1 /* 2 * Copyright (C) 2024 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 com.android.server.wm; 18 19 import android.annotation.NonNull; 20 import android.annotation.Nullable; 21 import android.util.ArrayMap; 22 23 import java.util.Map; 24 25 /** 26 * Bidirectional mapping (1:1) for the currently active cameraId and the app package that opened it. 27 * 28 * <p>This class is not thread-safe. 29 */ 30 final class CameraIdPackageNameBiMapping { 31 private final Map<String, String> mPackageToCameraIdMap = new ArrayMap<>(); 32 private final Map<String, String> mCameraIdToPackageMap = new ArrayMap<>(); 33 isEmpty()34 boolean isEmpty() { 35 return mCameraIdToPackageMap.isEmpty(); 36 } 37 put(@onNull String packageName, @NonNull String cameraId)38 void put(@NonNull String packageName, @NonNull String cameraId) { 39 // Always using the last connected camera ID for the package even for the concurrent 40 // camera use case since we can't guess which camera is more important anyway. 41 removePackageName(packageName); 42 removeCameraId(cameraId); 43 mPackageToCameraIdMap.put(packageName, cameraId); 44 mCameraIdToPackageMap.put(cameraId, packageName); 45 } 46 containsPackageName(@onNull String packageName)47 boolean containsPackageName(@NonNull String packageName) { 48 return mPackageToCameraIdMap.containsKey(packageName); 49 } 50 51 @Nullable getCameraId(@onNull String packageName)52 String getCameraId(@NonNull String packageName) { 53 return mPackageToCameraIdMap.get(packageName); 54 } 55 removeCameraId(@onNull String cameraId)56 void removeCameraId(@NonNull String cameraId) { 57 final String packageName = mCameraIdToPackageMap.get(cameraId); 58 if (packageName == null) { 59 return; 60 } 61 mPackageToCameraIdMap.remove(packageName, cameraId); 62 mCameraIdToPackageMap.remove(cameraId, packageName); 63 } 64 65 @NonNull getSummaryForDisplayRotationHistoryRecord()66 String getSummaryForDisplayRotationHistoryRecord() { 67 return "{ mPackageToCameraIdMap=" + mPackageToCameraIdMap + " }"; 68 } 69 removePackageName(@onNull String packageName)70 private void removePackageName(@NonNull String packageName) { 71 String cameraId = mPackageToCameraIdMap.get(packageName); 72 if (cameraId == null) { 73 return; 74 } 75 mPackageToCameraIdMap.remove(packageName, cameraId); 76 mCameraIdToPackageMap.remove(cameraId, packageName); 77 } 78 } 79