/*

 *   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_OutputLevel.h"

void output_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_OutputLevel *ol = (HC_OutputLevel *)arg;

    HC_CardPane *pane = (HC_CardPane *)ol->parent();

    if (source == ol->hi_gain) {

	gain = 0;

    } else if (source == ol->plus_four_dbu) {

	gain = 1;

    } else if (source == ol->minus_ten_dbv) {

	gain = 2;

    }

    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, "DA 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_OutputLevel::HC_OutputLevel(int x, int y, int w, int h):Fl_Group(x, y, w, h, "Output Level")

{

	int i = 0;

	int v_step = (int)(h/3.0f);

	box(FL_ENGRAVED_FRAME);;

	label("Output Level");

	labelsize(10);

	align(FL_ALIGN_TOP|FL_ALIGN_LEFT);

	hi_gain = new Fl_Round_Button(x+15, y+v_step*i++, w-30, v_step, "Hi 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");

	hi_gain->labelsize(10);

	hi_gain->type(FL_RADIO_BUTTON);

	hi_gain->callback(output_level_cb, (void *)this);

	plus_four_dbu->labelsize(10);

	plus_four_dbu->type(FL_RADIO_BUTTON);

	plus_four_dbu->callback(output_level_cb, (void *)this);

	minus_ten_dbv->labelsize(10);

	minus_ten_dbv->type(FL_RADIO_BUTTON);

	minus_ten_dbv->callback(output_level_cb, (void *)this);

	end();	

}

void HC_OutputLevel::setOutputLevel(unsigned char i)

{

	if (i < children()) {

	    if (((Fl_Round_Button *)child(i))->value() !=1)

		((Fl_Round_Button *)child(i))->setonly();

	}

}