Function retro_get_system_av_info 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn retro_get_system_av_info(
    info: *mut retro_system_av_info,
)

Provides audio/video timings and geometry info to the frontend.

Guaranteed to be called only after successful invocation of retro_load_game.

See also rust_libretro_sys::retro_get_system_av_info.