138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
/*
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* Copyright (C) 2003-2010 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_PLAYLIST_PLUGIN_H
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#define MPD_PLAYLIST_PLUGIN_H
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#include <stdbool.h>
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#include <stddef.h>
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struct config_param;
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struct input_stream;
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struct tag;
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/**
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* An object which provides the contents of a playlist.
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*/
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struct playlist_provider {
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const struct playlist_plugin *plugin;
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};
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static inline void
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playlist_provider_init(struct playlist_provider *playlist,
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const struct playlist_plugin *plugin)
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{
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playlist->plugin = plugin;
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}
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struct playlist_plugin {
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const char *name;
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/**
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* Initialize the plugin. Optional method.
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*
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* @param param a configuration block for this plugin, or NULL
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* if none is configured
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* @return true if the plugin was initialized successfully,
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* false if the plugin is not available
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*/
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bool (*init)(const struct config_param *param);
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/**
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* Deinitialize a plugin which was initialized successfully.
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* Optional method.
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*/
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void (*finish)(void);
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/**
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* Opens the playlist on the specified URI. This URI has
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* either matched one of the schemes or one of the suffixes.
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*/
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struct playlist_provider *(*open_uri)(const char *uri);
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/**
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* Opens the playlist in the specified input stream. It has
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* either matched one of the suffixes or one of the MIME
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* types.
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*/
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struct playlist_provider *(*open_stream)(struct input_stream *is);
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void (*close)(struct playlist_provider *playlist);
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struct song *(*read)(struct playlist_provider *playlist);
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const char *const*schemes;
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const char *const*suffixes;
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const char *const*mime_types;
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};
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/**
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* Initialize a plugin.
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*
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* @param param a configuration block for this plugin, or NULL if none
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* is configured
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* @return true if the plugin was initialized successfully, false if
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* the plugin is not available
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*/
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static inline bool
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playlist_plugin_init(const struct playlist_plugin *plugin,
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const struct config_param *param)
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{
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return plugin->init != NULL
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? plugin->init(param)
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: true;
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}
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/**
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* Deinitialize a plugin which was initialized successfully.
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*/
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static inline void
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playlist_plugin_finish(const struct playlist_plugin *plugin)
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{
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if (plugin->finish != NULL)
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plugin->finish();
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}
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static inline struct playlist_provider *
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playlist_plugin_open_uri(const struct playlist_plugin *plugin, const char *uri)
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{
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return plugin->open_uri(uri);
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}
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static inline struct playlist_provider *
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playlist_plugin_open_stream(const struct playlist_plugin *plugin,
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struct input_stream *is)
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{
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return plugin->open_stream(is);
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}
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static inline void
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playlist_plugin_close(struct playlist_provider *playlist)
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{
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playlist->plugin->close(playlist);
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}
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static inline struct song *
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playlist_plugin_read(struct playlist_provider *playlist)
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{
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return playlist->plugin->read(playlist);
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}
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#endif
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