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71 lines
1.5 KiB
C++
71 lines
1.5 KiB
C++
//
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// CSW.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 10/07/2017.
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// Copyright 2017 Thomas Harte. All rights reserved.
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//
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#pragma once
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#include "Storage/Tape/Tape.hpp"
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#include <string>
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#include <vector>
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#include <zlib.h>
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namespace Storage::Tape {
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/*!
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Provides a @c Tape containing a CSW tape image, which is a compressed 1-bit sampling.
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*/
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class CSW: public Tape {
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public:
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enum class CompressionType {
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RLE,
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ZRLE
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};
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/*!
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Constructs a @c CSW containing content from the file with name @c file_name.
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@throws ErrorNotCSW if this file could not be opened and recognised as a valid CSW file.
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*/
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CSW(const std::string &file_name);
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/*!
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Constructs a @c CSW containing content as specified. Does not throw.
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*/
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CSW(std::vector<uint8_t> &&data, CompressionType, bool initial_level, uint32_t sampling_rate);
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enum {
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ErrorNotCSW
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};
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private:
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void set_data(std::vector<uint8_t> &&data, CompressionType type);
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std::unique_ptr<FormatSerialiser> format_serialiser() const override;
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struct Serialiser: public FormatSerialiser {
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Serialiser(const std::vector<uint8_t> &data, Pulse);
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private:
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// implemented to satisfy @c FormatSerialiser
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bool is_at_end() const override;
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void reset() override;
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Pulse next_pulse() override;
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uint8_t get_next_byte();
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uint32_t get_next_int32le();
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void invert_pulse();
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Pulse pulse_;
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const std::vector<uint8_t> &source_data_;
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std::size_t source_data_pointer_ = 0;
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};
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std::vector<uint8_t> source_data_;
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Pulse pulse_;
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};
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}
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