CustomFilter Interface Reference

import"nodejs.idl";

Collaboration diagram for CustomFilter:

Public Member Functions
GF_Err	configure_pid (_FilterPid pid, boolean is_remove)
GF_Err	process ()
boolean	process_event (_FilterEvent event)
GF_Err	reconfigure_output (_FilterPid *opid)
void	push_cap (DOMString pcode, PropertyValue prop, unsigned long flag, unsigned long priority=0, unsigned long custom_type=0)
_FilterPid	new_pid ()
void	update_status (DOMString status, unsigned long percent=0)
void	reschedule (unsigned long when=0)
void	notify_failure (GF_Err err, unsigned long error_type=GF_SETUP_ERROR)
void	make_sticky ()
void	prevent_blocking (boolean enable)
void	block_eos (boolean enable)
void	set_max_pids (long max_pids)
void	hint_clock (unsigned long long clock_us, nFraction media_time)

Data Fields
attribute readonly boolean	block_enabled
attribute readonly unsigned long	output_buffer
attribute readonly unsigned long	playout_buffer
attribute readonly boolean	sinks_done
attribute readonly unsigned long	nb_evts_queued
attribute readonly unsigned long long	clock_hint_time
attribute readonly nFraction	clock_hint_mediatime
attribute readonly boolean	connections_pending

Detailed Description

Custom filter object

Member Function Documentation

configure_pid()

GF_Err CustomFilter::configure_pid	(	_FilterPid	pid,
		boolean	is_remove
	)

callback used whenever a new filter pid is configured, initially set to null

Parameters

pid	the PID to configure
is_remove	set to true if PID is being removed

Returns

error code

Warning

the return value SHALL be set

process()

GF_Err CustomFilter::process

(

)

callback used by the filter to process data, initially set to null

Returns

error code

Warning

the return value SHALL be set

process_event()

boolean CustomFilter::process_event

(

_FilterEvent

event

)

callback used whenever a new filter is added, initially set to null

Parameters

event

the event being processed (read-only)

Returns

true to cancel the event, false otherwise

Warning

the return value SHALL be set

reconfigure_output()

GF_Err CustomFilter::reconfigure_output

(

_FilterPid *

opid

)

callback used whenever an output pid is to be reconfigured (capability negotiation), initially set to null

Parameters

opid	the filter output pid to reconfigure

Returns

error if any, usualy GF_NOT_SUPPORTED if capability cannot be changed

Warning

the return value SHALL be set

push_cap()

void CustomFilter::push_cap	(	DOMString	pcode,
		PropertyValue	prop,
		unsigned long	flag,
		unsigned long	priority = 0,
		unsigned long	custom_type = 0
	)

push a capability in the current capability bundle - see gf_filter_push_caps

Parameters

pcode	capability name
prop	capability value
flag	capability flags (input, output, etc)
priority	capability priority
custom_type	type of property if user-defined property. If not set and user-defined, property is a string

new_pid()

_FilterPid CustomFilter::new_pid

(

)

create a new output pid for this filter - see gf_filter_pid_new

Returns

_FilterPid object

update_status()

void CustomFilter::update_status	(	DOMString	status,
		unsigned long	percent = 0
	)

update filter status - see gf_filter_update_status

Parameters

status	status
percent	progress in per 10000

reschedule()

void CustomFilter::reschedule

(

unsigned long

when = 0

)

reschedule the filter after a given delay - see gf_filter_ask_rt_reschedule and gf_filter_post_process_task

Parameters

when	delay in microseconds

notify_failure()

void CustomFilter::notify_failure	(	GF_Err	err,
		unsigned long	error_type = GF_SETUP_ERROR
	)

notify an internal failure of the filter has happend - see gf_filter_notification_failure and gf_filter_setup_failure

Parameters

err	the failure reason (gpac error code, int)
error_type	the failure notification type. Can be one of: GF_SETUP_ERROR: notification is a setup error, the filter chain was never connected GF_NOTIF_ERROR: notification is an error but keep the filter chain connected GF_NOTIF_ERROR_AND_DISCONNECT: notification is an error and disconnect the filter chain

make_sticky()

void CustomFilter::make_sticky

(

)

make the filter sticky - see gf_filter_make_sticky

prevent_blocking()

void CustomFilter::prevent_blocking

(

boolean

enable

)

prevent blocking on the filter - see gf_filter_prevent_blocking

Parameters

enable

if true, blocking prevention is enabled

block_eos()

void CustomFilter::block_eos

(

boolean

enable

)

block eos signaling on the filter - see gf_filter_block_eos

Parameters

enable

if true, eos blocking is enabled

set_max_pids()

void CustomFilter::set_max_pids

(

long

max_pids

)

set maximum number of extra pids accepted by this filter - see gf_filter_set_max_extra_input_pids

Parameters

max_pids

number of extra pids, -1 for no limits

hint_clock()

void CustomFilter::hint_clock	(	unsigned long long	clock_us,
		nFraction	media_time
	)

set clock hint - see gf_filter_hint_single_clock

Parameters

clock_us	clock in microseconds
media_time	media time as nFraction

Field Documentation

block_enabled

attribute readonly boolean CustomFilter::block_enabled

filter blocking is enabled - see gf_filter_block_enabled

output_buffer

attribute readonly unsigned long CustomFilter::output_buffer

maximum output buffer time - see gf_filter_get_output_buffer_max

playout_buffer

attribute readonly unsigned long CustomFilter::playout_buffer

maximum plyaout buffer time - see gf_filter_get_output_buffer_max

sinks_done

attribute readonly boolean CustomFilter::sinks_done

all sinks are done for this filter - see gf_filter_all_sinks_done

nb_evts_queued

attribute readonly unsigned long CustomFilter::nb_evts_queued

number of queued events on the filter - see gf_filter_get_num_events_queued

clock_hint_time

attribute readonly unsigned long long CustomFilter::clock_hint_time

clock hint value in microseconds - see gf_filter_get_clock_hint

clock_hint_mediatime

attribute readonly nFraction CustomFilter::clock_hint_mediatime

clock hint media time as fraction - see gf_filter_get_clock_hint

connections_pending

attribute readonly boolean CustomFilter::connections_pending

indicating connections are pending on the filter, readonly - see gf_filter_connections_pending