Re: [libdc1394-devel] general problems with Camera ROM info values

[Damien D. <d.d...@te...>]

Hi Olaf, Dan,

On Mon, 2003-08-04 at 15:24, Olaf Ronneberger wrote:
> Dan Dennedy wrote:
> >=20
> > Despite the above, given the simple nature of the task, I tend to agree
> > with Damien that it would be easier to just re-implement in a manner as
> > simple as possible inside libdc1394. Since I ported the routines from
> > gscanbus to librom1394 (and changed the code a little), I offer to do
> > this.
> >=20
>=20
> Hi Dan,
> as I now bought that AVT Dolphin Camera, I would like to have a patch in=20
> the libdc1394 cvs. Have you done already some coding for this? If not, I=20
> also could do this.
> The only thing we should decide before patching, is wether to store the=20
> ROM informations somewhere or not.
> The last statement to this topic was, that Damien would like to have at=20
> least the IIDC revision stored somewhere for fast access. Therefore I=20
> would suggest to change the following things:
>=20
> 1. add members 'unit_spec_id' and 'unit_sw_version' to the
>     dc1394_camerainfo struct
>
> 2. extend dc1394_get_camera_info() to read these two values from ROM in
>     the correct manner
>
> 3. Rewrite dc1394_is_camera() and dc1394_get_sw_version(), that they
>     only call dc1394_get_camera_info() with a temporary struct and
>     return their values from this struct.
>=20
> With this concept, all function interfaces will be kept unchanged, and=20
> the applications using libdc1394 need only a recompile due to the bigger=20
> size of dc1394_camerainfo.
> Any Suggestions?

This is ok for me. I would personally also like to have the
dc1394_misc_info struct merged with dc1394_camera_info. This slightly
break compatibility but as someone pointed out before, we'd better do
this before 1.0...

BTW, there's more than the sw version and spec_id that require a new
access method. Any information lookup in the config ROM should be done
with some tag search function (0x12h for sw version,...). Just to be
sure...

Thanks for volunteering,

Damien

> Regards,
>=20
> Olaf
>=20
>=20
>=20
> --=20
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>=20
>=20
--=20
  _    Damien Douxchamps
 (=B0-   PhD Student / Research Assistant
 //\   Image Processing Group, Telecom Laboratory, UCL, Belgium
 V_/_  http://www.tele.ucl.ac.be/MEMBERS/Douxchamps_Damien_e.html