Re: Pixbuf loader for jpeg2000?

[Jody Goldberg <jody gnome org>]

On Sat, Jul 12, 2003 at 04:37:10PM +0200, Sebastian Rittau wrote:
> On Fri, Jul 11, 2003 at 10:00:04PM -0400, Jody Goldberg wrote:
> 
> > If you do decide to implement a jpeg2000 loader you will want to
> > have a look at libgsf.  My reading of section 3.2, and appedix a of
> > the jpeg2000 spec indicates that it uses microsoft's OLE2 structured
> > file format as a container format. The glib based libgsf is LGPLed
> > and has read/write capabilities for OLE2.
> 
> The file format of JPEG2000 is specified in Appendix I of the spec. It
> is a box-based structure, where each box has the following format:
> 
>  Name  | Size (bits) | Description
> -------+-------------+----------------------------------------------------
>  LBox  | 32          | Box Length (special values: 0 and 1)
>  TBox  | 32          | Box type, e.g. 'jp2h'
>  XLBox | 64/0        | Extended box length, exists only if LBox is 1
>  DBox  | variable    | Box data
> 
> A box can consist of other boxes.
> 
> I don't know about the OLE format. Are these two formats identical and can
> libgsf handle this?

Apologies, I had based my assumption on
     http://www.i3a.org/pdf/wg1n1017.pdf

OLE2 is microsoft's compound document format.  The box format seems
simple enought that there's not much added value in having libgsf
support it.