/* * Copyright (C) 2003-2010 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