| /* |
| * 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.AudioFormat; |
| import android.media.AudioManager; |
| import android.media.AudioRecordingConfiguration; |
| import android.media.AudioSystem; |
| import android.media.IRecordingConfigDispatcher; |
| import android.media.MediaRecorder; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import java.util.ArrayList; |
| 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>(); |
| |
| private HashMap<Integer, AudioRecordingConfiguration> mRecordConfigs = |
| new HashMap<Integer, AudioRecordingConfiguration>(); |
| |
| RecordingActivityMonitor() { |
| RecMonitorClient.sMonitor = this; |
| } |
| |
| /** |
| * Implementation of android.media.AudioSystem.AudioRecordingCallback |
| */ |
| public void onRecordingConfigurationChanged(int event, int session, int source, |
| int[] recordingInfo) { |
| if (MediaRecorder.isSystemOnlyAudioSource(source)) { |
| return; |
| } |
| final List<AudioRecordingConfiguration> configs = |
| updateSnapshot(event, session, source, recordingInfo); |
| if (configs != null){ |
| synchronized(mClients) { |
| final Iterator<RecMonitorClient> clientIterator = mClients.iterator(); |
| while (clientIterator.hasNext()) { |
| try { |
| clientIterator.next().mDispatcherCb.dispatchRecordingConfigChange( |
| configs); |
| } 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; |
| } |
| } |
| } |
| } |
| |
| List<AudioRecordingConfiguration> getActiveRecordingConfigurations() { |
| synchronized(mRecordConfigs) { |
| return new ArrayList<AudioRecordingConfiguration>(mRecordConfigs.values()); |
| } |
| } |
| |
| /** |
| * 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[])} |
| * for the definition of the contents of the array |
| * @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 session, int source, |
| int[] recordingInfo) { |
| 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(session)) != 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 sessionKey = new Integer(session); |
| if (mRecordConfigs.containsKey(sessionKey)) { |
| final AudioRecordingConfiguration updatedConfig = |
| new AudioRecordingConfiguration(session, source, |
| clientFormat, deviceFormat, patchHandle); |
| if (updatedConfig.equals(mRecordConfigs.get(sessionKey))) { |
| configChanged = false; |
| } else { |
| // config exists but has been modified |
| mRecordConfigs.remove(sessionKey); |
| mRecordConfigs.put(sessionKey, updatedConfig); |
| configChanged = true; |
| } |
| } else { |
| mRecordConfigs.put(sessionKey, |
| new AudioRecordingConfiguration(session, source, |
| clientFormat, deviceFormat, patchHandle)); |
| configChanged = true; |
| } |
| 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; |
| |
| 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); |
| } |
| } |
| } |