mirror of
https://github.com/TomHarte/CLK.git
synced 2024-07-08 15:29:09 +00:00
c481293aca
It seems to be an even weirder file format than I thought; it can contain only ROM-formatted data but seemingly often contains blobs that the ROM cannot write.
73 lines
1.5 KiB
C++
73 lines
1.5 KiB
C++
//
|
|
// CAS.hpp
|
|
// Clock Signal
|
|
//
|
|
// Created by Thomas Harte on 25/11/2017.
|
|
// Copyright © 2017 Thomas Harte. All rights reserved.
|
|
//
|
|
|
|
#ifndef CAS_hpp
|
|
#define CAS_hpp
|
|
|
|
#include "../Tape.hpp"
|
|
#include "../../FileHolder.hpp"
|
|
|
|
#include <cstdint>
|
|
#include <vector>
|
|
|
|
namespace Storage {
|
|
namespace Tape {
|
|
|
|
/*!
|
|
Provides a @c Tape containing a CAS tape image, which is an MSX byte stream.
|
|
*/
|
|
class CAS: public Tape {
|
|
public:
|
|
/*!
|
|
Constructs a @c CAS containing content from the file with name @c file_name.
|
|
|
|
@throws ErrorNotCAS if this file could not be opened and recognised as a valid CAS file.
|
|
*/
|
|
CAS(const char *file_name);
|
|
|
|
enum {
|
|
ErrorNotCAS
|
|
};
|
|
|
|
// implemented to satisfy @c Tape
|
|
bool is_at_end();
|
|
|
|
private:
|
|
void virtual_reset();
|
|
Pulse virtual_get_next_pulse();
|
|
|
|
// Helper for populating the file list, below.
|
|
void get_next(Storage::FileHolder &file, uint8_t (&buffer)[10], std::size_t quantity);
|
|
|
|
// Storage for the array of data blobs to transcribe into audio;
|
|
// each chunk is preceded by a header which may be long, and is optionally
|
|
// also preceded by a gap.
|
|
struct Chunk {
|
|
bool has_gap;
|
|
bool long_header;
|
|
std::vector<std::uint8_t> data;
|
|
};
|
|
std::vector<Chunk> chunks_;
|
|
|
|
// Tracker for active state within the file list.
|
|
std::size_t chunk_pointer_ = 0;
|
|
enum class Phase {
|
|
Header,
|
|
Bytes,
|
|
Gap,
|
|
EndOfFile
|
|
} phase_ = Phase::Header;
|
|
std::size_t distance_into_phase_ = 0;
|
|
std::size_t distance_into_bit_ = 0;
|
|
};
|
|
|
|
}
|
|
}
|
|
|
|
#endif /* CAS_hpp */
|