AudioPolicyManager.h revision a121f90f388343dc48793cbc7eb899aba42e7664
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(int index, bool useInChannelMask); 199 virtual ~AudioGain() {} 200 201 void dump(int fd, int spaces, int index) const; 202 203 void getDefaultConfig(struct audio_gain_config *config); 204 status_t checkConfig(const struct audio_gain_config *config); 205 int mIndex; 206 struct audio_gain mGain; 207 bool mUseInChannelMask; 208 }; 209 210 class AudioPort: public virtual RefBase 211 { 212 public: 213 AudioPort(const String8& name, audio_port_type_t type, 214 audio_port_role_t role, const sp<HwModule>& module); 215 virtual ~AudioPort() {} 216 217 virtual void toAudioPort(struct audio_port *port) const; 218 219 void loadSamplingRates(char *name); 220 void loadFormats(char *name); 221 void loadOutChannels(char *name); 222 void loadInChannels(char *name); 223 224 audio_gain_mode_t loadGainMode(char *name); 225 void loadGain(cnode *root, int index); 226 void loadGains(cnode *root); 227 228 status_t checkSamplingRate(uint32_t samplingRate) const; 229 status_t checkChannelMask(audio_channel_mask_t channelMask) const; 230 status_t checkFormat(audio_format_t format) const; 231 status_t checkGain(const struct audio_gain_config *gainConfig, int index) const; 232 233 void dump(int fd, int spaces) const; 234 235 String8 mName; 236 audio_port_type_t mType; 237 audio_port_role_t mRole; 238 bool mUseInChannelMask; 239 // by convention, "0' in the first entry in mSamplingRates, mChannelMasks or mFormats 240 // indicates the supported parameters should be read from the output stream 241 // after it is opened for the first time 242 Vector <uint32_t> mSamplingRates; // supported sampling rates 243 Vector <audio_channel_mask_t> mChannelMasks; // supported channel masks 244 Vector <audio_format_t> mFormats; // supported audio formats 245 Vector < sp<AudioGain> > mGains; // gain controllers 246 sp<HwModule> mModule; // audio HW module exposing this I/O stream 247 }; 248 249 class AudioPortConfig: public virtual RefBase 250 { 251 public: 252 AudioPortConfig(); 253 virtual ~AudioPortConfig() {} 254 255 status_t applyAudioPortConfig(const struct audio_port_config *config, 256 struct audio_port_config *backupConfig = NULL); 257 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 258 const struct audio_port_config *srcConfig = NULL) const = 0; 259 sp<AudioPort> mAudioPort; 260 uint32_t mSamplingRate; 261 audio_format_t mFormat; 262 audio_channel_mask_t mChannelMask; 263 struct audio_gain_config mGain; 264 }; 265 266 267 class AudioPatch: public RefBase 268 { 269 public: 270 AudioPatch(audio_patch_handle_t handle, 271 const struct audio_patch *patch, uid_t uid) : 272 mHandle(handle), mPatch(*patch), mUid(uid), mAfPatchHandle(0) {} 273 274 audio_patch_handle_t mHandle; 275 struct audio_patch mPatch; 276 uid_t mUid; 277 audio_patch_handle_t mAfPatchHandle; 278 }; 279 280 class DeviceDescriptor: public AudioPort, public AudioPortConfig 281 { 282 public: 283 DeviceDescriptor(const String8& name, audio_devices_t type); 284 285 virtual ~DeviceDescriptor() {} 286 287 bool equals(const sp<DeviceDescriptor>& other) const; 288 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 289 const struct audio_port_config *srcConfig = NULL) const; 290 291 virtual void toAudioPort(struct audio_port *port) const; 292 293 status_t dump(int fd, int spaces, int index) const; 294 295 audio_devices_t mDeviceType; 296 String8 mAddress; 297 audio_channel_mask_t mChannelMask; 298 audio_port_handle_t mId; 299 }; 300 301 class DeviceVector : public SortedVector< sp<DeviceDescriptor> > 302 { 303 public: 304 DeviceVector() : SortedVector(), mDeviceTypes(AUDIO_DEVICE_NONE) {} 305 306 ssize_t add(const sp<DeviceDescriptor>& item); 307 ssize_t remove(const sp<DeviceDescriptor>& item); 308 ssize_t indexOf(const sp<DeviceDescriptor>& item) const; 309 310 audio_devices_t types() const { return mDeviceTypes; } 311 312 void loadDevicesFromType(audio_devices_t types); 313 void loadDevicesFromName(char *name, const DeviceVector& declaredDevices); 314 315 sp<DeviceDescriptor> getDevice(audio_devices_t type, String8 address) const; 316 DeviceVector getDevicesFromType(audio_devices_t types) const; 317 sp<DeviceDescriptor> getDeviceFromId(audio_port_handle_t id) const; 318 sp<DeviceDescriptor> getDeviceFromName(const String8& name) const; 319 320 private: 321 void refreshTypes(); 322 audio_devices_t mDeviceTypes; 323 }; 324 325 // the IOProfile class describes the capabilities of an output or input stream. 326 // It is currently assumed that all combination of listed parameters are supported. 327 // It is used by the policy manager to determine if an output or input is suitable for 328 // a given use case, open/close it accordingly and connect/disconnect audio tracks 329 // to/from it. 330 class IOProfile : public AudioPort 331 { 332 public: 333 IOProfile(const String8& name, audio_port_role_t role, const sp<HwModule>& module); 334 virtual ~IOProfile(); 335 336 bool isCompatibleProfile(audio_devices_t device, 337 uint32_t samplingRate, 338 audio_format_t format, 339 audio_channel_mask_t channelMask, 340 audio_output_flags_t flags) const; 341 342 void dump(int fd); 343 void log(); 344 345 DeviceVector mSupportedDevices; // supported devices 346 // (devices this output can be routed to) 347 audio_output_flags_t mFlags; // attribute flags (e.g primary output, 348 // direct output...). For outputs only. 349 }; 350 351 class HwModule : public RefBase{ 352 public: 353 HwModule(const char *name); 354 ~HwModule(); 355 356 status_t loadOutput(cnode *root); 357 status_t loadInput(cnode *root); 358 status_t loadDevice(cnode *root); 359 360 void dump(int fd); 361 362 const char *const mName; // base name of the audio HW module (primary, a2dp ...) 363 audio_module_handle_t mHandle; 364 Vector < sp<IOProfile> > mOutputProfiles; // output profiles exposed by this module 365 Vector < sp<IOProfile> > mInputProfiles; // input profiles exposed by this module 366 DeviceVector mDeclaredDevices; // devices declared in audio_policy.conf 367 368 }; 369 370 // default volume curve 371 static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManager::VOLCNT]; 372 // default volume curve for media strategy 373 static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 374 // volume curve for media strategy on speakers 375 static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 376 // volume curve for sonification strategy on speakers 377 static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT]; 378 static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 379 static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 380 static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 381 static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 382 static const VolumeCurvePoint sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 383 static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 384 // default volume curves per stream and device category. See initializeVolumeCurves() 385 static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][DEVICE_CATEGORY_CNT]; 386 387 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output 388 // and keep track of the usage of this output by each audio stream type. 389 class AudioOutputDescriptor: public AudioPortConfig 390 { 391 public: 392 AudioOutputDescriptor(const sp<IOProfile>& profile); 393 394 status_t dump(int fd); 395 396 audio_devices_t device() const; 397 void changeRefCount(audio_stream_type_t stream, int delta); 398 399 bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); } 400 audio_devices_t supportedDevices(); 401 uint32_t latency(); 402 bool sharesHwModuleWith(const sp<AudioOutputDescriptor> outputDesc); 403 bool isActive(uint32_t inPastMs = 0) const; 404 bool isStreamActive(audio_stream_type_t stream, 405 uint32_t inPastMs = 0, 406 nsecs_t sysTime = 0) const; 407 bool isStrategyActive(routing_strategy strategy, 408 uint32_t inPastMs = 0, 409 nsecs_t sysTime = 0) const; 410 411 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 412 const struct audio_port_config *srcConfig = NULL) const; 413 void toAudioPort(struct audio_port *port) const; 414 415 audio_port_handle_t mId; 416 audio_io_handle_t mIoHandle; // output handle 417 uint32_t mLatency; // 418 audio_output_flags_t mFlags; // 419 audio_devices_t mDevice; // current device this output is routed to 420 audio_patch_handle_t mPatchHandle; 421 uint32_t mRefCount[AUDIO_STREAM_CNT]; // number of streams of each type using this output 422 nsecs_t mStopTime[AUDIO_STREAM_CNT]; 423 sp<AudioOutputDescriptor> mOutput1; // used by duplicated outputs: first output 424 sp<AudioOutputDescriptor> mOutput2; // used by duplicated outputs: second output 425 float mCurVolume[AUDIO_STREAM_CNT]; // current stream volume 426 int mMuteCount[AUDIO_STREAM_CNT]; // mute request counter 427 const sp<IOProfile> mProfile; // I/O profile this output derives from 428 bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible 429 // device selection. See checkDeviceMuteStrategies() 430 uint32_t mDirectOpenCount; // number of clients using this output (direct outputs only) 431 }; 432 433 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 434 // and keep track of the usage of this input. 435 class AudioInputDescriptor: public AudioPortConfig 436 { 437 public: 438 AudioInputDescriptor(const sp<IOProfile>& profile); 439 440 status_t dump(int fd); 441 442 audio_port_handle_t mId; 443 audio_io_handle_t mIoHandle; // input handle 444 audio_devices_t mDevice; // current device this input is routed to 445 audio_patch_handle_t mPatchHandle; 446 uint32_t mRefCount; // number of AudioRecord clients using this output 447 audio_source_t mInputSource; // input source selected by application (mediarecorder.h) 448 const sp<IOProfile> mProfile; // I/O profile this output derives from 449 450 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 451 const struct audio_port_config *srcConfig = NULL) const; 452 void toAudioPort(struct audio_port *port) const; 453 }; 454 455 // stream descriptor used for volume control 456 class StreamDescriptor 457 { 458 public: 459 StreamDescriptor(); 460 461 int getVolumeIndex(audio_devices_t device); 462 void dump(int fd); 463 464 int mIndexMin; // min volume index 465 int mIndexMax; // max volume index 466 KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device 467 bool mCanBeMuted; // true is the stream can be muted 468 469 const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT]; 470 }; 471 472 // stream descriptor used for volume control 473 class EffectDescriptor : public RefBase 474 { 475 public: 476 477 status_t dump(int fd); 478 479 int mIo; // io the effect is attached to 480 routing_strategy mStrategy; // routing strategy the effect is associated to 481 int mSession; // audio session the effect is on 482 effect_descriptor_t mDesc; // effect descriptor 483 bool mEnabled; // enabled state: CPU load being used or not 484 }; 485 486 void addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc); 487 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 488 489 // return the strategy corresponding to a given stream type 490 static routing_strategy getStrategy(audio_stream_type_t stream); 491 492 // return appropriate device for streams handled by the specified strategy according to current 493 // phone state, connected devices... 494 // if fromCache is true, the device is returned from mDeviceForStrategy[], 495 // otherwise it is determine by current state 496 // (device connected,phone state, force use, a2dp output...) 497 // This allows to: 498 // 1 speed up process when the state is stable (when starting or stopping an output) 499 // 2 access to either current device selection (fromCache == true) or 500 // "future" device selection (fromCache == false) when called from a context 501 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 502 // before updateDevicesAndOutputs() is called. 503 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 504 bool fromCache); 505 506 // change the route of the specified output. Returns the number of ms we have slept to 507 // allow new routing to take effect in certain cases. 508 uint32_t setOutputDevice(audio_io_handle_t output, 509 audio_devices_t device, 510 bool force = false, 511 int delayMs = 0, 512 audio_patch_handle_t *patchHandle = NULL); 513 status_t resetOutputDevice(audio_io_handle_t output, 514 int delayMs = 0, 515 audio_patch_handle_t *patchHandle = NULL); 516 status_t setInputDevice(audio_io_handle_t input, 517 audio_devices_t device, 518 bool force = false, 519 audio_patch_handle_t *patchHandle = NULL); 520 status_t resetInputDevice(audio_io_handle_t input, 521 audio_patch_handle_t *patchHandle = NULL); 522 523 // select input device corresponding to requested audio source 524 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 525 526 // return io handle of active input or 0 if no input is active 527 // Only considers inputs from physical devices (e.g. main mic, headset mic) when 528 // ignoreVirtualInputs is true. 529 audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true); 530 531 // initialize volume curves for each strategy and device category 532 void initializeVolumeCurves(); 533 534 // compute the actual volume for a given stream according to the requested index and a particular 535 // device 536 virtual float computeVolume(audio_stream_type_t stream, int index, 537 audio_io_handle_t output, audio_devices_t device); 538 539 // check that volume change is permitted, compute and send new volume to audio hardware 540 status_t checkAndSetVolume(audio_stream_type_t stream, int index, audio_io_handle_t output, 541 audio_devices_t device, int delayMs = 0, bool force = false); 542 543 // apply all stream volumes to the specified output and device 544 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 545 546 // Mute or unmute all streams handled by the specified strategy on the specified output 547 void setStrategyMute(routing_strategy strategy, 548 bool on, 549 audio_io_handle_t output, 550 int delayMs = 0, 551 audio_devices_t device = (audio_devices_t)0); 552 553 // Mute or unmute the stream on the specified output 554 void setStreamMute(audio_stream_type_t stream, 555 bool on, 556 audio_io_handle_t output, 557 int delayMs = 0, 558 audio_devices_t device = (audio_devices_t)0); 559 560 // handle special cases for sonification strategy while in call: mute streams or replace by 561 // a special tone in the device used for communication 562 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 563 564 // true if device is in a telephony or VoIP call 565 virtual bool isInCall(); 566 567 // true if given state represents a device in a telephony or VoIP call 568 virtual bool isStateInCall(int state); 569 570 // when a device is connected, checks if an open output can be routed 571 // to this device. If none is open, tries to open one of the available outputs. 572 // Returns an output suitable to this device or 0. 573 // when a device is disconnected, checks if an output is not used any more and 574 // returns its handle if any. 575 // transfers the audio tracks and effects from one output thread to another accordingly. 576 status_t checkOutputsForDevice(audio_devices_t device, 577 audio_policy_dev_state_t state, 578 SortedVector<audio_io_handle_t>& outputs, 579 const String8 address); 580 581 status_t checkInputsForDevice(audio_devices_t device, 582 audio_policy_dev_state_t state, 583 SortedVector<audio_io_handle_t>& inputs, 584 const String8 address); 585 586 // close an output and its companion duplicating output. 587 void closeOutput(audio_io_handle_t output); 588 589 // checks and if necessary changes outputs used for all strategies. 590 // must be called every time a condition that affects the output choice for a given strategy 591 // changes: connected device, phone state, force use... 592 // Must be called before updateDevicesAndOutputs() 593 void checkOutputForStrategy(routing_strategy strategy); 594 595 // Same as checkOutputForStrategy() but for a all strategies in order of priority 596 void checkOutputForAllStrategies(); 597 598 // manages A2DP output suspend/restore according to phone state and BT SCO usage 599 void checkA2dpSuspend(); 600 601 // returns the A2DP output handle if it is open or 0 otherwise 602 audio_io_handle_t getA2dpOutput(); 603 604 // selects the most appropriate device on output for current state 605 // must be called every time a condition that affects the device choice for a given output is 606 // changed: connected device, phone state, force use, output start, output stop.. 607 // see getDeviceForStrategy() for the use of fromCache parameter 608 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 609 610 // updates cache of device used by all strategies (mDeviceForStrategy[]) 611 // must be called every time a condition that affects the device choice for a given strategy is 612 // changed: connected device, phone state, force use... 613 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 614 // Must be called after checkOutputForAllStrategies() 615 void updateDevicesAndOutputs(); 616 617 // selects the most appropriate device on input for current state 618 audio_devices_t getNewInputDevice(audio_io_handle_t input); 619 620 virtual uint32_t getMaxEffectsCpuLoad(); 621 virtual uint32_t getMaxEffectsMemory(); 622#ifdef AUDIO_POLICY_TEST 623 virtual bool threadLoop(); 624 void exit(); 625 int testOutputIndex(audio_io_handle_t output); 626#endif //AUDIO_POLICY_TEST 627 628 status_t setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled); 629 630 // returns the category the device belongs to with regard to volume curve management 631 static device_category getDeviceCategory(audio_devices_t device); 632 633 // extract one device relevant for volume control from multiple device selection 634 static audio_devices_t getDeviceForVolume(audio_devices_t device); 635 636 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 637 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs); 638 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 639 SortedVector<audio_io_handle_t>& outputs2); 640 641 // mute/unmute strategies using an incompatible device combination 642 // if muting, wait for the audio in pcm buffer to be drained before proceeding 643 // if unmuting, unmute only after the specified delay 644 // Returns the number of ms waited 645 uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 646 audio_devices_t prevDevice, 647 uint32_t delayMs); 648 649 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 650 audio_output_flags_t flags); 651 sp<IOProfile> getInputProfile(audio_devices_t device, 652 uint32_t samplingRate, 653 audio_format_t format, 654 audio_channel_mask_t channelMask); 655 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 656 uint32_t samplingRate, 657 audio_format_t format, 658 audio_channel_mask_t channelMask, 659 audio_output_flags_t flags); 660 661 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 662 663 bool isNonOffloadableEffectEnabled(); 664 665 status_t addAudioPatch(audio_patch_handle_t handle, 666 const sp<AudioPatch>& patch); 667 status_t removeAudioPatch(audio_patch_handle_t handle); 668 669 sp<AudioOutputDescriptor> getOutputFromId(audio_port_handle_t id) const; 670 sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const; 671 sp<HwModule> getModuleForDevice(audio_devices_t device) const; 672 sp<HwModule> getModuleFromName(const char *name) const; 673 // 674 // Audio policy configuration file parsing (audio_policy.conf) 675 // 676 static uint32_t stringToEnum(const struct StringToEnum *table, 677 size_t size, 678 const char *name); 679 static const char *enumToString(const struct StringToEnum *table, 680 size_t size, 681 uint32_t value); 682 static bool stringToBool(const char *value); 683 static audio_output_flags_t parseFlagNames(char *name); 684 static audio_devices_t parseDeviceNames(char *name); 685 void loadHwModule(cnode *root); 686 void loadHwModules(cnode *root); 687 void loadGlobalConfig(cnode *root, const sp<HwModule>& module); 688 status_t loadAudioPolicyConfig(const char *path); 689 void defaultAudioPolicyConfig(void); 690 691 692 uid_t mUidCached; 693 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 694 audio_io_handle_t mPrimaryOutput; // primary output handle 695 // list of descriptors for outputs currently opened 696 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mOutputs; 697 // copy of mOutputs before setDeviceConnectionState() opens new outputs 698 // reset to mOutputs when updateDevicesAndOutputs() is called. 699 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mPreviousOutputs; 700 DefaultKeyedVector<audio_io_handle_t, sp<AudioInputDescriptor> > mInputs; // list of input descriptors 701 DeviceVector mAvailableOutputDevices; // all available output devices 702 DeviceVector mAvailableInputDevices; // all available input devices 703 int mPhoneState; // current phone state 704 audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT]; // current forced use configuration 705 706 StreamDescriptor mStreams[AUDIO_STREAM_CNT]; // stream descriptors for volume control 707 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 708 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 709 float mLastVoiceVolume; // last voice volume value sent to audio HAL 710 711 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 712 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 713 // Maximum memory allocated to audio effects in KB 714 static const uint32_t MAX_EFFECTS_MEMORY = 512; 715 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 716 uint32_t mTotalEffectsMemory; // current memory used by effects 717 KeyedVector<int, sp<EffectDescriptor> > mEffects; // list of registered audio effects 718 bool mA2dpSuspended; // true if A2DP output is suspended 719 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 720 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 721 // to boost soft sounds, used to adjust volume curves accordingly 722 723 Vector < sp<HwModule> > mHwModules; 724 volatile int32_t mNextUniqueId; 725 volatile int32_t mAudioPortGeneration; 726 727 DefaultKeyedVector<audio_patch_handle_t, sp<AudioPatch> > mAudioPatches; 728 729#ifdef AUDIO_POLICY_TEST 730 Mutex mLock; 731 Condition mWaitWorkCV; 732 733 int mCurOutput; 734 bool mDirectOutput; 735 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 736 int mTestInput; 737 uint32_t mTestDevice; 738 uint32_t mTestSamplingRate; 739 uint32_t mTestFormat; 740 uint32_t mTestChannels; 741 uint32_t mTestLatencyMs; 742#endif //AUDIO_POLICY_TEST 743 744private: 745 static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, 746 int indexInUi); 747 // updates device caching and output for streams that can influence the 748 // routing of notifications 749 void handleNotificationRoutingForStream(audio_stream_type_t stream); 750 static bool isVirtualInputDevice(audio_devices_t device); 751 uint32_t nextUniqueId(); 752 uint32_t nextAudioPortGeneration(); 753 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 754 // converts device address to string sent to audio HAL via setParameters 755 static String8 addressToParameter(audio_devices_t device, const String8 address); 756}; 757 758}; 759