/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="HeaderObject" /> by reading the contents from a
/// specified position in a specified file.
/// </summary>
/// <param name="file">
/// A <see cref="Asf.File" /> object containing the file from
/// which the contents of the new instance are to be read.
/// </param>
/// <param name="position">
/// A <see cref="long" /> value specify at what position to
/// read the object.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="file" /> is <see langword="null" />.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException">
/// <paramref name="position" /> is less than zero or greater
/// than the size of the file.
/// </exception>
/// <exception cref="CorruptFileException">
/// The object read from disk does not have the correct GUID
/// or smaller than the minimum size.
/// </exception>
public HeaderObject(Asf.File file, long position)
: base(file, position)
{
if (!Guid.Equals(Asf.Guid.AsfHeaderObject))
{
throw new CorruptFileException(
"Object GUID incorrect.");
}
if (OriginalSize < 26)
{
throw new CorruptFileException(
"Object size too small.");
}
children = new List <Object> ();
uint child_count = file.ReadDWord();
reserved = file.ReadBlock(2);
children.AddRange(file.ReadObjects(child_count,
file.Tell));
}
