106 lines
2.4 KiB
C
106 lines
2.4 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) 2018 Marcin Bukat
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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 "audio.h"
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#include "audiohw.h"
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#include "system.h"
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#include "panic.h"
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#include "alsa-controls.h"
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static int fd_hw = -1;
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static long int vol_l_hw = 255;
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static long int vol_r_hw = 255;
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static int muted = -1;
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static void hw_open(void)
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{
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fd_hw = open("/dev/snd/controlC0", O_RDWR);
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if(fd_hw < 0)
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panicf("Cannot open '/dev/snd/controlC0'");
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}
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static void hw_close(void)
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{
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close(fd_hw);
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fd_hw = -1;
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muted = -1;
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}
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void audiohw_mute(int mute)
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{
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if (fd_hw < 0 || muted == mute)
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return;
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muted = mute;
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if(mute)
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{
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long int ps0 = 0;
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alsa_controls_set_ints("Output Port Switch", 1, &ps0);
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}
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else
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{
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long int ps2 = 2;
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alsa_controls_set_ints("Output Port Switch", 1, &ps2);
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}
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}
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void audiohw_preinit(void)
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{
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alsa_controls_init("default");
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hw_open();
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#if defined(AUDIOHW_MUTE_ON_STOP) || defined(AUDIOHW_NEEDS_INITIAL_UNMUTE)
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audiohw_mute(true); /* Start muted to avoid the POP */
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#else
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audiohw_mute(false);
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#endif
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}
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void audiohw_postinit(void)
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{
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}
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void audiohw_close(void)
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{
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hw_close();
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alsa_controls_close();
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}
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void audiohw_set_frequency(int fsel)
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{
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(void)fsel;
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}
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void audiohw_set_volume(int vol_l, int vol_r)
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{
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vol_l_hw = -vol_l/5;
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vol_r_hw = -vol_r/5;
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if (fd_hw < 0)
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return;
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alsa_controls_set_ints("Left Playback Volume", 1, &vol_l_hw);
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alsa_controls_set_ints("Right Playback Volume", 1, &vol_r_hw);
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}
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