69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
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/***************************************************************************
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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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*
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* Copyright (C) 2014 by Ilia Sergachev: Initial Rockbox port to iBasso DX50
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* Copyright (C) 2014 by Mario Basister: iBasso DX90 port
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* Copyright (C) 2014 by Simon Rothen: Initial Rockbox repository submission, additional features
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* Copyright (C) 2014 by Udo Schläpfer: Code clean up, additional features
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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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#include "config.h"
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#include "debug.h"
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#include "debug-ibasso.h"
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#include "sysfs-ibasso.h"
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extern void set_software_volume(void);
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void audiohw_set_volume(int volume)
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{
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set_software_volume();
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/*
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See codec-dx50.h.
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-128db -> -1 (adjusted to 0, mute)
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-127dB to 0dB -> 1 to 255 in steps of 2
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volume is in centibels (tenth-decibels).
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*/
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int volume_adjusted = (volume / 10) * 2 + 255;
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DEBUGF("DEBUG %s: volume: %d, volume_adjusted: %d.", __func__, volume, volume_adjusted);
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if(volume_adjusted > 255)
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{
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DEBUGF("DEBUG %s: Adjusting volume from %d to 255.", __func__, volume);
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volume_adjusted = 255;
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}
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if(volume_adjusted < 0)
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{
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DEBUGF("DEBUG %s: Adjusting volume from %d to 0.", __func__, volume);
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volume_adjusted = 0;
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}
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/*
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/dev/codec_volume
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0 ... 255
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*/
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if(! sysfs_set_int(SYSFS_DX50_CODEC_VOLUME, volume_adjusted))
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{
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DEBUGF("ERROR %s: Can not set volume.", __func__);
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}
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}
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