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diff --git a/src/decoder_plugin.h b/src/decoder_plugin.h
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+/*
+ * Copyright (C) 2003-2009 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef MPD_DECODER_PLUGIN_H
+#define MPD_DECODER_PLUGIN_H
+
+#include <stdbool.h>
+
+struct input_stream;
+struct tag;
+
+/**
+ * Opaque handle which the decoder plugin passes to the functions in
+ * this header.
+ */
+struct decoder;
+
+struct decoder_plugin {
+ const char *name;
+
+ /**
+ * optional, set this to NULL if the InputPlugin doesn't
+ * have/need one this must return < 0 if there is an error and
+ * >= 0 otherwise
+ */
+ bool (*init)(void);
+
+ /**
+ * optional, set this to NULL if the InputPlugin doesn't have/need one
+ */
+ void (*finish)(void);
+
+ /**
+ * this will be used to decode InputStreams, and is
+ * recommended for files and networked (HTTP) connections.
+ *
+ * @return false if the plugin cannot decode the stream, and
+ * true if it was able to do so (even if an error occured
+ * during playback)
+ */
+ void (*stream_decode)(struct decoder *, struct input_stream *);
+
+ /**
+ * use this if and only if your InputPlugin can only be passed
+ * a filename or handle as input, and will not allow callbacks
+ * to be set (like Ogg-Vorbis and FLAC libraries allow)
+ *
+ * @return false if the plugin cannot decode the file, and
+ * true if it was able to do so (even if an error occured
+ * during playback)
+ */
+ void (*file_decode)(struct decoder *, const char *path);
+
+ /**
+ * file should be the full path! Returns NULL if a tag cannot
+ * be found or read
+ */
+ struct tag *(*tag_dup)(const char *file);
+
+ /* last element in these arrays must always be a NULL: */
+ const char *const*suffixes;
+ const char *const*mime_types;
+};
+
+#endif