Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [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 android.telephony; |
| 18 | |
| 19 | import android.annotation.NonNull; |
| 20 | import android.annotation.Nullable; |
| 21 | import android.annotation.SdkConstant; |
| 22 | import android.annotation.SystemApi; |
| 23 | import android.annotation.TestApi; |
| 24 | import android.content.ComponentName; |
| 25 | import android.content.Context; |
| 26 | import android.content.ServiceConnection; |
| 27 | import android.os.IBinder; |
| 28 | import android.os.RemoteException; |
| 29 | import android.telephony.mbms.GroupCall; |
| 30 | import android.telephony.mbms.GroupCallCallback; |
| 31 | import android.telephony.mbms.InternalGroupCallCallback; |
| 32 | import android.telephony.mbms.InternalGroupCallSessionCallback; |
| 33 | import android.telephony.mbms.MbmsErrors; |
| 34 | import android.telephony.mbms.MbmsGroupCallSessionCallback; |
| 35 | import android.telephony.mbms.MbmsUtils; |
| 36 | import android.telephony.mbms.vendor.IMbmsGroupCallService; |
| 37 | import android.util.ArraySet; |
| 38 | import android.util.Log; |
| 39 | |
Hall Liu | c81cba4 | 2018-10-08 18:23:53 -0700 | [diff] [blame] | 40 | import java.util.List; |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 41 | import java.util.Set; |
| 42 | import java.util.concurrent.Executor; |
| 43 | import java.util.concurrent.atomic.AtomicBoolean; |
| 44 | import java.util.concurrent.atomic.AtomicReference; |
| 45 | |
| 46 | /** |
| 47 | * This class provides functionality for accessing group call functionality over MBMS. |
| 48 | */ |
| 49 | public class MbmsGroupCallSession implements AutoCloseable { |
| 50 | private static final String LOG_TAG = "MbmsGroupCallSession"; |
| 51 | |
| 52 | /** |
| 53 | * Service action which must be handled by the middleware implementing the MBMS group call |
| 54 | * interface. |
| 55 | * @hide |
| 56 | */ |
| 57 | @SystemApi |
| 58 | @SdkConstant(SdkConstant.SdkConstantType.SERVICE_ACTION) |
| 59 | public static final String MBMS_GROUP_CALL_SERVICE_ACTION = |
| 60 | "android.telephony.action.EmbmsGroupCall"; |
| 61 | |
| 62 | /** |
| 63 | * Metadata key that specifies the component name of the service to bind to for group calls. |
| 64 | * @hide |
| 65 | */ |
| 66 | @TestApi |
| 67 | public static final String MBMS_GROUP_CALL_SERVICE_OVERRIDE_METADATA = |
| 68 | "mbms-group-call-service-override"; |
| 69 | |
| 70 | private static AtomicBoolean sIsInitialized = new AtomicBoolean(false); |
| 71 | |
| 72 | private AtomicReference<IMbmsGroupCallService> mService = new AtomicReference<>(null); |
| 73 | private IBinder.DeathRecipient mDeathRecipient = new IBinder.DeathRecipient() { |
| 74 | @Override |
| 75 | public void binderDied() { |
| 76 | sIsInitialized.set(false); |
| 77 | mInternalCallback.onError(MbmsErrors.ERROR_MIDDLEWARE_LOST, |
| 78 | "Received death notification"); |
| 79 | } |
| 80 | }; |
| 81 | |
| 82 | private InternalGroupCallSessionCallback mInternalCallback; |
Hall Liu | 718986d | 2019-08-29 15:42:47 -0700 | [diff] [blame] | 83 | private ServiceConnection mServiceConnection; |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 84 | private Set<GroupCall> mKnownActiveGroupCalls = new ArraySet<>(); |
| 85 | |
| 86 | private final Context mContext; |
| 87 | private int mSubscriptionId; |
| 88 | |
| 89 | /** @hide */ |
| 90 | private MbmsGroupCallSession(Context context, Executor executor, int subscriptionId, |
| 91 | MbmsGroupCallSessionCallback callback) { |
| 92 | mContext = context; |
| 93 | mSubscriptionId = subscriptionId; |
| 94 | mInternalCallback = new InternalGroupCallSessionCallback(callback, executor); |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Create a new {@link MbmsGroupCallSession} using the given subscription ID. |
| 99 | * |
| 100 | * You may only have one instance of {@link MbmsGroupCallSession} per UID. If you call this |
| 101 | * method while there is an active instance of {@link MbmsGroupCallSession} in your process |
| 102 | * (in other words, one that has not had {@link #close()} called on it), this method will |
| 103 | * throw an {@link IllegalStateException}. If you call this method in a different process |
| 104 | * running under the same UID, an error will be indicated via |
| 105 | * {@link MbmsGroupCallSessionCallback#onError(int, String)}. |
| 106 | * |
| 107 | * Note that initialization may fail asynchronously. If you wish to try again after you |
| 108 | * receive such an asynchronous error, you must call {@link #close()} on the instance of |
| 109 | * {@link MbmsGroupCallSession} that you received before calling this method again. |
| 110 | * |
| 111 | * @param context The {@link Context} to use. |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 112 | * @param subscriptionId The subscription ID to use. |
Hall Liu | c81cba4 | 2018-10-08 18:23:53 -0700 | [diff] [blame] | 113 | * @param executor The executor on which you wish to execute callbacks. |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 114 | * @param callback A callback object on which you wish to receive results of asynchronous |
| 115 | * operations. |
| 116 | * @return An instance of {@link MbmsGroupCallSession}, or null if an error occurred. |
| 117 | */ |
| 118 | public static @Nullable MbmsGroupCallSession create(@NonNull Context context, |
Hall Liu | c81cba4 | 2018-10-08 18:23:53 -0700 | [diff] [blame] | 119 | int subscriptionId, @NonNull Executor executor, |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 120 | final @NonNull MbmsGroupCallSessionCallback callback) { |
| 121 | if (!sIsInitialized.compareAndSet(false, true)) { |
| 122 | throw new IllegalStateException("Cannot create two instances of MbmsGroupCallSession"); |
| 123 | } |
| 124 | MbmsGroupCallSession session = new MbmsGroupCallSession(context, executor, |
| 125 | subscriptionId, callback); |
| 126 | |
| 127 | final int result = session.bindAndInitialize(); |
| 128 | if (result != MbmsErrors.SUCCESS) { |
| 129 | sIsInitialized.set(false); |
| 130 | executor.execute(new Runnable() { |
| 131 | @Override |
| 132 | public void run() { |
| 133 | callback.onError(result, null); |
| 134 | } |
| 135 | }); |
| 136 | return null; |
| 137 | } |
| 138 | return session; |
| 139 | } |
| 140 | |
| 141 | /** |
| 142 | * Create a new {@link MbmsGroupCallSession} using the system default data subscription ID. |
Hall Liu | c81cba4 | 2018-10-08 18:23:53 -0700 | [diff] [blame] | 143 | * See {@link #create(Context, int, Executor, MbmsGroupCallSessionCallback)}. |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 144 | */ |
Hall Liu | b22bfe4 | 2019-03-04 17:44:27 -0800 | [diff] [blame] | 145 | public static @Nullable MbmsGroupCallSession create(@NonNull Context context, |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 146 | @NonNull Executor executor, @NonNull MbmsGroupCallSessionCallback callback) { |
Hall Liu | c81cba4 | 2018-10-08 18:23:53 -0700 | [diff] [blame] | 147 | return create(context, SubscriptionManager.getDefaultSubscriptionId(), executor, callback); |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Terminates this instance. Also terminates |
| 152 | * any group calls spawned from this instance as if |
| 153 | * {@link GroupCall#close()} had been called on them. After this method returns, |
| 154 | * no further callbacks originating from the middleware will be enqueued on the provided |
| 155 | * instance of {@link MbmsGroupCallSessionCallback}, but callbacks that have already been |
| 156 | * enqueued will still be delivered. |
| 157 | * |
Hall Liu | c81cba4 | 2018-10-08 18:23:53 -0700 | [diff] [blame] | 158 | * It is safe to call {@link #create(Context, int, Executor, MbmsGroupCallSessionCallback)} to |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 159 | * obtain another instance of {@link MbmsGroupCallSession} immediately after this method |
| 160 | * returns. |
| 161 | * |
| 162 | * May throw an {@link IllegalStateException} |
| 163 | */ |
| 164 | public void close() { |
| 165 | try { |
| 166 | IMbmsGroupCallService groupCallService = mService.get(); |
Hall Liu | 718986d | 2019-08-29 15:42:47 -0700 | [diff] [blame] | 167 | if (groupCallService == null || mServiceConnection == null) { |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 168 | // Ignore and return, assume already disposed. |
| 169 | return; |
| 170 | } |
| 171 | groupCallService.dispose(mSubscriptionId); |
| 172 | for (GroupCall s : mKnownActiveGroupCalls) { |
| 173 | s.getCallback().stop(); |
| 174 | } |
| 175 | mKnownActiveGroupCalls.clear(); |
Hall Liu | 718986d | 2019-08-29 15:42:47 -0700 | [diff] [blame] | 176 | mContext.unbindService(mServiceConnection); |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 177 | } catch (RemoteException e) { |
| 178 | // Ignore for now |
| 179 | } finally { |
| 180 | mService.set(null); |
| 181 | sIsInitialized.set(false); |
Hall Liu | 718986d | 2019-08-29 15:42:47 -0700 | [diff] [blame] | 182 | mServiceConnection = null; |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 183 | mInternalCallback.stop(); |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * Starts the requested group call, reporting status to the indicated callback. |
| 189 | * Returns an object used to control that call. |
| 190 | * |
| 191 | * May throw an {@link IllegalArgumentException} or an {@link IllegalStateException} |
| 192 | * |
| 193 | * Asynchronous errors through the callback include any of the errors in |
| 194 | * {@link MbmsErrors.GeneralErrors}. |
| 195 | * |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 196 | * @param tmgi The TMGI, an identifier for the group call you want to join. |
Hall Liu | c81cba4 | 2018-10-08 18:23:53 -0700 | [diff] [blame] | 197 | * @param saiList A list of SAIs for the group call that should be negotiated separately with |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 198 | * the carrier. |
Hall Liu | c81cba4 | 2018-10-08 18:23:53 -0700 | [diff] [blame] | 199 | * @param frequencyList A lost of frequencies for the group call that should be negotiated |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 200 | * separately with the carrier. |
Hall Liu | c81cba4 | 2018-10-08 18:23:53 -0700 | [diff] [blame] | 201 | * @param executor The executor on which you wish to execute callbacks for this stream. |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 202 | * @param callback The callback that you want to receive information about the call on. |
| 203 | * @return An instance of {@link GroupCall} through which the call can be controlled. |
| 204 | * May be {@code null} if an error occurred. |
| 205 | */ |
Hall Liu | c81cba4 | 2018-10-08 18:23:53 -0700 | [diff] [blame] | 206 | public @Nullable GroupCall startGroupCall(long tmgi, @NonNull List<Integer> saiList, |
| 207 | @NonNull List<Integer> frequencyList, @NonNull Executor executor, |
| 208 | @NonNull GroupCallCallback callback) { |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 209 | IMbmsGroupCallService groupCallService = mService.get(); |
| 210 | if (groupCallService == null) { |
| 211 | throw new IllegalStateException("Middleware not yet bound"); |
| 212 | } |
| 213 | |
| 214 | InternalGroupCallCallback serviceCallback = new InternalGroupCallCallback( |
| 215 | callback, executor); |
| 216 | |
| 217 | GroupCall serviceForApp = new GroupCall(mSubscriptionId, |
| 218 | groupCallService, this, tmgi, serviceCallback); |
| 219 | mKnownActiveGroupCalls.add(serviceForApp); |
| 220 | |
| 221 | try { |
| 222 | int returnCode = groupCallService.startGroupCall( |
Hall Liu | c81cba4 | 2018-10-08 18:23:53 -0700 | [diff] [blame] | 223 | mSubscriptionId, tmgi, saiList, frequencyList, serviceCallback); |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 224 | if (returnCode == MbmsErrors.UNKNOWN) { |
| 225 | // Unbind and throw an obvious error |
| 226 | close(); |
| 227 | throw new IllegalStateException("Middleware must not return an unknown error code"); |
| 228 | } |
| 229 | if (returnCode != MbmsErrors.SUCCESS) { |
| 230 | mInternalCallback.onError(returnCode, null); |
| 231 | return null; |
| 232 | } |
| 233 | } catch (RemoteException e) { |
| 234 | Log.w(LOG_TAG, "Remote process died"); |
| 235 | mService.set(null); |
| 236 | sIsInitialized.set(false); |
| 237 | mInternalCallback.onError(MbmsErrors.ERROR_MIDDLEWARE_LOST, null); |
| 238 | return null; |
| 239 | } |
| 240 | |
| 241 | return serviceForApp; |
| 242 | } |
| 243 | |
| 244 | /** @hide */ |
| 245 | public void onGroupCallStopped(GroupCall service) { |
| 246 | mKnownActiveGroupCalls.remove(service); |
| 247 | } |
| 248 | |
| 249 | private int bindAndInitialize() { |
Hall Liu | 718986d | 2019-08-29 15:42:47 -0700 | [diff] [blame] | 250 | mServiceConnection = new ServiceConnection() { |
| 251 | @Override |
| 252 | public void onServiceConnected(ComponentName name, IBinder service) { |
| 253 | IMbmsGroupCallService groupCallService = |
| 254 | IMbmsGroupCallService.Stub.asInterface(service); |
| 255 | int result; |
| 256 | try { |
| 257 | result = groupCallService.initialize(mInternalCallback, |
| 258 | mSubscriptionId); |
| 259 | } catch (RemoteException e) { |
| 260 | Log.e(LOG_TAG, "Service died before initialization"); |
| 261 | mInternalCallback.onError( |
| 262 | MbmsErrors.InitializationErrors.ERROR_UNABLE_TO_INITIALIZE, |
| 263 | e.toString()); |
| 264 | sIsInitialized.set(false); |
| 265 | return; |
| 266 | } catch (RuntimeException e) { |
| 267 | Log.e(LOG_TAG, "Runtime exception during initialization"); |
| 268 | mInternalCallback.onError( |
| 269 | MbmsErrors.InitializationErrors.ERROR_UNABLE_TO_INITIALIZE, |
| 270 | e.toString()); |
| 271 | sIsInitialized.set(false); |
| 272 | return; |
| 273 | } |
| 274 | if (result == MbmsErrors.UNKNOWN) { |
| 275 | // Unbind and throw an obvious error |
| 276 | close(); |
| 277 | throw new IllegalStateException("Middleware must not return" |
| 278 | + " an unknown error code"); |
| 279 | } |
| 280 | if (result != MbmsErrors.SUCCESS) { |
| 281 | mInternalCallback.onError(result, |
| 282 | "Error returned during initialization"); |
| 283 | sIsInitialized.set(false); |
| 284 | return; |
| 285 | } |
| 286 | try { |
| 287 | groupCallService.asBinder().linkToDeath(mDeathRecipient, 0); |
| 288 | } catch (RemoteException e) { |
| 289 | mInternalCallback.onError(MbmsErrors.ERROR_MIDDLEWARE_LOST, |
| 290 | "Middleware lost during initialization"); |
| 291 | sIsInitialized.set(false); |
| 292 | return; |
| 293 | } |
| 294 | mService.set(groupCallService); |
| 295 | } |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 296 | |
Hall Liu | 718986d | 2019-08-29 15:42:47 -0700 | [diff] [blame] | 297 | @Override |
| 298 | public void onServiceDisconnected(ComponentName name) { |
| 299 | sIsInitialized.set(false); |
| 300 | mService.set(null); |
| 301 | } |
| 302 | |
| 303 | @Override |
| 304 | public void onNullBinding(ComponentName name) { |
| 305 | Log.w(LOG_TAG, "bindAndInitialize: Remote service returned null"); |
| 306 | mInternalCallback.onError(MbmsErrors.ERROR_MIDDLEWARE_LOST, |
| 307 | "Middleware service binding returned null"); |
| 308 | sIsInitialized.set(false); |
| 309 | mService.set(null); |
| 310 | mContext.unbindService(this); |
| 311 | } |
| 312 | }; |
| 313 | return MbmsUtils.startBinding(mContext, MBMS_GROUP_CALL_SERVICE_ACTION, mServiceConnection); |
Hall Liu | a7b0c1f | 2018-04-19 17:57:58 -0700 | [diff] [blame] | 314 | } |
| 315 | } |