1 /* 2 * Copyright 2018 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.media; 18 19 import android.content.BroadcastReceiver; 20 import android.content.Context; 21 import android.content.Intent; 22 import android.content.IntentFilter; 23 import android.content.pm.ApplicationInfo; 24 import android.content.pm.PackageManager; 25 import android.media.IMediaExtractorUpdateService; 26 import android.os.Build; 27 import android.os.IBinder; 28 import android.os.Handler; 29 import android.os.PatternMatcher; 30 import android.os.ServiceManager; 31 import android.os.SystemProperties; 32 import android.os.UserHandle; 33 import android.text.TextUtils; 34 import android.util.Log; 35 import android.util.Slog; 36 import com.android.server.SystemService; 37 38 /** This class provides a system service that manages media framework updates. */ 39 public class MediaUpdateService extends SystemService { 40 private static final String TAG = "MediaUpdateService"; 41 private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG); 42 private static final String MEDIA_UPDATE_PACKAGE_NAME = 43 SystemProperties.get("ro.mediacomponents.package"); 44 private static final String EXTRACTOR_UPDATE_SERVICE_NAME = "media.extractor.update"; 45 46 private IMediaExtractorUpdateService mMediaExtractorUpdateService; 47 final Handler mHandler; 48 49 public MediaUpdateService(Context context) { 50 super(context); 51 mHandler = new Handler(); 52 } 53 54 @Override 55 public void onStart() { 56 if (("userdebug".equals(android.os.Build.TYPE) || "eng".equals(android.os.Build.TYPE)) 57 && !TextUtils.isEmpty(MEDIA_UPDATE_PACKAGE_NAME)) { 58 connect(); 59 registerBroadcastReceiver(); 60 } 61 } 62 63 private void connect() { 64 IBinder binder = ServiceManager.getService(EXTRACTOR_UPDATE_SERVICE_NAME); 65 if (binder != null) { 66 try { 67 binder.linkToDeath(new IBinder.DeathRecipient() { 68 @Override 69 public void binderDied() { 70 Slog.w(TAG, "mediaextractor died; reconnecting"); 71 mMediaExtractorUpdateService = null; 72 connect(); 73 } 74 }, 0); 75 } catch (Exception e) { 76 binder = null; 77 } 78 } 79 if (binder != null) { 80 mMediaExtractorUpdateService = IMediaExtractorUpdateService.Stub.asInterface(binder); 81 mHandler.post(new Runnable() { 82 @Override 83 public void run() { 84 packageStateChanged(); 85 } 86 }); 87 } else { 88 Slog.w(TAG, EXTRACTOR_UPDATE_SERVICE_NAME + " not found."); 89 } 90 } 91 92 private void registerBroadcastReceiver() { 93 BroadcastReceiver updateReceiver = new BroadcastReceiver() { 94 @Override 95 public void onReceive(Context context, Intent intent) { 96 if (intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_SYSTEM) 97 != UserHandle.USER_SYSTEM) { 98 // Ignore broadcast for non system users. We don't want to update system 99 // service multiple times. 100 return; 101 } 102 switch (intent.getAction()) { 103 case Intent.ACTION_PACKAGE_REMOVED: 104 if (intent.getExtras().getBoolean(Intent.EXTRA_REPLACING)) { 105 // The existing package is updated. Will be handled with the 106 // following ACTION_PACKAGE_ADDED case. 107 return; 108 } 109 packageStateChanged(); 110 break; 111 case Intent.ACTION_PACKAGE_CHANGED: 112 packageStateChanged(); 113 break; 114 case Intent.ACTION_PACKAGE_ADDED: 115 packageStateChanged(); 116 break; 117 } 118 } 119 }; 120 IntentFilter filter = new IntentFilter(); 121 filter.addAction(Intent.ACTION_PACKAGE_ADDED); 122 filter.addAction(Intent.ACTION_PACKAGE_REMOVED); 123 filter.addAction(Intent.ACTION_PACKAGE_CHANGED); 124 filter.addDataScheme("package"); 125 filter.addDataSchemeSpecificPart(MEDIA_UPDATE_PACKAGE_NAME, PatternMatcher.PATTERN_LITERAL); 126 127 getContext().registerReceiverAsUser(updateReceiver, UserHandle.ALL, filter, 128 null /* broadcast permission */, null /* handler */); 129 } 130 131 private void packageStateChanged() { 132 ApplicationInfo packageInfo = null; 133 boolean pluginsAvailable = false; 134 try { 135 packageInfo = getContext().getPackageManager().getApplicationInfo( 136 MEDIA_UPDATE_PACKAGE_NAME, PackageManager.MATCH_SYSTEM_ONLY); 137 pluginsAvailable = packageInfo.enabled; 138 } catch (Exception e) { 139 Slog.v(TAG, "package '" + MEDIA_UPDATE_PACKAGE_NAME + "' not installed"); 140 } 141 if (packageInfo != null && Build.VERSION.SDK_INT != packageInfo.targetSdkVersion) { 142 Slog.w(TAG, "This update package is not for this platform version. Ignoring. " 143 + "platform:" + Build.VERSION.SDK_INT 144 + " targetSdk:" + packageInfo.targetSdkVersion); 145 pluginsAvailable = false; 146 } 147 loadExtractorPlugins( 148 (packageInfo != null && pluginsAvailable) ? packageInfo.sourceDir : ""); 149 } 150 151 private void loadExtractorPlugins(String apkPath) { 152 try { 153 if (mMediaExtractorUpdateService != null) { 154 mMediaExtractorUpdateService.loadPlugins(apkPath); 155 } 156 } catch (Exception e) { 157 Slog.w(TAG, "Error in loadPlugins", e); 158 } 159 } 160 } 161