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/* -----------------------------------------------------------------------------
*
* Giada - Your Hardcore Loopmachine
*
* -----------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 Giovanni A. Zuliani | Monocasual
*
* This file is part of Giada - Your Hardcore Loopmachine.
*
* Giada - Your Hardcore Loopmachine 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 3 of the License, or (at your option) any later version.
*
* Giada - Your Hardcore Loopmachine 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 Giada - Your Hardcore Loopmachine. If not, see
* <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------- */
#include <cmath>
#include <FL/fl_draw.H>
#include "../../core/const.h"
#include "../../core/kernelAudio.h"
#include "soundMeter.h"
using namespace giada::m;
geSoundMeter::geSoundMeter(int x, int y, int w, int h, const char *L)
: Fl_Box (x, y, w, h, L),
clip (false),
mixerPeak (0.0f),
peak (0.0f),
dbLevel (0.0f),
dbLevelOld(0.0f)
{
}
/* -------------------------------------------------------------------------- */
void geSoundMeter::draw()
{
fl_rect(x(), y(), w(), h(), COLOR_BD_0);
/* peak = the highest value inside the frame */
peak = 0.0f;
float tmp_peak = 0.0f;
tmp_peak = fabs(mixerPeak);
if (tmp_peak > peak)
peak = tmp_peak;
clip = peak >= 1.0f ? true : false; // 1.0f is considered clip
/* dBFS (full scale) calculation, plus decay of -2dB per frame */
dbLevel = 20 * log10(peak);
if (dbLevel < dbLevelOld)
if (dbLevelOld > -G_DB_MIN_SCALE)
dbLevel = dbLevelOld - 2.0f;
dbLevelOld = dbLevel;
/* graphical part */
float px_level = 0.0f;
if (dbLevel < 0.0f)
px_level = ((w()/G_DB_MIN_SCALE) * dbLevel) + w();
else
px_level = w();
fl_rectf(x()+1, y()+1, w()-2, h()-2, COLOR_BG_0);
fl_rectf(x()+1, y()+1, (int) px_level, h()-2, clip || !kernelAudio::getStatus() ? COLOR_ALERT : COLOR_BD_0);
}
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