用Qt实现录音以及放音.docx

用Qt实现录音以及放音环境：Ubuntu10.04,Qt Creator 2.0.1,Qt 4.7.0参考Qt帮助文档，对QAudioInput类以及QAudioOutput类进行操作，实现录音以及放音.工作流程：test_record_ver0工程录音3S，将声音文件保存在/root/qt_code/test.raw中,test_play_ver0工程打开test.raw文件，并输出声音. 源代码：test_record_ver0工程：widget.h:#ifndef WIDGET_H #define WIDGET_H #include #include #include #include using namespace std; namespace Ui class Widget; class Widget : public QWidget Q_OBJECT public: explicit Widget(QWidget *parent = 0); Widget(); private slots: void stopRecording(); private: Ui:Widget *ui; QFile outputFile; / class member. QAudioInput* audio; / class member. ; #endif / WIDGET_H widget.cpp:#include widget.h #include ui_widget.h Widget:Widget(QWidget *parent) : QWidget(parent), ui(new Ui:Widget) ui-setupUi(this); outputFile.setFileName(/root/qt_code/test.raw); outputFile.open( QIODevice:WriteOnly | QIODevice:Truncate ); QAudioFormat format; / set up the format you want, eg. format.setFrequency(8000); format.setChannels(1); format.setSampleSize(8); format.setCodec(audio/pcm); format.setByteOrder(QAudioFormat:LittleEndian); format.setSampleType(QAudioFormat:UnSignedInt); QAudioDeviceInfo info = QAudioDeviceInfo:defaultInputDevice(); if (!info.isFormatSupported(format) qWarning()start(&outputFile); / Records audio for 3000ms cout record begin! stop(); outputFile.close(); delete audio; cout record end! endl; Widget:Widget() delete ui; test_play_ver0工程：widget.h:#ifndef WIDGET_H #define WIDGET_H #include #include #include #include #include using namespace std; namespace Ui class Widget; class Widget : public QWidget Q_OBJECT public: explicit Widget(QWidget *parent = 0); Widget(); private slots: void finishedPlaying(QAudio:State state); private: Ui:Widget *ui; QFile inputFile; / class member. QAudioOutput* audio; / class member. ; #endif / WIDGET_H wideget.cpp:#include widget.h #include ui_widget.h Widget:Widget(QWidget *parent) : QWidget(parent), ui(new Ui:Widget) ui-setupUi(this); inputFile.setFileName(/root/qt_code/test.raw); /inputFile.setFileName(/root/share/wav.wav); inputFile.open(QIODevice:ReadOnly); QAudioFormat format; / Set up the format, eg. format.setFrequency(8000); format.setChannels(1); format.setSampleSize(8); format.setCodec(audio/pcm); format.setByteOrder(QAudioFormat:LittleEndian); format.setSampleType(QAudioFormat:UnSignedInt); QAudioDeviceInfo info(QAudioDeviceInfo:defaultOutputDevice(); if (!info.isFormatSupported(format) qWarning(