I'm sure what took so long is a combination of a) ridiculously poor/inconsistent camera API's b) less than satisfactory SIMD support. When I ported some camera

I'm sure what took so long is a combination of a) ridiculously poor/inconsistent camera API's b) less than satisfactory SIMD support. When I ported some camera stuff from IOS to Android it took me 3X as long due to the need to work around bugs in the SDK. I'm sure they had to do all sorts of nasty things with the JNI to get it performant as well, and I'm not even sure the JNI supports things like the C++ STL yet.