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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
*
* Copyright (c) 2021 Andrew Ryabinin, Dana Conrad
*
* 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 _EROS_QN_CODEC_H
#define _EROS_QN_CODEC_H
/*
* Note: Maximum volume is set one step below unity in order to
* avoid overflowing pcm samples due to our DC Offset.
*
* The DAC's output is hot enough this should not be an issue.
*/
#define PCM5102A_VOLUME_MIN -740
#define PCM5102A_VOLUME_MAX -20
/* a small DC offset prevents play/pause clicking due to the PCM5102A DAC auto-muting */
#define PCM_DC_OFFSET_VALUE -1
AUDIOHW_SETTING(VOLUME, "dB", 0, 2, PCM5102A_VOLUME_MIN/10, PCM5102A_VOLUME_MAX/10, 0)
/* flag indicating whether this is a new revision unit with the ES9018K2M DAC */
extern int es9018k2m_present_flag;
/* Switch the output sink. 0 - headphones, 1 - line out */
void eros_qn_switch_output(int select);
/* Record last volume setting for switching between headphones/line out */
void eros_qn_set_last_vol(long int vol_l, long int vol_r);
/* this just calls audiohw_set_volume() with the last (locally) known volume,
* used for switching to/from fixed line out volume. */
void eros_qn_set_outputs(void);
/* returns (global_settings.volume_limit * 10) */
int eros_qn_get_volume_limit(void);
/* powers on the dac and tries to speak over i2c.
* will return 1 if es9018k2m, 0 if non-i2c dac.
* if pwr_after_discovery = 1, leave dac powered up.
* if 0, power down dac. */
bool eros_qn_discover_dac(bool pwr_after_discovery);
#endif
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