public override SoundInput TryOpen(IBinaryStream file)
{
var header = file.ReadHeader(0x14);
if (header[4] != 'V')
{
return(null);
}
var key = RpgmvDecryptor.LastKey ?? RpgmvDecryptor.FindKeyFor(file.Name);
if (null == key)
{
return(null);
}
for (int i = 0; i < 4; ++i)
{
header[0x10 + i] ^= key[i];
}
if (!header.AsciiEqual(0x10, "OggS"))
{
RpgmvDecryptor.LastKey = null;
return(null);
}
RpgmvDecryptor.LastKey = key;
var ogg = RpgmvDecryptor.DecryptStream(file, key);
return(OggAudio.Instance.TryOpen(ogg));
}
} // 'RPGMV'
public override ImageMetaData ReadMetaData(IBinaryStream file)
{
var header = file.ReadHeader(0x14);
if (header[4] != 'V')
{
return(null);
}
var key = RpgmvDecryptor.LastKey ?? RpgmvDecryptor.FindKeyFor(file.Name);
if (null == key)
{
return(null);
}
for (int i = 0; i < 4; ++i)
{
header[0x10 + i] ^= key[i];
}
if (!header.AsciiEqual(0x10, "\x89PNG"))
{
RpgmvDecryptor.LastKey = null;
return(null);
}
RpgmvDecryptor.LastKey = key;
using (var png = RpgmvDecryptor.DecryptStream(file, key, true))
{
var info = Png.ReadMetaData(png);
if (null == info)
{
return(null);
}
return(new RpgmvpMetaData {
Width = info.Width,
Height = info.Height,
OffsetX = info.OffsetX,
OffsetY = info.OffsetY,
BPP = info.BPP,
Key = key,
});
}
}