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/*
* Copyright 2003-2020 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_OUTPUT_PLUGIN_HXX
#define MPD_OUTPUT_PLUGIN_HXX
#include "util/Compiler.h"
struct ConfigBlock;
class AudioOutput;
struct MixerPlugin;
class EventLoop;
/**
* A plugin which controls an audio output device.
*/
struct AudioOutputPlugin {
/**
* the plugin's name
*/
const char *name;
/**
* Test if this plugin can provide a default output, in case
* none has been configured. This method is optional.
*/
bool (*test_default_device)();
/**
* Configure and initialize the device, but do not open it
* yet.
*
* Throws on error.
*
* @param param the configuration section, or nullptr if there is
* no configuration
*/
AudioOutput *(*init)(EventLoop &event_loop, const ConfigBlock &block);
/**
* The mixer plugin associated with this output plugin. This
* may be nullptr if no mixer plugin is implemented. When
* created, this mixer plugin gets the same #ConfigParam as
* this audio output device.
*/
const MixerPlugin *mixer_plugin;
};
static inline bool
ao_plugin_test_default_device(const AudioOutputPlugin *plugin)
{
return plugin->test_default_device != nullptr
? plugin->test_default_device()
: false;
}
gcc_malloc gcc_returns_nonnull
AudioOutput *
ao_plugin_init(EventLoop &event_loop,
const AudioOutputPlugin &plugin,
const ConfigBlock &block);
#endif
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