31 lines
744 B
Lua
31 lines
744 B
Lua
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instrument=klass()
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function instrument:init(callback)
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self.callback=callback
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self.volume=1.0
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end
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function instrument:spackle(track,channel,t0,t1,note,verbs)
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-- a one-indexed table of note data
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-- (one-indexed because Lua kind of sucks)
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local nflagses,keep_silence=self.callback(t1-t0,note,instrument_split_verbs(verbs))
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for i,nflags in pairs(nflagses) do
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if nflags.v>0 or keep_silence then
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nflags = nflags:clone() -- avoid breaking instrument
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local min_v=0
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if (nflags.v>0) min_v = 1
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nflags.v = mid(flr(nflags.v * self.volume + 0.5),min_v,7)
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track:plot(channel,t0+i-1,nflags)
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end
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end
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end
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instrument_split_verbs=function(x)
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if (not x) return {}
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local t={}
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for i in all(split(x)) do
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t[i]=true
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end
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return t
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end
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