Use PBD::string_to<bool>() in GenericMidiControlProtocol class

[ardour.git] / scripts / _dsp_plugin_communication.lua

diff --git a/scripts/_dsp_plugin_communication.lua b/scripts/_dsp_plugin_communication.lua
index 0df16a7ab02138a5fe00fb3c33761a7cad3fd94f..e422e08cca632aba6f4b85e2b77dd752d340d934 100644 (file)
--- a/scripts/_dsp_plugin_communication.lua
+++ b/scripts/_dsp_plugin_communication.lua
@@ -21,9 +21,10 @@ function dsp_run (ins, outs, n_samples)
        local route = self:route ()
        local shmem = self:shmem ()
 
+       -- count plugins
        local i = 0;
        local l = 0;
-       local s = -1;
+       local s = -1; -- 'self' this plugin instance
 
        -- iterate overall plugins on this track,
        -- find all LuaProc instances of this plugin (unique_id),
@@ -33,12 +34,16 @@ function dsp_run (ins, outs, n_samples)
                        and not proc:to_insert():plugin (0):to_luaproc():isnil ()
                        and proc:to_insert():plugin (0):unique_id () == self:unique_id () then
                        if (self:id ():to_s() == proc:to_insert():plugin (0):id ():to_s()) then
-                               s = l; -- this plugin instance
+                               s = l; -- *this* plugin instance
                        end
                        if l == 0 then
+                               -- use shared-memory are of the first plugin instance for all.
+                               --
+                               -- (the first plugin writes there, all later plugins only read,
+                               -- plugins on a track are executed in order, in the same thread)
                                shmem = proc:to_insert():plugin (0):to_luaproc():shmem ()
                        end
-                       l = l + 1 -- count total instances of this plugin
+                       l = l + 1 -- count total instances of this plugin-type
                end
                i = i + 1
        until proc:isnil ()
@@ -55,6 +60,8 @@ function dsp_run (ins, outs, n_samples)
                peak = ARDOUR.DSP.compute_peak(outs[c], n_samples, peak)
        end
 
+
+       -- actual inter-plugin communication
        local a = shmem:to_float (0):array ()
        if s == 0 then
                -- the first plugin saves the peak