pcm数据生成wav文件

Qt由pcm数据生成wav文件

void AudioGrabber::saveWave(const QString &fileName, const QByteArray &raw, const QAudioFormat &format)
{
typedef struct{
char riff_fileid[4];//"RIFF"
DWORD riff_fileLen;
char waveid[4];//"WAVE"

char fmt_chkid[4];//"fmt"
DWORD fmt_chkLen;

WORD wFormatTag; /* format type */
WORD nChannels; /* number of channels (i.e. mono, stereo, etc.) */
DWORD nSamplesPerSec; /* sample rate */
DWORD nAvgBytesPerSec; /* for buffer estimation */
WORD nBlockAlign; /* block size of data */
WORD wBitsPerSample;

char data_chkid[4];//"DATA"
WORD data_chkLen;
}WaveHeader;

WaveHeader wh={0};
strcpy(wh.riff_fileid, "RIFF");
wh.riff_fileLen = raw.length() + 32;
strcpy(wh.waveid, "WAVE");

strcpy(wh.fmt_chkid, "fmt ");
wh.fmt_chkLen = 16;

wh.wFormatTag = WAVE_FORMAT_PCM;
wh.nChannels = format.channels();
wh.nSamplesPerSec = format.frequency();
wh.wBitsPerSample = format.sampleSize();
wh.nBlockAlign =wh.nChannels*wh.wBitsPerSample/8;
wh.nAvgBytesPerSec = wh.nBlockAlign*wh.nSamplesPerSec;

strcpy(wh.data_chkid, "data");
wh.data_chkLen = raw.length();

QFile f(fileName);
f.open(QFile::WriteOnly);
f.write((char *)&wh, sizeof(wh));
f.write(raw);
f.close();
}