| /* |
| * Copyright (C) 2021 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.hardware.biometrics.face; |
| /** |
| * @hide |
| */ |
| @VintfStability |
| @Backing(type="byte") |
| enum Error { |
| /** |
| * Placeholder value used for default initialization of Error. This value |
| * means Error wasn't explicitly initialized and must be discarded by the |
| * recipient. |
| */ |
| UNKNOWN, |
| |
| /** |
| * A hardware error has occurred that cannot be resolved. Try again later. |
| */ |
| HW_UNAVAILABLE, |
| |
| /** |
| * The current operation could not be completed, e.g. the sensor was unable |
| * to process the current image or the HAT was invalid. |
| */ |
| UNABLE_TO_PROCESS, |
| |
| /** |
| * The current operation took too long to complete. This is intended to |
| * prevent programs from blocking the face HAL indefinitely. The timeout is |
| * framework and sensor-specific, but is generally on the order of 30 |
| * seconds. |
| * |
| * The timeout is a device-specific time meant to optimize power. For |
| * example after 30 seconds of searching for a face it can be use to |
| * indicate that the implementation is no longer looking and the framework |
| * should restart the operation on the next user interaction. |
| */ |
| TIMEOUT, |
| |
| /** |
| * The current operation could not be completed because there is not enough |
| * storage space remaining to do so. |
| */ |
| NO_SPACE, |
| |
| /** |
| * The current operation has been cancelled. This may happen if a new |
| * request (authenticate, remove, enumerate, enroll) is initiated while |
| * an on-going operation is in progress, or if cancel() was called. |
| */ |
| CANCELED, |
| |
| /** |
| * The current remove operation could not be completed; the face template |
| * provided could not be removed. |
| */ |
| UNABLE_TO_REMOVE, |
| |
| /** |
| * Used to enable a vendor-specific error message. |
| */ |
| VENDOR, |
| |
| /** |
| * Authentication cannot be performed because re-enrollment is required. |
| */ |
| REENROLL_REQUIRED, |
| } |