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// Copyright 2022 The Chromium Authors
// 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 "base/memory/raw_ptr.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;
void set_autozoom_supported_for_test(bool value) {
autozoom_supported_for_test_ = value;
}
private:
friend class CameraEffectsControllerTest;
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_new_active_client,
const base::flat_set<std::string>& active_device_ids) override;
// The pref service of the currently active user. Can be null in
// ash_unittests.
raw_ptr<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;
// Allows tests to force autozoom support.
bool autozoom_supported_for_test_ = false;
// 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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