front-end/build/ffmpeg/libavcodec/jpeg2000dec.c
/* Integer dequantization of a codeblock.*/
Integer dequantization of a codeblock.
Integer dequantization of a codeblock .
static void dequantization_int(int x, int y, Jpeg2000Cblk *cblk,
                               Jpeg2000Component *comp,
                               Jpeg2000T1Context *t1, Jpeg2000Band *band)
{
    int i, j;
    int w = cblk->coord[0][1] - cblk->coord[0][0];
    for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
        int32_t *datap = &comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * (y + j) + x];
        int *src = t1->data[j];
        for (i = 0; i < w; ++i)
            datap[i] = (src[i] * band->i_stepsize + (1 << 14)) >> 15;
    }
}
static void dequantization_int ( int x , int y , Jpeg2000Cblk * cblk , Jpeg2000Component * comp , Jpeg2000T1Context * t1 , Jpeg2000Band * band ) { int i , j ; int w = cblk -> coord [ 0 ] [ 1 ] - cblk -> coord [ 0 ] [ 0 ] ; for ( j = 0 ; j < ( cblk -> coord [ 1 ] [ 1 ] - cblk -> coord [ 1 ] [ 0 ] ) ; ++ j ) { int32_t * datap = & comp -> i_data [ ( comp -> coord [ 0 ] [ 1 ] - comp -> coord [ 0 ] [ 0 ] ) * ( y + j ) + x ] ; int * src = t1 -> data [ j ] ; for ( i = 0 ; i < w ; ++ i ) datap [ i ] = ( src [ i ] * band -> i_stepsize + ( 1 << 14 ) ) >> 15 ; } }
Integer dequantization of a codeblock.
Integer dequantization of a codeblock .