mirror of
https://github.com/alsa-project/alsa-tools.git
synced 2025-10-29 05:40:25 -04:00
75 lines
2.6 KiB
C
75 lines
2.6 KiB
C
/*****************************************************************************
|
|
level.c
|
|
Copyright (C) 2003 by Robert Vetter <postmaster@robertvetter.com>
|
|
|
|
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 program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
*****************************************************************************/
|
|
|
|
#include "rmedigicontrol.h"
|
|
|
|
static snd_ctl_elem_value_t *val;
|
|
static snd_ctl_elem_info_t *info;
|
|
static char vlab[8];
|
|
|
|
static char *val2char(gdouble val)
|
|
{
|
|
sprintf(vlab,"%2.0f",100-val);
|
|
return(vlab);
|
|
}
|
|
static void changed(GtkAdjustment *a, gpointer p)
|
|
{
|
|
double value = gtk_adjustment_get_value(a);
|
|
int adjusted_value = ((100 - value) * snd_ctl_elem_info_get_max(info)) / 100;
|
|
snd_ctl_elem_value_set_integer(val, 0, adjusted_value);
|
|
snd_ctl_elem_value_set_integer(val, 1, adjusted_value);
|
|
snd_ctl_elem_write(ctl, val);
|
|
gtk_label_set_text(GTK_LABEL(p), val2char(value));
|
|
}
|
|
|
|
GtkWidget *create_level_box()
|
|
{
|
|
GtkAdjustment *adjust;
|
|
GtkWidget *box,*slider1,*label1,*vlabel;
|
|
char *elem_name="DAC Playback Volume";
|
|
box=gtk_box_new(GTK_ORIENTATION_VERTICAL, 2);
|
|
|
|
snd_ctl_elem_info_malloc(&info);
|
|
snd_ctl_elem_value_malloc(&val);
|
|
|
|
snd_ctl_elem_info_set_interface(info,SND_CTL_ELEM_TYPE_INTEGER);
|
|
snd_ctl_elem_info_set_name(info,elem_name);
|
|
snd_ctl_elem_info_set_numid(info,0);
|
|
snd_ctl_elem_info(ctl,info);
|
|
|
|
snd_ctl_elem_value_set_interface(val,SND_CTL_ELEM_TYPE_INTEGER);
|
|
snd_ctl_elem_value_set_name(val,elem_name);
|
|
snd_ctl_elem_read(ctl,val);
|
|
|
|
adjust = gtk_adjustment_new(
|
|
100 - (snd_ctl_elem_value_get_integer(val, 0) * 100) / snd_ctl_elem_info_get_max(info),
|
|
0, // lower
|
|
100, // upper
|
|
1, // step increment
|
|
5, // page increment
|
|
0 // page size
|
|
);
|
|
vlabel = gtk_label_new(val2char(gtk_adjustment_get_value(adjust)));
|
|
g_signal_connect(adjust,"value_changed",G_CALLBACK(changed),vlabel);
|
|
slider1=gtk_scale_new(GTK_ORIENTATION_VERTICAL, adjust);
|
|
gtk_scale_set_draw_value(GTK_SCALE(slider1),FALSE);
|
|
gtk_scale_set_digits(GTK_SCALE(slider1),0);
|
|
|
|
label1=gtk_label_new("Level");
|
|
gtk_box_pack_start(GTK_BOX(box),label1,FALSE,TRUE,5);
|
|
gtk_box_pack_start(GTK_BOX(box),slider1,TRUE,TRUE,5);
|
|
gtk_box_pack_start(GTK_BOX(box),vlabel,FALSE,TRUE,5);
|
|
return box;
|
|
}
|