AudioPolicyManager.h revision aa9811945f575614b3482d09e4d969792701cebb
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 46namespace android { 47 48// ---------------------------------------------------------------------------- 49 50// Attenuation applied to STRATEGY_SONIFICATION streams when a headset is connected: 6dB 51#define SONIFICATION_HEADSET_VOLUME_FACTOR 0.5 52// Min volume for STRATEGY_SONIFICATION streams when limited by music volume: -36dB 53#define SONIFICATION_HEADSET_VOLUME_MIN 0.016 54// Time in milliseconds during which we consider that music is still active after a music 55// track was stopped - see computeVolume() 56#define SONIFICATION_HEADSET_MUSIC_DELAY 5000 57 58// Time in milliseconds during witch some streams are muted while the audio path 59// is switched 60#define MUTE_TIME_MS 2000 61 62#define NUM_TEST_OUTPUTS 5 63 64#define NUM_VOL_CURVE_KNEES 2 65 66// Default minimum length allowed for offloading a compressed track 67// Can be overridden by the audio.offload.min.duration.secs property 68#define OFFLOAD_DEFAULT_MIN_DURATION_SECS 60 69 70// ---------------------------------------------------------------------------- 71// AudioPolicyManager implements audio policy manager behavior common to all platforms. 72// ---------------------------------------------------------------------------- 73 74class AudioPolicyManager : public AudioPolicyInterface, public AudioPolicyManagerObserver 75 76#ifdef AUDIO_POLICY_TEST 77 , public Thread 78#endif //AUDIO_POLICY_TEST 79{ 80 81public: 82 AudioPolicyManager(AudioPolicyClientInterface *clientInterface); 83 virtual ~AudioPolicyManager(); 84 85 // AudioPolicyInterface 86 virtual status_t setDeviceConnectionState(audio_devices_t device, 87 audio_policy_dev_state_t state, 88 const char *device_address, 89 const char *device_name); 90 virtual audio_policy_dev_state_t getDeviceConnectionState(audio_devices_t device, 91 const char *device_address); 92 virtual void setPhoneState(audio_mode_t state); 93 virtual void setForceUse(audio_policy_force_use_t usage, 94 audio_policy_forced_cfg_t config); 95 virtual audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage); 96 97 virtual void setSystemProperty(const char* property, const char* value); 98 virtual status_t initCheck(); 99 virtual audio_io_handle_t getOutput(audio_stream_type_t stream, 100 uint32_t samplingRate, 101 audio_format_t format, 102 audio_channel_mask_t channelMask, 103 audio_output_flags_t flags, 104 const audio_offload_info_t *offloadInfo); 105 virtual status_t getOutputForAttr(const audio_attributes_t *attr, 106 audio_io_handle_t *output, 107 audio_session_t session, 108 audio_stream_type_t *stream, 109 uint32_t samplingRate, 110 audio_format_t format, 111 audio_channel_mask_t channelMask, 112 audio_output_flags_t flags, 113 audio_port_handle_t selectedDeviceId, 114 const audio_offload_info_t *offloadInfo); 115 virtual status_t startOutput(audio_io_handle_t output, 116 audio_stream_type_t stream, 117 audio_session_t session); 118 virtual status_t stopOutput(audio_io_handle_t output, 119 audio_stream_type_t stream, 120 audio_session_t session); 121 virtual void releaseOutput(audio_io_handle_t output, 122 audio_stream_type_t stream, 123 audio_session_t session); 124 virtual status_t getInputForAttr(const audio_attributes_t *attr, 125 audio_io_handle_t *input, 126 audio_session_t session, 127 uint32_t samplingRate, 128 audio_format_t format, 129 audio_channel_mask_t channelMask, 130 audio_input_flags_t flags, 131 input_type_t *inputType); 132 133 // indicates to the audio policy manager that the input starts being used. 134 virtual status_t startInput(audio_io_handle_t input, 135 audio_session_t session); 136 137 // indicates to the audio policy manager that the input stops being used. 138 virtual status_t stopInput(audio_io_handle_t input, 139 audio_session_t session); 140 virtual void releaseInput(audio_io_handle_t input, 141 audio_session_t session); 142 virtual void closeAllInputs(); 143 virtual void initStreamVolume(audio_stream_type_t stream, 144 int indexMin, 145 int indexMax); 146 virtual status_t setStreamVolumeIndex(audio_stream_type_t stream, 147 int index, 148 audio_devices_t device); 149 virtual status_t getStreamVolumeIndex(audio_stream_type_t stream, 150 int *index, 151 audio_devices_t device); 152 153 // return the strategy corresponding to a given stream type 154 virtual uint32_t getStrategyForStream(audio_stream_type_t stream); 155 // return the strategy corresponding to the given audio attributes 156 virtual uint32_t getStrategyForAttr(const audio_attributes_t *attr); 157 158 // return the enabled output devices for the given stream type 159 virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream); 160 161 virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc = NULL); 162 virtual status_t registerEffect(const effect_descriptor_t *desc, 163 audio_io_handle_t io, 164 uint32_t strategy, 165 int session, 166 int id); 167 virtual status_t unregisterEffect(int id) 168 { 169 return mEffects.unregisterEffect(id); 170 } 171 virtual status_t setEffectEnabled(int id, bool enabled) 172 { 173 return mEffects.setEffectEnabled(id, enabled); 174 } 175 176 virtual bool isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const 177 { 178 return mOutputs.isStreamActive(stream, inPastMs); 179 } 180 // return whether a stream is playing remotely, override to change the definition of 181 // local/remote playback, used for instance by notification manager to not make 182 // media players lose audio focus when not playing locally 183 // For the base implementation, "remotely" means playing during screen mirroring which 184 // uses an output for playback with a non-empty, non "0" address. 185 virtual bool isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs = 0) const 186 { 187 return mOutputs.isStreamActiveRemotely(stream, inPastMs); 188 } 189 virtual bool isSourceActive(audio_source_t source) const; 190 191 virtual status_t dump(int fd); 192 193 virtual bool isOffloadSupported(const audio_offload_info_t& offloadInfo); 194 195 virtual status_t listAudioPorts(audio_port_role_t role, 196 audio_port_type_t type, 197 unsigned int *num_ports, 198 struct audio_port *ports, 199 unsigned int *generation); 200 virtual status_t getAudioPort(struct audio_port *port); 201 virtual status_t createAudioPatch(const struct audio_patch *patch, 202 audio_patch_handle_t *handle, 203 uid_t uid); 204 virtual status_t releaseAudioPatch(audio_patch_handle_t handle, 205 uid_t uid); 206 virtual status_t listAudioPatches(unsigned int *num_patches, 207 struct audio_patch *patches, 208 unsigned int *generation); 209 virtual status_t setAudioPortConfig(const struct audio_port_config *config); 210 virtual void clearAudioPatches(uid_t uid); 211 212 virtual status_t acquireSoundTriggerSession(audio_session_t *session, 213 audio_io_handle_t *ioHandle, 214 audio_devices_t *device); 215 216 virtual status_t releaseSoundTriggerSession(audio_session_t session) 217 { 218 return mSoundTriggerSessions.releaseSession(session); 219 } 220 221 virtual status_t registerPolicyMixes(Vector<AudioMix> mixes); 222 virtual status_t unregisterPolicyMixes(Vector<AudioMix> mixes); 223 224 // Audio policy configuration file parsing (audio_policy.conf) 225 // TODO candidates to be moved to ConfigParsingUtils 226 void defaultAudioPolicyConfig(void); 227 228 // return the strategy corresponding to a given stream type 229 routing_strategy getStrategy(audio_stream_type_t stream) const; 230 231protected: 232 class SessionRoute : public RefBase 233 { 234 public: 235 friend class SessionRouteMap; 236 SessionRoute(audio_session_t session, 237 audio_stream_type_t streamType, 238 sp<DeviceDescriptor> deviceDescriptor) 239 : mSession(session), 240 mStreamType(streamType), 241 mDeviceDescriptor(deviceDescriptor), 242 mRefCount(0), 243 mActivityCount(0) {} 244 245 audio_session_t mSession; 246 audio_stream_type_t mStreamType; 247 248 sp<DeviceDescriptor> mDeviceDescriptor; 249 250 // "reference" counting 251 int mRefCount; // +/- on references 252 int mActivityCount; // +/- on start/stop 253 254 void log(const char* prefix); 255 }; 256 257 class SessionRouteMap: public KeyedVector<audio_session_t, sp<SessionRoute>> 258 { 259 public: 260 bool hasRoute(audio_session_t session); 261 void addRoute(audio_session_t session, audio_stream_type_t streamType, 262 sp<DeviceDescriptor> deviceDescriptor); 263 void removeRoute(audio_session_t session); 264 265 int incRouteActivity(audio_session_t session); 266 int decRouteActivity(audio_session_t session); 267 268 void log(const char* caption); 269 }; 270 271 // From AudioPolicyManagerObserver 272 virtual const AudioPatchCollection &getAudioPatches() const 273 { 274 return mAudioPatches; 275 } 276 virtual const SoundTriggerSessionCollection &getSoundTriggerSessionCollection() const 277 { 278 return mSoundTriggerSessions; 279 } 280 virtual const AudioPolicyMixCollection &getAudioPolicyMixCollection() const 281 { 282 return mPolicyMixes; 283 } 284 virtual const AudioOutputCollection &getOutputs() const 285 { 286 return mOutputs; 287 } 288 virtual const AudioInputCollection &getInputs() const 289 { 290 return mInputs; 291 } 292 virtual const DeviceVector &getAvailableOutputDevices() const 293 { 294 return mAvailableOutputDevices; 295 } 296 virtual const DeviceVector &getAvailableInputDevices() const 297 { 298 return mAvailableInputDevices; 299 } 300 virtual StreamDescriptorCollection &getStreamDescriptors() 301 { 302 return mStreams; 303 } 304 virtual const sp<DeviceDescriptor> &getDefaultOutputDevice() const 305 { 306 return mDefaultOutputDevice; 307 } 308protected: 309 void addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc); 310 void removeOutput(audio_io_handle_t output); 311 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 312 313 // return appropriate device for streams handled by the specified strategy according to current 314 // phone state, connected devices... 315 // if fromCache is true, the device is returned from mDeviceForStrategy[], 316 // otherwise it is determine by current state 317 // (device connected,phone state, force use, a2dp output...) 318 // This allows to: 319 // 1 speed up process when the state is stable (when starting or stopping an output) 320 // 2 access to either current device selection (fromCache == true) or 321 // "future" device selection (fromCache == false) when called from a context 322 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 323 // before updateDevicesAndOutputs() is called. 324 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 325 bool fromCache); 326 327 bool isStrategyActive(const sp<AudioOutputDescriptor> outputDesc, routing_strategy strategy, 328 uint32_t inPastMs = 0, nsecs_t sysTime = 0) const; 329 330 // change the route of the specified output. Returns the number of ms we have slept to 331 // allow new routing to take effect in certain cases. 332 virtual uint32_t setOutputDevice(audio_io_handle_t output, 333 audio_devices_t device, 334 bool force = false, 335 int delayMs = 0, 336 audio_patch_handle_t *patchHandle = NULL, 337 const char* address = NULL); 338 status_t resetOutputDevice(audio_io_handle_t output, 339 int delayMs = 0, 340 audio_patch_handle_t *patchHandle = NULL); 341 status_t setInputDevice(audio_io_handle_t input, 342 audio_devices_t device, 343 bool force = false, 344 audio_patch_handle_t *patchHandle = NULL); 345 status_t resetInputDevice(audio_io_handle_t input, 346 audio_patch_handle_t *patchHandle = NULL); 347 348 // select input device corresponding to requested audio source 349 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 350 351 // compute the actual volume for a given stream according to the requested index and a particular 352 // device 353 virtual float computeVolume(audio_stream_type_t stream, int index, 354 audio_io_handle_t output, audio_devices_t device); 355 356 // check that volume change is permitted, compute and send new volume to audio hardware 357 virtual status_t checkAndSetVolume(audio_stream_type_t stream, int index, 358 audio_io_handle_t output, 359 audio_devices_t device, 360 int delayMs = 0, bool force = false); 361 362 // apply all stream volumes to the specified output and device 363 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 364 365 // Mute or unmute all streams handled by the specified strategy on the specified output 366 void setStrategyMute(routing_strategy strategy, 367 bool on, 368 audio_io_handle_t output, 369 int delayMs = 0, 370 audio_devices_t device = (audio_devices_t)0); 371 372 // Mute or unmute the stream on the specified output 373 void setStreamMute(audio_stream_type_t stream, 374 bool on, 375 audio_io_handle_t output, 376 int delayMs = 0, 377 audio_devices_t device = (audio_devices_t)0); 378 379 // handle special cases for sonification strategy while in call: mute streams or replace by 380 // a special tone in the device used for communication 381 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 382 383 audio_mode_t getPhoneState(); 384 385 // true if device is in a telephony or VoIP call 386 virtual bool isInCall(); 387 // true if given state represents a device in a telephony or VoIP call 388 virtual bool isStateInCall(int state); 389 390 // when a device is connected, checks if an open output can be routed 391 // to this device. If none is open, tries to open one of the available outputs. 392 // Returns an output suitable to this device or 0. 393 // when a device is disconnected, checks if an output is not used any more and 394 // returns its handle if any. 395 // transfers the audio tracks and effects from one output thread to another accordingly. 396 status_t checkOutputsForDevice(const sp<DeviceDescriptor> devDesc, 397 audio_policy_dev_state_t state, 398 SortedVector<audio_io_handle_t>& outputs, 399 const String8 address); 400 401 status_t checkInputsForDevice(audio_devices_t device, 402 audio_policy_dev_state_t state, 403 SortedVector<audio_io_handle_t>& inputs, 404 const String8 address); 405 406 // close an output and its companion duplicating output. 407 void closeOutput(audio_io_handle_t output); 408 409 // close an input. 410 void closeInput(audio_io_handle_t input); 411 412 // checks and if necessary changes outputs used for all strategies. 413 // must be called every time a condition that affects the output choice for a given strategy 414 // changes: connected device, phone state, force use... 415 // Must be called before updateDevicesAndOutputs() 416 void checkOutputForStrategy(routing_strategy strategy); 417 418 // Same as checkOutputForStrategy() but for a all strategies in order of priority 419 void checkOutputForAllStrategies(); 420 421 // manages A2DP output suspend/restore according to phone state and BT SCO usage 422 void checkA2dpSuspend(); 423 424 // selects the most appropriate device on output for current state 425 // must be called every time a condition that affects the device choice for a given output is 426 // changed: connected device, phone state, force use, output start, output stop.. 427 // see getDeviceForStrategy() for the use of fromCache parameter 428 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 429 430 // updates cache of device used by all strategies (mDeviceForStrategy[]) 431 // must be called every time a condition that affects the device choice for a given strategy is 432 // changed: connected device, phone state, force use... 433 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 434 // Must be called after checkOutputForAllStrategies() 435 void updateDevicesAndOutputs(); 436 437 // selects the most appropriate device on input for current state 438 audio_devices_t getNewInputDevice(audio_io_handle_t input); 439 440 virtual uint32_t getMaxEffectsCpuLoad() 441 { 442 return mEffects.getMaxEffectsCpuLoad(); 443 } 444 445 virtual uint32_t getMaxEffectsMemory() 446 { 447 return mEffects.getMaxEffectsMemory(); 448 } 449#ifdef AUDIO_POLICY_TEST 450 virtual bool threadLoop(); 451 void exit(); 452 int testOutputIndex(audio_io_handle_t output); 453#endif //AUDIO_POLICY_TEST 454 455 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 456 AudioOutputCollection openOutputs); 457 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 458 SortedVector<audio_io_handle_t>& outputs2); 459 460 // mute/unmute strategies using an incompatible device combination 461 // if muting, wait for the audio in pcm buffer to be drained before proceeding 462 // if unmuting, unmute only after the specified delay 463 // Returns the number of ms waited 464 virtual uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 465 audio_devices_t prevDevice, 466 uint32_t delayMs); 467 468 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 469 audio_output_flags_t flags, 470 audio_format_t format); 471 // samplingRate parameter is an in/out and so may be modified 472 sp<IOProfile> getInputProfile(audio_devices_t device, 473 String8 address, 474 uint32_t& samplingRate, 475 audio_format_t format, 476 audio_channel_mask_t channelMask, 477 audio_input_flags_t flags); 478 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 479 uint32_t samplingRate, 480 audio_format_t format, 481 audio_channel_mask_t channelMask, 482 audio_output_flags_t flags); 483 484 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 485 486 virtual status_t addAudioPatch(audio_patch_handle_t handle, const sp<AudioPatch>& patch) 487 { 488 return mAudioPatches.addAudioPatch(handle, patch); 489 } 490 virtual status_t removeAudioPatch(audio_patch_handle_t handle) 491 { 492 return mAudioPatches.removeAudioPatch(handle); 493 } 494 495 audio_devices_t availablePrimaryOutputDevices() const 496 { 497 return mOutputs.getSupportedDevices(mPrimaryOutput) & mAvailableOutputDevices.types(); 498 } 499 audio_devices_t availablePrimaryInputDevices() const 500 { 501 return mAvailableInputDevices.getDevicesFromHwModule( 502 mOutputs.valueFor(mPrimaryOutput)->getModuleHandle()); 503 } 504 505 void updateCallRouting(audio_devices_t rxDevice, int delayMs = 0); 506 507 uid_t mUidCached; 508 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 509 audio_io_handle_t mPrimaryOutput; // primary output handle 510 // list of descriptors for outputs currently opened 511 AudioOutputCollection mOutputs; 512 // copy of mOutputs before setDeviceConnectionState() opens new outputs 513 // reset to mOutputs when updateDevicesAndOutputs() is called. 514 AudioOutputCollection mPreviousOutputs; 515 AudioInputCollection mInputs; // list of input descriptors 516 DeviceVector mAvailableOutputDevices; // all available output devices 517 DeviceVector mAvailableInputDevices; // all available input devices 518 519 SessionRouteMap mOutputRoutes; 520 SessionRouteMap mInputRoutes; 521 522 StreamDescriptorCollection mStreams; // stream descriptors for volume control 523 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 524 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 525 float mLastVoiceVolume; // last voice volume value sent to audio HAL 526 527 EffectDescriptorCollection mEffects; // list of registered audio effects 528 bool mA2dpSuspended; // true if A2DP output is suspended 529 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 530 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 531 // to boost soft sounds, used to adjust volume curves accordingly 532 533 HwModuleCollection mHwModules; 534 535 volatile int32_t mAudioPortGeneration; 536 537 AudioPatchCollection mAudioPatches; 538 539 SoundTriggerSessionCollection mSoundTriggerSessions; 540 541 sp<AudioPatch> mCallTxPatch; 542 sp<AudioPatch> mCallRxPatch; 543 544 // for supporting "beacon" streams, i.e. streams that only play on speaker, and never 545 // when something other than STREAM_TTS (a.k.a. "Transmitted Through Speaker") is playing 546 enum { 547 STARTING_OUTPUT, 548 STARTING_BEACON, 549 STOPPING_OUTPUT, 550 STOPPING_BEACON 551 }; 552 uint32_t mBeaconMuteRefCount; // ref count for stream that would mute beacon 553 uint32_t mBeaconPlayingRefCount;// ref count for the playing beacon streams 554 bool mBeaconMuted; // has STREAM_TTS been muted 555 556 AudioPolicyMixCollection mPolicyMixes; // list of registered mixes 557 558#ifdef AUDIO_POLICY_TEST 559 Mutex mLock; 560 Condition mWaitWorkCV; 561 562 int mCurOutput; 563 bool mDirectOutput; 564 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 565 int mTestInput; 566 uint32_t mTestDevice; 567 uint32_t mTestSamplingRate; 568 uint32_t mTestFormat; 569 uint32_t mTestChannels; 570 uint32_t mTestLatencyMs; 571#endif //AUDIO_POLICY_TEST 572 573 uint32_t nextAudioPortGeneration(); 574 575 // Audio Policy Engine Interface. 576 AudioPolicyManagerInterface *mEngine; 577private: 578 // updates device caching and output for streams that can influence the 579 // routing of notifications 580 void handleNotificationRoutingForStream(audio_stream_type_t stream); 581 // find the outputs on a given output descriptor that have the given address. 582 // to be called on an AudioOutputDescriptor whose supported devices (as defined 583 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 584 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 585 // where addresses are used to distinguish between one connected device and another. 586 void findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/, 587 const audio_devices_t device /*in*/, 588 const String8 address /*in*/, 589 SortedVector<audio_io_handle_t>& outputs /*out*/); 590 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 591 // internal method to return the output handle for the given device and format 592 audio_io_handle_t getOutputForDevice( 593 audio_devices_t device, 594 audio_session_t session, 595 audio_stream_type_t stream, 596 uint32_t samplingRate, 597 audio_format_t format, 598 audio_channel_mask_t channelMask, 599 audio_output_flags_t flags, 600 const audio_offload_info_t *offloadInfo); 601 // internal function to derive a stream type value from audio attributes 602 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 603 // event is one of STARTING_OUTPUT, STARTING_BEACON, STOPPING_OUTPUT, STOPPING_BEACON 604 // returns 0 if no mute/unmute event happened, the largest latency of the device where 605 // the mute/unmute happened 606 uint32_t handleEventForBeacon(int event); 607 uint32_t setBeaconMute(bool mute); 608 bool isValidAttributes(const audio_attributes_t *paa); 609 610 // select input device corresponding to requested audio source and return associated policy 611 // mix if any. Calls getDeviceForInputSource(). 612 audio_devices_t getDeviceAndMixForInputSource(audio_source_t inputSource, 613 AudioMix **policyMix = NULL); 614 615 // Called by setDeviceConnectionState(). 616 status_t setDeviceConnectionStateInt(audio_devices_t device, 617 audio_policy_dev_state_t state, 618 const char *device_address, 619 const char *device_name); 620}; 621 622}; 623