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Diffstat (limited to 'share/scripts/_amp3.lua')
-rw-r--r-- | share/scripts/_amp3.lua | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/share/scripts/_amp3.lua b/share/scripts/_amp3.lua new file mode 100644 index 0000000000..006a22afbb --- /dev/null +++ b/share/scripts/_amp3.lua @@ -0,0 +1,44 @@ +ardour { + ["type"] = "dsp", + name = "Simple Amp III", + category = "Example", + license = "MIT", + author = "Ardour Lua Task Force", + description = [[ + An Example DSP Plugin for processing audio, to + be used with Ardour's Lua scripting facility.]] +} + +function dsp_ioconfig () + return + { + { audio_in = -1, audio_out = -1}, + } +end + + +function dsp_params () + return + { + { ["type"] = "input", name = "Gain", min = -20, max = 20, default = 6, unit="dB", scalepoints = { ["0"] = 0, ["twice as loud"] = 6 , ["half as loud"] = -6 } }, + } +end + + +-- use ardour's vectorized functions +-- +-- This is as efficient as Ardour doing it itself in C++ +-- Lua function overhead is negligible +-- +-- 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 (channel count matches) + for c = 1,#ins do + assert (ins[c] == outs[c]) -- check in-place + ARDOUR.DSP.apply_gain_to_buffer (ins[c], n_samples, gain); -- process in-place + end +end |