const int cmk_linesize = fm->cmask_linesize[0] << 1;
const int cmk_linesizeUV = fm->cmask_linesize[2];
uint8_t *cmkpp = cmkp - (cmk_linesize>>1);
const int cmk_linesize = fm->cmask_linesize[0] << 1;
const int cmk_linesizeUV = fm->cmask_linesize[2];
uint8_t *cmkpp = cmkp - (cmk_linesize>>1);