57 lines
2.4 KiB
Plaintext
57 lines
2.4 KiB
Plaintext
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.frameworks.sensorservice@1.0;
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import android.hardware.sensors@1.0::RateLevel;
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/**
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* The interface represents a direct channel created by
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* ISensorManager.createSharedMemoryDirectChannel() and
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* ISensorMangaer.createHardwareBufferDirectChannel().
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*/
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interface IDirectReportChannel {
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/**
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* Configure direct report on channel
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*
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* Configure sensor direct report on a direct channel: set rate to value
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* other than STOP so that sensor event can be directly written into the
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* shared memory region used for creating the channel; set rate to STOP will
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* stop the sensor direct report.
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*
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* To stop all active sensor direct report configured to a channel, set
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* sensorHandle to -1 and rate to STOP.
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*
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* @param sensorHandle handle of the sensor to operate on. If it is -1
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* and rate is STOP, the call must stop of all active
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* sensor direct report.
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* @param rate rate level value to set on the specified sensor.
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*
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* @return result OK on success;
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* BAD_VALUE if parameter is invalid (for example,
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* rate level is not supported by sensor, etc);
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* INVALID_OPERATION if functionality is not supported.
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* @return token the token used to distinguish sensor events from
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* multiple different sensors of the same type in a
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* single direct channel, or 0 if: (1) no such token
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* may be returned or (2) error (in which case result
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* must be value other than OK).
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*/
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configure(int32_t sensorHandle, RateLevel rate)
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generates (int32_t token, Result result);
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};
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