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"
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 {
80 unsigned int check_crc : 1;
81 unsigned int end_of_section_reached : 1;
82 SectionCallback *section_cb;
84 } MpegTSSectionFilter;
89 int last_cc; /* last cc code (-1 if first packet) */
91 enum MpegTSFilterType type;
93 MpegTSPESFilter pes_filter;
94 MpegTSSectionFilter section_filter;
98 #define MAX_PIDS_PER_PROGRAM 64
100 unsigned int id; // program id/service id
101 unsigned int nb_pids;
102 unsigned int pids[MAX_PIDS_PER_PROGRAM];
104 /** have we found pmt for this program */
108 struct MpegTSContext {
109 const AVClass *class;
111 AVFormatContext *stream;
112 /** raw packet size, including FEC if present */
117 #define SIZE_STAT_THRESHOLD 10
121 /** if true, all pids are analyzed to find streams */
124 /** compute exact PCR for each transport stream packet */
125 int mpeg2ts_compute_pcr;
127 /** fix dvb teletext pts */
128 int fix_teletext_pts;
130 int64_t cur_pcr; /**< used to estimate the exact PCR */
131 int pcr_incr; /**< used to estimate the exact PCR */
133 /* data needed to handle file based ts */
134 /** stop parsing loop */
136 /** packet containing Audio/Video data */
138 /** to detect seek */
146 /******************************************/
147 /* private mpegts data */
149 /** structure to keep track of Program->pids mapping */
153 int8_t crc_validity[NB_PID_MAX];
154 /** filters for various streams specified by PMT + for the PAT and PMT */
155 MpegTSFilter *pids[NB_PID_MAX];
159 #define MPEGTS_OPTIONS \
160 { "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 }
162 static const AVOption options[] = {
164 {"fix_teletext_pts", "Try to fix pts values of dvb teletext streams.", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_INT,
165 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
166 {"ts_packetsize", "Output option carrying the raw packet size.", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
167 {.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
168 {"skip_changes", "Skip changing / adding streams / programs.", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_INT,
169 {.i64 = 0}, 0, 1, 0 },
170 {"skip_clear", "Skip clearing programs.", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_INT,
171 {.i64 = 0}, 0, 1, 0 },
175 static const AVClass mpegts_class = {
176 .class_name = "mpegts demuxer",
177 .item_name = av_default_item_name,
179 .version = LIBAVUTIL_VERSION_INT,
182 static const AVOption raw_options[] = {
184 { "compute_pcr", "Compute exact PCR for each transport stream packet.",
185 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT,
186 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
187 { "ts_packetsize", "Output option carrying the raw packet size.",
188 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
190 AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
194 static const AVClass mpegtsraw_class = {
195 .class_name = "mpegtsraw demuxer",
196 .item_name = av_default_item_name,
197 .option = raw_options,
198 .version = LIBAVUTIL_VERSION_INT,
201 /* TS stream handling */
206 MPEGTS_PESHEADER_FILL,
211 /* enough for PES header + length */
212 #define PES_START_SIZE 6
213 #define PES_HEADER_SIZE 9
214 #define MAX_PES_HEADER_SIZE (9 + 255)
216 typedef struct PESContext {
218 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
221 AVFormatContext *stream;
223 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
224 enum MpegTSState state;
225 /* used to get the format */
227 int flags; /**< copied to the AVPacket flags */
230 int extended_stream_id;
232 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
233 uint8_t header[MAX_PES_HEADER_SIZE];
238 extern AVInputFormat ff_mpegts_demuxer;
240 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
243 for (i = 0; i < ts->nb_prg; i++) {
244 if (ts->prg[i].id == programid) {
251 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
253 AVProgram *prg = NULL;
256 for (i = 0; i < ts->stream->nb_programs; i++)
257 if (ts->stream->programs[i]->id == programid) {
258 prg = ts->stream->programs[i];
263 prg->nb_stream_indexes = 0;
266 static void clear_program(MpegTSContext *ts, unsigned int programid)
270 clear_avprogram(ts, programid);
271 for (i = 0; i < ts->nb_prg; i++)
272 if (ts->prg[i].id == programid) {
273 ts->prg[i].nb_pids = 0;
274 ts->prg[i].pmt_found = 0;
278 static void clear_programs(MpegTSContext *ts)
284 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
287 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
291 p = &ts->prg[ts->nb_prg];
298 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
301 struct Program *p = get_program(ts, programid);
305 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
307 p->pids[p->nb_pids++] = pid;
310 static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
312 struct Program *p = get_program(ts, programid);
319 static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
322 for (i = 0; i < s->nb_programs; i++) {
323 if (s->programs[i]->id == programid) {
324 s->programs[i]->pcr_pid = pid;
331 * @brief discard_pid() decides if the pid is to be discarded according
332 * to caller's programs selection
333 * @param ts : - TS context
335 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
338 static int discard_pid(MpegTSContext *ts, unsigned int pid)
341 int used = 0, discarded = 0;
344 /* If none of the programs have .discard=AVDISCARD_ALL then there's
345 * no way we have to discard this packet */
346 for (k = 0; k < ts->stream->nb_programs; k++)
347 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
349 if (k == ts->stream->nb_programs)
352 for (i = 0; i < ts->nb_prg; i++) {
354 for (j = 0; j < p->nb_pids; j++) {
355 if (p->pids[j] != pid)
357 // is program with id p->id set to be discarded?
358 for (k = 0; k < ts->stream->nb_programs; k++) {
359 if (ts->stream->programs[k]->id == p->id) {
360 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
369 return !used && discarded;
373 * Assemble PES packets out of TS packets, and then call the "section_cb"
374 * function when they are complete.
376 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
377 const uint8_t *buf, int buf_size, int is_start)
379 MpegTSSectionFilter *tss = &tss1->u.section_filter;
383 memcpy(tss->section_buf, buf, buf_size);
384 tss->section_index = buf_size;
385 tss->section_h_size = -1;
386 tss->end_of_section_reached = 0;
388 if (tss->end_of_section_reached)
390 len = 4096 - tss->section_index;
393 memcpy(tss->section_buf + tss->section_index, buf, len);
394 tss->section_index += len;
397 /* compute section length if possible */
398 if (tss->section_h_size == -1 && tss->section_index >= 3) {
399 len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
402 tss->section_h_size = len;
405 if (tss->section_h_size != -1 &&
406 tss->section_index >= tss->section_h_size) {
408 tss->end_of_section_reached = 1;
410 if (tss->check_crc) {
411 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, tss->section_buf, tss->section_h_size);
413 ts->crc_validity[ tss1->pid ] = 100;
414 }else if (ts->crc_validity[ tss1->pid ] > -10) {
415 ts->crc_validity[ tss1->pid ]--;
420 tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
424 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
425 enum MpegTSFilterType type)
427 MpegTSFilter *filter;
429 av_dlog(ts->stream, "Filter: pid=0x%x\n", pid);
431 if (pid >= NB_PID_MAX || ts->pids[pid])
433 filter = av_mallocz(sizeof(MpegTSFilter));
436 ts->pids[pid] = filter;
441 filter->last_cc = -1;
442 filter->last_pcr= -1;
447 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
449 SectionCallback *section_cb,
453 MpegTSFilter *filter;
454 MpegTSSectionFilter *sec;
456 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
458 sec = &filter->u.section_filter;
459 sec->section_cb = section_cb;
460 sec->opaque = opaque;
461 sec->section_buf = av_malloc(MAX_SECTION_SIZE);
462 sec->check_crc = check_crc;
463 if (!sec->section_buf) {
470 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
474 MpegTSFilter *filter;
475 MpegTSPESFilter *pes;
477 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
480 pes = &filter->u.pes_filter;
481 pes->pes_cb = pes_cb;
482 pes->opaque = opaque;
486 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
488 return mpegts_open_filter(ts, pid, MPEGTS_PCR);
491 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
496 if (filter->type == MPEGTS_SECTION)
497 av_freep(&filter->u.section_filter.section_buf);
498 else if (filter->type == MPEGTS_PES) {
499 PESContext *pes = filter->u.pes_filter.opaque;
500 av_buffer_unref(&pes->buffer);
501 /* referenced private data will be freed later in
502 * avformat_close_input */
503 if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
504 av_freep(&filter->u.pes_filter.opaque);
509 ts->pids[pid] = NULL;
512 static int analyze(const uint8_t *buf, int size, int packet_size, int *index)
514 int stat[TS_MAX_PACKET_SIZE];
519 memset(stat, 0, packet_size * sizeof(*stat));
521 for (i = 0; i < size - 3; i++) {
522 if (buf[i] == 0x47 && !(buf[i + 1] & 0x80) && buf[i + 3] != 0x47) {
523 int x = i % packet_size;
526 if (stat[x] > best_score) {
527 best_score = stat[x];
534 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
537 /* autodetect fec presence. Must have at least 1024 bytes */
538 static int get_packet_size(const uint8_t *buf, int size)
540 int score, fec_score, dvhs_score;
542 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
543 return AVERROR_INVALIDDATA;
545 score = analyze(buf, size, TS_PACKET_SIZE, NULL);
546 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL);
547 fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, NULL);
548 av_dlog(NULL, "score: %d, dvhs_score: %d, fec_score: %d \n",
549 score, dvhs_score, fec_score);
551 if (score > fec_score && score > dvhs_score)
552 return TS_PACKET_SIZE;
553 else if (dvhs_score > score && dvhs_score > fec_score)
554 return TS_DVHS_PACKET_SIZE;
555 else if (score < fec_score && dvhs_score < fec_score)
556 return TS_FEC_PACKET_SIZE;
558 return AVERROR_INVALIDDATA;
561 typedef struct SectionHeader {
566 uint8_t last_sec_num;
569 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
576 return AVERROR_INVALIDDATA;
582 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
588 if ((p + 1) >= p_end)
589 return AVERROR_INVALIDDATA;
596 /* read and allocate a DVB string preceded by its length */
597 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
604 len = get8(&p, p_end);
607 if ((p + len) > p_end)
609 str = av_malloc(len + 1);
619 static int parse_section_header(SectionHeader *h,
620 const uint8_t **pp, const uint8_t *p_end)
624 val = get8(pp, p_end);
629 val = get16(pp, p_end);
633 val = get8(pp, p_end);
636 h->version = (val >> 1) & 0x1f;
637 val = get8(pp, p_end);
641 val = get8(pp, p_end);
644 h->last_sec_num = val;
649 uint32_t stream_type;
650 enum AVMediaType codec_type;
651 enum AVCodecID codec_id;
654 static const StreamType ISO_types[] = {
655 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
656 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
657 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
658 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
659 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
660 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
661 /* Makito encoder sets stream type 0x11 for AAC,
662 * so auto-detect LOAS/LATM instead of hardcoding it. */
663 #if !CONFIG_LOAS_DEMUXER
664 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
666 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
667 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
668 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
669 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
670 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
674 static const StreamType HDMV_types[] = {
675 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
676 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
677 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
678 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
679 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
680 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
681 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
682 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
683 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
684 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
689 static const StreamType MISC_types[] = {
690 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
691 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
695 static const StreamType REGD_types[] = {
696 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
697 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
698 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
699 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
700 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
701 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
702 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
703 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
704 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
705 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
709 static const StreamType METADATA_types[] = {
710 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
711 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
715 /* descriptor present */
716 static const StreamType DESC_types[] = {
717 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
718 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
719 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
720 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
721 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
725 static void mpegts_find_stream_type(AVStream *st,
726 uint32_t stream_type,
727 const StreamType *types)
729 if (avcodec_is_open(st->codec)) {
730 av_log(NULL, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
734 for (; types->stream_type; types++)
735 if (stream_type == types->stream_type) {
736 st->codec->codec_type = types->codec_type;
737 st->codec->codec_id = types->codec_id;
738 st->request_probe = 0;
743 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
744 uint32_t stream_type, uint32_t prog_reg_desc)
746 int old_codec_type = st->codec->codec_type;
747 int old_codec_id = st->codec->codec_id;
749 if (avcodec_is_open(st->codec)) {
750 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
754 avpriv_set_pts_info(st, 33, 1, 90000);
756 st->codec->codec_type = AVMEDIA_TYPE_DATA;
757 st->codec->codec_id = AV_CODEC_ID_NONE;
758 st->need_parsing = AVSTREAM_PARSE_FULL;
760 pes->stream_type = stream_type;
762 av_log(pes->stream, AV_LOG_DEBUG,
763 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
764 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
766 st->codec->codec_tag = pes->stream_type;
768 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
769 if ((prog_reg_desc == AV_RL32("HDMV") ||
770 prog_reg_desc == AV_RL32("HDPR")) &&
771 st->codec->codec_id == AV_CODEC_ID_NONE) {
772 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
773 if (pes->stream_type == 0x83) {
774 // HDMV TrueHD streams also contain an AC3 coded version of the
775 // audio track - add a second stream for this
777 // priv_data cannot be shared between streams
778 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
780 return AVERROR(ENOMEM);
781 memcpy(sub_pes, pes, sizeof(*sub_pes));
783 sub_st = avformat_new_stream(pes->stream, NULL);
786 return AVERROR(ENOMEM);
789 sub_st->id = pes->pid;
790 avpriv_set_pts_info(sub_st, 33, 1, 90000);
791 sub_st->priv_data = sub_pes;
792 sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
793 sub_st->codec->codec_id = AV_CODEC_ID_AC3;
794 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
795 sub_pes->sub_st = pes->sub_st = sub_st;
798 if (st->codec->codec_id == AV_CODEC_ID_NONE)
799 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
800 if (st->codec->codec_id == AV_CODEC_ID_NONE) {
801 st->codec->codec_id = old_codec_id;
802 st->codec->codec_type = old_codec_type;
808 static void reset_pes_packet_state(PESContext *pes)
810 pes->pts = AV_NOPTS_VALUE;
811 pes->dts = AV_NOPTS_VALUE;
814 av_buffer_unref(&pes->buffer);
817 static void new_pes_packet(PESContext *pes, AVPacket *pkt)
821 pkt->buf = pes->buffer;
822 pkt->data = pes->buffer->data;
823 pkt->size = pes->data_index;
825 if (pes->total_size != MAX_PES_PAYLOAD &&
826 pes->pes_header_size + pes->data_index != pes->total_size +
828 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
829 pes->flags |= AV_PKT_FLAG_CORRUPT;
831 memset(pkt->data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
833 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
834 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
835 pkt->stream_index = pes->sub_st->index;
837 pkt->stream_index = pes->st->index;
840 /* store position of first TS packet of this PES packet */
841 pkt->pos = pes->ts_packet_pos;
842 pkt->flags = pes->flags;
845 reset_pes_packet_state(pes);
848 static uint64_t get_ts64(GetBitContext *gb, int bits)
850 if (get_bits_left(gb) < bits)
851 return AV_NOPTS_VALUE;
852 return get_bits64(gb, bits);
855 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
856 const uint8_t *buf, int buf_size)
859 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
860 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
861 int dts_flag = -1, cts_flag = -1;
862 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
863 uint8_t buf_padded[128 + FF_INPUT_BUFFER_PADDING_SIZE];
864 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - FF_INPUT_BUFFER_PADDING_SIZE);
866 memcpy(buf_padded, buf, buf_padded_size);
868 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
870 if (sl->use_au_start)
871 au_start_flag = get_bits1(&gb);
873 au_end_flag = get_bits1(&gb);
874 if (!sl->use_au_start && !sl->use_au_end)
875 au_start_flag = au_end_flag = 1;
877 ocr_flag = get_bits1(&gb);
879 idle_flag = get_bits1(&gb);
881 padding_flag = get_bits1(&gb);
883 padding_bits = get_bits(&gb, 3);
885 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
886 if (sl->packet_seq_num_len)
887 skip_bits_long(&gb, sl->packet_seq_num_len);
888 if (sl->degr_prior_len)
890 skip_bits(&gb, sl->degr_prior_len);
892 skip_bits_long(&gb, sl->ocr_len);
894 if (sl->use_rand_acc_pt)
896 if (sl->au_seq_num_len > 0)
897 skip_bits_long(&gb, sl->au_seq_num_len);
898 if (sl->use_timestamps) {
899 dts_flag = get_bits1(&gb);
900 cts_flag = get_bits1(&gb);
903 if (sl->inst_bitrate_len)
904 inst_bitrate_flag = get_bits1(&gb);
906 dts = get_ts64(&gb, sl->timestamp_len);
908 cts = get_ts64(&gb, sl->timestamp_len);
910 skip_bits_long(&gb, sl->au_len);
911 if (inst_bitrate_flag)
912 skip_bits_long(&gb, sl->inst_bitrate_len);
915 if (dts != AV_NOPTS_VALUE)
917 if (cts != AV_NOPTS_VALUE)
920 if (sl->timestamp_len && sl->timestamp_res)
921 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
923 return (get_bits_count(&gb) + 7) >> 3;
926 /* return non zero if a packet could be constructed */
927 static int mpegts_push_data(MpegTSFilter *filter,
928 const uint8_t *buf, int buf_size, int is_start,
931 PESContext *pes = filter->u.pes_filter.opaque;
932 MpegTSContext *ts = pes->ts;
940 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
941 new_pes_packet(pes, ts->pkt);
944 reset_pes_packet_state(pes);
946 pes->state = MPEGTS_HEADER;
947 pes->ts_packet_pos = pos;
950 while (buf_size > 0) {
951 switch (pes->state) {
953 len = PES_START_SIZE - pes->data_index;
956 memcpy(pes->header + pes->data_index, p, len);
957 pes->data_index += len;
960 if (pes->data_index == PES_START_SIZE) {
961 /* we got all the PES or section header. We can now
963 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
964 pes->header[2] == 0x01) {
965 /* it must be an mpeg2 PES stream */
966 code = pes->header[3] | 0x100;
967 av_dlog(pes->stream, "pid=%x pes_code=%#x\n", pes->pid,
970 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
972 pes->sub_st->discard == AVDISCARD_ALL)) ||
973 code == 0x1be) /* padding_stream */
976 /* stream not present in PMT */
978 if (ts->skip_changes)
981 pes->st = avformat_new_stream(ts->stream, NULL);
983 return AVERROR(ENOMEM);
984 pes->st->id = pes->pid;
985 mpegts_set_stream_info(pes->st, pes, 0, 0);
988 pes->total_size = AV_RB16(pes->header + 4);
989 /* NOTE: a zero total size means the PES size is
991 if (!pes->total_size)
992 pes->total_size = MAX_PES_PAYLOAD;
994 /* allocate pes buffer */
995 pes->buffer = av_buffer_alloc(pes->total_size +
996 FF_INPUT_BUFFER_PADDING_SIZE);
998 return AVERROR(ENOMEM);
1000 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1001 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1002 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1003 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1004 pes->state = MPEGTS_PESHEADER;
1005 if (pes->st->codec->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1006 av_dlog(pes->stream,
1007 "pid=%x stream_type=%x probing\n",
1010 pes->st->request_probe = 1;
1013 pes->state = MPEGTS_PAYLOAD;
1014 pes->data_index = 0;
1017 /* otherwise, it should be a table */
1020 pes->state = MPEGTS_SKIP;
1025 /**********************************************/
1026 /* PES packing parsing */
1027 case MPEGTS_PESHEADER:
1028 len = PES_HEADER_SIZE - pes->data_index;
1030 return AVERROR_INVALIDDATA;
1033 memcpy(pes->header + pes->data_index, p, len);
1034 pes->data_index += len;
1037 if (pes->data_index == PES_HEADER_SIZE) {
1038 pes->pes_header_size = pes->header[8] + 9;
1039 pes->state = MPEGTS_PESHEADER_FILL;
1042 case MPEGTS_PESHEADER_FILL:
1043 len = pes->pes_header_size - pes->data_index;
1045 return AVERROR_INVALIDDATA;
1048 memcpy(pes->header + pes->data_index, p, len);
1049 pes->data_index += len;
1052 if (pes->data_index == pes->pes_header_size) {
1054 unsigned int flags, pes_ext, skip;
1056 flags = pes->header[7];
1057 r = pes->header + 9;
1058 pes->pts = AV_NOPTS_VALUE;
1059 pes->dts = AV_NOPTS_VALUE;
1060 if ((flags & 0xc0) == 0x80) {
1061 pes->dts = pes->pts = ff_parse_pes_pts(r);
1063 } else if ((flags & 0xc0) == 0xc0) {
1064 pes->pts = ff_parse_pes_pts(r);
1066 pes->dts = ff_parse_pes_pts(r);
1069 pes->extended_stream_id = -1;
1070 if (flags & 0x01) { /* PES extension */
1072 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1073 skip = (pes_ext >> 4) & 0xb;
1076 if ((pes_ext & 0x41) == 0x01 &&
1077 (r + 2) <= (pes->header + pes->pes_header_size)) {
1078 /* PES extension 2 */
1079 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1080 pes->extended_stream_id = r[1];
1084 /* we got the full header. We parse it and get the payload */
1085 pes->state = MPEGTS_PAYLOAD;
1086 pes->data_index = 0;
1087 if (pes->stream_type == 0x12 && buf_size > 0) {
1088 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1090 pes->pes_header_size += sl_header_bytes;
1091 p += sl_header_bytes;
1092 buf_size -= sl_header_bytes;
1094 if (pes->stream_type == 0x15 && buf_size >= 5) {
1095 /* skip metadata access unit header */
1096 pes->pes_header_size += 5;
1100 if (pes->ts->fix_teletext_pts && pes->st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1101 AVProgram *p = NULL;
1102 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1103 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1104 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1106 AVStream *st = NULL;
1107 if (f->type == MPEGTS_PES) {
1108 PESContext *pcrpes = f->u.pes_filter.opaque;
1111 } else if (f->type == MPEGTS_PCR) {
1113 for (i = 0; i < p->nb_stream_indexes; i++) {
1114 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1115 if (pst->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1119 if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1120 // teletext packets do not always have correct timestamps,
1121 // the standard says they should be handled after 40.6 ms at most,
1122 // and the pcr error to this packet should be no more than 100 ms.
1123 // TODO: we should interpolate the PCR, not just use the last one
1124 int64_t pcr = f->last_pcr / 300;
1125 pes->st->pts_wrap_reference = st->pts_wrap_reference;
1126 pes->st->pts_wrap_behavior = st->pts_wrap_behavior;
1127 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1128 pes->pts = pes->dts = pcr;
1129 } else if (pes->dts > pcr + 3654 + 9000) {
1130 pes->pts = pes->dts = pcr + 3654 + 9000;
1140 case MPEGTS_PAYLOAD:
1142 if (pes->data_index > 0 &&
1143 pes->data_index + buf_size > pes->total_size) {
1144 new_pes_packet(pes, ts->pkt);
1145 pes->total_size = MAX_PES_PAYLOAD;
1146 pes->buffer = av_buffer_alloc(pes->total_size +
1147 FF_INPUT_BUFFER_PADDING_SIZE);
1149 return AVERROR(ENOMEM);
1151 } else if (pes->data_index == 0 &&
1152 buf_size > pes->total_size) {
1153 // pes packet size is < ts size packet and pes data is padded with 0xff
1154 // not sure if this is legal in ts but see issue #2392
1155 buf_size = pes->total_size;
1157 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1158 pes->data_index += buf_size;
1159 /* emit complete packets with known packet size
1160 * decreases demuxer delay for infrequent packets like subtitles from
1161 * a couple of seconds to milliseconds for properly muxed files.
1162 * total_size is the number of bytes following pes_packet_length
1163 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1164 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1165 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1167 new_pes_packet(pes, ts->pkt);
1181 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1186 /* if no pid found, then add a pid context */
1187 pes = av_mallocz(sizeof(PESContext));
1191 pes->stream = ts->stream;
1193 pes->pcr_pid = pcr_pid;
1194 pes->state = MPEGTS_SKIP;
1195 pes->pts = AV_NOPTS_VALUE;
1196 pes->dts = AV_NOPTS_VALUE;
1197 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1210 Mp4Descr *active_descr;
1212 int max_descr_count;
1214 int predefined_SLConfigDescriptor_seen;
1215 } MP4DescrParseContext;
1217 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1218 const uint8_t *buf, unsigned size,
1219 Mp4Descr *descr, int max_descr_count)
1222 if (size > (1 << 30))
1223 return AVERROR_INVALIDDATA;
1225 if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1226 NULL, NULL, NULL, NULL)) < 0)
1233 d->active_descr = NULL;
1234 d->max_descr_count = max_descr_count;
1239 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1241 int64_t new_off = avio_tell(pb);
1242 (*len) -= new_off - *off;
1246 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1249 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1252 int ret = parse_mp4_descr(d, off, len, 0);
1255 update_offsets(&d->pb, &off, &len);
1260 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1262 avio_rb16(&d->pb); // ID
1268 update_offsets(&d->pb, &off, &len);
1269 return parse_mp4_descr_arr(d, off, len);
1272 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1277 id_flags = avio_rb16(&d->pb);
1278 if (!(id_flags & 0x0020)) { // URL_Flag
1279 update_offsets(&d->pb, &off, &len);
1280 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1286 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1289 if (d->descr_count >= d->max_descr_count)
1290 return AVERROR_INVALIDDATA;
1291 ff_mp4_parse_es_descr(&d->pb, &es_id);
1292 d->active_descr = d->descr + (d->descr_count++);
1294 d->active_descr->es_id = es_id;
1295 update_offsets(&d->pb, &off, &len);
1296 parse_mp4_descr(d, off, len, MP4DecConfigDescrTag);
1297 update_offsets(&d->pb, &off, &len);
1299 parse_mp4_descr(d, off, len, MP4SLDescrTag);
1300 d->active_descr = NULL;
1304 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1307 Mp4Descr *descr = d->active_descr;
1309 return AVERROR_INVALIDDATA;
1310 d->active_descr->dec_config_descr = av_malloc(len);
1311 if (!descr->dec_config_descr)
1312 return AVERROR(ENOMEM);
1313 descr->dec_config_descr_len = len;
1314 avio_read(&d->pb, descr->dec_config_descr, len);
1318 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1320 Mp4Descr *descr = d->active_descr;
1323 return AVERROR_INVALIDDATA;
1325 predefined = avio_r8(&d->pb);
1328 int flags = avio_r8(&d->pb);
1329 descr->sl.use_au_start = !!(flags & 0x80);
1330 descr->sl.use_au_end = !!(flags & 0x40);
1331 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1332 descr->sl.use_padding = !!(flags & 0x08);
1333 descr->sl.use_timestamps = !!(flags & 0x04);
1334 descr->sl.use_idle = !!(flags & 0x02);
1335 descr->sl.timestamp_res = avio_rb32(&d->pb);
1337 descr->sl.timestamp_len = avio_r8(&d->pb);
1338 if (descr->sl.timestamp_len > 64) {
1339 avpriv_request_sample(NULL, "timestamp_len > 64");
1340 descr->sl.timestamp_len = 64;
1341 return AVERROR_PATCHWELCOME;
1343 descr->sl.ocr_len = avio_r8(&d->pb);
1344 descr->sl.au_len = avio_r8(&d->pb);
1345 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1346 lengths = avio_rb16(&d->pb);
1347 descr->sl.degr_prior_len = lengths >> 12;
1348 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1349 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1350 } else if (!d->predefined_SLConfigDescriptor_seen){
1351 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1352 d->predefined_SLConfigDescriptor_seen = 1;
1357 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1361 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1362 update_offsets(&d->pb, &off, &len);
1363 if (len < 0 || len1 > len || len1 <= 0) {
1364 av_log(d->s, AV_LOG_ERROR,
1365 "Tag %x length violation new length %d bytes remaining %d\n",
1367 return AVERROR_INVALIDDATA;
1370 if (d->level++ >= MAX_LEVEL) {
1371 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1375 if (target_tag && tag != target_tag) {
1376 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1383 parse_MP4IODescrTag(d, off, len1);
1386 parse_MP4ODescrTag(d, off, len1);
1389 parse_MP4ESDescrTag(d, off, len1);
1391 case MP4DecConfigDescrTag:
1392 parse_MP4DecConfigDescrTag(d, off, len1);
1395 parse_MP4SLDescrTag(d, off, len1);
1402 avio_seek(&d->pb, off + len1, SEEK_SET);
1406 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1407 Mp4Descr *descr, int *descr_count, int max_descr_count)
1409 MP4DescrParseContext d;
1412 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1416 ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1418 *descr_count = d.descr_count;
1422 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1423 Mp4Descr *descr, int *descr_count, int max_descr_count)
1425 MP4DescrParseContext d;
1428 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1432 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1434 *descr_count = d.descr_count;
1438 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1441 MpegTSContext *ts = filter->u.section_filter.opaque;
1443 const uint8_t *p, *p_end;
1445 int mp4_descr_count = 0;
1446 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1448 AVFormatContext *s = ts->stream;
1450 p_end = section + section_len - 4;
1452 if (parse_section_header(&h, &p, p_end) < 0)
1454 if (h.tid != M4OD_TID)
1457 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1458 MAX_MP4_DESCR_COUNT);
1460 for (pid = 0; pid < NB_PID_MAX; pid++) {
1463 for (i = 0; i < mp4_descr_count; i++) {
1466 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1468 if (ts->pids[pid]->type != MPEGTS_PES) {
1469 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1472 pes = ts->pids[pid]->u.pes_filter.opaque;
1477 pes->sl = mp4_descr[i].sl;
1479 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1480 mp4_descr[i].dec_config_descr_len, 0,
1481 NULL, NULL, NULL, NULL);
1482 ff_mp4_read_dec_config_descr(s, st, &pb);
1483 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1484 st->codec->extradata_size > 0)
1485 st->need_parsing = 0;
1486 if (st->codec->codec_id == AV_CODEC_ID_H264 &&
1487 st->codec->extradata_size > 0)
1488 st->need_parsing = 0;
1490 if (st->codec->codec_id <= AV_CODEC_ID_NONE) {
1492 } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_AUDIO)
1493 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1494 else if (st->codec->codec_id < AV_CODEC_ID_FIRST_SUBTITLE)
1495 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1496 else if (st->codec->codec_id < AV_CODEC_ID_FIRST_UNKNOWN)
1497 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1500 for (i = 0; i < mp4_descr_count; i++)
1501 av_free(mp4_descr[i].dec_config_descr);
1504 static const uint8_t opus_coupled_stream_cnt[9] = {
1505 1, 0, 1, 1, 2, 2, 2, 3, 3
1508 static const uint8_t opus_channel_map[8][8] = {
1516 { 0,6,1,2,3,4,5,7 },
1519 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1520 const uint8_t **pp, const uint8_t *desc_list_end,
1521 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1524 const uint8_t *desc_end;
1525 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1529 desc_tag = get8(pp, desc_list_end);
1531 return AVERROR_INVALIDDATA;
1532 desc_len = get8(pp, desc_list_end);
1534 return AVERROR_INVALIDDATA;
1535 desc_end = *pp + desc_len;
1536 if (desc_end > desc_list_end)
1537 return AVERROR_INVALIDDATA;
1539 av_dlog(fc, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1541 if ((st->codec->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1542 stream_type == STREAM_TYPE_PRIVATE_DATA)
1543 mpegts_find_stream_type(st, desc_tag, DESC_types);
1546 case 0x1E: /* SL descriptor */
1547 desc_es_id = get16(pp, desc_end);
1548 if (ts && ts->pids[pid])
1549 ts->pids[pid]->es_id = desc_es_id;
1550 for (i = 0; i < mp4_descr_count; i++)
1551 if (mp4_descr[i].dec_config_descr_len &&
1552 mp4_descr[i].es_id == desc_es_id) {
1554 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1555 mp4_descr[i].dec_config_descr_len, 0,
1556 NULL, NULL, NULL, NULL);
1557 ff_mp4_read_dec_config_descr(fc, st, &pb);
1558 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1559 st->codec->extradata_size > 0)
1560 st->need_parsing = 0;
1561 if (st->codec->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1562 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1565 case 0x1F: /* FMC descriptor */
1566 get16(pp, desc_end);
1567 if (mp4_descr_count > 0 &&
1568 (st->codec->codec_id == AV_CODEC_ID_AAC_LATM || st->request_probe > 0) &&
1569 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1571 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1572 mp4_descr->dec_config_descr_len, 0,
1573 NULL, NULL, NULL, NULL);
1574 ff_mp4_read_dec_config_descr(fc, st, &pb);
1575 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1576 st->codec->extradata_size > 0) {
1577 st->request_probe = st->need_parsing = 0;
1578 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1582 case 0x56: /* DVB teletext descriptor */
1584 uint8_t *extradata = NULL;
1585 int language_count = desc_len / 5;
1587 if (desc_len > 0 && desc_len % 5 != 0)
1588 return AVERROR_INVALIDDATA;
1590 if (language_count > 0) {
1591 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1592 if (language_count > sizeof(language) / 4) {
1593 language_count = sizeof(language) / 4;
1596 if (st->codec->extradata == NULL) {
1597 if (ff_alloc_extradata(st->codec, language_count * 2)) {
1598 return AVERROR(ENOMEM);
1602 if (st->codec->extradata_size < language_count * 2)
1603 return AVERROR_INVALIDDATA;
1605 extradata = st->codec->extradata;
1607 for (i = 0; i < language_count; i++) {
1608 language[i * 4 + 0] = get8(pp, desc_end);
1609 language[i * 4 + 1] = get8(pp, desc_end);
1610 language[i * 4 + 2] = get8(pp, desc_end);
1611 language[i * 4 + 3] = ',';
1613 memcpy(extradata, *pp, 2);
1619 language[i * 4 - 1] = 0;
1620 av_dict_set(&st->metadata, "language", language, 0);
1624 case 0x59: /* subtitling descriptor */
1626 /* 8 bytes per DVB subtitle substream data:
1627 * ISO_639_language_code (3 bytes),
1628 * subtitling_type (1 byte),
1629 * composition_page_id (2 bytes),
1630 * ancillary_page_id (2 bytes) */
1631 int language_count = desc_len / 8;
1633 if (desc_len > 0 && desc_len % 8 != 0)
1634 return AVERROR_INVALIDDATA;
1636 if (language_count > 1) {
1637 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1640 if (language_count > 0) {
1643 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1644 if (language_count > sizeof(language) / 4) {
1645 language_count = sizeof(language) / 4;
1648 if (st->codec->extradata == NULL) {
1649 if (ff_alloc_extradata(st->codec, language_count * 5)) {
1650 return AVERROR(ENOMEM);
1654 if (st->codec->extradata_size < language_count * 5)
1655 return AVERROR_INVALIDDATA;
1657 extradata = st->codec->extradata;
1659 for (i = 0; i < language_count; i++) {
1660 language[i * 4 + 0] = get8(pp, desc_end);
1661 language[i * 4 + 1] = get8(pp, desc_end);
1662 language[i * 4 + 2] = get8(pp, desc_end);
1663 language[i * 4 + 3] = ',';
1665 /* hearing impaired subtitles detection using subtitling_type */
1667 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1668 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1669 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1670 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1671 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1672 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1673 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1677 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1678 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1684 language[i * 4 - 1] = 0;
1685 av_dict_set(&st->metadata, "language", language, 0);
1689 case 0x0a: /* ISO 639 language descriptor */
1690 for (i = 0; i + 4 <= desc_len; i += 4) {
1691 language[i + 0] = get8(pp, desc_end);
1692 language[i + 1] = get8(pp, desc_end);
1693 language[i + 2] = get8(pp, desc_end);
1694 language[i + 3] = ',';
1695 switch (get8(pp, desc_end)) {
1697 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1700 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1703 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1707 if (i && language[0]) {
1708 language[i - 1] = 0;
1709 av_dict_set(&st->metadata, "language", language, 0);
1712 case 0x05: /* registration descriptor */
1713 st->codec->codec_tag = bytestream_get_le32(pp);
1714 av_dlog(fc, "reg_desc=%.4s\n", (char *)&st->codec->codec_tag);
1715 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1716 mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
1718 case 0x52: /* stream identifier descriptor */
1719 st->stream_identifier = 1 + get8(pp, desc_end);
1721 case 0x26: /* metadata descriptor */
1722 if (get16(pp, desc_end) == 0xFFFF)
1724 if (get8(pp, desc_end) == 0xFF) {
1725 st->codec->codec_tag = bytestream_get_le32(pp);
1726 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1727 mpegts_find_stream_type(st, st->codec->codec_tag, METADATA_types);
1730 case 0x7f: /* DVB extension descriptor */
1731 ext_desc_tag = get8(pp, desc_end);
1732 if (ext_desc_tag < 0)
1733 return AVERROR_INVALIDDATA;
1734 if (st->codec->codec_id == AV_CODEC_ID_OPUS &&
1735 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1736 if (!st->codec->extradata) {
1737 st->codec->extradata = av_mallocz(sizeof(opus_default_extradata) +
1738 FF_INPUT_BUFFER_PADDING_SIZE);
1739 if (!st->codec->extradata)
1740 return AVERROR(ENOMEM);
1742 st->codec->extradata_size = sizeof(opus_default_extradata);
1743 memcpy(st->codec->extradata, opus_default_extradata, sizeof(opus_default_extradata));
1745 channel_config_code = get8(pp, desc_end);
1746 if (channel_config_code < 0)
1747 return AVERROR_INVALIDDATA;
1748 if (channel_config_code <= 0x8) {
1749 st->codec->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1750 st->codec->extradata[18] = channels > 2;
1751 st->codec->extradata[19] = channel_config_code;
1752 if (channel_config_code == 0) { /* Dual Mono */
1753 st->codec->extradata[18] = 255; /* Mapping */
1754 st->codec->extradata[19] = 2; /* Stream Count */
1756 st->codec->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1757 memcpy(&st->codec->extradata[21], opus_channel_map[channels - 1], channels);
1759 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1761 st->need_parsing = AVSTREAM_PARSE_FULL;
1772 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1774 MpegTSContext *ts = filter->u.section_filter.opaque;
1775 SectionHeader h1, *h = &h1;
1778 const uint8_t *p, *p_end, *desc_list_end;
1779 int program_info_length, pcr_pid, pid, stream_type;
1781 uint32_t prog_reg_desc = 0; /* registration descriptor */
1783 int mp4_descr_count = 0;
1784 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1787 av_dlog(ts->stream, "PMT: len %i\n", section_len);
1788 hex_dump_debug(ts->stream, section, section_len);
1790 p_end = section + section_len - 4;
1792 if (parse_section_header(h, &p, p_end) < 0)
1795 av_dlog(ts->stream, "sid=0x%x sec_num=%d/%d\n",
1796 h->id, h->sec_num, h->last_sec_num);
1798 if (h->tid != PMT_TID)
1800 if (ts->skip_changes)
1803 clear_program(ts, h->id);
1804 pcr_pid = get16(&p, p_end);
1808 add_pid_to_pmt(ts, h->id, pcr_pid);
1809 set_pcr_pid(ts->stream, h->id, pcr_pid);
1811 av_dlog(ts->stream, "pcr_pid=0x%x\n", pcr_pid);
1813 program_info_length = get16(&p, p_end);
1814 if (program_info_length < 0)
1816 program_info_length &= 0xfff;
1817 while (program_info_length >= 2) {
1819 tag = get8(&p, p_end);
1820 len = get8(&p, p_end);
1822 av_dlog(ts->stream, "program tag: 0x%02x len=%d\n", tag, len);
1824 if (len > program_info_length - 2)
1825 // something else is broken, exit the program_descriptors_loop
1827 program_info_length -= len + 2;
1828 if (tag == 0x1d) { // IOD descriptor
1829 get8(&p, p_end); // scope
1830 get8(&p, p_end); // label
1832 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
1833 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1834 } else if (tag == 0x05 && len >= 4) { // registration descriptor
1835 prog_reg_desc = bytestream_get_le32(&p);
1840 p += program_info_length;
1844 // stop parsing after pmt, we found header
1845 if (!ts->stream->nb_streams)
1848 set_pmt_found(ts, h->id);
1854 stream_type = get8(&p, p_end);
1855 if (stream_type < 0)
1857 pid = get16(&p, p_end);
1861 if (pid == ts->current_pid)
1864 /* now create stream */
1865 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
1866 pes = ts->pids[pid]->u.pes_filter.opaque;
1868 pes->st = avformat_new_stream(pes->stream, NULL);
1871 pes->st->id = pes->pid;
1874 } else if (stream_type != 0x13) {
1876 mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
1877 pes = add_pes_stream(ts, pid, pcr_pid);
1879 st = avformat_new_stream(pes->stream, NULL);
1885 int idx = ff_find_stream_index(ts->stream, pid);
1887 st = ts->stream->streams[idx];
1889 st = avformat_new_stream(ts->stream, NULL);
1893 st->codec->codec_type = AVMEDIA_TYPE_DATA;
1900 if (pes && !pes->stream_type)
1901 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
1903 add_pid_to_pmt(ts, h->id, pid);
1905 ff_program_add_stream_index(ts->stream, h->id, st->index);
1907 desc_list_len = get16(&p, p_end);
1908 if (desc_list_len < 0)
1910 desc_list_len &= 0xfff;
1911 desc_list_end = p + desc_list_len;
1912 if (desc_list_end > p_end)
1915 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
1916 desc_list_end, mp4_descr,
1917 mp4_descr_count, pid, ts) < 0)
1920 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
1921 stream_type == 0x83 && pes->sub_st) {
1922 ff_program_add_stream_index(ts->stream, h->id,
1923 pes->sub_st->index);
1924 pes->sub_st->codec->codec_tag = st->codec->codec_tag;
1930 if (!ts->pids[pcr_pid])
1931 mpegts_open_pcr_filter(ts, pcr_pid);
1934 for (i = 0; i < mp4_descr_count; i++)
1935 av_free(mp4_descr[i].dec_config_descr);
1938 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1940 MpegTSContext *ts = filter->u.section_filter.opaque;
1941 SectionHeader h1, *h = &h1;
1942 const uint8_t *p, *p_end;
1946 av_dlog(ts->stream, "PAT:\n");
1947 hex_dump_debug(ts->stream, section, section_len);
1949 p_end = section + section_len - 4;
1951 if (parse_section_header(h, &p, p_end) < 0)
1953 if (h->tid != PAT_TID)
1955 if (ts->skip_changes)
1958 ts->stream->ts_id = h->id;
1962 sid = get16(&p, p_end);
1965 pmt_pid = get16(&p, p_end);
1970 if (pmt_pid == ts->current_pid)
1973 av_dlog(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
1975 if (sid == 0x0000) {
1978 MpegTSFilter *fil = ts->pids[pmt_pid];
1979 program = av_new_program(ts->stream, sid);
1981 program->program_num = sid;
1982 program->pmt_pid = pmt_pid;
1985 if ( fil->type != MPEGTS_SECTION
1986 || fil->pid != pmt_pid
1987 || fil->u.section_filter.section_cb != pmt_cb)
1988 mpegts_close_filter(ts, ts->pids[pmt_pid]);
1990 if (!ts->pids[pmt_pid])
1991 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
1992 add_pat_entry(ts, sid);
1993 add_pid_to_pmt(ts, sid, 0); // add pat pid to program
1994 add_pid_to_pmt(ts, sid, pmt_pid);
2000 for (j=0; j<ts->stream->nb_programs; j++) {
2001 for (i = 0; i < ts->nb_prg; i++)
2002 if (ts->prg[i].id == ts->stream->programs[j]->id)
2004 if (i==ts->nb_prg && !ts->skip_clear)
2005 clear_avprogram(ts, ts->stream->programs[j]->id);
2010 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2012 MpegTSContext *ts = filter->u.section_filter.opaque;
2013 SectionHeader h1, *h = &h1;
2014 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2015 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2016 char *name, *provider_name;
2018 av_dlog(ts->stream, "SDT:\n");
2019 hex_dump_debug(ts->stream, section, section_len);
2021 p_end = section + section_len - 4;
2023 if (parse_section_header(h, &p, p_end) < 0)
2025 if (h->tid != SDT_TID)
2027 if (ts->skip_changes)
2029 onid = get16(&p, p_end);
2032 val = get8(&p, p_end);
2036 sid = get16(&p, p_end);
2039 val = get8(&p, p_end);
2042 desc_list_len = get16(&p, p_end);
2043 if (desc_list_len < 0)
2045 desc_list_len &= 0xfff;
2046 desc_list_end = p + desc_list_len;
2047 if (desc_list_end > p_end)
2050 desc_tag = get8(&p, desc_list_end);
2053 desc_len = get8(&p, desc_list_end);
2054 desc_end = p + desc_len;
2055 if (desc_len < 0 || desc_end > desc_list_end)
2058 av_dlog(ts->stream, "tag: 0x%02x len=%d\n",
2059 desc_tag, desc_len);
2063 service_type = get8(&p, p_end);
2064 if (service_type < 0)
2066 provider_name = getstr8(&p, p_end);
2069 name = getstr8(&p, p_end);
2071 AVProgram *program = av_new_program(ts->stream, sid);
2073 av_dict_set(&program->metadata, "service_name", name, 0);
2074 av_dict_set(&program->metadata, "service_provider",
2079 av_free(provider_name);
2090 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2091 const uint8_t *packet);
2093 /* handle one TS packet */
2094 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2097 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2098 has_adaptation, has_payload;
2099 const uint8_t *p, *p_end;
2102 pid = AV_RB16(packet + 1) & 0x1fff;
2103 if (pid && discard_pid(ts, pid))
2105 is_start = packet[1] & 0x40;
2106 tss = ts->pids[pid];
2107 if (ts->auto_guess && !tss && is_start) {
2108 add_pes_stream(ts, pid, -1);
2109 tss = ts->pids[pid];
2113 ts->current_pid = pid;
2115 afc = (packet[3] >> 4) & 3;
2116 if (afc == 0) /* reserved value */
2118 has_adaptation = afc & 2;
2119 has_payload = afc & 1;
2120 is_discontinuity = has_adaptation &&
2121 packet[4] != 0 && /* with length > 0 */
2122 (packet[5] & 0x80); /* and discontinuity indicated */
2124 /* continuity check (currently not used) */
2125 cc = (packet[3] & 0xf);
2126 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2127 cc_ok = pid == 0x1FFF || // null packet PID
2134 av_log(ts->stream, AV_LOG_DEBUG,
2135 "Continuity check failed for pid %d expected %d got %d\n",
2136 pid, expected_cc, cc);
2137 if (tss->type == MPEGTS_PES) {
2138 PESContext *pc = tss->u.pes_filter.opaque;
2139 pc->flags |= AV_PKT_FLAG_CORRUPT;
2144 if (has_adaptation) {
2147 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2148 tss->last_pcr = pcr_h * 300 + pcr_l;
2149 /* skip adaptation field */
2152 /* if past the end of packet, ignore */
2153 p_end = packet + TS_PACKET_SIZE;
2154 if (p >= p_end || !has_payload)
2157 pos = avio_tell(ts->stream->pb);
2159 av_assert0(pos >= TS_PACKET_SIZE);
2160 ts->pos47_full = pos - TS_PACKET_SIZE;
2163 if (tss->type == MPEGTS_SECTION) {
2165 /* pointer field present */
2167 if (p + len > p_end)
2170 /* write remaining section bytes */
2171 write_section_data(ts, tss,
2173 /* check whether filter has been closed */
2179 write_section_data(ts, tss,
2184 write_section_data(ts, tss,
2189 // stop find_stream_info from waiting for more streams
2190 // when all programs have received a PMT
2191 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER) {
2193 for (i = 0; i < ts->nb_prg; i++) {
2194 if (!ts->prg[i].pmt_found)
2197 if (i == ts->nb_prg && ts->nb_prg > 0) {
2198 if (ts->stream->nb_streams > 1 || pos > 100000) {
2199 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2200 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2207 // Note: The position here points actually behind the current packet.
2208 if (tss->type == MPEGTS_PES) {
2209 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2210 pos - ts->raw_packet_size)) < 0)
2218 static void reanalyze(MpegTSContext *ts) {
2219 AVIOContext *pb = ts->stream->pb;
2220 int64_t pos = avio_tell(pb);
2223 pos -= ts->pos47_full;
2224 if (pos == TS_PACKET_SIZE) {
2225 ts->size_stat[0] ++;
2226 } else if (pos == TS_DVHS_PACKET_SIZE) {
2227 ts->size_stat[1] ++;
2228 } else if (pos == TS_FEC_PACKET_SIZE) {
2229 ts->size_stat[2] ++;
2232 ts->size_stat_count ++;
2233 if (ts->size_stat_count > SIZE_STAT_THRESHOLD) {
2235 if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2236 newsize = TS_PACKET_SIZE;
2237 } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2238 newsize = TS_DVHS_PACKET_SIZE;
2239 } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2240 newsize = TS_FEC_PACKET_SIZE;
2242 if (newsize && newsize != ts->raw_packet_size) {
2243 av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2244 ts->raw_packet_size = newsize;
2246 ts->size_stat_count = 0;
2247 memset(ts->size_stat, 0, sizeof(ts->size_stat));
2251 /* XXX: try to find a better synchro over several packets (use
2252 * get_packet_size() ?) */
2253 static int mpegts_resync(AVFormatContext *s)
2255 MpegTSContext *ts = s->priv_data;
2256 AVIOContext *pb = s->pb;
2259 for (i = 0; i < ts->resync_size; i++) {
2264 avio_seek(pb, -1, SEEK_CUR);
2265 reanalyze(s->priv_data);
2269 av_log(s, AV_LOG_ERROR,
2270 "max resync size reached, could not find sync byte\n");
2272 return AVERROR_INVALIDDATA;
2275 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2276 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2277 const uint8_t **data)
2279 AVIOContext *pb = s->pb;
2283 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2284 if (len != TS_PACKET_SIZE)
2285 return len < 0 ? len : AVERROR_EOF;
2286 /* check packet sync byte */
2287 if ((*data)[0] != 0x47) {
2288 /* find a new packet start */
2289 uint64_t pos = avio_tell(pb);
2290 avio_seek(pb, -FFMIN(raw_packet_size, pos), SEEK_CUR);
2292 if (mpegts_resync(s) < 0)
2293 return AVERROR(EAGAIN);
2303 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2305 AVIOContext *pb = s->pb;
2306 int skip = raw_packet_size - TS_PACKET_SIZE;
2308 avio_skip(pb, skip);
2311 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2313 AVFormatContext *s = ts->stream;
2314 uint8_t packet[TS_PACKET_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
2315 const uint8_t *data;
2319 if (avio_tell(s->pb) != ts->last_pos) {
2321 av_dlog(ts->stream, "Skipping after seek\n");
2322 /* seek detected, flush pes buffer */
2323 for (i = 0; i < NB_PID_MAX; i++) {
2325 if (ts->pids[i]->type == MPEGTS_PES) {
2326 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2327 av_buffer_unref(&pes->buffer);
2328 pes->data_index = 0;
2329 pes->state = MPEGTS_SKIP; /* skip until pes header */
2331 ts->pids[i]->last_cc = -1;
2332 ts->pids[i]->last_pcr = -1;
2339 memset(packet + TS_PACKET_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
2342 if (nb_packets != 0 && packet_num >= nb_packets ||
2343 ts->stop_parse > 1) {
2344 ret = AVERROR(EAGAIN);
2347 if (ts->stop_parse > 0)
2350 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2353 ret = handle_packet(ts, data);
2354 finished_reading_packet(s, ts->raw_packet_size);
2358 ts->last_pos = avio_tell(s->pb);
2362 static int mpegts_probe(AVProbeData *p)
2364 const int size = p->buf_size;
2368 int check_count = size / TS_FEC_PACKET_SIZE;
2369 #define CHECK_COUNT 10
2370 #define CHECK_BLOCK 100
2372 if (check_count < CHECK_COUNT)
2373 return AVERROR_INVALIDDATA;
2375 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2376 int left = FFMIN(check_count - i, CHECK_BLOCK);
2377 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , NULL);
2378 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, NULL);
2379 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , NULL);
2380 score = FFMAX3(score, dvhs_score, fec_score);
2382 maxscore = FFMAX(maxscore, score);
2385 sumscore = sumscore * CHECK_COUNT / check_count;
2386 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2388 av_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2390 if (sumscore > 6) return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2391 else if (maxscore > 6) return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2393 return AVERROR_INVALIDDATA;
2396 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
2397 * (-1) if not available */
2398 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2400 int afc, len, flags;
2404 afc = (packet[3] >> 4) & 3;
2406 return AVERROR_INVALIDDATA;
2411 return AVERROR_INVALIDDATA;
2414 if (!(flags & 0x10))
2415 return AVERROR_INVALIDDATA;
2417 return AVERROR_INVALIDDATA;
2419 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2420 *ppcr_low = ((p[4] & 1) << 8) | p[5];
2424 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2426 /* NOTE: We attempt to seek on non-seekable files as well, as the
2427 * probe buffer usually is big enough. Only warn if the seek failed
2428 * on files where the seek should work. */
2429 if (avio_seek(pb, pos, SEEK_SET) < 0)
2430 av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2433 static int mpegts_read_header(AVFormatContext *s)
2435 MpegTSContext *ts = s->priv_data;
2436 AVIOContext *pb = s->pb;
2437 uint8_t buf[8 * 1024] = {0};
2439 int64_t pos, probesize = s->probesize ? s->probesize : s->probesize2;
2441 ffio_ensure_seekback(pb, probesize);
2443 /* read the first 8192 bytes to get packet size */
2444 pos = avio_tell(pb);
2445 len = avio_read(pb, buf, sizeof(buf));
2446 ts->raw_packet_size = get_packet_size(buf, len);
2447 if (ts->raw_packet_size <= 0) {
2448 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2449 ts->raw_packet_size = TS_PACKET_SIZE;
2454 if (s->iformat == &ff_mpegts_demuxer) {
2457 /* first do a scan to get all the services */
2458 seek_back(s, pb, pos);
2460 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2462 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2464 handle_packets(ts, probesize / ts->raw_packet_size);
2465 /* if could not find service, enable auto_guess */
2469 av_dlog(ts->stream, "tuning done\n");
2471 s->ctx_flags |= AVFMTCTX_NOHEADER;
2474 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2475 int64_t pcrs[2], pcr_h;
2476 int packet_count[2];
2477 uint8_t packet[TS_PACKET_SIZE];
2478 const uint8_t *data;
2480 /* only read packets */
2482 st = avformat_new_stream(s, NULL);
2484 return AVERROR(ENOMEM);
2485 avpriv_set_pts_info(st, 60, 1, 27000000);
2486 st->codec->codec_type = AVMEDIA_TYPE_DATA;
2487 st->codec->codec_id = AV_CODEC_ID_MPEG2TS;
2489 /* we iterate until we find two PCRs to estimate the bitrate */
2494 ret = read_packet(s, packet, ts->raw_packet_size, &data);
2497 pid = AV_RB16(data + 1) & 0x1fff;
2498 if ((pcr_pid == -1 || pcr_pid == pid) &&
2499 parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2500 finished_reading_packet(s, ts->raw_packet_size);
2502 packet_count[nb_pcrs] = nb_packets;
2503 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2508 finished_reading_packet(s, ts->raw_packet_size);
2513 /* NOTE1: the bitrate is computed without the FEC */
2514 /* NOTE2: it is only the bitrate of the start of the stream */
2515 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2516 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2517 s->bit_rate = TS_PACKET_SIZE * 8 * 27e6 / ts->pcr_incr;
2518 st->codec->bit_rate = s->bit_rate;
2519 st->start_time = ts->cur_pcr;
2520 av_dlog(ts->stream, "start=%0.3f pcr=%0.3f incr=%d\n",
2521 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2524 seek_back(s, pb, pos);
2528 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2530 static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
2532 MpegTSContext *ts = s->priv_data;
2534 int64_t pcr_h, next_pcr_h, pos;
2535 int pcr_l, next_pcr_l;
2536 uint8_t pcr_buf[12];
2537 const uint8_t *data;
2539 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2540 return AVERROR(ENOMEM);
2541 ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2542 pkt->pos = avio_tell(s->pb);
2544 av_free_packet(pkt);
2547 if (data != pkt->data)
2548 memcpy(pkt->data, data, ts->raw_packet_size);
2549 finished_reading_packet(s, ts->raw_packet_size);
2550 if (ts->mpeg2ts_compute_pcr) {
2551 /* compute exact PCR for each packet */
2552 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2553 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2554 pos = avio_tell(s->pb);
2555 for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
2556 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2557 avio_read(s->pb, pcr_buf, 12);
2558 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2559 /* XXX: not precise enough */
2561 ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2566 avio_seek(s->pb, pos, SEEK_SET);
2567 /* no next PCR found: we use previous increment */
2568 ts->cur_pcr = pcr_h * 300 + pcr_l;
2570 pkt->pts = ts->cur_pcr;
2571 pkt->duration = ts->pcr_incr;
2572 ts->cur_pcr += ts->pcr_incr;
2574 pkt->stream_index = 0;
2578 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
2580 MpegTSContext *ts = s->priv_data;
2585 ret = handle_packets(ts, 0);
2587 av_free_packet(ts->pkt);
2588 /* flush pes data left */
2589 for (i = 0; i < NB_PID_MAX; i++)
2590 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2591 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2592 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2593 new_pes_packet(pes, pkt);
2594 pes->state = MPEGTS_SKIP;
2601 if (!ret && pkt->size < 0)
2602 ret = AVERROR(EINTR);
2606 static void mpegts_free(MpegTSContext *ts)
2612 for (i = 0; i < NB_PID_MAX; i++)
2614 mpegts_close_filter(ts, ts->pids[i]);
2617 static int mpegts_read_close(AVFormatContext *s)
2619 MpegTSContext *ts = s->priv_data;
2624 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2625 int64_t *ppos, int64_t pos_limit)
2627 MpegTSContext *ts = s->priv_data;
2628 int64_t pos, timestamp;
2629 uint8_t buf[TS_PACKET_SIZE];
2630 int pcr_l, pcr_pid =
2631 ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
2632 int pos47 = ts->pos47_full % ts->raw_packet_size;
2634 ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
2635 ts->raw_packet_size + pos47;
2636 while(pos < pos_limit) {
2637 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2638 return AV_NOPTS_VALUE;
2639 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2640 return AV_NOPTS_VALUE;
2641 if (buf[0] != 0x47) {
2642 avio_seek(s->pb, -TS_PACKET_SIZE, SEEK_CUR);
2643 if (mpegts_resync(s) < 0)
2644 return AV_NOPTS_VALUE;
2645 pos = avio_tell(s->pb);
2648 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2649 parse_pcr(×tamp, &pcr_l, buf) == 0) {
2653 pos += ts->raw_packet_size;
2656 return AV_NOPTS_VALUE;
2659 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2660 int64_t *ppos, int64_t pos_limit)
2662 MpegTSContext *ts = s->priv_data;
2664 int pos47 = ts->pos47_full % ts->raw_packet_size;
2665 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
2666 ff_read_frame_flush(s);
2667 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2668 return AV_NOPTS_VALUE;
2669 while(pos < pos_limit) {
2672 av_init_packet(&pkt);
2673 ret = av_read_frame(s, &pkt);
2675 return AV_NOPTS_VALUE;
2676 av_free_packet(&pkt);
2677 if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
2678 ff_reduce_index(s, pkt.stream_index);
2679 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
2680 if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
2688 return AV_NOPTS_VALUE;
2691 /**************************************************************/
2692 /* parsing functions - called from other demuxers such as RTP */
2694 MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
2698 ts = av_mallocz(sizeof(MpegTSContext));
2701 /* no stream case, currently used by RTP */
2702 ts->raw_packet_size = TS_PACKET_SIZE;
2705 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2706 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2711 /* return the consumed length if a packet was output, or -1 if no
2712 * packet is output */
2713 int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
2714 const uint8_t *buf, int len)
2722 if (len < TS_PACKET_SIZE)
2723 return AVERROR_INVALIDDATA;
2724 if (buf[0] != 0x47) {
2728 handle_packet(ts, buf);
2729 buf += TS_PACKET_SIZE;
2730 len -= TS_PACKET_SIZE;
2731 if (ts->stop_parse == 1)
2738 void avpriv_mpegts_parse_close(MpegTSContext *ts)
2744 AVInputFormat ff_mpegts_demuxer = {
2746 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2747 .priv_data_size = sizeof(MpegTSContext),
2748 .read_probe = mpegts_probe,
2749 .read_header = mpegts_read_header,
2750 .read_packet = mpegts_read_packet,
2751 .read_close = mpegts_read_close,
2752 .read_timestamp = mpegts_get_dts,
2753 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2754 .priv_class = &mpegts_class,
2757 AVInputFormat ff_mpegtsraw_demuxer = {
2758 .name = "mpegtsraw",
2759 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
2760 .priv_data_size = sizeof(MpegTSContext),
2761 .read_header = mpegts_read_header,
2762 .read_packet = mpegts_raw_read_packet,
2763 .read_close = mpegts_read_close,
2764 .read_timestamp = mpegts_get_dts,
2765 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2766 .priv_class = &mpegtsraw_class,