void MediaControls::disableShowingTextTracks() {
TextTrackList* trackList = mediaElement().textTracks();
for (unsigned i = 0; i < trackList->length(); ++i) {
TextTrack* track = trackList->anonymousIndexedGetter(i);
if (track->mode() == TextTrack::showingKeyword())
track->setMode(TextTrack::disabledKeyword());
}
}
void AutomaticTrackSelection::perform(TextTrackList& textTracks)
{
TrackGroup captionAndSubtitleTracks(TrackGroup::CaptionsAndSubtitles);
TrackGroup descriptionTracks(TrackGroup::Description);
TrackGroup chapterTracks(TrackGroup::Chapter);
TrackGroup metadataTracks(TrackGroup::Metadata);
for (size_t i = 0; i < textTracks.length(); ++i) {
TextTrack* textTrack = textTracks.item(i);
if (!textTrack)
continue;
String kind = textTrack->kind();
TrackGroup* currentGroup;
if (kind == TextTrack::subtitlesKeyword() || kind == TextTrack::captionsKeyword()) {
currentGroup = &captionAndSubtitleTracks;
} else if (kind == TextTrack::descriptionsKeyword()) {
currentGroup = &descriptionTracks;
} else if (kind == TextTrack::chaptersKeyword()) {
currentGroup = &chapterTracks;
} else {
ASSERT(kind == TextTrack::metadataKeyword());
currentGroup = &metadataTracks;
}
if (!currentGroup->visibleTrack && textTrack->mode() == TextTrack::showingKeyword())
currentGroup->visibleTrack = textTrack;
if (!currentGroup->defaultTrack && textTrack->isDefault())
currentGroup->defaultTrack = textTrack;
// Do not add this track to the group if it has already been automatically configured
// as we only want to perform selection once per track so that adding another track
// after the initial configuration doesn't reconfigure every track - only those that
// should be changed by the new addition. For example all metadata tracks are
// disabled by default, and we don't want a track that has been enabled by script
// to be disabled automatically when a new metadata track is added later.
if (textTrack->hasBeenConfigured())
continue;
if (textTrack->language().length())
currentGroup->hasSrcLang = true;
currentGroup->tracks.append(textTrack);
}
if (captionAndSubtitleTracks.tracks.size())
performAutomaticTextTrackSelection(captionAndSubtitleTracks);
if (descriptionTracks.tracks.size())
performAutomaticTextTrackSelection(descriptionTracks);
if (chapterTracks.tracks.size())
performAutomaticTextTrackSelection(chapterTracks);
if (metadataTracks.tracks.size())
enableDefaultMetadataTextTracks(metadataTracks);
}
void MediaControlClosedCaptionsTrackListElement::updateDisplay()
{
#if ENABLE(VIDEO_TRACK)
DEFINE_STATIC_LOCAL(AtomicString, selectedClassValue, ("selected", AtomicString::ConstructFromLiteral));
if (!mediaController()->hasClosedCaptions())
return;
HTMLMediaElement* mediaElement = toParentMediaElement(this);
if (!mediaElement)
return;
TextTrackList* trackList = mediaElement->textTracks();
if (!trackList || !trackList->length())
return;
if (m_trackListHasChanged)
rebuildTrackListMenu();
bool captionsVisible = mediaElement->closedCaptionsVisible();
for (unsigned i = 0, length = m_menuItems.size(); i < length; ++i) {
RefPtr<Element> trackItem = m_menuItems[i];
int trackIndex = trackListIndexForElement(trackItem.get());
if (trackIndex != HTMLMediaElement::textTracksIndexNotFound()) {
if (trackIndex == HTMLMediaElement::textTracksOffIndex()) {
if (captionsVisible)
trackItem->classList()->remove(selectedClassValue, ASSERT_NO_EXCEPTION);
else
trackItem->classList()->add(selectedClassValue, ASSERT_NO_EXCEPTION);
} else {
TextTrack* track = trackList->item(trackIndex);
if (!track)
continue;
if (track->mode() == TextTrack::showingKeyword())
trackItem->classList()->add(selectedClassValue, ASSERT_NO_EXCEPTION);
else
trackItem->classList()->remove(selectedClassValue, ASSERT_NO_EXCEPTION);
}
}
}
#endif
}
void MediaSource::removeSourceBuffer(SourceBuffer& buffer, ExceptionCode& ec)
{
LOG(MediaSource, "MediaSource::removeSourceBuffer() %p", this);
Ref<SourceBuffer> protect(buffer);
// 2. If sourceBuffer specifies an object that is not in sourceBuffers then
// throw a NOT_FOUND_ERR exception and abort these steps.
if (!m_sourceBuffers->length() || !m_sourceBuffers->contains(buffer)) {
ec = NOT_FOUND_ERR;
return;
}
// 3. If the sourceBuffer.updating attribute equals true, then run the following steps: ...
buffer.abortIfUpdating();
// 4. Let SourceBuffer audioTracks list equal the AudioTrackList object returned by sourceBuffer.audioTracks.
RefPtr<AudioTrackList> audioTracks = buffer.audioTracks();
// 5. If the SourceBuffer audioTracks list is not empty, then run the following steps:
if (audioTracks->length()) {
// 5.1 Let HTMLMediaElement audioTracks list equal the AudioTrackList object returned by the audioTracks
// attribute on the HTMLMediaElement.
// 5.2 Let the removed enabled audio track flag equal false.
bool removedEnabledAudioTrack = false;
// 5.3 For each AudioTrack object in the SourceBuffer audioTracks list, run the following steps:
while (audioTracks->length()) {
AudioTrack* track = audioTracks->lastItem();
// 5.3.1 Set the sourceBuffer attribute on the AudioTrack object to null.
track->setSourceBuffer(nullptr);
// 5.3.2 If the enabled attribute on the AudioTrack object is true, then set the removed enabled
// audio track flag to true.
if (track->enabled())
removedEnabledAudioTrack = true;
// 5.3.3 Remove the AudioTrack object from the HTMLMediaElement audioTracks list.
// 5.3.4 Queue a task to fire a trusted event named removetrack, that does not bubble and is not
// cancelable, and that uses the TrackEvent interface, at the HTMLMediaElement audioTracks list.
if (mediaElement())
mediaElement()->removeAudioTrack(track);
// 5.3.5 Remove the AudioTrack object from the SourceBuffer audioTracks list.
// 5.3.6 Queue a task to fire a trusted event named removetrack, that does not bubble and is not
// cancelable, and that uses the TrackEvent interface, at the SourceBuffer audioTracks list.
audioTracks->remove(track);
}
// 5.4 If the removed enabled audio track flag equals true, then queue a task to fire a simple event
// named change at the HTMLMediaElement audioTracks list.
if (removedEnabledAudioTrack)
mediaElement()->audioTracks()->scheduleChangeEvent();
}
// 6. Let SourceBuffer videoTracks list equal the VideoTrackList object returned by sourceBuffer.videoTracks.
RefPtr<VideoTrackList> videoTracks = buffer.videoTracks();
// 7. If the SourceBuffer videoTracks list is not empty, then run the following steps:
if (videoTracks->length()) {
// 7.1 Let HTMLMediaElement videoTracks list equal the VideoTrackList object returned by the videoTracks
// attribute on the HTMLMediaElement.
// 7.2 Let the removed selected video track flag equal false.
bool removedSelectedVideoTrack = false;
// 7.3 For each VideoTrack object in the SourceBuffer videoTracks list, run the following steps:
while (videoTracks->length()) {
VideoTrack* track = videoTracks->lastItem();
// 7.3.1 Set the sourceBuffer attribute on the VideoTrack object to null.
track->setSourceBuffer(nullptr);
// 7.3.2 If the selected attribute on the VideoTrack object is true, then set the removed selected
// video track flag to true.
if (track->selected())
removedSelectedVideoTrack = true;
// 7.3.3 Remove the VideoTrack object from the HTMLMediaElement videoTracks list.
// 7.3.4 Queue a task to fire a trusted event named removetrack, that does not bubble and is not
// cancelable, and that uses the TrackEvent interface, at the HTMLMediaElement videoTracks list.
if (mediaElement())
mediaElement()->removeVideoTrack(track);
// 7.3.5 Remove the VideoTrack object from the SourceBuffer videoTracks list.
// 7.3.6 Queue a task to fire a trusted event named removetrack, that does not bubble and is not
// cancelable, and that uses the TrackEvent interface, at the SourceBuffer videoTracks list.
videoTracks->remove(track);
}
// 7.4 If the removed selected video track flag equals true, then queue a task to fire a simple event
// named change at the HTMLMediaElement videoTracks list.
if (removedSelectedVideoTrack)
mediaElement()->videoTracks()->scheduleChangeEvent();
}
// 8. Let SourceBuffer textTracks list equal the TextTrackList object returned by sourceBuffer.textTracks.
RefPtr<TextTrackList> textTracks = buffer.textTracks();
// 9. If the SourceBuffer textTracks list is not empty, then run the following steps:
if (textTracks->length()) {
// 9.1 Let HTMLMediaElement textTracks list equal the TextTrackList object returned by the textTracks
// attribute on the HTMLMediaElement.
// 9.2 Let the removed enabled text track flag equal false.
bool removedEnabledTextTrack = false;
// 9.3 For each TextTrack object in the SourceBuffer textTracks list, run the following steps:
while (textTracks->length()) {
TextTrack* track = textTracks->lastItem();
// 9.3.1 Set the sourceBuffer attribute on the TextTrack object to null.
track->setSourceBuffer(nullptr);
// 9.3.2 If the mode attribute on the TextTrack object is set to "showing" or "hidden", then
// set the removed enabled text track flag to true.
if (track->mode() == TextTrack::showingKeyword() || track->mode() == TextTrack::hiddenKeyword())
removedEnabledTextTrack = true;
// 9.3.3 Remove the TextTrack object from the HTMLMediaElement textTracks list.
// 9.3.4 Queue a task to fire a trusted event named removetrack, that does not bubble and is not
// cancelable, and that uses the TrackEvent interface, at the HTMLMediaElement textTracks list.
if (mediaElement())
mediaElement()->removeTextTrack(track);
// 9.3.5 Remove the TextTrack object from the SourceBuffer textTracks list.
// 9.3.6 Queue a task to fire a trusted event named removetrack, that does not bubble and is not
// cancelable, and that uses the TrackEvent interface, at the SourceBuffer textTracks list.
textTracks->remove(track);
}
// 9.4 If the removed enabled text track flag equals true, then queue a task to fire a simple event
// named change at the HTMLMediaElement textTracks list.
if (removedEnabledTextTrack)
mediaElement()->textTracks()->scheduleChangeEvent();
}
// 10. If sourceBuffer is in activeSourceBuffers, then remove sourceBuffer from activeSourceBuffers ...
m_activeSourceBuffers->remove(buffer);
// 11. Remove sourceBuffer from sourceBuffers and fire a removesourcebuffer event
// on that object.
m_sourceBuffers->remove(buffer);
// 12. Destroy all resources for sourceBuffer.
buffer.removedFromMediaSource();
}
void AutomaticTrackSelection::performAutomaticTextTrackSelection(const TrackGroup& group)
{
ASSERT(group.tracks.size());
// First, find the track in the group that should be enabled (if any).
HeapVector<Member<TextTrack>> currentlyEnabledTracks;
TextTrack* trackToEnable = nullptr;
TextTrack* defaultTrack = nullptr;
TextTrack* preferredTrack = nullptr;
TextTrack* fallbackTrack = nullptr;
int highestTrackScore = 0;
for (size_t i = 0; i < group.tracks.size(); ++i) {
TextTrack* textTrack = group.tracks[i];
if (m_configuration.disableCurrentlyEnabledTracks && textTrack->mode() == TextTrack::showingKeyword())
currentlyEnabledTracks.append(textTrack);
int trackScore = textTrackSelectionScore(*textTrack);
if (textTrack->kind() == preferredTrackKind())
trackScore += 1;
if (trackScore) {
// * If the text track kind is subtitles or captions and the user has indicated an interest in having a
// track with this text track kind, text track language, and text track label enabled, and there is no
// other text track in the media element's list of text tracks with a text track kind of either subtitles
// or captions whose text track mode is showing
// Let the text track mode be showing.
if (trackScore > highestTrackScore) {
preferredTrack = textTrack;
highestTrackScore = trackScore;
}
if (!defaultTrack && textTrack->isDefault())
defaultTrack = textTrack;
if (!fallbackTrack)
fallbackTrack = textTrack;
} else if (!group.visibleTrack && !defaultTrack && textTrack->isDefault()) {
// * If the track element has a default attribute specified, and there is no other text track in the media
// element's list of text tracks whose text track mode is showing or showing by default
// Let the text track mode be showing by default.
defaultTrack = textTrack;
}
}
if (m_configuration.textTrackKindUserPreference != TextTrackKindUserPreference::Default)
trackToEnable = preferredTrack;
if (!trackToEnable && defaultTrack)
trackToEnable = defaultTrack;
if (!trackToEnable && m_configuration.forceEnableSubtitleOrCaptionTrack && group.kind == TrackGroup::CaptionsAndSubtitles) {
if (fallbackTrack)
trackToEnable = fallbackTrack;
else
trackToEnable = group.tracks[0];
}
if (currentlyEnabledTracks.size()) {
for (size_t i = 0; i < currentlyEnabledTracks.size(); ++i) {
TextTrack* textTrack = currentlyEnabledTracks[i];
if (textTrack != trackToEnable)
textTrack->setMode(TextTrack::disabledKeyword());
}
}
if (trackToEnable)
trackToEnable->setMode(TextTrack::showingKeyword());
}
static v8::Handle<v8::Value> modeAttrGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
{
TextTrack* imp = V8TextTrack::toNative(info.Holder());
return v8String(imp->mode(), info.GetIsolate());
}
