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 3000msqDebug() <<"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();}
，你写PPT时，阿拉斯加的鳕鱼正跃出水面，
