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| author | Julien "_FrnchFrgg_" RIVAUD <frnchfrgg@free.fr> | 2017-07-14 15:16:33 +0200 |
|---|---|---|
| committer | Julien "_FrnchFrgg_" RIVAUD <frnchfrgg@free.fr> | 2017-07-14 15:16:33 +0200 |
| commit | 3b1a6a350e1377e56be0725bb2a9819d992e426c (patch) | |
| tree | 19ae58ce217744f3c3d3a5540f005b3b30ae53e0 /scripts | |
| parent | 812cbdaca9c8ced687e4dba11fb399535c96a5eb (diff) | |
Simplify _midifilter.lua example
Instead of and-ing the first byte to extract the event type, it is
simpler and easier to understand to bitwise-shift it, so that we don't
get the result as a multiple of 2^4, but as values corresponding to the
MIDI specification.
Currently, a guard is put against events with completely empty data,
though maybe ardour discards those earlier on since that would not be
valid MIDI.
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/_midifilter.lua | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/scripts/_midifilter.lua b/scripts/_midifilter.lua index 3ff61d3888..d6a1c1f567 100644 --- a/scripts/_midifilter.lua +++ b/scripts/_midifilter.lua @@ -27,11 +27,12 @@ function dsp_run (_, _, n_samples) for _,b in pairs (midiin) do local t = b["time"] -- t = [ 1 .. n_samples ] local d = b["data"] -- get midi-event + local event_type + if #d == 0 then event_type = -1 else event_type = d[1] >> 4 end - if (#d == 3 and bit32.band (d[1], 240) == 144) then -- note on + if (#d == 3 and event_type == 9) then -- note on tx_midi (t, d) - end - if (#d == 3 and bit32.band (d[1], 240) == 128) then -- note off + elseif (#d == 3 and event_type = 8) then -- note off tx_midi (t, d) end end |