gecko-dev/dom/media/webaudio/GainNode.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef GainNode_h_
#define GainNode_h_

#include "AudioNode.h"
#include "AudioParam.h"

namespace mozilla {
namespace dom {

class AudioContext;
struct GainOptions;

class GainNode final : public AudioNode {
 public:
  static already_AddRefed<GainNode> Create(AudioContext& aAudioContext,
                                           const GainOptions& aOptions,
                                           ErrorResult& aRv);

  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(GainNode, AudioNode)

  static already_AddRefed<GainNode> Constructor(const GlobalObject& aGlobal,
                                                AudioContext& aAudioContext,
                                                const GainOptions& aOptions,
                                                ErrorResult& aRv) {
    return Create(aAudioContext, aOptions, aRv);
  }

  JSObject* WrapObject(JSContext* aCx,
                       JS::Handle<JSObject*> aGivenProto) override;

  AudioParam* Gain() const { return mGain; }

  const char* NodeType() const override { return "GainNode"; }

  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;
  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;

 private:
  explicit GainNode(AudioContext* aContext);
  ~GainNode() = default;

  RefPtr<AudioParam> mGain;
};

}  // namespace dom
}  // namespace mozilla

#endif