1package eu.siacs.conversations.ui;
2
3import android.Manifest;
4import android.annotation.SuppressLint;
5import android.content.Context;
6import android.content.Intent;
7import android.databinding.DataBindingUtil;
8import android.os.Build;
9import android.os.Bundle;
10import android.os.PowerManager;
11import android.support.annotation.NonNull;
12import android.support.annotation.StringRes;
13import android.util.Log;
14import android.view.View;
15import android.view.WindowManager;
16import android.widget.Toast;
17
18import com.google.common.collect.ImmutableList;
19
20import java.lang.ref.WeakReference;
21import java.util.Arrays;
22import java.util.Set;
23
24import eu.siacs.conversations.Config;
25import eu.siacs.conversations.R;
26import eu.siacs.conversations.databinding.ActivityRtpSessionBinding;
27import eu.siacs.conversations.entities.Account;
28import eu.siacs.conversations.entities.Contact;
29import eu.siacs.conversations.services.AppRTCAudioManager;
30import eu.siacs.conversations.services.XmppConnectionService;
31import eu.siacs.conversations.utils.PermissionUtils;
32import eu.siacs.conversations.xmpp.jingle.AbstractJingleConnection;
33import eu.siacs.conversations.xmpp.jingle.JingleRtpConnection;
34import eu.siacs.conversations.xmpp.jingle.RtpEndUserState;
35import rocks.xmpp.addr.Jid;
36
37import static eu.siacs.conversations.utils.PermissionUtils.getFirstDenied;
38import static java.util.Arrays.asList;
39
40//TODO if last state was BUSY (or RETRY); we want to reset action to view or something so we don’t automatically call again on recreate
41
42public class RtpSessionActivity extends XmppActivity implements XmppConnectionService.OnJingleRtpConnectionUpdate {
43
44 private static final String PROXIMITY_WAKE_LOCK_TAG = "conversations:in-rtp-session";
45
46 private static final int REQUEST_ACCEPT_CALL = 0x1111;
47
48 public static final String EXTRA_WITH = "with";
49 public static final String EXTRA_SESSION_ID = "session_id";
50 public static final String EXTRA_LAST_REPORTED_STATE = "last_reported_state";
51
52 public static final String ACTION_ACCEPT_CALL = "action_accept_call";
53 public static final String ACTION_MAKE_VOICE_CALL = "action_make_voice_call";
54 public static final String ACTION_MAKE_VIDEO_CALL = "action_make_video_call";
55
56 private WeakReference<JingleRtpConnection> rtpConnectionReference;
57
58 private ActivityRtpSessionBinding binding;
59 private PowerManager.WakeLock mProximityWakeLock;
60
61 @Override
62 public void onCreate(Bundle savedInstanceState) {
63 super.onCreate(savedInstanceState);
64 getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
65 | WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD
66 | WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
67 | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
68 Log.d(Config.LOGTAG, "RtpSessionActivity.onCreate()");
69 this.binding = DataBindingUtil.setContentView(this, R.layout.activity_rtp_session);
70 }
71
72 @Override
73 public void onStart() {
74 super.onStart();
75 Log.d(Config.LOGTAG, "RtpSessionActivity.onStart()");
76 }
77
78 private void endCall(View view) {
79 endCall();
80 }
81
82 private void endCall() {
83 if (this.rtpConnectionReference == null) {
84 final Intent intent = getIntent();
85 final Account account = extractAccount(intent);
86 final Jid with = Jid.of(intent.getStringExtra(EXTRA_WITH));
87 xmppConnectionService.getJingleConnectionManager().retractSessionProposal(account, with.asBareJid());
88 finish();
89 } else {
90 requireRtpConnection().endCall();
91 }
92 }
93
94 private void rejectCall(View view) {
95 requireRtpConnection().rejectCall();
96 finish();
97 }
98
99 private void acceptCall(View view) {
100 requestPermissionsAndAcceptCall();
101 }
102
103 private void requestPermissionsAndAcceptCall() {
104 if (PermissionUtils.hasPermission(this, ImmutableList.of(Manifest.permission.RECORD_AUDIO), REQUEST_ACCEPT_CALL)) {
105 //TODO like wise the propose; we might just wait here for the audio manager to come up
106 putScreenInCallMode();
107 requireRtpConnection().acceptCall();
108 }
109 }
110
111 @SuppressLint("WakelockTimeout")
112 private void putScreenInCallMode() {
113 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
114 final JingleRtpConnection rtpConnection = rtpConnectionReference != null ? rtpConnectionReference.get() : null;
115 final AppRTCAudioManager audioManager = rtpConnection == null ? null : rtpConnection.getAudioManager();
116 if (audioManager == null || audioManager.getSelectedAudioDevice() == AppRTCAudioManager.AudioDevice.EARPIECE) {
117 acquireProximityWakeLock();
118 }
119 }
120
121 private void acquireProximityWakeLock() {
122 final PowerManager powerManager = (PowerManager) getSystemService(Context.POWER_SERVICE);
123 if (powerManager == null) {
124 Log.e(Config.LOGTAG, "power manager not available");
125 return;
126 }
127 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
128 if (this.mProximityWakeLock == null) {
129 this.mProximityWakeLock = powerManager.newWakeLock(PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK, PROXIMITY_WAKE_LOCK_TAG);
130 }
131 if (!this.mProximityWakeLock.isHeld()) {
132 Log.d(Config.LOGTAG, "acquiring proximity wake lock");
133 this.mProximityWakeLock.acquire();
134 }
135 }
136 }
137
138 private void releaseProximityWakeLock() {
139 if (this.mProximityWakeLock != null && mProximityWakeLock.isHeld()) {
140 Log.d(Config.LOGTAG, "releasing proximity wake lock");
141 this.mProximityWakeLock.release();
142 this.mProximityWakeLock = null;
143 }
144 }
145
146 private void putProximityWakeLockInProperState() {
147 if (requireRtpConnection().getAudioManager().getSelectedAudioDevice() == AppRTCAudioManager.AudioDevice.EARPIECE) {
148 acquireProximityWakeLock();
149 } else {
150 releaseProximityWakeLock();
151 }
152 }
153
154 @Override
155 protected void refreshUiReal() {
156
157 }
158
159 @Override
160 public void onNewIntent(final Intent intent) {
161 super.onNewIntent(intent);
162 setIntent(intent);
163 if (xmppConnectionService == null) {
164 Log.d(Config.LOGTAG, "RtpSessionActivity: background service wasn't bound in onNewIntent()");
165 return;
166 }
167 final Account account = extractAccount(intent);
168 final Jid with = Jid.of(intent.getStringExtra(EXTRA_WITH));
169 final String sessionId = intent.getStringExtra(EXTRA_SESSION_ID);
170 if (sessionId != null) {
171 Log.d(Config.LOGTAG, "reinitializing from onNewIntent()");
172 initializeActivityWithRunningRtpSession(account, with, sessionId);
173 if (ACTION_ACCEPT_CALL.equals(intent.getAction())) {
174 Log.d(Config.LOGTAG, "accepting call from onNewIntent()");
175 requestPermissionsAndAcceptCall();
176 resetIntent(intent.getExtras());
177 }
178 } else {
179 throw new IllegalStateException("received onNewIntent without sessionId");
180 }
181 }
182
183 @Override
184 void onBackendConnected() {
185 final Intent intent = getIntent();
186 final Account account = extractAccount(intent);
187 final Jid with = Jid.of(intent.getStringExtra(EXTRA_WITH));
188 final String sessionId = intent.getStringExtra(EXTRA_SESSION_ID);
189 if (sessionId != null) {
190 initializeActivityWithRunningRtpSession(account, with, sessionId);
191 if (ACTION_ACCEPT_CALL.equals(intent.getAction())) {
192 Log.d(Config.LOGTAG, "intent action was accept");
193 requestPermissionsAndAcceptCall();
194 resetIntent(intent.getExtras());
195 }
196 } else if (asList(ACTION_MAKE_VIDEO_CALL, ACTION_MAKE_VOICE_CALL).contains(intent.getAction())) {
197 proposeJingleRtpSession(account, with);
198 binding.with.setText(account.getRoster().getContact(with).getDisplayName());
199 } else if (Intent.ACTION_VIEW.equals(intent.getAction())) {
200 final String extraLastState = intent.getStringExtra(EXTRA_LAST_REPORTED_STATE);
201 if (extraLastState != null) {
202 Log.d(Config.LOGTAG, "restored last state from intent extra");
203 RtpEndUserState state = RtpEndUserState.valueOf(extraLastState);
204 updateButtonConfiguration(state);
205 updateStateDisplay(state);
206 }
207 binding.with.setText(account.getRoster().getContact(with).getDisplayName());
208 }
209 }
210
211 private void proposeJingleRtpSession(final Account account, final Jid with) {
212 xmppConnectionService.getJingleConnectionManager().proposeJingleRtpSession(account, with);
213 //TODO maybe we don’t want to acquire a wake lock just yet and wait for audio manager to discover what speaker we are using
214 putScreenInCallMode();
215 }
216
217 @Override
218 public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
219 super.onRequestPermissionsResult(requestCode, permissions, grantResults);
220 if (PermissionUtils.allGranted(grantResults)) {
221 if (requestCode == REQUEST_ACCEPT_CALL) {
222 requireRtpConnection().acceptCall();
223 }
224 } else {
225 @StringRes int res;
226 final String firstDenied = getFirstDenied(grantResults, permissions);
227 if (Manifest.permission.RECORD_AUDIO.equals(firstDenied)) {
228 res = R.string.no_microphone_permission;
229 } else if (Manifest.permission.CAMERA.equals(firstDenied)) {
230 res = R.string.no_camera_permission;
231 } else {
232 throw new IllegalStateException("Invalid permission result request");
233 }
234 Toast.makeText(this, res, Toast.LENGTH_SHORT).show();
235 }
236 }
237
238 @Override
239 public void onStop() {
240 releaseProximityWakeLock();
241 //TODO maybe we want to finish if call had ended
242 super.onStop();
243 }
244
245 @Override
246 public void onBackPressed() {
247 endCall();
248 super.onBackPressed();
249 }
250
251
252 private void initializeActivityWithRunningRtpSession(final Account account, Jid with, String sessionId) {
253 final WeakReference<JingleRtpConnection> reference = xmppConnectionService.getJingleConnectionManager()
254 .findJingleRtpConnection(account, with, sessionId);
255 if (reference == null || reference.get() == null) {
256 finish();
257 return;
258 }
259 this.rtpConnectionReference = reference;
260 final RtpEndUserState currentState = requireRtpConnection().getEndUserState();
261 if (currentState == RtpEndUserState.ENDED) {
262 finish();
263 return;
264 }
265 if (currentState == RtpEndUserState.INCOMING_CALL) {
266 getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
267 }
268 if (JingleRtpConnection.STATES_SHOWING_ONGOING_CALL.contains(requireRtpConnection().getState())) {
269 putScreenInCallMode();
270 }
271 binding.with.setText(getWith().getDisplayName());
272 updateStateDisplay(currentState);
273 updateButtonConfiguration(currentState);
274 }
275
276 private void reInitializeActivityWithRunningRapSession(final Account account, Jid with, String sessionId) {
277 runOnUiThread(() -> {
278 initializeActivityWithRunningRtpSession(account, with, sessionId);
279 });
280 final Intent intent = new Intent(Intent.ACTION_VIEW);
281 intent.putExtra(EXTRA_ACCOUNT, account.getJid().toEscapedString());
282 intent.putExtra(EXTRA_WITH, with.toEscapedString());
283 intent.putExtra(EXTRA_SESSION_ID, sessionId);
284 setIntent(intent);
285 }
286
287 private void updateStateDisplay(final RtpEndUserState state) {
288 switch (state) {
289 case INCOMING_CALL:
290 binding.status.setText(R.string.rtp_state_incoming_call);
291 break;
292 case CONNECTING:
293 binding.status.setText(R.string.rtp_state_connecting);
294 break;
295 case CONNECTED:
296 binding.status.setText(R.string.rtp_state_connected);
297 break;
298 case ACCEPTING_CALL:
299 binding.status.setText(R.string.rtp_state_accepting_call);
300 break;
301 case ENDING_CALL:
302 binding.status.setText(R.string.rtp_state_ending_call);
303 break;
304 case FINDING_DEVICE:
305 binding.status.setText(R.string.rtp_state_finding_device);
306 break;
307 case RINGING:
308 binding.status.setText(R.string.rtp_state_ringing);
309 break;
310 case DECLINED_OR_BUSY:
311 binding.status.setText(R.string.rtp_state_declined_or_busy);
312 break;
313 case CONNECTIVITY_ERROR:
314 binding.status.setText(R.string.rtp_state_connectivity_error);
315 break;
316 case APPLICATION_ERROR:
317 binding.status.setText(R.string.rtp_state_application_failure);
318 break;
319 case ENDED:
320 throw new IllegalStateException("Activity should have called finishAndReleaseWakeLock();");
321 default:
322 throw new IllegalStateException(String.format("State %s has not been handled in UI", state));
323 }
324 }
325
326 @SuppressLint("RestrictedApi")
327 private void updateButtonConfiguration(final RtpEndUserState state) {
328 if (state == RtpEndUserState.INCOMING_CALL) {
329 this.binding.rejectCall.setOnClickListener(this::rejectCall);
330 this.binding.rejectCall.setImageResource(R.drawable.ic_call_end_white_48dp);
331 this.binding.rejectCall.setVisibility(View.VISIBLE);
332 this.binding.endCall.setVisibility(View.INVISIBLE);
333 this.binding.acceptCall.setOnClickListener(this::acceptCall);
334 this.binding.acceptCall.setImageResource(R.drawable.ic_call_white_48dp);
335 this.binding.acceptCall.setVisibility(View.VISIBLE);
336 } else if (state == RtpEndUserState.ENDING_CALL) {
337 this.binding.rejectCall.setVisibility(View.INVISIBLE);
338 this.binding.endCall.setVisibility(View.INVISIBLE);
339 this.binding.acceptCall.setVisibility(View.INVISIBLE);
340 } else if (state == RtpEndUserState.DECLINED_OR_BUSY) {
341 this.binding.rejectCall.setVisibility(View.INVISIBLE);
342 this.binding.endCall.setOnClickListener(this::exit);
343 this.binding.endCall.setImageResource(R.drawable.ic_clear_white_48dp);
344 this.binding.endCall.setVisibility(View.VISIBLE);
345 this.binding.acceptCall.setVisibility(View.INVISIBLE);
346 } else if (state == RtpEndUserState.CONNECTIVITY_ERROR || state == RtpEndUserState.APPLICATION_ERROR) {
347 this.binding.rejectCall.setOnClickListener(this::exit);
348 this.binding.rejectCall.setImageResource(R.drawable.ic_clear_white_48dp);
349 this.binding.rejectCall.setVisibility(View.VISIBLE);
350 this.binding.endCall.setVisibility(View.INVISIBLE);
351 this.binding.acceptCall.setOnClickListener(this::retry);
352 this.binding.acceptCall.setImageResource(R.drawable.ic_replay_white_48dp);
353 this.binding.acceptCall.setVisibility(View.VISIBLE);
354 } else {
355 this.binding.rejectCall.setVisibility(View.INVISIBLE);
356 this.binding.endCall.setOnClickListener(this::endCall);
357 this.binding.endCall.setImageResource(R.drawable.ic_call_end_white_48dp);
358 this.binding.endCall.setVisibility(View.VISIBLE);
359 this.binding.acceptCall.setVisibility(View.INVISIBLE);
360 }
361 updateInCallButtonConfiguration(state);
362 }
363
364 private void updateInCallButtonConfiguration() {
365 updateInCallButtonConfiguration(requireRtpConnection().getEndUserState());
366 }
367
368 @SuppressLint("RestrictedApi")
369 private void updateInCallButtonConfiguration(final RtpEndUserState state) {
370 if (state == RtpEndUserState.CONNECTED) {
371 final AppRTCAudioManager audioManager = requireRtpConnection().getAudioManager();
372 updateInCallButtonConfiguration(
373 audioManager.getSelectedAudioDevice(),
374 audioManager.getAudioDevices().size(),
375 requireRtpConnection().isMicrophoneEnabled()
376 );
377 } else {
378 this.binding.inCallActionLeft.setVisibility(View.GONE);
379 this.binding.inCallActionRight.setVisibility(View.GONE);
380 }
381 }
382
383 @SuppressLint("RestrictedApi")
384 private void updateInCallButtonConfiguration(final AppRTCAudioManager.AudioDevice selectedAudioDevice, final int numberOfChoices, final boolean microphoneEnabled) {
385 switch (selectedAudioDevice) {
386 case EARPIECE:
387 this.binding.inCallActionLeft.setImageResource(R.drawable.ic_volume_off_black_24dp);
388 if (numberOfChoices >= 2) {
389 this.binding.inCallActionLeft.setOnClickListener(this::switchToSpeaker);
390 } else {
391 this.binding.inCallActionLeft.setOnClickListener(null);
392 this.binding.inCallActionLeft.setClickable(false);
393 }
394 break;
395 case WIRED_HEADSET:
396 this.binding.inCallActionLeft.setImageResource(R.drawable.ic_headset_black_24dp);
397 this.binding.inCallActionLeft.setOnClickListener(null);
398 this.binding.inCallActionLeft.setClickable(false);
399 break;
400 case SPEAKER_PHONE:
401 this.binding.inCallActionLeft.setImageResource(R.drawable.ic_volume_up_black_24dp);
402 if (numberOfChoices >= 2) {
403 this.binding.inCallActionLeft.setOnClickListener(this::switchToEarpiece);
404 } else {
405 this.binding.inCallActionLeft.setOnClickListener(null);
406 this.binding.inCallActionLeft.setClickable(false);
407 }
408 break;
409 case BLUETOOTH:
410 this.binding.inCallActionLeft.setImageResource(R.drawable.ic_bluetooth_audio_black_24dp);
411 this.binding.inCallActionLeft.setOnClickListener(null);
412 this.binding.inCallActionLeft.setClickable(false);
413 break;
414 }
415 this.binding.inCallActionLeft.setVisibility(View.VISIBLE);
416 if (microphoneEnabled) {
417 this.binding.inCallActionRight.setImageResource(R.drawable.ic_mic_black_24dp);
418 this.binding.inCallActionRight.setOnClickListener(this::disableMicrophone);
419 } else {
420 this.binding.inCallActionRight.setImageResource(R.drawable.ic_mic_off_black_24dp);
421 this.binding.inCallActionRight.setOnClickListener(this::enableMicrophone);
422 }
423 this.binding.inCallActionRight.setVisibility(View.VISIBLE);
424 }
425
426 private void disableMicrophone(View view) {
427 JingleRtpConnection rtpConnection = requireRtpConnection();
428 rtpConnection.setMicrophoneEnabled(false);
429 updateInCallButtonConfiguration();
430 }
431
432 private void enableMicrophone(View view) {
433 JingleRtpConnection rtpConnection = requireRtpConnection();
434 rtpConnection.setMicrophoneEnabled(true);
435 updateInCallButtonConfiguration();
436 }
437
438 private void switchToEarpiece(View view) {
439 requireRtpConnection().getAudioManager().setDefaultAudioDevice(AppRTCAudioManager.AudioDevice.EARPIECE);
440 acquireProximityWakeLock();
441 }
442
443 private void switchToSpeaker(View view) {
444 requireRtpConnection().getAudioManager().setDefaultAudioDevice(AppRTCAudioManager.AudioDevice.SPEAKER_PHONE);
445 releaseProximityWakeLock();
446 }
447
448 private void retry(View view) {
449 Log.d(Config.LOGTAG, "attempting retry");
450 final Intent intent = getIntent();
451 final Account account = extractAccount(intent);
452 final Jid with = Jid.of(intent.getStringExtra(EXTRA_WITH));
453 this.rtpConnectionReference = null;
454 proposeJingleRtpSession(account, with);
455 }
456
457 private void exit(View view) {
458 finish();
459 }
460
461 private Contact getWith() {
462 final AbstractJingleConnection.Id id = requireRtpConnection().getId();
463 final Account account = id.account;
464 return account.getRoster().getContact(id.with);
465 }
466
467 private JingleRtpConnection requireRtpConnection() {
468 final JingleRtpConnection connection = this.rtpConnectionReference != null ? this.rtpConnectionReference.get() : null;
469 if (connection == null) {
470 throw new IllegalStateException("No RTP connection found");
471 }
472 return connection;
473 }
474
475 @Override
476 public void onJingleRtpConnectionUpdate(Account account, Jid with, final String sessionId, RtpEndUserState state) {
477 if (Arrays.asList(RtpEndUserState.APPLICATION_ERROR, RtpEndUserState.DECLINED_OR_BUSY, RtpEndUserState.DECLINED_OR_BUSY).contains(state)) {
478 releaseProximityWakeLock();
479 }
480 Log.d(Config.LOGTAG, "onJingleRtpConnectionUpdate(" + state + ")");
481 if (with.isBareJid()) {
482 updateRtpSessionProposalState(account, with, state);
483 return;
484 }
485 if (this.rtpConnectionReference == null) {
486 //this happens when going from proposed session to actual session
487 reInitializeActivityWithRunningRapSession(account, with, sessionId);
488 return;
489 }
490 final AbstractJingleConnection.Id id = requireRtpConnection().getId();
491 if (account == id.account && id.with.equals(with) && id.sessionId.equals(sessionId)) {
492 if (state == RtpEndUserState.ENDED) {
493 finish();
494 return;
495 } else if (asList(RtpEndUserState.APPLICATION_ERROR, RtpEndUserState.DECLINED_OR_BUSY, RtpEndUserState.CONNECTIVITY_ERROR).contains(state)) {
496 resetIntent(account, with, state);
497 }
498 runOnUiThread(() -> {
499 updateStateDisplay(state);
500 updateButtonConfiguration(state);
501 });
502 } else {
503 Log.d(Config.LOGTAG, "received update for other rtp session");
504 //TODO if we only ever have one; we might just switch over? Maybe!
505 }
506 }
507
508 @Override
509 public void onAudioDeviceChanged(AppRTCAudioManager.AudioDevice selectedAudioDevice, Set<AppRTCAudioManager.AudioDevice> availableAudioDevices) {
510 Log.d(Config.LOGTAG, "onAudioDeviceChanged in activity: selected:" + selectedAudioDevice + ", available:" + availableAudioDevices);
511 try {
512 if (requireRtpConnection().getEndUserState() == RtpEndUserState.CONNECTED) {
513 final AppRTCAudioManager audioManager = requireRtpConnection().getAudioManager();
514 updateInCallButtonConfiguration(
515 audioManager.getSelectedAudioDevice(),
516 audioManager.getAudioDevices().size(),
517 requireRtpConnection().isMicrophoneEnabled()
518 );
519 }
520 putProximityWakeLockInProperState();
521 } catch (IllegalStateException e) {
522 Log.d(Config.LOGTAG, "RTP connection was not available when audio device changed");
523 }
524 }
525
526 private void updateRtpSessionProposalState(final Account account, final Jid with, final RtpEndUserState state) {
527 final Intent currentIntent = getIntent();
528 final String withExtra = currentIntent == null ? null : currentIntent.getStringExtra(EXTRA_WITH);
529 if (withExtra == null) {
530 return;
531 }
532 if (Jid.ofEscaped(withExtra).asBareJid().equals(with)) {
533 runOnUiThread(() -> {
534 updateStateDisplay(state);
535 updateButtonConfiguration(state);
536 });
537 resetIntent(account, with, state);
538 }
539 }
540
541 private void resetIntent(final Bundle extras) {
542 final Intent intent = new Intent(Intent.ACTION_VIEW);
543 intent.putExtras(extras);
544 setIntent(intent);
545 }
546
547 private void resetIntent(final Account account, Jid with, final RtpEndUserState state) {
548 final Intent intent = new Intent(Intent.ACTION_VIEW);
549 intent.putExtra(EXTRA_WITH, with.asBareJid().toEscapedString());
550 intent.putExtra(EXTRA_ACCOUNT, account.getJid().toEscapedString());
551 intent.putExtra(EXTRA_LAST_REPORTED_STATE, state.toString());
552 setIntent(intent);
553 }
554}