public BoxHeader(TagLib.File file, long position)
{
if (file == null)
{
throw new ArgumentNullException("file");
}
this.box = null;
this.from_disk = true;
this.position = position;
file.Seek(position);
ByteVector vector = file.ReadBlock(0x20);
int startIndex = 0;
if (vector.Count < (8 + startIndex))
{
throw new CorruptFileException("Not enough data in box header.");
}
this.header_size = 8;
this.box_size = vector.Mid(startIndex, 4).ToUInt();
this.box_type = vector.Mid(startIndex + 4, 4);
if (this.box_size == 1L)
{
if (vector.Count < (8 + startIndex))
{
throw new CorruptFileException("Not enough data in box header.");
}
this.header_size += 8;
this.box_size = vector.Mid(startIndex, 8).ToULong();
startIndex += 8;
}
if (this.box_type == TagLib.Mpeg4.BoxType.Uuid)
{
if (vector.Count < (0x10 + startIndex))
{
throw new CorruptFileException("Not enough data in box header.");
}
this.header_size += 0x10;
this.extended_type = vector.Mid(startIndex, 0x10);
}
else
{
this.extended_type = null;
}
}
public BoxHeader(ByteVector type, ByteVector extendedType)
{
this.position = -1L;
this.box = null;
this.from_disk = false;
this.box_type = type;
if (type == null)
{
throw new ArgumentNullException("type");
}
if (type.Count != 4)
{
throw new ArgumentException("Box type must be 4 bytes in length.", "type");
}
this.box_size = this.header_size = 8;
if (type != "uuid")
{
if (extendedType != null)
{
throw new ArgumentException("Extended type only permitted for 'uuid'.", "extendedType");
}
this.extended_type = extendedType;
}
else
{
if (extendedType == null)
{
throw new ArgumentNullException("extendedType");
}
if (extendedType.Count != 0x10)
{
throw new ArgumentException("Extended type must be 16 bytes in length.", "extendedType");
}
this.box_size = this.header_size = 0x18;
this.extended_type = extendedType;
}
}
