AudioPolicyManager.h revision 56ec4ffcbae8aeac6c5245fc7b825d02e2e6cefd
1/* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 18#include <stdint.h> 19#include <sys/types.h> 20#include <cutils/config_utils.h> 21#include <cutils/misc.h> 22#include <utils/Timers.h> 23#include <utils/Errors.h> 24#include <utils/KeyedVector.h> 25#include <utils/SortedVector.h> 26#include <media/AudioPolicy.h> 27#include "AudioPolicyInterface.h" 28 29#include "Gains.h" 30#include "Ports.h" 31#include "ConfigParsingUtils.h" 32#include "Devices.h" 33#include "IOProfile.h" 34#include "HwModule.h" 35#include "AudioInputDescriptor.h" 36#include "AudioOutputDescriptor.h" 37 38namespace android { 39 40// ---------------------------------------------------------------------------- 41 42// Attenuation applied to STRATEGY_SONIFICATION streams when a headset is connected: 6dB 43#define SONIFICATION_HEADSET_VOLUME_FACTOR 0.5 44// Min volume for STRATEGY_SONIFICATION streams when limited by music volume: -36dB 45#define SONIFICATION_HEADSET_VOLUME_MIN 0.016 46// Time in milliseconds during which we consider that music is still active after a music 47// track was stopped - see computeVolume() 48#define SONIFICATION_HEADSET_MUSIC_DELAY 5000 49// Time in milliseconds after media stopped playing during which we consider that the 50// sonification should be as unobtrusive as during the time media was playing. 51#define SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY 5000 52// Time in milliseconds during witch some streams are muted while the audio path 53// is switched 54#define MUTE_TIME_MS 2000 55 56#define NUM_TEST_OUTPUTS 5 57 58#define NUM_VOL_CURVE_KNEES 2 59 60// Default minimum length allowed for offloading a compressed track 61// Can be overridden by the audio.offload.min.duration.secs property 62#define OFFLOAD_DEFAULT_MIN_DURATION_SECS 60 63 64#define MAX_MIXER_SAMPLING_RATE 48000 65#define MAX_MIXER_CHANNEL_COUNT 8 66 67// ---------------------------------------------------------------------------- 68// AudioPolicyManager implements audio policy manager behavior common to all platforms. 69// ---------------------------------------------------------------------------- 70 71class AudioPolicyManager: public AudioPolicyInterface 72#ifdef AUDIO_POLICY_TEST 73 , public Thread 74#endif //AUDIO_POLICY_TEST 75{ 76 77public: 78 AudioPolicyManager(AudioPolicyClientInterface *clientInterface); 79 virtual ~AudioPolicyManager(); 80 81 // AudioPolicyInterface 82 virtual status_t setDeviceConnectionState(audio_devices_t device, 83 audio_policy_dev_state_t state, 84 const char *device_address, 85 const char *device_name); 86 virtual audio_policy_dev_state_t getDeviceConnectionState(audio_devices_t device, 87 const char *device_address); 88 virtual void setPhoneState(audio_mode_t state); 89 virtual void setForceUse(audio_policy_force_use_t usage, 90 audio_policy_forced_cfg_t config); 91 virtual audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage); 92 virtual void setSystemProperty(const char* property, const char* value); 93 virtual status_t initCheck(); 94 virtual audio_io_handle_t getOutput(audio_stream_type_t stream, 95 uint32_t samplingRate, 96 audio_format_t format, 97 audio_channel_mask_t channelMask, 98 audio_output_flags_t flags, 99 const audio_offload_info_t *offloadInfo); 100 virtual status_t getOutputForAttr(const audio_attributes_t *attr, 101 audio_io_handle_t *output, 102 audio_session_t session, 103 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 startOutput(audio_io_handle_t output, 110 audio_stream_type_t stream, 111 audio_session_t session); 112 virtual status_t stopOutput(audio_io_handle_t output, 113 audio_stream_type_t stream, 114 audio_session_t session); 115 virtual void releaseOutput(audio_io_handle_t output, 116 audio_stream_type_t stream, 117 audio_session_t session); 118 virtual status_t getInputForAttr(const audio_attributes_t *attr, 119 audio_io_handle_t *input, 120 audio_session_t session, 121 uint32_t samplingRate, 122 audio_format_t format, 123 audio_channel_mask_t channelMask, 124 audio_input_flags_t flags, 125 input_type_t *inputType); 126 127 // indicates to the audio policy manager that the input starts being used. 128 virtual status_t startInput(audio_io_handle_t input, 129 audio_session_t session); 130 131 // indicates to the audio policy manager that the input stops being used. 132 virtual status_t stopInput(audio_io_handle_t input, 133 audio_session_t session); 134 virtual void releaseInput(audio_io_handle_t input, 135 audio_session_t session); 136 virtual void closeAllInputs(); 137 virtual void initStreamVolume(audio_stream_type_t stream, 138 int indexMin, 139 int indexMax); 140 virtual status_t setStreamVolumeIndex(audio_stream_type_t stream, 141 int index, 142 audio_devices_t device); 143 virtual status_t getStreamVolumeIndex(audio_stream_type_t stream, 144 int *index, 145 audio_devices_t device); 146 147 // return the strategy corresponding to a given stream type 148 virtual uint32_t getStrategyForStream(audio_stream_type_t stream); 149 // return the strategy corresponding to the given audio attributes 150 virtual uint32_t getStrategyForAttr(const audio_attributes_t *attr); 151 152 // return the enabled output devices for the given stream type 153 virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream); 154 155 virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc = NULL); 156 virtual status_t registerEffect(const effect_descriptor_t *desc, 157 audio_io_handle_t io, 158 uint32_t strategy, 159 int session, 160 int id); 161 virtual status_t unregisterEffect(int id); 162 virtual status_t setEffectEnabled(int id, bool enabled); 163 164 virtual bool isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 165 // return whether a stream is playing remotely, override to change the definition of 166 // local/remote playback, used for instance by notification manager to not make 167 // media players lose audio focus when not playing locally 168 // For the base implementation, "remotely" means playing during screen mirroring which 169 // uses an output for playback with a non-empty, non "0" address. 170 virtual bool isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 171 virtual bool isSourceActive(audio_source_t source) const; 172 173 virtual status_t dump(int fd); 174 175 virtual bool isOffloadSupported(const audio_offload_info_t& offloadInfo); 176 177 virtual status_t listAudioPorts(audio_port_role_t role, 178 audio_port_type_t type, 179 unsigned int *num_ports, 180 struct audio_port *ports, 181 unsigned int *generation); 182 virtual status_t getAudioPort(struct audio_port *port); 183 virtual status_t createAudioPatch(const struct audio_patch *patch, 184 audio_patch_handle_t *handle, 185 uid_t uid); 186 virtual status_t releaseAudioPatch(audio_patch_handle_t handle, 187 uid_t uid); 188 virtual status_t listAudioPatches(unsigned int *num_patches, 189 struct audio_patch *patches, 190 unsigned int *generation); 191 virtual status_t setAudioPortConfig(const struct audio_port_config *config); 192 virtual void clearAudioPatches(uid_t uid); 193 194 virtual status_t acquireSoundTriggerSession(audio_session_t *session, 195 audio_io_handle_t *ioHandle, 196 audio_devices_t *device); 197 198 virtual status_t releaseSoundTriggerSession(audio_session_t session); 199 200 virtual status_t registerPolicyMixes(Vector<AudioMix> mixes); 201 virtual status_t unregisterPolicyMixes(Vector<AudioMix> mixes); 202 203 // Audio policy configuration file parsing (audio_policy.conf) 204 // TODO candidates to be moved to ConfigParsingUtils 205 void loadHwModule(cnode *root); 206 void loadHwModules(cnode *root); 207 void loadGlobalConfig(cnode *root, const sp<HwModule>& module); 208 status_t loadAudioPolicyConfig(const char *path); 209 void defaultAudioPolicyConfig(void); 210 211 // return the strategy corresponding to a given stream type 212 static routing_strategy getStrategy(audio_stream_type_t stream); 213 214 static uint32_t nextUniqueId(); 215protected: 216 217 class EffectDescriptor : public RefBase 218 { 219 public: 220 221 status_t dump(int fd); 222 223 int mIo; // io the effect is attached to 224 routing_strategy mStrategy; // routing strategy the effect is associated to 225 int mSession; // audio session the effect is on 226 effect_descriptor_t mDesc; // effect descriptor 227 bool mEnabled; // enabled state: CPU load being used or not 228 }; 229 230 void addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc); 231 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 232 233 // return appropriate device for streams handled by the specified strategy according to current 234 // phone state, connected devices... 235 // if fromCache is true, the device is returned from mDeviceForStrategy[], 236 // otherwise it is determine by current state 237 // (device connected,phone state, force use, a2dp output...) 238 // This allows to: 239 // 1 speed up process when the state is stable (when starting or stopping an output) 240 // 2 access to either current device selection (fromCache == true) or 241 // "future" device selection (fromCache == false) when called from a context 242 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 243 // before updateDevicesAndOutputs() is called. 244 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 245 bool fromCache); 246 247 // change the route of the specified output. Returns the number of ms we have slept to 248 // allow new routing to take effect in certain cases. 249 virtual uint32_t setOutputDevice(audio_io_handle_t output, 250 audio_devices_t device, 251 bool force = false, 252 int delayMs = 0, 253 audio_patch_handle_t *patchHandle = NULL, 254 const char* address = NULL); 255 status_t resetOutputDevice(audio_io_handle_t output, 256 int delayMs = 0, 257 audio_patch_handle_t *patchHandle = NULL); 258 status_t setInputDevice(audio_io_handle_t input, 259 audio_devices_t device, 260 bool force = false, 261 audio_patch_handle_t *patchHandle = NULL); 262 status_t resetInputDevice(audio_io_handle_t input, 263 audio_patch_handle_t *patchHandle = NULL); 264 265 // select input device corresponding to requested audio source 266 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 267 268 // return io handle of active input or 0 if no input is active 269 // Only considers inputs from physical devices (e.g. main mic, headset mic) when 270 // ignoreVirtualInputs is true. 271 audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true); 272 273 uint32_t activeInputsCount() const; 274 275 // initialize volume curves for each strategy and device category 276 void initializeVolumeCurves(); 277 278 // compute the actual volume for a given stream according to the requested index and a particular 279 // device 280 virtual float computeVolume(audio_stream_type_t stream, int index, 281 audio_io_handle_t output, audio_devices_t device); 282 283 // check that volume change is permitted, compute and send new volume to audio hardware 284 virtual status_t checkAndSetVolume(audio_stream_type_t stream, int index, 285 audio_io_handle_t output, 286 audio_devices_t device, 287 int delayMs = 0, bool force = false); 288 289 // apply all stream volumes to the specified output and device 290 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 291 292 // Mute or unmute all streams handled by the specified strategy on the specified output 293 void setStrategyMute(routing_strategy strategy, 294 bool on, 295 audio_io_handle_t output, 296 int delayMs = 0, 297 audio_devices_t device = (audio_devices_t)0); 298 299 // Mute or unmute the stream on the specified output 300 void setStreamMute(audio_stream_type_t stream, 301 bool on, 302 audio_io_handle_t output, 303 int delayMs = 0, 304 audio_devices_t device = (audio_devices_t)0); 305 306 // handle special cases for sonification strategy while in call: mute streams or replace by 307 // a special tone in the device used for communication 308 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 309 310 // true if device is in a telephony or VoIP call 311 virtual bool isInCall(); 312 313 // true if given state represents a device in a telephony or VoIP call 314 virtual bool isStateInCall(int state); 315 316 // when a device is connected, checks if an open output can be routed 317 // to this device. If none is open, tries to open one of the available outputs. 318 // Returns an output suitable to this device or 0. 319 // when a device is disconnected, checks if an output is not used any more and 320 // returns its handle if any. 321 // transfers the audio tracks and effects from one output thread to another accordingly. 322 status_t checkOutputsForDevice(const sp<DeviceDescriptor> devDesc, 323 audio_policy_dev_state_t state, 324 SortedVector<audio_io_handle_t>& outputs, 325 const String8 address); 326 327 status_t checkInputsForDevice(audio_devices_t device, 328 audio_policy_dev_state_t state, 329 SortedVector<audio_io_handle_t>& inputs, 330 const String8 address); 331 332 // close an output and its companion duplicating output. 333 void closeOutput(audio_io_handle_t output); 334 335 // close an input. 336 void closeInput(audio_io_handle_t input); 337 338 // checks and if necessary changes outputs used for all strategies. 339 // must be called every time a condition that affects the output choice for a given strategy 340 // changes: connected device, phone state, force use... 341 // Must be called before updateDevicesAndOutputs() 342 void checkOutputForStrategy(routing_strategy strategy); 343 344 // Same as checkOutputForStrategy() but for a all strategies in order of priority 345 void checkOutputForAllStrategies(); 346 347 // manages A2DP output suspend/restore according to phone state and BT SCO usage 348 void checkA2dpSuspend(); 349 350 // returns the A2DP output handle if it is open or 0 otherwise 351 audio_io_handle_t getA2dpOutput(); 352 353 // selects the most appropriate device on output for current state 354 // must be called every time a condition that affects the device choice for a given output is 355 // changed: connected device, phone state, force use, output start, output stop.. 356 // see getDeviceForStrategy() for the use of fromCache parameter 357 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 358 359 // updates cache of device used by all strategies (mDeviceForStrategy[]) 360 // must be called every time a condition that affects the device choice for a given strategy is 361 // changed: connected device, phone state, force use... 362 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 363 // Must be called after checkOutputForAllStrategies() 364 void updateDevicesAndOutputs(); 365 366 // selects the most appropriate device on input for current state 367 audio_devices_t getNewInputDevice(audio_io_handle_t input); 368 369 virtual uint32_t getMaxEffectsCpuLoad(); 370 virtual uint32_t getMaxEffectsMemory(); 371#ifdef AUDIO_POLICY_TEST 372 virtual bool threadLoop(); 373 void exit(); 374 int testOutputIndex(audio_io_handle_t output); 375#endif //AUDIO_POLICY_TEST 376 377 status_t setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled); 378 379 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 380 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs); 381 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 382 SortedVector<audio_io_handle_t>& outputs2); 383 384 // mute/unmute strategies using an incompatible device combination 385 // if muting, wait for the audio in pcm buffer to be drained before proceeding 386 // if unmuting, unmute only after the specified delay 387 // Returns the number of ms waited 388 virtual uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 389 audio_devices_t prevDevice, 390 uint32_t delayMs); 391 392 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 393 audio_output_flags_t flags, 394 audio_format_t format); 395 // samplingRate parameter is an in/out and so may be modified 396 sp<IOProfile> getInputProfile(audio_devices_t device, 397 String8 address, 398 uint32_t& samplingRate, 399 audio_format_t format, 400 audio_channel_mask_t channelMask, 401 audio_input_flags_t flags); 402 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 403 uint32_t samplingRate, 404 audio_format_t format, 405 audio_channel_mask_t channelMask, 406 audio_output_flags_t flags); 407 408 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 409 410 bool isNonOffloadableEffectEnabled(); 411 412 virtual status_t addAudioPatch(audio_patch_handle_t handle, 413 const sp<AudioPatch>& patch); 414 virtual status_t removeAudioPatch(audio_patch_handle_t handle); 415 416 sp<AudioOutputDescriptor> getOutputFromId(audio_port_handle_t id) const; 417 sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const; 418 sp<HwModule> getModuleForDevice(audio_devices_t device) const; 419 sp<HwModule> getModuleFromName(const char *name) const; 420 audio_devices_t availablePrimaryOutputDevices(); 421 audio_devices_t availablePrimaryInputDevices(); 422 423 void updateCallRouting(audio_devices_t rxDevice, int delayMs = 0); 424 425 426 uid_t mUidCached; 427 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 428 audio_io_handle_t mPrimaryOutput; // primary output handle 429 // list of descriptors for outputs currently opened 430 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mOutputs; 431 // copy of mOutputs before setDeviceConnectionState() opens new outputs 432 // reset to mOutputs when updateDevicesAndOutputs() is called. 433 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mPreviousOutputs; 434 DefaultKeyedVector<audio_io_handle_t, sp<AudioInputDescriptor> > mInputs; // list of input descriptors 435 DeviceVector mAvailableOutputDevices; // all available output devices 436 DeviceVector mAvailableInputDevices; // all available input devices 437 int mPhoneState; // current phone state 438 audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT]; // current forced use configuration 439 440 StreamDescriptor mStreams[AUDIO_STREAM_CNT]; // stream descriptors for volume control 441 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 442 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 443 float mLastVoiceVolume; // last voice volume value sent to audio HAL 444 445 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 446 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 447 // Maximum memory allocated to audio effects in KB 448 static const uint32_t MAX_EFFECTS_MEMORY = 512; 449 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 450 uint32_t mTotalEffectsMemory; // current memory used by effects 451 KeyedVector<int, sp<EffectDescriptor> > mEffects; // list of registered audio effects 452 bool mA2dpSuspended; // true if A2DP output is suspended 453 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 454 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 455 // to boost soft sounds, used to adjust volume curves accordingly 456 457 Vector < sp<HwModule> > mHwModules; 458 static volatile int32_t mNextUniqueId; 459 volatile int32_t mAudioPortGeneration; 460 461 DefaultKeyedVector<audio_patch_handle_t, sp<AudioPatch> > mAudioPatches; 462 463 DefaultKeyedVector<audio_session_t, audio_io_handle_t> mSoundTriggerSessions; 464 465 sp<AudioPatch> mCallTxPatch; 466 sp<AudioPatch> mCallRxPatch; 467 468 // for supporting "beacon" streams, i.e. streams that only play on speaker, and never 469 // when something other than STREAM_TTS (a.k.a. "Transmitted Through Speaker") is playing 470 enum { 471 STARTING_OUTPUT, 472 STARTING_BEACON, 473 STOPPING_OUTPUT, 474 STOPPING_BEACON 475 }; 476 uint32_t mBeaconMuteRefCount; // ref count for stream that would mute beacon 477 uint32_t mBeaconPlayingRefCount;// ref count for the playing beacon streams 478 bool mBeaconMuted; // has STREAM_TTS been muted 479 480 // custom mix entry in mPolicyMixes 481 class AudioPolicyMix : public RefBase { 482 public: 483 AudioPolicyMix() {} 484 485 AudioMix mMix; // Audio policy mix descriptor 486 sp<AudioOutputDescriptor> mOutput; // Corresponding output stream 487 }; 488 DefaultKeyedVector<String8, sp<AudioPolicyMix> > mPolicyMixes; // list of registered mixes 489 490 491#ifdef AUDIO_POLICY_TEST 492 Mutex mLock; 493 Condition mWaitWorkCV; 494 495 int mCurOutput; 496 bool mDirectOutput; 497 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 498 int mTestInput; 499 uint32_t mTestDevice; 500 uint32_t mTestSamplingRate; 501 uint32_t mTestFormat; 502 uint32_t mTestChannels; 503 uint32_t mTestLatencyMs; 504#endif //AUDIO_POLICY_TEST 505 506 static bool isVirtualInputDevice(audio_devices_t device); 507 508 uint32_t nextAudioPortGeneration(); 509private: 510 // updates device caching and output for streams that can influence the 511 // routing of notifications 512 void handleNotificationRoutingForStream(audio_stream_type_t stream); 513 static bool deviceDistinguishesOnAddress(audio_devices_t device); 514 // find the outputs on a given output descriptor that have the given address. 515 // to be called on an AudioOutputDescriptor whose supported devices (as defined 516 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 517 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 518 // where addresses are used to distinguish between one connected device and another. 519 void findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/, 520 const audio_devices_t device /*in*/, 521 const String8 address /*in*/, 522 SortedVector<audio_io_handle_t>& outputs /*out*/); 523 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 524 // internal method to return the output handle for the given device and format 525 audio_io_handle_t getOutputForDevice( 526 audio_devices_t device, 527 audio_session_t session, 528 audio_stream_type_t stream, 529 uint32_t samplingRate, 530 audio_format_t format, 531 audio_channel_mask_t channelMask, 532 audio_output_flags_t flags, 533 const audio_offload_info_t *offloadInfo); 534 // internal function to derive a stream type value from audio attributes 535 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 536 // return true if any output is playing anything besides the stream to ignore 537 bool isAnyOutputActive(audio_stream_type_t streamToIgnore); 538 // event is one of STARTING_OUTPUT, STARTING_BEACON, STOPPING_OUTPUT, STOPPING_BEACON 539 // returns 0 if no mute/unmute event happened, the largest latency of the device where 540 // the mute/unmute happened 541 uint32_t handleEventForBeacon(int event); 542 uint32_t setBeaconMute(bool mute); 543 bool isValidAttributes(const audio_attributes_t *paa); 544 545 // select input device corresponding to requested audio source and return associated policy 546 // mix if any. Calls getDeviceForInputSource(). 547 audio_devices_t getDeviceAndMixForInputSource(audio_source_t inputSource, 548 AudioMix **policyMix = NULL); 549 550 // Called by setDeviceConnectionState(). 551 status_t setDeviceConnectionStateInt(audio_devices_t device, 552 audio_policy_dev_state_t state, 553 const char *device_address, 554 const char *device_name); 555 sp<DeviceDescriptor> getDeviceDescriptor(const audio_devices_t device, 556 const char *device_address, 557 const char *device_name); 558}; 559 560}; 561