+ bool from_list = alist() && alist()->automation_playback();
+ return Control::get_double (from_list, _session.transport_sample());
+}
+
+double
+AutomationControl::get_save_value() const
+{
+ /* save user-value, not incl masters */
+ return Control::get_double ();
+}
+
+void
+AutomationControl::pre_realtime_queue_stuff (double val, PBD::Controllable::GroupControlDisposition gcd)
+{
+ if (_group && _group->use_me (gcd)) {
+ _group->pre_realtime_queue_stuff (val);
+ } else {
+ do_pre_realtime_queue_stuff (val);
+ }
+}
+
+void
+AutomationControl::set_value (double val, PBD::Controllable::GroupControlDisposition gcd)
+{
+ if (!writable()) {
+ return;
+ }
+
+ /* enforce strict double/boolean value mapping */
+
+ if (_desc.toggled) {
+ if (val != 0.0) {
+ val = 1.0;
+ }
+ }
+
+ if (check_rt (val, gcd)) {
+ /* change has been queued to take place in an RT context */
+ return;
+ }
+
+ if (_group && _group->use_me (gcd)) {
+ _group->set_group_value (shared_from_this(), val);
+ } else {
+ actually_set_value (val, gcd);
+ }
+}
+
+ControlList
+AutomationControl::grouped_controls () const
+{
+ if (_group && _group->use_me (PBD::Controllable::UseGroup)) {
+ return _group->controls ();
+ } else {
+ return ControlList ();
+ }
+}
+
+void
+AutomationControl::automation_run (samplepos_t start, pframes_t nframes)
+{
+ if (!automation_playback ()) {
+ return;
+ }
+
+ assert (_list);
+ bool valid = false;
+ double val = _list->rt_safe_eval (start, valid);
+ if (!valid) {
+ return;
+ }
+ if (toggled ()) {
+ const double thresh = .5 * (_desc.upper - _desc.lower);
+ set_value_unchecked (val >= thresh ? _desc.upper : _desc.lower);
+ } else {
+ set_value_unchecked (val);
+ }
+}
+
+/** Set the value and do the right thing based on automation state
+ * (e.g. record if necessary, etc.)
+ * @param value `user' value
+ */
+void
+AutomationControl::actually_set_value (double value, PBD::Controllable::GroupControlDisposition gcd)
+{
+ boost::shared_ptr<AutomationList> al = alist ();
+ const samplepos_t pos = _session.transport_sample();
+ bool to_list;
+
+ /* We cannot use ::get_value() here since that is virtual, and intended
+ to return a scalar value that in some way reflects the state of the
+ control (with semantics defined by the control itself, since it's
+ internal state may be more complex than can be fully represented by
+ a single scalar).
+
+ This method's only job is to set the "user_double()" value of the
+ underlying Evoral::Control object, and so we should compare the new
+ value we're being given to the current user_double().
+
+ Unless ... we're doing automation playback, in which case the
+ current effective value of the control (used to determine if
+ anything has changed) is the one derived from the automation event
+ list.
+ */
+ float old_value = Control::user_double();
+
+ if (al && al->automation_write ()) {
+ to_list = true;
+ } else {
+ to_list = false;
+ }
+
+ Control::set_double (value, pos, to_list);
+
+ if (old_value != (float)value) {
+#if 0
+ AutomationType at = (AutomationType) _parameter.type();
+ std::cerr << "++++ Changed (" << enum_2_string (at) << ", " << enum_2_string (gcd) << ") = " << value
+ << " (was " << old_value << ") @ " << this << std::endl;
+#endif
+
+ Changed (true, gcd);
+ if (!al || !al->automation_playback ()) {
+ _session.set_dirty ();
+ }
+ }
+}
+
+void
+AutomationControl::set_list (boost::shared_ptr<Evoral::ControlList> list)
+{
+ Control::set_list (list);
+ Changed (true, Controllable::NoGroup);
+}
+
+void
+AutomationControl::set_automation_state (AutoState as)
+{
+ if (flags() & NotAutomatable) {
+ return;
+ }
+ if (alist() && as != alist()->automation_state()) {
+
+ const double val = get_value ();
+
+ alist()->set_automation_state (as);
+ if (_desc.toggled) {
+ Changed (false, Controllable::NoGroup); // notify slaves, update boolean masters
+ return; // No watch for boolean automation
+ }
+
+ if (as == Write) {
+ AutomationWatch::instance().add_automation_watch (shared_from_this());
+ } else if (as & (Touch | Latch)) {
+ if (alist()->empty()) {
+ Control::set_double (val, _session.current_start_sample (), true);
+ Control::set_double (val, _session.current_end_sample (), true);
+ Changed (true, Controllable::NoGroup);
+ }
+ if (!touching()) {
+ AutomationWatch::instance().remove_automation_watch (shared_from_this());
+ } else {
+ /* this seems unlikely, but the combination of
+ * a control surface and the mouse could make
+ * it possible to put the control into Touch
+ * mode *while* touching it.
+ */
+ AutomationWatch::instance().add_automation_watch (shared_from_this());
+ }
+ } else {
+ AutomationWatch::instance().remove_automation_watch (shared_from_this());
+ Changed (false, Controllable::NoGroup);
+ }
+ }
+}
+
+void
+AutomationControl::start_touch (double when)
+{
+ if (!_list || touching ()) {
+ return;
+ }
+
+ if (alist()->automation_state() & (Touch | Latch)) {
+ /* subtle. aligns the user value with the playback and
+ * use take actual value (incl masters).
+ *
+ * Touch + hold writes inverse curve of master-automation
+ * using AutomationWatch::timer ()
+ */
+ AutomationControl::actually_set_value (get_value (), Controllable::NoGroup);
+ alist()->start_touch (when);
+ if (!_desc.toggled) {
+ AutomationWatch::instance().add_automation_watch (shared_from_this());
+ }
+ set_touching (true);
+ }