self.chans = ainfo.get_channels() as usize;
self.ainfo = NAAudioInfo::new(ainfo.get_sample_rate(), ainfo.get_channels(), fmt, 0);
self.chmap = NAChannelMap::from_str(if ainfo.get_channels() == 2 {"L,R"} else {"C"}).unwrap();
self.chans = ainfo.get_channels() as usize;
self.ainfo = NAAudioInfo::new(ainfo.get_sample_rate(), ainfo.get_channels(), fmt, 0);
self.chmap = NAChannelMap::from_str(if ainfo.get_channels() == 2 {"L,R"} else {"C"}).unwrap();