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77 lines
3.0 KiB
C++
77 lines
3.0 KiB
C++
//
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// MFM.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 18/09/2016.
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// Copyright 2016 Thomas Harte. All rights reserved.
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//
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#ifndef Storage_Disk_Encodings_MFM_hpp
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#define Storage_Disk_Encodings_MFM_hpp
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#include <cstdint>
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#include <memory>
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#include <vector>
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#include "Sector.hpp"
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#include "../../Track/Track.hpp"
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#include "../../../../Numeric/CRC.hpp"
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namespace Storage {
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namespace Encodings {
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namespace MFM {
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extern const std::size_t DefaultSectorGapLength;
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/*!
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Converts a vector of sectors into a properly-encoded MFM track.
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@param sectors The sectors to write.
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@param sector_gap_length If specified, sets the distance in whole bytes between each ID and its data.
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@param sector_gap_filler_byte If specified, sets the value (unencoded) that is used to populate the gap between each ID and its data.
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*/
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std::shared_ptr<Storage::Disk::Track> GetMFMTrackWithSectors(const std::vector<Sector> §ors, std::size_t sector_gap_length = DefaultSectorGapLength, uint8_t sector_gap_filler_byte = 0x4e);
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std::shared_ptr<Storage::Disk::Track> GetMFMTrackWithSectors(const std::vector<const Sector *> §ors, std::size_t sector_gap_length = DefaultSectorGapLength, uint8_t sector_gap_filler_byte = 0x4e);
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/*!
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Converts a vector of sectors into a properly-encoded FM track.
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@param sectors The sectors to write.
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@param sector_gap_length If specified, sets the distance in whole bytes between each ID and its data.
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@param sector_gap_filler_byte If specified, sets the value (unencoded) that is used to populate the gap between each ID and its data.
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*/
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std::shared_ptr<Storage::Disk::Track> GetFMTrackWithSectors(const std::vector<Sector> §ors, std::size_t sector_gap_length = DefaultSectorGapLength, uint8_t sector_gap_filler_byte = 0xff);
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std::shared_ptr<Storage::Disk::Track> GetFMTrackWithSectors(const std::vector<const Sector *> §ors, std::size_t sector_gap_length = DefaultSectorGapLength, uint8_t sector_gap_filler_byte = 0xff);
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class Encoder {
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public:
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Encoder(std::vector<bool> &target, std::vector<bool> *fuzzy_target);
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virtual ~Encoder() {}
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virtual void reset_target(std::vector<bool> &target, std::vector<bool> *fuzzy_target = nullptr);
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virtual void add_byte(uint8_t input, uint8_t fuzzy_mask = 0) = 0;
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virtual void add_index_address_mark() = 0;
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virtual void add_ID_address_mark() = 0;
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virtual void add_data_address_mark() = 0;
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virtual void add_deleted_data_address_mark() = 0;
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virtual void output_short(uint16_t value, uint16_t fuzzy_mask = 0);
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/// Outputs the CRC for all data since the last address mask; if @c incorrectly is @c true then outputs an incorrect CRC.
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void add_crc(bool incorrectly);
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protected:
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CRC::CCITT crc_generator_;
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private:
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std::vector<bool> *target_ = nullptr;
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std::vector<bool> *fuzzy_target_ = nullptr;
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};
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std::unique_ptr<Encoder> GetMFMEncoder(std::vector<bool> &target, std::vector<bool> *fuzzy_target = nullptr);
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std::unique_ptr<Encoder> GetFMEncoder(std::vector<bool> &target, std::vector<bool> *fuzzy_target = nullptr);
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}
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}
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}
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#endif /* MFM_hpp */
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