/*
* HDSPConf
*
* Copyright (C) 2003 Thomas Charbonnel (thomas@undata.org)
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#pragma implementation
#include "HC_InputLevel.h"
void input_level_cb(Fl_Widget *w, void *arg)
{
int err;
char card_name[6];
snd_ctl_elem_value_t *ctl;
snd_ctl_elem_id_t *id;
snd_ctl_t *handle;
int gain = 0;
Fl_Round_Button *source = (Fl_Round_Button *)w;
HC_InputLevel *il = (HC_InputLevel *)arg;
HC_CardPane *pane = (HC_CardPane *)il->parent();
if (source == il->lo_gain) {
gain = 2;
} else if (source == il->plus_four_dbu) {
gain = 1;
} else if (source == il->minus_ten_dbv) {
gain = 0;
}
snprintf(card_name, 6, "hw:%i", pane->alsa_index);
snd_ctl_elem_value_alloca(&ctl);
snd_ctl_elem_id_alloca(&id);
snd_ctl_elem_id_set_name(id, "AD Gain");
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER);
snd_ctl_elem_id_set_index(id, 0);
snd_ctl_elem_value_set_id(ctl, id);
snd_ctl_elem_value_set_enumerated(ctl, 0, gain);
if ((err = snd_ctl_open(&handle, card_name, SND_CTL_NONBLOCK)) < 0) {
fprintf(stderr, "Error opening ctl interface on card %s\n", card_name);
return;
}
if ((err = snd_ctl_elem_write(handle, ctl)) < 0) {
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_HWDEP);
snd_ctl_elem_value_set_id(ctl, id);
if ((err = snd_ctl_elem_write(handle, ctl)) < 0) {
fprintf(stderr, "Error accessing ctl interface on card %s\n", card_name);
snd_ctl_close(handle);
return;
}
}
snd_ctl_close(handle);
}
HC_InputLevel::HC_InputLevel(int x, int y, int w, int h):Fl_Group(x, y, w, h, "Input Level")
{
int i = 0;
int v_step = (int)(h/3.0f);
box(FL_ENGRAVED_FRAME);;
label("Input Level");
labelsize(10);
align(FL_ALIGN_TOP|FL_ALIGN_LEFT);
lo_gain = new Fl_Round_Button(x+15, y+v_step*i++, w-30, v_step, "Lo Gain");
plus_four_dbu = new Fl_Round_Button(x+15, y+v_step*i++, w-30, v_step, "+4 dBu");
minus_ten_dbv = new Fl_Round_Button(x+15, y+v_step*i++, w-30, v_step, "-10 dBV");
lo_gain->labelsize(10);
lo_gain->type(FL_RADIO_BUTTON);
lo_gain->callback(input_level_cb, (void *)this);
plus_four_dbu->labelsize(10);
plus_four_dbu->type(FL_RADIO_BUTTON);
plus_four_dbu->callback(input_level_cb, (void *)this);
minus_ten_dbv->labelsize(10);
minus_ten_dbv->type(FL_RADIO_BUTTON);
minus_ten_dbv->callback(input_level_cb, (void *)this);
end();
}
void HC_InputLevel::setInputLevel(unsigned char i)
{
switch (i) {
case 0:
if (minus_ten_dbv->value() != 1)
minus_ten_dbv->setonly();
break;
case 1:
if (plus_four_dbu->value() != 1)
plus_four_dbu->setonly();
break;
case 2:
if (lo_gain->value() != 1)
lo_gain->setonly();
break;
}
}