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fixed cues updater

This commit is contained in:
Martchus 2015-10-08 22:12:27 +02:00
parent 8cc75e137a
commit ba77955dd4
1 changed files with 12 additions and 6 deletions
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18
matroska/matroskacues.cpp
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@ -174,22 +174,28 @@ bool MatroskaCuePositionUpdater::updateRelativeOffsets(uint64 referenceOffset, u
*/
bool MatroskaCuePositionUpdater::updateSize(EbmlElement *element, int shift)
{
if(!element || shift == 0) {
return shift != 0;
if(!shift) {
// shift is gone
return false;
}
if(!element) {
// there was no parent (shouldn't happen in a normal file structure since the Segment element should
// be parent of the Cues element)
return shift;
}
try {
// get size info
auto &size = m_sizes[element];
uint64 &size = m_sizes.at(element);
// calculate new size
uint64 newSize = shift > 0 ? size + static_cast<uint64>(shift) : size - static_cast<uint64>(shift);
uint64 newSize = shift > 0 ? size + static_cast<uint64>(shift) : size - static_cast<uint64>(-shift);
// shift parent
bool updated = updateSize(element->parent(), shift + static_cast<int>(EbmlElement::calculateSizeDenotationLength(newSize)) - static_cast<int>(EbmlElement::calculateSizeDenotationLength(size)));
// apply new size
size = newSize;
return updated;
} catch(out_of_range &) {
addNotification(NotificationType::Critical, "Size information for element is missing.", "updating index");
return false;
// the element is out of the scope of the cue position updater (likely the Segment element)
return shift;
}
}