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71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_audiochannelservice_h__
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#define mozilla_dom_audiochannelservice_h__
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#include "nsAutoPtr.h"
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#include "nsISupports.h"
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#include "AudioChannelCommon.h"
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#include "nsHTMLMediaElement.h"
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namespace mozilla {
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namespace dom {
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class AudioChannelService : public nsISupports
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{
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public:
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NS_DECL_ISUPPORTS
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/**
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* Returns the AudioChannelServce singleton. Only to be called from main thread.
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* @return NS_OK on proper assignment, NS_ERROR_FAILURE otherwise.
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*/
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static AudioChannelService*
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GetAudioChannelService();
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/**
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* Shutdown the singleton.
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*/
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static void Shutdown();
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/**
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* Any MediaElement that starts playing should register itself to
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* this service, sharing the AudioChannelType.
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*/
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void RegisterMediaElement(nsHTMLMediaElement* aMediaElement,
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AudioChannelType aType);
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/**
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* Any MediaElement that stops playing should unregister itself to
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* this service.
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*/
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void UnregisterMediaElement(nsHTMLMediaElement* aMediaElement);
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/**
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* Return true if this type should be muted.
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*/
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virtual bool GetMuted(AudioChannelType aType, bool aElementHidden);
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void Notify();
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protected:
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AudioChannelService();
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virtual ~AudioChannelService();
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bool ChannelsActiveWithHigherPriorityThan(AudioChannelType aType);
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nsDataHashtable< nsPtrHashKey<nsHTMLMediaElement>, AudioChannelType > mMediaElements;
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int32_t* mChannelCounters;
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};
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} // namespace dom
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} // namespace mozilla
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#endif
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