File indexing completed on 2024-05-05 16:10:15

 /*
  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2009 Michael Howell <mhowell123@gmail.com>.
  *           (C) 2010 Allan Sandfeld Jensen <sandfeld@kde.org>.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include <wtf/Platform.h>
 
 #include "HTMLMediaElement.h"
 #include "html_element.h"
 #include "HTMLSourceElement.h"
 #include "HTMLDocument.h"
 #include "MediaError.h"
 #include "TimeRanges.h"
 #include "css/cssstyleselector.h"
 #include "css/cssproperties.h"
 #include "css/cssvalues.h"
 #include "css/csshelper.h"
 #include <phonon/mediaobject.h>
 #include <phonon/backendcapabilities.h>
 #include <rendering/render_media.h>
 #include <rendering/render_style.h>
 
 const double doubleMax = 999999999.8; // ### numeric_limits<double>::max()
 const double doubleInf = 999999999.0; // ### numeric_limits<double>::infinity()
 
 using namespace DOM;
 namespace khtml
 {
 
 HTMLMediaElement::HTMLMediaElement(Document *doc)
     : HTMLElement(doc)
     , m_defaultPlaybackRate(1.0f)
     , m_networkState(NETWORK_EMPTY)
     , m_readyState(HAVE_NOTHING)
     , m_begun(false)
     , m_loadedFirstFrame(false)
     , m_autoplaying(true)
     , m_autobuffer(true)
     , m_volume(0.5f)
     , m_muted(false)
     , m_paused(true)
     , m_seeking(false)
     , m_currentTimeDuringSeek(0)
     , m_previousProgress(0)
     , m_previousProgressTime(doubleMax)
     , m_sentStalledEvent(false)
     , m_player(new MediaPlayer())
 {
 }
 
 void HTMLMediaElement::attach()
 {
     assert(!attached());
     assert(!m_render);
     assert(parentNode());
 
     RenderStyle *_style = document()->styleSelector()->styleForElement(this);
     _style->ref();
     if (parentNode()->renderer() && parentNode()->renderer()->childAllowed() &&
             _style->display() != NONE) {
         m_render = new(document()->renderArena()) RenderMedia(this);
         static_cast<RenderMedia *>(m_render)->setPlayer(m_player.data());
         m_render->setStyle(_style);
         parentNode()->renderer()->addChild(m_render, nextRenderer());
     }
     _style->deref();
 
     NodeBaseImpl::attach();
     if (m_render) {
         m_render->updateFromElement();
     }
     setRenderer(m_render);
     updateLoadState();
 }
 
 void HTMLMediaElement::close()
 {
     HTMLElement::close();
     updateLoadState();
     if (renderer()) {
         renderer()->updateFromElement();
     }
 }
 
 HTMLMediaElement::~HTMLMediaElement()
 {
     if (m_player) {
         m_player->deleteLater();
     }
 }
 
 void HTMLMediaElement::attributeChanged(NodeImpl::Id attrId)
 {
     HTMLElement::attributeChanged(attrId);
 
     if (attrId == ATTR_SRC) {
         // 3.14.9.2.
         // change to src attribute triggers load()
         if (inDocument() && m_networkState == NETWORK_EMPTY) {
             scheduleLoad();
         }
         updateLoadState();
     } if (attrId == ATTR_CONTROLS) {
         /*if (!isVideo() && attached() && (controls() != (renderer() != 0))) {
             detach();
             attach();
         }*/
         if (renderer()) {
             renderer()->updateFromElement();
         }
     }
 }
 
 void HTMLMediaElement::scheduleLoad()
 {
     // qCDebug(KHTML_LOG) << "not implemented";
 }
 
 String serializeTimeOffset(float time)
 {
     QString timeString = QString::number(time);
     // FIXME serialize time offset values properly (format not specified yet)
     timeString.append("s");
     return timeString;
 }
 
 PassRefPtr<MediaError> HTMLMediaElement::error() const
 {
     return m_error;
 }
 
 String HTMLMediaElement::src() const
 {
     return document()->completeURL(getAttribute(ATTR_SRC).string());
 }
 
 void HTMLMediaElement::setSrc(const String &url)
 {
     setAttribute(ATTR_SRC, url);
 }
 
 String HTMLMediaElement::currentSrc() const
 {
     return m_currentSrc;
 }
 
 HTMLMediaElement::NetworkState HTMLMediaElement::networkState() const
 {
     return m_networkState;
 }
 
 bool HTMLMediaElement::autobuffer() const
 {
     return m_autobuffer;
 }
 
 void HTMLMediaElement::setAutobuffer(bool b)
 {
     m_autobuffer = b;
 }
 
 void HTMLMediaElement::load(ExceptionCode &)
 {
     loadResource(m_currentSrc);
 }
 
 void HTMLMediaElement::loadResource(String &url)
 {
     QUrl kurl(url.string());
     if (!m_player) {
         return;
     }
     if (autoplay()) {
         m_player->play(kurl);
     } else {
         m_player->load(kurl);
     }
 }
 
 void HTMLMediaElement::updateLoadState()
 {
     String url = pickMedia();
     if (currentSrc() != url) {
         m_currentSrc = url;
         if (m_autobuffer) {
             loadResource(url);
         }
     }
 }
 
 String HTMLMediaElement::canPlayType(String type)
 {
     QString theType = type.string().simplified();
     int paramsIdx = theType.indexOf(';');
     bool hasParams = (paramsIdx > 0);
     // FIXME: Phonon doesn't provide the API to handle codec parameters yet
     if (hasParams) {
         theType.truncate(paramsIdx);
     }
     if (theType == QLatin1String("audio/ogg") || theType == QLatin1String("video/ogg")) {
         theType = QLatin1String("application/ogg");
     }
     if (Phonon::BackendCapabilities::isMimeTypeAvailable(theType)) {
         return "probably";
     }
     if (theType == QLatin1String("application/octet-stream") && hasParams) {
         return "";
     }
     return "maybe";
 }
 
 void HTMLMediaElement::setReadyState(ReadyState state)
 {
     // 3.14.9.6. The ready states
     if (m_readyState == state) {
         return;
     }
 
     // ###
 
     updatePlayState();
 }
 
 HTMLMediaElement::ReadyState HTMLMediaElement::readyState() const
 {
     return m_readyState;
 }
 
 bool HTMLMediaElement::seeking() const
 {
     return m_seeking;
 }
 
 // playback state
 float HTMLMediaElement::currentTime() const
 {
     if (!m_player) {
         return 0;
     }
     if (m_seeking) {
         return m_currentTimeDuringSeek;
     }
     return m_player->currentTime();
 }
 
 void HTMLMediaElement::setCurrentTime(float time, ExceptionCode &ec)
 {
     Q_UNUSED(time);
     Q_UNUSED(ec);
     //    seek(time, ec);
 }
 
 float HTMLMediaElement::startTime() const
 {
     return 0.0f;
 }
 
 float HTMLMediaElement::duration() const
 {
     return m_player ? m_player->totalTime() : 0;
 }
 
 bool HTMLMediaElement::paused() const
 {
     return m_paused;
 }
 
 float HTMLMediaElement::defaultPlaybackRate() const
 {
     return m_defaultPlaybackRate;
 }
 
 void HTMLMediaElement::setDefaultPlaybackRate(float rate, ExceptionCode &ec)
 {
     if (rate == 0.0f) {
         ec = DOMException::NOT_SUPPORTED_ERR;
         return;
     }
     if (m_defaultPlaybackRate != rate) {
         m_defaultPlaybackRate = rate;
         // ### dispatchEventAsync(ratechangeEvent);
     }
 }
 
 float HTMLMediaElement::playbackRate() const
 {
     return 0; // stub...
 }
 
 void HTMLMediaElement::setPlaybackRate(float rate, ExceptionCode &ec)
 {
     Q_UNUSED(rate);
     Q_UNUSED(ec);
     // stub
 #if 0
     if (rate == 0.0f) {
         ec = DOMException::NOT_SUPPORTED_ERR;
         return;
     }
     if (m_player && m_player->rate() != rate) {
         m_player->setRate(rate);
         // ### dispatchEventAsync(ratechangeEvent);
     }
 #endif
 }
 
 bool HTMLMediaElement::ended() const
 {
     return endedPlayback();
 }
 
 bool HTMLMediaElement::autoplay() const
 {
     return hasAttribute(ATTR_AUTOPLAY);
 }
 
 void HTMLMediaElement::setAutoplay(bool b)
 {
     setBooleanAttribute(ATTR_AUTOPLAY, b);
 }
 
 bool HTMLMediaElement::loop() const
 {
     return hasAttribute(ATTR_LOOP);
 }
 
 void HTMLMediaElement::setLoop(bool b)
 {
     setBooleanAttribute(ATTR_LOOP, b);
 }
 
 void HTMLMediaElement::play(ExceptionCode &ec)
 {
     // 3.14.9.7. Playing the media resource
     if (!m_player || networkState() == NETWORK_EMPTY) {
         ec = 0;
         load(ec);
         if (ec) {
             return;
         }
     }
     ExceptionCode unused;
     if (endedPlayback()) {
         // ### seek(effectiveStart(), unused);
     }
     setPlaybackRate(defaultPlaybackRate(), unused);
 
     if (m_paused) {
         m_paused = false;
         // ### dispatchEventAsync(playEvent);
     }
 
     m_autoplaying = false;
 
     updatePlayState();
 }
 
 void HTMLMediaElement::pause(ExceptionCode &ec)
 {
     // 3.14.9.7. Playing the media resource
     if (!m_player || networkState() == NETWORK_EMPTY) {
         ec = 0;
         load(ec);
         if (ec) {
             return;
         }
     }
 
     if (!m_paused) {
         m_paused = true;
         // ### dispatchEventAsync(timeupdateEvent);
         // ### dispatchEventAsync(pauseEvent);
     }
 
     m_autoplaying = false;
 
     updatePlayState();
 }
 
 bool HTMLMediaElement::controls() const
 {
     return hasAttribute(ATTR_CONTROLS);
 }
 
 void HTMLMediaElement::setControls(bool b)
 {
     setBooleanAttribute(ATTR_CONTROLS, b);
 }
 
 float HTMLMediaElement::volume() const
 {
     return m_volume;
 }
 
 void HTMLMediaElement::setVolume(float vol, ExceptionCode &ec)
 {
     if (vol < 0.0f || vol > 1.0f) {
         ec = DOMException::INDEX_SIZE_ERR;
         return;
     }
 
     if (m_volume != vol) {
         m_volume = vol;
         updateVolume();
         // ### dispatchEventAsync(volumechangeEvent);
     }
 }
 
 bool HTMLMediaElement::muted() const
 {
     return m_muted;
 }
 
 void HTMLMediaElement::setMuted(bool muted)
 {
     if (m_muted != muted) {
         m_muted = muted;
         updateVolume();
         // ### dispatchEventAsync(volumechangeEvent);
     }
 }
 
 String HTMLMediaElement::pickMedia()
 {
     if (!document()) {
         return String();
     }
     // 3.14.9.2. Location of the media resource
     String mediaSrc = getAttribute(ATTR_SRC);
     String maybeSrc;
     if (mediaSrc.isEmpty()) {
         for (NodeImpl *n = firstChild(); n; n = n->nextSibling()) {
             if (n->id() == ID_SOURCE) {
                 String match = "maybe";
                 HTMLSourceElement *source = static_cast<HTMLSourceElement *>(n);
                 if (!source->hasAttribute(ATTR_SRC)) {
                     continue;
                 }
                 if (source->hasAttribute(ATTR_TYPE)) {
                     String type = source->type();
                     match = canPlayType(type);
                 }
                 if (match == "maybe" && maybeSrc.isEmpty()) {
                     maybeSrc = source->src().string();
                 } else if (match == "probably") {
                     mediaSrc = source->src().string();
                     break;
                 }
             }
         }
     }
     if (mediaSrc.isEmpty()) {
         mediaSrc = maybeSrc;
     }
     if (mediaSrc.isEmpty()) {
         return mediaSrc;
     }
     DocLoader *loader = document()->docLoader();
     if (!loader || !loader->willLoadMediaElement(mediaSrc)) {
         return String();
     }
     mediaSrc = document()->completeURL(mediaSrc.string());
     return mediaSrc;
 }
 
 void HTMLMediaElement::checkIfSeekNeeded()
 {
     // ###
 }
 
 PassRefPtr<TimeRanges> HTMLMediaElement::buffered() const
 {
     // FIXME real ranges support
 #if 0
     if (!m_player || !m_player->maxTimeBuffered()) {
         return new TimeRanges;
     }
     return new TimeRanges(0, m_player->maxTimeBuffered());
 #endif
     return new TimeRanges(0, 0.0f); // stub
 }
 
 PassRefPtr<TimeRanges> HTMLMediaElement::played() const
 {
     // FIXME track played
     return new TimeRanges;
 }
 
 PassRefPtr<TimeRanges> HTMLMediaElement::seekable() const
 {
 #if 0
     // FIXME real ranges support
     if (!m_player || !m_player->maxTimeSeekable()) {
         return new TimeRanges;
     }
     return new TimeRanges(0, m_player->maxTimeSeekable());
 #endif
     return new TimeRanges(0, 0.0f); // stub
 }
 
 bool HTMLMediaElement::endedPlayback() const
 {
 #if 0
     return networkState() >= LOADED_METADATA && currentTime() >= effectiveEnd() && currentLoop() == playCount() - 1;
 #endif
     return m_player && m_player->mediaObject()->remainingTime() == 0;
 }
 
 void HTMLMediaElement::updateVolume()
 {
     if (!m_player) {
         return;
     }
 
     m_player->setVolume(m_muted ? 0 : m_volume);
 
     if (renderer()) {
         renderer()->updateFromElement();
     }
 }
 
 void HTMLMediaElement::updatePlayState()
 {
     if (!m_player) {
         return;
     }
     if (m_autoplaying) {
         return;
     }
     if (m_paused && !m_player->isPaused()) {
         m_player->pause();
     }
     if (!m_paused && !m_player->isPlaying()) {
         m_player->play();
     }
 }
 
 }