aplay播放声音

出处：https://www.jianshu.com/p/a96c15845ec9

 

#ifndef PLAYPCM_H
#define PLAYPCM_H

#include <QObject>
#include <QProcess>

class PlayPCM : public QObject
{
    Q_OBJECT
    QProcess process;

public:
    explicit PlayPCM(int sampleRate = 44100, int channels = 2, int sampleSize = 16, QObject *parent = nullptr);
    ~PlayPCM();
signals:

public slots:
    void writePCM(QByteArray array);
};

#endif // PLAYPCM_H

 

 

#include "playpcm.h"
#include <QDebug>
PlayPCM::PlayPCM(int sampleRate, int channels, int sampleSize, QObject *parent) : QObject(parent)
{
    char cmd[128];
    sprintf(cmd, "aplay -D hw:0,0 -r %d -c %d -f s%d", sampleRate, channels, sampleSize);
    process.start(cmd);
    if (process.waitForStarted()){
        //qDebug() << "PCM player is ready.";
    }
}

PlayPCM::~PlayPCM()
{
    process.kill();
}

void PlayPCM::writePCM(QByteArray array)
{
    if (process.isOpen())
        process.write(array);
}