| /* |
| * Copyright (C) 2017 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.frameworks.sensorservice@1.0; |
| |
| import android.hardware.sensors@1.0::RateLevel; |
| |
| /** |
| * The interface represents a direct channel created by |
| * ISensorManager.createSharedMemoryDirectChannel() and |
| * ISensorMangaer.createHardwareBufferDirectChannel(). |
| */ |
| interface IDirectReportChannel { |
| |
| /** |
| * Configure direct report on channel |
| * |
| * Configure sensor direct report on a direct channel: set rate to value |
| * other than STOP so that sensor event can be directly written into the |
| * shared memory region used for creating the channel; set rate to STOP will |
| * stop the sensor direct report. |
| * |
| * To stop all active sensor direct report configured to a channel, set |
| * sensorHandle to -1 and rate to STOP. |
| * |
| * @param sensorHandle handle of the sensor to operate on. If it is -1 |
| * and rate is STOP, the call must stop of all active |
| * sensor direct report. |
| * @param rate rate level value to set on the specified sensor. |
| * |
| * @return result OK on success; |
| * BAD_VALUE if parameter is invalid (for example, |
| * rate level is not supported by sensor, etc); |
| * INVALID_OPERATION if functionality is not supported. |
| * @return token the token used to distinguish sensor events from |
| * multiple different sensors of the same type in a |
| * single direct channel, or 0 if: (1) no such token |
| * may be returned or (2) error (in which case result |
| * must be value other than OK). |
| */ |
| configure(int32_t sensorHandle, RateLevel rate) |
| generates (int32_t token, Result result); |
| }; |