Android NV12ToARGB LibYUV?

Question

I want to convert byte[] NV12 format to ARGB. In LibYUV, I found that:

 LIBYUV_API
int NV12ToARGB(const uint8* src_y, int src_stride_y,
               const uint8* src_uv, int src_stride_uv,
               uint8* dst_argb, int dst_stride_argb,
               int width, int height);

How can I get these params from NV12 data? Anyone can help me? Thanks!