147 lines
3.4 KiB
C++
147 lines
3.4 KiB
C++
#ifndef MEDIA_MATROSKATAGFIELD_H
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#define MEDIA_MATROSKATAGFIELD_H
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#include "../generictagfield.h"
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#include "../statusprovider.h"
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namespace Media {
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class EbmlElement;
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class MatroskaTagField;
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/*!
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* \brief Defines traits for the TagField implementation of the MatroskaTagField class.
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*/
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template <>
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class TAG_PARSER_EXPORT TagFieldTraits<MatroskaTagField>
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{
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public:
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/*!
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* \brief Fields in a Matroska tag are identified by strings.
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*/
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typedef std::string identifierType;
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/*!
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* \brief The type info is stored using strings.
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*/
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typedef std::string typeInfoType;
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/*!
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* \brief The implementation type is EbmlElement.
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*/
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typedef MatroskaTagField implementationType;
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static bool supportsNestedFields();
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};
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/*!
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* \brief The MatroskaTagField supports nested fields.
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*/
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inline bool TagFieldTraits<MatroskaTagField>::supportsNestedFields()
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{
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return true;
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}
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class TAG_PARSER_EXPORT MatroskaTagFieldMaker
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{
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friend class MatroskaTagField;
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public:
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void make(std::ostream &stream) const;
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const MatroskaTagField &field() const;
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uint64 requiredSize() const;
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private:
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MatroskaTagFieldMaker(MatroskaTagField &field);
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MatroskaTagField &m_field;
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bool m_isBinary;
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std::string m_stringValue;
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uint64 m_simpleTagSize;
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uint64 m_totalSize;
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std::vector<MatroskaTagFieldMaker> m_nestedMaker;
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};
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/*!
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* \brief Returns the associated field.
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*/
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inline const MatroskaTagField &MatroskaTagFieldMaker::field() const
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{
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return m_field;
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}
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/*!
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* \brief Returns number of bytes which will be written when making the field.
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*/
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inline uint64 MatroskaTagFieldMaker::requiredSize() const
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{
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return m_totalSize;
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}
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class TAG_PARSER_EXPORT MatroskaTagField : public TagField<MatroskaTagField>, public StatusProvider
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{
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friend class TagField<MatroskaTagField>;
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public:
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MatroskaTagField();
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MatroskaTagField(const std::string &id, const TagValue &value);
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void reparse(EbmlElement &simpleTagElement, bool parseNestedFields = true);
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MatroskaTagFieldMaker prepareMaking();
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void make(std::ostream &stream);
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bool isAdditionalTypeInfoUsed() const;
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bool supportsNestedFields() const;
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static typename std::string fieldIdFromString(const char *idString, std::size_t idStringSize = std::string::npos);
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static std::string fieldIdToString(const std::string &id);
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protected:
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void cleared();
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};
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/*!
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* \brief Returns whether the additional type info is used.
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*/
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inline bool MatroskaTagField::isAdditionalTypeInfoUsed() const
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{
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return false;
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}
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/*!
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* \brief Returns whether nested fields are supported.
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*/
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inline bool MatroskaTagField::supportsNestedFields() const
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{
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return true;
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}
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/*!
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* \brief Converts the specified ID string representation to an actual ID.
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* \remarks As Matroska field IDs are text strings the string is just passed.
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*/
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inline std::string MatroskaTagField::fieldIdFromString(const char *idString, std::size_t idStringSize)
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{
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return idStringSize != std::string::npos ? std::string(idString, idStringSize) : std::string(idString);
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}
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/*!
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* \brief Returns the string representation for the specified \a id.
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* \remarks As Matroska field IDs are text strings the string is just passed.
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*/
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inline std::string MatroskaTagField::fieldIdToString(const std::string &id)
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{
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return id;
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}
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/*!
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* \brief Ensures the field is cleared.
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*/
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inline void MatroskaTagField::cleared()
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{}
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}
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#endif // MEDIA_MATROSKATAGFIELD_H
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