89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
#ifndef TAG_PARSER_MP4ATOM_H
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#define TAG_PARSER_MP4ATOM_H
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#include "./mp4ids.h"
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#include "../genericfileelement.h"
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#include <c++utilities/conversion/stringconversion.h>
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#include <cstdint>
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#include <iostream>
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#include <list>
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#include <memory>
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namespace TagParser {
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class Mp4Atom;
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class Mp4Container;
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/*!
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* \brief Defines traits for the GenericFileElement implementation Mp4Atom.
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*/
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template <> class TAG_PARSER_EXPORT FileElementTraits<Mp4Atom> {
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public:
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using ContainerType = Mp4Container;
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using IdentifierType = std::uint32_t;
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using DataSizeType = std::uint64_t;
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/*!
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* \brief Returns the minimal atom size which is 8 byte.
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*/
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static constexpr std::uint8_t minimumElementSize()
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{
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return 8;
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}
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};
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class TAG_PARSER_EXPORT Mp4Atom : public GenericFileElement<Mp4Atom> {
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friend class GenericFileElement<Mp4Atom>;
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public:
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Mp4Atom(ContainerType &container, std::uint64_t startOffset);
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std::string idToString() const;
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bool isParent() const;
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bool isPadding() const;
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std::uint64_t firstChildOffset() const;
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static void seekBackAndWriteAtomSize(std::ostream &stream, const std::ostream::pos_type &startOffset, Diagnostics &diag);
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static void seekBackAndWriteAtomSize64(std::ostream &stream, const std::ostream::pos_type &startOffset);
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static constexpr void addHeaderSize(std::uint64_t &dataSize);
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static void makeHeader(std::uint64_t size, std::uint32_t id, CppUtilities::BinaryWriter &writer);
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protected:
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Mp4Atom(ContainerType &container, std::uint64_t startOffset, std::uint64_t maxSize);
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Mp4Atom(Mp4Atom &parent, std::uint64_t startOffset);
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void internalParse(Diagnostics &diag);
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private:
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std::string parsingContext() const;
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};
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/*!
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* \brief Converts the specified atom \a ID to a printable string.
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*/
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inline std::string Mp4Atom::idToString() const
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{
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auto idString = CppUtilities::interpretIntegerAsString<IdentifierType>(id());
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for (char &c : idString) {
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if (c < ' ') {
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c = '?';
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}
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}
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return idString;
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}
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/*!
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* \brief Adds the header size to the specified \a data size.
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*/
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constexpr void Mp4Atom::addHeaderSize(std::uint64_t &dataSize)
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{
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dataSize += (dataSize < 0xFFFFFFF7 ? 8 : 16);
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}
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} // namespace TagParser
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#endif // TAG_PARSER_MP4ATOM_H
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