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[ardour.git] / scripts / amp3.lua

diff --git a/scripts/amp3.lua b/scripts/amp3.lua
index 2f246a252dd8637c02164c7a7a0694582faea30e..186ece97312a6fd7d6eebd72140c65956c0d49b4 100644 (file)
--- a/scripts/amp3.lua
+++ b/scripts/amp3.lua
@@ -1,6 +1,7 @@
 ardour {
        ["type"]    = "dsp",
        name        = "Simple Amp III",
+       category    = "Example",
        license     = "MIT",
        author      = "Robin Gareus",
        email       = "robin@gareus.org",
@@ -31,15 +32,15 @@ end
 -- This is as efficient as Ardour doing it itself in C++
 -- Lua function overhead is negligible
 --
--- this also exemplifies the /simpler/ way of letting ardour to
--- the channel and offset mapping.
+-- this also exemplifies the /simpler/ way of delegating the
+-- channel-mapping to ardour.
 
 function dsp_run (ins, outs, n_samples)
        local ctrl = CtrlPorts:array() -- get control port array (read/write)
        local gain = ARDOUR.DSP.dB_to_coefficient (ctrl[1])
-       assert (#ins == #outs) -- ensure that we can run in-place
+       assert (#ins == #outs) -- ensure that we can run in-place (channel count matches)
        for c = 1,#ins do
-       --for c in pairs (ins) do -- also works, slightly less effective
+               assert (ins[c]:sameinstance(outs[c])) -- check in-place
                ARDOUR.DSP.apply_gain_to_buffer (ins[c], n_samples, gain); -- process in-place
        end
 end