mpegts.c File Reference
#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 "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 struct MpegTSFilter MpegTSFilter
typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos)
typedef struct MpegTSPESFilter MpegTSPESFilter
typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len)
typedef void SetServiceCallback (void *opaque, int ret)
typedef struct MpegTSSectionFilter MpegTSSectionFilter
typedef struct PESContext PESContext
typedef struct SectionHeader SectionHeader

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
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.
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 uint64_t get_bits64 (GetBitContext *gb, int bits)
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.
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)
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)
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 CHECK_COUNT   10
#define MAX_LEVEL   4

Definition at line 962 of file mpegts.c.

Referenced by parse_mp4_descr().

#define MAX_MP4_DESCR_COUNT   16

Definition at line 46 of file mpegts.c.

Referenced by m4sl_cb(), and pmt_cb().

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

Definition at line 1967 of file mpegts.c.

Referenced by mpegts_raw_read_packet().

#define MAX_PES_HEADER_SIZE   (9 + 255)

Definition at line 158 of file mpegts.c.

#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_PIDS_PER_PROGRAM   64

Definition at line 87 of file mpegts.c.

Referenced by add_pid_to_pmt().

#define MAX_RESYNC_SIZE   65536

Definition at line 42 of file mpegts.c.

Referenced by mpegts_resync().

#define PES_HEADER_SIZE   9

Definition at line 157 of file mpegts.c.

Referenced by mpegts_push_data().

#define PES_START_SIZE   6

Definition at line 156 of file mpegts.c.

Referenced by mpegts_push_data(), and new_pes_packet().

Typedef Documentation

typedef struct MpegTSFilter MpegTSFilter

Definition at line 53 of file mpegts.c.

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

Definition at line 62 of file mpegts.c.

typedef struct SectionHeader SectionHeader
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 147 of file mpegts.c.

Function Documentation

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

Definition at line 199 of file mpegts.c.

Referenced by pat_cb().

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

Definition at line 938 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 212 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 381 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 184 of file mpegts.c.

Referenced by pmt_cb().

static void clear_programs ( MpegTSContext ts)
static

Definition at line 193 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 238 of file mpegts.c.

Referenced by handle_packet().

void ff_mpegts_parse_close ( MpegTSContext ts)

Definition at line 2246 of file mpegts.c.

Referenced by ff_rtp_parse_close().

MpegTSContext* ff_mpegts_parse_open ( AVFormatContext s)

Definition at line 2205 of file mpegts.c.

Referenced by ff_rtp_parse_open().

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

Definition at line 2221 of file mpegts.c.

Referenced by rtp_parse_one_packet(), and rtp_parse_packet_internal().

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
mp4_dec_config_descr_lenLength of 'mp4_dec_config_descr', or zero if not present
mp4_es_id
pid
mp4_dec_config_descr
Returns
<0 to stop processing

Definition at line 1238 of file mpegts.c.

Referenced by parse_chunks(), and pmt_cb().

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

Definition at line 445 of file mpegts.c.

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

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

Definition at line 432 of file mpegts.c.

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

static uint64_t get_bits64 ( GetBitContext gb,
int  bits 
)
static

Definition at line 663 of file mpegts.c.

Referenced by read_sl_header().

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

Definition at line 406 of file mpegts.c.

Referenced by mpegts_read_header().

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

Definition at line 460 of file mpegts.c.

Referenced by sdt_cb().

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

Definition at line 1623 of file mpegts.c.

Referenced by ff_mpegts_parse_packet(), and handle_packets().

static int handle_packets ( MpegTSContext ts,
int  nb_packets 
)
static

Definition at line 1772 of file mpegts.c.

Referenced by mpegts_read_header(), and mpegts_read_packet().

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

Definition at line 973 of file mpegts.c.

Referenced by mp4_read_iods(), and mp4_read_od().

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

Definition at line 1174 of file mpegts.c.

Referenced by ff_parse_mpeg2_descriptor().

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 1148 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 1161 of file mpegts.c.

Referenced by m4sl_cb().

static void mpegts_close_filter ( MpegTSContext ts,
MpegTSFilter filter 
)
static

Definition at line 360 of file mpegts.c.

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

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

Definition at line 565 of file mpegts.c.

Referenced by ff_parse_mpeg2_descriptor(), and mpegts_set_stream_info().

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

Definition at line 2052 of file mpegts.c.

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

Definition at line 337 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 305 of file mpegts.c.

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

static int mpegts_probe ( AVProbeData p)
static

Definition at line 1815 of file mpegts.c.

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

Definition at line 742 of file mpegts.c.

Referenced by add_pes_stream().

static int mpegts_raw_read_packet ( AVFormatContext s,
AVPacket pkt 
)
static

Definition at line 1969 of file mpegts.c.

static int mpegts_read_close ( AVFormatContext s)
static

Definition at line 2039 of file mpegts.c.

static int mpegts_read_header ( AVFormatContext s,
AVFormatParameters ap 
)
static

Definition at line 1874 of file mpegts.c.

static int mpegts_read_packet ( AVFormatContext s,
AVPacket pkt 
)
static

Definition at line 2013 of file mpegts.c.

static int mpegts_resync ( AVFormatContext s)
static

Definition at line 1725 of file mpegts.c.

Referenced by read_packet().

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

Definition at line 577 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 629 of file mpegts.c.

Referenced by mpegts_push_data(), and mpegts_read_packet().

static int parse_mp4_descr ( MP4DescrParseContext d,
int64_t  off,
int  len,
int  target_tag 
)
static

Definition at line 1104 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 1004 of file mpegts.c.

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

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

Definition at line 1058 of file mpegts.c.

Referenced by parse_mp4_descr().

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

Definition at line 1040 of file mpegts.c.

Referenced by parse_mp4_descr().

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

Definition at line 1014 of file mpegts.c.

Referenced by parse_mp4_descr().

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

Definition at line 1026 of file mpegts.c.

Referenced by parse_mp4_descr().

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

Definition at line 1071 of file mpegts.c.

Referenced by parse_mp4_descr().

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

Definition at line 1847 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 482 of file mpegts.c.

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

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

Definition at line 1504 of file mpegts.c.

Referenced by mpegts_read_header().

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

Definition at line 1363 of file mpegts.c.

Referenced by pat_cb().

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

Definition at line 1745 of file mpegts.c.

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

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

Definition at line 2177 of file mpegts.c.

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

Definition at line 676 of file mpegts.c.

Referenced by mpegts_push_data().

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

Definition at line 1546 of file mpegts.c.

Referenced by mpegts_read_header().

static void update_offsets ( AVIOContext pb,
int64_t *  off,
int *  len 
)
static
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 267 of file mpegts.c.

Referenced by handle_packet().

Variable Documentation

const StreamType DESC_types[]
static
Initial value:

Definition at line 556 of file mpegts.c.

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

Definition at line 2255 of file mpegts.c.

AVInputFormat ff_mpegtsraw_demuxer
Initial value:
{
.name = "mpegtsraw",
.long_name = NULL_IF_CONFIG_SMALL("MPEG-2 raw transport stream format"),
.priv_data_size = sizeof(MpegTSContext),
.read_timestamp = mpegts_get_pcr,
.priv_class = &mpegtsraw_class,
}

Definition at line 2271 of file mpegts.c.

const StreamType HDMV_types[]
static
const StreamType MISC_types[]
static
Initial value:
{
{ 0 },
}

Definition at line 542 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 138 of file mpegts.c.

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

Definition at line 132 of file mpegts.c.

const StreamType REGD_types[]
static
Initial value:
{
{ MKTAG('d','r','a','c'), AVMEDIA_TYPE_VIDEO, CODEC_ID_DIRAC },
{ MKTAG('A','C','-','3'), AVMEDIA_TYPE_AUDIO, CODEC_ID_AC3 },
{ MKTAG('B','S','S','D'), AVMEDIA_TYPE_AUDIO, CODEC_ID_S302M },
{ 0 },
}

Definition at line 548 of file mpegts.c.