[gphoto-devel] Libgphoto2 for embedded system

[vincent <vi...@gm...>]

Dear,

I am a team member which developing an embedded system. The system is
composed of an ARM type processor and varied peripheral, including a
Canon G10 numerical camera.
The main program should have to manage the camera and the others
peripheral in dispatching his workload in order to manage all his
peripheral at the same times.
The program should have to pictures shooting and to download it. I would
like, for this, to use the “libgphoto2” library managing the PTP
protocol.

After library testing, I have difficulties to manage the pictures
downloading. The “gp_camera_file_get” function return control the
program only at the end, so this downloading time is too much important
comparing at the others program tasks.
To have more time for the other tasks execution, I would like to cut the
downloading in several phases. I would like, download the pictures parts
in following the size that I have defined before.

The solution, I thought, is to develop a new function similar to
“gp_camera_file_get” for which I pass a parameter, a structure including
the downloading context :
	- File identifier
	- Packet size for download (int)
	- Complete file size (int)
	- Size of downloaded data (int)
	- ...
>From the main program, I will be able to test if remaining data to be
downloaded, and call the function in indicating the size of data to
download.

- Have you a more simply solution to offer me ? 
- Do you think this solution is well and feasible ?
- Do you think it would be interesting to integrate this functionality
in the library ?

I am looking forward to hearing from you,

Regards,
  
-- 
Vincent BOURGEOIS