Less weak plugin preset system (maybe AU preset stuff can use the 'normal' thing instead of being all weird now?).

LV2 preset support as implemented in svn calf plugins (experimental extension).


git-svn-id: svn://localhost/ardour2/branches/3.0@4547 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 44 insertions, 2 deletions

diff --git a/libs/ardour/lv2_plugin.cc b/libs/ardour/lv2_plugin.cc
index 906edb3bda..03e3ea5bc2 100644
--- a/libs/ardour/lv2_plugin.cc
+++ b/libs/ardour/lv2_plugin.cc
@@ -119,8 +119,10 @@ LV2Plugin::init (LV2World& world, SLV2Plugin plugin, nframes_t rate)
 	uint32_t latency_port = (latent ? slv2_plugin_get_latency_port_index(plugin) : 0);
 
 	for (uint32_t i = 0; i < num_ports; ++i) {
+		SLV2Port port = slv2_plugin_get_port_by_index(plugin, i);
+		SLV2Value sym = slv2_port_get_symbol(_plugin, port);
+		_port_indices.insert(std::make_pair(slv2_value_as_string(sym), i));
 		if (parameter_is_control(i)) {
-			SLV2Port port = slv2_plugin_get_port_by_index(plugin, i);
 			SLV2Value def;
 			slv2_port_get_range(plugin, port, &def, NULL, NULL);
 			_defaults[i] = def ? slv2_value_as_float(def) : 0.0f;
@@ -274,10 +276,50 @@ LV2Plugin::get_state()
 	return *root;
 }
 
+vector<Plugin::PresetRecord>
+LV2Plugin::get_presets()
+{
+	vector<PresetRecord> result;
+	SLV2Results presets = slv2_plugin_query_sparql(_plugin,
+			"PREFIX lv2p: <http://lv2plug.in/ns/dev/presets#>\n"
+			"PREFIX dc:  <http://dublincore.org/documents/dcmi-namespace/>\n"
+			"SELECT ?p ?name WHERE { <> lv2p:hasPreset ?p . ?p dc:title ?name }\n");
+	for (; !slv2_results_finished(presets); slv2_results_next(presets)) {
+		SLV2Value uri  = slv2_results_get_binding_value(presets, 0);
+		SLV2Value name = slv2_results_get_binding_value(presets, 1);
+		PresetRecord rec(slv2_value_as_string(uri), slv2_value_as_string(name));
+		result.push_back(rec);
+		this->presets.insert(std::make_pair(slv2_value_as_string(uri), rec));
+	}
+	slv2_results_free(presets);
+	return result;
+}
+
+bool
+LV2Plugin::load_preset(const string uri)
+{
+	const string query = string(
+			"PREFIX lv2p: <http://lv2plug.in/ns/dev/presets#>\n"
+			"PREFIX dc:  <http://dublincore.org/documents/dcmi-namespace/>\n"
+			"SELECT ?sym ?val WHERE { <") + uri + "> lv2:port ?port . "
+				" ?port lv2:symbol ?sym ; lv2p:value ?val . }";
+	SLV2Results values = slv2_plugin_query_sparql(_plugin, query.c_str());
+	for (; !slv2_results_finished(values); slv2_results_next(values)) {
+		SLV2Value sym  = slv2_results_get_binding_value(values, 0);
+		SLV2Value val = slv2_results_get_binding_value(values, 1);
+		if (slv2_value_is_float(val)) {
+			uint32_t index = _port_indices[slv2_value_as_string(sym)];
+			set_parameter(index, slv2_value_as_float(val));
+		}
+	}
+	slv2_results_free(values);
+	return true;
+}
+
 bool
 LV2Plugin::save_preset (string name)
 {
-	return Plugin::save_preset (name, "lv2");
+	return false;
 }
 	
 bool