2 * MPEG-2 transport stream (aka DVB) demuxer
3 * Copyright (c) 2002-2003 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/buffer.h"
23 #include "libavutil/crc.h"
24 #include "libavutil/internal.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/log.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/mathematics.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/dovi_meta.h"
32 #include "libavcodec/bytestream.h"
33 #include "libavcodec/get_bits.h"
34 #include "libavcodec/opus.h"
38 #include "avio_internal.h"
45 /* maximum size in which we look for synchronization if
46 * synchronization is lost */
47 #define MAX_RESYNC_SIZE 65536
49 #define MAX_PES_PAYLOAD 200 * 1024
51 #define MAX_MP4_DESCR_COUNT 16
53 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
55 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
56 (modulus) = (dividend) % (divisor); \
57 (prev_dividend) = (dividend); \
60 #define PROBE_PACKET_MAX_BUF 8192
61 #define PROBE_PACKET_MARGIN 5
63 enum MpegTSFilterType {
69 typedef struct MpegTSFilter MpegTSFilter;
71 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
72 int is_start, int64_t pos);
74 typedef struct MpegTSPESFilter {
79 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
81 typedef void SetServiceCallback (void *opaque, int ret);
83 typedef struct MpegTSSectionFilter {
90 unsigned int check_crc : 1;
91 unsigned int end_of_section_reached : 1;
92 SectionCallback *section_cb;
94 } MpegTSSectionFilter;
99 int last_cc; /* last cc code (-1 if first packet) */
102 enum MpegTSFilterType type;
104 MpegTSPESFilter pes_filter;
105 MpegTSSectionFilter section_filter;
109 #define MAX_PIDS_PER_PROGRAM 64
111 unsigned int id; // program id/service id
112 unsigned int nb_pids;
113 unsigned int pids[MAX_PIDS_PER_PROGRAM];
115 /** have we found pmt for this program */
119 struct MpegTSContext {
120 const AVClass *class;
122 AVFormatContext *stream;
123 /** raw packet size, including FEC if present */
128 /** if true, all pids are analyzed to find streams */
131 /** compute exact PCR for each transport stream packet */
132 int mpeg2ts_compute_pcr;
134 /** fix dvb teletext pts */
135 int fix_teletext_pts;
137 int64_t cur_pcr; /**< used to estimate the exact PCR */
138 int64_t pcr_incr; /**< used to estimate the exact PCR */
140 /* data needed to handle file based ts */
141 /** stop parsing loop */
143 /** packet containing Audio/Video data */
145 /** to detect seek */
150 int skip_unknown_pmt;
155 int merge_pmt_versions;
157 /******************************************/
158 /* private mpegts data */
160 /** structure to keep track of Program->pids mapping */
164 int8_t crc_validity[NB_PID_MAX];
165 /** filters for various streams specified by PMT + for the PAT and PMT */
166 MpegTSFilter *pids[NB_PID_MAX];
169 AVStream *epg_stream;
170 AVBufferPool* pools[32];
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(struct Program *p)
296 static void clear_programs(MpegTSContext *ts)
302 static struct Program * add_program(MpegTSContext *ts, unsigned int programid)
305 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
309 p = &ts->prg[ts->nb_prg];
316 static void add_pid_to_program(struct Program *p, unsigned int pid)
322 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
325 for (i = 0; i < p->nb_pids; i++)
326 if (p->pids[i] == pid)
329 p->pids[p->nb_pids++] = pid;
332 static void update_av_program_info(AVFormatContext *s, unsigned int programid,
333 unsigned int pid, int version)
336 for (i = 0; i < s->nb_programs; i++) {
337 AVProgram *program = s->programs[i];
338 if (program->id == programid) {
339 int old_pcr_pid = program->pcr_pid,
340 old_version = program->pmt_version;
341 program->pcr_pid = pid;
342 program->pmt_version = version;
344 if (old_version != -1 && old_version != version) {
345 av_log(s, AV_LOG_VERBOSE,
346 "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
347 programid, old_version, version, old_pcr_pid, pid);
355 * @brief discard_pid() decides if the pid is to be discarded according
356 * to caller's programs selection
357 * @param ts : - TS context
359 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
362 static int discard_pid(MpegTSContext *ts, unsigned int pid)
365 int used = 0, discarded = 0;
371 /* If none of the programs have .discard=AVDISCARD_ALL then there's
372 * no way we have to discard this packet */
373 for (k = 0; k < ts->stream->nb_programs; k++)
374 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
376 if (k == ts->stream->nb_programs)
379 for (i = 0; i < ts->nb_prg; i++) {
381 for (j = 0; j < p->nb_pids; j++) {
382 if (p->pids[j] != pid)
384 // is program with id p->id set to be discarded?
385 for (k = 0; k < ts->stream->nb_programs; k++) {
386 if (ts->stream->programs[k]->id == p->id) {
387 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
396 return !used && discarded;
400 * Assemble PES packets out of TS packets, and then call the "section_cb"
401 * function when they are complete.
403 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
404 const uint8_t *buf, int buf_size, int is_start)
406 MpegTSSectionFilter *tss = &tss1->u.section_filter;
407 uint8_t *cur_section_buf = NULL;
411 memcpy(tss->section_buf, buf, buf_size);
412 tss->section_index = buf_size;
413 tss->section_h_size = -1;
414 tss->end_of_section_reached = 0;
416 if (tss->end_of_section_reached)
418 len = MAX_SECTION_SIZE - tss->section_index;
421 memcpy(tss->section_buf + tss->section_index, buf, len);
422 tss->section_index += len;
426 cur_section_buf = tss->section_buf;
427 while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
428 /* compute section length if possible */
429 if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
430 len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
431 if (len > MAX_SECTION_SIZE)
433 tss->section_h_size = len;
436 if (tss->section_h_size != -1 &&
437 tss->section_index >= offset + tss->section_h_size) {
439 tss->end_of_section_reached = 1;
441 if (tss->check_crc) {
442 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
443 if (tss->section_h_size >= 4)
444 tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
447 ts->crc_validity[ tss1->pid ] = 100;
448 }else if (ts->crc_validity[ tss1->pid ] > -10) {
449 ts->crc_validity[ tss1->pid ]--;
454 tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
459 cur_section_buf += tss->section_h_size;
460 offset += tss->section_h_size;
461 tss->section_h_size = -1;
463 tss->section_h_size = -1;
464 tss->end_of_section_reached = 0;
470 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
471 enum MpegTSFilterType type)
473 MpegTSFilter *filter;
475 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
477 if (pid >= NB_PID_MAX || ts->pids[pid])
479 filter = av_mallocz(sizeof(MpegTSFilter));
482 ts->pids[pid] = filter;
487 filter->last_cc = -1;
488 filter->last_pcr= -1;
493 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
495 SectionCallback *section_cb,
499 MpegTSFilter *filter;
500 MpegTSSectionFilter *sec;
501 uint8_t *section_buf = av_mallocz(MAX_SECTION_SIZE);
506 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION))) {
507 av_free(section_buf);
510 sec = &filter->u.section_filter;
511 sec->section_cb = section_cb;
512 sec->opaque = opaque;
513 sec->section_buf = section_buf;
514 sec->check_crc = check_crc;
520 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
524 MpegTSFilter *filter;
525 MpegTSPESFilter *pes;
527 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
530 pes = &filter->u.pes_filter;
531 pes->pes_cb = pes_cb;
532 pes->opaque = opaque;
536 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
538 return mpegts_open_filter(ts, pid, MPEGTS_PCR);
541 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
546 if (filter->type == MPEGTS_SECTION)
547 av_freep(&filter->u.section_filter.section_buf);
548 else if (filter->type == MPEGTS_PES) {
549 PESContext *pes = filter->u.pes_filter.opaque;
550 av_buffer_unref(&pes->buffer);
551 /* referenced private data will be freed later in
552 * avformat_close_input (pes->st->priv_data == pes) */
553 if (!pes->st || pes->merged_st) {
554 av_freep(&filter->u.pes_filter.opaque);
559 ts->pids[pid] = NULL;
562 static int analyze(const uint8_t *buf, int size, int packet_size,
565 int stat[TS_MAX_PACKET_SIZE];
570 memset(stat, 0, packet_size * sizeof(*stat));
572 for (i = 0; i < size - 3; i++) {
573 if (buf[i] == 0x47) {
574 int pid = AV_RB16(buf+1) & 0x1FFF;
575 int asc = buf[i + 3] & 0x30;
576 if (!probe || pid == 0x1FFF || asc) {
577 int x = i % packet_size;
580 if (stat[x] > best_score) {
581 best_score = stat[x];
587 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
590 /* autodetect fec presence */
591 static int get_packet_size(AVFormatContext* s)
593 int score, fec_score, dvhs_score;
597 /*init buffer to store stream for probing */
598 uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
600 int max_iterations = 16;
602 while (buf_size < PROBE_PACKET_MAX_BUF && max_iterations--) {
603 ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
605 return AVERROR_INVALIDDATA;
608 score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
609 dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
610 fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
611 av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
612 buf_size, score, dvhs_score, fec_score);
614 margin = mid_pred(score, fec_score, dvhs_score);
616 if (buf_size < PROBE_PACKET_MAX_BUF)
617 margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
620 return TS_PACKET_SIZE;
621 else if (dvhs_score > margin)
622 return TS_DVHS_PACKET_SIZE;
623 else if (fec_score > margin)
624 return TS_FEC_PACKET_SIZE;
626 return AVERROR_INVALIDDATA;
629 typedef struct SectionHeader {
634 uint8_t last_sec_num;
637 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
639 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
642 tssf->last_ver = h->version;
643 tssf->last_crc = tssf->crc;
648 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
655 return AVERROR_INVALIDDATA;
661 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
668 return AVERROR_INVALIDDATA;
675 /* read and allocate a DVB string preceded by its length */
676 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
683 len = get8(&p, p_end);
690 const char *encodings[] = {
691 "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
692 "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
693 "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
694 "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
695 "", "", "", "", "", "", "", ""
699 size_t inlen = len, outlen = inlen * 6 + 1;
700 if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
702 snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
705 cd = iconv_open("UTF-8", iso8859);
706 } else if (p[0] < 0x20) {
709 cd = iconv_open("UTF-8", encodings[*p]);
712 cd = iconv_open("UTF-8", encodings[0]);
714 if (cd == (iconv_t)-1)
716 str = out = av_malloc(outlen);
721 if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
733 str = av_malloc(len + 1);
743 static int parse_section_header(SectionHeader *h,
744 const uint8_t **pp, const uint8_t *p_end)
748 val = get8(pp, p_end);
753 val = get16(pp, p_end);
757 val = get8(pp, p_end);
760 h->version = (val >> 1) & 0x1f;
761 val = get8(pp, p_end);
765 val = get8(pp, p_end);
768 h->last_sec_num = val;
772 typedef struct StreamType {
773 uint32_t stream_type;
774 enum AVMediaType codec_type;
775 enum AVCodecID codec_id;
778 static const StreamType ISO_types[] = {
779 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
780 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
781 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
782 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
783 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
784 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
785 /* Makito encoder sets stream type 0x11 for AAC,
786 * so auto-detect LOAS/LATM instead of hardcoding it. */
787 #if !CONFIG_LOAS_DEMUXER
788 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
790 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
791 { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
792 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
793 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
794 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
795 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
796 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
797 { 0xd2, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS2 },
798 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
802 static const StreamType HDMV_types[] = {
803 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
804 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
805 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
806 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
807 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
808 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
809 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
810 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
811 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
812 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
813 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
818 static const StreamType SCTE_types[] = {
819 { 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
824 static const StreamType MISC_types[] = {
825 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
826 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
830 static const StreamType REGD_types[] = {
831 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
832 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
833 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
834 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
835 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
836 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
837 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
838 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
839 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
840 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
841 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
842 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
846 static const StreamType METADATA_types[] = {
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 },
852 /* descriptor present */
853 static const StreamType DESC_types[] = {
854 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
855 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
856 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
857 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
858 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
862 static void mpegts_find_stream_type(AVStream *st,
863 uint32_t stream_type,
864 const StreamType *types)
866 for (; types->stream_type; types++)
867 if (stream_type == types->stream_type) {
868 if (st->codecpar->codec_type != types->codec_type ||
869 st->codecpar->codec_id != types->codec_id) {
870 st->codecpar->codec_type = types->codec_type;
871 st->codecpar->codec_id = types->codec_id;
872 st->internal->need_context_update = 1;
874 st->internal->request_probe = 0;
879 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
880 uint32_t stream_type, uint32_t prog_reg_desc)
882 int old_codec_type = st->codecpar->codec_type;
883 int old_codec_id = st->codecpar->codec_id;
884 int old_codec_tag = st->codecpar->codec_tag;
886 if (avcodec_is_open(st->internal->avctx)) {
887 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
891 avpriv_set_pts_info(st, 33, 1, 90000);
893 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
894 st->codecpar->codec_id = AV_CODEC_ID_NONE;
895 st->need_parsing = AVSTREAM_PARSE_FULL;
897 pes->stream_type = stream_type;
899 av_log(pes->stream, AV_LOG_DEBUG,
900 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
901 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
903 st->codecpar->codec_tag = pes->stream_type;
905 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
906 if (pes->stream_type == 4 || pes->stream_type == 0x0f)
907 st->internal->request_probe = 50;
908 if ((prog_reg_desc == AV_RL32("HDMV") ||
909 prog_reg_desc == AV_RL32("HDPR")) &&
910 st->codecpar->codec_id == AV_CODEC_ID_NONE) {
911 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
912 if (pes->stream_type == 0x83) {
913 // HDMV TrueHD streams also contain an AC3 coded version of the
914 // audio track - add a second stream for this
916 // priv_data cannot be shared between streams
917 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
919 return AVERROR(ENOMEM);
920 memcpy(sub_pes, pes, sizeof(*sub_pes));
922 sub_st = avformat_new_stream(pes->stream, NULL);
925 return AVERROR(ENOMEM);
928 sub_st->id = pes->pid;
929 avpriv_set_pts_info(sub_st, 33, 1, 90000);
930 sub_st->priv_data = sub_pes;
931 sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
932 sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
933 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
934 sub_pes->sub_st = pes->sub_st = sub_st;
937 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
938 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
939 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
940 st->codecpar->codec_id = old_codec_id;
941 st->codecpar->codec_type = old_codec_type;
943 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
944 (st->internal->request_probe > 0 && st->internal->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
945 st->probe_packets > 0 &&
946 stream_type == STREAM_TYPE_PRIVATE_DATA) {
947 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
948 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
949 st->internal->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
952 /* queue a context update if properties changed */
953 if (old_codec_type != st->codecpar->codec_type ||
954 old_codec_id != st->codecpar->codec_id ||
955 old_codec_tag != st->codecpar->codec_tag)
956 st->internal->need_context_update = 1;
961 static void reset_pes_packet_state(PESContext *pes)
963 pes->pts = AV_NOPTS_VALUE;
964 pes->dts = AV_NOPTS_VALUE;
967 av_buffer_unref(&pes->buffer);
970 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
973 pkt->data = (uint8_t *)buffer;
977 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
983 pkt->buf = pes->buffer;
984 pkt->data = pes->buffer->data;
985 pkt->size = pes->data_index;
987 if (pes->total_size != MAX_PES_PAYLOAD &&
988 pes->pes_header_size + pes->data_index != pes->total_size +
990 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
991 pes->flags |= AV_PKT_FLAG_CORRUPT;
993 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
995 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
996 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
997 pkt->stream_index = pes->sub_st->index;
999 pkt->stream_index = pes->st->index;
1000 pkt->pts = pes->pts;
1001 pkt->dts = pes->dts;
1002 /* store position of first TS packet of this PES packet */
1003 pkt->pos = pes->ts_packet_pos;
1004 pkt->flags = pes->flags;
1007 reset_pes_packet_state(pes);
1009 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
1011 return AVERROR(ENOMEM);
1012 *sd = pes->stream_id;
1017 static uint64_t get_ts64(GetBitContext *gb, int bits)
1019 if (get_bits_left(gb) < bits)
1020 return AV_NOPTS_VALUE;
1021 return get_bits64(gb, bits);
1024 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
1025 const uint8_t *buf, int buf_size)
1028 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1029 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1030 int dts_flag = -1, cts_flag = -1;
1031 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1032 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1033 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1035 memcpy(buf_padded, buf, buf_padded_size);
1037 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1039 if (sl->use_au_start)
1040 au_start_flag = get_bits1(&gb);
1042 au_end_flag = get_bits1(&gb);
1043 if (!sl->use_au_start && !sl->use_au_end)
1044 au_start_flag = au_end_flag = 1;
1045 if (sl->ocr_len > 0)
1046 ocr_flag = get_bits1(&gb);
1048 idle_flag = get_bits1(&gb);
1049 if (sl->use_padding)
1050 padding_flag = get_bits1(&gb);
1052 padding_bits = get_bits(&gb, 3);
1054 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1055 if (sl->packet_seq_num_len)
1056 skip_bits_long(&gb, sl->packet_seq_num_len);
1057 if (sl->degr_prior_len)
1059 skip_bits(&gb, sl->degr_prior_len);
1061 skip_bits_long(&gb, sl->ocr_len);
1062 if (au_start_flag) {
1063 if (sl->use_rand_acc_pt)
1065 if (sl->au_seq_num_len > 0)
1066 skip_bits_long(&gb, sl->au_seq_num_len);
1067 if (sl->use_timestamps) {
1068 dts_flag = get_bits1(&gb);
1069 cts_flag = get_bits1(&gb);
1072 if (sl->inst_bitrate_len)
1073 inst_bitrate_flag = get_bits1(&gb);
1075 dts = get_ts64(&gb, sl->timestamp_len);
1077 cts = get_ts64(&gb, sl->timestamp_len);
1079 skip_bits_long(&gb, sl->au_len);
1080 if (inst_bitrate_flag)
1081 skip_bits_long(&gb, sl->inst_bitrate_len);
1084 if (dts != AV_NOPTS_VALUE)
1086 if (cts != AV_NOPTS_VALUE)
1089 if (sl->timestamp_len && sl->timestamp_res)
1090 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1092 return (get_bits_count(&gb) + 7) >> 3;
1095 static AVBufferRef *buffer_pool_get(MpegTSContext *ts, int size)
1097 int index = av_log2(size + AV_INPUT_BUFFER_PADDING_SIZE);
1098 if (!ts->pools[index]) {
1099 int pool_size = FFMIN(MAX_PES_PAYLOAD + AV_INPUT_BUFFER_PADDING_SIZE, 2 << index);
1100 ts->pools[index] = av_buffer_pool_init(pool_size, NULL);
1101 if (!ts->pools[index])
1104 return av_buffer_pool_get(ts->pools[index]);
1107 /* return non zero if a packet could be constructed */
1108 static int mpegts_push_data(MpegTSFilter *filter,
1109 const uint8_t *buf, int buf_size, int is_start,
1112 PESContext *pes = filter->u.pes_filter.opaque;
1113 MpegTSContext *ts = pes->ts;
1121 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1122 ret = new_pes_packet(pes, ts->pkt);
1127 reset_pes_packet_state(pes);
1129 pes->state = MPEGTS_HEADER;
1130 pes->ts_packet_pos = pos;
1133 while (buf_size > 0) {
1134 switch (pes->state) {
1136 len = PES_START_SIZE - pes->data_index;
1139 memcpy(pes->header + pes->data_index, p, len);
1140 pes->data_index += len;
1143 if (pes->data_index == PES_START_SIZE) {
1144 /* we got all the PES or section header. We can now
1146 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1147 pes->header[2] == 0x01) {
1148 /* it must be an MPEG-2 PES stream */
1149 code = pes->header[3] | 0x100;
1150 av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1152 pes->stream_id = pes->header[3];
1154 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1156 pes->sub_st->discard == AVDISCARD_ALL)) ||
1157 code == 0x1be) /* padding_stream */
1160 /* stream not present in PMT */
1162 if (ts->skip_changes)
1164 if (ts->merge_pmt_versions)
1165 goto skip; /* wait for PMT to merge new stream */
1167 pes->st = avformat_new_stream(ts->stream, NULL);
1169 return AVERROR(ENOMEM);
1170 pes->st->id = pes->pid;
1171 mpegts_set_stream_info(pes->st, pes, 0, 0);
1174 pes->total_size = AV_RB16(pes->header + 4);
1175 /* NOTE: a zero total size means the PES size is
1177 if (!pes->total_size)
1178 pes->total_size = MAX_PES_PAYLOAD;
1180 /* allocate pes buffer */
1181 pes->buffer = buffer_pool_get(ts, pes->total_size);
1183 return AVERROR(ENOMEM);
1185 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1186 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1187 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1188 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1189 pes->state = MPEGTS_PESHEADER;
1190 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->internal->request_probe) {
1191 av_log(pes->stream, AV_LOG_TRACE,
1192 "pid=%x stream_type=%x probing\n",
1195 pes->st->internal->request_probe = 1;
1198 pes->pes_header_size = 6;
1199 pes->state = MPEGTS_PAYLOAD;
1200 pes->data_index = 0;
1203 /* otherwise, it should be a table */
1206 pes->state = MPEGTS_SKIP;
1211 /**********************************************/
1212 /* PES packing parsing */
1213 case MPEGTS_PESHEADER:
1214 len = PES_HEADER_SIZE - pes->data_index;
1216 return AVERROR_INVALIDDATA;
1219 memcpy(pes->header + pes->data_index, p, len);
1220 pes->data_index += len;
1223 if (pes->data_index == PES_HEADER_SIZE) {
1224 pes->pes_header_size = pes->header[8] + 9;
1225 pes->state = MPEGTS_PESHEADER_FILL;
1228 case MPEGTS_PESHEADER_FILL:
1229 len = pes->pes_header_size - pes->data_index;
1231 return AVERROR_INVALIDDATA;
1234 memcpy(pes->header + pes->data_index, p, len);
1235 pes->data_index += len;
1238 if (pes->data_index == pes->pes_header_size) {
1240 unsigned int flags, pes_ext, skip;
1242 flags = pes->header[7];
1243 r = pes->header + 9;
1244 pes->pts = AV_NOPTS_VALUE;
1245 pes->dts = AV_NOPTS_VALUE;
1246 if ((flags & 0xc0) == 0x80) {
1247 pes->dts = pes->pts = ff_parse_pes_pts(r);
1249 } else if ((flags & 0xc0) == 0xc0) {
1250 pes->pts = ff_parse_pes_pts(r);
1252 pes->dts = ff_parse_pes_pts(r);
1255 pes->extended_stream_id = -1;
1256 if (flags & 0x01) { /* PES extension */
1258 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1259 skip = (pes_ext >> 4) & 0xb;
1262 if ((pes_ext & 0x41) == 0x01 &&
1263 (r + 2) <= (pes->header + pes->pes_header_size)) {
1264 /* PES extension 2 */
1265 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1266 pes->extended_stream_id = r[1];
1270 /* we got the full header. We parse it and get the payload */
1271 pes->state = MPEGTS_PAYLOAD;
1272 pes->data_index = 0;
1273 if (pes->stream_type == 0x12 && buf_size > 0) {
1274 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1276 pes->pes_header_size += sl_header_bytes;
1277 p += sl_header_bytes;
1278 buf_size -= sl_header_bytes;
1280 if (pes->stream_type == 0x15 && buf_size >= 5) {
1281 /* skip metadata access unit header */
1282 pes->pes_header_size += 5;
1286 if ( pes->ts->fix_teletext_pts
1287 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1288 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1290 AVProgram *p = NULL;
1292 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1293 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1294 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1296 AVStream *st = NULL;
1297 if (f->type == MPEGTS_PES) {
1298 PESContext *pcrpes = f->u.pes_filter.opaque;
1301 } else if (f->type == MPEGTS_PCR) {
1303 for (i = 0; i < p->nb_stream_indexes; i++) {
1304 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1305 if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1309 if (f->last_pcr != -1 && !f->discard) {
1310 // teletext packets do not always have correct timestamps,
1311 // the standard says they should be handled after 40.6 ms at most,
1312 // and the pcr error to this packet should be no more than 100 ms.
1313 // TODO: we should interpolate the PCR, not just use the last one
1314 int64_t pcr = f->last_pcr / 300;
1317 pes->st->internal->pts_wrap_reference = st->internal->pts_wrap_reference;
1318 pes->st->internal->pts_wrap_behavior = st->internal->pts_wrap_behavior;
1320 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1321 pes->pts = pes->dts = pcr;
1322 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1323 pes->dts > pcr + 3654 + 9000) {
1324 pes->pts = pes->dts = pcr + 3654 + 9000;
1325 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1326 pes->dts > pcr + 10*90000) { //10sec
1327 pes->pts = pes->dts = pcr + 3654 + 9000;
1335 if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1337 av_log(pes->stream, AV_LOG_VERBOSE,
1338 "Forcing DTS/PTS to be unset for a "
1339 "non-trustworthy PES packet for PID %d as "
1340 "PCR hasn't been received yet.\n",
1342 pes->dts = pes->pts = AV_NOPTS_VALUE;
1347 case MPEGTS_PAYLOAD:
1349 if (pes->data_index > 0 &&
1350 pes->data_index + buf_size > pes->total_size) {
1351 ret = new_pes_packet(pes, ts->pkt);
1354 pes->total_size = MAX_PES_PAYLOAD;
1355 pes->buffer = buffer_pool_get(ts, pes->total_size);
1357 return AVERROR(ENOMEM);
1359 } else if (pes->data_index == 0 &&
1360 buf_size > pes->total_size) {
1361 // pes packet size is < ts size packet and pes data is padded with 0xff
1362 // not sure if this is legal in ts but see issue #2392
1363 buf_size = pes->total_size;
1365 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1366 pes->data_index += buf_size;
1367 /* emit complete packets with known packet size
1368 * decreases demuxer delay for infrequent packets like subtitles from
1369 * a couple of seconds to milliseconds for properly muxed files.
1370 * total_size is the number of bytes following pes_packet_length
1371 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1372 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1373 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1375 ret = new_pes_packet(pes, ts->pkt);
1391 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1396 /* if no pid found, then add a pid context */
1397 pes = av_mallocz(sizeof(PESContext));
1401 pes->stream = ts->stream;
1403 pes->pcr_pid = pcr_pid;
1404 pes->state = MPEGTS_SKIP;
1405 pes->pts = AV_NOPTS_VALUE;
1406 pes->dts = AV_NOPTS_VALUE;
1407 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1416 typedef struct MP4DescrParseContext {
1420 Mp4Descr *active_descr;
1422 int max_descr_count;
1424 int predefined_SLConfigDescriptor_seen;
1425 } MP4DescrParseContext;
1427 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1428 const uint8_t *buf, unsigned size,
1429 Mp4Descr *descr, int max_descr_count)
1432 if (size > (1 << 30))
1433 return AVERROR_INVALIDDATA;
1435 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1436 NULL, NULL, NULL, NULL)) < 0)
1443 d->active_descr = NULL;
1444 d->max_descr_count = max_descr_count;
1449 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1451 int64_t new_off = avio_tell(pb);
1452 (*len) -= new_off - *off;
1456 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1459 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1462 int ret = parse_mp4_descr(d, off, len, 0);
1465 update_offsets(&d->pb, &off, &len);
1470 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1472 avio_rb16(&d->pb); // ID
1478 update_offsets(&d->pb, &off, &len);
1479 return parse_mp4_descr_arr(d, off, len);
1482 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1487 id_flags = avio_rb16(&d->pb);
1488 if (!(id_flags & 0x0020)) { // URL_Flag
1489 update_offsets(&d->pb, &off, &len);
1490 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1496 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1501 if (d->descr_count >= d->max_descr_count)
1502 return AVERROR_INVALIDDATA;
1503 ff_mp4_parse_es_descr(&d->pb, &es_id);
1504 d->active_descr = d->descr + (d->descr_count++);
1506 d->active_descr->es_id = es_id;
1507 update_offsets(&d->pb, &off, &len);
1508 if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1510 update_offsets(&d->pb, &off, &len);
1512 ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1513 d->active_descr = NULL;
1517 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1520 Mp4Descr *descr = d->active_descr;
1522 return AVERROR_INVALIDDATA;
1523 d->active_descr->dec_config_descr = av_malloc(len);
1524 if (!descr->dec_config_descr)
1525 return AVERROR(ENOMEM);
1526 descr->dec_config_descr_len = len;
1527 avio_read(&d->pb, descr->dec_config_descr, len);
1531 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1533 Mp4Descr *descr = d->active_descr;
1536 return AVERROR_INVALIDDATA;
1538 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1539 descr->sl.dst = avio_r8(&d->pb); \
1540 if (descr->sl.dst > maxv) { \
1541 descr->sl.dst = maxv; \
1542 return AVERROR_INVALIDDATA; \
1546 predefined = avio_r8(&d->pb);
1549 int flags = avio_r8(&d->pb);
1550 descr->sl.use_au_start = !!(flags & 0x80);
1551 descr->sl.use_au_end = !!(flags & 0x40);
1552 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1553 descr->sl.use_padding = !!(flags & 0x08);
1554 descr->sl.use_timestamps = !!(flags & 0x04);
1555 descr->sl.use_idle = !!(flags & 0x02);
1556 descr->sl.timestamp_res = avio_rb32(&d->pb);
1558 R8_CHECK_CLIP_MAX(timestamp_len, 63);
1559 R8_CHECK_CLIP_MAX(ocr_len, 63);
1560 R8_CHECK_CLIP_MAX(au_len, 31);
1561 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1562 lengths = avio_rb16(&d->pb);
1563 descr->sl.degr_prior_len = lengths >> 12;
1564 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1565 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1566 } else if (!d->predefined_SLConfigDescriptor_seen){
1567 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1568 d->predefined_SLConfigDescriptor_seen = 1;
1573 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1577 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1580 update_offsets(&d->pb, &off, &len);
1581 if (len < 0 || len1 > len || len1 <= 0) {
1582 av_log(d->s, AV_LOG_ERROR,
1583 "Tag %x length violation new length %d bytes remaining %d\n",
1585 return AVERROR_INVALIDDATA;
1588 if (d->level++ >= MAX_LEVEL) {
1589 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1590 ret = AVERROR_INVALIDDATA;
1594 if (target_tag && tag != target_tag) {
1595 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1597 ret = AVERROR_INVALIDDATA;
1603 ret = parse_MP4IODescrTag(d, off, len1);
1606 ret = parse_MP4ODescrTag(d, off, len1);
1609 ret = parse_MP4ESDescrTag(d, off, len1);
1611 case MP4DecConfigDescrTag:
1612 ret = parse_MP4DecConfigDescrTag(d, off, len1);
1615 ret = parse_MP4SLDescrTag(d, off, len1);
1622 avio_seek(&d->pb, off + len1, SEEK_SET);
1626 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1627 Mp4Descr *descr, int *descr_count, int max_descr_count)
1629 MP4DescrParseContext d;
1632 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1636 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1638 *descr_count = d.descr_count;
1642 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1643 Mp4Descr *descr, int *descr_count, int max_descr_count)
1645 MP4DescrParseContext d;
1648 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1652 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1654 *descr_count = d.descr_count;
1658 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1661 MpegTSContext *ts = filter->u.section_filter.opaque;
1662 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1664 const uint8_t *p, *p_end;
1666 int mp4_descr_count = 0;
1667 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1669 AVFormatContext *s = ts->stream;
1671 p_end = section + section_len - 4;
1673 if (parse_section_header(&h, &p, p_end) < 0)
1675 if (h.tid != M4OD_TID)
1677 if (skip_identical(&h, tssf))
1680 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1681 MAX_MP4_DESCR_COUNT);
1683 for (pid = 0; pid < NB_PID_MAX; pid++) {
1686 for (i = 0; i < mp4_descr_count; i++) {
1689 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1691 if (ts->pids[pid]->type != MPEGTS_PES) {
1692 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1695 pes = ts->pids[pid]->u.pes_filter.opaque;
1700 pes->sl = mp4_descr[i].sl;
1702 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1703 mp4_descr[i].dec_config_descr_len, 0,
1704 NULL, NULL, NULL, NULL);
1705 ff_mp4_read_dec_config_descr(s, st, &pb);
1706 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1707 st->codecpar->extradata_size > 0)
1708 st->need_parsing = 0;
1709 if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1710 st->codecpar->extradata_size > 0)
1711 st->need_parsing = 0;
1713 st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1714 st->internal->need_context_update = 1;
1717 for (i = 0; i < mp4_descr_count; i++)
1718 av_free(mp4_descr[i].dec_config_descr);
1721 static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1724 AVProgram *prg = NULL;
1725 MpegTSContext *ts = filter->u.section_filter.opaque;
1727 int idx = ff_find_stream_index(ts->stream, filter->pid);
1732 * In case we receive an SCTE-35 packet before mpegts context is fully
1738 new_data_packet(section, section_len, ts->pkt);
1739 ts->pkt->stream_index = idx;
1740 prg = av_find_program_from_stream(ts->stream, NULL, idx);
1741 if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1742 MpegTSFilter *f = ts->pids[prg->pcr_pid];
1743 if (f && f->last_pcr != -1)
1744 ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1750 static const uint8_t opus_coupled_stream_cnt[9] = {
1751 1, 0, 1, 1, 2, 2, 2, 3, 3
1754 static const uint8_t opus_stream_cnt[9] = {
1755 1, 1, 1, 2, 2, 3, 4, 4, 5,
1758 static const uint8_t opus_channel_map[8][8] = {
1766 { 0,6,1,2,3,4,5,7 },
1769 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1770 const uint8_t **pp, const uint8_t *desc_list_end,
1771 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1774 const uint8_t *desc_end;
1775 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1779 desc_tag = get8(pp, desc_list_end);
1781 return AVERROR_INVALIDDATA;
1782 desc_len = get8(pp, desc_list_end);
1784 return AVERROR_INVALIDDATA;
1785 desc_end = *pp + desc_len;
1786 if (desc_end > desc_list_end)
1787 return AVERROR_INVALIDDATA;
1789 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1791 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->internal->request_probe > 0) &&
1792 stream_type == STREAM_TYPE_PRIVATE_DATA)
1793 mpegts_find_stream_type(st, desc_tag, DESC_types);
1796 case VIDEO_STREAM_DESCRIPTOR:
1797 if (get8(pp, desc_end) & 0x1) {
1798 st->disposition |= AV_DISPOSITION_STILL_IMAGE;
1802 desc_es_id = get16(pp, desc_end);
1805 if (ts && ts->pids[pid])
1806 ts->pids[pid]->es_id = desc_es_id;
1807 for (i = 0; i < mp4_descr_count; i++)
1808 if (mp4_descr[i].dec_config_descr_len &&
1809 mp4_descr[i].es_id == desc_es_id) {
1811 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1812 mp4_descr[i].dec_config_descr_len, 0,
1813 NULL, NULL, NULL, NULL);
1814 ff_mp4_read_dec_config_descr(fc, st, &pb);
1815 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1816 st->codecpar->extradata_size > 0) {
1817 st->need_parsing = 0;
1818 st->internal->need_context_update = 1;
1820 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1821 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1824 case FMC_DESCRIPTOR:
1825 if (get16(pp, desc_end) < 0)
1827 if (mp4_descr_count > 0 &&
1828 (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1829 (st->internal->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1830 st->internal->request_probe > 0) &&
1831 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1833 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1834 mp4_descr->dec_config_descr_len, 0,
1835 NULL, NULL, NULL, NULL);
1836 ff_mp4_read_dec_config_descr(fc, st, &pb);
1837 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1838 st->codecpar->extradata_size > 0) {
1839 st->internal->request_probe = st->need_parsing = 0;
1840 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1841 st->internal->need_context_update = 1;
1845 case 0x56: /* DVB teletext descriptor */
1847 uint8_t *extradata = NULL;
1848 int language_count = desc_len / 5, ret;
1850 if (desc_len > 0 && desc_len % 5 != 0)
1851 return AVERROR_INVALIDDATA;
1853 if (language_count > 0) {
1854 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1855 av_assert0(language_count <= sizeof(language) / 4);
1857 if (st->codecpar->extradata == NULL) {
1858 ret = ff_alloc_extradata(st->codecpar, language_count * 2);
1863 if (st->codecpar->extradata_size < language_count * 2)
1864 return AVERROR_INVALIDDATA;
1866 extradata = st->codecpar->extradata;
1868 for (i = 0; i < language_count; i++) {
1869 language[i * 4 + 0] = get8(pp, desc_end);
1870 language[i * 4 + 1] = get8(pp, desc_end);
1871 language[i * 4 + 2] = get8(pp, desc_end);
1872 language[i * 4 + 3] = ',';
1874 memcpy(extradata, *pp, 2);
1880 language[i * 4 - 1] = 0;
1881 av_dict_set(&st->metadata, "language", language, 0);
1882 st->internal->need_context_update = 1;
1886 case 0x59: /* subtitling descriptor */
1888 /* 8 bytes per DVB subtitle substream data:
1889 * ISO_639_language_code (3 bytes),
1890 * subtitling_type (1 byte),
1891 * composition_page_id (2 bytes),
1892 * ancillary_page_id (2 bytes) */
1893 int language_count = desc_len / 8, ret;
1895 if (desc_len > 0 && desc_len % 8 != 0)
1896 return AVERROR_INVALIDDATA;
1898 if (language_count > 1) {
1899 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1902 if (language_count > 0) {
1905 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1906 av_assert0(language_count <= sizeof(language) / 4);
1908 if (st->codecpar->extradata == NULL) {
1909 ret = ff_alloc_extradata(st->codecpar, language_count * 5);
1914 if (st->codecpar->extradata_size < language_count * 5)
1915 return AVERROR_INVALIDDATA;
1917 extradata = st->codecpar->extradata;
1919 for (i = 0; i < language_count; i++) {
1920 language[i * 4 + 0] = get8(pp, desc_end);
1921 language[i * 4 + 1] = get8(pp, desc_end);
1922 language[i * 4 + 2] = get8(pp, desc_end);
1923 language[i * 4 + 3] = ',';
1925 /* hearing impaired subtitles detection using subtitling_type */
1927 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1928 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1929 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1930 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1931 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1932 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1933 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1937 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1938 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1944 language[i * 4 - 1] = 0;
1945 av_dict_set(&st->metadata, "language", language, 0);
1946 st->internal->need_context_update = 1;
1950 case ISO_639_LANGUAGE_DESCRIPTOR:
1951 for (i = 0; i + 4 <= desc_len; i += 4) {
1952 language[i + 0] = get8(pp, desc_end);
1953 language[i + 1] = get8(pp, desc_end);
1954 language[i + 2] = get8(pp, desc_end);
1955 language[i + 3] = ',';
1956 switch (get8(pp, desc_end)) {
1958 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1961 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1964 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1965 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
1969 if (i && language[0]) {
1970 language[i - 1] = 0;
1971 /* don't overwrite language, as it may already have been set by
1972 * another, more specific descriptor (e.g. supplementary audio) */
1973 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
1976 case REGISTRATION_DESCRIPTOR:
1977 st->codecpar->codec_tag = bytestream_get_le32(pp);
1978 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1979 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->internal->request_probe > 0) {
1980 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1981 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1982 st->internal->request_probe = 50;
1985 case 0x52: /* stream identifier descriptor */
1986 st->stream_identifier = 1 + get8(pp, desc_end);
1988 case METADATA_DESCRIPTOR:
1989 if (get16(pp, desc_end) == 0xFFFF)
1991 if (get8(pp, desc_end) == 0xFF) {
1992 st->codecpar->codec_tag = bytestream_get_le32(pp);
1993 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
1994 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
1997 case 0x7f: /* DVB extension descriptor */
1998 ext_desc_tag = get8(pp, desc_end);
1999 if (ext_desc_tag < 0)
2000 return AVERROR_INVALIDDATA;
2001 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
2002 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2003 if (!st->codecpar->extradata) {
2004 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
2005 AV_INPUT_BUFFER_PADDING_SIZE);
2006 if (!st->codecpar->extradata)
2007 return AVERROR(ENOMEM);
2009 st->codecpar->extradata_size = sizeof(opus_default_extradata);
2010 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
2012 channel_config_code = get8(pp, desc_end);
2013 if (channel_config_code < 0)
2014 return AVERROR_INVALIDDATA;
2015 if (channel_config_code <= 0x8) {
2016 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2017 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2018 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2019 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2020 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2022 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2024 st->need_parsing = AVSTREAM_PARSE_FULL;
2025 st->internal->need_context_update = 1;
2028 if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
2032 return AVERROR_INVALIDDATA;
2033 flags = get8(pp, desc_end);
2035 if ((flags & 0x80) == 0) /* mix_type */
2036 st->disposition |= AV_DISPOSITION_DEPENDENT;
2038 switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2040 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2041 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2044 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2047 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2051 if (flags & 0x01) { /* language_code_present */
2053 return AVERROR_INVALIDDATA;
2054 language[0] = get8(pp, desc_end);
2055 language[1] = get8(pp, desc_end);
2056 language[2] = get8(pp, desc_end);
2059 /* This language always has to override a possible
2060 * ISO 639 language descriptor language */
2062 av_dict_set(&st->metadata, "language", language, 0);
2066 case 0x6a: /* ac-3_descriptor */
2068 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2069 if (component_type_flag) {
2070 int component_type = get8(pp, desc_end);
2071 int service_type_mask = 0x38; // 0b00111000
2072 int service_type = ((component_type & service_type_mask) >> 3);
2073 if (service_type == 0x02 /* 0b010 */) {
2074 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2075 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2080 case 0x7a: /* enhanced_ac-3_descriptor */
2082 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2083 if (component_type_flag) {
2084 int component_type = get8(pp, desc_end);
2085 int service_type_mask = 0x38; // 0b00111000
2086 int service_type = ((component_type & service_type_mask) >> 3);
2087 if (service_type == 0x02 /* 0b010 */) {
2088 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2089 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2094 case 0xfd: /* ARIB data coding type descriptor */
2095 // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2097 if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2098 // This structure is defined in STD-B10, part 1, listing 5.4 and
2100 // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2101 // Component tag limits are documented in TR-B14, fascicle 2,
2102 // Vol. 3, Section 2, 4.2.8.1
2103 int actual_component_tag = st->stream_identifier - 1;
2104 int picked_profile = FF_PROFILE_UNKNOWN;
2105 int data_component_id = get16(pp, desc_end);
2106 if (data_component_id < 0)
2107 return AVERROR_INVALIDDATA;
2109 switch (data_component_id) {
2111 // [0x30..0x37] are component tags utilized for
2112 // non-mobile captioning service ("profile A").
2113 if (actual_component_tag >= 0x30 &&
2114 actual_component_tag <= 0x37) {
2115 picked_profile = FF_PROFILE_ARIB_PROFILE_A;
2119 // component tag 0x87 signifies a mobile/partial reception
2120 // (1seg) captioning service ("profile C").
2121 if (actual_component_tag == 0x87) {
2122 picked_profile = FF_PROFILE_ARIB_PROFILE_C;
2129 if (picked_profile == FF_PROFILE_UNKNOWN)
2132 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2133 st->codecpar->codec_id = AV_CODEC_ID_ARIB_CAPTION;
2134 st->codecpar->profile = picked_profile;
2135 st->internal->request_probe = 0;
2138 case 0xb0: /* DOVI video stream descriptor */
2141 AVDOVIDecoderConfigurationRecord *dovi;
2144 if (desc_end - *pp < 4) // (8 + 8 + 7 + 6 + 1 + 1 + 1) / 8
2145 return AVERROR_INVALIDDATA;
2147 dovi = av_dovi_alloc(&dovi_size);
2149 return AVERROR(ENOMEM);
2151 dovi->dv_version_major = get8(pp, desc_end);
2152 dovi->dv_version_minor = get8(pp, desc_end);
2153 buf = get16(pp, desc_end);
2154 dovi->dv_profile = (buf >> 9) & 0x7f; // 7 bits
2155 dovi->dv_level = (buf >> 3) & 0x3f; // 6 bits
2156 dovi->rpu_present_flag = (buf >> 2) & 0x01; // 1 bit
2157 dovi->el_present_flag = (buf >> 1) & 0x01; // 1 bit
2158 dovi->bl_present_flag = buf & 0x01; // 1 bit
2159 if (desc_end - *pp >= 20) { // 4 + 4 * 4
2160 buf = get8(pp, desc_end);
2161 dovi->dv_bl_signal_compatibility_id = (buf >> 4) & 0x0f; // 4 bits
2163 // 0 stands for None
2164 // Dolby Vision V1.2.93 profiles and levels
2165 dovi->dv_bl_signal_compatibility_id = 0;
2168 ret = av_stream_add_side_data(st, AV_PKT_DATA_DOVI_CONF,
2169 (uint8_t *)dovi, dovi_size);
2175 av_log(fc, AV_LOG_TRACE, "DOVI, version: %d.%d, profile: %d, level: %d, "
2176 "rpu flag: %d, el flag: %d, bl flag: %d, compatibility id: %d\n",
2177 dovi->dv_version_major, dovi->dv_version_minor,
2178 dovi->dv_profile, dovi->dv_level,
2179 dovi->rpu_present_flag,
2180 dovi->el_present_flag,
2181 dovi->bl_present_flag,
2182 dovi->dv_bl_signal_compatibility_id);
2192 static AVStream *find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid,
2193 int stream_identifier, int pmt_stream_idx)
2195 AVFormatContext *s = ts->stream;
2197 AVStream *found = NULL;
2199 for (i = 0; i < s->nb_streams; i++) {
2200 AVStream *st = s->streams[i];
2201 if (st->program_num != programid)
2203 if (stream_identifier != -1) { /* match based on "stream identifier descriptor" if present */
2204 if (st->stream_identifier == stream_identifier+1) {
2208 } else if (st->pmt_stream_idx == pmt_stream_idx) { /* match based on position within the PMT */
2215 av_log(ts->stream, AV_LOG_VERBOSE,
2216 "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2217 av_get_media_type_string(found->codecpar->codec_type),
2224 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2226 const uint8_t **pp = &p;
2227 const uint8_t *desc_list_end;
2228 const uint8_t *desc_end;
2230 int desc_len, desc_tag;
2232 desc_list_len = get16(pp, p_end);
2233 if (desc_list_len < 0)
2235 desc_list_len &= 0xfff;
2236 desc_list_end = p + desc_list_len;
2237 if (desc_list_end > p_end)
2241 desc_tag = get8(pp, desc_list_end);
2244 desc_len = get8(pp, desc_list_end);
2247 desc_end = *pp + desc_len;
2248 if (desc_end > desc_list_end)
2251 if (desc_tag == 0x52) {
2252 return get8(pp, desc_end);
2260 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2262 return !(stream_type == 0x13 ||
2263 (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
2266 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2268 MpegTSContext *ts = filter->u.section_filter.opaque;
2269 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2270 SectionHeader h1, *h = &h1;
2273 const uint8_t *p, *p_end, *desc_list_end;
2274 int program_info_length, pcr_pid, pid, stream_type;
2276 uint32_t prog_reg_desc = 0; /* registration descriptor */
2277 int stream_identifier = -1;
2278 struct Program *prg;
2280 int mp4_descr_count = 0;
2281 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2284 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2285 hex_dump_debug(ts->stream, section, section_len);
2287 p_end = section + section_len - 4;
2289 if (parse_section_header(h, &p, p_end) < 0)
2291 if (h->tid != PMT_TID)
2293 if (skip_identical(h, tssf))
2296 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2297 h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2299 if (!ts->scan_all_pmts && ts->skip_changes)
2302 prg = get_program(ts, h->id);
2304 if (ts->skip_unknown_pmt && !prg)
2306 if (!ts->skip_clear) {
2307 clear_avprogram(ts, h->id);
2311 pcr_pid = get16(&p, p_end);
2315 add_pid_to_program(prg, pcr_pid);
2316 update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2318 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2320 program_info_length = get16(&p, p_end);
2321 if (program_info_length < 0)
2323 program_info_length &= 0xfff;
2324 while (program_info_length >= 2) {
2326 tag = get8(&p, p_end);
2327 len = get8(&p, p_end);
2329 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2331 if (len > program_info_length - 2)
2332 // something else is broken, exit the program_descriptors_loop
2334 program_info_length -= len + 2;
2335 if (tag == IOD_DESCRIPTOR) {
2336 get8(&p, p_end); // scope
2337 get8(&p, p_end); // label
2339 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2340 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2341 } else if (tag == REGISTRATION_DESCRIPTOR && len >= 4) {
2342 prog_reg_desc = bytestream_get_le32(&p);
2347 p += program_info_length;
2351 // stop parsing after pmt, we found header
2358 for (i = 0; ; i++) {
2361 stream_type = get8(&p, p_end);
2362 if (stream_type < 0)
2364 pid = get16(&p, p_end);
2368 if (pid == ts->current_pid)
2371 if (ts->merge_pmt_versions)
2372 stream_identifier = parse_stream_identifier_desc(p, p_end);
2374 /* now create stream */
2375 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2376 pes = ts->pids[pid]->u.pes_filter.opaque;
2377 if (ts->merge_pmt_versions && !pes->st) {
2378 st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2381 pes->stream_type = stream_type;
2386 pes->st = avformat_new_stream(pes->stream, NULL);
2389 pes->st->id = pes->pid;
2390 pes->st->program_num = h->id;
2391 pes->st->pmt_version = h->version;
2392 pes->st->pmt_stream_idx = i;
2395 } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2397 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2398 pes = add_pes_stream(ts, pid, pcr_pid);
2399 if (ts->merge_pmt_versions && pes && !pes->st) {
2400 st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2403 pes->stream_type = stream_type;
2407 if (pes && !pes->st) {
2408 st = avformat_new_stream(pes->stream, NULL);
2412 st->program_num = h->id;
2413 st->pmt_version = h->version;
2414 st->pmt_stream_idx = i;
2417 int idx = ff_find_stream_index(ts->stream, pid);
2419 st = ts->stream->streams[idx];
2421 if (ts->merge_pmt_versions && !st) {
2422 st = find_matching_stream(ts, pid, h->id, stream_identifier, i);
2425 st = avformat_new_stream(ts->stream, NULL);
2429 st->program_num = h->id;
2430 st->pmt_version = h->version;
2431 st->pmt_stream_idx = i;
2432 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2433 if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2434 mpegts_find_stream_type(st, stream_type, SCTE_types);
2435 mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2443 if (pes && !pes->stream_type)
2444 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2446 add_pid_to_program(prg, pid);
2448 av_program_add_stream_index(ts->stream, h->id, st->index);
2450 desc_list_len = get16(&p, p_end);
2451 if (desc_list_len < 0)
2453 desc_list_len &= 0xfff;
2454 desc_list_end = p + desc_list_len;
2455 if (desc_list_end > p_end)
2458 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2459 desc_list_end, mp4_descr,
2460 mp4_descr_count, pid, ts) < 0)
2463 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2464 stream_type == 0x83 && pes->sub_st) {
2465 av_program_add_stream_index(ts->stream, h->id,
2466 pes->sub_st->index);
2467 pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2473 if (!ts->pids[pcr_pid])
2474 mpegts_open_pcr_filter(ts, pcr_pid);
2477 for (i = 0; i < mp4_descr_count; i++)
2478 av_free(mp4_descr[i].dec_config_descr);
2481 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2483 MpegTSContext *ts = filter->u.section_filter.opaque;
2484 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2485 SectionHeader h1, *h = &h1;
2486 const uint8_t *p, *p_end;
2490 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2491 hex_dump_debug(ts->stream, section, section_len);
2493 p_end = section + section_len - 4;
2495 if (parse_section_header(h, &p, p_end) < 0)
2497 if (h->tid != PAT_TID)
2499 if (ts->skip_changes)
2502 if (skip_identical(h, tssf))
2504 ts->stream->ts_id = h->id;
2508 sid = get16(&p, p_end);
2511 pmt_pid = get16(&p, p_end);
2516 if (pmt_pid == ts->current_pid)
2519 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2521 if (sid == 0x0000) {
2524 MpegTSFilter *fil = ts->pids[pmt_pid];
2525 struct Program *prg;
2526 program = av_new_program(ts->stream, sid);
2528 program->program_num = sid;
2529 program->pmt_pid = pmt_pid;
2532 if ( fil->type != MPEGTS_SECTION
2533 || fil->pid != pmt_pid
2534 || fil->u.section_filter.section_cb != pmt_cb)
2535 mpegts_close_filter(ts, ts->pids[pmt_pid]);
2537 if (!ts->pids[pmt_pid])
2538 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2539 prg = add_program(ts, sid);
2540 add_pid_to_program(prg, pmt_pid);
2546 for (j=0; j<ts->stream->nb_programs; j++) {
2547 for (i = 0; i < ts->nb_prg; i++)
2548 if (ts->prg[i].id == ts->stream->programs[j]->id)
2550 if (i==ts->nb_prg && !ts->skip_clear)
2551 clear_avprogram(ts, ts->stream->programs[j]->id);
2556 static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2558 MpegTSContext *ts = filter->u.section_filter.opaque;
2559 const uint8_t *p, *p_end;
2560 SectionHeader h1, *h = &h1;
2563 * Sometimes we receive EPG packets but SDT table do not have
2564 * eit_pres_following or eit_sched turned on, so we open EPG
2565 * stream directly here.
2567 if (!ts->epg_stream) {
2568 ts->epg_stream = avformat_new_stream(ts->stream, NULL);
2569 if (!ts->epg_stream)
2571 ts->epg_stream->id = EIT_PID;
2572 ts->epg_stream->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2573 ts->epg_stream->codecpar->codec_id = AV_CODEC_ID_EPG;
2576 if (ts->epg_stream->discard == AVDISCARD_ALL)
2579 p_end = section + section_len - 4;
2582 if (parse_section_header(h, &p, p_end) < 0)
2584 if (h->tid < EIT_TID || h->tid > OEITS_END_TID)
2587 av_log(ts->stream, AV_LOG_TRACE, "EIT: tid received = %.02x\n", h->tid);
2590 * Service_id 0xFFFF is reserved, it indicates that the current EIT table
2593 if (h->id == 0xFFFF) {
2594 av_log(ts->stream, AV_LOG_TRACE, "Scrambled EIT table received.\n");
2599 * In case we receive an EPG packet before mpegts context is fully
2605 new_data_packet(section, section_len, ts->pkt);
2606 ts->pkt->stream_index = ts->epg_stream->index;
2610 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2612 MpegTSContext *ts = filter->u.section_filter.opaque;
2613 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2614 SectionHeader h1, *h = &h1;
2615 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2616 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2617 char *name, *provider_name;
2619 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2620 hex_dump_debug(ts->stream, section, section_len);
2622 p_end = section + section_len - 4;
2624 if (parse_section_header(h, &p, p_end) < 0)
2626 if (h->tid != SDT_TID)
2628 if (ts->skip_changes)
2630 if (skip_identical(h, tssf))
2633 onid = get16(&p, p_end);
2636 val = get8(&p, p_end);
2640 sid = get16(&p, p_end);
2643 val = get8(&p, p_end);
2646 desc_list_len = get16(&p, p_end);
2647 if (desc_list_len < 0)
2649 desc_list_len &= 0xfff;
2650 desc_list_end = p + desc_list_len;
2651 if (desc_list_end > p_end)
2654 desc_tag = get8(&p, desc_list_end);
2657 desc_len = get8(&p, desc_list_end);
2658 desc_end = p + desc_len;
2659 if (desc_len < 0 || desc_end > desc_list_end)
2662 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2663 desc_tag, desc_len);
2667 service_type = get8(&p, p_end);
2668 if (service_type < 0)
2670 provider_name = getstr8(&p, p_end);
2673 name = getstr8(&p, p_end);
2675 AVProgram *program = av_new_program(ts->stream, sid);
2677 av_dict_set(&program->metadata, "service_name", name, 0);
2678 av_dict_set(&program->metadata, "service_provider",
2683 av_free(provider_name);
2694 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2695 const uint8_t *packet);
2697 /* handle one TS packet */
2698 static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
2701 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2702 has_adaptation, has_payload;
2703 const uint8_t *p, *p_end;
2705 pid = AV_RB16(packet + 1) & 0x1fff;
2706 is_start = packet[1] & 0x40;
2707 tss = ts->pids[pid];
2708 if (ts->auto_guess && !tss && is_start) {
2709 add_pes_stream(ts, pid, -1);
2710 tss = ts->pids[pid];
2715 tss->discard = discard_pid(ts, pid);
2718 ts->current_pid = pid;
2720 afc = (packet[3] >> 4) & 3;
2721 if (afc == 0) /* reserved value */
2723 has_adaptation = afc & 2;
2724 has_payload = afc & 1;
2725 is_discontinuity = has_adaptation &&
2726 packet[4] != 0 && /* with length > 0 */
2727 (packet[5] & 0x80); /* and discontinuity indicated */
2729 /* continuity check (currently not used) */
2730 cc = (packet[3] & 0xf);
2731 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2732 cc_ok = pid == 0x1FFF || // null packet PID
2739 av_log(ts->stream, AV_LOG_DEBUG,
2740 "Continuity check failed for pid %d expected %d got %d\n",
2741 pid, expected_cc, cc);
2742 if (tss->type == MPEGTS_PES) {
2743 PESContext *pc = tss->u.pes_filter.opaque;
2744 pc->flags |= AV_PKT_FLAG_CORRUPT;
2748 if (packet[1] & 0x80) {
2749 av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2750 if (tss->type == MPEGTS_PES) {
2751 PESContext *pc = tss->u.pes_filter.opaque;
2752 pc->flags |= AV_PKT_FLAG_CORRUPT;
2757 if (has_adaptation) {
2760 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2761 tss->last_pcr = pcr_h * 300 + pcr_l;
2762 /* skip adaptation field */
2765 /* if past the end of packet, ignore */
2766 p_end = packet + TS_PACKET_SIZE;
2767 if (p >= p_end || !has_payload)
2771 av_assert0(pos >= TS_PACKET_SIZE);
2772 ts->pos47_full = pos - TS_PACKET_SIZE;
2775 if (tss->type == MPEGTS_SECTION) {
2777 /* pointer field present */
2779 if (len > p_end - p)
2782 /* write remaining section bytes */
2783 write_section_data(ts, tss,
2785 /* check whether filter has been closed */
2791 write_section_data(ts, tss,
2796 write_section_data(ts, tss,
2801 // stop find_stream_info from waiting for more streams
2802 // when all programs have received a PMT
2803 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2805 for (i = 0; i < ts->nb_prg; i++) {
2806 if (!ts->prg[i].pmt_found)
2809 if (i == ts->nb_prg && ts->nb_prg > 0) {
2811 for (i = 0; i < ts->stream->nb_streams; i++) {
2812 AVStream *st = ts->stream->streams[i];
2813 if (st->codecpar->codec_type >= 0)
2814 types |= 1<<st->codecpar->codec_type;
2816 if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2817 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2818 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2825 // Note: The position here points actually behind the current packet.
2826 if (tss->type == MPEGTS_PES) {
2827 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2828 pos - ts->raw_packet_size)) < 0)
2836 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2838 MpegTSContext *ts = s->priv_data;
2839 AVIOContext *pb = s->pb;
2841 uint64_t pos = avio_tell(pb);
2842 int64_t back = FFMIN(seekback, pos);
2844 //Special case for files like 01c56b0dc1.ts
2845 if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2846 avio_seek(pb, 12 - back, SEEK_CUR);
2850 avio_seek(pb, -back, SEEK_CUR);
2852 for (i = 0; i < ts->resync_size; i++) {
2857 int new_packet_size, ret;
2858 avio_seek(pb, -1, SEEK_CUR);
2859 pos = avio_tell(pb);
2860 ret = ffio_ensure_seekback(pb, PROBE_PACKET_MAX_BUF);
2863 new_packet_size = get_packet_size(s);
2864 if (new_packet_size > 0 && new_packet_size != ts->raw_packet_size) {
2865 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", new_packet_size);
2866 ts->raw_packet_size = new_packet_size;
2868 avio_seek(pb, pos, SEEK_SET);
2872 av_log(s, AV_LOG_ERROR,
2873 "max resync size reached, could not find sync byte\n");
2875 return AVERROR_INVALIDDATA;
2878 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2879 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2880 const uint8_t **data)
2882 AVIOContext *pb = s->pb;
2886 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2887 if (len != TS_PACKET_SIZE)
2888 return len < 0 ? len : AVERROR_EOF;
2889 /* check packet sync byte */
2890 if ((*data)[0] != 0x47) {
2891 /* find a new packet start */
2893 if (mpegts_resync(s, raw_packet_size, *data) < 0)
2894 return AVERROR(EAGAIN);
2904 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2906 AVIOContext *pb = s->pb;
2907 int skip = raw_packet_size - TS_PACKET_SIZE;
2909 avio_skip(pb, skip);
2912 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2914 AVFormatContext *s = ts->stream;
2915 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2916 const uint8_t *data;
2920 if (avio_tell(s->pb) != ts->last_pos) {
2922 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2923 /* seek detected, flush pes buffer */
2924 for (i = 0; i < NB_PID_MAX; i++) {
2926 if (ts->pids[i]->type == MPEGTS_PES) {
2927 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2928 av_buffer_unref(&pes->buffer);
2929 pes->data_index = 0;
2930 pes->state = MPEGTS_SKIP; /* skip until pes header */
2931 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2932 ts->pids[i]->u.section_filter.last_ver = -1;
2934 ts->pids[i]->last_cc = -1;
2935 ts->pids[i]->last_pcr = -1;
2942 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2945 if (nb_packets != 0 && packet_num >= nb_packets ||
2946 ts->stop_parse > 1) {
2947 ret = AVERROR(EAGAIN);
2950 if (ts->stop_parse > 0)
2953 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2956 ret = handle_packet(ts, data, avio_tell(s->pb));
2957 finished_reading_packet(s, ts->raw_packet_size);
2961 ts->last_pos = avio_tell(s->pb);
2965 static int mpegts_probe(const AVProbeData *p)
2967 const int size = p->buf_size;
2971 int check_count = size / TS_FEC_PACKET_SIZE;
2972 #define CHECK_COUNT 10
2973 #define CHECK_BLOCK 100
2978 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2979 int left = FFMIN(check_count - i, CHECK_BLOCK);
2980 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2981 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2982 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2983 score = FFMAX3(score, dvhs_score, fec_score);
2985 maxscore = FFMAX(maxscore, score);
2988 sumscore = sumscore * CHECK_COUNT / check_count;
2989 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2991 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2993 if (check_count > CHECK_COUNT && sumscore > 6) {
2994 return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2995 } else if (check_count >= CHECK_COUNT && sumscore > 6) {
2996 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2997 } else if (check_count >= CHECK_COUNT && maxscore > 6) {
2998 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2999 } else if (sumscore > 6) {
3006 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
3007 * (-1) if not available */
3008 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
3010 int afc, len, flags;
3014 afc = (packet[3] >> 4) & 3;
3016 return AVERROR_INVALIDDATA;
3021 return AVERROR_INVALIDDATA;
3024 if (!(flags & 0x10))
3025 return AVERROR_INVALIDDATA;
3027 return AVERROR_INVALIDDATA;
3029 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
3030 *ppcr_low = ((p[4] & 1) << 8) | p[5];
3034 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
3036 /* NOTE: We attempt to seek on non-seekable files as well, as the
3037 * probe buffer usually is big enough. Only warn if the seek failed
3038 * on files where the seek should work. */
3039 if (avio_seek(pb, pos, SEEK_SET) < 0)
3040 av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
3043 static int mpegts_read_header(AVFormatContext *s)
3045 MpegTSContext *ts = s->priv_data;
3046 AVIOContext *pb = s->pb;
3047 int64_t pos, probesize = s->probesize;
3048 int64_t seekback = FFMAX(s->probesize, (int64_t)ts->resync_size + PROBE_PACKET_MAX_BUF);
3050 s->internal->prefer_codec_framerate = 1;
3052 if (ffio_ensure_seekback(pb, seekback) < 0)
3053 av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
3055 pos = avio_tell(pb);
3056 ts->raw_packet_size = get_packet_size(s);
3057 if (ts->raw_packet_size <= 0) {
3058 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
3059 ts->raw_packet_size = TS_PACKET_SIZE;
3064 if (s->iformat == &ff_mpegts_demuxer) {
3067 /* first do a scan to get all the services */
3068 seek_back(s, pb, pos);
3070 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3071 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3072 mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
3074 handle_packets(ts, probesize / ts->raw_packet_size);
3075 /* if could not find service, enable auto_guess */
3079 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
3081 s->ctx_flags |= AVFMTCTX_NOHEADER;
3084 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
3085 int64_t pcrs[2], pcr_h;
3086 uint8_t packet[TS_PACKET_SIZE];
3087 const uint8_t *data;
3089 /* only read packets */
3091 st = avformat_new_stream(s, NULL);
3093 return AVERROR(ENOMEM);
3094 avpriv_set_pts_info(st, 60, 1, 27000000);
3095 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
3096 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
3098 /* we iterate until we find two PCRs to estimate the bitrate */
3103 ret = read_packet(s, packet, ts->raw_packet_size, &data);
3106 pid = AV_RB16(data + 1) & 0x1fff;
3107 if ((pcr_pid == -1 || pcr_pid == pid) &&
3108 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
3109 finished_reading_packet(s, ts->raw_packet_size);
3111 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
3114 if (pcrs[1] - pcrs[0] > 0) {
3115 /* the difference needs to be positive to make sense for bitrate computation */
3118 av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
3124 finished_reading_packet(s, ts->raw_packet_size);
3129 /* NOTE1: the bitrate is computed without the FEC */
3130 /* NOTE2: it is only the bitrate of the start of the stream */
3131 ts->pcr_incr = pcrs[1] - pcrs[0];
3132 ts->cur_pcr = pcrs[0] - ts->pcr_incr * (nb_packets - 1);
3133 s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
3134 st->codecpar->bit_rate = s->bit_rate;
3135 st->start_time = ts->cur_pcr;
3136 av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%"PRId64"\n",
3137 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
3140 seek_back(s, pb, pos);
3144 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
3146 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
3148 MpegTSContext *ts = s->priv_data;
3150 int64_t pcr_h, next_pcr_h, pos;
3151 int pcr_l, next_pcr_l;
3152 uint8_t pcr_buf[12];
3153 const uint8_t *data;
3155 if ((ret = av_new_packet(pkt, TS_PACKET_SIZE)) < 0)
3157 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
3158 pkt->pos = avio_tell(s->pb);
3162 if (data != pkt->data)
3163 memcpy(pkt->data, data, TS_PACKET_SIZE);
3164 finished_reading_packet(s, ts->raw_packet_size);
3165 if (ts->mpeg2ts_compute_pcr) {
3166 /* compute exact PCR for each packet */
3167 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
3168 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
3169 pos = avio_tell(s->pb);
3170 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
3171 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
3172 avio_read(s->pb, pcr_buf, 12);
3173 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
3174 /* XXX: not precise enough */
3176 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
3181 avio_seek(s->pb, pos, SEEK_SET);
3182 /* no next PCR found: we use previous increment */
3183 ts->cur_pcr = pcr_h * 300 + pcr_l;
3185 pkt->pts = ts->cur_pcr;
3186 pkt->duration = ts->pcr_incr;
3187 ts->cur_pcr += ts->pcr_incr;
3189 pkt->stream_index = 0;
3193 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
3195 MpegTSContext *ts = s->priv_data;
3200 ret = handle_packets(ts, 0);
3202 av_packet_unref(ts->pkt);
3203 /* flush pes data left */
3204 for (i = 0; i < NB_PID_MAX; i++)
3205 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
3206 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3207 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
3208 ret = new_pes_packet(pes, pkt);
3211 pes->state = MPEGTS_SKIP;
3218 if (!ret && pkt->size < 0)
3219 ret = AVERROR_INVALIDDATA;
3223 static void mpegts_free(MpegTSContext *ts)
3229 for (i = 0; i < FF_ARRAY_ELEMS(ts->pools); i++)
3230 av_buffer_pool_uninit(&ts->pools[i]);
3232 for (i = 0; i < NB_PID_MAX; i++)
3234 mpegts_close_filter(ts, ts->pids[i]);
3237 static int mpegts_read_close(AVFormatContext *s)
3239 MpegTSContext *ts = s->priv_data;
3244 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3245 int64_t *ppos, int64_t pos_limit)
3247 MpegTSContext *ts = s->priv_data;
3248 int64_t pos, timestamp;
3249 uint8_t buf[TS_PACKET_SIZE];
3250 int pcr_l, pcr_pid =
3251 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3252 int pos47 = ts->pos47_full % ts->raw_packet_size;
3254 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3255 ts->raw_packet_size + pos47;
3256 while(pos < pos_limit) {
3257 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3258 return AV_NOPTS_VALUE;
3259 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3260 return AV_NOPTS_VALUE;
3261 if (buf[0] != 0x47) {
3262 if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3263 return AV_NOPTS_VALUE;
3264 pos = avio_tell(s->pb);
3267 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3268 parse_pcr(×tamp, &pcr_l, buf) == 0) {
3272 pos += ts->raw_packet_size;
3275 return AV_NOPTS_VALUE;
3278 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3279 int64_t *ppos, int64_t pos_limit)
3281 MpegTSContext *ts = s->priv_data;
3283 int pos47 = ts->pos47_full % ts->raw_packet_size;
3284 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3285 ff_read_frame_flush(s);
3286 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3287 return AV_NOPTS_VALUE;
3288 while(pos < pos_limit) {
3291 av_init_packet(&pkt);
3292 ret = av_read_frame(s, &pkt);
3294 return AV_NOPTS_VALUE;
3295 if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
3296 ff_reduce_index(s, pkt.stream_index);
3297 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3298 if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
3299 int64_t dts = pkt.dts;
3301 av_packet_unref(&pkt);
3306 av_packet_unref(&pkt);
3309 return AV_NOPTS_VALUE;
3312 /**************************************************************/
3313 /* parsing functions - called from other demuxers such as RTP */
3315 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
3319 ts = av_mallocz(sizeof(MpegTSContext));
3322 /* no stream case, currently used by RTP */
3323 ts->raw_packet_size = TS_PACKET_SIZE;
3327 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3328 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3329 mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
3334 /* return the consumed length if a packet was output, or -1 if no
3335 * packet is output */
3336 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
3337 const uint8_t *buf, int len)
3345 if (len < TS_PACKET_SIZE)
3346 return AVERROR_INVALIDDATA;
3347 if (buf[0] != 0x47) {
3351 handle_packet(ts, buf, len1 - len + TS_PACKET_SIZE);
3352 buf += TS_PACKET_SIZE;
3353 len -= TS_PACKET_SIZE;
3354 if (ts->stop_parse == 1)
3361 void avpriv_mpegts_parse_close(MpegTSContext *ts)
3367 AVInputFormat ff_mpegts_demuxer = {
3369 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3370 .priv_data_size = sizeof(MpegTSContext),
3371 .read_probe = mpegts_probe,
3372 .read_header = mpegts_read_header,
3373 .read_packet = mpegts_read_packet,
3374 .read_close = mpegts_read_close,
3375 .read_timestamp = mpegts_get_dts,
3376 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3377 .priv_class = &mpegts_class,
3380 AVInputFormat ff_mpegtsraw_demuxer = {
3381 .name = "mpegtsraw",
3382 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3383 .priv_data_size = sizeof(MpegTSContext),
3384 .read_header = mpegts_read_header,
3385 .read_packet = mpegts_raw_read_packet,
3386 .read_close = mpegts_read_close,
3387 .read_timestamp = mpegts_get_dts,
3388 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3389 .priv_class = &mpegtsraw_class,