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LV2 - query presets without instantiating the plugin

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This commit is contained in:
Robin Gareus 2016-01-07 17:10:35 +01:00
parent d5dbdc9ea5
commit deb6884a53
2 changed files with 42 additions and 0 deletions
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1
libs/ardour/ardour/lv2_plugin.h
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@ -281,6 +281,7 @@ public:
static PluginInfoList* discover ();
PluginPtr load (Session& session);
virtual std::vector<Plugin::PresetRecord> get_presets(Session& session);
virtual bool in_category (const std::string &c) const;
virtual bool is_instrument() const;

41
libs/ardour/lv2_plugin.cc
View File

@ -2622,6 +2622,47 @@ LV2PluginInfo::load(Session& session)
return PluginPtr();
}
std::vector<Plugin::PresetRecord>
LV2PluginInfo::get_presets(Session&)
{
std::vector<Plugin::PresetRecord> p;
#ifndef NO_PLUGIN_STATE
const LilvPlugin* lp = NULL;
try {
PluginPtr plugin;
const LilvPlugins* plugins = lilv_world_get_all_plugins(_world.world);
LilvNode* uri = lilv_new_uri(_world.world, _plugin_uri);
if (!uri) { throw failed_constructor(); }
lp = lilv_plugins_get_by_uri(plugins, uri);
if (!lp) { throw failed_constructor(); }
lilv_node_free(uri);
} catch (failed_constructor& err) {
return p;
}
assert (lp);
// see LV2Plugin::find_presets
LilvNode* lv2_appliesTo = lilv_new_uri(_world.world, LV2_CORE__appliesTo);
LilvNode* pset_Preset = lilv_new_uri(_world.world, LV2_PRESETS__Preset);
LilvNode* rdfs_label = lilv_new_uri(_world.world, LILV_NS_RDFS "label");
LilvNodes* presets = lilv_plugin_get_related(lp, pset_Preset);
LILV_FOREACH(nodes, i, presets) {
const LilvNode* preset = lilv_nodes_get(presets, i);
lilv_world_load_resource(_world.world, preset);
LilvNode* name = get_value(_world.world, preset, rdfs_label);
if (name) {
p.push_back (Plugin::PresetRecord(lilv_node_as_string(preset), lilv_node_as_string(name)));
lilv_node_free(name);
}
}
lilv_nodes_free(presets);
lilv_node_free(rdfs_label);
lilv_node_free(pset_Preset);
lilv_node_free(lv2_appliesTo);
#endif
return p;
}
bool
LV2PluginInfo::in_category (const std::string &c) const
{