Qt录音，指定采样率，录音到内存

#include "widget.h" #include <QApplication> #include <QHBoxLayout> #include <QDebug> struct WAVHEADER { // RIFF 头 char RiffName[4]; unsigned long nRiffLength; // 数据类型标识符 char WavName[4]; // 格式块中的块头 char FmtName[4]; unsigned long nFmtLength; // 格式块中的块数据 unsigned short nAudioFormat; unsigned short nChannleNumber; unsigned long nSampleRate; unsigned long nBytesPerSecond; unsigned short nBytesPerSample; unsigned short nBitsPerSample; // 数据块中的块头 char DATANAME[4]; unsigned long nDataLength; }; Widget::Widget(QWidget *parent) : QWidget(parent) { _startBtn = new QPushButton(QStringLiteral("开始录音"),this); _endBtn = new QPushButton(QStringLiteral("结束录音"),this); QHBoxLayout *_hBoxLayout = new QHBoxLayout(this); _hBoxLayout->addWidget(_startBtn); _hBoxLayout->addWidget(_endBtn); QAudioFormat audioFormat; audioFormat.setByteOrder(QAudioFormat::LittleEndian); audioFormat.setChannelCount(1); audioFormat.setCodec("audio/pcm"); audioFormat.setSampleRate(16000); audioFormat.setSampleSize(16); audioFormat.setSampleType(QAudioFormat::SignedInt); QAudioDeviceInfo devInfo = QAudioDeviceInfo::defaultInputDevice(); if(devInfo.isNull()){ qDebug() << "未找到录音设备"; } if(!devInfo.isFormatSupported(audioFormat)){ //当前使用设备是否支持 audioFormat = devInfo.nearestFormat(audioFormat); //转换为最接近格式 } _audioInput = new QAudioInput(devInfo,audioFormat,this); bufDevice.setBuffer(&voiceData); connect(_startBtn,&QPushButton::clicked,[&]()->void{ #ifdef TOFILE outFile.setFileName(qApp->applicationDirPath() + "/test.wav"); //语音原始文件 outFile.open(QIODevice::ReadWrite | QIODevice::Truncate); _audioInput->start(&outFile); #else bufDevice.open(QIODevice::ReadWrite | QIODevice::Truncate); _audioInput->start(&bufDevice); #endif }); connect(_endBtn,&QPushButton::clicked,[&]()->void{ QIODevice *device{nullptr}; #ifdef TOFILE device = &outFile; #else device = &bufDevice; #endif static WAVHEADER wavHeader; qstrcpy(wavHeader.RiffName,"RIFF"); qstrcpy(wavHeader.WavName,"WAVE"); qstrcpy(wavHeader.FmtName,"fmt "); qstrcpy(wavHeader.DATANAME,"data"); wavHeader.nFmtLength = 16; int nAudioFormat = 1; wavHeader.nAudioFormat = nAudioFormat; wavHeader.nBitsPerSample = 16; wavHeader.nChannleNumber = 1; wavHeader.nSampleRate = 16000; wavHeader.nBytesPerSample = wavHeader.nChannleNumber * wavHeader.nBitsPerSample / 8; wavHeader.nBytesPerSecond = wavHeader.nSampleRate * wavHeader.nChannleNumber * wavHeader.nBitsPerSample / 8; wavHeader.nRiffLength = device->size() - 8 + sizeof(WAVHEADER); wavHeader.nDataLength = device->size(); device->seek(0); device->write(reinterpret_cast<char*>(&wavHeader),sizeof WAVHEADER); }); } Widget::~Widget() { #ifdef TOFILE outFile.close(); #else bufDevice.close(); #endif }