WebCore/html/HTMLMediaElement.cpp

   1 /*
   2  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27
  28 #if ENABLE(VIDEO)
  29 #include "HTMLMediaElement.h"
  30
  31 #include "CSSHelper.h"
  32 #include "CSSPropertyNames.h"
  33 #include "CSSValueKeywords.h"
  34 #include "Event.h"
  35 #include "EventNames.h"
  36 #include "ExceptionCode.h"
  37 #include "HTMLDocument.h"
  38 #include "HTMLNames.h"
  39 #include "HTMLSourceElement.h"
  40 #include "HTMLVideoElement.h"
  41 #include <limits>
  42 #include "MediaError.h"
  43 #include "MediaList.h"
  44 #include "MediaQueryEvaluator.h"
  45 #include "MIMETypeRegistry.h"
  46 #include "MediaPlayer.h"
  47 #include "RenderVideo.h"
  48 #include "SystemTime.h"
  49 #include "TimeRanges.h"
  50 #include <wtf/MathExtras.h>
  51
  52 using namespace std;
  53
  54 namespace WebCore {
  55
  56 using namespace HTMLNames;
  57
  58 HTMLMediaElement::HTMLMediaElement(const QualifiedName& tagName, Document* doc)
  59     : HTMLElement(tagName, doc)
  60     , m_loadTimer(this, &HTMLMediaElement::loadTimerFired)
  61     , m_asyncEventTimer(this, &HTMLMediaElement::asyncEventTimerFired)
  62     , m_progressEventTimer(this, &HTMLMediaElement::progressEventTimerFired)
  63     , m_defaultPlaybackRate(1.0f)
  64     , m_networkState(EMPTY)
  65     , m_readyState(DATA_UNAVAILABLE)
  66     , m_begun(false)
  67     , m_loadedFirstFrame(false)
  68     , m_autoplaying(true)
  69     , m_currentLoop(0)
  70     , m_volume(1.0f)
  71     , m_muted(false)
  72     , m_paused(true)
  73     , m_seeking(false)
  74     , m_currentTimeDuringSeek(0)
  75     , m_previousProgress(0)
  76     , m_previousProgressTime(numeric_limits<double>::max())
  77     , m_sentStalledEvent(false)
  78     , m_bufferingRate(0)
  79     , m_loadNestingLevel(0)
  80     , m_terminateLoadBelowNestingLevel(0)
  81     , m_pausedInternal(false)
  82     , m_inActiveDocument(true)
  83     , m_player(0)
  84 {
  85     document()->registerForDocumentActivationCallbacks(this);
  86 }
  87
  88 HTMLMediaElement::~HTMLMediaElement()
  89 {
  90     document()->unregisterForDocumentActivationCallbacks(this);
  91 }
  92
  93 bool HTMLMediaElement::checkDTD(const Node* newChild)
  94 {
  95     return newChild->hasTagName(sourceTag) || HTMLElement::checkDTD(newChild);
  96 }
  97
  98 void HTMLMediaElement::attributeChanged(Attribute* attr, bool preserveDecls)
  99 {
 100     HTMLElement::attributeChanged(attr, preserveDecls);
 101
 102     const QualifiedName& attrName = attr->name();
 103     if (attrName == srcAttr) {
 104         // 3.14.9.2.
 105         // change to src attribute triggers load()
 106         if (inDocument() && m_networkState == EMPTY)
 107             scheduleLoad();
 108     } if (attrName == controlsAttr) {
 109         if (!isVideo() && attached() && (controls() != (renderer() != 0))) {
 110             detach();
 111             attach();
 112         }
 113         if (renderer())
 114             renderer()->updateFromElement();
 115     }
 116 }
 117
 118 bool HTMLMediaElement::rendererIsNeeded(RenderStyle* style)
 119 {
 120     return controls() ? HTMLElement::rendererIsNeeded(style) : false;
 121 }
 122
 123 RenderObject* HTMLMediaElement::createRenderer(RenderArena* arena, RenderStyle*)
 124 {
 125     return new (arena) RenderMedia(this);
 126 }
 127
 128 void HTMLMediaElement::insertedIntoDocument()
 129 {
 130     HTMLElement::insertedIntoDocument();
 131     if (!src().isEmpty())
 132         scheduleLoad();
 133 }
 134
 135 void HTMLMediaElement::removedFromDocument()
 136 {
 137     // FIXME: pause() may invoke load() which seem like a strange thing to do as a side effect
 138     // of removing an element. This might need to be fixed in the spec.
 139     ExceptionCode ec;
 140     pause(ec);
 141     HTMLElement::removedFromDocument();
 142 }
 143
 144 void HTMLMediaElement::attach()
 145 {
 146     ASSERT(!attached());
 147
 148     HTMLElement::attach();
 149
 150     if (renderer())
 151         renderer()->updateFromElement();
 152 }
 153
 154 void HTMLMediaElement::recalcStyle(StyleChange change)
 155 {
 156     HTMLElement::recalcStyle(change);
 157
 158     if (renderer())
 159         renderer()->updateFromElement();
 160 }
 161
 162 void HTMLMediaElement::scheduleLoad()
 163 {
 164     m_loadTimer.startOneShot(0);
 165 }
 166
 167 void HTMLMediaElement::initAndDispatchProgressEvent(const AtomicString& eventName)
 168 {
 169     bool totalKnown = m_player && m_player->totalBytesKnown();
 170     unsigned loaded = m_player ? m_player->bytesLoaded() : 0;
 171     unsigned total = m_player ? m_player->totalBytes() : 0;
 172     dispatchProgressEvent(eventName, totalKnown, loaded, total);
 173     if (renderer())
 174         renderer()->updateFromElement();
 175 }
 176
 177 void HTMLMediaElement::dispatchEventAsync(const AtomicString& eventName)
 178 {
 179     m_asyncEventsToDispatch.append(eventName);
 180     if (!m_asyncEventTimer.isActive())
 181         m_asyncEventTimer.startOneShot(0);
 182 }
 183
 184 void HTMLMediaElement::loadTimerFired(Timer<HTMLMediaElement>*)
 185 {
 186     ExceptionCode ec;
 187     load(ec);
 188 }
 189
 190 void HTMLMediaElement::asyncEventTimerFired(Timer<HTMLMediaElement>*)
 191 {
 192     Vector<AtomicString> asyncEventsToDispatch;
 193     m_asyncEventsToDispatch.swap(asyncEventsToDispatch);
 194     unsigned count = asyncEventsToDispatch.size();
 195     for (unsigned n = 0; n < count; ++n)
 196         dispatchEventForType(asyncEventsToDispatch[n], false, true);
 197 }
 198
 199 String serializeTimeOffset(float time)
 200 {
 201     String timeString = String::number(time);
 202     // FIXME serialize time offset values properly (format not specified yet)
 203     timeString.append("s");
 204     return timeString;
 205 }
 206
 207 float parseTimeOffset(const String& timeString, bool* ok = 0)
 208 {
 209     const UChar* characters = timeString.characters();
 210     unsigned length = timeString.length();
 211
 212     if (length && characters[length - 1] == 's')
 213         length--;
 214
 215     // FIXME parse time offset values (format not specified yet)
 216     float val = charactersToFloat(characters, length, ok);
 217     return val;
 218 }
 219
 220 float HTMLMediaElement::getTimeOffsetAttribute(const QualifiedName& name, float valueOnError) const
 221 {
 222     bool ok;
 223     String timeString = getAttribute(name);
 224     float result = parseTimeOffset(timeString, &ok);
 225     if (ok)
 226         return result;
 227     return valueOnError;
 228 }
 229
 230 void HTMLMediaElement::setTimeOffsetAttribute(const QualifiedName& name, float value)
 231 {
 232     setAttribute(name, serializeTimeOffset(value));
 233 }
 234
 235 PassRefPtr<MediaError> HTMLMediaElement::error() const
 236 {
 237     return m_error;
 238 }
 239
 240 KURL HTMLMediaElement::src() const
 241 {
 242     return document()->completeURL(getAttribute(srcAttr));
 243 }
 244
 245 void HTMLMediaElement::setSrc(const String& url)
 246 {
 247     setAttribute(srcAttr, url);
 248 }
 249
 250 String HTMLMediaElement::currentSrc() const
 251 {
 252     return m_currentSrc;
 253 }
 254
 255 HTMLMediaElement::NetworkState HTMLMediaElement::networkState() const
 256 {
 257     return m_networkState;
 258 }
 259
 260 float HTMLMediaElement::bufferingRate()
 261 {
 262     if (!m_player)
 263         return 0;
 264     return m_bufferingRate;
 265     //return m_player->dataRate();
 266 }
 267
 268 void HTMLMediaElement::load(ExceptionCode& ec)
 269 {
 270     String mediaSrc;
 271
 272     // 3.14.9.4. Loading the media resource
 273     // 1
 274     // if an event generated during load() ends up re-entering load(), terminate previous instances
 275     m_loadNestingLevel++;
 276     m_terminateLoadBelowNestingLevel = m_loadNestingLevel;
 277
 278     m_progressEventTimer.stop();
 279     m_sentStalledEvent = false;
 280     m_bufferingRate = 0;
 281
 282     m_loadTimer.stop();
 283
 284     // 2
 285     if (m_begun) {
 286         m_begun = false;
 287         m_error = MediaError::create(MediaError::MEDIA_ERR_ABORTED);
 288         initAndDispatchProgressEvent(eventNames().abortEvent);
 289         if (m_loadNestingLevel < m_terminateLoadBelowNestingLevel)
 290             goto end;
 291     }
 292
 293     // 3
 294     m_error = 0;
 295     m_loadedFirstFrame = false;
 296     m_autoplaying = true;
 297
 298     // 4
 299     setPlaybackRate(defaultPlaybackRate(), ec);
 300
 301     // 5
 302     if (networkState() != EMPTY) {
 303         m_networkState = EMPTY;
 304         m_readyState = DATA_UNAVAILABLE;
 305         m_paused = true;
 306         m_seeking = false;
 307         if (m_player) {
 308             m_player->pause();
 309             m_player->seek(0);
 310         }
 311         m_currentLoop = 0;
 312         dispatchEventForType(eventNames().emptiedEvent, false, true);
 313         if (m_loadNestingLevel < m_terminateLoadBelowNestingLevel)
 314             goto end;
 315     }
 316
 317     // 6
 318     mediaSrc = pickMedia();
 319     if (mediaSrc.isEmpty()) {
 320         ec = INVALID_STATE_ERR;
 321         goto end;
 322     }
 323
 324     // 7
 325     m_networkState = LOADING;
 326
 327     // 8
 328     m_currentSrc = mediaSrc;
 329
 330     // 9
 331     m_begun = true;
 332     dispatchProgressEvent(eventNames().loadstartEvent, false, 0, 0);
 333     if (m_loadNestingLevel < m_terminateLoadBelowNestingLevel)
 334         goto end;
 335
 336     // 10, 11, 12, 13
 337     m_player.clear();
 338     m_player.set(new MediaPlayer(this));
 339     updateVolume();
 340     m_player->load(m_currentSrc);
 341     if (m_loadNestingLevel < m_terminateLoadBelowNestingLevel)
 342         goto end;
 343
 344     if (renderer())
 345         renderer()->updateFromElement();
 346
 347     // 14
 348     m_previousProgressTime = WebCore::currentTime();
 349     m_previousProgress = 0;
 350     if (m_begun)
 351         // 350ms is not magic, it is in the spec!
 352         m_progressEventTimer.startRepeating(0.350);
 353 end:
 354     ASSERT(m_loadNestingLevel);
 355     m_loadNestingLevel--;
 356 }
 357
 358 void HTMLMediaElement::mediaPlayerNetworkStateChanged(MediaPlayer*)
 359 {
 360     if (!m_begun || m_networkState == EMPTY)
 361         return;
 362
 363     m_terminateLoadBelowNestingLevel = m_loadNestingLevel;
 364
 365     MediaPlayer::NetworkState state = m_player->networkState();
 366
 367     // 3.14.9.4. Loading the media resource
 368     // 14
 369     if (state == MediaPlayer::LoadFailed) {
 370         //delete m_player;
 371         //m_player = 0;
 372         // FIXME better error handling
 373         m_error = MediaError::create(MediaError::MEDIA_ERR_NETWORK);
 374         m_begun = false;
 375         m_progressEventTimer.stop();
 376         m_bufferingRate = 0;
 377
 378         initAndDispatchProgressEvent(eventNames().errorEvent);
 379         if (m_loadNestingLevel < m_terminateLoadBelowNestingLevel)
 380             return;
 381
 382         m_networkState = EMPTY;
 383
 384         if (isVideo())
 385             static_cast<HTMLVideoElement*>(this)->updatePosterImage();
 386
 387         dispatchEventForType(eventNames().emptiedEvent, false, true);
 388         return;
 389     }
 390
 391     if (state >= MediaPlayer::Loading && m_networkState < LOADING)
 392         m_networkState = LOADING;
 393
 394     if (state >= MediaPlayer::LoadedMetaData && m_networkState < LOADED_METADATA) {
 395         m_player->seek(effectiveStart());
 396         m_networkState = LOADED_METADATA;
 397
 398         dispatchEventForType(eventNames().durationchangeEvent, false, true);
 399         if (m_loadNestingLevel < m_terminateLoadBelowNestingLevel)
 400             return;
 401
 402         dispatchEventForType(eventNames().loadedmetadataEvent, false, true);
 403         if (m_loadNestingLevel < m_terminateLoadBelowNestingLevel)
 404             return;
 405     }
 406
 407     if (state >= MediaPlayer::LoadedFirstFrame && m_networkState < LOADED_FIRST_FRAME) {
 408         m_networkState = LOADED_FIRST_FRAME;
 409
 410         setReadyState(CAN_SHOW_CURRENT_FRAME);
 411
 412         if (isVideo())
 413             static_cast<HTMLVideoElement*>(this)->updatePosterImage();
 414
 415         if (m_loadNestingLevel < m_terminateLoadBelowNestingLevel)
 416             return;
 417
 418         m_loadedFirstFrame = true;
 419         if (renderer()) {
 420             ASSERT(!renderer()->isImage());
 421             static_cast<RenderVideo*>(renderer())->videoSizeChanged();
 422         }
 423
 424         dispatchEventForType(eventNames().loadedfirstframeEvent, false, true);
 425         if (m_loadNestingLevel < m_terminateLoadBelowNestingLevel)
 426             return;
 427
 428         dispatchEventForType(eventNames().canshowcurrentframeEvent, false, true);
 429         if (m_loadNestingLevel < m_terminateLoadBelowNestingLevel)
 430             return;
 431     }
 432
 433     // 15
 434     if (state == MediaPlayer::Loaded && m_networkState < LOADED) {
 435         m_begun = false;
 436         m_networkState = LOADED;
 437         m_progressEventTimer.stop();
 438         m_bufferingRate = 0;
 439         initAndDispatchProgressEvent(eventNames().loadEvent);
 440     }
 441 }
 442
 443 void HTMLMediaElement::mediaPlayerReadyStateChanged(MediaPlayer*)
 444 {
 445     MediaPlayer::ReadyState state = m_player->readyState();
 446     setReadyState((ReadyState)state);
 447 }
 448
 449 void HTMLMediaElement::setReadyState(ReadyState state)
 450 {
 451     // 3.14.9.6. The ready states
 452     if (m_readyState == state)
 453         return;
 454
 455     bool wasActivelyPlaying = activelyPlaying();
 456     m_readyState = state;
 457
 458     if (state >= CAN_PLAY)
 459         m_seeking = false;
 460
 461     if (networkState() == EMPTY)
 462         return;
 463
 464     if (state == DATA_UNAVAILABLE) {
 465         dispatchEventForType(eventNames().dataunavailableEvent, false, true);
 466         if (wasActivelyPlaying) {
 467             dispatchEventForType(eventNames().timeupdateEvent, false, true);
 468             dispatchEventForType(eventNames().waitingEvent, false, true);
 469         }
 470     } else if (state == CAN_SHOW_CURRENT_FRAME) {
 471         if (m_loadedFirstFrame)
 472             dispatchEventForType(eventNames().canshowcurrentframeEvent, false, true);
 473         if (wasActivelyPlaying) {
 474             dispatchEventForType(eventNames().timeupdateEvent, false, true);
 475             dispatchEventForType(eventNames().waitingEvent, false, true);
 476         }
 477     } else if (state == CAN_PLAY) {
 478         dispatchEventForType(eventNames().canplayEvent, false, true);
 479     } else if (state == CAN_PLAY_THROUGH) {
 480         dispatchEventForType(eventNames().canplaythroughEvent, false, true);
 481         if (m_autoplaying && m_paused && autoplay()) {
 482             m_paused = false;
 483             dispatchEventForType(eventNames().playEvent, false, true);
 484         }
 485     }
 486     updatePlayState();
 487 }
 488
 489 void HTMLMediaElement::progressEventTimerFired(Timer<HTMLMediaElement>*)
 490 {
 491     ASSERT(m_player);
 492     unsigned progress = m_player->bytesLoaded();
 493     double time = WebCore::currentTime();
 494     double timedelta = time - m_previousProgressTime;
 495     if (timedelta)
 496         m_bufferingRate = (float)(0.8 * m_bufferingRate + 0.2 * ((float)(progress - m_previousProgress)) / timedelta);
 497
 498     if (progress == m_previousProgress) {
 499         if (timedelta > 3.0 && !m_sentStalledEvent) {
 500             m_bufferingRate = 0;
 501             initAndDispatchProgressEvent(eventNames().stalledEvent);
 502             m_sentStalledEvent = true;
 503         }
 504     } else {
 505         initAndDispatchProgressEvent(eventNames().progressEvent);
 506         m_previousProgress = progress;
 507         m_previousProgressTime = time;
 508         m_sentStalledEvent = false;
 509     }
 510 }
 511
 512 void HTMLMediaElement::seek(float time, ExceptionCode& ec)
 513 {
 514     // 3.14.9.8. Seeking
 515     // 1
 516     if (networkState() < LOADED_METADATA) {
 517         ec = INVALID_STATE_ERR;
 518         return;
 519     }
 520
 521     // 2
 522     float minTime;
 523     if (currentLoop() == 0)
 524         minTime = effectiveStart();
 525     else
 526         minTime = effectiveLoopStart();
 527
 528     // 3
 529     float maxTime = currentLoop() == playCount() - 1 ? effectiveEnd() : effectiveLoopEnd();
 530
 531     // 4
 532     time = min(time, maxTime);
 533
 534     // 5
 535     time = max(time, minTime);
 536
 537     // 6
 538     RefPtr<TimeRanges> seekableRanges = seekable();
 539     if (!seekableRanges->contain(time)) {
 540         ec = INDEX_SIZE_ERR;
 541         return;
 542     }
 543
 544     // 7
 545     m_currentTimeDuringSeek = time;
 546
 547     // 8
 548     m_seeking = true;
 549
 550     // 9
 551     dispatchEventForType(eventNames().timeupdateEvent, false, true);
 552
 553     // 10
 554     // As soon as the user agent has established whether or not the media data for the new playback position is available,
 555     // and, if it is, decoded enough data to play back that position, the seeking DOM attribute must be set to false.
 556     if (m_player) {
 557         m_player->setEndTime(maxTime);
 558         m_player->seek(time);
 559     }
 560 }
 561
 562 HTMLMediaElement::ReadyState HTMLMediaElement::readyState() const
 563 {
 564     return m_readyState;
 565 }
 566
 567 bool HTMLMediaElement::seeking() const
 568 {
 569     return m_seeking;
 570 }
 571
 572 // playback state
 573 float HTMLMediaElement::currentTime() const
 574 {
 575     if (!m_player)
 576         return 0;
 577     if (m_seeking)
 578         return m_currentTimeDuringSeek;
 579     return m_player->currentTime();
 580 }
 581
 582 void HTMLMediaElement::setCurrentTime(float time, ExceptionCode& ec)
 583 {
 584     seek(time, ec);
 585 }
 586
 587 float HTMLMediaElement::duration() const
 588 {
 589     return m_player ? m_player->duration() : 0;
 590 }
 591
 592 bool HTMLMediaElement::paused() const
 593 {
 594     return m_paused;
 595 }
 596
 597 float HTMLMediaElement::defaultPlaybackRate() const
 598 {
 599     return m_defaultPlaybackRate;
 600 }
 601
 602 void HTMLMediaElement::setDefaultPlaybackRate(float rate, ExceptionCode& ec)
 603 {
 604     if (rate == 0.0f) {
 605         ec = NOT_SUPPORTED_ERR;
 606         return;
 607     }
 608     if (m_defaultPlaybackRate != rate) {
 609         m_defaultPlaybackRate = rate;
 610         dispatchEventAsync(eventNames().ratechangeEvent);
 611     }
 612 }
 613
 614 float HTMLMediaElement::playbackRate() const
 615 {
 616     return m_player ? m_player->rate() : 0;
 617 }
 618
 619 void HTMLMediaElement::setPlaybackRate(float rate, ExceptionCode& ec)
 620 {
 621     if (rate == 0.0f) {
 622         ec = NOT_SUPPORTED_ERR;
 623         return;
 624     }
 625     if (m_player && m_player->rate() != rate) {
 626         m_player->setRate(rate);
 627         dispatchEventAsync(eventNames().ratechangeEvent);
 628     }
 629 }
 630
 631 bool HTMLMediaElement::ended() const
 632 {
 633     return endedPlayback();
 634 }
 635
 636 bool HTMLMediaElement::autoplay() const
 637 {
 638     return hasAttribute(autoplayAttr);
 639 }
 640
 641 void HTMLMediaElement::setAutoplay(bool b)
 642 {
 643     setBooleanAttribute(autoplayAttr, b);
 644 }
 645
 646 void HTMLMediaElement::play(ExceptionCode& ec)
 647 {
 648     // 3.14.9.7. Playing the media resource
 649     if (!m_player || networkState() == EMPTY) {
 650         ec = 0;
 651         load(ec);
 652         if (ec)
 653             return;
 654     }
 655     ExceptionCode unused;
 656     if (endedPlayback()) {
 657         m_currentLoop = 0;
 658         seek(effectiveStart(), unused);
 659     }
 660     setPlaybackRate(defaultPlaybackRate(), unused);
 661
 662     if (m_paused) {
 663         m_paused = false;
 664         dispatchEventAsync(eventNames().playEvent);
 665     }
 666
 667     m_autoplaying = false;
 668
 669     updatePlayState();
 670 }
 671
 672 void HTMLMediaElement::pause(ExceptionCode& ec)
 673 {
 674     // 3.14.9.7. Playing the media resource
 675     if (!m_player || networkState() == EMPTY) {
 676         ec = 0;
 677         load(ec);
 678         if (ec)
 679             return;
 680     }
 681
 682     if (!m_paused) {
 683         m_paused = true;
 684         dispatchEventAsync(eventNames().timeupdateEvent);
 685         dispatchEventAsync(eventNames().pauseEvent);
 686     }
 687
 688     m_autoplaying = false;
 689
 690     updatePlayState();
 691 }
 692
 693 unsigned HTMLMediaElement::playCount() const
 694 {
 695     bool ok;
 696     unsigned count = getAttribute(playcountAttr).string().toUInt(&ok);
 697     return (count > 0 && ok) ? count : 1;
 698 }
 699
 700 void HTMLMediaElement::setPlayCount(unsigned count, ExceptionCode& ec)
 701 {
 702     if (!count) {
 703         ec = INDEX_SIZE_ERR;
 704         return;
 705     }
 706     setAttribute(playcountAttr, String::number(count));
 707     checkIfSeekNeeded();
 708 }
 709
 710 float HTMLMediaElement::start() const
 711 {
 712     return getTimeOffsetAttribute(startAttr, 0);
 713 }
 714
 715 void HTMLMediaElement::setStart(float time)
 716 {
 717     setTimeOffsetAttribute(startAttr, time);
 718     checkIfSeekNeeded();
 719 }
 720
 721 float HTMLMediaElement::end() const
 722 {
 723     return getTimeOffsetAttribute(endAttr, std::numeric_limits<float>::infinity());
 724 }
 725
 726 void HTMLMediaElement::setEnd(float time)
 727 {
 728     setTimeOffsetAttribute(endAttr, time);
 729     checkIfSeekNeeded();
 730 }
 731
 732 float HTMLMediaElement::loopStart() const
 733 {
 734     return getTimeOffsetAttribute(loopstartAttr, start());
 735 }
 736
 737 void HTMLMediaElement::setLoopStart(float time)
 738 {
 739     setTimeOffsetAttribute(loopstartAttr, time);
 740     checkIfSeekNeeded();
 741 }
 742
 743 float HTMLMediaElement::loopEnd() const
 744 {
 745     return getTimeOffsetAttribute(loopendAttr, end());
 746 }
 747
 748 void HTMLMediaElement::setLoopEnd(float time)
 749 {
 750     setTimeOffsetAttribute(loopendAttr, time);
 751     checkIfSeekNeeded();
 752 }
 753
 754 unsigned HTMLMediaElement::currentLoop() const
 755 {
 756     return m_currentLoop;
 757 }
 758
 759 void HTMLMediaElement::setCurrentLoop(unsigned currentLoop)
 760 {
 761     m_currentLoop = currentLoop;
 762 }
 763
 764 bool HTMLMediaElement::controls() const
 765 {
 766     return hasAttribute(controlsAttr);
 767 }
 768
 769 void HTMLMediaElement::setControls(bool b)
 770 {
 771     setBooleanAttribute(controlsAttr, b);
 772 }
 773
 774 float HTMLMediaElement::volume() const
 775 {
 776     return m_volume;
 777 }
 778
 779 void HTMLMediaElement::setVolume(float vol, ExceptionCode& ec)
 780 {
 781     if (vol < 0.0f || vol > 1.0f) {
 782         ec = INDEX_SIZE_ERR;
 783         return;
 784     }
 785
 786     if (m_volume != vol) {
 787         m_volume = vol;
 788         updateVolume();
 789         dispatchEventAsync(eventNames().volumechangeEvent);
 790     }
 791 }
 792
 793 bool HTMLMediaElement::muted() const
 794 {
 795     return m_muted;
 796 }
 797
 798 void HTMLMediaElement::setMuted(bool muted)
 799 {
 800     if (m_muted != muted) {
 801         m_muted = muted;
 802         updateVolume();
 803         dispatchEventAsync(eventNames().volumechangeEvent);
 804     }
 805 }
 806
 807 bool HTMLMediaElement::canPlay() const
 808 {
 809     return paused() || ended() || networkState() < LOADED_METADATA;
 810 }
 811
 812 String HTMLMediaElement::pickMedia()
 813 {
 814     // 3.14.9.2. Location of the media resource
 815     String mediaSrc = getAttribute(srcAttr);
 816     if (mediaSrc.isEmpty()) {
 817         for (Node* n = firstChild(); n; n = n->nextSibling()) {
 818             if (n->hasTagName(sourceTag)) {
 819                 HTMLSourceElement* source = static_cast<HTMLSourceElement*>(n);
 820                 if (!source->hasAttribute(srcAttr))
 821                     continue;
 822                 if (source->hasAttribute(mediaAttr)) {
 823                     MediaQueryEvaluator screenEval("screen", document()->frame(), renderer() ? renderer()->style() : 0);
 824                     RefPtr<MediaList> media = MediaList::createAllowingDescriptionSyntax(source->media());
 825                     if (!screenEval.eval(media.get()))
 826                         continue;
 827                 }
 828                 if (source->hasAttribute(typeAttr)) {
 829                     String type = source->type().stripWhiteSpace();
 830
 831                     // "type" can have parameters after a semi-colon, strip them before checking with the type registry
 832                     int semi = type.find(';');
 833                     if (semi != -1)
 834                         type = type.left(semi).stripWhiteSpace();
 835
 836                     if (!MIMETypeRegistry::isSupportedMediaMIMEType(type))
 837                         continue;
 838                 }
 839                 mediaSrc = source->src().string();
 840                 break;
 841             }
 842         }
 843     }
 844     if (!mediaSrc.isEmpty())
 845         mediaSrc = document()->completeURL(mediaSrc).string();
 846     return mediaSrc;
 847 }
 848
 849 void HTMLMediaElement::checkIfSeekNeeded()
 850 {
 851     // 3.14.9.5. Offsets into the media resource
 852     // 1
 853     if (playCount() <= m_currentLoop)
 854         m_currentLoop = playCount() - 1;
 855
 856     // 2
 857     if (networkState() <= LOADING)
 858         return;
 859
 860     // 3
 861     ExceptionCode ec;
 862     float time = currentTime();
 863     if (!m_currentLoop && time < effectiveStart())
 864         seek(effectiveStart(), ec);
 865
 866     // 4
 867     if (m_currentLoop && time < effectiveLoopStart())
 868         seek(effectiveLoopStart(), ec);
 869
 870     // 5
 871     if (m_currentLoop < playCount() - 1 && time > effectiveLoopEnd()) {
 872         seek(effectiveLoopStart(), ec);
 873         m_currentLoop++;
 874     }
 875
 876     // 6
 877     if (m_currentLoop == playCount() - 1 && time > effectiveEnd())
 878         seek(effectiveEnd(), ec);
 879
 880     updatePlayState();
 881 }
 882
 883 void HTMLMediaElement::mediaPlayerTimeChanged(MediaPlayer*)
 884 {
 885     if (readyState() >= CAN_PLAY)
 886         m_seeking = false;
 887
 888     if (m_currentLoop < playCount() - 1 && currentTime() >= effectiveLoopEnd()) {
 889         ExceptionCode ec;
 890         seek(effectiveLoopStart(), ec);
 891         m_currentLoop++;
 892         dispatchEventForType(eventNames().timeupdateEvent, false, true);
 893     }
 894
 895     if (m_currentLoop == playCount() - 1 && currentTime() >= effectiveEnd()) {
 896         dispatchEventForType(eventNames().timeupdateEvent, false, true);
 897         dispatchEventForType(eventNames().endedEvent, false, true);
 898     }
 899
 900     updatePlayState();
 901 }
 902
 903 void HTMLMediaElement::mediaPlayerRepaint(MediaPlayer*)
 904 {
 905     if (renderer())
 906         renderer()->repaint();
 907 }
 908
 909 PassRefPtr<TimeRanges> HTMLMediaElement::buffered() const
 910 {
 911     // FIXME real ranges support
 912     if (!m_player || !m_player->maxTimeBuffered())
 913         return TimeRanges::create();
 914     return TimeRanges::create(0, m_player->maxTimeBuffered());
 915 }
 916
 917 PassRefPtr<TimeRanges> HTMLMediaElement::played() const
 918 {
 919     // FIXME track played
 920     return TimeRanges::create();
 921 }
 922
 923 PassRefPtr<TimeRanges> HTMLMediaElement::seekable() const
 924 {
 925     // FIXME real ranges support
 926     if (!m_player || !m_player->maxTimeSeekable())
 927         return TimeRanges::create();
 928     return TimeRanges::create(0, m_player->maxTimeSeekable());
 929 }
 930
 931 float HTMLMediaElement::effectiveStart() const
 932 {
 933     if (!m_player)
 934         return 0;
 935     return min(start(), m_player->duration());
 936 }
 937
 938 float HTMLMediaElement::effectiveEnd() const
 939 {
 940     if (!m_player)
 941         return 0;
 942     return min(max(end(), max(start(), loopStart())), m_player->duration());
 943 }
 944
 945 float HTMLMediaElement::effectiveLoopStart() const
 946 {
 947     if (!m_player)
 948         return 0;
 949     return min(loopStart(), m_player->duration());
 950 }
 951
 952 float HTMLMediaElement::effectiveLoopEnd() const
 953 {
 954     if (!m_player)
 955         return 0;
 956     return min(max(start(), max(loopStart(), loopEnd())), m_player->duration());
 957 }
 958
 959 bool HTMLMediaElement::activelyPlaying() const
 960 {
 961     return !paused() && readyState() >= CAN_PLAY && !endedPlayback(); // && !stoppedDueToErrors() && !pausedForUserInteraction();
 962 }
 963
 964 bool HTMLMediaElement::endedPlayback() const
 965 {
 966     return networkState() >= LOADED_METADATA && currentTime() >= effectiveEnd() && currentLoop() == playCount() - 1;
 967 }
 968
 969 void HTMLMediaElement::updateVolume()
 970 {
 971     if (!m_player)
 972         return;
 973
 974     m_player->setVolume(m_muted ? 0 : m_volume);
 975
 976     if (renderer())
 977         renderer()->updateFromElement();
 978 }
 979
 980 void HTMLMediaElement::updatePlayState()
 981 {
 982     if (!m_player)
 983         return;
 984
 985     if (m_pausedInternal) {
 986         if (!m_player->paused())
 987             m_player->pause();
 988         return;
 989     }
 990
 991     m_player->setEndTime(currentLoop() == playCount() - 1 ? effectiveEnd() : effectiveLoopEnd());
 992
 993     bool shouldBePlaying = activelyPlaying() && currentTime() < effectiveEnd();
 994     if (shouldBePlaying && m_player->paused())
 995         m_player->play();
 996     else if (!shouldBePlaying && !m_player->paused())
 997         m_player->pause();
 998
 999     if (renderer())
1000         renderer()->updateFromElement();
1001 }
1002
1003 void HTMLMediaElement::setPausedInternal(bool b)
1004 {
1005     m_pausedInternal = b;
1006     updatePlayState();
1007 }
1008
1009 void HTMLMediaElement::documentWillBecomeInactive()
1010 {
1011     // 3.14.9.4. Loading the media resource
1012     // 14
1013     if (m_begun) {
1014         // For simplicity cancel the incomplete load by deleting the player
1015         m_player.clear();
1016         m_progressEventTimer.stop();
1017
1018         m_error = MediaError::create(MediaError::MEDIA_ERR_ABORTED);
1019         m_begun = false;
1020         initAndDispatchProgressEvent(eventNames().abortEvent);
1021         if (m_networkState >= LOADING) {
1022             m_networkState = EMPTY;
1023             m_readyState = DATA_UNAVAILABLE;
1024             dispatchEventForType(eventNames().emptiedEvent, false, true);
1025         }
1026     }
1027     m_inActiveDocument = false;
1028     // Stop the playback without generating events
1029     setPausedInternal(true);
1030
1031     if (renderer())
1032         renderer()->updateFromElement();
1033 }
1034
1035 void HTMLMediaElement::documentDidBecomeActive()
1036 {
1037     m_inActiveDocument = true;
1038     setPausedInternal(false);
1039
1040     if (m_error && m_error->code() == MediaError::MEDIA_ERR_ABORTED) {
1041         // Restart the load if it was aborted in the middle by moving the document to the page cache.
1042         // This behavior is not specified but it seems like a sensible thing to do.
1043         ExceptionCode ec;
1044         load(ec);
1045     }
1046
1047     if (renderer())
1048         renderer()->updateFromElement();
1049 }
1050
1051 void HTMLMediaElement::defaultEventHandler(Event* event)
1052 {
1053     if (renderer() && renderer()->isMedia())
1054         static_cast<RenderMedia*>(renderer())->forwardEvent(event);
1055     if (event->defaultHandled())
1056         return;
1057     HTMLElement::defaultEventHandler(event);
1058 }
1059
1060 }
1061
1062 #endif