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// SPDX-License-Identifier: BSD-2-Clause
// Copyright The Music Player Daemon Project
/*! \file
* \brief MPD client library
*
* Functions for manipulating MPD's mixer controls.
*
* Do not include this header directly. Use mpd/client.h instead.
*/
#ifndef MPD_MIXER_H
#define MPD_MIXER_H
#include <stdbool.h>
struct mpd_connection;
#ifdef __cplusplus
extern "C" {
#endif
/**
* Sets the volume of all output devices.
*
* @param connection the connection to MPD
* @param volume the volume, an integer between 0 and 100
* @return true on success, false on error
*/
bool
mpd_send_set_volume(struct mpd_connection *connection, unsigned volume);
/**
* Shortcut for mpd_send_set_volume() and mpd_response_finish().
*
* @param connection the connection to MPD
* @param volume the volume, an integer between 0 and 100
* @return true on success, false on error
*/
bool
mpd_run_set_volume(struct mpd_connection *connection, unsigned volume);
/**
* Changes the volume of all output devices.
*
* @param connection the connection to MPD
* @param relative_volume the relative volume, an integer between -100 and 100
* @return true on success, false on error
*
* @since libmpdclient 2.9
*/
bool
mpd_send_change_volume(struct mpd_connection *connection, int relative_volume);
/**
* Shortcut for mpd_send_change_volume() and mpd_response_finish().
*
* @param connection the connection to MPD
* @param relative_volume the relative volume, an integer between -100 and 100
* @return true on success, false on error
*
* @since libmpdclient 2.9
*/
bool
mpd_run_change_volume(struct mpd_connection *connection, int relative_volume);
/**
* Sends the "getvol" command to MPD. Call mpd_recv_pair() to
* read the response line.
*
* @param connection a valid and connected #mpd_connection
* @return true on success
*
* @since libmpdclient 2.20, MPD 0.23
*/
bool
mpd_send_get_volume(struct mpd_connection *connection);
/**
* Shortcut for mpd_send_get_volume(), mpd_recv_pair_named() and
* mpd_response_finish().
*
* @param connection a valid and connected #mpd_connection
* @return volume on success or -1 on error
*
* @since libmpdclient 2.20, MPD 0.23
*/
int
mpd_run_get_volume(struct mpd_connection *connection);
#ifdef __cplusplus
}
#endif
#endif
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