PCM
手头没有pcm音频可以使用ffmpeg将mp4切出pcm。
ffmpeg -i xxx.mp4 -f s161e xxx.pcm
播放
#include <QAudioFormat>
#include <QThread>
#include <QAudioOutput>
void Pcm(const QString &str)
{
QAudioFormat fmt;
fmt.setSampleRate(44100);
fmt.setSampleSize(16);
fmt.setChannelCount(2);
fmt.setCodec("audio/pcm");
fmt.setByteOrder(QAudioFormat::LittleEndian);
fmt.setSampleType(QAudioFormat::UnSignedInt);
QAudioOutput *out = new QAudioOutput(fmt);
QIODevice *io = out->start(); //开始播放
int size = out->periodSize();
char *buf = new char[size];
FILE *fp = fopen(str.toStdString().c_str(), "rb");
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;
}
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笔者 - jxd