public override SoundInput TryOpen(IBinaryStream file)
{
var header = ResourceHeader.Read(file);
if (null == header)
{
return(null);
}
AudioFormat format;
int offset;
if (0 == header.PackType)
{
if (4 != file.Read(header.Bytes, 0, 4))
{
return(null);
}
if (!Binary.AsciiEqual(header.Bytes, "RIFF"))
{
return(null);
}
format = Wav;
offset = 0x40;
}
else if (1 == header.PackType)
{
return(Unpack(file));
}
else if (2 == header.PackType)
{
format = OggAudio.Instance;
offset = 0x6C;
}
else if (6 == header.PackType && Binary.AsciiEqual(header.Bytes, 0x10, "OGG "))
{
format = OggAudio.Instance;
offset = 0x40;
}
else
{
return(null);
}
var input = new StreamRegion(file.AsStream, offset, file.Length - offset);
return(format.TryOpen(new BinaryStream(input, file.Name)));
}
public override ImageMetaData ReadMetaData(IBinaryStream file)
{
var header = ResourceHeader.Read(file);
if (null == header)
{
return(null);
}
if (Binary.AsciiEqual(header.Bytes, "IF PACKTYPE=="))
{
if (!Binary.AsciiEqual(header.Bytes, 0x0D, "0 ") ||
!Binary.AsciiEqual(header.Bytes, 0x2C, "BMP ") ||
header.PackType != 0 && header.PackType != 1)
{
return(null);
}
using (var reg = new StreamRegion(file.AsStream, 0x40, true))
using (var bmp = new BinaryStream(reg, file.Name))
{
var info = Bmp.ReadMetaData(bmp);
if (null == info)
{
return(null);
}
return(new DwqMetaData
{
Width = info.Width,
Height = info.Height,
BPP = info.BPP,
BaseType = "BMP",
PackedSize = (int)(file.Length - 0x40),
PackType = header.PackType,
HasAlpha = header.AType,
});
}
}
int packed_size;
switch (header.PackType)
{
case 0: // BMP
case 5: // JPEG
case 8: // PNG
packed_size = (int)(file.Length - 0x40);
break;
case 2: // BMP+MASK
case 3: // PACKBMP+MASK
case 7: // JPEG+MASK
packed_size = LittleEndian.ToInt32(header.Bytes, 0x20);
break;
default: // unknown format
return(null);
}
return(new DwqMetaData
{
Width = LittleEndian.ToUInt32(header.Bytes, 0x24),
Height = LittleEndian.ToUInt32(header.Bytes, 0x28),
BPP = 32,
BaseType = Encoding.ASCII.GetString(header.Bytes, 0, 0x10).TrimEnd(),
PackedSize = packed_size,
PackType = header.PackType,
HasAlpha = header.AType || 7 == header.PackType || 3 == header.PackType,
});
}
