This opportunistically uses a cache of 'fingerprints' for already
downloaded dives.
As we download data from a dive computer, we save the fingerprint and
dive ID of the most recent dive in a per-divecopmputer fingerprint cache
file.
The next time we download from that dive computer, we will load the
cache file for that dive computer if it exists, verify that we still
have the dive that is referenced in that cachefile, and if so use the
fingerprint to let libdivecomputer potentially stop downloading dives
early.
This doesn't much matter for most dive computers, but some (like the
Scubapro G2) are not able to download one dive at a time, and need the
fingerprint to avoid doing a full dump. That is particularly noticeable
over bluetooth, where a full dump can be very slow.
NOTE! The fingerprint cache is a separate entity from the dive log
itself. Unlike the dive log, it doesn't synchronize over the cloud, so
if you download using different clients (say, your phone and your
laptop), the fingerprint cache entries are per device.
So you may still end up downloading dives you already have, because the
fingerprint code basically only works to avoid duplicate downloads on
the same installation.
Also, note that we only have a cache of one single entry per dive
computer and downloader, so if you download dives and then don't save
the end result, the fingerprint will now point to a dive that you don't
actually have in your dive list. As a result, next time you download,
the fingerprint won't match any existing dive, and we'll resort to the
old non-optimized behavior.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This creates a new libdivecomputer_device_open() helper, and makes
downloading and configuration use it to open the dive computer device
using the proper protocol.
The IRDA case was tested by Sébastien Dugué - I had initially left it
undone believing that "nobody uses IRDA".
Reported-and-tested-by: Sébastien Dugué <sebastien.dugue.subsurface@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This converts our old custom IO model to the new model that
libdivecomputer introduced. This is partly based on Jef's rough patch
to make things build, with further work by me.
The FTDI code is temporarily disabled here, because it will need to be
integrated with the new way of opening devices.
The ble_serial code goes away entirely, since now libdivecomputer knows
about BLE transport natively, and doesn't need to have any serial
wrapper around it.
Signed-off-by: Jef Driesen <jef@libdivecomputer.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
I hate changing the IO interfaces this often, but when I converted the
custom serial interface to the more generic custom IO interface, I
intentionally left the legacy serial operations alone, because I didn't
want to change something I didn't care about.
But it turns out that leaving them with the old calling convention
caused extra problems when converting the bluetooth serial code to have
the BLE GATT packet fall-back, which requires mixing two kinds of
operations.
Also, the packet_open() routine was passed a copy of the 'dc_context_t',
which makes it possible to update the 'dc_custom_io_t' field on the fly
at open time. That makes a lot of chaining operations much simpler,
since now you can chain the 'custom_io_t' at open time and then
libdivecomputer will automatically call the new routines instead of the
old ones.
That dc_context_t availability gets rid of all the
if (device && device->ops)
return device->ops->serial_xyz(..);
hackery inside the rfcomm routines - now we can just at open time do a simple
dc_context_set_custom_io(context, &ble_serial_ops);
to switch things over to the BLE version of the serial code instead.
Finally, SSRF_CUSTOM_IO v2 added an opaque "dc_user_device_t" pointer
argument to the custom_io descriptor, which gets filled in as the
custom_io is registered with the download context. Note that unlike
most opaque pointers, this one is opaque to *libdivecomputer*, and the
type is supposed to be supplied by the user.
We define the "dc_user_device_t" as our old "struct device_data_t",
making it "struct user_device_t" instead. That means that the IO
routines now get passed the device info showing what device they are
supposed to download for.
That, in turn, means that now our BLE GATT open code can take the device
type it opens for into account if it wants to. And it will want to,
since the rules for Shearwater are different from the rules for Suunto,
for example.
NOTE! Because of the interface change with libdivecomputer, this will
need a flag-day again where libdivecomputer and subsurface are updated
together. It may not be the last time, either.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Instead of being "custom serial", it's a IO model that allows serial or
packet modes, independently of each other (ie you can have a bluetooth
device that does serial over BT rfcomm and packet-based communication
over BLE GATT with the same serial operations that describe both cases).
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This removes our own declaration of dc_descriptor_t and all our accesses
to its internals, and switches to use the libdivecomputer functions to
access those instead.
Signed-off-by: Anton Lundin <glance@acc.umu.se>
This renames and cleans up ostc_get_data_descriptor into get_descriptor,
for more generic use.
Signed-off-by: Anton Lundin <glance@acc.umu.se>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This is for later reuse of that function in other source files.
Signed-off-by: Anton Lundin <glance@acc.umu.se>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This adds a simple cp2130 userspace driver. Its probably unusable in the
real world but its a great base to build upon.
Signed-off-by: Anton Lundin <glance@acc.umu.se>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This rewrites the custom serial code to use the new api which I
implemented in the Subsurface-branch of libdivecomputer.
This is a bit to big patch but I haven't had the time to break it down
into more sensible patches.
This rewrite enables us to support more ftdi based divecomputer
communication and is tested with both a OSTC3, OSTC2N and a Suunto
Vyper, all over the libftdi driver.
The bluetooth code paths are tested to, and should work as before.
Signed-off-by: Anton Lundin <glance@acc.umu.se>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Having subsurface-core as a directory name really messes with
autocomplete and is obviously redundant. Simmilarly, qt-mobile caused an
autocomplete conflict and also was inconsistent with the desktop-widget
name for the directory containing the "other" UI.
And while cleaning up the resulting change in the path name for include
files, I decided to clean up those even more to make them consistent
overall.
This could have been handled in more commits, but since this requires a
make clean before the build, it seemed more sensible to do it all in one.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
2016-04-04 22:33:58 -07:00
Renamed from subsurface-core/libdivecomputer.h (Browse further)
