protected void GetAVInfo()
{
retro_system_av_info av = new retro_system_av_info();
_core.GetSystemAVInfo(ref av);
_videoInfo = new VideoInfo((int)av.geometry.base_width, (int)av.geometry.base_height, av.geometry.aspect_ratio);
_timingInfo = new TimingInfo(av.timing.fps, av.timing.sample_rate);
_audioOutput?.SetTimingInfo(av.timing);
_videoOutput?.SetGeometry(av.geometry);
}
