AudioPolicyManager.h revision 275e8e9de2e11b4b344f5a201f1f0e51fda02d9c
1/* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 18#include <stdint.h> 19#include <sys/types.h> 20#include <cutils/config_utils.h> 21#include <cutils/misc.h> 22#include <utils/Timers.h> 23#include <utils/Errors.h> 24#include <utils/KeyedVector.h> 25#include <utils/SortedVector.h> 26#include <media/AudioPolicy.h> 27#include "AudioPolicyInterface.h" 28 29 30namespace android { 31 32// ---------------------------------------------------------------------------- 33 34// Attenuation applied to STRATEGY_SONIFICATION streams when a headset is connected: 6dB 35#define SONIFICATION_HEADSET_VOLUME_FACTOR 0.5 36// Min volume for STRATEGY_SONIFICATION streams when limited by music volume: -36dB 37#define SONIFICATION_HEADSET_VOLUME_MIN 0.016 38// Time in milliseconds during which we consider that music is still active after a music 39// track was stopped - see computeVolume() 40#define SONIFICATION_HEADSET_MUSIC_DELAY 5000 41// Time in milliseconds after media stopped playing during which we consider that the 42// sonification should be as unobtrusive as during the time media was playing. 43#define SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY 5000 44// Time in milliseconds during witch some streams are muted while the audio path 45// is switched 46#define MUTE_TIME_MS 2000 47 48#define NUM_TEST_OUTPUTS 5 49 50#define NUM_VOL_CURVE_KNEES 2 51 52// Default minimum length allowed for offloading a compressed track 53// Can be overridden by the audio.offload.min.duration.secs property 54#define OFFLOAD_DEFAULT_MIN_DURATION_SECS 60 55 56#define MAX_MIXER_SAMPLING_RATE 48000 57#define MAX_MIXER_CHANNEL_COUNT 8 58 59// ---------------------------------------------------------------------------- 60// AudioPolicyManager implements audio policy manager behavior common to all platforms. 61// ---------------------------------------------------------------------------- 62 63class AudioPolicyManager: public AudioPolicyInterface 64#ifdef AUDIO_POLICY_TEST 65 , public Thread 66#endif //AUDIO_POLICY_TEST 67{ 68 69public: 70 AudioPolicyManager(AudioPolicyClientInterface *clientInterface); 71 virtual ~AudioPolicyManager(); 72 73 // AudioPolicyInterface 74 virtual status_t setDeviceConnectionState(audio_devices_t device, 75 audio_policy_dev_state_t state, 76 const char *device_address); 77 virtual audio_policy_dev_state_t getDeviceConnectionState(audio_devices_t device, 78 const char *device_address); 79 virtual void setPhoneState(audio_mode_t state); 80 virtual void setForceUse(audio_policy_force_use_t usage, 81 audio_policy_forced_cfg_t config); 82 virtual audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage); 83 virtual void setSystemProperty(const char* property, const char* value); 84 virtual status_t initCheck(); 85 virtual audio_io_handle_t getOutput(audio_stream_type_t stream, 86 uint32_t samplingRate, 87 audio_format_t format, 88 audio_channel_mask_t channelMask, 89 audio_output_flags_t flags, 90 const audio_offload_info_t *offloadInfo); 91 virtual status_t getOutputForAttr(const audio_attributes_t *attr, 92 audio_io_handle_t *output, 93 audio_session_t session, 94 audio_stream_type_t *stream, 95 uint32_t samplingRate, 96 audio_format_t format, 97 audio_channel_mask_t channelMask, 98 audio_output_flags_t flags, 99 const audio_offload_info_t *offloadInfo); 100 virtual status_t startOutput(audio_io_handle_t output, 101 audio_stream_type_t stream, 102 audio_session_t session); 103 virtual status_t stopOutput(audio_io_handle_t output, 104 audio_stream_type_t stream, 105 audio_session_t session); 106 virtual void releaseOutput(audio_io_handle_t output, 107 audio_stream_type_t stream, 108 audio_session_t session); 109 virtual status_t getInputForAttr(const audio_attributes_t *attr, 110 audio_io_handle_t *input, 111 audio_session_t session, 112 uint32_t samplingRate, 113 audio_format_t format, 114 audio_channel_mask_t channelMask, 115 audio_input_flags_t flags); 116 117 // indicates to the audio policy manager that the input starts being used. 118 virtual status_t startInput(audio_io_handle_t input, 119 audio_session_t session); 120 121 // indicates to the audio policy manager that the input stops being used. 122 virtual status_t stopInput(audio_io_handle_t input, 123 audio_session_t session); 124 virtual void releaseInput(audio_io_handle_t input, 125 audio_session_t session); 126 virtual void closeAllInputs(); 127 virtual void initStreamVolume(audio_stream_type_t stream, 128 int indexMin, 129 int indexMax); 130 virtual status_t setStreamVolumeIndex(audio_stream_type_t stream, 131 int index, 132 audio_devices_t device); 133 virtual status_t getStreamVolumeIndex(audio_stream_type_t stream, 134 int *index, 135 audio_devices_t device); 136 137 // return the strategy corresponding to a given stream type 138 virtual uint32_t getStrategyForStream(audio_stream_type_t stream); 139 // return the strategy corresponding to the given audio attributes 140 virtual uint32_t getStrategyForAttr(const audio_attributes_t *attr); 141 142 // return the enabled output devices for the given stream type 143 virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream); 144 145 virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc = NULL); 146 virtual status_t registerEffect(const effect_descriptor_t *desc, 147 audio_io_handle_t io, 148 uint32_t strategy, 149 int session, 150 int id); 151 virtual status_t unregisterEffect(int id); 152 virtual status_t setEffectEnabled(int id, bool enabled); 153 154 virtual bool isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 155 // return whether a stream is playing remotely, override to change the definition of 156 // local/remote playback, used for instance by notification manager to not make 157 // media players lose audio focus when not playing locally 158 virtual bool isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 159 virtual bool isSourceActive(audio_source_t source) const; 160 161 virtual status_t dump(int fd); 162 163 virtual bool isOffloadSupported(const audio_offload_info_t& offloadInfo); 164 165 virtual status_t listAudioPorts(audio_port_role_t role, 166 audio_port_type_t type, 167 unsigned int *num_ports, 168 struct audio_port *ports, 169 unsigned int *generation); 170 virtual status_t getAudioPort(struct audio_port *port); 171 virtual status_t createAudioPatch(const struct audio_patch *patch, 172 audio_patch_handle_t *handle, 173 uid_t uid); 174 virtual status_t releaseAudioPatch(audio_patch_handle_t handle, 175 uid_t uid); 176 virtual status_t listAudioPatches(unsigned int *num_patches, 177 struct audio_patch *patches, 178 unsigned int *generation); 179 virtual status_t setAudioPortConfig(const struct audio_port_config *config); 180 virtual void clearAudioPatches(uid_t uid); 181 182 virtual status_t acquireSoundTriggerSession(audio_session_t *session, 183 audio_io_handle_t *ioHandle, 184 audio_devices_t *device); 185 186 virtual status_t releaseSoundTriggerSession(audio_session_t session); 187 188 virtual status_t registerPolicyMixes(Vector<AudioMix> mixes); 189 virtual status_t unregisterPolicyMixes(Vector<AudioMix> mixes); 190 191protected: 192 193 enum routing_strategy { 194 STRATEGY_MEDIA, 195 STRATEGY_PHONE, 196 STRATEGY_SONIFICATION, 197 STRATEGY_SONIFICATION_RESPECTFUL, 198 STRATEGY_DTMF, 199 STRATEGY_ENFORCED_AUDIBLE, 200 STRATEGY_TRANSMITTED_THROUGH_SPEAKER, 201 STRATEGY_ACCESSIBILITY, 202 STRATEGY_REROUTING, 203 NUM_STRATEGIES 204 }; 205 206 // 4 points to define the volume attenuation curve, each characterized by the volume 207 // index (from 0 to 100) at which they apply, and the attenuation in dB at that index. 208 // we use 100 steps to avoid rounding errors when computing the volume in volIndexToAmpl() 209 210 enum { VOLMIN = 0, VOLKNEE1 = 1, VOLKNEE2 = 2, VOLMAX = 3, VOLCNT = 4}; 211 212 class VolumeCurvePoint 213 { 214 public: 215 int mIndex; 216 float mDBAttenuation; 217 }; 218 219 // device categories used for volume curve management. 220 enum device_category { 221 DEVICE_CATEGORY_HEADSET, 222 DEVICE_CATEGORY_SPEAKER, 223 DEVICE_CATEGORY_EARPIECE, 224 DEVICE_CATEGORY_EXT_MEDIA, 225 DEVICE_CATEGORY_CNT 226 }; 227 228 class HwModule; 229 230 class AudioGain: public RefBase 231 { 232 public: 233 AudioGain(int index, bool useInChannelMask); 234 virtual ~AudioGain() {} 235 236 void dump(int fd, int spaces, int index) const; 237 238 void getDefaultConfig(struct audio_gain_config *config); 239 status_t checkConfig(const struct audio_gain_config *config); 240 int mIndex; 241 struct audio_gain mGain; 242 bool mUseInChannelMask; 243 }; 244 245 class AudioPort: public virtual RefBase 246 { 247 public: 248 AudioPort(const String8& name, audio_port_type_t type, 249 audio_port_role_t role, const sp<HwModule>& module); 250 virtual ~AudioPort() {} 251 252 virtual void toAudioPort(struct audio_port *port) const; 253 254 void importAudioPort(const sp<AudioPort> port); 255 void clearCapabilities(); 256 257 void loadSamplingRates(char *name); 258 void loadFormats(char *name); 259 void loadOutChannels(char *name); 260 void loadInChannels(char *name); 261 262 audio_gain_mode_t loadGainMode(char *name); 263 void loadGain(cnode *root, int index); 264 void loadGains(cnode *root); 265 266 // searches for an exact match 267 status_t checkExactSamplingRate(uint32_t samplingRate) const; 268 // searches for a compatible match, and returns the best match via updatedSamplingRate 269 status_t checkCompatibleSamplingRate(uint32_t samplingRate, 270 uint32_t *updatedSamplingRate) const; 271 // searches for an exact match 272 status_t checkExactChannelMask(audio_channel_mask_t channelMask) const; 273 // searches for a compatible match, currently implemented for input channel masks only 274 status_t checkCompatibleChannelMask(audio_channel_mask_t channelMask) const; 275 status_t checkFormat(audio_format_t format) const; 276 status_t checkGain(const struct audio_gain_config *gainConfig, int index) const; 277 278 uint32_t pickSamplingRate() const; 279 audio_channel_mask_t pickChannelMask() const; 280 audio_format_t pickFormat() const; 281 282 static const audio_format_t sPcmFormatCompareTable[]; 283 static int compareFormats(audio_format_t format1, audio_format_t format2); 284 285 void dump(int fd, int spaces) const; 286 287 String8 mName; 288 audio_port_type_t mType; 289 audio_port_role_t mRole; 290 bool mUseInChannelMask; 291 // by convention, "0' in the first entry in mSamplingRates, mChannelMasks or mFormats 292 // indicates the supported parameters should be read from the output stream 293 // after it is opened for the first time 294 Vector <uint32_t> mSamplingRates; // supported sampling rates 295 Vector <audio_channel_mask_t> mChannelMasks; // supported channel masks 296 Vector <audio_format_t> mFormats; // supported audio formats 297 Vector < sp<AudioGain> > mGains; // gain controllers 298 sp<HwModule> mModule; // audio HW module exposing this I/O stream 299 uint32_t mFlags; // attribute flags (e.g primary output, 300 // direct output...). 301 }; 302 303 class AudioPortConfig: public virtual RefBase 304 { 305 public: 306 AudioPortConfig(); 307 virtual ~AudioPortConfig() {} 308 309 status_t applyAudioPortConfig(const struct audio_port_config *config, 310 struct audio_port_config *backupConfig = NULL); 311 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 312 const struct audio_port_config *srcConfig = NULL) const = 0; 313 virtual sp<AudioPort> getAudioPort() const = 0; 314 uint32_t mSamplingRate; 315 audio_format_t mFormat; 316 audio_channel_mask_t mChannelMask; 317 struct audio_gain_config mGain; 318 }; 319 320 321 class AudioPatch: public RefBase 322 { 323 public: 324 AudioPatch(audio_patch_handle_t handle, 325 const struct audio_patch *patch, uid_t uid) : 326 mHandle(handle), mPatch(*patch), mUid(uid), mAfPatchHandle(0) {} 327 328 status_t dump(int fd, int spaces, int index) const; 329 330 audio_patch_handle_t mHandle; 331 struct audio_patch mPatch; 332 uid_t mUid; 333 audio_patch_handle_t mAfPatchHandle; 334 }; 335 336 class DeviceDescriptor: public AudioPort, public AudioPortConfig 337 { 338 public: 339 DeviceDescriptor(const String8& name, audio_devices_t type); 340 341 virtual ~DeviceDescriptor() {} 342 343 bool equals(const sp<DeviceDescriptor>& other) const; 344 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 345 const struct audio_port_config *srcConfig = NULL) const; 346 virtual sp<AudioPort> getAudioPort() const { return (AudioPort*) this; } 347 348 virtual void toAudioPort(struct audio_port *port) const; 349 350 status_t dump(int fd, int spaces, int index) const; 351 352 audio_devices_t mDeviceType; 353 String8 mAddress; 354 audio_port_handle_t mId; 355 }; 356 357 class DeviceVector : public SortedVector< sp<DeviceDescriptor> > 358 { 359 public: 360 DeviceVector() : SortedVector(), mDeviceTypes(AUDIO_DEVICE_NONE) {} 361 362 ssize_t add(const sp<DeviceDescriptor>& item); 363 ssize_t remove(const sp<DeviceDescriptor>& item); 364 ssize_t indexOf(const sp<DeviceDescriptor>& item) const; 365 366 audio_devices_t types() const { return mDeviceTypes; } 367 368 void loadDevicesFromType(audio_devices_t types); 369 void loadDevicesFromName(char *name, const DeviceVector& declaredDevices); 370 371 sp<DeviceDescriptor> getDevice(audio_devices_t type, String8 address) const; 372 DeviceVector getDevicesFromType(audio_devices_t types) const; 373 sp<DeviceDescriptor> getDeviceFromId(audio_port_handle_t id) const; 374 sp<DeviceDescriptor> getDeviceFromName(const String8& name) const; 375 DeviceVector getDevicesFromTypeAddr(audio_devices_t type, String8 address) 376 const; 377 378 private: 379 void refreshTypes(); 380 audio_devices_t mDeviceTypes; 381 }; 382 383 // the IOProfile class describes the capabilities of an output or input stream. 384 // It is currently assumed that all combination of listed parameters are supported. 385 // It is used by the policy manager to determine if an output or input is suitable for 386 // a given use case, open/close it accordingly and connect/disconnect audio tracks 387 // to/from it. 388 class IOProfile : public AudioPort 389 { 390 public: 391 IOProfile(const String8& name, audio_port_role_t role, const sp<HwModule>& module); 392 virtual ~IOProfile(); 393 394 // This method is used for both output and input. 395 // If parameter updatedSamplingRate is non-NULL, it is assigned the actual sample rate. 396 // For input, flags is interpreted as audio_input_flags_t. 397 // TODO: merge audio_output_flags_t and audio_input_flags_t. 398 bool isCompatibleProfile(audio_devices_t device, 399 String8 address, 400 uint32_t samplingRate, 401 uint32_t *updatedSamplingRate, 402 audio_format_t format, 403 audio_channel_mask_t channelMask, 404 uint32_t flags) const; 405 406 void dump(int fd); 407 void log(); 408 409 DeviceVector mSupportedDevices; // supported devices 410 // (devices this output can be routed to) 411 }; 412 413 class HwModule : public RefBase 414 { 415 public: 416 HwModule(const char *name); 417 ~HwModule(); 418 419 status_t loadOutput(cnode *root); 420 status_t loadInput(cnode *root); 421 status_t loadDevice(cnode *root); 422 423 status_t addOutputProfile(String8 name, const audio_config_t *config, 424 audio_devices_t device, String8 address); 425 status_t removeOutputProfile(String8 name); 426 status_t addInputProfile(String8 name, const audio_config_t *config, 427 audio_devices_t device, String8 address); 428 status_t removeInputProfile(String8 name); 429 430 void dump(int fd); 431 432 const char *const mName; // base name of the audio HW module (primary, a2dp ...) 433 uint32_t mHalVersion; // audio HAL API version 434 audio_module_handle_t mHandle; 435 Vector < sp<IOProfile> > mOutputProfiles; // output profiles exposed by this module 436 Vector < sp<IOProfile> > mInputProfiles; // input profiles exposed by this module 437 DeviceVector mDeclaredDevices; // devices declared in audio_policy.conf 438 439 }; 440 441 // default volume curve 442 static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManager::VOLCNT]; 443 // default volume curve for media strategy 444 static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 445 // volume curve for non-media audio on ext media outputs (HDMI, Line, etc) 446 static const VolumeCurvePoint sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 447 // volume curve for media strategy on speakers 448 static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 449 static const VolumeCurvePoint sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 450 // volume curve for sonification strategy on speakers 451 static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT]; 452 static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 453 static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 454 static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 455 static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 456 static const VolumeCurvePoint sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 457 static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 458 static const VolumeCurvePoint sLinearVolumeCurve[AudioPolicyManager::VOLCNT]; 459 static const VolumeCurvePoint sSilentVolumeCurve[AudioPolicyManager::VOLCNT]; 460 static const VolumeCurvePoint sFullScaleVolumeCurve[AudioPolicyManager::VOLCNT]; 461 // default volume curves per stream and device category. See initializeVolumeCurves() 462 static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][DEVICE_CATEGORY_CNT]; 463 464 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output 465 // and keep track of the usage of this output by each audio stream type. 466 class AudioOutputDescriptor: public AudioPortConfig 467 { 468 public: 469 AudioOutputDescriptor(const sp<IOProfile>& profile); 470 471 status_t dump(int fd); 472 473 audio_devices_t device() const; 474 void changeRefCount(audio_stream_type_t stream, int delta); 475 476 bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); } 477 audio_devices_t supportedDevices(); 478 uint32_t latency(); 479 bool sharesHwModuleWith(const sp<AudioOutputDescriptor> outputDesc); 480 bool isActive(uint32_t inPastMs = 0) const; 481 bool isStreamActive(audio_stream_type_t stream, 482 uint32_t inPastMs = 0, 483 nsecs_t sysTime = 0) const; 484 bool isStrategyActive(routing_strategy strategy, 485 uint32_t inPastMs = 0, 486 nsecs_t sysTime = 0) const; 487 488 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 489 const struct audio_port_config *srcConfig = NULL) const; 490 virtual sp<AudioPort> getAudioPort() const { return mProfile; } 491 void toAudioPort(struct audio_port *port) const; 492 493 audio_port_handle_t mId; 494 audio_io_handle_t mIoHandle; // output handle 495 uint32_t mLatency; // 496 audio_output_flags_t mFlags; // 497 audio_devices_t mDevice; // current device this output is routed to 498 String8 mPolicyMixAddress; // non empty or "0" when used by a dynamic policy 499 audio_patch_handle_t mPatchHandle; 500 uint32_t mRefCount[AUDIO_STREAM_CNT]; // number of streams of each type using this output 501 nsecs_t mStopTime[AUDIO_STREAM_CNT]; 502 sp<AudioOutputDescriptor> mOutput1; // used by duplicated outputs: first output 503 sp<AudioOutputDescriptor> mOutput2; // used by duplicated outputs: second output 504 float mCurVolume[AUDIO_STREAM_CNT]; // current stream volume 505 int mMuteCount[AUDIO_STREAM_CNT]; // mute request counter 506 const sp<IOProfile> mProfile; // I/O profile this output derives from 507 bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible 508 // device selection. See checkDeviceMuteStrategies() 509 uint32_t mDirectOpenCount; // number of clients using this output (direct outputs only) 510 }; 511 512 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 513 // and keep track of the usage of this input. 514 class AudioInputDescriptor: public AudioPortConfig 515 { 516 public: 517 AudioInputDescriptor(const sp<IOProfile>& profile); 518 519 status_t dump(int fd); 520 521 audio_port_handle_t mId; 522 audio_io_handle_t mIoHandle; // input handle 523 audio_devices_t mDevice; // current device this input is routed to 524 audio_patch_handle_t mPatchHandle; 525 uint32_t mRefCount; // number of AudioRecord clients using 526 // this input 527 uint32_t mOpenRefCount; 528 audio_source_t mInputSource; // input source selected by application 529 //(mediarecorder.h) 530 const sp<IOProfile> mProfile; // I/O profile this output derives from 531 // audio sessions attached to this input and the 532 // corresponding device address 533 DefaultKeyedVector<audio_session_t, String8> mSessions; 534 bool mIsSoundTrigger; // used by a soundtrigger capture 535 536 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 537 const struct audio_port_config *srcConfig = NULL) const; 538 virtual sp<AudioPort> getAudioPort() const { return mProfile; } 539 void toAudioPort(struct audio_port *port) const; 540 }; 541 542 // stream descriptor used for volume control 543 class StreamDescriptor 544 { 545 public: 546 StreamDescriptor(); 547 548 int getVolumeIndex(audio_devices_t device); 549 void dump(int fd); 550 551 int mIndexMin; // min volume index 552 int mIndexMax; // max volume index 553 KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device 554 bool mCanBeMuted; // true is the stream can be muted 555 556 const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT]; 557 }; 558 559 // stream descriptor used for volume control 560 class EffectDescriptor : public RefBase 561 { 562 public: 563 564 status_t dump(int fd); 565 566 int mIo; // io the effect is attached to 567 routing_strategy mStrategy; // routing strategy the effect is associated to 568 int mSession; // audio session the effect is on 569 effect_descriptor_t mDesc; // effect descriptor 570 bool mEnabled; // enabled state: CPU load being used or not 571 }; 572 573 void addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc); 574 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 575 576 // return the strategy corresponding to a given stream type 577 static routing_strategy getStrategy(audio_stream_type_t stream); 578 579 // return appropriate device for streams handled by the specified strategy according to current 580 // phone state, connected devices... 581 // if fromCache is true, the device is returned from mDeviceForStrategy[], 582 // otherwise it is determine by current state 583 // (device connected,phone state, force use, a2dp output...) 584 // This allows to: 585 // 1 speed up process when the state is stable (when starting or stopping an output) 586 // 2 access to either current device selection (fromCache == true) or 587 // "future" device selection (fromCache == false) when called from a context 588 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 589 // before updateDevicesAndOutputs() is called. 590 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 591 bool fromCache); 592 593 // change the route of the specified output. Returns the number of ms we have slept to 594 // allow new routing to take effect in certain cases. 595 uint32_t setOutputDevice(audio_io_handle_t output, 596 audio_devices_t device, 597 bool force = false, 598 int delayMs = 0, 599 audio_patch_handle_t *patchHandle = NULL, 600 const char* address = NULL); 601 status_t resetOutputDevice(audio_io_handle_t output, 602 int delayMs = 0, 603 audio_patch_handle_t *patchHandle = NULL); 604 status_t setInputDevice(audio_io_handle_t input, 605 audio_devices_t device, 606 bool force = false, 607 audio_patch_handle_t *patchHandle = NULL); 608 status_t resetInputDevice(audio_io_handle_t input, 609 audio_patch_handle_t *patchHandle = NULL); 610 611 // select input device corresponding to requested audio source 612 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource, 613 String8 *address = NULL); 614 615 // return io handle of active input or 0 if no input is active 616 // Only considers inputs from physical devices (e.g. main mic, headset mic) when 617 // ignoreVirtualInputs is true. 618 audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true); 619 620 uint32_t activeInputsCount() const; 621 622 // initialize volume curves for each strategy and device category 623 void initializeVolumeCurves(); 624 625 // compute the actual volume for a given stream according to the requested index and a particular 626 // device 627 virtual float computeVolume(audio_stream_type_t stream, int index, 628 audio_io_handle_t output, audio_devices_t device); 629 630 // check that volume change is permitted, compute and send new volume to audio hardware 631 virtual status_t checkAndSetVolume(audio_stream_type_t stream, int index, 632 audio_io_handle_t output, 633 audio_devices_t device, 634 int delayMs = 0, bool force = false); 635 636 // apply all stream volumes to the specified output and device 637 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 638 639 // Mute or unmute all streams handled by the specified strategy on the specified output 640 void setStrategyMute(routing_strategy strategy, 641 bool on, 642 audio_io_handle_t output, 643 int delayMs = 0, 644 audio_devices_t device = (audio_devices_t)0); 645 646 // Mute or unmute the stream on the specified output 647 void setStreamMute(audio_stream_type_t stream, 648 bool on, 649 audio_io_handle_t output, 650 int delayMs = 0, 651 audio_devices_t device = (audio_devices_t)0); 652 653 // handle special cases for sonification strategy while in call: mute streams or replace by 654 // a special tone in the device used for communication 655 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 656 657 // true if device is in a telephony or VoIP call 658 virtual bool isInCall(); 659 660 // true if given state represents a device in a telephony or VoIP call 661 virtual bool isStateInCall(int state); 662 663 // when a device is connected, checks if an open output can be routed 664 // to this device. If none is open, tries to open one of the available outputs. 665 // Returns an output suitable to this device or 0. 666 // when a device is disconnected, checks if an output is not used any more and 667 // returns its handle if any. 668 // transfers the audio tracks and effects from one output thread to another accordingly. 669 status_t checkOutputsForDevice(const sp<DeviceDescriptor> devDesc, 670 audio_policy_dev_state_t state, 671 SortedVector<audio_io_handle_t>& outputs, 672 const String8 address); 673 674 status_t checkInputsForDevice(audio_devices_t device, 675 audio_policy_dev_state_t state, 676 SortedVector<audio_io_handle_t>& inputs, 677 const String8 address); 678 679 // close an output and its companion duplicating output. 680 void closeOutput(audio_io_handle_t output); 681 682 // close an input. 683 void closeInput(audio_io_handle_t input); 684 685 // checks and if necessary changes outputs used for all strategies. 686 // must be called every time a condition that affects the output choice for a given strategy 687 // changes: connected device, phone state, force use... 688 // Must be called before updateDevicesAndOutputs() 689 void checkOutputForStrategy(routing_strategy strategy); 690 691 // Same as checkOutputForStrategy() but for a all strategies in order of priority 692 void checkOutputForAllStrategies(); 693 694 // manages A2DP output suspend/restore according to phone state and BT SCO usage 695 void checkA2dpSuspend(); 696 697 // returns the A2DP output handle if it is open or 0 otherwise 698 audio_io_handle_t getA2dpOutput(); 699 700 // selects the most appropriate device on output for current state 701 // must be called every time a condition that affects the device choice for a given output is 702 // changed: connected device, phone state, force use, output start, output stop.. 703 // see getDeviceForStrategy() for the use of fromCache parameter 704 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 705 706 // updates cache of device used by all strategies (mDeviceForStrategy[]) 707 // must be called every time a condition that affects the device choice for a given strategy is 708 // changed: connected device, phone state, force use... 709 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 710 // Must be called after checkOutputForAllStrategies() 711 void updateDevicesAndOutputs(); 712 713 // selects the most appropriate device on input for current state 714 audio_devices_t getNewInputDevice(audio_io_handle_t input); 715 716 virtual uint32_t getMaxEffectsCpuLoad(); 717 virtual uint32_t getMaxEffectsMemory(); 718#ifdef AUDIO_POLICY_TEST 719 virtual bool threadLoop(); 720 void exit(); 721 int testOutputIndex(audio_io_handle_t output); 722#endif //AUDIO_POLICY_TEST 723 724 status_t setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled); 725 726 // returns the category the device belongs to with regard to volume curve management 727 static device_category getDeviceCategory(audio_devices_t device); 728 729 // extract one device relevant for volume control from multiple device selection 730 static audio_devices_t getDeviceForVolume(audio_devices_t device); 731 732 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 733 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs); 734 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 735 SortedVector<audio_io_handle_t>& outputs2); 736 737 // mute/unmute strategies using an incompatible device combination 738 // if muting, wait for the audio in pcm buffer to be drained before proceeding 739 // if unmuting, unmute only after the specified delay 740 // Returns the number of ms waited 741 virtual uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 742 audio_devices_t prevDevice, 743 uint32_t delayMs); 744 745 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 746 audio_output_flags_t flags, 747 audio_format_t format); 748 // samplingRate parameter is an in/out and so may be modified 749 sp<IOProfile> getInputProfile(audio_devices_t device, 750 String8 address, 751 uint32_t& samplingRate, 752 audio_format_t format, 753 audio_channel_mask_t channelMask, 754 audio_input_flags_t flags); 755 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 756 uint32_t samplingRate, 757 audio_format_t format, 758 audio_channel_mask_t channelMask, 759 audio_output_flags_t flags); 760 761 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 762 763 bool isNonOffloadableEffectEnabled(); 764 765 status_t addAudioPatch(audio_patch_handle_t handle, 766 const sp<AudioPatch>& patch); 767 status_t removeAudioPatch(audio_patch_handle_t handle); 768 769 sp<AudioOutputDescriptor> getOutputFromId(audio_port_handle_t id) const; 770 sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const; 771 sp<HwModule> getModuleForDevice(audio_devices_t device) const; 772 sp<HwModule> getModuleFromName(const char *name) const; 773 audio_devices_t availablePrimaryOutputDevices(); 774 audio_devices_t availablePrimaryInputDevices(); 775 776 void updateCallRouting(audio_devices_t rxDevice, int delayMs = 0); 777 778 // 779 // Audio policy configuration file parsing (audio_policy.conf) 780 // 781 static uint32_t stringToEnum(const struct StringToEnum *table, 782 size_t size, 783 const char *name); 784 static const char *enumToString(const struct StringToEnum *table, 785 size_t size, 786 uint32_t value); 787 static bool stringToBool(const char *value); 788 static uint32_t parseOutputFlagNames(char *name); 789 static uint32_t parseInputFlagNames(char *name); 790 static audio_devices_t parseDeviceNames(char *name); 791 void loadHwModule(cnode *root); 792 void loadHwModules(cnode *root); 793 void loadGlobalConfig(cnode *root, const sp<HwModule>& module); 794 status_t loadAudioPolicyConfig(const char *path); 795 void defaultAudioPolicyConfig(void); 796 797 798 uid_t mUidCached; 799 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 800 audio_io_handle_t mPrimaryOutput; // primary output handle 801 // list of descriptors for outputs currently opened 802 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mOutputs; 803 // copy of mOutputs before setDeviceConnectionState() opens new outputs 804 // reset to mOutputs when updateDevicesAndOutputs() is called. 805 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mPreviousOutputs; 806 DefaultKeyedVector<audio_io_handle_t, sp<AudioInputDescriptor> > mInputs; // list of input descriptors 807 DeviceVector mAvailableOutputDevices; // all available output devices 808 DeviceVector mAvailableInputDevices; // all available input devices 809 int mPhoneState; // current phone state 810 audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT]; // current forced use configuration 811 812 StreamDescriptor mStreams[AUDIO_STREAM_CNT]; // stream descriptors for volume control 813 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 814 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 815 float mLastVoiceVolume; // last voice volume value sent to audio HAL 816 817 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 818 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 819 // Maximum memory allocated to audio effects in KB 820 static const uint32_t MAX_EFFECTS_MEMORY = 512; 821 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 822 uint32_t mTotalEffectsMemory; // current memory used by effects 823 KeyedVector<int, sp<EffectDescriptor> > mEffects; // list of registered audio effects 824 bool mA2dpSuspended; // true if A2DP output is suspended 825 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 826 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 827 // to boost soft sounds, used to adjust volume curves accordingly 828 829 Vector < sp<HwModule> > mHwModules; 830 volatile int32_t mNextUniqueId; 831 volatile int32_t mAudioPortGeneration; 832 833 DefaultKeyedVector<audio_patch_handle_t, sp<AudioPatch> > mAudioPatches; 834 835 DefaultKeyedVector<audio_session_t, audio_io_handle_t> mSoundTriggerSessions; 836 837 sp<AudioPatch> mCallTxPatch; 838 sp<AudioPatch> mCallRxPatch; 839 840 // for supporting "beacon" streams, i.e. streams that only play on speaker, and never 841 // when something other than STREAM_TTS (a.k.a. "Transmitted Through Speaker") is playing 842 enum { 843 STARTING_OUTPUT, 844 STARTING_BEACON, 845 STOPPING_OUTPUT, 846 STOPPING_BEACON 847 }; 848 uint32_t mBeaconMuteRefCount; // ref count for stream that would mute beacon 849 uint32_t mBeaconPlayingRefCount;// ref count for the playing beacon streams 850 bool mBeaconMuted; // has STREAM_TTS been muted 851 852 // custom mix entry in mPolicyMixes 853 class AudioPolicyMix : public RefBase { 854 public: 855 AudioPolicyMix() {} 856 857 AudioMix mMix; // Audio policy mix descriptor 858 sp<AudioOutputDescriptor> mOutput; // Corresponding output stream 859 }; 860 DefaultKeyedVector<String8, sp<AudioPolicyMix> > mPolicyMixes; // list of registered mixes 861 862 863#ifdef AUDIO_POLICY_TEST 864 Mutex mLock; 865 Condition mWaitWorkCV; 866 867 int mCurOutput; 868 bool mDirectOutput; 869 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 870 int mTestInput; 871 uint32_t mTestDevice; 872 uint32_t mTestSamplingRate; 873 uint32_t mTestFormat; 874 uint32_t mTestChannels; 875 uint32_t mTestLatencyMs; 876#endif //AUDIO_POLICY_TEST 877 static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, 878 int indexInUi); 879private: 880 // updates device caching and output for streams that can influence the 881 // routing of notifications 882 void handleNotificationRoutingForStream(audio_stream_type_t stream); 883 static bool isVirtualInputDevice(audio_devices_t device); 884 static bool deviceDistinguishesOnAddress(audio_devices_t device); 885 // find the outputs on a given output descriptor that have the given address. 886 // to be called on an AudioOutputDescriptor whose supported devices (as defined 887 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 888 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 889 // where addresses are used to distinguish between one connected device and another. 890 void findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/, 891 const String8 address /*in*/, 892 SortedVector<audio_io_handle_t>& outputs /*out*/); 893 uint32_t nextUniqueId(); 894 uint32_t nextAudioPortGeneration(); 895 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 896 // internal method to return the output handle for the given device and format 897 audio_io_handle_t getOutputForDevice( 898 audio_devices_t device, 899 audio_session_t session, 900 audio_stream_type_t stream, 901 uint32_t samplingRate, 902 audio_format_t format, 903 audio_channel_mask_t channelMask, 904 audio_output_flags_t flags, 905 const audio_offload_info_t *offloadInfo); 906 // internal function to derive a stream type value from audio attributes 907 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 908 // return true if any output is playing anything besides the stream to ignore 909 bool isAnyOutputActive(audio_stream_type_t streamToIgnore); 910 // event is one of STARTING_OUTPUT, STARTING_BEACON, STOPPING_OUTPUT, STOPPING_BEACON 911 // returns 0 if no mute/unmute event happened, the largest latency of the device where 912 // the mute/unmute happened 913 uint32_t handleEventForBeacon(int event); 914 uint32_t setBeaconMute(bool mute); 915 bool isValidAttributes(const audio_attributes_t *paa); 916}; 917 918}; 919