bytestream2_skip(&a->buffer, 4);
bytestream2_get_buffer(&a->buffer, ctable, 128);
bytestream2_skip(&a->buffer, 1);
delta = bytestream2_get_byte(&a->buffer);
if(delta == 0x10) {
bytestream2_skip(&a->buffer, 4);
bytestream2_get_buffer(&a->buffer, ctable, 128);
bytestream2_skip(&a->buffer, 1);
delta = bytestream2_get_byte(&a->buffer);
if(delta == 0x10) {