45 lines
1.6 KiB
C
45 lines
1.6 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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*
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* Copyright (c) 2021 Andrew Ryabinin, Dana Conrad
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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 _EROS_QN_CODEC_H
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#define _EROS_QN_CODEC_H
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/*
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* Note: Maximum volume is set one step below unity in order to
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* avoid overflowing pcm samples due to our DC Offset.
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*
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* The DAC's output is hot enough this should not be an issue.
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*/
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#define PCM5102A_VOLUME_MIN -740
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#define PCM5102A_VOLUME_MAX -20
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/* a small DC offset prevents play/pause clicking due to the DAC auto-muting */
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#define PCM_DC_OFFSET_VALUE -1
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AUDIOHW_SETTING(VOLUME, "dB", 0, 2, PCM5102A_VOLUME_MIN/10, PCM5102A_VOLUME_MAX/10, 0)
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/* this just calls audiohw_set_volume() with the last (locally) known volume,
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* used for switching to/from fixed line out volume. */
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void pcm5102_set_outputs(void);
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#endif
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