Compositor API

GPAC Compositor and Scene API. More...

Collaboration diagram for Compositor API:

Data Structures
interface	JSScene
interface	GPACEventFilter
interface	GPACEVT
interface	MediaObject
interface	SRDDesc
interface	QualityDesc

Detailed Description

This section documents the API used to access and control the compositor and scene media objects when using interactive BIFS/VRML/X3D/SVG rendering. This API is not loaded by default when playing a scene and shall be loaded by a scene script using:

import {scene} from 'scenejs'

This API cannot be loaded from a JSFilter. It exports:

• a single object "scene", instance of JSScene class.
• a single object "session", instance of JSFilterSession class.

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Data Structure Documentation

GPACEVT

interface GPACEVT

interface to user event - see GF_Event

Data Fields
readonly atttribute unsigned long	type	event type - see GF_Event
readonly atttribute DOMString	name	event name - see gf_dom_event_get_name
readonly atttribute unsigned long	mouse_x	mouse X position
readonly atttribute unsigned long	mouse_y	mouse Y position
readonly atttribute boolean	picked	true if a node is currently picked
readonly atttribute double	wheel	mouse wheel position
readonly atttribute unsigned long	button	mouse button see GF_EventMouse
readonly atttribute unsigned long	keycode
readonly atttribute unsigned long	hwkey	hardware key code
readonly atttribute DOMString	url	target URL for navigation events
readonly atttribute Array	dropfiles	array of file paths to open in drop operation

SRDDesc

interface SRDDesc

spatial relationship descriptor

Data Fields
unsigned long	x	x position
unsigned long	h	y position height
unsigned long	w	width

QualityDesc

interface QualityDesc

quality descriptor

Data Fields
attributeDOMString	ID	quality ID
DOMString	mime	mime type
DOMString	codec	codec parameter
unsigned long	width	pixel width
unsigned long	height	pixel heigth
unsigned long	bandwidth	quality rate in bps
boolean	interlaced	interlaced video
double	fps	video FPS
unsigned long	samplerate	audio sample rate
unsigned long	channels	number of audio channels
unsigned long	par_num	numerator of pixel aspect ratio
unsigned long	par_den	denominator of pixel aspect ratio
boolean	disabled	quality is disabled
boolean	is_selected	quality is selected
boolean	automatic	automatic rate adaptation is enabled
unsigned long	tile_mode	tile adaptation mode - see GF_DASHTileAdaptationMode
unsigned long	dependent_groups	number of dependent groups for this quality