获取WAV文件的相关信息

王朝vc·作者佚名 2006-01-09

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主要实现代码：

HMMIO m_hmmio;

MMCKINFO m_MMCkInfoParent;

WAVEFORMATEX m_PCMWaveFmtRecord;

MMCKINFO m_MMCkInfoChild;

TCHAR bigBuff[2048] = ""; // maximum common dialog buffer size

TCHAR szFilter[] =

"Text Files (*.wav)|*.wav|All Files (*.*)|*.*||";

//TCHAR csFileName[MAX_PATH];

//CString csFileName;

CString m_strFilePath;

CString strWaveInformation;

CString szExtFile;

CFileDialog dlg(TRUE, NULL, NULL,

OFN_HIDEREADONLY | OFN_ALLOWMULTISELECT, szFilter);

// Modify OPENFILENAME members directly to point to bigBuff

dlg.m_ofn.lpstrFile = bigBuff;

dlg.m_ofn.nMaxFile = sizeof(bigBuff);

if(dlg.DoModal() == IDOK)

{

m_strFilePath = dlg.GetPathName();

}

else

return;

m_hmmio = mmioOpen((LPSTR)(LPCTSTR)m_strFilePath,NULL,MMIO_READ);

if(!m_hmmio)

{

AfxMessageBox("unable to open Sound MM File");

return ;

}

m_MMCkInfoParent.fccType = mmioFOURCC('W','A','V','E');

int errorCode = mmioDescend(m_hmmio, &m_MMCkInfoParent,NULL,MMIO_FINDRIFF);

if(errorCode)

{

AfxMessageBox("Error descending into file");

mmioClose(m_hmmio,0);

m_hmmio = NULL;

return ;

}

m_MMCkInfoChild.ckid = mmioFOURCC('f','m','t',' ');

errorCode = mmioDescend(m_hmmio,&m_MMCkInfoChild,&m_MMCkInfoParent,MMIO_FINDCHUNK);

if(errorCode)

{

AfxMessageBox("Error descending in file");

mmioClose(m_hmmio,0);

m_hmmio = NULL;

return ;

}

DWORD bytesRead = mmioRead(m_hmmio,(LPSTR)&m_PCMWaveFmtRecord,m_MMCkInfoChild.cksize);

if(bytesRead < 0)

{

AfxMessageBox("Error reading PCM wave format record");

mmioClose(m_hmmio,0);

return ;

}

strWaveInformation.Format("wFormatTag = %d , nChannels = %d, nSamplesPerSec = %d, nAvgBytesPerSec = %d, nBlockAlign = %d, wBitsPerSample = %d, cbSize = %d",

m_PCMWaveFmtRecord.wFormatTag, m_PCMWaveFmtRecord.nChannels,

m_PCMWaveFmtRecord.nSamplesPerSec ,m_PCMWaveFmtRecord.nAvgBytesPerSec ,

m_PCMWaveFmtRecord.nBlockAlign, m_PCMWaveFmtRecord.wBitsPerSample,m_PCMWaveFmtRecord.cbSize);

AfxMessageBox(strWaveInformation);

mmioClose(m_hmmio,0);