各位大虾:如何才能生成一个正确的8000HZ,16位,单声道的WAVE文件?大大送分.

[lihhll]

各位大虾:我用下面的程序想生成一个8000HZ,16位,单声道的空的WAVE文件(58个字节),为什么不成功?请指教,还有那些参数要设置.
void CPcm::Createfile()
{

PCMWAVEFORMAT pcmWaveFormat;
MMCKINFO riffCK;
MMCKINFO childCK;
UINT cSample[4];
long wFlag=MMIO_CREATE|MMIO_WRITE|MMIO_EXCLUSIVE|MMIO_ALLOCBUF;
HMMIO hmmio=mmioOpen("temp.wav",NULL,wFlag);
riffCK.fccType =mmioStringToFOURCC("WAVE",MMIO_TOUPPER);
riffCK.cksize =0;
MMRESULT C= mmioCreateChunk (hmmio,&riffCK,MMIO_CREATERIFF);

LONG lFmtSize=(LONG)sizeof(pcmWaveFormat);
childCK.ckid =mmioStringToFOURCC ("fmt ",NULL);
childCK.cksize =lFmtSize;
MMRESULT N= mmioCreateChunk (hmmio,&childCK,NULL);

pcmWaveFormat.wf.wFormatTag = 1;
pcmWaveFormat.wf.nChannels=1;
pcmWaveFormat.wf.nSamplesPerSec=8000;
pcmWaveFormat.wf.nAvgBytesPerSec=8000;
pcmWaveFormat.wf.nBlockAlign=2;
pcmWaveFormat.wBitsPerSample=16;
LONGS=mmioWrite(hmmio,(LPTSTR)&pcmWaveFormat,
(LONG)sizeof(pcmWaveFormat));
MMRESULT D= mmioAscend(hmmio,&childCK,NULL);
childCK.ckid =mmioStringToFOURCC ("fact",NULL);
childCK.cksize =4;
MMRESULT M= mmioCreateChunk (hmmio,&childCK,NULL);
LONG K= mmioWrite(hmmio,(LPTSTR)&cSample,4);
MMRESULT B= mmioAscend(hmmio,&childCK,NULL);
childCK.ckid =mmioStringToFOURCC ("data",NULL);
childCK.cksize =0;
MMRESULT L= mmioCreateChunk (hmmio,&childCK,NULL);

LONG P= mmioWrite(hmmio,NULL,0);

MMRESULT O= mmioAscend(hmmio,&childCK,0);
MMRESULT PS= mmioAscend(hmmio,&riffCK,0);
MMRESULT R= mmioFlush(hmmio,MMIO_EMPTYBUF);
mmioClose(hmmio,0);


}
用Createfile（）生成的WAVE文件的格式为：
52 49 46 46 30 00 00 00 57 41 56 45 66 6D 74 20
10 00 00 00 01 00 01 00 40 1F 00 00 40 1F 00 00
02 00 10 00 66 61 63 74 04 00 00 00 CC CC CC CC
64 61 74 61 00 00 00 00

正常的8000HZ，16位 单声道 的WAVE文件的格式为：

52 49 46 46 32 00 00 00 57 41 56 45 66 6D 74 20
12 00 00 00 01 00 01 00 40 1F 00 00 80 3E 00 00
02 00 10 00 00 00 66 61 63 74 04 00 00 00 00 00
00 00 64 61 74 61 00 00 00 00

请问如何才能生成这种8000HZ，16位 单声道的空的WAVE文件

[yinx]

有8000Hz的wav文件吗，要那么大的采样频率干什么？

[lihhll]

楼上：我要做一个wave文件，把这个WAVE文件通过MODEM和电话传出去，而通过MODEM和电话线传的WAVE文件的格式为8000HZ，16位 单声道 的WAVE文件。

[yinx]

http://gzzj.com/sender/index.html 上有一个wavecn1.3可以转换 ，你可以向作者索要源代码，

[yinx]

8000Hz 16位 单声道，不就是pcm一次群的信号吗？不好意思原来把采样频率看错了，看成80000Hz了

[cloudfog]

nAvgBytesPerSec
Required average data-transfer rate, in bytes per second, for the format tag. If wFormatTag is WAVE_FORMAT_PCM, nAvgBytesPerSec should be equal to the product of nSamplesPerSec and nBlockAlign. For non-PCM formats, this member must be computed according to the manufacturer's specification of the format tag.
这是platform sdk上的原文，你程序中设的不对，应该为16000

[yinx]

wavecn1.3我试过了，好像有bug