回答編集履歴
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追記
test
CHANGED
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@@ -27,3 +27,87 @@
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何が違うのかは前回説明したと思います。
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---
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適当に試してみましたが、440Hz付近になります。
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```c
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case MM_WIM_DATA: {
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bTmp = (int16_t*)realloc(bSave, dwLength + ((PWAVEHDR)lp)->dwBytesRecorded);
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if (blReset || !bTmp) {
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waveInClose(hWaveIn);
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blReset = FALSE;
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return 0;
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}
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bSave = bTmp;
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memcpy(bSave + dwLength/2, ((PWAVEHDR)lp)->lpData, ((PWAVEHDR)lp)->dwBytesRecorded);
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dwLength += ((PWAVEHDR)lp)->dwBytesRecorded;
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double* fftbuffer = (double*)malloc(sizeof(double) * ((LPWAVEHDR)lp)->dwBytesRecorded /2);
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const int NLEN = ((PWAVEHDR)lp)->dwBytesRecorded / 2;
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if( NLEN > 4096 ){
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for (dwCount = 0; dwCount < 4096; dwCount++)
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fftbuffer[dwCount] = ((int16_t*)((PWAVEHDR)lp)->lpData)[dwCount];
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fft1(fftbuffer, zeroData, 4096, 0, 0);
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int imax = 0; double max = fftbuffer[0]*fftbuffer[0] + zeroData[0] * zeroData[0];
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for (int i = 0; i < 4096; i++){
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if(fftbuffer[i]*fftbuffer[i] + zeroData[i]*zeroData[i] > max){
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imax = i;
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max = fftbuffer[i]*fftbuffer[i] + zeroData[i]*zeroData[i];
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}
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}
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cout << 48000.0 / 4096 * imax << max << endl;
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}
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waveInAddBuffer(hWaveIn, (PWAVEHDR)lp, sizeof(WAVEHDR));
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free(fftbuffer);
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return 0;
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}
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```
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