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/*
* Copyright (C) 2003-2013 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_HXX
#define MPD_PLAYLIST_PLUGIN_HXX
#include "thread/Mutex.hxx"
#include "thread/Cond.hxx"
#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,
Mutex &mutex, Cond &cond);
/**
* 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,
Mutex &mutex, Cond &cond)
{
return plugin->open_uri(uri, mutex, cond);
}
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
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