Encoder*: move to src/encoder

.. and move the plugins to src/encoder/plugins/.

src/encoder/EncoderList.hxx

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_ENCODER_LIST_HXX
+#define MPD_ENCODER_LIST_HXX
+
+struct EncoderPlugin;
+
+extern const EncoderPlugin *const encoder_plugins[];
+
+#define encoder_plugins_for_each(plugin) \
+	for (const EncoderPlugin *plugin, \
+		*const*encoder_plugin_iterator = &encoder_plugins[0]; \
+		(plugin = *encoder_plugin_iterator) != nullptr; \
+		++encoder_plugin_iterator)
+
+/**
+ * Looks up an encoder plugin by its name.
+ *
+ * @param name the encoder name to look for
+ * @return the encoder plugin with the specified name, or nullptr if none
+ * was found
+ */
+const EncoderPlugin *
+encoder_plugin_get(const char *name);
+
+#endif