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https://github.com/SerenityOS/serenity
synced 2024-07-21 10:05:32 +00:00
LibWeb: Add Implement GainNode interface
As with all other current audio nodes we still need to wire up the inputs and outputs so it can be properly used in an audio context - but this is enough to implement the public IDL interface.
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@ -673,6 +673,7 @@ set(SOURCES
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WebAudio/AudioScheduledSourceNode.cpp
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WebAudio/BaseAudioContext.cpp
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WebAudio/DynamicsCompressorNode.cpp
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WebAudio/GainNode.cpp
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WebAudio/OfflineAudioContext.cpp
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WebAudio/OscillatorNode.cpp
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WebAudio/PeriodicWave.cpp
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@ -700,6 +700,7 @@ class AudioParam;
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class AudioScheduledSourceNode;
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class BaseAudioContext;
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class DynamicsCompressorNode;
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class GainNode;
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class OfflineAudioContext;
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class OscillatorNode;
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class PeriodicWave;
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48
Userland/Libraries/LibWeb/WebAudio/GainNode.cpp
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48
Userland/Libraries/LibWeb/WebAudio/GainNode.cpp
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/*
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* Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/WebAudio/AudioParam.h>
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#include <LibWeb/WebAudio/BaseAudioContext.h>
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#include <LibWeb/WebAudio/GainNode.h>
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namespace Web::WebAudio {
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JS_DEFINE_ALLOCATOR(GainNode);
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GainNode::~GainNode() = default;
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JS::NonnullGCPtr<GainNode> GainNode::create(JS::Realm& realm, JS::NonnullGCPtr<BaseAudioContext> context, GainOptions const& options)
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{
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return construct_impl(realm, context, options);
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}
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// https://webaudio.github.io/web-audio-api/#dom-gainnode-gainnode
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JS::NonnullGCPtr<GainNode> GainNode::construct_impl(JS::Realm& realm, JS::NonnullGCPtr<BaseAudioContext> context, GainOptions const& options)
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{
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// FIXME: Invoke "Initialize the AudioNode" steps.
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return realm.vm().heap().allocate<GainNode>(realm, realm, context, options);
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}
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GainNode::GainNode(JS::Realm& realm, JS::NonnullGCPtr<BaseAudioContext> context, GainOptions const& options)
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: AudioNode(realm, context)
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, m_gain(AudioParam::create(realm, options.gain, NumericLimits<float>::lowest(), NumericLimits<float>::max(), Bindings::AutomationRate::ARate))
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{
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}
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void GainNode::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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WEB_SET_PROTOTYPE_FOR_INTERFACE(GainNode);
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}
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void GainNode::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_gain);
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}
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}
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43
Userland/Libraries/LibWeb/WebAudio/GainNode.h
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43
Userland/Libraries/LibWeb/WebAudio/GainNode.h
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@ -0,0 +1,43 @@
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/*
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* Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibWeb/Bindings/GainNodePrototype.h>
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#include <LibWeb/WebAudio/AudioScheduledSourceNode.h>
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namespace Web::WebAudio {
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// https://webaudio.github.io/web-audio-api/#GainOptions
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struct GainOptions : AudioNodeOptions {
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float gain { 1.0 };
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};
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// https://webaudio.github.io/web-audio-api/#GainNode
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class GainNode : public AudioNode {
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WEB_PLATFORM_OBJECT(GainNode, AudioNode);
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JS_DECLARE_ALLOCATOR(GainNode);
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public:
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virtual ~GainNode() override;
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static JS::NonnullGCPtr<GainNode> create(JS::Realm&, JS::NonnullGCPtr<BaseAudioContext>, GainOptions const& = {});
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static JS::NonnullGCPtr<GainNode> construct_impl(JS::Realm&, JS::NonnullGCPtr<BaseAudioContext>, GainOptions const& = {});
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JS::NonnullGCPtr<AudioParam const> gain() const { return m_gain; }
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protected:
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GainNode(JS::Realm&, JS::NonnullGCPtr<BaseAudioContext>, GainOptions const& = {});
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virtual void initialize(JS::Realm&) override;
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virtual void visit_edges(Cell::Visitor&) override;
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private:
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// https://webaudio.github.io/web-audio-api/#dom-gainnode-gain
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JS::NonnullGCPtr<AudioParam> m_gain;
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};
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}
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15
Userland/Libraries/LibWeb/WebAudio/GainNode.idl
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15
Userland/Libraries/LibWeb/WebAudio/GainNode.idl
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#import <WebAudio/AudioNode.idl>
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#import <WebAudio/AudioParam.idl>
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#import <WebAudio/BaseAudioContext.idl>
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// https://webaudio.github.io/web-audio-api/#GainOptions
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dictionary GainOptions : AudioNodeOptions {
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float gain = 1.0;
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};
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// https://webaudio.github.io/web-audio-api/#GainNode
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[Exposed=Window]
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interface GainNode : AudioNode {
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constructor(BaseAudioContext context, optional GainOptions options = {});
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readonly attribute AudioParam gain;
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};
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@ -306,6 +306,7 @@ libweb_js_bindings(WebAudio/AudioParam)
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libweb_js_bindings(WebAudio/AudioScheduledSourceNode)
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libweb_js_bindings(WebAudio/BaseAudioContext)
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libweb_js_bindings(WebAudio/DynamicsCompressorNode)
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libweb_js_bindings(WebAudio/GainNode)
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libweb_js_bindings(WebAudio/OfflineAudioContext)
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libweb_js_bindings(WebAudio/OscillatorNode)
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libweb_js_bindings(WebAudio/PeriodicWave)
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