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gphoto / libgphoto2

The libgphoto2 camera access and control library.
GNU Lesser General Public License v2.1
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gp_camera_wait_for_event() timeout value has a minimum effective value that is not documented #612

Open notnot opened 3 years ago

notnot commented 3 years ago

I am handling the camera events and noticed that the timeout given in gp_camera_wait_for_event() is not honored if the value is too small. If you specify a timeout of 1 ms, the actual timeout is ~300 ms. Timeout values of >- 300 are behaving as they should. I think this should be documented in the API reference?

Name the camera Sony Alpha-A6300 (Control) usb:001,046

libgphoto2 and gphoto2 version gphoto2 2.5.20 gcc, popt(m), exif, no cdk, no aa, jpeg, no readline libgphoto2 2.5.20 all camlibs, gcc, ltdl, EXIF libgphoto2_port 0.12.0 iolibs: disk ptpip serial usb1 usbdiskdirect usbscsi, gcc, ltdl, USB, serial without locking

To Reproduce call gp_camera_wait_for_event() with a timeout of for instance 1 ms, and time how long the call takes.

msmeissn commented 3 years ago

yes, currently the interrupt wait is 300ms .. hmm. i will see what I can do , either adjust the doc