2 * MPEG2 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"
41 /* maximum size in which we look for synchronisation if
42 * synchronisation is lost */
43 #define MAX_RESYNC_SIZE 65536
45 #define MAX_PES_PAYLOAD 200 * 1024
47 #define MAX_MP4_DESCR_COUNT 16
49 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
51 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
52 (modulus) = (dividend) % (divisor); \
53 (prev_dividend) = (dividend); \
56 enum MpegTSFilterType {
62 typedef struct MpegTSFilter MpegTSFilter;
64 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
65 int is_start, int64_t pos);
67 typedef struct MpegTSPESFilter {
72 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
74 typedef void SetServiceCallback (void *opaque, int ret);
76 typedef struct MpegTSSectionFilter {
83 unsigned int check_crc : 1;
84 unsigned int end_of_section_reached : 1;
85 SectionCallback *section_cb;
87 } MpegTSSectionFilter;
92 int last_cc; /* last cc code (-1 if first packet) */
94 enum MpegTSFilterType type;
96 MpegTSPESFilter pes_filter;
97 MpegTSSectionFilter section_filter;
101 #define MAX_PIDS_PER_PROGRAM 64
103 unsigned int id; // program id/service id
104 unsigned int nb_pids;
105 unsigned int pids[MAX_PIDS_PER_PROGRAM];
107 /** have we found pmt for this program */
111 struct MpegTSContext {
112 const AVClass *class;
114 AVFormatContext *stream;
115 /** raw packet size, including FEC if present */
120 #define SIZE_STAT_THRESHOLD 10
124 /** if true, all pids are analyzed to find streams */
127 /** compute exact PCR for each transport stream packet */
128 int mpeg2ts_compute_pcr;
130 /** fix dvb teletext pts */
131 int fix_teletext_pts;
133 int64_t cur_pcr; /**< used to estimate the exact PCR */
134 int pcr_incr; /**< used to estimate the exact PCR */
136 /* data needed to handle file based ts */
137 /** stop parsing loop */
139 /** packet containing Audio/Video data */
141 /** to detect seek */
151 /******************************************/
152 /* private mpegts data */
154 /** structure to keep track of Program->pids mapping */
158 int8_t crc_validity[NB_PID_MAX];
159 /** filters for various streams specified by PMT + for the PAT and PMT */
160 MpegTSFilter *pids[NB_PID_MAX];
164 #define MPEGTS_OPTIONS \
165 { "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 }
167 static const AVOption options[] = {
169 {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
170 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
171 {"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
172 {.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
173 {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
174 { .i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
175 {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
176 {.i64 = 0}, 0, 1, 0 },
177 {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
178 {.i64 = 0}, 0, 1, 0 },
182 static const AVClass mpegts_class = {
183 .class_name = "mpegts demuxer",
184 .item_name = av_default_item_name,
186 .version = LIBAVUTIL_VERSION_INT,
189 static const AVOption raw_options[] = {
191 { "compute_pcr", "compute exact PCR for each transport stream packet",
192 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
193 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
194 { "ts_packetsize", "output option carrying the raw packet size",
195 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
197 AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
201 static const AVClass mpegtsraw_class = {
202 .class_name = "mpegtsraw demuxer",
203 .item_name = av_default_item_name,
204 .option = raw_options,
205 .version = LIBAVUTIL_VERSION_INT,
208 /* TS stream handling */
213 MPEGTS_PESHEADER_FILL,
218 /* enough for PES header + length */
219 #define PES_START_SIZE 6
220 #define PES_HEADER_SIZE 9
221 #define MAX_PES_HEADER_SIZE (9 + 255)
223 typedef struct PESContext {
225 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
228 AVFormatContext *stream;
230 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
231 enum MpegTSState state;
232 /* used to get the format */
234 int flags; /**< copied to the AVPacket flags */
237 int extended_stream_id;
240 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
241 uint8_t header[MAX_PES_HEADER_SIZE];
246 extern AVInputFormat ff_mpegts_demuxer;
248 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
251 for (i = 0; i < ts->nb_prg; i++) {
252 if (ts->prg[i].id == programid) {
259 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
261 AVProgram *prg = NULL;
264 for (i = 0; i < ts->stream->nb_programs; i++)
265 if (ts->stream->programs[i]->id == programid) {
266 prg = ts->stream->programs[i];
271 prg->nb_stream_indexes = 0;
274 static void clear_program(MpegTSContext *ts, unsigned int programid)
278 clear_avprogram(ts, programid);
279 for (i = 0; i < ts->nb_prg; i++)
280 if (ts->prg[i].id == programid) {
281 ts->prg[i].nb_pids = 0;
282 ts->prg[i].pmt_found = 0;
286 static void clear_programs(MpegTSContext *ts)
292 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
295 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
299 p = &ts->prg[ts->nb_prg];
306 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
309 struct Program *p = get_program(ts, programid);
314 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
317 for (i = 0; i < p->nb_pids; i++)
318 if (p->pids[i] == pid)
321 p->pids[p->nb_pids++] = pid;
324 static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
326 struct Program *p = get_program(ts, programid);
333 static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
336 for (i = 0; i < s->nb_programs; i++) {
337 if (s->programs[i]->id == programid) {
338 s->programs[i]->pcr_pid = pid;
345 * @brief discard_pid() decides if the pid is to be discarded according
346 * to caller's programs selection
347 * @param ts : - TS context
349 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
352 static int discard_pid(MpegTSContext *ts, unsigned int pid)
355 int used = 0, discarded = 0;
358 /* If none of the programs have .discard=AVDISCARD_ALL then there's
359 * no way we have to discard this packet */
360 for (k = 0; k < ts->stream->nb_programs; k++)
361 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
363 if (k == ts->stream->nb_programs)
366 for (i = 0; i < ts->nb_prg; i++) {
368 for (j = 0; j < p->nb_pids; j++) {
369 if (p->pids[j] != pid)
371 // is program with id p->id set to be discarded?
372 for (k = 0; k < ts->stream->nb_programs; k++) {
373 if (ts->stream->programs[k]->id == p->id) {
374 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
383 return !used && discarded;
387 * Assemble PES packets out of TS packets, and then call the "section_cb"
388 * function when they are complete.
390 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
391 const uint8_t *buf, int buf_size, int is_start)
393 MpegTSSectionFilter *tss = &tss1->u.section_filter;
397 memcpy(tss->section_buf, buf, buf_size);
398 tss->section_index = buf_size;
399 tss->section_h_size = -1;
400 tss->end_of_section_reached = 0;
402 if (tss->end_of_section_reached)
404 len = 4096 - tss->section_index;
407 memcpy(tss->section_buf + tss->section_index, buf, len);
408 tss->section_index += len;
411 /* compute section length if possible */
412 if (tss->section_h_size == -1 && tss->section_index >= 3) {
413 len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
416 tss->section_h_size = len;
419 if (tss->section_h_size != -1 &&
420 tss->section_index >= tss->section_h_size) {
422 tss->end_of_section_reached = 1;
424 if (tss->check_crc) {
425 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, tss->section_buf, tss->section_h_size);
426 if (tss->section_h_size >= 4)
427 tss->crc = AV_RB32(tss->section_buf + tss->section_h_size - 4);
430 ts->crc_validity[ tss1->pid ] = 100;
431 }else if (ts->crc_validity[ tss1->pid ] > -10) {
432 ts->crc_validity[ tss1->pid ]--;
437 tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
444 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
445 enum MpegTSFilterType type)
447 MpegTSFilter *filter;
449 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x\n", pid);
451 if (pid >= NB_PID_MAX || ts->pids[pid])
453 filter = av_mallocz(sizeof(MpegTSFilter));
456 ts->pids[pid] = filter;
461 filter->last_cc = -1;
462 filter->last_pcr= -1;
467 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
469 SectionCallback *section_cb,
473 MpegTSFilter *filter;
474 MpegTSSectionFilter *sec;
476 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
478 sec = &filter->u.section_filter;
479 sec->section_cb = section_cb;
480 sec->opaque = opaque;
481 sec->section_buf = av_malloc(MAX_SECTION_SIZE);
482 sec->check_crc = check_crc;
485 if (!sec->section_buf) {
492 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
496 MpegTSFilter *filter;
497 MpegTSPESFilter *pes;
499 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
502 pes = &filter->u.pes_filter;
503 pes->pes_cb = pes_cb;
504 pes->opaque = opaque;
508 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
510 return mpegts_open_filter(ts, pid, MPEGTS_PCR);
513 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
518 if (filter->type == MPEGTS_SECTION)
519 av_freep(&filter->u.section_filter.section_buf);
520 else if (filter->type == MPEGTS_PES) {
521 PESContext *pes = filter->u.pes_filter.opaque;
522 av_buffer_unref(&pes->buffer);
523 /* referenced private data will be freed later in
524 * avformat_close_input */
525 if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
526 av_freep(&filter->u.pes_filter.opaque);
531 ts->pids[pid] = NULL;
534 static int analyze(const uint8_t *buf, int size, int packet_size, int *index,
537 int stat[TS_MAX_PACKET_SIZE];
542 memset(stat, 0, packet_size * sizeof(*stat));
544 for (i = 0; i < size - 3; i++) {
545 if (buf[i] == 0x47 &&
546 (!probe || (!(buf[i + 1] & 0x80) && buf[i + 3] != 0x47))) {
547 int x = i % packet_size;
550 if (stat[x] > best_score) {
551 best_score = stat[x];
558 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
561 /* autodetect fec presence. Must have at least 1024 bytes */
562 static int get_packet_size(const uint8_t *buf, int size)
564 int score, fec_score, dvhs_score;
566 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
567 return AVERROR_INVALIDDATA;
569 score = analyze(buf, size, TS_PACKET_SIZE, NULL, 0);
570 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL, 0);
571 fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, NULL, 0);
572 av_log(NULL, AV_LOG_TRACE, "score: %d, dvhs_score: %d, fec_score: %d \n",
573 score, dvhs_score, fec_score);
575 if (score > fec_score && score > dvhs_score)
576 return TS_PACKET_SIZE;
577 else if (dvhs_score > score && dvhs_score > fec_score)
578 return TS_DVHS_PACKET_SIZE;
579 else if (score < fec_score && dvhs_score < fec_score)
580 return TS_FEC_PACKET_SIZE;
582 return AVERROR_INVALIDDATA;
585 typedef struct SectionHeader {
590 uint8_t last_sec_num;
593 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
595 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
598 tssf->last_ver = h->version;
599 tssf->last_crc = tssf->crc;
604 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
611 return AVERROR_INVALIDDATA;
617 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
624 return AVERROR_INVALIDDATA;
631 /* read and allocate a DVB string preceded by its length */
632 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
639 len = get8(&p, p_end);
644 str = av_malloc(len + 1);
654 static int parse_section_header(SectionHeader *h,
655 const uint8_t **pp, const uint8_t *p_end)
659 val = get8(pp, p_end);
664 val = get16(pp, p_end);
668 val = get8(pp, p_end);
671 h->version = (val >> 1) & 0x1f;
672 val = get8(pp, p_end);
676 val = get8(pp, p_end);
679 h->last_sec_num = val;
683 typedef struct StreamType {
684 uint32_t stream_type;
685 enum AVMediaType codec_type;
686 enum AVCodecID codec_id;
689 static const StreamType ISO_types[] = {
690 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
691 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
692 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
693 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
694 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
695 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
696 /* Makito encoder sets stream type 0x11 for AAC,
697 * so auto-detect LOAS/LATM instead of hardcoding it. */
698 #if !CONFIG_LOAS_DEMUXER
699 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
701 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
702 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
703 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
704 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
705 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
706 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
707 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
711 static const StreamType HDMV_types[] = {
712 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
713 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
714 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
715 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
716 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
717 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
718 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
719 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
720 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
721 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
722 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
727 static const StreamType MISC_types[] = {
728 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
729 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
733 static const StreamType REGD_types[] = {
734 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
735 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
736 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
737 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
738 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
739 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
740 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
741 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
742 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
743 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
747 static const StreamType METADATA_types[] = {
748 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
749 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
753 /* descriptor present */
754 static const StreamType DESC_types[] = {
755 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
756 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
757 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
758 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
759 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
763 static void mpegts_find_stream_type(AVStream *st,
764 uint32_t stream_type,
765 const StreamType *types)
767 if (avcodec_is_open(st->codec)) {
768 av_log(NULL, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
772 for (; types->stream_type; types++)
773 if (stream_type == types->stream_type) {
774 st->codec->codec_type = types->codec_type;
775 st->codec->codec_id = types->codec_id;
776 st->request_probe = 0;
781 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
782 uint32_t stream_type, uint32_t prog_reg_desc)
784 int old_codec_type = st->codec->codec_type;
785 int old_codec_id = st->codec->codec_id;
787 if (avcodec_is_open(st->codec)) {
788 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
792 avpriv_set_pts_info(st, 33, 1, 90000);
794 st->codec->codec_type = AVMEDIA_TYPE_DATA;
795 st->codec->codec_id = AV_CODEC_ID_NONE;
796 st->need_parsing = AVSTREAM_PARSE_FULL;
798 pes->stream_type = stream_type;
800 av_log(pes->stream, AV_LOG_DEBUG,
801 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
802 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
804 st->codec->codec_tag = pes->stream_type;
806 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
807 if (pes->stream_type == 4)
808 st->request_probe = 50;
809 if ((prog_reg_desc == AV_RL32("HDMV") ||
810 prog_reg_desc == AV_RL32("HDPR")) &&
811 st->codec->codec_id == AV_CODEC_ID_NONE) {
812 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
813 if (pes->stream_type == 0x83) {
814 // HDMV TrueHD streams also contain an AC3 coded version of the
815 // audio track - add a second stream for this
817 // priv_data cannot be shared between streams
818 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
820 return AVERROR(ENOMEM);
821 memcpy(sub_pes, pes, sizeof(*sub_pes));
823 sub_st = avformat_new_stream(pes->stream, NULL);
826 return AVERROR(ENOMEM);
829 sub_st->id = pes->pid;
830 avpriv_set_pts_info(sub_st, 33, 1, 90000);
831 sub_st->priv_data = sub_pes;
832 sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
833 sub_st->codec->codec_id = AV_CODEC_ID_AC3;
834 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
835 sub_pes->sub_st = pes->sub_st = sub_st;
838 if (st->codec->codec_id == AV_CODEC_ID_NONE)
839 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
840 if (st->codec->codec_id == AV_CODEC_ID_NONE) {
841 st->codec->codec_id = old_codec_id;
842 st->codec->codec_type = old_codec_type;
844 if ((st->codec->codec_id == AV_CODEC_ID_NONE ||
845 (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
846 !avcodec_is_open(st->codec) &&
847 st->probe_packets > 0 &&
848 stream_type == STREAM_TYPE_PRIVATE_DATA) {
849 st->codec->codec_type = AVMEDIA_TYPE_DATA;
850 st->codec->codec_id = AV_CODEC_ID_BIN_DATA;
851 st->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
857 static void reset_pes_packet_state(PESContext *pes)
859 pes->pts = AV_NOPTS_VALUE;
860 pes->dts = AV_NOPTS_VALUE;
863 av_buffer_unref(&pes->buffer);
866 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
872 pkt->buf = pes->buffer;
873 pkt->data = pes->buffer->data;
874 pkt->size = pes->data_index;
876 if (pes->total_size != MAX_PES_PAYLOAD &&
877 pes->pes_header_size + pes->data_index != pes->total_size +
879 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
880 pes->flags |= AV_PKT_FLAG_CORRUPT;
882 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
884 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
885 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
886 pkt->stream_index = pes->sub_st->index;
888 pkt->stream_index = pes->st->index;
891 /* store position of first TS packet of this PES packet */
892 pkt->pos = pes->ts_packet_pos;
893 pkt->flags = pes->flags;
896 reset_pes_packet_state(pes);
898 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
900 return AVERROR(ENOMEM);
901 *sd = pes->stream_id;
906 static uint64_t get_ts64(GetBitContext *gb, int bits)
908 if (get_bits_left(gb) < bits)
909 return AV_NOPTS_VALUE;
910 return get_bits64(gb, bits);
913 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
914 const uint8_t *buf, int buf_size)
917 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
918 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
919 int dts_flag = -1, cts_flag = -1;
920 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
921 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
922 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
924 memcpy(buf_padded, buf, buf_padded_size);
926 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
928 if (sl->use_au_start)
929 au_start_flag = get_bits1(&gb);
931 au_end_flag = get_bits1(&gb);
932 if (!sl->use_au_start && !sl->use_au_end)
933 au_start_flag = au_end_flag = 1;
935 ocr_flag = get_bits1(&gb);
937 idle_flag = get_bits1(&gb);
939 padding_flag = get_bits1(&gb);
941 padding_bits = get_bits(&gb, 3);
943 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
944 if (sl->packet_seq_num_len)
945 skip_bits_long(&gb, sl->packet_seq_num_len);
946 if (sl->degr_prior_len)
948 skip_bits(&gb, sl->degr_prior_len);
950 skip_bits_long(&gb, sl->ocr_len);
952 if (sl->use_rand_acc_pt)
954 if (sl->au_seq_num_len > 0)
955 skip_bits_long(&gb, sl->au_seq_num_len);
956 if (sl->use_timestamps) {
957 dts_flag = get_bits1(&gb);
958 cts_flag = get_bits1(&gb);
961 if (sl->inst_bitrate_len)
962 inst_bitrate_flag = get_bits1(&gb);
964 dts = get_ts64(&gb, sl->timestamp_len);
966 cts = get_ts64(&gb, sl->timestamp_len);
968 skip_bits_long(&gb, sl->au_len);
969 if (inst_bitrate_flag)
970 skip_bits_long(&gb, sl->inst_bitrate_len);
973 if (dts != AV_NOPTS_VALUE)
975 if (cts != AV_NOPTS_VALUE)
978 if (sl->timestamp_len && sl->timestamp_res)
979 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
981 return (get_bits_count(&gb) + 7) >> 3;
984 /* return non zero if a packet could be constructed */
985 static int mpegts_push_data(MpegTSFilter *filter,
986 const uint8_t *buf, int buf_size, int is_start,
989 PESContext *pes = filter->u.pes_filter.opaque;
990 MpegTSContext *ts = pes->ts;
998 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
999 ret = new_pes_packet(pes, ts->pkt);
1004 reset_pes_packet_state(pes);
1006 pes->state = MPEGTS_HEADER;
1007 pes->ts_packet_pos = pos;
1010 while (buf_size > 0) {
1011 switch (pes->state) {
1013 len = PES_START_SIZE - pes->data_index;
1016 memcpy(pes->header + pes->data_index, p, len);
1017 pes->data_index += len;
1020 if (pes->data_index == PES_START_SIZE) {
1021 /* we got all the PES or section header. We can now
1023 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1024 pes->header[2] == 0x01) {
1025 /* it must be an mpeg2 PES stream */
1026 code = pes->header[3] | 0x100;
1027 av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1029 pes->stream_id = pes->header[3];
1031 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1033 pes->sub_st->discard == AVDISCARD_ALL)) ||
1034 code == 0x1be) /* padding_stream */
1037 /* stream not present in PMT */
1039 if (ts->skip_changes)
1042 pes->st = avformat_new_stream(ts->stream, NULL);
1044 return AVERROR(ENOMEM);
1045 pes->st->id = pes->pid;
1046 mpegts_set_stream_info(pes->st, pes, 0, 0);
1049 pes->total_size = AV_RB16(pes->header + 4);
1050 /* NOTE: a zero total size means the PES size is
1052 if (!pes->total_size)
1053 pes->total_size = MAX_PES_PAYLOAD;
1055 /* allocate pes buffer */
1056 pes->buffer = av_buffer_alloc(pes->total_size +
1057 AV_INPUT_BUFFER_PADDING_SIZE);
1059 return AVERROR(ENOMEM);
1061 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1062 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1063 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1064 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1065 pes->state = MPEGTS_PESHEADER;
1066 if (pes->st->codec->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1067 av_log(pes->stream, AV_LOG_TRACE,
1068 "pid=%x stream_type=%x probing\n",
1071 pes->st->request_probe = 1;
1074 pes->pes_header_size = 6;
1075 pes->state = MPEGTS_PAYLOAD;
1076 pes->data_index = 0;
1079 /* otherwise, it should be a table */
1082 pes->state = MPEGTS_SKIP;
1087 /**********************************************/
1088 /* PES packing parsing */
1089 case MPEGTS_PESHEADER:
1090 len = PES_HEADER_SIZE - pes->data_index;
1092 return AVERROR_INVALIDDATA;
1095 memcpy(pes->header + pes->data_index, p, len);
1096 pes->data_index += len;
1099 if (pes->data_index == PES_HEADER_SIZE) {
1100 pes->pes_header_size = pes->header[8] + 9;
1101 pes->state = MPEGTS_PESHEADER_FILL;
1104 case MPEGTS_PESHEADER_FILL:
1105 len = pes->pes_header_size - pes->data_index;
1107 return AVERROR_INVALIDDATA;
1110 memcpy(pes->header + pes->data_index, p, len);
1111 pes->data_index += len;
1114 if (pes->data_index == pes->pes_header_size) {
1116 unsigned int flags, pes_ext, skip;
1118 flags = pes->header[7];
1119 r = pes->header + 9;
1120 pes->pts = AV_NOPTS_VALUE;
1121 pes->dts = AV_NOPTS_VALUE;
1122 if ((flags & 0xc0) == 0x80) {
1123 pes->dts = pes->pts = ff_parse_pes_pts(r);
1125 } else if ((flags & 0xc0) == 0xc0) {
1126 pes->pts = ff_parse_pes_pts(r);
1128 pes->dts = ff_parse_pes_pts(r);
1131 pes->extended_stream_id = -1;
1132 if (flags & 0x01) { /* PES extension */
1134 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1135 skip = (pes_ext >> 4) & 0xb;
1138 if ((pes_ext & 0x41) == 0x01 &&
1139 (r + 2) <= (pes->header + pes->pes_header_size)) {
1140 /* PES extension 2 */
1141 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1142 pes->extended_stream_id = r[1];
1146 /* we got the full header. We parse it and get the payload */
1147 pes->state = MPEGTS_PAYLOAD;
1148 pes->data_index = 0;
1149 if (pes->stream_type == 0x12 && buf_size > 0) {
1150 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1152 pes->pes_header_size += sl_header_bytes;
1153 p += sl_header_bytes;
1154 buf_size -= sl_header_bytes;
1156 if (pes->stream_type == 0x15 && buf_size >= 5) {
1157 /* skip metadata access unit header */
1158 pes->pes_header_size += 5;
1162 if ( pes->ts->fix_teletext_pts
1163 && ( pes->st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT
1164 || pes->st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1166 AVProgram *p = NULL;
1167 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1168 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1169 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1171 AVStream *st = NULL;
1172 if (f->type == MPEGTS_PES) {
1173 PESContext *pcrpes = f->u.pes_filter.opaque;
1176 } else if (f->type == MPEGTS_PCR) {
1178 for (i = 0; i < p->nb_stream_indexes; i++) {
1179 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1180 if (pst->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1184 if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1185 // teletext packets do not always have correct timestamps,
1186 // the standard says they should be handled after 40.6 ms at most,
1187 // and the pcr error to this packet should be no more than 100 ms.
1188 // TODO: we should interpolate the PCR, not just use the last one
1189 int64_t pcr = f->last_pcr / 300;
1190 pes->st->pts_wrap_reference = st->pts_wrap_reference;
1191 pes->st->pts_wrap_behavior = st->pts_wrap_behavior;
1192 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1193 pes->pts = pes->dts = pcr;
1194 } else if (pes->st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1195 pes->dts > pcr + 3654 + 9000) {
1196 pes->pts = pes->dts = pcr + 3654 + 9000;
1197 } else if (pes->st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1198 pes->dts > pcr + 10*90000) { //10sec
1199 pes->pts = pes->dts = pcr + 3654 + 9000;
1209 case MPEGTS_PAYLOAD:
1211 if (pes->data_index > 0 &&
1212 pes->data_index + buf_size > pes->total_size) {
1213 ret = new_pes_packet(pes, ts->pkt);
1216 pes->total_size = MAX_PES_PAYLOAD;
1217 pes->buffer = av_buffer_alloc(pes->total_size +
1218 AV_INPUT_BUFFER_PADDING_SIZE);
1220 return AVERROR(ENOMEM);
1222 } else if (pes->data_index == 0 &&
1223 buf_size > pes->total_size) {
1224 // pes packet size is < ts size packet and pes data is padded with 0xff
1225 // not sure if this is legal in ts but see issue #2392
1226 buf_size = pes->total_size;
1228 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1229 pes->data_index += buf_size;
1230 /* emit complete packets with known packet size
1231 * decreases demuxer delay for infrequent packets like subtitles from
1232 * a couple of seconds to milliseconds for properly muxed files.
1233 * total_size is the number of bytes following pes_packet_length
1234 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1235 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1236 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1238 ret = new_pes_packet(pes, ts->pkt);
1254 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1259 /* if no pid found, then add a pid context */
1260 pes = av_mallocz(sizeof(PESContext));
1264 pes->stream = ts->stream;
1266 pes->pcr_pid = pcr_pid;
1267 pes->state = MPEGTS_SKIP;
1268 pes->pts = AV_NOPTS_VALUE;
1269 pes->dts = AV_NOPTS_VALUE;
1270 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1279 typedef struct MP4DescrParseContext {
1283 Mp4Descr *active_descr;
1285 int max_descr_count;
1287 int predefined_SLConfigDescriptor_seen;
1288 } MP4DescrParseContext;
1290 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1291 const uint8_t *buf, unsigned size,
1292 Mp4Descr *descr, int max_descr_count)
1295 if (size > (1 << 30))
1296 return AVERROR_INVALIDDATA;
1298 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1299 NULL, NULL, NULL, NULL)) < 0)
1306 d->active_descr = NULL;
1307 d->max_descr_count = max_descr_count;
1312 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1314 int64_t new_off = avio_tell(pb);
1315 (*len) -= new_off - *off;
1319 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1322 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1325 int ret = parse_mp4_descr(d, off, len, 0);
1328 update_offsets(&d->pb, &off, &len);
1333 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1335 avio_rb16(&d->pb); // ID
1341 update_offsets(&d->pb, &off, &len);
1342 return parse_mp4_descr_arr(d, off, len);
1345 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1350 id_flags = avio_rb16(&d->pb);
1351 if (!(id_flags & 0x0020)) { // URL_Flag
1352 update_offsets(&d->pb, &off, &len);
1353 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1359 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1362 if (d->descr_count >= d->max_descr_count)
1363 return AVERROR_INVALIDDATA;
1364 ff_mp4_parse_es_descr(&d->pb, &es_id);
1365 d->active_descr = d->descr + (d->descr_count++);
1367 d->active_descr->es_id = es_id;
1368 update_offsets(&d->pb, &off, &len);
1369 parse_mp4_descr(d, off, len, MP4DecConfigDescrTag);
1370 update_offsets(&d->pb, &off, &len);
1372 parse_mp4_descr(d, off, len, MP4SLDescrTag);
1373 d->active_descr = NULL;
1377 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1380 Mp4Descr *descr = d->active_descr;
1382 return AVERROR_INVALIDDATA;
1383 d->active_descr->dec_config_descr = av_malloc(len);
1384 if (!descr->dec_config_descr)
1385 return AVERROR(ENOMEM);
1386 descr->dec_config_descr_len = len;
1387 avio_read(&d->pb, descr->dec_config_descr, len);
1391 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1393 Mp4Descr *descr = d->active_descr;
1396 return AVERROR_INVALIDDATA;
1398 predefined = avio_r8(&d->pb);
1401 int flags = avio_r8(&d->pb);
1402 descr->sl.use_au_start = !!(flags & 0x80);
1403 descr->sl.use_au_end = !!(flags & 0x40);
1404 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1405 descr->sl.use_padding = !!(flags & 0x08);
1406 descr->sl.use_timestamps = !!(flags & 0x04);
1407 descr->sl.use_idle = !!(flags & 0x02);
1408 descr->sl.timestamp_res = avio_rb32(&d->pb);
1410 descr->sl.timestamp_len = avio_r8(&d->pb);
1411 if (descr->sl.timestamp_len > 64) {
1412 avpriv_request_sample(NULL, "timestamp_len > 64");
1413 descr->sl.timestamp_len = 64;
1414 return AVERROR_PATCHWELCOME;
1416 descr->sl.ocr_len = avio_r8(&d->pb);
1417 descr->sl.au_len = avio_r8(&d->pb);
1418 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1419 lengths = avio_rb16(&d->pb);
1420 descr->sl.degr_prior_len = lengths >> 12;
1421 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1422 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1423 } else if (!d->predefined_SLConfigDescriptor_seen){
1424 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1425 d->predefined_SLConfigDescriptor_seen = 1;
1430 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1434 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1435 update_offsets(&d->pb, &off, &len);
1436 if (len < 0 || len1 > len || len1 <= 0) {
1437 av_log(d->s, AV_LOG_ERROR,
1438 "Tag %x length violation new length %d bytes remaining %d\n",
1440 return AVERROR_INVALIDDATA;
1443 if (d->level++ >= MAX_LEVEL) {
1444 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1448 if (target_tag && tag != target_tag) {
1449 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1456 parse_MP4IODescrTag(d, off, len1);
1459 parse_MP4ODescrTag(d, off, len1);
1462 parse_MP4ESDescrTag(d, off, len1);
1464 case MP4DecConfigDescrTag:
1465 parse_MP4DecConfigDescrTag(d, off, len1);
1468 parse_MP4SLDescrTag(d, off, len1);
1475 avio_seek(&d->pb, off + len1, SEEK_SET);
1479 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1480 Mp4Descr *descr, int *descr_count, int max_descr_count)
1482 MP4DescrParseContext d;
1485 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1489 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1491 *descr_count = d.descr_count;
1495 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1496 Mp4Descr *descr, int *descr_count, int max_descr_count)
1498 MP4DescrParseContext d;
1501 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1505 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1507 *descr_count = d.descr_count;
1511 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1514 MpegTSContext *ts = filter->u.section_filter.opaque;
1515 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1517 const uint8_t *p, *p_end;
1519 int mp4_descr_count = 0;
1520 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1522 AVFormatContext *s = ts->stream;
1524 p_end = section + section_len - 4;
1526 if (parse_section_header(&h, &p, p_end) < 0)
1528 if (h.tid != M4OD_TID)
1530 if (skip_identical(&h, tssf))
1533 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1534 MAX_MP4_DESCR_COUNT);
1536 for (pid = 0; pid < NB_PID_MAX; pid++) {
1539 for (i = 0; i < mp4_descr_count; i++) {
1542 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1544 if (ts->pids[pid]->type != MPEGTS_PES) {
1545 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1548 pes = ts->pids[pid]->u.pes_filter.opaque;
1553 pes->sl = mp4_descr[i].sl;
1555 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1556 mp4_descr[i].dec_config_descr_len, 0,
1557 NULL, NULL, NULL, NULL);
1558 ff_mp4_read_dec_config_descr(s, st, &pb);
1559 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1560 st->codec->extradata_size > 0)
1561 st->need_parsing = 0;
1562 if (st->codec->codec_id == AV_CODEC_ID_H264 &&
1563 st->codec->extradata_size > 0)
1564 st->need_parsing = 0;
1566 st->codec->codec_type = avcodec_get_type(st->codec->codec_id);
1569 for (i = 0; i < mp4_descr_count; i++)
1570 av_free(mp4_descr[i].dec_config_descr);
1573 static const uint8_t opus_coupled_stream_cnt[9] = {
1574 1, 0, 1, 1, 2, 2, 2, 3, 3
1577 static const uint8_t opus_stream_cnt[9] = {
1578 1, 1, 1, 2, 2, 3, 4, 4, 5,
1581 static const uint8_t opus_channel_map[8][8] = {
1589 { 0,6,1,2,3,4,5,7 },
1592 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1593 const uint8_t **pp, const uint8_t *desc_list_end,
1594 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1597 const uint8_t *desc_end;
1598 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1602 desc_tag = get8(pp, desc_list_end);
1604 return AVERROR_INVALIDDATA;
1605 desc_len = get8(pp, desc_list_end);
1607 return AVERROR_INVALIDDATA;
1608 desc_end = *pp + desc_len;
1609 if (desc_end > desc_list_end)
1610 return AVERROR_INVALIDDATA;
1612 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1614 if ((st->codec->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1615 stream_type == STREAM_TYPE_PRIVATE_DATA)
1616 mpegts_find_stream_type(st, desc_tag, DESC_types);
1619 case 0x1E: /* SL descriptor */
1620 desc_es_id = get16(pp, desc_end);
1623 if (ts && ts->pids[pid])
1624 ts->pids[pid]->es_id = desc_es_id;
1625 for (i = 0; i < mp4_descr_count; i++)
1626 if (mp4_descr[i].dec_config_descr_len &&
1627 mp4_descr[i].es_id == desc_es_id) {
1629 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1630 mp4_descr[i].dec_config_descr_len, 0,
1631 NULL, NULL, NULL, NULL);
1632 ff_mp4_read_dec_config_descr(fc, st, &pb);
1633 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1634 st->codec->extradata_size > 0)
1635 st->need_parsing = 0;
1636 if (st->codec->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1637 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1640 case 0x1F: /* FMC descriptor */
1641 if (get16(pp, desc_end) < 0)
1643 if (mp4_descr_count > 0 &&
1644 (st->codec->codec_id == AV_CODEC_ID_AAC_LATM ||
1645 (st->request_probe == 0 && st->codec->codec_id == AV_CODEC_ID_NONE) ||
1646 st->request_probe > 0) &&
1647 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1649 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1650 mp4_descr->dec_config_descr_len, 0,
1651 NULL, NULL, NULL, NULL);
1652 ff_mp4_read_dec_config_descr(fc, st, &pb);
1653 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1654 st->codec->extradata_size > 0) {
1655 st->request_probe = st->need_parsing = 0;
1656 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1660 case 0x56: /* DVB teletext descriptor */
1662 uint8_t *extradata = NULL;
1663 int language_count = desc_len / 5;
1665 if (desc_len > 0 && desc_len % 5 != 0)
1666 return AVERROR_INVALIDDATA;
1668 if (language_count > 0) {
1669 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1670 av_assert0(language_count <= sizeof(language) / 4);
1672 if (st->codec->extradata == NULL) {
1673 if (ff_alloc_extradata(st->codec, language_count * 2)) {
1674 return AVERROR(ENOMEM);
1678 if (st->codec->extradata_size < language_count * 2)
1679 return AVERROR_INVALIDDATA;
1681 extradata = st->codec->extradata;
1683 for (i = 0; i < language_count; i++) {
1684 language[i * 4 + 0] = get8(pp, desc_end);
1685 language[i * 4 + 1] = get8(pp, desc_end);
1686 language[i * 4 + 2] = get8(pp, desc_end);
1687 language[i * 4 + 3] = ',';
1689 memcpy(extradata, *pp, 2);
1695 language[i * 4 - 1] = 0;
1696 av_dict_set(&st->metadata, "language", language, 0);
1700 case 0x59: /* subtitling descriptor */
1702 /* 8 bytes per DVB subtitle substream data:
1703 * ISO_639_language_code (3 bytes),
1704 * subtitling_type (1 byte),
1705 * composition_page_id (2 bytes),
1706 * ancillary_page_id (2 bytes) */
1707 int language_count = desc_len / 8;
1709 if (desc_len > 0 && desc_len % 8 != 0)
1710 return AVERROR_INVALIDDATA;
1712 if (language_count > 1) {
1713 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1716 if (language_count > 0) {
1719 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1720 av_assert0(language_count <= sizeof(language) / 4);
1722 if (st->codec->extradata == NULL) {
1723 if (ff_alloc_extradata(st->codec, language_count * 5)) {
1724 return AVERROR(ENOMEM);
1728 if (st->codec->extradata_size < language_count * 5)
1729 return AVERROR_INVALIDDATA;
1731 extradata = st->codec->extradata;
1733 for (i = 0; i < language_count; i++) {
1734 language[i * 4 + 0] = get8(pp, desc_end);
1735 language[i * 4 + 1] = get8(pp, desc_end);
1736 language[i * 4 + 2] = get8(pp, desc_end);
1737 language[i * 4 + 3] = ',';
1739 /* hearing impaired subtitles detection using subtitling_type */
1741 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1742 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1743 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1744 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1745 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1746 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1747 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1751 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1752 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1758 language[i * 4 - 1] = 0;
1759 av_dict_set(&st->metadata, "language", language, 0);
1763 case 0x0a: /* ISO 639 language descriptor */
1764 for (i = 0; i + 4 <= desc_len; i += 4) {
1765 language[i + 0] = get8(pp, desc_end);
1766 language[i + 1] = get8(pp, desc_end);
1767 language[i + 2] = get8(pp, desc_end);
1768 language[i + 3] = ',';
1769 switch (get8(pp, desc_end)) {
1771 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1774 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1777 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1781 if (i && language[0]) {
1782 language[i - 1] = 0;
1783 av_dict_set(&st->metadata, "language", language, 0);
1786 case 0x05: /* registration descriptor */
1787 st->codec->codec_tag = bytestream_get_le32(pp);
1788 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codec->codec_tag);
1789 if (st->codec->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0)
1790 mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
1792 case 0x52: /* stream identifier descriptor */
1793 st->stream_identifier = 1 + get8(pp, desc_end);
1795 case 0x26: /* metadata descriptor */
1796 if (get16(pp, desc_end) == 0xFFFF)
1798 if (get8(pp, desc_end) == 0xFF) {
1799 st->codec->codec_tag = bytestream_get_le32(pp);
1800 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1801 mpegts_find_stream_type(st, st->codec->codec_tag, METADATA_types);
1804 case 0x7f: /* DVB extension descriptor */
1805 ext_desc_tag = get8(pp, desc_end);
1806 if (ext_desc_tag < 0)
1807 return AVERROR_INVALIDDATA;
1808 if (st->codec->codec_id == AV_CODEC_ID_OPUS &&
1809 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1810 if (!st->codec->extradata) {
1811 st->codec->extradata = av_mallocz(sizeof(opus_default_extradata) +
1812 AV_INPUT_BUFFER_PADDING_SIZE);
1813 if (!st->codec->extradata)
1814 return AVERROR(ENOMEM);
1816 st->codec->extradata_size = sizeof(opus_default_extradata);
1817 memcpy(st->codec->extradata, opus_default_extradata, sizeof(opus_default_extradata));
1819 channel_config_code = get8(pp, desc_end);
1820 if (channel_config_code < 0)
1821 return AVERROR_INVALIDDATA;
1822 if (channel_config_code <= 0x8) {
1823 st->codec->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1824 st->codec->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
1825 st->codec->extradata[19] = opus_stream_cnt[channel_config_code];
1826 st->codec->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1827 memcpy(&st->codec->extradata[21], opus_channel_map[channels - 1], channels);
1829 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1831 st->need_parsing = AVSTREAM_PARSE_FULL;
1842 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1844 MpegTSContext *ts = filter->u.section_filter.opaque;
1845 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1846 SectionHeader h1, *h = &h1;
1849 const uint8_t *p, *p_end, *desc_list_end;
1850 int program_info_length, pcr_pid, pid, stream_type;
1852 uint32_t prog_reg_desc = 0; /* registration descriptor */
1854 int mp4_descr_count = 0;
1855 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1858 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
1859 hex_dump_debug(ts->stream, section, section_len);
1861 p_end = section + section_len - 4;
1863 if (parse_section_header(h, &p, p_end) < 0)
1865 if (skip_identical(h, tssf))
1868 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d\n",
1869 h->id, h->sec_num, h->last_sec_num, h->version);
1871 if (h->tid != PMT_TID)
1873 if (!ts->scan_all_pmts && ts->skip_changes)
1876 if (!ts->skip_clear)
1877 clear_program(ts, h->id);
1879 pcr_pid = get16(&p, p_end);
1883 add_pid_to_pmt(ts, h->id, pcr_pid);
1884 set_pcr_pid(ts->stream, h->id, pcr_pid);
1886 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
1888 program_info_length = get16(&p, p_end);
1889 if (program_info_length < 0)
1891 program_info_length &= 0xfff;
1892 while (program_info_length >= 2) {
1894 tag = get8(&p, p_end);
1895 len = get8(&p, p_end);
1897 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
1899 if (len > program_info_length - 2)
1900 // something else is broken, exit the program_descriptors_loop
1902 program_info_length -= len + 2;
1903 if (tag == 0x1d) { // IOD descriptor
1904 get8(&p, p_end); // scope
1905 get8(&p, p_end); // label
1907 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
1908 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1909 } else if (tag == 0x05 && len >= 4) { // registration descriptor
1910 prog_reg_desc = bytestream_get_le32(&p);
1915 p += program_info_length;
1919 // stop parsing after pmt, we found header
1920 if (!ts->stream->nb_streams)
1923 set_pmt_found(ts, h->id);
1929 stream_type = get8(&p, p_end);
1930 if (stream_type < 0)
1932 pid = get16(&p, p_end);
1936 if (pid == ts->current_pid)
1939 /* now create stream */
1940 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
1941 pes = ts->pids[pid]->u.pes_filter.opaque;
1943 pes->st = avformat_new_stream(pes->stream, NULL);
1946 pes->st->id = pes->pid;
1949 } else if (stream_type != 0x13) {
1951 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
1952 pes = add_pes_stream(ts, pid, pcr_pid);
1954 st = avformat_new_stream(pes->stream, NULL);
1960 int idx = ff_find_stream_index(ts->stream, pid);
1962 st = ts->stream->streams[idx];
1964 st = avformat_new_stream(ts->stream, NULL);
1968 st->codec->codec_type = AVMEDIA_TYPE_DATA;
1975 if (pes && !pes->stream_type)
1976 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
1978 add_pid_to_pmt(ts, h->id, pid);
1980 av_program_add_stream_index(ts->stream, h->id, st->index);
1982 desc_list_len = get16(&p, p_end);
1983 if (desc_list_len < 0)
1985 desc_list_len &= 0xfff;
1986 desc_list_end = p + desc_list_len;
1987 if (desc_list_end > p_end)
1990 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
1991 desc_list_end, mp4_descr,
1992 mp4_descr_count, pid, ts) < 0)
1995 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
1996 stream_type == 0x83 && pes->sub_st) {
1997 av_program_add_stream_index(ts->stream, h->id,
1998 pes->sub_st->index);
1999 pes->sub_st->codec->codec_tag = st->codec->codec_tag;
2005 if (!ts->pids[pcr_pid])
2006 mpegts_open_pcr_filter(ts, pcr_pid);
2009 for (i = 0; i < mp4_descr_count; i++)
2010 av_free(mp4_descr[i].dec_config_descr);
2013 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2015 MpegTSContext *ts = filter->u.section_filter.opaque;
2016 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2017 SectionHeader h1, *h = &h1;
2018 const uint8_t *p, *p_end;
2022 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2023 hex_dump_debug(ts->stream, section, section_len);
2025 p_end = section + section_len - 4;
2027 if (parse_section_header(h, &p, p_end) < 0)
2029 if (h->tid != PAT_TID)
2031 if (ts->skip_changes)
2034 if (skip_identical(h, tssf))
2036 ts->stream->ts_id = h->id;
2040 sid = get16(&p, p_end);
2043 pmt_pid = get16(&p, p_end);
2048 if (pmt_pid == ts->current_pid)
2051 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2053 if (sid == 0x0000) {
2056 MpegTSFilter *fil = ts->pids[pmt_pid];
2057 program = av_new_program(ts->stream, sid);
2059 program->program_num = sid;
2060 program->pmt_pid = pmt_pid;
2063 if ( fil->type != MPEGTS_SECTION
2064 || fil->pid != pmt_pid
2065 || fil->u.section_filter.section_cb != pmt_cb)
2066 mpegts_close_filter(ts, ts->pids[pmt_pid]);
2068 if (!ts->pids[pmt_pid])
2069 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2070 add_pat_entry(ts, sid);
2071 add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2072 add_pid_to_pmt(ts, sid, pmt_pid);
2078 for (j=0; j<ts->stream->nb_programs; j++) {
2079 for (i = 0; i < ts->nb_prg; i++)
2080 if (ts->prg[i].id == ts->stream->programs[j]->id)
2082 if (i==ts->nb_prg && !ts->skip_clear)
2083 clear_avprogram(ts, ts->stream->programs[j]->id);
2088 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2090 MpegTSContext *ts = filter->u.section_filter.opaque;
2091 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2092 SectionHeader h1, *h = &h1;
2093 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2094 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2095 char *name, *provider_name;
2097 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2098 hex_dump_debug(ts->stream, section, section_len);
2100 p_end = section + section_len - 4;
2102 if (parse_section_header(h, &p, p_end) < 0)
2104 if (h->tid != SDT_TID)
2106 if (ts->skip_changes)
2108 if (skip_identical(h, tssf))
2111 onid = get16(&p, p_end);
2114 val = get8(&p, p_end);
2118 sid = get16(&p, p_end);
2121 val = get8(&p, p_end);
2124 desc_list_len = get16(&p, p_end);
2125 if (desc_list_len < 0)
2127 desc_list_len &= 0xfff;
2128 desc_list_end = p + desc_list_len;
2129 if (desc_list_end > p_end)
2132 desc_tag = get8(&p, desc_list_end);
2135 desc_len = get8(&p, desc_list_end);
2136 desc_end = p + desc_len;
2137 if (desc_len < 0 || desc_end > desc_list_end)
2140 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2141 desc_tag, desc_len);
2145 service_type = get8(&p, p_end);
2146 if (service_type < 0)
2148 provider_name = getstr8(&p, p_end);
2151 name = getstr8(&p, p_end);
2153 AVProgram *program = av_new_program(ts->stream, sid);
2155 av_dict_set(&program->metadata, "service_name", name, 0);
2156 av_dict_set(&program->metadata, "service_provider",
2161 av_free(provider_name);
2172 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2173 const uint8_t *packet);
2175 /* handle one TS packet */
2176 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2179 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2180 has_adaptation, has_payload;
2181 const uint8_t *p, *p_end;
2184 pid = AV_RB16(packet + 1) & 0x1fff;
2185 if (pid && discard_pid(ts, pid))
2187 is_start = packet[1] & 0x40;
2188 tss = ts->pids[pid];
2189 if (ts->auto_guess && !tss && is_start) {
2190 add_pes_stream(ts, pid, -1);
2191 tss = ts->pids[pid];
2195 ts->current_pid = pid;
2197 afc = (packet[3] >> 4) & 3;
2198 if (afc == 0) /* reserved value */
2200 has_adaptation = afc & 2;
2201 has_payload = afc & 1;
2202 is_discontinuity = has_adaptation &&
2203 packet[4] != 0 && /* with length > 0 */
2204 (packet[5] & 0x80); /* and discontinuity indicated */
2206 /* continuity check (currently not used) */
2207 cc = (packet[3] & 0xf);
2208 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2209 cc_ok = pid == 0x1FFF || // null packet PID
2216 av_log(ts->stream, AV_LOG_DEBUG,
2217 "Continuity check failed for pid %d expected %d got %d\n",
2218 pid, expected_cc, cc);
2219 if (tss->type == MPEGTS_PES) {
2220 PESContext *pc = tss->u.pes_filter.opaque;
2221 pc->flags |= AV_PKT_FLAG_CORRUPT;
2226 if (has_adaptation) {
2229 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2230 tss->last_pcr = pcr_h * 300 + pcr_l;
2231 /* skip adaptation field */
2234 /* if past the end of packet, ignore */
2235 p_end = packet + TS_PACKET_SIZE;
2236 if (p >= p_end || !has_payload)
2239 pos = avio_tell(ts->stream->pb);
2241 av_assert0(pos >= TS_PACKET_SIZE);
2242 ts->pos47_full = pos - TS_PACKET_SIZE;
2245 if (tss->type == MPEGTS_SECTION) {
2247 /* pointer field present */
2249 if (len > p_end - p)
2252 /* write remaining section bytes */
2253 write_section_data(ts, tss,
2255 /* check whether filter has been closed */
2261 write_section_data(ts, tss,
2266 write_section_data(ts, tss,
2271 // stop find_stream_info from waiting for more streams
2272 // when all programs have received a PMT
2273 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2275 for (i = 0; i < ts->nb_prg; i++) {
2276 if (!ts->prg[i].pmt_found)
2279 if (i == ts->nb_prg && ts->nb_prg > 0) {
2281 for (i = 0; i < ts->stream->nb_streams; i++) {
2282 AVStream *st = ts->stream->streams[i];
2283 types |= 1<<st->codec->codec_type;
2285 if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2286 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2287 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2294 // Note: The position here points actually behind the current packet.
2295 if (tss->type == MPEGTS_PES) {
2296 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2297 pos - ts->raw_packet_size)) < 0)
2305 static void reanalyze(MpegTSContext *ts) {
2306 AVIOContext *pb = ts->stream->pb;
2307 int64_t pos = avio_tell(pb);
2310 pos -= ts->pos47_full;
2311 if (pos == TS_PACKET_SIZE) {
2312 ts->size_stat[0] ++;
2313 } else if (pos == TS_DVHS_PACKET_SIZE) {
2314 ts->size_stat[1] ++;
2315 } else if (pos == TS_FEC_PACKET_SIZE) {
2316 ts->size_stat[2] ++;
2319 ts->size_stat_count ++;
2320 if (ts->size_stat_count > SIZE_STAT_THRESHOLD) {
2322 if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2323 newsize = TS_PACKET_SIZE;
2324 } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2325 newsize = TS_DVHS_PACKET_SIZE;
2326 } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2327 newsize = TS_FEC_PACKET_SIZE;
2329 if (newsize && newsize != ts->raw_packet_size) {
2330 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2331 ts->raw_packet_size = newsize;
2333 ts->size_stat_count = 0;
2334 memset(ts->size_stat, 0, sizeof(ts->size_stat));
2338 /* XXX: try to find a better synchro over several packets (use
2339 * get_packet_size() ?) */
2340 static int mpegts_resync(AVFormatContext *s)
2342 MpegTSContext *ts = s->priv_data;
2343 AVIOContext *pb = s->pb;
2346 for (i = 0; i < ts->resync_size; i++) {
2351 avio_seek(pb, -1, SEEK_CUR);
2352 reanalyze(s->priv_data);
2356 av_log(s, AV_LOG_ERROR,
2357 "max resync size reached, could not find sync byte\n");
2359 return AVERROR_INVALIDDATA;
2362 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2363 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2364 const uint8_t **data)
2366 AVIOContext *pb = s->pb;
2370 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2371 if (len != TS_PACKET_SIZE)
2372 return len < 0 ? len : AVERROR_EOF;
2373 /* check packet sync byte */
2374 if ((*data)[0] != 0x47) {
2375 /* find a new packet start */
2376 uint64_t pos = avio_tell(pb);
2377 avio_seek(pb, -FFMIN(raw_packet_size, pos), SEEK_CUR);
2379 if (mpegts_resync(s) < 0)
2380 return AVERROR(EAGAIN);
2390 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2392 AVIOContext *pb = s->pb;
2393 int skip = raw_packet_size - TS_PACKET_SIZE;
2395 avio_skip(pb, skip);
2398 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2400 AVFormatContext *s = ts->stream;
2401 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2402 const uint8_t *data;
2406 if (avio_tell(s->pb) != ts->last_pos) {
2408 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2409 /* seek detected, flush pes buffer */
2410 for (i = 0; i < NB_PID_MAX; i++) {
2412 if (ts->pids[i]->type == MPEGTS_PES) {
2413 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2414 av_buffer_unref(&pes->buffer);
2415 pes->data_index = 0;
2416 pes->state = MPEGTS_SKIP; /* skip until pes header */
2417 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2418 ts->pids[i]->u.section_filter.last_ver = -1;
2420 ts->pids[i]->last_cc = -1;
2421 ts->pids[i]->last_pcr = -1;
2428 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2431 if (nb_packets != 0 && packet_num >= nb_packets ||
2432 ts->stop_parse > 1) {
2433 ret = AVERROR(EAGAIN);
2436 if (ts->stop_parse > 0)
2439 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2442 ret = handle_packet(ts, data);
2443 finished_reading_packet(s, ts->raw_packet_size);
2447 ts->last_pos = avio_tell(s->pb);
2451 static int mpegts_probe(AVProbeData *p)
2453 const int size = p->buf_size;
2457 int check_count = size / TS_FEC_PACKET_SIZE;
2458 #define CHECK_COUNT 10
2459 #define CHECK_BLOCK 100
2461 if (check_count < CHECK_COUNT)
2464 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2465 int left = FFMIN(check_count - i, CHECK_BLOCK);
2466 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , NULL, 1);
2467 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, NULL, 1);
2468 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , NULL, 1);
2469 score = FFMAX3(score, dvhs_score, fec_score);
2471 maxscore = FFMAX(maxscore, score);
2474 sumscore = sumscore * CHECK_COUNT / check_count;
2475 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2477 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2479 if (sumscore > 6) return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2480 else if (maxscore > 6) return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2485 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2486 * (-1) if not available */
2487 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2489 int afc, len, flags;
2493 afc = (packet[3] >> 4) & 3;
2495 return AVERROR_INVALIDDATA;
2500 return AVERROR_INVALIDDATA;
2503 if (!(flags & 0x10))
2504 return AVERROR_INVALIDDATA;
2506 return AVERROR_INVALIDDATA;
2508 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2509 *ppcr_low = ((p[4] & 1) << 8) | p[5];
2513 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2515 /* NOTE: We attempt to seek on non-seekable files as well, as the
2516 * probe buffer usually is big enough. Only warn if the seek failed
2517 * on files where the seek should work. */
2518 if (avio_seek(pb, pos, SEEK_SET) < 0)
2519 av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2522 static int mpegts_read_header(AVFormatContext *s)
2524 MpegTSContext *ts = s->priv_data;
2525 AVIOContext *pb = s->pb;
2526 uint8_t buf[8 * 1024] = {0};
2528 int64_t pos, probesize = s->probesize;
2530 if (ffio_ensure_seekback(pb, probesize) < 0)
2531 av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2533 /* read the first 8192 bytes to get packet size */
2534 pos = avio_tell(pb);
2535 len = avio_read(pb, buf, sizeof(buf));
2536 ts->raw_packet_size = get_packet_size(buf, len);
2537 if (ts->raw_packet_size <= 0) {
2538 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2539 ts->raw_packet_size = TS_PACKET_SIZE;
2544 if (s->iformat == &ff_mpegts_demuxer) {
2547 /* first do a scan to get all the services */
2548 seek_back(s, pb, pos);
2550 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2552 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2554 handle_packets(ts, probesize / ts->raw_packet_size);
2555 /* if could not find service, enable auto_guess */
2559 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2561 s->ctx_flags |= AVFMTCTX_NOHEADER;
2564 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2565 int64_t pcrs[2], pcr_h;
2566 int packet_count[2];
2567 uint8_t packet[TS_PACKET_SIZE];
2568 const uint8_t *data;
2570 /* only read packets */
2572 st = avformat_new_stream(s, NULL);
2574 return AVERROR(ENOMEM);
2575 avpriv_set_pts_info(st, 60, 1, 27000000);
2576 st->codec->codec_type = AVMEDIA_TYPE_DATA;
2577 st->codec->codec_id = AV_CODEC_ID_MPEG2TS;
2579 /* we iterate until we find two PCRs to estimate the bitrate */
2584 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2587 pid = AV_RB16(data + 1) & 0x1fff;
2588 if ((pcr_pid == -1 || pcr_pid == pid) &&
2589 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2590 finished_reading_packet(s, ts->raw_packet_size);
2592 packet_count[nb_pcrs] = nb_packets;
2593 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2598 finished_reading_packet(s, ts->raw_packet_size);
2603 /* NOTE1: the bitrate is computed without the FEC */
2604 /* NOTE2: it is only the bitrate of the start of the stream */
2605 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2606 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2607 s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
2608 st->codec->bit_rate = s->bit_rate;
2609 st->start_time = ts->cur_pcr;
2610 av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
2611 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2614 seek_back(s, pb, pos);
2618 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2620 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
2622 MpegTSContext *ts = s->priv_data;
2624 int64_t pcr_h, next_pcr_h, pos;
2625 int pcr_l, next_pcr_l;
2626 uint8_t pcr_buf[12];
2627 const uint8_t *data;
2629 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2630 return AVERROR(ENOMEM);
2631 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2632 pkt->pos = avio_tell(s->pb);
2634 av_packet_unref(pkt);
2637 if (data != pkt->data)
2638 memcpy(pkt->data, data, ts->raw_packet_size);
2639 finished_reading_packet(s, ts->raw_packet_size);
2640 if (ts->mpeg2ts_compute_pcr) {
2641 /* compute exact PCR for each packet */
2642 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2643 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2644 pos = avio_tell(s->pb);
2645 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
2646 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2647 avio_read(s->pb, pcr_buf, 12);
2648 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2649 /* XXX: not precise enough */
2651 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2656 avio_seek(s->pb, pos, SEEK_SET);
2657 /* no next PCR found: we use previous increment */
2658 ts->cur_pcr = pcr_h * 300 + pcr_l;
2660 pkt->pts = ts->cur_pcr;
2661 pkt->duration = ts->pcr_incr;
2662 ts->cur_pcr += ts->pcr_incr;
2664 pkt->stream_index = 0;
2668 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
2670 MpegTSContext *ts = s->priv_data;
2675 ret = handle_packets(ts, 0);
2677 av_packet_unref(ts->pkt);
2678 /* flush pes data left */
2679 for (i = 0; i < NB_PID_MAX; i++)
2680 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2681 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2682 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2683 ret = new_pes_packet(pes, pkt);
2686 pes->state = MPEGTS_SKIP;
2693 if (!ret && pkt->size < 0)
2694 ret = AVERROR_INVALIDDATA;
2698 static void mpegts_free(MpegTSContext *ts)
2704 for (i = 0; i < NB_PID_MAX; i++)
2706 mpegts_close_filter(ts, ts->pids[i]);
2709 static int mpegts_read_close(AVFormatContext *s)
2711 MpegTSContext *ts = s->priv_data;
2716 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2717 int64_t *ppos, int64_t pos_limit)
2719 MpegTSContext *ts = s->priv_data;
2720 int64_t pos, timestamp;
2721 uint8_t buf[TS_PACKET_SIZE];
2722 int pcr_l, pcr_pid =
2723 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
2724 int pos47 = ts->pos47_full % ts->raw_packet_size;
2726 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
2727 ts->raw_packet_size + pos47;
2728 while(pos < pos_limit) {
2729 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2730 return AV_NOPTS_VALUE;
2731 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2732 return AV_NOPTS_VALUE;
2733 if (buf[0] != 0x47) {
2734 avio_seek(s->pb, -TS_PACKET_SIZE, SEEK_CUR);
2735 if (mpegts_resync(s) < 0)
2736 return AV_NOPTS_VALUE;
2737 pos = avio_tell(s->pb);
2740 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2741 parse_pcr(×tamp, &pcr_l, buf) == 0) {
2745 pos += ts->raw_packet_size;
2748 return AV_NOPTS_VALUE;
2751 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2752 int64_t *ppos, int64_t pos_limit)
2754 MpegTSContext *ts = s->priv_data;
2756 int pos47 = ts->pos47_full % ts->raw_packet_size;
2757 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
2758 ff_read_frame_flush(s);
2759 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2760 return AV_NOPTS_VALUE;
2761 while(pos < pos_limit) {
2764 av_init_packet(&pkt);
2765 ret = av_read_frame(s, &pkt);
2767 return AV_NOPTS_VALUE;
2768 if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
2769 ff_reduce_index(s, pkt.stream_index);
2770 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
2771 if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
2772 int64_t dts = pkt.dts;
2774 av_packet_unref(&pkt);
2779 av_packet_unref(&pkt);
2782 return AV_NOPTS_VALUE;
2785 /**************************************************************/
2786 /* parsing functions - called from other demuxers such as RTP */
2788 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
2792 ts = av_mallocz(sizeof(MpegTSContext));
2795 /* no stream case, currently used by RTP */
2796 ts->raw_packet_size = TS_PACKET_SIZE;
2799 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2800 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2805 /* return the consumed length if a packet was output, or -1 if no
2806 * packet is output */
2807 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
2808 const uint8_t *buf, int len)
2816 if (len < TS_PACKET_SIZE)
2817 return AVERROR_INVALIDDATA;
2818 if (buf[0] != 0x47) {
2822 handle_packet(ts, buf);
2823 buf += TS_PACKET_SIZE;
2824 len -= TS_PACKET_SIZE;
2825 if (ts->stop_parse == 1)
2832 void avpriv_mpegts_parse_close(MpegTSContext *ts)
2838 AVInputFormat ff_mpegts_demuxer = {
2840 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2841 .priv_data_size = sizeof(MpegTSContext),
2842 .read_probe = mpegts_probe,
2843 .read_header = mpegts_read_header,
2844 .read_packet = mpegts_read_packet,
2845 .read_close = mpegts_read_close,
2846 .read_timestamp = mpegts_get_dts,
2847 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2848 .priv_class = &mpegts_class,
2851 AVInputFormat ff_mpegtsraw_demuxer = {
2852 .name = "mpegtsraw",
2853 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
2854 .priv_data_size = sizeof(MpegTSContext),
2855 .read_header = mpegts_read_header,
2856 .read_packet = mpegts_raw_read_packet,
2857 .read_close = mpegts_read_close,
2858 .read_timestamp = mpegts_get_dts,
2859 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2860 .priv_class = &mpegtsraw_class,