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 input_type_t *inputType); 117 118 // indicates to the audio policy manager that the input starts being used. 119 virtual status_t startInput(audio_io_handle_t input, 120 audio_session_t session); 121 122 // indicates to the audio policy manager that the input stops being used. 123 virtual status_t stopInput(audio_io_handle_t input, 124 audio_session_t session); 125 virtual void releaseInput(audio_io_handle_t input, 126 audio_session_t session); 127 virtual void closeAllInputs(); 128 virtual void initStreamVolume(audio_stream_type_t stream, 129 int indexMin, 130 int indexMax); 131 virtual status_t setStreamVolumeIndex(audio_stream_type_t stream, 132 int index, 133 audio_devices_t device); 134 virtual status_t getStreamVolumeIndex(audio_stream_type_t stream, 135 int *index, 136 audio_devices_t device); 137 138 // return the strategy corresponding to a given stream type 139 virtual uint32_t getStrategyForStream(audio_stream_type_t stream); 140 // return the strategy corresponding to the given audio attributes 141 virtual uint32_t getStrategyForAttr(const audio_attributes_t *attr); 142 143 // return the enabled output devices for the given stream type 144 virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream); 145 146 virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc = NULL); 147 virtual status_t registerEffect(const effect_descriptor_t *desc, 148 audio_io_handle_t io, 149 uint32_t strategy, 150 int session, 151 int id); 152 virtual status_t unregisterEffect(int id); 153 virtual status_t setEffectEnabled(int id, bool enabled); 154 155 virtual bool isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 156 // return whether a stream is playing remotely, override to change the definition of 157 // local/remote playback, used for instance by notification manager to not make 158 // media players lose audio focus when not playing locally 159 // For the base implementation, "remotely" means playing during screen mirroring which 160 // uses an output for playback with a non-empty, non "0" address. 161 virtual bool isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 162 virtual bool isSourceActive(audio_source_t source) const; 163 164 virtual status_t dump(int fd); 165 166 virtual bool isOffloadSupported(const audio_offload_info_t& offloadInfo); 167 168 virtual status_t listAudioPorts(audio_port_role_t role, 169 audio_port_type_t type, 170 unsigned int *num_ports, 171 struct audio_port *ports, 172 unsigned int *generation); 173 virtual status_t getAudioPort(struct audio_port *port); 174 virtual status_t createAudioPatch(const struct audio_patch *patch, 175 audio_patch_handle_t *handle, 176 uid_t uid); 177 virtual status_t releaseAudioPatch(audio_patch_handle_t handle, 178 uid_t uid); 179 virtual status_t listAudioPatches(unsigned int *num_patches, 180 struct audio_patch *patches, 181 unsigned int *generation); 182 virtual status_t setAudioPortConfig(const struct audio_port_config *config); 183 virtual void clearAudioPatches(uid_t uid); 184 185 virtual status_t acquireSoundTriggerSession(audio_session_t *session, 186 audio_io_handle_t *ioHandle, 187 audio_devices_t *device); 188 189 virtual status_t releaseSoundTriggerSession(audio_session_t session); 190 191 virtual status_t registerPolicyMixes(Vector<AudioMix> mixes); 192 virtual status_t unregisterPolicyMixes(Vector<AudioMix> mixes); 193 194protected: 195 196 enum routing_strategy { 197 STRATEGY_MEDIA, 198 STRATEGY_PHONE, 199 STRATEGY_SONIFICATION, 200 STRATEGY_SONIFICATION_RESPECTFUL, 201 STRATEGY_DTMF, 202 STRATEGY_ENFORCED_AUDIBLE, 203 STRATEGY_TRANSMITTED_THROUGH_SPEAKER, 204 STRATEGY_ACCESSIBILITY, 205 STRATEGY_REROUTING, 206 NUM_STRATEGIES 207 }; 208 209 // 4 points to define the volume attenuation curve, each characterized by the volume 210 // index (from 0 to 100) at which they apply, and the attenuation in dB at that index. 211 // we use 100 steps to avoid rounding errors when computing the volume in volIndexToAmpl() 212 213 enum { VOLMIN = 0, VOLKNEE1 = 1, VOLKNEE2 = 2, VOLMAX = 3, VOLCNT = 4}; 214 215 class VolumeCurvePoint 216 { 217 public: 218 int mIndex; 219 float mDBAttenuation; 220 }; 221 222 // device categories used for volume curve management. 223 enum device_category { 224 DEVICE_CATEGORY_HEADSET, 225 DEVICE_CATEGORY_SPEAKER, 226 DEVICE_CATEGORY_EARPIECE, 227 DEVICE_CATEGORY_EXT_MEDIA, 228 DEVICE_CATEGORY_CNT 229 }; 230 231 class HwModule; 232 233 class AudioGain: public RefBase 234 { 235 public: 236 AudioGain(int index, bool useInChannelMask); 237 virtual ~AudioGain() {} 238 239 void dump(int fd, int spaces, int index) const; 240 241 void getDefaultConfig(struct audio_gain_config *config); 242 status_t checkConfig(const struct audio_gain_config *config); 243 int mIndex; 244 struct audio_gain mGain; 245 bool mUseInChannelMask; 246 }; 247 248 class AudioPort: public virtual RefBase 249 { 250 public: 251 AudioPort(const String8& name, audio_port_type_t type, 252 audio_port_role_t role, const sp<HwModule>& module); 253 virtual ~AudioPort() {} 254 255 virtual void toAudioPort(struct audio_port *port) const; 256 257 void importAudioPort(const sp<AudioPort> port); 258 void clearCapabilities(); 259 260 void loadSamplingRates(char *name); 261 void loadFormats(char *name); 262 void loadOutChannels(char *name); 263 void loadInChannels(char *name); 264 265 audio_gain_mode_t loadGainMode(char *name); 266 void loadGain(cnode *root, int index); 267 virtual void loadGains(cnode *root); 268 269 // searches for an exact match 270 status_t checkExactSamplingRate(uint32_t samplingRate) const; 271 // searches for a compatible match, and returns the best match via updatedSamplingRate 272 status_t checkCompatibleSamplingRate(uint32_t samplingRate, 273 uint32_t *updatedSamplingRate) const; 274 // searches for an exact match 275 status_t checkExactChannelMask(audio_channel_mask_t channelMask) const; 276 // searches for a compatible match, currently implemented for input channel masks only 277 status_t checkCompatibleChannelMask(audio_channel_mask_t channelMask) const; 278 status_t checkFormat(audio_format_t format) const; 279 status_t checkGain(const struct audio_gain_config *gainConfig, int index) const; 280 281 uint32_t pickSamplingRate() const; 282 audio_channel_mask_t pickChannelMask() const; 283 audio_format_t pickFormat() const; 284 285 static const audio_format_t sPcmFormatCompareTable[]; 286 static int compareFormats(audio_format_t format1, audio_format_t format2); 287 288 void dump(int fd, int spaces) const; 289 290 String8 mName; 291 audio_port_type_t mType; 292 audio_port_role_t mRole; 293 bool mUseInChannelMask; 294 // by convention, "0' in the first entry in mSamplingRates, mChannelMasks or mFormats 295 // indicates the supported parameters should be read from the output stream 296 // after it is opened for the first time 297 Vector <uint32_t> mSamplingRates; // supported sampling rates 298 Vector <audio_channel_mask_t> mChannelMasks; // supported channel masks 299 Vector <audio_format_t> mFormats; // supported audio formats 300 Vector < sp<AudioGain> > mGains; // gain controllers 301 sp<HwModule> mModule; // audio HW module exposing this I/O stream 302 uint32_t mFlags; // attribute flags (e.g primary output, 303 // direct output...). 304 }; 305 306 class AudioPortConfig: public virtual RefBase 307 { 308 public: 309 AudioPortConfig(); 310 virtual ~AudioPortConfig() {} 311 312 status_t applyAudioPortConfig(const struct audio_port_config *config, 313 struct audio_port_config *backupConfig = NULL); 314 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 315 const struct audio_port_config *srcConfig = NULL) const = 0; 316 virtual sp<AudioPort> getAudioPort() const = 0; 317 uint32_t mSamplingRate; 318 audio_format_t mFormat; 319 audio_channel_mask_t mChannelMask; 320 struct audio_gain_config mGain; 321 }; 322 323 324 class AudioPatch: public RefBase 325 { 326 public: 327 AudioPatch(audio_patch_handle_t handle, 328 const struct audio_patch *patch, uid_t uid) : 329 mHandle(handle), mPatch(*patch), mUid(uid), mAfPatchHandle(0) {} 330 331 status_t dump(int fd, int spaces, int index) const; 332 333 audio_patch_handle_t mHandle; 334 struct audio_patch mPatch; 335 uid_t mUid; 336 audio_patch_handle_t mAfPatchHandle; 337 }; 338 339 class DeviceDescriptor: public AudioPort, public AudioPortConfig 340 { 341 public: 342 DeviceDescriptor(const String8& name, audio_devices_t type); 343 344 virtual ~DeviceDescriptor() {} 345 346 bool equals(const sp<DeviceDescriptor>& other) const; 347 348 // AudioPortConfig 349 virtual sp<AudioPort> getAudioPort() const { return (AudioPort*) this; } 350 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 351 const struct audio_port_config *srcConfig = NULL) const; 352 353 // AudioPort 354 virtual void loadGains(cnode *root); 355 virtual void toAudioPort(struct audio_port *port) const; 356 357 status_t dump(int fd, int spaces, int index) const; 358 359 audio_devices_t mDeviceType; 360 String8 mAddress; 361 audio_port_handle_t mId; 362 }; 363 364 class DeviceVector : public SortedVector< sp<DeviceDescriptor> > 365 { 366 public: 367 DeviceVector() : SortedVector(), mDeviceTypes(AUDIO_DEVICE_NONE) {} 368 369 ssize_t add(const sp<DeviceDescriptor>& item); 370 ssize_t remove(const sp<DeviceDescriptor>& item); 371 ssize_t indexOf(const sp<DeviceDescriptor>& item) const; 372 373 audio_devices_t types() const { return mDeviceTypes; } 374 375 void loadDevicesFromType(audio_devices_t types); 376 void loadDevicesFromName(char *name, const DeviceVector& declaredDevices); 377 378 sp<DeviceDescriptor> getDevice(audio_devices_t type, String8 address) const; 379 DeviceVector getDevicesFromType(audio_devices_t types) const; 380 sp<DeviceDescriptor> getDeviceFromId(audio_port_handle_t id) const; 381 sp<DeviceDescriptor> getDeviceFromName(const String8& name) const; 382 DeviceVector getDevicesFromTypeAddr(audio_devices_t type, String8 address) 383 const; 384 385 private: 386 void refreshTypes(); 387 audio_devices_t mDeviceTypes; 388 }; 389 390 // the IOProfile class describes the capabilities of an output or input stream. 391 // It is currently assumed that all combination of listed parameters are supported. 392 // It is used by the policy manager to determine if an output or input is suitable for 393 // a given use case, open/close it accordingly and connect/disconnect audio tracks 394 // to/from it. 395 class IOProfile : public AudioPort 396 { 397 public: 398 IOProfile(const String8& name, audio_port_role_t role, const sp<HwModule>& module); 399 virtual ~IOProfile(); 400 401 // This method is used for both output and input. 402 // If parameter updatedSamplingRate is non-NULL, it is assigned the actual sample rate. 403 // For input, flags is interpreted as audio_input_flags_t. 404 // TODO: merge audio_output_flags_t and audio_input_flags_t. 405 bool isCompatibleProfile(audio_devices_t device, 406 String8 address, 407 uint32_t samplingRate, 408 uint32_t *updatedSamplingRate, 409 audio_format_t format, 410 audio_channel_mask_t channelMask, 411 uint32_t flags) const; 412 413 void dump(int fd); 414 void log(); 415 416 DeviceVector mSupportedDevices; // supported devices 417 // (devices this output can be routed to) 418 }; 419 420 class HwModule : public RefBase 421 { 422 public: 423 HwModule(const char *name); 424 ~HwModule(); 425 426 status_t loadOutput(cnode *root); 427 status_t loadInput(cnode *root); 428 status_t loadDevice(cnode *root); 429 430 status_t addOutputProfile(String8 name, const audio_config_t *config, 431 audio_devices_t device, String8 address); 432 status_t removeOutputProfile(String8 name); 433 status_t addInputProfile(String8 name, const audio_config_t *config, 434 audio_devices_t device, String8 address); 435 status_t removeInputProfile(String8 name); 436 437 void dump(int fd); 438 439 const char *const mName; // base name of the audio HW module (primary, a2dp ...) 440 uint32_t mHalVersion; // audio HAL API version 441 audio_module_handle_t mHandle; 442 Vector < sp<IOProfile> > mOutputProfiles; // output profiles exposed by this module 443 Vector < sp<IOProfile> > mInputProfiles; // input profiles exposed by this module 444 DeviceVector mDeclaredDevices; // devices declared in audio_policy.conf 445 446 }; 447 448 // default volume curve 449 static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManager::VOLCNT]; 450 // default volume curve for media strategy 451 static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 452 // volume curve for non-media audio on ext media outputs (HDMI, Line, etc) 453 static const VolumeCurvePoint sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 454 // volume curve for media strategy on speakers 455 static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 456 static const VolumeCurvePoint sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 457 // volume curve for sonification strategy on speakers 458 static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT]; 459 static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 460 static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 461 static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 462 static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 463 static const VolumeCurvePoint sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 464 static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 465 static const VolumeCurvePoint sLinearVolumeCurve[AudioPolicyManager::VOLCNT]; 466 static const VolumeCurvePoint sSilentVolumeCurve[AudioPolicyManager::VOLCNT]; 467 static const VolumeCurvePoint sFullScaleVolumeCurve[AudioPolicyManager::VOLCNT]; 468 // default volume curves per stream and device category. See initializeVolumeCurves() 469 static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][DEVICE_CATEGORY_CNT]; 470 471 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output 472 // and keep track of the usage of this output by each audio stream type. 473 class AudioOutputDescriptor: public AudioPortConfig 474 { 475 public: 476 AudioOutputDescriptor(const sp<IOProfile>& profile); 477 478 status_t dump(int fd); 479 480 audio_devices_t device() const; 481 void changeRefCount(audio_stream_type_t stream, int delta); 482 483 bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); } 484 audio_devices_t supportedDevices(); 485 uint32_t latency(); 486 bool sharesHwModuleWith(const sp<AudioOutputDescriptor> outputDesc); 487 bool isActive(uint32_t inPastMs = 0) const; 488 bool isStreamActive(audio_stream_type_t stream, 489 uint32_t inPastMs = 0, 490 nsecs_t sysTime = 0) const; 491 bool isStrategyActive(routing_strategy strategy, 492 uint32_t inPastMs = 0, 493 nsecs_t sysTime = 0) const; 494 495 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 496 const struct audio_port_config *srcConfig = NULL) const; 497 virtual sp<AudioPort> getAudioPort() const { return mProfile; } 498 void toAudioPort(struct audio_port *port) const; 499 500 audio_port_handle_t mId; 501 audio_io_handle_t mIoHandle; // output handle 502 uint32_t mLatency; // 503 audio_output_flags_t mFlags; // 504 audio_devices_t mDevice; // current device this output is routed to 505 AudioMix *mPolicyMix; // non NULL when used by a dynamic policy 506 audio_patch_handle_t mPatchHandle; 507 uint32_t mRefCount[AUDIO_STREAM_CNT]; // number of streams of each type using this output 508 nsecs_t mStopTime[AUDIO_STREAM_CNT]; 509 sp<AudioOutputDescriptor> mOutput1; // used by duplicated outputs: first output 510 sp<AudioOutputDescriptor> mOutput2; // used by duplicated outputs: second output 511 float mCurVolume[AUDIO_STREAM_CNT]; // current stream volume 512 int mMuteCount[AUDIO_STREAM_CNT]; // mute request counter 513 const sp<IOProfile> mProfile; // I/O profile this output derives from 514 bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible 515 // device selection. See checkDeviceMuteStrategies() 516 uint32_t mDirectOpenCount; // number of clients using this output (direct outputs only) 517 }; 518 519 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 520 // and keep track of the usage of this input. 521 class AudioInputDescriptor: public AudioPortConfig 522 { 523 public: 524 AudioInputDescriptor(const sp<IOProfile>& profile); 525 526 status_t dump(int fd); 527 528 audio_port_handle_t mId; 529 audio_io_handle_t mIoHandle; // input handle 530 audio_devices_t mDevice; // current device this input is routed to 531 AudioMix *mPolicyMix; // non NULL when used by a dynamic policy 532 audio_patch_handle_t mPatchHandle; 533 uint32_t mRefCount; // number of AudioRecord clients using 534 // this input 535 uint32_t mOpenRefCount; 536 audio_source_t mInputSource; // input source selected by application 537 //(mediarecorder.h) 538 const sp<IOProfile> mProfile; // I/O profile this output derives from 539 SortedVector<audio_session_t> mSessions; // audio sessions attached to this input 540 bool mIsSoundTrigger; // used by a soundtrigger capture 541 542 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 543 const struct audio_port_config *srcConfig = NULL) const; 544 virtual sp<AudioPort> getAudioPort() const { return mProfile; } 545 void toAudioPort(struct audio_port *port) const; 546 }; 547 548 // stream descriptor used for volume control 549 class StreamDescriptor 550 { 551 public: 552 StreamDescriptor(); 553 554 int getVolumeIndex(audio_devices_t device); 555 void dump(int fd); 556 557 int mIndexMin; // min volume index 558 int mIndexMax; // max volume index 559 KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device 560 bool mCanBeMuted; // true is the stream can be muted 561 562 const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT]; 563 }; 564 565 // stream descriptor used for volume control 566 class EffectDescriptor : public RefBase 567 { 568 public: 569 570 status_t dump(int fd); 571 572 int mIo; // io the effect is attached to 573 routing_strategy mStrategy; // routing strategy the effect is associated to 574 int mSession; // audio session the effect is on 575 effect_descriptor_t mDesc; // effect descriptor 576 bool mEnabled; // enabled state: CPU load being used or not 577 }; 578 579 void addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc); 580 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 581 582 // return the strategy corresponding to a given stream type 583 static routing_strategy getStrategy(audio_stream_type_t stream); 584 585 // return appropriate device for streams handled by the specified strategy according to current 586 // phone state, connected devices... 587 // if fromCache is true, the device is returned from mDeviceForStrategy[], 588 // otherwise it is determine by current state 589 // (device connected,phone state, force use, a2dp output...) 590 // This allows to: 591 // 1 speed up process when the state is stable (when starting or stopping an output) 592 // 2 access to either current device selection (fromCache == true) or 593 // "future" device selection (fromCache == false) when called from a context 594 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 595 // before updateDevicesAndOutputs() is called. 596 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 597 bool fromCache); 598 599 // change the route of the specified output. Returns the number of ms we have slept to 600 // allow new routing to take effect in certain cases. 601 virtual uint32_t setOutputDevice(audio_io_handle_t output, 602 audio_devices_t device, 603 bool force = false, 604 int delayMs = 0, 605 audio_patch_handle_t *patchHandle = NULL, 606 const char* address = NULL); 607 status_t resetOutputDevice(audio_io_handle_t output, 608 int delayMs = 0, 609 audio_patch_handle_t *patchHandle = NULL); 610 status_t setInputDevice(audio_io_handle_t input, 611 audio_devices_t device, 612 bool force = false, 613 audio_patch_handle_t *patchHandle = NULL); 614 status_t resetInputDevice(audio_io_handle_t input, 615 audio_patch_handle_t *patchHandle = NULL); 616 617 // select input device corresponding to requested audio source 618 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 619 620 // return io handle of active input or 0 if no input is active 621 // Only considers inputs from physical devices (e.g. main mic, headset mic) when 622 // ignoreVirtualInputs is true. 623 audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true); 624 625 uint32_t activeInputsCount() const; 626 627 // initialize volume curves for each strategy and device category 628 void initializeVolumeCurves(); 629 630 // compute the actual volume for a given stream according to the requested index and a particular 631 // device 632 virtual float computeVolume(audio_stream_type_t stream, int index, 633 audio_io_handle_t output, audio_devices_t device); 634 635 // check that volume change is permitted, compute and send new volume to audio hardware 636 virtual status_t checkAndSetVolume(audio_stream_type_t stream, int index, 637 audio_io_handle_t output, 638 audio_devices_t device, 639 int delayMs = 0, bool force = false); 640 641 // apply all stream volumes to the specified output and device 642 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 643 644 // Mute or unmute all streams handled by the specified strategy on the specified output 645 void setStrategyMute(routing_strategy strategy, 646 bool on, 647 audio_io_handle_t output, 648 int delayMs = 0, 649 audio_devices_t device = (audio_devices_t)0); 650 651 // Mute or unmute the stream on the specified output 652 void setStreamMute(audio_stream_type_t stream, 653 bool on, 654 audio_io_handle_t output, 655 int delayMs = 0, 656 audio_devices_t device = (audio_devices_t)0); 657 658 // handle special cases for sonification strategy while in call: mute streams or replace by 659 // a special tone in the device used for communication 660 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 661 662 // true if device is in a telephony or VoIP call 663 virtual bool isInCall(); 664 665 // true if given state represents a device in a telephony or VoIP call 666 virtual bool isStateInCall(int state); 667 668 // when a device is connected, checks if an open output can be routed 669 // to this device. If none is open, tries to open one of the available outputs. 670 // Returns an output suitable to this device or 0. 671 // when a device is disconnected, checks if an output is not used any more and 672 // returns its handle if any. 673 // transfers the audio tracks and effects from one output thread to another accordingly. 674 status_t checkOutputsForDevice(const sp<DeviceDescriptor> devDesc, 675 audio_policy_dev_state_t state, 676 SortedVector<audio_io_handle_t>& outputs, 677 const String8 address); 678 679 status_t checkInputsForDevice(audio_devices_t device, 680 audio_policy_dev_state_t state, 681 SortedVector<audio_io_handle_t>& inputs, 682 const String8 address); 683 684 // close an output and its companion duplicating output. 685 void closeOutput(audio_io_handle_t output); 686 687 // close an input. 688 void closeInput(audio_io_handle_t input); 689 690 // checks and if necessary changes outputs used for all strategies. 691 // must be called every time a condition that affects the output choice for a given strategy 692 // changes: connected device, phone state, force use... 693 // Must be called before updateDevicesAndOutputs() 694 void checkOutputForStrategy(routing_strategy strategy); 695 696 // Same as checkOutputForStrategy() but for a all strategies in order of priority 697 void checkOutputForAllStrategies(); 698 699 // manages A2DP output suspend/restore according to phone state and BT SCO usage 700 void checkA2dpSuspend(); 701 702 // returns the A2DP output handle if it is open or 0 otherwise 703 audio_io_handle_t getA2dpOutput(); 704 705 // selects the most appropriate device on output for current state 706 // must be called every time a condition that affects the device choice for a given output is 707 // changed: connected device, phone state, force use, output start, output stop.. 708 // see getDeviceForStrategy() for the use of fromCache parameter 709 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 710 711 // updates cache of device used by all strategies (mDeviceForStrategy[]) 712 // must be called every time a condition that affects the device choice for a given strategy is 713 // changed: connected device, phone state, force use... 714 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 715 // Must be called after checkOutputForAllStrategies() 716 void updateDevicesAndOutputs(); 717 718 // selects the most appropriate device on input for current state 719 audio_devices_t getNewInputDevice(audio_io_handle_t input); 720 721 virtual uint32_t getMaxEffectsCpuLoad(); 722 virtual uint32_t getMaxEffectsMemory(); 723#ifdef AUDIO_POLICY_TEST 724 virtual bool threadLoop(); 725 void exit(); 726 int testOutputIndex(audio_io_handle_t output); 727#endif //AUDIO_POLICY_TEST 728 729 status_t setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled); 730 731 // returns the category the device belongs to with regard to volume curve management 732 static device_category getDeviceCategory(audio_devices_t device); 733 734 // extract one device relevant for volume control from multiple device selection 735 static audio_devices_t getDeviceForVolume(audio_devices_t device); 736 737 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 738 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs); 739 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 740 SortedVector<audio_io_handle_t>& outputs2); 741 742 // mute/unmute strategies using an incompatible device combination 743 // if muting, wait for the audio in pcm buffer to be drained before proceeding 744 // if unmuting, unmute only after the specified delay 745 // Returns the number of ms waited 746 virtual uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 747 audio_devices_t prevDevice, 748 uint32_t delayMs); 749 750 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 751 audio_output_flags_t flags, 752 audio_format_t format); 753 // samplingRate parameter is an in/out and so may be modified 754 sp<IOProfile> getInputProfile(audio_devices_t device, 755 String8 address, 756 uint32_t& samplingRate, 757 audio_format_t format, 758 audio_channel_mask_t channelMask, 759 audio_input_flags_t flags); 760 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 761 uint32_t samplingRate, 762 audio_format_t format, 763 audio_channel_mask_t channelMask, 764 audio_output_flags_t flags); 765 766 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 767 768 bool isNonOffloadableEffectEnabled(); 769 770 virtual status_t addAudioPatch(audio_patch_handle_t handle, 771 const sp<AudioPatch>& patch); 772 virtual status_t removeAudioPatch(audio_patch_handle_t handle); 773 774 sp<AudioOutputDescriptor> getOutputFromId(audio_port_handle_t id) const; 775 sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const; 776 sp<HwModule> getModuleForDevice(audio_devices_t device) const; 777 sp<HwModule> getModuleFromName(const char *name) const; 778 audio_devices_t availablePrimaryOutputDevices(); 779 audio_devices_t availablePrimaryInputDevices(); 780 781 void updateCallRouting(audio_devices_t rxDevice, int delayMs = 0); 782 783 // 784 // Audio policy configuration file parsing (audio_policy.conf) 785 // 786 static uint32_t stringToEnum(const struct StringToEnum *table, 787 size_t size, 788 const char *name); 789 static const char *enumToString(const struct StringToEnum *table, 790 size_t size, 791 uint32_t value); 792 static bool stringToBool(const char *value); 793 static uint32_t parseOutputFlagNames(char *name); 794 static uint32_t parseInputFlagNames(char *name); 795 static audio_devices_t parseDeviceNames(char *name); 796 void loadHwModule(cnode *root); 797 void loadHwModules(cnode *root); 798 void loadGlobalConfig(cnode *root, const sp<HwModule>& module); 799 status_t loadAudioPolicyConfig(const char *path); 800 void defaultAudioPolicyConfig(void); 801 802 803 uid_t mUidCached; 804 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 805 audio_io_handle_t mPrimaryOutput; // primary output handle 806 // list of descriptors for outputs currently opened 807 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mOutputs; 808 // copy of mOutputs before setDeviceConnectionState() opens new outputs 809 // reset to mOutputs when updateDevicesAndOutputs() is called. 810 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mPreviousOutputs; 811 DefaultKeyedVector<audio_io_handle_t, sp<AudioInputDescriptor> > mInputs; // list of input descriptors 812 DeviceVector mAvailableOutputDevices; // all available output devices 813 DeviceVector mAvailableInputDevices; // all available input devices 814 int mPhoneState; // current phone state 815 audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT]; // current forced use configuration 816 817 StreamDescriptor mStreams[AUDIO_STREAM_CNT]; // stream descriptors for volume control 818 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 819 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 820 float mLastVoiceVolume; // last voice volume value sent to audio HAL 821 822 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 823 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 824 // Maximum memory allocated to audio effects in KB 825 static const uint32_t MAX_EFFECTS_MEMORY = 512; 826 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 827 uint32_t mTotalEffectsMemory; // current memory used by effects 828 KeyedVector<int, sp<EffectDescriptor> > mEffects; // list of registered audio effects 829 bool mA2dpSuspended; // true if A2DP output is suspended 830 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 831 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 832 // to boost soft sounds, used to adjust volume curves accordingly 833 834 Vector < sp<HwModule> > mHwModules; 835 volatile int32_t mNextUniqueId; 836 volatile int32_t mAudioPortGeneration; 837 838 DefaultKeyedVector<audio_patch_handle_t, sp<AudioPatch> > mAudioPatches; 839 840 DefaultKeyedVector<audio_session_t, audio_io_handle_t> mSoundTriggerSessions; 841 842 sp<AudioPatch> mCallTxPatch; 843 sp<AudioPatch> mCallRxPatch; 844 845 // for supporting "beacon" streams, i.e. streams that only play on speaker, and never 846 // when something other than STREAM_TTS (a.k.a. "Transmitted Through Speaker") is playing 847 enum { 848 STARTING_OUTPUT, 849 STARTING_BEACON, 850 STOPPING_OUTPUT, 851 STOPPING_BEACON 852 }; 853 uint32_t mBeaconMuteRefCount; // ref count for stream that would mute beacon 854 uint32_t mBeaconPlayingRefCount;// ref count for the playing beacon streams 855 bool mBeaconMuted; // has STREAM_TTS been muted 856 857 // custom mix entry in mPolicyMixes 858 class AudioPolicyMix : public RefBase { 859 public: 860 AudioPolicyMix() {} 861 862 AudioMix mMix; // Audio policy mix descriptor 863 sp<AudioOutputDescriptor> mOutput; // Corresponding output stream 864 }; 865 DefaultKeyedVector<String8, sp<AudioPolicyMix> > mPolicyMixes; // list of registered mixes 866 867 868#ifdef AUDIO_POLICY_TEST 869 Mutex mLock; 870 Condition mWaitWorkCV; 871 872 int mCurOutput; 873 bool mDirectOutput; 874 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 875 int mTestInput; 876 uint32_t mTestDevice; 877 uint32_t mTestSamplingRate; 878 uint32_t mTestFormat; 879 uint32_t mTestChannels; 880 uint32_t mTestLatencyMs; 881#endif //AUDIO_POLICY_TEST 882 static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, 883 int indexInUi); 884 static bool isVirtualInputDevice(audio_devices_t device); 885 uint32_t nextUniqueId(); 886 uint32_t nextAudioPortGeneration(); 887private: 888 // updates device caching and output for streams that can influence the 889 // routing of notifications 890 void handleNotificationRoutingForStream(audio_stream_type_t stream); 891 static bool deviceDistinguishesOnAddress(audio_devices_t device); 892 // find the outputs on a given output descriptor that have the given address. 893 // to be called on an AudioOutputDescriptor whose supported devices (as defined 894 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 895 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 896 // where addresses are used to distinguish between one connected device and another. 897 void findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/, 898 const audio_devices_t device /*in*/, 899 const String8 address /*in*/, 900 SortedVector<audio_io_handle_t>& outputs /*out*/); 901 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 902 // internal method to return the output handle for the given device and format 903 audio_io_handle_t getOutputForDevice( 904 audio_devices_t device, 905 audio_session_t session, 906 audio_stream_type_t stream, 907 uint32_t samplingRate, 908 audio_format_t format, 909 audio_channel_mask_t channelMask, 910 audio_output_flags_t flags, 911 const audio_offload_info_t *offloadInfo); 912 // internal function to derive a stream type value from audio attributes 913 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 914 // return true if any output is playing anything besides the stream to ignore 915 bool isAnyOutputActive(audio_stream_type_t streamToIgnore); 916 // event is one of STARTING_OUTPUT, STARTING_BEACON, STOPPING_OUTPUT, STOPPING_BEACON 917 // returns 0 if no mute/unmute event happened, the largest latency of the device where 918 // the mute/unmute happened 919 uint32_t handleEventForBeacon(int event); 920 uint32_t setBeaconMute(bool mute); 921 bool isValidAttributes(const audio_attributes_t *paa); 922 923 // select input device corresponding to requested audio source and return associated policy 924 // mix if any. Calls getDeviceForInputSource(). 925 audio_devices_t getDeviceAndMixForInputSource(audio_source_t inputSource, 926 AudioMix **policyMix = NULL); 927 928 // Called by setDeviceConnectionState(). 929 status_t setDeviceConnectionStateInt(audio_devices_t device, 930 audio_policy_dev_state_t state, 931 const char *device_address); 932 sp<DeviceDescriptor> getDeviceDescriptor(const audio_devices_t device, 933 const char *device_address); 934 935}; 936 937}; 938