AudioPolicyManager.h revision 4d41695d45e2c7211899afa94b20e32120b2b7e0
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 audio_io_handle_t getOutputForAttr(const audio_attributes_t *attr, 91 uint32_t samplingRate, 92 audio_format_t format, 93 audio_channel_mask_t channelMask, 94 audio_output_flags_t flags, 95 const audio_offload_info_t *offloadInfo); 96 virtual status_t startOutput(audio_io_handle_t output, 97 audio_stream_type_t stream, 98 int session = 0); 99 virtual status_t stopOutput(audio_io_handle_t output, 100 audio_stream_type_t stream, 101 int session = 0); 102 virtual void releaseOutput(audio_io_handle_t output); 103 virtual audio_io_handle_t getInput(audio_source_t inputSource, 104 uint32_t samplingRate, 105 audio_format_t format, 106 audio_channel_mask_t channelMask, 107 audio_session_t session, 108 audio_input_flags_t flags); 109 110 // indicates to the audio policy manager that the input starts being used. 111 virtual status_t startInput(audio_io_handle_t input, 112 audio_session_t session); 113 114 // indicates to the audio policy manager that the input stops being used. 115 virtual status_t stopInput(audio_io_handle_t input, 116 audio_session_t session); 117 virtual void releaseInput(audio_io_handle_t input, 118 audio_session_t session); 119 virtual void closeAllInputs(); 120 virtual void initStreamVolume(audio_stream_type_t stream, 121 int indexMin, 122 int indexMax); 123 virtual status_t setStreamVolumeIndex(audio_stream_type_t stream, 124 int index, 125 audio_devices_t device); 126 virtual status_t getStreamVolumeIndex(audio_stream_type_t stream, 127 int *index, 128 audio_devices_t device); 129 130 // return the strategy corresponding to a given stream type 131 virtual uint32_t getStrategyForStream(audio_stream_type_t stream); 132 // return the strategy corresponding to the given audio attributes 133 virtual uint32_t getStrategyForAttr(const audio_attributes_t *attr); 134 135 // return the enabled output devices for the given stream type 136 virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream); 137 138 virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc = NULL); 139 virtual status_t registerEffect(const effect_descriptor_t *desc, 140 audio_io_handle_t io, 141 uint32_t strategy, 142 int session, 143 int id); 144 virtual status_t unregisterEffect(int id); 145 virtual status_t setEffectEnabled(int id, bool enabled); 146 147 virtual bool isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 148 // return whether a stream is playing remotely, override to change the definition of 149 // local/remote playback, used for instance by notification manager to not make 150 // media players lose audio focus when not playing locally 151 virtual bool isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 152 virtual bool isSourceActive(audio_source_t source) const; 153 154 virtual status_t dump(int fd); 155 156 virtual bool isOffloadSupported(const audio_offload_info_t& offloadInfo); 157 158 virtual status_t listAudioPorts(audio_port_role_t role, 159 audio_port_type_t type, 160 unsigned int *num_ports, 161 struct audio_port *ports, 162 unsigned int *generation); 163 virtual status_t getAudioPort(struct audio_port *port); 164 virtual status_t createAudioPatch(const struct audio_patch *patch, 165 audio_patch_handle_t *handle, 166 uid_t uid); 167 virtual status_t releaseAudioPatch(audio_patch_handle_t handle, 168 uid_t uid); 169 virtual status_t listAudioPatches(unsigned int *num_patches, 170 struct audio_patch *patches, 171 unsigned int *generation); 172 virtual status_t setAudioPortConfig(const struct audio_port_config *config); 173 virtual void clearAudioPatches(uid_t uid); 174 175 virtual status_t acquireSoundTriggerSession(audio_session_t *session, 176 audio_io_handle_t *ioHandle, 177 audio_devices_t *device); 178 179 virtual status_t releaseSoundTriggerSession(audio_session_t session); 180 181protected: 182 183 enum routing_strategy { 184 STRATEGY_MEDIA, 185 STRATEGY_PHONE, 186 STRATEGY_SONIFICATION, 187 STRATEGY_SONIFICATION_RESPECTFUL, 188 STRATEGY_DTMF, 189 STRATEGY_ENFORCED_AUDIBLE, 190 NUM_STRATEGIES 191 }; 192 193 // 4 points to define the volume attenuation curve, each characterized by the volume 194 // index (from 0 to 100) at which they apply, and the attenuation in dB at that index. 195 // we use 100 steps to avoid rounding errors when computing the volume in volIndexToAmpl() 196 197 enum { VOLMIN = 0, VOLKNEE1 = 1, VOLKNEE2 = 2, VOLMAX = 3, VOLCNT = 4}; 198 199 class VolumeCurvePoint 200 { 201 public: 202 int mIndex; 203 float mDBAttenuation; 204 }; 205 206 // device categories used for volume curve management. 207 enum device_category { 208 DEVICE_CATEGORY_HEADSET, 209 DEVICE_CATEGORY_SPEAKER, 210 DEVICE_CATEGORY_EARPIECE, 211 DEVICE_CATEGORY_EXT_MEDIA, 212 DEVICE_CATEGORY_CNT 213 }; 214 215 class HwModule; 216 217 class AudioGain: public RefBase 218 { 219 public: 220 AudioGain(int index, bool useInChannelMask); 221 virtual ~AudioGain() {} 222 223 void dump(int fd, int spaces, int index) const; 224 225 void getDefaultConfig(struct audio_gain_config *config); 226 status_t checkConfig(const struct audio_gain_config *config); 227 int mIndex; 228 struct audio_gain mGain; 229 bool mUseInChannelMask; 230 }; 231 232 class AudioPort: public virtual RefBase 233 { 234 public: 235 AudioPort(const String8& name, audio_port_type_t type, 236 audio_port_role_t role, const sp<HwModule>& module); 237 virtual ~AudioPort() {} 238 239 virtual void toAudioPort(struct audio_port *port) const; 240 241 void loadSamplingRates(char *name); 242 void loadFormats(char *name); 243 void loadOutChannels(char *name); 244 void loadInChannels(char *name); 245 246 audio_gain_mode_t loadGainMode(char *name); 247 void loadGain(cnode *root, int index); 248 void loadGains(cnode *root); 249 250 // searches for an exact match 251 status_t checkExactSamplingRate(uint32_t samplingRate) const; 252 // searches for a compatible match, and returns the best match via updatedSamplingRate 253 status_t checkCompatibleSamplingRate(uint32_t samplingRate, 254 uint32_t *updatedSamplingRate) const; 255 // searches for an exact match 256 status_t checkExactChannelMask(audio_channel_mask_t channelMask) const; 257 // searches for a compatible match, currently implemented for input channel masks only 258 status_t checkCompatibleChannelMask(audio_channel_mask_t channelMask) const; 259 status_t checkFormat(audio_format_t format) const; 260 status_t checkGain(const struct audio_gain_config *gainConfig, int index) const; 261 262 uint32_t pickSamplingRate() const; 263 audio_channel_mask_t pickChannelMask() const; 264 audio_format_t pickFormat() const; 265 266 static const audio_format_t sPcmFormatCompareTable[]; 267 static int compareFormats(audio_format_t format1, audio_format_t format2); 268 269 void dump(int fd, int spaces) const; 270 271 String8 mName; 272 audio_port_type_t mType; 273 audio_port_role_t mRole; 274 bool mUseInChannelMask; 275 // by convention, "0' in the first entry in mSamplingRates, mChannelMasks or mFormats 276 // indicates the supported parameters should be read from the output stream 277 // after it is opened for the first time 278 Vector <uint32_t> mSamplingRates; // supported sampling rates 279 Vector <audio_channel_mask_t> mChannelMasks; // supported channel masks 280 Vector <audio_format_t> mFormats; // supported audio formats 281 Vector < sp<AudioGain> > mGains; // gain controllers 282 sp<HwModule> mModule; // audio HW module exposing this I/O stream 283 audio_output_flags_t mFlags; // attribute flags (e.g primary output, 284 // direct output...). For outputs only. 285 }; 286 287 class AudioPortConfig: public virtual RefBase 288 { 289 public: 290 AudioPortConfig(); 291 virtual ~AudioPortConfig() {} 292 293 status_t applyAudioPortConfig(const struct audio_port_config *config, 294 struct audio_port_config *backupConfig = NULL); 295 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 296 const struct audio_port_config *srcConfig = NULL) const = 0; 297 sp<AudioPort> mAudioPort; 298 uint32_t mSamplingRate; 299 audio_format_t mFormat; 300 audio_channel_mask_t mChannelMask; 301 struct audio_gain_config mGain; 302 }; 303 304 305 class AudioPatch: public RefBase 306 { 307 public: 308 AudioPatch(audio_patch_handle_t handle, 309 const struct audio_patch *patch, uid_t uid) : 310 mHandle(handle), mPatch(*patch), mUid(uid), mAfPatchHandle(0) {} 311 312 status_t dump(int fd, int spaces, int index) const; 313 314 audio_patch_handle_t mHandle; 315 struct audio_patch mPatch; 316 uid_t mUid; 317 audio_patch_handle_t mAfPatchHandle; 318 }; 319 320 class DeviceDescriptor: public AudioPort, public AudioPortConfig 321 { 322 public: 323 DeviceDescriptor(const String8& name, audio_devices_t type); 324 325 virtual ~DeviceDescriptor() {} 326 327 bool equals(const sp<DeviceDescriptor>& other) const; 328 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 329 const struct audio_port_config *srcConfig = NULL) const; 330 331 virtual void toAudioPort(struct audio_port *port) const; 332 333 status_t dump(int fd, int spaces, int index) const; 334 335 audio_devices_t mDeviceType; 336 String8 mAddress; 337 audio_port_handle_t mId; 338 }; 339 340 class DeviceVector : public SortedVector< sp<DeviceDescriptor> > 341 { 342 public: 343 DeviceVector() : SortedVector(), mDeviceTypes(AUDIO_DEVICE_NONE) {} 344 345 ssize_t add(const sp<DeviceDescriptor>& item); 346 ssize_t remove(const sp<DeviceDescriptor>& item); 347 ssize_t indexOf(const sp<DeviceDescriptor>& item) const; 348 349 audio_devices_t types() const { return mDeviceTypes; } 350 351 void loadDevicesFromType(audio_devices_t types); 352 void loadDevicesFromName(char *name, const DeviceVector& declaredDevices); 353 354 sp<DeviceDescriptor> getDevice(audio_devices_t type, String8 address) const; 355 DeviceVector getDevicesFromType(audio_devices_t types) const; 356 sp<DeviceDescriptor> getDeviceFromId(audio_port_handle_t id) const; 357 sp<DeviceDescriptor> getDeviceFromName(const String8& name) const; 358 DeviceVector getDevicesFromTypeAddr(audio_devices_t type, String8 address) 359 const; 360 361 private: 362 void refreshTypes(); 363 audio_devices_t mDeviceTypes; 364 }; 365 366 // the IOProfile class describes the capabilities of an output or input stream. 367 // It is currently assumed that all combination of listed parameters are supported. 368 // It is used by the policy manager to determine if an output or input is suitable for 369 // a given use case, open/close it accordingly and connect/disconnect audio tracks 370 // to/from it. 371 class IOProfile : public AudioPort 372 { 373 public: 374 IOProfile(const String8& name, audio_port_role_t role, const sp<HwModule>& module); 375 virtual ~IOProfile(); 376 377 // This method is used for both output and input. 378 // If parameter updatedSamplingRate is non-NULL, it is assigned the actual sample rate. 379 // For input, flags is interpreted as audio_input_flags_t. 380 // TODO: merge audio_output_flags_t and audio_input_flags_t. 381 bool isCompatibleProfile(audio_devices_t device, 382 uint32_t samplingRate, 383 uint32_t *updatedSamplingRate, 384 audio_format_t format, 385 audio_channel_mask_t channelMask, 386 audio_output_flags_t flags) const; 387 388 void dump(int fd); 389 void log(); 390 391 DeviceVector mSupportedDevices; // supported devices 392 // (devices this output can be routed to) 393 }; 394 395 class HwModule : public RefBase 396 { 397 public: 398 HwModule(const char *name); 399 ~HwModule(); 400 401 status_t loadOutput(cnode *root); 402 status_t loadInput(cnode *root); 403 status_t loadDevice(cnode *root); 404 405 void dump(int fd); 406 407 const char *const mName; // base name of the audio HW module (primary, a2dp ...) 408 uint32_t mHalVersion; // audio HAL API version 409 audio_module_handle_t mHandle; 410 Vector < sp<IOProfile> > mOutputProfiles; // output profiles exposed by this module 411 Vector < sp<IOProfile> > mInputProfiles; // input profiles exposed by this module 412 DeviceVector mDeclaredDevices; // devices declared in audio_policy.conf 413 414 }; 415 416 // default volume curve 417 static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManager::VOLCNT]; 418 // default volume curve for media strategy 419 static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 420 // volume curve for non-media audio on ext media outputs (HDMI, Line, etc) 421 static const VolumeCurvePoint sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 422 // volume curve for media strategy on speakers 423 static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 424 static const VolumeCurvePoint sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 425 // volume curve for sonification strategy on speakers 426 static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT]; 427 static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 428 static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 429 static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 430 static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 431 static const VolumeCurvePoint sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 432 static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 433 // default volume curves per stream and device category. See initializeVolumeCurves() 434 static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][DEVICE_CATEGORY_CNT]; 435 436 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output 437 // and keep track of the usage of this output by each audio stream type. 438 class AudioOutputDescriptor: public AudioPortConfig 439 { 440 public: 441 AudioOutputDescriptor(const sp<IOProfile>& profile); 442 443 status_t dump(int fd); 444 445 audio_devices_t device() const; 446 void changeRefCount(audio_stream_type_t stream, int delta); 447 448 bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); } 449 audio_devices_t supportedDevices(); 450 uint32_t latency(); 451 bool sharesHwModuleWith(const sp<AudioOutputDescriptor> outputDesc); 452 bool isActive(uint32_t inPastMs = 0) const; 453 bool isStreamActive(audio_stream_type_t stream, 454 uint32_t inPastMs = 0, 455 nsecs_t sysTime = 0) const; 456 bool isStrategyActive(routing_strategy strategy, 457 uint32_t inPastMs = 0, 458 nsecs_t sysTime = 0) const; 459 460 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 461 const struct audio_port_config *srcConfig = NULL) const; 462 void toAudioPort(struct audio_port *port) const; 463 464 audio_port_handle_t mId; 465 audio_io_handle_t mIoHandle; // output handle 466 uint32_t mLatency; // 467 audio_output_flags_t mFlags; // 468 audio_devices_t mDevice; // current device this output is routed to 469 audio_patch_handle_t mPatchHandle; 470 uint32_t mRefCount[AUDIO_STREAM_CNT]; // number of streams of each type using this output 471 nsecs_t mStopTime[AUDIO_STREAM_CNT]; 472 sp<AudioOutputDescriptor> mOutput1; // used by duplicated outputs: first output 473 sp<AudioOutputDescriptor> mOutput2; // used by duplicated outputs: second output 474 float mCurVolume[AUDIO_STREAM_CNT]; // current stream volume 475 int mMuteCount[AUDIO_STREAM_CNT]; // mute request counter 476 const sp<IOProfile> mProfile; // I/O profile this output derives from 477 bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible 478 // device selection. See checkDeviceMuteStrategies() 479 uint32_t mDirectOpenCount; // number of clients using this output (direct outputs only) 480 }; 481 482 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 483 // and keep track of the usage of this input. 484 class AudioInputDescriptor: public AudioPortConfig 485 { 486 public: 487 AudioInputDescriptor(const sp<IOProfile>& profile); 488 489 status_t dump(int fd); 490 491 audio_port_handle_t mId; 492 audio_io_handle_t mIoHandle; // input handle 493 audio_devices_t mDevice; // current device this input is routed to 494 audio_patch_handle_t mPatchHandle; 495 uint32_t mRefCount; // number of AudioRecord clients using 496 // this input 497 uint32_t mOpenRefCount; 498 audio_source_t mInputSource; // input source selected by application 499 //(mediarecorder.h) 500 const sp<IOProfile> mProfile; // I/O profile this output derives from 501 SortedVector<audio_session_t> mSessions; // audio sessions attached to this input 502 bool mIsSoundTrigger; // used by a soundtrigger capture 503 504 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 505 const struct audio_port_config *srcConfig = NULL) const; 506 void toAudioPort(struct audio_port *port) const; 507 }; 508 509 // stream descriptor used for volume control 510 class StreamDescriptor 511 { 512 public: 513 StreamDescriptor(); 514 515 int getVolumeIndex(audio_devices_t device); 516 void dump(int fd); 517 518 int mIndexMin; // min volume index 519 int mIndexMax; // max volume index 520 KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device 521 bool mCanBeMuted; // true is the stream can be muted 522 523 const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT]; 524 }; 525 526 // stream descriptor used for volume control 527 class EffectDescriptor : public RefBase 528 { 529 public: 530 531 status_t dump(int fd); 532 533 int mIo; // io the effect is attached to 534 routing_strategy mStrategy; // routing strategy the effect is associated to 535 int mSession; // audio session the effect is on 536 effect_descriptor_t mDesc; // effect descriptor 537 bool mEnabled; // enabled state: CPU load being used or not 538 }; 539 540 void addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc); 541 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 542 543 // return the strategy corresponding to a given stream type 544 static routing_strategy getStrategy(audio_stream_type_t stream); 545 546 // return appropriate device for streams handled by the specified strategy according to current 547 // phone state, connected devices... 548 // if fromCache is true, the device is returned from mDeviceForStrategy[], 549 // otherwise it is determine by current state 550 // (device connected,phone state, force use, a2dp output...) 551 // This allows to: 552 // 1 speed up process when the state is stable (when starting or stopping an output) 553 // 2 access to either current device selection (fromCache == true) or 554 // "future" device selection (fromCache == false) when called from a context 555 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 556 // before updateDevicesAndOutputs() is called. 557 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 558 bool fromCache); 559 560 // change the route of the specified output. Returns the number of ms we have slept to 561 // allow new routing to take effect in certain cases. 562 uint32_t setOutputDevice(audio_io_handle_t output, 563 audio_devices_t device, 564 bool force = false, 565 int delayMs = 0, 566 audio_patch_handle_t *patchHandle = NULL, 567 const char* address = NULL); 568 status_t resetOutputDevice(audio_io_handle_t output, 569 int delayMs = 0, 570 audio_patch_handle_t *patchHandle = NULL); 571 status_t setInputDevice(audio_io_handle_t input, 572 audio_devices_t device, 573 bool force = false, 574 audio_patch_handle_t *patchHandle = NULL); 575 status_t resetInputDevice(audio_io_handle_t input, 576 audio_patch_handle_t *patchHandle = NULL); 577 578 // select input device corresponding to requested audio source 579 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 580 581 // return io handle of active input or 0 if no input is active 582 // Only considers inputs from physical devices (e.g. main mic, headset mic) when 583 // ignoreVirtualInputs is true. 584 audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true); 585 586 uint32_t activeInputsCount() const; 587 588 // initialize volume curves for each strategy and device category 589 void initializeVolumeCurves(); 590 591 // compute the actual volume for a given stream according to the requested index and a particular 592 // device 593 virtual float computeVolume(audio_stream_type_t stream, int index, 594 audio_io_handle_t output, audio_devices_t device); 595 596 // check that volume change is permitted, compute and send new volume to audio hardware 597 status_t checkAndSetVolume(audio_stream_type_t stream, int index, audio_io_handle_t output, 598 audio_devices_t device, int delayMs = 0, bool force = false); 599 600 // apply all stream volumes to the specified output and device 601 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 602 603 // Mute or unmute all streams handled by the specified strategy on the specified output 604 void setStrategyMute(routing_strategy strategy, 605 bool on, 606 audio_io_handle_t output, 607 int delayMs = 0, 608 audio_devices_t device = (audio_devices_t)0); 609 610 // Mute or unmute the stream on the specified output 611 void setStreamMute(audio_stream_type_t stream, 612 bool on, 613 audio_io_handle_t output, 614 int delayMs = 0, 615 audio_devices_t device = (audio_devices_t)0); 616 617 // handle special cases for sonification strategy while in call: mute streams or replace by 618 // a special tone in the device used for communication 619 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 620 621 // true if device is in a telephony or VoIP call 622 virtual bool isInCall(); 623 624 // true if given state represents a device in a telephony or VoIP call 625 virtual bool isStateInCall(int state); 626 627 // when a device is connected, checks if an open output can be routed 628 // to this device. If none is open, tries to open one of the available outputs. 629 // Returns an output suitable to this device or 0. 630 // when a device is disconnected, checks if an output is not used any more and 631 // returns its handle if any. 632 // transfers the audio tracks and effects from one output thread to another accordingly. 633 status_t checkOutputsForDevice(audio_devices_t device, 634 audio_policy_dev_state_t state, 635 SortedVector<audio_io_handle_t>& outputs, 636 const String8 address); 637 638 status_t checkInputsForDevice(audio_devices_t device, 639 audio_policy_dev_state_t state, 640 SortedVector<audio_io_handle_t>& inputs, 641 const String8 address); 642 643 // close an output and its companion duplicating output. 644 void closeOutput(audio_io_handle_t output); 645 646 // checks and if necessary changes outputs used for all strategies. 647 // must be called every time a condition that affects the output choice for a given strategy 648 // changes: connected device, phone state, force use... 649 // Must be called before updateDevicesAndOutputs() 650 void checkOutputForStrategy(routing_strategy strategy); 651 652 // Same as checkOutputForStrategy() but for a all strategies in order of priority 653 void checkOutputForAllStrategies(); 654 655 // manages A2DP output suspend/restore according to phone state and BT SCO usage 656 void checkA2dpSuspend(); 657 658 // returns the A2DP output handle if it is open or 0 otherwise 659 audio_io_handle_t getA2dpOutput(); 660 661 // selects the most appropriate device on output for current state 662 // must be called every time a condition that affects the device choice for a given output is 663 // changed: connected device, phone state, force use, output start, output stop.. 664 // see getDeviceForStrategy() for the use of fromCache parameter 665 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 666 667 // updates cache of device used by all strategies (mDeviceForStrategy[]) 668 // must be called every time a condition that affects the device choice for a given strategy is 669 // changed: connected device, phone state, force use... 670 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 671 // Must be called after checkOutputForAllStrategies() 672 void updateDevicesAndOutputs(); 673 674 // selects the most appropriate device on input for current state 675 audio_devices_t getNewInputDevice(audio_io_handle_t input); 676 677 virtual uint32_t getMaxEffectsCpuLoad(); 678 virtual uint32_t getMaxEffectsMemory(); 679#ifdef AUDIO_POLICY_TEST 680 virtual bool threadLoop(); 681 void exit(); 682 int testOutputIndex(audio_io_handle_t output); 683#endif //AUDIO_POLICY_TEST 684 685 status_t setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled); 686 687 // returns the category the device belongs to with regard to volume curve management 688 static device_category getDeviceCategory(audio_devices_t device); 689 690 // extract one device relevant for volume control from multiple device selection 691 static audio_devices_t getDeviceForVolume(audio_devices_t device); 692 693 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 694 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs); 695 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 696 SortedVector<audio_io_handle_t>& outputs2); 697 698 // mute/unmute strategies using an incompatible device combination 699 // if muting, wait for the audio in pcm buffer to be drained before proceeding 700 // if unmuting, unmute only after the specified delay 701 // Returns the number of ms waited 702 uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 703 audio_devices_t prevDevice, 704 uint32_t delayMs); 705 706 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 707 audio_output_flags_t flags); 708 // samplingRate parameter is an in/out and so may be modified 709 sp<IOProfile> getInputProfile(audio_devices_t device, 710 uint32_t& samplingRate, 711 audio_format_t format, 712 audio_channel_mask_t channelMask, 713 audio_input_flags_t flags); 714 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 715 uint32_t samplingRate, 716 audio_format_t format, 717 audio_channel_mask_t channelMask, 718 audio_output_flags_t flags); 719 720 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 721 722 bool isNonOffloadableEffectEnabled(); 723 724 status_t addAudioPatch(audio_patch_handle_t handle, 725 const sp<AudioPatch>& patch); 726 status_t removeAudioPatch(audio_patch_handle_t handle); 727 728 sp<AudioOutputDescriptor> getOutputFromId(audio_port_handle_t id) const; 729 sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const; 730 sp<HwModule> getModuleForDevice(audio_devices_t device) const; 731 sp<HwModule> getModuleFromName(const char *name) const; 732 audio_devices_t availablePrimaryOutputDevices(); 733 audio_devices_t availablePrimaryInputDevices(); 734 735 void updateCallRouting(audio_devices_t rxDevice, int delayMs = 0); 736 737 // 738 // Audio policy configuration file parsing (audio_policy.conf) 739 // 740 static uint32_t stringToEnum(const struct StringToEnum *table, 741 size_t size, 742 const char *name); 743 static const char *enumToString(const struct StringToEnum *table, 744 size_t size, 745 uint32_t value); 746 static bool stringToBool(const char *value); 747 static audio_output_flags_t parseFlagNames(char *name); 748 static audio_devices_t parseDeviceNames(char *name); 749 void loadHwModule(cnode *root); 750 void loadHwModules(cnode *root); 751 void loadGlobalConfig(cnode *root, const sp<HwModule>& module); 752 status_t loadAudioPolicyConfig(const char *path); 753 void defaultAudioPolicyConfig(void); 754 755 756 uid_t mUidCached; 757 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 758 audio_io_handle_t mPrimaryOutput; // primary output handle 759 // list of descriptors for outputs currently opened 760 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mOutputs; 761 // copy of mOutputs before setDeviceConnectionState() opens new outputs 762 // reset to mOutputs when updateDevicesAndOutputs() is called. 763 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mPreviousOutputs; 764 DefaultKeyedVector<audio_io_handle_t, sp<AudioInputDescriptor> > mInputs; // list of input descriptors 765 DeviceVector mAvailableOutputDevices; // all available output devices 766 DeviceVector mAvailableInputDevices; // all available input devices 767 int mPhoneState; // current phone state 768 audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT]; // current forced use configuration 769 770 StreamDescriptor mStreams[AUDIO_STREAM_CNT]; // stream descriptors for volume control 771 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 772 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 773 float mLastVoiceVolume; // last voice volume value sent to audio HAL 774 775 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 776 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 777 // Maximum memory allocated to audio effects in KB 778 static const uint32_t MAX_EFFECTS_MEMORY = 512; 779 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 780 uint32_t mTotalEffectsMemory; // current memory used by effects 781 KeyedVector<int, sp<EffectDescriptor> > mEffects; // list of registered audio effects 782 bool mA2dpSuspended; // true if A2DP output is suspended 783 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 784 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 785 // to boost soft sounds, used to adjust volume curves accordingly 786 787 Vector < sp<HwModule> > mHwModules; 788 volatile int32_t mNextUniqueId; 789 volatile int32_t mAudioPortGeneration; 790 791 DefaultKeyedVector<audio_patch_handle_t, sp<AudioPatch> > mAudioPatches; 792 793 DefaultKeyedVector<audio_session_t, audio_io_handle_t> mSoundTriggerSessions; 794 795 sp<AudioPatch> mCallTxPatch; 796 sp<AudioPatch> mCallRxPatch; 797 798#ifdef AUDIO_POLICY_TEST 799 Mutex mLock; 800 Condition mWaitWorkCV; 801 802 int mCurOutput; 803 bool mDirectOutput; 804 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 805 int mTestInput; 806 uint32_t mTestDevice; 807 uint32_t mTestSamplingRate; 808 uint32_t mTestFormat; 809 uint32_t mTestChannels; 810 uint32_t mTestLatencyMs; 811#endif //AUDIO_POLICY_TEST 812 813private: 814 static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, 815 int indexInUi); 816 // updates device caching and output for streams that can influence the 817 // routing of notifications 818 void handleNotificationRoutingForStream(audio_stream_type_t stream); 819 static bool isVirtualInputDevice(audio_devices_t device); 820 static bool deviceDistinguishesOnAddress(audio_devices_t device); 821 // find the outputs on a given output descriptor that have the given address. 822 // to be called on an AudioOutputDescriptor whose supported devices (as defined 823 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 824 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 825 // where addresses are used to distinguish between one connected device and another. 826 void findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/, 827 const String8 address /*in*/, 828 SortedVector<audio_io_handle_t>& outputs /*out*/); 829 uint32_t nextUniqueId(); 830 uint32_t nextAudioPortGeneration(); 831 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 832 // internal method to return the output handle for the given device and format 833 audio_io_handle_t getOutputForDevice( 834 audio_devices_t device, 835 audio_stream_type_t stream, 836 uint32_t samplingRate, 837 audio_format_t format, 838 audio_channel_mask_t channelMask, 839 audio_output_flags_t flags, 840 const audio_offload_info_t *offloadInfo); 841 // internal function to derive a stream type value from audio attributes 842 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 843}; 844 845}; 846