| /* |
| * 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.media.AudioManager; |
| import android.media.AudioRecordConfiguration; |
| import android.media.AudioSystem; |
| import android.media.IRecordingConfigDispatcher; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| |
| /** |
| * 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>(); |
| |
| private HashMap<Integer, AudioRecordConfiguration> mRecordConfigs = |
| new HashMap<Integer, AudioRecordConfiguration>(); |
| |
| RecordingActivityMonitor() { |
| RecMonitorClient.sMonitor = this; |
| } |
| |
| /** |
| * Implementation of android.media.AudioSystem.AudioRecordingCallback |
| */ |
| public void onRecordingConfigurationChanged(int event, int session, int source) { |
| if (updateSnapshot(event, session, source)) { |
| final Iterator<RecMonitorClient> clientIterator = mClients.iterator(); |
| synchronized(mClients) { |
| while (clientIterator.hasNext()) { |
| try { |
| clientIterator.next().mDispatcherCb.dispatchRecordingConfigChange(); |
| } catch (RemoteException e) { |
| Log.w(TAG, "Could not call dispatchRecordingConfigChange() on client", e); |
| } |
| } |
| } |
| } |
| } |
| |
| void initMonitor() { |
| AudioSystem.setRecordingCallback(this); |
| } |
| |
| void registerRecordingCallback(IRecordingConfigDispatcher rcdb) { |
| if (rcdb == null) { |
| return; |
| } |
| synchronized(mClients) { |
| final RecMonitorClient rmc = new RecMonitorClient(rcdb); |
| if (rmc.init()) { |
| mClients.add(rmc); |
| } |
| } |
| } |
| |
| void unregisterRecordingCallback(IRecordingConfigDispatcher rcdb) { |
| if (rcdb == null) { |
| return; |
| } |
| synchronized(mClients) { |
| final Iterator<RecMonitorClient> clientIterator = mClients.iterator(); |
| while (clientIterator.hasNext()) { |
| RecMonitorClient rmc = clientIterator.next(); |
| if (rcdb.equals(rmc.mDispatcherCb)) { |
| rmc.release(); |
| clientIterator.remove(); |
| break; |
| } |
| } |
| } |
| } |
| |
| AudioRecordConfiguration[] getActiveRecordConfigurations() { |
| synchronized(mRecordConfigs) { |
| return mRecordConfigs.values().toArray(new AudioRecordConfiguration[0]); |
| } |
| } |
| |
| /** |
| * Update the internal "view" of the active recording sessions |
| * @param event |
| * @param session |
| * @param source |
| * @return true if the list of active recording sessions has been modified, false otherwise. |
| */ |
| private boolean updateSnapshot(int event, int session, int source) { |
| synchronized(mRecordConfigs) { |
| switch (event) { |
| case AudioManager.RECORD_CONFIG_EVENT_STOP: |
| // return failure if an unknown recording session stopped |
| return (mRecordConfigs.remove(new Integer(session)) != null); |
| case AudioManager.RECORD_CONFIG_EVENT_START: |
| if (mRecordConfigs.containsKey(new Integer(session))) { |
| // start of session that's already tracked, not worth an update |
| // TO DO in the future when tracking record format: there might be a record |
| // format change during a recording that requires reporting |
| return false; |
| } else { |
| mRecordConfigs.put(new Integer(session), |
| new AudioRecordConfiguration(session, source)); |
| return true; |
| } |
| default: |
| Log.e(TAG, String.format("Unknown event %d for session %d, source %d", |
| event, session, source)); |
| return false; |
| } |
| } |
| } |
| |
| /** |
| * 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; |
| |
| RecMonitorClient(IRecordingConfigDispatcher rcdb) { |
| mDispatcherCb = rcdb; |
| } |
| |
| 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); |
| } |
| } |
| } |