AudioPolicyManager.h revision 4dc680607181e6a76f4e91a39366c4f5dfb7b03e
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 2 57// See AudioPort::compareFormats() 58#define WORST_MIXER_FORMAT AUDIO_FORMAT_PCM_16_BIT 59#define BEST_MIXER_FORMAT AUDIO_FORMAT_PCM_24_BIT_PACKED 60 61// ---------------------------------------------------------------------------- 62// AudioPolicyManager implements audio policy manager behavior common to all platforms. 63// ---------------------------------------------------------------------------- 64 65class AudioPolicyManager: public AudioPolicyInterface 66#ifdef AUDIO_POLICY_TEST 67 , public Thread 68#endif //AUDIO_POLICY_TEST 69{ 70 71public: 72 AudioPolicyManager(AudioPolicyClientInterface *clientInterface); 73 virtual ~AudioPolicyManager(); 74 75 // AudioPolicyInterface 76 virtual status_t setDeviceConnectionState(audio_devices_t device, 77 audio_policy_dev_state_t state, 78 const char *device_address); 79 virtual audio_policy_dev_state_t getDeviceConnectionState(audio_devices_t device, 80 const char *device_address); 81 virtual void setPhoneState(audio_mode_t state); 82 virtual void setForceUse(audio_policy_force_use_t usage, 83 audio_policy_forced_cfg_t config); 84 virtual audio_policy_forced_cfg_t getForceUse(audio_policy_force_use_t usage); 85 virtual void setSystemProperty(const char* property, const char* value); 86 virtual status_t initCheck(); 87 virtual audio_io_handle_t getOutput(audio_stream_type_t stream, 88 uint32_t samplingRate, 89 audio_format_t format, 90 audio_channel_mask_t channelMask, 91 audio_output_flags_t flags, 92 const audio_offload_info_t *offloadInfo); 93 virtual audio_io_handle_t getOutputForAttr(const audio_attributes_t *attr, 94 uint32_t samplingRate, 95 audio_format_t format, 96 audio_channel_mask_t channelMask, 97 audio_output_flags_t flags, 98 const audio_offload_info_t *offloadInfo); 99 virtual status_t startOutput(audio_io_handle_t output, 100 audio_stream_type_t stream, 101 int session = 0); 102 virtual status_t stopOutput(audio_io_handle_t output, 103 audio_stream_type_t stream, 104 int session = 0); 105 virtual void releaseOutput(audio_io_handle_t output); 106 virtual audio_io_handle_t getInput(audio_source_t inputSource, 107 uint32_t samplingRate, 108 audio_format_t format, 109 audio_channel_mask_t channelMask, 110 audio_session_t session, 111 audio_input_flags_t flags); 112 113 // indicates to the audio policy manager that the input starts being used. 114 virtual status_t startInput(audio_io_handle_t input, 115 audio_session_t session); 116 117 // indicates to the audio policy manager that the input stops being used. 118 virtual status_t stopInput(audio_io_handle_t input, 119 audio_session_t session); 120 virtual void releaseInput(audio_io_handle_t input, 121 audio_session_t session); 122 virtual void closeAllInputs(); 123 virtual void initStreamVolume(audio_stream_type_t stream, 124 int indexMin, 125 int indexMax); 126 virtual status_t setStreamVolumeIndex(audio_stream_type_t stream, 127 int index, 128 audio_devices_t device); 129 virtual status_t getStreamVolumeIndex(audio_stream_type_t stream, 130 int *index, 131 audio_devices_t device); 132 133 // return the strategy corresponding to a given stream type 134 virtual uint32_t getStrategyForStream(audio_stream_type_t stream); 135 // return the strategy corresponding to the given audio attributes 136 virtual uint32_t getStrategyForAttr(const audio_attributes_t *attr); 137 138 // return the enabled output devices for the given stream type 139 virtual audio_devices_t getDevicesForStream(audio_stream_type_t stream); 140 141 virtual audio_io_handle_t getOutputForEffect(const effect_descriptor_t *desc = NULL); 142 virtual status_t registerEffect(const effect_descriptor_t *desc, 143 audio_io_handle_t io, 144 uint32_t strategy, 145 int session, 146 int id); 147 virtual status_t unregisterEffect(int id); 148 virtual status_t setEffectEnabled(int id, bool enabled); 149 150 virtual bool isStreamActive(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 151 // return whether a stream is playing remotely, override to change the definition of 152 // local/remote playback, used for instance by notification manager to not make 153 // media players lose audio focus when not playing locally 154 virtual bool isStreamActiveRemotely(audio_stream_type_t stream, uint32_t inPastMs = 0) const; 155 virtual bool isSourceActive(audio_source_t source) const; 156 157 virtual status_t dump(int fd); 158 159 virtual bool isOffloadSupported(const audio_offload_info_t& offloadInfo); 160 161 virtual status_t listAudioPorts(audio_port_role_t role, 162 audio_port_type_t type, 163 unsigned int *num_ports, 164 struct audio_port *ports, 165 unsigned int *generation); 166 virtual status_t getAudioPort(struct audio_port *port); 167 virtual status_t createAudioPatch(const struct audio_patch *patch, 168 audio_patch_handle_t *handle, 169 uid_t uid); 170 virtual status_t releaseAudioPatch(audio_patch_handle_t handle, 171 uid_t uid); 172 virtual status_t listAudioPatches(unsigned int *num_patches, 173 struct audio_patch *patches, 174 unsigned int *generation); 175 virtual status_t setAudioPortConfig(const struct audio_port_config *config); 176 virtual void clearAudioPatches(uid_t uid); 177 178protected: 179 180 enum routing_strategy { 181 STRATEGY_MEDIA, 182 STRATEGY_PHONE, 183 STRATEGY_SONIFICATION, 184 STRATEGY_SONIFICATION_RESPECTFUL, 185 STRATEGY_DTMF, 186 STRATEGY_ENFORCED_AUDIBLE, 187 NUM_STRATEGIES 188 }; 189 190 // 4 points to define the volume attenuation curve, each characterized by the volume 191 // index (from 0 to 100) at which they apply, and the attenuation in dB at that index. 192 // we use 100 steps to avoid rounding errors when computing the volume in volIndexToAmpl() 193 194 enum { VOLMIN = 0, VOLKNEE1 = 1, VOLKNEE2 = 2, VOLMAX = 3, VOLCNT = 4}; 195 196 class VolumeCurvePoint 197 { 198 public: 199 int mIndex; 200 float mDBAttenuation; 201 }; 202 203 // device categories used for volume curve management. 204 enum device_category { 205 DEVICE_CATEGORY_HEADSET, 206 DEVICE_CATEGORY_SPEAKER, 207 DEVICE_CATEGORY_EARPIECE, 208 DEVICE_CATEGORY_CNT 209 }; 210 211 class HwModule; 212 213 class AudioGain: public RefBase 214 { 215 public: 216 AudioGain(int index, bool useInChannelMask); 217 virtual ~AudioGain() {} 218 219 void dump(int fd, int spaces, int index) const; 220 221 void getDefaultConfig(struct audio_gain_config *config); 222 status_t checkConfig(const struct audio_gain_config *config); 223 int mIndex; 224 struct audio_gain mGain; 225 bool mUseInChannelMask; 226 }; 227 228 class AudioPort: public virtual RefBase 229 { 230 public: 231 AudioPort(const String8& name, audio_port_type_t type, 232 audio_port_role_t role, const sp<HwModule>& module); 233 virtual ~AudioPort() {} 234 235 virtual void toAudioPort(struct audio_port *port) const; 236 237 void loadSamplingRates(char *name); 238 void loadFormats(char *name); 239 void loadOutChannels(char *name); 240 void loadInChannels(char *name); 241 242 audio_gain_mode_t loadGainMode(char *name); 243 void loadGain(cnode *root, int index); 244 void loadGains(cnode *root); 245 246 // searches for an exact match 247 status_t checkExactSamplingRate(uint32_t samplingRate) const; 248 // searches for a compatible match, and returns the best match via updatedSamplingRate 249 status_t checkCompatibleSamplingRate(uint32_t samplingRate, 250 uint32_t *updatedSamplingRate) const; 251 // searches for an exact match 252 status_t checkExactChannelMask(audio_channel_mask_t channelMask) const; 253 // searches for a compatible match, currently implemented for input channel masks only 254 status_t checkCompatibleChannelMask(audio_channel_mask_t channelMask) const; 255 status_t checkFormat(audio_format_t format) const; 256 status_t checkGain(const struct audio_gain_config *gainConfig, int index) const; 257 258 uint32_t pickSamplingRate() const; 259 audio_channel_mask_t pickChannelMask() const; 260 audio_format_t pickFormat() const; 261 262 static const audio_format_t sPcmFormatCompareTable[]; 263 static int compareFormats(audio_format_t format1, audio_format_t format2); 264 265 void dump(int fd, int spaces) const; 266 267 String8 mName; 268 audio_port_type_t mType; 269 audio_port_role_t mRole; 270 bool mUseInChannelMask; 271 // by convention, "0' in the first entry in mSamplingRates, mChannelMasks or mFormats 272 // indicates the supported parameters should be read from the output stream 273 // after it is opened for the first time 274 Vector <uint32_t> mSamplingRates; // supported sampling rates 275 Vector <audio_channel_mask_t> mChannelMasks; // supported channel masks 276 Vector <audio_format_t> mFormats; // supported audio formats 277 Vector < sp<AudioGain> > mGains; // gain controllers 278 sp<HwModule> mModule; // audio HW module exposing this I/O stream 279 audio_output_flags_t mFlags; // attribute flags (e.g primary output, 280 // direct output...). For outputs only. 281 }; 282 283 class AudioPortConfig: public virtual RefBase 284 { 285 public: 286 AudioPortConfig(); 287 virtual ~AudioPortConfig() {} 288 289 status_t applyAudioPortConfig(const struct audio_port_config *config, 290 struct audio_port_config *backupConfig = NULL); 291 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 292 const struct audio_port_config *srcConfig = NULL) const = 0; 293 sp<AudioPort> mAudioPort; 294 uint32_t mSamplingRate; 295 audio_format_t mFormat; 296 audio_channel_mask_t mChannelMask; 297 struct audio_gain_config mGain; 298 }; 299 300 301 class AudioPatch: public RefBase 302 { 303 public: 304 AudioPatch(audio_patch_handle_t handle, 305 const struct audio_patch *patch, uid_t uid) : 306 mHandle(handle), mPatch(*patch), mUid(uid), mAfPatchHandle(0) {} 307 308 audio_patch_handle_t mHandle; 309 struct audio_patch mPatch; 310 uid_t mUid; 311 audio_patch_handle_t mAfPatchHandle; 312 }; 313 314 class DeviceDescriptor: public AudioPort, public AudioPortConfig 315 { 316 public: 317 DeviceDescriptor(const String8& name, audio_devices_t type); 318 319 virtual ~DeviceDescriptor() {} 320 321 bool equals(const sp<DeviceDescriptor>& other) const; 322 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 323 const struct audio_port_config *srcConfig = NULL) const; 324 325 virtual void toAudioPort(struct audio_port *port) const; 326 327 status_t dump(int fd, int spaces, int index) const; 328 329 audio_devices_t mDeviceType; 330 String8 mAddress; 331 audio_port_handle_t mId; 332 }; 333 334 class DeviceVector : public SortedVector< sp<DeviceDescriptor> > 335 { 336 public: 337 DeviceVector() : SortedVector(), mDeviceTypes(AUDIO_DEVICE_NONE) {} 338 339 ssize_t add(const sp<DeviceDescriptor>& item); 340 ssize_t remove(const sp<DeviceDescriptor>& item); 341 ssize_t indexOf(const sp<DeviceDescriptor>& item) const; 342 343 audio_devices_t types() const { return mDeviceTypes; } 344 345 void loadDevicesFromType(audio_devices_t types); 346 void loadDevicesFromName(char *name, const DeviceVector& declaredDevices); 347 348 sp<DeviceDescriptor> getDevice(audio_devices_t type, String8 address) const; 349 DeviceVector getDevicesFromType(audio_devices_t types) const; 350 sp<DeviceDescriptor> getDeviceFromId(audio_port_handle_t id) const; 351 sp<DeviceDescriptor> getDeviceFromName(const String8& name) const; 352 DeviceVector getDevicesFromTypeAddr(audio_devices_t type, String8 address) 353 const; 354 355 private: 356 void refreshTypes(); 357 audio_devices_t mDeviceTypes; 358 }; 359 360 // the IOProfile class describes the capabilities of an output or input stream. 361 // It is currently assumed that all combination of listed parameters are supported. 362 // It is used by the policy manager to determine if an output or input is suitable for 363 // a given use case, open/close it accordingly and connect/disconnect audio tracks 364 // to/from it. 365 class IOProfile : public AudioPort 366 { 367 public: 368 IOProfile(const String8& name, audio_port_role_t role, const sp<HwModule>& module); 369 virtual ~IOProfile(); 370 371 // This method is used for both output and input. 372 // If parameter updatedSamplingRate is non-NULL, it is assigned the actual sample rate. 373 // For input, flags is interpreted as audio_input_flags_t. 374 // TODO: merge audio_output_flags_t and audio_input_flags_t. 375 bool isCompatibleProfile(audio_devices_t device, 376 uint32_t samplingRate, 377 uint32_t *updatedSamplingRate, 378 audio_format_t format, 379 audio_channel_mask_t channelMask, 380 audio_output_flags_t flags) const; 381 382 void dump(int fd); 383 void log(); 384 385 DeviceVector mSupportedDevices; // supported devices 386 // (devices this output can be routed to) 387 }; 388 389 class HwModule : public RefBase 390 { 391 public: 392 HwModule(const char *name); 393 ~HwModule(); 394 395 status_t loadOutput(cnode *root); 396 status_t loadInput(cnode *root); 397 status_t loadDevice(cnode *root); 398 399 void dump(int fd); 400 401 const char *const mName; // base name of the audio HW module (primary, a2dp ...) 402 uint32_t mHalVersion; // audio HAL API version 403 audio_module_handle_t mHandle; 404 Vector < sp<IOProfile> > mOutputProfiles; // output profiles exposed by this module 405 Vector < sp<IOProfile> > mInputProfiles; // input profiles exposed by this module 406 DeviceVector mDeclaredDevices; // devices declared in audio_policy.conf 407 408 }; 409 410 // default volume curve 411 static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManager::VOLCNT]; 412 // default volume curve for media strategy 413 static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 414 // volume curve for media strategy on speakers 415 static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 416 static const VolumeCurvePoint sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 417 // volume curve for sonification strategy on speakers 418 static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT]; 419 static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 420 static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 421 static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 422 static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 423 static const VolumeCurvePoint sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 424 static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 425 // default volume curves per stream and device category. See initializeVolumeCurves() 426 static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][DEVICE_CATEGORY_CNT]; 427 428 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output 429 // and keep track of the usage of this output by each audio stream type. 430 class AudioOutputDescriptor: public AudioPortConfig 431 { 432 public: 433 AudioOutputDescriptor(const sp<IOProfile>& profile); 434 435 status_t dump(int fd); 436 437 audio_devices_t device() const; 438 void changeRefCount(audio_stream_type_t stream, int delta); 439 440 bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); } 441 audio_devices_t supportedDevices(); 442 uint32_t latency(); 443 bool sharesHwModuleWith(const sp<AudioOutputDescriptor> outputDesc); 444 bool isActive(uint32_t inPastMs = 0) const; 445 bool isStreamActive(audio_stream_type_t stream, 446 uint32_t inPastMs = 0, 447 nsecs_t sysTime = 0) const; 448 bool isStrategyActive(routing_strategy strategy, 449 uint32_t inPastMs = 0, 450 nsecs_t sysTime = 0) const; 451 452 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 453 const struct audio_port_config *srcConfig = NULL) const; 454 void toAudioPort(struct audio_port *port) const; 455 456 audio_port_handle_t mId; 457 audio_io_handle_t mIoHandle; // output handle 458 uint32_t mLatency; // 459 audio_output_flags_t mFlags; // 460 audio_devices_t mDevice; // current device this output is routed to 461 audio_patch_handle_t mPatchHandle; 462 uint32_t mRefCount[AUDIO_STREAM_CNT]; // number of streams of each type using this output 463 nsecs_t mStopTime[AUDIO_STREAM_CNT]; 464 sp<AudioOutputDescriptor> mOutput1; // used by duplicated outputs: first output 465 sp<AudioOutputDescriptor> mOutput2; // used by duplicated outputs: second output 466 float mCurVolume[AUDIO_STREAM_CNT]; // current stream volume 467 int mMuteCount[AUDIO_STREAM_CNT]; // mute request counter 468 const sp<IOProfile> mProfile; // I/O profile this output derives from 469 bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible 470 // device selection. See checkDeviceMuteStrategies() 471 uint32_t mDirectOpenCount; // number of clients using this output (direct outputs only) 472 }; 473 474 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 475 // and keep track of the usage of this input. 476 class AudioInputDescriptor: public AudioPortConfig 477 { 478 public: 479 AudioInputDescriptor(const sp<IOProfile>& profile); 480 481 status_t dump(int fd); 482 483 audio_port_handle_t mId; 484 audio_io_handle_t mIoHandle; // input handle 485 audio_devices_t mDevice; // current device this input is routed to 486 audio_patch_handle_t mPatchHandle; 487 uint32_t mRefCount; // number of AudioRecord clients using this output 488 uint32_t mOpenRefCount; 489 audio_source_t mInputSource; // input source selected by application (mediarecorder.h) 490 const sp<IOProfile> mProfile; // I/O profile this output derives from 491 SortedVector<audio_session_t> mSessions; // audio sessions attached to this input 492 493 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 494 const struct audio_port_config *srcConfig = NULL) const; 495 void toAudioPort(struct audio_port *port) const; 496 }; 497 498 // stream descriptor used for volume control 499 class StreamDescriptor 500 { 501 public: 502 StreamDescriptor(); 503 504 int getVolumeIndex(audio_devices_t device); 505 void dump(int fd); 506 507 int mIndexMin; // min volume index 508 int mIndexMax; // max volume index 509 KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device 510 bool mCanBeMuted; // true is the stream can be muted 511 512 const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT]; 513 }; 514 515 // stream descriptor used for volume control 516 class EffectDescriptor : public RefBase 517 { 518 public: 519 520 status_t dump(int fd); 521 522 int mIo; // io the effect is attached to 523 routing_strategy mStrategy; // routing strategy the effect is associated to 524 int mSession; // audio session the effect is on 525 effect_descriptor_t mDesc; // effect descriptor 526 bool mEnabled; // enabled state: CPU load being used or not 527 }; 528 529 void addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc); 530 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 531 532 // return the strategy corresponding to a given stream type 533 static routing_strategy getStrategy(audio_stream_type_t stream); 534 535 // return appropriate device for streams handled by the specified strategy according to current 536 // phone state, connected devices... 537 // if fromCache is true, the device is returned from mDeviceForStrategy[], 538 // otherwise it is determine by current state 539 // (device connected,phone state, force use, a2dp output...) 540 // This allows to: 541 // 1 speed up process when the state is stable (when starting or stopping an output) 542 // 2 access to either current device selection (fromCache == true) or 543 // "future" device selection (fromCache == false) when called from a context 544 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 545 // before updateDevicesAndOutputs() is called. 546 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 547 bool fromCache); 548 549 // change the route of the specified output. Returns the number of ms we have slept to 550 // allow new routing to take effect in certain cases. 551 uint32_t setOutputDevice(audio_io_handle_t output, 552 audio_devices_t device, 553 bool force = false, 554 int delayMs = 0, 555 audio_patch_handle_t *patchHandle = NULL, 556 const char* address = NULL); 557 status_t resetOutputDevice(audio_io_handle_t output, 558 int delayMs = 0, 559 audio_patch_handle_t *patchHandle = NULL); 560 status_t setInputDevice(audio_io_handle_t input, 561 audio_devices_t device, 562 bool force = false, 563 audio_patch_handle_t *patchHandle = NULL); 564 status_t resetInputDevice(audio_io_handle_t input, 565 audio_patch_handle_t *patchHandle = NULL); 566 567 // select input device corresponding to requested audio source 568 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 569 570 // return io handle of active input or 0 if no input is active 571 // Only considers inputs from physical devices (e.g. main mic, headset mic) when 572 // ignoreVirtualInputs is true. 573 audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true); 574 575 // initialize volume curves for each strategy and device category 576 void initializeVolumeCurves(); 577 578 // compute the actual volume for a given stream according to the requested index and a particular 579 // device 580 virtual float computeVolume(audio_stream_type_t stream, int index, 581 audio_io_handle_t output, audio_devices_t device); 582 583 // check that volume change is permitted, compute and send new volume to audio hardware 584 status_t checkAndSetVolume(audio_stream_type_t stream, int index, audio_io_handle_t output, 585 audio_devices_t device, int delayMs = 0, bool force = false); 586 587 // apply all stream volumes to the specified output and device 588 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 589 590 // Mute or unmute all streams handled by the specified strategy on the specified output 591 void setStrategyMute(routing_strategy strategy, 592 bool on, 593 audio_io_handle_t output, 594 int delayMs = 0, 595 audio_devices_t device = (audio_devices_t)0); 596 597 // Mute or unmute the stream on the specified output 598 void setStreamMute(audio_stream_type_t stream, 599 bool on, 600 audio_io_handle_t output, 601 int delayMs = 0, 602 audio_devices_t device = (audio_devices_t)0); 603 604 // handle special cases for sonification strategy while in call: mute streams or replace by 605 // a special tone in the device used for communication 606 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 607 608 // true if device is in a telephony or VoIP call 609 virtual bool isInCall(); 610 611 // true if given state represents a device in a telephony or VoIP call 612 virtual bool isStateInCall(int state); 613 614 // when a device is connected, checks if an open output can be routed 615 // to this device. If none is open, tries to open one of the available outputs. 616 // Returns an output suitable to this device or 0. 617 // when a device is disconnected, checks if an output is not used any more and 618 // returns its handle if any. 619 // transfers the audio tracks and effects from one output thread to another accordingly. 620 status_t checkOutputsForDevice(audio_devices_t device, 621 audio_policy_dev_state_t state, 622 SortedVector<audio_io_handle_t>& outputs, 623 const String8 address); 624 625 status_t checkInputsForDevice(audio_devices_t device, 626 audio_policy_dev_state_t state, 627 SortedVector<audio_io_handle_t>& inputs, 628 const String8 address); 629 630 // close an output and its companion duplicating output. 631 void closeOutput(audio_io_handle_t output); 632 633 // checks and if necessary changes outputs used for all strategies. 634 // must be called every time a condition that affects the output choice for a given strategy 635 // changes: connected device, phone state, force use... 636 // Must be called before updateDevicesAndOutputs() 637 void checkOutputForStrategy(routing_strategy strategy); 638 639 // Same as checkOutputForStrategy() but for a all strategies in order of priority 640 void checkOutputForAllStrategies(); 641 642 // manages A2DP output suspend/restore according to phone state and BT SCO usage 643 void checkA2dpSuspend(); 644 645 // returns the A2DP output handle if it is open or 0 otherwise 646 audio_io_handle_t getA2dpOutput(); 647 648 // selects the most appropriate device on output for current state 649 // must be called every time a condition that affects the device choice for a given output is 650 // changed: connected device, phone state, force use, output start, output stop.. 651 // see getDeviceForStrategy() for the use of fromCache parameter 652 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 653 654 // updates cache of device used by all strategies (mDeviceForStrategy[]) 655 // must be called every time a condition that affects the device choice for a given strategy is 656 // changed: connected device, phone state, force use... 657 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 658 // Must be called after checkOutputForAllStrategies() 659 void updateDevicesAndOutputs(); 660 661 // selects the most appropriate device on input for current state 662 audio_devices_t getNewInputDevice(audio_io_handle_t input); 663 664 virtual uint32_t getMaxEffectsCpuLoad(); 665 virtual uint32_t getMaxEffectsMemory(); 666#ifdef AUDIO_POLICY_TEST 667 virtual bool threadLoop(); 668 void exit(); 669 int testOutputIndex(audio_io_handle_t output); 670#endif //AUDIO_POLICY_TEST 671 672 status_t setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled); 673 674 // returns the category the device belongs to with regard to volume curve management 675 static device_category getDeviceCategory(audio_devices_t device); 676 677 // extract one device relevant for volume control from multiple device selection 678 static audio_devices_t getDeviceForVolume(audio_devices_t device); 679 680 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 681 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs); 682 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 683 SortedVector<audio_io_handle_t>& outputs2); 684 685 // mute/unmute strategies using an incompatible device combination 686 // if muting, wait for the audio in pcm buffer to be drained before proceeding 687 // if unmuting, unmute only after the specified delay 688 // Returns the number of ms waited 689 uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 690 audio_devices_t prevDevice, 691 uint32_t delayMs); 692 693 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 694 audio_output_flags_t flags); 695 // samplingRate parameter is an in/out and so may be modified 696 sp<IOProfile> getInputProfile(audio_devices_t device, 697 uint32_t& samplingRate, 698 audio_format_t format, 699 audio_channel_mask_t channelMask, 700 audio_input_flags_t flags); 701 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 702 uint32_t samplingRate, 703 audio_format_t format, 704 audio_channel_mask_t channelMask, 705 audio_output_flags_t flags); 706 707 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 708 709 bool isNonOffloadableEffectEnabled(); 710 711 status_t addAudioPatch(audio_patch_handle_t handle, 712 const sp<AudioPatch>& patch); 713 status_t removeAudioPatch(audio_patch_handle_t handle); 714 715 sp<AudioOutputDescriptor> getOutputFromId(audio_port_handle_t id) const; 716 sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const; 717 sp<HwModule> getModuleForDevice(audio_devices_t device) const; 718 sp<HwModule> getModuleFromName(const char *name) const; 719 // 720 // Audio policy configuration file parsing (audio_policy.conf) 721 // 722 static uint32_t stringToEnum(const struct StringToEnum *table, 723 size_t size, 724 const char *name); 725 static const char *enumToString(const struct StringToEnum *table, 726 size_t size, 727 uint32_t value); 728 static bool stringToBool(const char *value); 729 static audio_output_flags_t parseFlagNames(char *name); 730 static audio_devices_t parseDeviceNames(char *name); 731 void loadHwModule(cnode *root); 732 void loadHwModules(cnode *root); 733 void loadGlobalConfig(cnode *root, const sp<HwModule>& module); 734 status_t loadAudioPolicyConfig(const char *path); 735 void defaultAudioPolicyConfig(void); 736 737 738 uid_t mUidCached; 739 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 740 audio_io_handle_t mPrimaryOutput; // primary output handle 741 // list of descriptors for outputs currently opened 742 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mOutputs; 743 // copy of mOutputs before setDeviceConnectionState() opens new outputs 744 // reset to mOutputs when updateDevicesAndOutputs() is called. 745 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mPreviousOutputs; 746 DefaultKeyedVector<audio_io_handle_t, sp<AudioInputDescriptor> > mInputs; // list of input descriptors 747 DeviceVector mAvailableOutputDevices; // all available output devices 748 DeviceVector mAvailableInputDevices; // all available input devices 749 int mPhoneState; // current phone state 750 audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT]; // current forced use configuration 751 752 StreamDescriptor mStreams[AUDIO_STREAM_CNT]; // stream descriptors for volume control 753 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 754 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 755 float mLastVoiceVolume; // last voice volume value sent to audio HAL 756 757 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 758 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 759 // Maximum memory allocated to audio effects in KB 760 static const uint32_t MAX_EFFECTS_MEMORY = 512; 761 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 762 uint32_t mTotalEffectsMemory; // current memory used by effects 763 KeyedVector<int, sp<EffectDescriptor> > mEffects; // list of registered audio effects 764 bool mA2dpSuspended; // true if A2DP output is suspended 765 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 766 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 767 // to boost soft sounds, used to adjust volume curves accordingly 768 769 Vector < sp<HwModule> > mHwModules; 770 volatile int32_t mNextUniqueId; 771 volatile int32_t mAudioPortGeneration; 772 773 DefaultKeyedVector<audio_patch_handle_t, sp<AudioPatch> > mAudioPatches; 774 775#ifdef AUDIO_POLICY_TEST 776 Mutex mLock; 777 Condition mWaitWorkCV; 778 779 int mCurOutput; 780 bool mDirectOutput; 781 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 782 int mTestInput; 783 uint32_t mTestDevice; 784 uint32_t mTestSamplingRate; 785 uint32_t mTestFormat; 786 uint32_t mTestChannels; 787 uint32_t mTestLatencyMs; 788#endif //AUDIO_POLICY_TEST 789 790private: 791 static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, 792 int indexInUi); 793 // updates device caching and output for streams that can influence the 794 // routing of notifications 795 void handleNotificationRoutingForStream(audio_stream_type_t stream); 796 static bool isVirtualInputDevice(audio_devices_t device); 797 static bool deviceDistinguishesOnAddress(audio_devices_t device); 798 // find the outputs on a given output descriptor that have the given address. 799 // to be called on an AudioOutputDescriptor whose supported devices (as defined 800 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 801 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 802 // where addresses are used to distinguish between one connected device and another. 803 void findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/, 804 const String8 address /*in*/, 805 SortedVector<audio_io_handle_t>& outputs /*out*/); 806 uint32_t nextUniqueId(); 807 uint32_t nextAudioPortGeneration(); 808 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 809 // internal method to return the output handle for the given device and format 810 audio_io_handle_t getOutputForDevice( 811 audio_devices_t device, 812 audio_stream_type_t stream, 813 uint32_t samplingRate, 814 audio_format_t format, 815 audio_channel_mask_t channelMask, 816 audio_output_flags_t flags, 817 const audio_offload_info_t *offloadInfo); 818 // internal function to derive a stream type value from audio attributes 819 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 820}; 821 822}; 823