69 lines
1.7 KiB
Lua
69 lines
1.7 KiB
Lua
ardour { ["type"] = "dsp", name = "Lua Convolver", license = "MIT", author = "Ardour Team", description = [[Another simple DSP example]] }
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function dsp_ioconfig () return
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{
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{ audio_in = 1, audio_out = 1},
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{ audio_in = 1, audio_out = 2},
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{ audio_in = 2, audio_out = 2},
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}
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end
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local conv, mode, ir_file, buffered
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buffered = false
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ir_file = "/tmp/reverbs/St Nicolaes Church.wav"
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ir_file = "/tmp/reverbs/Large Wide Echo Hall.wav"
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function dsp_configure (ins, outs)
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if outs:n_audio() == 1 then
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assert (ins:n_audio() == 1)
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mode = ARDOUR.DSP.IRChannelConfig.Mono
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elseif ins:n_audio() == 1 then
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assert (outs:n_audio() == 2)
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mode = ARDOUR.DSP.IRChannelConfig.MonoToStereo
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else
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assert (ins:n_audio() == 2)
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assert (outs:n_audio() == 2)
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mode = ARDOUR.DSP.IRChannelConfig.Stereo
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end
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local irs = ARDOUR.DSP.IRSettings()
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irs.gain = 0.5
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conv = ARDOUR.DSP.Convolver (Session, ir_file, mode, irs)
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collectgarbage ()
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end
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function dsp_latency ()
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if conv and buffered then
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return conv:latency()
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else
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return 0
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end
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end
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-- the DSP callback function to process audio audio
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-- "ins" and "outs" are http://manual.ardour.org/lua-scripting/class_reference/#C:FloatArray
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function dsp_run (ins, outs, n_samples)
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assert (#ins <= #outs)
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for c = 1, #ins do
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if ins[c] ~= outs[c] then -- if processing is not in-place..
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ARDOUR.DSP.copy_vector (outs[c], ins[c], n_samples) -- ..copy data from input to output.
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end
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end
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if buffered then
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if #outs == 1 then
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conv:run_mono_buffered (outs[1], n_samples)
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else
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conv:run_stereo_buffered (outs[1], outs[2], n_samples)
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end
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else
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if #outs == 1 then
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conv:run_mono_no_latency (outs[1], n_samples)
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else
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conv:run_stereo_no_latency (outs[1], outs[2], n_samples)
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end
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end
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end
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