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"
35 #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 enum MpegTSFilterType {
53 typedef struct MpegTSFilter MpegTSFilter;
55 typedef int PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos);
57 typedef struct MpegTSPESFilter {
62 typedef void SectionCallback(MpegTSFilter *f, const uint8_t *buf, int len);
64 typedef void SetServiceCallback(void *opaque, int ret);
66 typedef struct MpegTSSectionFilter {
70 unsigned int check_crc:1;
71 unsigned int end_of_section_reached:1;
72 SectionCallback *section_cb;
74 } MpegTSSectionFilter;
79 int last_cc; /* last cc code (-1 if first packet) */
80 enum MpegTSFilterType type;
82 MpegTSPESFilter pes_filter;
83 MpegTSSectionFilter section_filter;
87 #define MAX_PIDS_PER_PROGRAM 64
89 unsigned int id; //program id/service id
91 unsigned int pids[MAX_PIDS_PER_PROGRAM];
94 struct MpegTSContext {
97 AVFormatContext *stream;
98 /** raw packet size, including FEC if present */
103 /** if true, all pids are analyzed to find streams */
106 /** compute exact PCR for each transport stream packet */
107 int mpeg2ts_compute_pcr;
109 int64_t cur_pcr; /**< used to estimate the exact PCR */
110 int pcr_incr; /**< used to estimate the exact PCR */
112 /* data needed to handle file based ts */
113 /** stop parsing loop */
115 /** packet containing Audio/Video data */
117 /** to detect seek */
120 /******************************************/
121 /* private mpegts data */
123 /** structure to keep track of Program->pids mapping */
127 int8_t crc_validity[NB_PID_MAX];
129 /** filters for various streams specified by PMT + for the PAT and PMT */
130 MpegTSFilter *pids[NB_PID_MAX];
134 static const AVOption options[] = {
135 {"compute_pcr", "Compute exact PCR for each transport stream packet.", offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT,
136 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
140 static const AVClass mpegtsraw_class = {
141 .class_name = "mpegtsraw demuxer",
142 .item_name = av_default_item_name,
144 .version = LIBAVUTIL_VERSION_INT,
147 /* TS stream handling */
152 MPEGTS_PESHEADER_FILL,
157 /* enough for PES header + length */
158 #define PES_START_SIZE 6
159 #define PES_HEADER_SIZE 9
160 #define MAX_PES_HEADER_SIZE (9 + 255)
162 typedef struct PESContext {
164 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
167 AVFormatContext *stream;
169 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
170 enum MpegTSState state;
171 /* used to get the format */
173 int flags; /**< copied to the AVPacket flags */
176 int extended_stream_id;
178 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
179 uint8_t header[MAX_PES_HEADER_SIZE];
184 extern AVInputFormat ff_mpegts_demuxer;
186 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
188 AVProgram *prg = NULL;
190 for(i=0; i<ts->stream->nb_programs; i++)
191 if(ts->stream->programs[i]->id == programid){
192 prg = ts->stream->programs[i];
197 prg->nb_stream_indexes = 0;
200 static void clear_program(MpegTSContext *ts, unsigned int programid)
204 clear_avprogram(ts, programid);
205 for(i=0; i<ts->nb_prg; i++)
206 if(ts->prg[i].id == programid)
207 ts->prg[i].nb_pids = 0;
210 static void clear_programs(MpegTSContext *ts)
216 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
219 void *tmp = av_realloc(ts->prg, (ts->nb_prg+1)*sizeof(struct Program));
223 p = &ts->prg[ts->nb_prg];
229 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned int pid)
232 struct Program *p = NULL;
233 for(i=0; i<ts->nb_prg; i++) {
234 if(ts->prg[i].id == programid) {
242 if(p->nb_pids >= MAX_PIDS_PER_PROGRAM)
244 p->pids[p->nb_pids++] = pid;
247 static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
250 for(i=0; i<s->nb_programs; i++) {
251 if(s->programs[i]->id == programid) {
252 s->programs[i]->pcr_pid = pid;
259 * @brief discard_pid() decides if the pid is to be discarded according
260 * to caller's programs selection
261 * @param ts : - TS context
263 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
266 static int discard_pid(MpegTSContext *ts, unsigned int pid)
269 int used = 0, discarded = 0;
271 for(i=0; i<ts->nb_prg; i++) {
273 for(j=0; j<p->nb_pids; j++) {
274 if(p->pids[j] != pid)
276 //is program with id p->id set to be discarded?
277 for(k=0; k<ts->stream->nb_programs; k++) {
278 if(ts->stream->programs[k]->id == p->id) {
279 if(ts->stream->programs[k]->discard == AVDISCARD_ALL)
288 return !used && discarded;
292 * Assemble PES packets out of TS packets, and then call the "section_cb"
293 * function when they are complete.
295 static void write_section_data(AVFormatContext *s, MpegTSFilter *tss1,
296 const uint8_t *buf, int buf_size, int is_start)
298 MpegTSContext *ts = s->priv_data;
299 MpegTSSectionFilter *tss = &tss1->u.section_filter;
303 memcpy(tss->section_buf, buf, buf_size);
304 tss->section_index = buf_size;
305 tss->section_h_size = -1;
306 tss->end_of_section_reached = 0;
308 if (tss->end_of_section_reached)
310 len = 4096 - tss->section_index;
313 memcpy(tss->section_buf + tss->section_index, buf, len);
314 tss->section_index += len;
317 /* compute section length if possible */
318 if (tss->section_h_size == -1 && tss->section_index >= 3) {
319 len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
322 tss->section_h_size = len;
325 if (tss->section_h_size != -1 && tss->section_index >= tss->section_h_size) {
327 tss->end_of_section_reached = 1;
330 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, tss->section_buf, tss->section_h_size);
332 ts->crc_validity[ tss1->pid ] = 100;
333 }else if(ts->crc_validity[ tss1->pid ] > -10){
334 ts->crc_validity[ tss1->pid ]--;
339 tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
343 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid,
344 SectionCallback *section_cb, void *opaque,
348 MpegTSFilter *filter;
349 MpegTSSectionFilter *sec;
351 av_dlog(ts->stream, "Filter: pid=0x%x\n", pid);
353 if (pid >= NB_PID_MAX || ts->pids[pid])
355 filter = av_mallocz(sizeof(MpegTSFilter));
358 ts->pids[pid] = filter;
359 filter->type = MPEGTS_SECTION;
362 filter->last_cc = -1;
363 sec = &filter->u.section_filter;
364 sec->section_cb = section_cb;
365 sec->opaque = opaque;
366 sec->section_buf = av_malloc(MAX_SECTION_SIZE);
367 sec->check_crc = check_crc;
368 if (!sec->section_buf) {
375 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
379 MpegTSFilter *filter;
380 MpegTSPESFilter *pes;
382 if (pid >= NB_PID_MAX || ts->pids[pid])
384 filter = av_mallocz(sizeof(MpegTSFilter));
387 ts->pids[pid] = filter;
388 filter->type = MPEGTS_PES;
391 filter->last_cc = -1;
392 pes = &filter->u.pes_filter;
393 pes->pes_cb = pes_cb;
394 pes->opaque = opaque;
398 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
403 if (filter->type == MPEGTS_SECTION)
404 av_freep(&filter->u.section_filter.section_buf);
405 else if (filter->type == MPEGTS_PES) {
406 PESContext *pes = filter->u.pes_filter.opaque;
407 av_buffer_unref(&pes->buffer);
408 /* referenced private data will be freed later in
409 * avformat_close_input */
410 if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
411 av_freep(&filter->u.pes_filter.opaque);
416 ts->pids[pid] = NULL;
419 static int analyze(const uint8_t *buf, int size, int packet_size, int *index){
420 int stat[TS_MAX_PACKET_SIZE];
425 memset(stat, 0, packet_size*sizeof(int));
427 for(x=i=0; i<size-3; i++){
428 if(buf[i] == 0x47 && !(buf[i+1] & 0x80) && buf[i+3] != 0x47){
430 if(stat[x] > best_score){
437 if(x == packet_size) x= 0;
443 /* autodetect fec presence. Must have at least 1024 bytes */
444 static int get_packet_size(const uint8_t *buf, int size)
446 int score, fec_score, dvhs_score;
448 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
451 score = analyze(buf, size, TS_PACKET_SIZE, NULL);
452 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL);
453 fec_score= analyze(buf, size, TS_FEC_PACKET_SIZE, NULL);
454 av_dlog(NULL, "score: %d, dvhs_score: %d, fec_score: %d \n",
455 score, dvhs_score, fec_score);
457 if (score > fec_score && score > dvhs_score) return TS_PACKET_SIZE;
458 else if(dvhs_score > score && dvhs_score > fec_score) return TS_DVHS_PACKET_SIZE;
459 else if(score < fec_score && dvhs_score < fec_score) return TS_FEC_PACKET_SIZE;
463 typedef struct SectionHeader {
468 uint8_t last_sec_num;
471 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
484 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
490 if ((p + 1) >= p_end)
498 /* read and allocate a DVB string preceded by its length */
499 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
506 len = get8(&p, p_end);
509 if ((p + len) > p_end)
511 str = av_malloc(len + 1);
521 static int parse_section_header(SectionHeader *h,
522 const uint8_t **pp, const uint8_t *p_end)
526 val = get8(pp, p_end);
531 val = get16(pp, p_end);
535 val = get8(pp, p_end);
538 h->version = (val >> 1) & 0x1f;
539 val = get8(pp, p_end);
543 val = get8(pp, p_end);
546 h->last_sec_num = val;
551 uint32_t stream_type;
552 enum AVMediaType codec_type;
553 enum AVCodecID codec_id;
556 static const StreamType ISO_types[] = {
557 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
558 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
559 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
560 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
561 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
562 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
563 /* Makito encoder sets stream type 0x11 for AAC,
564 * so auto-detect LOAS/LATM instead of hardcoding it. */
565 #if !CONFIG_LOAS_DEMUXER
566 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
568 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
569 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
570 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
571 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
575 static const StreamType HDMV_types[] = {
576 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
577 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
578 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
579 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
580 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
581 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
582 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
583 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
584 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
585 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
590 static const StreamType MISC_types[] = {
591 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
592 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
596 static const StreamType REGD_types[] = {
597 { MKTAG('d','r','a','c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
598 { MKTAG('A','C','-','3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
599 { MKTAG('B','S','S','D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
600 { MKTAG('D','T','S','1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
601 { MKTAG('D','T','S','2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
602 { MKTAG('D','T','S','3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
603 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
604 { MKTAG('V','C','-','1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
608 /* descriptor present */
609 static const StreamType DESC_types[] = {
610 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
611 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
612 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
613 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
614 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
618 static void mpegts_find_stream_type(AVStream *st,
619 uint32_t stream_type, const StreamType *types)
621 if (avcodec_is_open(st->codec)) {
622 av_log(NULL, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
626 for (; types->stream_type; types++) {
627 if (stream_type == types->stream_type) {
628 st->codec->codec_type = types->codec_type;
629 st->codec->codec_id = types->codec_id;
630 st->request_probe = 0;
636 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
637 uint32_t stream_type, uint32_t prog_reg_desc)
639 int old_codec_type= st->codec->codec_type;
640 int old_codec_id = st->codec->codec_id;
642 if (avcodec_is_open(st->codec)) {
643 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
647 avpriv_set_pts_info(st, 33, 1, 90000);
649 st->codec->codec_type = AVMEDIA_TYPE_DATA;
650 st->codec->codec_id = AV_CODEC_ID_NONE;
651 st->need_parsing = AVSTREAM_PARSE_FULL;
653 pes->stream_type = stream_type;
655 av_log(pes->stream, AV_LOG_DEBUG,
656 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
657 st->index, pes->stream_type, pes->pid, (char*)&prog_reg_desc);
659 st->codec->codec_tag = pes->stream_type;
661 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
662 if ((prog_reg_desc == AV_RL32("HDMV") ||
663 prog_reg_desc == AV_RL32("HDPR")) &&
664 st->codec->codec_id == AV_CODEC_ID_NONE) {
665 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
666 if (pes->stream_type == 0x83) {
667 // HDMV TrueHD streams also contain an AC3 coded version of the
668 // audio track - add a second stream for this
670 // priv_data cannot be shared between streams
671 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
673 return AVERROR(ENOMEM);
674 memcpy(sub_pes, pes, sizeof(*sub_pes));
676 sub_st = avformat_new_stream(pes->stream, NULL);
679 return AVERROR(ENOMEM);
682 sub_st->id = pes->pid;
683 avpriv_set_pts_info(sub_st, 33, 1, 90000);
684 sub_st->priv_data = sub_pes;
685 sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
686 sub_st->codec->codec_id = AV_CODEC_ID_AC3;
687 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
688 sub_pes->sub_st = pes->sub_st = sub_st;
691 if (st->codec->codec_id == AV_CODEC_ID_NONE)
692 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
693 if (st->codec->codec_id == AV_CODEC_ID_NONE){
694 st->codec->codec_id = old_codec_id;
695 st->codec->codec_type= old_codec_type;
701 static void new_pes_packet(PESContext *pes, AVPacket *pkt)
705 pkt->buf = pes->buffer;
706 pkt->data = pes->buffer->data;
707 pkt->size = pes->data_index;
709 if(pes->total_size != MAX_PES_PAYLOAD &&
710 pes->pes_header_size + pes->data_index != pes->total_size + PES_START_SIZE) {
711 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
712 pes->flags |= AV_PKT_FLAG_CORRUPT;
714 memset(pkt->data+pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
716 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
717 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
718 pkt->stream_index = pes->sub_st->index;
720 pkt->stream_index = pes->st->index;
723 /* store position of first TS packet of this PES packet */
724 pkt->pos = pes->ts_packet_pos;
725 pkt->flags = pes->flags;
727 /* reset pts values */
728 pes->pts = AV_NOPTS_VALUE;
729 pes->dts = AV_NOPTS_VALUE;
735 static uint64_t get_ts64(GetBitContext *gb, int bits)
737 if (get_bits_left(gb) < bits)
738 return AV_NOPTS_VALUE;
739 return get_bits64(gb, bits);
742 static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf, int buf_size)
745 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
746 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
747 int dts_flag = -1, cts_flag = -1;
748 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
750 init_get_bits(&gb, buf, buf_size*8);
752 if (sl->use_au_start)
753 au_start_flag = get_bits1(&gb);
755 au_end_flag = get_bits1(&gb);
756 if (!sl->use_au_start && !sl->use_au_end)
757 au_start_flag = au_end_flag = 1;
759 ocr_flag = get_bits1(&gb);
761 idle_flag = get_bits1(&gb);
763 padding_flag = get_bits1(&gb);
765 padding_bits = get_bits(&gb, 3);
767 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
768 if (sl->packet_seq_num_len)
769 skip_bits_long(&gb, sl->packet_seq_num_len);
770 if (sl->degr_prior_len)
772 skip_bits(&gb, sl->degr_prior_len);
774 skip_bits_long(&gb, sl->ocr_len);
776 if (sl->use_rand_acc_pt)
778 if (sl->au_seq_num_len > 0)
779 skip_bits_long(&gb, sl->au_seq_num_len);
780 if (sl->use_timestamps) {
781 dts_flag = get_bits1(&gb);
782 cts_flag = get_bits1(&gb);
785 if (sl->inst_bitrate_len)
786 inst_bitrate_flag = get_bits1(&gb);
788 dts = get_ts64(&gb, sl->timestamp_len);
790 cts = get_ts64(&gb, sl->timestamp_len);
792 skip_bits_long(&gb, sl->au_len);
793 if (inst_bitrate_flag)
794 skip_bits_long(&gb, sl->inst_bitrate_len);
797 if (dts != AV_NOPTS_VALUE)
799 if (cts != AV_NOPTS_VALUE)
802 if (sl->timestamp_len && sl->timestamp_res)
803 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
805 return (get_bits_count(&gb) + 7) >> 3;
808 /* return non zero if a packet could be constructed */
809 static int mpegts_push_data(MpegTSFilter *filter,
810 const uint8_t *buf, int buf_size, int is_start,
813 PESContext *pes = filter->u.pes_filter.opaque;
814 MpegTSContext *ts = pes->ts;
822 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
823 new_pes_packet(pes, ts->pkt);
826 pes->state = MPEGTS_HEADER;
828 pes->ts_packet_pos = pos;
831 while (buf_size > 0) {
834 len = PES_START_SIZE - pes->data_index;
837 memcpy(pes->header + pes->data_index, p, len);
838 pes->data_index += len;
841 if (pes->data_index == PES_START_SIZE) {
842 /* we got all the PES or section header. We can now
844 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
845 pes->header[2] == 0x01) {
846 /* it must be an mpeg2 PES stream */
847 code = pes->header[3] | 0x100;
848 av_dlog(pes->stream, "pid=%x pes_code=%#x\n", pes->pid, code);
850 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
851 (!pes->sub_st || pes->sub_st->discard == AVDISCARD_ALL)) ||
852 code == 0x1be) /* padding_stream */
855 /* stream not present in PMT */
857 pes->st = avformat_new_stream(ts->stream, NULL);
859 return AVERROR(ENOMEM);
860 pes->st->id = pes->pid;
861 mpegts_set_stream_info(pes->st, pes, 0, 0);
864 pes->total_size = AV_RB16(pes->header + 4);
865 /* NOTE: a zero total size means the PES size is
867 if (!pes->total_size)
868 pes->total_size = MAX_PES_PAYLOAD;
870 /* allocate pes buffer */
871 pes->buffer = av_buffer_alloc(pes->total_size +
872 FF_INPUT_BUFFER_PADDING_SIZE);
874 return AVERROR(ENOMEM);
876 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
877 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
878 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
879 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
880 pes->state = MPEGTS_PESHEADER;
881 if (pes->st->codec->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
882 av_dlog(pes->stream, "pid=%x stream_type=%x probing\n",
883 pes->pid, pes->stream_type);
884 pes->st->request_probe= 1;
887 pes->state = MPEGTS_PAYLOAD;
891 /* otherwise, it should be a table */
894 pes->state = MPEGTS_SKIP;
899 /**********************************************/
900 /* PES packing parsing */
901 case MPEGTS_PESHEADER:
902 len = PES_HEADER_SIZE - pes->data_index;
907 memcpy(pes->header + pes->data_index, p, len);
908 pes->data_index += len;
911 if (pes->data_index == PES_HEADER_SIZE) {
912 pes->pes_header_size = pes->header[8] + 9;
913 pes->state = MPEGTS_PESHEADER_FILL;
916 case MPEGTS_PESHEADER_FILL:
917 len = pes->pes_header_size - pes->data_index;
922 memcpy(pes->header + pes->data_index, p, len);
923 pes->data_index += len;
926 if (pes->data_index == pes->pes_header_size) {
928 unsigned int flags, pes_ext, skip;
930 flags = pes->header[7];
932 pes->pts = AV_NOPTS_VALUE;
933 pes->dts = AV_NOPTS_VALUE;
934 if ((flags & 0xc0) == 0x80) {
935 pes->dts = pes->pts = ff_parse_pes_pts(r);
937 } else if ((flags & 0xc0) == 0xc0) {
938 pes->pts = ff_parse_pes_pts(r);
940 pes->dts = ff_parse_pes_pts(r);
943 pes->extended_stream_id = -1;
944 if (flags & 0x01) { /* PES extension */
946 /* Skip PES private data, program packet sequence counter and P-STD buffer */
947 skip = (pes_ext >> 4) & 0xb;
950 if ((pes_ext & 0x41) == 0x01 &&
951 (r + 2) <= (pes->header + pes->pes_header_size)) {
952 /* PES extension 2 */
953 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
954 pes->extended_stream_id = r[1];
958 /* we got the full header. We parse it and get the payload */
959 pes->state = MPEGTS_PAYLOAD;
961 if (pes->stream_type == 0x12 && buf_size > 0) {
962 int sl_header_bytes = read_sl_header(pes, &pes->sl, p, buf_size);
963 pes->pes_header_size += sl_header_bytes;
964 p += sl_header_bytes;
965 buf_size -= sl_header_bytes;
970 if (buf_size > 0 && pes->buffer) {
971 if (pes->data_index > 0 && pes->data_index+buf_size > pes->total_size) {
972 new_pes_packet(pes, ts->pkt);
973 pes->total_size = MAX_PES_PAYLOAD;
974 pes->buffer = av_buffer_alloc(pes->total_size + FF_INPUT_BUFFER_PADDING_SIZE);
976 return AVERROR(ENOMEM);
978 } else if (pes->data_index == 0 && buf_size > pes->total_size) {
979 // pes packet size is < ts size packet and pes data is padded with 0xff
980 // not sure if this is legal in ts but see issue #2392
981 buf_size = pes->total_size;
983 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
984 pes->data_index += buf_size;
987 /* emit complete packets with known packet size
988 * decreases demuxer delay for infrequent packets like subtitles from
989 * a couple of seconds to milliseconds for properly muxed files.
990 * total_size is the number of bytes following pes_packet_length
991 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
992 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
993 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
995 new_pes_packet(pes, ts->pkt);
1007 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1012 /* if no pid found, then add a pid context */
1013 pes = av_mallocz(sizeof(PESContext));
1017 pes->stream = ts->stream;
1019 pes->pcr_pid = pcr_pid;
1020 pes->state = MPEGTS_SKIP;
1021 pes->pts = AV_NOPTS_VALUE;
1022 pes->dts = AV_NOPTS_VALUE;
1023 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1036 Mp4Descr *active_descr;
1038 int max_descr_count;
1040 } MP4DescrParseContext;
1042 static int init_MP4DescrParseContext(
1043 MP4DescrParseContext *d, AVFormatContext *s, const uint8_t *buf,
1044 unsigned size, Mp4Descr *descr, int max_descr_count)
1048 return AVERROR_INVALIDDATA;
1050 if ((ret = ffio_init_context(&d->pb, (unsigned char*)buf, size, 0,
1051 NULL, NULL, NULL, NULL)) < 0)
1058 d->active_descr = NULL;
1059 d->max_descr_count = max_descr_count;
1064 static void update_offsets(AVIOContext *pb, int64_t *off, int *len) {
1065 int64_t new_off = avio_tell(pb);
1066 (*len) -= new_off - *off;
1070 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1073 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1076 if (parse_mp4_descr(d, off, len, 0) < 0)
1078 update_offsets(&d->pb, &off, &len);
1083 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1085 avio_rb16(&d->pb); // ID
1091 update_offsets(&d->pb, &off, &len);
1092 return parse_mp4_descr_arr(d, off, len);
1095 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1100 id_flags = avio_rb16(&d->pb);
1101 if (!(id_flags & 0x0020)) { //URL_Flag
1102 update_offsets(&d->pb, &off, &len);
1103 return parse_mp4_descr_arr(d, off, len); //ES_Descriptor[]
1109 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1112 if (d->descr_count >= d->max_descr_count)
1114 ff_mp4_parse_es_descr(&d->pb, &es_id);
1115 d->active_descr = d->descr + (d->descr_count++);
1117 d->active_descr->es_id = es_id;
1118 update_offsets(&d->pb, &off, &len);
1119 parse_mp4_descr(d, off, len, MP4DecConfigDescrTag);
1120 update_offsets(&d->pb, &off, &len);
1122 parse_mp4_descr(d, off, len, MP4SLDescrTag);
1123 d->active_descr = NULL;
1127 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1129 Mp4Descr *descr = d->active_descr;
1132 d->active_descr->dec_config_descr = av_malloc(len);
1133 if (!descr->dec_config_descr)
1134 return AVERROR(ENOMEM);
1135 descr->dec_config_descr_len = len;
1136 avio_read(&d->pb, descr->dec_config_descr, len);
1140 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1142 Mp4Descr *descr = d->active_descr;
1147 predefined = avio_r8(&d->pb);
1150 int flags = avio_r8(&d->pb);
1151 descr->sl.use_au_start = !!(flags & 0x80);
1152 descr->sl.use_au_end = !!(flags & 0x40);
1153 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1154 descr->sl.use_padding = !!(flags & 0x08);
1155 descr->sl.use_timestamps = !!(flags & 0x04);
1156 descr->sl.use_idle = !!(flags & 0x02);
1157 descr->sl.timestamp_res = avio_rb32(&d->pb);
1159 descr->sl.timestamp_len = avio_r8(&d->pb);
1160 descr->sl.ocr_len = avio_r8(&d->pb);
1161 descr->sl.au_len = avio_r8(&d->pb);
1162 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1163 lengths = avio_rb16(&d->pb);
1164 descr->sl.degr_prior_len = lengths >> 12;
1165 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1166 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1168 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1173 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1176 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1177 update_offsets(&d->pb, &off, &len);
1178 if (len < 0 || len1 > len || len1 <= 0) {
1179 av_log(d->s, AV_LOG_ERROR, "Tag %x length violation new length %d bytes remaining %d\n", tag, len1, len);
1183 if (d->level++ >= MAX_LEVEL) {
1184 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1188 if (target_tag && tag != target_tag) {
1189 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag, target_tag);
1195 parse_MP4IODescrTag(d, off, len1);
1198 parse_MP4ODescrTag(d, off, len1);
1201 parse_MP4ESDescrTag(d, off, len1);
1203 case MP4DecConfigDescrTag:
1204 parse_MP4DecConfigDescrTag(d, off, len1);
1207 parse_MP4SLDescrTag(d, off, len1);
1213 avio_seek(&d->pb, off + len1, SEEK_SET);
1217 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1218 Mp4Descr *descr, int *descr_count, int max_descr_count)
1220 MP4DescrParseContext d;
1221 if (init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count) < 0)
1224 parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1226 *descr_count = d.descr_count;
1230 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1231 Mp4Descr *descr, int *descr_count, int max_descr_count)
1233 MP4DescrParseContext d;
1234 if (init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count) < 0)
1237 parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1239 *descr_count = d.descr_count;
1243 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1245 MpegTSContext *ts = filter->u.section_filter.opaque;
1247 const uint8_t *p, *p_end;
1249 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }};
1250 int mp4_descr_count = 0;
1252 AVFormatContext *s = ts->stream;
1254 p_end = section + section_len - 4;
1256 if (parse_section_header(&h, &p, p_end) < 0)
1258 if (h.tid != M4OD_TID)
1261 mp4_read_od(s, p, (unsigned)(p_end - p), mp4_descr, &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1263 for (pid = 0; pid < NB_PID_MAX; pid++) {
1266 for (i = 0; i < mp4_descr_count; i++) {
1269 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1271 if (!(ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES)) {
1272 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1275 pes = ts->pids[pid]->u.pes_filter.opaque;
1281 pes->sl = mp4_descr[i].sl;
1283 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1284 mp4_descr[i].dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
1285 ff_mp4_read_dec_config_descr(s, st, &pb);
1286 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1287 st->codec->extradata_size > 0)
1288 st->need_parsing = 0;
1289 if (st->codec->codec_id == AV_CODEC_ID_H264 &&
1290 st->codec->extradata_size > 0)
1291 st->need_parsing = 0;
1293 if (st->codec->codec_id <= AV_CODEC_ID_NONE) {
1294 } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_AUDIO) {
1295 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1296 } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_SUBTITLE) {
1297 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1298 } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_UNKNOWN) {
1299 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1303 for (i = 0; i < mp4_descr_count; i++)
1304 av_free(mp4_descr[i].dec_config_descr);
1307 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1308 const uint8_t **pp, const uint8_t *desc_list_end,
1309 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1312 const uint8_t *desc_end;
1313 int desc_len, desc_tag, desc_es_id;
1317 desc_tag = get8(pp, desc_list_end);
1320 desc_len = get8(pp, desc_list_end);
1323 desc_end = *pp + desc_len;
1324 if (desc_end > desc_list_end)
1327 av_dlog(fc, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1329 if (st->codec->codec_id == AV_CODEC_ID_NONE &&
1330 stream_type == STREAM_TYPE_PRIVATE_DATA)
1331 mpegts_find_stream_type(st, desc_tag, DESC_types);
1334 case 0x1E: /* SL descriptor */
1335 desc_es_id = get16(pp, desc_end);
1336 if (ts && ts->pids[pid])
1337 ts->pids[pid]->es_id = desc_es_id;
1338 for (i = 0; i < mp4_descr_count; i++)
1339 if (mp4_descr[i].dec_config_descr_len &&
1340 mp4_descr[i].es_id == desc_es_id) {
1342 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1343 mp4_descr[i].dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
1344 ff_mp4_read_dec_config_descr(fc, st, &pb);
1345 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1346 st->codec->extradata_size > 0)
1347 st->need_parsing = 0;
1348 if (st->codec->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1349 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1352 case 0x1F: /* FMC descriptor */
1353 get16(pp, desc_end);
1354 if (mp4_descr_count > 0 && (st->codec->codec_id == AV_CODEC_ID_AAC_LATM || st->request_probe>0) &&
1355 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1357 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1358 mp4_descr->dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
1359 ff_mp4_read_dec_config_descr(fc, st, &pb);
1360 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1361 st->codec->extradata_size > 0){
1362 st->request_probe= st->need_parsing = 0;
1363 st->codec->codec_type= AVMEDIA_TYPE_AUDIO;
1367 case 0x56: /* DVB teletext descriptor */
1368 language[0] = get8(pp, desc_end);
1369 language[1] = get8(pp, desc_end);
1370 language[2] = get8(pp, desc_end);
1372 av_dict_set(&st->metadata, "language", language, 0);
1374 case 0x59: /* subtitling descriptor */
1375 language[0] = get8(pp, desc_end);
1376 language[1] = get8(pp, desc_end);
1377 language[2] = get8(pp, desc_end);
1379 /* hearing impaired subtitles detection */
1380 switch(get8(pp, desc_end)) {
1381 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1382 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1383 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1384 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1385 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1386 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1387 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1390 if (st->codec->extradata) {
1391 if (st->codec->extradata_size == 4 && memcmp(st->codec->extradata, *pp, 4))
1392 avpriv_request_sample(fc, "DVB sub with multiple IDs");
1394 st->codec->extradata = av_malloc(4 + FF_INPUT_BUFFER_PADDING_SIZE);
1395 if (st->codec->extradata) {
1396 st->codec->extradata_size = 4;
1397 memcpy(st->codec->extradata, *pp, 4);
1401 av_dict_set(&st->metadata, "language", language, 0);
1403 case 0x0a: /* ISO 639 language descriptor */
1404 for (i = 0; i + 4 <= desc_len; i += 4) {
1405 language[i + 0] = get8(pp, desc_end);
1406 language[i + 1] = get8(pp, desc_end);
1407 language[i + 2] = get8(pp, desc_end);
1408 language[i + 3] = ',';
1409 switch (get8(pp, desc_end)) {
1410 case 0x01: st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS; break;
1411 case 0x02: st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; break;
1412 case 0x03: st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; break;
1416 language[i - 1] = 0;
1417 av_dict_set(&st->metadata, "language", language, 0);
1420 case 0x05: /* registration descriptor */
1421 st->codec->codec_tag = bytestream_get_le32(pp);
1422 av_dlog(fc, "reg_desc=%.4s\n", (char*)&st->codec->codec_tag);
1423 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1424 mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
1426 case 0x52: /* stream identifier descriptor */
1427 st->stream_identifier = 1 + get8(pp, desc_end);
1436 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1438 MpegTSContext *ts = filter->u.section_filter.opaque;
1439 SectionHeader h1, *h = &h1;
1442 const uint8_t *p, *p_end, *desc_list_end;
1443 int program_info_length, pcr_pid, pid, stream_type;
1445 uint32_t prog_reg_desc = 0; /* registration descriptor */
1447 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }};
1448 int mp4_descr_count = 0;
1451 av_dlog(ts->stream, "PMT: len %i\n", section_len);
1452 hex_dump_debug(ts->stream, section, section_len);
1454 p_end = section + section_len - 4;
1456 if (parse_section_header(h, &p, p_end) < 0)
1459 av_dlog(ts->stream, "sid=0x%x sec_num=%d/%d\n",
1460 h->id, h->sec_num, h->last_sec_num);
1462 if (h->tid != PMT_TID)
1465 clear_program(ts, h->id);
1466 pcr_pid = get16(&p, p_end);
1470 add_pid_to_pmt(ts, h->id, pcr_pid);
1471 set_pcr_pid(ts->stream, h->id, pcr_pid);
1473 av_dlog(ts->stream, "pcr_pid=0x%x\n", pcr_pid);
1475 program_info_length = get16(&p, p_end);
1476 if (program_info_length < 0)
1478 program_info_length &= 0xfff;
1479 while(program_info_length >= 2) {
1481 tag = get8(&p, p_end);
1482 len = get8(&p, p_end);
1484 av_dlog(ts->stream, "program tag: 0x%02x len=%d\n", tag, len);
1486 if(len > program_info_length - 2)
1487 //something else is broken, exit the program_descriptors_loop
1489 program_info_length -= len + 2;
1490 if (tag == 0x1d) { // IOD descriptor
1491 get8(&p, p_end); // scope
1492 get8(&p, p_end); // label
1494 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
1495 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1496 } else if (tag == 0x05 && len >= 4) { // registration descriptor
1497 prog_reg_desc = bytestream_get_le32(&p);
1502 p += program_info_length;
1506 // stop parsing after pmt, we found header
1507 if (!ts->stream->nb_streams)
1513 stream_type = get8(&p, p_end);
1514 if (stream_type < 0)
1516 pid = get16(&p, p_end);
1520 if (pid == ts->current_pid)
1523 /* now create stream */
1524 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
1525 pes = ts->pids[pid]->u.pes_filter.opaque;
1527 pes->st = avformat_new_stream(pes->stream, NULL);
1530 pes->st->id = pes->pid;
1533 } else if (stream_type != 0x13) {
1534 if (ts->pids[pid]) mpegts_close_filter(ts, ts->pids[pid]); //wrongly added sdt filter probably
1535 pes = add_pes_stream(ts, pid, pcr_pid);
1537 st = avformat_new_stream(pes->stream, NULL);
1543 int idx = ff_find_stream_index(ts->stream, pid);
1545 st = ts->stream->streams[idx];
1547 st = avformat_new_stream(ts->stream, NULL);
1551 st->codec->codec_type = AVMEDIA_TYPE_DATA;
1558 if (pes && !pes->stream_type)
1559 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
1561 add_pid_to_pmt(ts, h->id, pid);
1563 ff_program_add_stream_index(ts->stream, h->id, st->index);
1565 desc_list_len = get16(&p, p_end);
1566 if (desc_list_len < 0)
1568 desc_list_len &= 0xfff;
1569 desc_list_end = p + desc_list_len;
1570 if (desc_list_end > p_end)
1573 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p, desc_list_end,
1574 mp4_descr, mp4_descr_count, pid, ts) < 0)
1577 if (pes && prog_reg_desc == AV_RL32("HDMV") && stream_type == 0x83 && pes->sub_st) {
1578 ff_program_add_stream_index(ts->stream, h->id, pes->sub_st->index);
1579 pes->sub_st->codec->codec_tag = st->codec->codec_tag;
1586 for (i = 0; i < mp4_descr_count; i++)
1587 av_free(mp4_descr[i].dec_config_descr);
1590 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1592 MpegTSContext *ts = filter->u.section_filter.opaque;
1593 SectionHeader h1, *h = &h1;
1594 const uint8_t *p, *p_end;
1598 av_dlog(ts->stream, "PAT:\n");
1599 hex_dump_debug(ts->stream, section, section_len);
1601 p_end = section + section_len - 4;
1603 if (parse_section_header(h, &p, p_end) < 0)
1605 if (h->tid != PAT_TID)
1608 ts->stream->ts_id = h->id;
1612 sid = get16(&p, p_end);
1615 pmt_pid = get16(&p, p_end);
1620 if (pmt_pid == ts->current_pid)
1623 av_dlog(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
1625 if (sid == 0x0000) {
1628 program = av_new_program(ts->stream, sid);
1629 program->program_num = sid;
1630 program->pmt_pid = pmt_pid;
1631 if (ts->pids[pmt_pid])
1632 mpegts_close_filter(ts, ts->pids[pmt_pid]);
1633 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
1634 add_pat_entry(ts, sid);
1635 add_pid_to_pmt(ts, sid, 0); //add pat pid to program
1636 add_pid_to_pmt(ts, sid, pmt_pid);
1642 for (j=0; j<ts->stream->nb_programs; j++) {
1643 for (i=0; i<ts->nb_prg; i++)
1644 if (ts->prg[i].id == ts->stream->programs[j]->id)
1647 clear_avprogram(ts, ts->stream->programs[j]->id);
1652 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1654 MpegTSContext *ts = filter->u.section_filter.opaque;
1655 SectionHeader h1, *h = &h1;
1656 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
1657 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
1658 char *name, *provider_name;
1660 av_dlog(ts->stream, "SDT:\n");
1661 hex_dump_debug(ts->stream, section, section_len);
1663 p_end = section + section_len - 4;
1665 if (parse_section_header(h, &p, p_end) < 0)
1667 if (h->tid != SDT_TID)
1669 onid = get16(&p, p_end);
1672 val = get8(&p, p_end);
1676 sid = get16(&p, p_end);
1679 val = get8(&p, p_end);
1682 desc_list_len = get16(&p, p_end);
1683 if (desc_list_len < 0)
1685 desc_list_len &= 0xfff;
1686 desc_list_end = p + desc_list_len;
1687 if (desc_list_end > p_end)
1690 desc_tag = get8(&p, desc_list_end);
1693 desc_len = get8(&p, desc_list_end);
1694 desc_end = p + desc_len;
1695 if (desc_end > desc_list_end)
1698 av_dlog(ts->stream, "tag: 0x%02x len=%d\n",
1699 desc_tag, desc_len);
1703 service_type = get8(&p, p_end);
1704 if (service_type < 0)
1706 provider_name = getstr8(&p, p_end);
1709 name = getstr8(&p, p_end);
1711 AVProgram *program = av_new_program(ts->stream, sid);
1713 av_dict_set(&program->metadata, "service_name", name, 0);
1714 av_dict_set(&program->metadata, "service_provider", provider_name, 0);
1718 av_free(provider_name);
1729 /* handle one TS packet */
1730 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
1732 AVFormatContext *s = ts->stream;
1734 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
1735 has_adaptation, has_payload;
1736 const uint8_t *p, *p_end;
1739 pid = AV_RB16(packet + 1) & 0x1fff;
1740 if(pid && discard_pid(ts, pid))
1742 is_start = packet[1] & 0x40;
1743 tss = ts->pids[pid];
1744 if (ts->auto_guess && tss == NULL && is_start) {
1745 add_pes_stream(ts, pid, -1);
1746 tss = ts->pids[pid];
1750 ts->current_pid = pid;
1752 afc = (packet[3] >> 4) & 3;
1753 if (afc == 0) /* reserved value */
1755 has_adaptation = afc & 2;
1756 has_payload = afc & 1;
1757 is_discontinuity = has_adaptation
1758 && packet[4] != 0 /* with length > 0 */
1759 && (packet[5] & 0x80); /* and discontinuity indicated */
1761 /* continuity check (currently not used) */
1762 cc = (packet[3] & 0xf);
1763 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
1764 cc_ok = pid == 0x1FFF // null packet PID
1767 || expected_cc == cc;
1771 av_log(ts->stream, AV_LOG_DEBUG,
1772 "Continuity check failed for pid %d expected %d got %d\n",
1773 pid, expected_cc, cc);
1774 if(tss->type == MPEGTS_PES) {
1775 PESContext *pc = tss->u.pes_filter.opaque;
1776 pc->flags |= AV_PKT_FLAG_CORRUPT;
1783 if (has_adaptation) {
1784 /* skip adaptation field */
1787 /* if past the end of packet, ignore */
1788 p_end = packet + TS_PACKET_SIZE;
1792 pos = avio_tell(ts->stream->pb);
1793 ts->pos47= pos % ts->raw_packet_size;
1795 if (tss->type == MPEGTS_SECTION) {
1797 /* pointer field present */
1799 if (p + len > p_end)
1802 /* write remaining section bytes */
1803 write_section_data(s, tss,
1805 /* check whether filter has been closed */
1811 write_section_data(s, tss,
1816 write_section_data(s, tss,
1822 // Note: The position here points actually behind the current packet.
1823 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
1824 pos - ts->raw_packet_size)) < 0)
1831 /* XXX: try to find a better synchro over several packets (use
1832 get_packet_size() ?) */
1833 static int mpegts_resync(AVFormatContext *s)
1835 AVIOContext *pb = s->pb;
1838 for(i = 0;i < MAX_RESYNC_SIZE; i++) {
1843 avio_seek(pb, -1, SEEK_CUR);
1847 av_log(s, AV_LOG_ERROR, "max resync size reached, could not find sync byte\n");
1852 /* return -1 if error or EOF. Return 0 if OK. */
1853 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size)
1855 AVIOContext *pb = s->pb;
1859 len = avio_read(pb, buf, TS_PACKET_SIZE);
1860 if (len != TS_PACKET_SIZE)
1861 return len < 0 ? len : AVERROR_EOF;
1862 /* check packet sync byte */
1863 if (buf[0] != 0x47) {
1864 /* find a new packet start */
1865 avio_seek(pb, -TS_PACKET_SIZE, SEEK_CUR);
1866 if (mpegts_resync(s) < 0)
1867 return AVERROR(EAGAIN);
1871 skip = raw_packet_size - TS_PACKET_SIZE;
1873 avio_skip(pb, skip);
1880 static int handle_packets(MpegTSContext *ts, int nb_packets)
1882 AVFormatContext *s = ts->stream;
1883 uint8_t packet[TS_PACKET_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
1884 int packet_num, ret = 0;
1886 if (avio_tell(s->pb) != ts->last_pos) {
1888 av_dlog(ts->stream, "Skipping after seek\n");
1889 /* seek detected, flush pes buffer */
1890 for (i = 0; i < NB_PID_MAX; i++) {
1892 if (ts->pids[i]->type == MPEGTS_PES) {
1893 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
1894 av_buffer_unref(&pes->buffer);
1895 pes->data_index = 0;
1896 pes->state = MPEGTS_SKIP; /* skip until pes header */
1898 ts->pids[i]->last_cc = -1;
1905 memset(packet + TS_PACKET_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1908 if (nb_packets != 0 && packet_num >= nb_packets ||
1909 ts->stop_parse > 1) {
1910 ret = AVERROR(EAGAIN);
1913 if (ts->stop_parse > 0)
1916 ret = read_packet(s, packet, ts->raw_packet_size);
1919 ret = handle_packet(ts, packet);
1923 ts->last_pos = avio_tell(s->pb);
1927 static int mpegts_probe(AVProbeData *p)
1929 const int size= p->buf_size;
1933 int check_count= size / TS_FEC_PACKET_SIZE;
1934 #define CHECK_COUNT 10
1935 #define CHECK_BLOCK 100
1937 if (check_count < CHECK_COUNT)
1940 for (i=0; i<check_count; i+=CHECK_BLOCK){
1941 int left = FFMIN(check_count - i, CHECK_BLOCK);
1942 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , NULL);
1943 int dvhs_score= analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, NULL);
1944 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , NULL);
1945 score = FFMAX3(score, dvhs_score, fec_score);
1947 maxscore = FFMAX(maxscore, score);
1950 sumscore = sumscore*CHECK_COUNT/check_count;
1951 maxscore = maxscore*CHECK_COUNT/CHECK_BLOCK;
1953 av_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
1955 if (sumscore > 6) return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
1956 else if (maxscore > 6) return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
1960 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
1961 (-1) if not available */
1962 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
1963 const uint8_t *packet)
1965 int afc, len, flags;
1969 afc = (packet[3] >> 4) & 3;
1979 if (!(flags & 0x10))
1984 *ppcr_high = ((int64_t)v << 1) | (p[4] >> 7);
1985 *ppcr_low = ((p[4] & 1) << 8) | p[5];
1989 static int mpegts_read_header(AVFormatContext *s)
1991 MpegTSContext *ts = s->priv_data;
1992 AVIOContext *pb = s->pb;
1993 uint8_t buf[8*1024]={0};
1997 /* read the first 8192 bytes to get packet size */
1998 pos = avio_tell(pb);
1999 len = avio_read(pb, buf, sizeof(buf));
2000 ts->raw_packet_size = get_packet_size(buf, len);
2001 if (ts->raw_packet_size <= 0) {
2002 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2003 ts->raw_packet_size = TS_PACKET_SIZE;
2008 if (s->iformat == &ff_mpegts_demuxer) {
2011 /* first do a scan to get all the services */
2012 /* NOTE: We attempt to seek on non-seekable files as well, as the
2013 * probe buffer usually is big enough. Only warn if the seek failed
2014 * on files where the seek should work. */
2015 if (avio_seek(pb, pos, SEEK_SET) < 0)
2016 av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2018 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2020 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2022 handle_packets(ts, s->probesize / ts->raw_packet_size);
2023 /* if could not find service, enable auto_guess */
2027 av_dlog(ts->stream, "tuning done\n");
2029 s->ctx_flags |= AVFMTCTX_NOHEADER;
2032 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2033 int64_t pcrs[2], pcr_h;
2034 int packet_count[2];
2035 uint8_t packet[TS_PACKET_SIZE];
2037 /* only read packets */
2039 st = avformat_new_stream(s, NULL);
2042 avpriv_set_pts_info(st, 60, 1, 27000000);
2043 st->codec->codec_type = AVMEDIA_TYPE_DATA;
2044 st->codec->codec_id = AV_CODEC_ID_MPEG2TS;
2046 /* we iterate until we find two PCRs to estimate the bitrate */
2051 ret = read_packet(s, packet, ts->raw_packet_size);
2054 pid = AV_RB16(packet + 1) & 0x1fff;
2055 if ((pcr_pid == -1 || pcr_pid == pid) &&
2056 parse_pcr(&pcr_h, &pcr_l, packet) == 0) {
2058 packet_count[nb_pcrs] = nb_packets;
2059 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2067 /* NOTE1: the bitrate is computed without the FEC */
2068 /* NOTE2: it is only the bitrate of the start of the stream */
2069 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2070 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2071 s->bit_rate = (TS_PACKET_SIZE * 8) * 27e6 / ts->pcr_incr;
2072 st->codec->bit_rate = s->bit_rate;
2073 st->start_time = ts->cur_pcr;
2074 av_dlog(ts->stream, "start=%0.3f pcr=%0.3f incr=%d\n",
2075 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2078 avio_seek(pb, pos, SEEK_SET);
2084 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2086 static int mpegts_raw_read_packet(AVFormatContext *s,
2089 MpegTSContext *ts = s->priv_data;
2091 int64_t pcr_h, next_pcr_h, pos;
2092 int pcr_l, next_pcr_l;
2093 uint8_t pcr_buf[12];
2095 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2096 return AVERROR(ENOMEM);
2097 pkt->pos= avio_tell(s->pb);
2098 ret = read_packet(s, pkt->data, ts->raw_packet_size);
2100 av_free_packet(pkt);
2103 if (ts->mpeg2ts_compute_pcr) {
2104 /* compute exact PCR for each packet */
2105 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2106 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2107 pos = avio_tell(s->pb);
2108 for(i = 0; i < MAX_PACKET_READAHEAD; i++) {
2109 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2110 avio_read(s->pb, pcr_buf, 12);
2111 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2112 /* XXX: not precise enough */
2113 ts->pcr_incr = ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2118 avio_seek(s->pb, pos, SEEK_SET);
2119 /* no next PCR found: we use previous increment */
2120 ts->cur_pcr = pcr_h * 300 + pcr_l;
2122 pkt->pts = ts->cur_pcr;
2123 pkt->duration = ts->pcr_incr;
2124 ts->cur_pcr += ts->pcr_incr;
2126 pkt->stream_index = 0;
2130 static int mpegts_read_packet(AVFormatContext *s,
2133 MpegTSContext *ts = s->priv_data;
2138 ret = handle_packets(ts, 0);
2140 av_free_packet(ts->pkt);
2141 /* flush pes data left */
2142 for (i = 0; i < NB_PID_MAX; i++) {
2143 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2144 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2145 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2146 new_pes_packet(pes, pkt);
2147 pes->state = MPEGTS_SKIP;
2155 if (!ret && pkt->size < 0)
2156 ret = AVERROR(EINTR);
2160 static void mpegts_free(MpegTSContext *ts)
2166 for(i=0;i<NB_PID_MAX;i++)
2167 if (ts->pids[i]) mpegts_close_filter(ts, ts->pids[i]);
2170 static int mpegts_read_close(AVFormatContext *s)
2172 MpegTSContext *ts = s->priv_data;
2177 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2178 int64_t *ppos, int64_t pos_limit)
2180 MpegTSContext *ts = s->priv_data;
2181 int64_t pos, timestamp;
2182 uint8_t buf[TS_PACKET_SIZE];
2183 int pcr_l, pcr_pid = ((PESContext*)s->streams[stream_index]->priv_data)->pcr_pid;
2184 pos = ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->pos47;
2185 while(pos < pos_limit) {
2186 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2187 return AV_NOPTS_VALUE;
2188 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2189 return AV_NOPTS_VALUE;
2190 if (buf[0] != 0x47) {
2191 if (mpegts_resync(s) < 0)
2192 return AV_NOPTS_VALUE;
2193 pos = avio_tell(s->pb);
2196 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2197 parse_pcr(×tamp, &pcr_l, buf) == 0) {
2201 pos += ts->raw_packet_size;
2204 return AV_NOPTS_VALUE;
2207 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2208 int64_t *ppos, int64_t pos_limit)
2210 MpegTSContext *ts = s->priv_data;
2212 pos = ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->pos47;
2213 ff_read_frame_flush(s);
2214 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2215 return AV_NOPTS_VALUE;
2216 while(pos < pos_limit) {
2219 av_init_packet(&pkt);
2220 ret= av_read_frame(s, &pkt);
2222 return AV_NOPTS_VALUE;
2223 av_free_packet(&pkt);
2224 if(pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0){
2225 ff_reduce_index(s, pkt.stream_index);
2226 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
2227 if(pkt.stream_index == stream_index){
2235 return AV_NOPTS_VALUE;
2238 /**************************************************************/
2239 /* parsing functions - called from other demuxers such as RTP */
2241 MpegTSContext *ff_mpegts_parse_open(AVFormatContext *s)
2245 ts = av_mallocz(sizeof(MpegTSContext));
2248 /* no stream case, currently used by RTP */
2249 ts->raw_packet_size = TS_PACKET_SIZE;
2252 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2253 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2258 /* return the consumed length if a packet was output, or -1 if no
2260 int ff_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
2261 const uint8_t *buf, int len)
2269 if (len < TS_PACKET_SIZE)
2271 if (buf[0] != 0x47) {
2275 handle_packet(ts, buf);
2276 buf += TS_PACKET_SIZE;
2277 len -= TS_PACKET_SIZE;
2278 if (ts->stop_parse == 1)
2285 void ff_mpegts_parse_close(MpegTSContext *ts)
2291 AVInputFormat ff_mpegts_demuxer = {
2293 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2294 .priv_data_size = sizeof(MpegTSContext),
2295 .read_probe = mpegts_probe,
2296 .read_header = mpegts_read_header,
2297 .read_packet = mpegts_read_packet,
2298 .read_close = mpegts_read_close,
2299 .read_timestamp = mpegts_get_dts,
2300 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2303 AVInputFormat ff_mpegtsraw_demuxer = {
2304 .name = "mpegtsraw",
2305 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
2306 .priv_data_size = sizeof(MpegTSContext),
2307 .read_header = mpegts_read_header,
2308 .read_packet = mpegts_raw_read_packet,
2309 .read_close = mpegts_read_close,
2310 .read_timestamp = mpegts_get_dts,
2311 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2312 .priv_class = &mpegtsraw_class,