/*
* Copyright (c) 2011 Jan Vesely
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup libdrv
* @addtogroup usb
* @{
*/
/** @file
* @brief Audio mixer control interface.
*/
#ifndef LIBDRV_AUDIO_MIXER_IFACE_H_
#define LIBDRV_AUDIO_MIXER_IFACE_H_
#include <async.h>
#include <stdbool.h>
#include "ddf/driver.h"
errno_t audio_mixer_get_info(async_exch_t *, char **, unsigned *);
errno_t audio_mixer_get_item_info(async_exch_t *, unsigned,
char **, unsigned *);
errno_t audio_mixer_get_item_level(async_exch_t *, unsigned, unsigned *);
errno_t audio_mixer_set_item_level(async_exch_t *, unsigned, unsigned);
/** Audio mixer communication interface. */
typedef struct {
errno_t (*get_info)(ddf_fun_t *, const char **, unsigned *);
errno_t (*get_item_info)(ddf_fun_t *, unsigned, const char **, unsigned *);
errno_t (*get_item_level)(ddf_fun_t *, unsigned, unsigned *);
errno_t (*set_item_level)(ddf_fun_t *, unsigned, unsigned);
} audio_mixer_iface_t;
#endif
/**
* @}
*/