-instance Frame fr ⇒ Mux L.Vector fr Stereo where
- type DemuxedVec L.Vector fr Stereo = (L.Vector fr, L.Vector fr)
- mux (left, right) = loop left right
- where
- -- THINKME: consider using storablevector-streamfusion
- loop l r
- = let Just (lFr, l') = L.viewL l
- Just (rFr, r') = L.viewL r
- lr' = loop l' r'
- in
- L.cons lFr (L.cons rFr lr')
+{-# INLINE interleave #-}
+interleave ∷ Storable α ⇒ L.Vector α → L.Vector α → L.Vector α
+interleave l r
+ -- THINKME: consider using storablevector-streamfusion
+ = let Just (lFr, l') = L.viewL l
+ Just (rFr, r') = L.viewL r
+ lr' = interleave l' r'
+ in
+ L.cons lFr (L.cons rFr lr')
+
+{-# INLINE deinterleave #-}
+deinterleave ∷ Storable α ⇒ L.Vector α → (L.Vector α, L.Vector α)
+deinterleave v
+ -- THINKME: consider using storablevector-streamfusion
+ = let (lr, v') = L.splitAt 2 v
+ in
+ if L.null lr then
+ (L.empty, L.empty)
+ else
+ let Just (lFr, r) = L.viewL lr
+ Just (rFr, _) = L.viewL r
+ (l', r') = deinterleave v'
+ in
+ (L.cons lFr l', L.cons rFr r')