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https://github.com/alsa-project/alsa-tools.git
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69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
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/*****************************************************************************
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level.c
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Copyright (C) 2003 by Robert Vetter <postmaster@robertvetter.com>
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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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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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*****************************************************************************/
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#include "rmedigicontrol.h"
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static snd_ctl_elem_value_t *val;
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static snd_ctl_elem_info_t *info;
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static char vlab[8];
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static char *val2char(gdouble val)
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{
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sprintf(vlab,"%2.0f",100-val);
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return(vlab);
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}
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static void changed(GtkAdjustment *a,gpointer p)
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{
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snd_ctl_elem_value_set_integer(val,0,((100-a->value)*snd_ctl_elem_info_get_max(info))/100);
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snd_ctl_elem_value_set_integer(val,1,((100-a->value)*snd_ctl_elem_info_get_max(info))/100);
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snd_ctl_elem_write(ctl,val);
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gtk_label_set_text(p,val2char(a->value));
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}
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GtkWidget *create_level_box()
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{
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GtkObject *adjust;
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GtkWidget *box,*slider1,*label1,*vlabel;
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char *elem_name="DAC Playback Volume";
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box=gtk_vbox_new(FALSE,2);
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snd_ctl_elem_info_malloc(&info);
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snd_ctl_elem_value_malloc(&val);
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snd_ctl_elem_info_set_interface(info,SND_CTL_ELEM_TYPE_INTEGER);
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snd_ctl_elem_info_set_name(info,elem_name);
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snd_ctl_elem_info_set_numid(info,0);
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snd_ctl_elem_info(ctl,info);
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snd_ctl_elem_value_set_interface(val,SND_CTL_ELEM_TYPE_INTEGER);
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snd_ctl_elem_value_set_name(val,elem_name);
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snd_ctl_elem_read(ctl,val);
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adjust=GTK_OBJECT(gtk_adjustment_new(100-(snd_ctl_elem_value_get_integer(val,0)*100)/snd_ctl_elem_info_get_max(info),0,100,1,5,0));
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vlabel=gtk_label_new(val2char((GTK_ADJUSTMENT(adjust))->value));
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gtk_signal_connect(adjust,"value_changed",GTK_SIGNAL_FUNC(changed),vlabel);
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slider1=gtk_vscale_new(GTK_ADJUSTMENT(adjust));
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gtk_scale_set_draw_value(GTK_SCALE(slider1),FALSE);
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gtk_scale_set_digits(GTK_SCALE(slider1),0);
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label1=gtk_label_new("Level");
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gtk_box_pack_start(GTK_BOX(box),label1,FALSE,TRUE,5);
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gtk_box_pack_start(GTK_BOX(box),slider1,TRUE,TRUE,5);
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gtk_box_pack_start(GTK_BOX(box),vlabel,FALSE,TRUE,5);
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return box;
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}
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