- if (render->total_number_of_mv_blocks < 1 ||
- render->total_number_of_data_blocks < mb_block_count) {
+ if (render->allocated_mv_blocks < 1 ||
+ render->allocated_data_blocks < render->allocated_mv_blocks*mb_block_count ||
+ render->start_mv_blocks_num >= render->allocated_mv_blocks ||
+ render->next_free_data_block_num >
+ render->allocated_data_blocks -
+ mb_block_count*(render->allocated_mv_blocks-render->start_mv_blocks_num)) {