62 lines
1.4 KiB
C++
62 lines
1.4 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#ifndef MPD_OUTPUT_PLUGIN_HXX
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#define MPD_OUTPUT_PLUGIN_HXX
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struct ConfigBlock;
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class AudioOutput;
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struct MixerPlugin;
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class EventLoop;
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/**
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* A plugin which controls an audio output device.
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*/
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struct AudioOutputPlugin {
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/**
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* the plugin's name
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*/
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const char *name;
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/**
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* Test if this plugin can provide a default output, in case
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* none has been configured. This method is optional.
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*/
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bool (*test_default_device)();
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/**
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* Configure and initialize the device, but do not open it
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* yet.
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*
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* Throws on error.
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*
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* @param param the configuration section, or nullptr if there is
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* no configuration
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*/
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AudioOutput *(*init)(EventLoop &event_loop, const ConfigBlock &block);
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/**
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* The mixer plugin associated with this output plugin. This
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* may be nullptr if no mixer plugin is implemented. When
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* created, this mixer plugin gets the same #ConfigParam as
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* this audio output device.
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*/
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const MixerPlugin *mixer_plugin;
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};
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static inline bool
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ao_plugin_test_default_device(const AudioOutputPlugin *plugin)
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{
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return plugin->test_default_device != nullptr
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? plugin->test_default_device()
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: false;
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}
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[[gnu::malloc]] [[gnu::returns_nonnull]]
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AudioOutput *
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ao_plugin_init(EventLoop &event_loop,
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const AudioOutputPlugin &plugin,
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const ConfigBlock &block);
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#endif
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