Libav
Data Structures | Macros | Typedefs | Enumerations | Functions | Variables
mpegts.c File Reference
#include "libavutil/buffer.h"
#include "libavutil/crc.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/log.h"
#include "libavutil/dict.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavcodec/bytestream.h"
#include "libavcodec/get_bits.h"
#include "libavcodec/mathops.h"
#include "avformat.h"
#include "mpegts.h"
#include "internal.h"
#include "avio_internal.h"
#include "seek.h"
#include "mpeg.h"
#include "isom.h"

Go to the source code of this file.

Data Structures

struct  MpegTSPESFilter
 
struct  MpegTSSectionFilter
 
struct  MpegTSFilter
 
struct  Program
 
struct  MpegTSContext
 
struct  PESContext
 
struct  SectionHeader
 
struct  StreamType
 
struct  MP4DescrParseContext
 

Macros

#define MAX_RESYNC_SIZE   65536
 
#define MAX_PES_PAYLOAD   200*1024
 
#define MAX_MP4_DESCR_COUNT   16
 
#define MAX_PIDS_PER_PROGRAM   64
 
#define PES_START_SIZE   6
 
#define PES_HEADER_SIZE   9
 
#define MAX_PES_HEADER_SIZE   (9 + 255)
 
#define MAX_LEVEL   4
 
#define CHECK_COUNT   10
 
#define MAX_PACKET_READAHEAD   ((128 * 1024) / 188)
 

Typedefs

typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos)
 
typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len)
 
typedef void SetServiceCallback (void *opaque, int ret)
 

Enumerations

enum  MpegTSFilterType { MPEGTS_PES, MPEGTS_SECTION }
 
enum  MpegTSState {
  MPEGTS_HEADER = 0, MPEGTS_PESHEADER, MPEGTS_PESHEADER_FILL, MPEGTS_PAYLOAD,
  MPEGTS_SKIP
}
 

Functions

static void clear_program (MpegTSContext *ts, unsigned int programid)
 
static void clear_programs (MpegTSContext *ts)
 
static void add_pat_entry (MpegTSContext *ts, unsigned int programid)
 
static void add_pid_to_pmt (MpegTSContext *ts, unsigned int programid, unsigned int pid)
 
static int discard_pid (MpegTSContext *ts, unsigned int pid)
 discard_pid() decides if the pid is to be discarded according to caller's programs selection More...
 
static void write_section_data (AVFormatContext *s, MpegTSFilter *tss1, const uint8_t *buf, int buf_size, int is_start)
 Assemble PES packets out of TS packets, and then call the "section_cb" function when they are complete. More...
 
static MpegTSFiltermpegts_open_section_filter (MpegTSContext *ts, unsigned int pid, SectionCallback *section_cb, void *opaque, int check_crc)
 
static MpegTSFiltermpegts_open_pes_filter (MpegTSContext *ts, unsigned int pid, PESCallback *pes_cb, void *opaque)
 
static void mpegts_close_filter (MpegTSContext *ts, MpegTSFilter *filter)
 
static int analyze (const uint8_t *buf, int size, int packet_size, int *index)
 
static int get_packet_size (const uint8_t *buf, int size)
 
static int get8 (const uint8_t **pp, const uint8_t *p_end)
 
static int get16 (const uint8_t **pp, const uint8_t *p_end)
 
static char * getstr8 (const uint8_t **pp, const uint8_t *p_end)
 
static int parse_section_header (SectionHeader *h, const uint8_t **pp, const uint8_t *p_end)
 
static void mpegts_find_stream_type (AVStream *st, uint32_t stream_type, const StreamType *types)
 
static int mpegts_set_stream_info (AVStream *st, PESContext *pes, uint32_t stream_type, uint32_t prog_reg_desc)
 
static void new_pes_packet (PESContext *pes, AVPacket *pkt)
 
static int read_sl_header (PESContext *pes, SLConfigDescr *sl, const uint8_t *buf, int buf_size)
 
static int mpegts_push_data (MpegTSFilter *filter, const uint8_t *buf, int buf_size, int is_start, int64_t pos)
 
static PESContextadd_pes_stream (MpegTSContext *ts, int pid, int pcr_pid)
 
static int init_MP4DescrParseContext (MP4DescrParseContext *d, AVFormatContext *s, const uint8_t *buf, unsigned size, Mp4Descr *descr, int max_descr_count)
 
static void update_offsets (AVIOContext *pb, int64_t *off, int *len)
 
static int parse_mp4_descr (MP4DescrParseContext *d, int64_t off, int len, int target_tag)
 
static int parse_mp4_descr_arr (MP4DescrParseContext *d, int64_t off, int len)
 
static int parse_MP4IODescrTag (MP4DescrParseContext *d, int64_t off, int len)
 
static int parse_MP4ODescrTag (MP4DescrParseContext *d, int64_t off, int len)
 
static int parse_MP4ESDescrTag (MP4DescrParseContext *d, int64_t off, int len)
 
static int parse_MP4DecConfigDescrTag (MP4DescrParseContext *d, int64_t off, int len)
 
static int parse_MP4SLDescrTag (MP4DescrParseContext *d, int64_t off, int len)
 
static int mp4_read_iods (AVFormatContext *s, const uint8_t *buf, unsigned size, Mp4Descr *descr, int *descr_count, int max_descr_count)
 
static int mp4_read_od (AVFormatContext *s, const uint8_t *buf, unsigned size, Mp4Descr *descr, int *descr_count, int max_descr_count)
 
static void m4sl_cb (MpegTSFilter *filter, const uint8_t *section, int section_len)
 
int ff_parse_mpeg2_descriptor (AVFormatContext *fc, AVStream *st, int stream_type, const uint8_t **pp, const uint8_t *desc_list_end, Mp4Descr *mp4_descr, int mp4_descr_count, int pid, MpegTSContext *ts)
 Parse an MPEG-2 descriptor. More...
 
static void pmt_cb (MpegTSFilter *filter, const uint8_t *section, int section_len)
 
static void pat_cb (MpegTSFilter *filter, const uint8_t *section, int section_len)
 
static void sdt_cb (MpegTSFilter *filter, const uint8_t *section, int section_len)
 
static int handle_packet (MpegTSContext *ts, const uint8_t *packet)
 
static int mpegts_resync (AVFormatContext *s)
 
static int read_packet (AVFormatContext *s, uint8_t *buf, int raw_packet_size, const uint8_t **data)
 
static void finished_reading_packet (AVFormatContext *s, int raw_packet_size)
 
static int handle_packets (MpegTSContext *ts, int nb_packets)
 
static int mpegts_probe (AVProbeData *p)
 
static int parse_pcr (int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
 
static int mpegts_read_header (AVFormatContext *s)
 
static int mpegts_raw_read_packet (AVFormatContext *s, AVPacket *pkt)
 
static int mpegts_read_packet (AVFormatContext *s, AVPacket *pkt)
 
static void mpegts_free (MpegTSContext *ts)
 
static int mpegts_read_close (AVFormatContext *s)
 
static int64_t mpegts_get_pcr (AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
 
static int read_seek (AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
 
MpegTSContextff_mpegts_parse_open (AVFormatContext *s)
 
int ff_mpegts_parse_packet (MpegTSContext *ts, AVPacket *pkt, const uint8_t *buf, int len)
 
void ff_mpegts_parse_close (MpegTSContext *ts)
 

Variables

static const AVOption options []
 
static const AVClass mpegtsraw_class
 
AVInputFormat ff_mpegts_demuxer
 
static const StreamType ISO_types []
 
static const StreamType HDMV_types []
 
static const StreamType MISC_types []
 
static const StreamType REGD_types []
 
static const StreamType DESC_types []
 
AVInputFormat ff_mpegtsraw_demuxer
 

Macro Definition Documentation

#define MAX_RESYNC_SIZE   65536

Definition at line 42 of file mpegts.c.

Referenced by mpegts_resync().

#define MAX_PES_PAYLOAD   200*1024

Definition at line 44 of file mpegts.c.

Referenced by mpegts_push_data(), and new_pes_packet().

#define MAX_MP4_DESCR_COUNT   16

Definition at line 46 of file mpegts.c.

Referenced by m4sl_cb(), and pmt_cb().

#define MAX_PIDS_PER_PROGRAM   64

Definition at line 88 of file mpegts.c.

Referenced by add_pid_to_pmt().

#define PES_START_SIZE   6

Definition at line 159 of file mpegts.c.

Referenced by mpegts_push_data(), and new_pes_packet().

#define PES_HEADER_SIZE   9

Definition at line 160 of file mpegts.c.

Referenced by mpegts_push_data().

#define MAX_PES_HEADER_SIZE   (9 + 255)

Definition at line 161 of file mpegts.c.

#define MAX_LEVEL   4

Definition at line 977 of file mpegts.c.

Referenced by parse_mp4_descr().

#define CHECK_COUNT   10
#define MAX_PACKET_READAHEAD   ((128 * 1024) / 188)

Definition at line 2007 of file mpegts.c.

Referenced by mpegts_raw_read_packet().

Typedef Documentation

typedef int PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos)

Definition at line 55 of file mpegts.c.

typedef void SectionCallback(MpegTSFilter *f, const uint8_t *buf, int len)

Definition at line 62 of file mpegts.c.

typedef void SetServiceCallback(void *opaque, int ret)

Definition at line 64 of file mpegts.c.

Enumeration Type Documentation

Enumerator
MPEGTS_PES 
MPEGTS_SECTION 

Definition at line 48 of file mpegts.c.

Enumerator
MPEGTS_HEADER 
MPEGTS_PESHEADER 
MPEGTS_PESHEADER_FILL 
MPEGTS_PAYLOAD 
MPEGTS_SKIP 

Definition at line 150 of file mpegts.c.

Function Documentation

static void clear_program ( MpegTSContext ts,
unsigned int  programid 
)
static

Definition at line 187 of file mpegts.c.

Referenced by pmt_cb().

static void clear_programs ( MpegTSContext ts)
static

Definition at line 196 of file mpegts.c.

Referenced by mpegts_free(), and pat_cb().

static void add_pat_entry ( MpegTSContext ts,
unsigned int  programid 
)
static

Definition at line 202 of file mpegts.c.

Referenced by pat_cb().

static void add_pid_to_pmt ( MpegTSContext ts,
unsigned int  programid,
unsigned int  pid 
)
static

Definition at line 215 of file mpegts.c.

Referenced by pat_cb(), and pmt_cb().

static int discard_pid ( MpegTSContext ts,
unsigned int  pid 
)
static

discard_pid() decides if the pid is to be discarded according to caller's programs selection

Parameters
ts: - TS context
pid: - pid
Returns
1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL 0 otherwise

Definition at line 241 of file mpegts.c.

Referenced by handle_packet().

static void write_section_data ( AVFormatContext s,
MpegTSFilter tss1,
const uint8_t buf,
int  buf_size,
int  is_start 
)
static

Assemble PES packets out of TS packets, and then call the "section_cb" function when they are complete.

Definition at line 281 of file mpegts.c.

Referenced by handle_packet().

static MpegTSFilter* mpegts_open_section_filter ( MpegTSContext ts,
unsigned int  pid,
SectionCallback section_cb,
void opaque,
int  check_crc 
)
static

Definition at line 319 of file mpegts.c.

Referenced by ff_parse_mpeg2_descriptor(), mpegts_read_header(), and pat_cb().

static MpegTSFilter* mpegts_open_pes_filter ( MpegTSContext ts,
unsigned int  pid,
PESCallback pes_cb,
void opaque 
)
static

Definition at line 353 of file mpegts.c.

Referenced by add_pes_stream().

static void mpegts_close_filter ( MpegTSContext ts,
MpegTSFilter filter 
)
static

Definition at line 376 of file mpegts.c.

Referenced by mpegts_free(), pat_cb(), and pmt_cb().

static int analyze ( const uint8_t buf,
int  size,
int  packet_size,
int *  index 
)
static

Definition at line 397 of file mpegts.c.

Referenced by get_packet_size(), and mpegts_probe().

static int get_packet_size ( const uint8_t buf,
int  size 
)
static

Definition at line 422 of file mpegts.c.

Referenced by mpegts_read_header().

static int get8 ( const uint8_t **  pp,
const uint8_t p_end 
)
inlinestatic

Definition at line 449 of file mpegts.c.

Referenced by ff_parse_mpeg2_descriptor(), getstr8(), parse_section_header(), pmt_cb(), and sdt_cb().

static int get16 ( const uint8_t **  pp,
const uint8_t p_end 
)
inlinestatic

Definition at line 462 of file mpegts.c.

Referenced by ff_parse_mpeg2_descriptor(), parse_section_header(), pat_cb(), pmt_cb(), and sdt_cb().

static char* getstr8 ( const uint8_t **  pp,
const uint8_t p_end 
)
static

Definition at line 477 of file mpegts.c.

Referenced by sdt_cb().

static int parse_section_header ( SectionHeader h,
const uint8_t **  pp,
const uint8_t p_end 
)
static

Definition at line 499 of file mpegts.c.

Referenced by m4sl_cb(), pat_cb(), pmt_cb(), and sdt_cb().

static void mpegts_find_stream_type ( AVStream st,
uint32_t  stream_type,
const StreamType types 
)
static

Definition at line 591 of file mpegts.c.

Referenced by ff_parse_mpeg2_descriptor(), and mpegts_set_stream_info().

static int mpegts_set_stream_info ( AVStream st,
PESContext pes,
uint32_t  stream_type,
uint32_t  prog_reg_desc 
)
static

Definition at line 603 of file mpegts.c.

Referenced by mpegts_push_data(), and pmt_cb().

static void new_pes_packet ( PESContext pes,
AVPacket pkt 
)
static

Definition at line 655 of file mpegts.c.

Referenced by mpegts_push_data(), and mpegts_read_packet().

static int read_sl_header ( PESContext pes,
SLConfigDescr sl,
const uint8_t buf,
int  buf_size 
)
static

Definition at line 689 of file mpegts.c.

Referenced by mpegts_push_data().

static int mpegts_push_data ( MpegTSFilter filter,
const uint8_t buf,
int  buf_size,
int  is_start,
int64_t  pos 
)
static

Definition at line 755 of file mpegts.c.

Referenced by add_pes_stream().

static PESContext* add_pes_stream ( MpegTSContext ts,
int  pid,
int  pcr_pid 
)
static

Definition at line 953 of file mpegts.c.

Referenced by handle_packet(), and pmt_cb().

static int init_MP4DescrParseContext ( MP4DescrParseContext d,
AVFormatContext s,
const uint8_t buf,
unsigned  size,
Mp4Descr descr,
int  max_descr_count 
)
static

Definition at line 988 of file mpegts.c.

Referenced by mp4_read_iods(), and mp4_read_od().

static void update_offsets ( AVIOContext pb,
int64_t *  off,
int *  len 
)
static
static int parse_mp4_descr ( MP4DescrParseContext d,
int64_t  off,
int  len,
int  target_tag 
)
static

Definition at line 1119 of file mpegts.c.

Referenced by mp4_read_iods(), parse_mp4_descr_arr(), and parse_MP4ESDescrTag().

static int parse_mp4_descr_arr ( MP4DescrParseContext d,
int64_t  off,
int  len 
)
static

Definition at line 1019 of file mpegts.c.

Referenced by mp4_read_od(), parse_MP4IODescrTag(), and parse_MP4ODescrTag().

static int parse_MP4IODescrTag ( MP4DescrParseContext d,
int64_t  off,
int  len 
)
static

Definition at line 1029 of file mpegts.c.

Referenced by parse_mp4_descr().

static int parse_MP4ODescrTag ( MP4DescrParseContext d,
int64_t  off,
int  len 
)
static

Definition at line 1041 of file mpegts.c.

Referenced by parse_mp4_descr().

static int parse_MP4ESDescrTag ( MP4DescrParseContext d,
int64_t  off,
int  len 
)
static

Definition at line 1055 of file mpegts.c.

Referenced by parse_mp4_descr().

static int parse_MP4DecConfigDescrTag ( MP4DescrParseContext d,
int64_t  off,
int  len 
)
static

Definition at line 1073 of file mpegts.c.

Referenced by parse_mp4_descr().

static int parse_MP4SLDescrTag ( MP4DescrParseContext d,
int64_t  off,
int  len 
)
static

Definition at line 1086 of file mpegts.c.

Referenced by parse_mp4_descr().

static int mp4_read_iods ( AVFormatContext s,
const uint8_t buf,
unsigned  size,
Mp4Descr descr,
int *  descr_count,
int  max_descr_count 
)
static

Definition at line 1163 of file mpegts.c.

Referenced by pmt_cb().

static int mp4_read_od ( AVFormatContext s,
const uint8_t buf,
unsigned  size,
Mp4Descr descr,
int *  descr_count,
int  max_descr_count 
)
static

Definition at line 1176 of file mpegts.c.

Referenced by m4sl_cb().

static void m4sl_cb ( MpegTSFilter filter,
const uint8_t section,
int  section_len 
)
static

Definition at line 1189 of file mpegts.c.

Referenced by ff_parse_mpeg2_descriptor().

int ff_parse_mpeg2_descriptor ( AVFormatContext fc,
AVStream st,
int  stream_type,
const uint8_t **  pp,
const uint8_t desc_list_end,
Mp4Descr mp4_descr,
int  mp4_descr_count,
int  pid,
MpegTSContext ts 
)

Parse an MPEG-2 descriptor.

Parameters
[in]fcFormat context (used for logging only)
stStream
stream_typeSTREAM_TYPE_xxx
ppDescriptor buffer pointer
desc_list_endEnd of buffer
Returns
<0 to stop processing

Definition at line 1257 of file mpegts.c.

Referenced by parse_chunks(), and pmt_cb().

static void pmt_cb ( MpegTSFilter filter,
const uint8_t section,
int  section_len 
)
static

Definition at line 1381 of file mpegts.c.

Referenced by pat_cb().

static void pat_cb ( MpegTSFilter filter,
const uint8_t section,
int  section_len 
)
static

Definition at line 1530 of file mpegts.c.

Referenced by mpegts_read_header().

static void sdt_cb ( MpegTSFilter filter,
const uint8_t section,
int  section_len 
)
static

Definition at line 1577 of file mpegts.c.

Referenced by mpegts_read_header().

static int handle_packet ( MpegTSContext ts,
const uint8_t packet 
)
static

Definition at line 1660 of file mpegts.c.

Referenced by ff_mpegts_parse_packet(), and handle_packets().

static int mpegts_resync ( AVFormatContext s)
static

Definition at line 1762 of file mpegts.c.

Referenced by read_packet().

static int read_packet ( AVFormatContext s,
uint8_t buf,
int  raw_packet_size,
const uint8_t **  data 
)
static

Definition at line 1782 of file mpegts.c.

Referenced by handle_packets(), mpegts_raw_read_packet(), and mpegts_read_header().

static void finished_reading_packet ( AVFormatContext s,
int  raw_packet_size 
)
static

Definition at line 1806 of file mpegts.c.

Referenced by handle_packets(), mpegts_raw_read_packet(), and mpegts_read_header().

static int handle_packets ( MpegTSContext ts,
int  nb_packets 
)
static

Definition at line 1814 of file mpegts.c.

Referenced by mpegts_read_header(), and mpegts_read_packet().

static int mpegts_probe ( AVProbeData p)
static

Definition at line 1859 of file mpegts.c.

static int parse_pcr ( int64_t *  ppcr_high,
int *  ppcr_low,
const uint8_t packet 
)
static

Definition at line 1884 of file mpegts.c.

Referenced by mpegts_get_pcr(), mpegts_raw_read_packet(), and mpegts_read_header().

static int mpegts_read_header ( AVFormatContext s)
static

Definition at line 1911 of file mpegts.c.

static int mpegts_raw_read_packet ( AVFormatContext s,
AVPacket pkt 
)
static

Definition at line 2009 of file mpegts.c.

static int mpegts_read_packet ( AVFormatContext s,
AVPacket pkt 
)
static

Definition at line 2057 of file mpegts.c.

static void mpegts_free ( MpegTSContext ts)
static

Definition at line 2086 of file mpegts.c.

Referenced by ff_mpegts_parse_close(), and mpegts_read_close().

static int mpegts_read_close ( AVFormatContext s)
static

Definition at line 2096 of file mpegts.c.

static int64_t mpegts_get_pcr ( AVFormatContext s,
int  stream_index,
int64_t *  ppos,
int64_t  pos_limit 
)
static

Definition at line 2103 of file mpegts.c.

static int read_seek ( AVFormatContext s,
int  stream_index,
int64_t  target_ts,
int  flags 
)
static

Definition at line 2142 of file mpegts.c.

MpegTSContext* ff_mpegts_parse_open ( AVFormatContext s)

Definition at line 2168 of file mpegts.c.

Referenced by mpegts_init().

int ff_mpegts_parse_packet ( MpegTSContext ts,
AVPacket pkt,
const uint8_t buf,
int  len 
)

Definition at line 2184 of file mpegts.c.

Referenced by mpegts_handle_packet().

void ff_mpegts_parse_close ( MpegTSContext ts)

Definition at line 2209 of file mpegts.c.

Referenced by ff_rtsp_close_streams(), and mpegts_free_context().

Variable Documentation

const AVOption options[]
static
Initial value:
= {
{"compute_pcr", "Compute exact PCR for each transport stream packet.", 0x42, AV_OPT_TYPE_INT,
{.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
{ NULL },
}

Definition at line 135 of file mpegts.c.

const AVClass mpegtsraw_class
static
Initial value:
= {
.class_name = "mpegtsraw demuxer",
.item_name = av_default_item_name,
.option = options,
}

Definition at line 141 of file mpegts.c.

AVInputFormat ff_mpegts_demuxer
Initial value:
= {
.name = "mpegts",
.long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
.priv_data_size = sizeof(MpegTSContext),
.read_timestamp = mpegts_get_pcr,
}

Definition at line 2215 of file mpegts.c.

const StreamType ISO_types[]
static
const StreamType HDMV_types[]
static
const StreamType MISC_types[]
static
Initial value:

Definition at line 563 of file mpegts.c.

const StreamType REGD_types[]
static
Initial value:
= {
{ MKTAG('d','r','a','c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
{ MKTAG('A','C','-','3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
{ MKTAG('B','S','S','D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
{ MKTAG('D','T','S','1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
{ MKTAG('D','T','S','2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
{ MKTAG('D','T','S','3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
{ MKTAG('H','E','V','C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
{ MKTAG('V','C','-','1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
{ 0 },
}

Definition at line 569 of file mpegts.c.

const StreamType DESC_types[]
static
AVInputFormat ff_mpegtsraw_demuxer
Initial value:
= {
.name = "mpegtsraw",
.long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
.priv_data_size = sizeof(MpegTSContext),
.read_timestamp = mpegts_get_pcr,
.priv_class = &mpegtsraw_class,
}

Definition at line 2228 of file mpegts.c.