AudioPolicyManager.h revision 1f2f2230900581e5de9cf01a883e5d9338f0df94
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 "AudioPolicyInterface.h" 27 28 29namespace android { 30 31// ---------------------------------------------------------------------------- 32 33// Attenuation applied to STRATEGY_SONIFICATION streams when a headset is connected: 6dB 34#define SONIFICATION_HEADSET_VOLUME_FACTOR 0.5 35// Min volume for STRATEGY_SONIFICATION streams when limited by music volume: -36dB 36#define SONIFICATION_HEADSET_VOLUME_MIN 0.016 37// Time in milliseconds during which we consider that music is still active after a music 38// track was stopped - see computeVolume() 39#define SONIFICATION_HEADSET_MUSIC_DELAY 5000 40// Time in milliseconds after media stopped playing during which we consider that the 41// sonification should be as unobtrusive as during the time media was playing. 42#define SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY 5000 43// Time in milliseconds during witch some streams are muted while the audio path 44// is switched 45#define MUTE_TIME_MS 2000 46 47#define NUM_TEST_OUTPUTS 5 48 49#define NUM_VOL_CURVE_KNEES 2 50 51// Default minimum length allowed for offloading a compressed track 52// Can be overridden by the audio.offload.min.duration.secs property 53#define OFFLOAD_DEFAULT_MIN_DURATION_SECS 60 54 55// ---------------------------------------------------------------------------- 56// AudioPolicyManager implements audio policy manager behavior common to all platforms. 57// ---------------------------------------------------------------------------- 58 59class AudioPolicyManager: public AudioPolicyInterface 60#ifdef AUDIO_POLICY_TEST 61 , public Thread 62#endif //AUDIO_POLICY_TEST 63{ 64 65public: 66 AudioPolicyManager(AudioPolicyClientInterface *clientInterface); 67 virtual ~AudioPolicyManager(); 68 69 // AudioPolicyInterface 70 virtual status_t setDeviceConnectionState(audio_devices_t device, 71 audio_policy_dev_state_t state, 72 const char *device_address); 73 virtual audio_policy_dev_state_t getDeviceConnectionState(audio_devices_t device, 74 const char *device_address); 75 virtual void setPhoneState(audio_mode_t state); 76 virtual void setForceUse(audio_policy_force_use_t usage, 77 audio_policy_forced_cfg_t config); 78 virtual audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage); 79 virtual void setSystemProperty(const char* property, const char* value); 80 virtual status_t initCheck(); 81 virtual audio_io_handle_t getOutput(audio_stream_type_t stream, 82 uint32_t samplingRate, 83 audio_format_t format, 84 audio_channel_mask_t channelMask, 85 audio_output_flags_t flags, 86 const audio_offload_info_t *offloadInfo); 87 virtual status_t startOutput(audio_io_handle_t output, 88 audio_stream_type_t stream, 89 int session = 0); 90 virtual status_t stopOutput(audio_io_handle_t output, 91 audio_stream_type_t stream, 92 int session = 0); 93 virtual void releaseOutput(audio_io_handle_t output); 94 virtual audio_io_handle_t getInput(audio_source_t inputSource, 95 uint32_t samplingRate, 96 audio_format_t format, 97 audio_channel_mask_t channelMask, 98 audio_in_acoustics_t acoustics); 99 100 // indicates to the audio policy manager that the input starts being used. 101 virtual status_t startInput(audio_io_handle_t input); 102 103 // indicates to the audio policy manager that the input stops being used. 104 virtual status_t stopInput(audio_io_handle_t input); 105 virtual void releaseInput(audio_io_handle_t input); 106 virtual void closeAllInputs(); 107 virtual void initStreamVolume(audio_stream_type_t stream, 108 int indexMin, 109 int indexMax); 110 virtual status_t setStreamVolumeIndex(audio_stream_type_t stream, 111 int index, 112 audio_devices_t device); 113 virtual status_t getStreamVolumeIndex(audio_stream_type_t stream, 114 int *index, 115 audio_devices_t device); 116 117 // return the strategy corresponding to a given stream type 118 virtual uint32_t getStrategyForStream(audio_stream_type_t stream); 119 120 // return the enabled output devices for the given stream type 121 virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream); 122 123 virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc = NULL); 124 virtual status_t registerEffect(const effect_descriptor_t *desc, 125 audio_io_handle_t io, 126 uint32_t strategy, 127 int session, 128 int id); 129 virtual status_t unregisterEffect(int id); 130 virtual status_t setEffectEnabled(int id, bool enabled); 131 132 virtual bool isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 133 // return whether a stream is playing remotely, override to change the definition of 134 // local/remote playback, used for instance by notification manager to not make 135 // media players lose audio focus when not playing locally 136 virtual bool isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 137 virtual bool isSourceActive(audio_source_t source) const; 138 139 virtual status_t dump(int fd); 140 141 virtual bool isOffloadSupported(const audio_offload_info_t& offloadInfo); 142 143 virtual status_t listAudioPorts(audio_port_role_t role, 144 audio_port_type_t type, 145 unsigned int *num_ports, 146 struct audio_port *ports, 147 unsigned int *generation); 148 virtual status_t getAudioPort(struct audio_port *port); 149 virtual status_t createAudioPatch(const struct audio_patch *patch, 150 audio_patch_handle_t *handle, 151 uid_t uid); 152 virtual status_t releaseAudioPatch(audio_patch_handle_t handle, 153 uid_t uid); 154 virtual status_t listAudioPatches(unsigned int *num_patches, 155 struct audio_patch *patches, 156 unsigned int *generation); 157 virtual status_t setAudioPortConfig(const struct audio_port_config *config); 158 virtual void clearAudioPatches(uid_t uid); 159 160protected: 161 162 enum routing_strategy { 163 STRATEGY_MEDIA, 164 STRATEGY_PHONE, 165 STRATEGY_SONIFICATION, 166 STRATEGY_SONIFICATION_RESPECTFUL, 167 STRATEGY_DTMF, 168 STRATEGY_ENFORCED_AUDIBLE, 169 NUM_STRATEGIES 170 }; 171 172 // 4 points to define the volume attenuation curve, each characterized by the volume 173 // index (from 0 to 100) at which they apply, and the attenuation in dB at that index. 174 // we use 100 steps to avoid rounding errors when computing the volume in volIndexToAmpl() 175 176 enum { VOLMIN = 0, VOLKNEE1 = 1, VOLKNEE2 = 2, VOLMAX = 3, VOLCNT = 4}; 177 178 class VolumeCurvePoint 179 { 180 public: 181 int mIndex; 182 float mDBAttenuation; 183 }; 184 185 // device categories used for volume curve management. 186 enum device_category { 187 DEVICE_CATEGORY_HEADSET, 188 DEVICE_CATEGORY_SPEAKER, 189 DEVICE_CATEGORY_EARPIECE, 190 DEVICE_CATEGORY_CNT 191 }; 192 193 class HwModule; 194 195 class AudioGain: public RefBase 196 { 197 public: 198 AudioGain(); 199 virtual ~AudioGain() {} 200 201 void dump(int fd, int spaces, int index) const; 202 203 struct audio_gain mGain; 204 }; 205 206 class AudioPort: public virtual RefBase 207 { 208 public: 209 AudioPort(const String8& name, audio_port_type_t type, 210 audio_port_role_t role, const sp<HwModule>& module) : 211 mName(name), mType(type), mRole(role), mModule(module) {} 212 virtual ~AudioPort() {} 213 214 virtual void toAudioPort(struct audio_port *port) const; 215 216 void loadSamplingRates(char *name); 217 void loadFormats(char *name); 218 void loadOutChannels(char *name); 219 void loadInChannels(char *name); 220 221 audio_gain_mode_t loadGainMode(char *name); 222 void loadGain(cnode *root); 223 void loadGains(cnode *root); 224 225 void dump(int fd, int spaces) const; 226 227 String8 mName; 228 audio_port_type_t mType; 229 audio_port_role_t mRole; 230 // by convention, "0' in the first entry in mSamplingRates, mChannelMasks or mFormats 231 // indicates the supported parameters should be read from the output stream 232 // after it is opened for the first time 233 Vector <uint32_t> mSamplingRates; // supported sampling rates 234 Vector <audio_channel_mask_t> mChannelMasks; // supported channel masks 235 Vector <audio_format_t> mFormats; // supported audio formats 236 Vector < sp<AudioGain> > mGains; // gain controllers 237 sp<HwModule> mModule; // audio HW module exposing this I/O stream 238 }; 239 240 class AudioPortConfig: public virtual RefBase 241 { 242 public: 243 AudioPortConfig(); 244 virtual ~AudioPortConfig() {} 245 246 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 247 const struct audio_port_config *srcConfig = NULL) const = 0; 248 sp<AudioPort> mAudioPort; 249 uint32_t mSamplingRate; 250 audio_format_t mFormat; 251 audio_channel_mask_t mChannelMask; 252 struct audio_gain_config mGain; 253 }; 254 255 256 class AudioPatch: public RefBase 257 { 258 public: 259 AudioPatch(audio_patch_handle_t handle, 260 const struct audio_patch *patch, uid_t uid) : 261 mHandle(handle), mPatch(*patch), mUid(uid), mAfPatchHandle(0) {} 262 263 audio_patch_handle_t mHandle; 264 struct audio_patch mPatch; 265 uid_t mUid; 266 audio_patch_handle_t mAfPatchHandle; 267 }; 268 269 class DeviceDescriptor: public AudioPort, public AudioPortConfig 270 { 271 public: 272 DeviceDescriptor(const String8& name, audio_devices_t type); 273 274 virtual ~DeviceDescriptor() {} 275 276 bool equals(const sp<DeviceDescriptor>& other) const; 277 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 278 const struct audio_port_config *srcConfig = NULL) const; 279 280 virtual void toAudioPort(struct audio_port *port) const; 281 282 status_t dump(int fd, int spaces, int index) const; 283 284 audio_devices_t mDeviceType; 285 String8 mAddress; 286 audio_channel_mask_t mChannelMask; 287 audio_port_handle_t mId; 288 }; 289 290 class DeviceVector : public SortedVector< sp<DeviceDescriptor> > 291 { 292 public: 293 DeviceVector() : SortedVector(), mDeviceTypes(AUDIO_DEVICE_NONE) {} 294 295 ssize_t add(const sp<DeviceDescriptor>& item); 296 ssize_t remove(const sp<DeviceDescriptor>& item); 297 ssize_t indexOf(const sp<DeviceDescriptor>& item) const; 298 299 audio_devices_t types() const { return mDeviceTypes; } 300 301 void loadDevicesFromType(audio_devices_t types); 302 void loadDevicesFromName(char *name, const DeviceVector& declaredDevices); 303 304 sp<DeviceDescriptor> getDevice(audio_devices_t type, String8 address) const; 305 DeviceVector getDevicesFromType(audio_devices_t types) const; 306 sp<DeviceDescriptor> getDeviceFromId(audio_port_handle_t id) const; 307 sp<DeviceDescriptor> getDeviceFromName(const String8& name) const; 308 309 private: 310 void refreshTypes(); 311 audio_devices_t mDeviceTypes; 312 }; 313 314 // the IOProfile class describes the capabilities of an output or input stream. 315 // It is currently assumed that all combination of listed parameters are supported. 316 // It is used by the policy manager to determine if an output or input is suitable for 317 // a given use case, open/close it accordingly and connect/disconnect audio tracks 318 // to/from it. 319 class IOProfile : public AudioPort 320 { 321 public: 322 IOProfile(const String8& name, audio_port_role_t role, const sp<HwModule>& module); 323 virtual ~IOProfile(); 324 325 bool isCompatibleProfile(audio_devices_t device, 326 uint32_t samplingRate, 327 audio_format_t format, 328 audio_channel_mask_t channelMask, 329 audio_output_flags_t flags) const; 330 331 void dump(int fd); 332 void log(); 333 334 DeviceVector mSupportedDevices; // supported devices 335 // (devices this output can be routed to) 336 audio_output_flags_t mFlags; // attribute flags (e.g primary output, 337 // direct output...). For outputs only. 338 }; 339 340 class HwModule : public RefBase{ 341 public: 342 HwModule(const char *name); 343 ~HwModule(); 344 345 status_t loadOutput(cnode *root); 346 status_t loadInput(cnode *root); 347 status_t loadDevice(cnode *root); 348 349 void dump(int fd); 350 351 const char *const mName; // base name of the audio HW module (primary, a2dp ...) 352 audio_module_handle_t mHandle; 353 Vector < sp<IOProfile> > mOutputProfiles; // output profiles exposed by this module 354 Vector < sp<IOProfile> > mInputProfiles; // input profiles exposed by this module 355 DeviceVector mDeclaredDevices; // devices declared in audio_policy.conf 356 357 }; 358 359 // default volume curve 360 static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManager::VOLCNT]; 361 // default volume curve for media strategy 362 static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 363 // volume curve for media strategy on speakers 364 static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 365 // volume curve for sonification strategy on speakers 366 static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT]; 367 static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 368 static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 369 static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 370 static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 371 static const VolumeCurvePoint sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 372 static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 373 // default volume curves per stream and device category. See initializeVolumeCurves() 374 static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][DEVICE_CATEGORY_CNT]; 375 376 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output 377 // and keep track of the usage of this output by each audio stream type. 378 class AudioOutputDescriptor: public AudioPortConfig 379 { 380 public: 381 AudioOutputDescriptor(const sp<IOProfile>& profile); 382 383 status_t dump(int fd); 384 385 audio_devices_t device() const; 386 void changeRefCount(audio_stream_type_t stream, int delta); 387 388 bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); } 389 audio_devices_t supportedDevices(); 390 uint32_t latency(); 391 bool sharesHwModuleWith(const sp<AudioOutputDescriptor> outputDesc); 392 bool isActive(uint32_t inPastMs = 0) const; 393 bool isStreamActive(audio_stream_type_t stream, 394 uint32_t inPastMs = 0, 395 nsecs_t sysTime = 0) const; 396 bool isStrategyActive(routing_strategy strategy, 397 uint32_t inPastMs = 0, 398 nsecs_t sysTime = 0) const; 399 400 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 401 const struct audio_port_config *srcConfig = NULL) const; 402 void toAudioPort(struct audio_port *port) const; 403 404 audio_port_handle_t mId; 405 audio_io_handle_t mIoHandle; // output handle 406 uint32_t mLatency; // 407 audio_output_flags_t mFlags; // 408 audio_devices_t mDevice; // current device this output is routed to 409 audio_patch_handle_t mPatchHandle; 410 uint32_t mRefCount[AUDIO_STREAM_CNT]; // number of streams of each type using this output 411 nsecs_t mStopTime[AUDIO_STREAM_CNT]; 412 sp<AudioOutputDescriptor> mOutput1; // used by duplicated outputs: first output 413 sp<AudioOutputDescriptor> mOutput2; // used by duplicated outputs: second output 414 float mCurVolume[AUDIO_STREAM_CNT]; // current stream volume 415 int mMuteCount[AUDIO_STREAM_CNT]; // mute request counter 416 const sp<IOProfile> mProfile; // I/O profile this output derives from 417 bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible 418 // device selection. See checkDeviceMuteStrategies() 419 uint32_t mDirectOpenCount; // number of clients using this output (direct outputs only) 420 }; 421 422 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 423 // and keep track of the usage of this input. 424 class AudioInputDescriptor: public AudioPortConfig 425 { 426 public: 427 AudioInputDescriptor(const sp<IOProfile>& profile); 428 429 status_t dump(int fd); 430 431 audio_port_handle_t mId; 432 audio_io_handle_t mIoHandle; // input handle 433 audio_devices_t mDevice; // current device this input is routed to 434 audio_patch_handle_t mPatchHandle; 435 uint32_t mRefCount; // number of AudioRecord clients using this output 436 audio_source_t mInputSource; // input source selected by application (mediarecorder.h) 437 const sp<IOProfile> mProfile; // I/O profile this output derives from 438 439 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 440 const struct audio_port_config *srcConfig = NULL) const; 441 void toAudioPort(struct audio_port *port) const; 442 }; 443 444 // stream descriptor used for volume control 445 class StreamDescriptor 446 { 447 public: 448 StreamDescriptor(); 449 450 int getVolumeIndex(audio_devices_t device); 451 void dump(int fd); 452 453 int mIndexMin; // min volume index 454 int mIndexMax; // max volume index 455 KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device 456 bool mCanBeMuted; // true is the stream can be muted 457 458 const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT]; 459 }; 460 461 // stream descriptor used for volume control 462 class EffectDescriptor : public RefBase 463 { 464 public: 465 466 status_t dump(int fd); 467 468 int mIo; // io the effect is attached to 469 routing_strategy mStrategy; // routing strategy the effect is associated to 470 int mSession; // audio session the effect is on 471 effect_descriptor_t mDesc; // effect descriptor 472 bool mEnabled; // enabled state: CPU load being used or not 473 }; 474 475 void addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc); 476 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 477 478 // return the strategy corresponding to a given stream type 479 static routing_strategy getStrategy(audio_stream_type_t stream); 480 481 // return appropriate device for streams handled by the specified strategy according to current 482 // phone state, connected devices... 483 // if fromCache is true, the device is returned from mDeviceForStrategy[], 484 // otherwise it is determine by current state 485 // (device connected,phone state, force use, a2dp output...) 486 // This allows to: 487 // 1 speed up process when the state is stable (when starting or stopping an output) 488 // 2 access to either current device selection (fromCache == true) or 489 // "future" device selection (fromCache == false) when called from a context 490 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 491 // before updateDevicesAndOutputs() is called. 492 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 493 bool fromCache); 494 495 // change the route of the specified output. Returns the number of ms we have slept to 496 // allow new routing to take effect in certain cases. 497 uint32_t setOutputDevice(audio_io_handle_t output, 498 audio_devices_t device, 499 bool force = false, 500 int delayMs = 0, 501 audio_patch_handle_t *patchHandle = NULL); 502 status_t resetOutputDevice(audio_io_handle_t output, 503 int delayMs = 0, 504 audio_patch_handle_t *patchHandle = NULL); 505 status_t setInputDevice(audio_io_handle_t input, 506 audio_devices_t device, 507 bool force = false, 508 audio_patch_handle_t *patchHandle = NULL); 509 status_t resetInputDevice(audio_io_handle_t input, 510 audio_patch_handle_t *patchHandle = NULL); 511 512 // select input device corresponding to requested audio source 513 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 514 515 // return io handle of active input or 0 if no input is active 516 // Only considers inputs from physical devices (e.g. main mic, headset mic) when 517 // ignoreVirtualInputs is true. 518 audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true); 519 520 // initialize volume curves for each strategy and device category 521 void initializeVolumeCurves(); 522 523 // compute the actual volume for a given stream according to the requested index and a particular 524 // device 525 virtual float computeVolume(audio_stream_type_t stream, int index, 526 audio_io_handle_t output, audio_devices_t device); 527 528 // check that volume change is permitted, compute and send new volume to audio hardware 529 status_t checkAndSetVolume(audio_stream_type_t stream, int index, audio_io_handle_t output, 530 audio_devices_t device, int delayMs = 0, bool force = false); 531 532 // apply all stream volumes to the specified output and device 533 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 534 535 // Mute or unmute all streams handled by the specified strategy on the specified output 536 void setStrategyMute(routing_strategy strategy, 537 bool on, 538 audio_io_handle_t output, 539 int delayMs = 0, 540 audio_devices_t device = (audio_devices_t)0); 541 542 // Mute or unmute the stream on the specified output 543 void setStreamMute(audio_stream_type_t stream, 544 bool on, 545 audio_io_handle_t output, 546 int delayMs = 0, 547 audio_devices_t device = (audio_devices_t)0); 548 549 // handle special cases for sonification strategy while in call: mute streams or replace by 550 // a special tone in the device used for communication 551 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 552 553 // true if device is in a telephony or VoIP call 554 virtual bool isInCall(); 555 556 // true if given state represents a device in a telephony or VoIP call 557 virtual bool isStateInCall(int state); 558 559 // when a device is connected, checks if an open output can be routed 560 // to this device. If none is open, tries to open one of the available outputs. 561 // Returns an output suitable to this device or 0. 562 // when a device is disconnected, checks if an output is not used any more and 563 // returns its handle if any. 564 // transfers the audio tracks and effects from one output thread to another accordingly. 565 status_t checkOutputsForDevice(audio_devices_t device, 566 audio_policy_dev_state_t state, 567 SortedVector<audio_io_handle_t>& outputs, 568 const String8 address); 569 570 status_t checkInputsForDevice(audio_devices_t device, 571 audio_policy_dev_state_t state, 572 SortedVector<audio_io_handle_t>& inputs, 573 const String8 address); 574 575 // close an output and its companion duplicating output. 576 void closeOutput(audio_io_handle_t output); 577 578 // checks and if necessary changes outputs used for all strategies. 579 // must be called every time a condition that affects the output choice for a given strategy 580 // changes: connected device, phone state, force use... 581 // Must be called before updateDevicesAndOutputs() 582 void checkOutputForStrategy(routing_strategy strategy); 583 584 // Same as checkOutputForStrategy() but for a all strategies in order of priority 585 void checkOutputForAllStrategies(); 586 587 // manages A2DP output suspend/restore according to phone state and BT SCO usage 588 void checkA2dpSuspend(); 589 590 // returns the A2DP output handle if it is open or 0 otherwise 591 audio_io_handle_t getA2dpOutput(); 592 593 // selects the most appropriate device on output for current state 594 // must be called every time a condition that affects the device choice for a given output is 595 // changed: connected device, phone state, force use, output start, output stop.. 596 // see getDeviceForStrategy() for the use of fromCache parameter 597 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 598 599 // updates cache of device used by all strategies (mDeviceForStrategy[]) 600 // must be called every time a condition that affects the device choice for a given strategy is 601 // changed: connected device, phone state, force use... 602 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 603 // Must be called after checkOutputForAllStrategies() 604 void updateDevicesAndOutputs(); 605 606 // selects the most appropriate device on input for current state 607 audio_devices_t getNewInputDevice(audio_io_handle_t input); 608 609 virtual uint32_t getMaxEffectsCpuLoad(); 610 virtual uint32_t getMaxEffectsMemory(); 611#ifdef AUDIO_POLICY_TEST 612 virtual bool threadLoop(); 613 void exit(); 614 int testOutputIndex(audio_io_handle_t output); 615#endif //AUDIO_POLICY_TEST 616 617 status_t setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled); 618 619 // returns the category the device belongs to with regard to volume curve management 620 static device_category getDeviceCategory(audio_devices_t device); 621 622 // extract one device relevant for volume control from multiple device selection 623 static audio_devices_t getDeviceForVolume(audio_devices_t device); 624 625 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 626 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs); 627 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 628 SortedVector<audio_io_handle_t>& outputs2); 629 630 // mute/unmute strategies using an incompatible device combination 631 // if muting, wait for the audio in pcm buffer to be drained before proceeding 632 // if unmuting, unmute only after the specified delay 633 // Returns the number of ms waited 634 uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 635 audio_devices_t prevDevice, 636 uint32_t delayMs); 637 638 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 639 audio_output_flags_t flags); 640 sp<IOProfile> getInputProfile(audio_devices_t device, 641 uint32_t samplingRate, 642 audio_format_t format, 643 audio_channel_mask_t channelMask); 644 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 645 uint32_t samplingRate, 646 audio_format_t format, 647 audio_channel_mask_t channelMask, 648 audio_output_flags_t flags); 649 650 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 651 652 bool isNonOffloadableEffectEnabled(); 653 654 status_t addAudioPatch(audio_patch_handle_t handle, 655 const sp<AudioPatch>& patch); 656 status_t removeAudioPatch(audio_patch_handle_t handle); 657 658 sp<AudioOutputDescriptor> getOutputFromId(audio_port_handle_t id) const; 659 sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const; 660 sp<HwModule> getModuleForDevice(audio_devices_t device) const; 661 sp<HwModule> getModuleFromName(const char *name) const; 662 // 663 // Audio policy configuration file parsing (audio_policy.conf) 664 // 665 static uint32_t stringToEnum(const struct StringToEnum *table, 666 size_t size, 667 const char *name); 668 static const char *enumToString(const struct StringToEnum *table, 669 size_t size, 670 uint32_t value); 671 static bool stringToBool(const char *value); 672 static audio_output_flags_t parseFlagNames(char *name); 673 static audio_devices_t parseDeviceNames(char *name); 674 void loadHwModule(cnode *root); 675 void loadHwModules(cnode *root); 676 void loadGlobalConfig(cnode *root, const sp<HwModule>& module); 677 status_t loadAudioPolicyConfig(const char *path); 678 void defaultAudioPolicyConfig(void); 679 680 681 uid_t mUidCached; 682 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 683 audio_io_handle_t mPrimaryOutput; // primary output handle 684 // list of descriptors for outputs currently opened 685 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mOutputs; 686 // copy of mOutputs before setDeviceConnectionState() opens new outputs 687 // reset to mOutputs when updateDevicesAndOutputs() is called. 688 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mPreviousOutputs; 689 DefaultKeyedVector<audio_io_handle_t, sp<AudioInputDescriptor> > mInputs; // list of input descriptors 690 DeviceVector mAvailableOutputDevices; // all available output devices 691 DeviceVector mAvailableInputDevices; // all available input devices 692 int mPhoneState; // current phone state 693 audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT]; // current forced use configuration 694 695 StreamDescriptor mStreams[AUDIO_STREAM_CNT]; // stream descriptors for volume control 696 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 697 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 698 float mLastVoiceVolume; // last voice volume value sent to audio HAL 699 700 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 701 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 702 // Maximum memory allocated to audio effects in KB 703 static const uint32_t MAX_EFFECTS_MEMORY = 512; 704 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 705 uint32_t mTotalEffectsMemory; // current memory used by effects 706 KeyedVector<int, sp<EffectDescriptor> > mEffects; // list of registered audio effects 707 bool mA2dpSuspended; // true if A2DP output is suspended 708 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 709 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 710 // to boost soft sounds, used to adjust volume curves accordingly 711 712 Vector < sp<HwModule> > mHwModules; 713 volatile int32_t mNextUniqueId; 714 volatile int32_t mAudioPortGeneration; 715 716 DefaultKeyedVector<audio_patch_handle_t, sp<AudioPatch> > mAudioPatches; 717 718#ifdef AUDIO_POLICY_TEST 719 Mutex mLock; 720 Condition mWaitWorkCV; 721 722 int mCurOutput; 723 bool mDirectOutput; 724 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 725 int mTestInput; 726 uint32_t mTestDevice; 727 uint32_t mTestSamplingRate; 728 uint32_t mTestFormat; 729 uint32_t mTestChannels; 730 uint32_t mTestLatencyMs; 731#endif //AUDIO_POLICY_TEST 732 733private: 734 static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, 735 int indexInUi); 736 // updates device caching and output for streams that can influence the 737 // routing of notifications 738 void handleNotificationRoutingForStream(audio_stream_type_t stream); 739 static bool isVirtualInputDevice(audio_devices_t device); 740 uint32_t nextUniqueId(); 741 uint32_t nextAudioPortGeneration(); 742 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 743 // converts device address to string sent to audio HAL via setParameters 744 static String8 addressToParameter(audio_devices_t device, const String8 address); 745}; 746 747}; 748