/* -*- 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 OscillatorNode_h_

#define OscillatorNode_h_

#include "AudioScheduledSourceNode.h"

#include "AudioParam.h"

#include "PeriodicWave.h"

#include "mozilla/dom/OscillatorNodeBinding.h"

namespace mozilla {

namespace dom {

class AudioContext;

struct OscillatorOptions;

class OscillatorNode final : public AudioScheduledSourceNode

                           , public MainThreadMediaStreamListener

{

public:

  static already_AddRefed<OscillatorNode>

  Create(AudioContext& aAudioContext, const OscillatorOptions& aOptions,

         ErrorResult& aRv);

  NS_DECL_ISUPPORTS_INHERITED

  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(OscillatorNode, AudioScheduledSourceNode)

  static already_AddRefed<OscillatorNode>

  Constructor(const GlobalObject& aGlobal, AudioContext& aAudioContext,

              const OscillatorOptions& aOptions, ErrorResult& aRv)

  {

    return Create(aAudioContext, aOptions, aRv);

  }

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

  void DestroyMediaStream() override;

  uint16_t NumberOfInputs() const final

  {

    return 0;

  }

  OscillatorType Type() const

  {

    return mType;

  }

  void SetType(OscillatorType aType, ErrorResult& aRv)

  {

    if (aType == OscillatorType::Custom) {

      // ::Custom can only be set by setPeriodicWave().

      // https://github.com/WebAudio/web-audio-api/issues/105 for exception.

      aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);

      return;

    }

    mType = aType;

    SendTypeToStream();

  }

  AudioParam* Frequency() const

  {

    return mFrequency;

  }

  AudioParam* Detune() const

  {

    return mDetune;

  }

  void Start(double aWhen, ErrorResult& aRv) override;

  void Stop(double aWhen, ErrorResult& aRv) override;

  void SetPeriodicWave(PeriodicWave& aPeriodicWave)

  {

    mPeriodicWave = &aPeriodicWave;

    // SendTypeToStream will call SendPeriodicWaveToStream for us.

    mType = OscillatorType::Custom;

    SendTypeToStream();

  }

  void NotifyMainThreadStreamFinished() override;

  const char* NodeType() const override

  {

    return "OscillatorNode";

  }

  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;

  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;

private:

  explicit OscillatorNode(AudioContext* aContext);

  ~OscillatorNode() = default;

  void SendTypeToStream();

  void SendPeriodicWaveToStream();

  OscillatorType mType;

  RefPtr<PeriodicWave> mPeriodicWave;

  RefPtr<AudioParam> mFrequency;

  RefPtr<AudioParam> mDetune;

  bool mStartCalled;

};

} // namespace dom

} // namespace mozilla

#endif