AudioPolicyManager.h revision 223fd5c9738e9665e495904d37d4632414b68c1e
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 STRATEGY_TRANSMITTED_THROUGH_SPEAKER, 191 STRATEGY_ACCESSIBILITY, 192 STRATEGY_REROUTING, 193 NUM_STRATEGIES 194 }; 195 196 // 4 points to define the volume attenuation curve, each characterized by the volume 197 // index (from 0 to 100) at which they apply, and the attenuation in dB at that index. 198 // we use 100 steps to avoid rounding errors when computing the volume in volIndexToAmpl() 199 200 enum { VOLMIN = 0, VOLKNEE1 = 1, VOLKNEE2 = 2, VOLMAX = 3, VOLCNT = 4}; 201 202 class VolumeCurvePoint 203 { 204 public: 205 int mIndex; 206 float mDBAttenuation; 207 }; 208 209 // device categories used for volume curve management. 210 enum device_category { 211 DEVICE_CATEGORY_HEADSET, 212 DEVICE_CATEGORY_SPEAKER, 213 DEVICE_CATEGORY_EARPIECE, 214 DEVICE_CATEGORY_EXT_MEDIA, 215 DEVICE_CATEGORY_CNT 216 }; 217 218 class HwModule; 219 220 class AudioGain: public RefBase 221 { 222 public: 223 AudioGain(int index, bool useInChannelMask); 224 virtual ~AudioGain() {} 225 226 void dump(int fd, int spaces, int index) const; 227 228 void getDefaultConfig(struct audio_gain_config *config); 229 status_t checkConfig(const struct audio_gain_config *config); 230 int mIndex; 231 struct audio_gain mGain; 232 bool mUseInChannelMask; 233 }; 234 235 class AudioPort: public virtual RefBase 236 { 237 public: 238 AudioPort(const String8& name, audio_port_type_t type, 239 audio_port_role_t role, const sp<HwModule>& module); 240 virtual ~AudioPort() {} 241 242 virtual void toAudioPort(struct audio_port *port) const; 243 244 void importAudioPort(const sp<AudioPort> port); 245 void clearCapabilities(); 246 247 void loadSamplingRates(char *name); 248 void loadFormats(char *name); 249 void loadOutChannels(char *name); 250 void loadInChannels(char *name); 251 252 audio_gain_mode_t loadGainMode(char *name); 253 void loadGain(cnode *root, int index); 254 void loadGains(cnode *root); 255 256 // searches for an exact match 257 status_t checkExactSamplingRate(uint32_t samplingRate) const; 258 // searches for a compatible match, and returns the best match via updatedSamplingRate 259 status_t checkCompatibleSamplingRate(uint32_t samplingRate, 260 uint32_t *updatedSamplingRate) const; 261 // searches for an exact match 262 status_t checkExactChannelMask(audio_channel_mask_t channelMask) const; 263 // searches for a compatible match, currently implemented for input channel masks only 264 status_t checkCompatibleChannelMask(audio_channel_mask_t channelMask) const; 265 status_t checkFormat(audio_format_t format) const; 266 status_t checkGain(const struct audio_gain_config *gainConfig, int index) const; 267 268 uint32_t pickSamplingRate() const; 269 audio_channel_mask_t pickChannelMask() const; 270 audio_format_t pickFormat() const; 271 272 static const audio_format_t sPcmFormatCompareTable[]; 273 static int compareFormats(audio_format_t format1, audio_format_t format2); 274 275 void dump(int fd, int spaces) const; 276 277 String8 mName; 278 audio_port_type_t mType; 279 audio_port_role_t mRole; 280 bool mUseInChannelMask; 281 // by convention, "0' in the first entry in mSamplingRates, mChannelMasks or mFormats 282 // indicates the supported parameters should be read from the output stream 283 // after it is opened for the first time 284 Vector <uint32_t> mSamplingRates; // supported sampling rates 285 Vector <audio_channel_mask_t> mChannelMasks; // supported channel masks 286 Vector <audio_format_t> mFormats; // supported audio formats 287 Vector < sp<AudioGain> > mGains; // gain controllers 288 sp<HwModule> mModule; // audio HW module exposing this I/O stream 289 uint32_t mFlags; // attribute flags (e.g primary output, 290 // direct output...). 291 }; 292 293 class AudioPortConfig: public virtual RefBase 294 { 295 public: 296 AudioPortConfig(); 297 virtual ~AudioPortConfig() {} 298 299 status_t applyAudioPortConfig(const struct audio_port_config *config, 300 struct audio_port_config *backupConfig = NULL); 301 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 302 const struct audio_port_config *srcConfig = NULL) const = 0; 303 virtual sp<AudioPort> getAudioPort() const = 0; 304 uint32_t mSamplingRate; 305 audio_format_t mFormat; 306 audio_channel_mask_t mChannelMask; 307 struct audio_gain_config mGain; 308 }; 309 310 311 class AudioPatch: public RefBase 312 { 313 public: 314 AudioPatch(audio_patch_handle_t handle, 315 const struct audio_patch *patch, uid_t uid) : 316 mHandle(handle), mPatch(*patch), mUid(uid), mAfPatchHandle(0) {} 317 318 status_t dump(int fd, int spaces, int index) const; 319 320 audio_patch_handle_t mHandle; 321 struct audio_patch mPatch; 322 uid_t mUid; 323 audio_patch_handle_t mAfPatchHandle; 324 }; 325 326 class DeviceDescriptor: public AudioPort, public AudioPortConfig 327 { 328 public: 329 DeviceDescriptor(const String8& name, audio_devices_t type); 330 331 virtual ~DeviceDescriptor() {} 332 333 bool equals(const sp<DeviceDescriptor>& other) const; 334 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 335 const struct audio_port_config *srcConfig = NULL) const; 336 virtual sp<AudioPort> getAudioPort() const { return (AudioPort*) this; } 337 338 virtual void toAudioPort(struct audio_port *port) const; 339 340 status_t dump(int fd, int spaces, int index) const; 341 342 audio_devices_t mDeviceType; 343 String8 mAddress; 344 audio_port_handle_t mId; 345 }; 346 347 class DeviceVector : public SortedVector< sp<DeviceDescriptor> > 348 { 349 public: 350 DeviceVector() : SortedVector(), mDeviceTypes(AUDIO_DEVICE_NONE) {} 351 352 ssize_t add(const sp<DeviceDescriptor>& item); 353 ssize_t remove(const sp<DeviceDescriptor>& item); 354 ssize_t indexOf(const sp<DeviceDescriptor>& item) const; 355 356 audio_devices_t types() const { return mDeviceTypes; } 357 358 void loadDevicesFromType(audio_devices_t types); 359 void loadDevicesFromName(char *name, const DeviceVector& declaredDevices); 360 361 sp<DeviceDescriptor> getDevice(audio_devices_t type, String8 address) const; 362 DeviceVector getDevicesFromType(audio_devices_t types) const; 363 sp<DeviceDescriptor> getDeviceFromId(audio_port_handle_t id) const; 364 sp<DeviceDescriptor> getDeviceFromName(const String8& name) const; 365 DeviceVector getDevicesFromTypeAddr(audio_devices_t type, String8 address) 366 const; 367 368 private: 369 void refreshTypes(); 370 audio_devices_t mDeviceTypes; 371 }; 372 373 // the IOProfile class describes the capabilities of an output or input stream. 374 // It is currently assumed that all combination of listed parameters are supported. 375 // It is used by the policy manager to determine if an output or input is suitable for 376 // a given use case, open/close it accordingly and connect/disconnect audio tracks 377 // to/from it. 378 class IOProfile : public AudioPort 379 { 380 public: 381 IOProfile(const String8& name, audio_port_role_t role, const sp<HwModule>& module); 382 virtual ~IOProfile(); 383 384 // This method is used for both output and input. 385 // If parameter updatedSamplingRate is non-NULL, it is assigned the actual sample rate. 386 // For input, flags is interpreted as audio_input_flags_t. 387 // TODO: merge audio_output_flags_t and audio_input_flags_t. 388 bool isCompatibleProfile(audio_devices_t device, 389 uint32_t samplingRate, 390 uint32_t *updatedSamplingRate, 391 audio_format_t format, 392 audio_channel_mask_t channelMask, 393 uint32_t flags) const; 394 395 void dump(int fd); 396 void log(); 397 398 DeviceVector mSupportedDevices; // supported devices 399 // (devices this output can be routed to) 400 }; 401 402 class HwModule : public RefBase 403 { 404 public: 405 HwModule(const char *name); 406 ~HwModule(); 407 408 status_t loadOutput(cnode *root); 409 status_t loadInput(cnode *root); 410 status_t loadDevice(cnode *root); 411 412 void dump(int fd); 413 414 const char *const mName; // base name of the audio HW module (primary, a2dp ...) 415 uint32_t mHalVersion; // audio HAL API version 416 audio_module_handle_t mHandle; 417 Vector < sp<IOProfile> > mOutputProfiles; // output profiles exposed by this module 418 Vector < sp<IOProfile> > mInputProfiles; // input profiles exposed by this module 419 DeviceVector mDeclaredDevices; // devices declared in audio_policy.conf 420 421 }; 422 423 // default volume curve 424 static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManager::VOLCNT]; 425 // default volume curve for media strategy 426 static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 427 // volume curve for non-media audio on ext media outputs (HDMI, Line, etc) 428 static const VolumeCurvePoint sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 429 // volume curve for media strategy on speakers 430 static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 431 static const VolumeCurvePoint sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 432 // volume curve for sonification strategy on speakers 433 static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT]; 434 static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 435 static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 436 static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 437 static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 438 static const VolumeCurvePoint sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 439 static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 440 static const VolumeCurvePoint sLinearVolumeCurve[AudioPolicyManager::VOLCNT]; 441 static const VolumeCurvePoint sSilentVolumeCurve[AudioPolicyManager::VOLCNT]; 442 static const VolumeCurvePoint sFullScaleVolumeCurve[AudioPolicyManager::VOLCNT]; 443 // default volume curves per stream and device category. See initializeVolumeCurves() 444 static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][DEVICE_CATEGORY_CNT]; 445 446 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output 447 // and keep track of the usage of this output by each audio stream type. 448 class AudioOutputDescriptor: public AudioPortConfig 449 { 450 public: 451 AudioOutputDescriptor(const sp<IOProfile>& profile); 452 453 status_t dump(int fd); 454 455 audio_devices_t device() const; 456 void changeRefCount(audio_stream_type_t stream, int delta); 457 458 bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); } 459 audio_devices_t supportedDevices(); 460 uint32_t latency(); 461 bool sharesHwModuleWith(const sp<AudioOutputDescriptor> outputDesc); 462 bool isActive(uint32_t inPastMs = 0) const; 463 bool isStreamActive(audio_stream_type_t stream, 464 uint32_t inPastMs = 0, 465 nsecs_t sysTime = 0) const; 466 bool isStrategyActive(routing_strategy strategy, 467 uint32_t inPastMs = 0, 468 nsecs_t sysTime = 0) const; 469 470 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 471 const struct audio_port_config *srcConfig = NULL) const; 472 virtual sp<AudioPort> getAudioPort() const { return mProfile; } 473 void toAudioPort(struct audio_port *port) const; 474 475 audio_port_handle_t mId; 476 audio_io_handle_t mIoHandle; // output handle 477 uint32_t mLatency; // 478 audio_output_flags_t mFlags; // 479 audio_devices_t mDevice; // current device this output is routed to 480 audio_patch_handle_t mPatchHandle; 481 uint32_t mRefCount[AUDIO_STREAM_CNT]; // number of streams of each type using this output 482 nsecs_t mStopTime[AUDIO_STREAM_CNT]; 483 sp<AudioOutputDescriptor> mOutput1; // used by duplicated outputs: first output 484 sp<AudioOutputDescriptor> mOutput2; // used by duplicated outputs: second output 485 float mCurVolume[AUDIO_STREAM_CNT]; // current stream volume 486 int mMuteCount[AUDIO_STREAM_CNT]; // mute request counter 487 const sp<IOProfile> mProfile; // I/O profile this output derives from 488 bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible 489 // device selection. See checkDeviceMuteStrategies() 490 uint32_t mDirectOpenCount; // number of clients using this output (direct outputs only) 491 }; 492 493 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 494 // and keep track of the usage of this input. 495 class AudioInputDescriptor: public AudioPortConfig 496 { 497 public: 498 AudioInputDescriptor(const sp<IOProfile>& profile); 499 500 status_t dump(int fd); 501 502 audio_port_handle_t mId; 503 audio_io_handle_t mIoHandle; // input handle 504 audio_devices_t mDevice; // current device this input is routed to 505 audio_patch_handle_t mPatchHandle; 506 uint32_t mRefCount; // number of AudioRecord clients using 507 // this input 508 uint32_t mOpenRefCount; 509 audio_source_t mInputSource; // input source selected by application 510 //(mediarecorder.h) 511 const sp<IOProfile> mProfile; // I/O profile this output derives from 512 SortedVector<audio_session_t> mSessions; // audio sessions attached to this input 513 bool mIsSoundTrigger; // used by a soundtrigger capture 514 515 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 516 const struct audio_port_config *srcConfig = NULL) const; 517 virtual sp<AudioPort> getAudioPort() const { return mProfile; } 518 void toAudioPort(struct audio_port *port) const; 519 }; 520 521 // stream descriptor used for volume control 522 class StreamDescriptor 523 { 524 public: 525 StreamDescriptor(); 526 527 int getVolumeIndex(audio_devices_t device); 528 void dump(int fd); 529 530 int mIndexMin; // min volume index 531 int mIndexMax; // max volume index 532 KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device 533 bool mCanBeMuted; // true is the stream can be muted 534 535 const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT]; 536 }; 537 538 // stream descriptor used for volume control 539 class EffectDescriptor : public RefBase 540 { 541 public: 542 543 status_t dump(int fd); 544 545 int mIo; // io the effect is attached to 546 routing_strategy mStrategy; // routing strategy the effect is associated to 547 int mSession; // audio session the effect is on 548 effect_descriptor_t mDesc; // effect descriptor 549 bool mEnabled; // enabled state: CPU load being used or not 550 }; 551 552 void addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc); 553 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 554 555 // return the strategy corresponding to a given stream type 556 static routing_strategy getStrategy(audio_stream_type_t stream); 557 558 // return appropriate device for streams handled by the specified strategy according to current 559 // phone state, connected devices... 560 // if fromCache is true, the device is returned from mDeviceForStrategy[], 561 // otherwise it is determine by current state 562 // (device connected,phone state, force use, a2dp output...) 563 // This allows to: 564 // 1 speed up process when the state is stable (when starting or stopping an output) 565 // 2 access to either current device selection (fromCache == true) or 566 // "future" device selection (fromCache == false) when called from a context 567 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 568 // before updateDevicesAndOutputs() is called. 569 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 570 bool fromCache); 571 572 // change the route of the specified output. Returns the number of ms we have slept to 573 // allow new routing to take effect in certain cases. 574 uint32_t setOutputDevice(audio_io_handle_t output, 575 audio_devices_t device, 576 bool force = false, 577 int delayMs = 0, 578 audio_patch_handle_t *patchHandle = NULL, 579 const char* address = NULL); 580 status_t resetOutputDevice(audio_io_handle_t output, 581 int delayMs = 0, 582 audio_patch_handle_t *patchHandle = NULL); 583 status_t setInputDevice(audio_io_handle_t input, 584 audio_devices_t device, 585 bool force = false, 586 audio_patch_handle_t *patchHandle = NULL); 587 status_t resetInputDevice(audio_io_handle_t input, 588 audio_patch_handle_t *patchHandle = NULL); 589 590 // select input device corresponding to requested audio source 591 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 592 593 // return io handle of active input or 0 if no input is active 594 // Only considers inputs from physical devices (e.g. main mic, headset mic) when 595 // ignoreVirtualInputs is true. 596 audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true); 597 598 uint32_t activeInputsCount() const; 599 600 // initialize volume curves for each strategy and device category 601 void initializeVolumeCurves(); 602 603 // compute the actual volume for a given stream according to the requested index and a particular 604 // device 605 virtual float computeVolume(audio_stream_type_t stream, int index, 606 audio_io_handle_t output, audio_devices_t device); 607 608 // check that volume change is permitted, compute and send new volume to audio hardware 609 virtual status_t checkAndSetVolume(audio_stream_type_t stream, int index, 610 audio_io_handle_t output, 611 audio_devices_t device, 612 int delayMs = 0, bool force = false); 613 614 // apply all stream volumes to the specified output and device 615 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 616 617 // Mute or unmute all streams handled by the specified strategy on the specified output 618 void setStrategyMute(routing_strategy strategy, 619 bool on, 620 audio_io_handle_t output, 621 int delayMs = 0, 622 audio_devices_t device = (audio_devices_t)0); 623 624 // Mute or unmute the stream on the specified output 625 void setStreamMute(audio_stream_type_t stream, 626 bool on, 627 audio_io_handle_t output, 628 int delayMs = 0, 629 audio_devices_t device = (audio_devices_t)0); 630 631 // handle special cases for sonification strategy while in call: mute streams or replace by 632 // a special tone in the device used for communication 633 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 634 635 // true if device is in a telephony or VoIP call 636 virtual bool isInCall(); 637 638 // true if given state represents a device in a telephony or VoIP call 639 virtual bool isStateInCall(int state); 640 641 // when a device is connected, checks if an open output can be routed 642 // to this device. If none is open, tries to open one of the available outputs. 643 // Returns an output suitable to this device or 0. 644 // when a device is disconnected, checks if an output is not used any more and 645 // returns its handle if any. 646 // transfers the audio tracks and effects from one output thread to another accordingly. 647 status_t checkOutputsForDevice(const sp<DeviceDescriptor> devDesc, 648 audio_policy_dev_state_t state, 649 SortedVector<audio_io_handle_t>& outputs, 650 const String8 address); 651 652 status_t checkInputsForDevice(audio_devices_t device, 653 audio_policy_dev_state_t state, 654 SortedVector<audio_io_handle_t>& inputs, 655 const String8 address); 656 657 // close an output and its companion duplicating output. 658 void closeOutput(audio_io_handle_t output); 659 660 // close an input. 661 void closeInput(audio_io_handle_t input); 662 663 // checks and if necessary changes outputs used for all strategies. 664 // must be called every time a condition that affects the output choice for a given strategy 665 // changes: connected device, phone state, force use... 666 // Must be called before updateDevicesAndOutputs() 667 void checkOutputForStrategy(routing_strategy strategy); 668 669 // Same as checkOutputForStrategy() but for a all strategies in order of priority 670 void checkOutputForAllStrategies(); 671 672 // manages A2DP output suspend/restore according to phone state and BT SCO usage 673 void checkA2dpSuspend(); 674 675 // returns the A2DP output handle if it is open or 0 otherwise 676 audio_io_handle_t getA2dpOutput(); 677 678 // selects the most appropriate device on output for current state 679 // must be called every time a condition that affects the device choice for a given output is 680 // changed: connected device, phone state, force use, output start, output stop.. 681 // see getDeviceForStrategy() for the use of fromCache parameter 682 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 683 684 // updates cache of device used by all strategies (mDeviceForStrategy[]) 685 // must be called every time a condition that affects the device choice for a given strategy is 686 // changed: connected device, phone state, force use... 687 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 688 // Must be called after checkOutputForAllStrategies() 689 void updateDevicesAndOutputs(); 690 691 // selects the most appropriate device on input for current state 692 audio_devices_t getNewInputDevice(audio_io_handle_t input); 693 694 virtual uint32_t getMaxEffectsCpuLoad(); 695 virtual uint32_t getMaxEffectsMemory(); 696#ifdef AUDIO_POLICY_TEST 697 virtual bool threadLoop(); 698 void exit(); 699 int testOutputIndex(audio_io_handle_t output); 700#endif //AUDIO_POLICY_TEST 701 702 status_t setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled); 703 704 // returns the category the device belongs to with regard to volume curve management 705 static device_category getDeviceCategory(audio_devices_t device); 706 707 // extract one device relevant for volume control from multiple device selection 708 static audio_devices_t getDeviceForVolume(audio_devices_t device); 709 710 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 711 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs); 712 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 713 SortedVector<audio_io_handle_t>& outputs2); 714 715 // mute/unmute strategies using an incompatible device combination 716 // if muting, wait for the audio in pcm buffer to be drained before proceeding 717 // if unmuting, unmute only after the specified delay 718 // Returns the number of ms waited 719 uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 720 audio_devices_t prevDevice, 721 uint32_t delayMs); 722 723 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 724 audio_output_flags_t flags, 725 audio_format_t format); 726 // samplingRate parameter is an in/out and so may be modified 727 sp<IOProfile> getInputProfile(audio_devices_t device, 728 uint32_t& samplingRate, 729 audio_format_t format, 730 audio_channel_mask_t channelMask, 731 audio_input_flags_t flags); 732 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 733 uint32_t samplingRate, 734 audio_format_t format, 735 audio_channel_mask_t channelMask, 736 audio_output_flags_t flags); 737 738 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 739 740 bool isNonOffloadableEffectEnabled(); 741 742 status_t addAudioPatch(audio_patch_handle_t handle, 743 const sp<AudioPatch>& patch); 744 status_t removeAudioPatch(audio_patch_handle_t handle); 745 746 sp<AudioOutputDescriptor> getOutputFromId(audio_port_handle_t id) const; 747 sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const; 748 sp<HwModule> getModuleForDevice(audio_devices_t device) const; 749 sp<HwModule> getModuleFromName(const char *name) const; 750 audio_devices_t availablePrimaryOutputDevices(); 751 audio_devices_t availablePrimaryInputDevices(); 752 753 void updateCallRouting(audio_devices_t rxDevice, int delayMs = 0); 754 755 // 756 // Audio policy configuration file parsing (audio_policy.conf) 757 // 758 static uint32_t stringToEnum(const struct StringToEnum *table, 759 size_t size, 760 const char *name); 761 static const char *enumToString(const struct StringToEnum *table, 762 size_t size, 763 uint32_t value); 764 static bool stringToBool(const char *value); 765 static uint32_t parseOutputFlagNames(char *name); 766 static uint32_t parseInputFlagNames(char *name); 767 static audio_devices_t parseDeviceNames(char *name); 768 void loadHwModule(cnode *root); 769 void loadHwModules(cnode *root); 770 void loadGlobalConfig(cnode *root, const sp<HwModule>& module); 771 status_t loadAudioPolicyConfig(const char *path); 772 void defaultAudioPolicyConfig(void); 773 774 775 uid_t mUidCached; 776 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 777 audio_io_handle_t mPrimaryOutput; // primary output handle 778 // list of descriptors for outputs currently opened 779 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mOutputs; 780 // copy of mOutputs before setDeviceConnectionState() opens new outputs 781 // reset to mOutputs when updateDevicesAndOutputs() is called. 782 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mPreviousOutputs; 783 DefaultKeyedVector<audio_io_handle_t, sp<AudioInputDescriptor> > mInputs; // list of input descriptors 784 DeviceVector mAvailableOutputDevices; // all available output devices 785 DeviceVector mAvailableInputDevices; // all available input devices 786 int mPhoneState; // current phone state 787 audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT]; // current forced use configuration 788 789 StreamDescriptor mStreams[AUDIO_STREAM_CNT]; // stream descriptors for volume control 790 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 791 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 792 float mLastVoiceVolume; // last voice volume value sent to audio HAL 793 794 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 795 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 796 // Maximum memory allocated to audio effects in KB 797 static const uint32_t MAX_EFFECTS_MEMORY = 512; 798 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 799 uint32_t mTotalEffectsMemory; // current memory used by effects 800 KeyedVector<int, sp<EffectDescriptor> > mEffects; // list of registered audio effects 801 bool mA2dpSuspended; // true if A2DP output is suspended 802 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 803 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 804 // to boost soft sounds, used to adjust volume curves accordingly 805 806 Vector < sp<HwModule> > mHwModules; 807 volatile int32_t mNextUniqueId; 808 volatile int32_t mAudioPortGeneration; 809 810 DefaultKeyedVector<audio_patch_handle_t, sp<AudioPatch> > mAudioPatches; 811 812 DefaultKeyedVector<audio_session_t, audio_io_handle_t> mSoundTriggerSessions; 813 814 sp<AudioPatch> mCallTxPatch; 815 sp<AudioPatch> mCallRxPatch; 816 817 // for supporting "beacon" streams, i.e. streams that only play on speaker, and never 818 // when something other than STREAM_TTS (a.k.a. "Transmitted Through Speaker") is playing 819 enum { 820 STARTING_OUTPUT, 821 STARTING_BEACON, 822 STOPPING_OUTPUT, 823 STOPPING_BEACON 824 }; 825 uint32_t mBeaconMuteRefCount; // ref count for stream that would mute beacon 826 uint32_t mBeaconPlayingRefCount;// ref count for the playing beacon streams 827 bool mBeaconMuted; // has STREAM_TTS been muted 828 829#ifdef AUDIO_POLICY_TEST 830 Mutex mLock; 831 Condition mWaitWorkCV; 832 833 int mCurOutput; 834 bool mDirectOutput; 835 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 836 int mTestInput; 837 uint32_t mTestDevice; 838 uint32_t mTestSamplingRate; 839 uint32_t mTestFormat; 840 uint32_t mTestChannels; 841 uint32_t mTestLatencyMs; 842#endif //AUDIO_POLICY_TEST 843 static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, 844 int indexInUi); 845private: 846 // updates device caching and output for streams that can influence the 847 // routing of notifications 848 void handleNotificationRoutingForStream(audio_stream_type_t stream); 849 static bool isVirtualInputDevice(audio_devices_t device); 850 static bool deviceDistinguishesOnAddress(audio_devices_t device); 851 // find the outputs on a given output descriptor that have the given address. 852 // to be called on an AudioOutputDescriptor whose supported devices (as defined 853 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 854 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 855 // where addresses are used to distinguish between one connected device and another. 856 void findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/, 857 const String8 address /*in*/, 858 SortedVector<audio_io_handle_t>& outputs /*out*/); 859 uint32_t nextUniqueId(); 860 uint32_t nextAudioPortGeneration(); 861 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 862 // internal method to return the output handle for the given device and format 863 audio_io_handle_t getOutputForDevice( 864 audio_devices_t device, 865 audio_stream_type_t stream, 866 uint32_t samplingRate, 867 audio_format_t format, 868 audio_channel_mask_t channelMask, 869 audio_output_flags_t flags, 870 const audio_offload_info_t *offloadInfo); 871 // internal function to derive a stream type value from audio attributes 872 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 873 // return true if any output is playing anything besides the stream to ignore 874 bool isAnyOutputActive(audio_stream_type_t streamToIgnore); 875 // event is one of STARTING_OUTPUT, STARTING_BEACON, STOPPING_OUTPUT, STOPPING_BEACON 876 // returns 0 if no mute/unmute event happened, the largest latency of the device where 877 // the mute/unmute happened 878 uint32_t handleEventForBeacon(int event); 879 uint32_t setBeaconMute(bool mute); 880}; 881 882}; 883