ty.c File Reference

#include "libavutil/attributes.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "avformat.h"
#include "demux.h"
#include "internal.h"
#include "mpeg.h"

Go to the source code of this file.

Data Structures
struct	TyRecHdr
struct	TYDemuxContext

Macros
#define	SERIES1_PES_LENGTH   11 /* length of audio PES hdr on S1 */
#define	SERIES2_PES_LENGTH   16 /* length of audio PES hdr on S2 */
#define	AC3_PES_LENGTH   14 /* length of audio PES hdr for AC3 */
#define	VIDEO_PES_LENGTH   16 /* length of video PES header */
#define	DTIVO_PTS_OFFSET   6 /* offs into PES for MPEG PTS on DTivo */
#define	SA_PTS_OFFSET   9 /* offset into PES for MPEG PTS on SA */
#define	AC3_PTS_OFFSET   9 /* offset into PES for AC3 PTS on DTivo */
#define	VIDEO_PTS_OFFSET   9 /* offset into PES for video PTS on all */
#define	AC3_PKT_LENGTH   1536 /* size of TiVo AC3 pkts (w/o PES hdr) */
#define	TIVO_PES_FILEID   0xf5467abd
#define	CHUNK_SIZE   (128 * 1024)
#define	CHUNK_PEEK_COUNT   3 /* number of chunks to probe */

Enumerations
enum	TiVo_type { TIVO_TYPE_UNKNOWN , TIVO_TYPE_SA , TIVO_TYPE_DTIVO }
enum	TiVo_series { TIVO_SERIES_UNKNOWN , TIVO_SERIES1 , TIVO_SERIES2 }
enum	TiVo_audio { TIVO_AUDIO_UNKNOWN , TIVO_AUDIO_AC3 , TIVO_AUDIO_MPEG }

Functions
static int	ty_probe (const AVProbeData *p)
static TyRecHdr *	parse_chunk_headers (const uint8_t *buf, int num_recs)
static int	find_es_header (const uint8_t *header, const uint8_t *buffer, int search_len)
static int	analyze_chunk (AVFormatContext *s, const uint8_t *chunk)
static int	ty_read_header (AVFormatContext *s)
static int	get_chunk (AVFormatContext *s)
static int	demux_video (AVFormatContext *s, TyRecHdr *rec_hdr, AVPacket *pkt)
static int	check_sync_pes (AVFormatContext *s, AVPacket *pkt, int32_t offset, int32_t rec_len)
static int	demux_audio (AVFormatContext *s, TyRecHdr *rec_hdr, AVPacket *pkt)
static int	ty_read_packet (AVFormatContext *s, AVPacket *pkt)
static int	ty_read_close (AVFormatContext *s)

Variables
static const uint8_t	ty_VideoPacket [] = { 0x00, 0x00, 0x01, 0xe0 }
static const uint8_t	ty_MPEGAudioPacket [] = { 0x00, 0x00, 0x01, 0xc0 }
static const uint8_t	ty_AC3AudioPacket [] = { 0x00, 0x00, 0x01, 0xbd }
const FFInputFormat	ff_ty_demuxer

Macro Definition Documentation

SERIES1_PES_LENGTH

#define SERIES1_PES_LENGTH   11 /* length of audio PES hdr on S1 */

Definition at line 34 of file ty.c.

Referenced by analyze_chunk().

SERIES2_PES_LENGTH

#define SERIES2_PES_LENGTH   16 /* length of audio PES hdr on S2 */

Definition at line 35 of file ty.c.

Referenced by analyze_chunk().

AC3_PES_LENGTH

#define AC3_PES_LENGTH   14 /* length of audio PES hdr for AC3 */

Definition at line 36 of file ty.c.

Referenced by analyze_chunk().

VIDEO_PES_LENGTH

#define VIDEO_PES_LENGTH   16 /* length of video PES header */

Definition at line 37 of file ty.c.

Referenced by demux_video().

DTIVO_PTS_OFFSET

#define DTIVO_PTS_OFFSET   6 /* offs into PES for MPEG PTS on DTivo */

Definition at line 38 of file ty.c.

Referenced by analyze_chunk().

SA_PTS_OFFSET

#define SA_PTS_OFFSET   9 /* offset into PES for MPEG PTS on SA */

Definition at line 39 of file ty.c.

Referenced by analyze_chunk(), and demux_audio().

AC3_PTS_OFFSET

#define AC3_PTS_OFFSET   9 /* offset into PES for AC3 PTS on DTivo */

Definition at line 40 of file ty.c.

Referenced by analyze_chunk().

VIDEO_PTS_OFFSET

#define VIDEO_PTS_OFFSET   9 /* offset into PES for video PTS on all */

Definition at line 41 of file ty.c.

Referenced by demux_video().

AC3_PKT_LENGTH

#define AC3_PKT_LENGTH   1536 /* size of TiVo AC3 pkts (w/o PES hdr) */

Definition at line 42 of file ty.c.

Referenced by demux_audio().

TIVO_PES_FILEID

#define TIVO_PES_FILEID   0xf5467abd

Definition at line 48 of file ty.c.

Referenced by analyze_chunk(), get_chunk(), and ty_probe().

CHUNK_SIZE

#define CHUNK_SIZE   (128 * 1024)

Definition at line 49 of file ty.c.

CHUNK_PEEK_COUNT

#define CHUNK_PEEK_COUNT   3 /* number of chunks to probe */

Definition at line 50 of file ty.c.

Referenced by ty_read_header().

Enumeration Type Documentation

TiVo_type

enum TiVo_type

Enumerator
TIVO_TYPE_UNKNOWN
TIVO_TYPE_SA
TIVO_TYPE_DTIVO

Definition at line 60 of file ty.c.

TiVo_series

enum TiVo_series

Enumerator
TIVO_SERIES_UNKNOWN
TIVO_SERIES1
TIVO_SERIES2

Definition at line 66 of file ty.c.

TiVo_audio

enum TiVo_audio

Enumerator
TIVO_AUDIO_UNKNOWN
TIVO_AUDIO_AC3
TIVO_AUDIO_MPEG

Definition at line 72 of file ty.c.

Function Documentation

ty_probe()

static int ty_probe ( const AVProbeData * p )

static

Definition at line 104 of file ty.c.

parse_chunk_headers()

static TyRecHdr * parse_chunk_headers ( const uint8_t * buf, int num_recs )

static

Definition at line 119 of file ty.c.

Referenced by analyze_chunk(), and get_chunk().

find_es_header()

static int find_es_header ( const uint8_t * header, const uint8_t * buffer, int search_len )

static

Definition at line 158 of file ty.c.

Referenced by analyze_chunk(), demux_audio(), and demux_video().

analyze_chunk()

static int analyze_chunk ( AVFormatContext * s, const uint8_t * chunk )

static

Definition at line 170 of file ty.c.

Referenced by ty_read_header().

ty_read_header()

static int ty_read_header ( AVFormatContext * s )

static

Definition at line 281 of file ty.c.

get_chunk()

static int get_chunk ( AVFormatContext * s )

static

Definition at line 337 of file ty.c.

Referenced by get_chunk(), and ty_read_packet().

demux_video()

static int demux_video ( AVFormatContext * s, TyRecHdr * rec_hdr, AVPacket * pkt )

static

Definition at line 390 of file ty.c.

Referenced by ty_read_packet().

check_sync_pes()

static int check_sync_pes ( AVFormatContext * s, AVPacket * pkt, int32_t offset, int32_t rec_len )

static

Definition at line 480 of file ty.c.

Referenced by demux_audio().

demux_audio()

static int demux_audio ( AVFormatContext * s, TyRecHdr * rec_hdr, AVPacket * pkt )

static

Definition at line 518 of file ty.c.

Referenced by ty_read_packet().

ty_read_packet()

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

static

Definition at line 660 of file ty.c.

ty_read_close()

static int ty_read_close ( AVFormatContext * s )

static

Definition at line 712 of file ty.c.

Variable Documentation

ty_VideoPacket

const uint8_t ty_VideoPacket[] = { 0x00, 0x00, 0x01, 0xe0 }

static

Definition at line 44 of file ty.c.

Referenced by demux_video().

ty_MPEGAudioPacket

const uint8_t ty_MPEGAudioPacket[] = { 0x00, 0x00, 0x01, 0xc0 }

static

Definition at line 45 of file ty.c.

Referenced by analyze_chunk(), and demux_audio().

ty_AC3AudioPacket

const uint8_t ty_AC3AudioPacket[] = { 0x00, 0x00, 0x01, 0xbd }

static

Definition at line 46 of file ty.c.

Referenced by demux_audio().

ff_ty_demuxer

const FFInputFormat ff_ty_demuxer

Initial value:

= {
    .p.name         = "ty",
    .p.long_name    = NULL_IF_CONFIG_SMALL("TiVo TY Stream"),
    .p.extensions   = "ty,ty+",
    .p.flags        = AVFMT_TS_DISCONT,
    .priv_data_size = sizeof(TYDemuxContext),
    .read_probe     = ty_probe,
    .read_header    = ty_read_header,
    .read_packet    = ty_read_packet,
    .read_close     = ty_read_close,
}

Definition at line 721 of file ty.c.