AudioPolicyManager.h revision df3dc7e2fe6c639529b70e3f3a7d2bf0f4c6e871
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_CNT 212 }; 213 214 class HwModule; 215 216 class AudioGain: public RefBase 217 { 218 public: 219 AudioGain(int index, bool useInChannelMask); 220 virtual ~AudioGain() {} 221 222 void dump(int fd, int spaces, int index) const; 223 224 void getDefaultConfig(struct audio_gain_config *config); 225 status_t checkConfig(const struct audio_gain_config *config); 226 int mIndex; 227 struct audio_gain mGain; 228 bool mUseInChannelMask; 229 }; 230 231 class AudioPort: public virtual RefBase 232 { 233 public: 234 AudioPort(const String8& name, audio_port_type_t type, 235 audio_port_role_t role, const sp<HwModule>& module); 236 virtual ~AudioPort() {} 237 238 virtual void toAudioPort(struct audio_port *port) const; 239 240 void loadSamplingRates(char *name); 241 void loadFormats(char *name); 242 void loadOutChannels(char *name); 243 void loadInChannels(char *name); 244 245 audio_gain_mode_t loadGainMode(char *name); 246 void loadGain(cnode *root, int index); 247 void loadGains(cnode *root); 248 249 // searches for an exact match 250 status_t checkExactSamplingRate(uint32_t samplingRate) const; 251 // searches for a compatible match, and returns the best match via updatedSamplingRate 252 status_t checkCompatibleSamplingRate(uint32_t samplingRate, 253 uint32_t *updatedSamplingRate) const; 254 // searches for an exact match 255 status_t checkExactChannelMask(audio_channel_mask_t channelMask) const; 256 // searches for a compatible match, currently implemented for input channel masks only 257 status_t checkCompatibleChannelMask(audio_channel_mask_t channelMask) const; 258 status_t checkFormat(audio_format_t format) const; 259 status_t checkGain(const struct audio_gain_config *gainConfig, int index) const; 260 261 uint32_t pickSamplingRate() const; 262 audio_channel_mask_t pickChannelMask() const; 263 audio_format_t pickFormat() const; 264 265 static const audio_format_t sPcmFormatCompareTable[]; 266 static int compareFormats(audio_format_t format1, audio_format_t format2); 267 268 void dump(int fd, int spaces) const; 269 270 String8 mName; 271 audio_port_type_t mType; 272 audio_port_role_t mRole; 273 bool mUseInChannelMask; 274 // by convention, "0' in the first entry in mSamplingRates, mChannelMasks or mFormats 275 // indicates the supported parameters should be read from the output stream 276 // after it is opened for the first time 277 Vector <uint32_t> mSamplingRates; // supported sampling rates 278 Vector <audio_channel_mask_t> mChannelMasks; // supported channel masks 279 Vector <audio_format_t> mFormats; // supported audio formats 280 Vector < sp<AudioGain> > mGains; // gain controllers 281 sp<HwModule> mModule; // audio HW module exposing this I/O stream 282 audio_output_flags_t mFlags; // attribute flags (e.g primary output, 283 // direct output...). For outputs only. 284 }; 285 286 class AudioPortConfig: public virtual RefBase 287 { 288 public: 289 AudioPortConfig(); 290 virtual ~AudioPortConfig() {} 291 292 status_t applyAudioPortConfig(const struct audio_port_config *config, 293 struct audio_port_config *backupConfig = NULL); 294 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 295 const struct audio_port_config *srcConfig = NULL) const = 0; 296 sp<AudioPort> mAudioPort; 297 uint32_t mSamplingRate; 298 audio_format_t mFormat; 299 audio_channel_mask_t mChannelMask; 300 struct audio_gain_config mGain; 301 }; 302 303 304 class AudioPatch: public RefBase 305 { 306 public: 307 AudioPatch(audio_patch_handle_t handle, 308 const struct audio_patch *patch, uid_t uid) : 309 mHandle(handle), mPatch(*patch), mUid(uid), mAfPatchHandle(0) {} 310 311 audio_patch_handle_t mHandle; 312 struct audio_patch mPatch; 313 uid_t mUid; 314 audio_patch_handle_t mAfPatchHandle; 315 }; 316 317 class DeviceDescriptor: public AudioPort, public AudioPortConfig 318 { 319 public: 320 DeviceDescriptor(const String8& name, audio_devices_t type); 321 322 virtual ~DeviceDescriptor() {} 323 324 bool equals(const sp<DeviceDescriptor>& other) const; 325 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 326 const struct audio_port_config *srcConfig = NULL) const; 327 328 virtual void toAudioPort(struct audio_port *port) const; 329 330 status_t dump(int fd, int spaces, int index) const; 331 332 audio_devices_t mDeviceType; 333 String8 mAddress; 334 audio_port_handle_t mId; 335 }; 336 337 class DeviceVector : public SortedVector< sp<DeviceDescriptor> > 338 { 339 public: 340 DeviceVector() : SortedVector(), mDeviceTypes(AUDIO_DEVICE_NONE) {} 341 342 ssize_t add(const sp<DeviceDescriptor>& item); 343 ssize_t remove(const sp<DeviceDescriptor>& item); 344 ssize_t indexOf(const sp<DeviceDescriptor>& item) const; 345 346 audio_devices_t types() const { return mDeviceTypes; } 347 348 void loadDevicesFromType(audio_devices_t types); 349 void loadDevicesFromName(char *name, const DeviceVector& declaredDevices); 350 351 sp<DeviceDescriptor> getDevice(audio_devices_t type, String8 address) const; 352 DeviceVector getDevicesFromType(audio_devices_t types) const; 353 sp<DeviceDescriptor> getDeviceFromId(audio_port_handle_t id) const; 354 sp<DeviceDescriptor> getDeviceFromName(const String8& name) const; 355 DeviceVector getDevicesFromTypeAddr(audio_devices_t type, String8 address) 356 const; 357 358 private: 359 void refreshTypes(); 360 audio_devices_t mDeviceTypes; 361 }; 362 363 // the IOProfile class describes the capabilities of an output or input stream. 364 // It is currently assumed that all combination of listed parameters are supported. 365 // It is used by the policy manager to determine if an output or input is suitable for 366 // a given use case, open/close it accordingly and connect/disconnect audio tracks 367 // to/from it. 368 class IOProfile : public AudioPort 369 { 370 public: 371 IOProfile(const String8& name, audio_port_role_t role, const sp<HwModule>& module); 372 virtual ~IOProfile(); 373 374 // This method is used for both output and input. 375 // If parameter updatedSamplingRate is non-NULL, it is assigned the actual sample rate. 376 // For input, flags is interpreted as audio_input_flags_t. 377 // TODO: merge audio_output_flags_t and audio_input_flags_t. 378 bool isCompatibleProfile(audio_devices_t device, 379 uint32_t samplingRate, 380 uint32_t *updatedSamplingRate, 381 audio_format_t format, 382 audio_channel_mask_t channelMask, 383 audio_output_flags_t flags) const; 384 385 void dump(int fd); 386 void log(); 387 388 DeviceVector mSupportedDevices; // supported devices 389 // (devices this output can be routed to) 390 }; 391 392 class HwModule : public RefBase 393 { 394 public: 395 HwModule(const char *name); 396 ~HwModule(); 397 398 status_t loadOutput(cnode *root); 399 status_t loadInput(cnode *root); 400 status_t loadDevice(cnode *root); 401 402 void dump(int fd); 403 404 const char *const mName; // base name of the audio HW module (primary, a2dp ...) 405 uint32_t mHalVersion; // audio HAL API version 406 audio_module_handle_t mHandle; 407 Vector < sp<IOProfile> > mOutputProfiles; // output profiles exposed by this module 408 Vector < sp<IOProfile> > mInputProfiles; // input profiles exposed by this module 409 DeviceVector mDeclaredDevices; // devices declared in audio_policy.conf 410 411 }; 412 413 // default volume curve 414 static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManager::VOLCNT]; 415 // default volume curve for media strategy 416 static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 417 // volume curve for media strategy on speakers 418 static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 419 static const VolumeCurvePoint sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 420 // volume curve for sonification strategy on speakers 421 static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT]; 422 static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 423 static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 424 static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 425 static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 426 static const VolumeCurvePoint sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 427 static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 428 // default volume curves per stream and device category. See initializeVolumeCurves() 429 static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][DEVICE_CATEGORY_CNT]; 430 431 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output 432 // and keep track of the usage of this output by each audio stream type. 433 class AudioOutputDescriptor: public AudioPortConfig 434 { 435 public: 436 AudioOutputDescriptor(const sp<IOProfile>& profile); 437 438 status_t dump(int fd); 439 440 audio_devices_t device() const; 441 void changeRefCount(audio_stream_type_t stream, int delta); 442 443 bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); } 444 audio_devices_t supportedDevices(); 445 uint32_t latency(); 446 bool sharesHwModuleWith(const sp<AudioOutputDescriptor> outputDesc); 447 bool isActive(uint32_t inPastMs = 0) const; 448 bool isStreamActive(audio_stream_type_t stream, 449 uint32_t inPastMs = 0, 450 nsecs_t sysTime = 0) const; 451 bool isStrategyActive(routing_strategy strategy, 452 uint32_t inPastMs = 0, 453 nsecs_t sysTime = 0) const; 454 455 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 456 const struct audio_port_config *srcConfig = NULL) const; 457 void toAudioPort(struct audio_port *port) const; 458 459 audio_port_handle_t mId; 460 audio_io_handle_t mIoHandle; // output handle 461 uint32_t mLatency; // 462 audio_output_flags_t mFlags; // 463 audio_devices_t mDevice; // current device this output is routed to 464 audio_patch_handle_t mPatchHandle; 465 uint32_t mRefCount[AUDIO_STREAM_CNT]; // number of streams of each type using this output 466 nsecs_t mStopTime[AUDIO_STREAM_CNT]; 467 sp<AudioOutputDescriptor> mOutput1; // used by duplicated outputs: first output 468 sp<AudioOutputDescriptor> mOutput2; // used by duplicated outputs: second output 469 float mCurVolume[AUDIO_STREAM_CNT]; // current stream volume 470 int mMuteCount[AUDIO_STREAM_CNT]; // mute request counter 471 const sp<IOProfile> mProfile; // I/O profile this output derives from 472 bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible 473 // device selection. See checkDeviceMuteStrategies() 474 uint32_t mDirectOpenCount; // number of clients using this output (direct outputs only) 475 }; 476 477 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 478 // and keep track of the usage of this input. 479 class AudioInputDescriptor: public AudioPortConfig 480 { 481 public: 482 AudioInputDescriptor(const sp<IOProfile>& profile); 483 484 status_t dump(int fd); 485 486 audio_port_handle_t mId; 487 audio_io_handle_t mIoHandle; // input handle 488 audio_devices_t mDevice; // current device this input is routed to 489 audio_patch_handle_t mPatchHandle; 490 uint32_t mRefCount; // number of AudioRecord clients using 491 // this input 492 uint32_t mOpenRefCount; 493 audio_source_t mInputSource; // input source selected by application 494 //(mediarecorder.h) 495 const sp<IOProfile> mProfile; // I/O profile this output derives from 496 SortedVector<audio_session_t> mSessions; // audio sessions attached to this input 497 bool mIsSoundTrigger; // used by a soundtrigger capture 498 499 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 500 const struct audio_port_config *srcConfig = NULL) const; 501 void toAudioPort(struct audio_port *port) const; 502 }; 503 504 // stream descriptor used for volume control 505 class StreamDescriptor 506 { 507 public: 508 StreamDescriptor(); 509 510 int getVolumeIndex(audio_devices_t device); 511 void dump(int fd); 512 513 int mIndexMin; // min volume index 514 int mIndexMax; // max volume index 515 KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device 516 bool mCanBeMuted; // true is the stream can be muted 517 518 const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT]; 519 }; 520 521 // stream descriptor used for volume control 522 class EffectDescriptor : public RefBase 523 { 524 public: 525 526 status_t dump(int fd); 527 528 int mIo; // io the effect is attached to 529 routing_strategy mStrategy; // routing strategy the effect is associated to 530 int mSession; // audio session the effect is on 531 effect_descriptor_t mDesc; // effect descriptor 532 bool mEnabled; // enabled state: CPU load being used or not 533 }; 534 535 void addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc); 536 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 537 538 // return the strategy corresponding to a given stream type 539 static routing_strategy getStrategy(audio_stream_type_t stream); 540 541 // return appropriate device for streams handled by the specified strategy according to current 542 // phone state, connected devices... 543 // if fromCache is true, the device is returned from mDeviceForStrategy[], 544 // otherwise it is determine by current state 545 // (device connected,phone state, force use, a2dp output...) 546 // This allows to: 547 // 1 speed up process when the state is stable (when starting or stopping an output) 548 // 2 access to either current device selection (fromCache == true) or 549 // "future" device selection (fromCache == false) when called from a context 550 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 551 // before updateDevicesAndOutputs() is called. 552 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 553 bool fromCache); 554 555 // change the route of the specified output. Returns the number of ms we have slept to 556 // allow new routing to take effect in certain cases. 557 uint32_t setOutputDevice(audio_io_handle_t output, 558 audio_devices_t device, 559 bool force = false, 560 int delayMs = 0, 561 audio_patch_handle_t *patchHandle = NULL, 562 const char* address = NULL); 563 status_t resetOutputDevice(audio_io_handle_t output, 564 int delayMs = 0, 565 audio_patch_handle_t *patchHandle = NULL); 566 status_t setInputDevice(audio_io_handle_t input, 567 audio_devices_t device, 568 bool force = false, 569 audio_patch_handle_t *patchHandle = NULL); 570 status_t resetInputDevice(audio_io_handle_t input, 571 audio_patch_handle_t *patchHandle = NULL); 572 573 // select input device corresponding to requested audio source 574 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 575 576 // return io handle of active input or 0 if no input is active 577 // Only considers inputs from physical devices (e.g. main mic, headset mic) when 578 // ignoreVirtualInputs is true. 579 audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true); 580 581 uint32_t activeInputsCount() const; 582 583 // initialize volume curves for each strategy and device category 584 void initializeVolumeCurves(); 585 586 // compute the actual volume for a given stream according to the requested index and a particular 587 // device 588 virtual float computeVolume(audio_stream_type_t stream, int index, 589 audio_io_handle_t output, audio_devices_t device); 590 591 // check that volume change is permitted, compute and send new volume to audio hardware 592 status_t checkAndSetVolume(audio_stream_type_t stream, int index, audio_io_handle_t output, 593 audio_devices_t device, int delayMs = 0, bool force = false); 594 595 // apply all stream volumes to the specified output and device 596 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 597 598 // Mute or unmute all streams handled by the specified strategy on the specified output 599 void setStrategyMute(routing_strategy strategy, 600 bool on, 601 audio_io_handle_t output, 602 int delayMs = 0, 603 audio_devices_t device = (audio_devices_t)0); 604 605 // Mute or unmute the stream on the specified output 606 void setStreamMute(audio_stream_type_t stream, 607 bool on, 608 audio_io_handle_t output, 609 int delayMs = 0, 610 audio_devices_t device = (audio_devices_t)0); 611 612 // handle special cases for sonification strategy while in call: mute streams or replace by 613 // a special tone in the device used for communication 614 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 615 616 // true if device is in a telephony or VoIP call 617 virtual bool isInCall(); 618 619 // true if given state represents a device in a telephony or VoIP call 620 virtual bool isStateInCall(int state); 621 622 // when a device is connected, checks if an open output can be routed 623 // to this device. If none is open, tries to open one of the available outputs. 624 // Returns an output suitable to this device or 0. 625 // when a device is disconnected, checks if an output is not used any more and 626 // returns its handle if any. 627 // transfers the audio tracks and effects from one output thread to another accordingly. 628 status_t checkOutputsForDevice(audio_devices_t device, 629 audio_policy_dev_state_t state, 630 SortedVector<audio_io_handle_t>& outputs, 631 const String8 address); 632 633 status_t checkInputsForDevice(audio_devices_t device, 634 audio_policy_dev_state_t state, 635 SortedVector<audio_io_handle_t>& inputs, 636 const String8 address); 637 638 // close an output and its companion duplicating output. 639 void closeOutput(audio_io_handle_t output); 640 641 // checks and if necessary changes outputs used for all strategies. 642 // must be called every time a condition that affects the output choice for a given strategy 643 // changes: connected device, phone state, force use... 644 // Must be called before updateDevicesAndOutputs() 645 void checkOutputForStrategy(routing_strategy strategy); 646 647 // Same as checkOutputForStrategy() but for a all strategies in order of priority 648 void checkOutputForAllStrategies(); 649 650 // manages A2DP output suspend/restore according to phone state and BT SCO usage 651 void checkA2dpSuspend(); 652 653 // returns the A2DP output handle if it is open or 0 otherwise 654 audio_io_handle_t getA2dpOutput(); 655 656 // selects the most appropriate device on output for current state 657 // must be called every time a condition that affects the device choice for a given output is 658 // changed: connected device, phone state, force use, output start, output stop.. 659 // see getDeviceForStrategy() for the use of fromCache parameter 660 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 661 662 // updates cache of device used by all strategies (mDeviceForStrategy[]) 663 // must be called every time a condition that affects the device choice for a given strategy is 664 // changed: connected device, phone state, force use... 665 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 666 // Must be called after checkOutputForAllStrategies() 667 void updateDevicesAndOutputs(); 668 669 // selects the most appropriate device on input for current state 670 audio_devices_t getNewInputDevice(audio_io_handle_t input); 671 672 virtual uint32_t getMaxEffectsCpuLoad(); 673 virtual uint32_t getMaxEffectsMemory(); 674#ifdef AUDIO_POLICY_TEST 675 virtual bool threadLoop(); 676 void exit(); 677 int testOutputIndex(audio_io_handle_t output); 678#endif //AUDIO_POLICY_TEST 679 680 status_t setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled); 681 682 // returns the category the device belongs to with regard to volume curve management 683 static device_category getDeviceCategory(audio_devices_t device); 684 685 // extract one device relevant for volume control from multiple device selection 686 static audio_devices_t getDeviceForVolume(audio_devices_t device); 687 688 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 689 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs); 690 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 691 SortedVector<audio_io_handle_t>& outputs2); 692 693 // mute/unmute strategies using an incompatible device combination 694 // if muting, wait for the audio in pcm buffer to be drained before proceeding 695 // if unmuting, unmute only after the specified delay 696 // Returns the number of ms waited 697 uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 698 audio_devices_t prevDevice, 699 uint32_t delayMs); 700 701 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 702 audio_output_flags_t flags); 703 // samplingRate parameter is an in/out and so may be modified 704 sp<IOProfile> getInputProfile(audio_devices_t device, 705 uint32_t& samplingRate, 706 audio_format_t format, 707 audio_channel_mask_t channelMask, 708 audio_input_flags_t flags); 709 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 710 uint32_t samplingRate, 711 audio_format_t format, 712 audio_channel_mask_t channelMask, 713 audio_output_flags_t flags); 714 715 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 716 717 bool isNonOffloadableEffectEnabled(); 718 719 status_t addAudioPatch(audio_patch_handle_t handle, 720 const sp<AudioPatch>& patch); 721 status_t removeAudioPatch(audio_patch_handle_t handle); 722 723 sp<AudioOutputDescriptor> getOutputFromId(audio_port_handle_t id) const; 724 sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const; 725 sp<HwModule> getModuleForDevice(audio_devices_t device) const; 726 sp<HwModule> getModuleFromName(const char *name) const; 727 // 728 // Audio policy configuration file parsing (audio_policy.conf) 729 // 730 static uint32_t stringToEnum(const struct StringToEnum *table, 731 size_t size, 732 const char *name); 733 static const char *enumToString(const struct StringToEnum *table, 734 size_t size, 735 uint32_t value); 736 static bool stringToBool(const char *value); 737 static audio_output_flags_t parseFlagNames(char *name); 738 static audio_devices_t parseDeviceNames(char *name); 739 void loadHwModule(cnode *root); 740 void loadHwModules(cnode *root); 741 void loadGlobalConfig(cnode *root, const sp<HwModule>& module); 742 status_t loadAudioPolicyConfig(const char *path); 743 void defaultAudioPolicyConfig(void); 744 745 746 uid_t mUidCached; 747 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 748 audio_io_handle_t mPrimaryOutput; // primary output handle 749 // list of descriptors for outputs currently opened 750 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mOutputs; 751 // copy of mOutputs before setDeviceConnectionState() opens new outputs 752 // reset to mOutputs when updateDevicesAndOutputs() is called. 753 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mPreviousOutputs; 754 DefaultKeyedVector<audio_io_handle_t, sp<AudioInputDescriptor> > mInputs; // list of input descriptors 755 DeviceVector mAvailableOutputDevices; // all available output devices 756 DeviceVector mAvailableInputDevices; // all available input devices 757 int mPhoneState; // current phone state 758 audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT]; // current forced use configuration 759 760 StreamDescriptor mStreams[AUDIO_STREAM_CNT]; // stream descriptors for volume control 761 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 762 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 763 float mLastVoiceVolume; // last voice volume value sent to audio HAL 764 765 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 766 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 767 // Maximum memory allocated to audio effects in KB 768 static const uint32_t MAX_EFFECTS_MEMORY = 512; 769 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 770 uint32_t mTotalEffectsMemory; // current memory used by effects 771 KeyedVector<int, sp<EffectDescriptor> > mEffects; // list of registered audio effects 772 bool mA2dpSuspended; // true if A2DP output is suspended 773 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 774 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 775 // to boost soft sounds, used to adjust volume curves accordingly 776 777 Vector < sp<HwModule> > mHwModules; 778 volatile int32_t mNextUniqueId; 779 volatile int32_t mAudioPortGeneration; 780 781 DefaultKeyedVector<audio_patch_handle_t, sp<AudioPatch> > mAudioPatches; 782 783 DefaultKeyedVector<audio_session_t, audio_io_handle_t> mSoundTriggerSessions; 784 785#ifdef AUDIO_POLICY_TEST 786 Mutex mLock; 787 Condition mWaitWorkCV; 788 789 int mCurOutput; 790 bool mDirectOutput; 791 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 792 int mTestInput; 793 uint32_t mTestDevice; 794 uint32_t mTestSamplingRate; 795 uint32_t mTestFormat; 796 uint32_t mTestChannels; 797 uint32_t mTestLatencyMs; 798#endif //AUDIO_POLICY_TEST 799 800private: 801 static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, 802 int indexInUi); 803 // updates device caching and output for streams that can influence the 804 // routing of notifications 805 void handleNotificationRoutingForStream(audio_stream_type_t stream); 806 static bool isVirtualInputDevice(audio_devices_t device); 807 static bool deviceDistinguishesOnAddress(audio_devices_t device); 808 // find the outputs on a given output descriptor that have the given address. 809 // to be called on an AudioOutputDescriptor whose supported devices (as defined 810 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 811 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 812 // where addresses are used to distinguish between one connected device and another. 813 void findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/, 814 const String8 address /*in*/, 815 SortedVector<audio_io_handle_t>& outputs /*out*/); 816 uint32_t nextUniqueId(); 817 uint32_t nextAudioPortGeneration(); 818 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 819 // internal method to return the output handle for the given device and format 820 audio_io_handle_t getOutputForDevice( 821 audio_devices_t device, 822 audio_stream_type_t stream, 823 uint32_t samplingRate, 824 audio_format_t format, 825 audio_channel_mask_t channelMask, 826 audio_output_flags_t flags, 827 const audio_offload_info_t *offloadInfo); 828 // internal function to derive a stream type value from audio attributes 829 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 830}; 831 832}; 833