/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="DivXTag" /> by reading the contents from a
/// specified position in a specified file.
/// </summary>
/// <param name="file">
/// A <see cref="File" /> object containing the file from
/// which the contents of the new instance is to be read.
/// </param>
/// <param name="position">
/// A <see cref="long" /> value specify at what position to
/// read the tag.
/// </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 file does not contain the file identifier at the
/// correct offset from the given position.
/// </exception>
public DivXTag(File file, long position)
{
if (file == null)
{
throw new ArgumentNullException("file");
}
file.Mode = TagLibSharp.File.AccessMode.Read;
if (position < 0 ||
position > file.Length - Size)
{
throw new ArgumentOutOfRangeException(
"position");
}
file.Seek(position);
// read the tag -- always 128 bytes
ByteVector data = file.ReadBlock((int)Size);
// some initial sanity checking
if (!data.EndsWith(FileIdentifier))
{
throw new CorruptFileException(
"DivX tag data does not end with identifier.");
}
Parse(data);
}
public DivXTag(ByteVector data)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
if (data.Count < 0x80L)
{
throw new CorruptFileException("DivX tag data is less than 128 bytes long.");
}
if (!data.EndsWith(FileIdentifier))
{
throw new CorruptFileException("DivX tag data does not end with identifier.");
}
this.Parse(data);
}
public DivXTag(ByteVector data)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
if (data.Count < Size)
{
throw new CorruptFileException("DivX tag data is less than 128 bytes long.");
}
if (!data.EndsWith(FileIdentifier))
{
throw new CorruptFileException("DivX tag data does not end with identifier.");
}
Parse(data);
}
public void EndsWith()
{
Assert.IsTrue(TestVector.EndsWith("UVWXYZ"));
Assert.IsFalse(TestVector.EndsWith("NOOP"));
}