Tomasz Wasilczyk | f151a7b | 2018-01-11 16:03:46 -0800 | [diff] [blame] | 1 | /** |
| 2 | * Copyright (C) 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.broadcastradio.hal2; |
| 18 | |
| 19 | import android.annotation.NonNull; |
| 20 | import android.annotation.Nullable; |
| 21 | import android.hardware.radio.Announcement; |
| 22 | import android.hardware.radio.IAnnouncementListener; |
| 23 | import android.hardware.radio.ICloseHandle; |
| 24 | import android.os.IBinder; |
| 25 | import android.os.RemoteException; |
| 26 | import android.util.Slog; |
| 27 | |
| 28 | import com.android.internal.annotations.GuardedBy; |
| 29 | |
| 30 | import java.util.ArrayList; |
| 31 | import java.util.Collection; |
| 32 | import java.util.List; |
| 33 | import java.util.Objects; |
| 34 | |
| 35 | public class AnnouncementAggregator extends ICloseHandle.Stub { |
| 36 | private static final String TAG = "BcRadio2Srv.AnnAggr"; |
| 37 | |
| 38 | private final Object mLock = new Object(); |
| 39 | @NonNull private final IAnnouncementListener mListener; |
| 40 | private final IBinder.DeathRecipient mDeathRecipient = new DeathRecipient(); |
| 41 | |
| 42 | @GuardedBy("mLock") |
| 43 | private final Collection<ModuleWatcher> mModuleWatchers = new ArrayList<>(); |
| 44 | |
| 45 | @GuardedBy("mLock") |
| 46 | private boolean mIsClosed = false; |
| 47 | |
| 48 | public AnnouncementAggregator(@NonNull IAnnouncementListener listener) { |
| 49 | mListener = Objects.requireNonNull(listener); |
| 50 | try { |
| 51 | listener.asBinder().linkToDeath(mDeathRecipient, 0); |
| 52 | } catch (RemoteException ex) { |
| 53 | ex.rethrowFromSystemServer(); |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | private class ModuleWatcher extends IAnnouncementListener.Stub { |
| 58 | private @Nullable ICloseHandle mCloseHandle; |
| 59 | public @NonNull List<Announcement> currentList = new ArrayList<>(); |
| 60 | |
| 61 | public void onListUpdated(List<Announcement> active) { |
| 62 | currentList = Objects.requireNonNull(active); |
| 63 | AnnouncementAggregator.this.onListUpdated(); |
| 64 | } |
| 65 | |
| 66 | public void setCloseHandle(@NonNull ICloseHandle closeHandle) { |
| 67 | mCloseHandle = Objects.requireNonNull(closeHandle); |
| 68 | } |
| 69 | |
| 70 | public void close() throws RemoteException { |
| 71 | if (mCloseHandle != null) mCloseHandle.close(); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | private class DeathRecipient implements IBinder.DeathRecipient { |
| 76 | public void binderDied() { |
| 77 | try { |
| 78 | close(); |
| 79 | } catch (RemoteException ex) {} |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | private void onListUpdated() { |
| 84 | synchronized (mLock) { |
| 85 | if (mIsClosed) { |
| 86 | Slog.e(TAG, "Announcement aggregator is closed, it shouldn't receive callbacks"); |
| 87 | return; |
| 88 | } |
| 89 | List<Announcement> combined = new ArrayList<>(); |
| 90 | for (ModuleWatcher watcher : mModuleWatchers) { |
| 91 | combined.addAll(watcher.currentList); |
| 92 | } |
| 93 | TunerCallback.dispatch(() -> mListener.onListUpdated(combined)); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | public void watchModule(@NonNull RadioModule module, @NonNull int[] enabledTypes) { |
| 98 | synchronized (mLock) { |
| 99 | if (mIsClosed) throw new IllegalStateException(); |
| 100 | |
| 101 | ModuleWatcher watcher = new ModuleWatcher(); |
| 102 | ICloseHandle closeHandle; |
| 103 | try { |
| 104 | closeHandle = module.addAnnouncementListener(enabledTypes, watcher); |
| 105 | } catch (RemoteException ex) { |
| 106 | Slog.e(TAG, "Failed to add announcement listener", ex); |
| 107 | return; |
| 108 | } |
| 109 | watcher.setCloseHandle(closeHandle); |
| 110 | mModuleWatchers.add(watcher); |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | @Override |
| 115 | public void close() throws RemoteException { |
| 116 | synchronized (mLock) { |
| 117 | if (mIsClosed) return; |
| 118 | mIsClosed = true; |
| 119 | |
| 120 | mListener.asBinder().unlinkToDeath(mDeathRecipient, 0); |
| 121 | |
| 122 | for (ModuleWatcher watcher : mModuleWatchers) { |
| 123 | watcher.close(); |
| 124 | } |
| 125 | mModuleWatchers.clear(); |
| 126 | } |
| 127 | } |
| 128 | } |