85 lines
1.8 KiB
C++
85 lines
1.8 KiB
C++
#ifndef MPEG4DESCRIPTOR_H
|
|
#define MPEG4DESCRIPTOR_H
|
|
|
|
#include "../genericfileelement.h"
|
|
|
|
#include <memory>
|
|
|
|
namespace Media {
|
|
|
|
class Mp4Container;
|
|
class Mpeg4Descriptor;
|
|
|
|
/*!
|
|
* \brief Defines traits for the GenericFileElement implementation Mpeg4Descriptor.
|
|
*/
|
|
template <>
|
|
class TAG_PARSER_EXPORT FileElementTraits<Mpeg4Descriptor>
|
|
{
|
|
public:
|
|
typedef Mp4Container ContainerType;
|
|
typedef byte IdentifierType;
|
|
typedef uint32 DataSizeType;
|
|
|
|
/*!
|
|
* \brief Returns the minimal descriptor size which is 2 byte.
|
|
*/
|
|
static constexpr byte minimumElementSize()
|
|
{
|
|
return 2;
|
|
}
|
|
};
|
|
|
|
class TAG_PARSER_EXPORT Mpeg4Descriptor : public GenericFileElement<Mpeg4Descriptor>
|
|
{
|
|
friend class GenericFileElement<Mpeg4Descriptor>;
|
|
|
|
public:
|
|
Mpeg4Descriptor(ContainerType &container, uint64 startOffset, uint64 maxSize);
|
|
|
|
std::string idToString() const;
|
|
bool isParent() const;
|
|
bool isPadding() const;
|
|
uint64 firstChildOffset() const;
|
|
|
|
protected:
|
|
Mpeg4Descriptor(Mpeg4Descriptor &parent, uint64 startOffset);
|
|
|
|
void internalParse();
|
|
|
|
private:
|
|
std::string parsingContext() const;
|
|
};
|
|
|
|
/*!
|
|
* \brief Returns an indication whether the descriptor contains sub descriptors.
|
|
*
|
|
* \remarks Returns true if a first child has been denoted (via denoteFirstChild()).
|
|
*/
|
|
inline bool Mpeg4Descriptor::isParent() const
|
|
{
|
|
return m_firstChild != nullptr;
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns always false for MPEG-4 descriptors.
|
|
*/
|
|
inline bool Mpeg4Descriptor::isPadding() const
|
|
{
|
|
return false;
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns the offset of the first child (relative to the start offset of this descriptor).
|
|
*
|
|
* \remarks The first child must be denoted (via denoteFirstChild()).
|
|
*/
|
|
inline uint64 Mpeg4Descriptor::firstChildOffset() const
|
|
{
|
|
return firstChild() ? firstChild()->startOffset() - startOffset() : 0;
|
|
}
|
|
|
|
}
|
|
|
|
#endif // MPEG4DESCRIPTOR_H
|