MediaSessionRecord.java revision 4646d288821d62fdfe481be67d8b7fed7d7eabd8
1/* 2 * Copyright (C) 2014 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 17package com.android.server.media; 18 19import android.app.ActivityManager; 20import android.content.Intent; 21import android.content.pm.PackageManager; 22import android.media.routeprovider.RouteRequest; 23import android.media.session.ISessionController; 24import android.media.session.ISessionControllerCallback; 25import android.media.session.ISession; 26import android.media.session.ISessionCallback; 27import android.media.session.SessionController; 28import android.media.session.MediaMetadata; 29import android.media.session.RouteCommand; 30import android.media.session.RouteInfo; 31import android.media.session.RouteOptions; 32import android.media.session.RouteEvent; 33import android.media.session.Session; 34import android.media.session.SessionInfo; 35import android.media.session.RouteInterface; 36import android.media.session.PlaybackState; 37import android.media.Rating; 38import android.os.Bundle; 39import android.os.Handler; 40import android.os.IBinder; 41import android.os.Looper; 42import android.os.Message; 43import android.os.RemoteException; 44import android.os.ResultReceiver; 45import android.os.SystemClock; 46import android.os.UserHandle; 47import android.text.TextUtils; 48import android.util.Log; 49import android.util.Pair; 50import android.util.Slog; 51import android.view.KeyEvent; 52 53import java.io.PrintWriter; 54import java.util.ArrayList; 55import java.util.List; 56import java.util.UUID; 57 58/** 59 * This is the system implementation of a Session. Apps will interact with the 60 * MediaSession wrapper class instead. 61 */ 62public class MediaSessionRecord implements IBinder.DeathRecipient { 63 private static final String TAG = "MediaSessionRecord"; 64 65 /** 66 * These are the playback states that count as currently active. 67 */ 68 private static final int[] ACTIVE_STATES = { 69 PlaybackState.PLAYSTATE_FAST_FORWARDING, 70 PlaybackState.PLAYSTATE_REWINDING, 71 PlaybackState.PLAYSTATE_SKIPPING_BACKWARDS, 72 PlaybackState.PLAYSTATE_SKIPPING_FORWARDS, 73 PlaybackState.PLAYSTATE_BUFFERING, 74 PlaybackState.PLAYSTATE_CONNECTING, 75 PlaybackState.PLAYSTATE_PLAYING }; 76 77 /** 78 * The length of time a session will still be considered active after 79 * pausing in ms. 80 */ 81 private static final int ACTIVE_BUFFER = 30000; 82 83 private final MessageHandler mHandler; 84 85 private final int mOwnerPid; 86 private final int mOwnerUid; 87 private final int mUserId; 88 private final SessionInfo mSessionInfo; 89 private final String mTag; 90 private final ControllerStub mController; 91 private final SessionStub mSession; 92 private final SessionCb mSessionCb; 93 private final MediaSessionService mService; 94 95 private final Object mLock = new Object(); 96 private final ArrayList<ISessionControllerCallback> mControllerCallbacks = 97 new ArrayList<ISessionControllerCallback>(); 98 private final ArrayList<RouteRequest> mRequests = new ArrayList<RouteRequest>(); 99 100 private RouteInfo mRoute; 101 private RouteOptions mRequest; 102 private RouteConnectionRecord mConnection; 103 // TODO define a RouteState class with relevant info 104 private int mRouteState; 105 private long mFlags; 106 107 // TransportPerformer fields 108 109 private MediaMetadata mMetadata; 110 private PlaybackState mPlaybackState; 111 private int mRatingType; 112 private long mLastActiveTime; 113 // End TransportPerformer fields 114 115 private boolean mIsActive = false; 116 private boolean mDestroyed = false; 117 118 public MediaSessionRecord(int ownerPid, int ownerUid, int userId, String ownerPackageName, 119 ISessionCallback cb, String tag, MediaSessionService service, Handler handler) { 120 mOwnerPid = ownerPid; 121 mOwnerUid = ownerUid; 122 mUserId = userId; 123 mSessionInfo = new SessionInfo(UUID.randomUUID().toString(), ownerPackageName); 124 mTag = tag; 125 mController = new ControllerStub(); 126 mSession = new SessionStub(); 127 mSessionCb = new SessionCb(cb); 128 mService = service; 129 mHandler = new MessageHandler(handler.getLooper()); 130 } 131 132 /** 133 * Get the binder for the {@link Session}. 134 * 135 * @return The session binder apps talk to. 136 */ 137 public ISession getSessionBinder() { 138 return mSession; 139 } 140 141 /** 142 * Get the binder for the {@link SessionController}. 143 * 144 * @return The controller binder apps talk to. 145 */ 146 public ISessionController getControllerBinder() { 147 return mController; 148 } 149 150 /** 151 * Get the set of route requests this session is interested in. 152 * 153 * @return The list of RouteRequests 154 */ 155 public List<RouteRequest> getRouteRequests() { 156 return mRequests; 157 } 158 159 /** 160 * Get the route this session is currently on. 161 * 162 * @return The route the session is on. 163 */ 164 public RouteInfo getRoute() { 165 return mRoute; 166 } 167 168 /** 169 * Get the info for this session. 170 * 171 * @return Info that identifies this session. 172 */ 173 public SessionInfo getSessionInfo() { 174 return mSessionInfo; 175 } 176 177 /** 178 * Get this session's flags. 179 * 180 * @return The flags for this session. 181 */ 182 public long getFlags() { 183 return mFlags; 184 } 185 186 /** 187 * Check if this session has the specified flag. 188 * 189 * @param flag The flag to check. 190 * @return True if this session has that flag set, false otherwise. 191 */ 192 public boolean hasFlag(int flag) { 193 return (mFlags & flag) != 0; 194 } 195 196 /** 197 * Get the user id this session was created for. 198 * 199 * @return The user id for this session. 200 */ 201 public int getUserId() { 202 return mUserId; 203 } 204 205 /** 206 * Check if this session has system priorty and should receive media buttons 207 * before any other sessions. 208 * 209 * @return True if this is a system priority session, false otherwise 210 */ 211 public boolean isSystemPriority() { 212 return (mFlags & Session.FLAG_EXCLUSIVE_GLOBAL_PRIORITY) != 0; 213 } 214 215 /** 216 * Set the selected route. This does not connect to the route, just notifies 217 * the app that a new route has been selected. 218 * 219 * @param route The route that was selected. 220 */ 221 public void selectRoute(RouteInfo route) { 222 synchronized (mLock) { 223 if (route != mRoute) { 224 disconnect(Session.DISCONNECT_REASON_ROUTE_CHANGED); 225 } 226 mRoute = route; 227 } 228 mSessionCb.sendRouteChange(route); 229 } 230 231 /** 232 * Update the state of the route this session is using and notify the 233 * session. 234 * 235 * @param state The new state of the route. 236 */ 237 public void setRouteState(int state) { 238 mSessionCb.sendRouteStateChange(state); 239 } 240 241 /** 242 * Send an event to this session from the route it is using. 243 * 244 * @param event The event to send. 245 */ 246 public void sendRouteEvent(RouteEvent event) { 247 mSessionCb.sendRouteEvent(event); 248 } 249 250 /** 251 * Set the connection to use for the selected route and notify the app it is 252 * now connected. 253 * 254 * @param route The route the connection is to. 255 * @param request The request that was used to connect. 256 * @param connection The connection to the route. 257 * @return True if this connection is still valid, false if it is stale. 258 */ 259 public boolean setRouteConnected(RouteInfo route, RouteOptions request, 260 RouteConnectionRecord connection) { 261 synchronized (mLock) { 262 if (mDestroyed) { 263 Log.i(TAG, "setRouteConnected: session has been destroyed"); 264 connection.disconnect(); 265 return false; 266 } 267 if (mRoute == null || !TextUtils.equals(route.getId(), mRoute.getId())) { 268 Log.w(TAG, "setRouteConnected: connected route is stale"); 269 connection.disconnect(); 270 return false; 271 } 272 if (request != mRequest) { 273 Log.w(TAG, "setRouteConnected: connection request is stale"); 274 connection.disconnect(); 275 return false; 276 } 277 mConnection = connection; 278 mConnection.setListener(mConnectionListener); 279 mSessionCb.sendRouteConnected(); 280 } 281 return true; 282 } 283 284 /** 285 * Check if this session has been set to active by the app. 286 * 287 * @return True if the session is active, false otherwise. 288 */ 289 public boolean isActive() { 290 return mIsActive && !mDestroyed; 291 } 292 293 /** 294 * Check if the session is currently performing playback. This will also 295 * return true if the session was recently paused. 296 * 297 * @return True if the session is performing playback, false otherwise. 298 */ 299 public boolean isPlaybackActive() { 300 int state = mPlaybackState == null ? 0 : mPlaybackState.getState(); 301 if (isActiveState(state)) { 302 return true; 303 } 304 if (state == mPlaybackState.PLAYSTATE_PAUSED) { 305 long inactiveTime = SystemClock.uptimeMillis() - mLastActiveTime; 306 if (inactiveTime < ACTIVE_BUFFER) { 307 return true; 308 } 309 } 310 return false; 311 } 312 313 /** 314 * @return True if this session is currently connected to a route. 315 */ 316 public boolean isConnected() { 317 return mConnection != null; 318 } 319 320 public void disconnect(int reason) { 321 synchronized (mLock) { 322 if (!mDestroyed) { 323 disconnectLocked(reason); 324 } 325 } 326 } 327 328 private void disconnectLocked(int reason) { 329 if (mConnection != null) { 330 mConnection.setListener(null); 331 mConnection.disconnect(); 332 mConnection = null; 333 pushDisconnected(reason); 334 } 335 } 336 337 public boolean isTransportControlEnabled() { 338 return hasFlag(Session.FLAG_HANDLES_TRANSPORT_CONTROLS); 339 } 340 341 @Override 342 public void binderDied() { 343 mService.sessionDied(this); 344 } 345 346 /** 347 * Finish cleaning up this session, including disconnecting if connected and 348 * removing the death observer from the callback binder. 349 */ 350 public void onDestroy() { 351 synchronized (mLock) { 352 if (mDestroyed) { 353 return; 354 } 355 if (isConnected()) { 356 disconnectLocked(Session.DISCONNECT_REASON_SESSION_DESTROYED); 357 } 358 mRoute = null; 359 mRequest = null; 360 mDestroyed = true; 361 } 362 } 363 364 public ISessionCallback getCallback() { 365 return mSessionCb.mCb; 366 } 367 368 public void dump(PrintWriter pw, String prefix) { 369 pw.println(prefix + mTag + " " + this); 370 371 final String indent = prefix + " "; 372 pw.println(indent + "ownerPid=" + mOwnerPid + ", ownerUid=" + mOwnerUid 373 + ", userId=" + mUserId); 374 pw.println(indent + "info=" + mSessionInfo.toString()); 375 pw.println(indent + "active=" + mIsActive); 376 pw.println(indent + "flags=" + mFlags); 377 pw.println(indent + "rating type=" + mRatingType); 378 pw.println(indent + "controllers: " + mControllerCallbacks.size()); 379 pw.println(indent + "state=" + (mPlaybackState == null ? null : mPlaybackState.toString())); 380 pw.println(indent + "metadata:" + getShortMetadataString()); 381 pw.println(indent + "route requests {"); 382 int size = mRequests.size(); 383 for (int i = 0; i < size; i++) { 384 pw.println(indent + " " + mRequests.get(i).toString()); 385 } 386 pw.println(indent + "}"); 387 pw.println(indent + "route=" + (mRoute == null ? null : mRoute.toString())); 388 pw.println(indent + "connection=" + (mConnection == null ? null : mConnection.toString())); 389 pw.println(indent + "params=" + (mRequest == null ? null : mRequest.toString())); 390 } 391 392 private boolean isActiveState(int state) { 393 for (int i = 0; i < ACTIVE_STATES.length; i++) { 394 if (ACTIVE_STATES[i] == state) { 395 return true; 396 } 397 } 398 return false; 399 } 400 401 private String getShortMetadataString() { 402 int fields = mMetadata == null ? 0 : mMetadata.size(); 403 String title = mMetadata == null ? null : mMetadata 404 .getString(MediaMetadata.METADATA_KEY_TITLE); 405 return "size=" + fields + ", title=" + title; 406 } 407 408 private void pushDisconnected(int reason) { 409 synchronized (mLock) { 410 mSessionCb.sendRouteDisconnected(reason); 411 } 412 } 413 414 private void pushPlaybackStateUpdate() { 415 synchronized (mLock) { 416 if (mDestroyed) { 417 return; 418 } 419 for (int i = mControllerCallbacks.size() - 1; i >= 0; i--) { 420 ISessionControllerCallback cb = mControllerCallbacks.get(i); 421 try { 422 cb.onPlaybackStateChanged(mPlaybackState); 423 } catch (RemoteException e) { 424 Log.w(TAG, "Removing dead callback in pushPlaybackStateUpdate.", e); 425 mControllerCallbacks.remove(i); 426 } 427 } 428 } 429 } 430 431 private void pushMetadataUpdate() { 432 synchronized (mLock) { 433 if (mDestroyed) { 434 return; 435 } 436 for (int i = mControllerCallbacks.size() - 1; i >= 0; i--) { 437 ISessionControllerCallback cb = mControllerCallbacks.get(i); 438 try { 439 cb.onMetadataChanged(mMetadata); 440 } catch (RemoteException e) { 441 Log.w(TAG, "Removing dead callback in pushMetadataUpdate.", e); 442 mControllerCallbacks.remove(i); 443 } 444 } 445 } 446 } 447 448 private void pushRouteUpdate() { 449 synchronized (mLock) { 450 if (mDestroyed) { 451 return; 452 } 453 for (int i = mControllerCallbacks.size() - 1; i >= 0; i--) { 454 ISessionControllerCallback cb = mControllerCallbacks.get(i); 455 try { 456 cb.onRouteChanged(mRoute); 457 } catch (RemoteException e) { 458 Log.w(TAG, "Removing dead callback in pushRouteUpdate.", e); 459 mControllerCallbacks.remove(i); 460 } 461 } 462 } 463 } 464 465 private void pushEvent(String event, Bundle data) { 466 synchronized (mLock) { 467 if (mDestroyed) { 468 return; 469 } 470 for (int i = mControllerCallbacks.size() - 1; i >= 0; i--) { 471 ISessionControllerCallback cb = mControllerCallbacks.get(i); 472 try { 473 cb.onEvent(event, data); 474 } catch (RemoteException e) { 475 Log.w(TAG, "Error with callback in pushEvent.", e); 476 } 477 } 478 } 479 } 480 481 private void pushRouteCommand(RouteCommand command, ResultReceiver cb) { 482 synchronized (mLock) { 483 if (mDestroyed) { 484 return; 485 } 486 if (mRoute == null || !TextUtils.equals(command.getRouteInfo(), mRoute.getId())) { 487 if (cb != null) { 488 cb.send(RouteInterface.RESULT_ROUTE_IS_STALE, null); 489 return; 490 } 491 } 492 if (mConnection != null) { 493 mConnection.sendCommand(command, cb); 494 } else if (cb != null) { 495 cb.send(RouteInterface.RESULT_NOT_CONNECTED, null); 496 } 497 } 498 } 499 500 private PlaybackState getStateWithUpdatedPosition() { 501 PlaybackState state = mPlaybackState; 502 long duration = -1; 503 if (mMetadata != null && mMetadata.containsKey(MediaMetadata.METADATA_KEY_DURATION)) { 504 duration = mMetadata.getLong(MediaMetadata.METADATA_KEY_DURATION); 505 } 506 PlaybackState result = null; 507 if (state != null) { 508 if (state.getState() == PlaybackState.PLAYSTATE_PLAYING 509 || state.getState() == PlaybackState.PLAYSTATE_FAST_FORWARDING 510 || state.getState() == PlaybackState.PLAYSTATE_REWINDING) { 511 long updateTime = state.getLastPositionUpdateTime(); 512 if (updateTime > 0) { 513 long position = (long) (state.getRate() 514 * (SystemClock.elapsedRealtime() - updateTime)) + state.getPosition(); 515 if (duration >= 0 && position > duration) { 516 position = duration; 517 } else if (position < 0) { 518 position = 0; 519 } 520 result = new PlaybackState(state); 521 result.setState(state.getState(), position, state.getRate()); 522 } 523 } 524 } 525 return result == null ? state : result; 526 } 527 528 private final RouteConnectionRecord.Listener mConnectionListener 529 = new RouteConnectionRecord.Listener() { 530 @Override 531 public void onEvent(RouteEvent event) { 532 RouteEvent eventForSession = new RouteEvent(null, event.getIface(), 533 event.getEvent(), event.getExtras()); 534 mSessionCb.sendRouteEvent(eventForSession); 535 } 536 537 @Override 538 public void disconnect() { 539 MediaSessionRecord.this.disconnect(Session.DISCONNECT_REASON_PROVIDER_DISCONNECTED); 540 } 541 }; 542 543 private final class SessionStub extends ISession.Stub { 544 @Override 545 public void destroy() { 546 mService.destroySession(MediaSessionRecord.this); 547 } 548 549 @Override 550 public void sendEvent(String event, Bundle data) { 551 mHandler.post(MessageHandler.MSG_SEND_EVENT, event, data); 552 } 553 554 @Override 555 public ISessionController getController() { 556 return mController; 557 } 558 559 @Override 560 public void setActive(boolean active) { 561 mIsActive = active; 562 mService.updateSession(MediaSessionRecord.this); 563 mHandler.post(MessageHandler.MSG_UPDATE_SESSION_STATE); 564 } 565 566 @Override 567 public void setFlags(int flags) { 568 if ((flags & Session.FLAG_EXCLUSIVE_GLOBAL_PRIORITY) != 0) { 569 int pid = getCallingPid(); 570 int uid = getCallingUid(); 571 mService.enforcePhoneStatePermission(pid, uid); 572 } 573 mFlags = flags; 574 mHandler.post(MessageHandler.MSG_UPDATE_SESSION_STATE); 575 } 576 577 @Override 578 public void setMetadata(MediaMetadata metadata) { 579 mMetadata = metadata; 580 mHandler.post(MessageHandler.MSG_UPDATE_METADATA); 581 } 582 583 @Override 584 public void setPlaybackState(PlaybackState state) { 585 int oldState = mPlaybackState == null ? 0 : mPlaybackState.getState(); 586 int newState = state == null ? 0 : state.getState(); 587 if (isActiveState(oldState) && newState == PlaybackState.PLAYSTATE_PAUSED) { 588 mLastActiveTime = SystemClock.elapsedRealtime(); 589 } 590 mPlaybackState = state; 591 mService.onSessionPlaystateChange(MediaSessionRecord.this, oldState, newState); 592 mHandler.post(MessageHandler.MSG_UPDATE_PLAYBACK_STATE); 593 } 594 595 @Override 596 public void setRatingType(int type) { 597 mRatingType = type; 598 } 599 600 @Override 601 public void sendRouteCommand(RouteCommand command, ResultReceiver cb) { 602 mHandler.post(MessageHandler.MSG_SEND_COMMAND, 603 new Pair<RouteCommand, ResultReceiver>(command, cb)); 604 } 605 606 @Override 607 public boolean setRoute(RouteInfo route) throws RemoteException { 608 // TODO decide if allowed to set route and if the route exists 609 return false; 610 } 611 612 @Override 613 public void connectToRoute(RouteInfo route, RouteOptions request) 614 throws RemoteException { 615 if (mRoute == null || !TextUtils.equals(route.getId(), mRoute.getId())) { 616 throw new RemoteException("RouteInfo does not match current route"); 617 } 618 mService.connectToRoute(MediaSessionRecord.this, route, request); 619 mRequest = request; 620 } 621 622 @Override 623 public void disconnectFromRoute(RouteInfo route) { 624 if (route != null && mRoute != null 625 && TextUtils.equals(route.getId(), mRoute.getId())) { 626 disconnect(Session.DISCONNECT_REASON_SESSION_DISCONNECTED); 627 } 628 } 629 630 @Override 631 public void setRouteOptions(List<RouteOptions> options) throws RemoteException { 632 mRequests.clear(); 633 for (int i = options.size() - 1; i >= 0; i--) { 634 RouteRequest request = new RouteRequest(mSessionInfo, options.get(i), 635 false); 636 mRequests.add(request); 637 } 638 } 639 } 640 641 class SessionCb { 642 private final ISessionCallback mCb; 643 644 public SessionCb(ISessionCallback cb) { 645 mCb = cb; 646 } 647 648 public void sendMediaButton(KeyEvent keyEvent) { 649 Intent mediaButtonIntent = new Intent(Intent.ACTION_MEDIA_BUTTON); 650 mediaButtonIntent.putExtra(Intent.EXTRA_KEY_EVENT, keyEvent); 651 try { 652 mCb.onMediaButton(mediaButtonIntent); 653 } catch (RemoteException e) { 654 Slog.e(TAG, "Remote failure in sendMediaRequest.", e); 655 } 656 } 657 658 public void sendCommand(String command, Bundle extras, ResultReceiver cb) { 659 try { 660 mCb.onCommand(command, extras, cb); 661 } catch (RemoteException e) { 662 Slog.e(TAG, "Remote failure in sendCommand.", e); 663 } 664 } 665 666 public void sendRouteChange(RouteInfo route) { 667 try { 668 mCb.onRequestRouteChange(route); 669 } catch (RemoteException e) { 670 Slog.e(TAG, "Remote failure in sendRouteChange.", e); 671 } 672 } 673 674 public void sendRouteStateChange(int state) { 675 try { 676 mCb.onRouteStateChange(state); 677 } catch (RemoteException e) { 678 Slog.e(TAG, "Remote failure in sendRouteStateChange.", e); 679 } 680 } 681 682 public void sendRouteEvent(RouteEvent event) { 683 try { 684 mCb.onRouteEvent(event); 685 } catch (RemoteException e) { 686 Slog.e(TAG, "Remote failure in sendRouteEvent.", e); 687 } 688 } 689 690 public void sendRouteConnected() { 691 try { 692 mCb.onRouteConnected(mRoute, mRequest); 693 } catch (RemoteException e) { 694 Slog.e(TAG, "Remote failure in sendRouteStateChange.", e); 695 } 696 } 697 698 public void sendRouteDisconnected(int reason) { 699 try { 700 mCb.onRouteDisconnected(mRoute, reason); 701 } catch (RemoteException e) { 702 Slog.e(TAG, "Remote failure in sendRouteDisconnected"); 703 } 704 } 705 706 public void play() { 707 try { 708 mCb.onPlay(); 709 } catch (RemoteException e) { 710 Slog.e(TAG, "Remote failure in play.", e); 711 } 712 } 713 714 public void pause() { 715 try { 716 mCb.onPause(); 717 } catch (RemoteException e) { 718 Slog.e(TAG, "Remote failure in pause.", e); 719 } 720 } 721 722 public void stop() { 723 try { 724 mCb.onStop(); 725 } catch (RemoteException e) { 726 Slog.e(TAG, "Remote failure in stop.", e); 727 } 728 } 729 730 public void next() { 731 try { 732 mCb.onNext(); 733 } catch (RemoteException e) { 734 Slog.e(TAG, "Remote failure in next.", e); 735 } 736 } 737 738 public void previous() { 739 try { 740 mCb.onPrevious(); 741 } catch (RemoteException e) { 742 Slog.e(TAG, "Remote failure in previous.", e); 743 } 744 } 745 746 public void fastForward() { 747 try { 748 mCb.onFastForward(); 749 } catch (RemoteException e) { 750 Slog.e(TAG, "Remote failure in fastForward.", e); 751 } 752 } 753 754 public void rewind() { 755 try { 756 mCb.onRewind(); 757 } catch (RemoteException e) { 758 Slog.e(TAG, "Remote failure in rewind.", e); 759 } 760 } 761 762 public void seekTo(long pos) { 763 try { 764 mCb.onSeekTo(pos); 765 } catch (RemoteException e) { 766 Slog.e(TAG, "Remote failure in seekTo.", e); 767 } 768 } 769 770 public void rate(Rating rating) { 771 try { 772 mCb.onRate(rating); 773 } catch (RemoteException e) { 774 Slog.e(TAG, "Remote failure in rate.", e); 775 } 776 } 777 } 778 779 class ControllerStub extends ISessionController.Stub { 780 @Override 781 public void sendCommand(String command, Bundle extras, ResultReceiver cb) 782 throws RemoteException { 783 mSessionCb.sendCommand(command, extras, cb); 784 } 785 786 @Override 787 public void sendMediaButton(KeyEvent mediaButtonIntent) { 788 mSessionCb.sendMediaButton(mediaButtonIntent); 789 } 790 791 @Override 792 public void registerCallbackListener(ISessionControllerCallback cb) { 793 synchronized (mLock) { 794 if (!mControllerCallbacks.contains(cb)) { 795 mControllerCallbacks.add(cb); 796 } 797 } 798 } 799 800 @Override 801 public void unregisterCallbackListener(ISessionControllerCallback cb) 802 throws RemoteException { 803 synchronized (mLock) { 804 mControllerCallbacks.remove(cb); 805 } 806 } 807 808 @Override 809 public void play() throws RemoteException { 810 mSessionCb.play(); 811 } 812 813 @Override 814 public void pause() throws RemoteException { 815 mSessionCb.pause(); 816 } 817 818 @Override 819 public void stop() throws RemoteException { 820 mSessionCb.stop(); 821 } 822 823 @Override 824 public void next() throws RemoteException { 825 mSessionCb.next(); 826 } 827 828 @Override 829 public void previous() throws RemoteException { 830 mSessionCb.previous(); 831 } 832 833 @Override 834 public void fastForward() throws RemoteException { 835 mSessionCb.fastForward(); 836 } 837 838 @Override 839 public void rewind() throws RemoteException { 840 mSessionCb.rewind(); 841 } 842 843 @Override 844 public void seekTo(long pos) throws RemoteException { 845 mSessionCb.seekTo(pos); 846 } 847 848 @Override 849 public void rate(Rating rating) throws RemoteException { 850 mSessionCb.rate(rating); 851 } 852 853 854 @Override 855 public MediaMetadata getMetadata() { 856 return mMetadata; 857 } 858 859 @Override 860 public PlaybackState getPlaybackState() { 861 return getStateWithUpdatedPosition(); 862 } 863 864 @Override 865 public int getRatingType() { 866 return mRatingType; 867 } 868 869 @Override 870 public boolean isTransportControlEnabled() { 871 return MediaSessionRecord.this.isTransportControlEnabled(); 872 } 873 874 @Override 875 public void showRoutePicker() { 876 mService.showRoutePickerForSession(MediaSessionRecord.this); 877 } 878 } 879 880 private class MessageHandler extends Handler { 881 private static final int MSG_UPDATE_METADATA = 1; 882 private static final int MSG_UPDATE_PLAYBACK_STATE = 2; 883 private static final int MSG_UPDATE_ROUTE = 3; 884 private static final int MSG_SEND_EVENT = 4; 885 private static final int MSG_UPDATE_ROUTE_FILTERS = 5; 886 private static final int MSG_SEND_COMMAND = 6; 887 private static final int MSG_UPDATE_SESSION_STATE = 7; 888 889 public MessageHandler(Looper looper) { 890 super(looper); 891 } 892 @Override 893 public void handleMessage(Message msg) { 894 switch (msg.what) { 895 case MSG_UPDATE_METADATA: 896 pushMetadataUpdate(); 897 break; 898 case MSG_UPDATE_PLAYBACK_STATE: 899 pushPlaybackStateUpdate(); 900 break; 901 case MSG_UPDATE_ROUTE: 902 pushRouteUpdate(); 903 break; 904 case MSG_SEND_EVENT: 905 pushEvent((String) msg.obj, msg.getData()); 906 break; 907 case MSG_SEND_COMMAND: 908 Pair<RouteCommand, ResultReceiver> cmd = 909 (Pair<RouteCommand, ResultReceiver>) msg.obj; 910 pushRouteCommand(cmd.first, cmd.second); 911 break; 912 case MSG_UPDATE_SESSION_STATE: 913 // TODO add session state 914 break; 915 } 916 } 917 918 public void post(int what) { 919 post(what, null); 920 } 921 922 public void post(int what, Object obj) { 923 obtainMessage(what, obj).sendToTarget(); 924 } 925 926 public void post(int what, Object obj, Bundle data) { 927 Message msg = obtainMessage(what, obj); 928 msg.setData(data); 929 msg.sendToTarget(); 930 } 931 } 932 933} 934