AudioPolicyManager.h revision e83b55dc29ca16092ba02f36f55fa6e0e37fd78c
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#define MAX_MIXER_SAMPLING_RATE 48000 56#define MAX_MIXER_CHANNEL_COUNT 8 57 58// ---------------------------------------------------------------------------- 59// AudioPolicyManager implements audio policy manager behavior common to all platforms. 60// ---------------------------------------------------------------------------- 61 62class AudioPolicyManager: public AudioPolicyInterface 63#ifdef AUDIO_POLICY_TEST 64 , public Thread 65#endif //AUDIO_POLICY_TEST 66{ 67 68public: 69 AudioPolicyManager(AudioPolicyClientInterface *clientInterface); 70 virtual ~AudioPolicyManager(); 71 72 // AudioPolicyInterface 73 virtual status_t setDeviceConnectionState(audio_devices_t device, 74 audio_policy_dev_state_t state, 75 const char *device_address); 76 virtual audio_policy_dev_state_t getDeviceConnectionState(audio_devices_t device, 77 const char *device_address); 78 virtual void setPhoneState(audio_mode_t state); 79 virtual void setForceUse(audio_policy_force_use_t usage, 80 audio_policy_forced_cfg_t config); 81 virtual audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage); 82 virtual void setSystemProperty(const char* property, const char* value); 83 virtual status_t initCheck(); 84 virtual audio_io_handle_t getOutput(audio_stream_type_t stream, 85 uint32_t samplingRate, 86 audio_format_t format, 87 audio_channel_mask_t channelMask, 88 audio_output_flags_t flags, 89 const audio_offload_info_t *offloadInfo); 90 virtual status_t getOutputForAttr(const audio_attributes_t *attr, 91 audio_io_handle_t *output, 92 audio_session_t session, 93 audio_stream_type_t *stream, 94 uint32_t samplingRate, 95 audio_format_t format, 96 audio_channel_mask_t channelMask, 97 audio_output_flags_t flags, 98 const audio_offload_info_t *offloadInfo); 99 virtual status_t startOutput(audio_io_handle_t output, 100 audio_stream_type_t stream, 101 audio_session_t session); 102 virtual status_t stopOutput(audio_io_handle_t output, 103 audio_stream_type_t stream, 104 audio_session_t session); 105 virtual void releaseOutput(audio_io_handle_t output, 106 audio_stream_type_t stream, 107 audio_session_t session); 108 virtual audio_io_handle_t getInput(audio_source_t inputSource, 109 uint32_t samplingRate, 110 audio_format_t format, 111 audio_channel_mask_t channelMask, 112 audio_session_t session, 113 audio_input_flags_t flags); 114 115 // indicates to the audio policy manager that the input starts being used. 116 virtual status_t startInput(audio_io_handle_t input, 117 audio_session_t session); 118 119 // indicates to the audio policy manager that the input stops being used. 120 virtual status_t stopInput(audio_io_handle_t input, 121 audio_session_t session); 122 virtual void releaseInput(audio_io_handle_t input, 123 audio_session_t session); 124 virtual void closeAllInputs(); 125 virtual void initStreamVolume(audio_stream_type_t stream, 126 int indexMin, 127 int indexMax); 128 virtual status_t setStreamVolumeIndex(audio_stream_type_t stream, 129 int index, 130 audio_devices_t device); 131 virtual status_t getStreamVolumeIndex(audio_stream_type_t stream, 132 int *index, 133 audio_devices_t device); 134 135 // return the strategy corresponding to a given stream type 136 virtual uint32_t getStrategyForStream(audio_stream_type_t stream); 137 // return the strategy corresponding to the given audio attributes 138 virtual uint32_t getStrategyForAttr(const audio_attributes_t *attr); 139 140 // return the enabled output devices for the given stream type 141 virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream); 142 143 virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc = NULL); 144 virtual status_t registerEffect(const effect_descriptor_t *desc, 145 audio_io_handle_t io, 146 uint32_t strategy, 147 int session, 148 int id); 149 virtual status_t unregisterEffect(int id); 150 virtual status_t setEffectEnabled(int id, bool enabled); 151 152 virtual bool isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 153 // return whether a stream is playing remotely, override to change the definition of 154 // local/remote playback, used for instance by notification manager to not make 155 // media players lose audio focus when not playing locally 156 virtual bool isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 157 virtual bool isSourceActive(audio_source_t source) const; 158 159 virtual status_t dump(int fd); 160 161 virtual bool isOffloadSupported(const audio_offload_info_t& offloadInfo); 162 163 virtual status_t listAudioPorts(audio_port_role_t role, 164 audio_port_type_t type, 165 unsigned int *num_ports, 166 struct audio_port *ports, 167 unsigned int *generation); 168 virtual status_t getAudioPort(struct audio_port *port); 169 virtual status_t createAudioPatch(const struct audio_patch *patch, 170 audio_patch_handle_t *handle, 171 uid_t uid); 172 virtual status_t releaseAudioPatch(audio_patch_handle_t handle, 173 uid_t uid); 174 virtual status_t listAudioPatches(unsigned int *num_patches, 175 struct audio_patch *patches, 176 unsigned int *generation); 177 virtual status_t setAudioPortConfig(const struct audio_port_config *config); 178 virtual void clearAudioPatches(uid_t uid); 179 180 virtual status_t acquireSoundTriggerSession(audio_session_t *session, 181 audio_io_handle_t *ioHandle, 182 audio_devices_t *device); 183 184 virtual status_t releaseSoundTriggerSession(audio_session_t session); 185 186protected: 187 188 enum routing_strategy { 189 STRATEGY_MEDIA, 190 STRATEGY_PHONE, 191 STRATEGY_SONIFICATION, 192 STRATEGY_SONIFICATION_RESPECTFUL, 193 STRATEGY_DTMF, 194 STRATEGY_ENFORCED_AUDIBLE, 195 STRATEGY_TRANSMITTED_THROUGH_SPEAKER, 196 STRATEGY_ACCESSIBILITY, 197 STRATEGY_REROUTING, 198 NUM_STRATEGIES 199 }; 200 201 // 4 points to define the volume attenuation curve, each characterized by the volume 202 // index (from 0 to 100) at which they apply, and the attenuation in dB at that index. 203 // we use 100 steps to avoid rounding errors when computing the volume in volIndexToAmpl() 204 205 enum { VOLMIN = 0, VOLKNEE1 = 1, VOLKNEE2 = 2, VOLMAX = 3, VOLCNT = 4}; 206 207 class VolumeCurvePoint 208 { 209 public: 210 int mIndex; 211 float mDBAttenuation; 212 }; 213 214 // device categories used for volume curve management. 215 enum device_category { 216 DEVICE_CATEGORY_HEADSET, 217 DEVICE_CATEGORY_SPEAKER, 218 DEVICE_CATEGORY_EARPIECE, 219 DEVICE_CATEGORY_EXT_MEDIA, 220 DEVICE_CATEGORY_CNT 221 }; 222 223 class HwModule; 224 225 class AudioGain: public RefBase 226 { 227 public: 228 AudioGain(int index, bool useInChannelMask); 229 virtual ~AudioGain() {} 230 231 void dump(int fd, int spaces, int index) const; 232 233 void getDefaultConfig(struct audio_gain_config *config); 234 status_t checkConfig(const struct audio_gain_config *config); 235 int mIndex; 236 struct audio_gain mGain; 237 bool mUseInChannelMask; 238 }; 239 240 class AudioPort: public virtual RefBase 241 { 242 public: 243 AudioPort(const String8& name, audio_port_type_t type, 244 audio_port_role_t role, const sp<HwModule>& module); 245 virtual ~AudioPort() {} 246 247 virtual void toAudioPort(struct audio_port *port) const; 248 249 void importAudioPort(const sp<AudioPort> port); 250 void clearCapabilities(); 251 252 void loadSamplingRates(char *name); 253 void loadFormats(char *name); 254 void loadOutChannels(char *name); 255 void loadInChannels(char *name); 256 257 audio_gain_mode_t loadGainMode(char *name); 258 void loadGain(cnode *root, int index); 259 void loadGains(cnode *root); 260 261 // searches for an exact match 262 status_t checkExactSamplingRate(uint32_t samplingRate) const; 263 // searches for a compatible match, and returns the best match via updatedSamplingRate 264 status_t checkCompatibleSamplingRate(uint32_t samplingRate, 265 uint32_t *updatedSamplingRate) const; 266 // searches for an exact match 267 status_t checkExactChannelMask(audio_channel_mask_t channelMask) const; 268 // searches for a compatible match, currently implemented for input channel masks only 269 status_t checkCompatibleChannelMask(audio_channel_mask_t channelMask) const; 270 status_t checkFormat(audio_format_t format) const; 271 status_t checkGain(const struct audio_gain_config *gainConfig, int index) const; 272 273 uint32_t pickSamplingRate() const; 274 audio_channel_mask_t pickChannelMask() const; 275 audio_format_t pickFormat() const; 276 277 static const audio_format_t sPcmFormatCompareTable[]; 278 static int compareFormats(audio_format_t format1, audio_format_t format2); 279 280 void dump(int fd, int spaces) const; 281 282 String8 mName; 283 audio_port_type_t mType; 284 audio_port_role_t mRole; 285 bool mUseInChannelMask; 286 // by convention, "0' in the first entry in mSamplingRates, mChannelMasks or mFormats 287 // indicates the supported parameters should be read from the output stream 288 // after it is opened for the first time 289 Vector <uint32_t> mSamplingRates; // supported sampling rates 290 Vector <audio_channel_mask_t> mChannelMasks; // supported channel masks 291 Vector <audio_format_t> mFormats; // supported audio formats 292 Vector < sp<AudioGain> > mGains; // gain controllers 293 sp<HwModule> mModule; // audio HW module exposing this I/O stream 294 uint32_t mFlags; // attribute flags (e.g primary output, 295 // direct output...). 296 }; 297 298 class AudioPortConfig: public virtual RefBase 299 { 300 public: 301 AudioPortConfig(); 302 virtual ~AudioPortConfig() {} 303 304 status_t applyAudioPortConfig(const struct audio_port_config *config, 305 struct audio_port_config *backupConfig = NULL); 306 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 307 const struct audio_port_config *srcConfig = NULL) const = 0; 308 virtual sp<AudioPort> getAudioPort() const = 0; 309 uint32_t mSamplingRate; 310 audio_format_t mFormat; 311 audio_channel_mask_t mChannelMask; 312 struct audio_gain_config mGain; 313 }; 314 315 316 class AudioPatch: public RefBase 317 { 318 public: 319 AudioPatch(audio_patch_handle_t handle, 320 const struct audio_patch *patch, uid_t uid) : 321 mHandle(handle), mPatch(*patch), mUid(uid), mAfPatchHandle(0) {} 322 323 status_t dump(int fd, int spaces, int index) const; 324 325 audio_patch_handle_t mHandle; 326 struct audio_patch mPatch; 327 uid_t mUid; 328 audio_patch_handle_t mAfPatchHandle; 329 }; 330 331 class DeviceDescriptor: public AudioPort, public AudioPortConfig 332 { 333 public: 334 DeviceDescriptor(const String8& name, audio_devices_t type); 335 336 virtual ~DeviceDescriptor() {} 337 338 bool equals(const sp<DeviceDescriptor>& other) const; 339 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 340 const struct audio_port_config *srcConfig = NULL) const; 341 virtual sp<AudioPort> getAudioPort() const { return (AudioPort*) this; } 342 343 virtual void toAudioPort(struct audio_port *port) const; 344 345 status_t dump(int fd, int spaces, int index) const; 346 347 audio_devices_t mDeviceType; 348 String8 mAddress; 349 audio_port_handle_t mId; 350 }; 351 352 class DeviceVector : public SortedVector< sp<DeviceDescriptor> > 353 { 354 public: 355 DeviceVector() : SortedVector(), mDeviceTypes(AUDIO_DEVICE_NONE) {} 356 357 ssize_t add(const sp<DeviceDescriptor>& item); 358 ssize_t remove(const sp<DeviceDescriptor>& item); 359 ssize_t indexOf(const sp<DeviceDescriptor>& item) const; 360 361 audio_devices_t types() const { return mDeviceTypes; } 362 363 void loadDevicesFromType(audio_devices_t types); 364 void loadDevicesFromName(char *name, const DeviceVector& declaredDevices); 365 366 sp<DeviceDescriptor> getDevice(audio_devices_t type, String8 address) const; 367 DeviceVector getDevicesFromType(audio_devices_t types) const; 368 sp<DeviceDescriptor> getDeviceFromId(audio_port_handle_t id) const; 369 sp<DeviceDescriptor> getDeviceFromName(const String8& name) const; 370 DeviceVector getDevicesFromTypeAddr(audio_devices_t type, String8 address) 371 const; 372 373 private: 374 void refreshTypes(); 375 audio_devices_t mDeviceTypes; 376 }; 377 378 // the IOProfile class describes the capabilities of an output or input stream. 379 // It is currently assumed that all combination of listed parameters are supported. 380 // It is used by the policy manager to determine if an output or input is suitable for 381 // a given use case, open/close it accordingly and connect/disconnect audio tracks 382 // to/from it. 383 class IOProfile : public AudioPort 384 { 385 public: 386 IOProfile(const String8& name, audio_port_role_t role, const sp<HwModule>& module); 387 virtual ~IOProfile(); 388 389 // This method is used for both output and input. 390 // If parameter updatedSamplingRate is non-NULL, it is assigned the actual sample rate. 391 // For input, flags is interpreted as audio_input_flags_t. 392 // TODO: merge audio_output_flags_t and audio_input_flags_t. 393 bool isCompatibleProfile(audio_devices_t device, 394 uint32_t samplingRate, 395 uint32_t *updatedSamplingRate, 396 audio_format_t format, 397 audio_channel_mask_t channelMask, 398 uint32_t flags) const; 399 400 void dump(int fd); 401 void log(); 402 403 DeviceVector mSupportedDevices; // supported devices 404 // (devices this output can be routed to) 405 }; 406 407 class HwModule : public RefBase 408 { 409 public: 410 HwModule(const char *name); 411 ~HwModule(); 412 413 status_t loadOutput(cnode *root); 414 status_t loadInput(cnode *root); 415 status_t loadDevice(cnode *root); 416 417 void dump(int fd); 418 419 const char *const mName; // base name of the audio HW module (primary, a2dp ...) 420 uint32_t mHalVersion; // audio HAL API version 421 audio_module_handle_t mHandle; 422 Vector < sp<IOProfile> > mOutputProfiles; // output profiles exposed by this module 423 Vector < sp<IOProfile> > mInputProfiles; // input profiles exposed by this module 424 DeviceVector mDeclaredDevices; // devices declared in audio_policy.conf 425 426 }; 427 428 // default volume curve 429 static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManager::VOLCNT]; 430 // default volume curve for media strategy 431 static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 432 // volume curve for non-media audio on ext media outputs (HDMI, Line, etc) 433 static const VolumeCurvePoint sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 434 // volume curve for media strategy on speakers 435 static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 436 static const VolumeCurvePoint sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 437 // volume curve for sonification strategy on speakers 438 static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT]; 439 static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 440 static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 441 static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 442 static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 443 static const VolumeCurvePoint sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 444 static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 445 static const VolumeCurvePoint sLinearVolumeCurve[AudioPolicyManager::VOLCNT]; 446 static const VolumeCurvePoint sSilentVolumeCurve[AudioPolicyManager::VOLCNT]; 447 static const VolumeCurvePoint sFullScaleVolumeCurve[AudioPolicyManager::VOLCNT]; 448 // default volume curves per stream and device category. See initializeVolumeCurves() 449 static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][DEVICE_CATEGORY_CNT]; 450 451 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output 452 // and keep track of the usage of this output by each audio stream type. 453 class AudioOutputDescriptor: public AudioPortConfig 454 { 455 public: 456 AudioOutputDescriptor(const sp<IOProfile>& profile); 457 458 status_t dump(int fd); 459 460 audio_devices_t device() const; 461 void changeRefCount(audio_stream_type_t stream, int delta); 462 463 bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); } 464 audio_devices_t supportedDevices(); 465 uint32_t latency(); 466 bool sharesHwModuleWith(const sp<AudioOutputDescriptor> outputDesc); 467 bool isActive(uint32_t inPastMs = 0) const; 468 bool isStreamActive(audio_stream_type_t stream, 469 uint32_t inPastMs = 0, 470 nsecs_t sysTime = 0) const; 471 bool isStrategyActive(routing_strategy strategy, 472 uint32_t inPastMs = 0, 473 nsecs_t sysTime = 0) const; 474 475 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 476 const struct audio_port_config *srcConfig = NULL) const; 477 virtual sp<AudioPort> getAudioPort() const { return mProfile; } 478 void toAudioPort(struct audio_port *port) const; 479 480 audio_port_handle_t mId; 481 audio_io_handle_t mIoHandle; // output handle 482 uint32_t mLatency; // 483 audio_output_flags_t mFlags; // 484 audio_devices_t mDevice; // current device this output is routed to 485 audio_patch_handle_t mPatchHandle; 486 uint32_t mRefCount[AUDIO_STREAM_CNT]; // number of streams of each type using this output 487 nsecs_t mStopTime[AUDIO_STREAM_CNT]; 488 sp<AudioOutputDescriptor> mOutput1; // used by duplicated outputs: first output 489 sp<AudioOutputDescriptor> mOutput2; // used by duplicated outputs: second output 490 float mCurVolume[AUDIO_STREAM_CNT]; // current stream volume 491 int mMuteCount[AUDIO_STREAM_CNT]; // mute request counter 492 const sp<IOProfile> mProfile; // I/O profile this output derives from 493 bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible 494 // device selection. See checkDeviceMuteStrategies() 495 uint32_t mDirectOpenCount; // number of clients using this output (direct outputs only) 496 }; 497 498 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 499 // and keep track of the usage of this input. 500 class AudioInputDescriptor: public AudioPortConfig 501 { 502 public: 503 AudioInputDescriptor(const sp<IOProfile>& profile); 504 505 status_t dump(int fd); 506 507 audio_port_handle_t mId; 508 audio_io_handle_t mIoHandle; // input handle 509 audio_devices_t mDevice; // current device this input is routed to 510 audio_patch_handle_t mPatchHandle; 511 uint32_t mRefCount; // number of AudioRecord clients using 512 // this input 513 uint32_t mOpenRefCount; 514 audio_source_t mInputSource; // input source selected by application 515 //(mediarecorder.h) 516 const sp<IOProfile> mProfile; // I/O profile this output derives from 517 SortedVector<audio_session_t> mSessions; // audio sessions attached to this input 518 bool mIsSoundTrigger; // used by a soundtrigger capture 519 520 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 521 const struct audio_port_config *srcConfig = NULL) const; 522 virtual sp<AudioPort> getAudioPort() const { return mProfile; } 523 void toAudioPort(struct audio_port *port) const; 524 }; 525 526 // stream descriptor used for volume control 527 class StreamDescriptor 528 { 529 public: 530 StreamDescriptor(); 531 532 int getVolumeIndex(audio_devices_t device); 533 void dump(int fd); 534 535 int mIndexMin; // min volume index 536 int mIndexMax; // max volume index 537 KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device 538 bool mCanBeMuted; // true is the stream can be muted 539 540 const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT]; 541 }; 542 543 // stream descriptor used for volume control 544 class EffectDescriptor : public RefBase 545 { 546 public: 547 548 status_t dump(int fd); 549 550 int mIo; // io the effect is attached to 551 routing_strategy mStrategy; // routing strategy the effect is associated to 552 int mSession; // audio session the effect is on 553 effect_descriptor_t mDesc; // effect descriptor 554 bool mEnabled; // enabled state: CPU load being used or not 555 }; 556 557 void addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc); 558 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 559 560 // return the strategy corresponding to a given stream type 561 static routing_strategy getStrategy(audio_stream_type_t stream); 562 563 // return appropriate device for streams handled by the specified strategy according to current 564 // phone state, connected devices... 565 // if fromCache is true, the device is returned from mDeviceForStrategy[], 566 // otherwise it is determine by current state 567 // (device connected,phone state, force use, a2dp output...) 568 // This allows to: 569 // 1 speed up process when the state is stable (when starting or stopping an output) 570 // 2 access to either current device selection (fromCache == true) or 571 // "future" device selection (fromCache == false) when called from a context 572 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 573 // before updateDevicesAndOutputs() is called. 574 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 575 bool fromCache); 576 577 // change the route of the specified output. Returns the number of ms we have slept to 578 // allow new routing to take effect in certain cases. 579 uint32_t setOutputDevice(audio_io_handle_t output, 580 audio_devices_t device, 581 bool force = false, 582 int delayMs = 0, 583 audio_patch_handle_t *patchHandle = NULL, 584 const char* address = NULL); 585 status_t resetOutputDevice(audio_io_handle_t output, 586 int delayMs = 0, 587 audio_patch_handle_t *patchHandle = NULL); 588 status_t setInputDevice(audio_io_handle_t input, 589 audio_devices_t device, 590 bool force = false, 591 audio_patch_handle_t *patchHandle = NULL); 592 status_t resetInputDevice(audio_io_handle_t input, 593 audio_patch_handle_t *patchHandle = NULL); 594 595 // select input device corresponding to requested audio source 596 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 597 598 // return io handle of active input or 0 if no input is active 599 // Only considers inputs from physical devices (e.g. main mic, headset mic) when 600 // ignoreVirtualInputs is true. 601 audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true); 602 603 uint32_t activeInputsCount() const; 604 605 // initialize volume curves for each strategy and device category 606 void initializeVolumeCurves(); 607 608 // compute the actual volume for a given stream according to the requested index and a particular 609 // device 610 virtual float computeVolume(audio_stream_type_t stream, int index, 611 audio_io_handle_t output, audio_devices_t device); 612 613 // check that volume change is permitted, compute and send new volume to audio hardware 614 virtual status_t checkAndSetVolume(audio_stream_type_t stream, int index, 615 audio_io_handle_t output, 616 audio_devices_t device, 617 int delayMs = 0, bool force = false); 618 619 // apply all stream volumes to the specified output and device 620 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 621 622 // Mute or unmute all streams handled by the specified strategy on the specified output 623 void setStrategyMute(routing_strategy strategy, 624 bool on, 625 audio_io_handle_t output, 626 int delayMs = 0, 627 audio_devices_t device = (audio_devices_t)0); 628 629 // Mute or unmute the stream on the specified output 630 void setStreamMute(audio_stream_type_t stream, 631 bool on, 632 audio_io_handle_t output, 633 int delayMs = 0, 634 audio_devices_t device = (audio_devices_t)0); 635 636 // handle special cases for sonification strategy while in call: mute streams or replace by 637 // a special tone in the device used for communication 638 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 639 640 // true if device is in a telephony or VoIP call 641 virtual bool isInCall(); 642 643 // true if given state represents a device in a telephony or VoIP call 644 virtual bool isStateInCall(int state); 645 646 // when a device is connected, checks if an open output can be routed 647 // to this device. If none is open, tries to open one of the available outputs. 648 // Returns an output suitable to this device or 0. 649 // when a device is disconnected, checks if an output is not used any more and 650 // returns its handle if any. 651 // transfers the audio tracks and effects from one output thread to another accordingly. 652 status_t checkOutputsForDevice(const sp<DeviceDescriptor> devDesc, 653 audio_policy_dev_state_t state, 654 SortedVector<audio_io_handle_t>& outputs, 655 const String8 address); 656 657 status_t checkInputsForDevice(audio_devices_t device, 658 audio_policy_dev_state_t state, 659 SortedVector<audio_io_handle_t>& inputs, 660 const String8 address); 661 662 // close an output and its companion duplicating output. 663 void closeOutput(audio_io_handle_t output); 664 665 // close an input. 666 void closeInput(audio_io_handle_t input); 667 668 // checks and if necessary changes outputs used for all strategies. 669 // must be called every time a condition that affects the output choice for a given strategy 670 // changes: connected device, phone state, force use... 671 // Must be called before updateDevicesAndOutputs() 672 void checkOutputForStrategy(routing_strategy strategy); 673 674 // Same as checkOutputForStrategy() but for a all strategies in order of priority 675 void checkOutputForAllStrategies(); 676 677 // manages A2DP output suspend/restore according to phone state and BT SCO usage 678 void checkA2dpSuspend(); 679 680 // returns the A2DP output handle if it is open or 0 otherwise 681 audio_io_handle_t getA2dpOutput(); 682 683 // selects the most appropriate device on output for current state 684 // must be called every time a condition that affects the device choice for a given output is 685 // changed: connected device, phone state, force use, output start, output stop.. 686 // see getDeviceForStrategy() for the use of fromCache parameter 687 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 688 689 // updates cache of device used by all strategies (mDeviceForStrategy[]) 690 // must be called every time a condition that affects the device choice for a given strategy is 691 // changed: connected device, phone state, force use... 692 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 693 // Must be called after checkOutputForAllStrategies() 694 void updateDevicesAndOutputs(); 695 696 // selects the most appropriate device on input for current state 697 audio_devices_t getNewInputDevice(audio_io_handle_t input); 698 699 virtual uint32_t getMaxEffectsCpuLoad(); 700 virtual uint32_t getMaxEffectsMemory(); 701#ifdef AUDIO_POLICY_TEST 702 virtual bool threadLoop(); 703 void exit(); 704 int testOutputIndex(audio_io_handle_t output); 705#endif //AUDIO_POLICY_TEST 706 707 status_t setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled); 708 709 // returns the category the device belongs to with regard to volume curve management 710 static device_category getDeviceCategory(audio_devices_t device); 711 712 // extract one device relevant for volume control from multiple device selection 713 static audio_devices_t getDeviceForVolume(audio_devices_t device); 714 715 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 716 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs); 717 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 718 SortedVector<audio_io_handle_t>& outputs2); 719 720 // mute/unmute strategies using an incompatible device combination 721 // if muting, wait for the audio in pcm buffer to be drained before proceeding 722 // if unmuting, unmute only after the specified delay 723 // Returns the number of ms waited 724 uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 725 audio_devices_t prevDevice, 726 uint32_t delayMs); 727 728 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 729 audio_output_flags_t flags, 730 audio_format_t format); 731 // samplingRate parameter is an in/out and so may be modified 732 sp<IOProfile> getInputProfile(audio_devices_t device, 733 uint32_t& samplingRate, 734 audio_format_t format, 735 audio_channel_mask_t channelMask, 736 audio_input_flags_t flags); 737 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 738 uint32_t samplingRate, 739 audio_format_t format, 740 audio_channel_mask_t channelMask, 741 audio_output_flags_t flags); 742 743 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 744 745 bool isNonOffloadableEffectEnabled(); 746 747 status_t addAudioPatch(audio_patch_handle_t handle, 748 const sp<AudioPatch>& patch); 749 status_t removeAudioPatch(audio_patch_handle_t handle); 750 751 sp<AudioOutputDescriptor> getOutputFromId(audio_port_handle_t id) const; 752 sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const; 753 sp<HwModule> getModuleForDevice(audio_devices_t device) const; 754 sp<HwModule> getModuleFromName(const char *name) const; 755 audio_devices_t availablePrimaryOutputDevices(); 756 audio_devices_t availablePrimaryInputDevices(); 757 758 void updateCallRouting(audio_devices_t rxDevice, int delayMs = 0); 759 760 // 761 // Audio policy configuration file parsing (audio_policy.conf) 762 // 763 static uint32_t stringToEnum(const struct StringToEnum *table, 764 size_t size, 765 const char *name); 766 static const char *enumToString(const struct StringToEnum *table, 767 size_t size, 768 uint32_t value); 769 static bool stringToBool(const char *value); 770 static uint32_t parseOutputFlagNames(char *name); 771 static uint32_t parseInputFlagNames(char *name); 772 static audio_devices_t parseDeviceNames(char *name); 773 void loadHwModule(cnode *root); 774 void loadHwModules(cnode *root); 775 void loadGlobalConfig(cnode *root, const sp<HwModule>& module); 776 status_t loadAudioPolicyConfig(const char *path); 777 void defaultAudioPolicyConfig(void); 778 779 780 uid_t mUidCached; 781 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 782 audio_io_handle_t mPrimaryOutput; // primary output handle 783 // list of descriptors for outputs currently opened 784 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mOutputs; 785 // copy of mOutputs before setDeviceConnectionState() opens new outputs 786 // reset to mOutputs when updateDevicesAndOutputs() is called. 787 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mPreviousOutputs; 788 DefaultKeyedVector<audio_io_handle_t, sp<AudioInputDescriptor> > mInputs; // list of input descriptors 789 DeviceVector mAvailableOutputDevices; // all available output devices 790 DeviceVector mAvailableInputDevices; // all available input devices 791 int mPhoneState; // current phone state 792 audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT]; // current forced use configuration 793 794 StreamDescriptor mStreams[AUDIO_STREAM_CNT]; // stream descriptors for volume control 795 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 796 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 797 float mLastVoiceVolume; // last voice volume value sent to audio HAL 798 799 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 800 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 801 // Maximum memory allocated to audio effects in KB 802 static const uint32_t MAX_EFFECTS_MEMORY = 512; 803 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 804 uint32_t mTotalEffectsMemory; // current memory used by effects 805 KeyedVector<int, sp<EffectDescriptor> > mEffects; // list of registered audio effects 806 bool mA2dpSuspended; // true if A2DP output is suspended 807 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 808 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 809 // to boost soft sounds, used to adjust volume curves accordingly 810 811 Vector < sp<HwModule> > mHwModules; 812 volatile int32_t mNextUniqueId; 813 volatile int32_t mAudioPortGeneration; 814 815 DefaultKeyedVector<audio_patch_handle_t, sp<AudioPatch> > mAudioPatches; 816 817 DefaultKeyedVector<audio_session_t, audio_io_handle_t> mSoundTriggerSessions; 818 819 sp<AudioPatch> mCallTxPatch; 820 sp<AudioPatch> mCallRxPatch; 821 822 // for supporting "beacon" streams, i.e. streams that only play on speaker, and never 823 // when something other than STREAM_TTS (a.k.a. "Transmitted Through Speaker") is playing 824 enum { 825 STARTING_OUTPUT, 826 STARTING_BEACON, 827 STOPPING_OUTPUT, 828 STOPPING_BEACON 829 }; 830 uint32_t mBeaconMuteRefCount; // ref count for stream that would mute beacon 831 uint32_t mBeaconPlayingRefCount;// ref count for the playing beacon streams 832 bool mBeaconMuted; // has STREAM_TTS been muted 833 834#ifdef AUDIO_POLICY_TEST 835 Mutex mLock; 836 Condition mWaitWorkCV; 837 838 int mCurOutput; 839 bool mDirectOutput; 840 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 841 int mTestInput; 842 uint32_t mTestDevice; 843 uint32_t mTestSamplingRate; 844 uint32_t mTestFormat; 845 uint32_t mTestChannels; 846 uint32_t mTestLatencyMs; 847#endif //AUDIO_POLICY_TEST 848 static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, 849 int indexInUi); 850private: 851 // updates device caching and output for streams that can influence the 852 // routing of notifications 853 void handleNotificationRoutingForStream(audio_stream_type_t stream); 854 static bool isVirtualInputDevice(audio_devices_t device); 855 static bool deviceDistinguishesOnAddress(audio_devices_t device); 856 // find the outputs on a given output descriptor that have the given address. 857 // to be called on an AudioOutputDescriptor whose supported devices (as defined 858 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 859 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 860 // where addresses are used to distinguish between one connected device and another. 861 void findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/, 862 const String8 address /*in*/, 863 SortedVector<audio_io_handle_t>& outputs /*out*/); 864 uint32_t nextUniqueId(); 865 uint32_t nextAudioPortGeneration(); 866 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 867 // internal method to return the output handle for the given device and format 868 audio_io_handle_t getOutputForDevice( 869 audio_devices_t device, 870 audio_session_t session, 871 audio_stream_type_t stream, 872 uint32_t samplingRate, 873 audio_format_t format, 874 audio_channel_mask_t channelMask, 875 audio_output_flags_t flags, 876 const audio_offload_info_t *offloadInfo); 877 // internal function to derive a stream type value from audio attributes 878 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 879 // return true if any output is playing anything besides the stream to ignore 880 bool isAnyOutputActive(audio_stream_type_t streamToIgnore); 881 // event is one of STARTING_OUTPUT, STARTING_BEACON, STOPPING_OUTPUT, STOPPING_BEACON 882 // returns 0 if no mute/unmute event happened, the largest latency of the device where 883 // the mute/unmute happened 884 uint32_t handleEventForBeacon(int event); 885 uint32_t setBeaconMute(bool mute); 886 bool isValidAttributes(const audio_attributes_t *paa); 887}; 888 889}; 890