From 43872dc6b365bbcc91d47d85c780b357a78b98c8 Mon Sep 17 00:00:00 2001
From: alex <alex@slab.org>
Date: Thu, 21 Jan 2021 21:24:37 +0000
Subject: [PATCH] panbus seems to work now ref #762

---
 src/Sound/Tidal/Params.hs | 5 +++++
 src/Sound/Tidal/Stream.hs | 8 ++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/Sound/Tidal/Params.hs b/src/Sound/Tidal/Params.hs
index 1b0b566ef..47b0952e2 100644
--- a/src/Sound/Tidal/Params.hs
+++ b/src/Sound/Tidal/Params.hs
@@ -21,6 +21,7 @@ module Sound.Tidal.Params where
 import qualified Data.Map.Strict as Map
 
 import Sound.Tidal.Pattern
+import Sound.Tidal.Core ((#))
 import Sound.Tidal.Utils
 import Data.Maybe (fromMaybe)
 import Data.Word (Word8)
@@ -330,6 +331,10 @@ overshape = pF "overshape"
 -- | a pattern of numbers between 0 and 1, from left to right (assuming stereo), once round a circle (assuming multichannel)
 pan :: Pattern Double -> ControlPattern
 pan = pF "pan"
+
+panbus :: Pattern Int -> Pattern Double -> ControlPattern
+panbus busid pat = (pF "pan" pat) # (pI "^pan" busid)
+
 -- | a pattern of numbers between -inf and inf, which controls how much multichannel output is fanned out (negative is backwards ordering)
 panspan :: Pattern Double -> ControlPattern
 panspan = pF "span"
diff --git a/src/Sound/Tidal/Stream.hs b/src/Sound/Tidal/Stream.hs
index c0cc97705..eb3f4acfe 100644
--- a/src/Sound/Tidal/Stream.hs
+++ b/src/Sound/Tidal/Stream.hs
@@ -306,10 +306,11 @@ playStack pMap = stack $ map pattern active
 toOSC :: Double -> [Int] -> Event ControlMap -> T.Tempo -> OSC -> [(Double, Bool, O.Message)]
 toOSC latency busses e tempo osc@(OSC _ _)
   = catMaybes (playmsg:busmsgs)
-       where (busmap, playmap) = Map.partitionWithKey (\k _ -> null k || head k /= '^') $ value e
+       where (playmap, busmap) = Map.partitionWithKey (\k _ -> null k || head k /= '^') $ value e
              -- swap in bus ids where needed
              playmap' = Map.union (Map.mapKeys tail $ Map.map (\(VI i) -> VS ('c':(show i))) busmap) playmap
-             playmsg | eventHasOnset e = do vs <- toData osc addExtra
+             addExtra = Map.union playmap' extra
+             playmsg | eventHasOnset e = do vs <- toData osc (e {value = addExtra})
                                             mungedPath <- substitutePath (path osc) playmap'
                                             return (ts,
                                                     False, -- bus message ?
@@ -331,12 +332,11 @@ toOSC latency busses e tempo osc@(OSC _ _)
              off = sched tempo $ stop $ wholeOrPart e
              delta = off - on
              -- If there is already cps in the event, the union will preserve that.
-             addExtra = (\v -> (Map.union v extra)) <$> e
              extra = Map.fromList [("cps", (VF (T.cps tempo))),
                                    ("delta", VF delta),
                                    ("cycle", VF (fromRational $ start $ wholeOrPart e)) 
                                  ]
-             nudge = fromJust $ getF $ fromMaybe (VF 0) $ Map.lookup "nudge" $ value e
+             nudge = fromJust $ getF $ fromMaybe (VF 0) $ Map.lookup "nudge" $ playmap
              ts = on + nudge + latency
              tsPart = onPart + nudge + latency