The driver seems to have relied on the device to be fully
deactivated and activated again for each capture. This is not the case
during enroll, and as such in can cause issues.
Try fixing this by splitting out the last few commands send to the
device and assuming that this starts the capture.
Fixes: #306
The cancellable needs to be free'ed at deactivation. Also free it if we
run into a fatal error, which then in turn indicates that the device is
deactivated already.
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
When a transfer is completed, we automatically unref it since we can't
consider it valid anymore since this point.
Update the drivers not to free the transfer after submitting anymore.
The state was always AWAIT_FINGER and it was never used by any driver
(except for error checking). So remove it, in particular as a correct
state change will be done after activation anyway.
The only driver with code that actually did anything based on this was
the URU4000 driver. However, all it did was an explicit state change
execution. This is not necessary, as the state_change handler is called
anyway (i.e. we now only write the AWAIT_FINGER register once rather
than twice).
Manual changes plus:
@ init @
identifier driver_name;
identifier activate_func;
@@
struct fp_img_driver driver_name = {
...,
.activate = activate_func,
...,
};
@ remove_arg @
identifier dev;
identifier state;
identifier init.activate_func;
@@
activate_func (
struct fp_img_dev *dev
- , enum fp_imgdev_state state
)
{
<...
- if (state != IMGDEV_STATE_AWAIT_FINGER_ON) { ... }
...>
}
Remove all the headers already included through "fp_internal.h" such as
<libusb.h> and <errno.h>, include "assembling.h" and "driver_ids.h" there
as well to avoid doing it in (almost) every driver.
Some scanners provide hardware assistance in frame assemling, i.e.
horizontal and vertical offset to previous frame is provided. This
commit improves code to utilise that assistance. Sensors without
hardware assistance will use software algorithm, which was also
improved to do search in horizontal direction.
AES3500 and AES4000 are pretty similar devices, have same
command send, the only difference is in image size and init sequence.
Extract common routines from AES4K to be used later in AES3500 driver
https://bugs.freedesktop.org/show_bug.cgi?id=64351
