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 #pragma once 18 19 #include <stdint.h> 20 #include <sys/types.h> 21 #include <cutils/config_utils.h> 22 #include <cutils/misc.h> 23 #include <utils/Timers.h> 24 #include <utils/Errors.h> 25 #include <utils/KeyedVector.h> 26 #include <utils/SortedVector.h> 27 #include <media/AudioPolicy.h> 28 #include "AudioPolicyInterface.h" 29 30 #include <AudioPolicyManagerInterface.h> 31 #include <AudioPolicyManagerObserver.h> 32 #include <AudioGain.h> 33 #include <AudioPort.h> 34 #include <AudioPatch.h> 35 #include <ConfigParsingUtils.h> 36 #include <DeviceDescriptor.h> 37 #include <IOProfile.h> 38 #include <HwModule.h> 39 #include <AudioInputDescriptor.h> 40 #include <AudioOutputDescriptor.h> 41 #include <AudioPolicyMix.h> 42 #include <EffectDescriptor.h> 43 #include <SoundTriggerSession.h> 44 #include <StreamDescriptor.h> 45 #include <SessionRoute.h> 46 47 namespace android { 48 49 // ---------------------------------------------------------------------------- 50 51 // Attenuation applied to STRATEGY_SONIFICATION streams when a headset is connected: 6dB 52 #define SONIFICATION_HEADSET_VOLUME_FACTOR 0.5 53 #define SONIFICATION_HEADSET_VOLUME_FACTOR_DB (-6) 54 // Min volume for STRATEGY_SONIFICATION streams when limited by music volume: -36dB 55 #define SONIFICATION_HEADSET_VOLUME_MIN 0.016 56 #define SONIFICATION_HEADSET_VOLUME_MIN_DB (-36) 57 58 // Time in milliseconds during which we consider that music is still active after a music 59 // track was stopped - see computeVolume() 60 #define SONIFICATION_HEADSET_MUSIC_DELAY 5000 61 62 // Time in milliseconds during witch some streams are muted while the audio path 63 // is switched 64 #define MUTE_TIME_MS 2000 65 66 #define NUM_TEST_OUTPUTS 5 67 68 #define NUM_VOL_CURVE_KNEES 2 69 70 // Default minimum length allowed for offloading a compressed track 71 // Can be overridden by the audio.offload.min.duration.secs property 72 #define OFFLOAD_DEFAULT_MIN_DURATION_SECS 60 73 74 // ---------------------------------------------------------------------------- 75 // AudioPolicyManager implements audio policy manager behavior common to all platforms. 76 // ---------------------------------------------------------------------------- 77 78 class AudioPolicyManager : public AudioPolicyInterface, public AudioPolicyManagerObserver 79 80 #ifdef AUDIO_POLICY_TEST 81 , public Thread 82 #endif //AUDIO_POLICY_TEST 83 { 84 85 public: 86 AudioPolicyManager(AudioPolicyClientInterface *clientInterface); 87 virtual ~AudioPolicyManager(); 88 89 // AudioPolicyInterface 90 virtual status_t setDeviceConnectionState(audio_devices_t device, 91 audio_policy_dev_state_t state, 92 const char *device_address, 93 const char *device_name); 94 virtual audio_policy_dev_state_t getDeviceConnectionState(audio_devices_t device, 95 const char *device_address); 96 virtual void setPhoneState(audio_mode_t state); 97 virtual void setForceUse(audio_policy_force_use_t usage, 98 audio_policy_forced_cfg_t config); 99 virtual audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage); 100 101 virtual void setSystemProperty(const char* property, const char* value); 102 virtual status_t initCheck(); 103 virtual audio_io_handle_t getOutput(audio_stream_type_t stream, 104 uint32_t samplingRate, 105 audio_format_t format, 106 audio_channel_mask_t channelMask, 107 audio_output_flags_t flags, 108 const audio_offload_info_t *offloadInfo); 109 virtual status_t getOutputForAttr(const audio_attributes_t *attr, 110 audio_io_handle_t *output, 111 audio_session_t session, 112 audio_stream_type_t *stream, 113 uid_t uid, 114 uint32_t samplingRate, 115 audio_format_t format, 116 audio_channel_mask_t channelMask, 117 audio_output_flags_t flags, 118 audio_port_handle_t selectedDeviceId, 119 const audio_offload_info_t *offloadInfo); 120 virtual status_t startOutput(audio_io_handle_t output, 121 audio_stream_type_t stream, 122 audio_session_t session); 123 virtual status_t stopOutput(audio_io_handle_t output, 124 audio_stream_type_t stream, 125 audio_session_t session); 126 virtual void releaseOutput(audio_io_handle_t output, 127 audio_stream_type_t stream, 128 audio_session_t session); 129 virtual status_t getInputForAttr(const audio_attributes_t *attr, 130 audio_io_handle_t *input, 131 audio_session_t session, 132 uid_t uid, 133 uint32_t samplingRate, 134 audio_format_t format, 135 audio_channel_mask_t channelMask, 136 audio_input_flags_t flags, 137 audio_port_handle_t selectedDeviceId, 138 input_type_t *inputType); 139 140 // indicates to the audio policy manager that the input starts being used. 141 virtual status_t startInput(audio_io_handle_t input, 142 audio_session_t session); 143 144 // indicates to the audio policy manager that the input stops being used. 145 virtual status_t stopInput(audio_io_handle_t input, 146 audio_session_t session); 147 virtual void releaseInput(audio_io_handle_t input, 148 audio_session_t session); 149 virtual void closeAllInputs(); 150 virtual void initStreamVolume(audio_stream_type_t stream, 151 int indexMin, 152 int indexMax); 153 virtual status_t setStreamVolumeIndex(audio_stream_type_t stream, 154 int index, 155 audio_devices_t device); 156 virtual status_t getStreamVolumeIndex(audio_stream_type_t stream, 157 int *index, 158 audio_devices_t device); 159 160 // return the strategy corresponding to a given stream type 161 virtual uint32_t getStrategyForStream(audio_stream_type_t stream); 162 // return the strategy corresponding to the given audio attributes 163 virtual uint32_t getStrategyForAttr(const audio_attributes_t *attr); 164 165 // return the enabled output devices for the given stream type 166 virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream); 167 168 virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc = NULL); 169 virtual status_t registerEffect(const effect_descriptor_t *desc, 170 audio_io_handle_t io, 171 uint32_t strategy, 172 int session, 173 int id); unregisterEffect(int id)174 virtual status_t unregisterEffect(int id) 175 { 176 return mEffects.unregisterEffect(id); 177 } setEffectEnabled(int id,bool enabled)178 virtual status_t setEffectEnabled(int id, bool enabled) 179 { 180 return mEffects.setEffectEnabled(id, enabled); 181 } 182 183 virtual bool isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 184 // return whether a stream is playing remotely, override to change the definition of 185 // local/remote playback, used for instance by notification manager to not make 186 // media players lose audio focus when not playing locally 187 // For the base implementation, "remotely" means playing during screen mirroring which 188 // uses an output for playback with a non-empty, non "0" address. 189 virtual bool isStreamActiveRemotely(audio_stream_type_t stream, 190 uint32_t inPastMs = 0) const; 191 192 virtual bool isSourceActive(audio_source_t source) const; 193 194 virtual status_t dump(int fd); 195 196 virtual bool isOffloadSupported(const audio_offload_info_t& offloadInfo); 197 198 virtual status_t listAudioPorts(audio_port_role_t role, 199 audio_port_type_t type, 200 unsigned int *num_ports, 201 struct audio_port *ports, 202 unsigned int *generation); 203 virtual status_t getAudioPort(struct audio_port *port); 204 virtual status_t createAudioPatch(const struct audio_patch *patch, 205 audio_patch_handle_t *handle, 206 uid_t uid); 207 virtual status_t releaseAudioPatch(audio_patch_handle_t handle, 208 uid_t uid); 209 virtual status_t listAudioPatches(unsigned int *num_patches, 210 struct audio_patch *patches, 211 unsigned int *generation); 212 virtual status_t setAudioPortConfig(const struct audio_port_config *config); 213 214 virtual status_t acquireSoundTriggerSession(audio_session_t *session, 215 audio_io_handle_t *ioHandle, 216 audio_devices_t *device); 217 releaseSoundTriggerSession(audio_session_t session)218 virtual status_t releaseSoundTriggerSession(audio_session_t session) 219 { 220 return mSoundTriggerSessions.releaseSession(session); 221 } 222 223 virtual status_t registerPolicyMixes(Vector<AudioMix> mixes); 224 virtual status_t unregisterPolicyMixes(Vector<AudioMix> mixes); 225 226 virtual status_t startAudioSource(const struct audio_port_config *source, 227 const audio_attributes_t *attributes, 228 audio_io_handle_t *handle); 229 virtual status_t stopAudioSource(audio_io_handle_t handle); 230 231 virtual void releaseResourcesForUid(uid_t uid); 232 233 // Audio policy configuration file parsing (audio_policy.conf) 234 // TODO candidates to be moved to ConfigParsingUtils 235 void defaultAudioPolicyConfig(void); 236 237 // return the strategy corresponding to a given stream type 238 routing_strategy getStrategy(audio_stream_type_t stream) const; 239 240 protected: 241 // From AudioPolicyManagerObserver getAudioPatches()242 virtual const AudioPatchCollection &getAudioPatches() const 243 { 244 return mAudioPatches; 245 } getSoundTriggerSessionCollection()246 virtual const SoundTriggerSessionCollection &getSoundTriggerSessionCollection() const 247 { 248 return mSoundTriggerSessions; 249 } getAudioPolicyMixCollection()250 virtual const AudioPolicyMixCollection &getAudioPolicyMixCollection() const 251 { 252 return mPolicyMixes; 253 } getOutputs()254 virtual const SwAudioOutputCollection &getOutputs() const 255 { 256 return mOutputs; 257 } getInputs()258 virtual const AudioInputCollection &getInputs() const 259 { 260 return mInputs; 261 } getAvailableOutputDevices()262 virtual const DeviceVector &getAvailableOutputDevices() const 263 { 264 return mAvailableOutputDevices; 265 } getAvailableInputDevices()266 virtual const DeviceVector &getAvailableInputDevices() const 267 { 268 return mAvailableInputDevices; 269 } getStreamDescriptors()270 virtual StreamDescriptorCollection &getStreamDescriptors() 271 { 272 return mStreams; 273 } getDefaultOutputDevice()274 virtual const sp<DeviceDescriptor> &getDefaultOutputDevice() const 275 { 276 return mDefaultOutputDevice; 277 } 278 protected: 279 void addOutput(audio_io_handle_t output, sp<SwAudioOutputDescriptor> outputDesc); 280 void removeOutput(audio_io_handle_t output); 281 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 282 283 // return appropriate device for streams handled by the specified strategy according to current 284 // phone state, connected devices... 285 // if fromCache is true, the device is returned from mDeviceForStrategy[], 286 // otherwise it is determine by current state 287 // (device connected,phone state, force use, a2dp output...) 288 // This allows to: 289 // 1 speed up process when the state is stable (when starting or stopping an output) 290 // 2 access to either current device selection (fromCache == true) or 291 // "future" device selection (fromCache == false) when called from a context 292 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 293 // before updateDevicesAndOutputs() is called. 294 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 295 bool fromCache); 296 297 bool isStrategyActive(const sp<AudioOutputDescriptor> outputDesc, routing_strategy strategy, 298 uint32_t inPastMs = 0, nsecs_t sysTime = 0) const; 299 300 // change the route of the specified output. Returns the number of ms we have slept to 301 // allow new routing to take effect in certain cases. 302 virtual uint32_t setOutputDevice(const sp<AudioOutputDescriptor>& outputDesc, 303 audio_devices_t device, 304 bool force = false, 305 int delayMs = 0, 306 audio_patch_handle_t *patchHandle = NULL, 307 const char* address = NULL); 308 status_t resetOutputDevice(const sp<AudioOutputDescriptor>& outputDesc, 309 int delayMs = 0, 310 audio_patch_handle_t *patchHandle = NULL); 311 status_t setInputDevice(audio_io_handle_t input, 312 audio_devices_t device, 313 bool force = false, 314 audio_patch_handle_t *patchHandle = NULL); 315 status_t resetInputDevice(audio_io_handle_t input, 316 audio_patch_handle_t *patchHandle = NULL); 317 318 // select input device corresponding to requested audio source 319 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 320 321 // compute the actual volume for a given stream according to the requested index and a particular 322 // device 323 virtual float computeVolume(audio_stream_type_t stream, 324 int index, 325 audio_devices_t device); 326 327 // check that volume change is permitted, compute and send new volume to audio hardware 328 virtual status_t checkAndSetVolume(audio_stream_type_t stream, int index, 329 const sp<AudioOutputDescriptor>& outputDesc, 330 audio_devices_t device, 331 int delayMs = 0, bool force = false); 332 333 // apply all stream volumes to the specified output and device 334 void applyStreamVolumes(const sp<AudioOutputDescriptor>& outputDesc, 335 audio_devices_t device, int delayMs = 0, bool force = false); 336 337 // Mute or unmute all streams handled by the specified strategy on the specified output 338 void setStrategyMute(routing_strategy strategy, 339 bool on, 340 const sp<AudioOutputDescriptor>& outputDesc, 341 int delayMs = 0, 342 audio_devices_t device = (audio_devices_t)0); 343 344 // Mute or unmute the stream on the specified output 345 void setStreamMute(audio_stream_type_t stream, 346 bool on, 347 const sp<AudioOutputDescriptor>& outputDesc, 348 int delayMs = 0, 349 audio_devices_t device = (audio_devices_t)0); 350 351 // handle special cases for sonification strategy while in call: mute streams or replace by 352 // a special tone in the device used for communication 353 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 354 355 audio_mode_t getPhoneState(); 356 357 // true if device is in a telephony or VoIP call 358 virtual bool isInCall(); 359 // true if given state represents a device in a telephony or VoIP call 360 virtual bool isStateInCall(int state); 361 362 // when a device is connected, checks if an open output can be routed 363 // to this device. If none is open, tries to open one of the available outputs. 364 // Returns an output suitable to this device or 0. 365 // when a device is disconnected, checks if an output is not used any more and 366 // returns its handle if any. 367 // transfers the audio tracks and effects from one output thread to another accordingly. 368 status_t checkOutputsForDevice(const sp<DeviceDescriptor> devDesc, 369 audio_policy_dev_state_t state, 370 SortedVector<audio_io_handle_t>& outputs, 371 const String8 address); 372 373 status_t checkInputsForDevice(const sp<DeviceDescriptor> devDesc, 374 audio_policy_dev_state_t state, 375 SortedVector<audio_io_handle_t>& inputs, 376 const String8 address); 377 378 // close an output and its companion duplicating output. 379 void closeOutput(audio_io_handle_t output); 380 381 // close an input. 382 void closeInput(audio_io_handle_t input); 383 384 // checks and if necessary changes outputs used for all strategies. 385 // must be called every time a condition that affects the output choice for a given strategy 386 // changes: connected device, phone state, force use... 387 // Must be called before updateDevicesAndOutputs() 388 void checkOutputForStrategy(routing_strategy strategy); 389 390 // Same as checkOutputForStrategy() but for a all strategies in order of priority 391 void checkOutputForAllStrategies(); 392 393 // manages A2DP output suspend/restore according to phone state and BT SCO usage 394 void checkA2dpSuspend(); 395 396 // selects the most appropriate device on output for current state 397 // must be called every time a condition that affects the device choice for a given output is 398 // changed: connected device, phone state, force use, output start, output stop.. 399 // see getDeviceForStrategy() for the use of fromCache parameter 400 audio_devices_t getNewOutputDevice(const sp<AudioOutputDescriptor>& outputDesc, 401 bool fromCache); 402 403 // updates cache of device used by all strategies (mDeviceForStrategy[]) 404 // must be called every time a condition that affects the device choice for a given strategy is 405 // changed: connected device, phone state, force use... 406 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 407 // Must be called after checkOutputForAllStrategies() 408 void updateDevicesAndOutputs(); 409 410 // selects the most appropriate device on input for current state 411 audio_devices_t getNewInputDevice(audio_io_handle_t input); 412 getMaxEffectsCpuLoad()413 virtual uint32_t getMaxEffectsCpuLoad() 414 { 415 return mEffects.getMaxEffectsCpuLoad(); 416 } 417 getMaxEffectsMemory()418 virtual uint32_t getMaxEffectsMemory() 419 { 420 return mEffects.getMaxEffectsMemory(); 421 } 422 #ifdef AUDIO_POLICY_TEST 423 virtual bool threadLoop(); 424 void exit(); 425 int testOutputIndex(audio_io_handle_t output); 426 #endif //AUDIO_POLICY_TEST 427 428 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 429 SwAudioOutputCollection openOutputs); 430 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 431 SortedVector<audio_io_handle_t>& outputs2); 432 433 // mute/unmute strategies using an incompatible device combination 434 // if muting, wait for the audio in pcm buffer to be drained before proceeding 435 // if unmuting, unmute only after the specified delay 436 // Returns the number of ms waited 437 virtual uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 438 audio_devices_t prevDevice, 439 uint32_t delayMs); 440 441 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 442 audio_output_flags_t flags, 443 audio_format_t format); 444 // samplingRate, format, channelMask are in/out and so may be modified 445 sp<IOProfile> getInputProfile(audio_devices_t device, 446 String8 address, 447 uint32_t& samplingRate, 448 audio_format_t& format, 449 audio_channel_mask_t& channelMask, 450 audio_input_flags_t flags); 451 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 452 uint32_t samplingRate, 453 audio_format_t format, 454 audio_channel_mask_t channelMask, 455 audio_output_flags_t flags); 456 457 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 458 addAudioPatch(audio_patch_handle_t handle,const sp<AudioPatch> & patch)459 virtual status_t addAudioPatch(audio_patch_handle_t handle, const sp<AudioPatch>& patch) 460 { 461 return mAudioPatches.addAudioPatch(handle, patch); 462 } removeAudioPatch(audio_patch_handle_t handle)463 virtual status_t removeAudioPatch(audio_patch_handle_t handle) 464 { 465 return mAudioPatches.removeAudioPatch(handle); 466 } 467 availablePrimaryOutputDevices()468 audio_devices_t availablePrimaryOutputDevices() const 469 { 470 if (!hasPrimaryOutput()) { 471 return AUDIO_DEVICE_NONE; 472 } 473 return mPrimaryOutput->supportedDevices() & mAvailableOutputDevices.types(); 474 } availablePrimaryInputDevices()475 audio_devices_t availablePrimaryInputDevices() const 476 { 477 if (!hasPrimaryOutput()) { 478 return AUDIO_DEVICE_NONE; 479 } 480 return mAvailableInputDevices.getDevicesFromHwModule(mPrimaryOutput->getModuleHandle()); 481 } 482 483 void updateCallRouting(audio_devices_t rxDevice, int delayMs = 0); 484 485 // if argument "device" is different from AUDIO_DEVICE_NONE, startSource() will force 486 // the re-evaluation of the output device. 487 status_t startSource(sp<AudioOutputDescriptor> outputDesc, 488 audio_stream_type_t stream, 489 audio_devices_t device, 490 uint32_t *delayMs); 491 status_t stopSource(sp<AudioOutputDescriptor> outputDesc, 492 audio_stream_type_t stream, 493 bool forceDeviceUpdate); 494 495 void clearAudioPatches(uid_t uid); 496 void clearSessionRoutes(uid_t uid); 497 void checkStrategyRoute(routing_strategy strategy, audio_io_handle_t ouptutToSkip); 498 hasPrimaryOutput()499 status_t hasPrimaryOutput() const { return mPrimaryOutput != 0; } 500 501 uid_t mUidCached; 502 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 503 sp<SwAudioOutputDescriptor> mPrimaryOutput; // primary output descriptor 504 // list of descriptors for outputs currently opened 505 506 SwAudioOutputCollection mOutputs; 507 // copy of mOutputs before setDeviceConnectionState() opens new outputs 508 // reset to mOutputs when updateDevicesAndOutputs() is called. 509 SwAudioOutputCollection mPreviousOutputs; 510 AudioInputCollection mInputs; // list of input descriptors 511 512 DeviceVector mAvailableOutputDevices; // all available output devices 513 DeviceVector mAvailableInputDevices; // all available input devices 514 515 SessionRouteMap mOutputRoutes = SessionRouteMap(SessionRouteMap::MAPTYPE_OUTPUT); 516 SessionRouteMap mInputRoutes = SessionRouteMap(SessionRouteMap::MAPTYPE_INPUT); 517 518 StreamDescriptorCollection mStreams; // stream descriptors for volume control 519 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 520 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 521 float mLastVoiceVolume; // last voice volume value sent to audio HAL 522 523 EffectDescriptorCollection mEffects; // list of registered audio effects 524 bool mA2dpSuspended; // true if A2DP output is suspended 525 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 526 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 527 // to boost soft sounds, used to adjust volume curves accordingly 528 529 HwModuleCollection mHwModules; 530 531 volatile int32_t mAudioPortGeneration; 532 533 AudioPatchCollection mAudioPatches; 534 535 SoundTriggerSessionCollection mSoundTriggerSessions; 536 537 sp<AudioPatch> mCallTxPatch; 538 sp<AudioPatch> mCallRxPatch; 539 540 // for supporting "beacon" streams, i.e. streams that only play on speaker, and never 541 // when something other than STREAM_TTS (a.k.a. "Transmitted Through Speaker") is playing 542 enum { 543 STARTING_OUTPUT, 544 STARTING_BEACON, 545 STOPPING_OUTPUT, 546 STOPPING_BEACON 547 }; 548 uint32_t mBeaconMuteRefCount; // ref count for stream that would mute beacon 549 uint32_t mBeaconPlayingRefCount;// ref count for the playing beacon streams 550 bool mBeaconMuted; // has STREAM_TTS been muted 551 bool mTtsOutputAvailable; // true if a dedicated output for TTS stream is available 552 553 AudioPolicyMixCollection mPolicyMixes; // list of registered mixes 554 555 #ifdef AUDIO_POLICY_TEST 556 Mutex mLock; 557 Condition mWaitWorkCV; 558 559 int mCurOutput; 560 bool mDirectOutput; 561 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 562 int mTestInput; 563 uint32_t mTestDevice; 564 uint32_t mTestSamplingRate; 565 uint32_t mTestFormat; 566 uint32_t mTestChannels; 567 uint32_t mTestLatencyMs; 568 #endif //AUDIO_POLICY_TEST 569 570 uint32_t nextAudioPortGeneration(); 571 572 // Audio Policy Engine Interface. 573 AudioPolicyManagerInterface *mEngine; 574 private: 575 // updates device caching and output for streams that can influence the 576 // routing of notifications 577 void handleNotificationRoutingForStream(audio_stream_type_t stream); 578 // find the outputs on a given output descriptor that have the given address. 579 // to be called on an AudioOutputDescriptor whose supported devices (as defined 580 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 581 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 582 // where addresses are used to distinguish between one connected device and another. 583 void findIoHandlesByAddress(sp<SwAudioOutputDescriptor> desc /*in*/, 584 const audio_devices_t device /*in*/, 585 const String8 address /*in*/, 586 SortedVector<audio_io_handle_t>& outputs /*out*/); curAudioPortGeneration()587 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 588 // internal method to return the output handle for the given device and format 589 audio_io_handle_t getOutputForDevice( 590 audio_devices_t device, 591 audio_session_t session, 592 audio_stream_type_t stream, 593 uint32_t samplingRate, 594 audio_format_t format, 595 audio_channel_mask_t channelMask, 596 audio_output_flags_t flags, 597 const audio_offload_info_t *offloadInfo); 598 // internal function to derive a stream type value from audio attributes 599 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 600 // event is one of STARTING_OUTPUT, STARTING_BEACON, STOPPING_OUTPUT, STOPPING_BEACON 601 // returns 0 if no mute/unmute event happened, the largest latency of the device where 602 // the mute/unmute happened 603 uint32_t handleEventForBeacon(int event); 604 uint32_t setBeaconMute(bool mute); 605 bool isValidAttributes(const audio_attributes_t *paa); 606 607 // select input device corresponding to requested audio source and return associated policy 608 // mix if any. Calls getDeviceForInputSource(). 609 audio_devices_t getDeviceAndMixForInputSource(audio_source_t inputSource, 610 AudioMix **policyMix = NULL); 611 612 // Called by setDeviceConnectionState(). 613 status_t setDeviceConnectionStateInt(audio_devices_t device, 614 audio_policy_dev_state_t state, 615 const char *device_address, 616 const char *device_name); 617 }; 618 619 }; 620