70 lines
1.7 KiB
C++
70 lines
1.7 KiB
C++
#ifndef TAG_PARSER_ID3GENRES_H
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#define TAG_PARSER_ID3GENRES_H
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#include "../global.h"
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#include <cstdint>
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#include <string_view>
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namespace TagParser {
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class TAG_PARSER_EXPORT Id3Genres {
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public:
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static inline std::string_view stringFromIndex(int index);
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static int indexFromString(std::string_view genre);
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static constexpr int genreCount();
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static constexpr int emptyGenreIndex();
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static constexpr bool isEmptyGenre(int index);
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static constexpr bool isIndexSupported(int index);
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private:
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static const std::string_view *genreNames();
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};
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/*!
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* \brief Returns the genre name for the specified numerical denotation as C-style string.
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*/
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inline std::string_view Id3Genres::stringFromIndex(int index)
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{
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return isIndexSupported(index) ? genreNames()[index] : std::string_view();
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}
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/*!
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* \brief Returns the number of supported genres.
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*/
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constexpr int Id3Genres::genreCount()
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{
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return 192;
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}
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/*!
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* \brief Returns the preferred genre index to indicate that no genre is set at all.
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* \remarks Apparently some files use 255 to indicate the genre information is missing although this
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* is not explicitly specified on [ID3.org](http://id3.org/ID3v1).
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*/
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constexpr int Id3Genres::emptyGenreIndex()
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{
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return 255;
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}
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/*!
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* \brief Returns whether the genre \a index indicates the genre field is not set at all.
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*/
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constexpr bool Id3Genres::isEmptyGenre(int index)
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{
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return index == emptyGenreIndex();
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}
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/*!
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* \brief Returns an indication whether the specified numerical denotation is
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* supported by this class.
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*/
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constexpr bool Id3Genres::isIndexSupported(int index)
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{
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return index >= 0 && index < genreCount();
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}
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} // namespace TagParser
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#endif // TAG_PARSER_ID3GENRES_H
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