Signed-off-by: Jérôme Benoit <jerome.benoit@grenouille.com>

- Respect Micah coding style is order to simplify the merge.

Signed-off-by: Jérôme Benoit <jerome.benoit@grenouille.com>

Signed-off-by: Jérôme Benoit <jerome.benoit@grenouille.com>

Signed-off-by: Jérôme Benoit <jerome.benoit@grenouille.com>

Signed-off-by: Jérôme Benoit <jerome.benoit@grenouille.com>

I will need to maintain several fcserver installations and that patch will
help me to do so.

I've not tested yet a from scratch cloning and building but as far as
the directories for each submodule is not is the main repository, the
code is doing the right thing for that case ;-)

Signed-off-by: Jérôme Benoit <jerome.benoit@grenouille.com>

I'd been assuming that the OS always copied our USB transfer buffer at submit-time. Turns out that this is true for Linux but not for Windows or Mac. This caused tearing when fcserver received a new frame while previous frame(s) were still queued in the USB host controller.

Fixed this by copying to a per-transfer buffer on Windows and Mac. Linux is unaffected. We avoid performing an additional copy there.

If we issue a short write, libwebsocket handles it kinda ungracefully and we have no idea when to close the socket. Instead of letting libwebsocket copy our content into a temporary buffer, we can just give it smaller pieces.

This lets us uniquely identify a particular device connection instance.

This keeps the size of the fcserver binary down.