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CLK/Storage/Tape/Parsers/Oric.hpp

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Made an attempt to consolidate what I learnt of Oric encoding while building this hastily and untidily directly into the Oric implementation. (while adding support for the slow tape encoding mode)
2016-11-07 00:22:09 +00:00
//
// Oric.hpp
// Clock Signal
//
// Created by Thomas Harte on 06/11/2016.
Removes all instances of the copyright symbol.
2018-05-13 19:19:52 +00:00
// Copyright 2016 Thomas Harte. All rights reserved.
Made an attempt to consolidate what I learnt of Oric encoding while building this hastily and untidily directly into the Oric implementation. (while adding support for the slow tape encoding mode)
2016-11-07 00:22:09 +00:00
//
#ifndef Storage_Tape_Parsers_Oric_hpp
#define Storage_Tape_Parsers_Oric_hpp
#include "TapeParser.hpp"
namespace Storage {
namespace Tape {
namespace Oric {
enum class WaveType {
Eliminates all instances of µ.
2018-05-13 19:46:14 +00:00
Short, // i.e. 416 microseconds
Medium, // i.e. 624 microseconds
Long, // i.e. 832 microseconds
I am instructed that the Oric actually catches only positive transitions, and compares the distance between those to a threshold. So here's an altered version of the tape parser that does that.
2016-11-09 11:37:10 +00:00
Unrecognised
Made an attempt to consolidate what I learnt of Oric encoding while building this hastily and untidily directly into the Oric implementation. (while adding support for the slow tape encoding mode)
2016-11-07 00:22:09 +00:00
};
enum class SymbolType {
Made an attempt to build in Oric slow/fast detection.
2016-11-07 02:31:10 +00:00
One, Zero, FoundFast, FoundSlow
Made an attempt to consolidate what I learnt of Oric encoding while building this hastily and untidily directly into the Oric implementation. (while adding support for the slow tape encoding mode)
2016-11-07 00:22:09 +00:00
};
Split the normal tape parser class into two in order to add a new option: a PLL-driven tape parser. Decided to see what happens if I attempt to use that to parse CSW Acorn data.
2017-07-15 23:07:35 +00:00
class Parser: public Storage::Tape::PulseClassificationParser<WaveType, SymbolType> {
Made an attempt to consolidate what I learnt of Oric encoding while building this hastily and untidily directly into the Oric implementation. (while adding support for the slow tape encoding mode)
2016-11-07 00:22:09 +00:00
public:
int get_next_byte(const std::shared_ptr<Storage::Tape::Tape> &tape, bool use_fast_encoding);
Made an attempt to build in Oric slow/fast detection.
2016-11-07 02:31:10 +00:00
bool sync_and_get_encoding_speed(const std::shared_ptr<Storage::Tape::Tape> &tape);
Made an attempt to consolidate what I learnt of Oric encoding while building this hastily and untidily directly into the Oric implementation. (while adding support for the slow tape encoding mode)
2016-11-07 00:22:09 +00:00
private:
Split the normal tape parser class into two in order to add a new option: a PLL-driven tape parser. Decided to see what happens if I attempt to use that to parse CSW Acorn data.
2017-07-15 23:07:35 +00:00
void process_pulse(const Storage::Tape::Tape::Pulse &pulse);
Made an attempt to consolidate what I learnt of Oric encoding while building this hastily and untidily directly into the Oric implementation. (while adding support for the slow tape encoding mode)
2016-11-07 00:22:09 +00:00
void inspect_waves(const std::vector<WaveType> &waves);
Made an attempt to build in Oric slow/fast detection.
2016-11-07 02:31:10 +00:00
enum DetectionMode {
FastData,
SlowData,
Implemented better sync-to-zero and discovered a header counting bug plus, probably, a misleading representation of gaps in the Oric TAP decoder.
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FastZero,
SlowZero,
Made an attempt to build in Oric slow/fast detection.
2016-11-07 02:31:10 +00:00
Sync
'Tape' has joined the new underscore orthodoxy.
2016-12-03 17:05:19 +00:00
} detection_mode_;
bool wave_was_high_;
float cycle_length_;
Made an attempt to build in Oric slow/fast detection.
2016-11-07 02:31:10 +00:00
struct Pattern
{
WaveType type;
int count;
};
Corrects various old-fashioned bits of indentation, plus the odd const.
2019-12-22 05:00:23 +00:00
std::size_t pattern_matching_depth(const std::vector<WaveType> &waves, const Pattern *pattern);
Made an attempt to consolidate what I learnt of Oric encoding while building this hastily and untidily directly into the Oric implementation. (while adding support for the slow tape encoding mode)
2016-11-07 00:22:09 +00:00
};
}
}
}
#endif /* Oric_hpp */
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