private IEnumerable <BmsCommand> ConvertLines(IEnumerable <string> lines)
{
foreach (var line in lines)
{
if (string.IsNullOrEmpty(line))
{
continue;
}
var trimmedLine = line.Trim();
if (string.IsNullOrEmpty(trimmedLine))
{
continue;
}
// Lines not starting with # are considered comments.
if (trimmedLine[0] != '#')
{
yield return(new BmsCommand
{
Comment = trimmedLine
});
continue;
}
// Determine delimiter.
var cmd = new BmsCommand();
var delimiterOffset = Delimiters
.Select(d => new { Delimiter = d, Index = trimmedLine.IndexOf(d) })
.Where(kv => kv.Index >= 0)
.OrderBy(kv => kv.Index)
.FirstOrDefault();
if (delimiterOffset != null)
{
cmd.Name = trimmedLine.Substring(1, delimiterOffset.Index - 1).Trim().ToUpperInvariant();
cmd.Value = trimmedLine.Substring(delimiterOffset.Index + 1).Trim();
if (delimiterOffset.Delimiter == ':')
{
cmd.UseColon = true;
}
}
else
{
cmd.Name = trimmedLine.Substring(1).ToUpperInvariant();
}
yield return(cmd);
}
}
private IEnumerable <IEvent> GetMeasureEvents(BmsCommand command, IDictionary <int, BigRational> bpmMap)
{
var measure = Alphabet.DecodeNumeric(command.Name.AsSpan(0, 3));
var lane = Alphabet.DecodeHex(command.Name.AsSpan(3, 2));
switch (lane)
{
case 0x02:
{
return(new[]
{
new Event
{
[NumericData.MeasureLength] = BigRationalParser.ParseString(command.Value),
[NumericData.MetricOffset] = measure
}
});
}
}
var events = new List <Event>();
var total = command.Value.Length / 2;
for (var index = 0; index < total; index++)
{
var valueMemory = command.Value.AsMemory(index << 1, 2);
var value = valueMemory.Span;
if (value[0] == '0' && value[1] == '0')
{
continue;
}
void AddEvent(Event ev)
{
ev[NumericData.MetricOffset] = new BigRational(new BigInteger(measure), new BigInteger(index),
new BigInteger(total));
ev[NumericData.SourceData] = Alphabet.DecodeAlphanumeric(valueMemory.Span);
ev[NumericData.SourceCommand] = lane;
events.Add(ev);
}
switch (lane)
{
case 0x01:
{
AddEvent(new Event
{
[NumericData.PlaySound] = Alphabet.DecodeAlphanumeric(value)
});
break;
}
case 0x03:
{
AddEvent(new Event
{
[NumericData.Bpm] = Alphabet.DecodeHex(value)
});
break;
}
case 0x04:
{
AddEvent(new Event
{
[NumericData.BgaBase] = Alphabet.DecodeAlphanumeric(value)
});
break;
}
case 0x05:
{
AddEvent(new Event
{
[NumericData.BgaObject] = Alphabet.DecodeAlphanumeric(value)
});
break;
}
case 0x06:
{
AddEvent(new Event
{
[NumericData.BgaPoor] = Alphabet.DecodeAlphanumeric(value)
});
break;
}
case 0x07:
{
AddEvent(new Event
{
[NumericData.BgaLayer] = Alphabet.DecodeAlphanumeric(value)
});
break;
}
case 0x08:
{
var number = Alphabet.DecodeAlphanumeric(value);
if (bpmMap.ContainsKey(number))
{
AddEvent(new Event
{
[NumericData.Bpm] = bpmMap[number]
});
}
break;
}
case 0x11:
case 0x12:
case 0x13:
case 0x14:
case 0x15:
case 0x21:
case 0x22:
case 0x23:
case 0x24:
case 0x25:
{
AddEvent(new Event
{
[NumericData.Player] = (lane & 0x20) >> 5,
[FlagData.Note] = true,
[NumericData.Column] = lane & 0x0F
});
break;
}
case 0x18:
case 0x19:
case 0x28:
case 0x29:
{
AddEvent(new Event
{
[NumericData.Player] = (lane & 0x20) >> 5,
[FlagData.Note] = true,
[NumericData.Column] = (lane & 0x0F) - 2
});
break;
}
case 0x16:
case 0x26:
{
AddEvent(new Event
{
[NumericData.Player] = (lane & 0x20) >> 5,
[FlagData.Scratch] = true,
[FlagData.Note] = true
});
break;
}
case 0x17:
case 0x27:
{
AddEvent(new Event
{
[NumericData.Player] = (lane & 0x20) >> 5,
[FlagData.FreeZone] = true,
[FlagData.Note] = true
});
break;
}
case 0x31:
case 0x32:
case 0x33:
case 0x34:
case 0x35:
case 0x41:
case 0x42:
case 0x43:
case 0x44:
case 0x45:
{
AddEvent(new Event
{
[NumericData.Player] = (lane & 0x20) >> 5,
[NumericData.Column] = lane & 0x0F,
[NumericData.LoadSound] = Alphabet.DecodeAlphanumeric(value)
});
break;
}
case 0x38:
case 0x39:
case 0x48:
case 0x49:
{
AddEvent(new Event
{
[NumericData.Player] = (lane & 0x20) >> 5,
[NumericData.Column] = (lane & 0x0F) - 2,
[NumericData.LoadSound] = Alphabet.DecodeAlphanumeric(value)
});
break;
}
case 0x36:
case 0x37:
case 0x46:
case 0x47:
{
AddEvent(new Event
{
[NumericData.Player] = (lane & 0x20) >> 5,
[FlagData.Scratch] = true,
[NumericData.LoadSound] = Alphabet.DecodeAlphanumeric(value)
});
break;
}
}
}
return(events);
}
