获取WAV文件的相关信息

来源：互联网发布：php获取当前时间编辑：程序博客网时间：2024/05/17 12:21

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);