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Made something of a first attempt at a parser. Which is failing terribly.

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This commit is contained in:
Thomas Harte 2016-09-06 06:59:51 -04:00
parent 8b933182af
commit 149cbb327b
2 changed files with 108 additions and 20 deletions
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30
StaticAnalyser/Acorn/Tape.cpp
View File

@ -89,34 +89,26 @@ class Acorn1200BaudTapeParser: public StaticAnalyer::TapeParser<WaveType, Symbol
void inspect_waves(const std::vector<WaveType> &waves)
{
while(waves.size() && waves[0] == WaveType::Unrecognised)
{
remove_waves(1);
return;
}
if(waves.size() < 2) return;
if(waves.size() >= 2 && waves[0] == WaveType::Long && waves[1] == WaveType::Long)
if(waves[0] == WaveType::Long && waves[1] == WaveType::Long)
{
push_symbol(SymbolType::Zero, 2);
return;
}
if(waves.size() >= 4)
{
// If this makes a 1, post it.
if( waves[0] == WaveType::Short &&
waves[1] == WaveType::Short &&
waves[2] == WaveType::Short &&
waves[3] == WaveType::Short)
{
push_symbol(SymbolType::One, 4);
return;
}
if(waves.size() < 4) return;
// Otherwise, eject at least one wave as all options are exhausted.
remove_waves(1);
if( waves[0] == WaveType::Short &&
waves[1] == WaveType::Short &&
waves[2] == WaveType::Short &&
waves[3] == WaveType::Short)
{
push_symbol(SymbolType::One, 4);
return;
}
remove_waves(1);
}
void add_to_crc(uint8_t value)

98
StaticAnalyser/Commodore/Tape.cpp
View File

@ -8,11 +8,107 @@
#include "Tape.hpp"
#include <deque>
#include "../TapeParser.hpp"
using namespace StaticAnalyser::Commodore;
enum class WaveType {
Short, Medium, Long, Unrecognised
};
enum class SymbolType {
One, Zero, Word, EndOfBlock, LeadIn
};
class CommodoreROMTapeParser: public StaticAnalyer::TapeParser<WaveType, SymbolType> {
public:
CommodoreROMTapeParser(const std::shared_ptr<Storage::Tape::Tape> &tape) :
TapeParser(tape),
_wave_period(0.0f),
_previous_was_high(false) {}
void spin()
{
while(!is_at_end())
{
SymbolType symbol = get_next_symbol();
switch(symbol)
{
case SymbolType::One: printf("1"); break;
case SymbolType::Zero: printf("0"); break;
case SymbolType::Word: printf(" "); break;
case SymbolType::EndOfBlock: printf("\n"); break;
case SymbolType::LeadIn: printf("-"); break;
}
}
}
private:
void process_pulse(Storage::Tape::Tape::Pulse pulse)
{
bool is_high = pulse.type == Storage::Tape::Tape::Pulse::High;
_wave_period += pulse.length.get_float();
if(!is_high && _previous_was_high)
{
if(_wave_period >= 0.000592 && _wave_period < 0.000752) push_wave(WaveType::Long);
else if(_wave_period >= 0.000432 && _wave_period < 0.000592) push_wave(WaveType::Medium);
else if(_wave_period >= 0.000272 && _wave_period < 0.000432) push_wave(WaveType::Short);
else push_wave(WaveType::Unrecognised);
_wave_period = 0.0f;
}
_previous_was_high = is_high;
}
bool _previous_was_high;
float _wave_period;
void inspect_waves(const std::vector<WaveType> &waves)
{
if(waves.size() < 2) return;
if(waves[0] == WaveType::Long && waves[1] == WaveType::Medium)
{
push_symbol(SymbolType::Word, 2);
return;
}
if(waves[0] == WaveType::Long && waves[1] == WaveType::Short)
{
push_symbol(SymbolType::EndOfBlock, 2);
return;
}
if(waves[0] == WaveType::Short && waves[1] == WaveType::Medium)
{
push_symbol(SymbolType::Zero, 2);
return;
}
if(waves[0] == WaveType::Medium && waves[1] == WaveType::Short)
{
push_symbol(SymbolType::One, 2);
return;
}
if(waves[0] == WaveType::Short)
{
push_symbol(SymbolType::LeadIn, 1);
return;
}
// Otherwise, eject at least one wave as all options are exhausted.
remove_waves(1);
}
};
std::list<File> StaticAnalyser::Commodore::GetFiles(const std::shared_ptr<Storage::Tape::Tape> &tape)
{
std::list<File> file_list;
CommodoreROMTapeParser parser(tape);
parser.spin();
std::list<File> file_list;
return file_list;
}