AudioWorklet prototype

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

+// Copyright 2017 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 AudioParamMap_h
+#define AudioParamMap_h
+
+#include "bindings/core/v8/ExceptionState.h"
+#include "bindings/core/v8/Maplike.h"
+#include "bindings/core/v8/V8BindingForCore.h"
+#include "platform/heap/Handle.h"
+#include "platform/wtf/text/WTFString.h"
+#include "modules/webaudio/AudioParam.h"
+#include "modules/webaudio/AudioParamDescriptor.h"
+#include "platform/bindings/ScriptWrappable.h"
+
+namespace blink {
+
+class AudioParamMap : public GarbageCollected<AudioParamMap>,
+                      public Maplike<String, AudioParam*>,
+                      public ScriptWrappable {
+  DEFINE_WRAPPERTYPEINFO();
+
+ public:
+  explicit AudioParamMap() {}
+  
+  size_t size() const { return parameter_map_.size(); }
+
+  void AddParameter(const String& name, AudioParam* audio_param) {
+    parameter_map_.insert(name, audio_param);
+  }
+
+  DEFINE_INLINE_VIRTUAL_TRACE() { visitor->Trace(parameter_map_); }
+
+ private:
+  bool GetMapEntry(ScriptState*,
+                   const String& key,
+                   AudioParam*& audio_param,
+                   ExceptionState&) {
+    if (parameter_map_.Contains(key)) {
+      audio_param = parameter_map_.at(key);
+      return true;
+    }
+
+    return false;
+  }
+
+  HeapHashMap<String, Member<AudioParam>> parameter_map_;
+};
+
+}  // namespace blink
+
+#endif