2nd half of patch for handling LV2 presets from colinf (#4698)

[ardour.git] / libs / ardour / lv2_plugin.cc

diff --git a/libs/ardour/lv2_plugin.cc b/libs/ardour/lv2_plugin.cc
index 6c8fb3c9db3d028c3a570262dd38fa8992254368..f8a41c5ecd576722e9f22200f3f593402570d2e1 100644 (file)
--- a/libs/ardour/lv2_plugin.cc
+++ b/libs/ardour/lv2_plugin.cc
@@ -835,7 +835,6 @@ LV2Plugin::find_presets()
 bool
 LV2Plugin::load_preset(PresetRecord r)
 {
-       Plugin::load_preset(r);
 
        std::map<std::string,uint32_t>::iterator it;
 
@@ -862,18 +861,97 @@ LV2Plugin::load_preset(PresetRecord r)
        lilv_node_free(lv2_symbol);
        lilv_node_free(lv2_port);
 
+       Plugin::load_preset(r);
+
        return true;
 }
 
+const void*
+ARDOUR::lv2plugin_get_port_value(const char* port_symbol,
+                                 void*       user_data,
+                                 uint32_t*   size,
+                                 uint32_t*   type)
+{
+       // cerr << "get_port_value(" << port_symbol << ", ...) ... ";
+       LV2Plugin *plugin = (LV2Plugin *) user_data;
+
+       uint32_t index = plugin->port_index(port_symbol);
+       if (index != (uint32_t) -1) {
+               if (plugin->parameter_is_input(index) && plugin->parameter_is_control(index)) {
+                       float *value;
+                       *size = sizeof(float);
+                       *type = plugin->_uri_map.uri_to_id(LV2_ATOM__Float);
+                       value = &plugin->_shadow_data[index];
+                       // cerr << "index="<< index << ",*size=" << *size << ",*type=" << *type << ",*value=" << *value << endl;
+
+                       return value;
+               }
+               // cerr << "port is not input control port! ";
+       }
+
+       // cerr << "returning NULL!" << endl;
+       *size = *type = 0;
+       return NULL;
+}
+
+
 std::string
-LV2Plugin::do_save_preset(string /*name*/)
+LV2Plugin::do_save_preset(string name)
 {
-       return "";
+       // cerr << "LV2Plugin::do_save_preset(" << name << ")" << endl;
+
+       string pset_uri = uri();
+       pset_uri += "#";
+       pset_uri += name;
+
+       string save_dir = Glib::build_filename(
+               Glib::get_home_dir(), 
+               Glib::build_filename(".lv2", "presets") 
+       );
+
+       LilvState* state = lilv_state_new_from_instance(
+               _impl->plugin,
+               _impl->instance,
+               _uri_map.urid_map(),
+               scratch_dir().c_str(),                  // file_dir
+               NULL,                                   // copy_dir
+               NULL,                                   // link_dir
+               save_dir.c_str(),                       // save_dir
+               lv2plugin_get_port_value,               // get_value
+               (void*) this,                           // user_data
+               LV2_STATE_IS_POD|LV2_STATE_IS_PORTABLE, // flags
+               _features                               // features
+       );
+
+       lilv_state_set_label(state, name.c_str());
+       lilv_state_save(
+               _world.world,           // world
+               _uri_map.urid_map(),    // map
+               _uri_map.urid_unmap(),  // unmap
+               state,                  // state
+               pset_uri.c_str(),       // uri
+               save_dir.c_str(),       // dir
+               (name + ".ttl").c_str() // filename
+
+       );
+
+       lilv_state_free(state);
+       return pset_uri;
 }
 
 void
-LV2Plugin::do_remove_preset(string /*name*/)
-{}
+LV2Plugin::do_remove_preset(string name)
+{
+       string preset_file = Glib::build_filename(
+               Glib::get_home_dir(), 
+               Glib::build_filename(
+                       Glib::build_filename(".lv2", "presets"),
+                       name + ".ttl"
+               )
+       );
+       unlink(preset_file.c_str());
+
+}
 
 bool
 LV2Plugin::has_editor() const