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// Copyright 2019 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_GRAPH_TRACER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_AUDIO_GRAPH_TRACER_H_
#include "third_party/blink/renderer/core/page/page.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/supplementable.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
namespace blink {
class AudioListener;
class AudioNode;
class AudioParam;
class BaseAudioContext;
class Document;
class InspectorWebAudioAgent;
class Page;
class MODULES_EXPORT AudioGraphTracer final
: public GarbageCollected<AudioGraphTracer>,
public Supplement<Page> {
public:
static const char kSupplementName[];
static void ProvideAudioGraphTracerTo(Page&);
AudioGraphTracer();
void Trace(Visitor*) const override;
void SetInspectorAgent(InspectorWebAudioAgent*);
// Graph lifecycle events: notifies an associated inspector agent about
// the object lifecycle of BaseAudioContext, AudioListener, AudioNode, and
// AudioParam.
void DidCreateBaseAudioContext(BaseAudioContext*);
void WillDestroyBaseAudioContext(BaseAudioContext*);
void DidCreateAudioListener(AudioListener*);
void WillDestroyAudioListener(AudioListener*);
void DidCreateAudioNode(AudioNode*);
void WillDestroyAudioNode(AudioNode*);
void DidCreateAudioParam(AudioParam*);
void WillDestroyAudioParam(AudioParam*);
// Graph connection events: notifies an associated inspector agent about
// when a connection between graph objects happens.
void DidConnectNodes(AudioNode* source_node,
AudioNode* destination_node,
unsigned source_output_index = 0,
unsigned destination_input_index = 0);
void DidDisconnectNodes(AudioNode* source_node,
AudioNode* destination_node = nullptr,
unsigned source_output_index = 0,
unsigned destination_input_index = 0);
void DidConnectNodeParam(AudioNode* source_node,
AudioParam* destination_param,
unsigned source_output_index = 0);
void DidDisconnectNodeParam(AudioNode* source_node,
AudioParam* destination_param,
unsigned source_output_index = 0);
// Notifies an associated inspector agent when a BaseAudioContext is changed.
void DidChangeBaseAudioContext(BaseAudioContext*);
BaseAudioContext* GetContextById(const String contextId);
static AudioGraphTracer* FromPage(Page*);
static AudioGraphTracer* FromDocument(const Document&);
private:
Member<InspectorWebAudioAgent> inspector_agent_;
HeapHashSet<WeakMember<BaseAudioContext>> contexts_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_AUDIO_GRAPH_TRACER_H_
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