moved into qmmp dir

git-svn-id: http://svn.code.sf.net/p/qmmp-dev/code/trunk/qmmp@12 90c681e8-e032-0410-971d-27865f9a5e38

1 files changed, 163 insertions, 0 deletions

diff --git a/src/eqgraph.cpp b/src/eqgraph.cpp
new file mode 100644
index 000000000..314e504d9
--- /dev/null
+++ b/src/eqgraph.cpp
@@ -0,0 +1,163 @@
+/***************************************************************************
+ *   Copyright (C) 2006 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 <QPainter>
+
+#include "skin.h"
+#include "eqgraph.h"
+
+EQGraph::EQGraph ( QWidget *parent )
+      : PixmapWidget ( parent )
+{
+   m_skin = Skin::getPointer();
+   setPixmap ( m_skin->getEqPart ( Skin::EQ_GRAPH ) );
+   clear();
+   draw();
+   connect ( m_skin, SIGNAL ( skinChanged() ), this, SLOT ( updateSkin() ) );
+}
+
+
+EQGraph::~EQGraph()
+{}
+
+void EQGraph::addValue ( int value )
+{
+   if ( m_values.size() >= 10 )
+      return;
+   m_values.append ( value );
+   if ( m_values.size() == 10 )
+   {
+      draw();
+   }
+}
+
+void EQGraph::clear ()
+{
+   m_values.clear();
+   update();
+}
+
+void EQGraph::init_spline ( double * x, double * y, int n, double * y2 )
+{
+   int i, k;
+   double p, qn, sig, un, *u;
+
+   //u = ( gfloat * ) g_malloc ( n * sizeof ( gfloat ) );
+   u = new double[n];
+
+   y2[0] = u[0] = 0.0;
+
+   for ( i = 1; i < n - 1; i++ )
+   {
+      sig = ( ( double ) x[i] - x[i - 1] ) / ( ( double ) x[i + 1] - x[i - 1] );
+      p = sig * y2[i - 1] + 2.0;
+      y2[i] = ( sig - 1.0 ) / p;
+      u[i] =
+          ( ( ( double ) y[i + 1] - y[i] ) / ( x[i + 1] - x[i] ) ) -
+          ( ( ( double ) y[i] - y[i - 1] ) / ( x[i] - x[i - 1] ) );
+      u[i] = ( 6.0 * u[i] / ( x[i + 1] - x[i - 1] ) - sig * u[i - 1] ) / p;
+   }
+   qn = un = 0.0;
+
+   y2[n - 1] = ( un - qn * u[n - 2] ) / ( qn * y2[n - 2] + 1.0 );
+   for ( k = n - 2; k >= 0; k-- )
+      y2[k] = y2[k] * y2[k + 1] + u[k];
+   //g_free ( u );
+   delete[] u;
+}
+
+double EQGraph::eval_spline ( double xa[], double ya[], double y2a[], int n, double x )
+{
+   int klo, khi, k;
+   double h, b, a;
+
+   klo = 0;
+   khi = n - 1;
+   while ( khi - klo > 1 )
+   {
+      k = ( khi + klo ) >> 1;
+      if ( xa[k] > x )
+         khi = k;
+      else
+         klo = k;
+   }
+   h = xa[khi] - xa[klo];
+   a = ( xa[khi] - x ) / h;
+   b = ( x - xa[klo] ) / h;
+   return ( a * ya[klo] + b * ya[khi] +
+            ( ( a * a * a - a ) * y2a[klo] +
+              ( b * b * b - b ) * y2a[khi] ) * ( h * h ) / 6.0 );
+}
+
+void EQGraph::draw()
+{
+   if(m_values.size()!=10)
+   {
+       setPixmap ( m_skin->getEqPart ( Skin::EQ_GRAPH ) );
+       return;
+   }
+
+   int i, y, ymin, ymax, py = 0;
+   double x[] = { 0, 11, 23, 35, 47, 59, 71, 83, 97, 109 }, yf[10];
+   double *bands = new double[10];
+
+   for ( int i = 0; i<10; ++i )
+   {
+      bands[i] = m_values.at ( i );
+   }
+   QPixmap pixmap = m_skin->getEqPart ( Skin::EQ_GRAPH );
+
+   init_spline ( x, bands, 10, yf );
+   for ( i = 0; i < 109; i++ )
+   {
+      y = 9 -
+          ( int ) ( ( eval_spline ( x, bands, yf, 10, i ) *
+                      9.0 ) / 20.0 );
+      if ( y < 0 )
+         y = 0;
+      if ( y > 18 )
+         y = 18;
+      if ( !i )
+         py = y;
+      if ( y < py )
+      {
+         ymin = y;
+         ymax = py;
+      }
+      else
+      {
+         ymin = py;
+         ymax = y;
+      }
+      py = y;
+
+      QPainter paint ( &pixmap );
+      paint.drawPixmap ( i, y, m_skin->getEqSpline ( y ) ) ;
+
+
+   }
+   setPixmap ( pixmap );
+   delete [] bands;
+}
+
+void EQGraph::updateSkin()
+{
+   draw();
+}
+