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82 lines
3.2 KiB
82 lines
3.2 KiB
/*
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* Copyright 2020 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.hardware.automotive.evs@1.1;
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import @1.0::EvsResult;
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import UltrasonicsArrayDesc;
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import UltrasonicsDataFrameDesc;
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import IEvsUltrasonicsArrayStream;
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/**
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* HAL interface for ultrasonics sensor array.
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*/
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interface IEvsUltrasonicsArray {
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/**
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* Returns the ultrasonic sensor array information.
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*
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* @return info The description of this ultrasonic array. This must be the
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* same value as reported by IEvsEnumerator::getUltrasonicsArrayList().
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*/
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getUltrasonicArrayInfo() generates (UltrasonicsArrayDesc info);
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/**
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* Specifies the depth of the buffer chain the ultrasonic sensors is
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* asked to support.
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*
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* Up to this many data frames may be held concurrently by the client of IEvsUltrasonicsArray.
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* If this many frames have been delivered to the receiver without being returned
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* by doneWithFrame, the stream must skip frames until a buffer is returned for reuse.
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* It is legal for this call to come at any time, even while streams are already running,
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* in which case buffers should be added or removed from the chain as appropriate.
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* If no call is made to this entry point, the IEvsUltrasonicsArray must support at least one
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* data frame by default. More is acceptable.
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*
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* @param bufferCount Number of buffers the client of
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* IEvsUltrasonicsArray may hold concurrently.
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* @return result EvsResult::OK is returned if this call is successful.
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* Will return EvsResult::INVALID_ARG on invalid bufferCount.
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*/
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setMaxFramesInFlight(uint32_t bufferCount) generates (EvsResult result);
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/**
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* Requests to start the stream.
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*
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* @param stream Implementation of IEvsUltrasonicsArrayStream.
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* @return result EvsResult::OK is returned if this call is successful. Returns
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* EvsResult::STREAM_ALREADY_RUNNING if stream is already running.
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*/
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startStream(IEvsUltrasonicsArrayStream stream) generates (EvsResult result);
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/**
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* Requests to stop the delivery of the ultrasonic array data frames.
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*
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* Because delivery is asynchronous, frames may continue to arrive for
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* some time after this call returns. Each must be returned until the
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* closure of the stream is signaled to the IEvsCameraStream.
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* This function cannot fail and is ignored if the stream isn't running.
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*/
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stopStream();
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/**
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* Notifies the UltrasonicsDataDesc is consumed that was received from
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* IEvsUltrasonicsArrayStream.
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*
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* @param dataFrameDesc Ultrasonics data descriptor.
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*/
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doneWithDataFrame(UltrasonicsDataFrameDesc dataFrameDesc);
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};
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