1 /* 2 * Copyright (C) 2009 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 18 #include <stdint.h> 19 #include <sys/types.h> 20 #include <cutils/config_utils.h> 21 #include <cutils/misc.h> 22 #include <utils/Timers.h> 23 #include <utils/Errors.h> 24 #include <utils/KeyedVector.h> 25 #include <utils/SortedVector.h> 26 #include <hardware_legacy/AudioPolicyInterface.h> 27 28 29 namespace android_audio_legacy { 30 using android::KeyedVector; 31 using android::DefaultKeyedVector; 32 using android::SortedVector; 33 34 // ---------------------------------------------------------------------------- 35 36 #define MAX_DEVICE_ADDRESS_LEN 20 37 // Attenuation applied to STRATEGY_SONIFICATION streams when a headset is connected: 6dB 38 #define SONIFICATION_HEADSET_VOLUME_FACTOR 0.5 39 // Min volume for STRATEGY_SONIFICATION streams when limited by music volume: -36dB 40 #define SONIFICATION_HEADSET_VOLUME_MIN 0.016 41 // Time in milliseconds during which we consider that music is still active after a music 42 // track was stopped - see computeVolume() 43 #define SONIFICATION_HEADSET_MUSIC_DELAY 5000 44 // Time in milliseconds after media stopped playing during which we consider that the 45 // sonification should be as unobtrusive as during the time media was playing. 46 #define SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY 5000 47 // Time in milliseconds during witch some streams are muted while the audio path 48 // is switched 49 #define MUTE_TIME_MS 2000 50 51 #define NUM_TEST_OUTPUTS 5 52 53 #define NUM_VOL_CURVE_KNEES 2 54 55 // ---------------------------------------------------------------------------- 56 // AudioPolicyManagerBase implements audio policy manager behavior common to all platforms. 57 // Each platform must implement an AudioPolicyManager class derived from AudioPolicyManagerBase 58 // and override methods for which the platform specific behavior differs from the implementation 59 // in AudioPolicyManagerBase. Even if no specific behavior is required, the AudioPolicyManager 60 // class must be implemented as well as the class factory function createAudioPolicyManager() 61 // and provided in a shared library libaudiopolicy.so. 62 // ---------------------------------------------------------------------------- 63 64 class AudioPolicyManagerBase: public AudioPolicyInterface 65 #ifdef AUDIO_POLICY_TEST 66 , public Thread 67 #endif //AUDIO_POLICY_TEST 68 { 69 70 public: 71 AudioPolicyManagerBase(AudioPolicyClientInterface *clientInterface); 72 virtual ~AudioPolicyManagerBase(); 73 74 // AudioPolicyInterface 75 virtual status_t setDeviceConnectionState(AudioSystem::audio_devices device, 76 AudioSystem::device_connection_state state, 77 const char *device_address); 78 virtual AudioSystem::device_connection_state getDeviceConnectionState(AudioSystem::audio_devices device, 79 const char *device_address); 80 virtual void setPhoneState(int state); 81 virtual void setForceUse(AudioSystem::force_use usage, AudioSystem::forced_config config); 82 virtual AudioSystem::forced_config getForceUse(AudioSystem::force_use usage); 83 virtual void setSystemProperty(const char* property, const char* value); 84 virtual status_t initCheck(); 85 virtual audio_io_handle_t getOutput(AudioSystem::stream_type stream, 86 uint32_t samplingRate = 0, 87 uint32_t format = AudioSystem::FORMAT_DEFAULT, 88 uint32_t channels = 0, 89 AudioSystem::output_flags flags = 90 AudioSystem::OUTPUT_FLAG_INDIRECT); 91 virtual status_t startOutput(audio_io_handle_t output, 92 AudioSystem::stream_type stream, 93 int session = 0); 94 virtual status_t stopOutput(audio_io_handle_t output, 95 AudioSystem::stream_type stream, 96 int session = 0); 97 virtual void releaseOutput(audio_io_handle_t output); 98 virtual audio_io_handle_t getInput(int inputSource, 99 uint32_t samplingRate, 100 uint32_t format, 101 uint32_t channels, 102 AudioSystem::audio_in_acoustics acoustics); 103 104 // indicates to the audio policy manager that the input starts being used. 105 virtual status_t startInput(audio_io_handle_t input); 106 107 // indicates to the audio policy manager that the input stops being used. 108 virtual status_t stopInput(audio_io_handle_t input); 109 virtual void releaseInput(audio_io_handle_t input); 110 virtual void initStreamVolume(AudioSystem::stream_type stream, 111 int indexMin, 112 int indexMax); 113 virtual status_t setStreamVolumeIndex(AudioSystem::stream_type stream, 114 int index, 115 audio_devices_t device); 116 virtual status_t getStreamVolumeIndex(AudioSystem::stream_type stream, 117 int *index, 118 audio_devices_t device); 119 120 // return the strategy corresponding to a given stream type 121 virtual uint32_t getStrategyForStream(AudioSystem::stream_type stream); 122 123 // return the enabled output devices for the given stream type 124 virtual audio_devices_t getDevicesForStream(AudioSystem::stream_type stream); 125 126 virtual audio_io_handle_t getOutputForEffect(effect_descriptor_t *desc); 127 virtual status_t registerEffect(effect_descriptor_t *desc, 128 audio_io_handle_t io, 129 uint32_t strategy, 130 int session, 131 int id); 132 virtual status_t unregisterEffect(int id); 133 virtual status_t setEffectEnabled(int id, bool enabled); 134 135 virtual bool isStreamActive(int stream, uint32_t inPastMs = 0) const; 136 137 virtual status_t dump(int fd); 138 139 protected: 140 141 enum routing_strategy { 142 STRATEGY_MEDIA, 143 STRATEGY_PHONE, 144 STRATEGY_SONIFICATION, 145 STRATEGY_SONIFICATION_RESPECTFUL, 146 STRATEGY_DTMF, 147 STRATEGY_ENFORCED_AUDIBLE, 148 NUM_STRATEGIES 149 }; 150 151 // 4 points to define the volume attenuation curve, each characterized by the volume 152 // index (from 0 to 100) at which they apply, and the attenuation in dB at that index. 153 // we use 100 steps to avoid rounding errors when computing the volume in volIndexToAmpl() 154 155 enum { VOLMIN = 0, VOLKNEE1 = 1, VOLKNEE2 = 2, VOLMAX = 3, VOLCNT = 4}; 156 157 class VolumeCurvePoint 158 { 159 public: 160 int mIndex; 161 float mDBAttenuation; 162 }; 163 164 // device categories used for volume curve management. 165 enum device_category { 166 DEVICE_CATEGORY_HEADSET, 167 DEVICE_CATEGORY_SPEAKER, 168 DEVICE_CATEGORY_EARPIECE, 169 DEVICE_CATEGORY_CNT 170 }; 171 172 class IOProfile; 173 174 class HwModule { 175 public: 176 HwModule(const char *name); 177 ~HwModule(); 178 179 void dump(int fd); 180 181 const char *const mName; // base name of the audio HW module (primary, a2dp ...) 182 audio_module_handle_t mHandle; 183 Vector <IOProfile *> mOutputProfiles; // output profiles exposed by this module 184 Vector <IOProfile *> mInputProfiles; // input profiles exposed by this module 185 }; 186 187 // the IOProfile class describes the capabilities of an output or input stream. 188 // It is currently assumed that all combination of listed parameters are supported. 189 // It is used by the policy manager to determine if an output or input is suitable for 190 // a given use case, open/close it accordingly and connect/disconnect audio tracks 191 // to/from it. 192 class IOProfile 193 { 194 public: 195 IOProfile(HwModule *module); 196 ~IOProfile(); 197 198 bool isCompatibleProfile(audio_devices_t device, 199 uint32_t samplingRate, 200 uint32_t format, 201 uint32_t channelMask, 202 audio_output_flags_t flags) const; 203 204 void dump(int fd); 205 206 // by convention, "0' in the first entry in mSamplingRates, mChannelMasks or mFormats 207 // indicates the supported parameters should be read from the output stream 208 // after it is opened for the first time 209 Vector <uint32_t> mSamplingRates; // supported sampling rates 210 Vector <audio_channel_mask_t> mChannelMasks; // supported channel masks 211 Vector <audio_format_t> mFormats; // supported audio formats 212 audio_devices_t mSupportedDevices; // supported devices (devices this output can be 213 // routed to) 214 audio_output_flags_t mFlags; // attribute flags (e.g primary output, 215 // direct output...). For outputs only. 216 HwModule *mModule; // audio HW module exposing this I/O stream 217 }; 218 219 // default volume curve 220 static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManagerBase::VOLCNT]; 221 // default volume curve for media strategy 222 static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManagerBase::VOLCNT]; 223 // volume curve for media strategy on speakers 224 static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManagerBase::VOLCNT]; 225 // volume curve for sonification strategy on speakers 226 static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManagerBase::VOLCNT]; 227 static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManagerBase::VOLCNT]; 228 static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManagerBase::VOLCNT]; 229 // default volume curves per stream and device category. See initializeVolumeCurves() 230 static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][DEVICE_CATEGORY_CNT]; 231 232 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output 233 // and keep track of the usage of this output by each audio stream type. 234 class AudioOutputDescriptor 235 { 236 public: 237 AudioOutputDescriptor(const IOProfile *profile); 238 239 status_t dump(int fd); 240 241 audio_devices_t device(); 242 void changeRefCount(AudioSystem::stream_type, int delta); 243 uint32_t refCount(); 244 uint32_t strategyRefCount(routing_strategy strategy); 245 bool isUsedByStrategy(routing_strategy strategy) { return (strategyRefCount(strategy) != 0);} 246 bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); } 247 audio_devices_t supportedDevices(); 248 uint32_t latency(); 249 bool sharesHwModuleWith(const AudioOutputDescriptor *outputDesc); 250 251 audio_io_handle_t mId; // output handle 252 uint32_t mSamplingRate; // 253 audio_format_t mFormat; // 254 audio_channel_mask_t mChannelMask; // output configuration 255 uint32_t mLatency; // 256 audio_output_flags_t mFlags; // 257 audio_devices_t mDevice; // current device this output is routed to 258 uint32_t mRefCount[AudioSystem::NUM_STREAM_TYPES]; // number of streams of each type using this output 259 nsecs_t mStopTime[AudioSystem::NUM_STREAM_TYPES]; 260 AudioOutputDescriptor *mOutput1; // used by duplicated outputs: first output 261 AudioOutputDescriptor *mOutput2; // used by duplicated outputs: second output 262 float mCurVolume[AudioSystem::NUM_STREAM_TYPES]; // current stream volume 263 int mMuteCount[AudioSystem::NUM_STREAM_TYPES]; // mute request counter 264 const IOProfile *mProfile; // I/O profile this output derives from 265 bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible 266 // device selection. See checkDeviceMuteStrategies() 267 }; 268 269 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 270 // and keep track of the usage of this input. 271 class AudioInputDescriptor 272 { 273 public: 274 AudioInputDescriptor(const IOProfile *profile); 275 276 status_t dump(int fd); 277 278 uint32_t mSamplingRate; // 279 audio_format_t mFormat; // input configuration 280 audio_channel_mask_t mChannelMask; // 281 audio_devices_t mDevice; // current device this input is routed to 282 uint32_t mRefCount; // number of AudioRecord clients using this output 283 int mInputSource; // input source selected by application (mediarecorder.h) 284 const IOProfile *mProfile; // I/O profile this output derives from 285 }; 286 287 // stream descriptor used for volume control 288 class StreamDescriptor 289 { 290 public: 291 StreamDescriptor(); 292 293 int getVolumeIndex(audio_devices_t device); 294 void dump(int fd); 295 296 int mIndexMin; // min volume index 297 int mIndexMax; // max volume index 298 KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device 299 bool mCanBeMuted; // true is the stream can be muted 300 301 const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT]; 302 }; 303 304 // stream descriptor used for volume control 305 class EffectDescriptor 306 { 307 public: 308 309 status_t dump(int fd); 310 311 int mIo; // io the effect is attached to 312 routing_strategy mStrategy; // routing strategy the effect is associated to 313 int mSession; // audio session the effect is on 314 effect_descriptor_t mDesc; // effect descriptor 315 bool mEnabled; // enabled state: CPU load being used or not 316 }; 317 318 void addOutput(audio_io_handle_t id, AudioOutputDescriptor *outputDesc); 319 320 // return the strategy corresponding to a given stream type 321 static routing_strategy getStrategy(AudioSystem::stream_type stream); 322 323 // return appropriate device for streams handled by the specified strategy according to current 324 // phone state, connected devices... 325 // if fromCache is true, the device is returned from mDeviceForStrategy[], 326 // otherwise it is determine by current state 327 // (device connected,phone state, force use, a2dp output...) 328 // This allows to: 329 // 1 speed up process when the state is stable (when starting or stopping an output) 330 // 2 access to either current device selection (fromCache == true) or 331 // "future" device selection (fromCache == false) when called from a context 332 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 333 // before updateDeviceForStrategy() is called. 334 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 335 bool fromCache); 336 337 // change the route of the specified output. Returns the number of ms we have slept to 338 // allow new routing to take effect in certain cases. 339 uint32_t setOutputDevice(audio_io_handle_t output, 340 audio_devices_t device, 341 bool force = false, 342 int delayMs = 0); 343 344 // select input device corresponding to requested audio source 345 virtual audio_devices_t getDeviceForInputSource(int inputSource); 346 347 // return io handle of active input or 0 if no input is active 348 audio_io_handle_t getActiveInput(); 349 350 // initialize volume curves for each strategy and device category 351 void initializeVolumeCurves(); 352 353 // compute the actual volume for a given stream according to the requested index and a particular 354 // device 355 virtual float computeVolume(int stream, int index, audio_io_handle_t output, audio_devices_t device); 356 357 // check that volume change is permitted, compute and send new volume to audio hardware 358 status_t checkAndSetVolume(int stream, int index, audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 359 360 // apply all stream volumes to the specified output and device 361 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 362 363 // Mute or unmute all streams handled by the specified strategy on the specified output 364 void setStrategyMute(routing_strategy strategy, 365 bool on, 366 audio_io_handle_t output, 367 int delayMs = 0, 368 audio_devices_t device = (audio_devices_t)0); 369 370 // Mute or unmute the stream on the specified output 371 void setStreamMute(int stream, 372 bool on, 373 audio_io_handle_t output, 374 int delayMs = 0, 375 audio_devices_t device = (audio_devices_t)0); 376 377 // handle special cases for sonification strategy while in call: mute streams or replace by 378 // a special tone in the device used for communication 379 void handleIncallSonification(int stream, bool starting, bool stateChange); 380 381 // true if device is in a telephony or VoIP call 382 virtual bool isInCall(); 383 384 // true if given state represents a device in a telephony or VoIP call 385 virtual bool isStateInCall(int state); 386 387 // when a device is connected, checks if an open output can be routed 388 // to this device. If none is open, tries to open one of the available outputs. 389 // Returns an output suitable to this device or 0. 390 // when a device is disconnected, checks if an output is not used any more and 391 // returns its handle if any. 392 // transfers the audio tracks and effects from one output thread to another accordingly. 393 status_t checkOutputsForDevice(audio_devices_t device, 394 AudioSystem::device_connection_state state, 395 SortedVector<audio_io_handle_t>& outputs); 396 397 // close an output and its companion duplicating output. 398 void closeOutput(audio_io_handle_t output); 399 400 // checks and if necessary changes outputs used for all strategies. 401 // must be called every time a condition that affects the output choice for a given strategy 402 // changes: connected device, phone state, force use... 403 // Must be called before updateDeviceForStrategy() 404 void checkOutputForStrategy(routing_strategy strategy); 405 406 // Same as checkOutputForStrategy() but for a all strategies in order of priority 407 void checkOutputForAllStrategies(); 408 409 // manages A2DP output suspend/restore according to phone state and BT SCO usage 410 void checkA2dpSuspend(); 411 412 // returns the A2DP output handle if it is open or 0 otherwise 413 audio_io_handle_t getA2dpOutput(); 414 415 // selects the most appropriate device on output for current state 416 // must be called every time a condition that affects the device choice for a given output is 417 // changed: connected device, phone state, force use, output start, output stop.. 418 // see getDeviceForStrategy() for the use of fromCache parameter 419 420 audio_devices_t getNewDevice(audio_io_handle_t output, bool fromCache); 421 // updates cache of device used by all strategies (mDeviceForStrategy[]) 422 // must be called every time a condition that affects the device choice for a given strategy is 423 // changed: connected device, phone state, force use... 424 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 425 // Must be called after checkOutputForAllStrategies() 426 427 void updateDeviceForStrategy(); 428 429 // true if current platform requires a specific output to be opened for this particular 430 // set of parameters. This function is called by getOutput() and is implemented by platform 431 // specific audio policy manager. 432 virtual bool needsDirectOuput(audio_stream_type_t stream, 433 uint32_t samplingRate, 434 audio_format_t format, 435 audio_channel_mask_t channelMask, 436 audio_output_flags_t flags, 437 audio_devices_t device); 438 439 virtual uint32_t getMaxEffectsCpuLoad(); 440 virtual uint32_t getMaxEffectsMemory(); 441 #ifdef AUDIO_POLICY_TEST 442 virtual bool threadLoop(); 443 void exit(); 444 int testOutputIndex(audio_io_handle_t output); 445 #endif //AUDIO_POLICY_TEST 446 447 status_t setEffectEnabled(EffectDescriptor *pDesc, bool enabled); 448 449 // returns the category the device belongs to with regard to volume curve management 450 static device_category getDeviceCategory(audio_devices_t device); 451 452 // extract one device relevant for volume control from multiple device selection 453 static audio_devices_t getDeviceForVolume(audio_devices_t device); 454 455 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device); 456 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 457 SortedVector<audio_io_handle_t>& outputs2); 458 459 // mute/unmute strategies using an incompatible device combination 460 // if muting, wait for the audio in pcm buffer to be drained before proceeding 461 // if unmuting, unmute only after the specified delay 462 // Returns the number of ms waited 463 uint32_t checkDeviceMuteStrategies(AudioOutputDescriptor *outputDesc, 464 audio_devices_t prevDevice, 465 uint32_t delayMs); 466 467 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 468 AudioSystem::output_flags flags); 469 IOProfile *getInputProfile(audio_devices_t device, 470 uint32_t samplingRate, 471 uint32_t format, 472 uint32_t channelMask); 473 IOProfile *getProfileForDirectOutput(audio_devices_t device, 474 uint32_t samplingRate, 475 uint32_t format, 476 uint32_t channelMask, 477 audio_output_flags_t flags); 478 // 479 // Audio policy configuration file parsing (audio_policy.conf) 480 // 481 static uint32_t stringToEnum(const struct StringToEnum *table, 482 size_t size, 483 const char *name); 484 static audio_output_flags_t parseFlagNames(char *name); 485 static audio_devices_t parseDeviceNames(char *name); 486 void loadSamplingRates(char *name, IOProfile *profile); 487 void loadFormats(char *name, IOProfile *profile); 488 void loadOutChannels(char *name, IOProfile *profile); 489 void loadInChannels(char *name, IOProfile *profile); 490 status_t loadOutput(cnode *root, HwModule *module); 491 status_t loadInput(cnode *root, HwModule *module); 492 void loadHwModule(cnode *root); 493 void loadHwModules(cnode *root); 494 void loadGlobalConfig(cnode *root); 495 status_t loadAudioPolicyConfig(const char *path); 496 void defaultAudioPolicyConfig(void); 497 498 499 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 500 audio_io_handle_t mPrimaryOutput; // primary output handle 501 DefaultKeyedVector<audio_io_handle_t, AudioOutputDescriptor *> mOutputs; // list of output descriptors 502 DefaultKeyedVector<audio_io_handle_t, AudioInputDescriptor *> mInputs; // list of input descriptors 503 audio_devices_t mAvailableOutputDevices; // bit field of all available output devices 504 audio_devices_t mAvailableInputDevices; // bit field of all available input devices 505 int mPhoneState; // current phone state 506 AudioSystem::forced_config mForceUse[AudioSystem::NUM_FORCE_USE]; // current forced use configuration 507 508 StreamDescriptor mStreams[AudioSystem::NUM_STREAM_TYPES]; // stream descriptors for volume control 509 String8 mA2dpDeviceAddress; // A2DP device MAC address 510 String8 mScoDeviceAddress; // SCO device MAC address 511 String8 mUsbCardAndDevice; // USB audio ALSA card and device numbers: 512 // card=<card_number>;device=<><device_number> 513 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 514 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 515 float mLastVoiceVolume; // last voice volume value sent to audio HAL 516 517 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 518 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 519 // Maximum memory allocated to audio effects in KB 520 static const uint32_t MAX_EFFECTS_MEMORY = 512; 521 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 522 uint32_t mTotalEffectsMemory; // current memory used by effects 523 KeyedVector<int, EffectDescriptor *> mEffects; // list of registered audio effects 524 bool mA2dpSuspended; // true if A2DP output is suspended 525 bool mHasA2dp; // true on platforms with support for bluetooth A2DP 526 bool mHasUsb; // true on platforms with support for USB audio 527 audio_devices_t mAttachedOutputDevices; // output devices always available on the platform 528 audio_devices_t mDefaultOutputDevice; // output device selected by default at boot time 529 // (must be in mAttachedOutputDevices) 530 531 Vector <HwModule *> mHwModules; 532 Vector <IOProfile *> mOutputProfiles; // output profiles loaded from audio_policy.conf 533 Vector <IOProfile *> mInputProfiles; // input profiles loaded from audio_policy.conf 534 535 #ifdef AUDIO_POLICY_TEST 536 Mutex mLock; 537 Condition mWaitWorkCV; 538 539 int mCurOutput; 540 bool mDirectOutput; 541 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 542 int mTestInput; 543 uint32_t mTestDevice; 544 uint32_t mTestSamplingRate; 545 uint32_t mTestFormat; 546 uint32_t mTestChannels; 547 uint32_t mTestLatencyMs; 548 #endif //AUDIO_POLICY_TEST 549 550 private: 551 static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, 552 int indexInUi); 553 // updates device caching and output for streams that can influence the 554 // routing of notifications 555 void handleNotificationRoutingForStream(AudioSystem::stream_type stream); 556 }; 557 558 }; 559
