| /* |
| * Copyright (C) 2016 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.audio; |
| |
| import android.content.Context; |
| import android.content.pm.PackageManager; |
| import android.media.AudioFormat; |
| import android.media.AudioManager; |
| import android.media.AudioRecordingConfiguration; |
| import android.media.AudioSystem; |
| import android.media.IRecordingConfigDispatcher; |
| import android.media.MediaRecorder; |
| import android.media.audiofx.AudioEffect; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import java.io.PrintWriter; |
| import java.text.DateFormat; |
| import java.util.ArrayList; |
| import java.util.Date; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| /** |
| * Class to receive and dispatch updates from AudioSystem about recording configurations. |
| */ |
| public final class RecordingActivityMonitor implements AudioSystem.AudioRecordingCallback { |
| |
| public final static String TAG = "AudioService.RecordingActivityMonitor"; |
| |
| private ArrayList<RecMonitorClient> mClients = new ArrayList<RecMonitorClient>(); |
| // a public client is one that needs an anonymized version of the playback configurations, we |
| // keep track of whether there is at least one to know when we need to create the list of |
| // playback configurations that do not contain uid/package name information. |
| private boolean mHasPublicClients = false; |
| |
| private HashMap<Integer, AudioRecordingConfiguration> mRecordConfigs = |
| new HashMap<Integer, AudioRecordingConfiguration>(); |
| |
| private final PackageManager mPackMan; |
| |
| RecordingActivityMonitor(Context ctxt) { |
| RecMonitorClient.sMonitor = this; |
| mPackMan = ctxt.getPackageManager(); |
| } |
| |
| /** |
| * Implementation of android.media.AudioSystem.AudioRecordingCallback |
| */ |
| public void onRecordingConfigurationChanged(int event, int uid, int session, int source, |
| int portId, boolean silenced, int[] recordingInfo, |
| AudioEffect.Descriptor[] clientEffects, |
| AudioEffect.Descriptor[] effects, |
| int activeSource, String packName) { |
| if (MediaRecorder.isSystemOnlyAudioSource(source)) { |
| // still want to log event, it just won't appear in recording configurations |
| sEventLogger.log(new RecordingEvent(event, uid, session, source, packName) |
| .printLog(TAG)); |
| return; |
| } |
| String clientEffectName = clientEffects.length == 0 ? "None" : clientEffects[0].name; |
| String effectName = effects.length == 0 ? "None" : effects[0].name; |
| |
| final List<AudioRecordingConfiguration> configsSystem = |
| updateSnapshot(event, uid, session, source, recordingInfo, |
| portId, silenced, activeSource, clientEffects, effects); |
| if (configsSystem != null){ |
| dispatchCallbacks(configsSystem); |
| } |
| } |
| private void dispatchCallbacks(List<AudioRecordingConfiguration> configs) { |
| synchronized (mClients) { |
| // list of recording configurations for "public consumption". It is only computed if |
| // there are non-system recording activity listeners. |
| final List<AudioRecordingConfiguration> configsPublic = mHasPublicClients |
| ? anonymizeForPublicConsumption(configs) : |
| new ArrayList<AudioRecordingConfiguration>(); |
| final Iterator<RecMonitorClient> clientIterator = mClients.iterator(); |
| while (clientIterator.hasNext()) { |
| final RecMonitorClient rmc = clientIterator.next(); |
| try { |
| if (rmc.mIsPrivileged) { |
| rmc.mDispatcherCb.dispatchRecordingConfigChange(configs); |
| } else { |
| rmc.mDispatcherCb.dispatchRecordingConfigChange(configsPublic); |
| } |
| } catch (RemoteException e) { |
| Log.w(TAG, "Could not call dispatchRecordingConfigChange() on client", e); |
| } |
| } |
| } |
| } |
| |
| protected void dump(PrintWriter pw) { |
| // players |
| pw.println("\nRecordActivityMonitor dump time: " |
| + DateFormat.getTimeInstance().format(new Date())); |
| synchronized(mRecordConfigs) { |
| for (AudioRecordingConfiguration conf : mRecordConfigs.values()) { |
| conf.dump(pw); |
| } |
| } |
| pw.println("\n"); |
| // log |
| sEventLogger.dump(pw); |
| } |
| |
| private ArrayList<AudioRecordingConfiguration> anonymizeForPublicConsumption( |
| List<AudioRecordingConfiguration> sysConfigs) { |
| ArrayList<AudioRecordingConfiguration> publicConfigs = |
| new ArrayList<AudioRecordingConfiguration>(); |
| // only add active anonymized configurations, |
| for (AudioRecordingConfiguration config : sysConfigs) { |
| publicConfigs.add(AudioRecordingConfiguration.anonymizedCopy(config)); |
| } |
| return publicConfigs; |
| } |
| |
| void initMonitor() { |
| AudioSystem.setRecordingCallback(this); |
| } |
| |
| void clear() { |
| synchronized (mRecordConfigs) { |
| mRecordConfigs.clear(); |
| } |
| dispatchCallbacks(new ArrayList<AudioRecordingConfiguration>()); |
| } |
| |
| void registerRecordingCallback(IRecordingConfigDispatcher rcdb, boolean isPrivileged) { |
| if (rcdb == null) { |
| return; |
| } |
| synchronized (mClients) { |
| final RecMonitorClient rmc = new RecMonitorClient(rcdb, isPrivileged); |
| if (rmc.init()) { |
| if (!isPrivileged) { |
| mHasPublicClients = true; |
| } |
| mClients.add(rmc); |
| } |
| } |
| } |
| |
| void unregisterRecordingCallback(IRecordingConfigDispatcher rcdb) { |
| if (rcdb == null) { |
| return; |
| } |
| synchronized (mClients) { |
| final Iterator<RecMonitorClient> clientIterator = mClients.iterator(); |
| boolean hasPublicClients = false; |
| while (clientIterator.hasNext()) { |
| RecMonitorClient rmc = clientIterator.next(); |
| if (rcdb.equals(rmc.mDispatcherCb)) { |
| rmc.release(); |
| clientIterator.remove(); |
| } else { |
| if (!rmc.mIsPrivileged) { |
| hasPublicClients = true; |
| } |
| } |
| } |
| mHasPublicClients = hasPublicClients; |
| } |
| } |
| |
| List<AudioRecordingConfiguration> getActiveRecordingConfigurations(boolean isPrivileged) { |
| synchronized(mRecordConfigs) { |
| if (isPrivileged) { |
| return new ArrayList<AudioRecordingConfiguration>(mRecordConfigs.values()); |
| } else { |
| final List<AudioRecordingConfiguration> configsPublic = |
| anonymizeForPublicConsumption( |
| new ArrayList<AudioRecordingConfiguration>(mRecordConfigs.values())); |
| return configsPublic; |
| } |
| } |
| } |
| |
| /** |
| * Update the internal "view" of the active recording sessions |
| * @param event |
| * @param session |
| * @param source |
| * @param recordingFormat see |
| * {@link AudioSystem.AudioRecordingCallback#onRecordingConfigurationChanged(int, int, int,\ |
| int, int, boolean, int[], AudioEffect.Descriptor[], AudioEffect.Descriptor[], int, String)} |
| * for the definition of the contents of the array |
| * @param portId |
| * @param silenced |
| * @param activeSource |
| * @param clientEffects |
| * @param effects |
| * @return null if the list of active recording sessions has not been modified, a list |
| * with the current active configurations otherwise. |
| */ |
| private List<AudioRecordingConfiguration> updateSnapshot(int event, int uid, int session, |
| int source, int[] recordingInfo, int portId, boolean silenced, int activeSource, |
| AudioEffect.Descriptor[] clientEffects, AudioEffect.Descriptor[] effects) { |
| final boolean configChanged; |
| final ArrayList<AudioRecordingConfiguration> configs; |
| synchronized(mRecordConfigs) { |
| switch (event) { |
| case AudioManager.RECORD_CONFIG_EVENT_STOP: |
| // return failure if an unknown recording session stopped |
| configChanged = (mRecordConfigs.remove(new Integer(portId)) != null); |
| if (configChanged) { |
| sEventLogger.log(new RecordingEvent(event, uid, session, source, null)); |
| } |
| break; |
| case AudioManager.RECORD_CONFIG_EVENT_START: |
| final AudioFormat clientFormat = new AudioFormat.Builder() |
| .setEncoding(recordingInfo[0]) |
| // FIXME this doesn't support index-based masks |
| .setChannelMask(recordingInfo[1]) |
| .setSampleRate(recordingInfo[2]) |
| .build(); |
| final AudioFormat deviceFormat = new AudioFormat.Builder() |
| .setEncoding(recordingInfo[3]) |
| // FIXME this doesn't support index-based masks |
| .setChannelMask(recordingInfo[4]) |
| .setSampleRate(recordingInfo[5]) |
| .build(); |
| final int patchHandle = recordingInfo[6]; |
| final Integer portIdKey = new Integer(portId); |
| |
| final String[] packages = mPackMan.getPackagesForUid(uid); |
| final String packageName; |
| if (packages != null && packages.length > 0) { |
| packageName = packages[0]; |
| } else { |
| packageName = ""; |
| } |
| final AudioRecordingConfiguration updatedConfig = |
| new AudioRecordingConfiguration(uid, session, source, |
| clientFormat, deviceFormat, patchHandle, packageName, |
| portId, silenced, activeSource, clientEffects, effects); |
| |
| if (mRecordConfigs.containsKey(portIdKey)) { |
| if (updatedConfig.equals(mRecordConfigs.get(portIdKey))) { |
| configChanged = false; |
| } else { |
| // config exists but has been modified |
| mRecordConfigs.remove(portIdKey); |
| mRecordConfigs.put(portIdKey, updatedConfig); |
| configChanged = true; |
| } |
| } else { |
| mRecordConfigs.put(portIdKey, updatedConfig); |
| configChanged = true; |
| } |
| if (configChanged) { |
| sEventLogger.log(new RecordingEvent(event, uid, session, source, packageName)); |
| } |
| break; |
| default: |
| Log.e(TAG, String.format("Unknown event %d for session %d, source %d", |
| event, session, source)); |
| configChanged = false; |
| } |
| if (configChanged) { |
| configs = new ArrayList<AudioRecordingConfiguration>(mRecordConfigs.values()); |
| } else { |
| configs = null; |
| } |
| } |
| return configs; |
| } |
| |
| /** |
| * Inner class to track clients that want to be notified of recording updates |
| */ |
| private final static class RecMonitorClient implements IBinder.DeathRecipient { |
| |
| // can afford to be static because only one RecordingActivityMonitor ever instantiated |
| static RecordingActivityMonitor sMonitor; |
| |
| final IRecordingConfigDispatcher mDispatcherCb; |
| final boolean mIsPrivileged; |
| |
| RecMonitorClient(IRecordingConfigDispatcher rcdb, boolean isPrivileged) { |
| mDispatcherCb = rcdb; |
| mIsPrivileged = isPrivileged; |
| } |
| |
| public void binderDied() { |
| Log.w(TAG, "client died"); |
| sMonitor.unregisterRecordingCallback(mDispatcherCb); |
| } |
| |
| boolean init() { |
| try { |
| mDispatcherCb.asBinder().linkToDeath(this, 0); |
| return true; |
| } catch (RemoteException e) { |
| Log.w(TAG, "Could not link to client death", e); |
| return false; |
| } |
| } |
| |
| void release() { |
| mDispatcherCb.asBinder().unlinkToDeath(this, 0); |
| } |
| } |
| |
| /** |
| * Inner class for recording event logging |
| */ |
| private static final class RecordingEvent extends AudioEventLogger.Event { |
| private final int mRecEvent; |
| private final int mClientUid; |
| private final int mSession; |
| private final int mSource; |
| private final String mPackName; |
| |
| RecordingEvent(int event, int uid, int session, int source, String packName) { |
| mRecEvent = event; |
| mClientUid = uid; |
| mSession = session; |
| mSource = source; |
| mPackName = packName; |
| } |
| |
| @Override |
| public String eventToString() { |
| return new StringBuilder("rec ").append( |
| mRecEvent == AudioManager.RECORD_CONFIG_EVENT_START ? "start" : "stop ") |
| .append(" uid:").append(mClientUid) |
| .append(" session:").append(mSession) |
| .append(" src:").append(MediaRecorder.toLogFriendlyAudioSource(mSource)) |
| .append(mPackName == null ? "" : " pack:" + mPackName).toString(); |
| } |
| } |
| |
| private static final AudioEventLogger sEventLogger = new AudioEventLogger(50, |
| "recording activity as reported through AudioSystem.AudioRecordingCallback"); |
| } |