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LibWeb: Start filling out BaseAudioContext/AudioContext interfaces

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- Fills out both IDLs and implements some basic attributes/methods.
- No actual audio processing yet though :^)
This commit is contained in:
Daniel Adams 2023-06-27 13:34:51 -04:00 • committed by Andreas Kling
parent 30e67721ae
commit 49e6414c58
8 changed files with 407 additions and 8 deletions
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36
Userland/Libraries/LibWeb/WebAudio/AudioContext.h
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@ -6,23 +6,55 @@
#pragma once
#include <LibWeb/Bindings/AudioContextPrototype.h>
#include <LibWeb/HighResolutionTime/DOMHighResTimeStamp.h>
#include <LibWeb/WebAudio/BaseAudioContext.h>
namespace Web::WebAudio {
struct AudioContextOptions {
Bindings::AudioContextLatencyCategory latency_hint = Bindings::AudioContextLatencyCategory::Interactive;
Optional<float> sample_rate;
};
struct AudioTimestamp {
double context_time { 0 };
double performance_time { 0 };
};
// https://webaudio.github.io/web-audio-api/#AudioContext
class AudioContext final : public BaseAudioContext {
WEB_PLATFORM_OBJECT(AudioContext, BaseAudioContext);
public:
static WebIDL::ExceptionOr<JS::NonnullGCPtr<AudioContext>> construct_impl(JS::Realm&);
static WebIDL::ExceptionOr<JS::NonnullGCPtr<AudioContext>> construct_impl(JS::Realm&, AudioContextOptions const& context_options = {});
virtual ~AudioContext() override;
double base_latency() const { return m_base_latency; };
double output_latency() const { return m_output_latency; };
AudioTimestamp get_output_timestamp();
WebIDL::ExceptionOr<JS::NonnullGCPtr<JS::Promise>> resume();
WebIDL::ExceptionOr<JS::NonnullGCPtr<JS::Promise>> suspend();
WebIDL::ExceptionOr<JS::NonnullGCPtr<JS::Promise>> close();
private:
explicit AudioContext(JS::Realm&);
explicit AudioContext(JS::Realm&, AudioContextOptions const& context_options);
virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
virtual void visit_edges(Cell::Visitor&) override;
double m_base_latency { 0 };
double m_output_latency { 0 };
bool m_allowed_to_start = true;
Vector<JS::NonnullGCPtr<WebIDL::Promise>> m_pending_promises;
Vector<JS::NonnullGCPtr<WebIDL::Promise>> m_pending_resume_promises;
bool m_suspended_by_user = false;
HTML::UniqueTaskSource m_media_element_event_task_source {};
void queue_a_media_element_task(JS::SafeFunction<void()> steps);
bool start_rendering_audio_graph();
};
}