import"filtersession.idl";

Collaboration diagram for JSFSFilter:

Public Member Functions
boolean	is_destroyed ()

FilterProperty	ipid_props (unsigned long idx, DOMString name)

void	ipid_props (unsigned long idx, function fun_callback)

FilterProperty	opid_props (unsigned long idx, DOMString name)

void	opid_props (unsigned long idx, function fun_callback)

Object	ipid_stats (unsigned long idx, optional unsigned int mode=0)

Object	opid_stats (unsigned long idx, optional unsigned int mode=0)

Array	compute_link (unsigned long idx, DOMString description, optional Boolean load_args=false)

JSFSFilter	ipid_source (unsigned long idx)

Array	opid_sinks (unsigned long idx)

Array	all_args (optional boolean value_only=true)

FilterProperty	get_arg (DOMString arg_name)

void	update (DOMString arg_name, DOMString arg_val, unsigned int propagate_mask=0)

void	remove ()

void	insert (DOMString filter_to_add, optional DOMString link_args=null)

void	bind (Object obj)

void	lock (boolean do_lock)

Data Fields
attribute readonly DOMString	name

attribute readonly DOMString	ID

attribute readonly DOMString	type

attribute readonly unsigned long	nb_ipid

attribute readonly unsigned long	nb_opid

attribute readonly DOMString	status

attribute readonly boolean	alias

attribute readonly DOMString	args

attribute readonly boolean	dynamic

attribute readonly boolean	done

attribute readonly unsigned long long	time

attribute readonly unsigned long long	pck_done

attribute readonly unsigned long long	bytes_done

attribute readonly unsigned long long	pck_sent

attribute readonly unsigned long long	pck_ifce_sent

attribute readonly unsigned long long	bytes_sent

attribute readonly unsigned long	tasks

attribute readonly unsigned long	errors

attribute readonly boolean	report_updated

attribute readonly DOMString	class

attribute readonly DOMString	streamtype

attribute readonly DOMString	codec

attribute DOMString	iname

attribute boolean	event_target

attribute Fraction	last_ts_sent

attribute Fraction	last_ts_drop

Detailed Description

The JSFSFilter interface provides tools to query and update filters in a session. It implements binding to the underlying filter object, see GF_Filter.

Member Function Documentation

◆ is_destroyed()

boolean JSFSFilter::is_destroyed ( )

Checks if a filter is valid or if it has been destroyed. Any query on a destroyed filter will raise an exception.

Returns: true if the filter has been destroyed, false otherwise

◆ ipid_props() [1/2]

FilterProperty JSFSFilter::ipid_props	(	unsigned long	idx,
		DOMString	name
	)

Gets properties on input pid This function accepts the following extra names (not property names) to query PID status:

buffer: return the PID buffer level in microsecond
buffer_total: return the cumulated buffer from source to PID level in microsecond
name: return the PID name
eos: return true if PID is in EOS state

Parameters

idx	the index of the input pid to query
name	name of the property to query

Returns: property value, or null if not found

◆ ipid_props() [2/2]

void JSFSFilter::ipid_props	(	unsigned long	idx,
		function	fun_callback
	)

Enumerates properties on input pid

Parameters

idx	the index of the input pid to query
fun_callback	function called for each property in the input pid. The function has three parameters: name (DOMString), type (DOMString), value (FilterProperty)

◆ opid_props() [1/2]

FilterProperty JSFSFilter::opid_props	(	unsigned long	idx,
		DOMString	name
	)

Gets properties on output pid

Parameters

idx	the index of the output pid to query
name	name of the property to query

Returns: property value, or null if not found

◆ opid_props() [2/2]

void JSFSFilter::opid_props	(	unsigned long	idx,
		function	fun_callback
	)

Enumerates properties on output pid

Parameters

idx	the index of the output pid to query
fun_callback	function called for each property in the output pid. The function has three parameters: name (DOMString), type (DOMString), value (FilterProperty)

◆ ipid_stats()

Object JSFSFilter::ipid_stats	(	unsigned long	idx,
		optional unsigned int	mode = `0`
	)

get statistics on input pid

Parameters

idx	the index of the input pid to query
mode	mode used to query stats - cf GF_FilterPidStatsLocation

Returns: object matching GF_FilterPidStatistics

◆ opid_stats()

Object JSFSFilter::opid_stats	(	unsigned long	idx,
		optional unsigned int	mode = `0`
	)

get statistics on output pid

Parameters

idx	the index of the output pid to query
mode	mode used to query stats - cf GF_FilterPidStatsLocation

Returns: object matching GF_FilterPidStatistics

◆ compute_link()

Array JSFSFilter::compute_link	(	unsigned long	idx,
		DOMString	description,
		optional Boolean	load_args = `false`
	)

computes link from an output pid of the filter to a given filter description

Parameters

idx	the index of the output pid to query
description	filter descrition, destination can be specified using dst=URL
load_args	if set, will load all possible arguments for each filter

If arguments are loaded, the return value is an array of object with property fname set to the registry name and args set to an array of JSFSFilterArg, including arguments of meta filters (not visible otherwise)

If arguments are not loaded, the return value is an array registry names

Returns: array of found filters, NULL if not found

◆ ipid_source()

JSFSFilter JSFSFilter::ipid_source ( unsigned long idx )

Gets source filter for an input pid

Parameters

idx	the index of the input pid to query

Returns: input filter or null

◆ opid_sinks()

Array JSFSFilter::opid_sinks ( unsigned long idx )

Gets destination filter(s) for an output pid

Parameters

idx	the index of the output pid to query

Returns: array of output filters

◆ all_args()

Array JSFSFilter::all_args ( optional boolean value_only = true )

Gets all arguments (options) of the filter

Parameters

value_only if true, only returns name (DOMString) and value (FilterProperty) of each argument. Otherwise returns the full argument (JSFSFilterArg)

Returns: array of JSFSFilterArg

◆ get_arg()

FilterProperty JSFSFilter::get_arg ( DOMString arg_name )

Gets value of a given argument of the filter

Parameters

arg_name argument name

Returns: property value, or null

◆ update()

void JSFSFilter::update	(	DOMString	arg_name,
		DOMString	arg_val,
		unsigned int	propagate_mask = `0`
	)

sends argument update to filter

Parameters

arg_name	name of argument to update
arg_val	value of argument to update. Can be a string or a native type which will be serialized based on the argument type
propagate_mask	flags indicating if updates must be send to up-chain filters (2), down-chain filters (1), both (3) or only on filter (0)

◆ remove()

void JSFSFilter::remove ( )

removes filter from graph

◆ insert()

void JSFSFilter::insert	(	DOMString	filter_to_add,
		optional DOMString	link_args = `null`
	)

inserts a filter in graph linked to the current filter

Parameters

filter_to_add	string describing the filter to add, can be in the form "src=" for sources, "dst=" for sinks or regular string for filters.
link_args	specify any additional arguments to pass to the SID option of the new filter - see gf_filter_set_source

◆ bind()

void JSFSFilter::bind ( Object obj )

binds a JSObject with underlying filter javascript extensions, if any. Currently only dashin filter has such an extension (see JSDASHClient). This will throw an exception if failure or no JS binding available

Parameters

obj	the JS object to use as interface for the underlying filter script

◆ lock()

void JSFSFilter::lock ( boolean do_lock )

locks a filter. This should only be used when updating sync arguments of the filter - see gf_filter_lock.

Parameters

do_lock if true, locks the filter global mutex, otherwise unlocks it.

Field Documentation

◆ name

attribute readonly DOMString JSFSFilter::name

filter name - may be changed at run-time by the filter

◆ ID

attribute readonly DOMString JSFSFilter::ID

filter ID - cannot be modified by filter, but may be null

◆ type

attribute readonly DOMString JSFSFilter::type

filter registry name

◆ nb_ipid

attribute readonly unsigned long JSFSFilter::nb_ipid

number of input PIDs for the filter

◆ nb_opid

attribute readonly unsigned long JSFSFilter::nb_opid

number of output PIDs for the filter

◆ status

attribute readonly DOMString JSFSFilter::status

status string of the filter, or null

◆ alias

attribute readonly boolean JSFSFilter::alias

set to true if the filter is an alias filter (should be ignored)

◆ args

attribute readonly DOMString JSFSFilter::args

set to the arguments passed to the filter, null if none

◆ dynamic

attribute readonly boolean JSFSFilter::dynamic

set to true if filter was dynamically loaded during graph resolution, false if filter was explicitly loaded by user/app

◆ done

attribute readonly boolean JSFSFilter::done

set to true if filter is done processing and will soon be removed

◆ time

attribute readonly unsigned long long JSFSFilter::time

time in microseconds the filter has been running

◆ pck_done

attribute readonly unsigned long long JSFSFilter::pck_done

number of input packets received

◆ bytes_done

attribute readonly unsigned long long JSFSFilter::bytes_done

number of input bytes received

◆ pck_sent

attribute readonly unsigned long long JSFSFilter::pck_sent

number of packets sent

◆ pck_ifce_sent

attribute readonly unsigned long long JSFSFilter::pck_ifce_sent

number of frame interfaces packets sent

◆ bytes_sent

attribute readonly unsigned long long JSFSFilter::bytes_sent

number of bytes sent

◆ tasks

attribute readonly unsigned long JSFSFilter::tasks

number of tasks executed

◆ errors

attribute readonly unsigned long JSFSFilter::errors

number of errors

◆ report_updated

attribute readonly boolean JSFSFilter::report_updated

set to true if report has been updated since last query

◆ class

attribute readonly DOMString JSFSFilter::class

class of filter, can be "rawin", "demuxer", "decoder", "encoder", "muxer", "rawout", "mediasink", "mediasource", "unknown"

◆ streamtype

attribute readonly DOMString JSFSFilter::streamtype

stream type (audio, visual, ...)

◆ codec

attribute readonly DOMString JSFSFilter::codec

codec name or null if unknown

◆ iname

attribute DOMString JSFSFilter::iname

internal name - this can only be set and modified by this JS and allows for filter identification from JS

◆ event_target

attribute boolean JSFSFilter::event_target

set to true if filter accepts user events

◆ last_ts_sent

attribute Fraction JSFSFilter::last_ts_sent

set to max timestamp of last packet sent by the filter, or null if not available

◆ last_ts_drop

attribute Fraction JSFSFilter::last_ts_drop

set to max timestamp of last packet dropped by the filter, or null if not available

Public Member Functions

Data Fields

Detailed Description

Member Function Documentation

◆ is_destroyed()

◆ ipid_props() [1/2]

◆ ipid_props() [2/2]

◆ opid_props() [1/2]

◆ opid_props() [2/2]

◆ ipid_stats()

◆ opid_stats()

◆ compute_link()

◆ ipid_source()

◆ opid_sinks()

◆ all_args()

◆ get_arg()

◆ update()

◆ remove()

◆ insert()

◆ bind()

◆ lock()

Field Documentation

◆ name

◆ ID

◆ type

◆ nb_ipid

◆ nb_opid

◆ status

◆ alias

◆ args

◆ dynamic

◆ done

◆ time

◆ pck_done

◆ bytes_done

◆ pck_sent

◆ pck_ifce_sent

◆ bytes_sent

◆ tasks

◆ errors

◆ report_updated

◆ class

◆ streamtype

◆ codec

◆ iname

◆ event_target

◆ last_ts_sent

◆ last_ts_drop