public override SoundInput TryOpen(IBinaryStream file)
{
var header = new byte[Math.Min(0xE1F, file.Length)];
if (0x10 != file.Read(header, 0, 0x10))
{
return(null);
}
var signature = LittleEndian.ToUInt32(header, 0);
byte[] key;
if (!KnownKeys.TryGetValue(signature, out key))
{
signature = LittleEndian.ToUInt32(header, 0xC);
if (!KnownKeys.TryGetValue(signature, out key))
{
return(null);
}
file.Read(header, 4, 0xC);
}
header[0] = (byte)'O';
header[1] = (byte)'g';
header[2] = (byte)'g';
header[3] = (byte)'S';
file.Read(header, 0x10, header.Length - 0x10);
int k = 0;
for (int i = 4; i < header.Length; ++i)
{
header[i] ^= key[k++];
if (k >= key.Length)
{
k = 1;
}
}
Stream input;
if (header.Length >= file.Length)
{
input = new MemoryStream(header);
}
else
{
input = new PrefixStream(header, new StreamRegion(file.AsStream, file.Position));
}
var sound = new OggInput(input);
if (header.Length >= file.Length)
{
file.Dispose();
}
return(sound);
}
public override SoundInput TryOpen(IBinaryStream file)
{
int length = (int)file.Length;
if (length < 4)
{
return(null);
}
uint signature = file.ReadUInt8();
switch (signature & 0x42)
{
case 0x42:
length -= 3;
break;
case 0x02:
case 0x40:
length -= 1;
break;
default:
return(null);
}
uint key = (signature & 0xBD) ^ 0x6A8CD4E7u;
var header = file.ReadBytes(4);
file.Position = 1;
Decrypt(header, key);
SoundInput sound = null;
if (header.AsciiEqual("RIFF"))
{
sound = new WaveInput(DecryptedStream(file, length, key));
}
else if (header.AsciiEqual("OggS"))
{
sound = new OggInput(DecryptedStream(file, length, key));
}
if (sound != null)
{
file.Dispose();
}
return(sound);
}
