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VKeybd: exponential pitch-wheel/bend interpolation

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Robin Gareus 2019-12-17 16:47:46 +01:00
parent 37c9a7beb1
commit 9c6d9324bd
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GPG key ID: A090BCE02CF57F04
2 changed files with 19 additions and 15 deletions
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29
gtk2_ardour/virtual_keyboard_window.cc
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@ -564,14 +564,17 @@ VirtualKeyboardWindow::octave_key_event_handler (bool up)
void
VirtualKeyboardWindow::pitch_bend_key_event_handler (int target, bool interpolate)
{
if (_pitch_adjustment.get_value() == target) {
int cur = _pitch_adjustment.get_value();
if (cur == target) {
return;
}
if (interpolate) {
_pitch_bend_target = target;
if (!_bender_connection.connected ()){
_bender_connection = Glib::signal_timeout().connect (sigc::mem_fun(*this, &VirtualKeyboardWindow::pitch_bend_timeout), 40 /*ms*/);
} else {
if (!_bender_connection.connected ()) {
float tc = _pitch_bend_target == 8192 ? .35 : .51;
cur = rintf (cur + tc * (_pitch_bend_target - cur));
_pitch_adjustment.set_value (cur);
_bender_connection = Glib::signal_timeout().connect (sigc::mem_fun(*this, &VirtualKeyboardWindow::pitch_bend_timeout), 20 /*ms*/);
}
return;
}
@ -584,16 +587,16 @@ bool
VirtualKeyboardWindow::pitch_bend_timeout ()
{
int cur = _pitch_adjustment.get_value();
int target;
if (cur < _pitch_bend_target) {
target = std::min (_pitch_bend_target, cur + 1024);
} else if (cur > _pitch_bend_target) {
target = std::max (_pitch_bend_target, cur - 1024);
} else {
target = _pitch_bend_target;
/* a spring would be 2nd order with overshoot,
* but we assume it's critically damped */
float tc = _pitch_bend_target == 8192 ? .35 : .51;
cur = rintf (cur + tc * (_pitch_bend_target - cur));
if (abs (cur - _pitch_bend_target) < 2) {
cur = _pitch_bend_target;
}
_pitch_adjustment.set_value (target);
return _pitch_bend_target != target;
_pitch_adjustment.set_value (cur);
return _pitch_bend_target != cur;
}
void