Add slv2_instance_get_extension_data.

git-svn-id: http://svn.drobilla.net/lad/trunk/slv2@1536 a436a847-0d15-0410-975c-d299462d15a1

2 files changed, 20 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index e870051..38eaa25 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,7 @@ slv2 (9999) unstable; urgency=low
 
   * NOT YET RELEASED
   * Add slv2_port_get_value (analogous to slv2_plugin_get_value).
+  * Add slv2_instance_get_extension_data.
  
  -- Dave Robillard <dave@drobilla.net>  Sun, 01 Jan 9999 00:00:00 -0400
 
diff --git a/slv2/plugininstance.h b/slv2/plugininstance.h
index e648513..7c05468 100644
--- a/slv2/plugininstance.h
+++ b/slv2/plugininstance.h
@@ -173,6 +173,25 @@ slv2_instance_deactivate(SLV2Instance instance)
 }
 
 
+/** Get extension data from the plugin instance.
+ *
+ * The type and semantics of the data returned is specific to the particular
+ * extension, though in all cases it is shared and must not be deleted.
+ */
+static inline const void*
+slv2_instance_get_extension_data(SLV2Instance instance,
+                                 const char*  uri)
+{
+	assert(instance);
+	assert(instance->lv2_descriptor);
+	
+	if (instance->lv2_descriptor->extension_data)
+		return instance->lv2_descriptor->extension_data(uri);
+	else
+		return NULL;
+}
+
+
 /** Get the LV2_Descriptor of the plugin instance.
  *
  * Normally hosts should not need to access the LV2_Descriptor directly,