OSC: only use gain change signals if value changes

[ardour.git] / libs / surfaces / osc / osc_cue_observer.cc

diff --git a/libs/surfaces/osc/osc_cue_observer.cc b/libs/surfaces/osc/osc_cue_observer.cc
index 11d62073cf8fd4e3746d05b6c399dacbbe348146..7d027b4f188eb0464972b2bc1b06468936e98de0 100644 (file)
--- a/libs/surfaces/osc/osc_cue_observer.cc
+++ b/libs/surfaces/osc/osc_cue_observer.cc
@@ -49,6 +49,7 @@ OSCCueObserver::OSCCueObserver (boost::shared_ptr<Stripable> s, std::vector<boos
        send_change_message ("/cue/mute", 0, _strip->mute_control());
 
        gain_timeout.push_back (0);
+       _last_gain.push_back (0.0);
        _strip->gain_control()->Changed.connect (strip_connections, MISSING_INVALIDATOR, boost::bind (&OSCCueObserver::send_gain_message, this, 0, _strip->gain_control()), OSC::instance());
        send_gain_message (0, _strip->gain_control());
 
@@ -132,6 +133,7 @@ OSCCueObserver::send_init()
 
                        if (send->gain_control()) {
                                gain_timeout.push_back (0);
+                               _last_gain.push_back (0.0);
                                send->gain_control()->Changed.connect (send_connections, MISSING_INVALIDATOR, boost::bind (&OSCCueObserver::send_gain_message, this, i + 1, send->gain_control()), OSC::instance());
                                send_gain_message (i + 1, send->gain_control());
                        }
@@ -213,6 +215,11 @@ OSCCueObserver::text_with_id (string path, uint32_t id, string val)
 void
 OSCCueObserver::send_gain_message (uint32_t id,  boost::shared_ptr<Controllable> controllable)
 {
+       if (_last_gain[id] != controllable->get_value()) {
+               _last_gain[id] = controllable->get_value();
+       } else {
+               return;
+       }
        string path = "/cue";
        if (id) {
                path = "/cue/send";