QAudio

.pro文件添加 QT+=multimedia

#include <QtCore/QCoreApplication>
#include <QAudioFormat>
#include <QAudioOutput>
#include <QThread>
//如何准备pcm数据
//ffmpeg -i 15.mp4 -f s16le out.pcm
 
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    //设置采样格式
    QAudioFormat fmt;
    fmt.setSampleRate(44100);   //设置采样率
    fmt.setChannelCount(2);     //设置通道数
    fmt.setSampleSize(16);      //设置采样大小
    fmt.setCodec("audio/pcm");  //设置编码方式
    fmt.setByteOrder(QAudioFormat::LittleEndian); //设置字节序
    fmt.setSampleType(QAudioFormat::UnSignedInt); //设置样本数据类型
    QAudioOutput *out = new QAudioOutput(fmt);
    QIODevice *io = out->start();  //开始播放
 
    //可运行的大小
    int size = out->periodSize();
    char *buf = new char[size];
 
    FILE *fp = fopen("out.pcm", "rb");
    if(!fp)
    {
      printf("file is null!\r\n");
    }
    while (!feof(fp))
    {
        if (out->bytesFree()<size)
        {
            QThread::msleep(1);
            continue;
        }
        int len = fread(buf,1,size,fp);
        if (len<=0)
        {
            break;
        }
        io->write(buf,len);
    }
    fclose(fp);
    delete buf;
    buf = 0;
    return a.exec();
}