fegger
de9db599b9
Change Track members: artwork -> std::string, genre -> TagLib::String, and add year File::readFileTag now takes a Track& and fills artist/title/album/trackNr/year/genre/format/length importFolder sets artwork to <folder>/cover.png Rename Database::addSong to addTrack
90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
#pragma once
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#include <cstddef>
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#include <cstdint>
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#include <memory>
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#include <vector>
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#include <string>
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#include <taglib/tag.h>
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struct Metadata {
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TagLib::String artist;
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TagLib::String title;
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TagLib::String album;
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TagLib::String albumArtist;
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unsigned int year;
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TagLib::VariantList artwork;
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TagLib::String genre;
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unsigned int trackNr;
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double length;
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std::string format;
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unsigned int sampleRate;
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unsigned int bitRate;
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};
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struct Track {
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TagLib::String artist;
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TagLib::String title;
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TagLib::String album;
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unsigned int trackNr;
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unsigned int length;
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unsigned int year;
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std::string filePath;
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std::string artwork;
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TagLib::String genre;
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std::string format;
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};
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using trackPtr = std::shared_ptr<Track>;
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class HashTable {
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public:
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static constexpr uint8_t EMPTY = 0x80;
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static constexpr uint8_t DELETED = 0xFE;
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explicit HashTable ( size_t capacity = 64 );
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// delete disabled - requires rehash
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HashTable ( const HashTable & ) = delete;
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HashTable &operator= ( const HashTable & ) = delete;
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HashTable ( HashTable && ) noexcept = default;
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HashTable &operator= ( HashTable && ) noexcept = default;
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void ht_insert ( const std::string &key, trackPtr track );
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trackPtr ht_lookup ( const std::string &key ) const;
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bool ht_delete ( const std::string &key );
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std::vector<std::string> listAll () const;
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void save ( const std::string &filename ) const;
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std::vector<std::unique_ptr<Track>> load ( const std::string &filename );
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std::size_t size () const noexcept { return size_; }
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std::size_t capacity () const noexcept { return ctrl_.size(); }
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private:
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static constexpr double MAX_LOAD = 0.75;
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static constexpr std::size_t GROUP_SIZE = 32;
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struct Entry {
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std::string key;
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uint64_t hash = 0;
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trackPtr track;
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};
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// helpers
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static uint64_t hashString ( const std::string &key ) noexcept;
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static uint8_t fingerprint ( uint64_t hash ) noexcept;
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std::ptrdiff_t probe ( const std::string &key, uint64_t hash, bool insert ) const noexcept;
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void rehash ( std::size_t newCapacity );
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std::vector<uint8_t> ctrl_;
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std::vector<Entry> entries_;
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std::size_t size_ = 0;
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double loadFactor_ = static_cast<double> ( size_ ) / static_cast<double> ( ctrl_.size());
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}; // Class HashTable
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