nsvdec.c File Reference

#include "libavutil/mathematics.h"
#include "avformat.h"
#include "internal.h"
#include "riff.h"
#include "libavutil/dict.h"

Go to the source code of this file.

Data Structures
struct	NSVStream
struct	NSVContext

Macros
#define	CHECK_SUBSEQUENT_NSVS
#define	NSV_MAX_RESYNC   (500*1024)
#define	NSV_MAX_RESYNC_TRIES   300
#define	T_NSVF   MKTAG('N', 'S', 'V', 'f') /* file header */
#define	T_NSVS   MKTAG('N', 'S', 'V', 's') /* chunk header */
#define	T_TOC2   MKTAG('T', 'O', 'C', '2') /* extra index marker */
#define	T_NONE   MKTAG('N', 'O', 'N', 'E') /* null a/v 4CC */
#define	T_SUBT   MKTAG('S', 'U', 'B', 'T') /* subtitle aux data */
#define	T_ASYN   MKTAG('A', 'S', 'Y', 'N') /* async a/v aux marker */
#define	T_KEYF   MKTAG('K', 'E', 'Y', 'F') /* video keyframe aux marker (addition) */
#define	TB_NSVF   MKBETAG('N', 'S', 'V', 'f')
#define	TB_NSVS   MKBETAG('N', 'S', 'V', 's')
#define	NSV_ST_VIDEO   0
#define	NSV_ST_AUDIO   1
#define	NSV_ST_SUBT   2
#define	print_tag(str, tag, size)

Typedefs
typedef struct NSVStream	NSVStream

Enumerations
enum	NSVStatus {   NSV_UNSYNC, NSV_FOUND_NSVF, NSV_HAS_READ_NSVF, NSV_FOUND_NSVS,   NSV_HAS_READ_NSVS, NSV_FOUND_BEEF, NSV_GOT_VIDEO, NSV_GOT_AUDIO }

Functions
static int	nsv_read_chunk (AVFormatContext *s, int fill_header)
static int	nsv_resync (AVFormatContext *s)
static int	nsv_parse_NSVf_header (AVFormatContext *s, AVFormatParameters *ap)
static int	nsv_parse_NSVs_header (AVFormatContext *s, AVFormatParameters *ap)
static int	nsv_read_header (AVFormatContext *s, AVFormatParameters *ap)
static int	nsv_read_packet (AVFormatContext *s, AVPacket *pkt)
static int	nsv_read_seek (AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
static int	nsv_read_close (AVFormatContext *s)
static int	nsv_probe (AVProbeData *p)

Variables
static const AVCodecTag	nsv_codec_video_tags []
static const AVCodecTag	nsv_codec_audio_tags []
AVInputFormat	ff_nsv_demuxer

Macro Definition Documentation

#define CHECK_SUBSEQUENT_NSVS

Definition at line 29 of file nsvdec.c.

#define NSV_MAX_RESYNC   (500*1024)

Definition at line 35 of file nsvdec.c.

Referenced by nsv_resync().

#define NSV_MAX_RESYNC_TRIES   300

Definition at line 36 of file nsvdec.c.

Referenced by nsv_read_chunk(), and nsv_read_header().

#define NSV_ST_AUDIO   1

Definition at line 145 of file nsvdec.c.

Referenced by nsv_parse_NSVs_header(), and nsv_read_chunk().

#define NSV_ST_SUBT   2

Definition at line 146 of file nsvdec.c.

#define NSV_ST_VIDEO   0

Definition at line 144 of file nsvdec.c.

Referenced by nsv_parse_NSVs_header(), and nsv_read_chunk().

#define print_tag	(		str,
			tag,
			size
	)

Value:

av_dlog(NULL, "%s: tag=%c%c%c%c\n", \
            str, tag & 0xff,            \
            (tag >> 8) & 0xff,          \
            (tag >> 16) & 0xff,         \
            (tag >> 24) & 0xff);

Definition at line 219 of file nsvdec.c.

Referenced by nsv_parse_NSVs_header().

#define T_ASYN   MKTAG('A', 'S', 'Y', 'N') /* async a/v aux marker */

Definition at line 137 of file nsvdec.c.

#define T_KEYF   MKTAG('K', 'E', 'Y', 'F') /* video keyframe aux marker (addition) */

Definition at line 138 of file nsvdec.c.

#define T_NONE   MKTAG('N', 'O', 'N', 'E') /* null a/v 4CC */

Definition at line 135 of file nsvdec.c.

Referenced by nsv_parse_NSVs_header().

#define T_NSVF   MKTAG('N', 'S', 'V', 'f') /* file header */

Definition at line 132 of file nsvdec.c.

#define T_NSVS   MKTAG('N', 'S', 'V', 's') /* chunk header */

Definition at line 133 of file nsvdec.c.

#define T_SUBT   MKTAG('S', 'U', 'B', 'T') /* subtitle aux data */

Definition at line 136 of file nsvdec.c.

#define T_TOC2   MKTAG('T', 'O', 'C', '2') /* extra index marker */

Definition at line 134 of file nsvdec.c.

#define TB_NSVF   MKBETAG('N', 'S', 'V', 'f')

Definition at line 140 of file nsvdec.c.

Referenced by nsv_resync().

#define TB_NSVS   MKBETAG('N', 'S', 'V', 's')

Definition at line 141 of file nsvdec.c.

Typedef Documentation

typedef struct NSVStream NSVStream

Enumeration Type Documentation

enum NSVStatus

Enumerator:

NSV_UNSYNC
NSV_FOUND_NSVF
NSV_HAS_READ_NSVF
NSV_FOUND_NSVS
NSV_HAS_READ_NSVS
NSV_FOUND_BEEF
NSV_GOT_VIDEO
NSV_GOT_AUDIO

Definition at line 148 of file nsvdec.c.

Function Documentation

static int nsv_parse_NSVf_header ( AVFormatContext *  s, AVFormatParameters *  ap  )

static

Definition at line 272 of file nsvdec.c.

Referenced by nsv_read_header().

static int nsv_parse_NSVs_header ( AVFormatContext *  s, AVFormatParameters *  ap  )

static

Definition at line 400 of file nsvdec.c.

Referenced by nsv_read_chunk(), and nsv_read_header().

static int nsv_probe ( AVProbeData *  p )

static

Definition at line 757 of file nsvdec.c.

static int nsv_read_chunk ( AVFormatContext *  s, int  fill_header  )

static

Definition at line 557 of file nsvdec.c.

Referenced by nsv_read_header(), and nsv_read_packet().

static int nsv_read_close ( AVFormatContext *  s )

static

Definition at line 729 of file nsvdec.c.

static int nsv_read_header ( AVFormatContext *  s, AVFormatParameters *  ap  )

static

Definition at line 521 of file nsvdec.c.

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

static

Definition at line 684 of file nsvdec.c.

static int nsv_read_seek ( AVFormatContext *  s, int  stream_index, int64_t  timestamp, int  flags  )

static

Definition at line 712 of file nsvdec.c.

static int nsv_resync ( AVFormatContext *  s )

static

Definition at line 227 of file nsvdec.c.

Referenced by nsv_read_chunk(), and nsv_read_header().

Variable Documentation

AVInputFormat ff_nsv_demuxer

Initial value:

 {
    .name           = "nsv",
    .long_name      = NULL_IF_CONFIG_SMALL("Nullsoft Streaming Video"),
    .priv_data_size = sizeof(NSVContext),
    .read_probe     = nsv_probe,
    .read_header    = nsv_read_header,
    .read_packet    = nsv_read_packet,
    .read_close     = nsv_read_close,
    .read_seek      = nsv_read_seek,
}

Definition at line 796 of file nsvdec.c.

const AVCodecTag nsv_codec_audio_tags[]

static

Initial value:

 {
    { CODEC_ID_MP3,       MKTAG('M', 'P', '3', ' ') },
    { CODEC_ID_AAC,       MKTAG('A', 'A', 'C', ' ') },
    { CODEC_ID_AAC,       MKTAG('A', 'A', 'C', 'P') },
    { CODEC_ID_SPEEX,     MKTAG('S', 'P', 'X', ' ') },
    { CODEC_ID_PCM_U16LE, MKTAG('P', 'C', 'M', ' ') },
    { CODEC_ID_NONE,      0 },
}

Definition at line 207 of file nsvdec.c.

const AVCodecTag nsv_codec_video_tags[]

static

Initial value:

 {
    { CODEC_ID_VP3, MKTAG('V', 'P', '3', ' ') },
    { CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },
    { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },
    { CODEC_ID_VP5, MKTAG('V', 'P', '5', ' ') },
    { CODEC_ID_VP5, MKTAG('V', 'P', '5', '0') },
    { CODEC_ID_VP6, MKTAG('V', 'P', '6', ' ') },
    { CODEC_ID_VP6, MKTAG('V', 'P', '6', '0') },
    { CODEC_ID_VP6, MKTAG('V', 'P', '6', '1') },
    { CODEC_ID_VP6, MKTAG('V', 'P', '6', '2') },

    { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') }, 
    { CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', '3') },
    { CODEC_ID_NONE, 0 },
}

Definition at line 188 of file nsvdec.c.