dom/media/webaudio/AudioDestinationNode.h
author Andreas Pehrson <apehrson@mozilla.com>
Fri, 23 Nov 2018 15:00:26 +0000
changeset 504258 befba547fb5850fd62d4e31784aa4b5198404500
parent 503396 0ceae9db9ec0be18daa1a279511ad305723185d4
permissions -rw-r--r--
Bug 1423241 - Fix MediaStreamTrackListener::NotifyEnded. r=padenot Without this, NotifyEnded() happens before the track has been played out, at the time it's marked ended by its producer. This change will actually make us wait until the last chunk has been played out and then notify listeners. Differential Revision: https://phabricator.services.mozilla.com/D12269

/* -*- 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,
                       uint32_t aLength);

  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();

  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 NotifyAudibleStateChanged(bool aAudible);
  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