Qt录音程序

源地址：http://www.oschina.net/code/snippet_1243295_48623

[代码] [C/C++]代码

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mainwindow.cpp   #include "mainwindow.h" #include "ui_mainwindow.h"   MainWindow::MainWindow(QWidget *parent) :     QMainWindow(parent),     ui(new Ui::MainWindow) {     ui->setupUi(this); }   MainWindow::~MainWindow() {     delete ui; } //开始录音 void MainWindow::on_start_clicked() {     file =new QFile();     file->setFileName("E:\\nihao");//设置其实设置音频文件的存放路径(输入音频名及存放路径)     bool is_open =file->open(QIODevice::WriteOnly | QIODevice::Truncate);     if(!is_open)     {         qDebug()<<"打开失败失败"<<endl;         exit(1);     }       QAudioFormat format;     format.setSampleRate(8000);     format.setChannelCount(1);     format.setSampleSize(8);     format.setCodec("audio/wav");     format.setByteOrder(QAudioFormat::LittleEndian);     format.setSampleType(QAudioFormat::UnSignedInt);       QAudioDeviceInfo info = QAudioDeviceInfo::defaultInputDevice();     QString str=info.deviceName();     qDebug()<<"使用的录音设备是:"<<str<<endl;     if(!info.isFormatSupported(format))     {         format = info.nearestFormat(format);     }     input = new QAudioInput(format, this);     ui->label->setText("录音开始......");     input->start(file);   }   //停止录音 void MainWindow::on_finish_clicked() {     input->stop();     file->close();     ui->label->setText("录音结束......"); } //播放录音 void MainWindow::on_play_clicked() {      file->setFileName("E:\\test.wav");      file->open(QIODevice::ReadOnly);        QAudioFormat format;      format.setSampleRate(8000);      format.setChannelCount(1);      format.setSampleSize(8);      format.setCodec("audio/wav");      format.setByteOrder(QAudioFormat::LittleEndian);      format.setSampleType(QAudioFormat::UnSignedInt);        output = new QAudioOutput(format);      output->start(file); }   mainwindow.h   #ifndef MAINWINDOW_H #define MAINWINDOW_H   #include <QMainWindow> #include <QMultimedia> #include <QFile> #include <QDebug> #include <QAudioFormat> #include <QAudioDeviceInfo> #include <QAudioInput> #include <QTimer> #include <QAudioOutput> namespace Ui { class MainWindow; }   class MainWindow : public QMainWindow {     Q_OBJECT   public:     explicit MainWindow(QWidget *parent = 0);     ~MainWindow();   private slots:     void on_start_clicked();       void on_finish_clicked();       void on_play_clicked();   private:     Ui::MainWindow *ui;     QFile *file;     QAudioInput * input;     QAudioOutput* output; };   #endif // MAINWINDOW_H