Cannot read midi messages

[rmt]

The wrapper.getMessage API isn't called correctly, as the size of the buffer must be passed in. If this isn't done, the buffer isn't modified.
Here is how I patched it:

diff --git a/rtmidi.nim b/rtmidi.nim
index 16d4eb8..542ff10 100644
--- a/rtmidi.nim
+++ b/rtmidi.nim
@@ -99,10 +99,11 @@ proc ignoreTypes*(m: MidiIn, midiSysEx: bool = true, midiTime: bool = true,
   wrapper.ignoreTypes(m, midiSysEx, midiTime, midiSense)
 
 proc getNextMessage*(m: MidiIn,
-                     buffer: var openArray[byte]): tuple[length: Natural,
-                                                         eventDelta: float] =
+                     buffer: var openArray[byte],
+                     blen: csize): tuple[length: Natural,
+                                         eventDelta: float] =
   withHandleError(m):
-    var length: csize
+    var length: csize = blen
     var eventDelta = wrapper.getMessage(m, buffer[0].addr, length.addr)
     result = (length.Natural, eventDelta)

[johnnovak]

Hi, thanks, could you raise a PR? I haven't been actively using the wrapper for at least 2 years now 😄