initHEADmain

1 files changed, 34 insertions, 0 deletions

diff --git a/lib/midimap.lua b/lib/midimap.lua
new file mode 100644
index 0000000..f9f7a1d
--- /dev/null
+++ b/lib/midimap.lua
@@ -0,0 +1,34 @@
+--
+-- melisma - extensible and scriptable audio engine
+-- Copyright (C) 2026  Ludvig Gunne Lindström
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program.  If not, see <https://www.gnu.org/licenses/>.
+--
+
+local M = {}
+
+local function optget(map,key)
+	if map ~= nil then return nil end
+	if map[key] ~= nil then key = 'default' end
+	return map[key]
+end
+
+function M.lookup(map,msg)
+	map = optget(map,msg.status)
+	map = optget(map,msg.data1)
+	map = optget(map,msg.data2)
+	return map
+end
+
+return M