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 { 0xd2, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS2 },
807 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
811 static const StreamType HDMV_types[] = {
812 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
813 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
814 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
815 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
816 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
817 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
818 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
819 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
820 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
821 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
822 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
827 static const StreamType SCTE_types[] = {
828 { 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
833 static const StreamType MISC_types[] = {
834 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
835 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
839 static const StreamType REGD_types[] = {
840 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
841 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
842 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
843 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
844 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
845 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
846 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
847 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
848 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
849 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
850 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
851 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
855 static const StreamType METADATA_types[] = {
856 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
857 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
861 /* descriptor present */
862 static const StreamType DESC_types[] = {
863 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
864 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
865 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
866 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
867 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
871 static void mpegts_find_stream_type(AVStream *st,
872 uint32_t stream_type,
873 const StreamType *types)
875 for (; types->stream_type; types++)
876 if (stream_type == types->stream_type) {
877 if (st->codecpar->codec_type != types->codec_type ||
878 st->codecpar->codec_id != types->codec_id) {
879 st->codecpar->codec_type = types->codec_type;
880 st->codecpar->codec_id = types->codec_id;
881 st->internal->need_context_update = 1;
883 st->request_probe = 0;
888 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
889 uint32_t stream_type, uint32_t prog_reg_desc)
891 int old_codec_type = st->codecpar->codec_type;
892 int old_codec_id = st->codecpar->codec_id;
893 int old_codec_tag = st->codecpar->codec_tag;
895 if (avcodec_is_open(st->internal->avctx)) {
896 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
900 avpriv_set_pts_info(st, 33, 1, 90000);
902 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
903 st->codecpar->codec_id = AV_CODEC_ID_NONE;
904 st->need_parsing = AVSTREAM_PARSE_FULL;
906 pes->stream_type = stream_type;
908 av_log(pes->stream, AV_LOG_DEBUG,
909 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
910 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
912 st->codecpar->codec_tag = pes->stream_type;
914 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
915 if (pes->stream_type == 4 || pes->stream_type == 0x0f)
916 st->request_probe = 50;
917 if ((prog_reg_desc == AV_RL32("HDMV") ||
918 prog_reg_desc == AV_RL32("HDPR")) &&
919 st->codecpar->codec_id == AV_CODEC_ID_NONE) {
920 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
921 if (pes->stream_type == 0x83) {
922 // HDMV TrueHD streams also contain an AC3 coded version of the
923 // audio track - add a second stream for this
925 // priv_data cannot be shared between streams
926 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
928 return AVERROR(ENOMEM);
929 memcpy(sub_pes, pes, sizeof(*sub_pes));
931 sub_st = avformat_new_stream(pes->stream, NULL);
934 return AVERROR(ENOMEM);
937 sub_st->id = pes->pid;
938 avpriv_set_pts_info(sub_st, 33, 1, 90000);
939 sub_st->priv_data = sub_pes;
940 sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
941 sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
942 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
943 sub_pes->sub_st = pes->sub_st = sub_st;
946 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
947 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
948 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
949 st->codecpar->codec_id = old_codec_id;
950 st->codecpar->codec_type = old_codec_type;
952 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
953 (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
954 st->probe_packets > 0 &&
955 stream_type == STREAM_TYPE_PRIVATE_DATA) {
956 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
957 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
958 st->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
961 /* queue a context update if properties changed */
962 if (old_codec_type != st->codecpar->codec_type ||
963 old_codec_id != st->codecpar->codec_id ||
964 old_codec_tag != st->codecpar->codec_tag)
965 st->internal->need_context_update = 1;
970 static void reset_pes_packet_state(PESContext *pes)
972 pes->pts = AV_NOPTS_VALUE;
973 pes->dts = AV_NOPTS_VALUE;
976 av_buffer_unref(&pes->buffer);
979 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
982 pkt->data = (uint8_t *)buffer;
986 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
992 pkt->buf = pes->buffer;
993 pkt->data = pes->buffer->data;
994 pkt->size = pes->data_index;
996 if (pes->total_size != MAX_PES_PAYLOAD &&
997 pes->pes_header_size + pes->data_index != pes->total_size +
999 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
1000 pes->flags |= AV_PKT_FLAG_CORRUPT;
1002 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1004 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
1005 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
1006 pkt->stream_index = pes->sub_st->index;
1008 pkt->stream_index = pes->st->index;
1009 pkt->pts = pes->pts;
1010 pkt->dts = pes->dts;
1011 /* store position of first TS packet of this PES packet */
1012 pkt->pos = pes->ts_packet_pos;
1013 pkt->flags = pes->flags;
1016 reset_pes_packet_state(pes);
1018 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
1020 return AVERROR(ENOMEM);
1021 *sd = pes->stream_id;
1026 static uint64_t get_ts64(GetBitContext *gb, int bits)
1028 if (get_bits_left(gb) < bits)
1029 return AV_NOPTS_VALUE;
1030 return get_bits64(gb, bits);
1033 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
1034 const uint8_t *buf, int buf_size)
1037 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1038 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1039 int dts_flag = -1, cts_flag = -1;
1040 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1041 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1042 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1044 memcpy(buf_padded, buf, buf_padded_size);
1046 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1048 if (sl->use_au_start)
1049 au_start_flag = get_bits1(&gb);
1051 au_end_flag = get_bits1(&gb);
1052 if (!sl->use_au_start && !sl->use_au_end)
1053 au_start_flag = au_end_flag = 1;
1054 if (sl->ocr_len > 0)
1055 ocr_flag = get_bits1(&gb);
1057 idle_flag = get_bits1(&gb);
1058 if (sl->use_padding)
1059 padding_flag = get_bits1(&gb);
1061 padding_bits = get_bits(&gb, 3);
1063 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1064 if (sl->packet_seq_num_len)
1065 skip_bits_long(&gb, sl->packet_seq_num_len);
1066 if (sl->degr_prior_len)
1068 skip_bits(&gb, sl->degr_prior_len);
1070 skip_bits_long(&gb, sl->ocr_len);
1071 if (au_start_flag) {
1072 if (sl->use_rand_acc_pt)
1074 if (sl->au_seq_num_len > 0)
1075 skip_bits_long(&gb, sl->au_seq_num_len);
1076 if (sl->use_timestamps) {
1077 dts_flag = get_bits1(&gb);
1078 cts_flag = get_bits1(&gb);
1081 if (sl->inst_bitrate_len)
1082 inst_bitrate_flag = get_bits1(&gb);
1084 dts = get_ts64(&gb, sl->timestamp_len);
1086 cts = get_ts64(&gb, sl->timestamp_len);
1088 skip_bits_long(&gb, sl->au_len);
1089 if (inst_bitrate_flag)
1090 skip_bits_long(&gb, sl->inst_bitrate_len);
1093 if (dts != AV_NOPTS_VALUE)
1095 if (cts != AV_NOPTS_VALUE)
1098 if (sl->timestamp_len && sl->timestamp_res)
1099 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1101 return (get_bits_count(&gb) + 7) >> 3;
1104 /* return non zero if a packet could be constructed */
1105 static int mpegts_push_data(MpegTSFilter *filter,
1106 const uint8_t *buf, int buf_size, int is_start,
1109 PESContext *pes = filter->u.pes_filter.opaque;
1110 MpegTSContext *ts = pes->ts;
1118 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1119 ret = new_pes_packet(pes, ts->pkt);
1124 reset_pes_packet_state(pes);
1126 pes->state = MPEGTS_HEADER;
1127 pes->ts_packet_pos = pos;
1130 while (buf_size > 0) {
1131 switch (pes->state) {
1133 len = PES_START_SIZE - pes->data_index;
1136 memcpy(pes->header + pes->data_index, p, len);
1137 pes->data_index += len;
1140 if (pes->data_index == PES_START_SIZE) {
1141 /* we got all the PES or section header. We can now
1143 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1144 pes->header[2] == 0x01) {
1145 /* it must be an MPEG-2 PES stream */
1146 code = pes->header[3] | 0x100;
1147 av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1149 pes->stream_id = pes->header[3];
1151 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1153 pes->sub_st->discard == AVDISCARD_ALL)) ||
1154 code == 0x1be) /* padding_stream */
1157 /* stream not present in PMT */
1159 if (ts->skip_changes)
1161 if (ts->merge_pmt_versions)
1162 goto skip; /* wait for PMT to merge new stream */
1164 pes->st = avformat_new_stream(ts->stream, NULL);
1166 return AVERROR(ENOMEM);
1167 pes->st->id = pes->pid;
1168 mpegts_set_stream_info(pes->st, pes, 0, 0);
1171 pes->total_size = AV_RB16(pes->header + 4);
1172 /* NOTE: a zero total size means the PES size is
1174 if (!pes->total_size)
1175 pes->total_size = MAX_PES_PAYLOAD;
1177 /* allocate pes buffer */
1178 pes->buffer = av_buffer_alloc(pes->total_size +
1179 AV_INPUT_BUFFER_PADDING_SIZE);
1181 return AVERROR(ENOMEM);
1183 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1184 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1185 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1186 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1187 pes->state = MPEGTS_PESHEADER;
1188 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1189 av_log(pes->stream, AV_LOG_TRACE,
1190 "pid=%x stream_type=%x probing\n",
1193 pes->st->request_probe = 1;
1196 pes->pes_header_size = 6;
1197 pes->state = MPEGTS_PAYLOAD;
1198 pes->data_index = 0;
1201 /* otherwise, it should be a table */
1204 pes->state = MPEGTS_SKIP;
1209 /**********************************************/
1210 /* PES packing parsing */
1211 case MPEGTS_PESHEADER:
1212 len = PES_HEADER_SIZE - pes->data_index;
1214 return AVERROR_INVALIDDATA;
1217 memcpy(pes->header + pes->data_index, p, len);
1218 pes->data_index += len;
1221 if (pes->data_index == PES_HEADER_SIZE) {
1222 pes->pes_header_size = pes->header[8] + 9;
1223 pes->state = MPEGTS_PESHEADER_FILL;
1226 case MPEGTS_PESHEADER_FILL:
1227 len = pes->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->pes_header_size) {
1238 unsigned int flags, pes_ext, skip;
1240 flags = pes->header[7];
1241 r = pes->header + 9;
1242 pes->pts = AV_NOPTS_VALUE;
1243 pes->dts = AV_NOPTS_VALUE;
1244 if ((flags & 0xc0) == 0x80) {
1245 pes->dts = pes->pts = ff_parse_pes_pts(r);
1247 } else if ((flags & 0xc0) == 0xc0) {
1248 pes->pts = ff_parse_pes_pts(r);
1250 pes->dts = ff_parse_pes_pts(r);
1253 pes->extended_stream_id = -1;
1254 if (flags & 0x01) { /* PES extension */
1256 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1257 skip = (pes_ext >> 4) & 0xb;
1260 if ((pes_ext & 0x41) == 0x01 &&
1261 (r + 2) <= (pes->header + pes->pes_header_size)) {
1262 /* PES extension 2 */
1263 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1264 pes->extended_stream_id = r[1];
1268 /* we got the full header. We parse it and get the payload */
1269 pes->state = MPEGTS_PAYLOAD;
1270 pes->data_index = 0;
1271 if (pes->stream_type == 0x12 && buf_size > 0) {
1272 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1274 pes->pes_header_size += sl_header_bytes;
1275 p += sl_header_bytes;
1276 buf_size -= sl_header_bytes;
1278 if (pes->stream_type == 0x15 && buf_size >= 5) {
1279 /* skip metadata access unit header */
1280 pes->pes_header_size += 5;
1284 if ( pes->ts->fix_teletext_pts
1285 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1286 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1288 AVProgram *p = NULL;
1290 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1291 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1292 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1294 AVStream *st = NULL;
1295 if (f->type == MPEGTS_PES) {
1296 PESContext *pcrpes = f->u.pes_filter.opaque;
1299 } else if (f->type == MPEGTS_PCR) {
1301 for (i = 0; i < p->nb_stream_indexes; i++) {
1302 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1303 if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1307 if (f->last_pcr != -1 && !f->discard) {
1308 // teletext packets do not always have correct timestamps,
1309 // the standard says they should be handled after 40.6 ms at most,
1310 // and the pcr error to this packet should be no more than 100 ms.
1311 // TODO: we should interpolate the PCR, not just use the last one
1312 int64_t pcr = f->last_pcr / 300;
1315 pes->st->pts_wrap_reference = st->pts_wrap_reference;
1316 pes->st->pts_wrap_behavior = st->pts_wrap_behavior;
1318 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1319 pes->pts = pes->dts = pcr;
1320 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1321 pes->dts > pcr + 3654 + 9000) {
1322 pes->pts = pes->dts = pcr + 3654 + 9000;
1323 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1324 pes->dts > pcr + 10*90000) { //10sec
1325 pes->pts = pes->dts = pcr + 3654 + 9000;
1334 av_log(pes->stream, AV_LOG_VERBOSE,
1335 "Forcing DTS/PTS to be unset for a "
1336 "non-trustworthy PES packet for PID %d as "
1337 "PCR hasn't been received yet.\n",
1339 pes->dts = pes->pts = AV_NOPTS_VALUE;
1344 case MPEGTS_PAYLOAD:
1346 if (pes->data_index > 0 &&
1347 pes->data_index + buf_size > pes->total_size) {
1348 ret = new_pes_packet(pes, ts->pkt);
1351 pes->total_size = MAX_PES_PAYLOAD;
1352 pes->buffer = av_buffer_alloc(pes->total_size +
1353 AV_INPUT_BUFFER_PADDING_SIZE);
1355 return AVERROR(ENOMEM);
1357 } else if (pes->data_index == 0 &&
1358 buf_size > pes->total_size) {
1359 // pes packet size is < ts size packet and pes data is padded with 0xff
1360 // not sure if this is legal in ts but see issue #2392
1361 buf_size = pes->total_size;
1363 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1364 pes->data_index += buf_size;
1365 /* emit complete packets with known packet size
1366 * decreases demuxer delay for infrequent packets like subtitles from
1367 * a couple of seconds to milliseconds for properly muxed files.
1368 * total_size is the number of bytes following pes_packet_length
1369 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1370 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1371 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1373 ret = new_pes_packet(pes, ts->pkt);
1389 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1394 /* if no pid found, then add a pid context */
1395 pes = av_mallocz(sizeof(PESContext));
1399 pes->stream = ts->stream;
1401 pes->pcr_pid = pcr_pid;
1402 pes->state = MPEGTS_SKIP;
1403 pes->pts = AV_NOPTS_VALUE;
1404 pes->dts = AV_NOPTS_VALUE;
1405 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1414 typedef struct MP4DescrParseContext {
1418 Mp4Descr *active_descr;
1420 int max_descr_count;
1422 int predefined_SLConfigDescriptor_seen;
1423 } MP4DescrParseContext;
1425 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1426 const uint8_t *buf, unsigned size,
1427 Mp4Descr *descr, int max_descr_count)
1430 if (size > (1 << 30))
1431 return AVERROR_INVALIDDATA;
1433 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1434 NULL, NULL, NULL, NULL)) < 0)
1441 d->active_descr = NULL;
1442 d->max_descr_count = max_descr_count;
1447 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1449 int64_t new_off = avio_tell(pb);
1450 (*len) -= new_off - *off;
1454 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1457 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1460 int ret = parse_mp4_descr(d, off, len, 0);
1463 update_offsets(&d->pb, &off, &len);
1468 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1470 avio_rb16(&d->pb); // ID
1476 update_offsets(&d->pb, &off, &len);
1477 return parse_mp4_descr_arr(d, off, len);
1480 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1485 id_flags = avio_rb16(&d->pb);
1486 if (!(id_flags & 0x0020)) { // URL_Flag
1487 update_offsets(&d->pb, &off, &len);
1488 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1494 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1499 if (d->descr_count >= d->max_descr_count)
1500 return AVERROR_INVALIDDATA;
1501 ff_mp4_parse_es_descr(&d->pb, &es_id);
1502 d->active_descr = d->descr + (d->descr_count++);
1504 d->active_descr->es_id = es_id;
1505 update_offsets(&d->pb, &off, &len);
1506 if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1508 update_offsets(&d->pb, &off, &len);
1510 ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1511 d->active_descr = NULL;
1515 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1518 Mp4Descr *descr = d->active_descr;
1520 return AVERROR_INVALIDDATA;
1521 d->active_descr->dec_config_descr = av_malloc(len);
1522 if (!descr->dec_config_descr)
1523 return AVERROR(ENOMEM);
1524 descr->dec_config_descr_len = len;
1525 avio_read(&d->pb, descr->dec_config_descr, len);
1529 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1531 Mp4Descr *descr = d->active_descr;
1534 return AVERROR_INVALIDDATA;
1536 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1537 descr->sl.dst = avio_r8(&d->pb); \
1538 if (descr->sl.dst > maxv) { \
1539 descr->sl.dst = maxv; \
1540 return AVERROR_INVALIDDATA; \
1544 predefined = avio_r8(&d->pb);
1547 int flags = avio_r8(&d->pb);
1548 descr->sl.use_au_start = !!(flags & 0x80);
1549 descr->sl.use_au_end = !!(flags & 0x40);
1550 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1551 descr->sl.use_padding = !!(flags & 0x08);
1552 descr->sl.use_timestamps = !!(flags & 0x04);
1553 descr->sl.use_idle = !!(flags & 0x02);
1554 descr->sl.timestamp_res = avio_rb32(&d->pb);
1556 R8_CHECK_CLIP_MAX(timestamp_len, 63);
1557 R8_CHECK_CLIP_MAX(ocr_len, 63);
1558 R8_CHECK_CLIP_MAX(au_len, 31);
1559 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1560 lengths = avio_rb16(&d->pb);
1561 descr->sl.degr_prior_len = lengths >> 12;
1562 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1563 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1564 } else if (!d->predefined_SLConfigDescriptor_seen){
1565 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1566 d->predefined_SLConfigDescriptor_seen = 1;
1571 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1575 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1578 update_offsets(&d->pb, &off, &len);
1579 if (len < 0 || len1 > len || len1 <= 0) {
1580 av_log(d->s, AV_LOG_ERROR,
1581 "Tag %x length violation new length %d bytes remaining %d\n",
1583 return AVERROR_INVALIDDATA;
1586 if (d->level++ >= MAX_LEVEL) {
1587 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1588 ret = AVERROR_INVALIDDATA;
1592 if (target_tag && tag != target_tag) {
1593 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1595 ret = AVERROR_INVALIDDATA;
1601 ret = parse_MP4IODescrTag(d, off, len1);
1604 ret = parse_MP4ODescrTag(d, off, len1);
1607 ret = parse_MP4ESDescrTag(d, off, len1);
1609 case MP4DecConfigDescrTag:
1610 ret = parse_MP4DecConfigDescrTag(d, off, len1);
1613 ret = parse_MP4SLDescrTag(d, off, len1);
1620 avio_seek(&d->pb, off + len1, SEEK_SET);
1624 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1625 Mp4Descr *descr, int *descr_count, int max_descr_count)
1627 MP4DescrParseContext d;
1630 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1634 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1636 *descr_count = d.descr_count;
1640 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1641 Mp4Descr *descr, int *descr_count, int max_descr_count)
1643 MP4DescrParseContext d;
1646 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1650 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1652 *descr_count = d.descr_count;
1656 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1659 MpegTSContext *ts = filter->u.section_filter.opaque;
1660 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1662 const uint8_t *p, *p_end;
1664 int mp4_descr_count = 0;
1665 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1667 AVFormatContext *s = ts->stream;
1669 p_end = section + section_len - 4;
1671 if (parse_section_header(&h, &p, p_end) < 0)
1673 if (h.tid != M4OD_TID)
1675 if (skip_identical(&h, tssf))
1678 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1679 MAX_MP4_DESCR_COUNT);
1681 for (pid = 0; pid < NB_PID_MAX; pid++) {
1684 for (i = 0; i < mp4_descr_count; i++) {
1687 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1689 if (ts->pids[pid]->type != MPEGTS_PES) {
1690 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1693 pes = ts->pids[pid]->u.pes_filter.opaque;
1698 pes->sl = mp4_descr[i].sl;
1700 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1701 mp4_descr[i].dec_config_descr_len, 0,
1702 NULL, NULL, NULL, NULL);
1703 ff_mp4_read_dec_config_descr(s, st, &pb);
1704 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1705 st->codecpar->extradata_size > 0)
1706 st->need_parsing = 0;
1707 if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1708 st->codecpar->extradata_size > 0)
1709 st->need_parsing = 0;
1711 st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1712 st->internal->need_context_update = 1;
1715 for (i = 0; i < mp4_descr_count; i++)
1716 av_free(mp4_descr[i].dec_config_descr);
1719 static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1722 AVProgram *prg = NULL;
1723 MpegTSContext *ts = filter->u.section_filter.opaque;
1725 int idx = ff_find_stream_index(ts->stream, filter->pid);
1730 * In case we receive an SCTE-35 packet before mpegts context is fully
1736 new_data_packet(section, section_len, ts->pkt);
1737 ts->pkt->stream_index = idx;
1738 prg = av_find_program_from_stream(ts->stream, NULL, idx);
1739 if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1740 MpegTSFilter *f = ts->pids[prg->pcr_pid];
1741 if (f && f->last_pcr != -1)
1742 ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1748 static const uint8_t opus_coupled_stream_cnt[9] = {
1749 1, 0, 1, 1, 2, 2, 2, 3, 3
1752 static const uint8_t opus_stream_cnt[9] = {
1753 1, 1, 1, 2, 2, 3, 4, 4, 5,
1756 static const uint8_t opus_channel_map[8][8] = {
1764 { 0,6,1,2,3,4,5,7 },
1767 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1768 const uint8_t **pp, const uint8_t *desc_list_end,
1769 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1772 const uint8_t *desc_end;
1773 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1777 desc_tag = get8(pp, desc_list_end);
1779 return AVERROR_INVALIDDATA;
1780 desc_len = get8(pp, desc_list_end);
1782 return AVERROR_INVALIDDATA;
1783 desc_end = *pp + desc_len;
1784 if (desc_end > desc_list_end)
1785 return AVERROR_INVALIDDATA;
1787 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1789 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1790 stream_type == STREAM_TYPE_PRIVATE_DATA)
1791 mpegts_find_stream_type(st, desc_tag, DESC_types);
1794 case 0x02: /* video stream descriptor */
1795 if (get8(pp, desc_end) & 0x1) {
1796 st->disposition |= AV_DISPOSITION_STILL_IMAGE;
1799 case 0x1E: /* SL descriptor */
1800 desc_es_id = get16(pp, desc_end);
1803 if (ts && ts->pids[pid])
1804 ts->pids[pid]->es_id = desc_es_id;
1805 for (i = 0; i < mp4_descr_count; i++)
1806 if (mp4_descr[i].dec_config_descr_len &&
1807 mp4_descr[i].es_id == desc_es_id) {
1809 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1810 mp4_descr[i].dec_config_descr_len, 0,
1811 NULL, NULL, NULL, NULL);
1812 ff_mp4_read_dec_config_descr(fc, st, &pb);
1813 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1814 st->codecpar->extradata_size > 0) {
1815 st->need_parsing = 0;
1816 st->internal->need_context_update = 1;
1818 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1819 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1822 case 0x1F: /* FMC descriptor */
1823 if (get16(pp, desc_end) < 0)
1825 if (mp4_descr_count > 0 &&
1826 (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1827 (st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1828 st->request_probe > 0) &&
1829 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1831 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1832 mp4_descr->dec_config_descr_len, 0,
1833 NULL, NULL, NULL, NULL);
1834 ff_mp4_read_dec_config_descr(fc, st, &pb);
1835 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1836 st->codecpar->extradata_size > 0) {
1837 st->request_probe = st->need_parsing = 0;
1838 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1839 st->internal->need_context_update = 1;
1843 case 0x56: /* DVB teletext descriptor */
1845 uint8_t *extradata = NULL;
1846 int language_count = desc_len / 5;
1848 if (desc_len > 0 && desc_len % 5 != 0)
1849 return AVERROR_INVALIDDATA;
1851 if (language_count > 0) {
1852 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1853 av_assert0(language_count <= sizeof(language) / 4);
1855 if (st->codecpar->extradata == NULL) {
1856 if (ff_alloc_extradata(st->codecpar, language_count * 2)) {
1857 return AVERROR(ENOMEM);
1861 if (st->codecpar->extradata_size < language_count * 2)
1862 return AVERROR_INVALIDDATA;
1864 extradata = st->codecpar->extradata;
1866 for (i = 0; i < language_count; i++) {
1867 language[i * 4 + 0] = get8(pp, desc_end);
1868 language[i * 4 + 1] = get8(pp, desc_end);
1869 language[i * 4 + 2] = get8(pp, desc_end);
1870 language[i * 4 + 3] = ',';
1872 memcpy(extradata, *pp, 2);
1878 language[i * 4 - 1] = 0;
1879 av_dict_set(&st->metadata, "language", language, 0);
1880 st->internal->need_context_update = 1;
1884 case 0x59: /* subtitling descriptor */
1886 /* 8 bytes per DVB subtitle substream data:
1887 * ISO_639_language_code (3 bytes),
1888 * subtitling_type (1 byte),
1889 * composition_page_id (2 bytes),
1890 * ancillary_page_id (2 bytes) */
1891 int language_count = desc_len / 8;
1893 if (desc_len > 0 && desc_len % 8 != 0)
1894 return AVERROR_INVALIDDATA;
1896 if (language_count > 1) {
1897 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1900 if (language_count > 0) {
1903 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1904 av_assert0(language_count <= sizeof(language) / 4);
1906 if (st->codecpar->extradata == NULL) {
1907 if (ff_alloc_extradata(st->codecpar, language_count * 5)) {
1908 return AVERROR(ENOMEM);
1912 if (st->codecpar->extradata_size < language_count * 5)
1913 return AVERROR_INVALIDDATA;
1915 extradata = st->codecpar->extradata;
1917 for (i = 0; i < language_count; i++) {
1918 language[i * 4 + 0] = get8(pp, desc_end);
1919 language[i * 4 + 1] = get8(pp, desc_end);
1920 language[i * 4 + 2] = get8(pp, desc_end);
1921 language[i * 4 + 3] = ',';
1923 /* hearing impaired subtitles detection using subtitling_type */
1925 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1926 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1927 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1928 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1929 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1930 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1931 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1935 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1936 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1942 language[i * 4 - 1] = 0;
1943 av_dict_set(&st->metadata, "language", language, 0);
1944 st->internal->need_context_update = 1;
1948 case 0x0a: /* ISO 639 language descriptor */
1949 for (i = 0; i + 4 <= desc_len; i += 4) {
1950 language[i + 0] = get8(pp, desc_end);
1951 language[i + 1] = get8(pp, desc_end);
1952 language[i + 2] = get8(pp, desc_end);
1953 language[i + 3] = ',';
1954 switch (get8(pp, desc_end)) {
1956 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1959 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1962 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1963 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
1967 if (i && language[0]) {
1968 language[i - 1] = 0;
1969 /* don't overwrite language, as it may already have been set by
1970 * another, more specific descriptor (e.g. supplementary audio) */
1971 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
1974 case 0x05: /* registration descriptor */
1975 st->codecpar->codec_tag = bytestream_get_le32(pp);
1976 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1977 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) {
1978 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1979 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1980 st->request_probe = 50;
1983 case 0x52: /* stream identifier descriptor */
1984 st->stream_identifier = 1 + get8(pp, desc_end);
1986 case 0x26: /* metadata descriptor */
1987 if (get16(pp, desc_end) == 0xFFFF)
1989 if (get8(pp, desc_end) == 0xFF) {
1990 st->codecpar->codec_tag = bytestream_get_le32(pp);
1991 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
1992 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
1995 case 0x7f: /* DVB extension descriptor */
1996 ext_desc_tag = get8(pp, desc_end);
1997 if (ext_desc_tag < 0)
1998 return AVERROR_INVALIDDATA;
1999 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
2000 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2001 if (!st->codecpar->extradata) {
2002 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
2003 AV_INPUT_BUFFER_PADDING_SIZE);
2004 if (!st->codecpar->extradata)
2005 return AVERROR(ENOMEM);
2007 st->codecpar->extradata_size = sizeof(opus_default_extradata);
2008 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
2010 channel_config_code = get8(pp, desc_end);
2011 if (channel_config_code < 0)
2012 return AVERROR_INVALIDDATA;
2013 if (channel_config_code <= 0x8) {
2014 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2015 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2016 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2017 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2018 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2020 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2022 st->need_parsing = AVSTREAM_PARSE_FULL;
2023 st->internal->need_context_update = 1;
2026 if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
2030 return AVERROR_INVALIDDATA;
2031 flags = get8(pp, desc_end);
2033 if ((flags & 0x80) == 0) /* mix_type */
2034 st->disposition |= AV_DISPOSITION_DEPENDENT;
2036 switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2038 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2039 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2042 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2045 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2049 if (flags & 0x01) { /* language_code_present */
2051 return AVERROR_INVALIDDATA;
2052 language[0] = get8(pp, desc_end);
2053 language[1] = get8(pp, desc_end);
2054 language[2] = get8(pp, desc_end);
2057 /* This language always has to override a possible
2058 * ISO 639 language descriptor language */
2060 av_dict_set(&st->metadata, "language", language, 0);
2064 case 0x6a: /* ac-3_descriptor */
2066 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2067 if (component_type_flag) {
2068 int component_type = get8(pp, desc_end);
2069 int service_type_mask = 0x38; // 0b00111000
2070 int service_type = ((component_type & service_type_mask) >> 3);
2071 if (service_type == 0x02 /* 0b010 */) {
2072 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2073 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2078 case 0x7a: /* enhanced_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 0xfd: /* ARIB data coding type descriptor */
2093 // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2095 if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2096 // This structure is defined in STD-B10, part 1, listing 5.4 and
2098 // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2099 // Component tag limits are documented in TR-B14, fascicle 2,
2100 // Vol. 3, Section 2, 4.2.8.1
2101 int actual_component_tag = st->stream_identifier - 1;
2102 int picked_profile = FF_PROFILE_UNKNOWN;
2103 int data_component_id = get16(pp, desc_end);
2104 if (data_component_id < 0)
2105 return AVERROR_INVALIDDATA;
2107 switch (data_component_id) {
2109 // [0x30..0x37] are component tags utilized for
2110 // non-mobile captioning service ("profile A").
2111 if (actual_component_tag >= 0x30 &&
2112 actual_component_tag <= 0x37) {
2113 picked_profile = FF_PROFILE_ARIB_PROFILE_A;
2117 // component tag 0x87 signifies a mobile/partial reception
2118 // (1seg) captioning service ("profile C").
2119 if (actual_component_tag == 0x87) {
2120 picked_profile = FF_PROFILE_ARIB_PROFILE_C;
2127 if (picked_profile == FF_PROFILE_UNKNOWN)
2130 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2131 st->codecpar->codec_id = AV_CODEC_ID_ARIB_CAPTION;
2132 st->codecpar->profile = picked_profile;
2133 st->request_probe = 0;
2143 static AVStream *find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid,
2144 int stream_identifier, int pmt_stream_idx)
2146 AVFormatContext *s = ts->stream;
2148 AVStream *found = NULL;
2150 for (i = 0; i < s->nb_streams; i++) {
2151 AVStream *st = s->streams[i];
2152 if (st->program_num != programid)
2154 if (stream_identifier != -1) { /* match based on "stream identifier descriptor" if present */
2155 if (st->stream_identifier == stream_identifier+1) {
2159 } else if (st->pmt_stream_idx == pmt_stream_idx) { /* match based on position within the PMT */
2166 av_log(ts->stream, AV_LOG_VERBOSE,
2167 "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2168 av_get_media_type_string(found->codecpar->codec_type),
2175 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2177 const uint8_t **pp = &p;
2178 const uint8_t *desc_list_end;
2179 const uint8_t *desc_end;
2181 int desc_len, desc_tag;
2183 desc_list_len = get16(pp, p_end);
2184 if (desc_list_len < 0)
2186 desc_list_len &= 0xfff;
2187 desc_list_end = p + desc_list_len;
2188 if (desc_list_end > p_end)
2192 desc_tag = get8(pp, desc_list_end);
2195 desc_len = get8(pp, desc_list_end);
2198 desc_end = *pp + desc_len;
2199 if (desc_end > desc_list_end)
2202 if (desc_tag == 0x52) {
2203 return get8(pp, desc_end);
2211 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2213 return !(stream_type == 0x13 ||
2214 (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
2217 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2219 MpegTSContext *ts = filter->u.section_filter.opaque;
2220 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2221 SectionHeader h1, *h = &h1;
2224 const uint8_t *p, *p_end, *desc_list_end;
2225 int program_info_length, pcr_pid, pid, stream_type;
2227 uint32_t prog_reg_desc = 0; /* registration descriptor */
2228 int stream_identifier = -1;
2230 int mp4_descr_count = 0;
2231 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2234 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2235 hex_dump_debug(ts->stream, section, section_len);
2237 p_end = section + section_len - 4;
2239 if (parse_section_header(h, &p, p_end) < 0)
2241 if (h->tid != PMT_TID)
2243 if (skip_identical(h, tssf))
2246 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2247 h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2249 if (!ts->scan_all_pmts && ts->skip_changes)
2252 if (ts->skip_unknown_pmt && !get_program(ts, h->id))
2254 if (!ts->skip_clear)
2255 clear_program(ts, h->id);
2257 pcr_pid = get16(&p, p_end);
2261 add_pid_to_pmt(ts, h->id, pcr_pid);
2262 update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2264 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2266 program_info_length = get16(&p, p_end);
2267 if (program_info_length < 0)
2269 program_info_length &= 0xfff;
2270 while (program_info_length >= 2) {
2272 tag = get8(&p, p_end);
2273 len = get8(&p, p_end);
2275 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2277 if (len > program_info_length - 2)
2278 // something else is broken, exit the program_descriptors_loop
2280 program_info_length -= len + 2;
2281 if (tag == 0x1d) { // IOD descriptor
2282 get8(&p, p_end); // scope
2283 get8(&p, p_end); // label
2285 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2286 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2287 } else if (tag == 0x05 && len >= 4) { // registration descriptor
2288 prog_reg_desc = bytestream_get_le32(&p);
2293 p += program_info_length;
2297 // stop parsing after pmt, we found header
2298 if (!ts->stream->nb_streams)
2301 set_pmt_found(ts, h->id);
2304 for (i = 0; ; i++) {
2307 stream_type = get8(&p, p_end);
2308 if (stream_type < 0)
2310 pid = get16(&p, p_end);
2314 if (pid == ts->current_pid)
2317 if (ts->merge_pmt_versions)
2318 stream_identifier = parse_stream_identifier_desc(p, p_end);
2320 /* now create stream */
2321 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2322 pes = ts->pids[pid]->u.pes_filter.opaque;
2323 if (ts->merge_pmt_versions && !pes->st) {
2324 st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2327 pes->stream_type = stream_type;
2332 pes->st = avformat_new_stream(pes->stream, NULL);
2335 pes->st->id = pes->pid;
2336 pes->st->program_num = h->id;
2337 pes->st->pmt_version = h->version;
2338 pes->st->pmt_stream_idx = i;
2341 } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2343 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2344 pes = add_pes_stream(ts, pid, pcr_pid);
2345 if (ts->merge_pmt_versions && pes && !pes->st) {
2346 st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2349 pes->stream_type = stream_type;
2353 if (pes && !pes->st) {
2354 st = avformat_new_stream(pes->stream, NULL);
2358 st->program_num = h->id;
2359 st->pmt_version = h->version;
2360 st->pmt_stream_idx = i;
2363 int idx = ff_find_stream_index(ts->stream, pid);
2365 st = ts->stream->streams[idx];
2367 if (ts->merge_pmt_versions && !st) {
2368 st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2371 st = avformat_new_stream(ts->stream, NULL);
2375 st->program_num = h->id;
2376 st->pmt_version = h->version;
2377 st->pmt_stream_idx = i;
2378 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2379 if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2380 mpegts_find_stream_type(st, stream_type, SCTE_types);
2381 mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2389 if (pes && !pes->stream_type)
2390 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2392 add_pid_to_pmt(ts, h->id, pid);
2394 av_program_add_stream_index(ts->stream, h->id, st->index);
2396 desc_list_len = get16(&p, p_end);
2397 if (desc_list_len < 0)
2399 desc_list_len &= 0xfff;
2400 desc_list_end = p + desc_list_len;
2401 if (desc_list_end > p_end)
2404 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2405 desc_list_end, mp4_descr,
2406 mp4_descr_count, pid, ts) < 0)
2409 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2410 stream_type == 0x83 && pes->sub_st) {
2411 av_program_add_stream_index(ts->stream, h->id,
2412 pes->sub_st->index);
2413 pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2419 if (!ts->pids[pcr_pid])
2420 mpegts_open_pcr_filter(ts, pcr_pid);
2423 for (i = 0; i < mp4_descr_count; i++)
2424 av_free(mp4_descr[i].dec_config_descr);
2427 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2429 MpegTSContext *ts = filter->u.section_filter.opaque;
2430 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2431 SectionHeader h1, *h = &h1;
2432 const uint8_t *p, *p_end;
2436 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2437 hex_dump_debug(ts->stream, section, section_len);
2439 p_end = section + section_len - 4;
2441 if (parse_section_header(h, &p, p_end) < 0)
2443 if (h->tid != PAT_TID)
2445 if (ts->skip_changes)
2448 if (skip_identical(h, tssf))
2450 ts->stream->ts_id = h->id;
2454 sid = get16(&p, p_end);
2457 pmt_pid = get16(&p, p_end);
2462 if (pmt_pid == ts->current_pid)
2465 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2467 if (sid == 0x0000) {
2470 MpegTSFilter *fil = ts->pids[pmt_pid];
2471 program = av_new_program(ts->stream, sid);
2473 program->program_num = sid;
2474 program->pmt_pid = pmt_pid;
2477 if ( fil->type != MPEGTS_SECTION
2478 || fil->pid != pmt_pid
2479 || fil->u.section_filter.section_cb != pmt_cb)
2480 mpegts_close_filter(ts, ts->pids[pmt_pid]);
2482 if (!ts->pids[pmt_pid])
2483 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2484 add_pat_entry(ts, sid);
2485 add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2486 add_pid_to_pmt(ts, sid, pmt_pid);
2492 for (j=0; j<ts->stream->nb_programs; j++) {
2493 for (i = 0; i < ts->nb_prg; i++)
2494 if (ts->prg[i].id == ts->stream->programs[j]->id)
2496 if (i==ts->nb_prg && !ts->skip_clear)
2497 clear_avprogram(ts, ts->stream->programs[j]->id);
2502 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2504 MpegTSContext *ts = filter->u.section_filter.opaque;
2505 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2506 SectionHeader h1, *h = &h1;
2507 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2508 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2509 char *name, *provider_name;
2511 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2512 hex_dump_debug(ts->stream, section, section_len);
2514 p_end = section + section_len - 4;
2516 if (parse_section_header(h, &p, p_end) < 0)
2518 if (h->tid != SDT_TID)
2520 if (ts->skip_changes)
2522 if (skip_identical(h, tssf))
2525 onid = get16(&p, p_end);
2528 val = get8(&p, p_end);
2532 sid = get16(&p, p_end);
2535 val = get8(&p, p_end);
2538 desc_list_len = get16(&p, p_end);
2539 if (desc_list_len < 0)
2541 desc_list_len &= 0xfff;
2542 desc_list_end = p + desc_list_len;
2543 if (desc_list_end > p_end)
2546 desc_tag = get8(&p, desc_list_end);
2549 desc_len = get8(&p, desc_list_end);
2550 desc_end = p + desc_len;
2551 if (desc_len < 0 || desc_end > desc_list_end)
2554 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2555 desc_tag, desc_len);
2559 service_type = get8(&p, p_end);
2560 if (service_type < 0)
2562 provider_name = getstr8(&p, p_end);
2565 name = getstr8(&p, p_end);
2567 AVProgram *program = av_new_program(ts->stream, sid);
2569 av_dict_set(&program->metadata, "service_name", name, 0);
2570 av_dict_set(&program->metadata, "service_provider",
2575 av_free(provider_name);
2586 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2587 const uint8_t *packet);
2589 /* handle one TS packet */
2590 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2593 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2594 has_adaptation, has_payload;
2595 const uint8_t *p, *p_end;
2598 pid = AV_RB16(packet + 1) & 0x1fff;
2599 is_start = packet[1] & 0x40;
2600 tss = ts->pids[pid];
2601 if (ts->auto_guess && !tss && is_start) {
2602 add_pes_stream(ts, pid, -1);
2603 tss = ts->pids[pid];
2608 tss->discard = discard_pid(ts, pid);
2611 ts->current_pid = pid;
2613 afc = (packet[3] >> 4) & 3;
2614 if (afc == 0) /* reserved value */
2616 has_adaptation = afc & 2;
2617 has_payload = afc & 1;
2618 is_discontinuity = has_adaptation &&
2619 packet[4] != 0 && /* with length > 0 */
2620 (packet[5] & 0x80); /* and discontinuity indicated */
2622 /* continuity check (currently not used) */
2623 cc = (packet[3] & 0xf);
2624 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2625 cc_ok = pid == 0x1FFF || // null packet PID
2632 av_log(ts->stream, AV_LOG_DEBUG,
2633 "Continuity check failed for pid %d expected %d got %d\n",
2634 pid, expected_cc, cc);
2635 if (tss->type == MPEGTS_PES) {
2636 PESContext *pc = tss->u.pes_filter.opaque;
2637 pc->flags |= AV_PKT_FLAG_CORRUPT;
2641 if (packet[1] & 0x80) {
2642 av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2643 if (tss->type == MPEGTS_PES) {
2644 PESContext *pc = tss->u.pes_filter.opaque;
2645 pc->flags |= AV_PKT_FLAG_CORRUPT;
2650 if (has_adaptation) {
2653 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2654 tss->last_pcr = pcr_h * 300 + pcr_l;
2655 /* skip adaptation field */
2658 /* if past the end of packet, ignore */
2659 p_end = packet + TS_PACKET_SIZE;
2660 if (p >= p_end || !has_payload)
2663 pos = avio_tell(ts->stream->pb);
2665 av_assert0(pos >= TS_PACKET_SIZE);
2666 ts->pos47_full = pos - TS_PACKET_SIZE;
2669 if (tss->type == MPEGTS_SECTION) {
2671 /* pointer field present */
2673 if (len > p_end - p)
2676 /* write remaining section bytes */
2677 write_section_data(ts, tss,
2679 /* check whether filter has been closed */
2685 write_section_data(ts, tss,
2690 write_section_data(ts, tss,
2695 // stop find_stream_info from waiting for more streams
2696 // when all programs have received a PMT
2697 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2699 for (i = 0; i < ts->nb_prg; i++) {
2700 if (!ts->prg[i].pmt_found)
2703 if (i == ts->nb_prg && ts->nb_prg > 0) {
2705 for (i = 0; i < ts->stream->nb_streams; i++) {
2706 AVStream *st = ts->stream->streams[i];
2707 if (st->codecpar->codec_type >= 0)
2708 types |= 1<<st->codecpar->codec_type;
2710 if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2711 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2712 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2719 // Note: The position here points actually behind the current packet.
2720 if (tss->type == MPEGTS_PES) {
2721 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2722 pos - ts->raw_packet_size)) < 0)
2730 static void reanalyze(MpegTSContext *ts) {
2731 AVIOContext *pb = ts->stream->pb;
2732 int64_t pos = avio_tell(pb);
2735 pos -= ts->pos47_full;
2736 if (pos == TS_PACKET_SIZE) {
2737 ts->size_stat[0] ++;
2738 } else if (pos == TS_DVHS_PACKET_SIZE) {
2739 ts->size_stat[1] ++;
2740 } else if (pos == TS_FEC_PACKET_SIZE) {
2741 ts->size_stat[2] ++;
2744 ts->size_stat_count ++;
2745 if (ts->size_stat_count > SIZE_STAT_THRESHOLD) {
2747 if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2748 newsize = TS_PACKET_SIZE;
2749 } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2750 newsize = TS_DVHS_PACKET_SIZE;
2751 } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2752 newsize = TS_FEC_PACKET_SIZE;
2754 if (newsize && newsize != ts->raw_packet_size) {
2755 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2756 ts->raw_packet_size = newsize;
2758 ts->size_stat_count = 0;
2759 memset(ts->size_stat, 0, sizeof(ts->size_stat));
2763 /* XXX: try to find a better synchro over several packets (use
2764 * get_packet_size() ?) */
2765 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2767 MpegTSContext *ts = s->priv_data;
2768 AVIOContext *pb = s->pb;
2770 uint64_t pos = avio_tell(pb);
2772 avio_seek(pb, -FFMIN(seekback, pos), SEEK_CUR);
2774 //Special case for files like 01c56b0dc1.ts
2775 if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2776 avio_seek(pb, 12, SEEK_CUR);
2780 for (i = 0; i < ts->resync_size; i++) {
2785 avio_seek(pb, -1, SEEK_CUR);
2786 reanalyze(s->priv_data);
2790 av_log(s, AV_LOG_ERROR,
2791 "max resync size reached, could not find sync byte\n");
2793 return AVERROR_INVALIDDATA;
2796 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2797 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2798 const uint8_t **data)
2800 AVIOContext *pb = s->pb;
2804 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2805 if (len != TS_PACKET_SIZE)
2806 return len < 0 ? len : AVERROR_EOF;
2807 /* check packet sync byte */
2808 if ((*data)[0] != 0x47) {
2809 /* find a new packet start */
2811 if (mpegts_resync(s, raw_packet_size, *data) < 0)
2812 return AVERROR(EAGAIN);
2822 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2824 AVIOContext *pb = s->pb;
2825 int skip = raw_packet_size - TS_PACKET_SIZE;
2827 avio_skip(pb, skip);
2830 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2832 AVFormatContext *s = ts->stream;
2833 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2834 const uint8_t *data;
2838 if (avio_tell(s->pb) != ts->last_pos) {
2840 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2841 /* seek detected, flush pes buffer */
2842 for (i = 0; i < NB_PID_MAX; i++) {
2844 if (ts->pids[i]->type == MPEGTS_PES) {
2845 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2846 av_buffer_unref(&pes->buffer);
2847 pes->data_index = 0;
2848 pes->state = MPEGTS_SKIP; /* skip until pes header */
2849 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2850 ts->pids[i]->u.section_filter.last_ver = -1;
2852 ts->pids[i]->last_cc = -1;
2853 ts->pids[i]->last_pcr = -1;
2860 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2863 if (nb_packets != 0 && packet_num >= nb_packets ||
2864 ts->stop_parse > 1) {
2865 ret = AVERROR(EAGAIN);
2868 if (ts->stop_parse > 0)
2871 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2874 ret = handle_packet(ts, data);
2875 finished_reading_packet(s, ts->raw_packet_size);
2879 ts->last_pos = avio_tell(s->pb);
2883 static int mpegts_probe(const AVProbeData *p)
2885 const int size = p->buf_size;
2889 int check_count = size / TS_FEC_PACKET_SIZE;
2890 #define CHECK_COUNT 10
2891 #define CHECK_BLOCK 100
2896 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2897 int left = FFMIN(check_count - i, CHECK_BLOCK);
2898 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2899 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2900 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2901 score = FFMAX3(score, dvhs_score, fec_score);
2903 maxscore = FFMAX(maxscore, score);
2906 sumscore = sumscore * CHECK_COUNT / check_count;
2907 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2909 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2911 if (check_count > CHECK_COUNT && sumscore > 6) {
2912 return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2913 } else if (check_count >= CHECK_COUNT && sumscore > 6) {
2914 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2915 } else if (check_count >= CHECK_COUNT && maxscore > 6) {
2916 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2917 } else if (sumscore > 6) {
2924 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2925 * (-1) if not available */
2926 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2928 int afc, len, flags;
2932 afc = (packet[3] >> 4) & 3;
2934 return AVERROR_INVALIDDATA;
2939 return AVERROR_INVALIDDATA;
2942 if (!(flags & 0x10))
2943 return AVERROR_INVALIDDATA;
2945 return AVERROR_INVALIDDATA;
2947 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2948 *ppcr_low = ((p[4] & 1) << 8) | p[5];
2952 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2954 /* NOTE: We attempt to seek on non-seekable files as well, as the
2955 * probe buffer usually is big enough. Only warn if the seek failed
2956 * on files where the seek should work. */
2957 if (avio_seek(pb, pos, SEEK_SET) < 0)
2958 av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2961 static int mpegts_read_header(AVFormatContext *s)
2963 MpegTSContext *ts = s->priv_data;
2964 AVIOContext *pb = s->pb;
2965 int64_t pos, probesize = s->probesize;
2967 s->internal->prefer_codec_framerate = 1;
2969 if (ffio_ensure_seekback(pb, probesize) < 0)
2970 av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2972 pos = avio_tell(pb);
2973 ts->raw_packet_size = get_packet_size(s);
2974 if (ts->raw_packet_size <= 0) {
2975 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2976 ts->raw_packet_size = TS_PACKET_SIZE;
2981 if (s->iformat == &ff_mpegts_demuxer) {
2984 /* first do a scan to get all the services */
2985 seek_back(s, pb, pos);
2987 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2989 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2991 handle_packets(ts, probesize / ts->raw_packet_size);
2992 /* if could not find service, enable auto_guess */
2996 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2998 s->ctx_flags |= AVFMTCTX_NOHEADER;
3001 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
3002 int64_t pcrs[2], pcr_h;
3003 int packet_count[2];
3004 uint8_t packet[TS_PACKET_SIZE];
3005 const uint8_t *data;
3007 /* only read packets */
3009 st = avformat_new_stream(s, NULL);
3011 return AVERROR(ENOMEM);
3012 avpriv_set_pts_info(st, 60, 1, 27000000);
3013 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
3014 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
3016 /* we iterate until we find two PCRs to estimate the bitrate */
3021 ret = read_packet(s, packet, ts->raw_packet_size, &data);
3024 pid = AV_RB16(data + 1) & 0x1fff;
3025 if ((pcr_pid == -1 || pcr_pid == pid) &&
3026 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
3027 finished_reading_packet(s, ts->raw_packet_size);
3029 packet_count[nb_pcrs] = nb_packets;
3030 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
3033 if (pcrs[1] - pcrs[0] > 0) {
3034 /* the difference needs to be positive to make sense for bitrate computation */
3037 av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
3039 packet_count[0] = packet_count[1];
3044 finished_reading_packet(s, ts->raw_packet_size);
3049 /* NOTE1: the bitrate is computed without the FEC */
3050 /* NOTE2: it is only the bitrate of the start of the stream */
3051 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
3052 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
3053 s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
3054 st->codecpar->bit_rate = s->bit_rate;
3055 st->start_time = ts->cur_pcr;
3056 av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
3057 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
3060 seek_back(s, pb, pos);
3064 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
3066 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
3068 MpegTSContext *ts = s->priv_data;
3070 int64_t pcr_h, next_pcr_h, pos;
3071 int pcr_l, next_pcr_l;
3072 uint8_t pcr_buf[12];
3073 const uint8_t *data;
3075 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
3076 return AVERROR(ENOMEM);
3077 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
3078 pkt->pos = avio_tell(s->pb);
3080 av_packet_unref(pkt);
3083 if (data != pkt->data)
3084 memcpy(pkt->data, data, ts->raw_packet_size);
3085 finished_reading_packet(s, ts->raw_packet_size);
3086 if (ts->mpeg2ts_compute_pcr) {
3087 /* compute exact PCR for each packet */
3088 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
3089 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
3090 pos = avio_tell(s->pb);
3091 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
3092 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
3093 avio_read(s->pb, pcr_buf, 12);
3094 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
3095 /* XXX: not precise enough */
3097 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
3102 avio_seek(s->pb, pos, SEEK_SET);
3103 /* no next PCR found: we use previous increment */
3104 ts->cur_pcr = pcr_h * 300 + pcr_l;
3106 pkt->pts = ts->cur_pcr;
3107 pkt->duration = ts->pcr_incr;
3108 ts->cur_pcr += ts->pcr_incr;
3110 pkt->stream_index = 0;
3114 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
3116 MpegTSContext *ts = s->priv_data;
3121 ret = handle_packets(ts, 0);
3123 av_packet_unref(ts->pkt);
3124 /* flush pes data left */
3125 for (i = 0; i < NB_PID_MAX; i++)
3126 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
3127 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3128 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
3129 ret = new_pes_packet(pes, pkt);
3132 pes->state = MPEGTS_SKIP;
3139 if (!ret && pkt->size < 0)
3140 ret = AVERROR_INVALIDDATA;
3144 static void mpegts_free(MpegTSContext *ts)
3150 for (i = 0; i < NB_PID_MAX; i++)
3152 mpegts_close_filter(ts, ts->pids[i]);
3155 static int mpegts_read_close(AVFormatContext *s)
3157 MpegTSContext *ts = s->priv_data;
3162 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3163 int64_t *ppos, int64_t pos_limit)
3165 MpegTSContext *ts = s->priv_data;
3166 int64_t pos, timestamp;
3167 uint8_t buf[TS_PACKET_SIZE];
3168 int pcr_l, pcr_pid =
3169 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3170 int pos47 = ts->pos47_full % ts->raw_packet_size;
3172 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3173 ts->raw_packet_size + pos47;
3174 while(pos < pos_limit) {
3175 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3176 return AV_NOPTS_VALUE;
3177 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3178 return AV_NOPTS_VALUE;
3179 if (buf[0] != 0x47) {
3180 if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3181 return AV_NOPTS_VALUE;
3182 pos = avio_tell(s->pb);
3185 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3186 parse_pcr(×tamp, &pcr_l, buf) == 0) {
3190 pos += ts->raw_packet_size;
3193 return AV_NOPTS_VALUE;
3196 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3197 int64_t *ppos, int64_t pos_limit)
3199 MpegTSContext *ts = s->priv_data;
3201 int pos47 = ts->pos47_full % ts->raw_packet_size;
3202 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3203 ff_read_frame_flush(s);
3204 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3205 return AV_NOPTS_VALUE;
3206 while(pos < pos_limit) {
3209 av_init_packet(&pkt);
3210 ret = av_read_frame(s, &pkt);
3212 return AV_NOPTS_VALUE;
3213 if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
3214 ff_reduce_index(s, pkt.stream_index);
3215 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3216 if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
3217 int64_t dts = pkt.dts;
3219 av_packet_unref(&pkt);
3224 av_packet_unref(&pkt);
3227 return AV_NOPTS_VALUE;
3230 /**************************************************************/
3231 /* parsing functions - called from other demuxers such as RTP */
3233 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
3237 ts = av_mallocz(sizeof(MpegTSContext));
3240 /* no stream case, currently used by RTP */
3241 ts->raw_packet_size = TS_PACKET_SIZE;
3244 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3245 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3250 /* return the consumed length if a packet was output, or -1 if no
3251 * packet is output */
3252 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
3253 const uint8_t *buf, int len)
3261 if (len < TS_PACKET_SIZE)
3262 return AVERROR_INVALIDDATA;
3263 if (buf[0] != 0x47) {
3267 handle_packet(ts, buf);
3268 buf += TS_PACKET_SIZE;
3269 len -= TS_PACKET_SIZE;
3270 if (ts->stop_parse == 1)
3277 void avpriv_mpegts_parse_close(MpegTSContext *ts)
3283 AVInputFormat ff_mpegts_demuxer = {
3285 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3286 .priv_data_size = sizeof(MpegTSContext),
3287 .read_probe = mpegts_probe,
3288 .read_header = mpegts_read_header,
3289 .read_packet = mpegts_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 = &mpegts_class,
3296 AVInputFormat ff_mpegtsraw_demuxer = {
3297 .name = "mpegtsraw",
3298 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3299 .priv_data_size = sizeof(MpegTSContext),
3300 .read_header = mpegts_read_header,
3301 .read_packet = mpegts_raw_read_packet,
3302 .read_close = mpegts_read_close,
3303 .read_timestamp = mpegts_get_dts,
3304 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3305 .priv_class = &mpegtsraw_class,