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LibWeb: Add stub IDL interface for AudioParam

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An AudioParam is a fundamental building block in WebAudio as it controls
the value of an individual parameter of an AudioNode, such as volume.
This commit is contained in:
Shannon Booth 2024-04-28 12:26:30 +12:00 • committed by Andreas Kling
commit 5ae0ac7b73
Notes: sideshowbarker 2024-07-17 02:28:18 +09:00
7 changed files with 213 additions and 0 deletions
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Userland/Libraries/LibWeb/WebAudio/AudioParam.h Normal file
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/*
* Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibJS/Forward.h>
#include <LibWeb/Bindings/AudioParamPrototype.h>
#include <LibWeb/Bindings/PlatformObject.h>
namespace Web::WebAudio {
// https://webaudio.github.io/web-audio-api/#AudioParam
class AudioParam final : public Bindings::PlatformObject {
WEB_PLATFORM_OBJECT(AudioParam, Bindings::PlatformObject);
JS_DECLARE_ALLOCATOR(AudioParam);
public:
virtual ~AudioParam() override;
float value() const;
void set_value(float);
Bindings::AutomationRate automation_rate() const;
WebIDL::ExceptionOr<void> set_automation_rate(Bindings::AutomationRate);
float default_value() const;
float min_value() const;
float max_value() const;
WebIDL::ExceptionOr<JS::NonnullGCPtr<AudioParam>> set_value_at_time(float value, double start_time);
WebIDL::ExceptionOr<JS::NonnullGCPtr<AudioParam>> linear_ramp_to_value_at_time(float value, double end_time);
WebIDL::ExceptionOr<JS::NonnullGCPtr<AudioParam>> exponential_ramp_to_value_at_time(float value, double end_time);
WebIDL::ExceptionOr<JS::NonnullGCPtr<AudioParam>> set_target_at_time(float target, double start_time, float time_constant);
WebIDL::ExceptionOr<JS::NonnullGCPtr<AudioParam>> set_value_curve_at_time(Span<float> values, double start_time, double duration);
WebIDL::ExceptionOr<JS::NonnullGCPtr<AudioParam>> cancel_scheduled_values(double cancel_time);
WebIDL::ExceptionOr<JS::NonnullGCPtr<AudioParam>> cancel_and_hold_at_time(double cancel_time);
private:
// https://webaudio.github.io/web-audio-api/#dom-audioparam-current-value-slot
float m_current_value {}; // [[current value]]
float m_default_value {};
float m_min_value {};
float m_max_value {};
Bindings::AutomationRate m_automation_rate {};
virtual void initialize(JS::Realm&) override;
virtual void visit_edges(Cell::Visitor&) override;
};
}