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85 lines
3.2 KiB
85 lines
3.2 KiB
/* |
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* Copyright (C) 2016 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@1.0; |
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import types; |
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import IEvsCamera; |
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import IEvsDisplay; |
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/** |
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* Provides the mechanism for EVS camera discovery |
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*/ |
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interface IEvsEnumerator { |
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/** |
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* Returns a list of all EVS cameras available to the system |
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*/ |
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getCameraList() generates (vec<CameraDesc> cameras); |
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/** |
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* Get the IEvsCamera associated with a cameraId from a CameraDesc |
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* |
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* Given a camera's unique cameraId from CameraDesc, returns the |
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* IEvsCamera interface associated with the specified camera. When |
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* done using the camera, the caller may release it by calling closeCamera(). |
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* Note: Reliance on the sp<> going out of scope is not recommended |
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* because the resources may not be released right away due to asynchronos |
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* behavior in the hardware binder (ref b/36122635). |
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*/ |
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openCamera(string cameraId) generates (IEvsCamera carCamera); |
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/** |
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* Return the specified IEvsCamera interface as no longer in use |
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* |
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* When the IEvsCamera object is no longer required, it must be released. |
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* NOTE: Video streaming must be cleanly stopped before making this call. |
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*/ |
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closeCamera(IEvsCamera carCamera); |
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/** |
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* Get exclusive access to IEvsDisplay for the system |
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* |
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* There can be at most one EVS display object for the system and this function |
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* requests access to it. If the EVS display is not available or is already in use, |
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* a null pointer is returned. |
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* When done using the display, the caller may release it by calling closeDisplay(). |
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* TODO(b/36122635) Reliance on the sp<> going out of scope is not recommended because the |
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* resources may not be released right away due to asynchronos behavior in the hardware binder. |
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*/ |
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openDisplay() generates (IEvsDisplay display); |
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/** |
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* Return the specified IEvsDisplay interface as no longer in use |
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* |
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* When the IEvsDisplay object is no longer required, it must be released. |
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* NOTE: All buffers must have been returned to the display before making this call. |
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*/ |
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closeDisplay(IEvsDisplay display); |
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/** |
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* This call requests the current state of the display |
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* |
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* If there is no open display, this returns DisplayState::NOT_OPEN. otherwise, it returns |
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* the actual state of the active display. This call is replicated on the IEvsEnumerator |
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* interface in order to allow secondary clients to monitor the state of the EVS display |
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* without acquiring exclusive ownership of the display. |
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*/ |
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getDisplayState() generates (DisplayState state); |
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}; |
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