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/intreadwrite.h"
25 #include "libavutil/log.h"
26 #include "libavutil/dict.h"
27 #include "libavutil/mathematics.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/avassert.h"
30 #include "libavcodec/bytestream.h"
31 #include "libavcodec/get_bits.h"
32 #include "libavcodec/opus.h"
36 #include "avio_internal.h"
40 /* maximum size in which we look for synchronisation if
41 * synchronisation is lost */
42 #define MAX_RESYNC_SIZE 65536
44 #define MAX_PES_PAYLOAD 200 * 1024
46 #define MAX_MP4_DESCR_COUNT 16
48 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
50 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
51 (modulus) = (dividend) % (divisor); \
52 (prev_dividend) = (dividend); \
55 enum MpegTSFilterType {
61 typedef struct MpegTSFilter MpegTSFilter;
63 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
64 int is_start, int64_t pos);
66 typedef struct MpegTSPESFilter {
71 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
73 typedef void SetServiceCallback (void *opaque, int ret);
75 typedef struct MpegTSSectionFilter {
82 unsigned int check_crc : 1;
83 unsigned int end_of_section_reached : 1;
84 SectionCallback *section_cb;
86 } MpegTSSectionFilter;
91 int last_cc; /* last cc code (-1 if first packet) */
93 enum MpegTSFilterType type;
95 MpegTSPESFilter pes_filter;
96 MpegTSSectionFilter section_filter;
100 #define MAX_PIDS_PER_PROGRAM 64
102 unsigned int id; // program id/service id
103 unsigned int nb_pids;
104 unsigned int pids[MAX_PIDS_PER_PROGRAM];
106 /** have we found pmt for this program */
110 struct MpegTSContext {
111 const AVClass *class;
113 AVFormatContext *stream;
114 /** raw packet size, including FEC if present */
119 #define SIZE_STAT_THRESHOLD 10
123 /** if true, all pids are analyzed to find streams */
126 /** compute exact PCR for each transport stream packet */
127 int mpeg2ts_compute_pcr;
129 /** fix dvb teletext pts */
130 int fix_teletext_pts;
132 int64_t cur_pcr; /**< used to estimate the exact PCR */
133 int pcr_incr; /**< used to estimate the exact PCR */
135 /* data needed to handle file based ts */
136 /** stop parsing loop */
138 /** packet containing Audio/Video data */
140 /** to detect seek */
150 /******************************************/
151 /* private mpegts data */
153 /** structure to keep track of Program->pids mapping */
157 int8_t crc_validity[NB_PID_MAX];
158 /** filters for various streams specified by PMT + for the PAT and PMT */
159 MpegTSFilter *pids[NB_PID_MAX];
163 #define MPEGTS_OPTIONS \
164 { "resync_size", "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 }
166 static const AVOption options[] = {
168 {"fix_teletext_pts", "Try to fix pts values of dvb teletext streams.", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_INT,
169 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
170 {"ts_packetsize", "Output option carrying the raw packet size.", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
171 {.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
172 {"scan_all_pmts", "Scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_INT,
173 { .i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
174 {"skip_changes", "Skip changing / adding streams / programs.", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_INT,
175 {.i64 = 0}, 0, 1, 0 },
176 {"skip_clear", "Skip clearing programs.", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_INT,
177 {.i64 = 0}, 0, 1, 0 },
181 static const AVClass mpegts_class = {
182 .class_name = "mpegts demuxer",
183 .item_name = av_default_item_name,
185 .version = LIBAVUTIL_VERSION_INT,
188 static const AVOption raw_options[] = {
190 { "compute_pcr", "Compute exact PCR for each transport stream packet.",
191 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT,
192 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
193 { "ts_packetsize", "Output option carrying the raw packet size.",
194 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
196 AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
200 static const AVClass mpegtsraw_class = {
201 .class_name = "mpegtsraw demuxer",
202 .item_name = av_default_item_name,
203 .option = raw_options,
204 .version = LIBAVUTIL_VERSION_INT,
207 /* TS stream handling */
212 MPEGTS_PESHEADER_FILL,
217 /* enough for PES header + length */
218 #define PES_START_SIZE 6
219 #define PES_HEADER_SIZE 9
220 #define MAX_PES_HEADER_SIZE (9 + 255)
222 typedef struct PESContext {
224 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
227 AVFormatContext *stream;
229 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
230 enum MpegTSState state;
231 /* used to get the format */
233 int flags; /**< copied to the AVPacket flags */
236 int extended_stream_id;
238 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
239 uint8_t header[MAX_PES_HEADER_SIZE];
244 extern AVInputFormat ff_mpegts_demuxer;
246 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
249 for (i = 0; i < ts->nb_prg; i++) {
250 if (ts->prg[i].id == programid) {
257 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
259 AVProgram *prg = NULL;
262 for (i = 0; i < ts->stream->nb_programs; i++)
263 if (ts->stream->programs[i]->id == programid) {
264 prg = ts->stream->programs[i];
269 prg->nb_stream_indexes = 0;
272 static void clear_program(MpegTSContext *ts, unsigned int programid)
276 clear_avprogram(ts, programid);
277 for (i = 0; i < ts->nb_prg; i++)
278 if (ts->prg[i].id == programid) {
279 ts->prg[i].nb_pids = 0;
280 ts->prg[i].pmt_found = 0;
284 static void clear_programs(MpegTSContext *ts)
290 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
293 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
297 p = &ts->prg[ts->nb_prg];
304 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
307 struct Program *p = get_program(ts, programid);
312 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
315 for (i = 0; i < p->nb_pids; i++)
316 if (p->pids[i] == pid)
319 p->pids[p->nb_pids++] = pid;
322 static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
324 struct Program *p = get_program(ts, programid);
331 static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
334 for (i = 0; i < s->nb_programs; i++) {
335 if (s->programs[i]->id == programid) {
336 s->programs[i]->pcr_pid = pid;
343 * @brief discard_pid() decides if the pid is to be discarded according
344 * to caller's programs selection
345 * @param ts : - TS context
347 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
350 static int discard_pid(MpegTSContext *ts, unsigned int pid)
353 int used = 0, discarded = 0;
356 /* If none of the programs have .discard=AVDISCARD_ALL then there's
357 * no way we have to discard this packet */
358 for (k = 0; k < ts->stream->nb_programs; k++)
359 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
361 if (k == ts->stream->nb_programs)
364 for (i = 0; i < ts->nb_prg; i++) {
366 for (j = 0; j < p->nb_pids; j++) {
367 if (p->pids[j] != pid)
369 // is program with id p->id set to be discarded?
370 for (k = 0; k < ts->stream->nb_programs; k++) {
371 if (ts->stream->programs[k]->id == p->id) {
372 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
381 return !used && discarded;
385 * Assemble PES packets out of TS packets, and then call the "section_cb"
386 * function when they are complete.
388 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
389 const uint8_t *buf, int buf_size, int is_start)
391 MpegTSSectionFilter *tss = &tss1->u.section_filter;
395 memcpy(tss->section_buf, buf, buf_size);
396 tss->section_index = buf_size;
397 tss->section_h_size = -1;
398 tss->end_of_section_reached = 0;
400 if (tss->end_of_section_reached)
402 len = 4096 - tss->section_index;
405 memcpy(tss->section_buf + tss->section_index, buf, len);
406 tss->section_index += len;
409 /* compute section length if possible */
410 if (tss->section_h_size == -1 && tss->section_index >= 3) {
411 len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
414 tss->section_h_size = len;
417 if (tss->section_h_size != -1 &&
418 tss->section_index >= tss->section_h_size) {
420 tss->end_of_section_reached = 1;
422 if (tss->check_crc) {
423 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, tss->section_buf, tss->section_h_size);
424 if (tss->section_h_size >= 4)
425 tss->crc = AV_RB32(tss->section_buf + tss->section_h_size - 4);
428 ts->crc_validity[ tss1->pid ] = 100;
429 }else if (ts->crc_validity[ tss1->pid ] > -10) {
430 ts->crc_validity[ tss1->pid ]--;
435 tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
442 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
443 enum MpegTSFilterType type)
445 MpegTSFilter *filter;
447 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x\n", pid);
449 if (pid >= NB_PID_MAX || ts->pids[pid])
451 filter = av_mallocz(sizeof(MpegTSFilter));
454 ts->pids[pid] = filter;
459 filter->last_cc = -1;
460 filter->last_pcr= -1;
465 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
467 SectionCallback *section_cb,
471 MpegTSFilter *filter;
472 MpegTSSectionFilter *sec;
474 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
476 sec = &filter->u.section_filter;
477 sec->section_cb = section_cb;
478 sec->opaque = opaque;
479 sec->section_buf = av_malloc(MAX_SECTION_SIZE);
480 sec->check_crc = check_crc;
483 if (!sec->section_buf) {
490 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
494 MpegTSFilter *filter;
495 MpegTSPESFilter *pes;
497 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
500 pes = &filter->u.pes_filter;
501 pes->pes_cb = pes_cb;
502 pes->opaque = opaque;
506 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
508 return mpegts_open_filter(ts, pid, MPEGTS_PCR);
511 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
516 if (filter->type == MPEGTS_SECTION)
517 av_freep(&filter->u.section_filter.section_buf);
518 else if (filter->type == MPEGTS_PES) {
519 PESContext *pes = filter->u.pes_filter.opaque;
520 av_buffer_unref(&pes->buffer);
521 /* referenced private data will be freed later in
522 * avformat_close_input */
523 if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
524 av_freep(&filter->u.pes_filter.opaque);
529 ts->pids[pid] = NULL;
532 static int analyze(const uint8_t *buf, int size, int packet_size, int *index,
535 int stat[TS_MAX_PACKET_SIZE];
540 memset(stat, 0, packet_size * sizeof(*stat));
542 for (i = 0; i < size - 3; i++) {
543 if (buf[i] == 0x47 &&
544 (!probe || (!(buf[i + 1] & 0x80) && buf[i + 3] != 0x47))) {
545 int x = i % packet_size;
548 if (stat[x] > best_score) {
549 best_score = stat[x];
556 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
559 /* autodetect fec presence. Must have at least 1024 bytes */
560 static int get_packet_size(const uint8_t *buf, int size)
562 int score, fec_score, dvhs_score;
564 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
565 return AVERROR_INVALIDDATA;
567 score = analyze(buf, size, TS_PACKET_SIZE, NULL, 0);
568 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL, 0);
569 fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, NULL, 0);
570 av_log(NULL, AV_LOG_TRACE, "score: %d, dvhs_score: %d, fec_score: %d \n",
571 score, dvhs_score, fec_score);
573 if (score > fec_score && score > dvhs_score)
574 return TS_PACKET_SIZE;
575 else if (dvhs_score > score && dvhs_score > fec_score)
576 return TS_DVHS_PACKET_SIZE;
577 else if (score < fec_score && dvhs_score < fec_score)
578 return TS_FEC_PACKET_SIZE;
580 return AVERROR_INVALIDDATA;
583 typedef struct SectionHeader {
588 uint8_t last_sec_num;
591 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
593 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
596 tssf->last_ver = h->version;
597 tssf->last_crc = tssf->crc;
602 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
609 return AVERROR_INVALIDDATA;
615 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
622 return AVERROR_INVALIDDATA;
629 /* read and allocate a DVB string preceded by its length */
630 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
637 len = get8(&p, p_end);
642 str = av_malloc(len + 1);
652 static int parse_section_header(SectionHeader *h,
653 const uint8_t **pp, const uint8_t *p_end)
657 val = get8(pp, p_end);
662 val = get16(pp, p_end);
666 val = get8(pp, p_end);
669 h->version = (val >> 1) & 0x1f;
670 val = get8(pp, p_end);
674 val = get8(pp, p_end);
677 h->last_sec_num = val;
681 typedef struct StreamType {
682 uint32_t stream_type;
683 enum AVMediaType codec_type;
684 enum AVCodecID codec_id;
687 static const StreamType ISO_types[] = {
688 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
689 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
690 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
691 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
692 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
693 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
694 /* Makito encoder sets stream type 0x11 for AAC,
695 * so auto-detect LOAS/LATM instead of hardcoding it. */
696 #if !CONFIG_LOAS_DEMUXER
697 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
699 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
700 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
701 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
702 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
703 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
704 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
705 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
709 static const StreamType HDMV_types[] = {
710 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
711 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
712 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
713 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
714 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
715 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
716 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
717 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
718 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
719 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
724 static const StreamType MISC_types[] = {
725 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
726 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
730 static const StreamType REGD_types[] = {
731 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
732 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
733 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
734 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
735 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
736 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
737 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
738 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
739 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
740 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
744 static const StreamType METADATA_types[] = {
745 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
746 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
750 /* descriptor present */
751 static const StreamType DESC_types[] = {
752 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
753 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
754 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
755 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
756 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
760 static void mpegts_find_stream_type(AVStream *st,
761 uint32_t stream_type,
762 const StreamType *types)
764 if (avcodec_is_open(st->codec)) {
765 av_log(NULL, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
769 for (; types->stream_type; types++)
770 if (stream_type == types->stream_type) {
771 st->codec->codec_type = types->codec_type;
772 st->codec->codec_id = types->codec_id;
773 st->request_probe = 0;
778 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
779 uint32_t stream_type, uint32_t prog_reg_desc)
781 int old_codec_type = st->codec->codec_type;
782 int old_codec_id = st->codec->codec_id;
784 if (avcodec_is_open(st->codec)) {
785 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
789 avpriv_set_pts_info(st, 33, 1, 90000);
791 st->codec->codec_type = AVMEDIA_TYPE_DATA;
792 st->codec->codec_id = AV_CODEC_ID_NONE;
793 st->need_parsing = AVSTREAM_PARSE_FULL;
795 pes->stream_type = stream_type;
797 av_log(pes->stream, AV_LOG_DEBUG,
798 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
799 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
801 st->codec->codec_tag = pes->stream_type;
803 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
804 if ((prog_reg_desc == AV_RL32("HDMV") ||
805 prog_reg_desc == AV_RL32("HDPR")) &&
806 st->codec->codec_id == AV_CODEC_ID_NONE) {
807 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
808 if (pes->stream_type == 0x83) {
809 // HDMV TrueHD streams also contain an AC3 coded version of the
810 // audio track - add a second stream for this
812 // priv_data cannot be shared between streams
813 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
815 return AVERROR(ENOMEM);
816 memcpy(sub_pes, pes, sizeof(*sub_pes));
818 sub_st = avformat_new_stream(pes->stream, NULL);
821 return AVERROR(ENOMEM);
824 sub_st->id = pes->pid;
825 avpriv_set_pts_info(sub_st, 33, 1, 90000);
826 sub_st->priv_data = sub_pes;
827 sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
828 sub_st->codec->codec_id = AV_CODEC_ID_AC3;
829 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
830 sub_pes->sub_st = pes->sub_st = sub_st;
833 if (st->codec->codec_id == AV_CODEC_ID_NONE)
834 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
835 if (st->codec->codec_id == AV_CODEC_ID_NONE) {
836 st->codec->codec_id = old_codec_id;
837 st->codec->codec_type = old_codec_type;
839 if ((st->codec->codec_id == AV_CODEC_ID_NONE ||
840 (st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
841 !avcodec_is_open(st->codec) &&
842 stream_type == STREAM_TYPE_PRIVATE_DATA) {
843 st->codec->codec_type = AVMEDIA_TYPE_DATA;
844 st->codec->codec_id = AV_CODEC_ID_BIN_DATA;
845 st->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
851 static void reset_pes_packet_state(PESContext *pes)
853 pes->pts = AV_NOPTS_VALUE;
854 pes->dts = AV_NOPTS_VALUE;
857 av_buffer_unref(&pes->buffer);
860 static void new_pes_packet(PESContext *pes, AVPacket *pkt)
864 pkt->buf = pes->buffer;
865 pkt->data = pes->buffer->data;
866 pkt->size = pes->data_index;
868 if (pes->total_size != MAX_PES_PAYLOAD &&
869 pes->pes_header_size + pes->data_index != pes->total_size +
871 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
872 pes->flags |= AV_PKT_FLAG_CORRUPT;
874 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
876 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
877 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
878 pkt->stream_index = pes->sub_st->index;
880 pkt->stream_index = pes->st->index;
883 /* store position of first TS packet of this PES packet */
884 pkt->pos = pes->ts_packet_pos;
885 pkt->flags = pes->flags;
888 reset_pes_packet_state(pes);
891 static uint64_t get_ts64(GetBitContext *gb, int bits)
893 if (get_bits_left(gb) < bits)
894 return AV_NOPTS_VALUE;
895 return get_bits64(gb, bits);
898 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
899 const uint8_t *buf, int buf_size)
902 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
903 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
904 int dts_flag = -1, cts_flag = -1;
905 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
906 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
907 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
909 memcpy(buf_padded, buf, buf_padded_size);
911 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
913 if (sl->use_au_start)
914 au_start_flag = get_bits1(&gb);
916 au_end_flag = get_bits1(&gb);
917 if (!sl->use_au_start && !sl->use_au_end)
918 au_start_flag = au_end_flag = 1;
920 ocr_flag = get_bits1(&gb);
922 idle_flag = get_bits1(&gb);
924 padding_flag = get_bits1(&gb);
926 padding_bits = get_bits(&gb, 3);
928 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
929 if (sl->packet_seq_num_len)
930 skip_bits_long(&gb, sl->packet_seq_num_len);
931 if (sl->degr_prior_len)
933 skip_bits(&gb, sl->degr_prior_len);
935 skip_bits_long(&gb, sl->ocr_len);
937 if (sl->use_rand_acc_pt)
939 if (sl->au_seq_num_len > 0)
940 skip_bits_long(&gb, sl->au_seq_num_len);
941 if (sl->use_timestamps) {
942 dts_flag = get_bits1(&gb);
943 cts_flag = get_bits1(&gb);
946 if (sl->inst_bitrate_len)
947 inst_bitrate_flag = get_bits1(&gb);
949 dts = get_ts64(&gb, sl->timestamp_len);
951 cts = get_ts64(&gb, sl->timestamp_len);
953 skip_bits_long(&gb, sl->au_len);
954 if (inst_bitrate_flag)
955 skip_bits_long(&gb, sl->inst_bitrate_len);
958 if (dts != AV_NOPTS_VALUE)
960 if (cts != AV_NOPTS_VALUE)
963 if (sl->timestamp_len && sl->timestamp_res)
964 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
966 return (get_bits_count(&gb) + 7) >> 3;
969 /* return non zero if a packet could be constructed */
970 static int mpegts_push_data(MpegTSFilter *filter,
971 const uint8_t *buf, int buf_size, int is_start,
974 PESContext *pes = filter->u.pes_filter.opaque;
975 MpegTSContext *ts = pes->ts;
983 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
984 new_pes_packet(pes, ts->pkt);
987 reset_pes_packet_state(pes);
989 pes->state = MPEGTS_HEADER;
990 pes->ts_packet_pos = pos;
993 while (buf_size > 0) {
994 switch (pes->state) {
996 len = PES_START_SIZE - pes->data_index;
999 memcpy(pes->header + pes->data_index, p, len);
1000 pes->data_index += len;
1003 if (pes->data_index == PES_START_SIZE) {
1004 /* we got all the PES or section header. We can now
1006 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1007 pes->header[2] == 0x01) {
1008 /* it must be an mpeg2 PES stream */
1009 code = pes->header[3] | 0x100;
1010 av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1013 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1015 pes->sub_st->discard == AVDISCARD_ALL)) ||
1016 code == 0x1be) /* padding_stream */
1019 /* stream not present in PMT */
1021 if (ts->skip_changes)
1024 pes->st = avformat_new_stream(ts->stream, NULL);
1026 return AVERROR(ENOMEM);
1027 pes->st->id = pes->pid;
1028 mpegts_set_stream_info(pes->st, pes, 0, 0);
1031 pes->total_size = AV_RB16(pes->header + 4);
1032 /* NOTE: a zero total size means the PES size is
1034 if (!pes->total_size)
1035 pes->total_size = MAX_PES_PAYLOAD;
1037 /* allocate pes buffer */
1038 pes->buffer = av_buffer_alloc(pes->total_size +
1039 AV_INPUT_BUFFER_PADDING_SIZE);
1041 return AVERROR(ENOMEM);
1043 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1044 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1045 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1046 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1047 pes->state = MPEGTS_PESHEADER;
1048 if (pes->st->codec->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1049 av_log(pes->stream, AV_LOG_TRACE,
1050 "pid=%x stream_type=%x probing\n",
1053 pes->st->request_probe = 1;
1056 pes->state = MPEGTS_PAYLOAD;
1057 pes->data_index = 0;
1060 /* otherwise, it should be a table */
1063 pes->state = MPEGTS_SKIP;
1068 /**********************************************/
1069 /* PES packing parsing */
1070 case MPEGTS_PESHEADER:
1071 len = PES_HEADER_SIZE - pes->data_index;
1073 return AVERROR_INVALIDDATA;
1076 memcpy(pes->header + pes->data_index, p, len);
1077 pes->data_index += len;
1080 if (pes->data_index == PES_HEADER_SIZE) {
1081 pes->pes_header_size = pes->header[8] + 9;
1082 pes->state = MPEGTS_PESHEADER_FILL;
1085 case MPEGTS_PESHEADER_FILL:
1086 len = pes->pes_header_size - pes->data_index;
1088 return AVERROR_INVALIDDATA;
1091 memcpy(pes->header + pes->data_index, p, len);
1092 pes->data_index += len;
1095 if (pes->data_index == pes->pes_header_size) {
1097 unsigned int flags, pes_ext, skip;
1099 flags = pes->header[7];
1100 r = pes->header + 9;
1101 pes->pts = AV_NOPTS_VALUE;
1102 pes->dts = AV_NOPTS_VALUE;
1103 if ((flags & 0xc0) == 0x80) {
1104 pes->dts = pes->pts = ff_parse_pes_pts(r);
1106 } else if ((flags & 0xc0) == 0xc0) {
1107 pes->pts = ff_parse_pes_pts(r);
1109 pes->dts = ff_parse_pes_pts(r);
1112 pes->extended_stream_id = -1;
1113 if (flags & 0x01) { /* PES extension */
1115 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1116 skip = (pes_ext >> 4) & 0xb;
1119 if ((pes_ext & 0x41) == 0x01 &&
1120 (r + 2) <= (pes->header + pes->pes_header_size)) {
1121 /* PES extension 2 */
1122 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1123 pes->extended_stream_id = r[1];
1127 /* we got the full header. We parse it and get the payload */
1128 pes->state = MPEGTS_PAYLOAD;
1129 pes->data_index = 0;
1130 if (pes->stream_type == 0x12 && buf_size > 0) {
1131 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1133 pes->pes_header_size += sl_header_bytes;
1134 p += sl_header_bytes;
1135 buf_size -= sl_header_bytes;
1137 if (pes->stream_type == 0x15 && buf_size >= 5) {
1138 /* skip metadata access unit header */
1139 pes->pes_header_size += 5;
1143 if ( pes->ts->fix_teletext_pts
1144 && ( pes->st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT
1145 || pes->st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1147 AVProgram *p = NULL;
1148 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1149 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1150 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1152 AVStream *st = NULL;
1153 if (f->type == MPEGTS_PES) {
1154 PESContext *pcrpes = f->u.pes_filter.opaque;
1157 } else if (f->type == MPEGTS_PCR) {
1159 for (i = 0; i < p->nb_stream_indexes; i++) {
1160 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1161 if (pst->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1165 if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1166 // teletext packets do not always have correct timestamps,
1167 // the standard says they should be handled after 40.6 ms at most,
1168 // and the pcr error to this packet should be no more than 100 ms.
1169 // TODO: we should interpolate the PCR, not just use the last one
1170 int64_t pcr = f->last_pcr / 300;
1171 pes->st->pts_wrap_reference = st->pts_wrap_reference;
1172 pes->st->pts_wrap_behavior = st->pts_wrap_behavior;
1173 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1174 pes->pts = pes->dts = pcr;
1175 } else if (pes->st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1176 pes->dts > pcr + 3654 + 9000) {
1177 pes->pts = pes->dts = pcr + 3654 + 9000;
1178 } else if (pes->st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1179 pes->dts > pcr + 10*90000) { //10sec
1180 pes->pts = pes->dts = pcr + 3654 + 9000;
1190 case MPEGTS_PAYLOAD:
1192 if (pes->data_index > 0 &&
1193 pes->data_index + buf_size > pes->total_size) {
1194 new_pes_packet(pes, ts->pkt);
1195 pes->total_size = MAX_PES_PAYLOAD;
1196 pes->buffer = av_buffer_alloc(pes->total_size +
1197 AV_INPUT_BUFFER_PADDING_SIZE);
1199 return AVERROR(ENOMEM);
1201 } else if (pes->data_index == 0 &&
1202 buf_size > pes->total_size) {
1203 // pes packet size is < ts size packet and pes data is padded with 0xff
1204 // not sure if this is legal in ts but see issue #2392
1205 buf_size = pes->total_size;
1207 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1208 pes->data_index += buf_size;
1209 /* emit complete packets with known packet size
1210 * decreases demuxer delay for infrequent packets like subtitles from
1211 * a couple of seconds to milliseconds for properly muxed files.
1212 * total_size is the number of bytes following pes_packet_length
1213 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1214 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1215 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1217 new_pes_packet(pes, ts->pkt);
1231 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1236 /* if no pid found, then add a pid context */
1237 pes = av_mallocz(sizeof(PESContext));
1241 pes->stream = ts->stream;
1243 pes->pcr_pid = pcr_pid;
1244 pes->state = MPEGTS_SKIP;
1245 pes->pts = AV_NOPTS_VALUE;
1246 pes->dts = AV_NOPTS_VALUE;
1247 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1256 typedef struct MP4DescrParseContext {
1260 Mp4Descr *active_descr;
1262 int max_descr_count;
1264 int predefined_SLConfigDescriptor_seen;
1265 } MP4DescrParseContext;
1267 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1268 const uint8_t *buf, unsigned size,
1269 Mp4Descr *descr, int max_descr_count)
1272 if (size > (1 << 30))
1273 return AVERROR_INVALIDDATA;
1275 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1276 NULL, NULL, NULL, NULL)) < 0)
1283 d->active_descr = NULL;
1284 d->max_descr_count = max_descr_count;
1289 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1291 int64_t new_off = avio_tell(pb);
1292 (*len) -= new_off - *off;
1296 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1299 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1302 int ret = parse_mp4_descr(d, off, len, 0);
1305 update_offsets(&d->pb, &off, &len);
1310 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1312 avio_rb16(&d->pb); // ID
1318 update_offsets(&d->pb, &off, &len);
1319 return parse_mp4_descr_arr(d, off, len);
1322 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1327 id_flags = avio_rb16(&d->pb);
1328 if (!(id_flags & 0x0020)) { // URL_Flag
1329 update_offsets(&d->pb, &off, &len);
1330 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1336 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1339 if (d->descr_count >= d->max_descr_count)
1340 return AVERROR_INVALIDDATA;
1341 ff_mp4_parse_es_descr(&d->pb, &es_id);
1342 d->active_descr = d->descr + (d->descr_count++);
1344 d->active_descr->es_id = es_id;
1345 update_offsets(&d->pb, &off, &len);
1346 parse_mp4_descr(d, off, len, MP4DecConfigDescrTag);
1347 update_offsets(&d->pb, &off, &len);
1349 parse_mp4_descr(d, off, len, MP4SLDescrTag);
1350 d->active_descr = NULL;
1354 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1357 Mp4Descr *descr = d->active_descr;
1359 return AVERROR_INVALIDDATA;
1360 d->active_descr->dec_config_descr = av_malloc(len);
1361 if (!descr->dec_config_descr)
1362 return AVERROR(ENOMEM);
1363 descr->dec_config_descr_len = len;
1364 avio_read(&d->pb, descr->dec_config_descr, len);
1368 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1370 Mp4Descr *descr = d->active_descr;
1373 return AVERROR_INVALIDDATA;
1375 predefined = avio_r8(&d->pb);
1378 int flags = avio_r8(&d->pb);
1379 descr->sl.use_au_start = !!(flags & 0x80);
1380 descr->sl.use_au_end = !!(flags & 0x40);
1381 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1382 descr->sl.use_padding = !!(flags & 0x08);
1383 descr->sl.use_timestamps = !!(flags & 0x04);
1384 descr->sl.use_idle = !!(flags & 0x02);
1385 descr->sl.timestamp_res = avio_rb32(&d->pb);
1387 descr->sl.timestamp_len = avio_r8(&d->pb);
1388 if (descr->sl.timestamp_len > 64) {
1389 avpriv_request_sample(NULL, "timestamp_len > 64");
1390 descr->sl.timestamp_len = 64;
1391 return AVERROR_PATCHWELCOME;
1393 descr->sl.ocr_len = avio_r8(&d->pb);
1394 descr->sl.au_len = avio_r8(&d->pb);
1395 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1396 lengths = avio_rb16(&d->pb);
1397 descr->sl.degr_prior_len = lengths >> 12;
1398 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1399 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1400 } else if (!d->predefined_SLConfigDescriptor_seen){
1401 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1402 d->predefined_SLConfigDescriptor_seen = 1;
1407 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1411 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1412 update_offsets(&d->pb, &off, &len);
1413 if (len < 0 || len1 > len || len1 <= 0) {
1414 av_log(d->s, AV_LOG_ERROR,
1415 "Tag %x length violation new length %d bytes remaining %d\n",
1417 return AVERROR_INVALIDDATA;
1420 if (d->level++ >= MAX_LEVEL) {
1421 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1425 if (target_tag && tag != target_tag) {
1426 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1433 parse_MP4IODescrTag(d, off, len1);
1436 parse_MP4ODescrTag(d, off, len1);
1439 parse_MP4ESDescrTag(d, off, len1);
1441 case MP4DecConfigDescrTag:
1442 parse_MP4DecConfigDescrTag(d, off, len1);
1445 parse_MP4SLDescrTag(d, off, len1);
1452 avio_seek(&d->pb, off + len1, SEEK_SET);
1456 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1457 Mp4Descr *descr, int *descr_count, int max_descr_count)
1459 MP4DescrParseContext d;
1462 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1466 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1468 *descr_count = d.descr_count;
1472 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1473 Mp4Descr *descr, int *descr_count, int max_descr_count)
1475 MP4DescrParseContext d;
1478 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1482 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1484 *descr_count = d.descr_count;
1488 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1491 MpegTSContext *ts = filter->u.section_filter.opaque;
1492 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1494 const uint8_t *p, *p_end;
1496 int mp4_descr_count = 0;
1497 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1499 AVFormatContext *s = ts->stream;
1501 p_end = section + section_len - 4;
1503 if (parse_section_header(&h, &p, p_end) < 0)
1505 if (h.tid != M4OD_TID)
1507 if (skip_identical(&h, tssf))
1510 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1511 MAX_MP4_DESCR_COUNT);
1513 for (pid = 0; pid < NB_PID_MAX; pid++) {
1516 for (i = 0; i < mp4_descr_count; i++) {
1519 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1521 if (ts->pids[pid]->type != MPEGTS_PES) {
1522 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1525 pes = ts->pids[pid]->u.pes_filter.opaque;
1530 pes->sl = mp4_descr[i].sl;
1532 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1533 mp4_descr[i].dec_config_descr_len, 0,
1534 NULL, NULL, NULL, NULL);
1535 ff_mp4_read_dec_config_descr(s, st, &pb);
1536 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1537 st->codec->extradata_size > 0)
1538 st->need_parsing = 0;
1539 if (st->codec->codec_id == AV_CODEC_ID_H264 &&
1540 st->codec->extradata_size > 0)
1541 st->need_parsing = 0;
1543 if (st->codec->codec_id <= AV_CODEC_ID_NONE) {
1545 } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_AUDIO)
1546 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1547 else if (st->codec->codec_id < AV_CODEC_ID_FIRST_SUBTITLE)
1548 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1549 else if (st->codec->codec_id < AV_CODEC_ID_FIRST_UNKNOWN)
1550 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1553 for (i = 0; i < mp4_descr_count; i++)
1554 av_free(mp4_descr[i].dec_config_descr);
1557 static const uint8_t opus_coupled_stream_cnt[9] = {
1558 1, 0, 1, 1, 2, 2, 2, 3, 3
1561 static const uint8_t opus_stream_cnt[9] = {
1562 1, 1, 1, 2, 2, 3, 4, 4, 5,
1565 static const uint8_t opus_channel_map[8][8] = {
1573 { 0,6,1,2,3,4,5,7 },
1576 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1577 const uint8_t **pp, const uint8_t *desc_list_end,
1578 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1581 const uint8_t *desc_end;
1582 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1586 desc_tag = get8(pp, desc_list_end);
1588 return AVERROR_INVALIDDATA;
1589 desc_len = get8(pp, desc_list_end);
1591 return AVERROR_INVALIDDATA;
1592 desc_end = *pp + desc_len;
1593 if (desc_end > desc_list_end)
1594 return AVERROR_INVALIDDATA;
1596 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1598 if ((st->codec->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1599 stream_type == STREAM_TYPE_PRIVATE_DATA)
1600 mpegts_find_stream_type(st, desc_tag, DESC_types);
1603 case 0x1E: /* SL descriptor */
1604 desc_es_id = get16(pp, desc_end);
1607 if (ts && ts->pids[pid])
1608 ts->pids[pid]->es_id = desc_es_id;
1609 for (i = 0; i < mp4_descr_count; i++)
1610 if (mp4_descr[i].dec_config_descr_len &&
1611 mp4_descr[i].es_id == desc_es_id) {
1613 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1614 mp4_descr[i].dec_config_descr_len, 0,
1615 NULL, NULL, NULL, NULL);
1616 ff_mp4_read_dec_config_descr(fc, st, &pb);
1617 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1618 st->codec->extradata_size > 0)
1619 st->need_parsing = 0;
1620 if (st->codec->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1621 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1624 case 0x1F: /* FMC descriptor */
1625 if (get16(pp, desc_end) < 0)
1627 if (mp4_descr_count > 0 &&
1628 (st->codec->codec_id == AV_CODEC_ID_AAC_LATM ||
1629 (st->request_probe == 0 && st->codec->codec_id == AV_CODEC_ID_NONE) ||
1630 st->request_probe > 0) &&
1631 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1633 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1634 mp4_descr->dec_config_descr_len, 0,
1635 NULL, NULL, NULL, NULL);
1636 ff_mp4_read_dec_config_descr(fc, st, &pb);
1637 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1638 st->codec->extradata_size > 0) {
1639 st->request_probe = st->need_parsing = 0;
1640 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1644 case 0x56: /* DVB teletext descriptor */
1646 uint8_t *extradata = NULL;
1647 int language_count = desc_len / 5;
1649 if (desc_len > 0 && desc_len % 5 != 0)
1650 return AVERROR_INVALIDDATA;
1652 if (language_count > 0) {
1653 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1654 av_assert0(language_count <= sizeof(language) / 4);
1656 if (st->codec->extradata == NULL) {
1657 if (ff_alloc_extradata(st->codec, language_count * 2)) {
1658 return AVERROR(ENOMEM);
1662 if (st->codec->extradata_size < language_count * 2)
1663 return AVERROR_INVALIDDATA;
1665 extradata = st->codec->extradata;
1667 for (i = 0; i < language_count; i++) {
1668 language[i * 4 + 0] = get8(pp, desc_end);
1669 language[i * 4 + 1] = get8(pp, desc_end);
1670 language[i * 4 + 2] = get8(pp, desc_end);
1671 language[i * 4 + 3] = ',';
1673 memcpy(extradata, *pp, 2);
1679 language[i * 4 - 1] = 0;
1680 av_dict_set(&st->metadata, "language", language, 0);
1684 case 0x59: /* subtitling descriptor */
1686 /* 8 bytes per DVB subtitle substream data:
1687 * ISO_639_language_code (3 bytes),
1688 * subtitling_type (1 byte),
1689 * composition_page_id (2 bytes),
1690 * ancillary_page_id (2 bytes) */
1691 int language_count = desc_len / 8;
1693 if (desc_len > 0 && desc_len % 8 != 0)
1694 return AVERROR_INVALIDDATA;
1696 if (language_count > 1) {
1697 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1700 if (language_count > 0) {
1703 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1704 av_assert0(language_count <= sizeof(language) / 4);
1706 if (st->codec->extradata == NULL) {
1707 if (ff_alloc_extradata(st->codec, language_count * 5)) {
1708 return AVERROR(ENOMEM);
1712 if (st->codec->extradata_size < language_count * 5)
1713 return AVERROR_INVALIDDATA;
1715 extradata = st->codec->extradata;
1717 for (i = 0; i < language_count; i++) {
1718 language[i * 4 + 0] = get8(pp, desc_end);
1719 language[i * 4 + 1] = get8(pp, desc_end);
1720 language[i * 4 + 2] = get8(pp, desc_end);
1721 language[i * 4 + 3] = ',';
1723 /* hearing impaired subtitles detection using subtitling_type */
1725 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1726 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1727 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1728 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1729 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1730 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1731 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1735 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1736 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1742 language[i * 4 - 1] = 0;
1743 av_dict_set(&st->metadata, "language", language, 0);
1747 case 0x0a: /* ISO 639 language descriptor */
1748 for (i = 0; i + 4 <= desc_len; i += 4) {
1749 language[i + 0] = get8(pp, desc_end);
1750 language[i + 1] = get8(pp, desc_end);
1751 language[i + 2] = get8(pp, desc_end);
1752 language[i + 3] = ',';
1753 switch (get8(pp, desc_end)) {
1755 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1758 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1761 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1765 if (i && language[0]) {
1766 language[i - 1] = 0;
1767 av_dict_set(&st->metadata, "language", language, 0);
1770 case 0x05: /* registration descriptor */
1771 st->codec->codec_tag = bytestream_get_le32(pp);
1772 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codec->codec_tag);
1773 if (st->codec->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0)
1774 mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
1776 case 0x52: /* stream identifier descriptor */
1777 st->stream_identifier = 1 + get8(pp, desc_end);
1779 case 0x26: /* metadata descriptor */
1780 if (get16(pp, desc_end) == 0xFFFF)
1782 if (get8(pp, desc_end) == 0xFF) {
1783 st->codec->codec_tag = bytestream_get_le32(pp);
1784 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1785 mpegts_find_stream_type(st, st->codec->codec_tag, METADATA_types);
1788 case 0x7f: /* DVB extension descriptor */
1789 ext_desc_tag = get8(pp, desc_end);
1790 if (ext_desc_tag < 0)
1791 return AVERROR_INVALIDDATA;
1792 if (st->codec->codec_id == AV_CODEC_ID_OPUS &&
1793 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1794 if (!st->codec->extradata) {
1795 st->codec->extradata = av_mallocz(sizeof(opus_default_extradata) +
1796 AV_INPUT_BUFFER_PADDING_SIZE);
1797 if (!st->codec->extradata)
1798 return AVERROR(ENOMEM);
1800 st->codec->extradata_size = sizeof(opus_default_extradata);
1801 memcpy(st->codec->extradata, opus_default_extradata, sizeof(opus_default_extradata));
1803 channel_config_code = get8(pp, desc_end);
1804 if (channel_config_code < 0)
1805 return AVERROR_INVALIDDATA;
1806 if (channel_config_code <= 0x8) {
1807 st->codec->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1808 st->codec->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
1809 st->codec->extradata[19] = opus_stream_cnt[channel_config_code];
1810 st->codec->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1811 memcpy(&st->codec->extradata[21], opus_channel_map[channels - 1], channels);
1813 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1815 st->need_parsing = AVSTREAM_PARSE_FULL;
1826 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1828 MpegTSContext *ts = filter->u.section_filter.opaque;
1829 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1830 SectionHeader h1, *h = &h1;
1833 const uint8_t *p, *p_end, *desc_list_end;
1834 int program_info_length, pcr_pid, pid, stream_type;
1836 uint32_t prog_reg_desc = 0; /* registration descriptor */
1838 int mp4_descr_count = 0;
1839 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1842 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
1843 hex_dump_debug(ts->stream, section, section_len);
1845 p_end = section + section_len - 4;
1847 if (parse_section_header(h, &p, p_end) < 0)
1849 if (skip_identical(h, tssf))
1852 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d\n",
1853 h->id, h->sec_num, h->last_sec_num, h->version);
1855 if (h->tid != PMT_TID)
1857 if (!ts->scan_all_pmts && ts->skip_changes)
1860 if (!ts->skip_clear)
1861 clear_program(ts, h->id);
1863 pcr_pid = get16(&p, p_end);
1867 add_pid_to_pmt(ts, h->id, pcr_pid);
1868 set_pcr_pid(ts->stream, h->id, pcr_pid);
1870 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
1872 program_info_length = get16(&p, p_end);
1873 if (program_info_length < 0)
1875 program_info_length &= 0xfff;
1876 while (program_info_length >= 2) {
1878 tag = get8(&p, p_end);
1879 len = get8(&p, p_end);
1881 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
1883 if (len > program_info_length - 2)
1884 // something else is broken, exit the program_descriptors_loop
1886 program_info_length -= len + 2;
1887 if (tag == 0x1d) { // IOD descriptor
1888 get8(&p, p_end); // scope
1889 get8(&p, p_end); // label
1891 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
1892 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1893 } else if (tag == 0x05 && len >= 4) { // registration descriptor
1894 prog_reg_desc = bytestream_get_le32(&p);
1899 p += program_info_length;
1903 // stop parsing after pmt, we found header
1904 if (!ts->stream->nb_streams)
1907 set_pmt_found(ts, h->id);
1913 stream_type = get8(&p, p_end);
1914 if (stream_type < 0)
1916 pid = get16(&p, p_end);
1920 if (pid == ts->current_pid)
1923 /* now create stream */
1924 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
1925 pes = ts->pids[pid]->u.pes_filter.opaque;
1927 pes->st = avformat_new_stream(pes->stream, NULL);
1930 pes->st->id = pes->pid;
1933 } else if (stream_type != 0x13) {
1935 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
1936 pes = add_pes_stream(ts, pid, pcr_pid);
1938 st = avformat_new_stream(pes->stream, NULL);
1944 int idx = ff_find_stream_index(ts->stream, pid);
1946 st = ts->stream->streams[idx];
1948 st = avformat_new_stream(ts->stream, NULL);
1952 st->codec->codec_type = AVMEDIA_TYPE_DATA;
1959 if (pes && !pes->stream_type)
1960 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
1962 add_pid_to_pmt(ts, h->id, pid);
1964 ff_program_add_stream_index(ts->stream, h->id, st->index);
1966 desc_list_len = get16(&p, p_end);
1967 if (desc_list_len < 0)
1969 desc_list_len &= 0xfff;
1970 desc_list_end = p + desc_list_len;
1971 if (desc_list_end > p_end)
1974 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
1975 desc_list_end, mp4_descr,
1976 mp4_descr_count, pid, ts) < 0)
1979 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
1980 stream_type == 0x83 && pes->sub_st) {
1981 ff_program_add_stream_index(ts->stream, h->id,
1982 pes->sub_st->index);
1983 pes->sub_st->codec->codec_tag = st->codec->codec_tag;
1989 if (!ts->pids[pcr_pid])
1990 mpegts_open_pcr_filter(ts, pcr_pid);
1993 for (i = 0; i < mp4_descr_count; i++)
1994 av_free(mp4_descr[i].dec_config_descr);
1997 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1999 MpegTSContext *ts = filter->u.section_filter.opaque;
2000 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2001 SectionHeader h1, *h = &h1;
2002 const uint8_t *p, *p_end;
2006 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2007 hex_dump_debug(ts->stream, section, section_len);
2009 p_end = section + section_len - 4;
2011 if (parse_section_header(h, &p, p_end) < 0)
2013 if (h->tid != PAT_TID)
2015 if (ts->skip_changes)
2018 if (skip_identical(h, tssf))
2020 ts->stream->ts_id = h->id;
2024 sid = get16(&p, p_end);
2027 pmt_pid = get16(&p, p_end);
2032 if (pmt_pid == ts->current_pid)
2035 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2037 if (sid == 0x0000) {
2040 MpegTSFilter *fil = ts->pids[pmt_pid];
2041 program = av_new_program(ts->stream, sid);
2043 program->program_num = sid;
2044 program->pmt_pid = pmt_pid;
2047 if ( fil->type != MPEGTS_SECTION
2048 || fil->pid != pmt_pid
2049 || fil->u.section_filter.section_cb != pmt_cb)
2050 mpegts_close_filter(ts, ts->pids[pmt_pid]);
2052 if (!ts->pids[pmt_pid])
2053 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2054 add_pat_entry(ts, sid);
2055 add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2056 add_pid_to_pmt(ts, sid, pmt_pid);
2062 for (j=0; j<ts->stream->nb_programs; j++) {
2063 for (i = 0; i < ts->nb_prg; i++)
2064 if (ts->prg[i].id == ts->stream->programs[j]->id)
2066 if (i==ts->nb_prg && !ts->skip_clear)
2067 clear_avprogram(ts, ts->stream->programs[j]->id);
2072 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2074 MpegTSContext *ts = filter->u.section_filter.opaque;
2075 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2076 SectionHeader h1, *h = &h1;
2077 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2078 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2079 char *name, *provider_name;
2081 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2082 hex_dump_debug(ts->stream, section, section_len);
2084 p_end = section + section_len - 4;
2086 if (parse_section_header(h, &p, p_end) < 0)
2088 if (h->tid != SDT_TID)
2090 if (ts->skip_changes)
2092 if (skip_identical(h, tssf))
2095 onid = get16(&p, p_end);
2098 val = get8(&p, p_end);
2102 sid = get16(&p, p_end);
2105 val = get8(&p, p_end);
2108 desc_list_len = get16(&p, p_end);
2109 if (desc_list_len < 0)
2111 desc_list_len &= 0xfff;
2112 desc_list_end = p + desc_list_len;
2113 if (desc_list_end > p_end)
2116 desc_tag = get8(&p, desc_list_end);
2119 desc_len = get8(&p, desc_list_end);
2120 desc_end = p + desc_len;
2121 if (desc_len < 0 || desc_end > desc_list_end)
2124 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2125 desc_tag, desc_len);
2129 service_type = get8(&p, p_end);
2130 if (service_type < 0)
2132 provider_name = getstr8(&p, p_end);
2135 name = getstr8(&p, p_end);
2137 AVProgram *program = av_new_program(ts->stream, sid);
2139 av_dict_set(&program->metadata, "service_name", name, 0);
2140 av_dict_set(&program->metadata, "service_provider",
2145 av_free(provider_name);
2156 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2157 const uint8_t *packet);
2159 /* handle one TS packet */
2160 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2163 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2164 has_adaptation, has_payload;
2165 const uint8_t *p, *p_end;
2168 pid = AV_RB16(packet + 1) & 0x1fff;
2169 if (pid && discard_pid(ts, pid))
2171 is_start = packet[1] & 0x40;
2172 tss = ts->pids[pid];
2173 if (ts->auto_guess && !tss && is_start) {
2174 add_pes_stream(ts, pid, -1);
2175 tss = ts->pids[pid];
2179 ts->current_pid = pid;
2181 afc = (packet[3] >> 4) & 3;
2182 if (afc == 0) /* reserved value */
2184 has_adaptation = afc & 2;
2185 has_payload = afc & 1;
2186 is_discontinuity = has_adaptation &&
2187 packet[4] != 0 && /* with length > 0 */
2188 (packet[5] & 0x80); /* and discontinuity indicated */
2190 /* continuity check (currently not used) */
2191 cc = (packet[3] & 0xf);
2192 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2193 cc_ok = pid == 0x1FFF || // null packet PID
2200 av_log(ts->stream, AV_LOG_DEBUG,
2201 "Continuity check failed for pid %d expected %d got %d\n",
2202 pid, expected_cc, cc);
2203 if (tss->type == MPEGTS_PES) {
2204 PESContext *pc = tss->u.pes_filter.opaque;
2205 pc->flags |= AV_PKT_FLAG_CORRUPT;
2210 if (has_adaptation) {
2213 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2214 tss->last_pcr = pcr_h * 300 + pcr_l;
2215 /* skip adaptation field */
2218 /* if past the end of packet, ignore */
2219 p_end = packet + TS_PACKET_SIZE;
2220 if (p >= p_end || !has_payload)
2223 pos = avio_tell(ts->stream->pb);
2225 av_assert0(pos >= TS_PACKET_SIZE);
2226 ts->pos47_full = pos - TS_PACKET_SIZE;
2229 if (tss->type == MPEGTS_SECTION) {
2231 /* pointer field present */
2233 if (len > p_end - p)
2236 /* write remaining section bytes */
2237 write_section_data(ts, tss,
2239 /* check whether filter has been closed */
2245 write_section_data(ts, tss,
2250 write_section_data(ts, tss,
2255 // stop find_stream_info from waiting for more streams
2256 // when all programs have received a PMT
2257 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2259 for (i = 0; i < ts->nb_prg; i++) {
2260 if (!ts->prg[i].pmt_found)
2263 if (i == ts->nb_prg && ts->nb_prg > 0) {
2265 for (i = 0; i < ts->stream->nb_streams; i++) {
2266 AVStream *st = ts->stream->streams[i];
2267 types |= 1<<st->codec->codec_type;
2269 if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2270 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2271 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2278 // Note: The position here points actually behind the current packet.
2279 if (tss->type == MPEGTS_PES) {
2280 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2281 pos - ts->raw_packet_size)) < 0)
2289 static void reanalyze(MpegTSContext *ts) {
2290 AVIOContext *pb = ts->stream->pb;
2291 int64_t pos = avio_tell(pb);
2294 pos -= ts->pos47_full;
2295 if (pos == TS_PACKET_SIZE) {
2296 ts->size_stat[0] ++;
2297 } else if (pos == TS_DVHS_PACKET_SIZE) {
2298 ts->size_stat[1] ++;
2299 } else if (pos == TS_FEC_PACKET_SIZE) {
2300 ts->size_stat[2] ++;
2303 ts->size_stat_count ++;
2304 if (ts->size_stat_count > SIZE_STAT_THRESHOLD) {
2306 if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2307 newsize = TS_PACKET_SIZE;
2308 } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2309 newsize = TS_DVHS_PACKET_SIZE;
2310 } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2311 newsize = TS_FEC_PACKET_SIZE;
2313 if (newsize && newsize != ts->raw_packet_size) {
2314 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2315 ts->raw_packet_size = newsize;
2317 ts->size_stat_count = 0;
2318 memset(ts->size_stat, 0, sizeof(ts->size_stat));
2322 /* XXX: try to find a better synchro over several packets (use
2323 * get_packet_size() ?) */
2324 static int mpegts_resync(AVFormatContext *s)
2326 MpegTSContext *ts = s->priv_data;
2327 AVIOContext *pb = s->pb;
2330 for (i = 0; i < ts->resync_size; i++) {
2335 avio_seek(pb, -1, SEEK_CUR);
2336 reanalyze(s->priv_data);
2340 av_log(s, AV_LOG_ERROR,
2341 "max resync size reached, could not find sync byte\n");
2343 return AVERROR_INVALIDDATA;
2346 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2347 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2348 const uint8_t **data)
2350 AVIOContext *pb = s->pb;
2354 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2355 if (len != TS_PACKET_SIZE)
2356 return len < 0 ? len : AVERROR_EOF;
2357 /* check packet sync byte */
2358 if ((*data)[0] != 0x47) {
2359 /* find a new packet start */
2360 uint64_t pos = avio_tell(pb);
2361 avio_seek(pb, -FFMIN(raw_packet_size, pos), SEEK_CUR);
2363 if (mpegts_resync(s) < 0)
2364 return AVERROR(EAGAIN);
2374 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2376 AVIOContext *pb = s->pb;
2377 int skip = raw_packet_size - TS_PACKET_SIZE;
2379 avio_skip(pb, skip);
2382 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2384 AVFormatContext *s = ts->stream;
2385 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2386 const uint8_t *data;
2390 if (avio_tell(s->pb) != ts->last_pos) {
2392 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2393 /* seek detected, flush pes buffer */
2394 for (i = 0; i < NB_PID_MAX; i++) {
2396 if (ts->pids[i]->type == MPEGTS_PES) {
2397 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2398 av_buffer_unref(&pes->buffer);
2399 pes->data_index = 0;
2400 pes->state = MPEGTS_SKIP; /* skip until pes header */
2401 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
2402 ts->pids[i]->u.section_filter.last_ver = -1;
2404 ts->pids[i]->last_cc = -1;
2405 ts->pids[i]->last_pcr = -1;
2412 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2415 if (nb_packets != 0 && packet_num >= nb_packets ||
2416 ts->stop_parse > 1) {
2417 ret = AVERROR(EAGAIN);
2420 if (ts->stop_parse > 0)
2423 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2426 ret = handle_packet(ts, data);
2427 finished_reading_packet(s, ts->raw_packet_size);
2431 ts->last_pos = avio_tell(s->pb);
2435 static int mpegts_probe(AVProbeData *p)
2437 const int size = p->buf_size;
2441 int check_count = size / TS_FEC_PACKET_SIZE;
2442 #define CHECK_COUNT 10
2443 #define CHECK_BLOCK 100
2445 if (check_count < CHECK_COUNT)
2448 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2449 int left = FFMIN(check_count - i, CHECK_BLOCK);
2450 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , NULL, 1);
2451 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, NULL, 1);
2452 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , NULL, 1);
2453 score = FFMAX3(score, dvhs_score, fec_score);
2455 maxscore = FFMAX(maxscore, score);
2458 sumscore = sumscore * CHECK_COUNT / check_count;
2459 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2461 av_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2463 if (sumscore > 6) return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2464 else if (maxscore > 6) return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2469 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2470 * (-1) if not available */
2471 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2473 int afc, len, flags;
2477 afc = (packet[3] >> 4) & 3;
2479 return AVERROR_INVALIDDATA;
2484 return AVERROR_INVALIDDATA;
2487 if (!(flags & 0x10))
2488 return AVERROR_INVALIDDATA;
2490 return AVERROR_INVALIDDATA;
2492 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2493 *ppcr_low = ((p[4] & 1) << 8) | p[5];
2497 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2499 /* NOTE: We attempt to seek on non-seekable files as well, as the
2500 * probe buffer usually is big enough. Only warn if the seek failed
2501 * on files where the seek should work. */
2502 if (avio_seek(pb, pos, SEEK_SET) < 0)
2503 av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2506 static int mpegts_read_header(AVFormatContext *s)
2508 MpegTSContext *ts = s->priv_data;
2509 AVIOContext *pb = s->pb;
2510 uint8_t buf[8 * 1024] = {0};
2512 int64_t pos, probesize = s->probesize ? s->probesize : s->probesize2;
2514 if (ffio_ensure_seekback(pb, probesize) < 0)
2515 av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2517 /* read the first 8192 bytes to get packet size */
2518 pos = avio_tell(pb);
2519 len = avio_read(pb, buf, sizeof(buf));
2520 ts->raw_packet_size = get_packet_size(buf, len);
2521 if (ts->raw_packet_size <= 0) {
2522 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2523 ts->raw_packet_size = TS_PACKET_SIZE;
2528 if (s->iformat == &ff_mpegts_demuxer) {
2531 /* first do a scan to get all the services */
2532 seek_back(s, pb, pos);
2534 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2536 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2538 handle_packets(ts, probesize / ts->raw_packet_size);
2539 /* if could not find service, enable auto_guess */
2543 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2545 s->ctx_flags |= AVFMTCTX_NOHEADER;
2548 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2549 int64_t pcrs[2], pcr_h;
2550 int packet_count[2];
2551 uint8_t packet[TS_PACKET_SIZE];
2552 const uint8_t *data;
2554 /* only read packets */
2556 st = avformat_new_stream(s, NULL);
2558 return AVERROR(ENOMEM);
2559 avpriv_set_pts_info(st, 60, 1, 27000000);
2560 st->codec->codec_type = AVMEDIA_TYPE_DATA;
2561 st->codec->codec_id = AV_CODEC_ID_MPEG2TS;
2563 /* we iterate until we find two PCRs to estimate the bitrate */
2568 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2571 pid = AV_RB16(data + 1) & 0x1fff;
2572 if ((pcr_pid == -1 || pcr_pid == pid) &&
2573 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2574 finished_reading_packet(s, ts->raw_packet_size);
2576 packet_count[nb_pcrs] = nb_packets;
2577 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2582 finished_reading_packet(s, ts->raw_packet_size);
2587 /* NOTE1: the bitrate is computed without the FEC */
2588 /* NOTE2: it is only the bitrate of the start of the stream */
2589 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2590 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2591 s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
2592 st->codec->bit_rate = s->bit_rate;
2593 st->start_time = ts->cur_pcr;
2594 av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
2595 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2598 seek_back(s, pb, pos);
2602 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2604 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
2606 MpegTSContext *ts = s->priv_data;
2608 int64_t pcr_h, next_pcr_h, pos;
2609 int pcr_l, next_pcr_l;
2610 uint8_t pcr_buf[12];
2611 const uint8_t *data;
2613 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2614 return AVERROR(ENOMEM);
2615 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2616 pkt->pos = avio_tell(s->pb);
2618 av_free_packet(pkt);
2621 if (data != pkt->data)
2622 memcpy(pkt->data, data, ts->raw_packet_size);
2623 finished_reading_packet(s, ts->raw_packet_size);
2624 if (ts->mpeg2ts_compute_pcr) {
2625 /* compute exact PCR for each packet */
2626 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2627 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2628 pos = avio_tell(s->pb);
2629 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
2630 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2631 avio_read(s->pb, pcr_buf, 12);
2632 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2633 /* XXX: not precise enough */
2635 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2640 avio_seek(s->pb, pos, SEEK_SET);
2641 /* no next PCR found: we use previous increment */
2642 ts->cur_pcr = pcr_h * 300 + pcr_l;
2644 pkt->pts = ts->cur_pcr;
2645 pkt->duration = ts->pcr_incr;
2646 ts->cur_pcr += ts->pcr_incr;
2648 pkt->stream_index = 0;
2652 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
2654 MpegTSContext *ts = s->priv_data;
2659 ret = handle_packets(ts, 0);
2661 av_free_packet(ts->pkt);
2662 /* flush pes data left */
2663 for (i = 0; i < NB_PID_MAX; i++)
2664 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2665 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2666 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2667 new_pes_packet(pes, pkt);
2668 pes->state = MPEGTS_SKIP;
2675 if (!ret && pkt->size < 0)
2676 ret = AVERROR(EINTR);
2680 static void mpegts_free(MpegTSContext *ts)
2686 for (i = 0; i < NB_PID_MAX; i++)
2688 mpegts_close_filter(ts, ts->pids[i]);
2691 static int mpegts_read_close(AVFormatContext *s)
2693 MpegTSContext *ts = s->priv_data;
2698 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2699 int64_t *ppos, int64_t pos_limit)
2701 MpegTSContext *ts = s->priv_data;
2702 int64_t pos, timestamp;
2703 uint8_t buf[TS_PACKET_SIZE];
2704 int pcr_l, pcr_pid =
2705 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
2706 int pos47 = ts->pos47_full % ts->raw_packet_size;
2708 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
2709 ts->raw_packet_size + pos47;
2710 while(pos < pos_limit) {
2711 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2712 return AV_NOPTS_VALUE;
2713 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2714 return AV_NOPTS_VALUE;
2715 if (buf[0] != 0x47) {
2716 avio_seek(s->pb, -TS_PACKET_SIZE, SEEK_CUR);
2717 if (mpegts_resync(s) < 0)
2718 return AV_NOPTS_VALUE;
2719 pos = avio_tell(s->pb);
2722 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2723 parse_pcr(×tamp, &pcr_l, buf) == 0) {
2727 pos += ts->raw_packet_size;
2730 return AV_NOPTS_VALUE;
2733 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2734 int64_t *ppos, int64_t pos_limit)
2736 MpegTSContext *ts = s->priv_data;
2738 int pos47 = ts->pos47_full % ts->raw_packet_size;
2739 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
2740 ff_read_frame_flush(s);
2741 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2742 return AV_NOPTS_VALUE;
2743 while(pos < pos_limit) {
2746 av_init_packet(&pkt);
2747 ret = av_read_frame(s, &pkt);
2749 return AV_NOPTS_VALUE;
2750 av_free_packet(&pkt);
2751 if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
2752 ff_reduce_index(s, pkt.stream_index);
2753 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
2754 if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
2762 return AV_NOPTS_VALUE;
2765 /**************************************************************/
2766 /* parsing functions - called from other demuxers such as RTP */
2768 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
2772 ts = av_mallocz(sizeof(MpegTSContext));
2775 /* no stream case, currently used by RTP */
2776 ts->raw_packet_size = TS_PACKET_SIZE;
2779 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2780 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2785 /* return the consumed length if a packet was output, or -1 if no
2786 * packet is output */
2787 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
2788 const uint8_t *buf, int len)
2796 if (len < TS_PACKET_SIZE)
2797 return AVERROR_INVALIDDATA;
2798 if (buf[0] != 0x47) {
2802 handle_packet(ts, buf);
2803 buf += TS_PACKET_SIZE;
2804 len -= TS_PACKET_SIZE;
2805 if (ts->stop_parse == 1)
2812 void avpriv_mpegts_parse_close(MpegTSContext *ts)
2818 AVInputFormat ff_mpegts_demuxer = {
2820 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2821 .priv_data_size = sizeof(MpegTSContext),
2822 .read_probe = mpegts_probe,
2823 .read_header = mpegts_read_header,
2824 .read_packet = mpegts_read_packet,
2825 .read_close = mpegts_read_close,
2826 .read_timestamp = mpegts_get_dts,
2827 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2828 .priv_class = &mpegts_class,
2831 AVInputFormat ff_mpegtsraw_demuxer = {
2832 .name = "mpegtsraw",
2833 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
2834 .priv_data_size = sizeof(MpegTSContext),
2835 .read_header = mpegts_read_header,
2836 .read_packet = mpegts_raw_read_packet,
2837 .read_close = mpegts_read_close,
2838 .read_timestamp = mpegts_get_dts,
2839 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2840 .priv_class = &mpegtsraw_class,