为什么录音机代码可以工作 8 位，但不能工作 16 位?

Question

我正在尝试在Windows上录制音频，这是我的代码。 它适用于 8 位，但不能适用于 16 位。谁能帮我？ #include #include #include #pragma comment（lib，"winmm.lib"） 使用命名空间标准;

int test(){
    HWAVEIN microHandle;
    WAVEHDR waveHeader;
    MMRESULT result = 0;
    WAVEFORMATEX waveformat;
    waveformat.wFormatTag = WAVE_FORMAT_PCM;
    waveformat.wBitsPerSample=8;
    waveformat.nSamplesPerSec=16000;//8000;
    waveformat.nAvgBytesPerSec=waveformat.nSamplesPerSec*waveformat.nSamplesPerSec/8;
    waveformat.nChannels=1;
    waveformat.nBlockAlign=waveformat.nChannels*waveformat.wBitsPerSample/8;
    waveformat.cbSize=0;
    result = waveInOpen(&microHandle, WAVE_MAPPER, &waveformat, 0L, 0L, CALLBACK_EVENT);
    if (result)
    {
        cout << "Fail step 1" << endl;
        cout << result << endl;
        Sleep(10000);
        return 0; 
    }
    const int BUFSIZE = 16000*4;
    char *  buf = (char *)malloc(BUFSIZE);
    // Set up and prepare header for input
    waveHeader.lpData = (LPSTR)buf;
    waveHeader.dwBufferLength = BUFSIZE;
    waveHeader.dwBytesRecorded=0;
    waveHeader.dwUser = 0L;
    waveHeader.dwFlags = 0L;
    waveHeader.dwLoops = 0L;
    waveInPrepareHeader(microHandle, &waveHeader, sizeof(WAVEHDR));
    // Insert a wave input buffer
    result = waveInAddBuffer(microHandle, &waveHeader, sizeof(WAVEHDR));
    if (result)
    {
        cout << "Fail step 2" << endl;
        cout << result << endl;
        Sleep(10000);
        return 0;
    }
    result = waveInStart(microHandle);
    if (result)
    {
        cout << "Fail step 3" << endl;
        cout << result << endl;
        Sleep(10000);
        return 0;
    }

    // Wait until finished recording
    do {} while (waveInUnprepareHeader(microHandle, &waveHeader, sizeof(WAVEHDR))==WAVERR_STILLPLAYING);
    FILE *fp = fopen("output.pcm","w");
    fwrite(buf,1,BUFSIZE,fp);
    fclose(fp);
    waveInClose(microHandle);
    return 0;
}
void main()
{
    test();
}

如果我设置参数波形.wBitsPerSample = 8，它可以正确录制音频，但是如果我将其设置为波形.wBitsPerSample = 16，它会记录噪声!!谁能帮我？

谢谢。

Answer 1

它应该 bu FILE *fp = fopen（"output.pcm"，"wb"）;NOT FILE *fp = fopen（"output.pcm"，"w"）;