Adding support to enumeration parameter type in lv2 module

src/modules/jackrack/factory.c

@@ -264,7 +264,62 @@ static void lv2_add_port_to_metadata(mlt_properties p, lv2_plugin_desc_t *desc,
     }
 
     if (LADSPA_IS_HINT_ENUMERATION(hint_descriptor)) {
-        /* WIP */
+      mlt_properties_set(p, "type", "string");
+
+      char *str_ptr = strchr(desc->uri, '<');
+      while (str_ptr != NULL) {
+        *str_ptr++ = ':';
+        str_ptr = strchr(str_ptr, '<');
+      }
+
+      LilvNode* puri_temp = lilv_new_uri(g_lv2_plugin_mgr->lv2_world, desc->uri);
+
+      str_ptr = strchr(desc->uri, ':');
+      while (str_ptr != NULL) {
+        *str_ptr++ = '<';
+        str_ptr = strchr(str_ptr, ':');
+      }
+
+      const LilvPlugin* p_temp = lilv_plugins_get_by_uri(g_lv2_plugin_mgr->plugin_list, puri_temp);
+      const LilvPort *port_temp = lilv_plugin_get_port_by_index(p_temp, j);
+
+      lilv_node_free(puri_temp);
+
+      mlt_properties values_temp = mlt_properties_new();
+      mlt_properties_set_data(p,
+			      "values",
+			      values_temp,
+			      0,
+			      (mlt_destructor) mlt_properties_close,
+			      NULL);
+
+      // Fill scalePoints Map
+      LilvScalePoints* sp = lilv_port_get_scale_points(p_temp, port_temp);
+      if (sp) {
+	LILV_FOREACH (scale_points, s, sp) {
+	  const LilvScalePoint* p   = lilv_scale_points_get(sp, s);
+	  const LilvNode*       val = lilv_scale_point_get_value(p);
+	  if (!lilv_node_is_float(val) && !lilv_node_is_int(val)) {
+	    continue;
+	  }
+
+	  const float f = lilv_node_as_float(val);
+
+
+	  char key_temp[20];
+
+	  if (lilv_node_is_float(val)) {
+	    snprintf(key_temp, 20, "%f", f);
+	  } else if (lilv_node_is_int(val)) {
+	    snprintf(key_temp, 20, "%d", (int) f);
+	  }
+
+	  mlt_properties_set(values_temp, key_temp, lilv_node_as_string(lilv_scale_point_get_label(p)));
+
+	}
+
+	lilv_scale_points_free(sp);
+      }
     }
 
     if (LADSPA_IS_HINT_LOGARITHMIC(hint_descriptor))
@@ -412,6 +467,10 @@ MLT_REPOSITORY
 #ifdef WITH_LV2
     g_lv2_plugin_mgr = lv2_mgr_new();
 
+    char global_lv2_world[20];
+    snprintf (global_lv2_world, 20, "%p", g_lv2_plugin_mgr->lv2_world);
+    mlt_environment_set ("global_lv2_world", global_lv2_world);
+
     for (list = g_lv2_plugin_mgr->all_plugins; list; list = g_slist_next(list)) {
         lv2_plugin_desc_t *desc = (lv2_plugin_desc_t *) list->data;
         char *s = NULL;

src/modules/jackrack/lv2_plugin.c

@@ -38,6 +38,8 @@
 
 #define CONTROL_FIFO_SIZE 128
 
+extern char *mlt_environment(const char *name);
+
 extern const LV2_Feature *features[];
 
 #ifdef WITH_JACK
@@ -272,8 +274,19 @@ static int lv2_plugin_instantiate(const LilvPlugin *plugin,
                                   gint copies,
                                   LilvInstance **instances)
 {
-    gint i;
+  char *lv2context_can_ui = mlt_environment ("lv2context_can_ui");
+  if (lv2context_can_ui != NULL)
+    {
+      /* Video editors and other hosts that support custom GUI should use mlt_environment_set ("lv2context_can_ui", "1")
+	 to inform mlt lv2 plugin manager and set UI features and extensions if not set.
+       */
+      if (lv2context_can_ui[0] == '1')
+	{
+	  //WIP: if support UI
+	}
+    }
 
+    gint i;
     for (i = 0; i < copies; i++) {
         instances[i] = lilv_plugin_instantiate(plugin, lv2_sample_rate, features);
 

src/modules/jackrack/plugin_mgr.c

@@ -57,6 +57,7 @@
 #include <lv2/resize-port/resize-port.h>
 #include <lv2/ui/ui.h>
 #include <lv2/worker/worker.h>
+#include <lv2/state/state.h>
 
 #include "lv2_urid_helper.h"