Qt synchronized recording playback under Windows

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Qt synchronized recording playback under Windows

this blog link: http://blog.csdn.net/jdh99 , Author: jdh, reprint please specify.

Environment:

Host: WIN8

Development environment: QT5 3.1.2

Description

Do a QQ-like voice transmission software, so test how to use QT for voice synchronization playback under Windows

Source:

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 ();p rivate slots:    void stoprecording ();    void Finishedplaying (qaudio::state state);    void Readmore ();p rivate:    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::d efaultinputdevice ();       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 (, 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.setchannelcou NT (1);//Format.setsamplesize (+)//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); C7/>mainwindow W;    W.show ();    return a.exec ();}

Qt synchronized recording playback under Windows