libavformat/wtvdec.c File Reference

Windows Television (WTV) demuxer. More...

#include "libavutil/intreadwrite.h"
#include "libavutil/intfloat.h"
#include "avformat.h"
#include "internal.h"
#include "wtv.h"
#include "mpegts.h"
#include <strings.h>

Go to the source code of this file.

Data Structures

struct WtvFile

struct WtvStream

struct WtvContext

Defines

#define PRI_PRETTY_GUID   "%08x-%04x-%04x-%02x%02x%02x%02x%02x%02x%02x%02x"

#define ARG_PRETTY_GUID(g)   AV_RL32(g),AV_RL16(g+4),AV_RL16(g+6),g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15]

#define LEN_PRETTY_GUID   34

#define wtvfile_open(s, buf, buf_size, filename)   wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))

Enumerations

enum { SEEK_TO_DATA = 0, SEEK_TO_PTS }

Functions

static int wtvfile_read_packet (void *opaque, uint8_t *buf, int buf_size)

static int64_t wtvfile_seek (void *opaque, int64_t offset, int whence)

static int read_ints (AVIOContext *pb, uint32_t *data, int count)

read non-zero integers (le32) from input stream

static AVIOContext * wtvfile_open_sector (int first_sector, uint64_t length, int depth, AVFormatContext *s)

Open file.

static AVIOContext * wtvfile_open2 (AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)

Open file using filename.

static void wtvfile_close (AVIOContext *pb)

Close file opened with wtvfile_open_sector(), or wtv_open().

static int read_probe (AVProbeData *p)

static void filetime_to_iso8601 (char *buf, int buf_size, int64_t value)

Convert win32 FILETIME to ISO-8601 string.

static void crazytime_to_iso8601 (char *buf, int buf_size, int64_t value)

Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string.

static int oledate_to_iso8601 (char *buf, int buf_size, int64_t value)

Convert OLE DATE to ISO-8601 string.

static void get_attachment (AVFormatContext *s, AVIOContext *pb, int length)

static void get_tag (AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)

static void parse_legacy_attrib (AVFormatContext *s, AVIOContext *pb)

Parse metadata entries.

static int parse_videoinfoheader2 (AVFormatContext *s, AVStream *st)

parse VIDEOINFOHEADER2 structure

static void parse_mpeg1waveformatex (AVStream *st)

Parse MPEG1WAVEFORMATEX extradata structure.

static AVStream * new_stream (AVFormatContext *s, AVStream *st, int sid, int codec_type)

Initialise stream.

static AVStream * parse_media_type (AVFormatContext *s, AVStream *st, int sid, ff_asf_guid mediatype, ff_asf_guid subtype, ff_asf_guid formattype, int size)

parse Media Type structure and populate stream

static int parse_chunks (AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)

Parse WTV chunks.

static int read_header (AVFormatContext *s)

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

static int read_seek (AVFormatContext *s, int stream_index, int64_t ts, int flags)

static int read_close (AVFormatContext *s)

Variables

static const ff_asf_guid EVENTID_SubtitleSpanningEvent

static const ff_asf_guid EVENTID_LanguageSpanningEvent

static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent

static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent

static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent

static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent

static const ff_asf_guid EVENTID_StreamIDSpanningEvent

static const ff_asf_guid EVENTID_TeletextSpanningEvent

static const ff_asf_guid EVENTID_AudioTypeSpanningEvent

static const ff_asf_guid mediasubtype_mpeg1payload

static const ff_asf_guid mediatype_mpeg2_sections

static const ff_asf_guid mediatype_mpeg2_pes

static const ff_asf_guid mediatype_mstvcaption

static const ff_asf_guid mediasubtype_dvb_subtitle

static const ff_asf_guid mediasubtype_teletext

static const ff_asf_guid mediasubtype_dtvccdata

static const ff_asf_guid mediasubtype_mpeg2_sections

static const ff_asf_guid format_videoinfo2

AVInputFormat ff_wtv_demuxer

Detailed Description

Windows Television (WTV) demuxer.

Author:: Peter Ross <pross@xvid.org>

Definition in file wtvdec.c.

Define Documentation

#define ARG_PRETTY_GUID ( g ) AV_RL32(g),AV_RL16(g+4),AV_RL16(g+6),g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15]

Definition at line 39 of file wtvdec.c.

Referenced by get_tag().

#define LEN_PRETTY_GUID 34

Definition at line 41 of file wtvdec.c.

Referenced by get_tag().

#define PRI_PRETTY_GUID "%08x-%04x-%04x-%02x%02x%02x%02x%02x%02x%02x%02x"

Definition at line 37 of file wtvdec.c.

Referenced by get_tag().

#define wtvfile_open	(	s,
		buf,
		buf_size,
		filename	)	wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))

Definition at line 280 of file wtvdec.c.

Referenced by read_header().

Enumeration Type Documentation

anonymous enum

Enumerator:

SEEK_TO_DATA
SEEK_TO_PTS

Definition at line 699 of file wtvdec.c.

Function Documentation

static void crazytime_to_iso8601	(	char *	buf,
		int	buf_size,
		int64_t	value
	)			`[static]`

Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string.

Definition at line 381 of file wtvdec.c.

Referenced by get_tag().

static void filetime_to_iso8601	(	char *	buf,
		int	buf_size,
		int64_t	value
	)			`[static]`

Convert win32 FILETIME to ISO-8601 string.

Definition at line 372 of file wtvdec.c.

Referenced by get_tag().

static void get_attachment	(	AVFormatContext *	s,
		AVIOContext *	pb,
		int	length
	)			`[static]`

Definition at line 401 of file wtvdec.c.

Referenced by get_tag().

static void get_tag	(	AVFormatContext *	s,
		AVIOContext *	pb,
		const char *	key,
		int	type,
		int	length
	)			`[static]`

Definition at line 434 of file wtvdec.c.

static AVStream* new_stream	(	AVFormatContext *	s,
		AVStream *	st,
		int	sid,
		int	codec_type
	)			`[static]`

Initialise stream.

Parameters:

st

Stream to initialise, or NULL to create and initialise new stream

Returns:: NULL on error

Definition at line 556 of file wtvdec.c.

Referenced by parse_media_type().

static int oledate_to_iso8601	(	char *	buf,
		int	buf_size,
		int64_t	value
	)			`[static]`

Convert OLE DATE to ISO-8601 string.

Returns:: <0 on error

Definition at line 391 of file wtvdec.c.

Referenced by get_tag().

static int parse_chunks	(	AVFormatContext *	s,
		int	mode,
		int64_t	seekts,
		int *	len_ptr
	)			`[static]`

Parse WTV chunks.

Parameters:

	mode	SEEK_TO_DATA or SEEK_TO_PTS
	seekts	timestamp
`[out]`	len_ptr	Length of data chunk

Returns:: stream index of data chunk, or <0 on error

Definition at line 711 of file wtvdec.c.

Referenced by read_header(), read_packet(), and read_seek().

static void parse_legacy_attrib	(	AVFormatContext *	s,
		AVIOContext *	pb
	)			`[static]`

Parse metadata entries.

Definition at line 492 of file wtvdec.c.

Referenced by read_header().

static AVStream* parse_media_type	(	AVFormatContext *	s,
		AVStream *	st,
		int	sid,
		ff_asf_guid	mediatype,
		ff_asf_guid	subtype,
		ff_asf_guid	formattype,
		int	size
	)			`[static]`

parse Media Type structure and populate stream

Parameters:

	st	Stream, or NULL to create new stream
	mediatype	Mediatype GUID
	subtype	Subtype GUID
	formattype	Format GUID
	size	Size of format buffer

Returns:: NULL on error

Definition at line 588 of file wtvdec.c.

Referenced by parse_chunks().

static void parse_mpeg1waveformatex ( AVStream * st ) [static]

Parse MPEG1WAVEFORMATEX extradata structure.

Definition at line 533 of file wtvdec.c.

Referenced by parse_media_type().

static int parse_videoinfoheader2	(	AVFormatContext *	s,
		AVStream *	st
	)			`[static]`

parse VIDEOINFOHEADER2 structure

Returns:: bytes consumed

Definition at line 519 of file wtvdec.c.

Referenced by parse_media_type().

static int read_close ( AVFormatContext * s ) [static]

Definition at line 1024 of file wtvdec.c.

static int read_header ( AVFormatContext * s ) [static]

Definition at line 873 of file wtvdec.c.

static int read_ints	(	AVIOContext *	pb,
		uint32_t *	data,
		int	count
	)			`[static]`

read non-zero integers (le32) from input stream

Parameters:

	pb
`[out]`	data	destination
	count	maximum number of integers to read

Returns:: total number of integers read

Definition at line 129 of file wtvdec.c.

Referenced by wtvfile_open_sector().

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

Definition at line 965 of file wtvdec.c.

static int read_probe ( AVProbeData * p ) [static]

Definition at line 364 of file wtvdec.c.

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

Definition at line 984 of file wtvdec.c.

static void wtvfile_close ( AVIOContext * pb ) [static]

Close file opened with wtvfile_open_sector(), or wtv_open().

Definition at line 286 of file wtvdec.c.

Referenced by read_close(), and read_header().

static AVIOContext* wtvfile_open2	(	AVFormatContext *	s,
		const uint8_t *	buf,
		int	buf_size,
		const uint8_t *	filename,
		int	filename_size
	)			`[static]`

Open file using filename.

Parameters:

`[in]`	buf	directory buffer
	buf_size	directory buffer size
`[in]`	filename
	filename_size	size of filename

Returns:: NULL on error

Definition at line 245 of file wtvdec.c.

static AVIOContext* wtvfile_open_sector	(	int	first_sector,
		uint64_t	length,
		int	depth,
		AVFormatContext *	s
	)			`[static]`

Open file.

Parameters:

	first_sector	First sector
	length	Length of file (bytes)
	depth	File allocation table depth

Returns:: NULL on error

Definition at line 146 of file wtvdec.c.

Referenced by wtvfile_open2().

static int wtvfile_read_packet	(	void *	opaque,
		uint8_t *	buf,
		int	buf_size
	)			`[static]`

Returns:: bytes read, 0 on end of file, or <0 on error

Definition at line 64 of file wtvdec.c.

Referenced by wtvfile_open_sector().

static int64_t wtvfile_seek	(	void *	opaque,
		int64_t	offset,
		int	whence
	)			`[static]`

Returns:: position (or file length)

Definition at line 103 of file wtvdec.c.

Referenced by wtvfile_open_sector().

Variable Documentation

const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent [static]

Initial value:

    {0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E}

Definition at line 323 of file wtvdec.c.

Referenced by parse_chunks().

const ff_asf_guid EVENTID_AudioTypeSpanningEvent [static]

Initial value:

    {0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3}

Definition at line 335 of file wtvdec.c.

Referenced by parse_chunks().

const ff_asf_guid EVENTID_CSDescriptorSpanningEvent [static]

Initial value:

    {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66}

Definition at line 327 of file wtvdec.c.

Referenced by parse_chunks().

const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent [static]

Initial value:

    {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24}

Definition at line 325 of file wtvdec.c.

Referenced by parse_chunks().

const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent [static]

Initial value:

    {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B}

Definition at line 329 of file wtvdec.c.

Referenced by parse_chunks().

const ff_asf_guid EVENTID_LanguageSpanningEvent [static]

Initial value:

    {0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95}

Definition at line 321 of file wtvdec.c.

Referenced by parse_chunks().

const ff_asf_guid EVENTID_StreamIDSpanningEvent [static]

Initial value:

    {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE}

Definition at line 331 of file wtvdec.c.

Referenced by parse_chunks().

const ff_asf_guid EVENTID_SubtitleSpanningEvent [static]

Initial value:

    {0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A}

Definition at line 319 of file wtvdec.c.

Referenced by parse_chunks().

const ff_asf_guid EVENTID_TeletextSpanningEvent [static]

Initial value:

    {0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3}

Definition at line 333 of file wtvdec.c.

Referenced by parse_chunks().

AVInputFormat ff_wtv_demuxer

Initial value:

 {
    .name           = "wtv",
    .long_name      = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
    .priv_data_size = sizeof(WtvContext),
    .read_probe     = read_probe,
    .read_header    = read_header,
    .read_packet    = read_packet,
    .read_seek      = read_seek,
    .read_close     = read_close,
    .flags          = AVFMT_SHOW_IDS,
}

Definition at line 1032 of file wtvdec.c.

const ff_asf_guid format_videoinfo2 [static]

Initial value:

    {0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA}

Definition at line 361 of file wtvdec.c.

Referenced by parse_media_type().

const ff_asf_guid mediasubtype_dtvccdata [static]

Initial value:

    {0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A}

Definition at line 355 of file wtvdec.c.

Referenced by parse_media_type().

const ff_asf_guid mediasubtype_dvb_subtitle [static]

Initial value:

    {0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F}

Definition at line 351 of file wtvdec.c.

Referenced by parse_media_type().

const ff_asf_guid mediasubtype_mpeg1payload [static]

Initial value:

    {0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70}

Definition at line 341 of file wtvdec.c.

Referenced by parse_media_type().

const ff_asf_guid mediasubtype_mpeg2_sections [static]

Initial value:

    {0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61}

Definition at line 357 of file wtvdec.c.

Referenced by parse_media_type().

const ff_asf_guid mediasubtype_teletext [static]

Initial value:

    {0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA}

Definition at line 353 of file wtvdec.c.

Referenced by parse_media_type().

const ff_asf_guid mediatype_mpeg2_pes [static]

Initial value:

    {0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}

Definition at line 345 of file wtvdec.c.

Referenced by parse_media_type().

const ff_asf_guid mediatype_mpeg2_sections [static]

Initial value:

    {0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5}

Definition at line 343 of file wtvdec.c.

Referenced by parse_media_type().

const ff_asf_guid mediatype_mstvcaption [static]

Initial value:

    {0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1}

Definition at line 347 of file wtvdec.c.

Referenced by parse_media_type().


Data Structures
struct	WtvFile
struct	WtvStream
struct	WtvContext
Defines
#define	PRI_PRETTY_GUID "%08x-%04x-%04x-%02x%02x%02x%02x%02x%02x%02x%02x"
#define	ARG_PRETTY_GUID(g) AV_RL32(g),AV_RL16(g+4),AV_RL16(g+6),g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15]
#define	LEN_PRETTY_GUID 34
#define	wtvfile_open(s, buf, buf_size, filename) wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
Enumerations
enum	{ SEEK_TO_DATA = 0, SEEK_TO_PTS }
Functions
static int	wtvfile_read_packet (void opaque, uint8_t buf, int buf_size)
static int64_t	wtvfile_seek (void *opaque, int64_t offset, int whence)
static int	read_ints (AVIOContext pb, uint32_t data, int count)
	read non-zero integers (le32) from input stream
static AVIOContext *	wtvfile_open_sector (int first_sector, uint64_t length, int depth, AVFormatContext *s)
	Open file.
static AVIOContext *	wtvfile_open2 (AVFormatContext s, const uint8_t buf, int buf_size, const uint8_t *filename, int filename_size)
	Open file using filename.
static void	wtvfile_close (AVIOContext *pb)
	Close file opened with wtvfile_open_sector(), or wtv_open().
static int	read_probe (AVProbeData *p)
static void	filetime_to_iso8601 (char *buf, int buf_size, int64_t value)
	Convert win32 FILETIME to ISO-8601 string.
static void	crazytime_to_iso8601 (char *buf, int buf_size, int64_t value)
	Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string.
static int	oledate_to_iso8601 (char *buf, int buf_size, int64_t value)
	Convert OLE DATE to ISO-8601 string.
static void	get_attachment (AVFormatContext s, AVIOContext pb, int length)
static void	get_tag (AVFormatContext s, AVIOContext pb, const char *key, int type, int length)
static void	parse_legacy_attrib (AVFormatContext s, AVIOContext pb)
	Parse metadata entries.
static int	parse_videoinfoheader2 (AVFormatContext s, AVStream st)
	parse VIDEOINFOHEADER2 structure
static void	parse_mpeg1waveformatex (AVStream *st)
	Parse MPEG1WAVEFORMATEX extradata structure.
static AVStream *	new_stream (AVFormatContext s, AVStream st, int sid, int codec_type)
	Initialise stream.
static AVStream *	parse_media_type (AVFormatContext s, AVStream st, int sid, ff_asf_guid mediatype, ff_asf_guid subtype, ff_asf_guid formattype, int size)
	parse Media Type structure and populate stream
static int	parse_chunks (AVFormatContext s, int mode, int64_t seekts, int len_ptr)
	Parse WTV chunks.
static int	read_header (AVFormatContext *s)
static int	read_packet (AVFormatContext s, AVPacket pkt)
static int	read_seek (AVFormatContext *s, int stream_index, int64_t ts, int flags)
static int	read_close (AVFormatContext *s)
Variables
static const ff_asf_guid	EVENTID_SubtitleSpanningEvent
static const ff_asf_guid	EVENTID_LanguageSpanningEvent
static const ff_asf_guid	EVENTID_AudioDescriptorSpanningEvent
static const ff_asf_guid	EVENTID_CtxADescriptorSpanningEvent
static const ff_asf_guid	EVENTID_CSDescriptorSpanningEvent
static const ff_asf_guid	EVENTID_DVBScramblingControlSpanningEvent
static const ff_asf_guid	EVENTID_StreamIDSpanningEvent
static const ff_asf_guid	EVENTID_TeletextSpanningEvent
static const ff_asf_guid	EVENTID_AudioTypeSpanningEvent
static const ff_asf_guid	mediasubtype_mpeg1payload
static const ff_asf_guid	mediatype_mpeg2_sections
static const ff_asf_guid	mediatype_mpeg2_pes
static const ff_asf_guid	mediatype_mstvcaption
static const ff_asf_guid	mediasubtype_dvb_subtitle
static const ff_asf_guid	mediasubtype_teletext
static const ff_asf_guid	mediasubtype_dtvccdata
static const ff_asf_guid	mediasubtype_mpeg2_sections
static const ff_asf_guid	format_videoinfo2
AVInputFormat	ff_wtv_demuxer