AudioPolicyManager.h revision 327cb70dcbf3a1f1679aeafaaa62d8532abea86d
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 uint32_t mFlags; // attribute flags (e.g primary output, 287 // direct output...). 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 virtual sp<AudioPort> getAudioPort() const = 0; 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 virtual sp<AudioPort> getAudioPort() const { return (AudioPort*) this; } 334 335 virtual void toAudioPort(struct audio_port *port) const; 336 337 status_t dump(int fd, int spaces, int index) const; 338 339 audio_devices_t mDeviceType; 340 String8 mAddress; 341 audio_port_handle_t mId; 342 }; 343 344 class DeviceVector : public SortedVector< sp<DeviceDescriptor> > 345 { 346 public: 347 DeviceVector() : SortedVector(), mDeviceTypes(AUDIO_DEVICE_NONE) {} 348 349 ssize_t add(const sp<DeviceDescriptor>& item); 350 ssize_t remove(const sp<DeviceDescriptor>& item); 351 ssize_t indexOf(const sp<DeviceDescriptor>& item) const; 352 353 audio_devices_t types() const { return mDeviceTypes; } 354 355 void loadDevicesFromType(audio_devices_t types); 356 void loadDevicesFromName(char *name, const DeviceVector& declaredDevices); 357 358 sp<DeviceDescriptor> getDevice(audio_devices_t type, String8 address) const; 359 DeviceVector getDevicesFromType(audio_devices_t types) const; 360 sp<DeviceDescriptor> getDeviceFromId(audio_port_handle_t id) const; 361 sp<DeviceDescriptor> getDeviceFromName(const String8& name) const; 362 DeviceVector getDevicesFromTypeAddr(audio_devices_t type, String8 address) 363 const; 364 365 private: 366 void refreshTypes(); 367 audio_devices_t mDeviceTypes; 368 }; 369 370 // the IOProfile class describes the capabilities of an output or input stream. 371 // It is currently assumed that all combination of listed parameters are supported. 372 // It is used by the policy manager to determine if an output or input is suitable for 373 // a given use case, open/close it accordingly and connect/disconnect audio tracks 374 // to/from it. 375 class IOProfile : public AudioPort 376 { 377 public: 378 IOProfile(const String8& name, audio_port_role_t role, const sp<HwModule>& module); 379 virtual ~IOProfile(); 380 381 // This method is used for both output and input. 382 // If parameter updatedSamplingRate is non-NULL, it is assigned the actual sample rate. 383 // For input, flags is interpreted as audio_input_flags_t. 384 // TODO: merge audio_output_flags_t and audio_input_flags_t. 385 bool isCompatibleProfile(audio_devices_t device, 386 uint32_t samplingRate, 387 uint32_t *updatedSamplingRate, 388 audio_format_t format, 389 audio_channel_mask_t channelMask, 390 uint32_t flags) const; 391 392 void dump(int fd); 393 void log(); 394 395 DeviceVector mSupportedDevices; // supported devices 396 // (devices this output can be routed to) 397 }; 398 399 class HwModule : public RefBase 400 { 401 public: 402 HwModule(const char *name); 403 ~HwModule(); 404 405 status_t loadOutput(cnode *root); 406 status_t loadInput(cnode *root); 407 status_t loadDevice(cnode *root); 408 409 void dump(int fd); 410 411 const char *const mName; // base name of the audio HW module (primary, a2dp ...) 412 uint32_t mHalVersion; // audio HAL API version 413 audio_module_handle_t mHandle; 414 Vector < sp<IOProfile> > mOutputProfiles; // output profiles exposed by this module 415 Vector < sp<IOProfile> > mInputProfiles; // input profiles exposed by this module 416 DeviceVector mDeclaredDevices; // devices declared in audio_policy.conf 417 418 }; 419 420 // default volume curve 421 static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManager::VOLCNT]; 422 // default volume curve for media strategy 423 static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 424 // volume curve for non-media audio on ext media outputs (HDMI, Line, etc) 425 static const VolumeCurvePoint sExtMediaSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 426 // volume curve for media strategy on speakers 427 static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 428 static const VolumeCurvePoint sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 429 // volume curve for sonification strategy on speakers 430 static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT]; 431 static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 432 static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 433 static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 434 static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 435 static const VolumeCurvePoint sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 436 static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 437 // default volume curves per stream and device category. See initializeVolumeCurves() 438 static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][DEVICE_CATEGORY_CNT]; 439 440 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output 441 // and keep track of the usage of this output by each audio stream type. 442 class AudioOutputDescriptor: public AudioPortConfig 443 { 444 public: 445 AudioOutputDescriptor(const sp<IOProfile>& profile); 446 447 status_t dump(int fd); 448 449 audio_devices_t device() const; 450 void changeRefCount(audio_stream_type_t stream, int delta); 451 452 bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); } 453 audio_devices_t supportedDevices(); 454 uint32_t latency(); 455 bool sharesHwModuleWith(const sp<AudioOutputDescriptor> outputDesc); 456 bool isActive(uint32_t inPastMs = 0) const; 457 bool isStreamActive(audio_stream_type_t stream, 458 uint32_t inPastMs = 0, 459 nsecs_t sysTime = 0) const; 460 bool isStrategyActive(routing_strategy strategy, 461 uint32_t inPastMs = 0, 462 nsecs_t sysTime = 0) const; 463 464 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 465 const struct audio_port_config *srcConfig = NULL) const; 466 virtual sp<AudioPort> getAudioPort() const { return mProfile; } 467 void toAudioPort(struct audio_port *port) const; 468 469 audio_port_handle_t mId; 470 audio_io_handle_t mIoHandle; // output handle 471 uint32_t mLatency; // 472 audio_output_flags_t mFlags; // 473 audio_devices_t mDevice; // current device this output is routed to 474 audio_patch_handle_t mPatchHandle; 475 uint32_t mRefCount[AUDIO_STREAM_CNT]; // number of streams of each type using this output 476 nsecs_t mStopTime[AUDIO_STREAM_CNT]; 477 sp<AudioOutputDescriptor> mOutput1; // used by duplicated outputs: first output 478 sp<AudioOutputDescriptor> mOutput2; // used by duplicated outputs: second output 479 float mCurVolume[AUDIO_STREAM_CNT]; // current stream volume 480 int mMuteCount[AUDIO_STREAM_CNT]; // mute request counter 481 const sp<IOProfile> mProfile; // I/O profile this output derives from 482 bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible 483 // device selection. See checkDeviceMuteStrategies() 484 uint32_t mDirectOpenCount; // number of clients using this output (direct outputs only) 485 }; 486 487 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 488 // and keep track of the usage of this input. 489 class AudioInputDescriptor: public AudioPortConfig 490 { 491 public: 492 AudioInputDescriptor(const sp<IOProfile>& profile); 493 494 status_t dump(int fd); 495 496 audio_port_handle_t mId; 497 audio_io_handle_t mIoHandle; // input handle 498 audio_devices_t mDevice; // current device this input is routed to 499 audio_patch_handle_t mPatchHandle; 500 uint32_t mRefCount; // number of AudioRecord clients using 501 // this input 502 uint32_t mOpenRefCount; 503 audio_source_t mInputSource; // input source selected by application 504 //(mediarecorder.h) 505 const sp<IOProfile> mProfile; // I/O profile this output derives from 506 SortedVector<audio_session_t> mSessions; // audio sessions attached to this input 507 bool mIsSoundTrigger; // used by a soundtrigger capture 508 509 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 510 const struct audio_port_config *srcConfig = NULL) const; 511 virtual sp<AudioPort> getAudioPort() const { return mProfile; } 512 void toAudioPort(struct audio_port *port) const; 513 }; 514 515 // stream descriptor used for volume control 516 class StreamDescriptor 517 { 518 public: 519 StreamDescriptor(); 520 521 int getVolumeIndex(audio_devices_t device); 522 void dump(int fd); 523 524 int mIndexMin; // min volume index 525 int mIndexMax; // max volume index 526 KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device 527 bool mCanBeMuted; // true is the stream can be muted 528 529 const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT]; 530 }; 531 532 // stream descriptor used for volume control 533 class EffectDescriptor : public RefBase 534 { 535 public: 536 537 status_t dump(int fd); 538 539 int mIo; // io the effect is attached to 540 routing_strategy mStrategy; // routing strategy the effect is associated to 541 int mSession; // audio session the effect is on 542 effect_descriptor_t mDesc; // effect descriptor 543 bool mEnabled; // enabled state: CPU load being used or not 544 }; 545 546 void addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc); 547 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 548 549 // return the strategy corresponding to a given stream type 550 static routing_strategy getStrategy(audio_stream_type_t stream); 551 552 // return appropriate device for streams handled by the specified strategy according to current 553 // phone state, connected devices... 554 // if fromCache is true, the device is returned from mDeviceForStrategy[], 555 // otherwise it is determine by current state 556 // (device connected,phone state, force use, a2dp output...) 557 // This allows to: 558 // 1 speed up process when the state is stable (when starting or stopping an output) 559 // 2 access to either current device selection (fromCache == true) or 560 // "future" device selection (fromCache == false) when called from a context 561 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 562 // before updateDevicesAndOutputs() is called. 563 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 564 bool fromCache); 565 566 // change the route of the specified output. Returns the number of ms we have slept to 567 // allow new routing to take effect in certain cases. 568 uint32_t setOutputDevice(audio_io_handle_t output, 569 audio_devices_t device, 570 bool force = false, 571 int delayMs = 0, 572 audio_patch_handle_t *patchHandle = NULL, 573 const char* address = NULL); 574 status_t resetOutputDevice(audio_io_handle_t output, 575 int delayMs = 0, 576 audio_patch_handle_t *patchHandle = NULL); 577 status_t setInputDevice(audio_io_handle_t input, 578 audio_devices_t device, 579 bool force = false, 580 audio_patch_handle_t *patchHandle = NULL); 581 status_t resetInputDevice(audio_io_handle_t input, 582 audio_patch_handle_t *patchHandle = NULL); 583 584 // select input device corresponding to requested audio source 585 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 586 587 // return io handle of active input or 0 if no input is active 588 // Only considers inputs from physical devices (e.g. main mic, headset mic) when 589 // ignoreVirtualInputs is true. 590 audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true); 591 592 uint32_t activeInputsCount() const; 593 594 // initialize volume curves for each strategy and device category 595 void initializeVolumeCurves(); 596 597 // compute the actual volume for a given stream according to the requested index and a particular 598 // device 599 virtual float computeVolume(audio_stream_type_t stream, int index, 600 audio_io_handle_t output, audio_devices_t device); 601 602 // check that volume change is permitted, compute and send new volume to audio hardware 603 virtual status_t checkAndSetVolume(audio_stream_type_t stream, int index, 604 audio_io_handle_t output, 605 audio_devices_t device, 606 int delayMs = 0, bool force = false); 607 608 // apply all stream volumes to the specified output and device 609 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 610 611 // Mute or unmute all streams handled by the specified strategy on the specified output 612 void setStrategyMute(routing_strategy strategy, 613 bool on, 614 audio_io_handle_t output, 615 int delayMs = 0, 616 audio_devices_t device = (audio_devices_t)0); 617 618 // Mute or unmute the stream on the specified output 619 void setStreamMute(audio_stream_type_t stream, 620 bool on, 621 audio_io_handle_t output, 622 int delayMs = 0, 623 audio_devices_t device = (audio_devices_t)0); 624 625 // handle special cases for sonification strategy while in call: mute streams or replace by 626 // a special tone in the device used for communication 627 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 628 629 // true if device is in a telephony or VoIP call 630 virtual bool isInCall(); 631 632 // true if given state represents a device in a telephony or VoIP call 633 virtual bool isStateInCall(int state); 634 635 // when a device is connected, checks if an open output can be routed 636 // to this device. If none is open, tries to open one of the available outputs. 637 // Returns an output suitable to this device or 0. 638 // when a device is disconnected, checks if an output is not used any more and 639 // returns its handle if any. 640 // transfers the audio tracks and effects from one output thread to another accordingly. 641 status_t checkOutputsForDevice(const sp<DeviceDescriptor> devDesc, 642 audio_policy_dev_state_t state, 643 SortedVector<audio_io_handle_t>& outputs, 644 const String8 address); 645 646 status_t checkInputsForDevice(audio_devices_t device, 647 audio_policy_dev_state_t state, 648 SortedVector<audio_io_handle_t>& inputs, 649 const String8 address); 650 651 // close an output and its companion duplicating output. 652 void closeOutput(audio_io_handle_t output); 653 654 // close an input. 655 void closeInput(audio_io_handle_t input); 656 657 // checks and if necessary changes outputs used for all strategies. 658 // must be called every time a condition that affects the output choice for a given strategy 659 // changes: connected device, phone state, force use... 660 // Must be called before updateDevicesAndOutputs() 661 void checkOutputForStrategy(routing_strategy strategy); 662 663 // Same as checkOutputForStrategy() but for a all strategies in order of priority 664 void checkOutputForAllStrategies(); 665 666 // manages A2DP output suspend/restore according to phone state and BT SCO usage 667 void checkA2dpSuspend(); 668 669 // returns the A2DP output handle if it is open or 0 otherwise 670 audio_io_handle_t getA2dpOutput(); 671 672 // selects the most appropriate device on output for current state 673 // must be called every time a condition that affects the device choice for a given output is 674 // changed: connected device, phone state, force use, output start, output stop.. 675 // see getDeviceForStrategy() for the use of fromCache parameter 676 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 677 678 // updates cache of device used by all strategies (mDeviceForStrategy[]) 679 // must be called every time a condition that affects the device choice for a given strategy is 680 // changed: connected device, phone state, force use... 681 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 682 // Must be called after checkOutputForAllStrategies() 683 void updateDevicesAndOutputs(); 684 685 // selects the most appropriate device on input for current state 686 audio_devices_t getNewInputDevice(audio_io_handle_t input); 687 688 virtual uint32_t getMaxEffectsCpuLoad(); 689 virtual uint32_t getMaxEffectsMemory(); 690#ifdef AUDIO_POLICY_TEST 691 virtual bool threadLoop(); 692 void exit(); 693 int testOutputIndex(audio_io_handle_t output); 694#endif //AUDIO_POLICY_TEST 695 696 status_t setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled); 697 698 // returns the category the device belongs to with regard to volume curve management 699 static device_category getDeviceCategory(audio_devices_t device); 700 701 // extract one device relevant for volume control from multiple device selection 702 static audio_devices_t getDeviceForVolume(audio_devices_t device); 703 704 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 705 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs); 706 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 707 SortedVector<audio_io_handle_t>& outputs2); 708 709 // mute/unmute strategies using an incompatible device combination 710 // if muting, wait for the audio in pcm buffer to be drained before proceeding 711 // if unmuting, unmute only after the specified delay 712 // Returns the number of ms waited 713 uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 714 audio_devices_t prevDevice, 715 uint32_t delayMs); 716 717 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 718 audio_output_flags_t flags, 719 audio_format_t format); 720 // samplingRate parameter is an in/out and so may be modified 721 sp<IOProfile> getInputProfile(audio_devices_t device, 722 uint32_t& samplingRate, 723 audio_format_t format, 724 audio_channel_mask_t channelMask, 725 audio_input_flags_t flags); 726 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 727 uint32_t samplingRate, 728 audio_format_t format, 729 audio_channel_mask_t channelMask, 730 audio_output_flags_t flags); 731 732 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 733 734 bool isNonOffloadableEffectEnabled(); 735 736 status_t addAudioPatch(audio_patch_handle_t handle, 737 const sp<AudioPatch>& patch); 738 status_t removeAudioPatch(audio_patch_handle_t handle); 739 740 sp<AudioOutputDescriptor> getOutputFromId(audio_port_handle_t id) const; 741 sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const; 742 sp<HwModule> getModuleForDevice(audio_devices_t device) const; 743 sp<HwModule> getModuleFromName(const char *name) const; 744 audio_devices_t availablePrimaryOutputDevices(); 745 audio_devices_t availablePrimaryInputDevices(); 746 747 void updateCallRouting(audio_devices_t rxDevice, int delayMs = 0); 748 749 // 750 // Audio policy configuration file parsing (audio_policy.conf) 751 // 752 static uint32_t stringToEnum(const struct StringToEnum *table, 753 size_t size, 754 const char *name); 755 static const char *enumToString(const struct StringToEnum *table, 756 size_t size, 757 uint32_t value); 758 static bool stringToBool(const char *value); 759 static uint32_t parseOutputFlagNames(char *name); 760 static uint32_t parseInputFlagNames(char *name); 761 static audio_devices_t parseDeviceNames(char *name); 762 void loadHwModule(cnode *root); 763 void loadHwModules(cnode *root); 764 void loadGlobalConfig(cnode *root, const sp<HwModule>& module); 765 status_t loadAudioPolicyConfig(const char *path); 766 void defaultAudioPolicyConfig(void); 767 768 769 uid_t mUidCached; 770 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 771 audio_io_handle_t mPrimaryOutput; // primary output handle 772 // list of descriptors for outputs currently opened 773 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mOutputs; 774 // copy of mOutputs before setDeviceConnectionState() opens new outputs 775 // reset to mOutputs when updateDevicesAndOutputs() is called. 776 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mPreviousOutputs; 777 DefaultKeyedVector<audio_io_handle_t, sp<AudioInputDescriptor> > mInputs; // list of input descriptors 778 DeviceVector mAvailableOutputDevices; // all available output devices 779 DeviceVector mAvailableInputDevices; // all available input devices 780 int mPhoneState; // current phone state 781 audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT]; // current forced use configuration 782 783 StreamDescriptor mStreams[AUDIO_STREAM_CNT]; // stream descriptors for volume control 784 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 785 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 786 float mLastVoiceVolume; // last voice volume value sent to audio HAL 787 788 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 789 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 790 // Maximum memory allocated to audio effects in KB 791 static const uint32_t MAX_EFFECTS_MEMORY = 512; 792 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 793 uint32_t mTotalEffectsMemory; // current memory used by effects 794 KeyedVector<int, sp<EffectDescriptor> > mEffects; // list of registered audio effects 795 bool mA2dpSuspended; // true if A2DP output is suspended 796 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 797 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 798 // to boost soft sounds, used to adjust volume curves accordingly 799 800 Vector < sp<HwModule> > mHwModules; 801 volatile int32_t mNextUniqueId; 802 volatile int32_t mAudioPortGeneration; 803 804 DefaultKeyedVector<audio_patch_handle_t, sp<AudioPatch> > mAudioPatches; 805 806 DefaultKeyedVector<audio_session_t, audio_io_handle_t> mSoundTriggerSessions; 807 808 sp<AudioPatch> mCallTxPatch; 809 sp<AudioPatch> mCallRxPatch; 810 811#ifdef AUDIO_POLICY_TEST 812 Mutex mLock; 813 Condition mWaitWorkCV; 814 815 int mCurOutput; 816 bool mDirectOutput; 817 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 818 int mTestInput; 819 uint32_t mTestDevice; 820 uint32_t mTestSamplingRate; 821 uint32_t mTestFormat; 822 uint32_t mTestChannels; 823 uint32_t mTestLatencyMs; 824#endif //AUDIO_POLICY_TEST 825 static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, 826 int indexInUi); 827private: 828 // updates device caching and output for streams that can influence the 829 // routing of notifications 830 void handleNotificationRoutingForStream(audio_stream_type_t stream); 831 static bool isVirtualInputDevice(audio_devices_t device); 832 static bool deviceDistinguishesOnAddress(audio_devices_t device); 833 // find the outputs on a given output descriptor that have the given address. 834 // to be called on an AudioOutputDescriptor whose supported devices (as defined 835 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 836 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 837 // where addresses are used to distinguish between one connected device and another. 838 void findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/, 839 const String8 address /*in*/, 840 SortedVector<audio_io_handle_t>& outputs /*out*/); 841 uint32_t nextUniqueId(); 842 uint32_t nextAudioPortGeneration(); 843 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 844 // internal method to return the output handle for the given device and format 845 audio_io_handle_t getOutputForDevice( 846 audio_devices_t device, 847 audio_stream_type_t stream, 848 uint32_t samplingRate, 849 audio_format_t format, 850 audio_channel_mask_t channelMask, 851 audio_output_flags_t flags, 852 const audio_offload_info_t *offloadInfo); 853 // internal function to derive a stream type value from audio attributes 854 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 855}; 856 857}; 858