decoder_api: moved struct decoder_plugin to decoder_plugin.h

The decoder_plugin struct is used by both the MPD core and the decoder
plugin implementations.  Move it to a shared header file, to minimize
header dependencies.

1 files changed, 80 insertions, 0 deletions

diff --git a/src/decoder_plugin.h b/src/decoder_plugin.h
new file mode 100644
index 00000000..3c05dc5b
--- /dev/null
+++ b/src/decoder_plugin.h
@@ -0,0 +1,80 @@
+/*
+ * 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