More doxygen.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

First pass at adding documentation through Doxygen.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Move all library print statements to a loglevel system.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

touchmouse_process_events_timeout(): obey documentation's semantics

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Use variable names instead of library names explicitly.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Small CMake refactor.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Make qtview example optional.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Move timestamps into device struct.

Before this, if an image update was multiple packets, and one of the
packets was dropped, then we didn't correctly reset the decoder when we
received a packet with a different timestamp if the packets were handled
in different calls to touchmouse_process_events_timeout().

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Reorganize directory tree, add a Qt graphical demo.

I'll probably have to redo some more CMake stuff to make the Qt demo
optional.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

touchmouse.c: reset the decoder state when a decode error arises.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Make the timeouts behave as they ought.

Each platform has its own API for high resolution timers, so I added an
abstraction function that returns a monotonically increasing number in
nanoseconds.

On Windows, we use QueryPerformanceCounter()
On OSX, we use mach_absolute_time()
On Linux, we use clock_gettime() with CLOCK_MONOTONIC

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Fix build on OSX.

Add LDFLAGS for the shared library via CMAKE_SHARED_LINKER_FLAGS.
Also actually link against the library we build.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Windows is annoying.

Declare all the things in libtouchmouse.h with dllexport.
Also put output library in a lib folder

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Pull apart library and example.

An API now exists, as does a separate program that performs the same
demonstration task for a limited number of updates.  A shared library will be
built.  Timeout behavior needs to be implemented.

Forward progress.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Make git ignore the build folder

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

First pass at a CMakeLists.txt to support building on Windows, OSX, and Linux.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Make OSX actually find the mouse.

HIDAPI on OSX always returns -1 as the interface_number for all devices,
so we use usage_page and usage to pick the right device.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Only enumerate devices that match the right VendorID/ProductID.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Print errors to stderr.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Switch from libusb-1.0 to HIDAPI.

HIDAPI ( http://www.signal11.us/oss/hidapi/ ) has a very permissive
license, which makes it very convenient to embed into our project.
It features separate backends to support HID on different platforms.

Right now, the only platform the Makefile will build on is Linux,
but we can fix that in due time.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>

Initial commit of a proof-of-concept TouchMouse driver built on libusb.

I'll want to give this an actual API, rework it atop libhid instead of libusb
for other platforms (libusb on OSX can't unbind the HID driver), and do lots
of cleanup, but first let's get this in git.

Signed-off-by: Drew Fisher <drew.m.fisher@gmail.com>