Jpeg2000Component *comp,
Jpeg2000T1Context *t1, Jpeg2000Band *band)
{
- int i, j, idx;
- float *datap = &comp->f_data[(comp->coord[0][1] - comp->coord[0][0]) * y + x];
- for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j)
- for (i = 0; i < (cblk->coord[0][1] - cblk->coord[0][0]); ++i) {
- idx = (comp->coord[0][1] - comp->coord[0][0]) * j + i;
- datap[idx] = (float)(t1->data[j][i]) * band->f_stepsize;
- }
+ 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) {
+ float *datap = &comp->f_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->f_stepsize;
+ }
}
/* Integer dequantization of a codeblock.*/
Jpeg2000Component *comp,
Jpeg2000T1Context *t1, Jpeg2000Band *band)
{
- int i, j, idx;
- int32_t *datap = &comp->i_data[(comp->coord[0][1] - comp->coord[0][0]) * y + x];
- for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j)
- for (i = 0; i < (cblk->coord[0][1] - cblk->coord[0][0]); ++i) {
- idx = (comp->coord[0][1] - comp->coord[0][0]) * j + i;
- datap[idx] =
- ((int32_t)(t1->data[j][i]) * band->i_stepsize + (1 << 15)) >> 16;
- }
+ 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 << 15)) >> 16;
+ }
}
/* Inverse ICT parameters in float and integer.