1 /* 2 ** 3 ** Copyright 2012, The Android Open Source Project 4 ** 5 ** Licensed under the Apache License, Version 2.0 (the "License"); 6 ** you may not use this file except in compliance with the License. 7 ** You may obtain a copy of the License at 8 ** 9 ** http://www.apache.org/licenses/LICENSE-2.0 10 ** 11 ** Unless required by applicable law or agreed to in writing, software 12 ** distributed under the License is distributed on an "AS IS" BASIS, 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 ** See the License for the specific language governing permissions and 15 ** limitations under the License. 16 */ 17 18 #ifndef INCLUDING_FROM_AUDIOFLINGER_H 19 #error This header file should only be included from AudioFlinger.h 20 #endif 21 22 class ThreadBase : public Thread { 23 public: 24 25 #include "TrackBase.h" 26 27 enum type_t { 28 MIXER, // Thread class is MixerThread 29 DIRECT, // Thread class is DirectOutputThread 30 DUPLICATING, // Thread class is DuplicatingThread 31 RECORD, // Thread class is RecordThread 32 OFFLOAD // Thread class is OffloadThread 33 }; 34 35 ThreadBase(const sp<AudioFlinger>& audioFlinger, audio_io_handle_t id, 36 audio_devices_t outDevice, audio_devices_t inDevice, type_t type); 37 virtual ~ThreadBase(); 38 39 virtual status_t readyToRun(); 40 41 void dumpBase(int fd, const Vector<String16>& args); 42 void dumpEffectChains(int fd, const Vector<String16>& args); 43 44 void clearPowerManager(); 45 46 // base for record and playback 47 enum { 48 CFG_EVENT_IO, 49 CFG_EVENT_PRIO, 50 CFG_EVENT_SET_PARAMETER, 51 CFG_EVENT_CREATE_AUDIO_PATCH, 52 CFG_EVENT_RELEASE_AUDIO_PATCH, 53 }; 54 55 class ConfigEventData: public RefBase { 56 public: 57 virtual ~ConfigEventData() {} 58 59 virtual void dump(char *buffer, size_t size) = 0; 60 protected: 61 ConfigEventData() {} 62 }; 63 64 // Config event sequence by client if status needed (e.g binder thread calling setParameters()): 65 // 1. create SetParameterConfigEvent. This sets mWaitStatus in config event 66 // 2. Lock mLock 67 // 3. Call sendConfigEvent_l(): Append to mConfigEvents and mWaitWorkCV.signal 68 // 4. sendConfigEvent_l() reads status from event->mStatus; 69 // 5. sendConfigEvent_l() returns status 70 // 6. Unlock 71 // 72 // Parameter sequence by server: threadLoop calling processConfigEvents_l(): 73 // 1. Lock mLock 74 // 2. If there is an entry in mConfigEvents proceed ... 75 // 3. Read first entry in mConfigEvents 76 // 4. Remove first entry from mConfigEvents 77 // 5. Process 78 // 6. Set event->mStatus 79 // 7. event->mCond.signal 80 // 8. Unlock 81 82 class ConfigEvent: public RefBase { 83 public: 84 virtual ~ConfigEvent() {} 85 86 void dump(char *buffer, size_t size) { mData->dump(buffer, size); } 87 88 const int mType; // event type e.g. CFG_EVENT_IO 89 Mutex mLock; // mutex associated with mCond 90 Condition mCond; // condition for status return 91 status_t mStatus; // status communicated to sender 92 bool mWaitStatus; // true if sender is waiting for status 93 sp<ConfigEventData> mData; // event specific parameter data 94 95 protected: 96 ConfigEvent(int type) : mType(type), mStatus(NO_ERROR), mWaitStatus(false), mData(NULL) {} 97 }; 98 99 class IoConfigEventData : public ConfigEventData { 100 public: 101 IoConfigEventData(int event, int param) : 102 mEvent(event), mParam(param) {} 103 104 virtual void dump(char *buffer, size_t size) { 105 snprintf(buffer, size, "IO event: event %d, param %d\n", mEvent, mParam); 106 } 107 108 const int mEvent; 109 const int mParam; 110 }; 111 112 class IoConfigEvent : public ConfigEvent { 113 public: 114 IoConfigEvent(int event, int param) : 115 ConfigEvent(CFG_EVENT_IO) { 116 mData = new IoConfigEventData(event, param); 117 } 118 virtual ~IoConfigEvent() {} 119 }; 120 121 class PrioConfigEventData : public ConfigEventData { 122 public: 123 PrioConfigEventData(pid_t pid, pid_t tid, int32_t prio) : 124 mPid(pid), mTid(tid), mPrio(prio) {} 125 126 virtual void dump(char *buffer, size_t size) { 127 snprintf(buffer, size, "Prio event: pid %d, tid %d, prio %d\n", mPid, mTid, mPrio); 128 } 129 130 const pid_t mPid; 131 const pid_t mTid; 132 const int32_t mPrio; 133 }; 134 135 class PrioConfigEvent : public ConfigEvent { 136 public: 137 PrioConfigEvent(pid_t pid, pid_t tid, int32_t prio) : 138 ConfigEvent(CFG_EVENT_PRIO) { 139 mData = new PrioConfigEventData(pid, tid, prio); 140 } 141 virtual ~PrioConfigEvent() {} 142 }; 143 144 class SetParameterConfigEventData : public ConfigEventData { 145 public: 146 SetParameterConfigEventData(String8 keyValuePairs) : 147 mKeyValuePairs(keyValuePairs) {} 148 149 virtual void dump(char *buffer, size_t size) { 150 snprintf(buffer, size, "KeyValue: %s\n", mKeyValuePairs.string()); 151 } 152 153 const String8 mKeyValuePairs; 154 }; 155 156 class SetParameterConfigEvent : public ConfigEvent { 157 public: 158 SetParameterConfigEvent(String8 keyValuePairs) : 159 ConfigEvent(CFG_EVENT_SET_PARAMETER) { 160 mData = new SetParameterConfigEventData(keyValuePairs); 161 mWaitStatus = true; 162 } 163 virtual ~SetParameterConfigEvent() {} 164 }; 165 166 class CreateAudioPatchConfigEventData : public ConfigEventData { 167 public: 168 CreateAudioPatchConfigEventData(const struct audio_patch patch, 169 audio_patch_handle_t handle) : 170 mPatch(patch), mHandle(handle) {} 171 172 virtual void dump(char *buffer, size_t size) { 173 snprintf(buffer, size, "Patch handle: %u\n", mHandle); 174 } 175 176 const struct audio_patch mPatch; 177 audio_patch_handle_t mHandle; 178 }; 179 180 class CreateAudioPatchConfigEvent : public ConfigEvent { 181 public: 182 CreateAudioPatchConfigEvent(const struct audio_patch patch, 183 audio_patch_handle_t handle) : 184 ConfigEvent(CFG_EVENT_CREATE_AUDIO_PATCH) { 185 mData = new CreateAudioPatchConfigEventData(patch, handle); 186 mWaitStatus = true; 187 } 188 virtual ~CreateAudioPatchConfigEvent() {} 189 }; 190 191 class ReleaseAudioPatchConfigEventData : public ConfigEventData { 192 public: 193 ReleaseAudioPatchConfigEventData(const audio_patch_handle_t handle) : 194 mHandle(handle) {} 195 196 virtual void dump(char *buffer, size_t size) { 197 snprintf(buffer, size, "Patch handle: %u\n", mHandle); 198 } 199 200 audio_patch_handle_t mHandle; 201 }; 202 203 class ReleaseAudioPatchConfigEvent : public ConfigEvent { 204 public: 205 ReleaseAudioPatchConfigEvent(const audio_patch_handle_t handle) : 206 ConfigEvent(CFG_EVENT_RELEASE_AUDIO_PATCH) { 207 mData = new ReleaseAudioPatchConfigEventData(handle); 208 mWaitStatus = true; 209 } 210 virtual ~ReleaseAudioPatchConfigEvent() {} 211 }; 212 213 class PMDeathRecipient : public IBinder::DeathRecipient { 214 public: 215 PMDeathRecipient(const wp<ThreadBase>& thread) : mThread(thread) {} 216 virtual ~PMDeathRecipient() {} 217 218 // IBinder::DeathRecipient 219 virtual void binderDied(const wp<IBinder>& who); 220 221 private: 222 PMDeathRecipient(const PMDeathRecipient&); 223 PMDeathRecipient& operator = (const PMDeathRecipient&); 224 225 wp<ThreadBase> mThread; 226 }; 227 228 virtual status_t initCheck() const = 0; 229 230 // static externally-visible 231 type_t type() const { return mType; } 232 audio_io_handle_t id() const { return mId;} 233 234 // dynamic externally-visible 235 uint32_t sampleRate() const { return mSampleRate; } 236 audio_channel_mask_t channelMask() const { return mChannelMask; } 237 audio_format_t format() const { return mHALFormat; } 238 uint32_t channelCount() const { return mChannelCount; } 239 // Called by AudioFlinger::frameCount(audio_io_handle_t output) and effects, 240 // and returns the [normal mix] buffer's frame count. 241 virtual size_t frameCount() const = 0; 242 size_t frameSize() const { return mFrameSize; } 243 244 // Should be "virtual status_t requestExitAndWait()" and override same 245 // method in Thread, but Thread::requestExitAndWait() is not yet virtual. 246 void exit(); 247 virtual bool checkForNewParameter_l(const String8& keyValuePair, 248 status_t& status) = 0; 249 virtual status_t setParameters(const String8& keyValuePairs); 250 virtual String8 getParameters(const String8& keys) = 0; 251 virtual void audioConfigChanged(int event, int param = 0) = 0; 252 // sendConfigEvent_l() must be called with ThreadBase::mLock held 253 // Can temporarily release the lock if waiting for a reply from 254 // processConfigEvents_l(). 255 status_t sendConfigEvent_l(sp<ConfigEvent>& event); 256 void sendIoConfigEvent(int event, int param = 0); 257 void sendIoConfigEvent_l(int event, int param = 0); 258 void sendPrioConfigEvent_l(pid_t pid, pid_t tid, int32_t prio); 259 status_t sendSetParameterConfigEvent_l(const String8& keyValuePair); 260 status_t sendCreateAudioPatchConfigEvent(const struct audio_patch *patch, 261 audio_patch_handle_t *handle); 262 status_t sendReleaseAudioPatchConfigEvent(audio_patch_handle_t handle); 263 void processConfigEvents_l(); 264 virtual void cacheParameters_l() = 0; 265 virtual status_t createAudioPatch_l(const struct audio_patch *patch, 266 audio_patch_handle_t *handle) = 0; 267 virtual status_t releaseAudioPatch_l(const audio_patch_handle_t handle) = 0; 268 virtual void getAudioPortConfig(struct audio_port_config *config) = 0; 269 270 271 // see note at declaration of mStandby, mOutDevice and mInDevice 272 bool standby() const { return mStandby; } 273 audio_devices_t outDevice() const { return mOutDevice; } 274 audio_devices_t inDevice() const { return mInDevice; } 275 276 virtual audio_stream_t* stream() const = 0; 277 278 sp<EffectHandle> createEffect_l( 279 const sp<AudioFlinger::Client>& client, 280 const sp<IEffectClient>& effectClient, 281 int32_t priority, 282 int sessionId, 283 effect_descriptor_t *desc, 284 int *enabled, 285 status_t *status /*non-NULL*/); 286 287 // return values for hasAudioSession (bit field) 288 enum effect_state { 289 EFFECT_SESSION = 0x1, // the audio session corresponds to at least one 290 // effect 291 TRACK_SESSION = 0x2 // the audio session corresponds to at least one 292 // track 293 }; 294 295 // get effect chain corresponding to session Id. 296 sp<EffectChain> getEffectChain(int sessionId); 297 // same as getEffectChain() but must be called with ThreadBase mutex locked 298 sp<EffectChain> getEffectChain_l(int sessionId) const; 299 // add an effect chain to the chain list (mEffectChains) 300 virtual status_t addEffectChain_l(const sp<EffectChain>& chain) = 0; 301 // remove an effect chain from the chain list (mEffectChains) 302 virtual size_t removeEffectChain_l(const sp<EffectChain>& chain) = 0; 303 // lock all effect chains Mutexes. Must be called before releasing the 304 // ThreadBase mutex before processing the mixer and effects. This guarantees the 305 // integrity of the chains during the process. 306 // Also sets the parameter 'effectChains' to current value of mEffectChains. 307 void lockEffectChains_l(Vector< sp<EffectChain> >& effectChains); 308 // unlock effect chains after process 309 void unlockEffectChains(const Vector< sp<EffectChain> >& effectChains); 310 // get a copy of mEffectChains vector 311 Vector< sp<EffectChain> > getEffectChains_l() const { return mEffectChains; }; 312 // set audio mode to all effect chains 313 void setMode(audio_mode_t mode); 314 // get effect module with corresponding ID on specified audio session 315 sp<AudioFlinger::EffectModule> getEffect(int sessionId, int effectId); 316 sp<AudioFlinger::EffectModule> getEffect_l(int sessionId, int effectId); 317 // add and effect module. Also creates the effect chain is none exists for 318 // the effects audio session 319 status_t addEffect_l(const sp< EffectModule>& effect); 320 // remove and effect module. Also removes the effect chain is this was the last 321 // effect 322 void removeEffect_l(const sp< EffectModule>& effect); 323 // detach all tracks connected to an auxiliary effect 324 virtual void detachAuxEffect_l(int effectId __unused) {} 325 // returns either EFFECT_SESSION if effects on this audio session exist in one 326 // chain, or TRACK_SESSION if tracks on this audio session exist, or both 327 virtual uint32_t hasAudioSession(int sessionId) const = 0; 328 // the value returned by default implementation is not important as the 329 // strategy is only meaningful for PlaybackThread which implements this method 330 virtual uint32_t getStrategyForSession_l(int sessionId __unused) { return 0; } 331 332 // suspend or restore effect according to the type of effect passed. a NULL 333 // type pointer means suspend all effects in the session 334 void setEffectSuspended(const effect_uuid_t *type, 335 bool suspend, 336 int sessionId = AUDIO_SESSION_OUTPUT_MIX); 337 // check if some effects must be suspended/restored when an effect is enabled 338 // or disabled 339 void checkSuspendOnEffectEnabled(const sp<EffectModule>& effect, 340 bool enabled, 341 int sessionId = AUDIO_SESSION_OUTPUT_MIX); 342 void checkSuspendOnEffectEnabled_l(const sp<EffectModule>& effect, 343 bool enabled, 344 int sessionId = AUDIO_SESSION_OUTPUT_MIX); 345 346 virtual status_t setSyncEvent(const sp<SyncEvent>& event) = 0; 347 virtual bool isValidSyncEvent(const sp<SyncEvent>& event) const = 0; 348 349 // Return a reference to a per-thread heap which can be used to allocate IMemory 350 // objects that will be read-only to client processes, read/write to mediaserver, 351 // and shared by all client processes of the thread. 352 // The heap is per-thread rather than common across all threads, because 353 // clients can't be trusted not to modify the offset of the IMemory they receive. 354 // If a thread does not have such a heap, this method returns 0. 355 virtual sp<MemoryDealer> readOnlyHeap() const { return 0; } 356 357 virtual sp<IMemory> pipeMemory() const { return 0; } 358 359 mutable Mutex mLock; 360 361 protected: 362 363 // entry describing an effect being suspended in mSuspendedSessions keyed vector 364 class SuspendedSessionDesc : public RefBase { 365 public: 366 SuspendedSessionDesc() : mRefCount(0) {} 367 368 int mRefCount; // number of active suspend requests 369 effect_uuid_t mType; // effect type UUID 370 }; 371 372 void acquireWakeLock(int uid = -1); 373 void acquireWakeLock_l(int uid = -1); 374 void releaseWakeLock(); 375 void releaseWakeLock_l(); 376 void updateWakeLockUids(const SortedVector<int> &uids); 377 void updateWakeLockUids_l(const SortedVector<int> &uids); 378 void getPowerManager_l(); 379 void setEffectSuspended_l(const effect_uuid_t *type, 380 bool suspend, 381 int sessionId); 382 // updated mSuspendedSessions when an effect suspended or restored 383 void updateSuspendedSessions_l(const effect_uuid_t *type, 384 bool suspend, 385 int sessionId); 386 // check if some effects must be suspended when an effect chain is added 387 void checkSuspendOnAddEffectChain_l(const sp<EffectChain>& chain); 388 389 String16 getWakeLockTag(); 390 391 virtual void preExit() { } 392 393 friend class AudioFlinger; // for mEffectChains 394 395 const type_t mType; 396 397 // Used by parameters, config events, addTrack_l, exit 398 Condition mWaitWorkCV; 399 400 const sp<AudioFlinger> mAudioFlinger; 401 402 // updated by PlaybackThread::readOutputParameters_l() or 403 // RecordThread::readInputParameters_l() 404 uint32_t mSampleRate; 405 size_t mFrameCount; // output HAL, direct output, record 406 audio_channel_mask_t mChannelMask; 407 uint32_t mChannelCount; 408 size_t mFrameSize; 409 audio_format_t mFormat; // Source format for Recording and 410 // Sink format for Playback. 411 // Sink format may be different than 412 // HAL format if Fastmixer is used. 413 audio_format_t mHALFormat; 414 size_t mBufferSize; // HAL buffer size for read() or write() 415 416 Vector< sp<ConfigEvent> > mConfigEvents; 417 418 // These fields are written and read by thread itself without lock or barrier, 419 // and read by other threads without lock or barrier via standby(), outDevice() 420 // and inDevice(). 421 // Because of the absence of a lock or barrier, any other thread that reads 422 // these fields must use the information in isolation, or be prepared to deal 423 // with possibility that it might be inconsistent with other information. 424 bool mStandby; // Whether thread is currently in standby. 425 audio_devices_t mOutDevice; // output device 426 audio_devices_t mInDevice; // input device 427 audio_source_t mAudioSource; // (see audio.h, audio_source_t) 428 429 const audio_io_handle_t mId; 430 Vector< sp<EffectChain> > mEffectChains; 431 432 static const int kNameLength = 16; // prctl(PR_SET_NAME) limit 433 char mName[kNameLength]; 434 sp<IPowerManager> mPowerManager; 435 sp<IBinder> mWakeLockToken; 436 const sp<PMDeathRecipient> mDeathRecipient; 437 // list of suspended effects per session and per type. The first vector is 438 // keyed by session ID, the second by type UUID timeLow field 439 KeyedVector< int, KeyedVector< int, sp<SuspendedSessionDesc> > > 440 mSuspendedSessions; 441 static const size_t kLogSize = 4 * 1024; 442 sp<NBLog::Writer> mNBLogWriter; 443 }; 444 445 // --- PlaybackThread --- 446 class PlaybackThread : public ThreadBase { 447 public: 448 449 #include "PlaybackTracks.h" 450 451 enum mixer_state { 452 MIXER_IDLE, // no active tracks 453 MIXER_TRACKS_ENABLED, // at least one active track, but no track has any data ready 454 MIXER_TRACKS_READY, // at least one active track, and at least one track has data 455 MIXER_DRAIN_TRACK, // drain currently playing track 456 MIXER_DRAIN_ALL, // fully drain the hardware 457 // standby mode does not have an enum value 458 // suspend by audio policy manager is orthogonal to mixer state 459 }; 460 461 // retry count before removing active track in case of underrun on offloaded thread: 462 // we need to make sure that AudioTrack client has enough time to send large buffers 463 //FIXME may be more appropriate if expressed in time units. Need to revise how underrun is handled 464 // for offloaded tracks 465 static const int8_t kMaxTrackRetriesOffload = 20; 466 467 PlaybackThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, 468 audio_io_handle_t id, audio_devices_t device, type_t type); 469 virtual ~PlaybackThread(); 470 471 void dump(int fd, const Vector<String16>& args); 472 473 // Thread virtuals 474 virtual bool threadLoop(); 475 476 // RefBase 477 virtual void onFirstRef(); 478 479 protected: 480 // Code snippets that were lifted up out of threadLoop() 481 virtual void threadLoop_mix() = 0; 482 virtual void threadLoop_sleepTime() = 0; 483 virtual ssize_t threadLoop_write(); 484 virtual void threadLoop_drain(); 485 virtual void threadLoop_standby(); 486 virtual void threadLoop_exit(); 487 virtual void threadLoop_removeTracks(const Vector< sp<Track> >& tracksToRemove); 488 489 // prepareTracks_l reads and writes mActiveTracks, and returns 490 // the pending set of tracks to remove via Vector 'tracksToRemove'. The caller 491 // is responsible for clearing or destroying this Vector later on, when it 492 // is safe to do so. That will drop the final ref count and destroy the tracks. 493 virtual mixer_state prepareTracks_l(Vector< sp<Track> > *tracksToRemove) = 0; 494 void removeTracks_l(const Vector< sp<Track> >& tracksToRemove); 495 496 void writeCallback(); 497 void resetWriteBlocked(uint32_t sequence); 498 void drainCallback(); 499 void resetDraining(uint32_t sequence); 500 501 static int asyncCallback(stream_callback_event_t event, void *param, void *cookie); 502 503 virtual bool waitingAsyncCallback(); 504 virtual bool waitingAsyncCallback_l(); 505 virtual bool shouldStandby_l(); 506 virtual void onAddNewTrack_l(); 507 508 // ThreadBase virtuals 509 virtual void preExit(); 510 511 public: 512 513 virtual status_t initCheck() const { return (mOutput == NULL) ? NO_INIT : NO_ERROR; } 514 515 // return estimated latency in milliseconds, as reported by HAL 516 uint32_t latency() const; 517 // same, but lock must already be held 518 uint32_t latency_l() const; 519 520 void setMasterVolume(float value); 521 void setMasterMute(bool muted); 522 523 void setStreamVolume(audio_stream_type_t stream, float value); 524 void setStreamMute(audio_stream_type_t stream, bool muted); 525 526 float streamVolume(audio_stream_type_t stream) const; 527 528 sp<Track> createTrack_l( 529 const sp<AudioFlinger::Client>& client, 530 audio_stream_type_t streamType, 531 uint32_t sampleRate, 532 audio_format_t format, 533 audio_channel_mask_t channelMask, 534 size_t *pFrameCount, 535 const sp<IMemory>& sharedBuffer, 536 int sessionId, 537 IAudioFlinger::track_flags_t *flags, 538 pid_t tid, 539 int uid, 540 status_t *status /*non-NULL*/); 541 542 AudioStreamOut* getOutput() const; 543 AudioStreamOut* clearOutput(); 544 virtual audio_stream_t* stream() const; 545 546 // a very large number of suspend() will eventually wraparound, but unlikely 547 void suspend() { (void) android_atomic_inc(&mSuspended); } 548 void restore() 549 { 550 // if restore() is done without suspend(), get back into 551 // range so that the next suspend() will operate correctly 552 if (android_atomic_dec(&mSuspended) <= 0) { 553 android_atomic_release_store(0, &mSuspended); 554 } 555 } 556 bool isSuspended() const 557 { return android_atomic_acquire_load(&mSuspended) > 0; } 558 559 virtual String8 getParameters(const String8& keys); 560 virtual void audioConfigChanged(int event, int param = 0); 561 status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames); 562 // FIXME rename mixBuffer() to sinkBuffer() and remove int16_t* dependency. 563 // Consider also removing and passing an explicit mMainBuffer initialization 564 // parameter to AF::PlaybackThread::Track::Track(). 565 int16_t *mixBuffer() const { 566 return reinterpret_cast<int16_t *>(mSinkBuffer); }; 567 568 virtual void detachAuxEffect_l(int effectId); 569 status_t attachAuxEffect(const sp<AudioFlinger::PlaybackThread::Track> track, 570 int EffectId); 571 status_t attachAuxEffect_l(const sp<AudioFlinger::PlaybackThread::Track> track, 572 int EffectId); 573 574 virtual status_t addEffectChain_l(const sp<EffectChain>& chain); 575 virtual size_t removeEffectChain_l(const sp<EffectChain>& chain); 576 virtual uint32_t hasAudioSession(int sessionId) const; 577 virtual uint32_t getStrategyForSession_l(int sessionId); 578 579 580 virtual status_t setSyncEvent(const sp<SyncEvent>& event); 581 virtual bool isValidSyncEvent(const sp<SyncEvent>& event) const; 582 583 // called with AudioFlinger lock held 584 void invalidateTracks(audio_stream_type_t streamType); 585 586 virtual size_t frameCount() const { return mNormalFrameCount; } 587 588 // Return's the HAL's frame count i.e. fast mixer buffer size. 589 size_t frameCountHAL() const { return mFrameCount; } 590 591 status_t getTimestamp_l(AudioTimestamp& timestamp); 592 593 void addPatchTrack(const sp<PatchTrack>& track); 594 void deletePatchTrack(const sp<PatchTrack>& track); 595 596 virtual void getAudioPortConfig(struct audio_port_config *config); 597 598 protected: 599 // updated by readOutputParameters_l() 600 size_t mNormalFrameCount; // normal mixer and effects 601 602 void* mSinkBuffer; // frame size aligned sink buffer 603 604 // TODO: 605 // Rearrange the buffer info into a struct/class with 606 // clear, copy, construction, destruction methods. 607 // 608 // mSinkBuffer also has associated with it: 609 // 610 // mSinkBufferSize: Sink Buffer Size 611 // mFormat: Sink Buffer Format 612 613 // Mixer Buffer (mMixerBuffer*) 614 // 615 // In the case of floating point or multichannel data, which is not in the 616 // sink format, it is required to accumulate in a higher precision or greater channel count 617 // buffer before downmixing or data conversion to the sink buffer. 618 619 // Set to "true" to enable the Mixer Buffer otherwise mixer output goes to sink buffer. 620 bool mMixerBufferEnabled; 621 622 // Storage, 32 byte aligned (may make this alignment a requirement later). 623 // Due to constraints on mNormalFrameCount, the buffer size is a multiple of 16 frames. 624 void* mMixerBuffer; 625 626 // Size of mMixerBuffer in bytes: mNormalFrameCount * #channels * sampsize. 627 size_t mMixerBufferSize; 628 629 // The audio format of mMixerBuffer. Set to AUDIO_FORMAT_PCM_(FLOAT|16_BIT) only. 630 audio_format_t mMixerBufferFormat; 631 632 // An internal flag set to true by MixerThread::prepareTracks_l() 633 // when mMixerBuffer contains valid data after mixing. 634 bool mMixerBufferValid; 635 636 // Effects Buffer (mEffectsBuffer*) 637 // 638 // In the case of effects data, which is not in the sink format, 639 // it is required to accumulate in a different buffer before data conversion 640 // to the sink buffer. 641 642 // Set to "true" to enable the Effects Buffer otherwise effects output goes to sink buffer. 643 bool mEffectBufferEnabled; 644 645 // Storage, 32 byte aligned (may make this alignment a requirement later). 646 // Due to constraints on mNormalFrameCount, the buffer size is a multiple of 16 frames. 647 void* mEffectBuffer; 648 649 // Size of mEffectsBuffer in bytes: mNormalFrameCount * #channels * sampsize. 650 size_t mEffectBufferSize; 651 652 // The audio format of mEffectsBuffer. Set to AUDIO_FORMAT_PCM_16_BIT only. 653 audio_format_t mEffectBufferFormat; 654 655 // An internal flag set to true by MixerThread::prepareTracks_l() 656 // when mEffectsBuffer contains valid data after mixing. 657 // 658 // When this is set, all mixer data is routed into the effects buffer 659 // for any processing (including output processing). 660 bool mEffectBufferValid; 661 662 // suspend count, > 0 means suspended. While suspended, the thread continues to pull from 663 // tracks and mix, but doesn't write to HAL. A2DP and SCO HAL implementations can't handle 664 // concurrent use of both of them, so Audio Policy Service suspends one of the threads to 665 // workaround that restriction. 666 // 'volatile' means accessed via atomic operations and no lock. 667 volatile int32_t mSuspended; 668 669 // FIXME overflows every 6+ hours at 44.1 kHz stereo 16-bit samples 670 // mFramesWritten would be better, or 64-bit even better 671 size_t mBytesWritten; 672 private: 673 // mMasterMute is in both PlaybackThread and in AudioFlinger. When a 674 // PlaybackThread needs to find out if master-muted, it checks it's local 675 // copy rather than the one in AudioFlinger. This optimization saves a lock. 676 bool mMasterMute; 677 void setMasterMute_l(bool muted) { mMasterMute = muted; } 678 protected: 679 SortedVector< wp<Track> > mActiveTracks; // FIXME check if this could be sp<> 680 SortedVector<int> mWakeLockUids; 681 int mActiveTracksGeneration; 682 wp<Track> mLatestActiveTrack; // latest track added to mActiveTracks 683 684 // Allocate a track name for a given channel mask. 685 // Returns name >= 0 if successful, -1 on failure. 686 virtual int getTrackName_l(audio_channel_mask_t channelMask, 687 audio_format_t format, int sessionId) = 0; 688 virtual void deleteTrackName_l(int name) = 0; 689 690 // Time to sleep between cycles when: 691 virtual uint32_t activeSleepTimeUs() const; // mixer state MIXER_TRACKS_ENABLED 692 virtual uint32_t idleSleepTimeUs() const = 0; // mixer state MIXER_IDLE 693 virtual uint32_t suspendSleepTimeUs() const = 0; // audio policy manager suspended us 694 // No sleep when mixer state == MIXER_TRACKS_READY; relies on audio HAL stream->write() 695 // No sleep in standby mode; waits on a condition 696 697 // Code snippets that are temporarily lifted up out of threadLoop() until the merge 698 void checkSilentMode_l(); 699 700 // Non-trivial for DUPLICATING only 701 virtual void saveOutputTracks() { } 702 virtual void clearOutputTracks() { } 703 704 // Cache various calculated values, at threadLoop() entry and after a parameter change 705 virtual void cacheParameters_l(); 706 707 virtual uint32_t correctLatency_l(uint32_t latency) const; 708 709 virtual status_t createAudioPatch_l(const struct audio_patch *patch, 710 audio_patch_handle_t *handle); 711 virtual status_t releaseAudioPatch_l(const audio_patch_handle_t handle); 712 713 private: 714 715 friend class AudioFlinger; // for numerous 716 717 PlaybackThread& operator = (const PlaybackThread&); 718 719 status_t addTrack_l(const sp<Track>& track); 720 bool destroyTrack_l(const sp<Track>& track); 721 void removeTrack_l(const sp<Track>& track); 722 void broadcast_l(); 723 724 void readOutputParameters_l(); 725 726 virtual void dumpInternals(int fd, const Vector<String16>& args); 727 void dumpTracks(int fd, const Vector<String16>& args); 728 729 SortedVector< sp<Track> > mTracks; 730 // mStreamTypes[] uses 1 additional stream type internally for the OutputTrack used by 731 // DuplicatingThread 732 stream_type_t mStreamTypes[AUDIO_STREAM_CNT + 1]; 733 AudioStreamOut *mOutput; 734 735 float mMasterVolume; 736 nsecs_t mLastWriteTime; 737 int mNumWrites; 738 int mNumDelayedWrites; 739 bool mInWrite; 740 741 // FIXME rename these former local variables of threadLoop to standard "m" names 742 nsecs_t standbyTime; 743 size_t mSinkBufferSize; 744 745 // cached copies of activeSleepTimeUs() and idleSleepTimeUs() made by cacheParameters_l() 746 uint32_t activeSleepTime; 747 uint32_t idleSleepTime; 748 749 uint32_t sleepTime; 750 751 // mixer status returned by prepareTracks_l() 752 mixer_state mMixerStatus; // current cycle 753 // previous cycle when in prepareTracks_l() 754 mixer_state mMixerStatusIgnoringFastTracks; 755 // FIXME or a separate ready state per track 756 757 // FIXME move these declarations into the specific sub-class that needs them 758 // MIXER only 759 uint32_t sleepTimeShift; 760 761 // same as AudioFlinger::mStandbyTimeInNsecs except for DIRECT which uses a shorter value 762 nsecs_t standbyDelay; 763 764 // MIXER only 765 nsecs_t maxPeriod; 766 767 // DUPLICATING only 768 uint32_t writeFrames; 769 770 size_t mBytesRemaining; 771 size_t mCurrentWriteLength; 772 bool mUseAsyncWrite; 773 // mWriteAckSequence contains current write sequence on bits 31-1. The write sequence is 774 // incremented each time a write(), a flush() or a standby() occurs. 775 // Bit 0 is set when a write blocks and indicates a callback is expected. 776 // Bit 0 is reset by the async callback thread calling resetWriteBlocked(). Out of sequence 777 // callbacks are ignored. 778 uint32_t mWriteAckSequence; 779 // mDrainSequence contains current drain sequence on bits 31-1. The drain sequence is 780 // incremented each time a drain is requested or a flush() or standby() occurs. 781 // Bit 0 is set when the drain() command is called at the HAL and indicates a callback is 782 // expected. 783 // Bit 0 is reset by the async callback thread calling resetDraining(). Out of sequence 784 // callbacks are ignored. 785 uint32_t mDrainSequence; 786 // A condition that must be evaluated by prepareTrack_l() has changed and we must not wait 787 // for async write callback in the thread loop before evaluating it 788 bool mSignalPending; 789 sp<AsyncCallbackThread> mCallbackThread; 790 791 private: 792 // The HAL output sink is treated as non-blocking, but current implementation is blocking 793 sp<NBAIO_Sink> mOutputSink; 794 // If a fast mixer is present, the blocking pipe sink, otherwise clear 795 sp<NBAIO_Sink> mPipeSink; 796 // The current sink for the normal mixer to write it's (sub)mix, mOutputSink or mPipeSink 797 sp<NBAIO_Sink> mNormalSink; 798 #ifdef TEE_SINK 799 // For dumpsys 800 sp<NBAIO_Sink> mTeeSink; 801 sp<NBAIO_Source> mTeeSource; 802 #endif 803 uint32_t mScreenState; // cached copy of gScreenState 804 static const size_t kFastMixerLogSize = 4 * 1024; 805 sp<NBLog::Writer> mFastMixerNBLogWriter; 806 public: 807 virtual bool hasFastMixer() const = 0; 808 virtual FastTrackUnderruns getFastTrackUnderruns(size_t fastIndex __unused) const 809 { FastTrackUnderruns dummy; return dummy; } 810 811 protected: 812 // accessed by both binder threads and within threadLoop(), lock on mutex needed 813 unsigned mFastTrackAvailMask; // bit i set if fast track [i] is available 814 815 private: 816 // timestamp latch: 817 // D input is written by threadLoop_write while mutex is unlocked, and read while locked 818 // Q output is written while locked, and read while locked 819 struct { 820 AudioTimestamp mTimestamp; 821 uint32_t mUnpresentedFrames; 822 KeyedVector<Track *, uint32_t> mFramesReleased; 823 } mLatchD, mLatchQ; 824 bool mLatchDValid; // true means mLatchD is valid 825 // (except for mFramesReleased which is filled in later), 826 // and clock it into latch at next opportunity 827 bool mLatchQValid; // true means mLatchQ is valid 828 }; 829 830 class MixerThread : public PlaybackThread { 831 public: 832 MixerThread(const sp<AudioFlinger>& audioFlinger, 833 AudioStreamOut* output, 834 audio_io_handle_t id, 835 audio_devices_t device, 836 type_t type = MIXER); 837 virtual ~MixerThread(); 838 839 // Thread virtuals 840 841 virtual bool checkForNewParameter_l(const String8& keyValuePair, 842 status_t& status); 843 virtual void dumpInternals(int fd, const Vector<String16>& args); 844 845 protected: 846 virtual mixer_state prepareTracks_l(Vector< sp<Track> > *tracksToRemove); 847 virtual int getTrackName_l(audio_channel_mask_t channelMask, 848 audio_format_t format, int sessionId); 849 virtual void deleteTrackName_l(int name); 850 virtual uint32_t idleSleepTimeUs() const; 851 virtual uint32_t suspendSleepTimeUs() const; 852 virtual void cacheParameters_l(); 853 854 // threadLoop snippets 855 virtual ssize_t threadLoop_write(); 856 virtual void threadLoop_standby(); 857 virtual void threadLoop_mix(); 858 virtual void threadLoop_sleepTime(); 859 virtual void threadLoop_removeTracks(const Vector< sp<Track> >& tracksToRemove); 860 virtual uint32_t correctLatency_l(uint32_t latency) const; 861 862 AudioMixer* mAudioMixer; // normal mixer 863 private: 864 // one-time initialization, no locks required 865 sp<FastMixer> mFastMixer; // non-0 if there is also a fast mixer 866 sp<AudioWatchdog> mAudioWatchdog; // non-0 if there is an audio watchdog thread 867 868 // contents are not guaranteed to be consistent, no locks required 869 FastMixerDumpState mFastMixerDumpState; 870 #ifdef STATE_QUEUE_DUMP 871 StateQueueObserverDump mStateQueueObserverDump; 872 StateQueueMutatorDump mStateQueueMutatorDump; 873 #endif 874 AudioWatchdogDump mAudioWatchdogDump; 875 876 // accessible only within the threadLoop(), no locks required 877 // mFastMixer->sq() // for mutating and pushing state 878 int32_t mFastMixerFutex; // for cold idle 879 880 public: 881 virtual bool hasFastMixer() const { return mFastMixer != 0; } 882 virtual FastTrackUnderruns getFastTrackUnderruns(size_t fastIndex) const { 883 ALOG_ASSERT(fastIndex < FastMixerState::kMaxFastTracks); 884 return mFastMixerDumpState.mTracks[fastIndex].mUnderruns; 885 } 886 887 }; 888 889 class DirectOutputThread : public PlaybackThread { 890 public: 891 892 DirectOutputThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, 893 audio_io_handle_t id, audio_devices_t device); 894 virtual ~DirectOutputThread(); 895 896 // Thread virtuals 897 898 virtual bool checkForNewParameter_l(const String8& keyValuePair, 899 status_t& status); 900 virtual void flushHw_l(); 901 902 protected: 903 virtual int getTrackName_l(audio_channel_mask_t channelMask, 904 audio_format_t format, int sessionId); 905 virtual void deleteTrackName_l(int name); 906 virtual uint32_t activeSleepTimeUs() const; 907 virtual uint32_t idleSleepTimeUs() const; 908 virtual uint32_t suspendSleepTimeUs() const; 909 virtual void cacheParameters_l(); 910 911 // threadLoop snippets 912 virtual mixer_state prepareTracks_l(Vector< sp<Track> > *tracksToRemove); 913 virtual void threadLoop_mix(); 914 virtual void threadLoop_sleepTime(); 915 916 // volumes last sent to audio HAL with stream->set_volume() 917 float mLeftVolFloat; 918 float mRightVolFloat; 919 920 DirectOutputThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, 921 audio_io_handle_t id, uint32_t device, ThreadBase::type_t type); 922 void processVolume_l(Track *track, bool lastTrack); 923 924 // prepareTracks_l() tells threadLoop_mix() the name of the single active track 925 sp<Track> mActiveTrack; 926 public: 927 virtual bool hasFastMixer() const { return false; } 928 }; 929 930 class OffloadThread : public DirectOutputThread { 931 public: 932 933 OffloadThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, 934 audio_io_handle_t id, uint32_t device); 935 virtual ~OffloadThread() {}; 936 virtual void flushHw_l(); 937 938 protected: 939 // threadLoop snippets 940 virtual mixer_state prepareTracks_l(Vector< sp<Track> > *tracksToRemove); 941 virtual void threadLoop_exit(); 942 943 virtual bool waitingAsyncCallback(); 944 virtual bool waitingAsyncCallback_l(); 945 virtual bool shouldStandby_l(); 946 virtual void onAddNewTrack_l(); 947 948 private: 949 bool mHwPaused; 950 bool mFlushPending; 951 size_t mPausedWriteLength; // length in bytes of write interrupted by pause 952 size_t mPausedBytesRemaining; // bytes still waiting in mixbuffer after resume 953 wp<Track> mPreviousTrack; // used to detect track switch 954 }; 955 956 class AsyncCallbackThread : public Thread { 957 public: 958 959 AsyncCallbackThread(const wp<PlaybackThread>& playbackThread); 960 961 virtual ~AsyncCallbackThread(); 962 963 // Thread virtuals 964 virtual bool threadLoop(); 965 966 // RefBase 967 virtual void onFirstRef(); 968 969 void exit(); 970 void setWriteBlocked(uint32_t sequence); 971 void resetWriteBlocked(); 972 void setDraining(uint32_t sequence); 973 void resetDraining(); 974 975 private: 976 const wp<PlaybackThread> mPlaybackThread; 977 // mWriteAckSequence corresponds to the last write sequence passed by the offload thread via 978 // setWriteBlocked(). The sequence is shifted one bit to the left and the lsb is used 979 // to indicate that the callback has been received via resetWriteBlocked() 980 uint32_t mWriteAckSequence; 981 // mDrainSequence corresponds to the last drain sequence passed by the offload thread via 982 // setDraining(). The sequence is shifted one bit to the left and the lsb is used 983 // to indicate that the callback has been received via resetDraining() 984 uint32_t mDrainSequence; 985 Condition mWaitWorkCV; 986 Mutex mLock; 987 }; 988 989 class DuplicatingThread : public MixerThread { 990 public: 991 DuplicatingThread(const sp<AudioFlinger>& audioFlinger, MixerThread* mainThread, 992 audio_io_handle_t id); 993 virtual ~DuplicatingThread(); 994 995 // Thread virtuals 996 void addOutputTrack(MixerThread* thread); 997 void removeOutputTrack(MixerThread* thread); 998 uint32_t waitTimeMs() const { return mWaitTimeMs; } 999 protected: 1000 virtual uint32_t activeSleepTimeUs() const; 1001 1002 private: 1003 bool outputsReady(const SortedVector< sp<OutputTrack> > &outputTracks); 1004 protected: 1005 // threadLoop snippets 1006 virtual void threadLoop_mix(); 1007 virtual void threadLoop_sleepTime(); 1008 virtual ssize_t threadLoop_write(); 1009 virtual void threadLoop_standby(); 1010 virtual void cacheParameters_l(); 1011 1012 private: 1013 // called from threadLoop, addOutputTrack, removeOutputTrack 1014 virtual void updateWaitTime_l(); 1015 protected: 1016 virtual void saveOutputTracks(); 1017 virtual void clearOutputTracks(); 1018 private: 1019 1020 uint32_t mWaitTimeMs; 1021 SortedVector < sp<OutputTrack> > outputTracks; 1022 SortedVector < sp<OutputTrack> > mOutputTracks; 1023 public: 1024 virtual bool hasFastMixer() const { return false; } 1025 }; 1026 1027 1028 // record thread 1029 class RecordThread : public ThreadBase 1030 { 1031 public: 1032 1033 class RecordTrack; 1034 class ResamplerBufferProvider : public AudioBufferProvider 1035 // derives from AudioBufferProvider interface for use by resampler 1036 { 1037 public: 1038 ResamplerBufferProvider(RecordTrack* recordTrack) : mRecordTrack(recordTrack) { } 1039 virtual ~ResamplerBufferProvider() { } 1040 // AudioBufferProvider interface 1041 virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer, int64_t pts); 1042 virtual void releaseBuffer(AudioBufferProvider::Buffer* buffer); 1043 private: 1044 RecordTrack * const mRecordTrack; 1045 }; 1046 1047 #include "RecordTracks.h" 1048 1049 RecordThread(const sp<AudioFlinger>& audioFlinger, 1050 AudioStreamIn *input, 1051 audio_io_handle_t id, 1052 audio_devices_t outDevice, 1053 audio_devices_t inDevice 1054 #ifdef TEE_SINK 1055 , const sp<NBAIO_Sink>& teeSink 1056 #endif 1057 ); 1058 virtual ~RecordThread(); 1059 1060 // no addTrack_l ? 1061 void destroyTrack_l(const sp<RecordTrack>& track); 1062 void removeTrack_l(const sp<RecordTrack>& track); 1063 1064 void dumpInternals(int fd, const Vector<String16>& args); 1065 void dumpTracks(int fd, const Vector<String16>& args); 1066 1067 // Thread virtuals 1068 virtual bool threadLoop(); 1069 1070 // RefBase 1071 virtual void onFirstRef(); 1072 1073 virtual status_t initCheck() const { return (mInput == NULL) ? NO_INIT : NO_ERROR; } 1074 1075 virtual sp<MemoryDealer> readOnlyHeap() const { return mReadOnlyHeap; } 1076 1077 virtual sp<IMemory> pipeMemory() const { return mPipeMemory; } 1078 1079 sp<AudioFlinger::RecordThread::RecordTrack> createRecordTrack_l( 1080 const sp<AudioFlinger::Client>& client, 1081 uint32_t sampleRate, 1082 audio_format_t format, 1083 audio_channel_mask_t channelMask, 1084 size_t *pFrameCount, 1085 int sessionId, 1086 size_t *notificationFrames, 1087 int uid, 1088 IAudioFlinger::track_flags_t *flags, 1089 pid_t tid, 1090 status_t *status /*non-NULL*/); 1091 1092 status_t start(RecordTrack* recordTrack, 1093 AudioSystem::sync_event_t event, 1094 int triggerSession); 1095 1096 // ask the thread to stop the specified track, and 1097 // return true if the caller should then do it's part of the stopping process 1098 bool stop(RecordTrack* recordTrack); 1099 1100 void dump(int fd, const Vector<String16>& args); 1101 AudioStreamIn* clearInput(); 1102 virtual audio_stream_t* stream() const; 1103 1104 1105 virtual bool checkForNewParameter_l(const String8& keyValuePair, 1106 status_t& status); 1107 virtual void cacheParameters_l() {} 1108 virtual String8 getParameters(const String8& keys); 1109 virtual void audioConfigChanged(int event, int param = 0); 1110 virtual status_t createAudioPatch_l(const struct audio_patch *patch, 1111 audio_patch_handle_t *handle); 1112 virtual status_t releaseAudioPatch_l(const audio_patch_handle_t handle); 1113 1114 void addPatchRecord(const sp<PatchRecord>& record); 1115 void deletePatchRecord(const sp<PatchRecord>& record); 1116 1117 void readInputParameters_l(); 1118 virtual uint32_t getInputFramesLost(); 1119 1120 virtual status_t addEffectChain_l(const sp<EffectChain>& chain); 1121 virtual size_t removeEffectChain_l(const sp<EffectChain>& chain); 1122 virtual uint32_t hasAudioSession(int sessionId) const; 1123 1124 // Return the set of unique session IDs across all tracks. 1125 // The keys are the session IDs, and the associated values are meaningless. 1126 // FIXME replace by Set [and implement Bag/Multiset for other uses]. 1127 KeyedVector<int, bool> sessionIds() const; 1128 1129 virtual status_t setSyncEvent(const sp<SyncEvent>& event); 1130 virtual bool isValidSyncEvent(const sp<SyncEvent>& event) const; 1131 1132 static void syncStartEventCallback(const wp<SyncEvent>& event); 1133 1134 virtual size_t frameCount() const { return mFrameCount; } 1135 bool hasFastCapture() const { return mFastCapture != 0; } 1136 virtual void getAudioPortConfig(struct audio_port_config *config); 1137 1138 private: 1139 // Enter standby if not already in standby, and set mStandby flag 1140 void standbyIfNotAlreadyInStandby(); 1141 1142 // Call the HAL standby method unconditionally, and don't change mStandby flag 1143 void inputStandBy(); 1144 1145 AudioStreamIn *mInput; 1146 SortedVector < sp<RecordTrack> > mTracks; 1147 // mActiveTracks has dual roles: it indicates the current active track(s), and 1148 // is used together with mStartStopCond to indicate start()/stop() progress 1149 SortedVector< sp<RecordTrack> > mActiveTracks; 1150 // generation counter for mActiveTracks 1151 int mActiveTracksGen; 1152 Condition mStartStopCond; 1153 1154 // resampler converts input at HAL Hz to output at AudioRecord client Hz 1155 int16_t *mRsmpInBuffer; // see new[] for details on the size 1156 size_t mRsmpInFrames; // size of resampler input in frames 1157 size_t mRsmpInFramesP2;// size rounded up to a power-of-2 1158 1159 // rolling index that is never cleared 1160 int32_t mRsmpInRear; // last filled frame + 1 1161 1162 // For dumpsys 1163 const sp<NBAIO_Sink> mTeeSink; 1164 1165 const sp<MemoryDealer> mReadOnlyHeap; 1166 1167 // one-time initialization, no locks required 1168 sp<FastCapture> mFastCapture; // non-0 if there is also a fast capture 1169 // FIXME audio watchdog thread 1170 1171 // contents are not guaranteed to be consistent, no locks required 1172 FastCaptureDumpState mFastCaptureDumpState; 1173 #ifdef STATE_QUEUE_DUMP 1174 // FIXME StateQueue observer and mutator dump fields 1175 #endif 1176 // FIXME audio watchdog dump 1177 1178 // accessible only within the threadLoop(), no locks required 1179 // mFastCapture->sq() // for mutating and pushing state 1180 int32_t mFastCaptureFutex; // for cold idle 1181 1182 // The HAL input source is treated as non-blocking, 1183 // but current implementation is blocking 1184 sp<NBAIO_Source> mInputSource; 1185 // The source for the normal capture thread to read from: mInputSource or mPipeSource 1186 sp<NBAIO_Source> mNormalSource; 1187 // If a fast capture is present, the non-blocking pipe sink written to by fast capture, 1188 // otherwise clear 1189 sp<NBAIO_Sink> mPipeSink; 1190 // If a fast capture is present, the non-blocking pipe source read by normal thread, 1191 // otherwise clear 1192 sp<NBAIO_Source> mPipeSource; 1193 // Depth of pipe from fast capture to normal thread and fast clients, always power of 2 1194 size_t mPipeFramesP2; 1195 // If a fast capture is present, the Pipe as IMemory, otherwise clear 1196 sp<IMemory> mPipeMemory; 1197 1198 static const size_t kFastCaptureLogSize = 4 * 1024; 1199 sp<NBLog::Writer> mFastCaptureNBLogWriter; 1200 1201 bool mFastTrackAvail; // true if fast track available 1202 }; 1203
