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Calculating the Duration of a WAV Sound
The length of time for which a waveform will play is determined by the data size and the format.
The following example function returns the duration of a WAV file, in milliseconds:
DWORD GetSoundLength(LPSTR strFileName)
{
CWaveFile* pWav;
DWORD dwLen = 0;
DWORD dwSize;
WAVEFORMATEX* wfx;
pWav = new CWaveFile();
if (SUCCEEDED(pWav->Open(strFileName, NULL, WAVEFILE_READ)))
{
wfx = pWav->GetFormat();
dwSize = pWav->GetSize();
dwLen = (DWORD) (1000 * dwSize / wfx->nAvgBytesPerSec);
pWav->Close();
}
if (pWav) delete pWav;
return dwLen;
}
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