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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2013 by Michael Sevakis
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef PCM_SW_VOLUME_H
#define PCM_SW_VOLUME_H
/***
** Note: Only PCM drivers that are themselves buffered should use the
** PCM_SW_VOLUME_UNBUFFERED configuration. This may be part of the platform,
** the library or a hardware necessity. Normally, it shouldn't be used and
** only the port developer can properly decide.
**/
#ifdef HAVE_SW_VOLUME_CONTROL
#include <audiohw.h>
#include <limits.h>
#define PCM_MUTE_LEVEL INT_MIN
#ifdef AUDIOHW_HAVE_PRESCALER
/* Set the prescaler value for all PCM playback */
void pcm_set_prescaler(int prescale);
#endif /* AUDIOHW_HAVE_PRESCALER */
/* Set the per-channel volume cut/gain for all PCM playback */
void pcm_set_master_volume(int vol_l, int vol_r);
#endif /* HAVE_SW_VOLUME_CONTROL */
#endif /* PCM_SW_VOLUME_H */
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