Threads.h revision 83b8808faad1e91690c64d7007348be8d9ebde73
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 22class ThreadBase : public Thread { 23public: 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 void disconnectEffect(const sp< EffectModule>& effect, 287 EffectHandle *handle, 288 bool unpinIfLast); 289 290 // return values for hasAudioSession (bit field) 291 enum effect_state { 292 EFFECT_SESSION = 0x1, // the audio session corresponds to at least one 293 // effect 294 TRACK_SESSION = 0x2 // the audio session corresponds to at least one 295 // track 296 }; 297 298 // get effect chain corresponding to session Id. 299 sp<EffectChain> getEffectChain(int sessionId); 300 // same as getEffectChain() but must be called with ThreadBase mutex locked 301 sp<EffectChain> getEffectChain_l(int sessionId) const; 302 // add an effect chain to the chain list (mEffectChains) 303 virtual status_t addEffectChain_l(const sp<EffectChain>& chain) = 0; 304 // remove an effect chain from the chain list (mEffectChains) 305 virtual size_t removeEffectChain_l(const sp<EffectChain>& chain) = 0; 306 // lock all effect chains Mutexes. Must be called before releasing the 307 // ThreadBase mutex before processing the mixer and effects. This guarantees the 308 // integrity of the chains during the process. 309 // Also sets the parameter 'effectChains' to current value of mEffectChains. 310 void lockEffectChains_l(Vector< sp<EffectChain> >& effectChains); 311 // unlock effect chains after process 312 void unlockEffectChains(const Vector< sp<EffectChain> >& effectChains); 313 // get a copy of mEffectChains vector 314 Vector< sp<EffectChain> > getEffectChains_l() const { return mEffectChains; }; 315 // set audio mode to all effect chains 316 void setMode(audio_mode_t mode); 317 // get effect module with corresponding ID on specified audio session 318 sp<AudioFlinger::EffectModule> getEffect(int sessionId, int effectId); 319 sp<AudioFlinger::EffectModule> getEffect_l(int sessionId, int effectId); 320 // add and effect module. Also creates the effect chain is none exists for 321 // the effects audio session 322 status_t addEffect_l(const sp< EffectModule>& effect); 323 // remove and effect module. Also removes the effect chain is this was the last 324 // effect 325 void removeEffect_l(const sp< EffectModule>& effect); 326 // detach all tracks connected to an auxiliary effect 327 virtual void detachAuxEffect_l(int effectId __unused) {} 328 // returns either EFFECT_SESSION if effects on this audio session exist in one 329 // chain, or TRACK_SESSION if tracks on this audio session exist, or both 330 virtual uint32_t hasAudioSession(int sessionId) const = 0; 331 // the value returned by default implementation is not important as the 332 // strategy is only meaningful for PlaybackThread which implements this method 333 virtual uint32_t getStrategyForSession_l(int sessionId __unused) { return 0; } 334 335 // suspend or restore effect according to the type of effect passed. a NULL 336 // type pointer means suspend all effects in the session 337 void setEffectSuspended(const effect_uuid_t *type, 338 bool suspend, 339 int sessionId = AUDIO_SESSION_OUTPUT_MIX); 340 // check if some effects must be suspended/restored when an effect is enabled 341 // or disabled 342 void checkSuspendOnEffectEnabled(const sp<EffectModule>& effect, 343 bool enabled, 344 int sessionId = AUDIO_SESSION_OUTPUT_MIX); 345 void checkSuspendOnEffectEnabled_l(const sp<EffectModule>& effect, 346 bool enabled, 347 int sessionId = AUDIO_SESSION_OUTPUT_MIX); 348 349 virtual status_t setSyncEvent(const sp<SyncEvent>& event) = 0; 350 virtual bool isValidSyncEvent(const sp<SyncEvent>& event) const = 0; 351 352 // Return a reference to a per-thread heap which can be used to allocate IMemory 353 // objects that will be read-only to client processes, read/write to mediaserver, 354 // and shared by all client processes of the thread. 355 // The heap is per-thread rather than common across all threads, because 356 // clients can't be trusted not to modify the offset of the IMemory they receive. 357 // If a thread does not have such a heap, this method returns 0. 358 virtual sp<MemoryDealer> readOnlyHeap() const { return 0; } 359 360 virtual sp<IMemory> pipeMemory() const { return 0; } 361 362 mutable Mutex mLock; 363 364protected: 365 366 // entry describing an effect being suspended in mSuspendedSessions keyed vector 367 class SuspendedSessionDesc : public RefBase { 368 public: 369 SuspendedSessionDesc() : mRefCount(0) {} 370 371 int mRefCount; // number of active suspend requests 372 effect_uuid_t mType; // effect type UUID 373 }; 374 375 void acquireWakeLock(int uid = -1); 376 void acquireWakeLock_l(int uid = -1); 377 void releaseWakeLock(); 378 void releaseWakeLock_l(); 379 void updateWakeLockUids(const SortedVector<int> &uids); 380 void updateWakeLockUids_l(const SortedVector<int> &uids); 381 void getPowerManager_l(); 382 void setEffectSuspended_l(const effect_uuid_t *type, 383 bool suspend, 384 int sessionId); 385 // updated mSuspendedSessions when an effect suspended or restored 386 void updateSuspendedSessions_l(const effect_uuid_t *type, 387 bool suspend, 388 int sessionId); 389 // check if some effects must be suspended when an effect chain is added 390 void checkSuspendOnAddEffectChain_l(const sp<EffectChain>& chain); 391 392 String16 getWakeLockTag(); 393 394 virtual void preExit() { } 395 396 friend class AudioFlinger; // for mEffectChains 397 398 const type_t mType; 399 400 // Used by parameters, config events, addTrack_l, exit 401 Condition mWaitWorkCV; 402 403 const sp<AudioFlinger> mAudioFlinger; 404 405 // updated by PlaybackThread::readOutputParameters_l() or 406 // RecordThread::readInputParameters_l() 407 uint32_t mSampleRate; 408 size_t mFrameCount; // output HAL, direct output, record 409 audio_channel_mask_t mChannelMask; 410 uint32_t mChannelCount; 411 size_t mFrameSize; 412 audio_format_t mFormat; // Source format for Recording and 413 // Sink format for Playback. 414 // Sink format may be different than 415 // HAL format if Fastmixer is used. 416 audio_format_t mHALFormat; 417 size_t mBufferSize; // HAL buffer size for read() or write() 418 419 Vector< sp<ConfigEvent> > mConfigEvents; 420 421 // These fields are written and read by thread itself without lock or barrier, 422 // and read by other threads without lock or barrier via standby(), outDevice() 423 // and inDevice(). 424 // Because of the absence of a lock or barrier, any other thread that reads 425 // these fields must use the information in isolation, or be prepared to deal 426 // with possibility that it might be inconsistent with other information. 427 bool mStandby; // Whether thread is currently in standby. 428 audio_devices_t mOutDevice; // output device 429 audio_devices_t mInDevice; // input device 430 audio_source_t mAudioSource; // (see audio.h, audio_source_t) 431 432 const audio_io_handle_t mId; 433 Vector< sp<EffectChain> > mEffectChains; 434 435 static const int kNameLength = 16; // prctl(PR_SET_NAME) limit 436 char mName[kNameLength]; 437 sp<IPowerManager> mPowerManager; 438 sp<IBinder> mWakeLockToken; 439 const sp<PMDeathRecipient> mDeathRecipient; 440 // list of suspended effects per session and per type. The first vector is 441 // keyed by session ID, the second by type UUID timeLow field 442 KeyedVector< int, KeyedVector< int, sp<SuspendedSessionDesc> > > 443 mSuspendedSessions; 444 static const size_t kLogSize = 4 * 1024; 445 sp<NBLog::Writer> mNBLogWriter; 446}; 447 448// --- PlaybackThread --- 449class PlaybackThread : public ThreadBase { 450public: 451 452#include "PlaybackTracks.h" 453 454 enum mixer_state { 455 MIXER_IDLE, // no active tracks 456 MIXER_TRACKS_ENABLED, // at least one active track, but no track has any data ready 457 MIXER_TRACKS_READY, // at least one active track, and at least one track has data 458 MIXER_DRAIN_TRACK, // drain currently playing track 459 MIXER_DRAIN_ALL, // fully drain the hardware 460 // standby mode does not have an enum value 461 // suspend by audio policy manager is orthogonal to mixer state 462 }; 463 464 // retry count before removing active track in case of underrun on offloaded thread: 465 // we need to make sure that AudioTrack client has enough time to send large buffers 466//FIXME may be more appropriate if expressed in time units. Need to revise how underrun is handled 467 // for offloaded tracks 468 static const int8_t kMaxTrackRetriesOffload = 20; 469 470 PlaybackThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, 471 audio_io_handle_t id, audio_devices_t device, type_t type); 472 virtual ~PlaybackThread(); 473 474 void dump(int fd, const Vector<String16>& args); 475 476 // Thread virtuals 477 virtual bool threadLoop(); 478 479 // RefBase 480 virtual void onFirstRef(); 481 482protected: 483 // Code snippets that were lifted up out of threadLoop() 484 virtual void threadLoop_mix() = 0; 485 virtual void threadLoop_sleepTime() = 0; 486 virtual ssize_t threadLoop_write(); 487 virtual void threadLoop_drain(); 488 virtual void threadLoop_standby(); 489 virtual void threadLoop_exit(); 490 virtual void threadLoop_removeTracks(const Vector< sp<Track> >& tracksToRemove); 491 492 // prepareTracks_l reads and writes mActiveTracks, and returns 493 // the pending set of tracks to remove via Vector 'tracksToRemove'. The caller 494 // is responsible for clearing or destroying this Vector later on, when it 495 // is safe to do so. That will drop the final ref count and destroy the tracks. 496 virtual mixer_state prepareTracks_l(Vector< sp<Track> > *tracksToRemove) = 0; 497 void removeTracks_l(const Vector< sp<Track> >& tracksToRemove); 498 499 void writeCallback(); 500 void resetWriteBlocked(uint32_t sequence); 501 void drainCallback(); 502 void resetDraining(uint32_t sequence); 503 504 static int asyncCallback(stream_callback_event_t event, void *param, void *cookie); 505 506 virtual bool waitingAsyncCallback(); 507 virtual bool waitingAsyncCallback_l(); 508 virtual bool shouldStandby_l(); 509 virtual void onAddNewTrack_l(); 510 511 // ThreadBase virtuals 512 virtual void preExit(); 513 514public: 515 516 virtual status_t initCheck() const { return (mOutput == NULL) ? NO_INIT : NO_ERROR; } 517 518 // return estimated latency in milliseconds, as reported by HAL 519 uint32_t latency() const; 520 // same, but lock must already be held 521 uint32_t latency_l() const; 522 523 void setMasterVolume(float value); 524 void setMasterMute(bool muted); 525 526 void setStreamVolume(audio_stream_type_t stream, float value); 527 void setStreamMute(audio_stream_type_t stream, bool muted); 528 529 float streamVolume(audio_stream_type_t stream) const; 530 531 sp<Track> createTrack_l( 532 const sp<AudioFlinger::Client>& client, 533 audio_stream_type_t streamType, 534 uint32_t sampleRate, 535 audio_format_t format, 536 audio_channel_mask_t channelMask, 537 size_t *pFrameCount, 538 const sp<IMemory>& sharedBuffer, 539 int sessionId, 540 IAudioFlinger::track_flags_t *flags, 541 pid_t tid, 542 int uid, 543 status_t *status /*non-NULL*/); 544 545 AudioStreamOut* getOutput() const; 546 AudioStreamOut* clearOutput(); 547 virtual audio_stream_t* stream() const; 548 549 // a very large number of suspend() will eventually wraparound, but unlikely 550 void suspend() { (void) android_atomic_inc(&mSuspended); } 551 void restore() 552 { 553 // if restore() is done without suspend(), get back into 554 // range so that the next suspend() will operate correctly 555 if (android_atomic_dec(&mSuspended) <= 0) { 556 android_atomic_release_store(0, &mSuspended); 557 } 558 } 559 bool isSuspended() const 560 { return android_atomic_acquire_load(&mSuspended) > 0; } 561 562 virtual String8 getParameters(const String8& keys); 563 virtual void audioConfigChanged(int event, int param = 0); 564 status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames); 565 // FIXME rename mixBuffer() to sinkBuffer() and remove int16_t* dependency. 566 // Consider also removing and passing an explicit mMainBuffer initialization 567 // parameter to AF::PlaybackThread::Track::Track(). 568 int16_t *mixBuffer() const { 569 return reinterpret_cast<int16_t *>(mSinkBuffer); }; 570 571 virtual void detachAuxEffect_l(int effectId); 572 status_t attachAuxEffect(const sp<AudioFlinger::PlaybackThread::Track> track, 573 int EffectId); 574 status_t attachAuxEffect_l(const sp<AudioFlinger::PlaybackThread::Track> track, 575 int EffectId); 576 577 virtual status_t addEffectChain_l(const sp<EffectChain>& chain); 578 virtual size_t removeEffectChain_l(const sp<EffectChain>& chain); 579 virtual uint32_t hasAudioSession(int sessionId) const; 580 virtual uint32_t getStrategyForSession_l(int sessionId); 581 582 583 virtual status_t setSyncEvent(const sp<SyncEvent>& event); 584 virtual bool isValidSyncEvent(const sp<SyncEvent>& event) const; 585 586 // called with AudioFlinger lock held 587 void invalidateTracks(audio_stream_type_t streamType); 588 589 virtual size_t frameCount() const { return mNormalFrameCount; } 590 591 // Return's the HAL's frame count i.e. fast mixer buffer size. 592 size_t frameCountHAL() const { return mFrameCount; } 593 594 status_t getTimestamp_l(AudioTimestamp& timestamp); 595 596 void addPatchTrack(const sp<PatchTrack>& track); 597 void deletePatchTrack(const sp<PatchTrack>& track); 598 599 virtual void getAudioPortConfig(struct audio_port_config *config); 600 601protected: 602 // updated by readOutputParameters_l() 603 size_t mNormalFrameCount; // normal mixer and effects 604 605 void* mSinkBuffer; // frame size aligned sink buffer 606 607 // TODO: 608 // Rearrange the buffer info into a struct/class with 609 // clear, copy, construction, destruction methods. 610 // 611 // mSinkBuffer also has associated with it: 612 // 613 // mSinkBufferSize: Sink Buffer Size 614 // mFormat: Sink Buffer Format 615 616 // Mixer Buffer (mMixerBuffer*) 617 // 618 // In the case of floating point or multichannel data, which is not in the 619 // sink format, it is required to accumulate in a higher precision or greater channel count 620 // buffer before downmixing or data conversion to the sink buffer. 621 622 // Set to "true" to enable the Mixer Buffer otherwise mixer output goes to sink buffer. 623 bool mMixerBufferEnabled; 624 625 // Storage, 32 byte aligned (may make this alignment a requirement later). 626 // Due to constraints on mNormalFrameCount, the buffer size is a multiple of 16 frames. 627 void* mMixerBuffer; 628 629 // Size of mMixerBuffer in bytes: mNormalFrameCount * #channels * sampsize. 630 size_t mMixerBufferSize; 631 632 // The audio format of mMixerBuffer. Set to AUDIO_FORMAT_PCM_(FLOAT|16_BIT) only. 633 audio_format_t mMixerBufferFormat; 634 635 // An internal flag set to true by MixerThread::prepareTracks_l() 636 // when mMixerBuffer contains valid data after mixing. 637 bool mMixerBufferValid; 638 639 // Effects Buffer (mEffectsBuffer*) 640 // 641 // In the case of effects data, which is not in the sink format, 642 // it is required to accumulate in a different buffer before data conversion 643 // to the sink buffer. 644 645 // Set to "true" to enable the Effects Buffer otherwise effects output goes to sink buffer. 646 bool mEffectBufferEnabled; 647 648 // Storage, 32 byte aligned (may make this alignment a requirement later). 649 // Due to constraints on mNormalFrameCount, the buffer size is a multiple of 16 frames. 650 void* mEffectBuffer; 651 652 // Size of mEffectsBuffer in bytes: mNormalFrameCount * #channels * sampsize. 653 size_t mEffectBufferSize; 654 655 // The audio format of mEffectsBuffer. Set to AUDIO_FORMAT_PCM_16_BIT only. 656 audio_format_t mEffectBufferFormat; 657 658 // An internal flag set to true by MixerThread::prepareTracks_l() 659 // when mEffectsBuffer contains valid data after mixing. 660 // 661 // When this is set, all mixer data is routed into the effects buffer 662 // for any processing (including output processing). 663 bool mEffectBufferValid; 664 665 // suspend count, > 0 means suspended. While suspended, the thread continues to pull from 666 // tracks and mix, but doesn't write to HAL. A2DP and SCO HAL implementations can't handle 667 // concurrent use of both of them, so Audio Policy Service suspends one of the threads to 668 // workaround that restriction. 669 // 'volatile' means accessed via atomic operations and no lock. 670 volatile int32_t mSuspended; 671 672 // FIXME overflows every 6+ hours at 44.1 kHz stereo 16-bit samples 673 // mFramesWritten would be better, or 64-bit even better 674 size_t mBytesWritten; 675private: 676 // mMasterMute is in both PlaybackThread and in AudioFlinger. When a 677 // PlaybackThread needs to find out if master-muted, it checks it's local 678 // copy rather than the one in AudioFlinger. This optimization saves a lock. 679 bool mMasterMute; 680 void setMasterMute_l(bool muted) { mMasterMute = muted; } 681protected: 682 SortedVector< wp<Track> > mActiveTracks; // FIXME check if this could be sp<> 683 SortedVector<int> mWakeLockUids; 684 int mActiveTracksGeneration; 685 wp<Track> mLatestActiveTrack; // latest track added to mActiveTracks 686 687 // Allocate a track name for a given channel mask. 688 // Returns name >= 0 if successful, -1 on failure. 689 virtual int getTrackName_l(audio_channel_mask_t channelMask, 690 audio_format_t format, int sessionId) = 0; 691 virtual void deleteTrackName_l(int name) = 0; 692 693 // Time to sleep between cycles when: 694 virtual uint32_t activeSleepTimeUs() const; // mixer state MIXER_TRACKS_ENABLED 695 virtual uint32_t idleSleepTimeUs() const = 0; // mixer state MIXER_IDLE 696 virtual uint32_t suspendSleepTimeUs() const = 0; // audio policy manager suspended us 697 // No sleep when mixer state == MIXER_TRACKS_READY; relies on audio HAL stream->write() 698 // No sleep in standby mode; waits on a condition 699 700 // Code snippets that are temporarily lifted up out of threadLoop() until the merge 701 void checkSilentMode_l(); 702 703 // Non-trivial for DUPLICATING only 704 virtual void saveOutputTracks() { } 705 virtual void clearOutputTracks() { } 706 707 // Cache various calculated values, at threadLoop() entry and after a parameter change 708 virtual void cacheParameters_l(); 709 710 virtual uint32_t correctLatency_l(uint32_t latency) const; 711 712 virtual status_t createAudioPatch_l(const struct audio_patch *patch, 713 audio_patch_handle_t *handle); 714 virtual status_t releaseAudioPatch_l(const audio_patch_handle_t handle); 715 716private: 717 718 friend class AudioFlinger; // for numerous 719 720 PlaybackThread& operator = (const PlaybackThread&); 721 722 status_t addTrack_l(const sp<Track>& track); 723 bool destroyTrack_l(const sp<Track>& track); 724 void removeTrack_l(const sp<Track>& track); 725 void broadcast_l(); 726 727 void readOutputParameters_l(); 728 729 virtual void dumpInternals(int fd, const Vector<String16>& args); 730 void dumpTracks(int fd, const Vector<String16>& args); 731 732 SortedVector< sp<Track> > mTracks; 733 // mStreamTypes[] uses 1 additional stream type internally for the OutputTrack used by 734 // DuplicatingThread 735 stream_type_t mStreamTypes[AUDIO_STREAM_CNT + 1]; 736 AudioStreamOut *mOutput; 737 738 float mMasterVolume; 739 nsecs_t mLastWriteTime; 740 int mNumWrites; 741 int mNumDelayedWrites; 742 bool mInWrite; 743 744 // FIXME rename these former local variables of threadLoop to standard "m" names 745 nsecs_t standbyTime; 746 size_t mSinkBufferSize; 747 748 // cached copies of activeSleepTimeUs() and idleSleepTimeUs() made by cacheParameters_l() 749 uint32_t activeSleepTime; 750 uint32_t idleSleepTime; 751 752 uint32_t sleepTime; 753 754 // mixer status returned by prepareTracks_l() 755 mixer_state mMixerStatus; // current cycle 756 // previous cycle when in prepareTracks_l() 757 mixer_state mMixerStatusIgnoringFastTracks; 758 // FIXME or a separate ready state per track 759 760 // FIXME move these declarations into the specific sub-class that needs them 761 // MIXER only 762 uint32_t sleepTimeShift; 763 764 // same as AudioFlinger::mStandbyTimeInNsecs except for DIRECT which uses a shorter value 765 nsecs_t standbyDelay; 766 767 // MIXER only 768 nsecs_t maxPeriod; 769 770 // DUPLICATING only 771 uint32_t writeFrames; 772 773 size_t mBytesRemaining; 774 size_t mCurrentWriteLength; 775 bool mUseAsyncWrite; 776 // mWriteAckSequence contains current write sequence on bits 31-1. The write sequence is 777 // incremented each time a write(), a flush() or a standby() occurs. 778 // Bit 0 is set when a write blocks and indicates a callback is expected. 779 // Bit 0 is reset by the async callback thread calling resetWriteBlocked(). Out of sequence 780 // callbacks are ignored. 781 uint32_t mWriteAckSequence; 782 // mDrainSequence contains current drain sequence on bits 31-1. The drain sequence is 783 // incremented each time a drain is requested or a flush() or standby() occurs. 784 // Bit 0 is set when the drain() command is called at the HAL and indicates a callback is 785 // expected. 786 // Bit 0 is reset by the async callback thread calling resetDraining(). Out of sequence 787 // callbacks are ignored. 788 uint32_t mDrainSequence; 789 // A condition that must be evaluated by prepareTrack_l() has changed and we must not wait 790 // for async write callback in the thread loop before evaluating it 791 bool mSignalPending; 792 sp<AsyncCallbackThread> mCallbackThread; 793 794private: 795 // The HAL output sink is treated as non-blocking, but current implementation is blocking 796 sp<NBAIO_Sink> mOutputSink; 797 // If a fast mixer is present, the blocking pipe sink, otherwise clear 798 sp<NBAIO_Sink> mPipeSink; 799 // The current sink for the normal mixer to write it's (sub)mix, mOutputSink or mPipeSink 800 sp<NBAIO_Sink> mNormalSink; 801#ifdef TEE_SINK 802 // For dumpsys 803 sp<NBAIO_Sink> mTeeSink; 804 sp<NBAIO_Source> mTeeSource; 805#endif 806 uint32_t mScreenState; // cached copy of gScreenState 807 static const size_t kFastMixerLogSize = 4 * 1024; 808 sp<NBLog::Writer> mFastMixerNBLogWriter; 809public: 810 virtual bool hasFastMixer() const = 0; 811 virtual FastTrackUnderruns getFastTrackUnderruns(size_t fastIndex __unused) const 812 { FastTrackUnderruns dummy; return dummy; } 813 814protected: 815 // accessed by both binder threads and within threadLoop(), lock on mutex needed 816 unsigned mFastTrackAvailMask; // bit i set if fast track [i] is available 817 818private: 819 // timestamp latch: 820 // D input is written by threadLoop_write while mutex is unlocked, and read while locked 821 // Q output is written while locked, and read while locked 822 struct { 823 AudioTimestamp mTimestamp; 824 uint32_t mUnpresentedFrames; 825 } mLatchD, mLatchQ; 826 bool mLatchDValid; // true means mLatchD is valid, and clock it into latch at next opportunity 827 bool mLatchQValid; // true means mLatchQ is valid 828}; 829 830class MixerThread : public PlaybackThread { 831public: 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 845protected: 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 863private: 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 880public: 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 889class DirectOutputThread : public PlaybackThread { 890public: 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 901protected: 902 virtual int getTrackName_l(audio_channel_mask_t channelMask, 903 audio_format_t format, int sessionId); 904 virtual void deleteTrackName_l(int name); 905 virtual uint32_t activeSleepTimeUs() const; 906 virtual uint32_t idleSleepTimeUs() const; 907 virtual uint32_t suspendSleepTimeUs() const; 908 virtual void cacheParameters_l(); 909 910 // threadLoop snippets 911 virtual mixer_state prepareTracks_l(Vector< sp<Track> > *tracksToRemove); 912 virtual void threadLoop_mix(); 913 virtual void threadLoop_sleepTime(); 914 915 // volumes last sent to audio HAL with stream->set_volume() 916 float mLeftVolFloat; 917 float mRightVolFloat; 918 919 DirectOutputThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, 920 audio_io_handle_t id, uint32_t device, ThreadBase::type_t type); 921 void processVolume_l(Track *track, bool lastTrack); 922 923 // prepareTracks_l() tells threadLoop_mix() the name of the single active track 924 sp<Track> mActiveTrack; 925public: 926 virtual bool hasFastMixer() const { return false; } 927}; 928 929class OffloadThread : public DirectOutputThread { 930public: 931 932 OffloadThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, 933 audio_io_handle_t id, uint32_t device); 934 virtual ~OffloadThread() {}; 935 936protected: 937 // threadLoop snippets 938 virtual mixer_state prepareTracks_l(Vector< sp<Track> > *tracksToRemove); 939 virtual void threadLoop_exit(); 940 941 virtual bool waitingAsyncCallback(); 942 virtual bool waitingAsyncCallback_l(); 943 virtual bool shouldStandby_l(); 944 virtual void onAddNewTrack_l(); 945 946private: 947 void flushHw_l(); 948 949private: 950 bool mHwPaused; 951 bool mFlushPending; 952 size_t mPausedWriteLength; // length in bytes of write interrupted by pause 953 size_t mPausedBytesRemaining; // bytes still waiting in mixbuffer after resume 954 wp<Track> mPreviousTrack; // used to detect track switch 955}; 956 957class AsyncCallbackThread : public Thread { 958public: 959 960 AsyncCallbackThread(const wp<PlaybackThread>& playbackThread); 961 962 virtual ~AsyncCallbackThread(); 963 964 // Thread virtuals 965 virtual bool threadLoop(); 966 967 // RefBase 968 virtual void onFirstRef(); 969 970 void exit(); 971 void setWriteBlocked(uint32_t sequence); 972 void resetWriteBlocked(); 973 void setDraining(uint32_t sequence); 974 void resetDraining(); 975 976private: 977 const wp<PlaybackThread> mPlaybackThread; 978 // mWriteAckSequence corresponds to the last write sequence passed by the offload thread via 979 // setWriteBlocked(). The sequence is shifted one bit to the left and the lsb is used 980 // to indicate that the callback has been received via resetWriteBlocked() 981 uint32_t mWriteAckSequence; 982 // mDrainSequence corresponds to the last drain sequence passed by the offload thread via 983 // setDraining(). The sequence is shifted one bit to the left and the lsb is used 984 // to indicate that the callback has been received via resetDraining() 985 uint32_t mDrainSequence; 986 Condition mWaitWorkCV; 987 Mutex mLock; 988}; 989 990class DuplicatingThread : public MixerThread { 991public: 992 DuplicatingThread(const sp<AudioFlinger>& audioFlinger, MixerThread* mainThread, 993 audio_io_handle_t id); 994 virtual ~DuplicatingThread(); 995 996 // Thread virtuals 997 void addOutputTrack(MixerThread* thread); 998 void removeOutputTrack(MixerThread* thread); 999 uint32_t waitTimeMs() const { return mWaitTimeMs; } 1000protected: 1001 virtual uint32_t activeSleepTimeUs() const; 1002 1003private: 1004 bool outputsReady(const SortedVector< sp<OutputTrack> > &outputTracks); 1005protected: 1006 // threadLoop snippets 1007 virtual void threadLoop_mix(); 1008 virtual void threadLoop_sleepTime(); 1009 virtual ssize_t threadLoop_write(); 1010 virtual void threadLoop_standby(); 1011 virtual void cacheParameters_l(); 1012 1013private: 1014 // called from threadLoop, addOutputTrack, removeOutputTrack 1015 virtual void updateWaitTime_l(); 1016protected: 1017 virtual void saveOutputTracks(); 1018 virtual void clearOutputTracks(); 1019private: 1020 1021 uint32_t mWaitTimeMs; 1022 SortedVector < sp<OutputTrack> > outputTracks; 1023 SortedVector < sp<OutputTrack> > mOutputTracks; 1024public: 1025 virtual bool hasFastMixer() const { return false; } 1026}; 1027 1028 1029// record thread 1030class RecordThread : public ThreadBase 1031{ 1032public: 1033 1034 class RecordTrack; 1035 class ResamplerBufferProvider : public AudioBufferProvider 1036 // derives from AudioBufferProvider interface for use by resampler 1037 { 1038 public: 1039 ResamplerBufferProvider(RecordTrack* recordTrack) : mRecordTrack(recordTrack) { } 1040 virtual ~ResamplerBufferProvider() { } 1041 // AudioBufferProvider interface 1042 virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer, int64_t pts); 1043 virtual void releaseBuffer(AudioBufferProvider::Buffer* buffer); 1044 private: 1045 RecordTrack * const mRecordTrack; 1046 }; 1047 1048#include "RecordTracks.h" 1049 1050 RecordThread(const sp<AudioFlinger>& audioFlinger, 1051 AudioStreamIn *input, 1052 audio_io_handle_t id, 1053 audio_devices_t outDevice, 1054 audio_devices_t inDevice 1055#ifdef TEE_SINK 1056 , const sp<NBAIO_Sink>& teeSink 1057#endif 1058 ); 1059 virtual ~RecordThread(); 1060 1061 // no addTrack_l ? 1062 void destroyTrack_l(const sp<RecordTrack>& track); 1063 void removeTrack_l(const sp<RecordTrack>& track); 1064 1065 void dumpInternals(int fd, const Vector<String16>& args); 1066 void dumpTracks(int fd, const Vector<String16>& args); 1067 1068 // Thread virtuals 1069 virtual bool threadLoop(); 1070 1071 // RefBase 1072 virtual void onFirstRef(); 1073 1074 virtual status_t initCheck() const { return (mInput == NULL) ? NO_INIT : NO_ERROR; } 1075 1076 virtual sp<MemoryDealer> readOnlyHeap() const { return mReadOnlyHeap; } 1077 1078 virtual sp<IMemory> pipeMemory() const { return mPipeMemory; } 1079 1080 sp<AudioFlinger::RecordThread::RecordTrack> createRecordTrack_l( 1081 const sp<AudioFlinger::Client>& client, 1082 uint32_t sampleRate, 1083 audio_format_t format, 1084 audio_channel_mask_t channelMask, 1085 size_t *pFrameCount, 1086 int sessionId, 1087 size_t *notificationFrames, 1088 int uid, 1089 IAudioFlinger::track_flags_t *flags, 1090 pid_t tid, 1091 status_t *status /*non-NULL*/); 1092 1093 status_t start(RecordTrack* recordTrack, 1094 AudioSystem::sync_event_t event, 1095 int triggerSession); 1096 1097 // ask the thread to stop the specified track, and 1098 // return true if the caller should then do it's part of the stopping process 1099 bool stop(RecordTrack* recordTrack); 1100 1101 void dump(int fd, const Vector<String16>& args); 1102 AudioStreamIn* clearInput(); 1103 virtual audio_stream_t* stream() const; 1104 1105 1106 virtual bool checkForNewParameter_l(const String8& keyValuePair, 1107 status_t& status); 1108 virtual void cacheParameters_l() {} 1109 virtual String8 getParameters(const String8& keys); 1110 virtual void audioConfigChanged(int event, int param = 0); 1111 virtual status_t createAudioPatch_l(const struct audio_patch *patch, 1112 audio_patch_handle_t *handle); 1113 virtual status_t releaseAudioPatch_l(const audio_patch_handle_t handle); 1114 1115 void addPatchRecord(const sp<PatchRecord>& record); 1116 void deletePatchRecord(const sp<PatchRecord>& record); 1117 1118 void readInputParameters_l(); 1119 virtual uint32_t getInputFramesLost(); 1120 1121 virtual status_t addEffectChain_l(const sp<EffectChain>& chain); 1122 virtual size_t removeEffectChain_l(const sp<EffectChain>& chain); 1123 virtual uint32_t hasAudioSession(int sessionId) const; 1124 1125 // Return the set of unique session IDs across all tracks. 1126 // The keys are the session IDs, and the associated values are meaningless. 1127 // FIXME replace by Set [and implement Bag/Multiset for other uses]. 1128 KeyedVector<int, bool> sessionIds() const; 1129 1130 virtual status_t setSyncEvent(const sp<SyncEvent>& event); 1131 virtual bool isValidSyncEvent(const sp<SyncEvent>& event) const; 1132 1133 static void syncStartEventCallback(const wp<SyncEvent>& event); 1134 1135 virtual size_t frameCount() const { return mFrameCount; } 1136 bool hasFastCapture() const { return mFastCapture != 0; } 1137 virtual void getAudioPortConfig(struct audio_port_config *config); 1138 1139private: 1140 // Enter standby if not already in standby, and set mStandby flag 1141 void standbyIfNotAlreadyInStandby(); 1142 1143 // Call the HAL standby method unconditionally, and don't change mStandby flag 1144 void inputStandBy(); 1145 1146 AudioStreamIn *mInput; 1147 SortedVector < sp<RecordTrack> > mTracks; 1148 // mActiveTracks has dual roles: it indicates the current active track(s), and 1149 // is used together with mStartStopCond to indicate start()/stop() progress 1150 SortedVector< sp<RecordTrack> > mActiveTracks; 1151 // generation counter for mActiveTracks 1152 int mActiveTracksGen; 1153 Condition mStartStopCond; 1154 1155 // resampler converts input at HAL Hz to output at AudioRecord client Hz 1156 int16_t *mRsmpInBuffer; // see new[] for details on the size 1157 size_t mRsmpInFrames; // size of resampler input in frames 1158 size_t mRsmpInFramesP2;// size rounded up to a power-of-2 1159 1160 // rolling index that is never cleared 1161 int32_t mRsmpInRear; // last filled frame + 1 1162 1163 // For dumpsys 1164 const sp<NBAIO_Sink> mTeeSink; 1165 1166 const sp<MemoryDealer> mReadOnlyHeap; 1167 1168 // one-time initialization, no locks required 1169 sp<FastCapture> mFastCapture; // non-0 if there is also a fast capture 1170 // FIXME audio watchdog thread 1171 1172 // contents are not guaranteed to be consistent, no locks required 1173 FastCaptureDumpState mFastCaptureDumpState; 1174#ifdef STATE_QUEUE_DUMP 1175 // FIXME StateQueue observer and mutator dump fields 1176#endif 1177 // FIXME audio watchdog dump 1178 1179 // accessible only within the threadLoop(), no locks required 1180 // mFastCapture->sq() // for mutating and pushing state 1181 int32_t mFastCaptureFutex; // for cold idle 1182 1183 // The HAL input source is treated as non-blocking, 1184 // but current implementation is blocking 1185 sp<NBAIO_Source> mInputSource; 1186 // The source for the normal capture thread to read from: mInputSource or mPipeSource 1187 sp<NBAIO_Source> mNormalSource; 1188 // If a fast capture is present, the non-blocking pipe sink written to by fast capture, 1189 // otherwise clear 1190 sp<NBAIO_Sink> mPipeSink; 1191 // If a fast capture is present, the non-blocking pipe source read by normal thread, 1192 // otherwise clear 1193 sp<NBAIO_Source> mPipeSource; 1194 // Depth of pipe from fast capture to normal thread and fast clients, always power of 2 1195 size_t mPipeFramesP2; 1196 // If a fast capture is present, the Pipe as IMemory, otherwise clear 1197 sp<IMemory> mPipeMemory; 1198 1199 static const size_t kFastCaptureLogSize = 4 * 1024; 1200 sp<NBLog::Writer> mFastCaptureNBLogWriter; 1201 1202 bool mFastTrackAvail; // true if fast track available 1203}; 1204