vst - fix effGetParameterProperties; label may be unset.

diff --git a/libs/ardour/vst_plugin.cc b/libs/ardour/vst_plugin.cc
index 52e139db84fab0bcc7ab722006271cac9b4e2931..a18cc07356106c1f4045dde35699005811ad4b47 100644 (file)
--- a/libs/ardour/vst_plugin.cc
+++ b/libs/ardour/vst_plugin.cc
@@ -250,6 +250,7 @@ VSTPlugin::get_parameter_descriptor (uint32_t which, ParameterDescriptor& desc)
 {
        VstParameterProperties prop;
 
+       memset (&prop, 0, sizeof (VstParameterProperties));
        desc.min_unbound = false;
        desc.max_unbound = false;
        prop.flags = 0;
@@ -257,6 +258,7 @@ VSTPlugin::get_parameter_descriptor (uint32_t which, ParameterDescriptor& desc)
        if (_plugin->dispatcher (_plugin, effGetParameterProperties, which, 0, &prop, 0)) {
 
                /* i have yet to find or hear of a VST plugin that uses this */
+               /* RG: faust2vsti does use this :) */
 
                if (prop.flags & kVstParameterUsesIntegerMinMax) {
                        desc.lower = prop.minInteger;
@@ -287,6 +289,10 @@ VSTPlugin::get_parameter_descriptor (uint32_t which, ParameterDescriptor& desc)
                        desc.largestep = desc.step * 10.0f;
                }
 
+               if (strlen(prop.label) == 0) {
+                       _plugin->dispatcher (_plugin, effGetParamName, which, 0, prop.label, 0);
+               }
+
                desc.toggled = prop.flags & kVstParameterIsSwitch;
                desc.logarithmic = false;
                desc.sr_dependent = false;