void
TextTrack::UpdateActiveCueList()
{
if (!mTextTrackList) {
return;
}
HTMLMediaElement* mediaElement = mTextTrackList->GetMediaElement();
if (!mediaElement) {
return;
}
// Flag that indicates whether or not this call of UpdateActiveCueList has
// changed the activeCueList.
bool hasChanged = false;
// If we are dirty, i.e. an event happened that may cause the sorted mCueList
// to have changed like a seek or an insert for a cue, than we need to rebuild
// the active cue list from scratch.
if (mDirty) {
mCuePos = 0;
mDirty = false;
mActiveCueList->RemoveAll();
}
double playbackTime = mediaElement->CurrentTime();
// Remove all the cues from the active cue list whose end times now occur
// earlier then the current playback time.
for (uint32_t i = mActiveCueList->Length(); i > 0; i--) {
if ((*mActiveCueList)[i - 1]->EndTime() < playbackTime) {
mActiveCueList->RemoveCueAt(i - 1);
hasChanged = true;
}
}
// Add all the cues, starting from the position of the last cue that was
// added, that have valid start and end times for the current playback time.
// We can stop iterating safely once we encounter a cue that does not have
// a valid start time as the cue list is sorted.
for (; mCuePos < mCueList->Length() &&
(*mCueList)[mCuePos]->StartTime() <= playbackTime; mCuePos++) {
if ((*mCueList)[mCuePos]->EndTime() >= playbackTime) {
mActiveCueList->AddCue(*(*mCueList)[mCuePos]);
hasChanged = true;
}
}
if (hasChanged) {
RefPtr<AsyncEventDispatcher> asyncDispatcher =
new AsyncEventDispatcher(this, NS_LITERAL_STRING("cuechange"), false);
asyncDispatcher->PostDOMEvent();
if (mTrackElement) {
mTrackElement->DispatchTrackRunnable(NS_LITERAL_STRING("cuechange"));
}
}
}
void
TextTrack::UpdateActiveCueList()
{
if (!mTextTrackList) {
return;
}
HTMLMediaElement* mediaElement = mTextTrackList->GetMediaElement();
if (!mediaElement) {
return;
}
// If we are dirty, i.e. an event happened that may cause the sorted mCueList
// to have changed like a seek or an insert for a cue, than we need to rebuild
// the active cue list from scratch.
if (mDirty) {
mCuePos = 0;
mDirty = false;
mActiveCueList->RemoveAll();
}
double playbackTime = mediaElement->CurrentTime();
// Remove all the cues from the active cue list whose end times now occur
// earlier then the current playback time.
for (uint32_t i = mActiveCueList->Length(); i > 0; i--) {
if ((*mActiveCueList)[i - 1]->EndTime() < playbackTime) {
mActiveCueList->RemoveCueAt(i - 1);
}
}
// Add all the cues, starting from the position of the last cue that was
// added, that have valid start and end times for the current playback time.
// We can stop iterating safely once we encounter a cue that does not have
// a valid start time as the cue list is sorted.
for (; mCuePos < mCueList->Length() &&
(*mCueList)[mCuePos]->StartTime() <= playbackTime; mCuePos++) {
if ((*mCueList)[mCuePos]->EndTime() >= playbackTime) {
mActiveCueList->AddCue(*(*mCueList)[mCuePos]);
}
}
}
