<?xml version="1.0" encoding="UTF-8" ?>
<class name="AudioEffectInstance" inherits="RefCounted" api_type="core" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
	<brief_description>
		Manipulates the audio it receives for a given effect.
	</brief_description>
	<description>
		An audio effect instance manipulates the audio it receives for a given effect. This instance is automatically created by an [AudioEffect] when it is added to a bus, and should usually not be created directly. If necessary, it can be fetched at run-time with [method AudioServer.get_bus_effect_instance].
	</description>
	<tutorials>
		<link title="Audio buses">$DOCS_URL/tutorials/audio/audio_buses.html</link>
		<link title="Audio effects">$DOCS_URL/tutorials/audio/audio_effects.html</link>
	</tutorials>
	<methods>
		<method name="_process" qualifiers="virtual required">
			<return type="void" />
			<param index="0" name="src_buffer" type="const void*" />
			<param index="1" name="r_dst_buffer" type="AudioFrame*" />
			<param index="2" name="frame_count" type="int" />
			<description>
				Called by the [AudioServer] to process this effect. When [method _process_silence] is not overridden or it returns [code]false[/code], this method is called only when the bus is active.
				[b]Note:[/b] It is not useful to override this method in GDScript or C#. Only GDExtension can take advantage of it.
			</description>
		</method>
		<method name="_process_silence" qualifiers="virtual const">
			<return type="bool" />
			<description>
				Override this method to customize the processing behavior of this effect instance.
				Should return [code]true[/code] to force the [AudioServer] to always call [method _process], even if the bus has been muted or cannot otherwise be heard.
			</description>
		</method>
	</methods>
</class>
