#include "audiosignal.h"
+#include <KLocale>
+
#include <QVBoxLayout>
#include <QLabel>
+#include <QAction>
#include <QPainter>
#include <QDebug>
#include <QList>
+#include <math.h>
AudioSignal::AudioSignal(QWidget *parent): QWidget(parent)
{
//label=new QLabel();
//vbox->addWidget(label);
setMinimumHeight(10);
+ setMinimumWidth(10);
col << Qt::green << Qt::green << Qt::green << Qt::green << Qt::green << Qt::green << Qt::green << Qt::green << Qt::green << Qt::green ;
col << Qt::yellow << Qt::yellow << Qt::yellow << Qt::yellow << Qt::yellow ;
col << Qt::darkYellow << Qt::darkYellow << Qt::darkYellow;
col << Qt::red << Qt::red;
+ setContextMenuPolicy(Qt::ActionsContextMenu);
+ m_aMonitoringEnabled = new QAction(i18n("Monitor audio signal"), this);
+ m_aMonitoringEnabled->setCheckable(true);
+ connect(m_aMonitoringEnabled, SIGNAL(toggled(bool)), this, SLOT(slotSwitchAudioMonitoring(bool)));
+ addAction(m_aMonitoringEnabled);
+}
+
+AudioSignal::~AudioSignal()
+{
+ delete m_aMonitoringEnabled;
+}
+
+bool AudioSignal::monitoringEnabled() const
+{
+ return m_aMonitoringEnabled->isChecked();
}
+void AudioSignal::slotReceiveAudio(const QVector<int16_t>& data, int, int num_channels, int samples){
+ int num_samples = samples > 200 ? 200 : samples;
+
+ QByteArray channels;
+ for (int i = 0; i < num_channels; i++) {
+ long val = 0;
+ for (int s = 0; s < num_samples; s ++) {
+ val += abs(data[i+s*num_channels] / 128);
+ }
+ channels.append(val / num_samples);
+ }
+ showAudio(channels);
+}
void AudioSignal::showAudio(const QByteArray arr)
{
channels = arr;
}
update();
}
+
+double AudioSignal::valueToPixel(double in,bool db)
+{
+ if (db)
+ {
+ // ratio db(in)/db(0.01) (means: min db value = -40.0 )
+ return 1.0- log10( in)/log10(0.01);
+ }
+ else
+ {
+ return in;
+ }
+}
+
void AudioSignal::paintEvent(QPaintEvent* /*e*/)
{
+ if (!m_aMonitoringEnabled->isChecked()) {
+ return;
+ }
QPainter p(this);
//p.begin();
//p.fillRect(0,0,(unsigned char)channels[0]*width()/255,height()/2,QBrush(Qt::SolidPattern));
//p.fillRect(0,height()/2,(unsigned char)channels[1]*width()/255,height()/2,QBrush(Qt::SolidPattern));
int numchan = channels.size();
+ bool db=true; // show values in db(i)
+ bool horiz=width() > height();
for (int i = 0; i < numchan; i++) {
- int maxx = (unsigned char)channels[i] * width() / 255;
- int xdelta = width() / 20;
- int y1 = height() * i / numchan;
- int _h = height() / numchan - 1;
+ //int maxx= (unsigned char)channels[i] * (horiz ? width() : height() ) / 127;
+ int maxx= (horiz ? width() : height() ) * valueToPixel((double)(unsigned char)channels[i]/127.0,db);
+ int xdelta=(horiz ? width():height() ) /20 ;
+ int _y2= (horiz ? height() :width () ) / numchan - 1 ;
+ int _y1=(horiz ? height():width() ) *i/numchan;
+ int _x2=maxx > xdelta ? xdelta - (horiz?1:3) : maxx - (horiz ?1 :3 );
+
for (int x = 0; x < 20; x++) {
+ int _x1= x *xdelta;
if (maxx > 0) {
- p.fillRect(x * xdelta, y1, maxx > xdelta ? xdelta - 1 : maxx - 1, _h, QBrush(col.at(x), Qt::SolidPattern));
+ //p.fillRect(x * xdelta, y1, maxx > xdelta ? xdelta - 1 : maxx - 1, _h, QBrush(col.at(x), Qt::SolidPattern));
+ p.fillRect(horiz?_x1:_y1, horiz?_y1:height()-_x1, horiz?_x2:_y2,horiz? _y2:-_x2, QBrush(col.at(x), Qt::SolidPattern));
maxx -= xdelta;
}
}
- p.fillRect(peeks.at(i)*width()/255-2,y1,3,_h,QBrush(Qt::black,Qt::SolidPattern));
+ int xp=valueToPixel((double)peeks.at(i)/127.0,db)*(horiz?width():height())-2;
+ p.fillRect(horiz?xp:_y1,horiz?_y1:height()-xdelta-xp,horiz?3:_y2,horiz?_y2:3,QBrush(Qt::black,Qt::SolidPattern));
}
p.end();
}
+
+void AudioSignal::slotSwitchAudioMonitoring(bool)
+{
+ emit updateAudioMonitoring();
+}
+
#include "audiosignal.moc"