| // Copyright 2019 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 IOS_CHROME_BROWSER_UI_SCANNER_CAMERA_STATE_H_ |
| #define IOS_CHROME_BROWSER_UI_SCANNER_CAMERA_STATE_H_ |
| |
| namespace scanner { |
| |
| // Values to distinguish between different camera states to display the correct |
| // view controller or system alert. |
| // Note: no state encodes the state where the usage of the camera is prohibited |
| // because the app is in the background. The reason is that iOS transparently |
| // stops/starts the camera when the app enter/leaves the background. |
| // See AVCaptureSessionInterruptionReasonVideoDeviceNotAvailableInBackground for |
| // more information. |
| enum CameraState { |
| // Camera is loaded and available; |
| CAMERA_AVAILABLE = 0, |
| // The application cannot use the camera because it is in use exclusively by |
| // another application. |
| CAMERA_IN_USE_BY_ANOTHER_APPLICATION, |
| // The application cannot use the camera because video input is not supported |
| // if there are multiple foreground apps running. |
| MULTIPLE_FOREGROUND_APPS, |
| // The application does not have the permission to use the camera. |
| CAMERA_PERMISSION_DENIED, |
| // Camera unavailable due to "system pressure". |
| CAMERA_UNAVAILABLE_DUE_TO_SYSTEM_PRESSURE, |
| // The camera is unavailable for an unspecified reason. |
| CAMERA_UNAVAILABLE, |
| // The camera was not yet loaded. |
| CAMERA_NOT_LOADED, |
| }; |
| |
| } // namespace scanner |
| |
| #endif // IOS_CHROME_BROWSER_UI_SCANNER_CAMERA_STATE_H_ |
