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