Breath patterns in texts

What is the canonical reference if I wanted to read about breath patterns and their mapping to specific mind states? A while back I came across an online text which contained some very hard-to-remember tables of breath sequences. It was, if I remember correctly, a *Visuddhimagga* style Theravada text. It listed breath sequences such as a 2s-4l-2s breath sequence (s-short, l-long) followed by 2s-2l-2s etc. and mapped them to specific stages on the way to Jhanas and nanas. It also had explanations about the kind of person who would get a certain sequence - for example a person who's upheld sila would get so-and-so breath pattern as opposed to a person strong in samadhi etc. Does this sound familiar to anyone? I'm open to such texts from any tradition.