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/crc.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/log.h"
25 #include "libavutil/dict.h"
26 #include "libavutil/mathematics.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/avassert.h"
29 #include "libavcodec/bytestream.h"
30 #include "libavcodec/get_bits.h"
34 #include "avio_internal.h"
39 /* maximum size in which we look for synchronisation if
40 synchronisation is lost */
41 #define MAX_RESYNC_SIZE 65536
43 #define MAX_PES_PAYLOAD 200*1024
45 #define MAX_MP4_DESCR_COUNT 16
47 enum MpegTSFilterType {
52 typedef struct MpegTSFilter MpegTSFilter;
54 typedef int PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos);
56 typedef struct MpegTSPESFilter {
61 typedef void SectionCallback(MpegTSFilter *f, const uint8_t *buf, int len);
63 typedef void SetServiceCallback(void *opaque, int ret);
65 typedef struct MpegTSSectionFilter {
69 unsigned int check_crc:1;
70 unsigned int end_of_section_reached:1;
71 SectionCallback *section_cb;
73 } MpegTSSectionFilter;
78 int last_cc; /* last cc code (-1 if first packet) */
79 enum MpegTSFilterType type;
81 MpegTSPESFilter pes_filter;
82 MpegTSSectionFilter section_filter;
86 #define MAX_PIDS_PER_PROGRAM 64
88 unsigned int id; //program id/service id
90 unsigned int pids[MAX_PIDS_PER_PROGRAM];
93 struct MpegTSContext {
96 AVFormatContext *stream;
97 /** raw packet size, including FEC if present */
102 /** if true, all pids are analyzed to find streams */
105 /** compute exact PCR for each transport stream packet */
106 int mpeg2ts_compute_pcr;
108 int64_t cur_pcr; /**< used to estimate the exact PCR */
109 int pcr_incr; /**< used to estimate the exact PCR */
111 /* data needed to handle file based ts */
112 /** stop parsing loop */
114 /** packet containing Audio/Video data */
116 /** to detect seek */
119 /******************************************/
120 /* private mpegts data */
122 /** structure to keep track of Program->pids mapping */
126 int8_t crc_validity[NB_PID_MAX];
128 /** filters for various streams specified by PMT + for the PAT and PMT */
129 MpegTSFilter *pids[NB_PID_MAX];
133 static const AVOption options[] = {
134 {"compute_pcr", "Compute exact PCR for each transport stream packet.", offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT,
135 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
139 static const AVClass mpegtsraw_class = {
140 .class_name = "mpegtsraw demuxer",
141 .item_name = av_default_item_name,
143 .version = LIBAVUTIL_VERSION_INT,
146 /* TS stream handling */
151 MPEGTS_PESHEADER_FILL,
156 /* enough for PES header + length */
157 #define PES_START_SIZE 6
158 #define PES_HEADER_SIZE 9
159 #define MAX_PES_HEADER_SIZE (9 + 255)
161 typedef struct PESContext {
163 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
166 AVFormatContext *stream;
168 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
169 enum MpegTSState state;
170 /* used to get the format */
172 int flags; /**< copied to the AVPacket flags */
175 int extended_stream_id;
177 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
178 uint8_t header[MAX_PES_HEADER_SIZE];
183 extern AVInputFormat ff_mpegts_demuxer;
185 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
187 AVProgram *prg = NULL;
189 for(i=0; i<ts->stream->nb_programs; i++)
190 if(ts->stream->programs[i]->id == programid){
191 prg = ts->stream->programs[i];
196 prg->nb_stream_indexes = 0;
199 static void clear_program(MpegTSContext *ts, unsigned int programid)
203 clear_avprogram(ts, programid);
204 for(i=0; i<ts->nb_prg; i++)
205 if(ts->prg[i].id == programid)
206 ts->prg[i].nb_pids = 0;
209 static void clear_programs(MpegTSContext *ts)
212 for(i=0; i<ts->nb_prg; i++)
213 clear_avprogram(ts, ts->prg[i].id);
218 static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
221 void *tmp = av_realloc(ts->prg, (ts->nb_prg+1)*sizeof(struct Program));
225 p = &ts->prg[ts->nb_prg];
231 static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned int pid)
234 struct Program *p = NULL;
235 for(i=0; i<ts->nb_prg; i++) {
236 if(ts->prg[i].id == programid) {
244 if(p->nb_pids >= MAX_PIDS_PER_PROGRAM)
246 p->pids[p->nb_pids++] = pid;
249 static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
252 for(i=0; i<s->nb_programs; i++) {
253 if(s->programs[i]->id == programid) {
254 s->programs[i]->pcr_pid = pid;
261 * @brief discard_pid() decides if the pid is to be discarded according
262 * to caller's programs selection
263 * @param ts : - TS context
265 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
268 static int discard_pid(MpegTSContext *ts, unsigned int pid)
271 int used = 0, discarded = 0;
273 for(i=0; i<ts->nb_prg; i++) {
275 for(j=0; j<p->nb_pids; j++) {
276 if(p->pids[j] != pid)
278 //is program with id p->id set to be discarded?
279 for(k=0; k<ts->stream->nb_programs; k++) {
280 if(ts->stream->programs[k]->id == p->id) {
281 if(ts->stream->programs[k]->discard == AVDISCARD_ALL)
290 return !used && discarded;
294 * Assemble PES packets out of TS packets, and then call the "section_cb"
295 * function when they are complete.
297 static void write_section_data(AVFormatContext *s, MpegTSFilter *tss1,
298 const uint8_t *buf, int buf_size, int is_start)
300 MpegTSContext *ts = s->priv_data;
301 MpegTSSectionFilter *tss = &tss1->u.section_filter;
305 memcpy(tss->section_buf, buf, buf_size);
306 tss->section_index = buf_size;
307 tss->section_h_size = -1;
308 tss->end_of_section_reached = 0;
310 if (tss->end_of_section_reached)
312 len = 4096 - tss->section_index;
315 memcpy(tss->section_buf + tss->section_index, buf, len);
316 tss->section_index += len;
319 /* compute section length if possible */
320 if (tss->section_h_size == -1 && tss->section_index >= 3) {
321 len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
324 tss->section_h_size = len;
327 if (tss->section_h_size != -1 && tss->section_index >= tss->section_h_size) {
329 tss->end_of_section_reached = 1;
332 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, tss->section_buf, tss->section_h_size);
334 ts->crc_validity[ tss1->pid ] = 100;
335 }else if(ts->crc_validity[ tss1->pid ] > -10){
336 ts->crc_validity[ tss1->pid ]--;
341 tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
345 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid,
346 SectionCallback *section_cb, void *opaque,
350 MpegTSFilter *filter;
351 MpegTSSectionFilter *sec;
353 av_dlog(ts->stream, "Filter: pid=0x%x\n", pid);
355 if (pid >= NB_PID_MAX || ts->pids[pid])
357 filter = av_mallocz(sizeof(MpegTSFilter));
360 ts->pids[pid] = filter;
361 filter->type = MPEGTS_SECTION;
364 filter->last_cc = -1;
365 sec = &filter->u.section_filter;
366 sec->section_cb = section_cb;
367 sec->opaque = opaque;
368 sec->section_buf = av_malloc(MAX_SECTION_SIZE);
369 sec->check_crc = check_crc;
370 if (!sec->section_buf) {
377 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
381 MpegTSFilter *filter;
382 MpegTSPESFilter *pes;
384 if (pid >= NB_PID_MAX || ts->pids[pid])
386 filter = av_mallocz(sizeof(MpegTSFilter));
389 ts->pids[pid] = filter;
390 filter->type = MPEGTS_PES;
393 filter->last_cc = -1;
394 pes = &filter->u.pes_filter;
395 pes->pes_cb = pes_cb;
396 pes->opaque = opaque;
400 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
405 if (filter->type == MPEGTS_SECTION)
406 av_freep(&filter->u.section_filter.section_buf);
407 else if (filter->type == MPEGTS_PES) {
408 PESContext *pes = filter->u.pes_filter.opaque;
409 av_freep(&pes->buffer);
410 /* referenced private data will be freed later in
411 * avformat_close_input */
412 if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
413 av_freep(&filter->u.pes_filter.opaque);
418 ts->pids[pid] = NULL;
421 static int analyze(const uint8_t *buf, int size, int packet_size, int *index){
422 int stat[TS_MAX_PACKET_SIZE];
427 memset(stat, 0, packet_size*sizeof(int));
429 for(x=i=0; i<size-3; i++){
430 if(buf[i] == 0x47 && !(buf[i+1] & 0x80) && buf[i+3] != 0x47){
432 if(stat[x] > best_score){
439 if(x == packet_size) x= 0;
445 /* autodetect fec presence. Must have at least 1024 bytes */
446 static int get_packet_size(const uint8_t *buf, int size)
448 int score, fec_score, dvhs_score;
450 if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
453 score = analyze(buf, size, TS_PACKET_SIZE, NULL);
454 dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL);
455 fec_score= analyze(buf, size, TS_FEC_PACKET_SIZE, NULL);
456 av_dlog(NULL, "score: %d, dvhs_score: %d, fec_score: %d \n",
457 score, dvhs_score, fec_score);
459 if (score > fec_score && score > dvhs_score) return TS_PACKET_SIZE;
460 else if(dvhs_score > score && dvhs_score > fec_score) return TS_DVHS_PACKET_SIZE;
461 else if(score < fec_score && dvhs_score < fec_score) return TS_FEC_PACKET_SIZE;
465 typedef struct SectionHeader {
470 uint8_t last_sec_num;
473 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
486 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
492 if ((p + 1) >= p_end)
500 /* read and allocate a DVB string preceded by its length */
501 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
508 len = get8(&p, p_end);
511 if ((p + len) > p_end)
513 str = av_malloc(len + 1);
523 static int parse_section_header(SectionHeader *h,
524 const uint8_t **pp, const uint8_t *p_end)
528 val = get8(pp, p_end);
533 val = get16(pp, p_end);
537 val = get8(pp, p_end);
540 h->version = (val >> 1) & 0x1f;
541 val = get8(pp, p_end);
545 val = get8(pp, p_end);
548 h->last_sec_num = val;
553 uint32_t stream_type;
554 enum AVMediaType codec_type;
555 enum AVCodecID codec_id;
558 static const StreamType ISO_types[] = {
559 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
560 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
561 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
562 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
563 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
564 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
565 /* Makito encoder sets stream type 0x11 for AAC,
566 * so auto-detect LOAS/LATM instead of hardcoding it. */
567 // { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
568 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
569 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
570 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
574 static const StreamType HDMV_types[] = {
575 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
576 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
577 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
578 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
579 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
580 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
581 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
582 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
583 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
584 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
589 static const StreamType MISC_types[] = {
590 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
591 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
595 static const StreamType REGD_types[] = {
596 { MKTAG('d','r','a','c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
597 { MKTAG('A','C','-','3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
598 { MKTAG('B','S','S','D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
599 { MKTAG('D','T','S','1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
600 { MKTAG('D','T','S','2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
601 { MKTAG('D','T','S','3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
602 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
603 { MKTAG('V','C','-','1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
607 /* descriptor present */
608 static const StreamType DESC_types[] = {
609 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
610 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
611 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
612 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
613 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
617 static void mpegts_find_stream_type(AVStream *st,
618 uint32_t stream_type, const StreamType *types)
620 if (avcodec_is_open(st->codec)) {
621 av_log(NULL, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
625 for (; types->stream_type; types++) {
626 if (stream_type == types->stream_type) {
627 st->codec->codec_type = types->codec_type;
628 st->codec->codec_id = types->codec_id;
629 st->request_probe = 0;
635 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
636 uint32_t stream_type, uint32_t prog_reg_desc)
638 int old_codec_type= st->codec->codec_type;
639 int old_codec_id = st->codec->codec_id;
641 if (avcodec_is_open(st->codec)) {
642 av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, codec is open\n");
646 avpriv_set_pts_info(st, 33, 1, 90000);
648 st->codec->codec_type = AVMEDIA_TYPE_DATA;
649 st->codec->codec_id = AV_CODEC_ID_NONE;
650 st->need_parsing = AVSTREAM_PARSE_FULL;
652 pes->stream_type = stream_type;
654 av_log(pes->stream, AV_LOG_DEBUG,
655 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
656 st->index, pes->stream_type, pes->pid, (char*)&prog_reg_desc);
658 st->codec->codec_tag = pes->stream_type;
660 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
661 if ((prog_reg_desc == AV_RL32("HDMV") ||
662 prog_reg_desc == AV_RL32("HDPR")) &&
663 st->codec->codec_id == AV_CODEC_ID_NONE) {
664 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
665 if (pes->stream_type == 0x83) {
666 // HDMV TrueHD streams also contain an AC3 coded version of the
667 // audio track - add a second stream for this
669 // priv_data cannot be shared between streams
670 PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
672 return AVERROR(ENOMEM);
673 memcpy(sub_pes, pes, sizeof(*sub_pes));
675 sub_st = avformat_new_stream(pes->stream, NULL);
678 return AVERROR(ENOMEM);
681 sub_st->id = pes->pid;
682 avpriv_set_pts_info(sub_st, 33, 1, 90000);
683 sub_st->priv_data = sub_pes;
684 sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
685 sub_st->codec->codec_id = AV_CODEC_ID_AC3;
686 sub_st->need_parsing = AVSTREAM_PARSE_FULL;
687 sub_pes->sub_st = pes->sub_st = sub_st;
690 if (st->codec->codec_id == AV_CODEC_ID_NONE)
691 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
692 if (st->codec->codec_id == AV_CODEC_ID_NONE){
693 st->codec->codec_id = old_codec_id;
694 st->codec->codec_type= old_codec_type;
700 static void new_pes_packet(PESContext *pes, AVPacket *pkt)
704 pkt->destruct = av_destruct_packet;
705 pkt->data = pes->buffer;
706 pkt->size = pes->data_index;
708 if(pes->total_size != MAX_PES_PAYLOAD &&
709 pes->pes_header_size + pes->data_index != pes->total_size + PES_START_SIZE) {
710 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
711 pes->flags |= AV_PKT_FLAG_CORRUPT;
713 memset(pkt->data+pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
715 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
716 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
717 pkt->stream_index = pes->sub_st->index;
719 pkt->stream_index = pes->st->index;
722 /* store position of first TS packet of this PES packet */
723 pkt->pos = pes->ts_packet_pos;
724 pkt->flags = pes->flags;
726 /* reset pts values */
727 pes->pts = AV_NOPTS_VALUE;
728 pes->dts = AV_NOPTS_VALUE;
734 static uint64_t get_ts64(GetBitContext *gb, int bits)
736 if (get_bits_left(gb) < bits)
737 return AV_NOPTS_VALUE;
738 return get_bits64(gb, bits);
741 static int read_sl_header(PESContext *pes, SLConfigDescr *sl, const uint8_t *buf, int buf_size)
744 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
745 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
746 int dts_flag = -1, cts_flag = -1;
747 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
749 init_get_bits(&gb, buf, buf_size*8);
751 if (sl->use_au_start)
752 au_start_flag = get_bits1(&gb);
754 au_end_flag = get_bits1(&gb);
755 if (!sl->use_au_start && !sl->use_au_end)
756 au_start_flag = au_end_flag = 1;
758 ocr_flag = get_bits1(&gb);
760 idle_flag = get_bits1(&gb);
762 padding_flag = get_bits1(&gb);
764 padding_bits = get_bits(&gb, 3);
766 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
767 if (sl->packet_seq_num_len)
768 skip_bits_long(&gb, sl->packet_seq_num_len);
769 if (sl->degr_prior_len)
771 skip_bits(&gb, sl->degr_prior_len);
773 skip_bits_long(&gb, sl->ocr_len);
775 if (sl->use_rand_acc_pt)
777 if (sl->au_seq_num_len > 0)
778 skip_bits_long(&gb, sl->au_seq_num_len);
779 if (sl->use_timestamps) {
780 dts_flag = get_bits1(&gb);
781 cts_flag = get_bits1(&gb);
784 if (sl->inst_bitrate_len)
785 inst_bitrate_flag = get_bits1(&gb);
787 dts = get_ts64(&gb, sl->timestamp_len);
789 cts = get_ts64(&gb, sl->timestamp_len);
791 skip_bits_long(&gb, sl->au_len);
792 if (inst_bitrate_flag)
793 skip_bits_long(&gb, sl->inst_bitrate_len);
796 if (dts != AV_NOPTS_VALUE)
798 if (cts != AV_NOPTS_VALUE)
801 if (sl->timestamp_len && sl->timestamp_res)
802 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
804 return (get_bits_count(&gb) + 7) >> 3;
807 /* return non zero if a packet could be constructed */
808 static int mpegts_push_data(MpegTSFilter *filter,
809 const uint8_t *buf, int buf_size, int is_start,
812 PESContext *pes = filter->u.pes_filter.opaque;
813 MpegTSContext *ts = pes->ts;
821 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
822 new_pes_packet(pes, ts->pkt);
825 pes->state = MPEGTS_HEADER;
827 pes->ts_packet_pos = pos;
830 while (buf_size > 0) {
833 len = PES_START_SIZE - pes->data_index;
836 memcpy(pes->header + pes->data_index, p, len);
837 pes->data_index += len;
840 if (pes->data_index == PES_START_SIZE) {
841 /* we got all the PES or section header. We can now
843 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
844 pes->header[2] == 0x01) {
845 /* it must be an mpeg2 PES stream */
846 code = pes->header[3] | 0x100;
847 av_dlog(pes->stream, "pid=%x pes_code=%#x\n", pes->pid, code);
849 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
850 (!pes->sub_st || pes->sub_st->discard == AVDISCARD_ALL)) ||
851 code == 0x1be) /* padding_stream */
854 /* stream not present in PMT */
856 pes->st = avformat_new_stream(ts->stream, NULL);
858 return AVERROR(ENOMEM);
859 pes->st->id = pes->pid;
860 mpegts_set_stream_info(pes->st, pes, 0, 0);
863 pes->total_size = AV_RB16(pes->header + 4);
864 /* NOTE: a zero total size means the PES size is
866 if (!pes->total_size)
867 pes->total_size = MAX_PES_PAYLOAD;
869 /* allocate pes buffer */
870 pes->buffer = av_malloc(pes->total_size+FF_INPUT_BUFFER_PADDING_SIZE);
872 return AVERROR(ENOMEM);
874 if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
875 code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
876 code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
877 code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
878 pes->state = MPEGTS_PESHEADER;
879 if (pes->st->codec->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
880 av_dlog(pes->stream, "pid=%x stream_type=%x probing\n",
881 pes->pid, pes->stream_type);
882 pes->st->request_probe= 1;
885 pes->state = MPEGTS_PAYLOAD;
889 /* otherwise, it should be a table */
892 pes->state = MPEGTS_SKIP;
897 /**********************************************/
898 /* PES packing parsing */
899 case MPEGTS_PESHEADER:
900 len = PES_HEADER_SIZE - pes->data_index;
905 memcpy(pes->header + pes->data_index, p, len);
906 pes->data_index += len;
909 if (pes->data_index == PES_HEADER_SIZE) {
910 pes->pes_header_size = pes->header[8] + 9;
911 pes->state = MPEGTS_PESHEADER_FILL;
914 case MPEGTS_PESHEADER_FILL:
915 len = pes->pes_header_size - pes->data_index;
920 memcpy(pes->header + pes->data_index, p, len);
921 pes->data_index += len;
924 if (pes->data_index == pes->pes_header_size) {
926 unsigned int flags, pes_ext, skip;
928 flags = pes->header[7];
930 pes->pts = AV_NOPTS_VALUE;
931 pes->dts = AV_NOPTS_VALUE;
932 if ((flags & 0xc0) == 0x80) {
933 pes->dts = pes->pts = ff_parse_pes_pts(r);
935 } else if ((flags & 0xc0) == 0xc0) {
936 pes->pts = ff_parse_pes_pts(r);
938 pes->dts = ff_parse_pes_pts(r);
941 pes->extended_stream_id = -1;
942 if (flags & 0x01) { /* PES extension */
944 /* Skip PES private data, program packet sequence counter and P-STD buffer */
945 skip = (pes_ext >> 4) & 0xb;
948 if ((pes_ext & 0x41) == 0x01 &&
949 (r + 2) <= (pes->header + pes->pes_header_size)) {
950 /* PES extension 2 */
951 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
952 pes->extended_stream_id = r[1];
956 /* we got the full header. We parse it and get the payload */
957 pes->state = MPEGTS_PAYLOAD;
959 if (pes->stream_type == 0x12 && buf_size > 0) {
960 int sl_header_bytes = read_sl_header(pes, &pes->sl, p, buf_size);
961 pes->pes_header_size += sl_header_bytes;
962 p += sl_header_bytes;
963 buf_size -= sl_header_bytes;
968 if (buf_size > 0 && pes->buffer) {
969 if (pes->data_index > 0 && pes->data_index+buf_size > pes->total_size) {
970 new_pes_packet(pes, ts->pkt);
971 pes->total_size = MAX_PES_PAYLOAD;
972 pes->buffer = av_malloc(pes->total_size+FF_INPUT_BUFFER_PADDING_SIZE);
974 return AVERROR(ENOMEM);
976 } else if (pes->data_index == 0 && buf_size > pes->total_size) {
977 // pes packet size is < ts size packet and pes data is padded with 0xff
978 // not sure if this is legal in ts but see issue #2392
979 buf_size = pes->total_size;
981 memcpy(pes->buffer+pes->data_index, p, buf_size);
982 pes->data_index += buf_size;
985 /* emit complete packets with known packet size
986 * decreases demuxer delay for infrequent packets like subtitles from
987 * a couple of seconds to milliseconds for properly muxed files.
988 * total_size is the number of bytes following pes_packet_length
989 * in the pes header, i.e. not counting the first PES_START_SIZE bytes */
990 if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
991 pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
993 new_pes_packet(pes, ts->pkt);
1005 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1010 /* if no pid found, then add a pid context */
1011 pes = av_mallocz(sizeof(PESContext));
1015 pes->stream = ts->stream;
1017 pes->pcr_pid = pcr_pid;
1018 pes->state = MPEGTS_SKIP;
1019 pes->pts = AV_NOPTS_VALUE;
1020 pes->dts = AV_NOPTS_VALUE;
1021 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1034 Mp4Descr *active_descr;
1036 int max_descr_count;
1038 } MP4DescrParseContext;
1040 static int init_MP4DescrParseContext(
1041 MP4DescrParseContext *d, AVFormatContext *s, const uint8_t *buf,
1042 unsigned size, Mp4Descr *descr, int max_descr_count)
1046 return AVERROR_INVALIDDATA;
1048 if ((ret = ffio_init_context(&d->pb, (unsigned char*)buf, size, 0,
1049 NULL, NULL, NULL, NULL)) < 0)
1056 d->active_descr = NULL;
1057 d->max_descr_count = max_descr_count;
1062 static void update_offsets(AVIOContext *pb, int64_t *off, int *len) {
1063 int64_t new_off = avio_tell(pb);
1064 (*len) -= new_off - *off;
1068 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1071 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1074 if (parse_mp4_descr(d, off, len, 0) < 0)
1076 update_offsets(&d->pb, &off, &len);
1081 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1083 avio_rb16(&d->pb); // ID
1089 update_offsets(&d->pb, &off, &len);
1090 return parse_mp4_descr_arr(d, off, len);
1093 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1098 id_flags = avio_rb16(&d->pb);
1099 if (!(id_flags & 0x0020)) { //URL_Flag
1100 update_offsets(&d->pb, &off, &len);
1101 return parse_mp4_descr_arr(d, off, len); //ES_Descriptor[]
1107 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1110 if (d->descr_count >= d->max_descr_count)
1112 ff_mp4_parse_es_descr(&d->pb, &es_id);
1113 d->active_descr = d->descr + (d->descr_count++);
1115 d->active_descr->es_id = es_id;
1116 update_offsets(&d->pb, &off, &len);
1117 parse_mp4_descr(d, off, len, MP4DecConfigDescrTag);
1118 update_offsets(&d->pb, &off, &len);
1120 parse_mp4_descr(d, off, len, MP4SLDescrTag);
1121 d->active_descr = NULL;
1125 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1127 Mp4Descr *descr = d->active_descr;
1130 d->active_descr->dec_config_descr = av_malloc(len);
1131 if (!descr->dec_config_descr)
1132 return AVERROR(ENOMEM);
1133 descr->dec_config_descr_len = len;
1134 avio_read(&d->pb, descr->dec_config_descr, len);
1138 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1140 Mp4Descr *descr = d->active_descr;
1145 predefined = avio_r8(&d->pb);
1148 int flags = avio_r8(&d->pb);
1149 descr->sl.use_au_start = !!(flags & 0x80);
1150 descr->sl.use_au_end = !!(flags & 0x40);
1151 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1152 descr->sl.use_padding = !!(flags & 0x08);
1153 descr->sl.use_timestamps = !!(flags & 0x04);
1154 descr->sl.use_idle = !!(flags & 0x02);
1155 descr->sl.timestamp_res = avio_rb32(&d->pb);
1157 descr->sl.timestamp_len = avio_r8(&d->pb);
1158 descr->sl.ocr_len = avio_r8(&d->pb);
1159 descr->sl.au_len = avio_r8(&d->pb);
1160 descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1161 lengths = avio_rb16(&d->pb);
1162 descr->sl.degr_prior_len = lengths >> 12;
1163 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1164 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1166 av_log_missing_feature(d->s, "Predefined SLConfigDescriptor", 0);
1171 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1174 int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1175 update_offsets(&d->pb, &off, &len);
1176 if (len < 0 || len1 > len || len1 <= 0) {
1177 av_log(d->s, AV_LOG_ERROR, "Tag %x length violation new length %d bytes remaining %d\n", tag, len1, len);
1181 if (d->level++ >= MAX_LEVEL) {
1182 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1186 if (target_tag && tag != target_tag) {
1187 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag, target_tag);
1193 parse_MP4IODescrTag(d, off, len1);
1196 parse_MP4ODescrTag(d, off, len1);
1199 parse_MP4ESDescrTag(d, off, len1);
1201 case MP4DecConfigDescrTag:
1202 parse_MP4DecConfigDescrTag(d, off, len1);
1205 parse_MP4SLDescrTag(d, off, len1);
1211 avio_seek(&d->pb, off + len1, SEEK_SET);
1215 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1216 Mp4Descr *descr, int *descr_count, int max_descr_count)
1218 MP4DescrParseContext d;
1219 if (init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count) < 0)
1222 parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1224 *descr_count = d.descr_count;
1228 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1229 Mp4Descr *descr, int *descr_count, int max_descr_count)
1231 MP4DescrParseContext d;
1232 if (init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count) < 0)
1235 parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1237 *descr_count = d.descr_count;
1241 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1243 MpegTSContext *ts = filter->u.section_filter.opaque;
1245 const uint8_t *p, *p_end;
1247 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }};
1248 int mp4_descr_count = 0;
1250 AVFormatContext *s = ts->stream;
1252 p_end = section + section_len - 4;
1254 if (parse_section_header(&h, &p, p_end) < 0)
1256 if (h.tid != M4OD_TID)
1259 mp4_read_od(s, p, (unsigned)(p_end - p), mp4_descr, &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1261 for (pid = 0; pid < NB_PID_MAX; pid++) {
1264 for (i = 0; i < mp4_descr_count; i++) {
1267 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1269 if (!(ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES)) {
1270 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1273 pes = ts->pids[pid]->u.pes_filter.opaque;
1279 pes->sl = mp4_descr[i].sl;
1281 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1282 mp4_descr[i].dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
1283 ff_mp4_read_dec_config_descr(s, st, &pb);
1284 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1285 st->codec->extradata_size > 0)
1286 st->need_parsing = 0;
1287 if (st->codec->codec_id == AV_CODEC_ID_H264 &&
1288 st->codec->extradata_size > 0)
1289 st->need_parsing = 0;
1291 if (st->codec->codec_id <= AV_CODEC_ID_NONE) {
1292 } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_AUDIO) {
1293 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
1294 } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_SUBTITLE) {
1295 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
1296 } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_UNKNOWN) {
1297 st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
1301 for (i = 0; i < mp4_descr_count; i++)
1302 av_free(mp4_descr[i].dec_config_descr);
1305 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1306 const uint8_t **pp, const uint8_t *desc_list_end,
1307 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1310 const uint8_t *desc_end;
1311 int desc_len, desc_tag, desc_es_id;
1315 desc_tag = get8(pp, desc_list_end);
1318 desc_len = get8(pp, desc_list_end);
1321 desc_end = *pp + desc_len;
1322 if (desc_end > desc_list_end)
1325 av_dlog(fc, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1327 if (st->codec->codec_id == AV_CODEC_ID_NONE &&
1328 stream_type == STREAM_TYPE_PRIVATE_DATA)
1329 mpegts_find_stream_type(st, desc_tag, DESC_types);
1332 case 0x1E: /* SL descriptor */
1333 desc_es_id = get16(pp, desc_end);
1334 if (ts && ts->pids[pid])
1335 ts->pids[pid]->es_id = desc_es_id;
1336 for (i = 0; i < mp4_descr_count; i++)
1337 if (mp4_descr[i].dec_config_descr_len &&
1338 mp4_descr[i].es_id == desc_es_id) {
1340 ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1341 mp4_descr[i].dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
1342 ff_mp4_read_dec_config_descr(fc, st, &pb);
1343 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1344 st->codec->extradata_size > 0)
1345 st->need_parsing = 0;
1346 if (st->codec->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1347 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1350 case 0x1F: /* FMC descriptor */
1351 get16(pp, desc_end);
1352 if (mp4_descr_count > 0 && (st->codec->codec_id == AV_CODEC_ID_AAC_LATM || st->request_probe>0) &&
1353 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1355 ffio_init_context(&pb, mp4_descr->dec_config_descr,
1356 mp4_descr->dec_config_descr_len, 0, NULL, NULL, NULL, NULL);
1357 ff_mp4_read_dec_config_descr(fc, st, &pb);
1358 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
1359 st->codec->extradata_size > 0){
1360 st->request_probe= st->need_parsing = 0;
1361 st->codec->codec_type= AVMEDIA_TYPE_AUDIO;
1365 case 0x56: /* DVB teletext descriptor */
1366 language[0] = get8(pp, desc_end);
1367 language[1] = get8(pp, desc_end);
1368 language[2] = get8(pp, desc_end);
1370 av_dict_set(&st->metadata, "language", language, 0);
1372 case 0x59: /* subtitling descriptor */
1373 language[0] = get8(pp, desc_end);
1374 language[1] = get8(pp, desc_end);
1375 language[2] = get8(pp, desc_end);
1377 /* hearing impaired subtitles detection */
1378 switch(get8(pp, desc_end)) {
1379 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1380 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1381 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1382 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1383 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1384 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1385 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1388 if (st->codec->extradata) {
1389 if (st->codec->extradata_size == 4 && memcmp(st->codec->extradata, *pp, 4))
1390 av_log_ask_for_sample(fc, "DVB sub with multiple IDs\n");
1392 st->codec->extradata = av_malloc(4 + FF_INPUT_BUFFER_PADDING_SIZE);
1393 if (st->codec->extradata) {
1394 st->codec->extradata_size = 4;
1395 memcpy(st->codec->extradata, *pp, 4);
1399 av_dict_set(&st->metadata, "language", language, 0);
1401 case 0x0a: /* ISO 639 language descriptor */
1402 for (i = 0; i + 4 <= desc_len; i += 4) {
1403 language[i + 0] = get8(pp, desc_end);
1404 language[i + 1] = get8(pp, desc_end);
1405 language[i + 2] = get8(pp, desc_end);
1406 language[i + 3] = ',';
1407 switch (get8(pp, desc_end)) {
1408 case 0x01: st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS; break;
1409 case 0x02: st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; break;
1410 case 0x03: st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; break;
1414 language[i - 1] = 0;
1415 av_dict_set(&st->metadata, "language", language, 0);
1418 case 0x05: /* registration descriptor */
1419 st->codec->codec_tag = bytestream_get_le32(pp);
1420 av_dlog(fc, "reg_desc=%.4s\n", (char*)&st->codec->codec_tag);
1421 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1422 mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types);
1424 case 0x52: /* stream identifier descriptor */
1425 st->stream_identifier = 1 + get8(pp, desc_end);
1434 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1436 MpegTSContext *ts = filter->u.section_filter.opaque;
1437 SectionHeader h1, *h = &h1;
1440 const uint8_t *p, *p_end, *desc_list_end;
1441 int program_info_length, pcr_pid, pid, stream_type;
1443 uint32_t prog_reg_desc = 0; /* registration descriptor */
1445 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = {{ 0 }};
1446 int mp4_descr_count = 0;
1449 av_dlog(ts->stream, "PMT: len %i\n", section_len);
1450 hex_dump_debug(ts->stream, section, section_len);
1452 p_end = section + section_len - 4;
1454 if (parse_section_header(h, &p, p_end) < 0)
1457 av_dlog(ts->stream, "sid=0x%x sec_num=%d/%d\n",
1458 h->id, h->sec_num, h->last_sec_num);
1460 if (h->tid != PMT_TID)
1463 clear_program(ts, h->id);
1464 pcr_pid = get16(&p, p_end);
1468 add_pid_to_pmt(ts, h->id, pcr_pid);
1469 set_pcr_pid(ts->stream, h->id, pcr_pid);
1471 av_dlog(ts->stream, "pcr_pid=0x%x\n", pcr_pid);
1473 program_info_length = get16(&p, p_end);
1474 if (program_info_length < 0)
1476 program_info_length &= 0xfff;
1477 while(program_info_length >= 2) {
1479 tag = get8(&p, p_end);
1480 len = get8(&p, p_end);
1482 av_dlog(ts->stream, "program tag: 0x%02x len=%d\n", tag, len);
1484 if(len > program_info_length - 2)
1485 //something else is broken, exit the program_descriptors_loop
1487 program_info_length -= len + 2;
1488 if (tag == 0x1d) { // IOD descriptor
1489 get8(&p, p_end); // scope
1490 get8(&p, p_end); // label
1492 mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
1493 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
1494 } else if (tag == 0x05 && len >= 4) { // registration descriptor
1495 prog_reg_desc = bytestream_get_le32(&p);
1500 p += program_info_length;
1504 // stop parsing after pmt, we found header
1505 if (!ts->stream->nb_streams)
1511 stream_type = get8(&p, p_end);
1512 if (stream_type < 0)
1514 pid = get16(&p, p_end);
1518 if (pid == ts->current_pid)
1521 /* now create stream */
1522 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
1523 pes = ts->pids[pid]->u.pes_filter.opaque;
1525 pes->st = avformat_new_stream(pes->stream, NULL);
1528 pes->st->id = pes->pid;
1531 } else if (stream_type != 0x13) {
1532 if (ts->pids[pid]) mpegts_close_filter(ts, ts->pids[pid]); //wrongly added sdt filter probably
1533 pes = add_pes_stream(ts, pid, pcr_pid);
1535 st = avformat_new_stream(pes->stream, NULL);
1541 int idx = ff_find_stream_index(ts->stream, pid);
1543 st = ts->stream->streams[idx];
1545 st = avformat_new_stream(ts->stream, NULL);
1549 st->codec->codec_type = AVMEDIA_TYPE_DATA;
1556 if (pes && !pes->stream_type)
1557 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
1559 add_pid_to_pmt(ts, h->id, pid);
1561 ff_program_add_stream_index(ts->stream, h->id, st->index);
1563 desc_list_len = get16(&p, p_end);
1564 if (desc_list_len < 0)
1566 desc_list_len &= 0xfff;
1567 desc_list_end = p + desc_list_len;
1568 if (desc_list_end > p_end)
1571 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p, desc_list_end,
1572 mp4_descr, mp4_descr_count, pid, ts) < 0)
1575 if (pes && prog_reg_desc == AV_RL32("HDMV") && stream_type == 0x83 && pes->sub_st) {
1576 ff_program_add_stream_index(ts->stream, h->id, pes->sub_st->index);
1577 pes->sub_st->codec->codec_tag = st->codec->codec_tag;
1584 for (i = 0; i < mp4_descr_count; i++)
1585 av_free(mp4_descr[i].dec_config_descr);
1588 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1590 MpegTSContext *ts = filter->u.section_filter.opaque;
1591 SectionHeader h1, *h = &h1;
1592 const uint8_t *p, *p_end;
1596 av_dlog(ts->stream, "PAT:\n");
1597 hex_dump_debug(ts->stream, section, section_len);
1599 p_end = section + section_len - 4;
1601 if (parse_section_header(h, &p, p_end) < 0)
1603 if (h->tid != PAT_TID)
1606 ts->stream->ts_id = h->id;
1610 sid = get16(&p, p_end);
1613 pmt_pid = get16(&p, p_end);
1618 if (pmt_pid == ts->current_pid)
1621 av_dlog(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
1623 if (sid == 0x0000) {
1626 program = av_new_program(ts->stream, sid);
1627 program->program_num = sid;
1628 program->pmt_pid = pmt_pid;
1629 if (ts->pids[pmt_pid])
1630 mpegts_close_filter(ts, ts->pids[pmt_pid]);
1631 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
1632 add_pat_entry(ts, sid);
1633 add_pid_to_pmt(ts, sid, 0); //add pat pid to program
1634 add_pid_to_pmt(ts, sid, pmt_pid);
1639 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1641 MpegTSContext *ts = filter->u.section_filter.opaque;
1642 SectionHeader h1, *h = &h1;
1643 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
1644 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
1645 char *name, *provider_name;
1647 av_dlog(ts->stream, "SDT:\n");
1648 hex_dump_debug(ts->stream, section, section_len);
1650 p_end = section + section_len - 4;
1652 if (parse_section_header(h, &p, p_end) < 0)
1654 if (h->tid != SDT_TID)
1656 onid = get16(&p, p_end);
1659 val = get8(&p, p_end);
1663 sid = get16(&p, p_end);
1666 val = get8(&p, p_end);
1669 desc_list_len = get16(&p, p_end);
1670 if (desc_list_len < 0)
1672 desc_list_len &= 0xfff;
1673 desc_list_end = p + desc_list_len;
1674 if (desc_list_end > p_end)
1677 desc_tag = get8(&p, desc_list_end);
1680 desc_len = get8(&p, desc_list_end);
1681 desc_end = p + desc_len;
1682 if (desc_end > desc_list_end)
1685 av_dlog(ts->stream, "tag: 0x%02x len=%d\n",
1686 desc_tag, desc_len);
1690 service_type = get8(&p, p_end);
1691 if (service_type < 0)
1693 provider_name = getstr8(&p, p_end);
1696 name = getstr8(&p, p_end);
1698 AVProgram *program = av_new_program(ts->stream, sid);
1700 av_dict_set(&program->metadata, "service_name", name, 0);
1701 av_dict_set(&program->metadata, "service_provider", provider_name, 0);
1705 av_free(provider_name);
1716 /* handle one TS packet */
1717 static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
1719 AVFormatContext *s = ts->stream;
1721 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
1722 has_adaptation, has_payload;
1723 const uint8_t *p, *p_end;
1726 pid = AV_RB16(packet + 1) & 0x1fff;
1727 if(pid && discard_pid(ts, pid))
1729 is_start = packet[1] & 0x40;
1730 tss = ts->pids[pid];
1731 if (ts->auto_guess && tss == NULL && is_start) {
1732 add_pes_stream(ts, pid, -1);
1733 tss = ts->pids[pid];
1737 ts->current_pid = pid;
1739 afc = (packet[3] >> 4) & 3;
1740 if (afc == 0) /* reserved value */
1742 has_adaptation = afc & 2;
1743 has_payload = afc & 1;
1744 is_discontinuity = has_adaptation
1745 && packet[4] != 0 /* with length > 0 */
1746 && (packet[5] & 0x80); /* and discontinuity indicated */
1748 /* continuity check (currently not used) */
1749 cc = (packet[3] & 0xf);
1750 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
1751 cc_ok = pid == 0x1FFF // null packet PID
1754 || expected_cc == cc;
1758 av_log(ts->stream, AV_LOG_DEBUG,
1759 "Continuity check failed for pid %d expected %d got %d\n",
1760 pid, expected_cc, cc);
1761 if(tss->type == MPEGTS_PES) {
1762 PESContext *pc = tss->u.pes_filter.opaque;
1763 pc->flags |= AV_PKT_FLAG_CORRUPT;
1770 if (has_adaptation) {
1771 /* skip adaptation field */
1774 /* if past the end of packet, ignore */
1775 p_end = packet + TS_PACKET_SIZE;
1779 pos = avio_tell(ts->stream->pb);
1780 ts->pos47= pos % ts->raw_packet_size;
1782 if (tss->type == MPEGTS_SECTION) {
1784 /* pointer field present */
1786 if (p + len > p_end)
1789 /* write remaining section bytes */
1790 write_section_data(s, tss,
1792 /* check whether filter has been closed */
1798 write_section_data(s, tss,
1803 write_section_data(s, tss,
1809 // Note: The position here points actually behind the current packet.
1810 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
1811 pos - ts->raw_packet_size)) < 0)
1818 /* XXX: try to find a better synchro over several packets (use
1819 get_packet_size() ?) */
1820 static int mpegts_resync(AVFormatContext *s)
1822 AVIOContext *pb = s->pb;
1825 for(i = 0;i < MAX_RESYNC_SIZE; i++) {
1830 avio_seek(pb, -1, SEEK_CUR);
1834 av_log(s, AV_LOG_ERROR, "max resync size reached, could not find sync byte\n");
1839 /* return -1 if error or EOF. Return 0 if OK. */
1840 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size)
1842 AVIOContext *pb = s->pb;
1846 len = avio_read(pb, buf, TS_PACKET_SIZE);
1847 if (len != TS_PACKET_SIZE)
1848 return len < 0 ? len : AVERROR_EOF;
1849 /* check packet sync byte */
1850 if (buf[0] != 0x47) {
1851 /* find a new packet start */
1852 avio_seek(pb, -TS_PACKET_SIZE, SEEK_CUR);
1853 if (mpegts_resync(s) < 0)
1854 return AVERROR(EAGAIN);
1858 skip = raw_packet_size - TS_PACKET_SIZE;
1860 avio_skip(pb, skip);
1867 static int handle_packets(MpegTSContext *ts, int nb_packets)
1869 AVFormatContext *s = ts->stream;
1870 uint8_t packet[TS_PACKET_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
1871 int packet_num, ret = 0;
1873 if (avio_tell(s->pb) != ts->last_pos) {
1875 av_dlog(ts->stream, "Skipping after seek\n");
1876 /* seek detected, flush pes buffer */
1877 for (i = 0; i < NB_PID_MAX; i++) {
1879 if (ts->pids[i]->type == MPEGTS_PES) {
1880 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
1881 av_freep(&pes->buffer);
1882 pes->data_index = 0;
1883 pes->state = MPEGTS_SKIP; /* skip until pes header */
1885 ts->pids[i]->last_cc = -1;
1892 memset(packet + TS_PACKET_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1895 if (nb_packets != 0 && packet_num >= nb_packets ||
1896 ts->stop_parse > 1) {
1897 ret = AVERROR(EAGAIN);
1900 if (ts->stop_parse > 0)
1903 ret = read_packet(s, packet, ts->raw_packet_size);
1906 ret = handle_packet(ts, packet);
1910 ts->last_pos = avio_tell(s->pb);
1914 static int mpegts_probe(AVProbeData *p)
1916 const int size= p->buf_size;
1920 int check_count= size / TS_FEC_PACKET_SIZE;
1921 #define CHECK_COUNT 10
1922 #define CHECK_BLOCK 100
1924 if (check_count < CHECK_COUNT)
1927 for (i=0; i<check_count; i+=CHECK_BLOCK){
1928 int left = FFMIN(check_count - i, CHECK_BLOCK);
1929 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , NULL);
1930 int dvhs_score= analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, NULL);
1931 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , NULL);
1932 score = FFMAX3(score, dvhs_score, fec_score);
1934 maxscore = FFMAX(maxscore, score);
1937 sumscore = sumscore*CHECK_COUNT/check_count;
1938 maxscore = maxscore*CHECK_COUNT/CHECK_BLOCK;
1940 av_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
1942 if (sumscore > 6) return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
1943 else if (maxscore > 6) return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
1947 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
1948 (-1) if not available */
1949 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
1950 const uint8_t *packet)
1952 int afc, len, flags;
1956 afc = (packet[3] >> 4) & 3;
1966 if (!(flags & 0x10))
1971 *ppcr_high = ((int64_t)v << 1) | (p[4] >> 7);
1972 *ppcr_low = ((p[4] & 1) << 8) | p[5];
1976 static int mpegts_read_header(AVFormatContext *s)
1978 MpegTSContext *ts = s->priv_data;
1979 AVIOContext *pb = s->pb;
1980 uint8_t buf[8*1024]={0};
1984 /* read the first 8192 bytes to get packet size */
1985 pos = avio_tell(pb);
1986 len = avio_read(pb, buf, sizeof(buf));
1987 ts->raw_packet_size = get_packet_size(buf, len);
1988 if (ts->raw_packet_size <= 0) {
1989 av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
1990 ts->raw_packet_size = TS_PACKET_SIZE;
1995 if (s->iformat == &ff_mpegts_demuxer) {
1998 /* first do a scan to get all the services */
1999 /* NOTE: We attempt to seek on non-seekable files as well, as the
2000 * probe buffer usually is big enough. Only warn if the seek failed
2001 * on files where the seek should work. */
2002 if (avio_seek(pb, pos, SEEK_SET) < 0)
2003 av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2005 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2007 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2009 handle_packets(ts, s->probesize / ts->raw_packet_size);
2010 /* if could not find service, enable auto_guess */
2014 av_dlog(ts->stream, "tuning done\n");
2016 s->ctx_flags |= AVFMTCTX_NOHEADER;
2019 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2020 int64_t pcrs[2], pcr_h;
2021 int packet_count[2];
2022 uint8_t packet[TS_PACKET_SIZE];
2024 /* only read packets */
2026 st = avformat_new_stream(s, NULL);
2029 avpriv_set_pts_info(st, 60, 1, 27000000);
2030 st->codec->codec_type = AVMEDIA_TYPE_DATA;
2031 st->codec->codec_id = AV_CODEC_ID_MPEG2TS;
2033 /* we iterate until we find two PCRs to estimate the bitrate */
2038 ret = read_packet(s, packet, ts->raw_packet_size);
2041 pid = AV_RB16(packet + 1) & 0x1fff;
2042 if ((pcr_pid == -1 || pcr_pid == pid) &&
2043 parse_pcr(&pcr_h, &pcr_l, packet) == 0) {
2045 packet_count[nb_pcrs] = nb_packets;
2046 pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2054 /* NOTE1: the bitrate is computed without the FEC */
2055 /* NOTE2: it is only the bitrate of the start of the stream */
2056 ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2057 ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2058 s->bit_rate = (TS_PACKET_SIZE * 8) * 27e6 / ts->pcr_incr;
2059 st->codec->bit_rate = s->bit_rate;
2060 st->start_time = ts->cur_pcr;
2061 av_dlog(ts->stream, "start=%0.3f pcr=%0.3f incr=%d\n",
2062 st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2065 avio_seek(pb, pos, SEEK_SET);
2071 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2073 static int mpegts_raw_read_packet(AVFormatContext *s,
2076 MpegTSContext *ts = s->priv_data;
2078 int64_t pcr_h, next_pcr_h, pos;
2079 int pcr_l, next_pcr_l;
2080 uint8_t pcr_buf[12];
2082 if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2083 return AVERROR(ENOMEM);
2084 pkt->pos= avio_tell(s->pb);
2085 ret = read_packet(s, pkt->data, ts->raw_packet_size);
2087 av_free_packet(pkt);
2090 if (ts->mpeg2ts_compute_pcr) {
2091 /* compute exact PCR for each packet */
2092 if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2093 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
2094 pos = avio_tell(s->pb);
2095 for(i = 0; i < MAX_PACKET_READAHEAD; i++) {
2096 avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2097 avio_read(s->pb, pcr_buf, 12);
2098 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2099 /* XXX: not precise enough */
2100 ts->pcr_incr = ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2105 avio_seek(s->pb, pos, SEEK_SET);
2106 /* no next PCR found: we use previous increment */
2107 ts->cur_pcr = pcr_h * 300 + pcr_l;
2109 pkt->pts = ts->cur_pcr;
2110 pkt->duration = ts->pcr_incr;
2111 ts->cur_pcr += ts->pcr_incr;
2113 pkt->stream_index = 0;
2117 static int mpegts_read_packet(AVFormatContext *s,
2120 MpegTSContext *ts = s->priv_data;
2125 ret = handle_packets(ts, 0);
2127 av_free_packet(ts->pkt);
2128 /* flush pes data left */
2129 for (i = 0; i < NB_PID_MAX; i++) {
2130 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2131 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2132 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2133 new_pes_packet(pes, pkt);
2134 pes->state = MPEGTS_SKIP;
2142 if (!ret && pkt->size < 0)
2143 ret = AVERROR(EINTR);
2147 static void mpegts_free(MpegTSContext *ts)
2153 for(i=0;i<NB_PID_MAX;i++)
2154 if (ts->pids[i]) mpegts_close_filter(ts, ts->pids[i]);
2157 static int mpegts_read_close(AVFormatContext *s)
2159 MpegTSContext *ts = s->priv_data;
2164 static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2165 int64_t *ppos, int64_t pos_limit)
2167 MpegTSContext *ts = s->priv_data;
2168 int64_t pos, timestamp;
2169 uint8_t buf[TS_PACKET_SIZE];
2170 int pcr_l, pcr_pid = ((PESContext*)s->streams[stream_index]->priv_data)->pcr_pid;
2171 pos = ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->pos47;
2172 while(pos < pos_limit) {
2173 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2174 return AV_NOPTS_VALUE;
2175 if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2176 return AV_NOPTS_VALUE;
2177 if (buf[0] != 0x47) {
2178 if (mpegts_resync(s) < 0)
2179 return AV_NOPTS_VALUE;
2180 pos = avio_tell(s->pb);
2183 if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2184 parse_pcr(×tamp, &pcr_l, buf) == 0) {
2188 pos += ts->raw_packet_size;
2191 return AV_NOPTS_VALUE;
2194 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2195 int64_t *ppos, int64_t pos_limit)
2197 MpegTSContext *ts = s->priv_data;
2199 pos = ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->pos47;
2200 ff_read_frame_flush(s);
2201 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2202 return AV_NOPTS_VALUE;
2203 while(pos < pos_limit) {
2206 av_init_packet(&pkt);
2207 ret= av_read_frame(s, &pkt);
2209 return AV_NOPTS_VALUE;
2210 av_free_packet(&pkt);
2211 if(pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0){
2212 ff_reduce_index(s, pkt.stream_index);
2213 av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
2214 if(pkt.stream_index == stream_index){
2222 return AV_NOPTS_VALUE;
2225 /**************************************************************/
2226 /* parsing functions - called from other demuxers such as RTP */
2228 MpegTSContext *ff_mpegts_parse_open(AVFormatContext *s)
2232 ts = av_mallocz(sizeof(MpegTSContext));
2235 /* no stream case, currently used by RTP */
2236 ts->raw_packet_size = TS_PACKET_SIZE;
2239 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2240 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2245 /* return the consumed length if a packet was output, or -1 if no
2247 int ff_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
2248 const uint8_t *buf, int len)
2256 if (len < TS_PACKET_SIZE)
2258 if (buf[0] != 0x47) {
2262 handle_packet(ts, buf);
2263 buf += TS_PACKET_SIZE;
2264 len -= TS_PACKET_SIZE;
2265 if (ts->stop_parse == 1)
2272 void ff_mpegts_parse_close(MpegTSContext *ts)
2278 AVInputFormat ff_mpegts_demuxer = {
2280 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2281 .priv_data_size = sizeof(MpegTSContext),
2282 .read_probe = mpegts_probe,
2283 .read_header = mpegts_read_header,
2284 .read_packet = mpegts_read_packet,
2285 .read_close = mpegts_read_close,
2286 .read_timestamp = mpegts_get_dts,
2287 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2290 AVInputFormat ff_mpegtsraw_demuxer = {
2291 .name = "mpegtsraw",
2292 .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
2293 .priv_data_size = sizeof(MpegTSContext),
2294 .read_header = mpegts_read_header,
2295 .read_packet = mpegts_raw_read_packet,
2296 .read_close = mpegts_read_close,
2297 .read_timestamp = mpegts_get_dts,
2298 .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2299 .priv_class = &mpegtsraw_class,