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- // Copyright 2022 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 ASH_SYSTEM_CAMERA_AUTOZOOM_CONTROLLER_IMPL_H_
- #define ASH_SYSTEM_CAMERA_AUTOZOOM_CONTROLLER_IMPL_H_
- #include "ash/ash_export.h"
- #include "ash/public/cpp/session/session_observer.h"
- #include "ash/system/camera/autozoom_nudge_controller.h"
- #include "ash/system/camera/autozoom_observer.h"
- #include "base/observer_list.h"
- #include "components/prefs/pref_change_registrar.h"
- #include "components/prefs/pref_registry_simple.h"
- #include "components/prefs/pref_service.h"
- #include "media/capture/video/chromeos/camera_hal_dispatcher_impl.h"
- #include "media/capture/video/chromeos/mojom/cros_camera_service.mojom.h"
- namespace ash {
- // Controls the Autozoom feature that, when enabled, intelligently
- // pans/tilts/zooms the camera to frame a set of regions of interest captured
- // by the camera.
- class ASH_EXPORT AutozoomControllerImpl
- : public SessionObserver,
- public media::CameraActiveClientObserver {
- public:
- AutozoomControllerImpl();
- AutozoomControllerImpl(const AutozoomControllerImpl&) = delete;
- AutozoomControllerImpl& operator=(const AutozoomControllerImpl&) = delete;
- ~AutozoomControllerImpl() override;
- static void RegisterProfilePrefs(PrefRegistrySimple* registry);
- void SetState(cros::mojom::CameraAutoFramingState state);
- cros::mojom::CameraAutoFramingState GetState();
- void Toggle();
- void AddObserver(AutozoomObserver* observer);
- void RemoveObserver(AutozoomObserver* observer);
- bool IsAutozoomControlEnabled();
- // SessionObserver:
- void OnActiveUserPrefServiceChanged(PrefService* pref_service) override;
- private:
- void InitFromUserPrefs();
- void Refresh();
- void StartWatchingPrefsChanges();
- // Called when the user pref for the enabled status of Autozoom is changed.
- void OnStatePrefChanged();
- void SetAutozoomSupported(bool autozoom_supported);
- // CameraActiveClientObserver
- void OnActiveClientChange(cros::mojom::CameraClientType type,
- bool is_active) override;
- // The pref service of the currently active user. Can be null in
- // ash_unittests.
- PrefService* active_user_pref_service_ = nullptr;
- // The registrar used to watch Autozoom prefs changes in the above
- // |active_user_pref_service_| from outside ash.
- // NOTE: Prefs are how Chrome communicates changes to the Autozoom settings
- // controlled by this class.
- std::unique_ptr<PrefChangeRegistrar> pref_change_registrar_;
- cros::mojom::CameraAutoFramingState state_ =
- cros::mojom::CameraAutoFramingState::OFF;
- base::ObserverList<AutozoomObserver> observers_;
- std::unique_ptr<AutozoomNudgeController> nudge_controller_;
- bool autozoom_supported_ = false;
- // The number of current active camera clients. Autozoom control should only
- // be shown when there's at least one active camera client.
- int active_camera_client_count_ = 0;
- // All methods of this class should be run on the same sequence.
- SEQUENCE_CHECKER(sequence_checker_);
- base::WeakPtrFactory<AutozoomControllerImpl> weak_ptr_factory_{this};
- };
- } // namespace ash
- #endif // ASH_SYSTEM_CAMERA_AUTOZOOM_CONTROLLER_IMPL_H_
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