--- /dev/null
+/***************************************************************************
+ * Copyright (C) 2010 by Marco Gittler (g.marco@freenet.de) *
+ * *
+ * 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., *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
+ ***************************************************************************/
+
+#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)
+{
+ //QVBoxLayout *vbox=new QVBoxLayout(this);
+ //label=new QLabel();
+ //vbox->addWidget(label);
+ setMinimumHeight(10);
+ setMinimumWidth(10);
+ dbscale << 0 << -1 << -2 << -3 << -4 << -5 << -6 << -8 << -10 << -20 << -40 ;
+ setContextMenuPolicy(Qt::ActionsContextMenu);
+ m_aMonitoringEnabled = new QAction(i18n("Monitor audio signal"), this);
+ m_aMonitoringEnabled->setCheckable(true);
+ m_aMonitoringEnabled->setChecked(true);
+ connect(m_aMonitoringEnabled, SIGNAL(toggled(bool)), this, SLOT(slotSwitchAudioMonitoring(bool)));
+ connect(&m_timer,SIGNAL(timeout()),this,SLOT(slotNoAudioTimeout()));
+ 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;
+ int num_oversample=0;
+ for (int i = 0; i < num_channels; i++) {
+ long val = 0;
+ double over1=0.0;
+ double over2=0.0;
+ for (int s = 0; s < num_samples; s ++) {
+ int sample=abs(data[i+s*num_channels] / 128);
+ val += sample;
+ if (sample==128){
+ num_oversample++;
+ }else{
+ num_oversample=0;
+ }
+ //if 3 samples over max => 1 peak over 0 db (0db=40.0)
+ if (num_oversample>3){
+ over1=41.0/42.0*127;
+ }
+ // 10 samples @max => show max signal
+ if (num_oversample>10){
+ over2=127;
+ }
+
+
+
+ }
+ //max amplitude = 40/42, 3to10 oversamples=41, more then 10 oversamples=42
+ if (over2>0.0){
+ channels.append(over2);
+ } else if (over1>0.0){
+ channels.append(over1);
+ }else
+ channels.append(val / num_samples*40.0/42.0);
+ }
+ showAudio(channels);
+ m_timer.start(1000);
+}
+
+void AudioSignal::slotNoAudioTimeout(){
+ peeks.fill(0);
+ showAudio(QByteArray(2,0));
+ m_timer.stop();
+}
+
+void AudioSignal::showAudio(const QByteArray arr)
+{
+ channels = arr;
+ if (peeks.count()!=channels.count()){
+ peeks=QByteArray(channels.count(),0);
+ peekage=QByteArray(channels.count(),0);
+ }
+ for (int chan=0;chan<peeks.count();chan++)
+ {
+ peekage[chan]=peekage[chan]+1;
+ if ( peeks.at(chan)<arr.at(chan) || peekage.at(chan)>50 )
+ {
+ peekage[chan]=0;
+ peeks[chan]=arr[chan];
+ }
+ }
+ update();
+}
+
+double AudioSignal::valueToPixel(double in)
+{
+ //in=0 -> return 0 (null length from max), in=127/127 return 1 (max length )
+ return 1.0- log10( in)/log10(1.0/127.0);
+}
+
+void AudioSignal::paintEvent(QPaintEvent* /*e*/)
+{
+ if (!m_aMonitoringEnabled->isChecked()) {
+ return;
+ }
+ QPainter p(this);
+ int numchan = channels.size();
+ bool horiz=width() > height();
+ int dbsize=20;
+ bool showdb=width()>(dbsize+40);
+ //valpixel=1.0 for 127, 1.0+(1/40) for 1 short oversample, 1.0+(2/40) for longer oversample
+ for (int i = 0; i < numchan; i++) {
+ //int maxx= (unsigned char)channels[i] * (horiz ? width() : height() ) / 127;
+ double valpixel=valueToPixel((double)(unsigned char)channels[i]/127.0);
+ int maxx= height() * valpixel;
+ int xdelta= height() /42 ;
+ int _y2= (showdb?width()-dbsize:width () ) / numchan - 1 ;
+ int _y1= (showdb?width()-dbsize:width() ) *i/numchan;
+ int _x2= maxx > xdelta ? xdelta - 3 : maxx - 3 ;
+ if (horiz){
+ dbsize=9;
+ showdb=height()>(dbsize);
+ maxx=width()*valpixel;
+ xdelta = width() / 42;
+ _y2=( showdb?height()-dbsize:height() ) / numchan - 1 ;
+ _y1= (showdb?height()-dbsize:height() ) * i/numchan;
+ _x2= maxx > xdelta ? xdelta - 1 : maxx - 1;
+ }
+
+ for (int x = 0; x <= 42; x++) {
+ int _x1= x *xdelta;
+ QColor sig=Qt::green;
+ //value of actual painted digit
+ double ival=(double)_x1/(double)xdelta/42.0;
+ if (ival > 40.0/42.0){
+ sig=Qt::red;
+ }else if ( ival > 37.0/42.0){
+ sig=Qt::darkYellow;
+ }else if ( ival >30.0/42.0){
+ sig=Qt::yellow;
+ }
+ if (maxx > 0) {
+ if (horiz){
+ p.fillRect(_x1, _y1, _x2, _y2, QBrush(sig, Qt::SolidPattern) );
+ }else{
+ p.fillRect(_y1, height()-_x1, _y2,-_x2, QBrush(sig, Qt::SolidPattern) );
+ }
+ maxx -= xdelta;
+ }
+ }
+ int xp=valueToPixel((double)peeks.at(i)/127.0)*(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));
+
+ }
+ if (showdb){
+ //draw db value at related pixel
+ for (int l=0;l<dbscale.size();l++){
+ if (!horiz){
+ double xf=pow(10.0,(double)dbscale.at(l) / 20.0 )*(double)height();
+ p.drawText(width()-20,height()-xf*40.0/42.0+20, QString().sprintf("%d",dbscale.at(l)));
+ }else{
+ double xf=pow(10.0,(double)dbscale.at(l) / 20.0 )*(double)width();
+ p.drawText(xf*40/42-10,height()-2, QString().sprintf("%d",dbscale.at(l)));
+ }
+ }
+ }
+ p.end();
+}
+
+void AudioSignal::slotSwitchAudioMonitoring(bool)
+{
+ emit updateAudioMonitoring();
+}
+
+#include "audiosignal.moc"
projects / kdenlive / blobdiff