3 files changed, 35 insertions, 18 deletions

diff --git a/src/libs/client/NodeModel.cpp b/src/libs/client/NodeModel.cpp
index 2f8af584..d47e0b8c 100644
--- a/src/libs/client/NodeModel.cpp
+++ b/src/libs/client/NodeModel.cpp
@@ -18,6 +18,7 @@
 #include CONFIG_H_PATH
 
 #include <cassert>
+#include <cmath>
 #include "interface/Port.hpp"
 #include "NodeModel.hpp"
 #include "PatchModel.hpp"
@@ -30,12 +31,16 @@ NodeModel::NodeModel(Store& store, SharedPtr<PluginModel> plugin, const Path& pa
 	: ObjectModel(store, path, polyphonic)
 	, _plugin_uri(plugin->uri())
 	, _plugin(plugin)
+	, _min_values(0)
+	, _max_values(0)
 {
 }
 
 NodeModel::NodeModel(Store& store, const string& plugin_uri, const Path& path, bool polyphonic)
 	: ObjectModel(store, path, polyphonic)
 	, _plugin_uri(plugin_uri)
+	, _min_values(0)
+	, _max_values(0)
 {
 }
 
@@ -78,6 +83,10 @@ NodeModel::clear()
 {
 	_ports.clear();
 	assert(_ports.empty());
+	delete [] _min_values;
+	delete [] _max_values;
+	_min_values = 0;
+	_max_values = 0;
 }
 
 
@@ -155,17 +164,22 @@ NodeModel::port_value_range(SharedPtr<PortModel> port, float& min, float& max)
 #ifdef HAVE_SLV2
 	// Plugin value first
 	if (_plugin && _plugin->type() == PluginModel::LV2) {
-		Glib::Mutex::Lock(PluginModel::rdf_world()->mutex());
 
-		SLV2Value min_val, max_val;
-		slv2_port_get_range(_plugin->slv2_plugin(),
-			_plugin->slv2_port(port->index()),
-			NULL, &min_val, &max_val);
+		if (!_min_values) {
+		  
+		  Glib::Mutex::Lock(PluginModel::rdf_world()->mutex());
+		  
+		  uint32_t num_lv2_ports = slv2_plugin_get_num_ports(_plugin->slv2_plugin());
+		  _min_values = new float[num_lv2_ports];
+		  _max_values = new float[num_lv2_ports];
+		  slv2_plugin_get_port_ranges(_plugin->slv2_plugin(), 
+					      _min_values, _max_values, 0);
+		}
 
-		if (min_val)
-			min = slv2_value_as_float(min_val);
-		if (max_val)
-			max = slv2_value_as_float(max_val);
+		if (!std::isnan(_min_values[port->index()]))
+		  min = _min_values[port->index()];
+		if (!std::isnan(_max_values[port->index()]))
+		  max = _max_values[port->index()];
 	}
 #endif
 
diff --git a/src/libs/client/NodeModel.hpp b/src/libs/client/NodeModel.hpp
index 9e26daaa..d50926ae 100644
--- a/src/libs/client/NodeModel.hpp
+++ b/src/libs/client/NodeModel.hpp
@@ -85,6 +85,9 @@ protected:
 	PortModelList                   _ports;      ///< List of ports (not a Table to preserve order)
 	string                          _plugin_uri; ///< Plugin URI (if PluginModel is unknown)
 	SharedPtr<PluginModel>          _plugin;     ///< The plugin this node is an instance of
+	
+	float*                          _min_values; ///< The min values for the node ports (only used for LV2 so far)
+	float*                          _max_values; ///< The max values for the node ports (only used for LV2 so far)
 };
 
 
diff --git a/src/libs/engine/LV2Node.cpp b/src/libs/engine/LV2Node.cpp
index a0fdebc0..bdeca701 100644
--- a/src/libs/engine/LV2Node.cpp
+++ b/src/libs/engine/LV2Node.cpp
@@ -149,6 +149,9 @@ LV2Node::instantiate()
 	
 	PortImpl* port = NULL;
 	
+	float* def_values = new float[num_ports];
+	slv2_plugin_get_port_ranges(plug, 0, 0, def_values);
+	
 	for (uint32_t j=0; j < num_ports; ++j) {
 		SLV2Port id = slv2_plugin_get_port_by_index(plug, j);
 
@@ -186,11 +189,9 @@ LV2Node::instantiate()
 			return false;
 		}
 			
-		SLV2Value def, min, max;
-		slv2_port_get_range(plug, id, &def, &min, &max);
-
 		// FIXME: need nice type preserving SLV2Value -> Raul::Atom conversion
-		Atom defatm = (float)((def && slv2_value_is_float(def)) ? slv2_value_as_float(def) : 0.0f);
+		float def = isnan(def_values[j]) ? 0.0f : def_values[j];
+		Atom defatm = def;
 
 		if (direction == INPUT)
 			port = new InputPort(this, port_name, j, _polyphony, data_type, defatm, port_buffer_size);
@@ -198,14 +199,13 @@ LV2Node::instantiate()
 			port = new OutputPort(this, port_name, j, _polyphony, data_type, defatm, port_buffer_size);
 
 		if (direction == INPUT && data_type == DataType::CONTROL)
-			((AudioBuffer*)port->buffer(0))->set(slv2_value_as_float(def), 0);
-
-		slv2_value_free(def);
-		slv2_value_free(min);
-		slv2_value_free(max);
+		  ((AudioBuffer*)port->buffer(0))->set(def, 0);
 
 		_ports->at(j) = port;
 	}
+	
+	delete [] def_values;
+	
 	return true;
 }