1 /* 2 * Copyright (C) 2021 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.car.evs; 18 19 import android.car.evs.CarEvsBufferDescriptor; 20 import android.car.evs.CarEvsStatus; 21 import android.car.evs.ICarEvsStatusListener; 22 import android.car.evs.ICarEvsStreamCallback; 23 import android.os.IBinder; 24 25 /** 26 * @hide 27 */ 28 interface ICarEvsService { 29 30 /** 31 * Registers a listener to receive changes in CarEvsManager's status. 32 */ registerStatusListener(in ICarEvsStatusListener listener)33 void registerStatusListener(in ICarEvsStatusListener listener); 34 35 /** 36 * Unregisters a service listener. 37 */ unregisterStatusListener(in ICarEvsStatusListener listener)38 void unregisterStatusListener(in ICarEvsStatusListener listener); 39 40 /** 41 * Requests to start a video stream. 42 */ startVideoStream(int serviceType, in IBinder token, in ICarEvsStreamCallback callback)43 int startVideoStream(int serviceType, in IBinder token, in ICarEvsStreamCallback callback); 44 45 /** 46 * Requests to stop an active video stream. 47 */ stopVideoStream(in ICarEvsStreamCallback callback)48 void stopVideoStream(in ICarEvsStreamCallback callback); 49 50 /** 51 * Returns the buffer when its usages are done. 52 */ returnFrameBuffer(in CarEvsBufferDescriptor buffer)53 void returnFrameBuffer(in CarEvsBufferDescriptor buffer); 54 55 /** 56 * Returns a current status of CarEvsService. 57 */ getCurrentStatus()58 CarEvsStatus getCurrentStatus(); 59 60 /** 61 * Returns a generated session token. 62 */ generateSessionToken()63 IBinder generateSessionToken(); 64 65 /** 66 * Requests to start a camera previewing activity for a given service type. 67 */ startActivity(int type)68 int startActivity(int type); 69 70 /** 71 * Requests to stop a camera previewing activity, which was launched via startActivity(). 72 */ stopActivity()73 void stopActivity(); 74 75 /** 76 * Returns whether or not a given service type is supported. 77 */ isSupported(int type)78 boolean isSupported(int type); 79 } 80