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81 lines
2.5 KiB
C++
81 lines
2.5 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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#pragma once
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#include <cstdint>
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#include <memory>
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#include <optional>
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#include <vector>
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#include "Constants.hpp"
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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::Encodings::MFM {
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/*!
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Converts a vector of sectors into a properly-encoded FM or 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> TrackWithSectors(
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Density density,
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const std::vector<Sector> §ors,
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std::optional<std::size_t> sector_gap_length = std::nullopt,
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std::optional<uint8_t> sector_gap_filler_byte = std::nullopt);
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std::shared_ptr<Storage::Disk::Track> TrackWithSectors(
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Density density,
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const std::vector<const Sector *> §ors,
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std::optional<std::size_t> sector_gap_length = std::nullopt,
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std::optional<uint8_t> sector_gap_filler_byte = std::nullopt);
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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() = default;
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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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template <typename IteratorT> void add_bytes(IteratorT begin, IteratorT end) {
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while(begin != end) {
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add_byte(*begin);
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++begin;
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}
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}
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template <typename ContainerT> void add_bytes(const ContainerT &container) {
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write(std::begin(container), std::end(container));
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}
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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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