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72 lines
1.5 KiB
C++
72 lines
1.5 KiB
C++
//
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// CAS.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 25/11/2017.
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// Copyright 2017 Thomas Harte. All rights reserved.
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//
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#ifndef CAS_hpp
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#define CAS_hpp
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#include "../Tape.hpp"
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#include "../../FileHolder.hpp"
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#include <cstdint>
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#include <string>
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#include <vector>
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namespace Storage::Tape {
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/*!
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Provides a @c Tape containing a CAS tape image, which is an MSX byte stream.
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*/
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class CAS: public Tape {
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public:
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/*!
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Constructs a @c CAS containing content from the file with name @c file_name.
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@throws ErrorNotCAS if this file could not be opened and recognised as a valid CAS file.
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*/
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CAS(const std::string &file_name);
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enum {
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ErrorNotCAS
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};
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// implemented to satisfy @c Tape
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bool is_at_end();
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private:
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void virtual_reset();
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Pulse virtual_get_next_pulse();
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// Storage for the array of data blobs to transcribe into audio;
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// each chunk is preceded by a header which may be long, and is optionally
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// also preceded by a gap.
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struct Chunk {
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bool has_gap;
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bool long_header;
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std::vector<std::uint8_t> data;
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Chunk(bool has_gap, bool long_header, const std::vector<std::uint8_t> &data) :
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has_gap(has_gap), long_header(long_header), data(std::move(data)) {}
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};
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std::vector<Chunk> chunks_;
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// Tracker for active state within the file list.
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std::size_t chunk_pointer_ = 0;
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enum class Phase {
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Header,
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Bytes,
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Gap,
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EndOfFile
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} phase_ = Phase::Header;
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std::size_t distance_into_phase_ = 0;
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std::size_t distance_into_bit_ = 0;
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};
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}
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#endif /* CAS_hpp */
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