automotive/evs/1.1/IEvsEnumerator.hal

/*
 * Copyright (C) 2019 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.automotive.evs@1.1;

import IEvsCamera;
import @1.0::IEvsEnumerator;
import @1.0::EvsResult;
import android.hardware.camera.device@3.2::Stream;

/**
 * Provides the mechanism for EVS camera discovery
 */
interface IEvsEnumerator extends @1.0::IEvsEnumerator {
    /**
     * Returns a list of all EVS cameras available to the system
     *
     * @return cameras A list of cameras availale for EVS service.
     */
    getCameraList_1_1() generates (vec<CameraDesc> cameras);

    /**
     * Gets the IEvsCamera associated with a cameraId from a CameraDesc
     *
     * Given a camera's unique cameraId from CameraDesc, returns the
     * IEvsCamera interface associated with the specified camera. When
     * done using the camera, the caller may release it by calling closeCamera().
     *
     * @param  cameraId  A unique identifier of the camera.
     * @param  streamCfg A stream configuration the client wants to use.
     * @return evsCamera EvsCamera object associated with a given cameraId.
     *                   Returned object would be null if a camera device does
     *                   not support a given stream configuration or is already
     *                   configured differently by another client.
     */
    openCamera_1_1(string cameraId, Stream streamCfg) generates (IEvsCamera evsCamera);

    /**
     * Tells whether this is EVS manager or HAL implementation.
     *
     * @return result False for EVS manager implementations and true for all others.
     */
    isHardware() generates (bool result);
};