/* -*- 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 AudioProcessingEvent_h_

#define AudioProcessingEvent_h_

#include "AudioBuffer.h"

#include "ScriptProcessorNode.h"

#include "mozilla/dom/Event.h"

namespace mozilla {

namespace dom {

class AudioProcessingEvent final : public Event

{

public:

  AudioProcessingEvent(ScriptProcessorNode* aOwner,

                       nsPresContext* aPresContext,

                       WidgetEvent* aEvent);

  NS_DECL_ISUPPORTS_INHERITED

  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioProcessingEvent, Event)

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

  using Event::InitEvent;

  void InitEvent(AudioBuffer* aInputBuffer,

                 uint32_t aNumberOfInputChannels,

                 double aPlaybackTime)

  {

    InitEvent(NS_LITERAL_STRING("audioprocess"), CanBubble::eNo, Cancelable::eNo);

    mInputBuffer = aInputBuffer;

    mNumberOfInputChannels = aNumberOfInputChannels;

    mPlaybackTime = aPlaybackTime;

  }

  double PlaybackTime() const

  {

    return mPlaybackTime;

  }

  AudioBuffer* GetInputBuffer(ErrorResult& aRv)

  {

    if (!mInputBuffer) {

      mInputBuffer = LazilyCreateBuffer(mNumberOfInputChannels, aRv);

    }

    return mInputBuffer;

  }

  AudioBuffer* GetOutputBuffer(ErrorResult& aRv)

  {

    if (!mOutputBuffer) {

      mOutputBuffer = LazilyCreateBuffer(mNode->NumberOfOutputChannels(), aRv);

    }

    return mOutputBuffer;

  }

  bool HasOutputBuffer() const

  {

    return !!mOutputBuffer;

  }

protected:

  virtual ~AudioProcessingEvent();

private:

  already_AddRefed<AudioBuffer>

  LazilyCreateBuffer(uint32_t aNumberOfChannels, ErrorResult& rv);

private:

  double mPlaybackTime;

  RefPtr<AudioBuffer> mInputBuffer;

  RefPtr<AudioBuffer> mOutputBuffer;

  RefPtr<ScriptProcessorNode> mNode;

  uint32_t mNumberOfInputChannels;

};

} // namespace dom

} // namespace mozilla

#endif