpegTSContext *ts, unsigned int programid)
292 clear_avprogram(ts, programid);
293 for (i = 0; i < ts->nb_prg; i++)
294 if (ts->prg[i].id == programid) {
295 ts->prg[i].nb_pids = 0;
296 ts->prg[i].pmt_found = 0;
300 static void clear_programs(MpegTSContext *ts)
306 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
309 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
313 p = &ts->prg[ts->nb_prg];
320 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
323 struct Program *p = get_program(ts, programid);
328 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
331 for (i = 0; i < p->nb_pids; i++)
332 if (p->pids[i] == pid)
335 p->pids[p->nb_pids++] = pid;
338 static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
340 struct Program *p = get_program(ts, programid);
347 static void update_av_program_info(AVFormatContext *s, unsigned int programid,
348 unsigned int pid, int version)
351 for (i = 0; i < s->nb_programs; i++) {
352 AVProgram *program = s->programs[i];
353 if (program->id == programid) {
354 int old_pcr_pid = program->pcr_pid,
355 old_version = program->pmt_version;
356 program->pcr_pid = pid;
357 program->pmt_version = version;
359 if (old_version != -1 && old_version != version) {
360 av_log(s, AV_LOG_VERBOSE,
361 "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
362 programid, old_version, version, old_pcr_pid, pid);
370 * @brief discard_pid() decides if the pid is to be discarded according
371 * to caller's programs selection
372 * @param ts : - TS context
374 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
377 static int discard_pid(MpegTSContext *ts, unsigned int pid)
380 int used = 0, discarded = 0;
383 /* If none of the programs have .discard=AVDISCARD_ALL then there's
384 * no way we have to discard this packet */
385 for (k = 0; k < ts->stream->nb_programs; k++)
386 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
388 if (k == ts->stream->nb_programs)
391 for (i = 0; i < ts->nb_prg; i++) {
393 for (j = 0; j < p->nb_pids; j++) {
394 if (p->pids[j] != pid)
396 // is program with id p->id set to be discarded?
397 for (k = 0; k < ts->stream->nb_programs; k++) {
398 if (ts->stream->programs[k]->id == p->id) {
399 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
408 return !used && discarded;
412 * Assemble PES packets out of TS packets, and then call the "section_cb"
413 * function when they are complete.
415 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
416 const uint8_t *buf, int buf_size, int is_start)
418 MpegTSSectionFilter *tss = &tss1->u.section_filter;
419 uint8_t *cur_section_buf = NULL;
423 memcpy(tss->section_buf, buf, buf_size);
424 tss->section_index = buf_size;
425 tss->section_h_size = -1;
426 tss->end_of_section_reached = 0;
428 if (tss->end_of_section_reached)
430 len = MAX_SECTION_SIZE - tss->section_index;
433 memcpy(tss->section_buf + tss->section_index, buf, len);
434 tss->section_index += len;
438 cur_section_buf = tss->section_buf;
439 while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
440 /* compute section length if possible */
441 if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
442 len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
443 if (len > MAX_SECTION_SIZE)
445 tss->section_h_size = len;
448 if (tss->section_h_size != -1 &&
449 tss->section_index >= offset + tss->section_h_size) {
451 tss->end_of_section_reached = 1;
453 if (tss->check_crc) {
454 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
455 if (tss->section_h_size >= 4)
456 tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
459 ts->crc_validity[ tss1->pid ] = 100;
460 }else if (ts->crc_validity[ tss1->pid ] > -10) {
461 ts->crc_validity[ tss1->pid ]--;
466 tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
471 cur_section_buf += tss->section_h_size;
472 offset += tss->section_h_size;
473 tss->section_h_size = -1;
475 tss->section_h_size = -1;
476 tss->end_of_section_reached = 0;
482 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
483 enum MpegTSFilterType type)
485 MpegTSFilter *filter;
487 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
489 if (pid >= NB_PID_MAX || ts->pids[pid])
491 filter = av_mallocz(sizeof(MpegTSFilter));
494 ts->pids[pid] = filter;
499 filter->last_cc = -1;
500 filter->last_pcr= -1;
505 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
507 SectionCallback *section_cb,
511 MpegTSFilter *filter;
512 MpegTSSectionFilter *sec;
514 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
516 sec = &filter->u.section_filter;
517 sec->section_cb = section_cb;
518 sec->opaque = opaque;
519 sec->section_buf = av_mallocz(MAX_SECTION_SIZE);
520 sec->check_crc = check_crc;
523 if (!sec->section_buf) {
530 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
534 MpegTSFilter *filter;
535 MpegTSPESFilter *pes;
537 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
540 pes = &filter->u.pes_filter;
541 pes->pes_cb = pes_cb;
542 pes->opaque = opaque;
546 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
548 return mpegts_open_filter(ts, pid, MPEGTS_PCR);
551 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
556 if (filter->type == MPEGTS_SECTION)
557 av_freep(&filter->u.section_filter.section_buf);
558 else if (filter->type == MPEGTS_PES) {
559 PESContext *pes = filter->u.pes_filter.opaque;
560 av_buffer_unref(&pes->buffer);
561 /* referenced private data will be freed later in
562 * avformat_close_input (pes->st->priv_data == pes) */
563 if (!pes->st || pes->merged_st) {
564 av_freep(&filter->u.pes_filter.opaque);
569 ts->pids[pid] = NULL;
572 static int analyze(const uint8_t *buf, int size, int packet_size,
575 int stat[TS_MAX_PACKET_SIZE];
580 memset(stat, 0, packet_size * sizeof(*stat));
582 for (i = 0; i < size - 3; i++) {
583 if (buf[i] == 0x47) {
584 int pid = AV_RB16(buf+1) & 0x1FFF;
585 int asc = buf[i + 3] & 0x30;
586 if (!probe || pid == 0x1FFF || asc) {
587 int x = i % packet_size;
590 if (stat[x] > best_score) {
591 best_score = stat[x];
597 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
600 /* autodetect fec presence */
601 static int get_packet_size(AVFormatContext* s)
603 int score, fec_score, dvhs_score;
607 /*init buffer to store stream for probing */
608 uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
611 while (buf_size < PROBE_PACKET_MAX_BUF) {
612 ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
614 return AVERROR_INVALIDDATA;
617 score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
618 dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
619 fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
620 av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
621 buf_size, score, dvhs_score, fec_score);
623 margin = mid_pred(score, fec_score, dvhs_score);
625 if (buf_size < PROBE_PACKET_MAX_BUF)
626 margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
629 return TS_PACKET_SIZE;
630 else if (dvhs_score > margin)
631 return TS_DVHS_PACKET_SIZE;
632 else if (fec_score > margin)
633 return TS_FEC_PACKET_SIZE;
635 return AVERROR_INVALIDDATA;
638 typedef struct SectionHeader {
643 uint8_t last_sec_num;
646 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
648 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
651 tssf->last_ver = h->version;
652 tssf->last_crc = tssf->crc;
657 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
664 return AVERROR_INVALIDDATA;
670 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
677 return AVERROR_INVALIDDATA;
684 /* read and allocate a DVB string preceded by its length */
685 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
692 len = get8(&p, p_end);
699 const char *encodings[] = {
700 "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
701 "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
702 "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
703 "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
704 "", "", "", "", "", "", "", ""
708 size_t inlen = len, outlen = inlen * 6 + 1;
709 if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
711 snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
714 cd = iconv_open("UTF-8", iso8859);
715 } else if (p[0] < 0x20) {
718 cd = iconv_open("UTF-8", encodings[*p]);
721 cd = iconv_open("UTF-8", encodings[0]);
723 if (cd == (iconv_t)-1)
725 str = out = av_malloc(outlen);
730 if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
742 str = av_malloc(len + 1);
752 static int parse_section_header(SectionHeader *h,
753 const uint8_t **pp, const uint8_t *p_end)
757 val = get8(pp, p_end);
762 val = get16(pp, p_end);
766 val = get8(pp, p_end);
769 h->version = (val >> 1) & 0x1f;
770 val = get8(pp, p_end);
774 val = get8(pp, p_end);
777 h->last_sec_num = val;
781 typedef struct StreamType {
782 uint32_t stream_type;
783 enum AVMediaType codec_type;
784 enum AVCodecID codec_id;
787 static const StreamType ISO_types[] = {
788 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
789 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
790 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
791 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
792 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
793 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
794 /* Makito encoder sets stream type 0x11 for AAC,
795 * so auto-detect LOAS/LATM instead of hardcoding it. */
796 #if !CONFIG_LOAS_DEMUXER
797 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
799 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
800 { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
801 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
802 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
803 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
804 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
805 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
806 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
810 static const StreamType HDMV_types[] = {
811 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
812 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
813 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
814 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
815 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
816 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
817 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
818 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
819 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
820 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
821 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
826 static const StreamType SCTE_types[] = {
827 { 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
832 static const StreamType MISC_types[] = {
833 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
834 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
838 static const StreamType REGD_types[] = {
839 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
840 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
841 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
842 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
843 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
844 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
845 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
846 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
847 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
848 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
849 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
850 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
854 static const StreamType METADATA_types[] = {
855 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
856 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
860 /* descriptor present */
861 static const StreamType DESC_types[] = {
862 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
863 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
864 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
865 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
866 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
870 static void mpegts_find_stream_type(AVStream *st,
871 uint32_t stream_type,
872 const StreamType *types)
874 for (; types->stream_type; types++)
875 if (stream_type == types->stream_type) {
876 if (st->codecpar->codec_type != types->codec_type ||
877 st->codecpar->codec_id != types->codec_id) {
878 st->codecpar->codec_type = types->codec_type;
879 st->codecpar->codec_id = types->codec_id;
880 st->internal->need_context_update = 1;
882 st->request_probe = 0;
887 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
888 uint32_t stream_type, uint32_t prog_reg_desc)
890 int old_codec_type = st->codecpar->codec_type;
891 int old_codec_id = st->codecpar->codec_id;
892 int old_codec_tag = st->codecpar->codec_tag;
894 if (avcodec_is_open(st->internal->avctx)) {
895 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
899 avpriv_set_pts_info(st, 33, 1, 90000);
901 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
902 st->codecpar->codec_id = AV_CODEC_ID_NONE;
903 st->need_parsing = AVSTREAM_PARSE_FULL;
905 pes->stream_type = stream_type;
907 av_log(pes->stream, AV_LOG_DEBUG,
908 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
909 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
911 st->codecpar->codec_tag = pes->stream_type;
913 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
914 if (pes->stream_type == 4 || pes->stream_type == 0x0f)
915 st->request_probe = 50;
916 if ((prog_reg_desc == AV_RL32("HDMV") ||
917 prog_reg_desc == AV_RL32("HDPR")) &&
918 st->codecpar->codec_id == AV_CODEC_ID_NONE) {
919 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
920 if (pes->stream_type == 0x83) {
921 // HDMV TrueHD streams also contain an AC3 coded version of the
922 // audio track - add a second stream for this
924 // priv_data cannot be shared between streams
925 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
927 return AVERROR(ENOMEM);
928 memcpy(sub_pes, pes, sizeof(*sub_pes));
930 sub_st = avformat_new_stream(pes->stream, NULL);
933 return AVERROR(ENOMEM);
936 sub_st->id = pes->pid;
937 avpriv_set_pts_info(sub_st, 33, 1, 90000);
938 sub_st->priv_data = sub_pes;
939 sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
940 sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
941 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
942 sub_pes->sub_st = pes->sub_st = sub_st;
945 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
946 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
947 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
948 st->codecpar->codec_id = old_codec_id;
949 st->codecpar->codec_type = old_codec_type;
951 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
952 (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
953 st->probe_packets > 0 &&
954 stream_type == STREAM_TYPE_PRIVATE_DATA) {
955 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
956 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
957 st->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
960 /* queue a context update if properties changed */
961 if (old_codec_type != st->codecpar->codec_type ||
962 old_codec_id != st->codecpar->codec_id ||
963 old_codec_tag != st->codecpar->codec_tag)
964 st->internal->need_context_update = 1;
969 static void reset_pes_packet_state(PESContext *pes)
971 pes->pts = AV_NOPTS_VALUE;
972 pes->dts = AV_NOPTS_VALUE;
975 av_buffer_unref(&pes->buffer);
978 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
981 pkt->data = (uint8_t *)buffer;
985 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
991 pkt->buf = pes->buffer;
992 pkt->data = pes->buffer->data;
993 pkt->size = pes->data_index;
995 if (pes->total_size != MAX_PES_PAYLOAD &&
996 pes->pes_header_size + pes->data_index != pes->total_size +
998 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
999 pes->flags |= AV_PKT_FLAG_CORRUPT;
1001 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1003 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
1004 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
1005 pkt->stream_index = pes->sub_st->index;
1007 pkt->stream_index = pes->st->index;
1008 pkt->pts = pes->pts;
1009 pkt->dts = pes->dts;
1010 /* store position of first TS packet of this PES packet */
1011 pkt->pos = pes->ts_packet_pos;
1012 pkt->flags = pes->flags;
1015 reset_pes_packet_state(pes);
1017 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
1019 return AVERROR(ENOMEM);
1020 *sd = pes->stream_id;
1025 static uint64_t get_ts64(GetBitContext *gb, int bits)
1027 if (get_bits_left(gb) < bits)
1028 return AV_NOPTS_VALUE;
1029 return get_bits64(gb, bits);
1032 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
1033 const uint8_t *buf, int buf_size)
1036 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1037 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1038 int dts_flag = -1, cts_flag = -1;
1039 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1040 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1041 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1043 memcpy(buf_padded, buf, buf_padded_size);
1045 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1047 if (sl->use_au_start)
1048 au_start_flag = get_bits1(&gb);
1050 au_end_flag = get_bits1(&gb);
1051 if (!sl->use_au_start && !sl->use_au_end)
1052 au_start_flag = au_end_flag = 1;
1053 if (sl->ocr_len > 0)
1054 ocr_flag = get_bits1(&gb);
1056 idle_flag = get_bits1(&gb);
1057 if (sl->use_padding)
1058 padding_flag = get_bits1(&gb);
1060 padding_bits = get_bits(&gb, 3);
1062 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1063 if (sl->packet_seq_num_len)
1064 skip_bits_long(&gb, sl->packet_seq_num_len);
1065 if (sl->degr_prior_len)
1067 skip_bits(&gb, sl->degr_prior_len);
1069 skip_bits_long(&gb, sl->ocr_len);
1070 if (au_start_flag) {
1071 if (sl->use_rand_acc_pt)
1073 if (sl->au_seq_num_len > 0)
1074 skip_bits_long(&gb, sl->au_seq_num_len);
1075 if (sl->use_timestamps) {
1076 dts_flag = get_bits1(&gb);
1077 cts_flag = get_bits1(&gb);
1080 if (sl->inst_bitrate_len)
1081 inst_bitrate_flag = get_bits1(&gb);
1083 dts = get_ts64(&gb, sl->timestamp_len);
1085 cts = get_ts64(&gb, sl->timestamp_len);
1087 skip_bits_long(&gb, sl->au_len);
1088 if (inst_bitrate_flag)
1089 skip_bits_long(&gb, sl->inst_bitrate_len);
1092 if (dts != AV_NOPTS_VALUE)
1094 if (cts != AV_NOPTS_VALUE)
1097 if (sl->timestamp_len && sl->timestamp_res)
1098 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1100 return (get_bits_count(&gb) + 7) >> 3;
1103 /* return non zero if a packet could be constructed */
1104 static int mpegts_push_data(MpegTSFilter *filter,
1105 const uint8_t *buf, int buf_size, int is_start,
1108 PESContext *pes = filter->u.pes_filter.opaque;
1109 MpegTSContext *ts = pes->ts;
1117 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1118 ret = new_pes_packet(pes, ts->pkt);
1123 reset_pes_packet_state(pes);
1125 pes->state = MPEGTS_HEADER;
1126 pes->ts_packet_pos = pos;
1129 while (buf_size > 0) {
1130 switch (pes->state) {
1132 len = PES_START_SIZE - pes->data_index;
1135 memcpy(pes->header + pes->data_index, p, len);
1136 pes->data_index += len;
1139 if (pes->data_index == PES_START_SIZE) {
1140 /* we got all the PES or section header. We can now
1142 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1143 pes->header[2] == 0x01) {
1144 /* it must be an MPEG-2 PES stream */
1145 code = pes->header[3] | 0x100;
1146 av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1148 pes->stream_id = pes->header[3];
1150 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1152 pes->sub_st->discard == AVDISCARD_ALL)) ||
1153 code == 0x1be) /* padding_stream */
1156 /* stream not present in PMT */
1158 if (ts->skip_changes)
1160 if (ts->merge_pmt_versions)
1161 goto skip; /* wait for PMT to merge new stream */
1163 pes->st = avformat_new_stream(ts->stream, NULL);
1165 return AVERROR(ENOMEM);
1166 pes->st->id = pes->pid;
1167 mpegts_set_stream_info(pes->st, pes, 0, 0);
1170 pes->total_size = AV_RB16(pes->header + 4);
1171 /* NOTE: a zero total size means the PES size is
1173 if (!pes->total_size)
1174 pes->total_size = MAX_PES_PAYLOAD;
1176 /* allocate pes buffer */
1177 pes->buffer = av_buffer_alloc(pes->total_size +
1178 AV_INPUT_BUFFER_PADDING_SIZE);
1180 return AVERROR(ENOMEM);
1182 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1183 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1184 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1185 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1186 pes->state = MPEGTS_PESHEADER;
1187 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1188 av_log(pes->stream, AV_LOG_TRACE,
1189 "pid=%x stream_type=%x probing\n",
1192 pes->st->request_probe = 1;
1195 pes->pes_header_size = 6;
1196 pes->state = MPEGTS_PAYLOAD;
1197 pes->data_index = 0;
1200 /* otherwise, it should be a table */
1203 pes->state = MPEGTS_SKIP;
1208 /**********************************************/
1209 /* PES packing parsing */
1210 case MPEGTS_PESHEADER:
1211 len = PES_HEADER_SIZE - pes->data_index;
1213 return AVERROR_INVALIDDATA;
1216 memcpy(pes->header + pes->data_index, p, len);
1217 pes->data_index += len;
1220 if (pes->data_index == PES_HEADER_SIZE) {
1221 pes->pes_header_size = pes->header[8] + 9;
1222 pes->state = MPEGTS_PESHEADER_FILL;
1225 case MPEGTS_PESHEADER_FILL:
1226 len = pes->pes_header_size - pes->data_index;
1228 return AVERROR_INVALIDDATA;
1231 memcpy(pes->header + pes->data_index, p, len);
1232 pes->data_index += len;
1235 if (pes->data_index == pes->pes_header_size) {
1237 unsigned int flags, pes_ext, skip;
1239 flags = pes->header[7];
1240 r = pes->header + 9;
1241 pes->pts = AV_NOPTS_VALUE;
1242 pes->dts = AV_NOPTS_VALUE;
1243 if ((flags & 0xc0) == 0x80) {
1244 pes->dts = pes->pts = ff_parse_pes_pts(r);
1246 } else if ((flags & 0xc0) == 0xc0) {
1247 pes->pts = ff_parse_pes_pts(r);
1249 pes->dts = ff_parse_pes_pts(r);
1252 pes->extended_stream_id = -1;
1253 if (flags & 0x01) { /* PES extension */
1255 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1256 skip = (pes_ext >> 4) & 0xb;
1259 if ((pes_ext & 0x41) == 0x01 &&
1260 (r + 2) <= (pes->header + pes->pes_header_size)) {
1261 /* PES extension 2 */
1262 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1263 pes->extended_stream_id = r[1];
1267 /* we got the full header. We parse it and get the payload */
1268 pes->state = MPEGTS_PAYLOAD;
1269 pes->data_index = 0;
1270 if (pes->stream_type == 0x12 && buf_size > 0) {
1271 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1273 pes->pes_header_size += sl_header_bytes;
1274 p += sl_header_bytes;
1275 buf_size -= sl_header_bytes;
1277 if (pes->stream_type == 0x15 && buf_size >= 5) {
1278 /* skip metadata access unit header */
1279 pes->pes_header_size += 5;
1283 if ( pes->ts->fix_teletext_pts
1284 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1285 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1287 AVProgram *p = NULL;
1289 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1290 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1291 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1293 AVStream *st = NULL;
1294 if (f->type == MPEGTS_PES) {
1295 PESContext *pcrpes = f->u.pes_filter.opaque;
1298 } else if (f->type == MPEGTS_PCR) {
1300 for (i = 0; i < p->nb_stream_indexes; i++) {
1301 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1302 if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1306 if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1307 // teletext packets do not always have correct timestamps,
1308 // the standard says they should be handled after 40.6 ms at most,
1309 // and the pcr error to this packet should be no more than 100 ms.
1310 // TODO: we should interpolate the PCR, not just use the last one
1311 int64_t pcr = f->last_pcr / 300;
1313 pes->st->pts_wrap_reference = st->pts_wrap_reference;
1314 pes->st->pts_wrap_behavior = st->pts_wrap_behavior;
1315 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1316 pes->pts = pes->dts = pcr;
1317 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1318 pes->dts > pcr + 3654 + 9000) {
1319 pes->pts = pes->dts = pcr + 3654 + 9000;
1320 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1321 pes->dts > pcr + 10*90000) { //10sec
1322 pes->pts = pes->dts = pcr + 3654 + 9000;
1331 av_log(pes->stream, AV_LOG_VERBOSE,
1332 "Forcing DTS/PTS to be unset for a "
1333 "non-trustworthy PES packet for PID %d as "
1334 "PCR hasn't been received yet.\n",
1336 pes->dts = pes->pts = AV_NOPTS_VALUE;
1341 case MPEGTS_PAYLOAD:
1343 if (pes->data_index > 0 &&
1344 pes->data_index + buf_size > pes->total_size) {
1345 ret = new_pes_packet(pes, ts->pkt);
1348 pes->total_size = MAX_PES_PAYLOAD;
1349 pes->buffer = av_buffer_alloc(pes->total_size +
1350 AV_INPUT_BUFFER_PADDING_SIZE);
1352 return AVERROR(ENOMEM);
1354 } else if (pes->data_index == 0 &&
1355 buf_size > pes->total_size) {
1356 // pes packet size is < ts size packet and pes data is padded with 0xff
1357 // not sure if this is legal in ts but see issue #2392
1358 buf_size = pes->total_size;
1360 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1361 pes->data_index += buf_size;
1362 /* emit complete packets with known packet size
1363 * decreases demuxer delay for infrequent packets like subtitles from
1364 * a couple of seconds to milliseconds for properly muxed files.
1365 * total_size is the number of bytes following pes_packet_length
1366 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1367 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1368 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1370 ret = new_pes_packet(pes, ts->pkt);
1386 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1391 /* if no pid found, then add a pid context */
1392 pes = av_mallocz(sizeof(PESContext));
1396 pes->stream = ts->stream;
1398 pes->pcr_pid = pcr_pid;
1399 pes->state = MPEGTS_SKIP;
1400 pes->pts = AV_NOPTS_VALUE;
1401 pes->dts = AV_NOPTS_VALUE;
1402 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1411 typedef struct MP4DescrParseContext {
1415 Mp4Descr *active_descr;
1417 int max_descr_count;
1419 int predefined_SLConfigDescriptor_seen;
1420 } MP4DescrParseContext;
1422 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1423 const uint8_t *buf, unsigned size,
1424 Mp4Descr *descr, int max_descr_count)
1427 if (size > (1 << 30))
1428 return AVERROR_INVALIDDATA;
1430 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1431 NULL, NULL, NULL, NULL)) < 0)
1438 d->active_descr = NULL;
1439 d->max_descr_count = max_descr_count;
1444 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1446 int64_t new_off = avio_tell(pb);
1447 (*len) -= new_off - *off;
1451 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1454 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1457 int ret = parse_mp4_descr(d, off, len, 0);
1460 update_offsets(&d->pb, &off, &len);
1465 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1467 avio_rb16(&d->pb); // ID
1473 update_offsets(&d->pb, &off, &len);
1474 return parse_mp4_descr_arr(d, off, len);
1477 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1482 id_flags = avio_rb16(&d->pb);
1483 if (!(id_flags & 0x0020)) { // URL_Flag
1484 update_offsets(&d->pb, &off, &len);
1485 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1491 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1496 if (d->descr_count >= d->max_descr_count)
1497 return AVERROR_INVALIDDATA;
1498 ff_mp4_parse_es_descr(&d->pb, &es_id);
1499 d->active_descr = d->descr + (d->descr_count++);
1501 d->active_descr->es_id = es_id;
1502 update_offsets(&d->pb, &off, &len);
1503 if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1505 update_offsets(&d->pb, &off, &len);
1507 ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1508 d->active_descr = NULL;
1512 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1515 Mp4Descr *descr = d->active_descr;
1517 return AVERROR_INVALIDDATA;
1518 d->active_descr->dec_config_descr = av_malloc(len);
1519 if (!descr->dec_config_descr)
1520 return AVERROR(ENOMEM);
1521 descr->dec_config_descr_len = len;
1522 avio_read(&d->pb, descr->dec_config_descr, len);
1526 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1528 Mp4Descr *descr = d->active_descr;
1531 return AVERROR_INVALIDDATA;
1533 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1534 descr->sl.dst = avio_r8(&d->pb); \
1535 if (descr->sl.dst > maxv) { \
1536 descr->sl.dst = maxv; \
1537 return AVERROR_INVALIDDATA; \
1541 predefined = avio_r8(&d->pb);
1544 int flags = avio_r8(&d->pb);
1545 descr->sl.use_au_start = !!(flags & 0x80);
1546 descr->sl.use_au_end = !!(flags & 0x40);
1547 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1548 descr->sl.use_padding = !!(flags & 0x08);
1549 descr->sl.use_timestamps = !!(flags & 0x04);
1550 descr->sl.use_idle = !!(flags & 0x02);
1551 descr->sl.timestamp_res = avio_rb32(&d->pb);
1553 R8_CHECK_CLIP_MAX(timestamp_len, 63);
1554 R8_CHECK_CLIP_MAX(ocr_len, 63);
1555 R8_CHECK_CLIP_MAX(au_len, 31);
1556 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1557 lengths = avio_rb16(&d->pb);
1558 descr->sl.degr_prior_len = lengths >> 12;
1559 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1560 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1561 } else if (!d->predefined_SLConfigDescriptor_seen){
1562 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1563 d->predefined_SLConfigDescriptor_seen = 1;
1568 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1572 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1575 update_offsets(&d->pb, &off, &len);
1576 if (len < 0 || len1 > len || len1 <= 0) {
1577 av_log(d->s, AV_LOG_ERROR,
1578 "Tag %x length violation new length %d bytes remaining %d\n",
1580 return AVERROR_INVALIDDATA;
1583 if (d->level++ >= MAX_LEVEL) {
1584 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1585 ret = AVERROR_INVALIDDATA;
1589 if (target_tag && tag != target_tag) {
1590 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1592 ret = AVERROR_INVALIDDATA;
1598 ret = parse_MP4IODescrTag(d, off, len1);
1601 ret = parse_MP4ODescrTag(d, off, len1);
1604 ret = parse_MP4ESDescrTag(d, off, len1);
1606 case MP4DecConfigDescrTag:
1607 ret = parse_MP4DecConfigDescrTag(d, off, len1);
1610 ret = parse_MP4SLDescrTag(d, off, len1);
1617 avio_seek(&d->pb, off + len1, SEEK_SET);
1621 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1622 Mp4Descr *descr, int *descr_count, int max_descr_count)
1624 MP4DescrParseContext d;
1627 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1631 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1633 *descr_count = d.descr_count;
1637 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1638 Mp4Descr *descr, int *descr_count, int max_descr_count)
1640 MP4DescrParseContext d;
1643 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1647 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1649 *descr_count = d.descr_count;
1653 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1656 MpegTSContext *ts = filter->u.section_filter.opaque;
1657 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1659 const uint8_t *p, *p_end;
1661 int mp4_descr_count = 0;
1662 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1664 AVFormatContext *s = ts->stream;
1666 p_end = section + section_len - 4;
1668 if (parse_section_header(&h, &p, p_end) < 0)
1670 if (h.tid != M4OD_TID)
1672 if (skip_identical(&h, tssf))
1675 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1676 MAX_MP4_DESCR_COUNT);
1678 for (pid = 0; pid < NB_PID_MAX; pid++) {
1681 for (i = 0; i < mp4_descr_count; i++) {
1684 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1686 if (ts->pids[pid]->type != MPEGTS_PES) {
1687 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1690 pes = ts->pids[pid]->u.pes_filter.opaque;
1695 pes->sl = mp4_descr[i].sl;
1697 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1698 mp4_descr[i].dec_config_descr_len, 0,
1699 NULL, NULL, NULL, NULL);
1700 ff_mp4_read_dec_config_descr(s, st, &pb);
1701 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1702 st->codecpar->extradata_size > 0)
1703 st->need_parsing = 0;
1704 if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1705 st->codecpar->extradata_size > 0)
1706 st->need_parsing = 0;
1708 st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1709 st->internal->need_context_update = 1;
1712 for (i = 0; i < mp4_descr_count; i++)
1713 av_free(mp4_descr[i].dec_config_descr);
1716 static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1719 AVProgram *prg = NULL;
1720 MpegTSContext *ts = filter->u.section_filter.opaque;
1722 int idx = ff_find_stream_index(ts->stream, filter->pid);
1726 new_data_packet(section, section_len, ts->pkt);
1727 ts->pkt->stream_index = idx;
1728 prg = av_find_program_from_stream(ts->stream, NULL, idx);
1729 if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1730 MpegTSFilter *f = ts->pids[prg->pcr_pid];
1731 if (f && f->last_pcr != -1)
1732 ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1738 static const uint8_t opus_coupled_stream_cnt[9] = {
1739 1, 0, 1, 1, 2, 2, 2, 3, 3
1742 static const uint8_t opus_stream_cnt[9] = {
1743 1, 1, 1, 2, 2, 3, 4, 4, 5,
1746 static const uint8_t opus_channel_map[8][8] = {
1754 { 0,6,1,2,3,4,5,7 },
1757 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1758 const uint8_t **pp, const uint8_t *desc_list_end,
1759 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1762 const uint8_t *desc_end;
1763 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1767 desc_tag = get8(pp, desc_list_end);
1769 return AVERROR_INVALIDDATA;
1770 desc_len = get8(pp, desc_list_end);
1772 return AVERROR_INVALIDDATA;
1773 desc_end = *pp + desc_len;
1774 if (desc_end > desc_list_end)
1775 return AVERROR_INVALIDDATA;
1777 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1779 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1780 stream_type == STREAM_TYPE_PRIVATE_DATA)
1781 mpegts_find_stream_type(st, desc_tag, DESC_types);
1784 case 0x02: /* video stream descriptor */
1785 if (get8(pp, desc_end) & 0x1) {
1786 st->disposition |= AV_DISPOSITION_STILL_IMAGE;
1789 case 0x1E: /* SL descriptor */
1790 desc_es_id = get16(pp, desc_end);
1793 if (ts && ts->pids[pid])
1794 ts->pids[pid]->es_id = desc_es_id;
1795 for (i = 0; i < mp4_descr_count; i++)
1796 if (mp4_descr[i].dec_config_descr_len &&
1797 mp4_descr[i].es_id == desc_es_id) {
1799 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1800 mp4_descr[i].dec_config_descr_len, 0,
1801 NULL, NULL, NULL, NULL);
1802 ff_mp4_read_dec_config_descr(fc, st, &pb);
1803 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1804 st->codecpar->extradata_size > 0) {
1805 st->need_parsing = 0;
1806 st->internal->need_context_update = 1;
1808 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1809 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1812 case 0x1F: /* FMC descriptor */
1813 if (get16(pp, desc_end) < 0)
1815 if (mp4_descr_count > 0 &&
1816 (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1817 (st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1818 st->request_probe > 0) &&
1819 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1821 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1822 mp4_descr->dec_config_descr_len, 0,
1823 NULL, NULL, NULL, NULL);
1824 ff_mp4_read_dec_config_descr(fc, st, &pb);
1825 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1826 st->codecpar->extradata_size > 0) {
1827 st->request_probe = st->need_parsing = 0;
1828 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1829 st->internal->need_context_update = 1;
1833 case 0x56: /* DVB teletext descriptor */
1835 uint8_t *extradata = NULL;
1836 int language_count = desc_len / 5;
1838 if (desc_len > 0 && desc_len % 5 != 0)
1839 return AVERROR_INVALIDDATA;
1841 if (language_count > 0) {
1842 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1843 av_assert0(language_count <= sizeof(language) / 4);
1845 if (st->codecpar->extradata == NULL) {
1846 if (ff_alloc_extradata(st->codecpar, language_count * 2)) {
1847 return AVERROR(ENOMEM);
1851 if (st->codecpar->extradata_size < language_count * 2)
1852 return AVERROR_INVALIDDATA;
1854 extradata = st->codecpar->extradata;
1856 for (i = 0; i < language_count; i++) {
1857 language[i * 4 + 0] = get8(pp, desc_end);
1858 language[i * 4 + 1] = get8(pp, desc_end);
1859 language[i * 4 + 2] = get8(pp, desc_end);
1860 language[i * 4 + 3] = ',';
1862 memcpy(extradata, *pp, 2);
1868 language[i * 4 - 1] = 0;
1869 av_dict_set(&st->metadata, "language", language, 0);
1870 st->internal->need_context_update = 1;
1874 case 0x59: /* subtitling descriptor */
1876 /* 8 bytes per DVB subtitle substream data:
1877 * ISO_639_language_code (3 bytes),
1878 * subtitling_type (1 byte),
1879 * composition_page_id (2 bytes),
1880 * ancillary_page_id (2 bytes) */
1881 int language_count = desc_len / 8;
1883 if (desc_len > 0 && desc_len % 8 != 0)
1884 return AVERROR_INVALIDDATA;
1886 if (language_count > 1) {
1887 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1890 if (language_count > 0) {
1893 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1894 av_assert0(language_count <= sizeof(language) / 4);
1896 if (st->codecpar->extradata == NULL) {
1897 if (ff_alloc_extradata(st->codecpar, language_count * 5)) {
1898 return AVERROR(ENOMEM);
1902 if (st->codecpar->extradata_size < language_count * 5)
1903 return AVERROR_INVALIDDATA;
1905 extradata = st->codecpar->extradata;
1907 for (i = 0; i < language_count; i++) {
1908 language[i * 4 + 0] = get8(pp, desc_end);
1909 language[i * 4 + 1] = get8(pp, desc_end);
1910 language[i * 4 + 2] = get8(pp, desc_end);
1911 language[i * 4 + 3] = ',';
1913 /* hearing impaired subtitles detection using subtitling_type */
1915 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1916 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1917 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1918 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1919 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1920 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1921 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1925 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1926 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1932 language[i * 4 - 1] = 0;
1933 av_dict_set(&st->metadata, "language", language, 0);
1934 st->internal->need_context_update = 1;
1938 case 0x0a: /* ISO 639 language descriptor */
1939 for (i = 0; i + 4 <= desc_len; i += 4) {
1940 language[i + 0] = get8(pp, desc_end);
1941 language[i + 1] = get8(pp, desc_end);
1942 language[i + 2] = get8(pp, desc_end);
1943 language[i + 3] = ',';
1944 switch (get8(pp, desc_end)) {
1946 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1949 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1952 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1953 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
1957 if (i && language[0]) {
1958 language[i - 1] = 0;
1959 /* don't overwrite language, as it may already have been set by
1960 * another, more specific descriptor (e.g. supplementary audio) */
1961 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
1964 case 0x05: /* registration descriptor */
1965 st->codecpar->codec_tag = bytestream_get_le32(pp);
1966 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1967 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) {
1968 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1969 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1970 st->request_probe = 50;
1973 case 0x52: /* stream identifier descriptor */
1974 st->stream_identifier = 1 + get8(pp, desc_end);
1976 case 0x26: /* metadata descriptor */
1977 if (get16(pp, desc_end) == 0xFFFF)
1979 if (get8(pp, desc_end) == 0xFF) {
1980 st->codecpar->codec_tag = bytestream_get_le32(pp);
1981 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
1982 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
1985 case 0x7f: /* DVB extension descriptor */
1986 ext_desc_tag = get8(pp, desc_end);
1987 if (ext_desc_tag < 0)
1988 return AVERROR_INVALIDDATA;
1989 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
1990 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1991 if (!st->codecpar->extradata) {
1992 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
1993 AV_INPUT_BUFFER_PADDING_SIZE);
1994 if (!st->codecpar->extradata)
1995 return AVERROR(ENOMEM);
1997 st->codecpar->extradata_size = sizeof(opus_default_extradata);
1998 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
2000 channel_config_code = get8(pp, desc_end);
2001 if (channel_config_code < 0)
2002 return AVERROR_INVALIDDATA;
2003 if (channel_config_code <= 0x8) {
2004 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2005 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2006 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2007 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2008 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2010 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2012 st->need_parsing = AVSTREAM_PARSE_FULL;
2013 st->internal->need_context_update = 1;
2016 if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
2020 return AVERROR_INVALIDDATA;
2021 flags = get8(pp, desc_end);
2023 if ((flags & 0x80) == 0) /* mix_type */
2024 st->disposition |= AV_DISPOSITION_DEPENDENT;
2026 switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2028 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2029 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2032 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2035 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2039 if (flags & 0x01) { /* language_code_present */
2041 return AVERROR_INVALIDDATA;
2042 language[0] = get8(pp, desc_end);
2043 language[1] = get8(pp, desc_end);
2044 language[2] = get8(pp, desc_end);
2047 /* This language always has to override a possible
2048 * ISO 639 language descriptor language */
2050 av_dict_set(&st->metadata, "language", language, 0);
2054 case 0x6a: /* ac-3_descriptor */
2056 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2057 if (component_type_flag) {
2058 int component_type = get8(pp, desc_end);
2059 int service_type_mask = 0x38; // 0b00111000
2060 int service_type = ((component_type & service_type_mask) >> 3);
2061 if (service_type == 0x02 /* 0b010 */) {
2062 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2063 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2068 case 0x7a: /* enhanced_ac-3_descriptor */
2070 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2071 if (component_type_flag) {
2072 int component_type = get8(pp, desc_end);
2073 int service_type_mask = 0x38; // 0b00111000
2074 int service_type = ((component_type & service_type_mask) >> 3);
2075 if (service_type == 0x02 /* 0b010 */) {
2076 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2077 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2082 case 0xfd: /* ARIB data coding type descriptor */
2083 // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2085 if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2086 // This structure is defined in STD-B10, part 1, listing 5.4 and
2088 // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2089 // Component tag limits are documented in TR-B14, fascicle 2,
2090 // Vol. 3, Section 2, 4.2.8.1
2091 int actual_component_tag = st->stream_identifier - 1;
2092 int picked_profile = FF_PROFILE_UNKNOWN;
2093 int data_component_id = get16(pp, desc_end);
2094 if (data_component_id < 0)
2095 return AVERROR_INVALIDDATA;
2097 switch (data_component_id) {
2099 // [0x30..0x37] are component tags utilized for
2100 // non-mobile captioning service ("profile A").
2101 if (actual_component_tag >= 0x30 &&
2102 actual_component_tag <= 0x37) {
2103 picked_profile = FF_PROFILE_ARIB_PROFILE_A;
2107 // component tag 0x87 signifies a mobile/partial reception
2108 // (1seg) captioning service ("profile C").
2109 if (actual_component_tag == 0x87) {
2110 picked_profile = FF_PROFILE_ARIB_PROFILE_C;
2117 if (picked_profile == FF_PROFILE_UNKNOWN)
2120 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2121 st->codecpar->codec_id = AV_CODEC_ID_ARIB_CAPTION;
2122 st->codecpar->profile = picked_profile;
2123 st->request_probe = 0;
2133 static AVStream *find_matching_stream(MpegTSContext *ts, int pid,
2134 int stream_identifier, int pmt_stream_idx)
2136 AVFormatContext *s = ts->stream;
2138 AVStream *found = NULL;
2140 for (i = 0; i < s->nb_streams; i++) {
2141 AVStream *st = s->streams[i];
2142 if (stream_identifier != -1) { /* match based on "stream identifier descriptor" if present */
2143 if (st->stream_identifier == stream_identifier+1) {
2147 } else if (st->pmt_stream_idx == pmt_stream_idx) { /* match based on position within the PMT */
2154 av_log(ts->stream, AV_LOG_VERBOSE,
2155 "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2156 av_get_media_type_string(found->codecpar->codec_type),
2163 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2165 const uint8_t **pp = &p;
2166 const uint8_t *desc_list_end;
2167 const uint8_t *desc_end;
2169 int desc_len, desc_tag;
2171 desc_list_len = get16(pp, p_end);
2172 if (desc_list_len < 0)
2174 desc_list_len &= 0xfff;
2175 desc_list_end = p + desc_list_len;
2176 if (desc_list_end > p_end)
2180 desc_tag = get8(pp, desc_list_end);
2183 desc_len = get8(pp, desc_list_end);
2186 desc_end = *pp + desc_len;
2187 if (desc_end > desc_list_end)
2190 if (desc_tag == 0x52) {
2191 return get8(pp, desc_end);
2199 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2201 return !(stream_type == 0x13 ||
2202 (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
2205 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2207 MpegTSContext *ts = filter->u.section_filter.opaque;
2208 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2209 SectionHeader h1, *h = &h1;
2212 const uint8_t *p, *p_end, *desc_list_end;
2213 int program_info_length, pcr_pid, pid, stream_type;
2215 uint32_t prog_reg_desc = 0; /* registration descriptor */
2216 int stream_identifier = -1;
2218 int mp4_descr_count = 0;
2219 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2222 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2223 hex_dump_debug(ts->stream, section, section_len);
2225 p_end = section + section_len - 4;
2227 if (parse_section_header(h, &p, p_end) < 0)
2229 if (h->tid != PMT_TID)
2231 if (skip_identical(h, tssf))
2234 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2235 h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2237 if (!ts->scan_all_pmts && ts->skip_changes)
2240 if (ts->skip_unknown_pmt && !get_program(ts, h->id))
2242 if (!ts->skip_clear)
2243 clear_program(ts, h->id);
2245 pcr_pid = get16(&p, p_end);
2249 add_pid_to_pmt(ts, h->id, pcr_pid);
2250 update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2252 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2254 program_info_length = get16(&p, p_end);
2255 if (program_info_length < 0)
2257 program_info_length &= 0xfff;
2258 while (program_info_length >= 2) {
2260 tag = get8(&p, p_end);
2261 len = get8(&p, p_end);
2263 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2265 if (len > program_info_length - 2)
2266 // something else is broken, exit the program_descriptors_loop
2268 program_info_length -= len + 2;
2269 if (tag == 0x1d) { // IOD descriptor
2270 get8(&p, p_end); // scope
2271 get8(&p, p_end); // label
2273 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2274 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2275 } else if (tag == 0x05 && len >= 4) { // registration descriptor
2276 prog_reg_desc = bytestream_get_le32(&p);
2281 p += program_info_length;
2285 // stop parsing after pmt, we found header
2286 if (!ts->stream->nb_streams)
2289 set_pmt_found(ts, h->id);
2292 for (i = 0; ; i++) {
2295 stream_type = get8(&p, p_end);
2296 if (stream_type < 0)
2298 pid = get16(&p, p_end);
2302 if (pid == ts->current_pid)
2305 if (ts->merge_pmt_versions)
2306 stream_identifier = parse_stream_identifier_desc(p, p_end);
2308 /* now create stream */
2309 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2310 pes = ts->pids[pid]->u.pes_filter.opaque;
2311 if (ts->merge_pmt_versions && !pes->st) {
2312 st = find_matching_stream(ts, pid, stream_identifier, i);
2315 pes->stream_type = stream_type;
2320 pes->st = avformat_new_stream(pes->stream, NULL);
2323 pes->st->id = pes->pid;
2324 pes->st->program_num = h->id;
2325 pes->st->pmt_version = h->version;
2326 pes->st->pmt_stream_idx = i;
2329 } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2331 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2332 pes = add_pes_stream(ts, pid, pcr_pid);
2333 if (ts->merge_pmt_versions && pes && !pes->st) {
2334 st = find_matching_stream(ts, pid, stream_identifier, i);
2337 pes->stream_type = stream_type;
2341 if (pes && !pes->st) {
2342 st = avformat_new_stream(pes->stream, NULL);
2346 st->program_num = h->id;
2347 st->pmt_version = h->version;
2348 st->pmt_stream_idx = i;
2351 int idx = ff_find_stream_index(ts->stream, pid);
2353 st = ts->stream->streams[idx];
2355 if (ts->merge_pmt_versions && !st) {
2356 st = find_matching_stream(ts, pid, stream_identifier, i);
2359 st = avformat_new_stream(ts->stream, NULL);
2363 st->program_num = h->id;
2364 st->pmt_version = h->version;
2365 st->pmt_stream_idx = i;
2366 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2367 if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2368 mpegts_find_stream_type(st, stream_type, SCTE_types);
2369 mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2377 if (pes && !pes->stream_type)
2378 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2380 add_pid_to_pmt(ts, h->id, pid);
2382 av_program_add_stream_index(ts->stream, h->id, st->index);
2384 desc_list_len = get16(&p, p_end);
2385 if (desc_list_len < 0)
2387 desc_list_len &= 0xfff;
2388 desc_list_end = p + desc_list_len;
2389 if (desc_list_end > p_end)
2392 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2393 desc_list_end, mp4_descr,
2394 mp4_descr_count, pid, ts) < 0)
2397 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2398 stream_type == 0x83 && pes->sub_st) {
2399 av_program_add_stream_index(ts->stream, h->id,
2400 pes->sub_st->index);
2401 pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2407 if (!ts->pids[pcr_pid])
2408 mpegts_open_pcr_filter(ts, pcr_pid);
2411 for (i = 0; i < mp4_descr_count; i++)
2412 av_free(mp4_descr[i].dec_config_descr);
2415 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2417 MpegTSContext *ts = filter->u.section_filter.opaque;
2418 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2419 SectionHeader h1, *h = &h1;
2420 const uint8_t *p, *p_end;
2424 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2425 hex_dump_debug(ts->stream, section, section_len);
2427 p_end = section + section_len - 4;
2429 if (parse_section_header(h, &p, p_end) < 0)
2431 if (h->tid != PAT_TID)
2433 if (ts->skip_changes)
2436 if (skip_identical(h, tssf))
2438 ts->stream->ts_id = h->id;
2442 sid = get16(&p, p_end);
2445 pmt_pid = get16(&p, p_end);
2450 if (pmt_pid == ts->current_pid)
2453 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2455 if (sid == 0x0000) {
2458 MpegTSFilter *fil = ts->pids[pmt_pid];
2459 program = av_new_program(ts->stream, sid);
2461 program->program_num = sid;
2462 program->pmt_pid = pmt_pid;
2465 if ( fil->type != MPEGTS_SECTION
2466 || fil->pid != pmt_pid
2467 || fil->u.section_filter.section_cb != pmt_cb)
2468 mpegts_close_filter(ts, ts->pids[pmt_pid]);
2470 if (!ts->pids[pmt_pid])
2471 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2472 add_pat_entry(ts, sid);
2473 add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2474 add_pid_to_pmt(ts, sid, pmt_pid);
2480 for (j=0; j<ts->stream->nb_programs; j++) {
2481 for (i = 0; i < ts->nb_prg; i++)
2482 if (ts->prg[i].id == ts->stream->programs[j]->id)
2484 if (i==ts->nb_prg && !ts->skip_clear)
2485 clear_avprogram(ts, ts->stream->programs[j]->id);
2490 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2492 MpegTSContext *ts = filter->u.section_filter.opaque;
2493 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2494 SectionHeader h1, *h = &h1;
2495 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2496 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2497 char *name, *provider_name;
2499 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2500 hex_dump_debug(ts->stream, section, section_len);
2502 p_end = section + section_len - 4;
2504 if (parse_section_header(h, &p, p_end) < 0)
2506 if (h->tid != SDT_TID)
2508 if (ts->skip_changes)
2510 if (skip_identical(h, tssf))
2513 onid = get16(&p, p_end);
2516 val = get8(&p, p_end);
2520 sid = get16(&p, p_end);
2523 val = get8(&p, p_end);
2526 desc_list_len = get16(&p, p_end);
2527 if (desc_list_len < 0)
2529 desc_list_len &= 0xfff;
2530 desc_list_end = p + desc_list_len;
2531 if (desc_list_end > p_end)
2534 desc_tag = get8(&p, desc_list_end);
2537 desc_len = get8(&p, desc_list_end);
2538 desc_end = p + desc_len;
2539 if (desc_len < 0 || desc_end > desc_list_end)
2542 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2543 desc_tag, desc_len);
2547 service_type = get8(&p, p_end);
2548 if (service_type < 0)
2550 provider_name = getstr8(&p, p_end);
2553 name = getstr8(&p, p_end);
2555 AVProgram *program = av_new_program(ts->stream, sid);
2557 av_dict_set(&program->metadata, "service_name", name, 0);
2558 av_dict_set(&program->metadata, "service_provider",
2563 av_free(provider_name);
2574 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2575 const uint8_t *packet);
2577 /* handle one TS packet */
2578 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2581 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2582 has_adaptation, has_payload;
2583 const uint8_t *p, *p_end;
2586 pid = AV_RB16(packet + 1) & 0x1fff;
2587 is_start = packet[1] & 0x40;
2588 tss = ts->pids[pid];
2589 if (ts->auto_guess && !tss && is_start) {
2590 add_pes_stream(ts, pid, -1);
2591 tss = ts->pids[pid];
2596 tss->discard = discard_pid(ts, pid);
2599 ts->current_pid = pid;
2601 afc = (packet[3] >> 4) & 3;
2602 if (afc == 0) /* reserved value */
2604 has_adaptation = afc & 2;
2605 has_payload = afc & 1;
2606 is_discontinuity = has_adaptation &&
2607 packet[4] != 0 && /* with length > 0 */
2608 (packet[5] & 0x80); /* and discontinuity indicated */
2610 /* continuity check (currently not used) */
2611 cc = (packet[3] & 0xf);
2612 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2613 cc_ok = pid == 0x1FFF || // null packet PID
2620 av_log(ts->stream, AV_LOG_DEBUG,
2621 "Continuity check failed for pid %d expected %d got %d\n",
2622 pid, expected_cc, cc);
2623 if (tss->type == MPEGTS_PES) {
2624 PESContext *pc = tss->u.pes_filter.opaque;
2625 pc->flags |= AV_PKT_FLAG_CORRUPT;
2629 if (packet[1] & 0x80) {
2630 av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2631 if (tss->type == MPEGTS_PES) {
2632 PESContext *pc = tss->u.pes_filter.opaque;
2633 pc->flags |= AV_PKT_FLAG_CORRUPT;
2638 if (has_adaptation) {
2641 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2642 tss->last_pcr = pcr_h * 300 + pcr_l;
2643 /* skip adaptation field */
2646 /* if past the end of packet, ignore */
2647 p_end = packet + TS_PACKET_SIZE;
2648 if (p >= p_end || !has_payload)
2651 pos = avio_tell(ts->stream->pb);
2653 av_assert0(pos >= TS_PACKET_SIZE);
2654 ts->pos47_full = pos - TS_PACKET_SIZE;
2657 if (tss->type == MPEGTS_SECTION) {
2659 /* pointer field present */
2661 if (len > p_end - p)
2664 /* write remaining section bytes */
2665 write_section_data(ts, tss,
2667 /* check whether filter has been closed */
2673 write_section_data(ts, tss,
2678 write_section_data(ts, tss,
2683 // stop find_stream_info from waiting for more streams
2684 // when all programs have received a PMT
2685 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2687 for (i = 0; i < ts->nb_prg; i++) {
2688 if (!ts->prg[i].pmt_found)
2691 if (i == ts->nb_prg && ts->nb_prg > 0) {
2693 for (i = 0; i < ts->stream->nb_streams; i++) {
2694 AVStream *st = ts->stream->streams[i];
2695 if (st->codecpar->codec_type >= 0)
2696 types |= 1<<st->codecpar->codec_type;
2698 if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2699 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2700 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2707 // Note: The position here points actually behind the current packet.
2708 if (tss->type == MPEGTS_PES) {
2709 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2710 pos - ts->raw_packet_size)) < 0)
2718 static void reanalyze(MpegTSContext *ts) {
2719 AVIOContext *pb = ts->stream->pb;
2720 int64_t pos = avio_tell(pb);
2723 pos -= ts->pos47_full;
2724 if (pos == TS_PACKET_SIZE) {
2725 ts->size_stat[0] ++;
2726 } else if (pos == TS_DVHS_PACKET_SIZE) {
2727 ts->size_stat[1] ++;
2728 } else if (pos == TS_FEC_PACKET_SIZE) {
2729 ts->size_stat[2] ++;
2732 ts->size_stat_count ++;
2733 if (ts->size_stat_count > SIZE_STAT_THRESHOLD) {
2735 if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2736 newsize = TS_PACKET_SIZE;
2737 } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2738 newsize = TS_DVHS_PACKET_SIZE;
2739 } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2740 newsize = TS_FEC_PACKET_SIZE;
2742 if (newsize && newsize != ts->raw_packet_size) {
2743 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2744 ts->raw_packet_size = newsize;
2746 ts->size_stat_count = 0;
2747 memset(ts->size_stat, 0, sizeof(ts->size_stat));
2751 /* XXX: try to find a better synchro over several packets (use
2752 * get_packet_size() ?) */
2753 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2755 MpegTSContext *ts = s->priv_data;
2756 AVIOContext *pb = s->pb;
2758 uint64_t pos = avio_tell(pb);
2760 avio_seek(pb, -FFMIN(seekback, pos), SEEK_CUR);
2762 //Special case for files like 01c56b0dc1.ts
2763 if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2764 avio_seek(pb, 12, SEEK_CUR);
2768 for (i = 0; i < ts->resync_size; i++) {
2773 avio_seek(pb, -1, SEEK_CUR);
2774 reanalyze(s->priv_data);
2778 av_log(s, AV_LOG_ERROR,
2779 "max resync size reached, could not find sync byte\n");
2781 return AVERROR_INVALIDDATA;
2784 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2785 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2786 const uint8_t **data)
2788 AVIOContext *pb = s->pb;
2792 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2793 if (len != TS_PACKET_SIZE)
2794 return len < 0 ? len : AVERROR_EOF;
2795 /* check packet sync byte */
2796 if ((*data)[0] != 0x47) {
2797 /* find a new packet start */
2799 if (mpegts_resync(s, raw_packet_size, *data) < 0)
2800 return AVERROR(EAGAIN);
2810 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2812 AVIOContext *pb = s->pb;
2813 int skip = raw_packet_size - TS_PACKET_SIZE;
2815 avio_skip(pb, skip);
2818 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2820 AVFormatContext *s = ts->stream;
2821 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2822 const uint8_t *data;
2826 if (avio_tell(s->pb) != ts->last_pos) {
2828 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2829 /* seek detected, flush pes buffer */
2830 for (i = 0; i < NB_PID_MAX; i++) {
2832 if (ts->pids[i]->type == MPEGTS_PES) {
2833 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2834 av_buffer_unref(&pes->buffer);
2835 pes->data_index = 0;
2836 pes->state = MPEGTS_SKIP; /* skip until pes header */
2837 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2838 ts->pids[i]->u.section_filter.last_ver = -1;
2840 ts->pids[i]->last_cc = -1;
2841 ts->pids[i]->last_pcr = -1;
2848 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2851 if (nb_packets != 0 && packet_num >= nb_packets ||
2852 ts->stop_parse > 1) {
2853 ret = AVERROR(EAGAIN);
2856 if (ts->stop_parse > 0)
2859 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2862 ret = handle_packet(ts, data);
2863 finished_reading_packet(s, ts->raw_packet_size);
2867 ts->last_pos = avio_tell(s->pb);
2871 static int mpegts_probe(const AVProbeData *p)
2873 const int size = p->buf_size;
2877 int check_count = size / TS_FEC_PACKET_SIZE;
2878 #define CHECK_COUNT 10
2879 #define CHECK_BLOCK 100
2884 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2885 int left = FFMIN(check_count - i, CHECK_BLOCK);
2886 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2887 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2888 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2889 score = FFMAX3(score, dvhs_score, fec_score);
2891 maxscore = FFMAX(maxscore, score);
2894 sumscore = sumscore * CHECK_COUNT / check_count;
2895 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2897 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2899 if (check_count > CHECK_COUNT && sumscore > 6) {
2900 return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2901 } else if (check_count >= CHECK_COUNT && sumscore > 6) {
2902 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2903 } else if (check_count >= CHECK_COUNT && maxscore > 6) {
2904 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2905 } else if (sumscore > 6) {
2912 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2913 * (-1) if not available */
2914 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2916 int afc, len, flags;
2920 afc = (packet[3] >> 4) & 3;
2922 return AVERROR_INVALIDDATA;
2927 return AVERROR_INVALIDDATA;
2930 if (!(flags & 0x10))
2931 return AVERROR_INVALIDDATA;
2933 return AVERROR_INVALIDDATA;
2935 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2936 *ppcr_low = ((p[4] & 1) << 8) | p[5];
2940 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2942 /* NOTE: We attempt to seek on non-seekable files as well, as the
2943 * probe buffer usually is big enough. Only warn if the seek failed
2944 * on files where the seek should work. */
2945 if (avio_seek(pb, pos, SEEK_SET) < 0)
2946 av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2949 static int mpegts_read_header(AVFormatContext *s)
2951 MpegTSContext *ts = s->priv_data;
2952 AVIOContext *pb = s->pb;
2953 int64_t pos, probesize = s->probesize;
2955 s->internal->prefer_codec_framerate = 1;
2957 if (ffio_ensure_seekback(pb, probesize) < 0)
2958 av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2960 pos = avio_tell(pb);
2961 ts->raw_packet_size = get_packet_size(s);
2962 if (ts->raw_packet_size <= 0) {
2963 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2964 ts->raw_packet_size = TS_PACKET_SIZE;
2969 if (s->iformat == &ff_mpegts_demuxer) {
2972 /* first do a scan to get all the services */
2973 seek_back(s, pb, pos);
2975 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2977 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2979 handle_packets(ts, probesize / ts->raw_packet_size);
2980 /* if could not find service, enable auto_guess */
2984 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2986 s->ctx_flags |= AVFMTCTX_NOHEADER;
2989 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2990 int64_t pcrs[2], pcr_h;
2991 int packet_count[2];
2992 uint8_t packet[TS_PACKET_SIZE];
2993 const uint8_t *data;
2995 /* only read packets */
2997 st = avformat_new_stream(s, NULL);
2999 return AVERROR(ENOMEM);
3000 avpriv_set_pts_info(st, 60, 1, 27000000);
3001 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
3002 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
3004 /* we iterate until we find two PCRs to estimate the bitrate */
3009 ret = read_packet(s, packet, ts->raw_packet_size, &data);
3012 pid = AV_RB16(data + 1) & 0x1fff;
3013 if ((pcr_pid == -1 || pcr_pid == pid) &&
3014 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
3015 finished_reading_packet(s, ts->raw_packet_size);
3017 packet_count[nb_pcrs] = nb_packets;
3018 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
3021 if (pcrs[1] - pcrs[0] > 0) {
3022 /* the difference needs to be positive to make sense for bitrate computation */
3025 av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
3027 packet_count[0] = packet_count[1];
3032 finished_reading_packet(s, ts->raw_packet_size);
3037 /* NOTE1: the bitrate is computed without the FEC */
3038 /* NOTE2: it is only the bitrate of the start of the stream */
3039 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
3040 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
3041 s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
3042 st->codecpar->bit_rate = s->bit_rate;
3043 st->start_time = ts->cur_pcr;
3044 av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
3045 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
3048 seek_back(s, pb, pos);
3052 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
3054 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
3056 MpegTSContext *ts = s->priv_data;
3058 int64_t pcr_h, next_pcr_h, pos;
3059 int pcr_l, next_pcr_l;
3060 uint8_t pcr_buf[12];
3061 const uint8_t *data;
3063 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
3064 return AVERROR(ENOMEM);
3065 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
3066 pkt->pos = avio_tell(s->pb);
3068 av_packet_unref(pkt);
3071 if (data != pkt->data)
3072 memcpy(pkt->data, data, ts->raw_packet_size);
3073 finished_reading_packet(s, ts->raw_packet_size);
3074 if (ts->mpeg2ts_compute_pcr) {
3075 /* compute exact PCR for each packet */
3076 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
3077 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
3078 pos = avio_tell(s->pb);
3079 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
3080 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
3081 avio_read(s->pb, pcr_buf, 12);
3082 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
3083 /* XXX: not precise enough */
3085 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
3090 avio_seek(s->pb, pos, SEEK_SET);
3091 /* no next PCR found: we use previous increment */
3092 ts->cur_pcr = pcr_h * 300 + pcr_l;
3094 pkt->pts = ts->cur_pcr;
3095 pkt->duration = ts->pcr_incr;
3096 ts->cur_pcr += ts->pcr_incr;
3098 pkt->stream_index = 0;
3102 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
3104 MpegTSContext *ts = s->priv_data;
3109 ret = handle_packets(ts, 0);
3111 av_packet_unref(ts->pkt);
3112 /* flush pes data left */
3113 for (i = 0; i < NB_PID_MAX; i++)
3114 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
3115 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3116 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
3117 ret = new_pes_packet(pes, pkt);
3120 pes->state = MPEGTS_SKIP;
3127 if (!ret && pkt->size < 0)
3128 ret = AVERROR_INVALIDDATA;
3132 static void mpegts_free(MpegTSContext *ts)
3138 for (i = 0; i < NB_PID_MAX; i++)
3140 mpegts_close_filter(ts, ts->pids[i]);
3143 static int mpegts_read_close(AVFormatContext *s)
3145 MpegTSContext *ts = s->priv_data;
3150 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3151 int64_t *ppos, int64_t pos_limit)
3153 MpegTSContext *ts = s->priv_data;
3154 int64_t pos, timestamp;
3155 uint8_t buf[TS_PACKET_SIZE];
3156 int pcr_l, pcr_pid =
3157 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3158 int pos47 = ts->pos47_full % ts->raw_packet_size;
3160 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3161 ts->raw_packet_size + pos47;
3162 while(pos < pos_limit) {
3163 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3164 return AV_NOPTS_VALUE;
3165 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3166 return AV_NOPTS_VALUE;
3167 if (buf[0] != 0x47) {
3168 if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3169 return AV_NOPTS_VALUE;
3170 pos = avio_tell(s->pb);
3173 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3174 parse_pcr(×tamp, &pcr_l, buf) == 0) {
3178 pos += ts->raw_packet_size;
3181 return AV_NOPTS_VALUE;
3184 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3185 int64_t *ppos, int64_t pos_limit)
3187 MpegTSContext *ts = s->priv_data;
3189 int pos47 = ts->pos47_full % ts->raw_packet_size;
3190 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3191 ff_read_frame_flush(s);
3192 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3193 return AV_NOPTS_VALUE;
3194 while(pos < pos_limit) {
3197 av_init_packet(&pkt);
3198 ret = av_read_frame(s, &pkt);
3200 return AV_NOPTS_VALUE;
3201 if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
3202 ff_reduce_index(s, pkt.stream_index);
3203 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3204 if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
3205 int64_t dts = pkt.dts;
3207 av_packet_unref(&pkt);
3212 av_packet_unref(&pkt);
3215 return AV_NOPTS_VALUE;
3218 /**************************************************************/
3219 /* parsing functions - called from other demuxers such as RTP */
3221 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
3225 ts = av_mallocz(sizeof(MpegTSContext));
3228 /* no stream case, currently used by RTP */
3229 ts->raw_packet_size = TS_PACKET_SIZE;
3232 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3233 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3238 /* return the consumed length if a packet was output, or -1 if no
3239 * packet is output */
3240 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
3241 const uint8_t *buf, int len)
3249 if (len < TS_PACKET_SIZE)
3250 return AVERROR_INVALIDDATA;
3251 if (buf[0] != 0x47) {
3255 handle_packet(ts, buf);
3256 buf += TS_PACKET_SIZE;
3257 len -= TS_PACKET_SIZE;
3258 if (ts->stop_parse == 1)
3265 void avpriv_mpegts_parse_close(MpegTSContext *ts)
3271 AVInputFormat ff_mpegts_demuxer = {
3273 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3274 .priv_data_size = sizeof(MpegTSContext),
3275 .read_probe = mpegts_probe,
3276 .read_header = mpegts_read_header,
3277 .read_packet = mpegts_read_packet,
3278 .read_close = mpegts_read_close,
3279 .read_timestamp = mpegts_get_dts,
3280 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3281 .priv_class = &mpegts_class,
3284 AVInputFormat ff_mpegtsraw_demuxer = {
3285 .name = "mpegtsraw",
3286 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3287 .priv_data_size = sizeof(MpegTSContext),
3288 .read_header = mpegts_read_header,
3289 .read_packet = mpegts_raw_read_packet,
3290 .read_close = mpegts_read_close,
3291 .read_timestamp = mpegts_get_dts,
3292 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3293 .priv_class = &mpegtsraw_class,