AudioPolicyManager.h revision 0fb47759256ecdaedbc34c880238bc9d102ef160
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_in_acoustics_t acoustics, 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); 115 116 // indicates to the audio policy manager that the input stops being used. 117 virtual status_t stopInput(audio_io_handle_t input); 118 virtual void releaseInput(audio_io_handle_t input); 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 175protected: 176 177 enum routing_strategy { 178 STRATEGY_MEDIA, 179 STRATEGY_PHONE, 180 STRATEGY_SONIFICATION, 181 STRATEGY_SONIFICATION_RESPECTFUL, 182 STRATEGY_DTMF, 183 STRATEGY_ENFORCED_AUDIBLE, 184 NUM_STRATEGIES 185 }; 186 187 // 4 points to define the volume attenuation curve, each characterized by the volume 188 // index (from 0 to 100) at which they apply, and the attenuation in dB at that index. 189 // we use 100 steps to avoid rounding errors when computing the volume in volIndexToAmpl() 190 191 enum { VOLMIN = 0, VOLKNEE1 = 1, VOLKNEE2 = 2, VOLMAX = 3, VOLCNT = 4}; 192 193 class VolumeCurvePoint 194 { 195 public: 196 int mIndex; 197 float mDBAttenuation; 198 }; 199 200 // device categories used for volume curve management. 201 enum device_category { 202 DEVICE_CATEGORY_HEADSET, 203 DEVICE_CATEGORY_SPEAKER, 204 DEVICE_CATEGORY_EARPIECE, 205 DEVICE_CATEGORY_CNT 206 }; 207 208 class HwModule; 209 210 class AudioGain: public RefBase 211 { 212 public: 213 AudioGain(int index, bool useInChannelMask); 214 virtual ~AudioGain() {} 215 216 void dump(int fd, int spaces, int index) const; 217 218 void getDefaultConfig(struct audio_gain_config *config); 219 status_t checkConfig(const struct audio_gain_config *config); 220 int mIndex; 221 struct audio_gain mGain; 222 bool mUseInChannelMask; 223 }; 224 225 class AudioPort: public virtual RefBase 226 { 227 public: 228 AudioPort(const String8& name, audio_port_type_t type, 229 audio_port_role_t role, const sp<HwModule>& module); 230 virtual ~AudioPort() {} 231 232 virtual void toAudioPort(struct audio_port *port) const; 233 234 void loadSamplingRates(char *name); 235 void loadFormats(char *name); 236 void loadOutChannels(char *name); 237 void loadInChannels(char *name); 238 239 audio_gain_mode_t loadGainMode(char *name); 240 void loadGain(cnode *root, int index); 241 void loadGains(cnode *root); 242 243 status_t checkSamplingRate(uint32_t samplingRate) const; 244 status_t checkChannelMask(audio_channel_mask_t channelMask) const; 245 status_t checkFormat(audio_format_t format) const; 246 status_t checkGain(const struct audio_gain_config *gainConfig, int index) const; 247 248 uint32_t pickSamplingRate() const; 249 audio_channel_mask_t pickChannelMask() const; 250 audio_format_t pickFormat() const; 251 252 static const audio_format_t sPcmFormatCompareTable[]; 253 static int compareFormats(audio_format_t format1, audio_format_t format2); 254 255 void dump(int fd, int spaces) const; 256 257 String8 mName; 258 audio_port_type_t mType; 259 audio_port_role_t mRole; 260 bool mUseInChannelMask; 261 // by convention, "0' in the first entry in mSamplingRates, mChannelMasks or mFormats 262 // indicates the supported parameters should be read from the output stream 263 // after it is opened for the first time 264 Vector <uint32_t> mSamplingRates; // supported sampling rates 265 Vector <audio_channel_mask_t> mChannelMasks; // supported channel masks 266 Vector <audio_format_t> mFormats; // supported audio formats 267 Vector < sp<AudioGain> > mGains; // gain controllers 268 sp<HwModule> mModule; // audio HW module exposing this I/O stream 269 audio_output_flags_t mFlags; // attribute flags (e.g primary output, 270 // direct output...). For outputs only. 271 }; 272 273 class AudioPortConfig: public virtual RefBase 274 { 275 public: 276 AudioPortConfig(); 277 virtual ~AudioPortConfig() {} 278 279 status_t applyAudioPortConfig(const struct audio_port_config *config, 280 struct audio_port_config *backupConfig = NULL); 281 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 282 const struct audio_port_config *srcConfig = NULL) const = 0; 283 sp<AudioPort> mAudioPort; 284 uint32_t mSamplingRate; 285 audio_format_t mFormat; 286 audio_channel_mask_t mChannelMask; 287 struct audio_gain_config mGain; 288 }; 289 290 291 class AudioPatch: public RefBase 292 { 293 public: 294 AudioPatch(audio_patch_handle_t handle, 295 const struct audio_patch *patch, uid_t uid) : 296 mHandle(handle), mPatch(*patch), mUid(uid), mAfPatchHandle(0) {} 297 298 audio_patch_handle_t mHandle; 299 struct audio_patch mPatch; 300 uid_t mUid; 301 audio_patch_handle_t mAfPatchHandle; 302 }; 303 304 class DeviceDescriptor: public AudioPort, public AudioPortConfig 305 { 306 public: 307 DeviceDescriptor(const String8& name, audio_devices_t type); 308 309 virtual ~DeviceDescriptor() {} 310 311 bool equals(const sp<DeviceDescriptor>& other) const; 312 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 313 const struct audio_port_config *srcConfig = NULL) const; 314 315 virtual void toAudioPort(struct audio_port *port) const; 316 317 status_t dump(int fd, int spaces, int index) const; 318 319 audio_devices_t mDeviceType; 320 String8 mAddress; 321 audio_port_handle_t mId; 322 }; 323 324 class DeviceVector : public SortedVector< sp<DeviceDescriptor> > 325 { 326 public: 327 DeviceVector() : SortedVector(), mDeviceTypes(AUDIO_DEVICE_NONE) {} 328 329 ssize_t add(const sp<DeviceDescriptor>& item); 330 ssize_t remove(const sp<DeviceDescriptor>& item); 331 ssize_t indexOf(const sp<DeviceDescriptor>& item) const; 332 333 audio_devices_t types() const { return mDeviceTypes; } 334 335 void loadDevicesFromType(audio_devices_t types); 336 void loadDevicesFromName(char *name, const DeviceVector& declaredDevices); 337 338 sp<DeviceDescriptor> getDevice(audio_devices_t type, String8 address) const; 339 DeviceVector getDevicesFromType(audio_devices_t types) const; 340 sp<DeviceDescriptor> getDeviceFromId(audio_port_handle_t id) const; 341 sp<DeviceDescriptor> getDeviceFromName(const String8& name) const; 342 DeviceVector getDevicesFromTypeAddr(audio_devices_t type, String8 address) 343 const; 344 345 private: 346 void refreshTypes(); 347 audio_devices_t mDeviceTypes; 348 }; 349 350 // the IOProfile class describes the capabilities of an output or input stream. 351 // It is currently assumed that all combination of listed parameters are supported. 352 // It is used by the policy manager to determine if an output or input is suitable for 353 // a given use case, open/close it accordingly and connect/disconnect audio tracks 354 // to/from it. 355 class IOProfile : public AudioPort 356 { 357 public: 358 IOProfile(const String8& name, audio_port_role_t role, const sp<HwModule>& module); 359 virtual ~IOProfile(); 360 361 bool isCompatibleProfile(audio_devices_t device, 362 uint32_t samplingRate, 363 audio_format_t format, 364 audio_channel_mask_t channelMask, 365 audio_output_flags_t flags) const; 366 367 void dump(int fd); 368 void log(); 369 370 DeviceVector mSupportedDevices; // supported devices 371 // (devices this output can be routed to) 372 }; 373 374 class HwModule : public RefBase 375 { 376 public: 377 HwModule(const char *name); 378 ~HwModule(); 379 380 status_t loadOutput(cnode *root); 381 status_t loadInput(cnode *root); 382 status_t loadDevice(cnode *root); 383 384 void dump(int fd); 385 386 const char *const mName; // base name of the audio HW module (primary, a2dp ...) 387 uint32_t mHalVersion; // audio HAL API version 388 audio_module_handle_t mHandle; 389 Vector < sp<IOProfile> > mOutputProfiles; // output profiles exposed by this module 390 Vector < sp<IOProfile> > mInputProfiles; // input profiles exposed by this module 391 DeviceVector mDeclaredDevices; // devices declared in audio_policy.conf 392 393 }; 394 395 // default volume curve 396 static const VolumeCurvePoint sDefaultVolumeCurve[AudioPolicyManager::VOLCNT]; 397 // default volume curve for media strategy 398 static const VolumeCurvePoint sDefaultMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 399 // volume curve for media strategy on speakers 400 static const VolumeCurvePoint sSpeakerMediaVolumeCurve[AudioPolicyManager::VOLCNT]; 401 static const VolumeCurvePoint sSpeakerMediaVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 402 // volume curve for sonification strategy on speakers 403 static const VolumeCurvePoint sSpeakerSonificationVolumeCurve[AudioPolicyManager::VOLCNT]; 404 static const VolumeCurvePoint sSpeakerSonificationVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 405 static const VolumeCurvePoint sDefaultSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 406 static const VolumeCurvePoint sDefaultSystemVolumeCurveDrc[AudioPolicyManager::VOLCNT]; 407 static const VolumeCurvePoint sHeadsetSystemVolumeCurve[AudioPolicyManager::VOLCNT]; 408 static const VolumeCurvePoint sDefaultVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 409 static const VolumeCurvePoint sSpeakerVoiceVolumeCurve[AudioPolicyManager::VOLCNT]; 410 // default volume curves per stream and device category. See initializeVolumeCurves() 411 static const VolumeCurvePoint *sVolumeProfiles[AUDIO_STREAM_CNT][DEVICE_CATEGORY_CNT]; 412 413 // descriptor for audio outputs. Used to maintain current configuration of each opened audio output 414 // and keep track of the usage of this output by each audio stream type. 415 class AudioOutputDescriptor: public AudioPortConfig 416 { 417 public: 418 AudioOutputDescriptor(const sp<IOProfile>& profile); 419 420 status_t dump(int fd); 421 422 audio_devices_t device() const; 423 void changeRefCount(audio_stream_type_t stream, int delta); 424 425 bool isDuplicated() const { return (mOutput1 != NULL && mOutput2 != NULL); } 426 audio_devices_t supportedDevices(); 427 uint32_t latency(); 428 bool sharesHwModuleWith(const sp<AudioOutputDescriptor> outputDesc); 429 bool isActive(uint32_t inPastMs = 0) const; 430 bool isStreamActive(audio_stream_type_t stream, 431 uint32_t inPastMs = 0, 432 nsecs_t sysTime = 0) const; 433 bool isStrategyActive(routing_strategy strategy, 434 uint32_t inPastMs = 0, 435 nsecs_t sysTime = 0) const; 436 437 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 438 const struct audio_port_config *srcConfig = NULL) const; 439 void toAudioPort(struct audio_port *port) const; 440 441 audio_port_handle_t mId; 442 audio_io_handle_t mIoHandle; // output handle 443 uint32_t mLatency; // 444 audio_output_flags_t mFlags; // 445 audio_devices_t mDevice; // current device this output is routed to 446 audio_patch_handle_t mPatchHandle; 447 uint32_t mRefCount[AUDIO_STREAM_CNT]; // number of streams of each type using this output 448 nsecs_t mStopTime[AUDIO_STREAM_CNT]; 449 sp<AudioOutputDescriptor> mOutput1; // used by duplicated outputs: first output 450 sp<AudioOutputDescriptor> mOutput2; // used by duplicated outputs: second output 451 float mCurVolume[AUDIO_STREAM_CNT]; // current stream volume 452 int mMuteCount[AUDIO_STREAM_CNT]; // mute request counter 453 const sp<IOProfile> mProfile; // I/O profile this output derives from 454 bool mStrategyMutedByDevice[NUM_STRATEGIES]; // strategies muted because of incompatible 455 // device selection. See checkDeviceMuteStrategies() 456 uint32_t mDirectOpenCount; // number of clients using this output (direct outputs only) 457 }; 458 459 // descriptor for audio inputs. Used to maintain current configuration of each opened audio input 460 // and keep track of the usage of this input. 461 class AudioInputDescriptor: public AudioPortConfig 462 { 463 public: 464 AudioInputDescriptor(const sp<IOProfile>& profile); 465 466 status_t dump(int fd); 467 468 audio_port_handle_t mId; 469 audio_io_handle_t mIoHandle; // input handle 470 audio_devices_t mDevice; // current device this input is routed to 471 audio_patch_handle_t mPatchHandle; 472 uint32_t mRefCount; // number of AudioRecord clients using this output 473 uint32_t mOpenRefCount; 474 audio_source_t mInputSource; // input source selected by application (mediarecorder.h) 475 const sp<IOProfile> mProfile; // I/O profile this output derives from 476 477 virtual void toAudioPortConfig(struct audio_port_config *dstConfig, 478 const struct audio_port_config *srcConfig = NULL) const; 479 void toAudioPort(struct audio_port *port) const; 480 }; 481 482 // stream descriptor used for volume control 483 class StreamDescriptor 484 { 485 public: 486 StreamDescriptor(); 487 488 int getVolumeIndex(audio_devices_t device); 489 void dump(int fd); 490 491 int mIndexMin; // min volume index 492 int mIndexMax; // max volume index 493 KeyedVector<audio_devices_t, int> mIndexCur; // current volume index per device 494 bool mCanBeMuted; // true is the stream can be muted 495 496 const VolumeCurvePoint *mVolumeCurve[DEVICE_CATEGORY_CNT]; 497 }; 498 499 // stream descriptor used for volume control 500 class EffectDescriptor : public RefBase 501 { 502 public: 503 504 status_t dump(int fd); 505 506 int mIo; // io the effect is attached to 507 routing_strategy mStrategy; // routing strategy the effect is associated to 508 int mSession; // audio session the effect is on 509 effect_descriptor_t mDesc; // effect descriptor 510 bool mEnabled; // enabled state: CPU load being used or not 511 }; 512 513 void addOutput(audio_io_handle_t output, sp<AudioOutputDescriptor> outputDesc); 514 void addInput(audio_io_handle_t input, sp<AudioInputDescriptor> inputDesc); 515 516 // return the strategy corresponding to a given stream type 517 static routing_strategy getStrategy(audio_stream_type_t stream); 518 519 // return appropriate device for streams handled by the specified strategy according to current 520 // phone state, connected devices... 521 // if fromCache is true, the device is returned from mDeviceForStrategy[], 522 // otherwise it is determine by current state 523 // (device connected,phone state, force use, a2dp output...) 524 // This allows to: 525 // 1 speed up process when the state is stable (when starting or stopping an output) 526 // 2 access to either current device selection (fromCache == true) or 527 // "future" device selection (fromCache == false) when called from a context 528 // where conditions are changing (setDeviceConnectionState(), setPhoneState()...) AND 529 // before updateDevicesAndOutputs() is called. 530 virtual audio_devices_t getDeviceForStrategy(routing_strategy strategy, 531 bool fromCache); 532 533 // change the route of the specified output. Returns the number of ms we have slept to 534 // allow new routing to take effect in certain cases. 535 uint32_t setOutputDevice(audio_io_handle_t output, 536 audio_devices_t device, 537 bool force = false, 538 int delayMs = 0, 539 audio_patch_handle_t *patchHandle = NULL, 540 const char* address = NULL); 541 status_t resetOutputDevice(audio_io_handle_t output, 542 int delayMs = 0, 543 audio_patch_handle_t *patchHandle = NULL); 544 status_t setInputDevice(audio_io_handle_t input, 545 audio_devices_t device, 546 bool force = false, 547 audio_patch_handle_t *patchHandle = NULL); 548 status_t resetInputDevice(audio_io_handle_t input, 549 audio_patch_handle_t *patchHandle = NULL); 550 551 // select input device corresponding to requested audio source 552 virtual audio_devices_t getDeviceForInputSource(audio_source_t inputSource); 553 554 // return io handle of active input or 0 if no input is active 555 // Only considers inputs from physical devices (e.g. main mic, headset mic) when 556 // ignoreVirtualInputs is true. 557 audio_io_handle_t getActiveInput(bool ignoreVirtualInputs = true); 558 559 // initialize volume curves for each strategy and device category 560 void initializeVolumeCurves(); 561 562 // compute the actual volume for a given stream according to the requested index and a particular 563 // device 564 virtual float computeVolume(audio_stream_type_t stream, int index, 565 audio_io_handle_t output, audio_devices_t device); 566 567 // check that volume change is permitted, compute and send new volume to audio hardware 568 status_t checkAndSetVolume(audio_stream_type_t stream, int index, audio_io_handle_t output, 569 audio_devices_t device, int delayMs = 0, bool force = false); 570 571 // apply all stream volumes to the specified output and device 572 void applyStreamVolumes(audio_io_handle_t output, audio_devices_t device, int delayMs = 0, bool force = false); 573 574 // Mute or unmute all streams handled by the specified strategy on the specified output 575 void setStrategyMute(routing_strategy strategy, 576 bool on, 577 audio_io_handle_t output, 578 int delayMs = 0, 579 audio_devices_t device = (audio_devices_t)0); 580 581 // Mute or unmute the stream on the specified output 582 void setStreamMute(audio_stream_type_t stream, 583 bool on, 584 audio_io_handle_t output, 585 int delayMs = 0, 586 audio_devices_t device = (audio_devices_t)0); 587 588 // handle special cases for sonification strategy while in call: mute streams or replace by 589 // a special tone in the device used for communication 590 void handleIncallSonification(audio_stream_type_t stream, bool starting, bool stateChange); 591 592 // true if device is in a telephony or VoIP call 593 virtual bool isInCall(); 594 595 // true if given state represents a device in a telephony or VoIP call 596 virtual bool isStateInCall(int state); 597 598 // when a device is connected, checks if an open output can be routed 599 // to this device. If none is open, tries to open one of the available outputs. 600 // Returns an output suitable to this device or 0. 601 // when a device is disconnected, checks if an output is not used any more and 602 // returns its handle if any. 603 // transfers the audio tracks and effects from one output thread to another accordingly. 604 status_t checkOutputsForDevice(audio_devices_t device, 605 audio_policy_dev_state_t state, 606 SortedVector<audio_io_handle_t>& outputs, 607 const String8 address); 608 609 status_t checkInputsForDevice(audio_devices_t device, 610 audio_policy_dev_state_t state, 611 SortedVector<audio_io_handle_t>& inputs, 612 const String8 address); 613 614 // close an output and its companion duplicating output. 615 void closeOutput(audio_io_handle_t output); 616 617 // checks and if necessary changes outputs used for all strategies. 618 // must be called every time a condition that affects the output choice for a given strategy 619 // changes: connected device, phone state, force use... 620 // Must be called before updateDevicesAndOutputs() 621 void checkOutputForStrategy(routing_strategy strategy); 622 623 // Same as checkOutputForStrategy() but for a all strategies in order of priority 624 void checkOutputForAllStrategies(); 625 626 // manages A2DP output suspend/restore according to phone state and BT SCO usage 627 void checkA2dpSuspend(); 628 629 // returns the A2DP output handle if it is open or 0 otherwise 630 audio_io_handle_t getA2dpOutput(); 631 632 // selects the most appropriate device on output for current state 633 // must be called every time a condition that affects the device choice for a given output is 634 // changed: connected device, phone state, force use, output start, output stop.. 635 // see getDeviceForStrategy() for the use of fromCache parameter 636 audio_devices_t getNewOutputDevice(audio_io_handle_t output, bool fromCache); 637 638 // updates cache of device used by all strategies (mDeviceForStrategy[]) 639 // must be called every time a condition that affects the device choice for a given strategy is 640 // changed: connected device, phone state, force use... 641 // cached values are used by getDeviceForStrategy() if parameter fromCache is true. 642 // Must be called after checkOutputForAllStrategies() 643 void updateDevicesAndOutputs(); 644 645 // selects the most appropriate device on input for current state 646 audio_devices_t getNewInputDevice(audio_io_handle_t input); 647 648 virtual uint32_t getMaxEffectsCpuLoad(); 649 virtual uint32_t getMaxEffectsMemory(); 650#ifdef AUDIO_POLICY_TEST 651 virtual bool threadLoop(); 652 void exit(); 653 int testOutputIndex(audio_io_handle_t output); 654#endif //AUDIO_POLICY_TEST 655 656 status_t setEffectEnabled(const sp<EffectDescriptor>& effectDesc, bool enabled); 657 658 // returns the category the device belongs to with regard to volume curve management 659 static device_category getDeviceCategory(audio_devices_t device); 660 661 // extract one device relevant for volume control from multiple device selection 662 static audio_devices_t getDeviceForVolume(audio_devices_t device); 663 664 SortedVector<audio_io_handle_t> getOutputsForDevice(audio_devices_t device, 665 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > openOutputs); 666 bool vectorsEqual(SortedVector<audio_io_handle_t>& outputs1, 667 SortedVector<audio_io_handle_t>& outputs2); 668 669 // mute/unmute strategies using an incompatible device combination 670 // if muting, wait for the audio in pcm buffer to be drained before proceeding 671 // if unmuting, unmute only after the specified delay 672 // Returns the number of ms waited 673 uint32_t checkDeviceMuteStrategies(sp<AudioOutputDescriptor> outputDesc, 674 audio_devices_t prevDevice, 675 uint32_t delayMs); 676 677 audio_io_handle_t selectOutput(const SortedVector<audio_io_handle_t>& outputs, 678 audio_output_flags_t flags); 679 sp<IOProfile> getInputProfile(audio_devices_t device, 680 uint32_t samplingRate, 681 audio_format_t format, 682 audio_channel_mask_t channelMask, 683 audio_input_flags_t flags); 684 sp<IOProfile> getProfileForDirectOutput(audio_devices_t device, 685 uint32_t samplingRate, 686 audio_format_t format, 687 audio_channel_mask_t channelMask, 688 audio_output_flags_t flags); 689 690 audio_io_handle_t selectOutputForEffects(const SortedVector<audio_io_handle_t>& outputs); 691 692 bool isNonOffloadableEffectEnabled(); 693 694 status_t addAudioPatch(audio_patch_handle_t handle, 695 const sp<AudioPatch>& patch); 696 status_t removeAudioPatch(audio_patch_handle_t handle); 697 698 sp<AudioOutputDescriptor> getOutputFromId(audio_port_handle_t id) const; 699 sp<AudioInputDescriptor> getInputFromId(audio_port_handle_t id) const; 700 sp<HwModule> getModuleForDevice(audio_devices_t device) const; 701 sp<HwModule> getModuleFromName(const char *name) const; 702 // 703 // Audio policy configuration file parsing (audio_policy.conf) 704 // 705 static uint32_t stringToEnum(const struct StringToEnum *table, 706 size_t size, 707 const char *name); 708 static const char *enumToString(const struct StringToEnum *table, 709 size_t size, 710 uint32_t value); 711 static bool stringToBool(const char *value); 712 static audio_output_flags_t parseFlagNames(char *name); 713 static audio_devices_t parseDeviceNames(char *name); 714 void loadHwModule(cnode *root); 715 void loadHwModules(cnode *root); 716 void loadGlobalConfig(cnode *root, const sp<HwModule>& module); 717 status_t loadAudioPolicyConfig(const char *path); 718 void defaultAudioPolicyConfig(void); 719 720 721 uid_t mUidCached; 722 AudioPolicyClientInterface *mpClientInterface; // audio policy client interface 723 audio_io_handle_t mPrimaryOutput; // primary output handle 724 // list of descriptors for outputs currently opened 725 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mOutputs; 726 // copy of mOutputs before setDeviceConnectionState() opens new outputs 727 // reset to mOutputs when updateDevicesAndOutputs() is called. 728 DefaultKeyedVector<audio_io_handle_t, sp<AudioOutputDescriptor> > mPreviousOutputs; 729 DefaultKeyedVector<audio_io_handle_t, sp<AudioInputDescriptor> > mInputs; // list of input descriptors 730 DeviceVector mAvailableOutputDevices; // all available output devices 731 DeviceVector mAvailableInputDevices; // all available input devices 732 int mPhoneState; // current phone state 733 audio_policy_forced_cfg_t mForceUse[AUDIO_POLICY_FORCE_USE_CNT]; // current forced use configuration 734 735 StreamDescriptor mStreams[AUDIO_STREAM_CNT]; // stream descriptors for volume control 736 bool mLimitRingtoneVolume; // limit ringtone volume to music volume if headset connected 737 audio_devices_t mDeviceForStrategy[NUM_STRATEGIES]; 738 float mLastVoiceVolume; // last voice volume value sent to audio HAL 739 740 // Maximum CPU load allocated to audio effects in 0.1 MIPS (ARMv5TE, 0 WS memory) units 741 static const uint32_t MAX_EFFECTS_CPU_LOAD = 1000; 742 // Maximum memory allocated to audio effects in KB 743 static const uint32_t MAX_EFFECTS_MEMORY = 512; 744 uint32_t mTotalEffectsCpuLoad; // current CPU load used by effects 745 uint32_t mTotalEffectsMemory; // current memory used by effects 746 KeyedVector<int, sp<EffectDescriptor> > mEffects; // list of registered audio effects 747 bool mA2dpSuspended; // true if A2DP output is suspended 748 sp<DeviceDescriptor> mDefaultOutputDevice; // output device selected by default at boot time 749 bool mSpeakerDrcEnabled;// true on devices that use DRC on the DEVICE_CATEGORY_SPEAKER path 750 // to boost soft sounds, used to adjust volume curves accordingly 751 752 Vector < sp<HwModule> > mHwModules; 753 volatile int32_t mNextUniqueId; 754 volatile int32_t mAudioPortGeneration; 755 756 DefaultKeyedVector<audio_patch_handle_t, sp<AudioPatch> > mAudioPatches; 757 758#ifdef AUDIO_POLICY_TEST 759 Mutex mLock; 760 Condition mWaitWorkCV; 761 762 int mCurOutput; 763 bool mDirectOutput; 764 audio_io_handle_t mTestOutputs[NUM_TEST_OUTPUTS]; 765 int mTestInput; 766 uint32_t mTestDevice; 767 uint32_t mTestSamplingRate; 768 uint32_t mTestFormat; 769 uint32_t mTestChannels; 770 uint32_t mTestLatencyMs; 771#endif //AUDIO_POLICY_TEST 772 773private: 774 static float volIndexToAmpl(audio_devices_t device, const StreamDescriptor& streamDesc, 775 int indexInUi); 776 // updates device caching and output for streams that can influence the 777 // routing of notifications 778 void handleNotificationRoutingForStream(audio_stream_type_t stream); 779 static bool isVirtualInputDevice(audio_devices_t device); 780 static bool deviceDistinguishesOnAddress(audio_devices_t device); 781 // find the outputs on a given output descriptor that have the given address. 782 // to be called on an AudioOutputDescriptor whose supported devices (as defined 783 // in mProfile->mSupportedDevices) matches the device whose address is to be matched. 784 // see deviceDistinguishesOnAddress(audio_devices_t) for whether the device type is one 785 // where addresses are used to distinguish between one connected device and another. 786 void findIoHandlesByAddress(sp<AudioOutputDescriptor> desc /*in*/, 787 const String8 address /*in*/, 788 SortedVector<audio_io_handle_t>& outputs /*out*/); 789 uint32_t nextUniqueId(); 790 uint32_t nextAudioPortGeneration(); 791 uint32_t curAudioPortGeneration() const { return mAudioPortGeneration; } 792 // converts device address to string sent to audio HAL via setParameters 793 static String8 addressToParameter(audio_devices_t device, const String8 address); 794 // internal method to return the output handle for the given device and format 795 audio_io_handle_t getOutputForDevice( 796 audio_devices_t device, 797 audio_stream_type_t stream, 798 uint32_t samplingRate, 799 audio_format_t format, 800 audio_channel_mask_t channelMask, 801 audio_output_flags_t flags, 802 const audio_offload_info_t *offloadInfo); 803 // internal function to derive a stream type value from audio attributes 804 audio_stream_type_t streamTypefromAttributesInt(const audio_attributes_t *attr); 805}; 806 807}; 808