/***************************************************************************
* 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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)
{
m_intern_vis_data = 0;
m_peaks = 0;
m_x_scale = 0;
m_buffer_at = 0;
m_rows = 0;
m_cols = 0;
QSettings settings(Qmmp::configFile(), QSettings::IniFormat);
restoreGeometry(settings.value("Analyzer/geometry").toByteArray());
//setAttribute(Qt::WA_TranslucentBackground);
setMinimumSize(2*300-30,105);
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];
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, 2.4, 2.8 };
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_bgColor.setAlpha(0);
m_peakColor.setNamedColor(settings.value("Analyzer/peak_color", "Cyan").toString());
m_cell_size = settings.value("Analyzer/cells_size", QSize(15, 6)).toSize();
QAction *fullScreenAction = new QAction(this);
fullScreenAction->setShortcut(tr("F"));
connect(fullScreenAction, SIGNAL(triggered()), SLOT(toggleFullScreen()));
addAction(fullScreenAction);
}
Analyzer::~Analyzer()
{
delete [] m_left_buffer;
delete [] m_right_buffer;
if(m_peaks)
delete [] m_peaks;
if(m_intern_vis_data)
delete [] m_intern_vis_data;
if(m_x_scale)
delete [] m_x_scale;
}
void Analyzer::clear()
{
m_buffer_at = 0;
m_rows = 0;
m_cols = 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 object
}
void Analyzer::process (short *left, short *right)
{
static fft_state *state = 0;
if (!state)
state = fft_init();
int rows = (height() - 2) / m_cell_size.height();
int cols = (width() - 2) / m_cell_size.width() / 2;
if(m_rows != rows || m_cols != cols)
{
m_rows = rows;
m_cols = cols;
if(m_peaks)
delete [] m_peaks;
if(m_intern_vis_data)
delete [] m_intern_vis_data;
if(m_x_scale)
delete [] m_x_scale;
m_peaks = new double[m_cols * 2];
m_intern_vis_data = new double[m_cols * 2];
m_x_scale = new int[m_cols + 1];
for(int i = 0; i < m_cols * 2; ++i)
{
m_peaks[i] = 0;
m_intern_vis_data[i] = 0;
}
for(int i = 0; i < m_cols + 1; ++i)
m_x_scale[i] = pow(pow(255.0, 1.0 / m_cols), i);
}
short dest_l[256];
short dest_r[256];
short yl, yr;
int j, k, magnitude_l, magnitude_r;
calc_freq (dest_l, left);
calc_freq (dest_r, right);
double y_scale = (double) 1.25 * m_rows / log(256);
for (int i = 0; i < m_cols; i++)
{
j = m_cols * 2 - i - 1; //mirror index
yl = yr = 0;
magnitude_l = magnitude_r = 0;
if(m_x_scale[i] == m_x_scale[i + 1])
{
yl = dest_l[i];
yr = dest_r[i];
}
for (k = m_x_scale[i]; k < m_x_scale[i + 1]; k++)
{
yl = qMax(dest_l[k], yl);
yr = qMax(dest_r[k], yr);
}
yl >>= 7; //256
yr >>= 7;
if (yl)
{
magnitude_l = int(log (yl) * y_scale);
magnitude_l = qBound(0, magnitude_l, m_rows);
}
if (yr)
{
magnitude_r = int(log (yr) * y_scale);
magnitude_r = qBound(0, magnitude_r, m_rows);
}
m_intern_vis_data[i] -= m_analyzer_falloff * m_rows / 15;
m_intern_vis_data[i] = magnitude_l > m_intern_vis_data[i] ? magnitude_l : m_intern_vis_data[i];
m_intern_vis_data[j] -= m_analyzer_falloff * m_rows / 15;
m_intern_vis_data[j] = magnitude_r > m_intern_vis_data[j] ? magnitude_r : m_intern_vis_data[j];
if (m_show_peaks)
{
m_peaks[i] -= m_peaks_falloff * m_rows / 15;
m_peaks[i] = magnitude_l > m_peaks[i] ? magnitude_l : m_peaks[i];
m_peaks[j] -= m_peaks_falloff * m_rows / 15;
m_peaks[j] = magnitude_r > m_peaks[j] ? magnitude_r : m_peaks[j];
}
}
}
void Analyzer::draw (QPainter *p)
{
QBrush brush(Qt::SolidPattern);
int x = 0;
int rdx = qMax(0, width() - 2 * m_cell_size.width() * m_cols);
for (int j = 0; j < m_cols * 2; ++j)
{
x = j * m_cell_size.width() + 1;
if(j >= m_cols)
x += rdx; //correct right part position
for (int i = 0; i <= m_intern_vis_data[j]; ++i)
{
if (i <= m_rows/3)
brush.setColor(m_color1);
else if (i > m_rows/3 && i <= 2 * m_rows / 3)
brush.setColor(m_color2);
else
brush.setColor(m_color3);
p->fillRect (x, height() - i * m_cell_size.height() + 1,
m_cell_size.width() - 2, m_cell_size.height() - 2, brush);
}
if (m_show_peaks)
{
p->fillRect (x, height() - int(m_peaks[j])*m_cell_size.height() + 1,
m_cell_size.width() - 2, m_cell_size.height() - 2, m_peakColor);
}
}
}
void Analyzer::toggleFullScreen()
{
setWindowState(windowState() ^Qt::WindowFullScreen);
}
