add a raw midi buffer plugin example

diff --git a/scripts/rawmidi.lua b/scripts/rawmidi.lua
new file mode 100644 (file)
index 0000000..73e62ef
--- /dev/null
+++ b/scripts/rawmidi.lua
@@ -0,0 +1,33 @@
+ardour {
+       ["type"]    = "dsp",
+       name        = "Midi Passthru",
+       category    = "Example",
+       license     = "MIT",
+       author      = "Robin Gareus",
+       email       = "robin@gareus.org",
+       site        = "http://gareus.org",
+       description = [[An Example Midi Passthrough Plugin using raw buffers.]]
+}
+
+function dsp_ioconfig ()
+       return { { audio_in = 0, audio_out = 0}, }
+end
+
+function dsp_has_midi_input () return true end
+function dsp_has_midi_output () return true end
+
+function dsp_runmap (bufs, in_map, out_map, n_samples, offset)
+       local ib = in_map:get(ARDOUR.DataType("midi"), 0); -- get id of input buffer
+       local ob = in_map:get(ARDOUR.DataType("midi"), 0); -- get id of output buffer
+       assert (ib ~= ARDOUR.ChanMapping.Invalid);
+       assert (ib == ob);  -- inplace, buffers are identical
+
+       local mb = bufs:get_midi (ib)
+       events = mb:table() -- copy event list into lua table
+
+       for _,e in pairs (events) do
+               -- e is an http://ardourman/lua-scripting/class_reference/#Evoral:MidiEvent
+               --
+               --print (e:channel())
+       end
+end