WebVTT parsing

Helper functions for WebVTT parsing. More...

Collaboration diagram for WebVTT parsing:

Data Structures
struct	GF_WebVTTTimestamp
struct	GF_WebVTTCue

Enumerations
enum	GF_WebVTTCuePropertyType {   WEBVTT_ID , WEBVTT_SETTINGS , WEBVTT_PAYLOAD , WEBVTT_POSTCUE_TEXT ,   WEBVTT_PRECUE_TEXT }

Functions
u64	gf_webvtt_timestamp_get (GF_WebVTTTimestamp *wvtt_ts)
void	gf_webvtt_timestamp_set (GF_WebVTTTimestamp *wvtt_ts, u64 value)
void	gf_webvtt_timestamp_dump (GF_WebVTTTimestamp *wvtt_ts, FILE *dump, Bool dump_hour)
void	gf_webvtt_cue_del (GF_WebVTTCue *cue)
GF_Err	gf_webvtt_dump_header_boxed (FILE *dump, const u8 *data, u32 dataLength, u32 *printLength)
GF_List *	gf_webvtt_parse_cues_from_data (const u8 *data, u32 dataLength, u64 start, u64 end)

Detailed Description

This section documents the audio and video parsing functions of the GPAC framework.

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Data Structure Documentation

GF_WebVTTTimestamp

struct GF_WebVTTTimestamp

WebVTT timestamp information

Data Fields
u32	hour
u32	min
u32	sec
u32	ms

GF_WebVTTCue

struct GF_WebVTTCue

WebVTT cue structure

Collaboration diagram for GF_WebVTTCue:

Data Fields
GF_WebVTTTimestamp	start
GF_WebVTTTimestamp	end
char *	id
char *	settings
char *	text
char *	pre_text
char *	post_text
Bool	split
GF_WebVTTTimestamp	orig_start
GF_WebVTTTimestamp	orig_end

Enumeration Type Documentation

GF_WebVTTCuePropertyType

enum GF_WebVTTCuePropertyType

WebVTT types

Enumerator
WEBVTT_ID
WEBVTT_SETTINGS
WEBVTT_PAYLOAD
WEBVTT_POSTCUE_TEXT
WEBVTT_PRECUE_TEXT

Function Documentation

gf_webvtt_timestamp_get()

u64 gf_webvtt_timestamp_get

(

GF_WebVTTTimestamp *

wvtt_ts

)

gets webvtt timestamp

Parameters

wvtt_ts

the target WebVTT timestamp

Returns

timestamp in millisecond

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gf_webvtt_timestamp_set()

void gf_webvtt_timestamp_set	(	GF_WebVTTTimestamp *	wvtt_ts,
		u64	value
	)

sets webvtt timestamp

Parameters

wvtt_ts	the target WebVTT timestamp
value	timestamp in millisecond

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gf_webvtt_timestamp_dump()

void gf_webvtt_timestamp_dump	(	GF_WebVTTTimestamp *	wvtt_ts,
		FILE *	dump,
		Bool	dump_hour
	)

dumps webvtt timestamp

Parameters

wvtt_ts	the target WebVTT timestamp
dump	the output file to write to
dump_hour	if GF_TRUE, dumps hours

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gf_webvtt_cue_del()

void gf_webvtt_cue_del

(

GF_WebVTTCue *

cue

)

destroys a WebVTT cue

Parameters

cue	the target WebVTT cue

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gf_webvtt_dump_header_boxed()

GF_Err gf_webvtt_dump_header_boxed	(	FILE *	dump,
		const u8 *	data,
		u32	dataLength,
		u32 *	printLength
	)

dumps webvtt sample boxes

Parameters

dump	the output file to write to
data	the WebVTT ISOBMFF sample payload
dataLength	the size of the payload in bytes
printLength	set to the printed size in bytes

Returns

error if any

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gf_webvtt_parse_cues_from_data()

GF_List* gf_webvtt_parse_cues_from_data	(	const u8 *	data,
		u32	dataLength,
		u64	start,
		u64	end
	)

dumps webvtt sample boxes

Parameters

data	the WebVTT ISOBMFF sample payload
dataLength	the size of the payload in bytes
start	the start time in milliseconds of the WebVTT cue
end	the end time in milliseconds of the WebVTT cue

Returns

new list of cues, to destroy by caller

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