Function initMpsFFTData

libjamesdsp/JdspImpResToolbox.c:31–44

    free(fd->mSineTab);
}
void initMpsFFTData(fftData *fd, unsigned int xLen, float threshdB)
{
    fd->xLen = xLen;
    fd->fftLen = upper_power_of_two(xLen);
    fd->halfLen = fd->fftLen >> 1;
    fd->halfLenWdc = fd->halfLen + 1;
    fd->mBitRev = (unsigned int*)malloc(fd->fftLen * sizeof(unsigned int));
    fd->mSineTab = (float*)malloc(fd->fftLen * sizeof(float));
    LLbitReversalTbl(fd->mBitRev, fd->fftLen);
    LLsinHalfTblFloat(fd->mSineTab, fd->fftLen);
    fd->threshold = powf(10.0f, threshdB / 20.0f);
    fd->logThreshold = logf(fd->threshold);
    fd->normalizeGain = 1.0f / fd->fftLen;
}
void mps(fftData *fd, float *x, float *y)
{
    unsigned int i;