diff options
Diffstat (limited to 'scripts/amp3.lua')
-rw-r--r-- | scripts/amp3.lua | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/scripts/amp3.lua b/scripts/amp3.lua new file mode 100644 index 0000000000..2f246a252d --- /dev/null +++ b/scripts/amp3.lua @@ -0,0 +1,45 @@ +ardour { + ["type"] = "dsp", + name = "Simple Amp III", + license = "MIT", + author = "Robin Gareus", + email = "robin@gareus.org", + site = "http://gareus.org", + 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 letting ardour to +-- the channel and offset mapping. + +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 + for c = 1,#ins do + --for c in pairs (ins) do -- also works, slightly less effective + ARDOUR.DSP.apply_gain_to_buffer (ins[c], n_samples, gain); -- process in-place + end +end |