src/main/java/org/jcodec/codecs/mpa/Mp3Mdct.java
private static void imdct12(float[] src, float[] dst, int outOff, int wndIdx) {

        for (int j = 15 + wndIdx, k = 12 + wndIdx; j >= 3 + wndIdx; j -= 3, k -= 3)
            src[j] += src[k];

        src[15 + wndIdx] += src[9 + wndIdx];
        src[9 + wndIdx] += src[3 + wndIdx];

        float pp2 = src[12 + wndIdx] * cos600;
        float pp1 = src[6 + wndIdx] * cos300;
        float sum = src[0 + wndIdx] + pp2;
        tmp[1] = src[wndIdx] - src[12 + wndIdx];
        tmp[0] = sum + pp1;
        tmp[2] = sum - pp1;

        pp2 = src[15 + wndIdx] * cos600;
        pp1 = src[9 + wndIdx] * cos300;
        sum = src[3 + wndIdx] + pp2;
        tmp[4] = src[3 + wndIdx] - src[15 + wndIdx];
        tmp[5] = sum + pp1;
        tmp[3] = sum - pp1;

        tmp[3] *= factor12pt0;
        tmp[4] *= cos450;
        tmp[5] *= factor12pt1;

        float t  = tmp[0];
        tmp[0]  += tmp[5];
        tmp[5]   = t - tmp[5];
        
        t        = tmp[1];
        tmp[1]  += tmp[4];
        tmp[4]   = t - tmp[4];
        
        t        = tmp[2];
        tmp[2]  += tmp[3];
        tmp[3]   = t - tmp[3];

        for (int j = 0; j < 6; j++)
            tmp[j] *= factor12[j];

        tmp[8]  = -tmp[0] * cos375;
        tmp[9]  = -tmp[0] * cos525;
        tmp[7]  = -tmp[1] * cos225;
        tmp[10] = -tmp[1] * cos675;
        tmp[6]  = -tmp[2] * cos075;
        tmp[11] = -tmp[2] * cos825;

        tmp[0]  = tmp[3];
        tmp[1]  = tmp[4]  * cos675;
        tmp[2]  = tmp[5]  * cos525;

        tmp[3]  = -tmp[5] * cos375;
        tmp[4]  = -tmp[4] * cos225;
        tmp[5]  = -tmp[0] * cos075;

        tmp[0] *= cos825;

        for (int i = 0, j = outOff + 6; i < 12; i++, j++) {
            dst[j] += tmp[i];
        }
    }
private static void imdct12(float[] src, float[] dst, int outOff, int wndIdx) {

        for (int j = 15 + wndIdx, k = 12 + wndIdx; j >= 3 + wndIdx; j -= 3, k -= 3)
            src[j] += src[k];

        src[15 + wndIdx] += src[9 + wndIdx];
        src[9 + wndIdx] += src[3 + wndIdx];

        float pp2 = src[12 + wndIdx] * cos600;
        float pp1 = src[6 + wndIdx] * cos300;
        float sum = src[0 + wndIdx] + pp2;
        tmp[1] = src[wndIdx] - src[12 + wndIdx];
        tmp[0] = sum + pp1;
        tmp[2] = sum - pp1;

        pp2 = src[15 + wndIdx] * cos600;
        pp1 = src[9 + wndIdx] * cos300;
        sum = src[3 + wndIdx] + pp2;
        tmp[4] = src[3 + wndIdx] - src[15 + wndIdx];
        tmp[5] = sum + pp1;
        tmp[3] = sum - pp1;

        tmp[3] *= factor12pt0;
        tmp[4] *= cos450;
        tmp[5] *= factor12pt1;

        float t  = tmp[0];
        tmp[0]  += tmp[5];
        tmp[5]   = t - tmp[5];
        
        t        = tmp[1];
        tmp[1]  += tmp[4];
        tmp[4]   = t - tmp[4];
        
        t        = tmp[2];
        tmp[2]  += tmp[3];
        tmp[3]   = t - tmp[3];

        for (int j = 0; j < 6; j++)
            tmp[j] *= factor12[j];

        tmp[8]  = -tmp[0] * cos375;
        tmp[9]  = -tmp[0] * cos525;
        tmp[7]  = -tmp[1] * cos225;
        tmp[10] = -tmp[1] * cos675;
        tmp[6]  = -tmp[2] * cos075;
        tmp[11] = -tmp[2] * cos825;

        tmp[0]  = tmp[3];
        tmp[1]  = tmp[4]  * cos675;
        tmp[2]  = tmp[5]  * cos525;

        tmp[3]  = -tmp[5] * cos375;
        tmp[4]  = -tmp[4] * cos225;
        tmp[5]  = -tmp[0] * cos075;

        tmp[0] *= cos825;

        for (int i = 0, j = outOff + 6; i < 12; i++, j++) {
            dst[j] += tmp[i];
        }
    }
private static void imdct12 ( float [ ] src , float [ ] dst , int outOff , int wndIdx ) { for ( int j = 15 + wndIdx , k = 12 + wndIdx ; j >= 3 + wndIdx ; j -= 3 , k -= 3 ) src [ j ] += src [ k ] ; src [ 15 + wndIdx ] += src [ 9 + wndIdx ] ; src [ 9 + wndIdx ] += src [ 3 + wndIdx ] ; float pp2 = src [ 12 + wndIdx ] * cos600 ; float pp1 = src [ 6 + wndIdx ] * cos300 ; float sum = src [ 0 + wndIdx ] + pp2 ; tmp [ 1 ] = src [ wndIdx ] - src [ 12 + wndIdx ] ; tmp [ 0 ] = sum + pp1 ; tmp [ 2 ] = sum - pp1 ; pp2 = src [ 15 + wndIdx ] * cos600 ; pp1 = src [ 9 + wndIdx ] * cos300 ; sum = src [ 3 + wndIdx ] + pp2 ; tmp [ 4 ] = src [ 3 + wndIdx ] - src [ 15 + wndIdx ] ; tmp [ 5 ] = sum + pp1 ; tmp [ 3 ] = sum - pp1 ; tmp [ 3 ] *= factor12pt0 ; tmp [ 4 ] *= cos450 ; tmp [ 5 ] *= factor12pt1 ; float t = tmp [ 0 ] ; tmp [ 0 ] += tmp [ 5 ] ; tmp [ 5 ] = t - tmp [ 5 ] ; t = tmp [ 1 ] ; tmp [ 1 ] += tmp [ 4 ] ; tmp [ 4 ] = t - tmp [ 4 ] ; t = tmp [ 2 ] ; tmp [ 2 ] += tmp [ 3 ] ; tmp [ 3 ] = t - tmp [ 3 ] ; for ( int j = 0 ; j < 6 ; j ++ ) tmp [ j ] *= factor12 [ j ] ; tmp [ 8 ] = - tmp [ 0 ] * cos375 ; tmp [ 9 ] = - tmp [ 0 ] * cos525 ; tmp [ 7 ] = - tmp [ 1 ] * cos225 ; tmp [ 10 ] = - tmp [ 1 ] * cos675 ; tmp [ 6 ] = - tmp [ 2 ] * cos075 ; tmp [ 11 ] = - tmp [ 2 ] * cos825 ; tmp [ 0 ] = tmp [ 3 ] ; tmp [ 1 ] = tmp [ 4 ] * cos675 ; tmp [ 2 ] = tmp [ 5 ] * cos525 ; tmp [ 3 ] = - tmp [ 5 ] * cos375 ; tmp [ 4 ] = - tmp [ 4 ] * cos225 ; tmp [ 5 ] = - tmp [ 0 ] * cos075 ; tmp [ 0 ] *= cos825 ; for ( int i = 0 , j = outOff + 6 ; i < 12 ; i ++ , j ++ ) { dst [ j ] += tmp [ i ] ; } }
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Wrong usage of Javascript keyword : in