RE: targetting a specific camera when using libgphoto

Picture Transfer Protocol over Internet Protocol.




-----Original Message-----
From: Marcus Meissner [mailto:meissner@xxxxxxx] 
Sent: Wednesday, February 15, 2006 10:14 AM
To: Patrick Laplante
Cc: 'Marcus Meissner'; gphoto-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: [gphoto-devel] targetting a specific camera when using
libgphoto

On Wed, Feb 15, 2006 at 09:51:49AM -0500, Patrick Laplante wrote:
> Sorry if I may sound stupid in my email but as you can see I am fairly new
> to this whole open source thingy!  
> 
> The project I am on right now, the customers requested me to use gphoto2
and
> they want me to support usb camera now and will want Ethernet(wireless)
> camera support later.

> To answer to your post, that is kind of a *hack*.
> 
> What I don't understand is why GUI apps care about the usb: thing.
> 
> Let's look at the following use case where a use plugs in a usb camera:
> 
> -The os generate some form of event from kernel to user space (on camera
> plug).  
> -The event contains the device path that one can open and talk to the
> device.  
> -That path is unique per devices.
> -The user space event handler spawns your GUI(or non GUI) app with the
> device path.
> -The GUI(or non GUI) app can then use that path to communicate with the
> camera.
> 
> So one could use the --port options or a new options --dev-path!
> 
> I've looked into what it would take to add an api to libgphoto2 where I
> could specify the port and I think that it should be an easy task.  Now
what
> if I modify the library, do I need to push it back to you (per GPL)?

Not necessarily, you just need to publish the source along with your
binaries.

> I am also looking at adding a libgphoto2_port to support Ethernet camera.

What kind of camera is this? PTP/IP?

Ciao, Marcus



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