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#include "ampfrm.h"
#include <qwt_knob.h>
#include <qlabel.h>
#include <qfont.h>
#include <qwt_thermo.h>
#include <qwt_math.h>
AmpFrame::AmpFrame(QWidget *p, const char *name):
QFrame(p, name)
{
setFont(QFont("Helvetica", 10, QFont::Bold));
knbVolume = new QwtKnob(this);
knbBass = new QwtKnob(this);
knbBalance = new QwtKnob(this);
knbTreble = new QwtKnob(this);
QLabel *lblVolume = new QLabel("Volume",this);
QLabel *lblTreble = new QLabel("Treble", this);
QLabel *lblBass = new QLabel("Bass", this);
QLabel *lblBalance = new QLabel("Balance", this);
knbVolume->setRange(0.0,10,0.1);
knbBalance->setRange(-10.0, 10.0,0.1);
knbBalance->setScaleMaxMajor(10);
knbTreble->setRange(-10.0, 10.0, 0.1);
knbTreble->setScaleMaxMajor(10);
knbBass->setRange(-10.0, 10.0,0.1);
knbBass->setScaleMaxMajor(10);
knbVolume->setGeometry(20,10,100,100);
knbVolume->setValue(2.0);
lblVolume->setGeometry(20,100,100,15);
lblVolume->setAlignment(Qt::AlignCenter);
knbVolume->setScaleMaxMajor(10);
knbBalance->setGeometry(140,10,100,100);
lblBalance->setGeometry(140,100,100,15);
lblBalance->setAlignment(Qt::AlignCenter);
knbTreble->setGeometry(260,10,100,100);
lblTreble->setGeometry(260,100,100,15);
lblTreble->setAlignment(Qt::AlignCenter);
knbBass->setGeometry(380,10,100,100);
lblBass->setGeometry(380,100,100,15);
lblBass->setAlignment(Qt::AlignCenter);
QLabel *lblLeft = new QLabel("Left [dB]",this);
QLabel *lblRight = new QLabel("Right [dB]", this);
thmLeft = new QwtThermo(this);
thmRight = new QwtThermo(this);
thmLeft->setGeometry(540,10,60,90);
thmLeft->setPipeWidth(6);
thmLeft->setRange(-40,10);
thmLeft->setFillColor(Qt::green);
thmLeft->setAlarmColor(Qt::red);
thmLeft->setAlarmLevel(0.0);
thmLeft->setAlarmEnabled(TRUE);
thmRight->setGeometry(610,10,60,90);
thmRight->setPipeWidth(6);
thmRight->setRange(-40,10);
thmRight->setFillColor(Qt::green);
thmRight->setAlarmColor(Qt::red);
thmRight->setAlarmLevel(0.0);
thmRight->setAlarmEnabled(TRUE);
lblLeft->setGeometry(550,100, 60,15);
lblRight->setGeometry(620,100,60,15);
setFixedSize(720,120);
(void)startTimer(50);
}
void AmpFrame::timerEvent(QTimerEvent *)
{
double sig_l, sig_r, sig_bass, sig_mid_l, sig_mid_r, sig_trbl_l, sig_trbl_r;
double balance;
static double phs = 0;
//
// This amplifier generates its own input signal...
//
sig_bass = (1.0 + 0.1 * knbBass->value()) * sin(13.0 * phs);
sig_mid_l = sin(17.0 * phs);
sig_mid_r = cos(17.5 * phs);
sig_trbl_l = 0.5 * (1.0 + 0.1 * knbTreble->value()) * sin(35.0 * phs);
sig_trbl_r = 0.5 * (1.0 + 0.1 * knbTreble->value()) * sin(34.0 * phs);
sig_l = 0.05 * master * knbVolume->value() * qwtSqr(sig_bass + sig_mid_l + sig_trbl_l);
sig_r = 0.05 * master * knbVolume->value() * qwtSqr(sig_bass + sig_mid_r + sig_trbl_r);
balance = 0.1 * knbBalance->value();
if (balance > 0)
sig_l *= (1.0 - balance);
else
sig_r *= (1.0 + balance);
if (sig_l > 0.01)
sig_l = 20.0 * log10(sig_l);
else
sig_l = -40.0;
if (sig_r > 0.01)
sig_r = 20.0 * log10(sig_r);
else
sig_r = - 40.0;
thmLeft->setValue(sig_l);
thmRight->setValue(sig_r);
phs += M_PI / 100;
if (phs > M_PI) phs = 0;
}
void AmpFrame::setMaster(double v)
{
master = v;
}
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