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d83178f29d
Towards that aim, simplifies CSW handling so that even regular RLE compression uses a static grab of file contents.
69 lines
1.3 KiB
C++
69 lines
1.3 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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#ifndef CSW_hpp
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#define CSW_hpp
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#include "../Tape.hpp"
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#include "../../FileHolder.hpp"
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#include <zlib.h>
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#include <vector>
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namespace Storage {
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namespace 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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/*!
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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 char *file_name);
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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 as specified. Does not throw.
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*/
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CSW(const std::vector<uint8_t> &&data, CompressionType compression_type, 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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// 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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Pulse pulse_;
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CompressionType compression_type_;
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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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std::vector<uint8_t> source_data_;
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std::size_t source_data_pointer_;
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};
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}
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}
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#endif /* CSW_hpp */
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