firmware/export/spdif.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006 by Michal Sevakis
  11  * Based on the work of Thom Johansen
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  19  * KIND, either express or implied.
  20  *
  21  ****************************************************************************/
  22 #ifndef SPDIF_H
  23 #define SPDIF_H
  24
  25 #ifdef HAVE_SPDIF_POWER
  26 #define IF_SPDIF_POWER_(...)    __VA_ARGS__
  27 #else
  28 #define IF_SPDIF_POWER_(...)
  29 #endif
  30
  31 /* Initialize the S/PDIF driver */
  32 void spdif_init(void);
  33 /* Return the S/PDIF frequency in herz - unrounded */
  34 unsigned long spdif_measure_frequency(void);
  35 #ifdef HAVE_SPDIF_OUT
  36 /* Set the S/PDIF audio feed - Use AUDIO_SRC_* values -
  37    will be off if not powered or !on */
  38 void spdif_set_output_source(int source IF_SPDIF_POWER_(, bool on));
  39 /* Return the last set S/PDIF audio source - literally the last value passed
  40    to spdif_set_monitor regardless of power state */
  41 int spdif_get_output_source(bool *src_on);
  42 #endif /* HAVE_SPDIF_OUT */
  43
  44 #endif /* SPDIF_H */