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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_AUDIO_WORKLET_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_AUDIO_WORKLET_H_
#include "base/macros.h"
#include "third_party/blink/renderer/core/workers/worklet.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
namespace blink {
class AudioWorkletHandler;
class AudioWorkletMessagingProxy;
class BaseAudioContext;
class CrossThreadAudioParamInfo;
class MessagePortChannel;
class SerializedScriptValue;
class MODULES_EXPORT AudioWorklet final : public Worklet {
DEFINE_WRAPPERTYPEINFO();
public:
explicit AudioWorklet(BaseAudioContext*);
~AudioWorklet() override = default;
void CreateProcessor(scoped_refptr<AudioWorkletHandler>,
MessagePortChannel,
scoped_refptr<SerializedScriptValue> node_options);
// Invoked by AudioWorkletMessagingProxy. Notifies |context_| when
// AudioWorkletGlobalScope finishes the first script evaluation and is ready
// for the worklet operation. Can be used for other post-evaluation tasks
// in AudioWorklet or BaseAudioContext.
void NotifyGlobalScopeIsUpdated();
BaseAudioContext* GetBaseAudioContext() const;
// Returns |nullptr| if there is no active WorkletGlobalScope().
AudioWorkletMessagingProxy* GetMessagingProxy();
const Vector<CrossThreadAudioParamInfo> GetParamInfoListForProcessor(
const String& name);
bool IsProcessorRegistered(const String& name);
// Returns |true| when a AudioWorkletMessagingProxy and a WorkletBackingThread
// are ready.
bool IsReady();
void Trace(Visitor*) const override;
private:
// Implements Worklet
bool NeedsToCreateGlobalScope() final;
WorkletGlobalScopeProxy* CreateGlobalScope() final;
// To catch the first global scope update and notify the context.
bool worklet_started_ = false;
Member<BaseAudioContext> context_;
DISALLOW_COPY_AND_ASSIGN(AudioWorklet);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_AUDIO_WORKLET_H_
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