请教：如何得到wav文件总的播放时间？

[kuhaha]

[jadeking]

//get temp1 file's total length
hr1 = AVIFileOpen(&pfileWave1, m_FileTemp1,0,0L);

if(hr1!=0)
AfxMessageBox("Failed to open AVI");

if (AVIFileGetStream(pfileWave1, &paviWave1, 0L, 0) != AVIERR_OK)
AfxMessageBox("Failed to get stream!");

timeStart1=AVIStreamStartTime(paviWave1);
timeEnd1=AVIStreamEndTime(paviWave1);
nTempTime1=(timeEnd1-timeStart1+1)/1000;

if(paviWave1)
AVIStreamClose(paviWave1);
if(pfileWave1)
AVIFileClose(pfileWave1);

AVIFileExit();

nTempTime1中是文件的总长，单位为秒