# Is this a known function ?

Hello,
while attempting to solve a problem, I came up with the following integral:

$$\int_0^{2\pi}e^{i\left( u\cos(x)+v\sin(x) \right)}dx$$

where u,v are two real constants.
I don't know how to solve this definite integral and I am wondering if this formula is already known, and if it pops up in other contexts.

Thanks.