Testing libgphoto2/gphoto2 is a long winding task and currently requires physical cameras.
There is some testsuite, but it does not test the actual camera driver(s).
The idea was to write a virtual usb device in libgphoto2_port that emulates a PTP camera.
It should do regular behaviour, but it can also be improved to react on errors (like random unplug, bit errors, or even as a malicious device).
The virtual PTP camera can be found in https://github.com/gphoto/libgphoto2/tree/master/libgphoto2_port/vusb
It currently supports:
- basic camera information
- listing files (from a local directory)
- downloading files (from a local directory)
- downloading thumbnails (extracted using libexif)
- deleting files (but only in the in-memory structure)
- querying device properties (battery level and datetime implemented)
- event handling via USB Interrupts
- triggering capture and downloading captured images
- Has achieved "Conformant Device" state according to ISO 15740 ( http://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/f2012/jmv87/site/files/pima15740-2000.pdf page 107) , allowing common download operations.
- The virtual camera is already recognized and usable by gphoto2, digikam, darktable, gtkam, konqueror camera:// ioslave. (It is not visible by shotwell as it uses udev detection which would need a real USB device.)
- Project is finished in scope of Hackweek 13.
Future development steps:
- tethering (external driven events)
- random unplug testing
- data protocol fuzzing
This project is one of its kind!