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-rw-r--r--src/playlist_plugin.h137
1 files changed, 137 insertions, 0 deletions
diff --git a/src/playlist_plugin.h b/src/playlist_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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_PLAYLIST_PLUGIN_H
+#define MPD_PLAYLIST_PLUGIN_H
+
+#include <stdbool.h>
+#include <stddef.h>
+
+struct config_param;
+struct input_stream;
+struct tag;
+
+/**
+ * An object which provides the contents of a playlist.
+ */
+struct playlist_provider {
+ const struct playlist_plugin *plugin;
+};
+
+static inline void
+playlist_provider_init(struct playlist_provider *playlist,
+ const struct playlist_plugin *plugin)
+{
+ playlist->plugin = plugin;
+}
+
+struct playlist_plugin {
+ const char *name;
+
+ /**
+ * Initialize the plugin. Optional method.
+ *
+ * @param param a configuration block for this plugin, or NULL
+ * if none is configured
+ * @return true if the plugin was initialized successfully,
+ * false if the plugin is not available
+ */
+ bool (*init)(const struct config_param *param);
+
+ /**
+ * Deinitialize a plugin which was initialized successfully.
+ * Optional method.
+ */
+ void (*finish)(void);
+
+ /**
+ * Opens the playlist on the specified URI. This URI has
+ * either matched one of the schemes or one of the suffixes.
+ */
+ struct playlist_provider *(*open_uri)(const char *uri);
+
+ /**
+ * Opens the playlist in the specified input stream. It has
+ * either matched one of the suffixes or one of the MIME
+ * types.
+ */
+ struct playlist_provider *(*open_stream)(struct input_stream *is);
+
+ void (*close)(struct playlist_provider *playlist);
+
+ struct song *(*read)(struct playlist_provider *playlist);
+
+ const char *const*schemes;
+ const char *const*suffixes;
+ const char *const*mime_types;
+};
+
+/**
+ * Initialize a plugin.
+ *
+ * @param param a configuration block for this plugin, or NULL if none
+ * is configured
+ * @return true if the plugin was initialized successfully, false if
+ * the plugin is not available
+ */
+static inline bool
+playlist_plugin_init(const struct playlist_plugin *plugin,
+ const struct config_param *param)
+{
+ return plugin->init != NULL
+ ? plugin->init(param)
+ : true;
+}
+
+/**
+ * Deinitialize a plugin which was initialized successfully.
+ */
+static inline void
+playlist_plugin_finish(const struct playlist_plugin *plugin)
+{
+ if (plugin->finish != NULL)
+ plugin->finish();
+}
+
+static inline struct playlist_provider *
+playlist_plugin_open_uri(const struct playlist_plugin *plugin, const char *uri)
+{
+ return plugin->open_uri(uri);
+}
+
+static inline struct playlist_provider *
+playlist_plugin_open_stream(const struct playlist_plugin *plugin,
+ struct input_stream *is)
+{
+ return plugin->open_stream(is);
+}
+
+static inline void
+playlist_plugin_close(struct playlist_provider *playlist)
+{
+ playlist->plugin->close(playlist);
+}
+
+static inline struct song *
+playlist_plugin_read(struct playlist_provider *playlist)
+{
+ return playlist->plugin->read(playlist);
+}
+
+#endif