comparison org/vamp_plugins/PluginLoader.java @ 23:cc9c503535d1

add listPlugins, some docs

 
 package org.vamp_plugins;
 
+/**
+ * PluginLoader loads a Vamp plugin by searching the standard Vamp
+ * installation path, and returns a Plugin object wrapping the native
+ * plugin.
+ *
+ * To load a plugin call PluginLoader.getInstance().loadPlugin(key,
+ * rate), where rate is the processing sample rate and key is the
+ * plugin key consisting of the plugin's library base name and its
+ * identifier, colon-separated. For example,
+ *
+ * Plugin p = PluginLoader.getInstance().loadPlugin("vamp-example-plugins:percussiononsets", 44100);
+ */
 public class PluginLoader
 {
     public class LoadFailedException extends Exception { };
 
+    /**
+     * PluginLoader is a singleton. Return the instance of it.
+     */
     public static synchronized PluginLoader getInstance() {
 	if (inst == null) {
 	    inst = new PluginLoader();
 	    inst.initialise();
 	}
 	return inst;
     }
 
+    /**
+     * Search for all available Vamp plugins, and return a list of
+     * their plugin keys (suitable for passing to loadPlugin) in the
+     * order in which they were found.
+     */
+    public native ArrayList<String> listPlugins();
+
+    /**
+     * Load a native Vamp plugin from the plugin path. If the plugin
+     * cannot be loaded, throw LoadFailedException.
+     * 
+     * key is the plugin key consisting of the plugin's library base
+     * name and its identifier, colon-separated; inputSampleRate is
+     * the processing sample rate for input audio.
+     *
+     *!!! todo: adapter flags
+     */
     public Plugin loadPlugin(String key, float inputSampleRate)
 	throws LoadFailedException {
 	long handle = loadPluginNative(key, inputSampleRate);
 	if (handle != 0) return new Plugin(handle);
 	else throw new LoadFailedException();
     }
+
+    /**
+     * Return the category hierarchy for a Vamp plugin, given its
+     * identifying key. The hierarchy is a sequence of category names
+     * giving the location of a plugin within a category forest,
+     * containing the human-readable names of the plugin's category
+     * tree root, followed by each of the nodes down to the leaf
+     * containing the plugin.
+     *
+     * If the plugin has no category information, return an empty
+     * list.
+     */
+    public native ArrayList<String> getPluginCategory(String key);
 
     private PluginLoader() { initialise(); }
     private native long loadPluginNative(String key, float inputSampleRate);
     private native void initialise();
     private static PluginLoader inst;