gcc can recognize various regexps in comments. Since C++17 provides
[[fallthrough]], using /* fallthrough */ consistently seems
appropriate until we switch to C++17.
see also https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
This resolves a circular dependency:
libardour calls methods from libardour_cp and vice versa.
Since 9bb2f2bb libardour is also calling active() and that method
needs to be forced to use late binding. -- compare to b9bbea7174
USB stack may not be available on some systems, e.g. unit-test VM.
When libusb_init(0) fails to create default context, further calls
into the libusb API will cause segfaults.
This fixes a potentially undefined branch if the USB device list is empty.
dev is NULL, the loop is never entered, 'r' isn't set.
if (!dev && !r) is undefined.
Add support for smoothing, ignore message when controllers are
not in sync to avoid discontinuous jumps.
This is mainly useful for Mackie-like devices that use pitch-bend
messages for faders.
see also https://discourse.ardour.org/t/feature-lazy-sliders/100961
"last_controllable_value" is using midi value range (0..127).
It is used to compare received midi-value with the actual controllable
for non-motorized surfaces, and this change allows the first
event to already be in_sync.
Previously the first MIDI-event was usually ignored (because
last_controllable_value was out of bounds or didn't match the 0..127
range.
Since we (since ddfc37e4) set the UserDown flag for the User button actions, we
need to set it also when we lookup actions when saving the state.
Furthermore, we need also look for the UserDown flag, when we set the state
of the configuration combos for the User button.
Continued work after e9b36f2bea. Prefer a shared_ptr<>.
MIDIControllable::write_feedback() runs in realtime context, directly
from the main process-thread. Synchronizing weak-pointers and deletion
across threads does not work reliably. Retaining a shared_ptr<> for
controllables that are in use can solve this.
This fixes a race-condition when a controllable is deleted
while sending feedback to the device.
Previously there was a race-condition MIDIControllable::write_feedback()
triggered from rt-thread, processed in Surface-thread and deleting
a route or processor.
This is a first step, currently state-restore is not fully functional
session->controllable_by_id() does not cover all Controllables.
