/* -*- 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 AudioDestinationNode_h_

#define AudioDestinationNode_h_

#include "AudioChannelService.h"

#include "AudioNode.h"

#include "nsIAudioChannelAgent.h"

#include "mozilla/TimeStamp.h"

namespace mozilla {

namespace dom {

class AudioContext;

class AudioDestinationNode final : public AudioNode

                                 , public nsIAudioChannelAgentCallback

                                 , public MainThreadMediaStreamListener

{

public:

  // This node type knows what MediaStreamGraph to use based on

  // whether it's in offline mode.

  AudioDestinationNode(AudioContext* aContext,

                       bool aIsOffline,

                       bool aAllowedToStart,

                       uint32_t aNumberOfChannels = 0,

                       uint32_t aLength = 0,

                       float aSampleRate = 0.0f);

  void DestroyMediaStream() override;

  NS_DECL_ISUPPORTS_INHERITED

  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioDestinationNode, AudioNode)

  NS_DECL_NSIAUDIOCHANNELAGENTCALLBACK

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

  uint16_t NumberOfOutputs() const final

  {

    return 0;

  }

  uint32_t MaxChannelCount() const;

  void SetChannelCount(uint32_t aChannelCount,

                       ErrorResult& aRv) override;

  // Returns the stream or null after unlink.

  AudioNodeStream* Stream() { return mStream; }

  void Mute();

  void Unmute();

  void Suspend();

  void Resume();

  void StartRendering(Promise* aPromise);

  void OfflineShutdown();

  void NotifyMainThreadStreamFinished() override;

  void FireOfflineCompletionEvent();

  nsresult CreateAudioChannelAgent();

  void DestroyAudioChannelAgent();

  const char* NodeType() const override

  {

    return "AudioDestinationNode";

  }

  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;

  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;

  void InputMuted(bool aInputMuted);

  void ResolvePromise(AudioBuffer* aRenderedBuffer);

  unsigned long Length()

  {

    MOZ_ASSERT(mIsOffline);

    return mFramesToProduce;

  }

protected:

  virtual ~AudioDestinationNode();

private:

  SelfReference<AudioDestinationNode> mOfflineRenderingRef;

  uint32_t mFramesToProduce;

  nsCOMPtr<nsIAudioChannelAgent> mAudioChannelAgent;

  RefPtr<MediaInputPort> mCaptureStreamPort;

  RefPtr<Promise> mOfflineRenderingPromise;

  bool mIsOffline;

  bool mAudioChannelSuspended;

  bool mCaptured;

  AudioChannelService::AudibleState mAudible;

  // These varaibles are used to know how long AudioContext would become audible

  // since it was created.

  TimeStamp mCreatedTime;

  TimeDuration mDurationBeforeFirstTimeAudible;

};

} // namespace dom

} // namespace mozilla

#endif