qt在windows下实现录音放音同步



qt在windows下实现录音放音同步

本文博客链接:http://blog.csdn.net/jdh99,作者:jdh,转载请注明.

环境：

主机:WIN8

开发环境:Qt5 3.1.2

说明:

做一个类似qq的语音传输的软件，所以测试windows下如何用qt进行语音同步播放

源码:

mainwindow.h

#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QMainWindow> #include <QAudioInput>#include <QAudioOutput>#include <iostream>#include <QFile>#include <QBuffer>namespace Ui {class MainWindow;}class MainWindow : public QMainWindow{    Q_OBJECTpublic:    explicit MainWindow(QWidget *parent = 0);    ~MainWindow();private slots:    void stopRecording();    void finishedPlaying(QAudio::State state);    void readMore();private:    Ui::MainWindow *ui;    QFile outputFile;   // class member.    QAudioInput* audio_in; // class member.    QFile inputFile;   // class member.    QAudioOutput* audio_out; // class member.    QIODevice *myBuffer_in;    QIODevice *myBuffer_out;    //QBuffer Buffer;};#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"#include "ui_mainwindow.h"#include <QDebug>#include <QTimer>MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow){    ui->setupUi(this);    outputFile.setFileName("test.raw");    outputFile.open( QIODevice::WriteOnly | QIODevice::Truncate );    QAudioFormat format;    // set up the format you want, eg.    format.setSampleRate(8000);    format.setChannelCount(1);    format.setSampleSize(16);    format.setCodec("audio/pcm");    format.setByteOrder(QAudioFormat::LittleEndian);    format.setSampleType(QAudioFormat::UnSignedInt);    //format.setSampleType(QAudioFormat::SignedInt);    QAudioDeviceInfo info = QAudioDeviceInfo::defaultInputDevice();    if (!info.isFormatSupported(format)) {       qWarning()<<"default format not supported try to use nearest";       format = info.nearestFormat(format);    }    audio_in = new QAudioInput(format, this);    //QTimer::singleShot(3000, this, SLOT(stopRecording()));    //audio_in->start(&outputFile);    myBuffer_in = audio_in->start();    connect(myBuffer_in, SIGNAL(readyRead()), SLOT(readMore()));    // Records audio for 3000ms    qDebug() <<"record begin!" << endl;    inputFile.setFileName("test.raw");    inputFile.open(QIODevice::ReadOnly);    audio_out = new QAudioOutput(format, this);    connect(audio_out,SIGNAL(stateChanged(QAudio::State)),SLOT(finishedPlaying(QAudio::State)));    //audio_out->start(&inputFile);    //audio_out->start(myBuffer_out);    myBuffer_out = audio_out->start();    qDebug() <<"play begin!" << endl;}MainWindow::~MainWindow(){    delete ui;}void MainWindow::readMore(){    if (!audio_in)        return;    QByteArray m_buffer(2048,0);    qint64 len = audio_in->bytesReady();    qDebug() << "len1 = " << len;    qint64 l = myBuffer_in->read(m_buffer.data(), len);    qDebug() << "len2 = " << l;    myBuffer_out->write(m_buffer);}void MainWindow::stopRecording() {    qDebug() << "enter stop";   audio_in->stop();   outputFile.close();   delete audio_in;   qDebug() <<"record end!" << endl;//   inputFile.setFileName("test.raw");//   inputFile.open(QIODevice::ReadOnly);//   QAudioFormat format;//   // Set up the format, eg.//   format.setSampleRate(8000);//   format.setChannelCount(1);//   format.setSampleSize(16);//   format.setCodec("audio/pcm");//   format.setByteOrder(QAudioFormat::LittleEndian);//   format.setSampleType(QAudioFormat::UnSignedInt);//   QAudioDeviceInfo info(QAudioDeviceInfo::defaultOutputDevice());//   if (!info.isFormatSupported(format)) {//    qWarning()<<"raw audio format not supported by backend, cannot play audio.";//    return;//   }//   audio_out = new QAudioOutput(format, this);//   connect(audio_out,SIGNAL(stateChanged(QAudio::State)),SLOT(finishedPlaying(QAudio::State)));//   audio_out->start(&inputFile);//   //audio_out->start(myBuffer);//   qDebug() <<"play begin!" << endl; }void MainWindow::finishedPlaying(QAudio::State state) {//   if(state == QAudio::IdleState) {//     audio_out->stop();//     inputFile.close();//     delete audio_out;//   }   qDebug() << "play end!" << endl; }

main.cpp

#include "mainwindow.h"#include <QApplication>int main(int argc, char *argv[]){    QApplication a(argc, argv);    MainWindow w;    w.show();    return a.exec();}