src/analyzers/sonogram.cpp

   1 //
   2 //
   3 // C++ Implementation: Sonogram
   4 //
   5 // Description:
   6 //
   7 //
   8 // Author: Melchior FRANZ <mfranz@kde.org>, (C) 2004
   9 //
  10 // Copyright: See COPYING file that comes with this distribution
  11 //
  12 //
  13
  14 #include <QPainter>
  15 //Added by qt3to4:
  16 #include <QResizeEvent>
  17 #include <QPaintEvent>
  18 #include "debug.h"
  19 #include "sonogram.h"
  20
  21 Sonogram::Sonogram(QWidget *parent) :
  22     Analyzer::Base2D(parent, 16, 9)
  23 {
  24 }
  25
  26
  27 Sonogram::~Sonogram()
  28 {
  29 }
  30
  31
  32 void Sonogram::init()
  33 {
  34 }
  35
  36
  37 void Sonogram::resizeEvent(QResizeEvent *e)
  38 {
  39     DEBUG_BLOCK
  40
  41 //only for gcc < 4.0
  42 #if !( __GNUC__ > 4 || ( __GNUC__ == 4 && __GNUC_MINOR__ >= 0 ) )
  43     resizeForBands(height() < 128 ? 128 : height());
  44 #endif
  45
  46         Analyzer::Base2D::resizeEvent( e );
  47 //     p.drawPixmap( 0, 0, background() )
  48 //     bitBlt(this, 0, 0, background());
  49 }
  50
  51
  52 void Sonogram::analyze(const Scope &s)
  53 {
  54     Q_UNUSED( s )
  55 //     Analyzer::interpolate( s, m_scope );
  56     update();
  57 }
  58
  59 void
  60 Sonogram::paintEvent( QPaintEvent * )
  61 {
  62     int x = width() - 1;
  63     QColor c;
  64     QPainter p( this );
  65
  66 //     bitBlt(canvas(), 0, 0, canvas(), 1, 0, x, height());
  67 //     p.drawPixmap( 0, 0, this, 1, 0, x, height() );
  68     const Scope &s = m_scope;
  69     Scope::const_iterator it = s.begin(), end = s.end();
  70     for (int y = height() - 1; y;) {
  71         if (it >= end || *it < .005)
  72             c = p.background().color();
  73         else if (*it < .05)
  74             c.setHsv(95, 255, 255 - int(*it * 4000.0));
  75         else if (*it < 1.0)
  76             c.setHsv(95 - int(*it * 90.0), 255, 255);
  77         else
  78             c = Qt::red;
  79
  80         p.setPen(c);
  81         p.drawPoint(x, y--);
  82
  83         if (it < end)
  84             ++it;
  85     }
  86 }
  87
  88
  89 void Sonogram::transform(Scope &scope)
  90 {
  91     float *front = static_cast<float*>(&scope.front());
  92     m_fht->power2(front);
  93     m_fht->scale(front, 1.0 / 256);
  94     scope.resize( m_fht->size() / 2 );
  95 }
  96
  97
  98 void Sonogram::demo()
  99 {
 100     analyze(Scope(m_fht->size(), 0));
 101 }
 102