libavformat/mpegts.c File Reference

#include "libavutil/crc.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "mpegts.h"
#include "internal.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

Defines

#define MAX_SCAN_PACKETS   32000
#define MAX_RESYNC_SIZE   4096
#define REGISTRATION_DESCRIPTOR   5
#define MAX_PIDS_PER_PROGRAM   64
#define PES_START_SIZE   9
#define MAX_PES_HEADER_SIZE   (9 + 255)
#define CHECK_COUNT   10
#define MAX_PACKET_READAHEAD   ((128 * 1024) / 188)

Typedefs

typedef struct PESContext PESContext
typedef struct MpegTSFilter MpegTSFilter
typedef void 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_FILL, MPEGTS_PAYLOAD, MPEGTS_SKIP }

Functions

static PESContext * add_pes_stream (MpegTSContext *ts, int pid, int pcr_pid, int stream_type)
static AVStream * new_pes_av_stream (PESContext *pes, uint32_t code)
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
static void write_section_data (AVFormatContext *s, MpegTSFilter *tss1, const uint8_t *buf, int buf_size, int is_start)
 Assembles PES packets out of TS packets, and then calls the "section_cb" function when they are complete.
static MpegTSFilter * mpegts_open_section_filter (MpegTSContext *ts, unsigned int pid, SectionCallback *section_cb, void *opaque, int check_crc)
static MpegTSFilter * mpegts_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 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 mpegts_set_service (MpegTSContext *ts)
static void sdt_cb (MpegTSFilter *filter, const uint8_t *section, int section_len)
static void mpegts_scan_sdt (MpegTSContext *ts)
static int64_t get_pts (const uint8_t *p)
static void mpegts_push_data (MpegTSFilter *filter, const uint8_t *buf, int buf_size, int is_start, int64_t pos)
static void handle_packet (MpegTSContext *ts, const uint8_t *packet)
static int mpegts_resync (ByteIOContext *pb)
static int read_packet (ByteIOContext *pb, uint8_t *buf, 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, AVFormatParameters *ap)
static int mpegts_raw_read_packet (AVFormatContext *s, AVPacket *pkt)
static int mpegts_read_packet (AVFormatContext *s, AVPacket *pkt)
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)
MpegTSContext * mpegts_parse_open (AVFormatContext *s)
int mpegts_parse_packet (MpegTSContext *ts, AVPacket *pkt, const uint8_t *buf, int len)
void mpegts_parse_close (MpegTSContext *ts)

Variables

AVInputFormat mpegts_demuxer
AVInputFormat mpegtsraw_demuxer

Define Documentation

#define CHECK_COUNT   10

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

Definition at line 1353 of file mpegts.c.

Referenced by mpegts_raw_read_packet().

#define MAX_PES_HEADER_SIZE   (9 + 255)

Definition at line 135 of file mpegts.c.

#define MAX_PIDS_PER_PROGRAM   64

Definition at line 82 of file mpegts.c.

Referenced by add_pid_to_pmt().

#define MAX_RESYNC_SIZE   4096

Definition at line 36 of file mpegts.c.

Referenced by mpegts_resync().

#define MAX_SCAN_PACKETS   32000

Definition at line 32 of file mpegts.c.

#define PES_START_SIZE   9

Definition at line 134 of file mpegts.c.

Referenced by mpegts_push_data().

#define REGISTRATION_DESCRIPTOR   5

Definition at line 37 of file mpegts.c.

Referenced by pmt_cb().

Typedef Documentation

typedef struct MpegTSFilter MpegTSFilter

Definition at line 49 of file mpegts.c.

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

Definition at line 51 of file mpegts.c.

typedef struct PESContext PESContext

Definition at line 39 of file mpegts.c.

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

Definition at line 58 of file mpegts.c.

typedef void SetServiceCallback(void *opaque, int ret)

Definition at line 60 of file mpegts.c.

Enumeration Type Documentation

enum MpegTSFilterType

Enumerator:
MPEGTS_PES 
MPEGTS_SECTION 

Definition at line 44 of file mpegts.c.

enum MpegTSState

Enumerator:
MPEGTS_HEADER 
MPEGTS_PESHEADER_FILL 
MPEGTS_PAYLOAD 
MPEGTS_SKIP 

Definition at line 126 of file mpegts.c.

Function Documentation

static void add_pat_entry ( MpegTSContext *  ts,
unsigned int  programid 
) [static]

Definition at line 171 of file mpegts.c.

Referenced by pat_cb().

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

Definition at line 1024 of file mpegts.c.

Referenced by handle_packet(), and pmt_cb().

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

Definition at line 184 of file mpegts.c.

Referenced by pat_cb(), and pmt_cb().

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

Definition at line 350 of file mpegts.c.

Referenced by get_packet_size(), and mpegts_probe().

static void clear_program ( MpegTSContext *  ts,
unsigned int  programid 
) [static]

Definition at line 156 of file mpegts.c.

Referenced by pmt_cb().

static void clear_programs ( MpegTSContext *  ts  )  [static]

Definition at line 165 of file mpegts.c.

Referenced by mpegts_read_close(), and pat_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 210 of file mpegts.c.

Referenced by handle_packet().

static int get16 ( const uint8_t **  pp,
const uint8_t *  p_end 
) [inline, static]

Definition at line 414 of file mpegts.c.

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

static int get8 ( const uint8_t **  pp,
const uint8_t *  p_end 
) [inline, static]

Definition at line 401 of file mpegts.c.

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

static int get_packet_size ( const uint8_t *  buf,
int  size 
) [static]

Definition at line 375 of file mpegts.c.

Referenced by mpegts_read_header().

static int64_t get_pts ( const uint8_t *  p  )  [static]

Definition at line 813 of file mpegts.c.

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

Definition at line 429 of file mpegts.c.

Referenced by sdt_cb().

static void handle_packet ( MpegTSContext *  ts,
const uint8_t *  packet 
) [static]

Definition at line 1047 of file mpegts.c.

Referenced by handle_packets(), and mpegts_parse_packet().

static int handle_packets ( MpegTSContext *  ts,
int  nb_packets 
) [static]

Definition at line 1169 of file mpegts.c.

Referenced by mpegts_read_header(), and mpegts_read_packet().

static void mpegts_close_filter ( MpegTSContext *  ts,
MpegTSFilter *  filter 
) [static]

Definition at line 331 of file mpegts.c.

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

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

Definition at line 1421 of file mpegts.c.

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

Definition at line 309 of file mpegts.c.

Referenced by add_pes_stream().

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

Definition at line 277 of file mpegts.c.

Referenced by mpegts_scan_sdt(), mpegts_set_service(), and pat_cb().

void mpegts_parse_close ( MpegTSContext *  ts  ) 

Definition at line 1527 of file mpegts.c.

Referenced by rtp_parse_close().

MpegTSContext* mpegts_parse_open ( AVFormatContext *  s  ) 

Definition at line 1486 of file mpegts.c.

Referenced by rtp_parse_open().

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

Definition at line 1502 of file mpegts.c.

Referenced by rtp_parse_packet().

static int mpegts_probe ( AVProbeData *  p  )  [static]

Definition at line 1192 of file mpegts.c.

static void mpegts_push_data ( MpegTSFilter *  filter,
const uint8_t *  buf,
int  buf_size,
int  is_start,
int64_t  pos 
) [static]

Definition at line 822 of file mpegts.c.

Referenced by add_pes_stream().

static int mpegts_raw_read_packet ( AVFormatContext *  s,
AVPacket *  pkt 
) [static]

Definition at line 1355 of file mpegts.c.

static int mpegts_read_close ( AVFormatContext *  s  )  [static]

Definition at line 1408 of file mpegts.c.

static int mpegts_read_header ( AVFormatContext *  s,
AVFormatParameters *  ap 
) [static]

Definition at line 1251 of file mpegts.c.

static int mpegts_read_packet ( AVFormatContext *  s,
AVPacket *  pkt 
) [static]

Definition at line 1399 of file mpegts.c.

static int mpegts_resync ( ByteIOContext *  pb  )  [static]

Definition at line 1125 of file mpegts.c.

Referenced by read_packet().

static void mpegts_scan_sdt ( MpegTSContext *  ts  )  [static]

Definition at line 807 of file mpegts.c.

Referenced by mpegts_read_header().

static void mpegts_set_service ( MpegTSContext *  ts  )  [static]

Definition at line 722 of file mpegts.c.

Referenced by mpegts_read_header().

static AVStream * new_pes_av_stream ( PESContext *  pes,
uint32_t  code 
) [static]

Definition at line 948 of file mpegts.c.

Referenced by mpegts_push_data(), and pmt_cb().

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

Definition at line 1224 of file mpegts.c.

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

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

Definition at line 451 of file mpegts.c.

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

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

Definition at line 676 of file mpegts.c.

Referenced by mpegts_set_service().

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

Definition at line 481 of file mpegts.c.

Referenced by pat_cb().

static int read_packet ( ByteIOContext *  pb,
uint8_t *  buf,
int  raw_packet_size 
) [static]

Definition at line 1143 of file mpegts.c.

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

Definition at line 1460 of file mpegts.c.

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

Definition at line 728 of file mpegts.c.

Referenced by mpegts_scan_sdt().

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

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

Definition at line 239 of file mpegts.c.

Referenced by handle_packet().

Variable Documentation

AVInputFormat mpegts_demuxer

Initial value:

 {
    "mpegts",
    NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
    sizeof(MpegTSContext),
    mpegts_probe,
    mpegts_read_header,
    mpegts_read_packet,
    mpegts_read_close,
    read_seek,
    mpegts_get_pcr,
    .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
}

Definition at line 1536 of file mpegts.c.

AVInputFormat mpegtsraw_demuxer

Initial value:

 {
    "mpegtsraw",
    NULL_IF_CONFIG_SMALL("MPEG-2 raw transport stream format"),
    sizeof(MpegTSContext),
    NULL,
    mpegts_read_header,
    mpegts_raw_read_packet,
    mpegts_read_close,
    read_seek,
    mpegts_get_pcr,
    .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
}

Definition at line 1549 of file mpegts.c.

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