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/***************************************************************************
* Copyright (C) 2007-2012 by Ilya Kotov *
* forkotov02@hotmail.ru *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <QTimer>
#include <QSettings>
#include <QPainter>
#include <QMenu>
#include <QActionGroup>
#include <qmmp/buffer.h>
#include <qmmp/output.h>
#include <math.h>
#include <stdlib.h>
#include "fft.h"
#include "inlines.h"
#include "analyzer.h"
#define VISUAL_NODE_SIZE 512 //samples
#define VISUAL_BUFFER_SIZE (5*VISUAL_NODE_SIZE)
Analyzer::Analyzer (QWidget *parent)
: Visual (parent), m_fps (20)
{
QSettings settings(Qmmp::configFile(), QSettings::IniFormat);
restoreGeometry(settings.value("Analyzer/geometry").toByteArray());
setFixedSize(2*300-30,105);
m_pixmap = QPixmap (75,20);
m_timer = new QTimer (this);
connect(m_timer, SIGNAL (timeout()), this, SLOT (timeout()));
m_left_buffer = new short[VISUAL_BUFFER_SIZE];
m_right_buffer = new short[VISUAL_BUFFER_SIZE];
m_buffer_at = 0;
clear();
setWindowTitle (tr("Qmmp Analyzer"));
double peaks_speed[] = { 0.05, 0.1, 0.2, 0.4, 0.8 };
double analyzer_speed[] = { 1.2, 1.8, 2.2, 2.8, 2.4 };
int intervals[] = { 20 , 40 , 100 , 200 };
m_peaks_falloff =
peaks_speed[settings.value("Analyzer/peaks_falloff", 3).toInt()-1];
m_analyzer_falloff =
analyzer_speed[settings.value("Analyzer/analyzer_falloff", 3).toInt()-1];
m_show_peaks = settings.value("Analyzer/show_peaks", true).toBool();
m_timer->setInterval(intervals[settings.value("Analyzer/refresh_rate", 2).toInt() - 1]);
m_color1.setNamedColor(settings.value("Analyzer/color1", "Green").toString());
m_color2.setNamedColor(settings.value("Analyzer/color2", "Yellow").toString());
m_color3.setNamedColor(settings.value("Analyzer/color3", "Red").toString());
m_bgColor.setNamedColor(settings.value("Analyzer/bg_color", "Black").toString());
m_peakColor.setNamedColor(settings.value("Analyzer/peak_color", "Cyan").toString());
}
Analyzer::~Analyzer()
{
delete [] m_left_buffer;
delete [] m_right_buffer;
}
void Analyzer::clear()
{
m_buffer_at = 0;
for (int i = 0; i< 75; ++i)
{
m_intern_vis_data[i] = 0;
m_peaks[i] = 0;
}
update();
}
void Analyzer::add (unsigned char *data, qint64 size, int chan)
{
if (!m_timer->isActive ())
return;
if(VISUAL_BUFFER_SIZE == m_buffer_at)
{
m_buffer_at -= VISUAL_NODE_SIZE;
memmove(m_left_buffer, m_left_buffer + VISUAL_NODE_SIZE, m_buffer_at << 1);
memmove(m_right_buffer, m_right_buffer + VISUAL_NODE_SIZE, m_buffer_at << 1);
return;
}
int frames = qMin((int)size/chan >> 1, VISUAL_BUFFER_SIZE - m_buffer_at);
if (chan >= 2)
{
stereo16_from_multichannel(m_left_buffer + m_buffer_at,
m_right_buffer + m_buffer_at,(short *) data, frames, chan);
}
else
{
memcpy(m_left_buffer + m_buffer_at, (short *) data, frames << 1);
memcpy(m_right_buffer + m_buffer_at, (short *) data, frames << 1);
}
m_buffer_at += frames;
}
void Analyzer::timeout()
{
mutex()->lock ();
if(m_buffer_at < VISUAL_NODE_SIZE)
{
mutex()->unlock ();
return;
}
process (m_left_buffer, m_right_buffer);
m_buffer_at -= VISUAL_NODE_SIZE;
memmove(m_left_buffer, m_left_buffer + VISUAL_NODE_SIZE, m_buffer_at << 1);
memmove(m_right_buffer, m_right_buffer + VISUAL_NODE_SIZE, m_buffer_at << 1);
mutex()->unlock ();
update();
}
void Analyzer::paintEvent (QPaintEvent * e)
{
QPainter painter (this);
painter.fillRect(e->rect(),m_bgColor);
draw(&painter);
}
void Analyzer::hideEvent (QHideEvent *)
{
m_timer->stop();
}
void Analyzer::showEvent (QShowEvent *)
{
m_timer->start();
}
void Analyzer::closeEvent (QCloseEvent *event)
{
//save geometry
QSettings settings(Qmmp::configFile(), QSettings::IniFormat);
settings.setValue("Analyzer/geometry", saveGeometry());
Visual::closeEvent(event); //removes visualization before class deleting
}
void Analyzer::process (short *left, short *right)
{
static fft_state *state = 0;
if (!state)
state = fft_init();
short dest_l[256];
short dest_r[256];
const int xscale_short[] =
{
0, 1, 2, 3, 4, 5, 6, 7, 8, 11, 15, 20, 27,
36, 47, 62, 82, 107, 141, 184, 255
};
calc_freq (dest_l, left);
calc_freq (dest_r, right);
const double y_scale = 3.60673760222; /* 20.0 / log(256) */
int yl,yr, j;
for (int i = 0; i < 19; i++)
{
yl = yr = 0;
for (j = xscale_short[i]; j < xscale_short[i + 1]; j++)
{
if (dest_l[j] > yl)
yl = dest_l[j];
if (dest_r[j] > yr)
yr = dest_r[j];
}
yl >>= 7;
yr >>= 7;
int magnitude_l = 0;
int magnitude_r = 0;
if (yl)
{
magnitude_l = int(log (yl) * y_scale);
if (magnitude_l > 15)
magnitude_l = 15;
if (magnitude_l < 0)
magnitude_l = 0;
}
if (yr)
{
magnitude_r = int(log (yr) * y_scale);
if (magnitude_r > 15)
magnitude_r = 15;
if (magnitude_r < 0)
magnitude_r = 0;
}
m_intern_vis_data[i] -= m_analyzer_falloff;
m_intern_vis_data[i] = magnitude_l > m_intern_vis_data[i]
? magnitude_l : m_intern_vis_data[i];
m_intern_vis_data[37-i] -= m_analyzer_falloff;
m_intern_vis_data[37-i] = magnitude_r > m_intern_vis_data[37-i]
? magnitude_r : m_intern_vis_data[37-i];
if (m_show_peaks)
{
m_peaks[i] -= m_peaks_falloff;
m_peaks[i] = magnitude_l > m_peaks[i] ? magnitude_l : m_peaks[i];
m_peaks[37-i] -= m_peaks_falloff;
m_peaks[37-i] = magnitude_r > m_peaks[37-i] ? magnitude_r : m_peaks[37-i];
}
}
}
void Analyzer::draw (QPainter *p)
{
QBrush brush(Qt::SolidPattern);
for (int j = 0; j < 19; ++j)
{
for (int i = 0; i <= m_intern_vis_data[j]; ++i)
{
if (i <= 5)
brush.setColor(m_color1);
else if (i > 5 && i <= 10)
brush.setColor(m_color2);
else
brush.setColor(m_color3);
p->fillRect (j*15+1, height() - i*7, 12, 4, brush);
}
for (int i = 0; i <= m_intern_vis_data[19+j]; ++i)
{
if (i <= 5)
brush.setColor(m_color1);
else if (i > 5 && i <= 10)
brush.setColor(m_color2);
else
brush.setColor(m_color3);
p->fillRect ((j+19)*15+1, height() - i*7, 12, 4, brush);
}
if (m_show_peaks)
{
p->fillRect (j*15+1, height() - int(m_peaks[j])*7, 12, 4, m_peakColor);
p->fillRect ((j+19)*15+1, height() - int(m_peaks[j+19])*7, 12, 4, m_peakColor);
}
}
}
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