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| 1 /* | |
| 2 * Copyright 2016 The WebRTC Project Authors. All rights reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #import "webrtc/modules/audio_device/ios/objc/RTCAudioSession.h" | |
| 12 | |
| 13 #import <UIKit/UIKit.h> | |
| 14 | |
| 15 #include "webrtc/base/atomicops.h" | |
| 16 #include "webrtc/base/checks.h" | |
| 17 #include "webrtc/base/criticalsection.h" | |
| 18 #include "webrtc/modules/audio_device/ios/audio_device_ios.h" | |
| 19 | |
| 20 #import "WebRTC/RTCLogging.h" | |
| 21 #import "webrtc/modules/audio_device/ios/objc/RTCAudioSession+Private.h" | |
| 22 #import "webrtc/modules/audio_device/ios/objc/RTCAudioSessionConfiguration.h" | |
| 23 | |
| 24 NSString * const kRTCAudioSessionErrorDomain = @"org.webrtc.RTCAudioSession"; | |
| 25 NSInteger const kRTCAudioSessionErrorLockRequired = -1; | |
| 26 NSInteger const kRTCAudioSessionErrorConfiguration = -2; | |
| 27 NSString * const kRTCAudioSessionOutputVolumeSelector = @"outputVolume"; | |
| 28 | |
| 29 // This class needs to be thread-safe because it is accessed from many threads. | |
| 30 // TODO(tkchin): Consider more granular locking. We're not expecting a lot of | |
| 31 // lock contention so coarse locks should be fine for now. | |
| 32 @implementation RTCAudioSession { | |
| 33 rtc::CriticalSection _crit; | |
| 34 AVAudioSession *_session; | |
| 35 volatile int _activationCount; | |
| 36 volatile int _lockRecursionCount; | |
| 37 volatile int _webRTCSessionCount; | |
| 38 BOOL _isActive; | |
| 39 BOOL _useManualAudio; | |
| 40 BOOL _isAudioEnabled; | |
| 41 BOOL _canPlayOrRecord; | |
| 42 BOOL _isInterrupted; | |
| 43 } | |
| 44 | |
| 45 @synthesize session = _session; | |
| 46 @synthesize delegates = _delegates; | |
| 47 | |
| 48 + (instancetype)sharedInstance { | |
| 49 static dispatch_once_t onceToken; | |
| 50 static RTCAudioSession *sharedInstance = nil; | |
| 51 dispatch_once(&onceToken, ^{ | |
| 52 sharedInstance = [[self alloc] init]; | |
| 53 }); | |
| 54 return sharedInstance; | |
| 55 } | |
| 56 | |
| 57 - (instancetype)init { | |
| 58 if (self = [super init]) { | |
| 59 _session = [AVAudioSession sharedInstance]; | |
| 60 | |
| 61 NSNotificationCenter *center = [NSNotificationCenter defaultCenter]; | |
| 62 [center addObserver:self | |
| 63 selector:@selector(handleInterruptionNotification:) | |
| 64 name:AVAudioSessionInterruptionNotification | |
| 65 object:nil]; | |
| 66 [center addObserver:self | |
| 67 selector:@selector(handleRouteChangeNotification:) | |
| 68 name:AVAudioSessionRouteChangeNotification | |
| 69 object:nil]; | |
| 70 [center addObserver:self | |
| 71 selector:@selector(handleMediaServicesWereLost:) | |
| 72 name:AVAudioSessionMediaServicesWereLostNotification | |
| 73 object:nil]; | |
| 74 [center addObserver:self | |
| 75 selector:@selector(handleMediaServicesWereReset:) | |
| 76 name:AVAudioSessionMediaServicesWereResetNotification | |
| 77 object:nil]; | |
| 78 // Posted on the main thread when the primary audio from other applications | |
| 79 // starts and stops. Foreground applications may use this notification as a | |
| 80 // hint to enable or disable audio that is secondary. | |
| 81 [center addObserver:self | |
| 82 selector:@selector(handleSilenceSecondaryAudioHintNotification:) | |
| 83 name:AVAudioSessionSilenceSecondaryAudioHintNotification | |
| 84 object:nil]; | |
| 85 // Also track foreground event in order to deal with interruption ended situ
ation. | |
| 86 [center addObserver:self | |
| 87 selector:@selector(handleApplicationDidBecomeActive:) | |
| 88 name:UIApplicationDidBecomeActiveNotification | |
| 89 object:nil]; | |
| 90 [_session addObserver:self | |
| 91 forKeyPath:kRTCAudioSessionOutputVolumeSelector | |
| 92 options:NSKeyValueObservingOptionNew | NSKeyValueObservingOpti
onOld | |
| 93 context:nil]; | |
| 94 | |
| 95 RTCLog(@"RTCAudioSession (%p): init.", self); | |
| 96 } | |
| 97 return self; | |
| 98 } | |
| 99 | |
| 100 - (void)dealloc { | |
| 101 [[NSNotificationCenter defaultCenter] removeObserver:self]; | |
| 102 [_session removeObserver:self forKeyPath:kRTCAudioSessionOutputVolumeSelector
context:nil]; | |
| 103 RTCLog(@"RTCAudioSession (%p): dealloc.", self); | |
| 104 } | |
| 105 | |
| 106 - (NSString *)description { | |
| 107 NSString *format = | |
| 108 @"RTCAudioSession: {\n" | |
| 109 " category: %@\n" | |
| 110 " categoryOptions: %ld\n" | |
| 111 " mode: %@\n" | |
| 112 " isActive: %d\n" | |
| 113 " sampleRate: %.2f\n" | |
| 114 " IOBufferDuration: %f\n" | |
| 115 " outputNumberOfChannels: %ld\n" | |
| 116 " inputNumberOfChannels: %ld\n" | |
| 117 " outputLatency: %f\n" | |
| 118 " inputLatency: %f\n" | |
| 119 " outputVolume: %f\n" | |
| 120 "}"; | |
| 121 NSString *description = [NSString stringWithFormat:format, | |
| 122 self.category, (long)self.categoryOptions, self.mode, | |
| 123 self.isActive, self.sampleRate, self.IOBufferDuration, | |
| 124 self.outputNumberOfChannels, self.inputNumberOfChannels, | |
| 125 self.outputLatency, self.inputLatency, self.outputVolume]; | |
| 126 return description; | |
| 127 } | |
| 128 | |
| 129 - (void)setIsActive:(BOOL)isActive { | |
| 130 @synchronized(self) { | |
| 131 _isActive = isActive; | |
| 132 } | |
| 133 } | |
| 134 | |
| 135 - (BOOL)isActive { | |
| 136 @synchronized(self) { | |
| 137 return _isActive; | |
| 138 } | |
| 139 } | |
| 140 | |
| 141 - (BOOL)isLocked { | |
| 142 return _lockRecursionCount > 0; | |
| 143 } | |
| 144 | |
| 145 - (void)setUseManualAudio:(BOOL)useManualAudio { | |
| 146 @synchronized(self) { | |
| 147 if (_useManualAudio == useManualAudio) { | |
| 148 return; | |
| 149 } | |
| 150 _useManualAudio = useManualAudio; | |
| 151 } | |
| 152 [self updateCanPlayOrRecord]; | |
| 153 } | |
| 154 | |
| 155 - (BOOL)useManualAudio { | |
| 156 @synchronized(self) { | |
| 157 return _useManualAudio; | |
| 158 } | |
| 159 } | |
| 160 | |
| 161 - (void)setIsAudioEnabled:(BOOL)isAudioEnabled { | |
| 162 @synchronized(self) { | |
| 163 if (_isAudioEnabled == isAudioEnabled) { | |
| 164 return; | |
| 165 } | |
| 166 _isAudioEnabled = isAudioEnabled; | |
| 167 } | |
| 168 [self updateCanPlayOrRecord]; | |
| 169 } | |
| 170 | |
| 171 - (BOOL)isAudioEnabled { | |
| 172 @synchronized(self) { | |
| 173 return _isAudioEnabled; | |
| 174 } | |
| 175 } | |
| 176 | |
| 177 // TODO(tkchin): Check for duplicates. | |
| 178 - (void)addDelegate:(id<RTCAudioSessionDelegate>)delegate { | |
| 179 RTCLog(@"Adding delegate: (%p)", delegate); | |
| 180 if (!delegate) { | |
| 181 return; | |
| 182 } | |
| 183 @synchronized(self) { | |
| 184 _delegates.push_back(delegate); | |
| 185 [self removeZeroedDelegates]; | |
| 186 } | |
| 187 } | |
| 188 | |
| 189 - (void)removeDelegate:(id<RTCAudioSessionDelegate>)delegate { | |
| 190 RTCLog(@"Removing delegate: (%p)", delegate); | |
| 191 if (!delegate) { | |
| 192 return; | |
| 193 } | |
| 194 @synchronized(self) { | |
| 195 _delegates.erase(std::remove(_delegates.begin(), | |
| 196 _delegates.end(), | |
| 197 delegate), | |
| 198 _delegates.end()); | |
| 199 [self removeZeroedDelegates]; | |
| 200 } | |
| 201 } | |
| 202 | |
| 203 #pragma clang diagnostic push | |
| 204 #pragma clang diagnostic ignored "-Wthread-safety-analysis" | |
| 205 | |
| 206 - (void)lockForConfiguration { | |
| 207 _crit.Enter(); | |
| 208 rtc::AtomicOps::Increment(&_lockRecursionCount); | |
| 209 } | |
| 210 | |
| 211 - (void)unlockForConfiguration { | |
| 212 // Don't let threads other than the one that called lockForConfiguration | |
| 213 // unlock. | |
| 214 if (_crit.TryEnter()) { | |
| 215 rtc::AtomicOps::Decrement(&_lockRecursionCount); | |
| 216 // One unlock for the tryLock, and another one to actually unlock. If this | |
| 217 // was called without anyone calling lock, we will hit an assertion. | |
| 218 _crit.Leave(); | |
| 219 _crit.Leave(); | |
| 220 } | |
| 221 } | |
| 222 | |
| 223 #pragma clang diagnostic pop | |
| 224 | |
| 225 #pragma mark - AVAudioSession proxy methods | |
| 226 | |
| 227 - (NSString *)category { | |
| 228 return self.session.category; | |
| 229 } | |
| 230 | |
| 231 - (AVAudioSessionCategoryOptions)categoryOptions { | |
| 232 return self.session.categoryOptions; | |
| 233 } | |
| 234 | |
| 235 - (NSString *)mode { | |
| 236 return self.session.mode; | |
| 237 } | |
| 238 | |
| 239 - (BOOL)secondaryAudioShouldBeSilencedHint { | |
| 240 return self.session.secondaryAudioShouldBeSilencedHint; | |
| 241 } | |
| 242 | |
| 243 - (AVAudioSessionRouteDescription *)currentRoute { | |
| 244 return self.session.currentRoute; | |
| 245 } | |
| 246 | |
| 247 - (NSInteger)maximumInputNumberOfChannels { | |
| 248 return self.session.maximumInputNumberOfChannels; | |
| 249 } | |
| 250 | |
| 251 - (NSInteger)maximumOutputNumberOfChannels { | |
| 252 return self.session.maximumOutputNumberOfChannels; | |
| 253 } | |
| 254 | |
| 255 - (float)inputGain { | |
| 256 return self.session.inputGain; | |
| 257 } | |
| 258 | |
| 259 - (BOOL)inputGainSettable { | |
| 260 return self.session.inputGainSettable; | |
| 261 } | |
| 262 | |
| 263 - (BOOL)inputAvailable { | |
| 264 return self.session.inputAvailable; | |
| 265 } | |
| 266 | |
| 267 - (NSArray<AVAudioSessionDataSourceDescription *> *)inputDataSources { | |
| 268 return self.session.inputDataSources; | |
| 269 } | |
| 270 | |
| 271 - (AVAudioSessionDataSourceDescription *)inputDataSource { | |
| 272 return self.session.inputDataSource; | |
| 273 } | |
| 274 | |
| 275 - (NSArray<AVAudioSessionDataSourceDescription *> *)outputDataSources { | |
| 276 return self.session.outputDataSources; | |
| 277 } | |
| 278 | |
| 279 - (AVAudioSessionDataSourceDescription *)outputDataSource { | |
| 280 return self.session.outputDataSource; | |
| 281 } | |
| 282 | |
| 283 - (double)sampleRate { | |
| 284 return self.session.sampleRate; | |
| 285 } | |
| 286 | |
| 287 - (double)preferredSampleRate { | |
| 288 return self.session.preferredSampleRate; | |
| 289 } | |
| 290 | |
| 291 - (NSInteger)inputNumberOfChannels { | |
| 292 return self.session.inputNumberOfChannels; | |
| 293 } | |
| 294 | |
| 295 - (NSInteger)outputNumberOfChannels { | |
| 296 return self.session.outputNumberOfChannels; | |
| 297 } | |
| 298 | |
| 299 - (float)outputVolume { | |
| 300 return self.session.outputVolume; | |
| 301 } | |
| 302 | |
| 303 - (NSTimeInterval)inputLatency { | |
| 304 return self.session.inputLatency; | |
| 305 } | |
| 306 | |
| 307 - (NSTimeInterval)outputLatency { | |
| 308 return self.session.outputLatency; | |
| 309 } | |
| 310 | |
| 311 - (NSTimeInterval)IOBufferDuration { | |
| 312 return self.session.IOBufferDuration; | |
| 313 } | |
| 314 | |
| 315 - (NSTimeInterval)preferredIOBufferDuration { | |
| 316 return self.session.preferredIOBufferDuration; | |
| 317 } | |
| 318 | |
| 319 // TODO(tkchin): Simplify the amount of locking happening here. Likely that we | |
| 320 // can just do atomic increments / decrements. | |
| 321 - (BOOL)setActive:(BOOL)active | |
| 322 error:(NSError **)outError { | |
| 323 if (![self checkLock:outError]) { | |
| 324 return NO; | |
| 325 } | |
| 326 int activationCount = _activationCount; | |
| 327 if (!active && activationCount == 0) { | |
| 328 RTCLogWarning(@"Attempting to deactivate without prior activation."); | |
| 329 } | |
| 330 BOOL success = YES; | |
| 331 BOOL isActive = self.isActive; | |
| 332 // Keep a local error so we can log it. | |
| 333 NSError *error = nil; | |
| 334 BOOL shouldSetActive = | |
| 335 (active && !isActive) || (!active && isActive && activationCount == 1); | |
| 336 // Attempt to activate if we're not active. | |
| 337 // Attempt to deactivate if we're active and it's the last unbalanced call. | |
| 338 if (shouldSetActive) { | |
| 339 AVAudioSession *session = self.session; | |
| 340 // AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation is used to ensure | |
| 341 // that other audio sessions that were interrupted by our session can return | |
| 342 // to their active state. It is recommended for VoIP apps to use this | |
| 343 // option. | |
| 344 AVAudioSessionSetActiveOptions options = | |
| 345 active ? 0 : AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation; | |
| 346 success = [session setActive:active | |
| 347 withOptions:options | |
| 348 error:&error]; | |
| 349 if (outError) { | |
| 350 *outError = error; | |
| 351 } | |
| 352 } | |
| 353 if (success) { | |
| 354 if (shouldSetActive) { | |
| 355 self.isActive = active; | |
| 356 } | |
| 357 if (active) { | |
| 358 [self incrementActivationCount]; | |
| 359 } | |
| 360 } else { | |
| 361 RTCLogError(@"Failed to setActive:%d. Error: %@", | |
| 362 active, error.localizedDescription); | |
| 363 } | |
| 364 // Decrement activation count on deactivation whether or not it succeeded. | |
| 365 if (!active) { | |
| 366 [self decrementActivationCount]; | |
| 367 } | |
| 368 RTCLog(@"Number of current activations: %d", _activationCount); | |
| 369 return success; | |
| 370 } | |
| 371 | |
| 372 - (BOOL)setCategory:(NSString *)category | |
| 373 withOptions:(AVAudioSessionCategoryOptions)options | |
| 374 error:(NSError **)outError { | |
| 375 if (![self checkLock:outError]) { | |
| 376 return NO; | |
| 377 } | |
| 378 return [self.session setCategory:category withOptions:options error:outError]; | |
| 379 } | |
| 380 | |
| 381 - (BOOL)setMode:(NSString *)mode error:(NSError **)outError { | |
| 382 if (![self checkLock:outError]) { | |
| 383 return NO; | |
| 384 } | |
| 385 return [self.session setMode:mode error:outError]; | |
| 386 } | |
| 387 | |
| 388 - (BOOL)setInputGain:(float)gain error:(NSError **)outError { | |
| 389 if (![self checkLock:outError]) { | |
| 390 return NO; | |
| 391 } | |
| 392 return [self.session setInputGain:gain error:outError]; | |
| 393 } | |
| 394 | |
| 395 - (BOOL)setPreferredSampleRate:(double)sampleRate error:(NSError **)outError { | |
| 396 if (![self checkLock:outError]) { | |
| 397 return NO; | |
| 398 } | |
| 399 return [self.session setPreferredSampleRate:sampleRate error:outError]; | |
| 400 } | |
| 401 | |
| 402 - (BOOL)setPreferredIOBufferDuration:(NSTimeInterval)duration | |
| 403 error:(NSError **)outError { | |
| 404 if (![self checkLock:outError]) { | |
| 405 return NO; | |
| 406 } | |
| 407 return [self.session setPreferredIOBufferDuration:duration error:outError]; | |
| 408 } | |
| 409 | |
| 410 - (BOOL)setPreferredInputNumberOfChannels:(NSInteger)count | |
| 411 error:(NSError **)outError { | |
| 412 if (![self checkLock:outError]) { | |
| 413 return NO; | |
| 414 } | |
| 415 return [self.session setPreferredInputNumberOfChannels:count error:outError]; | |
| 416 } | |
| 417 - (BOOL)setPreferredOutputNumberOfChannels:(NSInteger)count | |
| 418 error:(NSError **)outError { | |
| 419 if (![self checkLock:outError]) { | |
| 420 return NO; | |
| 421 } | |
| 422 return [self.session setPreferredOutputNumberOfChannels:count error:outError]; | |
| 423 } | |
| 424 | |
| 425 - (BOOL)overrideOutputAudioPort:(AVAudioSessionPortOverride)portOverride | |
| 426 error:(NSError **)outError { | |
| 427 if (![self checkLock:outError]) { | |
| 428 return NO; | |
| 429 } | |
| 430 return [self.session overrideOutputAudioPort:portOverride error:outError]; | |
| 431 } | |
| 432 | |
| 433 - (BOOL)setPreferredInput:(AVAudioSessionPortDescription *)inPort | |
| 434 error:(NSError **)outError { | |
| 435 if (![self checkLock:outError]) { | |
| 436 return NO; | |
| 437 } | |
| 438 return [self.session setPreferredInput:inPort error:outError]; | |
| 439 } | |
| 440 | |
| 441 - (BOOL)setInputDataSource:(AVAudioSessionDataSourceDescription *)dataSource | |
| 442 error:(NSError **)outError { | |
| 443 if (![self checkLock:outError]) { | |
| 444 return NO; | |
| 445 } | |
| 446 return [self.session setInputDataSource:dataSource error:outError]; | |
| 447 } | |
| 448 | |
| 449 - (BOOL)setOutputDataSource:(AVAudioSessionDataSourceDescription *)dataSource | |
| 450 error:(NSError **)outError { | |
| 451 if (![self checkLock:outError]) { | |
| 452 return NO; | |
| 453 } | |
| 454 return [self.session setOutputDataSource:dataSource error:outError]; | |
| 455 } | |
| 456 | |
| 457 #pragma mark - Notifications | |
| 458 | |
| 459 - (void)handleInterruptionNotification:(NSNotification *)notification { | |
| 460 NSNumber* typeNumber = | |
| 461 notification.userInfo[AVAudioSessionInterruptionTypeKey]; | |
| 462 AVAudioSessionInterruptionType type = | |
| 463 (AVAudioSessionInterruptionType)typeNumber.unsignedIntegerValue; | |
| 464 switch (type) { | |
| 465 case AVAudioSessionInterruptionTypeBegan: | |
| 466 RTCLog(@"Audio session interruption began."); | |
| 467 self.isActive = NO; | |
| 468 self.isInterrupted = YES; | |
| 469 [self notifyDidBeginInterruption]; | |
| 470 break; | |
| 471 case AVAudioSessionInterruptionTypeEnded: { | |
| 472 RTCLog(@"Audio session interruption ended."); | |
| 473 self.isInterrupted = NO; | |
| 474 [self updateAudioSessionAfterEvent]; | |
| 475 NSNumber *optionsNumber = | |
| 476 notification.userInfo[AVAudioSessionInterruptionOptionKey]; | |
| 477 AVAudioSessionInterruptionOptions options = | |
| 478 optionsNumber.unsignedIntegerValue; | |
| 479 BOOL shouldResume = | |
| 480 options & AVAudioSessionInterruptionOptionShouldResume; | |
| 481 [self notifyDidEndInterruptionWithShouldResumeSession:shouldResume]; | |
| 482 break; | |
| 483 } | |
| 484 } | |
| 485 } | |
| 486 | |
| 487 - (void)handleRouteChangeNotification:(NSNotification *)notification { | |
| 488 // Get reason for current route change. | |
| 489 NSNumber* reasonNumber = | |
| 490 notification.userInfo[AVAudioSessionRouteChangeReasonKey]; | |
| 491 AVAudioSessionRouteChangeReason reason = | |
| 492 (AVAudioSessionRouteChangeReason)reasonNumber.unsignedIntegerValue; | |
| 493 RTCLog(@"Audio route changed:"); | |
| 494 switch (reason) { | |
| 495 case AVAudioSessionRouteChangeReasonUnknown: | |
| 496 RTCLog(@"Audio route changed: ReasonUnknown"); | |
| 497 break; | |
| 498 case AVAudioSessionRouteChangeReasonNewDeviceAvailable: | |
| 499 RTCLog(@"Audio route changed: NewDeviceAvailable"); | |
| 500 break; | |
| 501 case AVAudioSessionRouteChangeReasonOldDeviceUnavailable: | |
| 502 RTCLog(@"Audio route changed: OldDeviceUnavailable"); | |
| 503 break; | |
| 504 case AVAudioSessionRouteChangeReasonCategoryChange: | |
| 505 RTCLog(@"Audio route changed: CategoryChange to :%@", | |
| 506 self.session.category); | |
| 507 break; | |
| 508 case AVAudioSessionRouteChangeReasonOverride: | |
| 509 RTCLog(@"Audio route changed: Override"); | |
| 510 break; | |
| 511 case AVAudioSessionRouteChangeReasonWakeFromSleep: | |
| 512 RTCLog(@"Audio route changed: WakeFromSleep"); | |
| 513 break; | |
| 514 case AVAudioSessionRouteChangeReasonNoSuitableRouteForCategory: | |
| 515 RTCLog(@"Audio route changed: NoSuitableRouteForCategory"); | |
| 516 break; | |
| 517 case AVAudioSessionRouteChangeReasonRouteConfigurationChange: | |
| 518 RTCLog(@"Audio route changed: RouteConfigurationChange"); | |
| 519 break; | |
| 520 } | |
| 521 AVAudioSessionRouteDescription* previousRoute = | |
| 522 notification.userInfo[AVAudioSessionRouteChangePreviousRouteKey]; | |
| 523 // Log previous route configuration. | |
| 524 RTCLog(@"Previous route: %@\nCurrent route:%@", | |
| 525 previousRoute, self.session.currentRoute); | |
| 526 [self notifyDidChangeRouteWithReason:reason previousRoute:previousRoute]; | |
| 527 } | |
| 528 | |
| 529 - (void)handleMediaServicesWereLost:(NSNotification *)notification { | |
| 530 RTCLog(@"Media services were lost."); | |
| 531 [self updateAudioSessionAfterEvent]; | |
| 532 [self notifyMediaServicesWereLost]; | |
| 533 } | |
| 534 | |
| 535 - (void)handleMediaServicesWereReset:(NSNotification *)notification { | |
| 536 RTCLog(@"Media services were reset."); | |
| 537 [self updateAudioSessionAfterEvent]; | |
| 538 [self notifyMediaServicesWereReset]; | |
| 539 } | |
| 540 | |
| 541 - (void)handleSilenceSecondaryAudioHintNotification:(NSNotification *)notificati
on { | |
| 542 // TODO(henrika): just adding logs here for now until we know if we are ever | |
| 543 // see this notification and might be affected by it or if further actions | |
| 544 // are required. | |
| 545 NSNumber *typeNumber = | |
| 546 notification.userInfo[AVAudioSessionSilenceSecondaryAudioHintTypeKey]; | |
| 547 AVAudioSessionSilenceSecondaryAudioHintType type = | |
| 548 (AVAudioSessionSilenceSecondaryAudioHintType)typeNumber.unsignedIntegerVal
ue; | |
| 549 switch (type) { | |
| 550 case AVAudioSessionSilenceSecondaryAudioHintTypeBegin: | |
| 551 RTCLog(@"Another application's primary audio has started."); | |
| 552 break; | |
| 553 case AVAudioSessionSilenceSecondaryAudioHintTypeEnd: | |
| 554 RTCLog(@"Another application's primary audio has stopped."); | |
| 555 break; | |
| 556 } | |
| 557 } | |
| 558 | |
| 559 - (void)handleApplicationDidBecomeActive:(NSNotification *)notification { | |
| 560 RTCLog(@"Application became active after an interruption. Treating as interrup
tion " | |
| 561 " end. isInterrupted changed from %d to 0.", self.isInterrupted); | |
| 562 if (self.isInterrupted) { | |
| 563 self.isInterrupted = NO; | |
| 564 [self updateAudioSessionAfterEvent]; | |
| 565 } | |
| 566 // Always treat application becoming active as an interruption end event. | |
| 567 [self notifyDidEndInterruptionWithShouldResumeSession:YES]; | |
| 568 } | |
| 569 | |
| 570 #pragma mark - Private | |
| 571 | |
| 572 + (NSError *)lockError { | |
| 573 NSDictionary *userInfo = @{ | |
| 574 NSLocalizedDescriptionKey: | |
| 575 @"Must call lockForConfiguration before calling this method." | |
| 576 }; | |
| 577 NSError *error = | |
| 578 [[NSError alloc] initWithDomain:kRTCAudioSessionErrorDomain | |
| 579 code:kRTCAudioSessionErrorLockRequired | |
| 580 userInfo:userInfo]; | |
| 581 return error; | |
| 582 } | |
| 583 | |
| 584 - (std::vector<__weak id<RTCAudioSessionDelegate> >)delegates { | |
| 585 @synchronized(self) { | |
| 586 // Note: this returns a copy. | |
| 587 return _delegates; | |
| 588 } | |
| 589 } | |
| 590 | |
| 591 // TODO(tkchin): check for duplicates. | |
| 592 - (void)pushDelegate:(id<RTCAudioSessionDelegate>)delegate { | |
| 593 @synchronized(self) { | |
| 594 _delegates.insert(_delegates.begin(), delegate); | |
| 595 } | |
| 596 } | |
| 597 | |
| 598 - (void)removeZeroedDelegates { | |
| 599 @synchronized(self) { | |
| 600 _delegates.erase( | |
| 601 std::remove_if(_delegates.begin(), | |
| 602 _delegates.end(), | |
| 603 [](id delegate) -> bool { return delegate == nil; }), | |
| 604 _delegates.end()); | |
| 605 } | |
| 606 } | |
| 607 | |
| 608 - (int)activationCount { | |
| 609 return _activationCount; | |
| 610 } | |
| 611 | |
| 612 - (int)incrementActivationCount { | |
| 613 RTCLog(@"Incrementing activation count."); | |
| 614 return rtc::AtomicOps::Increment(&_activationCount); | |
| 615 } | |
| 616 | |
| 617 - (NSInteger)decrementActivationCount { | |
| 618 RTCLog(@"Decrementing activation count."); | |
| 619 return rtc::AtomicOps::Decrement(&_activationCount); | |
| 620 } | |
| 621 | |
| 622 - (int)webRTCSessionCount { | |
| 623 return _webRTCSessionCount; | |
| 624 } | |
| 625 | |
| 626 - (BOOL)canPlayOrRecord { | |
| 627 return !self.useManualAudio || self.isAudioEnabled; | |
| 628 } | |
| 629 | |
| 630 - (BOOL)isInterrupted { | |
| 631 @synchronized(self) { | |
| 632 return _isInterrupted; | |
| 633 } | |
| 634 } | |
| 635 | |
| 636 - (void)setIsInterrupted:(BOOL)isInterrupted { | |
| 637 @synchronized(self) { | |
| 638 if (_isInterrupted == isInterrupted) { | |
| 639 return; | |
| 640 } | |
| 641 _isInterrupted = isInterrupted; | |
| 642 } | |
| 643 } | |
| 644 | |
| 645 - (BOOL)checkLock:(NSError **)outError { | |
| 646 // Check ivar instead of trying to acquire lock so that we won't accidentally | |
| 647 // acquire lock if it hasn't already been called. | |
| 648 if (!self.isLocked) { | |
| 649 if (outError) { | |
| 650 *outError = [RTCAudioSession lockError]; | |
| 651 } | |
| 652 return NO; | |
| 653 } | |
| 654 return YES; | |
| 655 } | |
| 656 | |
| 657 - (BOOL)beginWebRTCSession:(NSError **)outError { | |
| 658 if (outError) { | |
| 659 *outError = nil; | |
| 660 } | |
| 661 if (![self checkLock:outError]) { | |
| 662 return NO; | |
| 663 } | |
| 664 rtc::AtomicOps::Increment(&_webRTCSessionCount); | |
| 665 [self notifyDidStartPlayOrRecord]; | |
| 666 return YES; | |
| 667 } | |
| 668 | |
| 669 - (BOOL)endWebRTCSession:(NSError **)outError { | |
| 670 if (outError) { | |
| 671 *outError = nil; | |
| 672 } | |
| 673 if (![self checkLock:outError]) { | |
| 674 return NO; | |
| 675 } | |
| 676 rtc::AtomicOps::Decrement(&_webRTCSessionCount); | |
| 677 [self notifyDidStopPlayOrRecord]; | |
| 678 return YES; | |
| 679 } | |
| 680 | |
| 681 - (BOOL)configureWebRTCSession:(NSError **)outError { | |
| 682 if (outError) { | |
| 683 *outError = nil; | |
| 684 } | |
| 685 if (![self checkLock:outError]) { | |
| 686 return NO; | |
| 687 } | |
| 688 RTCLog(@"Configuring audio session for WebRTC."); | |
| 689 | |
| 690 // Configure the AVAudioSession and activate it. | |
| 691 // Provide an error even if there isn't one so we can log it. | |
| 692 NSError *error = nil; | |
| 693 RTCAudioSessionConfiguration *webRTCConfig = | |
| 694 [RTCAudioSessionConfiguration webRTCConfiguration]; | |
| 695 if (![self setConfiguration:webRTCConfig active:YES error:&error]) { | |
| 696 RTCLogError(@"Failed to set WebRTC audio configuration: %@", | |
| 697 error.localizedDescription); | |
| 698 // Do not call setActive:NO if setActive:YES failed. | |
| 699 if (outError) { | |
| 700 *outError = error; | |
| 701 } | |
| 702 return NO; | |
| 703 } | |
| 704 | |
| 705 // Ensure that the device currently supports audio input. | |
| 706 // TODO(tkchin): Figure out if this is really necessary. | |
| 707 if (!self.inputAvailable) { | |
| 708 RTCLogError(@"No audio input path is available!"); | |
| 709 [self unconfigureWebRTCSession:nil]; | |
| 710 if (outError) { | |
| 711 *outError = [self configurationErrorWithDescription:@"No input path."]; | |
| 712 } | |
| 713 return NO; | |
| 714 } | |
| 715 | |
| 716 // It can happen (e.g. in combination with BT devices) that the attempt to set | |
| 717 // the preferred sample rate for WebRTC (48kHz) fails. If so, make a new | |
| 718 // configuration attempt using the sample rate that worked using the active | |
| 719 // audio session. A typical case is that only 8 or 16kHz can be set, e.g. in | |
| 720 // combination with BT headsets. Using this "trick" seems to avoid a state | |
| 721 // where Core Audio asks for a different number of audio frames than what the | |
| 722 // session's I/O buffer duration corresponds to. | |
| 723 // TODO(henrika): this fix resolves bugs.webrtc.org/6004 but it has only been | |
| 724 // tested on a limited set of iOS devices and BT devices. | |
| 725 double sessionSampleRate = self.sampleRate; | |
| 726 double preferredSampleRate = webRTCConfig.sampleRate; | |
| 727 if (sessionSampleRate != preferredSampleRate) { | |
| 728 RTCLogWarning( | |
| 729 @"Current sample rate (%.2f) is not the preferred rate (%.2f)", | |
| 730 sessionSampleRate, preferredSampleRate); | |
| 731 if (![self setPreferredSampleRate:sessionSampleRate | |
| 732 error:&error]) { | |
| 733 RTCLogError(@"Failed to set preferred sample rate: %@", | |
| 734 error.localizedDescription); | |
| 735 if (outError) { | |
| 736 *outError = error; | |
| 737 } | |
| 738 } | |
| 739 } | |
| 740 | |
| 741 return YES; | |
| 742 } | |
| 743 | |
| 744 - (BOOL)unconfigureWebRTCSession:(NSError **)outError { | |
| 745 if (outError) { | |
| 746 *outError = nil; | |
| 747 } | |
| 748 if (![self checkLock:outError]) { | |
| 749 return NO; | |
| 750 } | |
| 751 RTCLog(@"Unconfiguring audio session for WebRTC."); | |
| 752 [self setActive:NO error:outError]; | |
| 753 | |
| 754 return YES; | |
| 755 } | |
| 756 | |
| 757 - (NSError *)configurationErrorWithDescription:(NSString *)description { | |
| 758 NSDictionary* userInfo = @{ | |
| 759 NSLocalizedDescriptionKey: description, | |
| 760 }; | |
| 761 return [[NSError alloc] initWithDomain:kRTCAudioSessionErrorDomain | |
| 762 code:kRTCAudioSessionErrorConfiguration | |
| 763 userInfo:userInfo]; | |
| 764 } | |
| 765 | |
| 766 - (void)updateAudioSessionAfterEvent { | |
| 767 BOOL shouldActivate = self.activationCount > 0; | |
| 768 AVAudioSessionSetActiveOptions options = shouldActivate ? | |
| 769 0 : AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation; | |
| 770 NSError *error = nil; | |
| 771 if ([self.session setActive:shouldActivate | |
| 772 withOptions:options | |
| 773 error:&error]) { | |
| 774 self.isActive = shouldActivate; | |
| 775 } else { | |
| 776 RTCLogError(@"Failed to set session active to %d. Error:%@", | |
| 777 shouldActivate, error.localizedDescription); | |
| 778 } | |
| 779 } | |
| 780 | |
| 781 - (void)updateCanPlayOrRecord { | |
| 782 BOOL canPlayOrRecord = NO; | |
| 783 BOOL shouldNotify = NO; | |
| 784 @synchronized(self) { | |
| 785 canPlayOrRecord = !self.useManualAudio || self.isAudioEnabled; | |
| 786 if (_canPlayOrRecord == canPlayOrRecord) { | |
| 787 return; | |
| 788 } | |
| 789 _canPlayOrRecord = canPlayOrRecord; | |
| 790 shouldNotify = YES; | |
| 791 } | |
| 792 if (shouldNotify) { | |
| 793 [self notifyDidChangeCanPlayOrRecord:canPlayOrRecord]; | |
| 794 } | |
| 795 } | |
| 796 | |
| 797 - (void)audioSessionDidActivate:(AVAudioSession *)session { | |
| 798 if (_session != session) { | |
| 799 RTCLogError(@"audioSessionDidActivate called on different AVAudioSession"); | |
| 800 } | |
| 801 [self incrementActivationCount]; | |
| 802 self.isActive = YES; | |
| 803 } | |
| 804 | |
| 805 - (void)audioSessionDidDeactivate:(AVAudioSession *)session { | |
| 806 if (_session != session) { | |
| 807 RTCLogError(@"audioSessionDidDeactivate called on different AVAudioSession")
; | |
| 808 } | |
| 809 self.isActive = NO; | |
| 810 [self decrementActivationCount]; | |
| 811 } | |
| 812 | |
| 813 - (void)observeValueForKeyPath:(NSString *)keyPath | |
| 814 ofObject:(id)object | |
| 815 change:(NSDictionary *)change | |
| 816 context:(void *)context { | |
| 817 if (object == _session) { | |
| 818 NSNumber *newVolume = change[NSKeyValueChangeNewKey]; | |
| 819 RTCLog(@"OutputVolumeDidChange to %f", newVolume.floatValue); | |
| 820 [self notifyDidChangeOutputVolume:newVolume.floatValue]; | |
| 821 } else { | |
| 822 [super observeValueForKeyPath:keyPath | |
| 823 ofObject:object | |
| 824 change:change | |
| 825 context:context]; | |
| 826 } | |
| 827 } | |
| 828 | |
| 829 - (void)notifyDidBeginInterruption { | |
| 830 for (auto delegate : self.delegates) { | |
| 831 SEL sel = @selector(audioSessionDidBeginInterruption:); | |
| 832 if ([delegate respondsToSelector:sel]) { | |
| 833 [delegate audioSessionDidBeginInterruption:self]; | |
| 834 } | |
| 835 } | |
| 836 } | |
| 837 | |
| 838 - (void)notifyDidEndInterruptionWithShouldResumeSession: | |
| 839 (BOOL)shouldResumeSession { | |
| 840 for (auto delegate : self.delegates) { | |
| 841 SEL sel = @selector(audioSessionDidEndInterruption:shouldResumeSession:); | |
| 842 if ([delegate respondsToSelector:sel]) { | |
| 843 [delegate audioSessionDidEndInterruption:self | |
| 844 shouldResumeSession:shouldResumeSession]; | |
| 845 } | |
| 846 } | |
| 847 } | |
| 848 | |
| 849 - (void)notifyDidChangeRouteWithReason:(AVAudioSessionRouteChangeReason)reason | |
| 850 previousRoute:(AVAudioSessionRouteDescription *)previousRoute { | |
| 851 for (auto delegate : self.delegates) { | |
| 852 SEL sel = @selector(audioSessionDidChangeRoute:reason:previousRoute:); | |
| 853 if ([delegate respondsToSelector:sel]) { | |
| 854 [delegate audioSessionDidChangeRoute:self | |
| 855 reason:reason | |
| 856 previousRoute:previousRoute]; | |
| 857 } | |
| 858 } | |
| 859 } | |
| 860 | |
| 861 - (void)notifyMediaServicesWereLost { | |
| 862 for (auto delegate : self.delegates) { | |
| 863 SEL sel = @selector(audioSessionMediaServerTerminated:); | |
| 864 if ([delegate respondsToSelector:sel]) { | |
| 865 [delegate audioSessionMediaServerTerminated:self]; | |
| 866 } | |
| 867 } | |
| 868 } | |
| 869 | |
| 870 - (void)notifyMediaServicesWereReset { | |
| 871 for (auto delegate : self.delegates) { | |
| 872 SEL sel = @selector(audioSessionMediaServerReset:); | |
| 873 if ([delegate respondsToSelector:sel]) { | |
| 874 [delegate audioSessionMediaServerReset:self]; | |
| 875 } | |
| 876 } | |
| 877 } | |
| 878 | |
| 879 - (void)notifyDidChangeCanPlayOrRecord:(BOOL)canPlayOrRecord { | |
| 880 for (auto delegate : self.delegates) { | |
| 881 SEL sel = @selector(audioSession:didChangeCanPlayOrRecord:); | |
| 882 if ([delegate respondsToSelector:sel]) { | |
| 883 [delegate audioSession:self didChangeCanPlayOrRecord:canPlayOrRecord]; | |
| 884 } | |
| 885 } | |
| 886 } | |
| 887 | |
| 888 - (void)notifyDidStartPlayOrRecord { | |
| 889 for (auto delegate : self.delegates) { | |
| 890 SEL sel = @selector(audioSessionDidStartPlayOrRecord:); | |
| 891 if ([delegate respondsToSelector:sel]) { | |
| 892 [delegate audioSessionDidStartPlayOrRecord:self]; | |
| 893 } | |
| 894 } | |
| 895 } | |
| 896 | |
| 897 - (void)notifyDidStopPlayOrRecord { | |
| 898 for (auto delegate : self.delegates) { | |
| 899 SEL sel = @selector(audioSessionDidStopPlayOrRecord:); | |
| 900 if ([delegate respondsToSelector:sel]) { | |
| 901 [delegate audioSessionDidStopPlayOrRecord:self]; | |
| 902 } | |
| 903 } | |
| 904 } | |
| 905 | |
| 906 - (void)notifyDidChangeOutputVolume:(float)volume { | |
| 907 for (auto delegate : self.delegates) { | |
| 908 SEL sel = @selector(audioSession:didChangeOutputVolume:); | |
| 909 if ([delegate respondsToSelector:sel]) { | |
| 910 [delegate audioSession:self didChangeOutputVolume:volume]; | |
| 911 } | |
| 912 } | |
| 913 } | |
| 914 | |
| 915 @end | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2855023003:
Move RTCAudioSession* files modules/audio_device/ -> sdk/Framework. (Closed)
