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2ef37c0b06
...and use HeapFunction instead of SafeFunction for task steps. Since there is only one EventLoop per process, it lives as a global handle in the VM custom data. This makes it much easier to reason about lifetimes of tasks, task steps, and random stuff captured by them.
62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
/*
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* Copyright (c) 2023, Luke Wilde <lukew@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/AudioContextPrototype.h>
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#include <LibWeb/HighResolutionTime/DOMHighResTimeStamp.h>
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#include <LibWeb/WebAudio/BaseAudioContext.h>
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namespace Web::WebAudio {
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struct AudioContextOptions {
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Bindings::AudioContextLatencyCategory latency_hint = Bindings::AudioContextLatencyCategory::Interactive;
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Optional<float> sample_rate;
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};
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struct AudioTimestamp {
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double context_time { 0 };
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double performance_time { 0 };
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};
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// https://webaudio.github.io/web-audio-api/#AudioContext
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class AudioContext final : public BaseAudioContext {
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WEB_PLATFORM_OBJECT(AudioContext, BaseAudioContext);
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JS_DECLARE_ALLOCATOR(AudioContext);
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public:
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static WebIDL::ExceptionOr<JS::NonnullGCPtr<AudioContext>> construct_impl(JS::Realm&, AudioContextOptions const& context_options = {});
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virtual ~AudioContext() override;
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double base_latency() const { return m_base_latency; }
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double output_latency() const { return m_output_latency; }
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AudioTimestamp get_output_timestamp();
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WebIDL::ExceptionOr<JS::NonnullGCPtr<JS::Promise>> resume();
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WebIDL::ExceptionOr<JS::NonnullGCPtr<JS::Promise>> suspend();
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WebIDL::ExceptionOr<JS::NonnullGCPtr<JS::Promise>> close();
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private:
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explicit AudioContext(JS::Realm&, AudioContextOptions const& context_options);
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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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double m_base_latency { 0 };
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double m_output_latency { 0 };
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bool m_allowed_to_start = true;
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Vector<JS::NonnullGCPtr<WebIDL::Promise>> m_pending_promises;
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Vector<JS::NonnullGCPtr<WebIDL::Promise>> m_pending_resume_promises;
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bool m_suspended_by_user = false;
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HTML::UniqueTaskSource m_media_element_event_task_source {};
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void queue_a_media_element_task(Function<void()> steps);
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bool start_rendering_audio_graph();
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};
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}
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