private (List <byte> p1, List <byte> p2) DecodeStepBlocks(Step2Chunk chunk)
{
var p1 = new List <byte>();
var p2 = new List <byte>();
var currentP1 = 0;
var currentP2 = 0;
while (true)
{
var meta = chunk.Metadatas[currentP1];
var data = new byte[meta.Length];
Buffer.BlockCopy(chunk.Data, meta.Offset, data, 0, meta.Length);
p1.AddRange(data);
if (meta.Next1P == currentP1)
{
break;
}
currentP1 = meta.Next1P;
}
while (true)
{
var meta = chunk.Metadatas[currentP2];
var data = new byte[meta.Length];
Buffer.BlockCopy(chunk.Data, meta.Offset, data, 0, meta.Length);
p2.AddRange(data);
if (meta.Next2P == currentP2)
{
break;
}
currentP2 = meta.Next2P;
}
return(p1, p2);
}
public IChart Decode(Step2Chunk chunk)
{
var stepBlocks = DecodeStepBlocks(chunk);
var isSingleChart = stepBlocks.p1.SequenceEqual(stepBlocks.p2);
var steps = (isSingleChart
? DecodeSteps(stepBlocks.p1, 0)
: DecodeSteps(stepBlocks.p1, 0).Concat(DecodeSteps(stepBlocks.p2, 1)))
.ToList();
var events = steps
.SelectMany(step =>
{
var result = new List <IEvent>();
var panels = _step2EventMapper.Map(step.Panels).ToList();
foreach (var panel in panels)
{
result.Add(new Event
{
[NumericData.Player] = step.Player,
[NumericData.Column] = panel,
[NumericData.SourceColumn] = _step2EventMapper.Map(new[] { panel }),
[FlagData.Note] = true,
[NumericData.MetricOffset] = new BigRational(step.MetricOffset, 64),
[NumericData.SourceOffset] = step.MetricOffset
});
}
return(result);
})
.OrderBy(ev => ev[NumericData.MetricOffset])
.ToList();
var description = $"step2 - {events.Count(ev => ev[FlagData.Note] == true)} panels - {steps.Count(s => s.Panels != 0)} steps";
var difficulty = "Medium";
var type = $"dance-{(isSingleChart ? "single" : "double")}";
return(new Chart
{
Events = events,
[StringData.Difficulty] = difficulty,
[StringData.Type] = type,
[StringData.Description] = description
});
}