AudioPolicyManager.h revision 47bf8d8f0242bbe9cfa777c96e41e5fcd5294ee4
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 importAudioPort(const sp<AudioPort> port); 242 void clearCapabilities(); 243 244 void loadSamplingRates(char *name); 245 void loadFormats(char *name); 246 void loadOutChannels(char *name); 247 void loadInChannels(char *name); 248 249 audio_gain_mode_t loadGainMode(char *name); 250 void loadGain(cnode *root, int index); 251 void loadGains(cnode *root); 252 253 // searches for an exact match 254 status_t checkExactSamplingRate(uint32_t samplingRate) const; 255 // searches for a compatible match, and returns the best match via updatedSamplingRate 256 status_t checkCompatibleSamplingRate(uint32_t samplingRate, 257 uint32_t *updatedSamplingRate) const; 258 // searches for an exact match 259 status_t checkExactChannelMask(audio_channel_mask_t channelMask) const; 260 // searches for a compatible match, currently implemented for input channel masks only 261 status_t checkCompatibleChannelMask(audio_channel_mask_t channelMask) const; 262 status_t checkFormat(audio_format_t format) const; 263 status_t checkGain(const struct audio_gain_config *gainConfig, int index) const; 264 265 uint32_t pickSamplingRate() const; 266 audio_channel_mask_t pickChannelMask() const; 267 audio_format_t pickFormat() const; 268 269 static const audio_format_t sPcmFormatCompareTable[]; 270 static int compareFormats(audio_format_t format1, audio_format_t format2); 271 272 void dump(int fd, int spaces) const; 273 274 String8 mName; 275 audio_port_type_t mType; 276 audio_port_role_t mRole; 277 bool mUseInChannelMask; 278 // by convention, "0' in the first entry in mSamplingRates, mChannelMasks or mFormats 279 // indicates the supported parameters should be read from the output stream 280 // after it is opened for the first time 281 Vector <uint32_t> mSamplingRates; // supported sampling rates 282 Vector <audio_channel_mask_t> mChannelMasks; // supported channel masks 283 Vector <audio_format_t> mFormats; // supported audio formats 284 Vector < sp<AudioGain> > mGains; // gain controllers 285 sp<HwModule> mModule; // audio HW module exposing this I/O stream 286 audio_output_flags_t mFlags; // attribute flags (e.g primary output, 287 // direct output...). For outputs only. 288 }; 289 290 class AudioPortConfig: public virtual RefBase 291 { 292 public: 293 AudioPortConfig(); 294 virtual ~AudioPortConfig() {} 295 296 status_t applyAudioPortConfig(const struct audio_port_config *config, 297 struct audio_port_config *backupConfig = NULL); 298 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 299 const struct audio_port_config *srcConfig = NULL) const = 0; 300 sp<AudioPort> mAudioPort; 301 uint32_t mSamplingRate; 302 audio_format_t mFormat; 303 audio_channel_mask_t mChannelMask; 304 struct audio_gain_config mGain; 305 }; 306 307 308 class AudioPatch: public RefBase 309 { 310 public: 311 AudioPatch(audio_patch_handle_t handle, 312 const struct audio_patch *patch, uid_t uid) : 313 mHandle(handle), mPatch(*patch), mUid(uid), mAfPatchHandle(0) {} 314 315 status_t dump(int fd, int spaces, int index) const; 316 317 audio_patch_handle_t mHandle; 318 struct audio_patch mPatch; 319 uid_t mUid; 320 audio_patch_handle_t mAfPatchHandle; 321 }; 322 323 class DeviceDescriptor: public AudioPort, public AudioPortConfig 324 { 325 public: 326 DeviceDescriptor(const String8& name, audio_devices_t type); 327 328 virtual ~DeviceDescriptor() {} 329 330 bool equals(const sp<DeviceDescriptor>& other) const; 331 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 332 const struct audio_port_config *srcConfig = NULL) const; 333 334 virtual void toAudioPort(struct audio_port *port) const; 335 336 status_t dump(int fd, int spaces, int index) const; 337 338 audio_devices_t mDeviceType; 339 String8 mAddress; 340 audio_port_handle_t mId; 341 }; 342 343 class DeviceVector : public SortedVector< sp<DeviceDescriptor> > 344 { 345 public: 346 DeviceVector() : SortedVector(), mDeviceTypes(AUDIO_DEVICE_NONE) {} 347 348 ssize_t add(const sp<DeviceDescriptor>& item); 349 ssize_t remove(const sp<DeviceDescriptor>& item); 350 ssize_t indexOf(const sp<DeviceDescriptor>& item) const; 351 352 audio_devices_t types() const { return mDeviceTypes; } 353 354 void loadDevicesFromType(audio_devices_t types); 355 void loadDevicesFromName(char *name, const DeviceVector& declaredDevices); 356 357 sp<DeviceDescriptor> getDevice(audio_devices_t type, String8 address) const; 358 DeviceVector getDevicesFromType(audio_devices_t types) const; 359 sp<DeviceDescriptor> getDeviceFromId(audio_port_handle_t id) const; 360 sp<DeviceDescriptor> getDeviceFromName(const String8& name) const; 361 DeviceVector getDevicesFromTypeAddr(audio_devices_t type, String8 address) 362 const; 363 364 private: 365 void refreshTypes(); 366 audio_devices_t mDeviceTypes; 367 }; 368 369 // the IOProfile class describes the capabilities of an output or input stream. 370 // It is currently assumed that all combination of listed parameters are supported. 371 // It is used by the policy manager to determine if an output or input is suitable for 372 // a given use case, open/close it accordingly and connect/disconnect audio tracks 373 // to/from it. 374 class IOProfile : public AudioPort 375 { 376 public: 377 IOProfile(const String8& name, audio_port_role_t role, const sp<HwModule>& module); 378 virtual ~IOProfile(); 379 380 // This method is used for both output and input. 381 // If parameter updatedSamplingRate is non-NULL, it is assigned the actual sample rate. 382 // For input, flags is interpreted as audio_input_flags_t. 383 // TODO: merge audio_output_flags_t and audio_input_flags_t. 384 bool isCompatibleProfile(audio_devices_t device, 385 uint32_t samplingRate, 386 uint32_t *updatedSamplingRate, 387 audio_format_t format, 388 audio_channel_mask_t channelMask, 389 audio_output_flags_t flags) const; 390 391 void dump(int fd); 392 void log(); 393 394 DeviceVector mSupportedDevices; // supported devices 395 // (devices this output can be routed to) 396 }; 397 398 class HwModule : public RefBase 399 { 400 public: 401 HwModule(const char *name); 402 ~HwModule(); 403 404 status_t loadOutput(cnode *root); 405 status_t loadInput(cnode *root); 406 status_t loadDevice(cnode *root); 407 408 void dump(int fd); 409 410 const char *const mName; // base name of the audio HW module (primary, a2dp ...) 411 uint32_t mHalVersion; // audio HAL API version 412 audio_module_handle_t mHandle; 413 Vector < sp<IOProfile> > mOutputProfiles; // output profiles exposed by this module 414 Vector < sp<IOProfile> > mInputProfiles; // input profiles exposed by this module 415 DeviceVector mDeclaredDevices; // devices declared in audio_policy.conf 416 417 }; 418 419 // default volume curve 420 static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManager::VOLCNT]; 421 // default volume curve for media strategy 422 static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 423 // volume curve for non-media audio on ext media outputs (HDMI, Line, etc) 424 static const VolumeCurvePoint sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 425 // volume curve for media strategy on speakers 426 static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 427 static const VolumeCurvePoint sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 428 // volume curve for sonification strategy on speakers 429 static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT]; 430 static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 431 static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 432 static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 433 static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 434 static const VolumeCurvePoint sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 435 static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 436 // default volume curves per stream and device category. See initializeVolumeCurves() 437 static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][DEVICE_CATEGORY_CNT]; 438 439 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output 440 // and keep track of the usage of this output by each audio stream type. 441 class AudioOutputDescriptor: public AudioPortConfig 442 { 443 public: 444 AudioOutputDescriptor(const sp<IOProfile>& profile); 445 446 status_t dump(int fd); 447 448 audio_devices_t device() const; 449 void changeRefCount(audio_stream_type_t stream, int delta); 450 451 bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); } 452 audio_devices_t supportedDevices(); 453 uint32_t latency(); 454 bool sharesHwModuleWith(const sp<AudioOutputDescriptor> outputDesc); 455 bool isActive(uint32_t inPastMs = 0) const; 456 bool isStreamActive(audio_stream_type_t stream, 457 uint32_t inPastMs = 0, 458 nsecs_t sysTime = 0) const; 459 bool isStrategyActive(routing_strategy strategy, 460 uint32_t inPastMs = 0, 461 nsecs_t sysTime = 0) const; 462 463 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 464 const struct audio_port_config *srcConfig = NULL) const; 465 void toAudioPort(struct audio_port *port) const; 466 467 audio_port_handle_t mId; 468 audio_io_handle_t mIoHandle; // output handle 469 uint32_t mLatency; // 470 audio_output_flags_t mFlags; // 471 audio_devices_t mDevice; // current device this output is routed to 472 audio_patch_handle_t mPatchHandle; 473 uint32_t mRefCount[AUDIO_STREAM_CNT]; // number of streams of each type using this output 474 nsecs_t mStopTime[AUDIO_STREAM_CNT]; 475 sp<AudioOutputDescriptor> mOutput1; // used by duplicated outputs: first output 476 sp<AudioOutputDescriptor> mOutput2; // used by duplicated outputs: second output 477 float mCurVolume[AUDIO_STREAM_CNT]; // current stream volume 478 int mMuteCount[AUDIO_STREAM_CNT]; // mute request counter 479 const sp<IOProfile> mProfile; // I/O profile this output derives from 480 bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible 481 // device selection. See checkDeviceMuteStrategies() 482 uint32_t mDirectOpenCount; // number of clients using this output (direct outputs only) 483 }; 484 485 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 486 // and keep track of the usage of this input. 487 class AudioInputDescriptor: public AudioPortConfig 488 { 489 public: 490 AudioInputDescriptor(const sp<IOProfile>& profile); 491 492 status_t dump(int fd); 493 494 audio_port_handle_t mId; 495 audio_io_handle_t mIoHandle; // input handle 496 audio_devices_t mDevice; // current device this input is routed to 497 audio_patch_handle_t mPatchHandle; 498 uint32_t mRefCount; // number of AudioRecord clients using 499 // this input 500 uint32_t mOpenRefCount; 501 audio_source_t mInputSource; // input source selected by application 502 //(mediarecorder.h) 503 const sp<IOProfile> mProfile; // I/O profile this output derives from 504 SortedVector<audio_session_t> mSessions; // audio sessions attached to this input 505 bool mIsSoundTrigger; // used by a soundtrigger capture 506 507 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 508 const struct audio_port_config *srcConfig = NULL) const; 509 void toAudioPort(struct audio_port *port) const; 510 }; 511 512 // stream descriptor used for volume control 513 class StreamDescriptor 514 { 515 public: 516 StreamDescriptor(); 517 518 int getVolumeIndex(audio_devices_t device); 519 void dump(int fd); 520 521 int mIndexMin; // min volume index 522 int mIndexMax; // max volume index 523 KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device 524 bool mCanBeMuted; // true is the stream can be muted 525 526 const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT]; 527 }; 528 529 // stream descriptor used for volume control 530 class EffectDescriptor : public RefBase 531 { 532 public: 533 534 status_t dump(int fd); 535 536 int mIo; // io the effect is attached to 537 routing_strategy mStrategy; // routing strategy the effect is associated to 538 int mSession; // audio session the effect is on 539 effect_descriptor_t mDesc; // effect descriptor 540 bool mEnabled; // enabled state: CPU load being used or not 541 }; 542 543 void addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc); 544 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 545 546 // return the strategy corresponding to a given stream type 547 static routing_strategy getStrategy(audio_stream_type_t stream); 548 549 // return appropriate device for streams handled by the specified strategy according to current 550 // phone state, connected devices... 551 // if fromCache is true, the device is returned from mDeviceForStrategy[], 552 // otherwise it is determine by current state 553 // (device connected,phone state, force use, a2dp output...) 554 // This allows to: 555 // 1 speed up process when the state is stable (when starting or stopping an output) 556 // 2 access to either current device selection (fromCache == true) or 557 // "future" device selection (fromCache == false) when called from a context 558 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 559 // before updateDevicesAndOutputs() is called. 560 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 561 bool fromCache); 562 563 // change the route of the specified output. Returns the number of ms we have slept to 564 // allow new routing to take effect in certain cases. 565 uint32_t setOutputDevice(audio_io_handle_t output, 566 audio_devices_t device, 567 bool force = false, 568 int delayMs = 0, 569 audio_patch_handle_t *patchHandle = NULL, 570 const char* address = NULL); 571 status_t resetOutputDevice(audio_io_handle_t output, 572 int delayMs = 0, 573 audio_patch_handle_t *patchHandle = NULL); 574 status_t setInputDevice(audio_io_handle_t input, 575 audio_devices_t device, 576 bool force = false, 577 audio_patch_handle_t *patchHandle = NULL); 578 status_t resetInputDevice(audio_io_handle_t input, 579 audio_patch_handle_t *patchHandle = NULL); 580 581 // select input device corresponding to requested audio source 582 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 583 584 // return io handle of active input or 0 if no input is active 585 // Only considers inputs from physical devices (e.g. main mic, headset mic) when 586 // ignoreVirtualInputs is true. 587 audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true); 588 589 uint32_t activeInputsCount() const; 590 591 // initialize volume curves for each strategy and device category 592 void initializeVolumeCurves(); 593 594 // compute the actual volume for a given stream according to the requested index and a particular 595 // device 596 virtual float computeVolume(audio_stream_type_t stream, int index, 597 audio_io_handle_t output, audio_devices_t device); 598 599 // check that volume change is permitted, compute and send new volume to audio hardware 600 status_t checkAndSetVolume(audio_stream_type_t stream, int index, audio_io_handle_t output, 601 audio_devices_t device, int delayMs = 0, bool force = false); 602 603 // apply all stream volumes to the specified output and device 604 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 605 606 // Mute or unmute all streams handled by the specified strategy on the specified output 607 void setStrategyMute(routing_strategy strategy, 608 bool on, 609 audio_io_handle_t output, 610 int delayMs = 0, 611 audio_devices_t device = (audio_devices_t)0); 612 613 // Mute or unmute the stream on the specified output 614 void setStreamMute(audio_stream_type_t stream, 615 bool on, 616 audio_io_handle_t output, 617 int delayMs = 0, 618 audio_devices_t device = (audio_devices_t)0); 619 620 // handle special cases for sonification strategy while in call: mute streams or replace by 621 // a special tone in the device used for communication 622 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 623 624 // true if device is in a telephony or VoIP call 625 virtual bool isInCall(); 626 627 // true if given state represents a device in a telephony or VoIP call 628 virtual bool isStateInCall(int state); 629 630 // when a device is connected, checks if an open output can be routed 631 // to this device. If none is open, tries to open one of the available outputs. 632 // Returns an output suitable to this device or 0. 633 // when a device is disconnected, checks if an output is not used any more and 634 // returns its handle if any. 635 // transfers the audio tracks and effects from one output thread to another accordingly. 636 status_t checkOutputsForDevice(const sp<DeviceDescriptor> devDesc, 637 audio_policy_dev_state_t state, 638 SortedVector<audio_io_handle_t>& outputs, 639 const String8 address); 640 641 status_t checkInputsForDevice(audio_devices_t device, 642 audio_policy_dev_state_t state, 643 SortedVector<audio_io_handle_t>& inputs, 644 const String8 address); 645 646 // close an output and its companion duplicating output. 647 void closeOutput(audio_io_handle_t output); 648 649 // checks and if necessary changes outputs used for all strategies. 650 // must be called every time a condition that affects the output choice for a given strategy 651 // changes: connected device, phone state, force use... 652 // Must be called before updateDevicesAndOutputs() 653 void checkOutputForStrategy(routing_strategy strategy); 654 655 // Same as checkOutputForStrategy() but for a all strategies in order of priority 656 void checkOutputForAllStrategies(); 657 658 // manages A2DP output suspend/restore according to phone state and BT SCO usage 659 void checkA2dpSuspend(); 660 661 // returns the A2DP output handle if it is open or 0 otherwise 662 audio_io_handle_t getA2dpOutput(); 663 664 // selects the most appropriate device on output for current state 665 // must be called every time a condition that affects the device choice for a given output is 666 // changed: connected device, phone state, force use, output start, output stop.. 667 // see getDeviceForStrategy() for the use of fromCache parameter 668 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 669 670 // updates cache of device used by all strategies (mDeviceForStrategy[]) 671 // must be called every time a condition that affects the device choice for a given strategy is 672 // changed: connected device, phone state, force use... 673 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 674 // Must be called after checkOutputForAllStrategies() 675 void updateDevicesAndOutputs(); 676 677 // selects the most appropriate device on input for current state 678 audio_devices_t getNewInputDevice(audio_io_handle_t input); 679 680 virtual uint32_t getMaxEffectsCpuLoad(); 681 virtual uint32_t getMaxEffectsMemory(); 682#ifdef AUDIO_POLICY_TEST 683 virtual bool threadLoop(); 684 void exit(); 685 int testOutputIndex(audio_io_handle_t output); 686#endif //AUDIO_POLICY_TEST 687 688 status_t setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled); 689 690 // returns the category the device belongs to with regard to volume curve management 691 static device_category getDeviceCategory(audio_devices_t device); 692 693 // extract one device relevant for volume control from multiple device selection 694 static audio_devices_t getDeviceForVolume(audio_devices_t device); 695 696 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 697 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs); 698 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 699 SortedVector<audio_io_handle_t>& outputs2); 700 701 // mute/unmute strategies using an incompatible device combination 702 // if muting, wait for the audio in pcm buffer to be drained before proceeding 703 // if unmuting, unmute only after the specified delay 704 // Returns the number of ms waited 705 uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 706 audio_devices_t prevDevice, 707 uint32_t delayMs); 708 709 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 710 audio_output_flags_t flags); 711 // samplingRate parameter is an in/out and so may be modified 712 sp<IOProfile> getInputProfile(audio_devices_t device, 713 uint32_t& samplingRate, 714 audio_format_t format, 715 audio_channel_mask_t channelMask, 716 audio_input_flags_t flags); 717 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 718 uint32_t samplingRate, 719 audio_format_t format, 720 audio_channel_mask_t channelMask, 721 audio_output_flags_t flags); 722 723 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 724 725 bool isNonOffloadableEffectEnabled(); 726 727 status_t addAudioPatch(audio_patch_handle_t handle, 728 const sp<AudioPatch>& patch); 729 status_t removeAudioPatch(audio_patch_handle_t handle); 730 731 sp<AudioOutputDescriptor> getOutputFromId(audio_port_handle_t id) const; 732 sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const; 733 sp<HwModule> getModuleForDevice(audio_devices_t device) const; 734 sp<HwModule> getModuleFromName(const char *name) const; 735 audio_devices_t availablePrimaryOutputDevices(); 736 audio_devices_t availablePrimaryInputDevices(); 737 738 void updateCallRouting(audio_devices_t rxDevice, int delayMs = 0); 739 740 // 741 // Audio policy configuration file parsing (audio_policy.conf) 742 // 743 static uint32_t stringToEnum(const struct StringToEnum *table, 744 size_t size, 745 const char *name); 746 static const char *enumToString(const struct StringToEnum *table, 747 size_t size, 748 uint32_t value); 749 static bool stringToBool(const char *value); 750 static audio_output_flags_t parseFlagNames(char *name); 751 static audio_devices_t parseDeviceNames(char *name); 752 void loadHwModule(cnode *root); 753 void loadHwModules(cnode *root); 754 void loadGlobalConfig(cnode *root, const sp<HwModule>& module); 755 status_t loadAudioPolicyConfig(const char *path); 756 void defaultAudioPolicyConfig(void); 757 758 759 uid_t mUidCached; 760 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 761 audio_io_handle_t mPrimaryOutput; // primary output handle 762 // list of descriptors for outputs currently opened 763 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mOutputs; 764 // copy of mOutputs before setDeviceConnectionState() opens new outputs 765 // reset to mOutputs when updateDevicesAndOutputs() is called. 766 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mPreviousOutputs; 767 DefaultKeyedVector<audio_io_handle_t, sp<AudioInputDescriptor> > mInputs; // list of input descriptors 768 DeviceVector mAvailableOutputDevices; // all available output devices 769 DeviceVector mAvailableInputDevices; // all available input devices 770 int mPhoneState; // current phone state 771 audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT]; // current forced use configuration 772 773 StreamDescriptor mStreams[AUDIO_STREAM_CNT]; // stream descriptors for volume control 774 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 775 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 776 float mLastVoiceVolume; // last voice volume value sent to audio HAL 777 778 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 779 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 780 // Maximum memory allocated to audio effects in KB 781 static const uint32_t MAX_EFFECTS_MEMORY = 512; 782 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 783 uint32_t mTotalEffectsMemory; // current memory used by effects 784 KeyedVector<int, sp<EffectDescriptor> > mEffects; // list of registered audio effects 785 bool mA2dpSuspended; // true if A2DP output is suspended 786 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 787 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 788 // to boost soft sounds, used to adjust volume curves accordingly 789 790 Vector < sp<HwModule> > mHwModules; 791 volatile int32_t mNextUniqueId; 792 volatile int32_t mAudioPortGeneration; 793 794 DefaultKeyedVector<audio_patch_handle_t, sp<AudioPatch> > mAudioPatches; 795 796 DefaultKeyedVector<audio_session_t, audio_io_handle_t> mSoundTriggerSessions; 797 798 sp<AudioPatch> mCallTxPatch; 799 sp<AudioPatch> mCallRxPatch; 800 801#ifdef AUDIO_POLICY_TEST 802 Mutex mLock; 803 Condition mWaitWorkCV; 804 805 int mCurOutput; 806 bool mDirectOutput; 807 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 808 int mTestInput; 809 uint32_t mTestDevice; 810 uint32_t mTestSamplingRate; 811 uint32_t mTestFormat; 812 uint32_t mTestChannels; 813 uint32_t mTestLatencyMs; 814#endif //AUDIO_POLICY_TEST 815 816private: 817 static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, 818 int indexInUi); 819 // updates device caching and output for streams that can influence the 820 // routing of notifications 821 void handleNotificationRoutingForStream(audio_stream_type_t stream); 822 static bool isVirtualInputDevice(audio_devices_t device); 823 static bool deviceDistinguishesOnAddress(audio_devices_t device); 824 // find the outputs on a given output descriptor that have the given address. 825 // to be called on an AudioOutputDescriptor whose supported devices (as defined 826 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 827 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 828 // where addresses are used to distinguish between one connected device and another. 829 void findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/, 830 const String8 address /*in*/, 831 SortedVector<audio_io_handle_t>& outputs /*out*/); 832 uint32_t nextUniqueId(); 833 uint32_t nextAudioPortGeneration(); 834 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 835 // internal method to return the output handle for the given device and format 836 audio_io_handle_t getOutputForDevice( 837 audio_devices_t device, 838 audio_stream_type_t stream, 839 uint32_t samplingRate, 840 audio_format_t format, 841 audio_channel_mask_t channelMask, 842 audio_output_flags_t flags, 843 const audio_offload_info_t *offloadInfo); 844 // internal function to derive a stream type value from audio attributes 845 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 846}; 847 848}; 849