use existing API to find the instrument

[ardour.git] / libs / ardour / send.cc

diff --git a/libs/ardour/send.cc b/libs/ardour/send.cc
index 771473e065ac6e96be8f004f00a006436116312a..ebe8c46c8f9f0061e981f02ef361ae1a807a0d39 100644 (file)
--- a/libs/ardour/send.cc
+++ b/libs/ardour/send.cc
@@ -26,6 +26,7 @@
 #include "ardour/amp.h"
 #include "ardour/buffer_set.h"
 #include "ardour/debug.h"
+#include "ardour/gain_control.h"
 #include "ardour/io.h"
 #include "ardour/meter.h"
 #include "ardour/panner_shell.h"
@@ -76,6 +77,7 @@ Send::Send (Session& s, boost::shared_ptr<Pannable> p, boost::shared_ptr<MuteMas
        , _metering (false)
        , _delay_in (0)
        , _delay_out (0)
+       , _remove_on_disconnect (false)
 {
        if (_role == Listen) {
                /* we don't need to do this but it keeps things looking clean
@@ -87,7 +89,7 @@ Send::Send (Session& s, boost::shared_ptr<Pannable> p, boost::shared_ptr<MuteMas
        //boost_debug_shared_ptr_mark_interesting (this, "send");
 
        boost::shared_ptr<AutomationList> gl (new AutomationList (Evoral::Parameter (GainAutomation)));
-       _gain_control = boost::shared_ptr<Amp::GainControl> (new Amp::GainControl (_session, Evoral::Parameter(GainAutomation), gl));
+       _gain_control = boost::shared_ptr<GainControl> (new GainControl (_session, Evoral::Parameter(GainAutomation), gl));
        add_control (_gain_control);
 
        _amp.reset (new Amp (_session, _("Fader"), _gain_control, true));
@@ -98,6 +100,9 @@ Send::Send (Session& s, boost::shared_ptr<Pannable> p, boost::shared_ptr<MuteMas
        if (panner_shell()) {
                panner_shell()->Changed.connect_same_thread (*this, boost::bind (&Send::panshell_changed, this));
        }
+       if (_output) {
+               _output->changed.connect_same_thread (*this, boost::bind (&Send::snd_output_changed, this, _1, _2));
+       }
 }
 
 Send::~Send ()
@@ -220,6 +225,8 @@ Send::state (bool full)
                node.add_property ("bitslot", buf);
        }
 
+       node.add_property("selfdestruct", _remove_on_disconnect ? "yes" : "no");
+
        node.add_child_nocopy (_amp->state (full));
 
        return node;
@@ -267,6 +274,10 @@ Send::set_state (const XMLNode& node, int version)
                }
        }
 
+       if ((prop = node.property (X_("selfdestruct"))) != 0) {
+               _remove_on_disconnect = string_is_affirmative (prop->value());
+       }
+
        XMLNodeList nlist = node.children();
        for (XMLNodeIterator i = nlist.begin(); i != nlist.end(); ++i) {
                if ((*i)->name() == X_("Processor")) {
@@ -402,3 +413,14 @@ Send::value_as_string (boost::shared_ptr<AutomationControl> ac) const
 {
        return _amp->value_as_string (ac);
 }
+
+void
+Send::snd_output_changed (IOChange change, void* /*src*/)
+{
+       if (change.type & IOChange::ConnectionsChanged) {
+               if (!_output->connected() && _remove_on_disconnect) {
+                       _remove_on_disconnect = false;
+                       SelfDestruct (); /* EMIT SIGNAL */
+               }
+       }
+}