AudioPolicyManager.h revision f129b03fa583d4cc26fd9c9171b8fb3b0ed8d4f4
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#define SONIFICATION_HEADSET_VOLUME_FACTOR_DB (-6) 53// Min volume for STRATEGY_SONIFICATION streams when limited by music volume: -36dB 54#define SONIFICATION_HEADSET_VOLUME_MIN 0.016 55#define SONIFICATION_HEADSET_VOLUME_MIN_DB (-36) 56 57// Time in milliseconds during which we consider that music is still active after a music 58// track was stopped - see computeVolume() 59#define SONIFICATION_HEADSET_MUSIC_DELAY 5000 60 61// Time in milliseconds during witch some streams are muted while the audio path 62// is switched 63#define MUTE_TIME_MS 2000 64 65#define NUM_TEST_OUTPUTS 5 66 67#define NUM_VOL_CURVE_KNEES 2 68 69// Default minimum length allowed for offloading a compressed track 70// Can be overridden by the audio.offload.min.duration.secs property 71#define OFFLOAD_DEFAULT_MIN_DURATION_SECS 60 72 73// ---------------------------------------------------------------------------- 74// AudioPolicyManager implements audio policy manager behavior common to all platforms. 75// ---------------------------------------------------------------------------- 76 77class AudioPolicyManager : public AudioPolicyInterface, public AudioPolicyManagerObserver 78 79#ifdef AUDIO_POLICY_TEST 80 , public Thread 81#endif //AUDIO_POLICY_TEST 82{ 83 84public: 85 AudioPolicyManager(AudioPolicyClientInterface *clientInterface); 86 virtual ~AudioPolicyManager(); 87 88 // AudioPolicyInterface 89 virtual status_t setDeviceConnectionState(audio_devices_t device, 90 audio_policy_dev_state_t state, 91 const char *device_address, 92 const char *device_name); 93 virtual audio_policy_dev_state_t getDeviceConnectionState(audio_devices_t device, 94 const char *device_address); 95 virtual void setPhoneState(audio_mode_t state); 96 virtual void setForceUse(audio_policy_force_use_t usage, 97 audio_policy_forced_cfg_t config); 98 virtual audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage); 99 100 virtual void setSystemProperty(const char* property, const char* value); 101 virtual status_t initCheck(); 102 virtual audio_io_handle_t getOutput(audio_stream_type_t stream, 103 uint32_t samplingRate, 104 audio_format_t format, 105 audio_channel_mask_t channelMask, 106 audio_output_flags_t flags, 107 const audio_offload_info_t *offloadInfo); 108 virtual status_t getOutputForAttr(const audio_attributes_t *attr, 109 audio_io_handle_t *output, 110 audio_session_t session, 111 audio_stream_type_t *stream, 112 uint32_t samplingRate, 113 audio_format_t format, 114 audio_channel_mask_t channelMask, 115 audio_output_flags_t flags, 116 audio_port_handle_t selectedDeviceId, 117 const audio_offload_info_t *offloadInfo); 118 virtual status_t startOutput(audio_io_handle_t output, 119 audio_stream_type_t stream, 120 audio_session_t session); 121 virtual status_t stopOutput(audio_io_handle_t output, 122 audio_stream_type_t stream, 123 audio_session_t session); 124 virtual void releaseOutput(audio_io_handle_t output, 125 audio_stream_type_t stream, 126 audio_session_t session); 127 virtual status_t getInputForAttr(const audio_attributes_t *attr, 128 audio_io_handle_t *input, 129 audio_session_t session, 130 uint32_t samplingRate, 131 audio_format_t format, 132 audio_channel_mask_t channelMask, 133 audio_input_flags_t flags, 134 input_type_t *inputType); 135 136 // indicates to the audio policy manager that the input starts being used. 137 virtual status_t startInput(audio_io_handle_t input, 138 audio_session_t session); 139 140 // indicates to the audio policy manager that the input stops being used. 141 virtual status_t stopInput(audio_io_handle_t input, 142 audio_session_t session); 143 virtual void releaseInput(audio_io_handle_t input, 144 audio_session_t session); 145 virtual void closeAllInputs(); 146 virtual void initStreamVolume(audio_stream_type_t stream, 147 int indexMin, 148 int indexMax); 149 virtual status_t setStreamVolumeIndex(audio_stream_type_t stream, 150 int index, 151 audio_devices_t device); 152 virtual status_t getStreamVolumeIndex(audio_stream_type_t stream, 153 int *index, 154 audio_devices_t device); 155 156 // return the strategy corresponding to a given stream type 157 virtual uint32_t getStrategyForStream(audio_stream_type_t stream); 158 // return the strategy corresponding to the given audio attributes 159 virtual uint32_t getStrategyForAttr(const audio_attributes_t *attr); 160 161 // return the enabled output devices for the given stream type 162 virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream); 163 164 virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc = NULL); 165 virtual status_t registerEffect(const effect_descriptor_t *desc, 166 audio_io_handle_t io, 167 uint32_t strategy, 168 int session, 169 int id); 170 virtual status_t unregisterEffect(int id) 171 { 172 return mEffects.unregisterEffect(id); 173 } 174 virtual status_t setEffectEnabled(int id, bool enabled) 175 { 176 return mEffects.setEffectEnabled(id, enabled); 177 } 178 179 virtual bool isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 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, 186 uint32_t inPastMs = 0) const; 187 188 virtual bool isSourceActive(audio_source_t source) const; 189 190 virtual status_t dump(int fd); 191 192 virtual bool isOffloadSupported(const audio_offload_info_t& offloadInfo); 193 194 virtual status_t listAudioPorts(audio_port_role_t role, 195 audio_port_type_t type, 196 unsigned int *num_ports, 197 struct audio_port *ports, 198 unsigned int *generation); 199 virtual status_t getAudioPort(struct audio_port *port); 200 virtual status_t createAudioPatch(const struct audio_patch *patch, 201 audio_patch_handle_t *handle, 202 uid_t uid); 203 virtual status_t releaseAudioPatch(audio_patch_handle_t handle, 204 uid_t uid); 205 virtual status_t listAudioPatches(unsigned int *num_patches, 206 struct audio_patch *patches, 207 unsigned int *generation); 208 virtual status_t setAudioPortConfig(const struct audio_port_config *config); 209 virtual void clearAudioPatches(uid_t uid); 210 211 virtual status_t acquireSoundTriggerSession(audio_session_t *session, 212 audio_io_handle_t *ioHandle, 213 audio_devices_t *device); 214 215 virtual status_t releaseSoundTriggerSession(audio_session_t session) 216 { 217 return mSoundTriggerSessions.releaseSession(session); 218 } 219 220 virtual status_t registerPolicyMixes(Vector<AudioMix> mixes); 221 virtual status_t unregisterPolicyMixes(Vector<AudioMix> mixes); 222 223 // Audio policy configuration file parsing (audio_policy.conf) 224 // TODO candidates to be moved to ConfigParsingUtils 225 void defaultAudioPolicyConfig(void); 226 227 // return the strategy corresponding to a given stream type 228 routing_strategy getStrategy(audio_stream_type_t stream) const; 229 230protected: 231 class SessionRoute : public RefBase 232 { 233 public: 234 friend class SessionRouteMap; 235 SessionRoute(audio_session_t session, 236 audio_stream_type_t streamType, 237 sp<DeviceDescriptor> deviceDescriptor) 238 : mSession(session), 239 mStreamType(streamType), 240 mDeviceDescriptor(deviceDescriptor), 241 mRefCount(0), 242 mActivityCount(0) {} 243 244 audio_session_t mSession; 245 audio_stream_type_t mStreamType; 246 247 sp<DeviceDescriptor> mDeviceDescriptor; 248 249 // "reference" counting 250 int mRefCount; // +/- on references 251 int mActivityCount; // +/- on start/stop 252 253 void log(const char* prefix); 254 }; 255 256 class SessionRouteMap: public KeyedVector<audio_session_t, sp<SessionRoute>> 257 { 258 public: 259 bool hasRoute(audio_session_t session); 260 void addRoute(audio_session_t session, audio_stream_type_t streamType, 261 sp<DeviceDescriptor> deviceDescriptor); 262 void removeRoute(audio_session_t session); 263 264 int incRouteActivity(audio_session_t session); 265 int decRouteActivity(audio_session_t session); 266 267 void log(const char* caption); 268 }; 269 270 // From AudioPolicyManagerObserver 271 virtual const AudioPatchCollection &getAudioPatches() const 272 { 273 return mAudioPatches; 274 } 275 virtual const SoundTriggerSessionCollection &getSoundTriggerSessionCollection() const 276 { 277 return mSoundTriggerSessions; 278 } 279 virtual const AudioPolicyMixCollection &getAudioPolicyMixCollection() const 280 { 281 return mPolicyMixes; 282 } 283 virtual const SwAudioOutputCollection &getOutputs() const 284 { 285 return mOutputs; 286 } 287 virtual const AudioInputCollection &getInputs() const 288 { 289 return mInputs; 290 } 291 virtual const DeviceVector &getAvailableOutputDevices() const 292 { 293 return mAvailableOutputDevices; 294 } 295 virtual const DeviceVector &getAvailableInputDevices() const 296 { 297 return mAvailableInputDevices; 298 } 299 virtual StreamDescriptorCollection &getStreamDescriptors() 300 { 301 return mStreams; 302 } 303 virtual const sp<DeviceDescriptor> &getDefaultOutputDevice() const 304 { 305 return mDefaultOutputDevice; 306 } 307protected: 308 void addOutput(audio_io_handle_t output, sp<SwAudioOutputDescriptor> outputDesc); 309 void removeOutput(audio_io_handle_t output); 310 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 311 312 // return appropriate device for streams handled by the specified strategy according to current 313 // phone state, connected devices... 314 // if fromCache is true, the device is returned from mDeviceForStrategy[], 315 // otherwise it is determine by current state 316 // (device connected,phone state, force use, a2dp output...) 317 // This allows to: 318 // 1 speed up process when the state is stable (when starting or stopping an output) 319 // 2 access to either current device selection (fromCache == true) or 320 // "future" device selection (fromCache == false) when called from a context 321 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 322 // before updateDevicesAndOutputs() is called. 323 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 324 bool fromCache); 325 326 bool isStrategyActive(const sp<AudioOutputDescriptor> outputDesc, routing_strategy strategy, 327 uint32_t inPastMs = 0, nsecs_t sysTime = 0) const; 328 329 // change the route of the specified output. Returns the number of ms we have slept to 330 // allow new routing to take effect in certain cases. 331 virtual uint32_t setOutputDevice(const sp<AudioOutputDescriptor>& outputDesc, 332 audio_devices_t device, 333 bool force = false, 334 int delayMs = 0, 335 audio_patch_handle_t *patchHandle = NULL, 336 const char* address = NULL); 337 status_t resetOutputDevice(const sp<AudioOutputDescriptor>& outputDesc, 338 int delayMs = 0, 339 audio_patch_handle_t *patchHandle = NULL); 340 status_t setInputDevice(audio_io_handle_t input, 341 audio_devices_t device, 342 bool force = false, 343 audio_patch_handle_t *patchHandle = NULL); 344 status_t resetInputDevice(audio_io_handle_t input, 345 audio_patch_handle_t *patchHandle = NULL); 346 347 // select input device corresponding to requested audio source 348 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 349 350 // compute the actual volume for a given stream according to the requested index and a particular 351 // device 352 virtual float computeVolume(audio_stream_type_t stream, 353 int index, 354 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 const sp<AudioOutputDescriptor>& outputDesc, 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(const sp<AudioOutputDescriptor>& outputDesc, 364 audio_devices_t device, int delayMs = 0, bool force = false); 365 366 // Mute or unmute all streams handled by the specified strategy on the specified output 367 void setStrategyMute(routing_strategy strategy, 368 bool on, 369 const sp<AudioOutputDescriptor>& outputDesc, 370 int delayMs = 0, 371 audio_devices_t device = (audio_devices_t)0); 372 373 // Mute or unmute the stream on the specified output 374 void setStreamMute(audio_stream_type_t stream, 375 bool on, 376 const sp<AudioOutputDescriptor>& outputDesc, 377 int delayMs = 0, 378 audio_devices_t device = (audio_devices_t)0); 379 380 // handle special cases for sonification strategy while in call: mute streams or replace by 381 // a special tone in the device used for communication 382 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 383 384 audio_mode_t getPhoneState(); 385 386 // true if device is in a telephony or VoIP call 387 virtual bool isInCall(); 388 // true if given state represents a device in a telephony or VoIP call 389 virtual bool isStateInCall(int state); 390 391 // when a device is connected, checks if an open output can be routed 392 // to this device. If none is open, tries to open one of the available outputs. 393 // Returns an output suitable to this device or 0. 394 // when a device is disconnected, checks if an output is not used any more and 395 // returns its handle if any. 396 // transfers the audio tracks and effects from one output thread to another accordingly. 397 status_t checkOutputsForDevice(const sp<DeviceDescriptor> devDesc, 398 audio_policy_dev_state_t state, 399 SortedVector<audio_io_handle_t>& outputs, 400 const String8 address); 401 402 status_t checkInputsForDevice(audio_devices_t device, 403 audio_policy_dev_state_t state, 404 SortedVector<audio_io_handle_t>& inputs, 405 const String8 address); 406 407 // close an output and its companion duplicating output. 408 void closeOutput(audio_io_handle_t output); 409 410 // close an input. 411 void closeInput(audio_io_handle_t input); 412 413 // checks and if necessary changes outputs used for all strategies. 414 // must be called every time a condition that affects the output choice for a given strategy 415 // changes: connected device, phone state, force use... 416 // Must be called before updateDevicesAndOutputs() 417 void checkOutputForStrategy(routing_strategy strategy); 418 419 // Same as checkOutputForStrategy() but for a all strategies in order of priority 420 void checkOutputForAllStrategies(); 421 422 // manages A2DP output suspend/restore according to phone state and BT SCO usage 423 void checkA2dpSuspend(); 424 425 // selects the most appropriate device on output for current state 426 // must be called every time a condition that affects the device choice for a given output is 427 // changed: connected device, phone state, force use, output start, output stop.. 428 // see getDeviceForStrategy() for the use of fromCache parameter 429 audio_devices_t getNewOutputDevice(const sp<AudioOutputDescriptor>& outputDesc, 430 bool fromCache); 431 432 // updates cache of device used by all strategies (mDeviceForStrategy[]) 433 // must be called every time a condition that affects the device choice for a given strategy is 434 // changed: connected device, phone state, force use... 435 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 436 // Must be called after checkOutputForAllStrategies() 437 void updateDevicesAndOutputs(); 438 439 // selects the most appropriate device on input for current state 440 audio_devices_t getNewInputDevice(audio_io_handle_t input); 441 442 virtual uint32_t getMaxEffectsCpuLoad() 443 { 444 return mEffects.getMaxEffectsCpuLoad(); 445 } 446 447 virtual uint32_t getMaxEffectsMemory() 448 { 449 return mEffects.getMaxEffectsMemory(); 450 } 451#ifdef AUDIO_POLICY_TEST 452 virtual bool threadLoop(); 453 void exit(); 454 int testOutputIndex(audio_io_handle_t output); 455#endif //AUDIO_POLICY_TEST 456 457 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 458 SwAudioOutputCollection openOutputs); 459 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 460 SortedVector<audio_io_handle_t>& outputs2); 461 462 // mute/unmute strategies using an incompatible device combination 463 // if muting, wait for the audio in pcm buffer to be drained before proceeding 464 // if unmuting, unmute only after the specified delay 465 // Returns the number of ms waited 466 virtual uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 467 audio_devices_t prevDevice, 468 uint32_t delayMs); 469 470 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 471 audio_output_flags_t flags, 472 audio_format_t format); 473 // samplingRate, format, channelMask are in/out and so may be modified 474 sp<IOProfile> getInputProfile(audio_devices_t device, 475 String8 address, 476 uint32_t& samplingRate, 477 audio_format_t& format, 478 audio_channel_mask_t& channelMask, 479 audio_input_flags_t flags); 480 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 481 uint32_t samplingRate, 482 audio_format_t format, 483 audio_channel_mask_t channelMask, 484 audio_output_flags_t flags); 485 486 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 487 488 virtual status_t addAudioPatch(audio_patch_handle_t handle, const sp<AudioPatch>& patch) 489 { 490 return mAudioPatches.addAudioPatch(handle, patch); 491 } 492 virtual status_t removeAudioPatch(audio_patch_handle_t handle) 493 { 494 return mAudioPatches.removeAudioPatch(handle); 495 } 496 497 audio_devices_t availablePrimaryOutputDevices() const 498 { 499 return mPrimaryOutput->supportedDevices() & mAvailableOutputDevices.types(); 500 } 501 audio_devices_t availablePrimaryInputDevices() const 502 { 503 return mAvailableInputDevices.getDevicesFromHwModule(mPrimaryOutput->getModuleHandle()); 504 } 505 506 void updateCallRouting(audio_devices_t rxDevice, int delayMs = 0); 507 508 status_t startSource(sp<AudioOutputDescriptor> outputDesc, 509 audio_stream_type_t stream, 510 audio_devices_t device, 511 uint32_t *delayMs); 512 status_t stopSource(sp<AudioOutputDescriptor> outputDesc, 513 audio_stream_type_t stream); 514 515 uid_t mUidCached; 516 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 517 sp<SwAudioOutputDescriptor> mPrimaryOutput; // primary output descriptor 518 // list of descriptors for outputs currently opened 519 520 SwAudioOutputCollection mOutputs; 521 // copy of mOutputs before setDeviceConnectionState() opens new outputs 522 // reset to mOutputs when updateDevicesAndOutputs() is called. 523 SwAudioOutputCollection mPreviousOutputs; 524 AudioInputCollection mInputs; // list of input descriptors 525 526 DeviceVector mAvailableOutputDevices; // all available output devices 527 DeviceVector mAvailableInputDevices; // all available input devices 528 529 SessionRouteMap mOutputRoutes; 530 SessionRouteMap mInputRoutes; 531 532 StreamDescriptorCollection mStreams; // stream descriptors for volume control 533 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 534 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 535 float mLastVoiceVolume; // last voice volume value sent to audio HAL 536 537 EffectDescriptorCollection mEffects; // list of registered audio effects 538 bool mA2dpSuspended; // true if A2DP output is suspended 539 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 540 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 541 // to boost soft sounds, used to adjust volume curves accordingly 542 543 HwModuleCollection mHwModules; 544 545 volatile int32_t mAudioPortGeneration; 546 547 AudioPatchCollection mAudioPatches; 548 549 SoundTriggerSessionCollection mSoundTriggerSessions; 550 551 sp<AudioPatch> mCallTxPatch; 552 sp<AudioPatch> mCallRxPatch; 553 554 // for supporting "beacon" streams, i.e. streams that only play on speaker, and never 555 // when something other than STREAM_TTS (a.k.a. "Transmitted Through Speaker") is playing 556 enum { 557 STARTING_OUTPUT, 558 STARTING_BEACON, 559 STOPPING_OUTPUT, 560 STOPPING_BEACON 561 }; 562 uint32_t mBeaconMuteRefCount; // ref count for stream that would mute beacon 563 uint32_t mBeaconPlayingRefCount;// ref count for the playing beacon streams 564 bool mBeaconMuted; // has STREAM_TTS been muted 565 566 AudioPolicyMixCollection mPolicyMixes; // list of registered mixes 567 568#ifdef AUDIO_POLICY_TEST 569 Mutex mLock; 570 Condition mWaitWorkCV; 571 572 int mCurOutput; 573 bool mDirectOutput; 574 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 575 int mTestInput; 576 uint32_t mTestDevice; 577 uint32_t mTestSamplingRate; 578 uint32_t mTestFormat; 579 uint32_t mTestChannels; 580 uint32_t mTestLatencyMs; 581#endif //AUDIO_POLICY_TEST 582 583 uint32_t nextAudioPortGeneration(); 584 585 // Audio Policy Engine Interface. 586 AudioPolicyManagerInterface *mEngine; 587private: 588 // updates device caching and output for streams that can influence the 589 // routing of notifications 590 void handleNotificationRoutingForStream(audio_stream_type_t stream); 591 // find the outputs on a given output descriptor that have the given address. 592 // to be called on an AudioOutputDescriptor whose supported devices (as defined 593 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 594 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 595 // where addresses are used to distinguish between one connected device and another. 596 void findIoHandlesByAddress(sp<SwAudioOutputDescriptor> desc /*in*/, 597 const audio_devices_t device /*in*/, 598 const String8 address /*in*/, 599 SortedVector<audio_io_handle_t>& outputs /*out*/); 600 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 601 // internal method to return the output handle for the given device and format 602 audio_io_handle_t getOutputForDevice( 603 audio_devices_t device, 604 audio_session_t session, 605 audio_stream_type_t stream, 606 uint32_t samplingRate, 607 audio_format_t format, 608 audio_channel_mask_t channelMask, 609 audio_output_flags_t flags, 610 const audio_offload_info_t *offloadInfo); 611 // internal function to derive a stream type value from audio attributes 612 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 613 // event is one of STARTING_OUTPUT, STARTING_BEACON, STOPPING_OUTPUT, STOPPING_BEACON 614 // returns 0 if no mute/unmute event happened, the largest latency of the device where 615 // the mute/unmute happened 616 uint32_t handleEventForBeacon(int event); 617 uint32_t setBeaconMute(bool mute); 618 bool isValidAttributes(const audio_attributes_t *paa); 619 620 // select input device corresponding to requested audio source and return associated policy 621 // mix if any. Calls getDeviceForInputSource(). 622 audio_devices_t getDeviceAndMixForInputSource(audio_source_t inputSource, 623 AudioMix **policyMix = NULL); 624 625 // Called by setDeviceConnectionState(). 626 status_t setDeviceConnectionStateInt(audio_devices_t device, 627 audio_policy_dev_state_t state, 628 const char *device_address, 629 const char *device_name); 630}; 631 632}; 633