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/AudioParameter.h> 28 #include <media/AudioPolicy.h> 29 #include "AudioPolicyInterface.h" 30 31 #include <AudioPolicyManagerInterface.h> 32 #include <AudioPolicyManagerObserver.h> 33 #include <AudioGain.h> 34 #include <AudioPort.h> 35 #include <AudioPatch.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 <SessionRoute.h> 45 #include <VolumeCurve.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_DB (-6) 53 // Min volume for STRATEGY_SONIFICATION streams when limited by music volume: -36dB 54 #define SONIFICATION_HEADSET_VOLUME_MIN_DB (-36) 55 // Max volume difference on A2DP between playing media and STRATEGY_SONIFICATION streams: 12dB 56 #define SONIFICATION_A2DP_MAX_MEDIA_DIFF_DB (12) 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); 174 virtual status_t unregisterEffect(int id) 175 { 176 return mEffects.unregisterEffect(id); 177 } 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 void releaseResourcesForUid(uid_t uid); 215 216 virtual status_t acquireSoundTriggerSession(audio_session_t *session, 217 audio_io_handle_t *ioHandle, 218 audio_devices_t *device); 219 220 virtual status_t releaseSoundTriggerSession(audio_session_t session) 221 { 222 return mSoundTriggerSessions.releaseSession(session); 223 } 224 225 virtual status_t registerPolicyMixes(Vector<AudioMix> mixes); 226 virtual status_t unregisterPolicyMixes(Vector<AudioMix> mixes); 227 228 virtual status_t startAudioSource(const struct audio_port_config *source, 229 const audio_attributes_t *attributes, 230 audio_io_handle_t *handle, 231 uid_t uid); 232 virtual status_t stopAudioSource(audio_io_handle_t handle); 233 234 virtual status_t setMasterMono(bool mono); 235 virtual status_t getMasterMono(bool *mono); 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 242 virtual const AudioPatchCollection &getAudioPatches() const 243 { 244 return mAudioPatches; 245 } 246 virtual const SoundTriggerSessionCollection &getSoundTriggerSessionCollection() const 247 { 248 return mSoundTriggerSessions; 249 } 250 virtual const AudioPolicyMixCollection &getAudioPolicyMixCollection() const 251 { 252 return mPolicyMixes; 253 } 254 virtual const SwAudioOutputCollection &getOutputs() const 255 { 256 return mOutputs; 257 } 258 virtual const AudioInputCollection &getInputs() const 259 { 260 return mInputs; 261 } 262 virtual const DeviceVector &getAvailableOutputDevices() const 263 { 264 return mAvailableOutputDevices; 265 } 266 virtual const DeviceVector &getAvailableInputDevices() const 267 { 268 return mAvailableInputDevices; 269 } 270 virtual IVolumeCurvesCollection &getVolumeCurves() { return *mVolumeCurves; } 271 virtual const sp<DeviceDescriptor> &getDefaultOutputDevice() const 272 { 273 return mDefaultOutputDevice; 274 } 275 protected: 276 void addOutput(audio_io_handle_t output, sp<SwAudioOutputDescriptor> outputDesc); 277 void removeOutput(audio_io_handle_t output); 278 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 279 280 // return appropriate device for streams handled by the specified strategy according to current 281 // phone state, connected devices... 282 // if fromCache is true, the device is returned from mDeviceForStrategy[], 283 // otherwise it is determine by current state 284 // (device connected,phone state, force use, a2dp output...) 285 // This allows to: 286 // 1 speed up process when the state is stable (when starting or stopping an output) 287 // 2 access to either current device selection (fromCache == true) or 288 // "future" device selection (fromCache == false) when called from a context 289 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 290 // before updateDevicesAndOutputs() is called. 291 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 292 bool fromCache); 293 294 bool isStrategyActive(const sp<AudioOutputDescriptor> outputDesc, routing_strategy strategy, 295 uint32_t inPastMs = 0, nsecs_t sysTime = 0) const; 296 297 // change the route of the specified output. Returns the number of ms we have slept to 298 // allow new routing to take effect in certain cases. 299 virtual uint32_t setOutputDevice(const sp<AudioOutputDescriptor>& outputDesc, 300 audio_devices_t device, 301 bool force = false, 302 int delayMs = 0, 303 audio_patch_handle_t *patchHandle = NULL, 304 const char* address = NULL); 305 status_t resetOutputDevice(const sp<AudioOutputDescriptor>& outputDesc, 306 int delayMs = 0, 307 audio_patch_handle_t *patchHandle = NULL); 308 status_t setInputDevice(audio_io_handle_t input, 309 audio_devices_t device, 310 bool force = false, 311 audio_patch_handle_t *patchHandle = NULL); 312 status_t resetInputDevice(audio_io_handle_t input, 313 audio_patch_handle_t *patchHandle = NULL); 314 315 // select input device corresponding to requested audio source 316 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 317 318 // compute the actual volume for a given stream according to the requested index and a particular 319 // device 320 virtual float computeVolume(audio_stream_type_t stream, 321 int index, 322 audio_devices_t device); 323 324 // check that volume change is permitted, compute and send new volume to audio hardware 325 virtual status_t checkAndSetVolume(audio_stream_type_t stream, int index, 326 const sp<AudioOutputDescriptor>& outputDesc, 327 audio_devices_t device, 328 int delayMs = 0, bool force = false); 329 330 // apply all stream volumes to the specified output and device 331 void applyStreamVolumes(const sp<AudioOutputDescriptor>& outputDesc, 332 audio_devices_t device, int delayMs = 0, bool force = false); 333 334 // Mute or unmute all streams handled by the specified strategy on the specified output 335 void setStrategyMute(routing_strategy strategy, 336 bool on, 337 const sp<AudioOutputDescriptor>& outputDesc, 338 int delayMs = 0, 339 audio_devices_t device = (audio_devices_t)0); 340 341 // Mute or unmute the stream on the specified output 342 void setStreamMute(audio_stream_type_t stream, 343 bool on, 344 const sp<AudioOutputDescriptor>& outputDesc, 345 int delayMs = 0, 346 audio_devices_t device = (audio_devices_t)0); 347 348 // handle special cases for sonification strategy while in call: mute streams or replace by 349 // a special tone in the device used for communication 350 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 351 352 audio_mode_t getPhoneState(); 353 354 // true if device is in a telephony or VoIP call 355 virtual bool isInCall(); 356 // true if given state represents a device in a telephony or VoIP call 357 virtual bool isStateInCall(int state); 358 359 // when a device is connected, checks if an open output can be routed 360 // to this device. If none is open, tries to open one of the available outputs. 361 // Returns an output suitable to this device or 0. 362 // when a device is disconnected, checks if an output is not used any more and 363 // returns its handle if any. 364 // transfers the audio tracks and effects from one output thread to another accordingly. 365 status_t checkOutputsForDevice(const sp<DeviceDescriptor> devDesc, 366 audio_policy_dev_state_t state, 367 SortedVector<audio_io_handle_t>& outputs, 368 const String8 address); 369 370 status_t checkInputsForDevice(const sp<DeviceDescriptor> devDesc, 371 audio_policy_dev_state_t state, 372 SortedVector<audio_io_handle_t>& inputs, 373 const String8 address); 374 375 // close an output and its companion duplicating output. 376 void closeOutput(audio_io_handle_t output); 377 378 // close an input. 379 void closeInput(audio_io_handle_t input); 380 381 // checks and if necessary changes outputs used for all strategies. 382 // must be called every time a condition that affects the output choice for a given strategy 383 // changes: connected device, phone state, force use... 384 // Must be called before updateDevicesAndOutputs() 385 void checkOutputForStrategy(routing_strategy strategy); 386 387 // Same as checkOutputForStrategy() but for a all strategies in order of priority 388 void checkOutputForAllStrategies(); 389 390 // manages A2DP output suspend/restore according to phone state and BT SCO usage 391 void checkA2dpSuspend(); 392 393 // selects the most appropriate device on output for current state 394 // must be called every time a condition that affects the device choice for a given output is 395 // changed: connected device, phone state, force use, output start, output stop.. 396 // see getDeviceForStrategy() for the use of fromCache parameter 397 audio_devices_t getNewOutputDevice(const sp<AudioOutputDescriptor>& outputDesc, 398 bool fromCache); 399 400 // updates cache of device used by all strategies (mDeviceForStrategy[]) 401 // must be called every time a condition that affects the device choice for a given strategy is 402 // changed: connected device, phone state, force use... 403 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 404 // Must be called after checkOutputForAllStrategies() 405 void updateDevicesAndOutputs(); 406 407 // selects the most appropriate device on input for current state 408 audio_devices_t getNewInputDevice(audio_io_handle_t input); 409 410 virtual uint32_t getMaxEffectsCpuLoad() 411 { 412 return mEffects.getMaxEffectsCpuLoad(); 413 } 414 415 virtual uint32_t getMaxEffectsMemory() 416 { 417 return mEffects.getMaxEffectsMemory(); 418 } 419 #ifdef AUDIO_POLICY_TEST 420 virtual bool threadLoop(); 421 void exit(); 422 int testOutputIndex(audio_io_handle_t output); 423 #endif //AUDIO_POLICY_TEST 424 425 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 426 SwAudioOutputCollection openOutputs); 427 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 428 SortedVector<audio_io_handle_t>& outputs2); 429 430 // mute/unmute strategies using an incompatible device combination 431 // if muting, wait for the audio in pcm buffer to be drained before proceeding 432 // if unmuting, unmute only after the specified delay 433 // Returns the number of ms waited 434 virtual uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 435 audio_devices_t prevDevice, 436 uint32_t delayMs); 437 438 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 439 audio_output_flags_t flags, 440 audio_format_t format); 441 // samplingRate, format, channelMask are in/out and so may be modified 442 sp<IOProfile> getInputProfile(audio_devices_t device, 443 String8 address, 444 uint32_t& samplingRate, 445 audio_format_t& format, 446 audio_channel_mask_t& channelMask, 447 audio_input_flags_t flags); 448 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 449 uint32_t samplingRate, 450 audio_format_t format, 451 audio_channel_mask_t channelMask, 452 audio_output_flags_t flags); 453 454 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 455 456 virtual status_t addAudioPatch(audio_patch_handle_t handle, const sp<AudioPatch>& patch) 457 { 458 return mAudioPatches.addAudioPatch(handle, patch); 459 } 460 virtual status_t removeAudioPatch(audio_patch_handle_t handle) 461 { 462 return mAudioPatches.removeAudioPatch(handle); 463 } 464 465 audio_devices_t availablePrimaryOutputDevices() const 466 { 467 if (!hasPrimaryOutput()) { 468 return AUDIO_DEVICE_NONE; 469 } 470 return mPrimaryOutput->supportedDevices() & mAvailableOutputDevices.types(); 471 } 472 audio_devices_t availablePrimaryInputDevices() const 473 { 474 if (!hasPrimaryOutput()) { 475 return AUDIO_DEVICE_NONE; 476 } 477 return mAvailableInputDevices.getDevicesFromHwModule(mPrimaryOutput->getModuleHandle()); 478 } 479 480 uint32_t updateCallRouting(audio_devices_t rxDevice, uint32_t delayMs = 0); 481 482 // if argument "device" is different from AUDIO_DEVICE_NONE, startSource() will force 483 // the re-evaluation of the output device. 484 status_t startSource(sp<AudioOutputDescriptor> outputDesc, 485 audio_stream_type_t stream, 486 audio_devices_t device, 487 const char *address, 488 uint32_t *delayMs); 489 status_t stopSource(sp<AudioOutputDescriptor> outputDesc, 490 audio_stream_type_t stream, 491 bool forceDeviceUpdate); 492 493 void clearAudioPatches(uid_t uid); 494 void clearSessionRoutes(uid_t uid); 495 void checkStrategyRoute(routing_strategy strategy, audio_io_handle_t ouptutToSkip); 496 497 status_t hasPrimaryOutput() const { return mPrimaryOutput != 0; } 498 499 status_t connectAudioSource(const sp<AudioSourceDescriptor>& sourceDesc); 500 status_t disconnectAudioSource(const sp<AudioSourceDescriptor>& sourceDesc); 501 502 sp<AudioSourceDescriptor> getSourceForStrategyOnOutput(audio_io_handle_t output, 503 routing_strategy strategy); 504 505 void cleanUpForDevice(const sp<DeviceDescriptor>& deviceDesc); 506 507 void clearAudioSources(uid_t uid); 508 509 510 static bool streamsMatchForvolume(audio_stream_type_t stream1, 511 audio_stream_type_t stream2); 512 513 uid_t mUidCached; 514 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 515 sp<SwAudioOutputDescriptor> mPrimaryOutput; // primary output descriptor 516 // list of descriptors for outputs currently opened 517 518 SwAudioOutputCollection mOutputs; 519 // copy of mOutputs before setDeviceConnectionState() opens new outputs 520 // reset to mOutputs when updateDevicesAndOutputs() is called. 521 SwAudioOutputCollection mPreviousOutputs; 522 AudioInputCollection mInputs; // list of input descriptors 523 524 DeviceVector mAvailableOutputDevices; // all available output devices 525 DeviceVector mAvailableInputDevices; // all available input devices 526 527 SessionRouteMap mOutputRoutes = SessionRouteMap(SessionRouteMap::MAPTYPE_OUTPUT); 528 SessionRouteMap mInputRoutes = SessionRouteMap(SessionRouteMap::MAPTYPE_INPUT); 529 530 IVolumeCurvesCollection *mVolumeCurves; // Volume Curves per use case and device category 531 532 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 533 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 534 float mLastVoiceVolume; // last voice volume value sent to audio HAL 535 536 EffectDescriptorCollection mEffects; // list of registered audio effects 537 bool mA2dpSuspended; // true if A2DP output is suspended 538 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 539 HwModuleCollection mHwModules; 540 541 volatile int32_t mAudioPortGeneration; 542 543 AudioPatchCollection mAudioPatches; 544 545 SoundTriggerSessionCollection mSoundTriggerSessions; 546 547 sp<AudioPatch> mCallTxPatch; 548 sp<AudioPatch> mCallRxPatch; 549 550 HwAudioOutputCollection mHwOutputs; 551 AudioSourceCollection mAudioSources; 552 553 // for supporting "beacon" streams, i.e. streams that only play on speaker, and never 554 // when something other than STREAM_TTS (a.k.a. "Transmitted Through Speaker") is playing 555 enum { 556 STARTING_OUTPUT, 557 STARTING_BEACON, 558 STOPPING_OUTPUT, 559 STOPPING_BEACON 560 }; 561 uint32_t mBeaconMuteRefCount; // ref count for stream that would mute beacon 562 uint32_t mBeaconPlayingRefCount;// ref count for the playing beacon streams 563 bool mBeaconMuted; // has STREAM_TTS been muted 564 bool mTtsOutputAvailable; // true if a dedicated output for TTS stream is available 565 566 bool mMasterMono; // true if we wish to force all outputs to mono 567 AudioPolicyMixCollection mPolicyMixes; // list of registered mixes 568 569 #ifdef AUDIO_POLICY_TEST 570 Mutex mLock; 571 Condition mWaitWorkCV; 572 573 int mCurOutput; 574 bool mDirectOutput; 575 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 576 int mTestInput; 577 uint32_t mTestDevice; 578 uint32_t mTestSamplingRate; 579 uint32_t mTestFormat; 580 uint32_t mTestChannels; 581 uint32_t mTestLatencyMs; 582 #endif //AUDIO_POLICY_TEST 583 584 uint32_t nextAudioPortGeneration(); 585 586 // Audio Policy Engine Interface. 587 AudioPolicyManagerInterface *mEngine; 588 private: 589 // Add or remove AC3 DTS encodings based on user preferences. 590 void filterSurroundFormats(FormatVector *formatsPtr); 591 void filterSurroundChannelMasks(ChannelsVector *channelMasksPtr); 592 593 // If any, resolve any "dynamic" fields of an Audio Profiles collection 594 void updateAudioProfiles(audio_devices_t device, audio_io_handle_t ioHandle, 595 AudioProfileVector &profiles); 596 597 // updates device caching and output for streams that can influence the 598 // routing of notifications 599 void handleNotificationRoutingForStream(audio_stream_type_t stream); 600 // find the outputs on a given output descriptor that have the given address. 601 // to be called on an AudioOutputDescriptor whose supported devices (as defined 602 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 603 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 604 // where addresses are used to distinguish between one connected device and another. 605 void findIoHandlesByAddress(sp<SwAudioOutputDescriptor> desc /*in*/, 606 const audio_devices_t device /*in*/, 607 const String8 address /*in*/, 608 SortedVector<audio_io_handle_t>& outputs /*out*/); 609 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 610 // internal method to return the output handle for the given device and format 611 audio_io_handle_t getOutputForDevice( 612 audio_devices_t device, 613 audio_session_t session, 614 audio_stream_type_t stream, 615 uint32_t samplingRate, 616 audio_format_t format, 617 audio_channel_mask_t channelMask, 618 audio_output_flags_t flags, 619 const audio_offload_info_t *offloadInfo); 620 // internal method to return the input handle for the given device and format 621 audio_io_handle_t getInputForDevice(audio_devices_t device, 622 String8 address, 623 audio_session_t session, 624 uid_t uid, 625 audio_source_t inputSource, 626 uint32_t samplingRate, 627 audio_format_t format, 628 audio_channel_mask_t channelMask, 629 audio_input_flags_t flags, 630 AudioMix *policyMix); 631 632 // internal function to derive a stream type value from audio attributes 633 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 634 // event is one of STARTING_OUTPUT, STARTING_BEACON, STOPPING_OUTPUT, STOPPING_BEACON 635 // returns 0 if no mute/unmute event happened, the largest latency of the device where 636 // the mute/unmute happened 637 uint32_t handleEventForBeacon(int event); 638 uint32_t setBeaconMute(bool mute); 639 bool isValidAttributes(const audio_attributes_t *paa); 640 641 // select input device corresponding to requested audio source and return associated policy 642 // mix if any. Calls getDeviceForInputSource(). 643 audio_devices_t getDeviceAndMixForInputSource(audio_source_t inputSource, 644 AudioMix **policyMix = NULL); 645 646 // Called by setDeviceConnectionState(). 647 status_t setDeviceConnectionStateInt(audio_devices_t device, 648 audio_policy_dev_state_t state, 649 const char *device_address, 650 const char *device_name); 651 void updateMono(audio_io_handle_t output) { 652 AudioParameter param; 653 param.addInt(String8(AUDIO_PARAMETER_MONO_OUTPUT), (int)mMasterMono); 654 mpClientInterface->setParameters(output, param.toString()); 655 } 656 }; 657 658 }; 659
