private static ModsInfo FilteVailedMod(ModsInfo mods)
{
ModsInfo result = default;
foreach (var vaild_mod in (from mod in OPPAI_SUPPORT_MODS where mods.HasMod(mod) select mod))
{
result.Mod |= vaild_mod;
}
return(result);
}
public static void ParseBeatmap(ref byte[] beatmap_raw_data, Dictionary <string, string> extra_data, ModsInfo mods)
{
int status = 0;
double min_playable_start = double.MaxValue, max_playable_end = double.MinValue;
int nobjects = 0, ncircle = 0, nslider = 0, nspiner = 0;
double min_bpm = int.MaxValue, max_bpm = int.MinValue, current_bpm = 0;
using (StreamReader reader = new StreamReader(new MemoryStream(beatmap_raw_data)))
{
//简单的状态机
while (!reader.EndOfStream)
{
string line = reader.ReadLine().Trim();
//[....]
if (line.StartsWith("[") && line.EndsWith("]") && status != 0)
{
status = 0;
}
switch (status)
{
case 0: //seeking
if (line == "[General]")
{
status = 5;
}
if (line == "[Metadata]")
{
status = 1;
}
if (line == "[Difficulty]")
{
status = 4;
}
if (line == "[TimingPoints]")
{
status = 2;
}
if (line == "[HitObjects]")
{
status = 3;
}
break;
case 1: //Metadata
if (string.IsNullOrWhiteSpace(line))
{
status = 0;
break;
}
foreach (var pair in METADATA_MAP)
{
if (line.StartsWith(pair.Key))
{
extra_data[pair.Value] = line.Remove(0, pair.Key.Length + 1).Trim();
break;
}
}
break;
case 5: //General
if (string.IsNullOrWhiteSpace(line))
{
status = 0;
break;
}
foreach (var pair in GENERAL_MAP)
{
if (line.StartsWith(pair.Key))
{
extra_data[pair.Value] = line.Remove(0, pair.Key.Length + 1).Trim();
break;
}
}
break;
case 4: //Difficulty
if (string.IsNullOrWhiteSpace(line))
{
status = 0;
break;
}
foreach (var pair in DIFFICALUT_MAP)
{
if (line.StartsWith(pair.Key))
{
extra_data[pair.Value] = line.Remove(0, pair.Key.Length + 1).Trim();
break;
}
}
break;
case 2: //TimingPoints
if (string.IsNullOrWhiteSpace(line))
{
min_bpm = Math.Round(min_bpm, MidpointRounding.AwayFromZero);
max_bpm = Math.Round(max_bpm, MidpointRounding.AwayFromZero);
if (mods.HasMod(ModsInfo.Mods.DoubleTime) || mods.HasMod(ModsInfo.Mods.Nightcore))
{
min_bpm *= 1.5;
max_bpm *= 1.5;
min_bpm = Math.Round(min_bpm, MidpointRounding.AwayFromZero);
max_bpm = Math.Round(max_bpm, MidpointRounding.AwayFromZero);
}
if (mods.HasMod(ModsInfo.Mods.HalfTime))
{
min_bpm *= 0.75;
max_bpm *= 0.75;
min_bpm = Math.Round(min_bpm, MidpointRounding.AwayFromZero);
max_bpm = Math.Round(max_bpm, MidpointRounding.AwayFromZero);
}
#if DEBUG
Log.Debug($"[Oppai]BPM:{min_bpm} ~ {max_bpm}");
#endif
extra_data["min_bpm"] = min_bpm.ToString();
extra_data["max_bpm"] = max_bpm.ToString();
status = 0;
break;
}
bool is_red_line = true;
string[] data = line.Split(',');
if (data.Length >= 7)
{
if (data[6] == "1" || string.IsNullOrWhiteSpace(data[6]))
{
is_red_line = true;
}
else
{
is_red_line = false;
}
}
if (!is_red_line)
{
break; //1是红线
}
double val = double.Parse(data[1], CultureInfo.InvariantCulture);
if (val > 0)
{
val = 60000 / val;
current_bpm = val;
}
else
{
double mul = Math.Abs(100 + val) / 100.0f;
val = current_bpm * (1 + mul);
break;
}
min_bpm = Math.Min(val, min_bpm);
max_bpm = Math.Max(val, max_bpm);
break;
case 3:
if (!string.IsNullOrWhiteSpace(line))
{
var obj_data = line.Split(',');
if (obj_data.Length >= 6)
{
double?time = null;
nobjects++;
int type = int.Parse(obj_data[3]);
if (IS_TYPE(type, TYPE_CIRCLE))
{
ncircle++;
}
else if (IS_TYPE(type, TYPE_SLIDER))
{
nslider++;
}
else if (IS_TYPE(type, TYPE_SPINER))
{
nspiner++;
time = double.Parse(obj_data[5]);
}
else if (IS_TYPE(type, TYPE_MANIA_HOLD))
{
time = double.Parse(obj_data[4]);
}
var t = time ?? double.Parse(obj_data[2]);
min_playable_start = Math.Min(t, min_playable_start);
max_playable_end = Math.Max(t, max_playable_end);
}
}
break;
default:
break;
}
}
}
extra_data["num_objects"] = nobjects.ToString();
extra_data["num_circles"] = ncircle.ToString();
extra_data["num_sliders"] = nslider.ToString();
extra_data["num_spinners"] = nspiner.ToString();
var playable_duration = (int)(max_playable_end /*- min_playable_start*/);//为什么Length直接拿最后一个物件来做的？
extra_data["playable_duration"] = playable_duration.ToString();
extra_data["playable_duration_min_part"] = (playable_duration / 1000 / 60).ToString();
extra_data["playable_duration_sec_part"] = ((playable_duration / 1000) % 60).ToString();
}
