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Bug 805333 part 1 - AudioChannelService, r=kinetik, a=blocking-basecamp
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| Original file line number | Diff line number | Diff line change |
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| /* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */ | ||
| /* vim: set ts=2 et sw=2 tw=80: */ | ||
| /* 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/. */ | ||
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| #include "AudioChannelService.h" | ||
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| #include "base/basictypes.h" | ||
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| #include "mozilla/Services.h" | ||
| #include "mozilla/StaticPtr.h" | ||
| #include "mozilla/unused.h" | ||
| #include "mozilla/Util.h" | ||
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| #include "mozilla/dom/ContentParent.h" | ||
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| #include "base/basictypes.h" | ||
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| #include "nsThreadUtils.h" | ||
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| using namespace mozilla; | ||
| using namespace mozilla::dom; | ||
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| StaticRefPtr<AudioChannelService> gAudioChannelService; | ||
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| // static | ||
| AudioChannelService* | ||
| AudioChannelService::GetAudioChannelService() | ||
| { | ||
| MOZ_ASSERT(NS_IsMainThread()); | ||
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| // If we already exist, exit early | ||
| if (gAudioChannelService) { | ||
| return gAudioChannelService; | ||
| } | ||
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| // Create new instance, register, return | ||
| nsRefPtr<AudioChannelService> service = new AudioChannelService(); | ||
| NS_ENSURE_TRUE(service, nullptr); | ||
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| gAudioChannelService = service; | ||
| return gAudioChannelService; | ||
| } | ||
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| void | ||
| AudioChannelService::Shutdown() | ||
| { | ||
| if (gAudioChannelService) { | ||
| delete gAudioChannelService; | ||
| gAudioChannelService = nullptr; | ||
| } | ||
| } | ||
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| NS_IMPL_ISUPPORTS0(AudioChannelService) | ||
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| AudioChannelService::AudioChannelService() | ||
| { | ||
| mChannelCounters = new int32_t[AUDIO_CHANNEL_PUBLICNOTIFICATION+1]; | ||
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| for (int i = AUDIO_CHANNEL_NORMAL; | ||
| i <= AUDIO_CHANNEL_PUBLICNOTIFICATION; | ||
| ++i) { | ||
| mChannelCounters[i] = 0; | ||
| } | ||
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| // Creation of the hash table. | ||
| mMediaElements.Init(); | ||
| } | ||
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| AudioChannelService::~AudioChannelService() | ||
| { | ||
| delete [] mChannelCounters; | ||
| } | ||
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| void | ||
| AudioChannelService::RegisterMediaElement(nsHTMLMediaElement* aMediaElement, | ||
| AudioChannelType aType) | ||
| { | ||
| mMediaElements.Put(aMediaElement, aType); | ||
| mChannelCounters[aType]++; | ||
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| // In order to avoid race conditions, it's safer to notify any existing | ||
| // media element any time a new one is registered. | ||
| Notify(); | ||
| } | ||
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| void | ||
| AudioChannelService::UnregisterMediaElement(nsHTMLMediaElement* aMediaElement) | ||
| { | ||
| AudioChannelType type; | ||
| if (!mMediaElements.Get(aMediaElement, &type)) { | ||
| return; | ||
| } | ||
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| mMediaElements.Remove(aMediaElement); | ||
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| mChannelCounters[type]--; | ||
| MOZ_ASSERT(mChannelCounters[type] >= 0); | ||
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| // In order to avoid race conditions, it's safer to notify any existing | ||
| // media element any time a new one is registered. | ||
| Notify(); | ||
| } | ||
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| bool | ||
| AudioChannelService::GetMuted(AudioChannelType aType, bool aElementHidden) | ||
| { | ||
| // We are not visible, maybe we have to mute: | ||
| if (aElementHidden) { | ||
| switch (aType) { | ||
| case AUDIO_CHANNEL_NORMAL: | ||
| return true; | ||
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| case AUDIO_CHANNEL_CONTENT: | ||
| // TODO: this should work per apps | ||
| if (mChannelCounters[AUDIO_CHANNEL_CONTENT] > 1) | ||
| return true; | ||
| break; | ||
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| case AUDIO_CHANNEL_NOTIFICATION: | ||
| case AUDIO_CHANNEL_ALARM: | ||
| case AUDIO_CHANNEL_TELEPHONY: | ||
| case AUDIO_CHANNEL_PUBLICNOTIFICATION: | ||
| // Nothing to do | ||
| break; | ||
| } | ||
| } | ||
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| // Priorities: | ||
| switch (aType) { | ||
| case AUDIO_CHANNEL_NORMAL: | ||
| case AUDIO_CHANNEL_CONTENT: | ||
| return !!mChannelCounters[AUDIO_CHANNEL_NOTIFICATION] || | ||
| !!mChannelCounters[AUDIO_CHANNEL_ALARM] || | ||
| !!mChannelCounters[AUDIO_CHANNEL_TELEPHONY] || | ||
| !!mChannelCounters[AUDIO_CHANNEL_PUBLICNOTIFICATION]; | ||
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| case AUDIO_CHANNEL_NOTIFICATION: | ||
| case AUDIO_CHANNEL_ALARM: | ||
| case AUDIO_CHANNEL_TELEPHONY: | ||
| return ChannelsActiveWithHigherPriorityThan(aType); | ||
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| case AUDIO_CHANNEL_PUBLICNOTIFICATION: | ||
| return false; | ||
| } | ||
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| return false; | ||
| } | ||
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| static PLDHashOperator | ||
| NotifyEnumerator(nsHTMLMediaElement* aElement, | ||
| AudioChannelType aType, void* aData) | ||
| { | ||
| if (aElement) { | ||
| // TODO: this part will be cover by a different patch. | ||
| // aElement->NotifyAudioChannelStateChanged(); | ||
| } | ||
| return PL_DHASH_NEXT; | ||
| } | ||
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| void | ||
| AudioChannelService::Notify() | ||
| { | ||
| MOZ_ASSERT(NS_IsMainThread()); | ||
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| // Notify any media element for the main process. | ||
| mMediaElements.EnumerateRead(NotifyEnumerator, nullptr); | ||
| } | ||
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| bool | ||
| AudioChannelService::ChannelsActiveWithHigherPriorityThan(AudioChannelType aType) | ||
| { | ||
| for (int i = AUDIO_CHANNEL_PUBLICNOTIFICATION; | ||
| i != AUDIO_CHANNEL_CONTENT; --i) { | ||
| if (i == aType) { | ||
| return false; | ||
| } | ||
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| if (mChannelCounters[i]) { | ||
| return true; | ||
| } | ||
| } | ||
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| return false; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| /* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */ | ||
| /* vim: set ts=2 et sw=2 tw=80: */ | ||
| /* 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/. */ | ||
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| #ifndef mozilla_dom_audiochannelservice_h__ | ||
| #define mozilla_dom_audiochannelservice_h__ | ||
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| #include "nsAutoPtr.h" | ||
| #include "nsISupports.h" | ||
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| #include "AudioChannelCommon.h" | ||
| #include "nsHTMLMediaElement.h" | ||
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| namespace mozilla { | ||
| namespace dom { | ||
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| class AudioChannelService : public nsISupports | ||
| { | ||
| public: | ||
| NS_DECL_ISUPPORTS | ||
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| /** | ||
| * Returns the AudioChannelServce singleton. Only to be called from main thread. | ||
| * @return NS_OK on proper assignment, NS_ERROR_FAILURE otherwise. | ||
| */ | ||
| static AudioChannelService* | ||
| GetAudioChannelService(); | ||
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| /** | ||
| * Shutdown the singleton. | ||
| */ | ||
| static void Shutdown(); | ||
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| /** | ||
| * Any MediaElement that starts playing should register itself to | ||
| * this service, sharing the AudioChannelType. | ||
| */ | ||
| void RegisterMediaElement(nsHTMLMediaElement* aMediaElement, | ||
| AudioChannelType aType); | ||
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| /** | ||
| * Any MediaElement that stops playing should unregister itself to | ||
| * this service. | ||
| */ | ||
| void UnregisterMediaElement(nsHTMLMediaElement* aMediaElement); | ||
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| /** | ||
| * Return true if this type should be muted. | ||
| */ | ||
| virtual bool GetMuted(AudioChannelType aType, bool aElementHidden); | ||
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| void Notify(); | ||
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| protected: | ||
| AudioChannelService(); | ||
| 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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| } // namespace dom | ||
| } // namespace mozilla | ||
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| #endif |
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