| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_BROWSER_SEARCH_HOTWORD_SERVICE_FACTORY_H_ |
| #define CHROME_BROWSER_SEARCH_HOTWORD_SERVICE_FACTORY_H_ |
| |
| #include "base/memory/singleton.h" |
| #include "chrome/browser/media/media_capture_devices_dispatcher.h" |
| #include "components/keyed_service/content/browser_context_keyed_service_factory.h" |
| |
| class HotwordService; |
| class Profile; |
| |
| // Singleton that owns all HotwordServices and associates them with Profiles. |
| class HotwordServiceFactory : public MediaCaptureDevicesDispatcher::Observer, |
| public BrowserContextKeyedServiceFactory { |
| public: |
| // Returns the HotwordService for |context|. |
| static HotwordService* GetForProfile(content::BrowserContext* context); |
| |
| static HotwordServiceFactory* GetInstance(); |
| |
| // Returns true if the hotwording service is available for |context|. |
| static bool IsServiceAvailable(content::BrowserContext* context); |
| |
| // Returns true if hotwording is allowed for |context|. |
| static bool IsHotwordAllowed(content::BrowserContext* context); |
| |
| // Returns the current error message for the service for |context|. |
| // A value of 0 indicates no error. |
| static int GetCurrentError(content::BrowserContext* context); |
| |
| // Returns the current known state of the microphone. Since this state |
| // is browser (not profile) specific, it resides in the factory. |
| static bool IsMicrophoneAvailable(); |
| |
| // Overridden from MediaCaptureDevicesDispatcher::Observer |
| virtual void OnUpdateAudioDevices( |
| const content::MediaStreamDevices& devices) OVERRIDE; |
| |
| // This will kick off the monitor that calls OnUpdateAudioDevices when the |
| // number of audio devices changes (or is initialized). It needs to be a |
| // separate function so it can be called after the service is initialized |
| // (i.e., after startup). The monitor can't be initialized during startup |
| // because it would slow down startup too much so it is delayed and not |
| // called until it's needed by the webui in browser_options_handler. |
| void UpdateMicrophoneState(); |
| |
| private: |
| friend struct DefaultSingletonTraits<HotwordServiceFactory>; |
| |
| HotwordServiceFactory(); |
| virtual ~HotwordServiceFactory(); |
| |
| // Overrides from BrowserContextKeyedServiceFactory: |
| virtual void RegisterProfilePrefs( |
| user_prefs::PrefRegistrySyncable* registry) OVERRIDE; |
| virtual KeyedService* BuildServiceInstanceFor( |
| content::BrowserContext* context) const OVERRIDE; |
| |
| // Must be called from the UI thread since the instance of |
| // MediaCaptureDevicesDispatcher can only be accessed on the UI thread. |
| void InitializeMicrophoneObserver(); |
| |
| bool microphone_available() { return microphone_available_; } |
| |
| bool microphone_available_; |
| |
| DISALLOW_COPY_AND_ASSIGN(HotwordServiceFactory); |
| }; |
| |
| #endif // CHROME_BROWSER_SEARCH_HOTWORD_SERVICE_FACTORY_H_ |