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bcce8876e2
The change_state function is called synchronously from the image_captured callback. This means that deactivation of the device happens during the img_cb function, causing the USB transfer to be re-registered even though the device is already deactivating. There are various ways to fix this, but it makes sense to directly bind the cancellation to the deactivation. So create a cancellable that we cancel at deactivation time, and make sure we always deactivate by going through cancellation. closes: #306
libfprint ========= libfprint is part of the fprint project: https://fprint.freedesktop.org/ libfprint was originally developed as part of an academic project at the University of Manchester with the aim of hiding differences between different consumer fingerprint scanners and providing a single uniform API to application developers. The ultimate goal of the fprint project is to make fingerprint scanners widely and easily usable under common Linux environments. The academic university project runs off a codebase maintained separately from this one, although I try to keep them as similar as possible (I'm not hiding anything in the academic branch, it's just the open source release contains some commits excluded from the academic project). THE UNIVERSITY OF MANCHESTER DOES NOT ENDORSE THIS THIS SOFTWARE RELEASE AND IS IN NO WAY RESPONSIBLE FOR THE CODE CONTAINED WITHIN, OR ANY DAMAGES CAUSED BY USING OR DISTRIBUTING THE SOFTWARE. Development does not happen on university computers and the project is not hosted at the university either. For more information on libfprint, supported devices, API documentation, etc., see the homepage: https://fprint.freedesktop.org/ libfprint is licensed under the GNU LGPL version 2.1. See the COPYING file for the license text. Section 6 of the license states that for compiled works that use this library, such works must include libfprint copyright notices alongside the copyright notices for the other parts of the work. We have attempted to make this process slightly easier for you by grouping these all in one place: the AUTHORS file. libfprint includes code from NIST's NBIS software distribution: http://fingerprint.nist.gov/NBIS/index.html We include bozorth3 from the US export controlled distribution. We have determined that it is fine to ship bozorth3 in an open source project, see https://fprint.freedesktop.org/us-export-control.html ## Historical links Older versions of libfprint are available at: https://sourceforge.net/projects/fprint/files/ Historical mailing-list archives: http://www.reactivated.net/fprint_list_archives/ Historical website: http://web.archive.org/web/*/https://www.freedesktop.org/wiki/Software/fprint/