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/***************************************************************************
* Copyright (C) 2015 by Pere RÃ fols Soler *
* sapista2@gmail.com *
* *
* 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 "dynplot.h"
#include "colors.h"
#include <iostream>
#include <iomanip>
#include <cstring>
#include <cmath>
#define CURVE_BORDER 1.5
#define CURVE_MARGIN 15
#define CURVE_TEXT_OFFSET 18
#define PLOT_WIDTH_HEIGHT 250
#define DATA_RANGE_MIN -60.0
#define DATA_RANGE_MAX 10.0
#define GRID_STEP 10.0
PlotDynCurve::PlotDynCurve(bool isCompressor):
m_Ratio(1.0), m_Range(-100.0), m_Knee(0.0), m_Threshold(0.0), m_Makeup(0.0), m_GainReduction(0.0), m_InputVu(-100.0), m_bIsCompressor(isCompressor)
{
set_size_request(PLOT_WIDTH_HEIGHT, PLOT_WIDTH_HEIGHT);
}
PlotDynCurve::~PlotDynCurve()
{
}
void PlotDynCurve::set_gainreduction(double gainreduction)
{
m_GainReduction = gainreduction != 0.0 ? 20.0*log10(gainreduction) : -100.0;
redraw();
}
void PlotDynCurve::set_inputvu(double inputvu)
{
m_InputVu = inputvu != 0.0 ? 20.0*log10(inputvu) : -100.0;
redraw();
}
void PlotDynCurve::set_knee(double knee)
{
m_Knee = knee;
redraw();
}
void PlotDynCurve::set_makeup(double makeup)
{
m_Makeup = makeup;
redraw();
}
void PlotDynCurve::set_range(double range)
{
m_Range = range;
redraw();
}
void PlotDynCurve::set_ratio(double ratio)
{
m_Ratio = ratio;
redraw();
}
void PlotDynCurve::set_threshold(double threshold)
{
m_Threshold = threshold;
redraw();
}
void PlotDynCurve::redraw()
{
Glib::RefPtr<Gdk::Window> win = get_window();
if(win)
{
Gdk::Rectangle r(0, 0, get_allocation().get_width(), get_allocation().get_height());
win->invalidate_rect(r, false);
}
}
double PlotDynCurve::dB2PixelsX(double db)
{
const double m = ((double)width - 2*CURVE_MARGIN - CURVE_TEXT_OFFSET)/((double)(DATA_RANGE_MAX - DATA_RANGE_MIN));
const double n = CURVE_MARGIN + CURVE_TEXT_OFFSET - m*DATA_RANGE_MIN;
return m*db + n;
}
double PlotDynCurve::dB2PixelsY(double db)
{
const double m = (2*CURVE_MARGIN + CURVE_TEXT_OFFSET - (double)height)/((double)(DATA_RANGE_MAX - DATA_RANGE_MIN));
const double n = ((double)height) - CURVE_MARGIN - CURVE_TEXT_OFFSET - m*DATA_RANGE_MIN;
return m*db + n;
}
bool PlotDynCurve::on_expose_event(GdkEventExpose* event)
{
Glib::RefPtr<Gdk::Window> window = get_window();
if(window)
{
Gtk::Allocation allocation = get_allocation();
width = allocation.get_width();
height = allocation.get_height();
Cairo::RefPtr<Cairo::Context> cr = window->create_cairo_context();
//Paint backgroud
cr->save();
cr->set_source_rgb(BACKGROUND_R, BACKGROUND_G, BACKGROUND_B);
cr->paint(); //Fill all with background color
cr->restore();
//Draw an interesting frame
cr->save();
double radius = height / 50.0;
double degrees = M_PI / 180.0;
cr->begin_new_sub_path();
cr->arc (width - CURVE_BORDER - radius, CURVE_BORDER + radius, radius, -90 * degrees, 0 * degrees);
cr->arc (width - CURVE_BORDER - radius, height - CURVE_BORDER - radius, radius, 0 * degrees, 90 * degrees);
cr->arc (CURVE_BORDER + radius, height- CURVE_BORDER - radius, radius, 90 * degrees, 180 * degrees);
cr->arc ( CURVE_BORDER + radius, CURVE_BORDER + radius, radius, 180 * degrees, 270 * degrees);
cr->close_path();
Cairo::RefPtr<Cairo::LinearGradient> bkg_gradient_ptr = Cairo::LinearGradient::create(width/2, CURVE_BORDER, width/2, height - CURVE_BORDER);
bkg_gradient_ptr->add_color_stop_rgba (0.0, 0.1, 0.1, 0.1, 0.6 );
bkg_gradient_ptr->add_color_stop_rgba (0.5, 0.2, 0.3, 0.3, 0.3 );
bkg_gradient_ptr->add_color_stop_rgba (1.0, 0.1, 0.1, 0.1, 0.6 );
cr->set_source(bkg_gradient_ptr);
cr->fill_preserve();
cr->set_line_width(1.0);
cr->set_source_rgb(0.3, 0.3, 0.4);
cr->stroke();
cr->restore();
//Draw the grid
cr->save();
cr->set_source_rgb(0.3, 0.3, 0.3);
cr->set_line_width(1);
for(double i = DATA_RANGE_MIN; i <= DATA_RANGE_MAX; i+=GRID_STEP)
{
//Vertical grid
cr->move_to( dB2PixelsX(i) + 0.5, CURVE_MARGIN);
cr->line_to( dB2PixelsX(i) + 0.5, height - CURVE_MARGIN - CURVE_TEXT_OFFSET);
//Horizontal grid
cr->move_to( CURVE_MARGIN + CURVE_TEXT_OFFSET, dB2PixelsY(i) + 0.5);
cr->line_to( width - CURVE_MARGIN, dB2PixelsY(i) + 0.5);
cr->stroke();
}
cr->restore();
//Draw text with pango to grid
cr->save();
cr->set_source_rgb(0.6, 0.6, 0.6);
Glib::RefPtr<Pango::Layout> pangoLayout = Pango::Layout::create(cr);
Pango::FontDescription font_desc("sans 9px");
pangoLayout->set_font_description(font_desc);
pangoLayout->set_alignment(Pango::ALIGN_RIGHT);
for(double i = DATA_RANGE_MIN; i <= DATA_RANGE_MAX; i+=GRID_STEP)
{
std::stringstream ss;
ss<< std::setprecision(2) << i;
pangoLayout->set_text(ss.str());
cr->move_to(dB2PixelsX(i) - 3.5, height - CURVE_MARGIN - CURVE_TEXT_OFFSET + 3.5);
pangoLayout->show_in_cairo_context(cr);
cr->move_to(CURVE_MARGIN, dB2PixelsY(i) - 3.5);
pangoLayout->show_in_cairo_context(cr);
cr->stroke();
}
cr->restore();
//Plot InputVU and GainReduction
double prange = 0.05*(m_InputVu - DATA_RANGE_MIN);
cr->save();
cr->rectangle(CURVE_MARGIN + CURVE_TEXT_OFFSET + 0.5, CURVE_MARGIN + 0.5, width - 2*CURVE_MARGIN - CURVE_TEXT_OFFSET, height - 2*CURVE_MARGIN - CURVE_TEXT_OFFSET);
cr->clip();
cr->begin_new_sub_path();
cr->move_to(dB2PixelsX(DATA_RANGE_MIN), dB2PixelsY(DATA_RANGE_MIN));
cr->line_to(dB2PixelsX(DATA_RANGE_MIN), dB2PixelsY(DATA_RANGE_MIN + m_Makeup));
cr->line_to( dB2PixelsX(m_InputVu + prange), dB2PixelsY(m_InputVu + prange - m_GainReduction + m_Makeup) );
cr->line_to( dB2PixelsX(m_InputVu + prange), dB2PixelsY(DATA_RANGE_MIN));
cr->close_path();
bkg_gradient_ptr = Cairo::LinearGradient::create(dB2PixelsX(DATA_RANGE_MIN), dB2PixelsY(DATA_RANGE_MIN),dB2PixelsX(m_InputVu + prange), dB2PixelsY(DATA_RANGE_MIN) );
bkg_gradient_ptr->add_color_stop_rgba (0.0, 0.1, 0.2, 0.8, 0.4 );
bkg_gradient_ptr->add_color_stop_rgba (0.9, 0.1, 0.6, 0.4, 0.3 );
bkg_gradient_ptr->add_color_stop_rgba (1.0, 0.1, 0.6, 0.4, 0.0 );
cr->set_source(bkg_gradient_ptr);
cr->fill();
cr->restore();
//Draw the curve
cr->save();
cr->rectangle(CURVE_MARGIN + CURVE_TEXT_OFFSET + 0.5, CURVE_MARGIN + 0.5, width - 2*CURVE_MARGIN - CURVE_TEXT_OFFSET, height - 2*CURVE_MARGIN - CURVE_TEXT_OFFSET);
cr->clip();
cr->move_to( dB2PixelsX(DATA_RANGE_MIN) + 0.5, dB2PixelsY(DATA_RANGE_MIN) + 0.5 );
double knee_range, y_dB;
if(m_bIsCompressor)
{
for(double x_dB = DATA_RANGE_MIN; x_dB <= DATA_RANGE_MAX; x_dB += 1.0)
{
knee_range = 2.0*(x_dB - m_Threshold);
if (knee_range < -m_Knee)
{
//Under Threshold
y_dB = x_dB;
}
else if(knee_range >= m_Knee )
{
//Over Threshold
y_dB = m_Threshold + (x_dB - m_Threshold)/m_Ratio;
}
else
{
//On Knee
y_dB = x_dB + ((1.0/m_Ratio -1.0)*(x_dB - m_Threshold + m_Knee/2.0)*(x_dB - m_Threshold + m_Knee/2.0))/(2.0*m_Knee);
}
y_dB += m_Makeup;
cr->line_to( dB2PixelsX(x_dB) + 0.5, dB2PixelsY(y_dB) + 0.5);
}
}
else
{
//Draw Expander/Gate
for(double x_dB = DATA_RANGE_MIN; x_dB <= DATA_RANGE_MAX; x_dB += 1.0)
{
knee_range = 2.0*(x_dB - m_Threshold);
if (knee_range < -m_Knee)
{
//Under Threshold
y_dB = m_Threshold + (x_dB - m_Threshold)*m_Ratio;
}
else if(knee_range >= m_Knee )
{
//Over Threshold
y_dB = x_dB;
}
else
{
//On Knee
y_dB = x_dB + ((1.0 - m_Ratio)*(x_dB - m_Threshold - m_Knee/2)*(x_dB - m_Threshold - m_Knee/2))/(2*m_Knee);
}
if( y_dB < x_dB + m_Range )
{
y_dB = x_dB + m_Range;
}
cr->line_to( dB2PixelsX(x_dB) + 0.5, dB2PixelsY(y_dB) + 0.5);
}
}
cr->set_line_width(1.0);
cr->set_line_cap(Cairo::LINE_CAP_ROUND);
cr->set_source_rgb(1,1,1);
cr->stroke();
cr->restore();
//draw de outer grind box
cr->save();
cr->set_source_rgb(0.3, 0.3, 0.3);
cr->set_line_width(1);
cr->move_to(CURVE_MARGIN + CURVE_TEXT_OFFSET + 0.5, CURVE_MARGIN + 0.5);
cr->line_to(width - CURVE_MARGIN + 0.5, CURVE_MARGIN + 0.5);
cr->line_to(width - CURVE_MARGIN + 0.5, height - CURVE_MARGIN - CURVE_TEXT_OFFSET + 0.5);
cr->line_to(CURVE_MARGIN + CURVE_TEXT_OFFSET + 0.5 , height - CURVE_MARGIN - CURVE_TEXT_OFFSET + 0.5);
cr->line_to(CURVE_MARGIN + CURVE_TEXT_OFFSET + 0.5, CURVE_MARGIN + 0.5);
cr->stroke();
cr->restore();
}
return true;
}
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