if (get_bits1(gb)) {
for (i = 0; i <= s->wavelet_depth; i++) {
CHECKEDREAD(s->codeblock[i].width , tmp < 1, "codeblock width invalid\n")
if (get_bits1(gb)) {
for (i = 0; i <= s->wavelet_depth; i++) {
CHECKEDREAD(s->codeblock[i].width , tmp < 1, "codeblock width invalid\n")