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https://github.com/ElvishArtisan/rivendell.git
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2021-03-11 Fred Gleason <fredg@paravelsystems.com>
* Added a 'RDWaveWidget' class. Signed-off-by: Fred Gleason <fredg@paravelsystems.com>
This commit is contained in:
Fred Gleason
312
lib/rdwavewidget.cpp
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312
lib/rdwavewidget.cpp
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// rdwavewidget.cpp
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//
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// Widget for displaying audio waveforms
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//
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// (C) Copyright 2021 Fred Gleason <fredg@paravelsystems.com>
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License version 2 as
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// published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public
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// License along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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#include "rdapplication.h"
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#include "rdcut.h"
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#include "rdpeaksexport.h"
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#include "rdwavewidget.h"
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RDWaveWidget::RDWaveWidget(RDWaveWidget::TrackMode mode,int height,
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QWidget *parent)
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: QWidget(parent)
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{
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d_channels=0;
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d_audio_gain=0.0;
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d_x_shrink=1;
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d_track_mode=mode;
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d_height=(qreal)height;
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d_view=new QGraphicsView(this);
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d_scene=NULL;
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}
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RDWaveWidget::~RDWaveWidget()
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{
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delete d_view;
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if(d_scene!=NULL) {
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delete d_scene;
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}
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}
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QSize RDWaveWidget::sizeHint() const
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{
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return QSize(1000,d_height+20);
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// return QSize(1000,d_height+42);
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}
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QSizePolicy RDWaveWidget::sizePolicy() const
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{
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return QSizePolicy(QSizePolicy::MinimumExpanding,QSizePolicy::Fixed);
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}
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QGraphicsScene *RDWaveWidget::scene() const
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{
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return d_scene;
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}
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qreal RDWaveWidget::audioGain() const
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{
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return d_audio_gain;
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}
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int RDWaveWidget::shrinkFactor() const
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{
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return d_x_shrink;
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}
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void RDWaveWidget::setAudioGain(qreal gain)
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{
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if(gain!=d_audio_gain) {
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d_audio_gain=gain;
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WriteWave();
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}
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}
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void RDWaveWidget::setShrinkFactor(int sf)
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{
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if(sf!=d_x_shrink) {
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d_x_shrink=sf;
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WriteWave();
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}
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}
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bool RDWaveWidget::setCut(QString *err_msg,unsigned cartnum,int cutnum)
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{
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clear();
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//
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// Get Cut Info
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//
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RDCut *cut=new RDCut(cartnum,cutnum);
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if(!cut->exists()) {
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*err_msg=tr("No such cart/cut!");
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delete cut;
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return false;
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}
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d_channels=cut->channels();
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delete cut;
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//
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// Get Cut Energy Data
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//
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RDPeaksExport::ErrorCode err_code;
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RDPeaksExport *conv=new RDPeaksExport(this);
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conv->setCartNumber(cartnum);
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conv->setCutNumber(cutnum);
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if((err_code=conv->runExport(rda->user()->name(),rda->user()->password()))!=
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RDPeaksExport::ErrorOk) {
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*err_msg=tr("Energy export failed")+": "+RDPeaksExport::errorText(err_code);
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delete conv;
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return false;
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}
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if((d_track_mode==RDWaveWidget::SingleTrack)&&(d_channels==2)) { // Mix-down
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for(unsigned i=0;i<conv->energySize();i+=2) {
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uint32_t frame=
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((uint32_t)conv->energy(i)+(uint32_t)conv->energy(i+1))/2;
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d_energy_data.push_back(frame);
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}
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}
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else { // Pass-through
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for(unsigned i=0;i<conv->energySize();i++) {
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d_energy_data.push_back(conv->energy(i));
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}
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}
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delete conv;
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return loadCut();
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}
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void RDWaveWidget::clear()
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{
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d_view->setScene(NULL);
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delete d_scene;
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d_scene=NULL;
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d_energy_data.clear();
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d_x_shrink=1;
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}
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QList<uint16_t> RDWaveWidget::energyData() const
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{
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return d_energy_data;
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}
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bool RDWaveWidget::loadCut()
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{
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/*
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switch(d_track_mode) {
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case RDWaveWidget::SingleTrack:
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d_scene=new RDWaveScene(d_energy_data,d_x_shrink,0.0,d_height,this);
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break;
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case RDWaveWidget::MultiTrack:
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switch(d_channels) {
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case 1:
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d_scene=new RDWaveScene(d_energy_data,d_x_shrink,0.0,d_height,this);
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break;
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case 2:
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d_scenes.push_back(new RDWaveScene(d_energy_datas.front(),d_x_shrink,0.0,
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d_height/2,this));
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d_views.front()->setScene(d_scenes.back());
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d_scenes.push_back(new RDWaveScene(d_energy_datas.back(),d_x_shrink,0.0,
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d_height/2,this));
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d_views.back()->setScene(d_scenes.back());
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d_views.front()->show();
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d_views.back()->show();
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break;
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}
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break;
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}
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d_view->setScene(d_scene);
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*/
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WriteWave();
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return true;
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}
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void RDWaveWidget::resizeEvent(QResizeEvent *e)
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{
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int w=size().width();
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int h=size().height();
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d_view->setGeometry(0,0,w,h);
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}
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void RDWaveWidget::WriteWave()
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{
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//
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// Calculate Effective Channels
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//
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int chans=d_channels;
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if(d_track_mode==RDWaveWidget::SingleTrack) {
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chans=1;
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}
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//
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// Get New Scene
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if(d_scene!=NULL) {
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delete d_scene;
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}
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d_scene=new QGraphicsScene(0,0,d_energy_data.size()/d_x_shrink,d_height,this);
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//
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// Gain Ratio
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//
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qreal ratio=exp10(d_audio_gain/20.0);
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//
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// Waveform
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//
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for(int i=0;i<chans;i++) {
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for(int j=i;j<d_energy_data.size();j+=(chans*d_x_shrink)) {
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uint16_t lvl=d_energy_data.at(j);
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for(int k=1;k<d_x_shrink;k++) {
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if(((j+k)<d_energy_data.size())&&(d_energy_data.at(j+k))>lvl) {
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lvl=d_energy_data.at(j+k);
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}
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}
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qreal rlvl=ratio*(qreal)lvl*d_height/(65534.0*(qreal)chans);
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// Bottom half
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d_scene->addRect((qreal)(j/d_x_shrink),
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d_height/((qreal)chans*2.0)+i*d_height/((qreal)chans),
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(qreal)1,
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rlvl,
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QPen(Qt::black),QBrush(Qt::black));
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// Top half
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d_scene->addRect((qreal)(j/d_x_shrink),
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d_height/((qreal)chans*2.0)+i*d_height/((qreal)chans),
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(qreal)1,
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-rlvl,
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QPen(Qt::black),QBrush(Qt::black));
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}
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}
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for(int i=1;i<chans;i++) {
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// Track Divider
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d_scene->addLine(0.0,i*d_height/((qreal)chans),
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d_energy_data.size()/d_x_shrink,i*d_height/((qreal)chans),
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QPen(Qt::gray));
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}
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d_view->setScene(d_scene);
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}
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/*
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void RDWaveWidget::WriteWave()
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{
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//
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// Calculate Effective Channels
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//
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int chans=d_channels;
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if(d_track_mode==RDWaveWidget::SingleTrack) {
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chans=1;
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}
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//
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// Get New Scene
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if(d_scene!=NULL) {
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delete d_scene;
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}
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d_scene=new QGraphicsScene(0,0,d_energy_data.size()/d_x_shrink,d_height,this);
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//
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// Gain Ratio
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//
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qreal ratio=exp10(d_audio_gain/20.0);
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//
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// Waveform
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//
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for(int j=0;j<d_energy_data.size();j+=d_x_shrink) {
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uint16_t lvl=d_energy_data.at(j);
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for(int k=1;k<d_x_shrink;k++) {
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if(((j+k)<d_energy_data.size())&&(d_energy_data.at(j+k))>lvl) {
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lvl=d_energy_data.at(j+k);
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}
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}
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qreal rlvl=ratio*(qreal)lvl*d_height/65534.0;
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// Bottom half
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d_scene->addRect((qreal)(j/d_x_shrink),d_height/2.0,
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(qreal)1,rlvl,
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QPen(Qt::black),QBrush(Qt::black));
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// Top half
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d_scene->addRect((qreal)(j/d_x_shrink),d_height/2.0,
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(qreal)1,-rlvl,
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QPen(Qt::black),QBrush(Qt::black));
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}
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d_view->setScene(d_scene);
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}
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*/
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