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();
}