Windows Television (WTV) demuxer. More...

#include <inttypes.h>
#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/intfloat.h"
#include "libavutil/mem.h"
#include "avformat.h"
#include "avio_internal.h"
#include "demux.h"
#include "internal.h"
#include "wtv.h"
#include "mpegts.h"

Data Structures
struct	WtvFile

struct	WtvStream

struct	WtvContext

Macros
#define	PRI_PRETTY_GUID "%08"PRIx32"-%04"PRIx16"-%04"PRIx16"-%02x%02x%02x%02x%02x%02x%02x%02x"

#define	ARG_PRETTY_GUID(g)

#define	LEN_PRETTY_GUID 35

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

Enumerations
enum	{ SEEK_TO_DATA = 0 , SEEK_TO_PTS }

Functions
static int64_t	seek_by_sector (AVIOContext *pb, int64_t sector, int64_t offset)

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 (unsigned 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 (const AVProbeData *p)

static int64_t	crazytime_to_avtime (int64_t value)
	Convert crazy time (100ns since 1 Jan 0001) to av time (unix timestamp in microseconds)

static int64_t	oledate_to_avtime (int64_t value)
	Convert OLE DATE to av time (unix timestamp in microseconds)

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, uint64_t size)
	parse Media Type structure and populate stream

static int	recover (WtvContext *wtv, uint64_t broken_pos)
	Try to seek over a broken chunk.

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

const FFInputFormat	ff_wtv_demuxer

Detailed Description

Windows Television (WTV) demuxer.

Author: Peter Ross pross.nosp@m.@xvi.nosp@m.d.org

Definition in file wtvdec.c.

Macro Definition Documentation

◆ PRI_PRETTY_GUID

#define PRI_PRETTY_GUID "%08"PRIx32"-%04"PRIx16"-%04"PRIx16"-%02x%02x%02x%02x%02x%02x%02x%02x"

Definition at line 42 of file wtvdec.c.

Referenced by get_tag().

◆ ARG_PRETTY_GUID

#define ARG_PRETTY_GUID ( g )

Value:

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]

AV_RL32

#define AV_RL32(p)

Definition intreadwrite.h:419

AV_RL16

#define AV_RL16(p)

Definition intreadwrite.h:405

g

const char * g

Definition vf_curves.c:128

Definition at line 44 of file wtvdec.c.

Referenced by get_tag().

◆ LEN_PRETTY_GUID

#define LEN_PRETTY_GUID 35

Definition at line 46 of file wtvdec.c.

Referenced by get_tag().

◆ wtvfile_open

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

Value:

wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))

s

#define s(width, name)

Definition cbs_vp9.c:198

wtvfile_open2

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

Open file using filename.

Definition wtvdec.c:257

Definition at line 302 of file wtvdec.c.

Referenced by read_header().

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
SEEK_TO_DATA
SEEK_TO_PTS

Definition at line 708 of file wtvdec.c.

Function Documentation

◆ seek_by_sector()

static int64_t seek_by_sector	(	AVIOContext *	pb,
		int64_t	sector,
		int64_t	offset )

static

Definition at line 64 of file wtvdec.c.

Referenced by read_header(), wtvfile_open_sector(), wtvfile_read_packet(), and wtvfile_seek().

◆ wtvfile_read_packet()

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

static

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

Definition at line 72 of file wtvdec.c.

Referenced by wtvfile_open_sector().

◆ wtvfile_seek()

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

static

Returns: position (or file length)

Definition at line 110 of file wtvdec.c.

Referenced by wtvfile_open_sector().

◆ read_ints()

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 136 of file wtvdec.c.

Referenced by wtvfile_open_sector().

◆ wtvfile_open_sector()

static AVIOContext * wtvfile_open_sector	(	unsigned	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 153 of file wtvdec.c.

Referenced by wtvfile_open2().

◆ wtvfile_open2()

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 257 of file wtvdec.c.

◆ wtvfile_close()

static void wtvfile_close ( AVIOContext * pb )

static

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

Definition at line 308 of file wtvdec.c.

Referenced by read_close(), and read_header().

◆ read_probe()

static int read_probe ( const AVProbeData * p )

static

Definition at line 380 of file wtvdec.c.

◆ crazytime_to_avtime()

static int64_t crazytime_to_avtime ( int64_t value )

static

Convert crazy time (100ns since 1 Jan 0001) to av time (unix timestamp in microseconds)

Definition at line 388 of file wtvdec.c.

Referenced by get_tag().

◆ oledate_to_avtime()

static int64_t oledate_to_avtime ( int64_t value )

static

Convert OLE DATE to av time (unix timestamp in microseconds)

Definition at line 396 of file wtvdec.c.

Referenced by get_tag().

◆ get_attachment()

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

static

Definition at line 401 of file wtvdec.c.

Referenced by get_tag().

◆ get_tag()

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

static

Definition at line 429 of file wtvdec.c.

Referenced by parse_legacy_attrib().

◆ parse_legacy_attrib()

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().

◆ parse_videoinfoheader2()

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().

◆ parse_mpeg1waveformatex()

static void parse_mpeg1waveformatex ( AVStream * st )

static

Parse MPEG1WAVEFORMATEX extradata structure.

Definition at line 533 of file wtvdec.c.

Referenced by parse_media_type().

◆ new_stream()

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 560 of file wtvdec.c.

Referenced by parse_media_type().

◆ parse_media_type()

static AVStream * parse_media_type	(	AVFormatContext *	s,
		AVStream *	st,
		int	sid,
		ff_asf_guid	mediatype,
		ff_asf_guid	subtype,
		ff_asf_guid	formattype,
		uint64_t	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 594 of file wtvdec.c.

Referenced by parse_chunks(), and parse_media_type().

◆ recover()

static int recover	(	WtvContext *	wtv,
		uint64_t	broken_pos )

static

Try to seek over a broken chunk.

Returns: <0 on error

Definition at line 717 of file wtvdec.c.

Referenced by parse_chunks(), and read_part_of_packet().

◆ parse_chunks()

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 740 of file wtvdec.c.

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

◆ read_header()

static int read_header ( AVFormatContext * s )

static

Definition at line 925 of file wtvdec.c.

◆ read_packet()

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

static

Definition at line 1025 of file wtvdec.c.

◆ read_seek()

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

static

Definition at line 1044 of file wtvdec.c.

◆ read_close()

static int read_close ( AVFormatContext * s )

static

Definition at line 1084 of file wtvdec.c.

Variable Documentation

◆ EVENTID_SubtitleSpanningEvent

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 339 of file wtvdec.c.

Referenced by parse_chunks().

◆ EVENTID_LanguageSpanningEvent

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 341 of file wtvdec.c.

Referenced by parse_chunks().

◆ EVENTID_AudioDescriptorSpanningEvent

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 343 of file wtvdec.c.

Referenced by parse_chunks().

◆ EVENTID_CtxADescriptorSpanningEvent

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 345 of file wtvdec.c.

Referenced by parse_chunks().

◆ EVENTID_CSDescriptorSpanningEvent

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 347 of file wtvdec.c.

Referenced by parse_chunks().

◆ EVENTID_DVBScramblingControlSpanningEvent

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 349 of file wtvdec.c.

Referenced by parse_chunks().

◆ EVENTID_StreamIDSpanningEvent

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 351 of file wtvdec.c.

Referenced by parse_chunks().

◆ EVENTID_TeletextSpanningEvent

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 353 of file wtvdec.c.

Referenced by parse_chunks().

◆ EVENTID_AudioTypeSpanningEvent

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 355 of file wtvdec.c.

Referenced by parse_chunks().

◆ mediasubtype_mpeg1payload

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 361 of file wtvdec.c.

Referenced by parse_media_type().

◆ mediatype_mpeg2_sections

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 363 of file wtvdec.c.

Referenced by parse_media_type().

◆ mediatype_mpeg2_pes

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 365 of file wtvdec.c.

Referenced by parse_media_type().

◆ mediatype_mstvcaption

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 367 of file wtvdec.c.

Referenced by parse_media_type().

◆ mediasubtype_dvb_subtitle

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 371 of file wtvdec.c.

Referenced by parse_media_type().

◆ mediasubtype_teletext

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 373 of file wtvdec.c.

Referenced by parse_media_type().

◆ mediasubtype_dtvccdata

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 375 of file wtvdec.c.

Referenced by parse_media_type().

◆ mediasubtype_mpeg2_sections

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 377 of file wtvdec.c.

Referenced by parse_media_type().

◆ ff_wtv_demuxer

const FFInputFormat ff_wtv_demuxer

Initial value:

= {
    .p.name         = "wtv",
    .p.long_name    = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
    .p.flags        = AVFMT_SHOW_IDS,
    .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,
}

Definition at line 1092 of file wtvdec.c.

Data Structures

Macros

Enumerations

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ PRI_PRETTY_GUID

◆ ARG_PRETTY_GUID

◆ LEN_PRETTY_GUID

◆ wtvfile_open

Enumeration Type Documentation

◆ anonymous enum

Function Documentation

◆ seek_by_sector()

◆ wtvfile_read_packet()

◆ wtvfile_seek()

◆ read_ints()

◆ wtvfile_open_sector()

◆ wtvfile_open2()

◆ wtvfile_close()

◆ read_probe()

◆ crazytime_to_avtime()

◆ oledate_to_avtime()

◆ get_attachment()

◆ get_tag()

◆ parse_legacy_attrib()

◆ parse_videoinfoheader2()

◆ parse_mpeg1waveformatex()

◆ new_stream()

◆ parse_media_type()

◆ recover()

◆ parse_chunks()

◆ read_header()

◆ read_packet()

◆ read_seek()

◆ read_close()

Variable Documentation

◆ EVENTID_SubtitleSpanningEvent

◆ EVENTID_LanguageSpanningEvent

◆ EVENTID_AudioDescriptorSpanningEvent

◆ EVENTID_CtxADescriptorSpanningEvent

◆ EVENTID_CSDescriptorSpanningEvent

◆ EVENTID_DVBScramblingControlSpanningEvent

◆ EVENTID_StreamIDSpanningEvent

◆ EVENTID_TeletextSpanningEvent

◆ EVENTID_AudioTypeSpanningEvent

◆ mediasubtype_mpeg1payload

◆ mediatype_mpeg2_sections

◆ mediatype_mpeg2_pes

◆ mediatype_mstvcaption

◆ mediasubtype_dvb_subtitle

◆ mediasubtype_teletext

◆ mediasubtype_dtvccdata

◆ mediasubtype_mpeg2_sections

◆ ff_wtv_demuxer