AudioPolicyManager.h revision 1afeecb88bea660b2c10b2096be0fd02433303ce
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 RefBase 207 { 208 public: 209 AudioPort(const String8& name, audio_port_type_t type, 210 audio_port_role_t role, 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 HwModule *mModule; // audio HW module exposing this I/O stream 238 }; 239 240 class AudioPatch: public RefBase 241 { 242 public: 243 AudioPatch(audio_patch_handle_t handle, 244 const struct audio_patch *patch, uid_t uid) : 245 mHandle(handle), mPatch(*patch), mUid(uid), mAfPatchHandle(0) {} 246 247 audio_patch_handle_t mHandle; 248 struct audio_patch mPatch; 249 uid_t mUid; 250 audio_patch_handle_t mAfPatchHandle; 251 }; 252 253 class DeviceDescriptor: public AudioPort 254 { 255 public: 256 DeviceDescriptor(const String8& name, audio_devices_t type, String8 address, 257 audio_channel_mask_t channelMask) : 258 AudioPort(name, AUDIO_PORT_TYPE_DEVICE, 259 audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK : 260 AUDIO_PORT_ROLE_SOURCE, 261 NULL), 262 mDeviceType(type), mAddress(address), 263 mChannelMask(channelMask), mId(0) {} 264 265 DeviceDescriptor(String8 name, audio_devices_t type) : 266 AudioPort(name, AUDIO_PORT_TYPE_DEVICE, 267 audio_is_output_device(type) ? AUDIO_PORT_ROLE_SINK : 268 AUDIO_PORT_ROLE_SOURCE, 269 NULL), 270 mDeviceType(type), mAddress(""), 271 mChannelMask(0), mId(0) {} 272 virtual ~DeviceDescriptor() {} 273 274 bool equals(const sp<DeviceDescriptor>& other) const; 275 void toAudioPortConfig(struct audio_port_config *dstConfig, 276 const struct audio_port_config *srcConfig = NULL) const; 277 278 virtual void toAudioPort(struct audio_port *port) const; 279 280 status_t dump(int fd, int spaces, int index) const; 281 282 audio_devices_t mDeviceType; 283 String8 mAddress; 284 audio_channel_mask_t mChannelMask; 285 audio_port_handle_t mId; 286 }; 287 288 class DeviceVector : public SortedVector< sp<DeviceDescriptor> > 289 { 290 public: 291 DeviceVector() : SortedVector(), mDeviceTypes(AUDIO_DEVICE_NONE) {} 292 293 ssize_t add(const sp<DeviceDescriptor>& item); 294 ssize_t remove(const sp<DeviceDescriptor>& item); 295 ssize_t indexOf(const sp<DeviceDescriptor>& item) const; 296 297 audio_devices_t types() const { return mDeviceTypes; } 298 299 void loadDevicesFromType(audio_devices_t types); 300 void loadDevicesFromName(char *name, const DeviceVector& declaredDevices); 301 302 sp<DeviceDescriptor> getDevice(audio_devices_t type, String8 address) const; 303 DeviceVector getDevicesFromType(audio_devices_t types) const; 304 sp<DeviceDescriptor> getDeviceFromId(audio_port_handle_t id) const; 305 sp<DeviceDescriptor> getDeviceFromName(const String8& name) const; 306 307 private: 308 void refreshTypes(); 309 audio_devices_t mDeviceTypes; 310 }; 311 312 // the IOProfile class describes the capabilities of an output or input stream. 313 // It is currently assumed that all combination of listed parameters are supported. 314 // It is used by the policy manager to determine if an output or input is suitable for 315 // a given use case, open/close it accordingly and connect/disconnect audio tracks 316 // to/from it. 317 class IOProfile : public AudioPort 318 { 319 public: 320 IOProfile(const String8& name, audio_port_role_t role, HwModule *module); 321 virtual ~IOProfile(); 322 323 bool isCompatibleProfile(audio_devices_t device, 324 uint32_t samplingRate, 325 audio_format_t format, 326 audio_channel_mask_t channelMask, 327 audio_output_flags_t flags) const; 328 329 void dump(int fd); 330 void log(); 331 332 DeviceVector mSupportedDevices; // supported devices 333 // (devices this output can be routed to) 334 audio_output_flags_t mFlags; // attribute flags (e.g primary output, 335 // direct output...). For outputs only. 336 }; 337 338 class HwModule { 339 public: 340 HwModule(const char *name); 341 ~HwModule(); 342 343 status_t loadOutput(cnode *root); 344 status_t loadInput(cnode *root); 345 status_t loadDevice(cnode *root); 346 347 void dump(int fd); 348 349 const char *const mName; // base name of the audio HW module (primary, a2dp ...) 350 audio_module_handle_t mHandle; 351 Vector < sp<IOProfile> > mOutputProfiles; // output profiles exposed by this module 352 Vector < sp<IOProfile> > mInputProfiles; // input profiles exposed by this module 353 DeviceVector mDeclaredDevices; // devices declared in audio_policy.conf 354 355 }; 356 357 // default volume curve 358 static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManager::VOLCNT]; 359 // default volume curve for media strategy 360 static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 361 // volume curve for media strategy on speakers 362 static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 363 // volume curve for sonification strategy on speakers 364 static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT]; 365 static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 366 static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 367 static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 368 static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 369 static const VolumeCurvePoint sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 370 static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 371 // default volume curves per stream and device category. See initializeVolumeCurves() 372 static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][DEVICE_CATEGORY_CNT]; 373 374 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output 375 // and keep track of the usage of this output by each audio stream type. 376 class AudioOutputDescriptor 377 { 378 public: 379 AudioOutputDescriptor(const sp<IOProfile>& profile); 380 381 status_t dump(int fd); 382 383 audio_devices_t device() const; 384 void changeRefCount(audio_stream_type_t stream, int delta); 385 386 bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); } 387 audio_devices_t supportedDevices(); 388 uint32_t latency(); 389 bool sharesHwModuleWith(const AudioOutputDescriptor *outputDesc); 390 bool isActive(uint32_t inPastMs = 0) const; 391 bool isStreamActive(audio_stream_type_t stream, 392 uint32_t inPastMs = 0, 393 nsecs_t sysTime = 0) const; 394 bool isStrategyActive(routing_strategy strategy, 395 uint32_t inPastMs = 0, 396 nsecs_t sysTime = 0) const; 397 398 void toAudioPortConfig(struct audio_port_config *dstConfig, 399 const struct audio_port_config *srcConfig = NULL) const; 400 void toAudioPort(struct audio_port *port) const; 401 402 audio_port_handle_t mId; 403 audio_io_handle_t mIoHandle; // output handle 404 uint32_t mSamplingRate; // 405 audio_format_t mFormat; // 406 audio_channel_mask_t mChannelMask; // output configuration 407 uint32_t mLatency; // 408 audio_output_flags_t mFlags; // 409 audio_devices_t mDevice; // current device this output is routed to 410 audio_patch_handle_t mPatchHandle; 411 uint32_t mRefCount[AUDIO_STREAM_CNT]; // number of streams of each type using this output 412 nsecs_t mStopTime[AUDIO_STREAM_CNT]; 413 AudioOutputDescriptor *mOutput1; // used by duplicated outputs: first output 414 AudioOutputDescriptor *mOutput2; // used by duplicated outputs: second output 415 float mCurVolume[AUDIO_STREAM_CNT]; // current stream volume 416 int mMuteCount[AUDIO_STREAM_CNT]; // mute request counter 417 const sp<IOProfile> mProfile; // I/O profile this output derives from 418 bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible 419 // device selection. See checkDeviceMuteStrategies() 420 uint32_t mDirectOpenCount; // number of clients using this output (direct outputs only) 421 }; 422 423 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 424 // and keep track of the usage of this input. 425 class AudioInputDescriptor 426 { 427 public: 428 AudioInputDescriptor(const sp<IOProfile>& profile); 429 430 status_t dump(int fd); 431 432 audio_port_handle_t mId; 433 audio_io_handle_t mIoHandle; // input handle 434 uint32_t mSamplingRate; // 435 audio_format_t mFormat; // input configuration 436 audio_channel_mask_t mChannelMask; // 437 audio_devices_t mDevice; // current device this input is routed to 438 audio_patch_handle_t mPatchHandle; 439 uint32_t mRefCount; // number of AudioRecord clients using this output 440 audio_source_t mInputSource; // input source selected by application (mediarecorder.h) 441 const sp<IOProfile> mProfile; // I/O profile this output derives from 442 443 void toAudioPortConfig(struct audio_port_config *dstConfig, 444 const struct audio_port_config *srcConfig = NULL) const; 445 void toAudioPort(struct audio_port *port) const; 446 }; 447 448 // stream descriptor used for volume control 449 class StreamDescriptor 450 { 451 public: 452 StreamDescriptor(); 453 454 int getVolumeIndex(audio_devices_t device); 455 void dump(int fd); 456 457 int mIndexMin; // min volume index 458 int mIndexMax; // max volume index 459 KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device 460 bool mCanBeMuted; // true is the stream can be muted 461 462 const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT]; 463 }; 464 465 // stream descriptor used for volume control 466 class EffectDescriptor 467 { 468 public: 469 470 status_t dump(int fd); 471 472 int mIo; // io the effect is attached to 473 routing_strategy mStrategy; // routing strategy the effect is associated to 474 int mSession; // audio session the effect is on 475 effect_descriptor_t mDesc; // effect descriptor 476 bool mEnabled; // enabled state: CPU load being used or not 477 }; 478 479 void addOutput(audio_io_handle_t output, AudioOutputDescriptor *outputDesc); 480 void addInput(audio_io_handle_t input, AudioInputDescriptor *inputDesc); 481 482 // return the strategy corresponding to a given stream type 483 static routing_strategy getStrategy(audio_stream_type_t stream); 484 485 // return appropriate device for streams handled by the specified strategy according to current 486 // phone state, connected devices... 487 // if fromCache is true, the device is returned from mDeviceForStrategy[], 488 // otherwise it is determine by current state 489 // (device connected,phone state, force use, a2dp output...) 490 // This allows to: 491 // 1 speed up process when the state is stable (when starting or stopping an output) 492 // 2 access to either current device selection (fromCache == true) or 493 // "future" device selection (fromCache == false) when called from a context 494 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 495 // before updateDevicesAndOutputs() is called. 496 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 497 bool fromCache); 498 499 // change the route of the specified output. Returns the number of ms we have slept to 500 // allow new routing to take effect in certain cases. 501 uint32_t setOutputDevice(audio_io_handle_t output, 502 audio_devices_t device, 503 bool force = false, 504 int delayMs = 0, 505 audio_patch_handle_t *patchHandle = NULL); 506 status_t resetOutputDevice(audio_io_handle_t output, 507 int delayMs = 0, 508 audio_patch_handle_t *patchHandle = NULL); 509 status_t setInputDevice(audio_io_handle_t input, 510 audio_devices_t device, 511 bool force = false, 512 audio_patch_handle_t *patchHandle = NULL); 513 status_t resetInputDevice(audio_io_handle_t input, 514 audio_patch_handle_t *patchHandle = NULL); 515 516 // select input device corresponding to requested audio source 517 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 518 519 // return io handle of active input or 0 if no input is active 520 // Only considers inputs from physical devices (e.g. main mic, headset mic) when 521 // ignoreVirtualInputs is true. 522 audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true); 523 524 // initialize volume curves for each strategy and device category 525 void initializeVolumeCurves(); 526 527 // compute the actual volume for a given stream according to the requested index and a particular 528 // device 529 virtual float computeVolume(audio_stream_type_t stream, int index, 530 audio_io_handle_t output, audio_devices_t device); 531 532 // check that volume change is permitted, compute and send new volume to audio hardware 533 status_t checkAndSetVolume(audio_stream_type_t stream, int index, audio_io_handle_t output, 534 audio_devices_t device, int delayMs = 0, bool force = false); 535 536 // apply all stream volumes to the specified output and device 537 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 538 539 // Mute or unmute all streams handled by the specified strategy on the specified output 540 void setStrategyMute(routing_strategy strategy, 541 bool on, 542 audio_io_handle_t output, 543 int delayMs = 0, 544 audio_devices_t device = (audio_devices_t)0); 545 546 // Mute or unmute the stream on the specified output 547 void setStreamMute(audio_stream_type_t stream, 548 bool on, 549 audio_io_handle_t output, 550 int delayMs = 0, 551 audio_devices_t device = (audio_devices_t)0); 552 553 // handle special cases for sonification strategy while in call: mute streams or replace by 554 // a special tone in the device used for communication 555 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 556 557 // true if device is in a telephony or VoIP call 558 virtual bool isInCall(); 559 560 // true if given state represents a device in a telephony or VoIP call 561 virtual bool isStateInCall(int state); 562 563 // when a device is connected, checks if an open output can be routed 564 // to this device. If none is open, tries to open one of the available outputs. 565 // Returns an output suitable to this device or 0. 566 // when a device is disconnected, checks if an output is not used any more and 567 // returns its handle if any. 568 // transfers the audio tracks and effects from one output thread to another accordingly. 569 status_t checkOutputsForDevice(audio_devices_t device, 570 audio_policy_dev_state_t state, 571 SortedVector<audio_io_handle_t>& outputs, 572 const String8 address); 573 574 status_t checkInputsForDevice(audio_devices_t device, 575 audio_policy_dev_state_t state, 576 SortedVector<audio_io_handle_t>& inputs, 577 const String8 address); 578 579 // close an output and its companion duplicating output. 580 void closeOutput(audio_io_handle_t output); 581 582 // checks and if necessary changes outputs used for all strategies. 583 // must be called every time a condition that affects the output choice for a given strategy 584 // changes: connected device, phone state, force use... 585 // Must be called before updateDevicesAndOutputs() 586 void checkOutputForStrategy(routing_strategy strategy); 587 588 // Same as checkOutputForStrategy() but for a all strategies in order of priority 589 void checkOutputForAllStrategies(); 590 591 // manages A2DP output suspend/restore according to phone state and BT SCO usage 592 void checkA2dpSuspend(); 593 594 // returns the A2DP output handle if it is open or 0 otherwise 595 audio_io_handle_t getA2dpOutput(); 596 597 // selects the most appropriate device on output for current state 598 // must be called every time a condition that affects the device choice for a given output is 599 // changed: connected device, phone state, force use, output start, output stop.. 600 // see getDeviceForStrategy() for the use of fromCache parameter 601 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 602 603 // updates cache of device used by all strategies (mDeviceForStrategy[]) 604 // must be called every time a condition that affects the device choice for a given strategy is 605 // changed: connected device, phone state, force use... 606 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 607 // Must be called after checkOutputForAllStrategies() 608 void updateDevicesAndOutputs(); 609 610 // selects the most appropriate device on input for current state 611 audio_devices_t getNewInputDevice(audio_io_handle_t input); 612 613 virtual uint32_t getMaxEffectsCpuLoad(); 614 virtual uint32_t getMaxEffectsMemory(); 615#ifdef AUDIO_POLICY_TEST 616 virtual bool threadLoop(); 617 void exit(); 618 int testOutputIndex(audio_io_handle_t output); 619#endif //AUDIO_POLICY_TEST 620 621 status_t setEffectEnabled(EffectDescriptor *pDesc, bool enabled); 622 623 // returns the category the device belongs to with regard to volume curve management 624 static device_category getDeviceCategory(audio_devices_t device); 625 626 // extract one device relevant for volume control from multiple device selection 627 static audio_devices_t getDeviceForVolume(audio_devices_t device); 628 629 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 630 DefaultKeyedVector<audio_io_handle_t, AudioOutputDescriptor *> openOutputs); 631 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 632 SortedVector<audio_io_handle_t>& outputs2); 633 634 // mute/unmute strategies using an incompatible device combination 635 // if muting, wait for the audio in pcm buffer to be drained before proceeding 636 // if unmuting, unmute only after the specified delay 637 // Returns the number of ms waited 638 uint32_t checkDeviceMuteStrategies(AudioOutputDescriptor *outputDesc, 639 audio_devices_t prevDevice, 640 uint32_t delayMs); 641 642 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 643 audio_output_flags_t flags); 644 sp<IOProfile> getInputProfile(audio_devices_t device, 645 uint32_t samplingRate, 646 audio_format_t format, 647 audio_channel_mask_t channelMask); 648 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 649 uint32_t samplingRate, 650 audio_format_t format, 651 audio_channel_mask_t channelMask, 652 audio_output_flags_t flags); 653 654 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 655 656 bool isNonOffloadableEffectEnabled(); 657 658 status_t addAudioPatch(audio_patch_handle_t handle, 659 const sp<AudioPatch>& patch); 660 status_t removeAudioPatch(audio_patch_handle_t handle); 661 662 AudioOutputDescriptor *getOutputFromId(audio_port_handle_t id) const; 663 AudioInputDescriptor *getInputFromId(audio_port_handle_t id) const; 664 HwModule *getModuleForDevice(audio_devices_t device) const; 665 HwModule *getModuleFromName(const char *name) const; 666 // 667 // Audio policy configuration file parsing (audio_policy.conf) 668 // 669 static uint32_t stringToEnum(const struct StringToEnum *table, 670 size_t size, 671 const char *name); 672 static const char *enumToString(const struct StringToEnum *table, 673 size_t size, 674 uint32_t value); 675 static bool stringToBool(const char *value); 676 static audio_output_flags_t parseFlagNames(char *name); 677 static audio_devices_t parseDeviceNames(char *name); 678 void loadHwModule(cnode *root); 679 void loadHwModules(cnode *root); 680 void loadGlobalConfig(cnode *root, HwModule *module); 681 status_t loadAudioPolicyConfig(const char *path); 682 void defaultAudioPolicyConfig(void); 683 684 685 uid_t mUidCached; 686 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 687 audio_io_handle_t mPrimaryOutput; // primary output handle 688 // list of descriptors for outputs currently opened 689 DefaultKeyedVector<audio_io_handle_t, AudioOutputDescriptor *> mOutputs; 690 // copy of mOutputs before setDeviceConnectionState() opens new outputs 691 // reset to mOutputs when updateDevicesAndOutputs() is called. 692 DefaultKeyedVector<audio_io_handle_t, AudioOutputDescriptor *> mPreviousOutputs; 693 DefaultKeyedVector<audio_io_handle_t, AudioInputDescriptor *> mInputs; // list of input descriptors 694 DeviceVector mAvailableOutputDevices; // all available output devices 695 DeviceVector mAvailableInputDevices; // all available input devices 696 int mPhoneState; // current phone state 697 audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT]; // current forced use configuration 698 699 StreamDescriptor mStreams[AUDIO_STREAM_CNT]; // stream descriptors for volume control 700 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 701 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 702 float mLastVoiceVolume; // last voice volume value sent to audio HAL 703 704 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 705 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 706 // Maximum memory allocated to audio effects in KB 707 static const uint32_t MAX_EFFECTS_MEMORY = 512; 708 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 709 uint32_t mTotalEffectsMemory; // current memory used by effects 710 KeyedVector<int, EffectDescriptor *> mEffects; // list of registered audio effects 711 bool mA2dpSuspended; // true if A2DP output is suspended 712 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 713 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 714 // to boost soft sounds, used to adjust volume curves accordingly 715 716 Vector <HwModule *> mHwModules; 717 volatile int32_t mNextUniqueId; 718 volatile int32_t mAudioPortGeneration; 719 720 DefaultKeyedVector<audio_patch_handle_t, sp<AudioPatch> > mAudioPatches; 721 722#ifdef AUDIO_POLICY_TEST 723 Mutex mLock; 724 Condition mWaitWorkCV; 725 726 int mCurOutput; 727 bool mDirectOutput; 728 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 729 int mTestInput; 730 uint32_t mTestDevice; 731 uint32_t mTestSamplingRate; 732 uint32_t mTestFormat; 733 uint32_t mTestChannels; 734 uint32_t mTestLatencyMs; 735#endif //AUDIO_POLICY_TEST 736 737private: 738 static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, 739 int indexInUi); 740 // updates device caching and output for streams that can influence the 741 // routing of notifications 742 void handleNotificationRoutingForStream(audio_stream_type_t stream); 743 static bool isVirtualInputDevice(audio_devices_t device); 744 uint32_t nextUniqueId(); 745 uint32_t nextAudioPortGeneration(); 746 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 747 // converts device address to string sent to audio HAL via setParameters 748 static String8 addressToParameter(audio_devices_t device, const String8 address); 749}; 750 751}; 752