Implement determine tag/index pos for MKV
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@ -175,6 +175,9 @@ bool AbstractContainer::supportsTrackModifications() const
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* \brief Determines the position of the index.
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* \returns Returns ElementPosition::BeforeData or ElementPosition::AfterData if the position could
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* be determined; otherwise returns ElementPosition::Keep.
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* \remarks
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* - It might be required to parse tracks before the index position can be determined.
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* - Not be applicable for files composed of multiple segments.
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*/
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ElementPosition AbstractContainer::determineIndexPosition() const
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{
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@ -329,6 +332,9 @@ void AbstractContainer::removeAllTags()
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* \brief Determines the position of the tags inside the file.
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* \returns Returns ElementPosition::BeforeData or ElementPosition::AfterData if the position could
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* be determined; otherwise returns ElementPosition::Keep.
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* \remarks
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* - It might be required to parse tags before the tag position can be determined.
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* - Not be applicable for files composed of multiple segments.
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*/
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ElementPosition AbstractContainer::determineTagPosition() const
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{
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@ -332,14 +332,41 @@ generateRandomId:
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return attachment.get();
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}
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/*!
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* \brief Determines the position of the element with the specified \a elementId.
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* \sa determineTagPosition() and determineIndexPosition()
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*/
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ElementPosition MatroskaContainer::determineElementPosition(uint64 elementId) const
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{
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if(m_firstElement && m_segmentCount == 1) {
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if(const EbmlElement *segmentElement = m_firstElement->siblingById(MatroskaIds::Segment, true)) {
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for(const EbmlElement *childElement = segmentElement->firstChild(); childElement; childElement = childElement->nextSibling()) {
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if(childElement->id() == elementId) {
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return ElementPosition::BeforeData;
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} else if(childElement->id() == MatroskaIds::Cluster) {
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for(const auto &seekInfo : m_seekInfos) {
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for(const auto &info : seekInfo->info()) {
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if(info.first == elementId) {
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return ElementPosition::AfterData;
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}
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}
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}
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return ElementPosition::Keep;
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}
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}
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}
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}
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return ElementPosition::Keep;
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}
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ElementPosition MatroskaContainer::determineTagPosition() const
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{
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return ElementPosition::Keep; // TODO
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return determineElementPosition(MatroskaIds::Tags);
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}
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ElementPosition MatroskaContainer::determineIndexPosition() const
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{
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return ElementPosition::Keep; // TODO
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return determineElementPosition(MatroskaIds::Cues);
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}
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void MatroskaContainer::internalParseHeader()
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@ -41,6 +41,7 @@ public:
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MatroskaAttachment *createAttachment();
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MatroskaAttachment *attachment(std::size_t index);
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std::size_t attachmentCount() const;
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ElementPosition determineElementPosition(uint64 elementId) const;
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ElementPosition determineTagPosition() const;
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ElementPosition determineIndexPosition() const;
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