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,
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 int pid = AV_RB16(buf+1) & 0x1FFF;
547 int asc = buf[i + 3] & 0x30;
548 if (!probe || pid == 0x1FFF || asc) {
549 int x = i % packet_size;
552 if (stat[x] > best_score) {
553 best_score = stat[x];
559 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
562 /* autodetect fec presence. Must have at least 1024 bytes */
563 static int get_packet_size(const uint8_t *buf, int size)
565 int score, fec_score, dvhs_score;
567 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
568 return AVERROR_INVALIDDATA;
570 score = analyze(buf, size, TS_PACKET_SIZE, 0);
571 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, 0);
572 fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, 0);
573 av_log(NULL, AV_LOG_TRACE, "score: %d, dvhs_score: %d, fec_score: %d \n",
574 score, dvhs_score, fec_score);
576 if (score > fec_score && score > dvhs_score)
577 return TS_PACKET_SIZE;
578 else if (dvhs_score > score && dvhs_score > fec_score)
579 return TS_DVHS_PACKET_SIZE;
580 else if (score < fec_score && dvhs_score < fec_score)
581 return TS_FEC_PACKET_SIZE;
583 return AVERROR_INVALIDDATA;
586 typedef struct SectionHeader {
591 uint8_t last_sec_num;
594 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
596 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
599 tssf->last_ver = h->version;
600 tssf->last_crc = tssf->crc;
605 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
612 return AVERROR_INVALIDDATA;
618 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
625 return AVERROR_INVALIDDATA;
632 /* read and allocate a DVB string preceded by its length */
633 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
640 len = get8(&p, p_end);
645 str = av_malloc(len + 1);
655 static int parse_section_header(SectionHeader *h,
656 const uint8_t **pp, const uint8_t *p_end)
660 val = get8(pp, p_end);
665 val = get16(pp, p_end);
669 val = get8(pp, p_end);
672 h->version = (val >> 1) & 0x1f;
673 val = get8(pp, p_end);
677 val = get8(pp, p_end);
680 h->last_sec_num = val;
684 typedef struct StreamType {
685 uint32_t stream_type;
686 enum AVMediaType codec_type;
687 enum AVCodecID codec_id;
690 static const StreamType ISO_types[] = {
691 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
692 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
693 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
694 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
695 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
696 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
697 /* Makito encoder sets stream type 0x11 for AAC,
698 * so auto-detect LOAS/LATM instead of hardcoding it. */
699 #if !CONFIG_LOAS_DEMUXER
700 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
702 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
703 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
704 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
705 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
706 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
707 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
708 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
712 static const StreamType HDMV_types[] = {
713 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
714 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
715 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
716 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
717 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
718 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
719 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
720 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
721 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
722 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
723 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
728 static const StreamType MISC_types[] = {
729 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
730 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
734 static const StreamType REGD_types[] = {
735 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
736 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
737 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
738 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
739 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
740 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
741 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
742 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
743 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
744 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
745 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
746 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
750 static const StreamType METADATA_types[] = {
751 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
752 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
756 /* descriptor present */
757 static const StreamType DESC_types[] = {
758 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
759 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
760 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
761 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
762 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
766 static void mpegts_find_stream_type(AVStream *st,
767 uint32_t stream_type,
768 const StreamType *types)
770 for (; types->stream_type; types++)
771 if (stream_type == types->stream_type) {
772 if (st->codecpar->codec_type != types->codec_type ||
773 st->codecpar->codec_id != types->codec_id) {
774 st->codecpar->codec_type = types->codec_type;
775 st->codecpar->codec_id = types->codec_id;
776 st->internal->need_context_update = 1;
778 st->request_probe = 0;
783 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
784 uint32_t stream_type, uint32_t prog_reg_desc)
786 int old_codec_type = st->codecpar->codec_type;
787 int old_codec_id = st->codecpar->codec_id;
788 int old_codec_tag = st->codecpar->codec_tag;
790 if (avcodec_is_open(st->internal->avctx)) {
791 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
795 avpriv_set_pts_info(st, 33, 1, 90000);
797 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
798 st->codecpar->codec_id = AV_CODEC_ID_NONE;
799 st->need_parsing = AVSTREAM_PARSE_FULL;
801 pes->stream_type = stream_type;
803 av_log(pes->stream, AV_LOG_DEBUG,
804 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
805 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
807 st->codecpar->codec_tag = pes->stream_type;
809 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
810 if (pes->stream_type == 4)
811 st->request_probe = 50;
812 if ((prog_reg_desc == AV_RL32("HDMV") ||
813 prog_reg_desc == AV_RL32("HDPR")) &&
814 st->codecpar->codec_id == AV_CODEC_ID_NONE) {
815 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
816 if (pes->stream_type == 0x83) {
817 // HDMV TrueHD streams also contain an AC3 coded version of the
818 // audio track - add a second stream for this
820 // priv_data cannot be shared between streams
821 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
823 return AVERROR(ENOMEM);
824 memcpy(sub_pes, pes, sizeof(*sub_pes));
826 sub_st = avformat_new_stream(pes->stream, NULL);
829 return AVERROR(ENOMEM);
832 sub_st->id = pes->pid;
833 avpriv_set_pts_info(sub_st, 33, 1, 90000);
834 sub_st->priv_data = sub_pes;
835 sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
836 sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
837 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
838 sub_pes->sub_st = pes->sub_st = sub_st;
841 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
842 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
843 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
844 st->codecpar->codec_id = old_codec_id;
845 st->codecpar->codec_type = old_codec_type;
847 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
848 (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
849 st->probe_packets > 0 &&
850 stream_type == STREAM_TYPE_PRIVATE_DATA) {
851 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
852 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
853 st->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
856 /* queue a context update if properties changed */
857 if (old_codec_type != st->codecpar->codec_type ||
858 old_codec_id != st->codecpar->codec_id ||
859 old_codec_tag != st->codecpar->codec_tag)
860 st->internal->need_context_update = 1;
865 static void reset_pes_packet_state(PESContext *pes)
867 pes->pts = AV_NOPTS_VALUE;
868 pes->dts = AV_NOPTS_VALUE;
871 av_buffer_unref(&pes->buffer);
874 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
880 pkt->buf = pes->buffer;
881 pkt->data = pes->buffer->data;
882 pkt->size = pes->data_index;
884 if (pes->total_size != MAX_PES_PAYLOAD &&
885 pes->pes_header_size + pes->data_index != pes->total_size +
887 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
888 pes->flags |= AV_PKT_FLAG_CORRUPT;
890 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
892 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
893 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
894 pkt->stream_index = pes->sub_st->index;
896 pkt->stream_index = pes->st->index;
899 /* store position of first TS packet of this PES packet */
900 pkt->pos = pes->ts_packet_pos;
901 pkt->flags = pes->flags;
904 reset_pes_packet_state(pes);
906 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
908 return AVERROR(ENOMEM);
909 *sd = pes->stream_id;
914 static uint64_t get_ts64(GetBitContext *gb, int bits)
916 if (get_bits_left(gb) < bits)
917 return AV_NOPTS_VALUE;
918 return get_bits64(gb, bits);
921 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
922 const uint8_t *buf, int buf_size)
925 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
926 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
927 int dts_flag = -1, cts_flag = -1;
928 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
929 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
930 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
932 memcpy(buf_padded, buf, buf_padded_size);
934 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
936 if (sl->use_au_start)
937 au_start_flag = get_bits1(&gb);
939 au_end_flag = get_bits1(&gb);
940 if (!sl->use_au_start && !sl->use_au_end)
941 au_start_flag = au_end_flag = 1;
943 ocr_flag = get_bits1(&gb);
945 idle_flag = get_bits1(&gb);
947 padding_flag = get_bits1(&gb);
949 padding_bits = get_bits(&gb, 3);
951 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
952 if (sl->packet_seq_num_len)
953 skip_bits_long(&gb, sl->packet_seq_num_len);
954 if (sl->degr_prior_len)
956 skip_bits(&gb, sl->degr_prior_len);
958 skip_bits_long(&gb, sl->ocr_len);
960 if (sl->use_rand_acc_pt)
962 if (sl->au_seq_num_len > 0)
963 skip_bits_long(&gb, sl->au_seq_num_len);
964 if (sl->use_timestamps) {
965 dts_flag = get_bits1(&gb);
966 cts_flag = get_bits1(&gb);
969 if (sl->inst_bitrate_len)
970 inst_bitrate_flag = get_bits1(&gb);
972 dts = get_ts64(&gb, sl->timestamp_len);
974 cts = get_ts64(&gb, sl->timestamp_len);
976 skip_bits_long(&gb, sl->au_len);
977 if (inst_bitrate_flag)
978 skip_bits_long(&gb, sl->inst_bitrate_len);
981 if (dts != AV_NOPTS_VALUE)
983 if (cts != AV_NOPTS_VALUE)
986 if (sl->timestamp_len && sl->timestamp_res)
987 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
989 return (get_bits_count(&gb) + 7) >> 3;
992 /* return non zero if a packet could be constructed */
993 static int mpegts_push_data(MpegTSFilter *filter,
994 const uint8_t *buf, int buf_size, int is_start,
997 PESContext *pes = filter->u.pes_filter.opaque;
998 MpegTSContext *ts = pes->ts;
1006 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1007 ret = new_pes_packet(pes, ts->pkt);
1012 reset_pes_packet_state(pes);
1014 pes->state = MPEGTS_HEADER;
1015 pes->ts_packet_pos = pos;
1018 while (buf_size > 0) {
1019 switch (pes->state) {
1021 len = PES_START_SIZE - pes->data_index;
1024 memcpy(pes->header + pes->data_index, p, len);
1025 pes->data_index += len;
1028 if (pes->data_index == PES_START_SIZE) {
1029 /* we got all the PES or section header. We can now
1031 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1032 pes->header[2] == 0x01) {
1033 /* it must be an mpeg2 PES stream */
1034 code = pes->header[3] | 0x100;
1035 av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1037 pes->stream_id = pes->header[3];
1039 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1041 pes->sub_st->discard == AVDISCARD_ALL)) ||
1042 code == 0x1be) /* padding_stream */
1045 /* stream not present in PMT */
1047 if (ts->skip_changes)
1050 pes->st = avformat_new_stream(ts->stream, NULL);
1052 return AVERROR(ENOMEM);
1053 pes->st->id = pes->pid;
1054 mpegts_set_stream_info(pes->st, pes, 0, 0);
1057 pes->total_size = AV_RB16(pes->header + 4);
1058 /* NOTE: a zero total size means the PES size is
1060 if (!pes->total_size)
1061 pes->total_size = MAX_PES_PAYLOAD;
1063 /* allocate pes buffer */
1064 pes->buffer = av_buffer_alloc(pes->total_size +
1065 AV_INPUT_BUFFER_PADDING_SIZE);
1067 return AVERROR(ENOMEM);
1069 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1070 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1071 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1072 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1073 pes->state = MPEGTS_PESHEADER;
1074 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1075 av_log(pes->stream, AV_LOG_TRACE,
1076 "pid=%x stream_type=%x probing\n",
1079 pes->st->request_probe = 1;
1082 pes->pes_header_size = 6;
1083 pes->state = MPEGTS_PAYLOAD;
1084 pes->data_index = 0;
1087 /* otherwise, it should be a table */
1090 pes->state = MPEGTS_SKIP;
1095 /**********************************************/
1096 /* PES packing parsing */
1097 case MPEGTS_PESHEADER:
1098 len = PES_HEADER_SIZE - pes->data_index;
1100 return AVERROR_INVALIDDATA;
1103 memcpy(pes->header + pes->data_index, p, len);
1104 pes->data_index += len;
1107 if (pes->data_index == PES_HEADER_SIZE) {
1108 pes->pes_header_size = pes->header[8] + 9;
1109 pes->state = MPEGTS_PESHEADER_FILL;
1112 case MPEGTS_PESHEADER_FILL:
1113 len = pes->pes_header_size - pes->data_index;
1115 return AVERROR_INVALIDDATA;
1118 memcpy(pes->header + pes->data_index, p, len);
1119 pes->data_index += len;
1122 if (pes->data_index == pes->pes_header_size) {
1124 unsigned int flags, pes_ext, skip;
1126 flags = pes->header[7];
1127 r = pes->header + 9;
1128 pes->pts = AV_NOPTS_VALUE;
1129 pes->dts = AV_NOPTS_VALUE;
1130 if ((flags & 0xc0) == 0x80) {
1131 pes->dts = pes->pts = ff_parse_pes_pts(r);
1133 } else if ((flags & 0xc0) == 0xc0) {
1134 pes->pts = ff_parse_pes_pts(r);
1136 pes->dts = ff_parse_pes_pts(r);
1139 pes->extended_stream_id = -1;
1140 if (flags & 0x01) { /* PES extension */
1142 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1143 skip = (pes_ext >> 4) & 0xb;
1146 if ((pes_ext & 0x41) == 0x01 &&
1147 (r + 2) <= (pes->header + pes->pes_header_size)) {
1148 /* PES extension 2 */
1149 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1150 pes->extended_stream_id = r[1];
1154 /* we got the full header. We parse it and get the payload */
1155 pes->state = MPEGTS_PAYLOAD;
1156 pes->data_index = 0;
1157 if (pes->stream_type == 0x12 && buf_size > 0) {
1158 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1160 pes->pes_header_size += sl_header_bytes;
1161 p += sl_header_bytes;
1162 buf_size -= sl_header_bytes;
1164 if (pes->stream_type == 0x15 && buf_size >= 5) {
1165 /* skip metadata access unit header */
1166 pes->pes_header_size += 5;
1170 if ( pes->ts->fix_teletext_pts
1171 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1172 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1174 AVProgram *p = NULL;
1175 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1176 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1177 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1179 AVStream *st = NULL;
1180 if (f->type == MPEGTS_PES) {
1181 PESContext *pcrpes = f->u.pes_filter.opaque;
1184 } else if (f->type == MPEGTS_PCR) {
1186 for (i = 0; i < p->nb_stream_indexes; i++) {
1187 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1188 if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1192 if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1193 // teletext packets do not always have correct timestamps,
1194 // the standard says they should be handled after 40.6 ms at most,
1195 // and the pcr error to this packet should be no more than 100 ms.
1196 // TODO: we should interpolate the PCR, not just use the last one
1197 int64_t pcr = f->last_pcr / 300;
1198 pes->st->pts_wrap_reference = st->pts_wrap_reference;
1199 pes->st->pts_wrap_behavior = st->pts_wrap_behavior;
1200 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1201 pes->pts = pes->dts = pcr;
1202 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1203 pes->dts > pcr + 3654 + 9000) {
1204 pes->pts = pes->dts = pcr + 3654 + 9000;
1205 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1206 pes->dts > pcr + 10*90000) { //10sec
1207 pes->pts = pes->dts = pcr + 3654 + 9000;
1217 case MPEGTS_PAYLOAD:
1219 if (pes->data_index > 0 &&
1220 pes->data_index + buf_size > pes->total_size) {
1221 ret = new_pes_packet(pes, ts->pkt);
1224 pes->total_size = MAX_PES_PAYLOAD;
1225 pes->buffer = av_buffer_alloc(pes->total_size +
1226 AV_INPUT_BUFFER_PADDING_SIZE);
1228 return AVERROR(ENOMEM);
1230 } else if (pes->data_index == 0 &&
1231 buf_size > pes->total_size) {
1232 // pes packet size is < ts size packet and pes data is padded with 0xff
1233 // not sure if this is legal in ts but see issue #2392
1234 buf_size = pes->total_size;
1236 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1237 pes->data_index += buf_size;
1238 /* emit complete packets with known packet size
1239 * decreases demuxer delay for infrequent packets like subtitles from
1240 * a couple of seconds to milliseconds for properly muxed files.
1241 * total_size is the number of bytes following pes_packet_length
1242 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1243 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1244 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1246 ret = new_pes_packet(pes, ts->pkt);
1262 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1267 /* if no pid found, then add a pid context */
1268 pes = av_mallocz(sizeof(PESContext));
1272 pes->stream = ts->stream;
1274 pes->pcr_pid = pcr_pid;
1275 pes->state = MPEGTS_SKIP;
1276 pes->pts = AV_NOPTS_VALUE;
1277 pes->dts = AV_NOPTS_VALUE;
1278 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1287 typedef struct MP4DescrParseContext {
1291 Mp4Descr *active_descr;
1293 int max_descr_count;
1295 int predefined_SLConfigDescriptor_seen;
1296 } MP4DescrParseContext;
1298 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1299 const uint8_t *buf, unsigned size,
1300 Mp4Descr *descr, int max_descr_count)
1303 if (size > (1 << 30))
1304 return AVERROR_INVALIDDATA;
1306 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1307 NULL, NULL, NULL, NULL)) < 0)
1314 d->active_descr = NULL;
1315 d->max_descr_count = max_descr_count;
1320 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1322 int64_t new_off = avio_tell(pb);
1323 (*len) -= new_off - *off;
1327 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1330 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1333 int ret = parse_mp4_descr(d, off, len, 0);
1336 update_offsets(&d->pb, &off, &len);
1341 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1343 avio_rb16(&d->pb); // ID
1349 update_offsets(&d->pb, &off, &len);
1350 return parse_mp4_descr_arr(d, off, len);
1353 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1358 id_flags = avio_rb16(&d->pb);
1359 if (!(id_flags & 0x0020)) { // URL_Flag
1360 update_offsets(&d->pb, &off, &len);
1361 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1367 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1372 if (d->descr_count >= d->max_descr_count)
1373 return AVERROR_INVALIDDATA;
1374 ff_mp4_parse_es_descr(&d->pb, &es_id);
1375 d->active_descr = d->descr + (d->descr_count++);
1377 d->active_descr->es_id = es_id;
1378 update_offsets(&d->pb, &off, &len);
1379 if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1381 update_offsets(&d->pb, &off, &len);
1383 ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1384 d->active_descr = NULL;
1388 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1391 Mp4Descr *descr = d->active_descr;
1393 return AVERROR_INVALIDDATA;
1394 d->active_descr->dec_config_descr = av_malloc(len);
1395 if (!descr->dec_config_descr)
1396 return AVERROR(ENOMEM);
1397 descr->dec_config_descr_len = len;
1398 avio_read(&d->pb, descr->dec_config_descr, len);
1402 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1404 Mp4Descr *descr = d->active_descr;
1407 return AVERROR_INVALIDDATA;
1409 predefined = avio_r8(&d->pb);
1412 int flags = avio_r8(&d->pb);
1413 descr->sl.use_au_start = !!(flags & 0x80);
1414 descr->sl.use_au_end = !!(flags & 0x40);
1415 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1416 descr->sl.use_padding = !!(flags & 0x08);
1417 descr->sl.use_timestamps = !!(flags & 0x04);
1418 descr->sl.use_idle = !!(flags & 0x02);
1419 descr->sl.timestamp_res = avio_rb32(&d->pb);
1421 descr->sl.timestamp_len = avio_r8(&d->pb);
1422 if (descr->sl.timestamp_len > 64) {
1423 avpriv_request_sample(NULL, "timestamp_len > 64");
1424 descr->sl.timestamp_len = 64;
1425 return AVERROR_PATCHWELCOME;
1427 descr->sl.ocr_len = avio_r8(&d->pb);
1428 descr->sl.au_len = avio_r8(&d->pb);
1429 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1430 lengths = avio_rb16(&d->pb);
1431 descr->sl.degr_prior_len = lengths >> 12;
1432 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1433 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1434 } else if (!d->predefined_SLConfigDescriptor_seen){
1435 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1436 d->predefined_SLConfigDescriptor_seen = 1;
1441 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1445 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1448 update_offsets(&d->pb, &off, &len);
1449 if (len < 0 || len1 > len || len1 <= 0) {
1450 av_log(d->s, AV_LOG_ERROR,
1451 "Tag %x length violation new length %d bytes remaining %d\n",
1453 return AVERROR_INVALIDDATA;
1456 if (d->level++ >= MAX_LEVEL) {
1457 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1458 ret = AVERROR_INVALIDDATA;
1462 if (target_tag && tag != target_tag) {
1463 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1465 ret = AVERROR_INVALIDDATA;
1471 ret = parse_MP4IODescrTag(d, off, len1);
1474 ret = parse_MP4ODescrTag(d, off, len1);
1477 ret = parse_MP4ESDescrTag(d, off, len1);
1479 case MP4DecConfigDescrTag:
1480 ret = parse_MP4DecConfigDescrTag(d, off, len1);
1483 ret = parse_MP4SLDescrTag(d, off, len1);
1490 avio_seek(&d->pb, off + len1, SEEK_SET);
1494 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1495 Mp4Descr *descr, int *descr_count, int max_descr_count)
1497 MP4DescrParseContext d;
1500 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1504 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1506 *descr_count = d.descr_count;
1510 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1511 Mp4Descr *descr, int *descr_count, int max_descr_count)
1513 MP4DescrParseContext d;
1516 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1520 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1522 *descr_count = d.descr_count;
1526 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1529 MpegTSContext *ts = filter->u.section_filter.opaque;
1530 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1532 const uint8_t *p, *p_end;
1534 int mp4_descr_count = 0;
1535 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1537 AVFormatContext *s = ts->stream;
1539 p_end = section + section_len - 4;
1541 if (parse_section_header(&h, &p, p_end) < 0)
1543 if (h.tid != M4OD_TID)
1545 if (skip_identical(&h, tssf))
1548 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1549 MAX_MP4_DESCR_COUNT);
1551 for (pid = 0; pid < NB_PID_MAX; pid++) {
1554 for (i = 0; i < mp4_descr_count; i++) {
1557 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1559 if (ts->pids[pid]->type != MPEGTS_PES) {
1560 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1563 pes = ts->pids[pid]->u.pes_filter.opaque;
1568 pes->sl = mp4_descr[i].sl;
1570 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1571 mp4_descr[i].dec_config_descr_len, 0,
1572 NULL, NULL, NULL, NULL);
1573 ff_mp4_read_dec_config_descr(s, st, &pb);
1574 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1575 st->codecpar->extradata_size > 0)
1576 st->need_parsing = 0;
1577 if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1578 st->codecpar->extradata_size > 0)
1579 st->need_parsing = 0;
1581 st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1582 st->internal->need_context_update = 1;
1585 for (i = 0; i < mp4_descr_count; i++)
1586 av_free(mp4_descr[i].dec_config_descr);
1589 static const uint8_t opus_coupled_stream_cnt[9] = {
1590 1, 0, 1, 1, 2, 2, 2, 3, 3
1593 static const uint8_t opus_stream_cnt[9] = {
1594 1, 1, 1, 2, 2, 3, 4, 4, 5,
1597 static const uint8_t opus_channel_map[8][8] = {
1605 { 0,6,1,2,3,4,5,7 },
1608 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1609 const uint8_t **pp, const uint8_t *desc_list_end,
1610 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1613 const uint8_t *desc_end;
1614 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1618 desc_tag = get8(pp, desc_list_end);
1620 return AVERROR_INVALIDDATA;
1621 desc_len = get8(pp, desc_list_end);
1623 return AVERROR_INVALIDDATA;
1624 desc_end = *pp + desc_len;
1625 if (desc_end > desc_list_end)
1626 return AVERROR_INVALIDDATA;
1628 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1630 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1631 stream_type == STREAM_TYPE_PRIVATE_DATA)
1632 mpegts_find_stream_type(st, desc_tag, DESC_types);
1635 case 0x1E: /* SL descriptor */
1636 desc_es_id = get16(pp, desc_end);
1639 if (ts && ts->pids[pid])
1640 ts->pids[pid]->es_id = desc_es_id;
1641 for (i = 0; i < mp4_descr_count; i++)
1642 if (mp4_descr[i].dec_config_descr_len &&
1643 mp4_descr[i].es_id == desc_es_id) {
1645 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1646 mp4_descr[i].dec_config_descr_len, 0,
1647 NULL, NULL, NULL, NULL);
1648 ff_mp4_read_dec_config_descr(fc, st, &pb);
1649 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1650 st->codecpar->extradata_size > 0) {
1651 st->need_parsing = 0;
1652 st->internal->need_context_update = 1;
1654 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1655 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1658 case 0x1F: /* FMC descriptor */
1659 if (get16(pp, desc_end) < 0)
1661 if (mp4_descr_count > 0 &&
1662 (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1663 (st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1664 st->request_probe > 0) &&
1665 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1667 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1668 mp4_descr->dec_config_descr_len, 0,
1669 NULL, NULL, NULL, NULL);
1670 ff_mp4_read_dec_config_descr(fc, st, &pb);
1671 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1672 st->codecpar->extradata_size > 0) {
1673 st->request_probe = st->need_parsing = 0;
1674 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1675 st->internal->need_context_update = 1;
1679 case 0x56: /* DVB teletext descriptor */
1681 uint8_t *extradata = NULL;
1682 int language_count = desc_len / 5;
1684 if (desc_len > 0 && desc_len % 5 != 0)
1685 return AVERROR_INVALIDDATA;
1687 if (language_count > 0) {
1688 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1689 av_assert0(language_count <= sizeof(language) / 4);
1691 if (st->codecpar->extradata == NULL) {
1692 if (ff_alloc_extradata(st->codecpar, language_count * 2)) {
1693 return AVERROR(ENOMEM);
1697 if (st->codecpar->extradata_size < language_count * 2)
1698 return AVERROR_INVALIDDATA;
1700 extradata = st->codecpar->extradata;
1702 for (i = 0; i < language_count; i++) {
1703 language[i * 4 + 0] = get8(pp, desc_end);
1704 language[i * 4 + 1] = get8(pp, desc_end);
1705 language[i * 4 + 2] = get8(pp, desc_end);
1706 language[i * 4 + 3] = ',';
1708 memcpy(extradata, *pp, 2);
1714 language[i * 4 - 1] = 0;
1715 av_dict_set(&st->metadata, "language", language, 0);
1716 st->internal->need_context_update = 1;
1720 case 0x59: /* subtitling descriptor */
1722 /* 8 bytes per DVB subtitle substream data:
1723 * ISO_639_language_code (3 bytes),
1724 * subtitling_type (1 byte),
1725 * composition_page_id (2 bytes),
1726 * ancillary_page_id (2 bytes) */
1727 int language_count = desc_len / 8;
1729 if (desc_len > 0 && desc_len % 8 != 0)
1730 return AVERROR_INVALIDDATA;
1732 if (language_count > 1) {
1733 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1736 if (language_count > 0) {
1739 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1740 av_assert0(language_count <= sizeof(language) / 4);
1742 if (st->codecpar->extradata == NULL) {
1743 if (ff_alloc_extradata(st->codecpar, language_count * 5)) {
1744 return AVERROR(ENOMEM);
1748 if (st->codecpar->extradata_size < language_count * 5)
1749 return AVERROR_INVALIDDATA;
1751 extradata = st->codecpar->extradata;
1753 for (i = 0; i < language_count; i++) {
1754 language[i * 4 + 0] = get8(pp, desc_end);
1755 language[i * 4 + 1] = get8(pp, desc_end);
1756 language[i * 4 + 2] = get8(pp, desc_end);
1757 language[i * 4 + 3] = ',';
1759 /* hearing impaired subtitles detection using subtitling_type */
1761 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1762 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1763 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1764 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1765 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1766 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1767 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1771 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1772 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1778 language[i * 4 - 1] = 0;
1779 av_dict_set(&st->metadata, "language", language, 0);
1780 st->internal->need_context_update = 1;
1784 case 0x0a: /* ISO 639 language descriptor */
1785 for (i = 0; i + 4 <= desc_len; i += 4) {
1786 language[i + 0] = get8(pp, desc_end);
1787 language[i + 1] = get8(pp, desc_end);
1788 language[i + 2] = get8(pp, desc_end);
1789 language[i + 3] = ',';
1790 switch (get8(pp, desc_end)) {
1792 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1795 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1798 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1802 if (i && language[0]) {
1803 language[i - 1] = 0;
1804 av_dict_set(&st->metadata, "language", language, 0);
1807 case 0x05: /* registration descriptor */
1808 st->codecpar->codec_tag = bytestream_get_le32(pp);
1809 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1810 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) {
1811 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1812 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1813 st->request_probe = 50;
1816 case 0x52: /* stream identifier descriptor */
1817 st->stream_identifier = 1 + get8(pp, desc_end);
1819 case 0x26: /* metadata descriptor */
1820 if (get16(pp, desc_end) == 0xFFFF)
1822 if (get8(pp, desc_end) == 0xFF) {
1823 st->codecpar->codec_tag = bytestream_get_le32(pp);
1824 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
1825 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
1828 case 0x7f: /* DVB extension descriptor */
1829 ext_desc_tag = get8(pp, desc_end);
1830 if (ext_desc_tag < 0)
1831 return AVERROR_INVALIDDATA;
1832 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
1833 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1834 if (!st->codecpar->extradata) {
1835 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
1836 AV_INPUT_BUFFER_PADDING_SIZE);
1837 if (!st->codecpar->extradata)
1838 return AVERROR(ENOMEM);
1840 st->codecpar->extradata_size = sizeof(opus_default_extradata);
1841 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
1843 channel_config_code = get8(pp, desc_end);
1844 if (channel_config_code < 0)
1845 return AVERROR_INVALIDDATA;
1846 if (channel_config_code <= 0x8) {
1847 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1848 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
1849 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
1850 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1851 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
1853 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1855 st->need_parsing = AVSTREAM_PARSE_FULL;
1856 st->internal->need_context_update = 1;
1867 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1869 MpegTSContext *ts = filter->u.section_filter.opaque;
1870 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1871 SectionHeader h1, *h = &h1;
1874 const uint8_t *p, *p_end, *desc_list_end;
1875 int program_info_length, pcr_pid, pid, stream_type;
1877 uint32_t prog_reg_desc = 0; /* registration descriptor */
1879 int mp4_descr_count = 0;
1880 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1883 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
1884 hex_dump_debug(ts->stream, section, section_len);
1886 p_end = section + section_len - 4;
1888 if (parse_section_header(h, &p, p_end) < 0)
1890 if (skip_identical(h, tssf))
1893 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d\n",
1894 h->id, h->sec_num, h->last_sec_num, h->version);
1896 if (h->tid != PMT_TID)
1898 if (!ts->scan_all_pmts && ts->skip_changes)
1901 if (!ts->skip_clear)
1902 clear_program(ts, h->id);
1904 pcr_pid = get16(&p, p_end);
1908 add_pid_to_pmt(ts, h->id, pcr_pid);
1909 set_pcr_pid(ts->stream, h->id, pcr_pid);
1911 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
1913 program_info_length = get16(&p, p_end);
1914 if (program_info_length < 0)
1916 program_info_length &= 0xfff;
1917 while (program_info_length >= 2) {
1919 tag = get8(&p, p_end);
1920 len = get8(&p, p_end);
1922 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
1924 if (len > program_info_length - 2)
1925 // something else is broken, exit the program_descriptors_loop
1927 program_info_length -= len + 2;
1928 if (tag == 0x1d) { // IOD descriptor
1929 get8(&p, p_end); // scope
1930 get8(&p, p_end); // label
1932 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
1933 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1934 } else if (tag == 0x05 && len >= 4) { // registration descriptor
1935 prog_reg_desc = bytestream_get_le32(&p);
1940 p += program_info_length;
1944 // stop parsing after pmt, we found header
1945 if (!ts->stream->nb_streams)
1948 set_pmt_found(ts, h->id);
1954 stream_type = get8(&p, p_end);
1955 if (stream_type < 0)
1957 pid = get16(&p, p_end);
1961 if (pid == ts->current_pid)
1964 /* now create stream */
1965 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
1966 pes = ts->pids[pid]->u.pes_filter.opaque;
1968 pes->st = avformat_new_stream(pes->stream, NULL);
1971 pes->st->id = pes->pid;
1974 } else if (stream_type != 0x13) {
1976 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
1977 pes = add_pes_stream(ts, pid, pcr_pid);
1979 st = avformat_new_stream(pes->stream, NULL);
1985 int idx = ff_find_stream_index(ts->stream, pid);
1987 st = ts->stream->streams[idx];
1989 st = avformat_new_stream(ts->stream, NULL);
1993 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2000 if (pes && !pes->stream_type)
2001 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2003 add_pid_to_pmt(ts, h->id, pid);
2005 av_program_add_stream_index(ts->stream, h->id, st->index);
2007 desc_list_len = get16(&p, p_end);
2008 if (desc_list_len < 0)
2010 desc_list_len &= 0xfff;
2011 desc_list_end = p + desc_list_len;
2012 if (desc_list_end > p_end)
2015 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2016 desc_list_end, mp4_descr,
2017 mp4_descr_count, pid, ts) < 0)
2020 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2021 stream_type == 0x83 && pes->sub_st) {
2022 av_program_add_stream_index(ts->stream, h->id,
2023 pes->sub_st->index);
2024 pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2030 if (!ts->pids[pcr_pid])
2031 mpegts_open_pcr_filter(ts, pcr_pid);
2034 for (i = 0; i < mp4_descr_count; i++)
2035 av_free(mp4_descr[i].dec_config_descr);
2038 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2040 MpegTSContext *ts = filter->u.section_filter.opaque;
2041 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2042 SectionHeader h1, *h = &h1;
2043 const uint8_t *p, *p_end;
2047 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2048 hex_dump_debug(ts->stream, section, section_len);
2050 p_end = section + section_len - 4;
2052 if (parse_section_header(h, &p, p_end) < 0)
2054 if (h->tid != PAT_TID)
2056 if (ts->skip_changes)
2059 if (skip_identical(h, tssf))
2061 ts->stream->ts_id = h->id;
2065 sid = get16(&p, p_end);
2068 pmt_pid = get16(&p, p_end);
2073 if (pmt_pid == ts->current_pid)
2076 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2078 if (sid == 0x0000) {
2081 MpegTSFilter *fil = ts->pids[pmt_pid];
2082 program = av_new_program(ts->stream, sid);
2084 program->program_num = sid;
2085 program->pmt_pid = pmt_pid;
2088 if ( fil->type != MPEGTS_SECTION
2089 || fil->pid != pmt_pid
2090 || fil->u.section_filter.section_cb != pmt_cb)
2091 mpegts_close_filter(ts, ts->pids[pmt_pid]);
2093 if (!ts->pids[pmt_pid])
2094 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2095 add_pat_entry(ts, sid);
2096 add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2097 add_pid_to_pmt(ts, sid, pmt_pid);
2103 for (j=0; j<ts->stream->nb_programs; j++) {
2104 for (i = 0; i < ts->nb_prg; i++)
2105 if (ts->prg[i].id == ts->stream->programs[j]->id)
2107 if (i==ts->nb_prg && !ts->skip_clear)
2108 clear_avprogram(ts, ts->stream->programs[j]->id);
2113 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2115 MpegTSContext *ts = filter->u.section_filter.opaque;
2116 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2117 SectionHeader h1, *h = &h1;
2118 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2119 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2120 char *name, *provider_name;
2122 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2123 hex_dump_debug(ts->stream, section, section_len);
2125 p_end = section + section_len - 4;
2127 if (parse_section_header(h, &p, p_end) < 0)
2129 if (h->tid != SDT_TID)
2131 if (ts->skip_changes)
2133 if (skip_identical(h, tssf))
2136 onid = get16(&p, p_end);
2139 val = get8(&p, p_end);
2143 sid = get16(&p, p_end);
2146 val = get8(&p, p_end);
2149 desc_list_len = get16(&p, p_end);
2150 if (desc_list_len < 0)
2152 desc_list_len &= 0xfff;
2153 desc_list_end = p + desc_list_len;
2154 if (desc_list_end > p_end)
2157 desc_tag = get8(&p, desc_list_end);
2160 desc_len = get8(&p, desc_list_end);
2161 desc_end = p + desc_len;
2162 if (desc_len < 0 || desc_end > desc_list_end)
2165 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2166 desc_tag, desc_len);
2170 service_type = get8(&p, p_end);
2171 if (service_type < 0)
2173 provider_name = getstr8(&p, p_end);
2176 name = getstr8(&p, p_end);
2178 AVProgram *program = av_new_program(ts->stream, sid);
2180 av_dict_set(&program->metadata, "service_name", name, 0);
2181 av_dict_set(&program->metadata, "service_provider",
2186 av_free(provider_name);
2197 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2198 const uint8_t *packet);
2200 /* handle one TS packet */
2201 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2204 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2205 has_adaptation, has_payload;
2206 const uint8_t *p, *p_end;
2209 pid = AV_RB16(packet + 1) & 0x1fff;
2210 if (pid && discard_pid(ts, pid))
2212 is_start = packet[1] & 0x40;
2213 tss = ts->pids[pid];
2214 if (ts->auto_guess && !tss && is_start) {
2215 add_pes_stream(ts, pid, -1);
2216 tss = ts->pids[pid];
2220 ts->current_pid = pid;
2222 afc = (packet[3] >> 4) & 3;
2223 if (afc == 0) /* reserved value */
2225 has_adaptation = afc & 2;
2226 has_payload = afc & 1;
2227 is_discontinuity = has_adaptation &&
2228 packet[4] != 0 && /* with length > 0 */
2229 (packet[5] & 0x80); /* and discontinuity indicated */
2231 /* continuity check (currently not used) */
2232 cc = (packet[3] & 0xf);
2233 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2234 cc_ok = pid == 0x1FFF || // null packet PID
2241 av_log(ts->stream, AV_LOG_DEBUG,
2242 "Continuity check failed for pid %d expected %d got %d\n",
2243 pid, expected_cc, cc);
2244 if (tss->type == MPEGTS_PES) {
2245 PESContext *pc = tss->u.pes_filter.opaque;
2246 pc->flags |= AV_PKT_FLAG_CORRUPT;
2251 if (has_adaptation) {
2254 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2255 tss->last_pcr = pcr_h * 300 + pcr_l;
2256 /* skip adaptation field */
2259 /* if past the end of packet, ignore */
2260 p_end = packet + TS_PACKET_SIZE;
2261 if (p >= p_end || !has_payload)
2264 pos = avio_tell(ts->stream->pb);
2266 av_assert0(pos >= TS_PACKET_SIZE);
2267 ts->pos47_full = pos - TS_PACKET_SIZE;
2270 if (tss->type == MPEGTS_SECTION) {
2272 /* pointer field present */
2274 if (len > p_end - p)
2277 /* write remaining section bytes */
2278 write_section_data(ts, tss,
2280 /* check whether filter has been closed */
2286 write_section_data(ts, tss,
2291 write_section_data(ts, tss,
2296 // stop find_stream_info from waiting for more streams
2297 // when all programs have received a PMT
2298 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2300 for (i = 0; i < ts->nb_prg; i++) {
2301 if (!ts->prg[i].pmt_found)
2304 if (i == ts->nb_prg && ts->nb_prg > 0) {
2306 for (i = 0; i < ts->stream->nb_streams; i++) {
2307 AVStream *st = ts->stream->streams[i];
2308 types |= 1<<st->codecpar->codec_type;
2310 if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2311 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2312 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2319 // Note: The position here points actually behind the current packet.
2320 if (tss->type == MPEGTS_PES) {
2321 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2322 pos - ts->raw_packet_size)) < 0)
2330 static void reanalyze(MpegTSContext *ts) {
2331 AVIOContext *pb = ts->stream->pb;
2332 int64_t pos = avio_tell(pb);
2335 pos -= ts->pos47_full;
2336 if (pos == TS_PACKET_SIZE) {
2337 ts->size_stat[0] ++;
2338 } else if (pos == TS_DVHS_PACKET_SIZE) {
2339 ts->size_stat[1] ++;
2340 } else if (pos == TS_FEC_PACKET_SIZE) {
2341 ts->size_stat[2] ++;
2344 ts->size_stat_count ++;
2345 if (ts->size_stat_count > SIZE_STAT_THRESHOLD) {
2347 if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2348 newsize = TS_PACKET_SIZE;
2349 } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2350 newsize = TS_DVHS_PACKET_SIZE;
2351 } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2352 newsize = TS_FEC_PACKET_SIZE;
2354 if (newsize && newsize != ts->raw_packet_size) {
2355 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2356 ts->raw_packet_size = newsize;
2358 ts->size_stat_count = 0;
2359 memset(ts->size_stat, 0, sizeof(ts->size_stat));
2363 /* XXX: try to find a better synchro over several packets (use
2364 * get_packet_size() ?) */
2365 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2367 MpegTSContext *ts = s->priv_data;
2368 AVIOContext *pb = s->pb;
2370 uint64_t pos = avio_tell(pb);
2372 avio_seek(pb, -FFMIN(seekback, pos), SEEK_CUR);
2374 //Special case for files like 01c56b0dc1.ts
2375 if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2376 avio_seek(pb, 12, SEEK_CUR);
2380 for (i = 0; i < ts->resync_size; i++) {
2385 avio_seek(pb, -1, SEEK_CUR);
2386 reanalyze(s->priv_data);
2390 av_log(s, AV_LOG_ERROR,
2391 "max resync size reached, could not find sync byte\n");
2393 return AVERROR_INVALIDDATA;
2396 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2397 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2398 const uint8_t **data)
2400 AVIOContext *pb = s->pb;
2404 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2405 if (len != TS_PACKET_SIZE)
2406 return len < 0 ? len : AVERROR_EOF;
2407 /* check packet sync byte */
2408 if ((*data)[0] != 0x47) {
2409 /* find a new packet start */
2411 if (mpegts_resync(s, raw_packet_size, *data) < 0)
2412 return AVERROR(EAGAIN);
2422 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2424 AVIOContext *pb = s->pb;
2425 int skip = raw_packet_size - TS_PACKET_SIZE;
2427 avio_skip(pb, skip);
2430 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2432 AVFormatContext *s = ts->stream;
2433 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2434 const uint8_t *data;
2438 if (avio_tell(s->pb) != ts->last_pos) {
2440 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2441 /* seek detected, flush pes buffer */
2442 for (i = 0; i < NB_PID_MAX; i++) {
2444 if (ts->pids[i]->type == MPEGTS_PES) {
2445 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2446 av_buffer_unref(&pes->buffer);
2447 pes->data_index = 0;
2448 pes->state = MPEGTS_SKIP; /* skip until pes header */
2449 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2450 ts->pids[i]->u.section_filter.last_ver = -1;
2452 ts->pids[i]->last_cc = -1;
2453 ts->pids[i]->last_pcr = -1;
2460 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2463 if (nb_packets != 0 && packet_num >= nb_packets ||
2464 ts->stop_parse > 1) {
2465 ret = AVERROR(EAGAIN);
2468 if (ts->stop_parse > 0)
2471 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2474 ret = handle_packet(ts, data);
2475 finished_reading_packet(s, ts->raw_packet_size);
2479 ts->last_pos = avio_tell(s->pb);
2483 static int mpegts_probe(AVProbeData *p)
2485 const int size = p->buf_size;
2489 int check_count = size / TS_FEC_PACKET_SIZE;
2490 #define CHECK_COUNT 10
2491 #define CHECK_BLOCK 100
2496 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2497 int left = FFMIN(check_count - i, CHECK_BLOCK);
2498 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2499 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2500 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2501 score = FFMAX3(score, dvhs_score, fec_score);
2503 maxscore = FFMAX(maxscore, score);
2506 sumscore = sumscore * CHECK_COUNT / check_count;
2507 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2509 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2511 if (check_count >= CHECK_COUNT && sumscore > 6) {
2512 return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2513 } else if (check_count >= CHECK_COUNT && maxscore > 6) {
2514 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2515 } else if (sumscore > 6) {
2522 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2523 * (-1) if not available */
2524 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2526 int afc, len, flags;
2530 afc = (packet[3] >> 4) & 3;
2532 return AVERROR_INVALIDDATA;
2537 return AVERROR_INVALIDDATA;
2540 if (!(flags & 0x10))
2541 return AVERROR_INVALIDDATA;
2543 return AVERROR_INVALIDDATA;
2545 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2546 *ppcr_low = ((p[4] & 1) << 8) | p[5];
2550 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2552 /* NOTE: We attempt to seek on non-seekable files as well, as the
2553 * probe buffer usually is big enough. Only warn if the seek failed
2554 * on files where the seek should work. */
2555 if (avio_seek(pb, pos, SEEK_SET) < 0)
2556 av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2559 static int mpegts_read_header(AVFormatContext *s)
2561 MpegTSContext *ts = s->priv_data;
2562 AVIOContext *pb = s->pb;
2563 uint8_t buf[8 * 1024] = {0};
2565 int64_t pos, probesize = s->probesize;
2567 if (ffio_ensure_seekback(pb, probesize) < 0)
2568 av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2570 /* read the first 8192 bytes to get packet size */
2571 pos = avio_tell(pb);
2572 len = avio_read(pb, buf, sizeof(buf));
2573 ts->raw_packet_size = get_packet_size(buf, len);
2574 if (ts->raw_packet_size <= 0) {
2575 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2576 ts->raw_packet_size = TS_PACKET_SIZE;
2581 if (s->iformat == &ff_mpegts_demuxer) {
2584 /* first do a scan to get all the services */
2585 seek_back(s, pb, pos);
2587 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2589 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2591 handle_packets(ts, probesize / ts->raw_packet_size);
2592 /* if could not find service, enable auto_guess */
2596 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2598 s->ctx_flags |= AVFMTCTX_NOHEADER;
2601 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2602 int64_t pcrs[2], pcr_h;
2603 int packet_count[2];
2604 uint8_t packet[TS_PACKET_SIZE];
2605 const uint8_t *data;
2607 /* only read packets */
2609 st = avformat_new_stream(s, NULL);
2611 return AVERROR(ENOMEM);
2612 avpriv_set_pts_info(st, 60, 1, 27000000);
2613 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2614 st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
2616 /* we iterate until we find two PCRs to estimate the bitrate */
2621 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2624 pid = AV_RB16(data + 1) & 0x1fff;
2625 if ((pcr_pid == -1 || pcr_pid == pid) &&
2626 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2627 finished_reading_packet(s, ts->raw_packet_size);
2629 packet_count[nb_pcrs] = nb_packets;
2630 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2635 finished_reading_packet(s, ts->raw_packet_size);
2640 /* NOTE1: the bitrate is computed without the FEC */
2641 /* NOTE2: it is only the bitrate of the start of the stream */
2642 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2643 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2644 s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
2645 st->codecpar->bit_rate = s->bit_rate;
2646 st->start_time = ts->cur_pcr;
2647 av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
2648 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2651 seek_back(s, pb, pos);
2655 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2657 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
2659 MpegTSContext *ts = s->priv_data;
2661 int64_t pcr_h, next_pcr_h, pos;
2662 int pcr_l, next_pcr_l;
2663 uint8_t pcr_buf[12];
2664 const uint8_t *data;
2666 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2667 return AVERROR(ENOMEM);
2668 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2669 pkt->pos = avio_tell(s->pb);
2671 av_packet_unref(pkt);
2674 if (data != pkt->data)
2675 memcpy(pkt->data, data, ts->raw_packet_size);
2676 finished_reading_packet(s, ts->raw_packet_size);
2677 if (ts->mpeg2ts_compute_pcr) {
2678 /* compute exact PCR for each packet */
2679 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2680 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2681 pos = avio_tell(s->pb);
2682 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
2683 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2684 avio_read(s->pb, pcr_buf, 12);
2685 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2686 /* XXX: not precise enough */
2688 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2693 avio_seek(s->pb, pos, SEEK_SET);
2694 /* no next PCR found: we use previous increment */
2695 ts->cur_pcr = pcr_h * 300 + pcr_l;
2697 pkt->pts = ts->cur_pcr;
2698 pkt->duration = ts->pcr_incr;
2699 ts->cur_pcr += ts->pcr_incr;
2701 pkt->stream_index = 0;
2705 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
2707 MpegTSContext *ts = s->priv_data;
2712 ret = handle_packets(ts, 0);
2714 av_packet_unref(ts->pkt);
2715 /* flush pes data left */
2716 for (i = 0; i < NB_PID_MAX; i++)
2717 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2718 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2719 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2720 ret = new_pes_packet(pes, pkt);
2723 pes->state = MPEGTS_SKIP;
2730 if (!ret && pkt->size < 0)
2731 ret = AVERROR_INVALIDDATA;
2735 static void mpegts_free(MpegTSContext *ts)
2741 for (i = 0; i < NB_PID_MAX; i++)
2743 mpegts_close_filter(ts, ts->pids[i]);
2746 static int mpegts_read_close(AVFormatContext *s)
2748 MpegTSContext *ts = s->priv_data;
2753 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2754 int64_t *ppos, int64_t pos_limit)
2756 MpegTSContext *ts = s->priv_data;
2757 int64_t pos, timestamp;
2758 uint8_t buf[TS_PACKET_SIZE];
2759 int pcr_l, pcr_pid =
2760 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
2761 int pos47 = ts->pos47_full % ts->raw_packet_size;
2763 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
2764 ts->raw_packet_size + pos47;
2765 while(pos < pos_limit) {
2766 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2767 return AV_NOPTS_VALUE;
2768 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2769 return AV_NOPTS_VALUE;
2770 if (buf[0] != 0x47) {
2771 if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
2772 return AV_NOPTS_VALUE;
2773 pos = avio_tell(s->pb);
2776 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2777 parse_pcr(×tamp, &pcr_l, buf) == 0) {
2781 pos += ts->raw_packet_size;
2784 return AV_NOPTS_VALUE;
2787 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2788 int64_t *ppos, int64_t pos_limit)
2790 MpegTSContext *ts = s->priv_data;
2792 int pos47 = ts->pos47_full % ts->raw_packet_size;
2793 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
2794 ff_read_frame_flush(s);
2795 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2796 return AV_NOPTS_VALUE;
2797 while(pos < pos_limit) {
2800 av_init_packet(&pkt);
2801 ret = av_read_frame(s, &pkt);
2803 return AV_NOPTS_VALUE;
2804 if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
2805 ff_reduce_index(s, pkt.stream_index);
2806 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
2807 if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
2808 int64_t dts = pkt.dts;
2810 av_packet_unref(&pkt);
2815 av_packet_unref(&pkt);
2818 return AV_NOPTS_VALUE;
2821 /**************************************************************/
2822 /* parsing functions - called from other demuxers such as RTP */
2824 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
2828 ts = av_mallocz(sizeof(MpegTSContext));
2831 /* no stream case, currently used by RTP */
2832 ts->raw_packet_size = TS_PACKET_SIZE;
2835 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2836 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2841 /* return the consumed length if a packet was output, or -1 if no
2842 * packet is output */
2843 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
2844 const uint8_t *buf, int len)
2852 if (len < TS_PACKET_SIZE)
2853 return AVERROR_INVALIDDATA;
2854 if (buf[0] != 0x47) {
2858 handle_packet(ts, buf);
2859 buf += TS_PACKET_SIZE;
2860 len -= TS_PACKET_SIZE;
2861 if (ts->stop_parse == 1)
2868 void avpriv_mpegts_parse_close(MpegTSContext *ts)
2874 AVInputFormat ff_mpegts_demuxer = {
2876 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2877 .priv_data_size = sizeof(MpegTSContext),
2878 .read_probe = mpegts_probe,
2879 .read_header = mpegts_read_header,
2880 .read_packet = mpegts_read_packet,
2881 .read_close = mpegts_read_close,
2882 .read_timestamp = mpegts_get_dts,
2883 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2884 .priv_class = &mpegts_class,
2887 AVInputFormat ff_mpegtsraw_demuxer = {
2888 .name = "mpegtsraw",
2889 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
2890 .priv_data_size = sizeof(MpegTSContext),
2891 .read_header = mpegts_read_header,
2892 .read_packet = mpegts_raw_read_packet,
2893 .read_close = mpegts_read_close,
2894 .read_timestamp = mpegts_get_dts,
2895 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2896 .priv_class = &mpegtsraw_class,