52 lines
1.1 KiB
Lua
52 lines
1.1 KiB
Lua
ardour {
|
|
["type"] = "dsp",
|
|
name = "Lua Fluid Synth",
|
|
category = "Instrument",
|
|
license = "MIT",
|
|
author = "Ardour Lua Task Force",
|
|
description = [[An Example Synth for Prototyping.]]
|
|
}
|
|
|
|
function dsp_ioconfig ()
|
|
return
|
|
{
|
|
{ midi_in = 1, audio_in = 0, audio_out = 2},
|
|
}
|
|
end
|
|
|
|
fluidsynth = nil
|
|
|
|
function dsp_init (rate)
|
|
fluidsynth = ARDOUR.FluidSynth (rate, 32)
|
|
assert (fluidsynth:load_sf2 ("/usr/share/sounds/sf2/FluidR3_GM.sf2"))
|
|
end
|
|
|
|
function dsp_run (ins, outs, n_samples)
|
|
local tme = 1
|
|
assert (#outs == 2)
|
|
|
|
-- parse midi messages
|
|
assert (type(midiin) == "table") -- global table of midi events (for now)
|
|
for _, e in pairs (midiin) do
|
|
local t = e["time"] -- t = [ 1 .. n_samples ]
|
|
|
|
-- synth sound until event
|
|
if t > tme then
|
|
local off = tme - 1
|
|
local len = t - tme
|
|
fluidsynth:synth (outs[1]:offset (off), outs[2]:offset (off), len)
|
|
end
|
|
|
|
tme = t + 1
|
|
|
|
fluidsynth:midi_event (e["bytes"], e["size"]) -- parse midi event
|
|
end
|
|
|
|
-- synth rest of cycle
|
|
if tme <= n_samples then
|
|
local off = tme - 1
|
|
local len = 1 + n_samples - tme
|
|
fluidsynth:synth (outs[1]:offset (off), outs[2]:offset (off), len)
|
|
end
|
|
end
|