wtvdec.c File Reference

Windows Television (WTV) demuxer. More...

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

Go to the source code of this file.

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)   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 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 More...
static AVIOContext *	wtvfile_open_sector (int first_sector, uint64_t length, int depth, AVFormatContext *s)
	Open file. More...
static AVIOContext *	wtvfile_open2 (AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size)
	Open file using filename. More...
static void	wtvfile_close (AVIOContext *pb)
	Close file opened with wtvfile_open_sector(), or wtv_open() More...
static int	read_probe (AVProbeData *p)
static int	filetime_to_iso8601 (char *buf, int buf_size, int64_t value)
	Convert win32 FILETIME to ISO-8601 string. More...
static int	crazytime_to_iso8601 (char *buf, int buf_size, int64_t value)
	Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string. More...
static int	oledate_to_iso8601 (char *buf, int buf_size, int64_t value)
	Convert OLE DATE to ISO-8601 string. More...
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. More...
static int	parse_videoinfoheader2 (AVFormatContext *s, AVStream *st)
	parse VIDEOINFOHEADER2 structure More...
static void	parse_mpeg1waveformatex (AVStream *st)
	Parse MPEG1WAVEFORMATEX extradata structure. More...
static AVStream *	new_stream (AVFormatContext *s, AVStream *st, int sid, int codec_type)
	Initialise stream. More...
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 More...
static int	recover (WtvContext *wtv, uint64_t broken_pos)
	Try to seek over a broken chunk. More...
static int	parse_chunks (AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
	Parse WTV chunks. More...
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
AVInputFormat	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

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

Definition at line 40 of file wtvdec.c.

Referenced by get_tag().

#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 42 of file wtvdec.c.

Referenced by get_tag().

#define LEN_PRETTY_GUID   34

Definition at line 44 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 296 of file wtvdec.c.

Referenced by read_header().

Enumeration Type Documentation

anonymous enum

Enumerator
SEEK_TO_DATA
SEEK_TO_PTS

Definition at line 751 of file wtvdec.c.

Function Documentation

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

static

Definition at line 62 of file wtvdec.c.

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

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 70 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 109 of file wtvdec.c.

Referenced by wtvfile_open_sector().

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 135 of file wtvdec.c.

Referenced by wtvfile_open_sector().

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 152 of file wtvdec.c.

Referenced by 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 256 of file wtvdec.c.

static void wtvfile_close ( AVIOContext *  pb )

static

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

Definition at line 302 of file wtvdec.c.

Referenced by read_close(), and read_header().

static int read_probe ( AVProbeData *  p )

static

Definition at line 374 of file wtvdec.c.

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

static

Convert win32 FILETIME to ISO-8601 string.

Returns

<0 on error

Definition at line 383 of file wtvdec.c.

Referenced by get_tag().

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

static

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

Returns

<0 on error

Definition at line 399 of file wtvdec.c.

Referenced by get_tag().

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 415 of file wtvdec.c.

Referenced by get_tag().

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

static

Definition at line 427 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 463 of file wtvdec.c.

Referenced by parse_legacy_attrib().

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

static

Parse metadata entries.

Definition at line 535 of file wtvdec.c.

Referenced by read_header().

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

static

parse VIDEOINFOHEADER2 structure

Returns

bytes consumed

Definition at line 562 of file wtvdec.c.

Referenced by parse_media_type().

static void parse_mpeg1waveformatex ( AVStream *  st )

static

Parse MPEG1WAVEFORMATEX extradata structure.

Definition at line 576 of file wtvdec.c.

Referenced by parse_media_type().

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 605 of file wtvdec.c.

Referenced by 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 639 of file wtvdec.c.

Referenced by parse_chunks().

static int recover ( WtvContext *  wtv, uint64_t  broken_pos  )

static

Try to seek over a broken chunk.

Returns

<0 on error

Definition at line 760 of file wtvdec.c.

Referenced by parse_chunks(), and read_part_of_packet().

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 783 of file wtvdec.c.

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

static int read_header ( AVFormatContext *  s )

static

Definition at line 957 of file wtvdec.c.

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

static

Definition at line 1054 of file wtvdec.c.

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

static

Definition at line 1073 of file wtvdec.c.

static int read_close ( AVFormatContext *  s )

static

Definition at line 1113 of file wtvdec.c.

Variable Documentation

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 333 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 335 of file wtvdec.c.

Referenced by parse_chunks().

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 337 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 339 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 341 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 343 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 345 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 347 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 349 of file wtvdec.c.

Referenced by parse_chunks().

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 355 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 357 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 359 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 361 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 365 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 367 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 369 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 371 of file wtvdec.c.

Referenced by parse_media_type().

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 1121 of file wtvdec.c.