I don't think that it's possible to do ioctl's in java. You could always
try writing a native class and access it through jni, just remember to
report exceptions properly :)
~/Chris
David N. Lombard wrote:
> Hisam - wrote:
>> hi,
>> i want to build webcam controller using logitech quickcam in java. I
>> using javax-usb. But i have some problem, i don't know how to control
>> motorize the camera. is to control the motorize camera using control
>> data type?
>
> Well, the ioctl() for the camera does provide for pan and tilt controls.
> So, assuming you can do that from Java, you should be fine. Here are
> the controls in my distro's of pwc-ioctl.h:
>
> /* Defines and structures for Motorized Pan & Tilt */
> #define PWC_MPT_PAN 0x01
> #define PWC_MPT_TILT 0x02
> #define PWC_MPT_TIMEOUT 0x04 /* for status */
>
> /* Set angles; when absolute != 0, the angle is absolute and the
> driver calculates the relative offset for you. This can only
> be used with VIDIOCPWCSANGLE; VIDIOCPWCGANGLE always returns
> absolute angles.
> */
> struct pwc_mpt_angles
> {
> int absolute; /* write-only */
> int pan; /* degrees * 100 */
> int tilt; /* degress * 100 */
> };
>
> /* Range of angles of the camera, both horizontally and vertically.
> */
> struct pwc_mpt_range
> {
> int pan_min, pan_max; /* degrees * 100 */
> int tilt_min, tilt_max;
> };
>
> struct pwc_mpt_status
> {
> int status;
> int time_pan;
> int time_tilt;
> };
>
>
> I have patches for camstream-0.26.3 to support pan and tilt.
>
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