/* -*- 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 MediaStreamAudioSourceNode_h_

#define MediaStreamAudioSourceNode_h_

#include "AudioNode.h"

#include "DOMMediaStream.h"

#include "AudioNodeEngine.h"

namespace mozilla {

namespace dom {

class AudioContext;

struct MediaStreamAudioSourceOptions;

class MediaStreamAudioSourceNodeEngine final : public AudioNodeEngine

{

public:

  explicit MediaStreamAudioSourceNodeEngine(AudioNode* aNode)

    : AudioNodeEngine(aNode), mEnabled(false) {}

  bool IsEnabled() const { return mEnabled; }

  enum Parameters {

    ENABLE

  };

  void SetInt32Parameter(uint32_t aIndex, int32_t aValue) override

  {

    switch (aIndex) {

    case ENABLE:

      mEnabled = !!aValue;

      break;

    default:

      NS_ERROR("MediaStreamAudioSourceNodeEngine bad parameter index");

    }

  }

private:

  bool mEnabled;

};

class MediaStreamAudioSourceNode : public AudioNode,

                                   public DOMMediaStream::TrackListener,

                                   public PrincipalChangeObserver<MediaStreamTrack>

{

public:

  static already_AddRefed<MediaStreamAudioSourceNode>

  Create(AudioContext& aContext, const MediaStreamAudioSourceOptions& aOptions,

         ErrorResult& aRv);

  NS_DECL_ISUPPORTS_INHERITED

  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(MediaStreamAudioSourceNode, AudioNode)

  static already_AddRefed<MediaStreamAudioSourceNode>

  Constructor(const GlobalObject& aGlobal, AudioContext& aAudioContext,

              const MediaStreamAudioSourceOptions& aOptions, ErrorResult& aRv)

  {

    return Create(aAudioContext, aOptions, aRv);

  }

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

  void DestroyMediaStream() override;

  uint16_t NumberOfInputs() const override { return 0; }

  const char* NodeType() const override

  {

    return "MediaStreamAudioSourceNode";

  }

  virtual const char* CrossOriginErrorString() const

  {

    return "MediaStreamAudioSourceNodeCrossOrigin";

  }

  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;

  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;

  // Attaches to aTrack so that its audio content will be used as input.

  void AttachToTrack(const RefPtr<MediaStreamTrack>& aTrack);

  // Detaches from the currently attached track if there is one.

  void DetachFromTrack();

  // Attaches to the first available audio track in aMediaStream.

  void AttachToFirstTrack(const RefPtr<DOMMediaStream>& aMediaStream);

  // From DOMMediaStream::TrackListener.

  void NotifyTrackAdded(const RefPtr<MediaStreamTrack>& aTrack) override;

  void NotifyTrackRemoved(const RefPtr<MediaStreamTrack>& aTrack) override;

  // From PrincipalChangeObserver<MediaStreamTrack>.

  void PrincipalChanged(MediaStreamTrack* aMediaStreamTrack) override;

protected:

  explicit MediaStreamAudioSourceNode(AudioContext* aContext);

  void Init(DOMMediaStream* aMediaStream, ErrorResult& aRv);

  void Destroy();

  virtual ~MediaStreamAudioSourceNode();

private:

  RefPtr<MediaInputPort> mInputPort;

  RefPtr<DOMMediaStream> mInputStream;

  // On construction we set this to the first audio track of mInputStream.

  RefPtr<MediaStreamTrack> mInputTrack;

};

} // namespace dom

} // namespace mozilla

#endif