AudioPolicyManager.h revision c2730ba7c5e9559b7499ef5e0d7742deb18c5110
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 audio_patch_handle_t mHandle; 313 struct audio_patch mPatch; 314 uid_t mUid; 315 audio_patch_handle_t mAfPatchHandle; 316 }; 317 318 class DeviceDescriptor: public AudioPort, public AudioPortConfig 319 { 320 public: 321 DeviceDescriptor(const String8& name, audio_devices_t type); 322 323 virtual ~DeviceDescriptor() {} 324 325 bool equals(const sp<DeviceDescriptor>& other) const; 326 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 327 const struct audio_port_config *srcConfig = NULL) const; 328 329 virtual void toAudioPort(struct audio_port *port) const; 330 331 status_t dump(int fd, int spaces, int index) const; 332 333 audio_devices_t mDeviceType; 334 String8 mAddress; 335 audio_port_handle_t mId; 336 }; 337 338 class DeviceVector : public SortedVector< sp<DeviceDescriptor> > 339 { 340 public: 341 DeviceVector() : SortedVector(), mDeviceTypes(AUDIO_DEVICE_NONE) {} 342 343 ssize_t add(const sp<DeviceDescriptor>& item); 344 ssize_t remove(const sp<DeviceDescriptor>& item); 345 ssize_t indexOf(const sp<DeviceDescriptor>& item) const; 346 347 audio_devices_t types() const { return mDeviceTypes; } 348 349 void loadDevicesFromType(audio_devices_t types); 350 void loadDevicesFromName(char *name, const DeviceVector& declaredDevices); 351 352 sp<DeviceDescriptor> getDevice(audio_devices_t type, String8 address) const; 353 DeviceVector getDevicesFromType(audio_devices_t types) const; 354 sp<DeviceDescriptor> getDeviceFromId(audio_port_handle_t id) const; 355 sp<DeviceDescriptor> getDeviceFromName(const String8& name) const; 356 DeviceVector getDevicesFromTypeAddr(audio_devices_t type, String8 address) 357 const; 358 359 private: 360 void refreshTypes(); 361 audio_devices_t mDeviceTypes; 362 }; 363 364 // the IOProfile class describes the capabilities of an output or input stream. 365 // It is currently assumed that all combination of listed parameters are supported. 366 // It is used by the policy manager to determine if an output or input is suitable for 367 // a given use case, open/close it accordingly and connect/disconnect audio tracks 368 // to/from it. 369 class IOProfile : public AudioPort 370 { 371 public: 372 IOProfile(const String8& name, audio_port_role_t role, const sp<HwModule>& module); 373 virtual ~IOProfile(); 374 375 // This method is used for both output and input. 376 // If parameter updatedSamplingRate is non-NULL, it is assigned the actual sample rate. 377 // For input, flags is interpreted as audio_input_flags_t. 378 // TODO: merge audio_output_flags_t and audio_input_flags_t. 379 bool isCompatibleProfile(audio_devices_t device, 380 uint32_t samplingRate, 381 uint32_t *updatedSamplingRate, 382 audio_format_t format, 383 audio_channel_mask_t channelMask, 384 audio_output_flags_t flags) const; 385 386 void dump(int fd); 387 void log(); 388 389 DeviceVector mSupportedDevices; // supported devices 390 // (devices this output can be routed to) 391 }; 392 393 class HwModule : public RefBase 394 { 395 public: 396 HwModule(const char *name); 397 ~HwModule(); 398 399 status_t loadOutput(cnode *root); 400 status_t loadInput(cnode *root); 401 status_t loadDevice(cnode *root); 402 403 void dump(int fd); 404 405 const char *const mName; // base name of the audio HW module (primary, a2dp ...) 406 uint32_t mHalVersion; // audio HAL API version 407 audio_module_handle_t mHandle; 408 Vector < sp<IOProfile> > mOutputProfiles; // output profiles exposed by this module 409 Vector < sp<IOProfile> > mInputProfiles; // input profiles exposed by this module 410 DeviceVector mDeclaredDevices; // devices declared in audio_policy.conf 411 412 }; 413 414 // default volume curve 415 static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManager::VOLCNT]; 416 // default volume curve for media strategy 417 static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 418 // volume curve for non-media audio on ext media outputs (HDMI, Line, etc) 419 static const VolumeCurvePoint sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 420 // volume curve for media strategy on speakers 421 static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 422 static const VolumeCurvePoint sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 423 // volume curve for sonification strategy on speakers 424 static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT]; 425 static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 426 static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 427 static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 428 static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 429 static const VolumeCurvePoint sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 430 static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 431 // default volume curves per stream and device category. See initializeVolumeCurves() 432 static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][DEVICE_CATEGORY_CNT]; 433 434 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output 435 // and keep track of the usage of this output by each audio stream type. 436 class AudioOutputDescriptor: public AudioPortConfig 437 { 438 public: 439 AudioOutputDescriptor(const sp<IOProfile>& profile); 440 441 status_t dump(int fd); 442 443 audio_devices_t device() const; 444 void changeRefCount(audio_stream_type_t stream, int delta); 445 446 bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); } 447 audio_devices_t supportedDevices(); 448 uint32_t latency(); 449 bool sharesHwModuleWith(const sp<AudioOutputDescriptor> outputDesc); 450 bool isActive(uint32_t inPastMs = 0) const; 451 bool isStreamActive(audio_stream_type_t stream, 452 uint32_t inPastMs = 0, 453 nsecs_t sysTime = 0) const; 454 bool isStrategyActive(routing_strategy strategy, 455 uint32_t inPastMs = 0, 456 nsecs_t sysTime = 0) const; 457 458 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 459 const struct audio_port_config *srcConfig = NULL) const; 460 void toAudioPort(struct audio_port *port) const; 461 462 audio_port_handle_t mId; 463 audio_io_handle_t mIoHandle; // output handle 464 uint32_t mLatency; // 465 audio_output_flags_t mFlags; // 466 audio_devices_t mDevice; // current device this output is routed to 467 audio_patch_handle_t mPatchHandle; 468 uint32_t mRefCount[AUDIO_STREAM_CNT]; // number of streams of each type using this output 469 nsecs_t mStopTime[AUDIO_STREAM_CNT]; 470 sp<AudioOutputDescriptor> mOutput1; // used by duplicated outputs: first output 471 sp<AudioOutputDescriptor> mOutput2; // used by duplicated outputs: second output 472 float mCurVolume[AUDIO_STREAM_CNT]; // current stream volume 473 int mMuteCount[AUDIO_STREAM_CNT]; // mute request counter 474 const sp<IOProfile> mProfile; // I/O profile this output derives from 475 bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible 476 // device selection. See checkDeviceMuteStrategies() 477 uint32_t mDirectOpenCount; // number of clients using this output (direct outputs only) 478 }; 479 480 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 481 // and keep track of the usage of this input. 482 class AudioInputDescriptor: public AudioPortConfig 483 { 484 public: 485 AudioInputDescriptor(const sp<IOProfile>& profile); 486 487 status_t dump(int fd); 488 489 audio_port_handle_t mId; 490 audio_io_handle_t mIoHandle; // input handle 491 audio_devices_t mDevice; // current device this input is routed to 492 audio_patch_handle_t mPatchHandle; 493 uint32_t mRefCount; // number of AudioRecord clients using 494 // this input 495 uint32_t mOpenRefCount; 496 audio_source_t mInputSource; // input source selected by application 497 //(mediarecorder.h) 498 const sp<IOProfile> mProfile; // I/O profile this output derives from 499 SortedVector<audio_session_t> mSessions; // audio sessions attached to this input 500 bool mIsSoundTrigger; // used by a soundtrigger capture 501 502 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 503 const struct audio_port_config *srcConfig = NULL) const; 504 void toAudioPort(struct audio_port *port) const; 505 }; 506 507 // stream descriptor used for volume control 508 class StreamDescriptor 509 { 510 public: 511 StreamDescriptor(); 512 513 int getVolumeIndex(audio_devices_t device); 514 void dump(int fd); 515 516 int mIndexMin; // min volume index 517 int mIndexMax; // max volume index 518 KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device 519 bool mCanBeMuted; // true is the stream can be muted 520 521 const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT]; 522 }; 523 524 // stream descriptor used for volume control 525 class EffectDescriptor : public RefBase 526 { 527 public: 528 529 status_t dump(int fd); 530 531 int mIo; // io the effect is attached to 532 routing_strategy mStrategy; // routing strategy the effect is associated to 533 int mSession; // audio session the effect is on 534 effect_descriptor_t mDesc; // effect descriptor 535 bool mEnabled; // enabled state: CPU load being used or not 536 }; 537 538 void addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc); 539 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 540 541 // return the strategy corresponding to a given stream type 542 static routing_strategy getStrategy(audio_stream_type_t stream); 543 544 // return appropriate device for streams handled by the specified strategy according to current 545 // phone state, connected devices... 546 // if fromCache is true, the device is returned from mDeviceForStrategy[], 547 // otherwise it is determine by current state 548 // (device connected,phone state, force use, a2dp output...) 549 // This allows to: 550 // 1 speed up process when the state is stable (when starting or stopping an output) 551 // 2 access to either current device selection (fromCache == true) or 552 // "future" device selection (fromCache == false) when called from a context 553 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 554 // before updateDevicesAndOutputs() is called. 555 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 556 bool fromCache); 557 558 // change the route of the specified output. Returns the number of ms we have slept to 559 // allow new routing to take effect in certain cases. 560 uint32_t setOutputDevice(audio_io_handle_t output, 561 audio_devices_t device, 562 bool force = false, 563 int delayMs = 0, 564 audio_patch_handle_t *patchHandle = NULL, 565 const char* address = NULL); 566 status_t resetOutputDevice(audio_io_handle_t output, 567 int delayMs = 0, 568 audio_patch_handle_t *patchHandle = NULL); 569 status_t setInputDevice(audio_io_handle_t input, 570 audio_devices_t device, 571 bool force = false, 572 audio_patch_handle_t *patchHandle = NULL); 573 status_t resetInputDevice(audio_io_handle_t input, 574 audio_patch_handle_t *patchHandle = NULL); 575 576 // select input device corresponding to requested audio source 577 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 578 579 // return io handle of active input or 0 if no input is active 580 // Only considers inputs from physical devices (e.g. main mic, headset mic) when 581 // ignoreVirtualInputs is true. 582 audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true); 583 584 uint32_t activeInputsCount() const; 585 586 // initialize volume curves for each strategy and device category 587 void initializeVolumeCurves(); 588 589 // compute the actual volume for a given stream according to the requested index and a particular 590 // device 591 virtual float computeVolume(audio_stream_type_t stream, int index, 592 audio_io_handle_t output, audio_devices_t device); 593 594 // check that volume change is permitted, compute and send new volume to audio hardware 595 status_t checkAndSetVolume(audio_stream_type_t stream, int index, audio_io_handle_t output, 596 audio_devices_t device, int delayMs = 0, bool force = false); 597 598 // apply all stream volumes to the specified output and device 599 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 600 601 // Mute or unmute all streams handled by the specified strategy on the specified output 602 void setStrategyMute(routing_strategy strategy, 603 bool on, 604 audio_io_handle_t output, 605 int delayMs = 0, 606 audio_devices_t device = (audio_devices_t)0); 607 608 // Mute or unmute the stream on the specified output 609 void setStreamMute(audio_stream_type_t stream, 610 bool on, 611 audio_io_handle_t output, 612 int delayMs = 0, 613 audio_devices_t device = (audio_devices_t)0); 614 615 // handle special cases for sonification strategy while in call: mute streams or replace by 616 // a special tone in the device used for communication 617 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 618 619 // true if device is in a telephony or VoIP call 620 virtual bool isInCall(); 621 622 // true if given state represents a device in a telephony or VoIP call 623 virtual bool isStateInCall(int state); 624 625 // when a device is connected, checks if an open output can be routed 626 // to this device. If none is open, tries to open one of the available outputs. 627 // Returns an output suitable to this device or 0. 628 // when a device is disconnected, checks if an output is not used any more and 629 // returns its handle if any. 630 // transfers the audio tracks and effects from one output thread to another accordingly. 631 status_t checkOutputsForDevice(audio_devices_t device, 632 audio_policy_dev_state_t state, 633 SortedVector<audio_io_handle_t>& outputs, 634 const String8 address); 635 636 status_t checkInputsForDevice(audio_devices_t device, 637 audio_policy_dev_state_t state, 638 SortedVector<audio_io_handle_t>& inputs, 639 const String8 address); 640 641 // close an output and its companion duplicating output. 642 void closeOutput(audio_io_handle_t output); 643 644 // checks and if necessary changes outputs used for all strategies. 645 // must be called every time a condition that affects the output choice for a given strategy 646 // changes: connected device, phone state, force use... 647 // Must be called before updateDevicesAndOutputs() 648 void checkOutputForStrategy(routing_strategy strategy); 649 650 // Same as checkOutputForStrategy() but for a all strategies in order of priority 651 void checkOutputForAllStrategies(); 652 653 // manages A2DP output suspend/restore according to phone state and BT SCO usage 654 void checkA2dpSuspend(); 655 656 // returns the A2DP output handle if it is open or 0 otherwise 657 audio_io_handle_t getA2dpOutput(); 658 659 // selects the most appropriate device on output for current state 660 // must be called every time a condition that affects the device choice for a given output is 661 // changed: connected device, phone state, force use, output start, output stop.. 662 // see getDeviceForStrategy() for the use of fromCache parameter 663 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 664 665 // updates cache of device used by all strategies (mDeviceForStrategy[]) 666 // must be called every time a condition that affects the device choice for a given strategy is 667 // changed: connected device, phone state, force use... 668 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 669 // Must be called after checkOutputForAllStrategies() 670 void updateDevicesAndOutputs(); 671 672 // selects the most appropriate device on input for current state 673 audio_devices_t getNewInputDevice(audio_io_handle_t input); 674 675 virtual uint32_t getMaxEffectsCpuLoad(); 676 virtual uint32_t getMaxEffectsMemory(); 677#ifdef AUDIO_POLICY_TEST 678 virtual bool threadLoop(); 679 void exit(); 680 int testOutputIndex(audio_io_handle_t output); 681#endif //AUDIO_POLICY_TEST 682 683 status_t setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled); 684 685 // returns the category the device belongs to with regard to volume curve management 686 static device_category getDeviceCategory(audio_devices_t device); 687 688 // extract one device relevant for volume control from multiple device selection 689 static audio_devices_t getDeviceForVolume(audio_devices_t device); 690 691 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 692 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs); 693 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 694 SortedVector<audio_io_handle_t>& outputs2); 695 696 // mute/unmute strategies using an incompatible device combination 697 // if muting, wait for the audio in pcm buffer to be drained before proceeding 698 // if unmuting, unmute only after the specified delay 699 // Returns the number of ms waited 700 uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 701 audio_devices_t prevDevice, 702 uint32_t delayMs); 703 704 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 705 audio_output_flags_t flags); 706 // samplingRate parameter is an in/out and so may be modified 707 sp<IOProfile> getInputProfile(audio_devices_t device, 708 uint32_t& samplingRate, 709 audio_format_t format, 710 audio_channel_mask_t channelMask, 711 audio_input_flags_t flags); 712 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 713 uint32_t samplingRate, 714 audio_format_t format, 715 audio_channel_mask_t channelMask, 716 audio_output_flags_t flags); 717 718 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 719 720 bool isNonOffloadableEffectEnabled(); 721 722 status_t addAudioPatch(audio_patch_handle_t handle, 723 const sp<AudioPatch>& patch); 724 status_t removeAudioPatch(audio_patch_handle_t handle); 725 726 sp<AudioOutputDescriptor> getOutputFromId(audio_port_handle_t id) const; 727 sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const; 728 sp<HwModule> getModuleForDevice(audio_devices_t device) const; 729 sp<HwModule> getModuleFromName(const char *name) const; 730 audio_devices_t availablePrimaryOutputDevices(); 731 audio_devices_t availablePrimaryInputDevices(); 732 733 void updateCallRouting(audio_devices_t rxDevice, int delayMs = 0); 734 735 // 736 // Audio policy configuration file parsing (audio_policy.conf) 737 // 738 static uint32_t stringToEnum(const struct StringToEnum *table, 739 size_t size, 740 const char *name); 741 static const char *enumToString(const struct StringToEnum *table, 742 size_t size, 743 uint32_t value); 744 static bool stringToBool(const char *value); 745 static audio_output_flags_t parseFlagNames(char *name); 746 static audio_devices_t parseDeviceNames(char *name); 747 void loadHwModule(cnode *root); 748 void loadHwModules(cnode *root); 749 void loadGlobalConfig(cnode *root, const sp<HwModule>& module); 750 status_t loadAudioPolicyConfig(const char *path); 751 void defaultAudioPolicyConfig(void); 752 753 754 uid_t mUidCached; 755 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 756 audio_io_handle_t mPrimaryOutput; // primary output handle 757 // list of descriptors for outputs currently opened 758 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mOutputs; 759 // copy of mOutputs before setDeviceConnectionState() opens new outputs 760 // reset to mOutputs when updateDevicesAndOutputs() is called. 761 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mPreviousOutputs; 762 DefaultKeyedVector<audio_io_handle_t, sp<AudioInputDescriptor> > mInputs; // list of input descriptors 763 DeviceVector mAvailableOutputDevices; // all available output devices 764 DeviceVector mAvailableInputDevices; // all available input devices 765 int mPhoneState; // current phone state 766 audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT]; // current forced use configuration 767 768 StreamDescriptor mStreams[AUDIO_STREAM_CNT]; // stream descriptors for volume control 769 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 770 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 771 float mLastVoiceVolume; // last voice volume value sent to audio HAL 772 773 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 774 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 775 // Maximum memory allocated to audio effects in KB 776 static const uint32_t MAX_EFFECTS_MEMORY = 512; 777 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 778 uint32_t mTotalEffectsMemory; // current memory used by effects 779 KeyedVector<int, sp<EffectDescriptor> > mEffects; // list of registered audio effects 780 bool mA2dpSuspended; // true if A2DP output is suspended 781 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 782 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 783 // to boost soft sounds, used to adjust volume curves accordingly 784 785 Vector < sp<HwModule> > mHwModules; 786 volatile int32_t mNextUniqueId; 787 volatile int32_t mAudioPortGeneration; 788 789 DefaultKeyedVector<audio_patch_handle_t, sp<AudioPatch> > mAudioPatches; 790 791 DefaultKeyedVector<audio_session_t, audio_io_handle_t> mSoundTriggerSessions; 792 793 sp<AudioPatch> mCallTxPatch; 794 sp<AudioPatch> mCallRxPatch; 795 796#ifdef AUDIO_POLICY_TEST 797 Mutex mLock; 798 Condition mWaitWorkCV; 799 800 int mCurOutput; 801 bool mDirectOutput; 802 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 803 int mTestInput; 804 uint32_t mTestDevice; 805 uint32_t mTestSamplingRate; 806 uint32_t mTestFormat; 807 uint32_t mTestChannels; 808 uint32_t mTestLatencyMs; 809#endif //AUDIO_POLICY_TEST 810 811private: 812 static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, 813 int indexInUi); 814 // updates device caching and output for streams that can influence the 815 // routing of notifications 816 void handleNotificationRoutingForStream(audio_stream_type_t stream); 817 static bool isVirtualInputDevice(audio_devices_t device); 818 static bool deviceDistinguishesOnAddress(audio_devices_t device); 819 // find the outputs on a given output descriptor that have the given address. 820 // to be called on an AudioOutputDescriptor whose supported devices (as defined 821 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 822 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 823 // where addresses are used to distinguish between one connected device and another. 824 void findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/, 825 const String8 address /*in*/, 826 SortedVector<audio_io_handle_t>& outputs /*out*/); 827 uint32_t nextUniqueId(); 828 uint32_t nextAudioPortGeneration(); 829 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 830 // internal method to return the output handle for the given device and format 831 audio_io_handle_t getOutputForDevice( 832 audio_devices_t device, 833 audio_stream_type_t stream, 834 uint32_t samplingRate, 835 audio_format_t format, 836 audio_channel_mask_t channelMask, 837 audio_output_flags_t flags, 838 const audio_offload_info_t *offloadInfo); 839 // internal function to derive a stream type value from audio attributes 840 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 841}; 842 843}; 844