1 ardour { ["type"] = "dsp", name = "Lua Convolver", license = "MIT", author = "Ardour Lua Task Force", description = [[Another simple DSP example]] }
3 function dsp_ioconfig () return
5 { audio_in = 1, audio_out = 1},
6 { audio_in = 1, audio_out = 2},
7 { audio_in = 2, audio_out = 2},
11 local conv, mode, ir_file
13 ir_file = "/tmp/reverbs/St Nicolaes Church.wav"
14 ir_file = "/tmp/reverbs/Large Wide Echo Hall.wav"
16 function dsp_configure (ins, outs)
17 if outs:n_audio() == 1 then
18 assert (ins:n_audio() == 1)
19 mode = ARDOUR.DSP.IRChannelConfig.Mono
20 elseif ins:n_audio() == 1 then
21 assert (outs:n_audio() == 2)
22 mode = ARDOUR.DSP.IRChannelConfig.MonoToStereo
24 assert (ins:n_audio() == 2)
25 assert (outs:n_audio() == 2)
26 mode = ARDOUR.DSP.IRChannelConfig.Stereo
29 local irs = ARDOUR.DSP.IRSettings()
31 conv = ARDOUR.DSP.Convolver (Session, ir_file, mode, irs)
35 function dsp_latency ()
43 -- the DSP callback function to process audio audio
44 -- "ins" and "outs" are http://manual.ardour.org/lua-scripting/class_reference/#C:FloatArray
45 function dsp_run (ins, outs, n_samples)
46 assert (#ins <= #outs)
49 if ins[c] ~= outs[c] then -- if processing is not in-place..
50 ARDOUR.DSP.copy_vector (outs[c], ins[c], n_samples) -- ..copy data from input to output.
55 conv:run (outs[1], n_samples)
57 conv:run_stereo (outs[1], outs[2], n_samples)