Tweak LV2 float parameter printing

diff --git a/libs/ardour/lv2_plugin.cc b/libs/ardour/lv2_plugin.cc
index d0fe39301d830dd32810f011d28439dbc7c02a66..4441a582692cb002bf289f9b9378d1a24229767b 100644 (file)
--- a/libs/ardour/lv2_plugin.cc
+++ b/libs/ardour/lv2_plugin.cc
@@ -1804,7 +1804,16 @@ load_parameter_descriptor_units(LilvWorld* lworld, ParameterDescriptor& desc, co
                LilvNode* render = get_value(lworld, unit, _world.units_render);
                if (render) {
                        desc.print_fmt = lilv_node_as_string(render);
-                       replace_all (desc.print_fmt, "%f", "%.2f");
+                       /* override lilv's default "%f" format */
+                       if (desc.integer_step) {
+                               replace_all (desc.print_fmt, "%f", "%d");
+                       } else if (desc.upper - desc.lower >= 1000) {
+                               replace_all (desc.print_fmt, "%f", "%.1f");
+                       } else if (desc.upper - desc.lower >= 100) {
+                               replace_all (desc.print_fmt, "%f", "%.2f");
+                       } else {
+                               replace_all (desc.print_fmt, "%f", "%.3f");
+                       }
                        lilv_node_free(render);
                }
        }