AntiAlias()

static void fl::third_party::AntiAlias ( int32_t * x, int32_t nBfly )

static

Definition at line 80 of file imdct.hpp.

{
    int32_t k;
    int32_t a0, b0, c0, c1;
    const int32_t *c;
 
    /* csa = Q31 */
    for (k = nBfly; k > 0; k--) {
        c = csa[0];
        x += 18;
 
        a0 = x[-1];            c0 = *c;    c++;    b0 = x[0];     c1 = *c;    c++;
        x[-1] = (MULSHIFT32(c0, a0) - MULSHIFT32(c1, b0)) * 2L;
        x[0] =  (MULSHIFT32(c0, b0) + MULSHIFT32(c1, a0)) * 2L;
 
        a0 = x[-2];            c0 = *c;    c++;    b0 = x[1];     c1 = *c;    c++;
        x[-2] = (MULSHIFT32(c0, a0) - MULSHIFT32(c1, b0)) * 2L;
        x[1] =  (MULSHIFT32(c0, b0) + MULSHIFT32(c1, a0)) * 2L;
 
        a0 = x[-3];            c0 = *c;    c++;    b0 = x[2];     c1 = *c;    c++;
        x[-3] = (MULSHIFT32(c0, a0) - MULSHIFT32(c1, b0)) * 2L;
        x[2] =  (MULSHIFT32(c0, b0) + MULSHIFT32(c1, a0)) * 2L;
 
        a0 = x[-4];            c0 = *c;    c++;    b0 = x[3];     c1 = *c;    c++;
        x[-4] = (MULSHIFT32(c0, a0) - MULSHIFT32(c1, b0)) * 2L;
        x[3] =  (MULSHIFT32(c0, b0) + MULSHIFT32(c1, a0)) * 2L;
 
        a0 = x[-5];            c0 = *c;    c++;    b0 = x[4];     c1 = *c;    c++;
        x[-5] = (MULSHIFT32(c0, a0) - MULSHIFT32(c1, b0)) * 2L;
        x[4] =  (MULSHIFT32(c0, b0) + MULSHIFT32(c1, a0)) * 2L;
 
        a0 = x[-6];            c0 = *c;    c++;    b0 = x[5];     c1 = *c;    c++;
        x[-6] = (MULSHIFT32(c0, a0) - MULSHIFT32(c1, b0)) * 2L;
        x[5] =  (MULSHIFT32(c0, b0) + MULSHIFT32(c1, a0)) * 2L;
 
        a0 = x[-7];            c0 = *c;    c++;    b0 = x[6];     c1 = *c;    c++;
        x[-7] = (MULSHIFT32(c0, a0) - MULSHIFT32(c1, b0)) * 2L;
        x[6] =  (MULSHIFT32(c0, b0) + MULSHIFT32(c1, a0)) * 2L;
 
        a0 = x[-8];            c0 = *c;    c++;    b0 = x[7];     c1 = *c;    c++;
        x[-8] = (MULSHIFT32(c0, a0) - MULSHIFT32(c1, b0)) * 2L;
        x[7] =  (MULSHIFT32(c0, b0) + MULSHIFT32(c1, a0)) * 2L;
    }
}

References csa, FL_NOEXCEPT, MULSHIFT32(), and fl::x.

Referenced by IMDCT().

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