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  * All files in this archive are subject to the GNU General Public License.
  14  * See the file COPYING in the source tree root for full license agreement.
  15  *
  16  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  17  * KIND, either express or implied.
  18  *
  19  ****************************************************************************/
  20 #ifndef SPDIF_H
  21 #define SPDIF_H
  22
  23 #ifdef HAVE_SPDIF_POWER
  24 #define IF_SPDIF_POWER_(...)    __VA_ARGS__
  25 #else
  26 #define IF_SPDIF_POWER_(...)
  27 #endif
  28
  29 /* Initialize the S/PDIF driver */
  30 void spdif_init(void);
  31 /* Return the S/PDIF frequency in herz - unrounded */
  32 unsigned long spdif_measure_frequency(void);
  33 #ifdef HAVE_SPDIF_OUT
  34 /* Set the S/PDIF audio feed - Use AUDIO_SRC_* values -
  35    will be off if not powered or !on */
  36 void spdif_set_output_source(int source IF_SPDIF_POWER_(, bool on));
  37 /* Return the last set S/PDIF audio source - literally the last value passed
  38    to spdif_set_monitor regardless of power state */
  39 int spdif_get_output_source(bool *src_on);
  40 #endif /* HAVE_SPDIF_OUT */
  41
  42 #endif /* SPDIF_H */