android_GenericPlayer.cpp revision a9f22e6f5f53e90daa779e38b22f88e4faa35c95
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17//#define USE_LOG SLAndroidLogLevel_Verbose 18 19#include "sles_allinclusive.h" 20 21#include <media/stagefright/foundation/ADebug.h> 22#include <sys/stat.h> 23 24namespace android { 25 26//-------------------------------------------------------------------------------------------------- 27GenericPlayer::GenericPlayer(const AudioPlayback_Parameters* params) : 28 mDataLocatorType(kDataLocatorNone), 29 mNotifyClient(NULL), 30 mNotifyUser(NULL), 31 mStateFlags(0), 32 mPlaybackParams(*params), 33 mChannelCount(UNKNOWN_NUMCHANNELS), 34 mDurationMsec(ANDROID_UNKNOWN_TIME), 35 mSampleRateHz(UNKNOWN_SAMPLERATE), 36 mCacheStatus(kStatusEmpty), 37 mCacheFill(0), 38 mLastNotifiedCacheFill(0), 39 mCacheFillNotifThreshold(100), 40 mEventFlags(0), 41 mMarkerPositionMs(ANDROID_UNKNOWN_TIME), 42 mPositionUpdatePeriodMs(1000), // per spec 43 mOneShotGeneration(0), 44 mDeliveredNewPosMs(ANDROID_UNKNOWN_TIME), 45 mObservedPositionMs(ANDROID_UNKNOWN_TIME) 46{ 47 SL_LOGD("GenericPlayer::GenericPlayer()"); 48 49 mLooper = new android::ALooper(); 50 51 mAndroidAudioLevels.mFinalVolume[0] = 1.0f; 52 mAndroidAudioLevels.mFinalVolume[1] = 1.0f; 53} 54 55 56GenericPlayer::~GenericPlayer() { 57 SL_LOGV("GenericPlayer::~GenericPlayer()"); 58 59 resetDataLocator(); 60} 61 62 63void GenericPlayer::init(const notif_cbf_t cbf, void* notifUser) { 64 SL_LOGD("GenericPlayer::init()"); 65 66 { 67 android::Mutex::Autolock autoLock(mNotifyClientLock); 68 mNotifyClient = cbf; 69 mNotifyUser = notifUser; 70 } 71 72 mLooper->registerHandler(this); 73 mLooper->start(false /*runOnCallingThread*/, false /*canCallJava*/, PRIORITY_DEFAULT); 74} 75 76 77void GenericPlayer::preDestroy() { 78 SL_LOGD("GenericPlayer::preDestroy()"); 79 { 80 android::Mutex::Autolock autoLock(mNotifyClientLock); 81 mNotifyClient = NULL; 82 mNotifyUser = NULL; 83 } 84 85 mLooper->stop(); 86 mLooper->unregisterHandler(id()); 87} 88 89 90void GenericPlayer::setDataSource(const char *uri) { 91 SL_LOGV("GenericPlayer::setDataSource(uri=%s)", uri); 92 resetDataLocator(); 93 94 mDataLocator.uriRef = uri; 95 96 mDataLocatorType = kDataLocatorUri; 97} 98 99 100void GenericPlayer::setDataSource(int fd, int64_t offset, int64_t length, bool closeAfterUse) { 101 SL_LOGV("GenericPlayer::setDataSource(fd=%d, offset=%lld, length=%lld, closeAfterUse=%s)", fd, 102 offset, length, closeAfterUse ? "true" : "false"); 103 resetDataLocator(); 104 105 mDataLocator.fdi.fd = fd; 106 107 struct stat sb; 108 int ret = fstat(fd, &sb); 109 if (ret != 0) { 110 SL_LOGE("GenericPlayer::setDataSource: fstat(%d) failed: %d, %s", fd, ret, strerror(errno)); 111 return; 112 } 113 114 if (offset >= sb.st_size) { 115 SL_LOGE("SfPlayer::setDataSource: invalid offset"); 116 return; 117 } 118 mDataLocator.fdi.offset = offset; 119 120 if (PLAYER_FD_FIND_FILE_SIZE == length) { 121 mDataLocator.fdi.length = sb.st_size; 122 } else if (offset + length > sb.st_size) { 123 mDataLocator.fdi.length = sb.st_size - offset; 124 } else { 125 mDataLocator.fdi.length = length; 126 } 127 128 mDataLocator.fdi.mCloseAfterUse = closeAfterUse; 129 130 mDataLocatorType = kDataLocatorFd; 131} 132 133 134void GenericPlayer::prepare() { 135 SL_LOGD("GenericPlayer::prepare()"); 136 // do not attempt prepare more than once 137 if (!(mStateFlags & (kFlagPrepared | kFlagPreparedUnsuccessfully))) { 138 sp<AMessage> msg = new AMessage(kWhatPrepare, id()); 139 msg->post(); 140 } 141} 142 143 144void GenericPlayer::play() { 145 SL_LOGD("GenericPlayer::play()"); 146 sp<AMessage> msg = new AMessage(kWhatPlay, id()); 147 msg->post(); 148} 149 150 151void GenericPlayer::pause() { 152 SL_LOGD("GenericPlayer::pause()"); 153 sp<AMessage> msg = new AMessage(kWhatPause, id()); 154 msg->post(); 155} 156 157 158void GenericPlayer::stop() { 159 SL_LOGD("GenericPlayer::stop()"); 160 (new AMessage(kWhatPause, id()))->post(); 161 162 // after a stop, playback should resume from the start. 163 seek(0); 164} 165 166 167void GenericPlayer::seek(int64_t timeMsec) { 168 SL_LOGV("GenericPlayer::seek %lld", timeMsec); 169 if (timeMsec < 0 && timeMsec != ANDROID_UNKNOWN_TIME) { 170 SL_LOGE("GenericPlayer::seek error, can't seek to negative time %lldms", timeMsec); 171 return; 172 } 173 sp<AMessage> msg = new AMessage(kWhatSeek, id()); 174 msg->setInt64(WHATPARAM_SEEK_SEEKTIME_MS, timeMsec); 175 msg->post(); 176} 177 178 179void GenericPlayer::loop(bool loop) { 180 SL_LOGV("GenericPlayer::loop %s", loop ? "true" : "false"); 181 sp<AMessage> msg = new AMessage(kWhatLoop, id()); 182 msg->setInt32(WHATPARAM_LOOP_LOOPING, (int32_t)loop); 183 msg->post(); 184} 185 186 187void GenericPlayer::setBufferingUpdateThreshold(int16_t thresholdPercent) { 188 SL_LOGV("GenericPlayer::setBufferingUpdateThreshold %d", thresholdPercent); 189 sp<AMessage> msg = new AMessage(kWhatBuffUpdateThres, id()); 190 msg->setInt32(WHATPARAM_BUFFERING_UPDATETHRESHOLD_PERCENT, (int32_t)thresholdPercent); 191 msg->post(); 192} 193 194 195//-------------------------------------------------- 196void GenericPlayer::getDurationMsec(int* msec) { 197 *msec = mDurationMsec; 198} 199 200void GenericPlayer::getSampleRate(uint* hz) { 201 *hz = mSampleRateHz; 202} 203 204//-------------------------------------------------- 205void GenericPlayer::setVolume(float leftVol, float rightVol) 206{ 207 { 208 Mutex::Autolock _l(mSettingsLock); 209 mAndroidAudioLevels.mFinalVolume[0] = leftVol; 210 mAndroidAudioLevels.mFinalVolume[1] = rightVol; 211 } 212 // send a message for the volume to be updated by the object which implements the volume 213 (new AMessage(kWhatVolumeUpdate, id()))->post(); 214} 215 216 217//-------------------------------------------------- 218void GenericPlayer::attachAuxEffect(int32_t effectId) 219{ 220 SL_LOGV("GenericPlayer::attachAuxEffect(id=%d)", effectId); 221 sp<AMessage> msg = new AMessage(kWhatAttachAuxEffect, id()); 222 msg->setInt32(WHATPARAM_ATTACHAUXEFFECT, effectId); 223 msg->post(); 224} 225 226 227//-------------------------------------------------- 228void GenericPlayer::setAuxEffectSendLevel(float level) 229{ 230 SL_LOGV("GenericPlayer::setAuxEffectSendLevel(level=%g)", level); 231 sp<AMessage> msg = new AMessage(kWhatSetAuxEffectSendLevel, id()); 232 msg->setFloat(WHATPARAM_SETAUXEFFECTSENDLEVEL, level); 233 msg->post(); 234} 235 236 237//-------------------------------------------------- 238// Call after changing any of the IPlay settings related to SL_PLAYEVENT_* 239void GenericPlayer::setPlayEvents(int32_t eventFlags, int32_t markerPositionMs, 240 int32_t positionUpdatePeriodMs) 241{ 242 // Normalize ms that are within the valid unsigned range, but not in the int32_t range 243 if (markerPositionMs < 0) { 244 markerPositionMs = ANDROID_UNKNOWN_TIME; 245 } 246 if (positionUpdatePeriodMs < 0) { 247 positionUpdatePeriodMs = ANDROID_UNKNOWN_TIME; 248 } 249 // markers are delivered accurately, but new position updates are limited to every 100 ms 250 if (positionUpdatePeriodMs < 100) { 251 positionUpdatePeriodMs = 100; 252 } 253 sp<AMessage> msg = new AMessage(kWhatSetPlayEvents, id()); 254 msg->setInt32(WHATPARAM_SETPLAYEVENTS_FLAGS, eventFlags); 255 msg->setInt32(WHATPARAM_SETPLAYEVENTS_MARKER, markerPositionMs); 256 msg->setInt32(WHATPARAM_SETPLAYEVENTS_UPDATE, positionUpdatePeriodMs); 257 msg->post(); 258} 259 260 261//-------------------------------------------------- 262/* 263 * post-condition: mDataLocatorType == kDataLocatorNone 264 * 265 */ 266void GenericPlayer::resetDataLocator() { 267 SL_LOGV("GenericPlayer::resetDataLocator()"); 268 if (mDataLocatorType == kDataLocatorFd && mDataLocator.fdi.mCloseAfterUse) { 269 (void) ::close(mDataLocator.fdi.fd); 270 // would be redundant, as we're about to invalidate the union mDataLocator 271 //mDataLocator.fdi.fd = -1; 272 //mDataLocator.fdi.mCloseAfterUse = false; 273 } 274 mDataLocatorType = kDataLocatorNone; 275} 276 277 278void GenericPlayer::notify(const char* event, int data, bool async) { 279 SL_LOGV("GenericPlayer::notify(event=%s, data=%d, async=%s)", event, data, 280 async ? "true" : "false"); 281 sp<AMessage> msg = new AMessage(kWhatNotif, id()); 282 msg->setInt32(event, (int32_t)data); 283 if (async) { 284 msg->post(); 285 } else { 286 this->onNotify(msg); 287 } 288} 289 290 291void GenericPlayer::notify(const char* event, int data1, int data2, bool async) { 292 SL_LOGV("GenericPlayer::notify(event=%s, data1=%d, data2=%d, async=%s)", event, data1, data2, 293 async ? "true" : "false"); 294 sp<AMessage> msg = new AMessage(kWhatNotif, id()); 295 msg->setRect(event, 0, 0, (int32_t)data1, (int32_t)data2); 296 if (async) { 297 msg->post(); 298 } else { 299 this->onNotify(msg); 300 } 301} 302 303 304//-------------------------------------------------- 305// AHandler implementation 306void GenericPlayer::onMessageReceived(const sp<AMessage> &msg) { 307 SL_LOGV("GenericPlayer::onMessageReceived()"); 308 switch (msg->what()) { 309 case kWhatPrepare: 310 SL_LOGV("kWhatPrepare"); 311 onPrepare(); 312 break; 313 314 case kWhatNotif: 315 SL_LOGV("kWhatNotif"); 316 onNotify(msg); 317 break; 318 319 case kWhatPlay: 320 SL_LOGV("kWhatPlay"); 321 onPlay(); 322 break; 323 324 case kWhatPause: 325 SL_LOGV("kWhatPause"); 326 onPause(); 327 break; 328 329 case kWhatSeek: 330 SL_LOGV("kWhatSeek"); 331 onSeek(msg); 332 break; 333 334 case kWhatLoop: 335 SL_LOGV("kWhatLoop"); 336 onLoop(msg); 337 break; 338 339 case kWhatVolumeUpdate: 340 SL_LOGV("kWhatVolumeUpdate"); 341 onVolumeUpdate(); 342 break; 343 344 case kWhatSeekComplete: 345 SL_LOGV("kWhatSeekComplete"); 346 onSeekComplete(); 347 break; 348 349 case kWhatBufferingUpdate: 350 SL_LOGV("kWhatBufferingUpdate"); 351 onBufferingUpdate(msg); 352 break; 353 354 case kWhatBuffUpdateThres: 355 SL_LOGV("kWhatBuffUpdateThres"); 356 onSetBufferingUpdateThreshold(msg); 357 break; 358 359 case kWhatAttachAuxEffect: 360 SL_LOGV("kWhatAttachAuxEffect"); 361 onAttachAuxEffect(msg); 362 break; 363 364 case kWhatSetAuxEffectSendLevel: 365 SL_LOGV("kWhatSetAuxEffectSendLevel"); 366 onSetAuxEffectSendLevel(msg); 367 break; 368 369 case kWhatSetPlayEvents: 370 SL_LOGV("kWhatSetPlayEvents"); 371 onSetPlayEvents(msg); 372 break; 373 374 case kWhatOneShot: 375 SL_LOGV("kWhatOneShot"); 376 onOneShot(msg); 377 break; 378 379 default: 380 SL_LOGE("GenericPlayer::onMessageReceived unknown message %d", msg->what()); 381 TRESPASS(); 382 } 383} 384 385 386//-------------------------------------------------- 387// Event handlers 388// it is strictly verboten to call those methods outside of the event loop 389 390void GenericPlayer::onPrepare() { 391 SL_LOGV("GenericPlayer::onPrepare()"); 392 // Subclass is responsible for indicating whether prepare was successful or unsuccessful 393 // by updating mStateFlags accordingly. It must set exactly one of these two flags. 394 assert(!(mStateFlags & kFlagPrepared) != !(mStateFlags & kFlagPreparedUnsuccessfully)); 395 notify(PLAYEREVENT_PREPARED, mStateFlags & kFlagPrepared ? PLAYER_SUCCESS : PLAYER_FAILURE, 396 true /*async*/); 397 SL_LOGD("GenericPlayer::onPrepare() done, mStateFlags=0x%x", mStateFlags); 398} 399 400 401void GenericPlayer::onNotify(const sp<AMessage> &msg) { 402 SL_LOGV("GenericPlayer::onNotify()"); 403 notif_cbf_t notifClient; 404 void* notifUser; 405 { 406 android::Mutex::Autolock autoLock(mNotifyClientLock); 407 if (NULL == mNotifyClient) { 408 return; 409 } else { 410 notifClient = mNotifyClient; 411 notifUser = mNotifyUser; 412 } 413 } 414 415 int32_t val1, val2; 416 if (msg->findInt32(PLAYEREVENT_PREFETCHSTATUSCHANGE, &val1)) { 417 SL_LOGV("GenericPlayer notifying %s = %d", PLAYEREVENT_PREFETCHSTATUSCHANGE, val1); 418 notifClient(kEventPrefetchStatusChange, val1, 0, notifUser); 419 } else if (msg->findInt32(PLAYEREVENT_PREFETCHFILLLEVELUPDATE, &val1)) { 420 SL_LOGV("GenericPlayer notifying %s = %d", PLAYEREVENT_PREFETCHFILLLEVELUPDATE, val1); 421 notifClient(kEventPrefetchFillLevelUpdate, val1, 0, notifUser); 422 } else if (msg->findInt32(PLAYEREVENT_ENDOFSTREAM, &val1)) { 423 SL_LOGV("GenericPlayer notifying %s = %d", PLAYEREVENT_ENDOFSTREAM, val1); 424 notifClient(kEventEndOfStream, val1, 0, notifUser); 425 } else if (msg->findInt32(PLAYEREVENT_PREPARED, &val1)) { 426 SL_LOGV("GenericPlayer notifying %s = %d", PLAYEREVENT_PREPARED, val1); 427 notifClient(kEventPrepared, val1, 0, notifUser); 428 } else if (msg->findInt32(PLAYEREVENT_CHANNEL_COUNT, &val1)) { 429 SL_LOGV("GenericPlayer notifying %s = %d", PLAYEREVENT_CHANNEL_COUNT, val1); 430 notifClient(kEventChannelCount, val1, 0, notifUser); 431 } else if (msg->findRect(PLAYEREVENT_VIDEO_SIZE_UPDATE, &val1, &val2, &val1, &val2)) { 432 SL_LOGV("GenericPlayer notifying %s = %d, %d", PLAYEREVENT_VIDEO_SIZE_UPDATE, val1, val2); 433 notifClient(kEventHasVideoSize, val1, val2, notifUser); 434 } else if (msg->findInt32(PLAYEREVENT_PLAY, &val1)) { 435 SL_LOGV("GenericPlayer notifying %s = %d", PLAYEREVENT_PLAY, val1); 436 notifClient(kEventPlay, val1, 0, notifUser); 437 } else { 438 SL_LOGV("GenericPlayer notifying unknown"); 439 } 440} 441 442 443void GenericPlayer::onPlay() { 444 SL_LOGD("GenericPlayer::onPlay()"); 445 if ((mStateFlags & (kFlagPrepared | kFlagPlaying)) == kFlagPrepared) { 446 SL_LOGD("starting player"); 447 mStateFlags |= kFlagPlaying; 448 updateOneShot(); 449 } 450} 451 452 453void GenericPlayer::onPause() { 454 SL_LOGD("GenericPlayer::onPause()"); 455 if (!(~mStateFlags & (kFlagPrepared | kFlagPlaying))) { 456 SL_LOGV("pausing player"); 457 mStateFlags &= ~kFlagPlaying; 458 updateOneShot(); 459 } 460} 461 462 463void GenericPlayer::onSeek(const sp<AMessage> &msg) { 464 SL_LOGV("GenericPlayer::onSeek"); 465} 466 467 468void GenericPlayer::onLoop(const sp<AMessage> &msg) { 469 SL_LOGV("GenericPlayer::onLoop"); 470} 471 472 473void GenericPlayer::onVolumeUpdate() { 474 SL_LOGV("GenericPlayer::onVolumeUpdate"); 475} 476 477 478void GenericPlayer::onSeekComplete() { 479 SL_LOGD("GenericPlayer::onSeekComplete()"); 480 mStateFlags &= ~kFlagSeeking; 481 // avoid spurious or lost events caused by seeking past a marker 482 mDeliveredNewPosMs = ANDROID_UNKNOWN_TIME; 483 mObservedPositionMs = ANDROID_UNKNOWN_TIME; 484 updateOneShot(); 485} 486 487 488void GenericPlayer::onBufferingUpdate(const sp<AMessage> &msg) { 489 SL_LOGV("GenericPlayer::onBufferingUpdate"); 490} 491 492 493void GenericPlayer::onSetBufferingUpdateThreshold(const sp<AMessage> &msg) { 494 SL_LOGV("GenericPlayer::onSetBufferingUpdateThreshold"); 495 int32_t thresholdPercent = 0; 496 if (msg->findInt32(WHATPARAM_BUFFERING_UPDATETHRESHOLD_PERCENT, &thresholdPercent)) { 497 Mutex::Autolock _l(mSettingsLock); 498 mCacheFillNotifThreshold = (int16_t)thresholdPercent; 499 } 500} 501 502 503void GenericPlayer::onAttachAuxEffect(const sp<AMessage> &msg) { 504 SL_LOGV("GenericPlayer::onAttachAuxEffect()"); 505} 506 507 508void GenericPlayer::onSetAuxEffectSendLevel(const sp<AMessage> &msg) { 509 SL_LOGV("GenericPlayer::onSetAuxEffectSendLevel()"); 510} 511 512 513void GenericPlayer::onSetPlayEvents(const sp<AMessage> &msg) { 514 SL_LOGV("GenericPlayer::onSetPlayEvents()"); 515 int32_t eventFlags, markerPositionMs, positionUpdatePeriodMs; 516 if (msg->findInt32(WHATPARAM_SETPLAYEVENTS_FLAGS, &eventFlags) && 517 msg->findInt32(WHATPARAM_SETPLAYEVENTS_MARKER, &markerPositionMs) && 518 msg->findInt32(WHATPARAM_SETPLAYEVENTS_UPDATE, &positionUpdatePeriodMs)) { 519 mEventFlags = eventFlags; 520 mMarkerPositionMs = markerPositionMs; 521 mPositionUpdatePeriodMs = positionUpdatePeriodMs; 522 updateOneShot(); 523 } 524} 525 526 527void GenericPlayer::onOneShot(const sp<AMessage> &msg) { 528 SL_LOGV("GenericPlayer::onOneShot()"); 529 int32_t generation; 530 if (msg->findInt32(WHATPARAM_ONESHOT_GENERATION, &generation)) { 531 if (generation != mOneShotGeneration) { 532 SL_LOGV("GenericPlayer::onOneShot() generation %d cancelled; latest is %d", 533 generation, mOneShotGeneration); 534 return; 535 } 536 updateOneShot(); 537 } 538} 539 540 541//------------------------------------------------- 542void GenericPlayer::notifyStatus() { 543 SL_LOGV("GenericPlayer::notifyStatus"); 544 notify(PLAYEREVENT_PREFETCHSTATUSCHANGE, (int32_t)mCacheStatus, true /*async*/); 545} 546 547 548void GenericPlayer::notifyCacheFill() { 549 SL_LOGV("GenericPlayer::notifyCacheFill"); 550 mLastNotifiedCacheFill = mCacheFill; 551 notify(PLAYEREVENT_PREFETCHFILLLEVELUPDATE, (int32_t)mLastNotifiedCacheFill, true/*async*/); 552} 553 554 555void GenericPlayer::seekComplete() { 556 SL_LOGV("GenericPlayer::seekComplete"); 557 sp<AMessage> msg = new AMessage(kWhatSeekComplete, id()); 558 msg->post(); 559} 560 561 562void GenericPlayer::bufferingUpdate(int16_t fillLevelPerMille) { 563 SL_LOGV("GenericPlayer::bufferingUpdate"); 564 sp<AMessage> msg = new AMessage(kWhatBufferingUpdate, id()); 565 msg->setInt32(WHATPARAM_BUFFERING_UPDATE, fillLevelPerMille); 566 msg->post(); 567} 568 569 570// For the meaning of positionMs, see comment in declaration at android_GenericPlayer.h 571void GenericPlayer::updateOneShot(int positionMs) 572{ 573 SL_LOGV("GenericPlayer::updateOneShot"); 574 575 // nop until prepared 576 if (!(mStateFlags & kFlagPrepared)) { 577 return; 578 } 579 580 // cancel any pending one-shot(s) 581 ++mOneShotGeneration; 582 583 // don't restart one-shot if player is paused or stopped 584 if (!(mStateFlags & kFlagPlaying)) { 585 return; 586 } 587 588 // get current player position in milliseconds 589 if (positionMs < 0) { 590 positionMs = ANDROID_UNKNOWN_TIME; 591 } 592 if (positionMs == ANDROID_UNKNOWN_TIME) { 593 getPositionMsec(&positionMs); 594 // normalize it 595 if (positionMs < 0) { 596 positionMs = ANDROID_UNKNOWN_TIME; 597 } 598 if (ANDROID_UNKNOWN_TIME == positionMs) { 599 // getPositionMsec is not working for some reason, give up 600 //LOGV("Does anyone really know what time it is?"); 601 return; 602 } 603 } 604 605 // delayUs is the expected delay between current position and marker; 606 // the default is infinity in case there are no upcoming marker(s) 607 int64_t delayUs = -1; 608 609 // is there a marker? 610 if ((mEventFlags & SL_PLAYEVENT_HEADATMARKER) && (mMarkerPositionMs != ANDROID_UNKNOWN_TIME)) { 611 // check to see if we have observed the position passing through the marker 612 if (mObservedPositionMs <= mMarkerPositionMs && mMarkerPositionMs <= positionMs) { 613 notify(PLAYEREVENT_PLAY, (int32_t) SL_PLAYEVENT_HEADATMARKER, true /*async*/); 614 } else if (positionMs < mMarkerPositionMs) { 615 delayUs = (mMarkerPositionMs - positionMs) * 1000LL; 616 } 617 } 618 619 // are periodic position updates needed? 620 if ((mEventFlags & SL_PLAYEVENT_HEADATNEWPOS) && 621 (mPositionUpdatePeriodMs != ANDROID_UNKNOWN_TIME)) { 622 // check to see if we have observed the position passing through a virtual marker, where the 623 // virtual marker is at the previously delivered new position plus position update period 624 int32_t virtualMarkerMs; 625 if (mDeliveredNewPosMs != ANDROID_UNKNOWN_TIME) { 626 virtualMarkerMs = mDeliveredNewPosMs + mPositionUpdatePeriodMs; 627 } else if (mObservedPositionMs != ANDROID_UNKNOWN_TIME) { 628 virtualMarkerMs = mObservedPositionMs + mPositionUpdatePeriodMs; 629 // pretend there has been an update in the past 630 mDeliveredNewPosMs = mObservedPositionMs; 631 } else { 632 virtualMarkerMs = positionMs + mPositionUpdatePeriodMs; 633 // pretend there has been an update in the past 634 mDeliveredNewPosMs = positionMs; 635 } 636 // nextVirtualMarkerMs will be set to the position of the next upcoming virtual marker 637 int32_t nextVirtualMarkerMs; 638 if (mObservedPositionMs <= virtualMarkerMs && virtualMarkerMs <= positionMs) { 639 // we did pass through the virtual marker, now compute the next virtual marker 640 mDeliveredNewPosMs = virtualMarkerMs; 641 nextVirtualMarkerMs = virtualMarkerMs + mPositionUpdatePeriodMs; 642 // re-synchronize if we missed an update 643 if (nextVirtualMarkerMs <= positionMs) { 644 SL_LOGW("Missed SL_PLAYEVENT_HEADATNEWPOS for position %d; current position %d", 645 nextVirtualMarkerMs, positionMs); 646 // try to catch up by setting next goal to current position plus update period 647 mDeliveredNewPosMs = positionMs; 648 nextVirtualMarkerMs = positionMs + mPositionUpdatePeriodMs; 649 } 650 notify(PLAYEREVENT_PLAY, (int32_t) SL_PLAYEVENT_HEADATNEWPOS, true /*async*/); 651 } else { 652 // we did not pass through the virtual marker yet, so use same marker again 653 nextVirtualMarkerMs = virtualMarkerMs; 654 } 655 // note that if arithmetic overflow occurred, nextVirtualMarkerMs will be negative 656 if (positionMs < nextVirtualMarkerMs) { 657 int64_t trialDelayUs; 658 trialDelayUs = (nextVirtualMarkerMs - positionMs) * 1000LL; 659 if (trialDelayUs > 0 && (delayUs == -1 || trialDelayUs < delayUs)) { 660 delayUs = trialDelayUs; 661 } 662 } 663 } 664 665 // we have a new observed position 666 mObservedPositionMs = positionMs; 667 668 // post the new one-shot message if needed 669 if (advancesPositionInRealTime() && delayUs >= 0) { 670 // 20 ms min delay to avoid near busy waiting 671 if (delayUs < 20000LL) { 672 delayUs = 20000LL; 673 } 674 // 1 minute max delay avoids indefinite memory leaks caused by cancelled one-shots 675 if (delayUs > 60000000LL) { 676 delayUs = 60000000LL; 677 } 678 //SL_LOGI("delayUs = %lld", delayUs); 679 sp<AMessage> msg = new AMessage(kWhatOneShot, id()); 680 msg->setInt32(WHATPARAM_ONESHOT_GENERATION, mOneShotGeneration); 681 msg->post(delayUs); 682 } 683 684} 685 686} // namespace android 687