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AudioDestinationNode

Macros

Line Code
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/* -*- 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 "mozilla/dom/AudioChannelBinding.h"
#include "AudioNode.h"
#include "nsIAudioChannelAgent.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,
                       AudioChannel aChannel = AudioChannel::Normal,
                       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 override
  {
    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();

  AudioChannel MozAudioChannelType() const;

  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:
  void SetMozAudioChannelType(AudioChannel aValue, ErrorResult& aRv);
  bool CheckAudioChannelPermissions(AudioChannel aValue);

  SelfReference<AudioDestinationNode> mOfflineRenderingRef;
  uint32_t mFramesToProduce;

  nsCOMPtr<nsIAudioChannelAgent> mAudioChannelAgent;
  RefPtr<MediaInputPort> mCaptureStreamPort;

  RefPtr<Promise> mOfflineRenderingPromise;

  // Audio Channel Type.
  AudioChannel mAudioChannel;
  bool mIsOffline;
  bool mAudioChannelSuspended;

  bool mCaptured;
};

} // namespace dom
} // namespace mozilla

#endif