diff options
Diffstat (limited to 'scripts/amp2.lua')
| -rw-r--r-- | scripts/amp2.lua | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/scripts/amp2.lua b/scripts/amp2.lua index f6328ff404..42316af493 100644 --- a/scripts/amp2.lua +++ b/scripts/amp2.lua @@ -34,8 +34,17 @@ end function dsp_runmap (bufs, in_map, out_map, n_samples, offset) for c = 1,audio_ins do - local b = in_map:get(ARDOUR.DataType("audio"), c - 1); -- get id of mapped buffer - local a = bufs:get_audio(b):data(offset):array() -- get a reference (pointer to array) + -- ensure that processing does happen in-place + local ib = in_map:get(ARDOUR.DataType("audio"), c - 1); -- get id of mapped input buffer for given cannel + local ob = out_map:get(ARDOUR.DataType("audio"), c - 1); -- get id of mapped output buffer for given cannel + assert (ib ~= ARDOUR.ChanMapping.Invalid); + assert (ob ~= ARDOUR.ChanMapping.Invalid); + + local bi = bufs:get_audio(ib) + local bo = bufs:get_audio(ob) + assert (bi:sameinstance(bo)) + + local a = bufs:get_audio(ib):data(offset):array() -- get a reference (pointer to array) for s = 1,n_samples do a[s] = a[s] * 2; -- modify data in-place (shared with ardour) end |