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60 lines
1.1 KiB
C++
60 lines
1.1 KiB
C++
//
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// Shifter.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 24/09/2017.
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// Copyright © 2017 Thomas Harte. All rights reserved.
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//
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#ifndef Shifter_hpp
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#define Shifter_hpp
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#include <cstdint>
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#include <memory>
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#include "../../../../NumberTheory/CRC.hpp"
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namespace Storage {
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namespace Encodings {
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namespace MFM {
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class Shifter {
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public:
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Shifter();
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Shifter(NumberTheory::CRC16 *crc_generator);
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void set_is_double_density(bool is_double_density);
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void set_should_obey_syncs(bool should_obey_syncs);
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void add_input_bit(int bit);
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enum Token {
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Index, ID, Data, DeletedData, Sync, Byte, None
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};
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uint8_t get_byte() const;
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Token get_token() const {
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return token_;
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}
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NumberTheory::CRC16 &get_crc_generator() {
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return *crc_generator_;
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}
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private:
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// Bit stream input state
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int bits_since_token_ = 0;
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int shift_register_ = 0;
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bool is_awaiting_marker_value_ = false;
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bool should_obey_syncs_;
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Token token_;
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// input configuration
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bool is_double_density_ = false;
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std::unique_ptr<NumberTheory::CRC16> owned_crc_generator_;
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NumberTheory::CRC16 *crc_generator_;
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};
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}
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}
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}
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#endif /* Shifter_hpp */
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