4xm.c File Reference

4X Technologies file demuxer by Mike Melanson (melan.nosp@m.son@.nosp@m.pcisy.nosp@m.s.ne.nosp@m.t) for more information on the .4xm file format, visit: http://www.pcisys.net/~melanson/codecs/ More...

#include "libavutil/intreadwrite.h"
#include "libavutil/intfloat.h"
#include "libavcodec/internal.h"
#include "avformat.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	AudioTrack
struct	FourxmDemuxContext

Macros
#define	RIFF_TAG   MKTAG('R', 'I', 'F', 'F')
#define	FOURXMV_TAG   MKTAG('4', 'X', 'M', 'V')
#define	LIST_TAG   MKTAG('L', 'I', 'S', 'T')
#define	HEAD_TAG   MKTAG('H', 'E', 'A', 'D')
#define	TRK__TAG   MKTAG('T', 'R', 'K', '_')
#define	MOVI_TAG   MKTAG('M', 'O', 'V', 'I')
#define	VTRK_TAG   MKTAG('V', 'T', 'R', 'K')
#define	STRK_TAG   MKTAG('S', 'T', 'R', 'K')
#define	std__TAG   MKTAG('s', 't', 'd', '_')
#define	name_TAG   MKTAG('n', 'a', 'm', 'e')
#define	vtrk_TAG   MKTAG('v', 't', 'r', 'k')
#define	strk_TAG   MKTAG('s', 't', 'r', 'k')
#define	ifrm_TAG   MKTAG('i', 'f', 'r', 'm')
#define	pfrm_TAG   MKTAG('p', 'f', 'r', 'm')
#define	cfrm_TAG   MKTAG('c', 'f', 'r', 'm')
#define	ifr2_TAG   MKTAG('i', 'f', 'r', '2')
#define	pfr2_TAG   MKTAG('p', 'f', 'r', '2')
#define	cfr2_TAG   MKTAG('c', 'f', 'r', '2')
#define	snd__TAG   MKTAG('s', 'n', 'd', '_')
#define	vtrk_SIZE   0x44
#define	strk_SIZE   0x28
#define	GET_LIST_HEADER()

Functions
static int	fourxm_probe (AVProbeData *p)
static int	parse_vtrk (AVFormatContext *s, FourxmDemuxContext *fourxm, uint8_t *buf, int size, int left)
static int	parse_strk (AVFormatContext *s, FourxmDemuxContext *fourxm, uint8_t *buf, int size, int left)
static int	fourxm_read_header (AVFormatContext *s)
static int	fourxm_read_packet (AVFormatContext *s, AVPacket *pkt)
static int	fourxm_read_close (AVFormatContext *s)

Variables
AVInputFormat	ff_fourxm_demuxer

Detailed Description

4X Technologies file demuxer by Mike Melanson (melan.nosp@m.son@.nosp@m.pcisy.nosp@m.s.ne.nosp@m.t) for more information on the .4xm file format, visit: http://www.pcisys.net/~melanson/codecs/

Definition in file 4xm.c.

Macro Definition Documentation

RIFF_TAG

#define RIFF_TAG   MKTAG('R', 'I', 'F', 'F')

Definition at line 36 of file 4xm.c.

Referenced by fourxm_probe().

FOURXMV_TAG

#define FOURXMV_TAG   MKTAG('4', 'X', 'M', 'V')

Definition at line 37 of file 4xm.c.

Referenced by fourxm_probe().

LIST_TAG

#define LIST_TAG   MKTAG('L', 'I', 'S', 'T')

Definition at line 38 of file 4xm.c.

Referenced by fourxm_read_packet().

HEAD_TAG

#define HEAD_TAG   MKTAG('H', 'E', 'A', 'D')

Definition at line 39 of file 4xm.c.

Referenced by fourxm_read_header().

TRK__TAG

#define TRK__TAG   MKTAG('T', 'R', 'K', '_')

Definition at line 40 of file 4xm.c.

MOVI_TAG

#define MOVI_TAG   MKTAG('M', 'O', 'V', 'I')

Definition at line 41 of file 4xm.c.

Referenced by fourxm_read_header().

VTRK_TAG

#define VTRK_TAG   MKTAG('V', 'T', 'R', 'K')

Definition at line 42 of file 4xm.c.

STRK_TAG

#define STRK_TAG   MKTAG('S', 'T', 'R', 'K')

Definition at line 43 of file 4xm.c.

std__TAG

#define std__TAG   MKTAG('s', 't', 'd', '_')

Definition at line 44 of file 4xm.c.

Referenced by fourxm_read_header().

name_TAG

#define name_TAG   MKTAG('n', 'a', 'm', 'e')

Definition at line 45 of file 4xm.c.

vtrk_TAG

#define vtrk_TAG   MKTAG('v', 't', 'r', 'k')

Definition at line 46 of file 4xm.c.

Referenced by fourxm_read_header().

strk_TAG

#define strk_TAG   MKTAG('s', 't', 'r', 'k')

Definition at line 47 of file 4xm.c.

Referenced by fourxm_read_header().

ifrm_TAG

#define ifrm_TAG   MKTAG('i', 'f', 'r', 'm')

Definition at line 48 of file 4xm.c.

Referenced by fourxm_read_packet().

pfrm_TAG

#define pfrm_TAG   MKTAG('p', 'f', 'r', 'm')

Definition at line 49 of file 4xm.c.

Referenced by fourxm_read_packet().

cfrm_TAG

#define cfrm_TAG   MKTAG('c', 'f', 'r', 'm')

Definition at line 50 of file 4xm.c.

Referenced by fourxm_read_packet().

ifr2_TAG

#define ifr2_TAG   MKTAG('i', 'f', 'r', '2')

Definition at line 51 of file 4xm.c.

Referenced by fourxm_read_packet().

pfr2_TAG

#define pfr2_TAG   MKTAG('p', 'f', 'r', '2')

Definition at line 52 of file 4xm.c.

Referenced by fourxm_read_packet().

cfr2_TAG

#define cfr2_TAG   MKTAG('c', 'f', 'r', '2')

Definition at line 53 of file 4xm.c.

Referenced by fourxm_read_packet().

snd__TAG

#define snd__TAG   MKTAG('s', 'n', 'd', '_')

Definition at line 54 of file 4xm.c.

Referenced by fourxm_read_packet().

vtrk_SIZE

#define vtrk_SIZE   0x44

Definition at line 56 of file 4xm.c.

Referenced by parse_vtrk().

strk_SIZE

#define strk_SIZE   0x28

Definition at line 57 of file 4xm.c.

Referenced by parse_strk().

GET_LIST_HEADER

#define GET_LIST_HEADER

(

)

Value:

fourcc_tag = avio_rl32(pb); \
    size       = avio_rl32(pb); \
    if (fourcc_tag != LIST_TAG) \
        return AVERROR_INVALIDDATA; \
    fourcc_tag = avio_rl32(pb);

Definition at line 59 of file 4xm.c.

Referenced by fourxm_read_header().

Function Documentation

fourxm_probe()

static int fourxm_probe ( AVProbeData *  p )

static

Definition at line 84 of file 4xm.c.

parse_vtrk()

static int parse_vtrk ( AVFormatContext *  s, FourxmDemuxContext *  fourxm, uint8_t *  buf, int  size, int  left  )

static

Definition at line 93 of file 4xm.c.

Referenced by fourxm_read_header().

parse_strk()

static int parse_strk ( AVFormatContext *  s, FourxmDemuxContext *  fourxm, uint8_t *  buf, int  size, int  left  )

static

Definition at line 127 of file 4xm.c.

Referenced by fourxm_read_header().

fourxm_read_header()

static int fourxm_read_header ( AVFormatContext *  s )

static

Definition at line 206 of file 4xm.c.

fourxm_read_packet()

static int fourxm_read_packet ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 287 of file 4xm.c.

fourxm_read_close()

static int fourxm_read_close ( AVFormatContext *  s )

static

Definition at line 379 of file 4xm.c.

Variable Documentation

ff_fourxm_demuxer

AVInputFormat ff_fourxm_demuxer

Initial value:

= {
    .name           = "4xm",
    .long_name      = NULL_IF_CONFIG_SMALL("4X Technologies"),
    .priv_data_size = sizeof(FourxmDemuxContext),
    .read_probe     = fourxm_probe,
    .read_header    = fourxm_read_header,
    .read_packet    = fourxm_read_packet,
    .read_close     = fourxm_read_close,
}

Definition at line 388 of file 4xm.c.