private static DdrDatabaseEntry GetOldRecord(DdrPs2MetadataTableEntry item)
{
var record = item.Data.AsSpan();
var id = Encodings.CP437.GetStringWithoutNulls(record.Slice(0x00, 5));
if (id == string.Empty)
{
return(null);
}
return(new DdrDatabaseEntry
{
Index = item.Index,
Id = id,
Type = record[0x06],
CdTitle = record[0x07],
InternalId = Bitter.ToInt16(record, 0x08),
MaxBpm = Bitter.ToInt16(record, 0x10),
MinBpm = Bitter.ToInt16(record, 0x12),
Unknown014 = Bitter.ToInt16(record, 0x14),
SonglistOrder = Bitter.ToInt16(record, 0x16),
UnlockNumber = Bitter.ToInt16(record, 0x18),
Difficulties = new int[0],
Flags = Bitter.ToInt32(record, 0x1C),
// Radar0 = Bitter.ToInt16Array(record, 0x20, 6),
// Radar1 = Bitter.ToInt16Array(record, 0x2C, 6),
// Radar2 = Bitter.ToInt16Array(record, 0x38, 6),
// Radar3 = Bitter.ToInt16Array(record, 0x44, 6),
// Radar4 = Bitter.ToInt16Array(record, 0x50, 6)
});
}
public DdrDatabaseEntry Decode(DdrPs2MetadataTableEntry item)
{
if (item.Data.Length < 120)
{
return(GetOldRecord(item));
}
else
{
return(GetNewRecord(item));
}
}
private static DdrDatabaseEntry GetNewRecord(DdrPs2MetadataTableEntry records)
{
var record = records.Data.AsSpan();
var id = Encodings.CP437.GetStringWithoutNulls(record.Slice(0x00, 5));
var mdbIndex = 0;
var difficultyOffset = 0;
int[] difficulties;
if (id == string.Empty)
{
return(null);
}
var bpmOffset = 0;
var isXDifficulties = Bitter.ToInt16(record, 0x06) == Bitter.ToInt16(record, 0x08) &&
record.Slice(0x25, 10).ToArray().All(x => x <= 20) &&
record.Slice(0x25, 10).ToArray().Any(x => x != 0x00);
if (isXDifficulties)
{
mdbIndex = Bitter.ToInt16(record, 0x08);
bpmOffset += 0x0C;
}
else
{
if (Bitter.ToInt16(record, 0x10) != 0 && Bitter.ToInt16(record, 0x12) == 0)
{
if (record[0x06] == 0x05 && Bitter.ToInt16(record, 0x08) == Bitter.ToInt16(record, 0x0A))
{
// SN JP, SN US, SN2 US
mdbIndex = Bitter.ToInt16(record, 0x0C);
bpmOffset += 0x10;
difficultyOffset += 0x10;
}
else
{
// SN2 JP
mdbIndex = Bitter.ToInt16(record, 0x08);
bpmOffset += 0x0C;
}
}
if (Bitter.ToInt32(record, 0x14 + bpmOffset) != -1)
{
// SN, SN2
while (Bitter.ToInt32(record, 0x10 + bpmOffset) == 0)
{
bpmOffset += 4;
difficultyOffset += 4;
}
}
if (bpmOffset > 0)
{
while (Bitter.ToInt32(record, 0x24 + difficultyOffset) == 0)
{
difficultyOffset += 4;
}
}
}
if (isXDifficulties)
{
difficulties = new[]
{
record[0x26],
record[0x27],
record[0x28],
record[0x29],
record[0x25],
0,
0,
0,
record[0x2B],
record[0x2C],
record[0x2D],
record[0x2E],
record[0x2A],
0,
0,
0,
};
}
else
{
difficulties = new[]
{
record[0x24 + difficultyOffset] & 0xF,
record[0x24 + difficultyOffset] >> 4,
record[0x25 + difficultyOffset] & 0xF,
record[0x25 + difficultyOffset] >> 4,
record[0x26 + difficultyOffset] & 0xF,
record[0x26 + difficultyOffset] >> 4,
record[0x27 + difficultyOffset] & 0xF,
record[0x27 + difficultyOffset] >> 4,
record[0x28 + difficultyOffset] & 0xF,
record[0x28 + difficultyOffset] >> 4,
record[0x29 + difficultyOffset] & 0xF,
record[0x29 + difficultyOffset] >> 4,
record[0x2A + difficultyOffset] & 0xF,
record[0x2A + difficultyOffset] >> 4,
record[0x2B + difficultyOffset] & 0xF,
record[0x2B + difficultyOffset] >> 4
};
}
return(new DdrDatabaseEntry
{
Index = records.Index,
Id = id,
Type = record[0x06],
CdTitle = record[0x07],
InternalId = Bitter.ToInt16(record, 0x08),
MaxBpm = Bitter.ToInt16(record, 0x10 + bpmOffset),
MinBpm = Bitter.ToInt16(record, 0x12 + bpmOffset),
Unknown014 = Bitter.ToInt16(record, 0x14 + bpmOffset),
SonglistOrder = Bitter.ToInt16(record, 0x16 + bpmOffset),
UnlockNumber = Bitter.ToInt16(record, 0x18 + bpmOffset),
Difficulties = difficulties,
Flags = Bitter.ToInt32(record, 0x2C + difficultyOffset),
AudioTrack = mdbIndex
// Radar0 = Bitter.ToInt16Array(record, 0x30, 6),
// Radar1 = Bitter.ToInt16Array(record, 0x3C, 6),
// Radar2 = Bitter.ToInt16Array(record, 0x48, 6),
// Radar3 = Bitter.ToInt16Array(record, 0x54, 6),
// Radar4 = Bitter.ToInt16Array(record, 0x60, 6)
});
}