uspace/lib/drv/include/audio_mixer_iface.h

   1 /*
   2  * Copyright (c) 2011 Jan Vesely
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /** @addtogroup libdrv
  30  * @addtogroup usb
  31  * @{
  32  */
  33 /** @file
  34  * @brief Audio mixer control interface.
  35  */
  36
  37 #ifndef LIBDRV_AUDIO_MIXER_IFACE_H_
  38 #define LIBDRV_AUDIO_MIXER_IFACE_H_
  39
  40 #include <async.h>
  41 #include <stdbool.h>
  42
  43 #include "ddf/driver.h"
  44
  45 errno_t audio_mixer_get_info(async_exch_t *, char **, unsigned *);
  46 errno_t audio_mixer_get_item_info(async_exch_t *, unsigned,
  47     char **, unsigned *);
  48 errno_t audio_mixer_get_item_level(async_exch_t *, unsigned, unsigned *);
  49 errno_t audio_mixer_set_item_level(async_exch_t *, unsigned, unsigned);
  50
  51 /** Audio mixer communication interface. */
  52 typedef struct {
  53         errno_t (*get_info)(ddf_fun_t *, const char **, unsigned *);
  54         errno_t (*get_item_info)(ddf_fun_t *, unsigned, const char **, unsigned *);
  55         errno_t (*get_item_level)(ddf_fun_t *, unsigned, unsigned *);
  56         errno_t (*set_item_level)(ddf_fun_t *, unsigned, unsigned);
  57 } audio_mixer_iface_t;
  58
  59 #endif
  60 /**
  61  * @}
  62  */