用FMOD实现音频波形图

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QDateTime> #include <QSettings> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); wav.resize(2048); mResult=FMOD::System_Create(&mSystem); connect(&timer, SIGNAL(timeout()), SLOT(onTimer())); if(mResult!=FMOD_OK) { qDebug()<<"error:System_Create"; exit(-1); } mResult=mSystem->init(32,FMOD_INIT_NORMAL,0); if(mResult!=FMOD_OK) { qDebug()<<"error:System->init"; exit(-1); } // ui->toolButton->setText("play"); // ui->toolButton_2->setText("open"); ui->toolButton->setIcon(QPixmap(":/images/play.png")); ui->toolButton_2->setIcon(QPixmap(":/images/file.png")); _curvePlot=new CurvePlot(this); ui->content->addWidget(_curvePlot); _curvePlot->setAdjustVal(0.5); _curvePlot->outPut(); } MainWindow::~MainWindow() { delete ui; } void MainWindow::onTimer() { mDsp->getParameterData(FMOD_DSP_FFT_SPECTRUMDATA,(void **)&fftparameter,0,0,0); for(int j=0;j<fftparameter->length;j++) { wav[j]=fftparameter->spectrum[0][j]*10; } _curvePlot->outPut(wav); uint pos; mChannel->getPosition(&pos,FMOD_TIMEUNIT_MS); ui->horizontalSlider->setValue(pos); pos/=1000; ui->label_2->setText(QString().sprintf(" %02d:%02d", pos/60, pos%60)); bool isPlay; mChannel->isPlaying(&isPlay); if(!isPlay) timer.stop(); } void MainWindow::on_toolButton_clicked() { bool paused; mResult=mChannel->getPaused(&paused); if(!paused) { // ui->toolButton->setText("play"); ui->toolButton->setIcon(QPixmap(":/images/play.png")); mChannel->setPaused(true); timer.stop(); } else { // ui->toolButton->setText("pause"); ui->toolButton->setIcon(QPixmap(":/images/pause.png")); mChannel->setPaused(false); timer.start(300); } } void MainWindow::on_toolButton_2_clicked() { QString filename = QFileDialog::getOpenFileName(); mResult=mSystem->createSound(filename.toLocal8Bit(),FMOD_LOOP_NORMAL|FMOD_2D,0,&mSound); if(mResult!=FMOD_OK) { qDebug()<<"error:System->createSound"; exit(-1); } mResult=mSystem->playSound(mSound,0,false,&mChannel); if(mResult!=FMOD_OK) { qDebug()<<"error:System->playSound"; exit(-1); } // ui->toolButton->setText("pause"); ui->toolButton->setIcon(QPixmap(":/images/pause.png")); mSound->setMode(FMOD_LOOP_OFF); mResult=mSystem->createDSPByType(FMOD_DSP_TYPE_FFT,&mDsp); mResult=mChannel->addDSP(0,mDsp); uint length; mSound->getLength(&length,FMOD_TIMEUNIT_MS); ui->horizontalSlider->setMaximum(length); length/=1000; ui->label->setText(QString().sprintf("%02d:%02d ", length/60, length%60)); mSystem->update(); timer.start(400); } void MainWindow::on_horizontalSlider_sliderMoved(int position) { if(mChannel) mChannel->setPosition(position,FMOD_TIMEUNIT_MS); uint length=position/1000; ui->label_2->setText(QString().sprintf("%02d:%02d ", length/60, length%60)); }