Clarify documentation of Lua inter-processor communication
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@ -21,9 +21,10 @@ function dsp_run (ins, outs, n_samples)
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local route = self:route ()
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local shmem = self:shmem ()
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-- count plugins
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local i = 0;
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local l = 0;
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local s = -1;
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local s = -1; -- 'self' this plugin instance
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-- iterate overall plugins on this track,
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-- find all LuaProc instances of this plugin (unique_id),
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@ -33,12 +34,16 @@ function dsp_run (ins, outs, n_samples)
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and not proc:to_insert():plugin (0):to_luaproc():isnil ()
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and proc:to_insert():plugin (0):unique_id () == self:unique_id () then
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if (self:id ():to_s() == proc:to_insert():plugin (0):id ():to_s()) then
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s = l; -- this plugin instance
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s = l; -- *this* plugin instance
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end
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if l == 0 then
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-- use shared-memory are of the first plugin instance for all.
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--
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-- (the first plugin writes there, all later plugins only read,
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-- plugins on a track are executed in order, in the same thread)
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shmem = proc:to_insert():plugin (0):to_luaproc():shmem ()
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end
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l = l + 1 -- count total instances of this plugin
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l = l + 1 -- count total instances of this plugin-type
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end
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i = i + 1
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until proc:isnil ()
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@ -55,6 +60,8 @@ function dsp_run (ins, outs, n_samples)
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peak = ARDOUR.DSP.compute_peak(outs[c], n_samples, peak)
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end
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-- actual inter-plugin communication
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local a = shmem:to_float (0):array ()
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if s == 0 then
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-- the first plugin saves the peak
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