Implement AudioWorkletProcessor interface

third_party/WebKit/Source/modules/webaudio/AudioWorkletGlobalScope.h

 // 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 AudioWorkletGlobalScope_h
 #define AudioWorkletGlobalScope_h
 
+#include "bindings/core/v8/ScriptValue.h"
+#include "core/dom/ExecutionContext.h"
 #include "core/workers/ThreadedWorkletGlobalScope.h"
+#include "modules/ModulesExport.h"
 
 namespace blink {
 
-class AudioWorkletGlobalScope final : public ThreadedWorkletGlobalScope {
+class AudioBuffer;
+class AudioWorkletProcessor;
+class AudioWorkletProcessorDefinition;
+class ExceptionState;
+
+// This is constructed and destroyed on a worker thread, and all methods also
+// must be called on the worker thread.
+class MODULES_EXPORT AudioWorkletGlobalScope final
+    : public ThreadedWorkletGlobalScope {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   static AudioWorkletGlobalScope* create(const KURL&,
                                          const String& userAgent,
                                          PassRefPtr<SecurityOrigin>,
                                          v8::Isolate*,
                                          WorkerThread*);
   ~AudioWorkletGlobalScope() override;
+  void dispose() final;
+  bool isAudioWorkletGlobalScope() const final { return true; }
+  void registerProcessor(const String& name,
+                         const ScriptValue& classDefinition,
+                         ExceptionState&);
+
+  // Creates an instance of AudioWorkletProcessor from a registered name. This
+  // function may return nullptr when 1) a definition cannot be found or 2) a
+  // new V8 object cannot be constructed for some reason.
+  AudioWorkletProcessor* createInstance(const String& name);
+
+  // Invokes the JS audio processing function from an instance of
+  // AudioWorkletProcessor, along with given AudioBuffer from the audio graph.
+  bool process(AudioWorkletProcessor*,
+               AudioBuffer* inputBuffer,
+               AudioBuffer* outputBuffer);
+
+  AudioWorkletProcessorDefinition* findDefinition(const String& name);
+
+  DECLARE_TRACE();
 
  private:
   AudioWorkletGlobalScope(const KURL&,
                           const String& userAgent,
                           PassRefPtr<SecurityOrigin>,
                           v8::Isolate*,
                           WorkerThread*);
+
+  typedef HeapHashMap<String, Member<AudioWorkletProcessorDefinition>>
+      ProcessorDefinitionMap;
+  typedef HeapVector<Member<AudioWorkletProcessor>> ProcessorInstances;
+
+  ProcessorDefinitionMap m_processorDefinitionMap;
+  ProcessorInstances m_processorInstances;
 };
 
 }  // namespace blink
 
 #endif  // AudioWorkletGlobalScope_h