Add MediaUpdateService in SystemServer

Test: play mp4 file and install & uninstall media update apk.
Bug: 67908547
Change-Id: I17f91a85994da9a43e08734f7e79311bee62eab1

services/core/Android.bp

@@ -16,6 +16,7 @@ java_library_static {
         ":installd_aidl",
         ":storaged_aidl",
         ":vold_aidl",
+        ":mediaupdateservice_aidl",
         "java/com/android/server/EventLogTags.logtags",
         "java/com/android/server/am/EventLogTags.logtags",
     ],

services/core/java/com/android/server/media/MediaUpdateService.java

@@ -0,0 +1,146 @@
+/*
+ * Copyright 2018 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 com.android.server.media;
+
+import android.content.Context;
+import android.content.Intent;
+import android.media.IMediaResourceMonitor;
+import android.os.Binder;
+import android.os.UserHandle;
+import android.os.UserManager;
+import android.util.Log;
+import android.util.Slog;
+import com.android.server.SystemService;
+
+import android.content.BroadcastReceiver;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.os.IBinder;
+import android.os.PatternMatcher;
+import android.os.ServiceManager;
+import android.media.IMediaExtractorUpdateService;
+
+import java.lang.Exception;
+
+/** This class provides a system service that manages media framework updates. */
+public class MediaUpdateService extends SystemService {
+    private static final String TAG = "MediaUpdateService";
+    private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
+    private static final String MEDIA_UPDATE_PACKAGE_NAME = "com.android.media.update";
+    private static final String EXTRACTOR_UPDATE_SERVICE_NAME = "media.extractor.update";
+
+    private IMediaExtractorUpdateService mMediaExtractorUpdateService;
+
+    public MediaUpdateService(Context context) {
+        super(context);
+    }
+
+    @Override
+    public void onStart() {
+        connect();
+        registerBroadcastReceiver();
+    }
+
+    private void connect() {
+        IBinder binder = ServiceManager.getService(EXTRACTOR_UPDATE_SERVICE_NAME);
+        if (binder != null) {
+            try {
+                binder.linkToDeath(new IBinder.DeathRecipient() {
+                    @Override
+                    public void binderDied() {
+                        Slog.w(TAG, "mediaextractor died; reconnecting");
+                        mMediaExtractorUpdateService = null;
+                        connect();
+                    }
+                }, 0);
+            } catch (Exception e) {
+                binder = null;
+            }
+        }
+        if (binder != null) {
+            mMediaExtractorUpdateService = IMediaExtractorUpdateService.Stub.asInterface(binder);
+            packageStateChanged();
+        } else {
+            Slog.w(TAG, EXTRACTOR_UPDATE_SERVICE_NAME + " not found.");
+        }
+    }
+
+    private void registerBroadcastReceiver() {
+        BroadcastReceiver updateReceiver = new BroadcastReceiver() {
+                @Override
+                public void onReceive(Context context, Intent intent) {
+                    if (intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_SYSTEM)
+                            != UserHandle.USER_SYSTEM) {
+                        // Ignore broadcast for non system users. We don't want to update system
+                        // service multiple times.
+                        return;
+                    }
+                    switch (intent.getAction()) {
+                        case Intent.ACTION_PACKAGE_REMOVED:
+                            if (intent.getExtras().getBoolean(Intent.EXTRA_REPLACING)) {
+                                // The existing package is updated. Will be handled with the
+                                // following ACTION_PACKAGE_ADDED case.
+                                return;
+                            }
+                            packageStateChanged();
+                            break;
+                        case Intent.ACTION_PACKAGE_CHANGED:
+                            packageStateChanged();
+                            break;
+                        case Intent.ACTION_PACKAGE_ADDED:
+                            packageStateChanged();
+                            break;
+                    }
+                }
+        };
+        IntentFilter filter = new IntentFilter();
+        filter.addAction(Intent.ACTION_PACKAGE_ADDED);
+        filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
+        filter.addAction(Intent.ACTION_PACKAGE_CHANGED);
+        filter.addDataScheme("package");
+        filter.addDataSchemeSpecificPart(MEDIA_UPDATE_PACKAGE_NAME, PatternMatcher.PATTERN_LITERAL);
+
+        getContext().registerReceiverAsUser(updateReceiver, UserHandle.ALL, filter,
+                null /* broadcast permission */, null /* handler */);
+    }
+
+    private void packageStateChanged() {
+        ApplicationInfo packageInfo = null;
+        boolean pluginsAvailable = false;
+        try {
+            packageInfo = getContext().getPackageManager().getApplicationInfo(
+                    MEDIA_UPDATE_PACKAGE_NAME, PackageManager.MATCH_SYSTEM_ONLY);
+            pluginsAvailable = packageInfo.enabled;
+        } catch (Exception e) {
+            Slog.v(TAG, "package '" + MEDIA_UPDATE_PACKAGE_NAME + "' not installed");
+        }
+        loadExtractorPlugins(
+                (packageInfo != null && pluginsAvailable) ? packageInfo.sourceDir : "");
+    }
+
+    private void loadExtractorPlugins(String apkPath) {
+        try {
+            if (mMediaExtractorUpdateService != null) {
+                mMediaExtractorUpdateService.loadPlugins(apkPath);
+            }
+        } catch (Exception e) {
+            Slog.w(TAG, "Error in loadPlugins", e);
+        }
+    }
+}

services/java/com/android/server/SystemServer.java

@@ -80,6 +80,7 @@ import com.android.server.job.JobSchedulerService;
 import com.android.server.lights.LightsService;
 import com.android.server.media.MediaResourceMonitorService;
 import com.android.server.media.MediaRouterService;
+import com.android.server.media.MediaUpdateService;
 import com.android.server.media.MediaSessionService;
 import com.android.server.media.projection.MediaProjectionManagerService;
 import com.android.server.net.NetworkPolicyManagerService;
@@ -1442,6 +1443,10 @@ public final class SystemServer {
             mSystemServiceManager.startService(MediaSessionService.class);
             traceEnd();
 
+            traceBeginAndSlog("StartMediaUpdateService");
+            mSystemServiceManager.startService(MediaUpdateService.class);
+            traceEnd();
+
             if (mPackageManager.hasSystemFeature(PackageManager.FEATURE_HDMI_CEC)) {
                 traceBeginAndSlog("StartHdmiControlService");
                 mSystemServiceManager.startService(HdmiControlService.class);