Save symbols along with indices for LV2 ports (as required by LV2r3).

git-svn-id: svn://localhost/ardour2/branches/2.0-ongoing@4157 d708f5d6-7413-0410-9779-e7cbd77b26cf

3 files changed, 23 insertions, 0 deletions

diff --git a/libs/ardour/ardour/lv2_plugin.h b/libs/ardour/ardour/lv2_plugin.h
index be584b76c3..de8eb616a1 100644
--- a/libs/ardour/ardour/lv2_plugin.h
+++ b/libs/ardour/ardour/lv2_plugin.h
@@ -65,6 +65,8 @@ class LV2Plugin : public ARDOUR::Plugin
 	SLV2Plugin slv2_plugin()         { return _plugin; }
 	SLV2UI     slv2_ui()             { return _ui; }
 	SLV2Port   slv2_port(uint32_t i) { return slv2_plugin_get_port_by_index(_plugin, i); }
+
+	const char* port_symbol(uint32_t port);
 	
 	const LV2_Feature* const* features() { return _features; }
 	
diff --git a/libs/ardour/insert.cc b/libs/ardour/insert.cc
index 0227da8246..be4de27b01 100644
--- a/libs/ardour/insert.cc
+++ b/libs/ardour/insert.cc
@@ -627,6 +627,13 @@ PluginInsert::state (bool full)
 		snprintf(buf, sizeof(buf), "%" PRIu32, *x);
 		child->add_property("number", string(buf));
 
+#ifdef HAVE_SLV2
+		LV2Plugin* lv2p = dynamic_cast<LV2Plugin*>(_plugins[0].get());
+		if (lv2p) {
+			child->add_property("symbol", string(lv2p->port_symbol(*x)));
+		}
+#endif
+
 		child->add_child_nocopy (automation_list (*x).state (full));
 		autonode->add_child_nocopy (*child);
 	}
diff --git a/libs/ardour/lv2_plugin.cc b/libs/ardour/lv2_plugin.cc
index 3b3cfa2594..32160abb58 100644
--- a/libs/ardour/lv2_plugin.cc
+++ b/libs/ardour/lv2_plugin.cc
@@ -189,6 +189,19 @@ LV2Plugin::default_value (uint32_t port)
 	return _defaults[port];
 }	
 
+const char*
+LV2Plugin::port_symbol (uint32_t index)
+{
+	SLV2Port port = slv2_plugin_get_port_by_index(_plugin, index);
+	if (!port) {
+		error << name() << ": Invalid port index " << index << endmsg;
+	}
+
+	SLV2Value sym = slv2_port_get_symbol(_plugin, port);
+	return slv2_value_as_string(sym);
+}
+
+
 void
 LV2Plugin::set_parameter (uint32_t which, float val)
 {
@@ -251,6 +264,7 @@ LV2Plugin::get_state()
 			child = new XMLNode("port");
 			snprintf(buf, sizeof(buf), "%u", i);
 			child->add_property("number", string(buf));
+			child->add_property("symbol", port_symbol(i));
 			snprintf(buf, sizeof(buf), "%+f", _shadow_data[i]);
 			child->add_property("value", string(buf));
 			root->add_child_nocopy (*child);