They're probably not warping but the only way to know for sure is to measure them off the axle.
You probably have uneven pad deposition although a bunch of things can cause brake vibration and they're all well covered here.
Brake judder is usually self inflicted, almost always caused by the way you brake.
Do a google search for "brakes don't warp" for the easy and free fix.
It has been discussed many times here so it's well covered how to fix it and to prevent it in the future.