add lua script to test channel-mapping, update doc

gtk2_ardour/arluadoc

@@ -11,4 +11,5 @@ $TOP/build/gtk2_ardour/luadoc "$@" \
 	| sed 's/, std::allocator<[^>]*<[^>]*>[ ]*>//g;' \
 	| sed 's/, std::allocator<[^>]*>//g;' \
 	| sed 's/ "/"/g;' \
-	| gzip -9
+	| gzip -9 \
+	> $TOP/doc/luadoc.json.gz

scripts/s_chanmap.lua

@@ -0,0 +1,22 @@
+ardour { ["type"] = "Snippet", name = "plugin channel mapping" }
+
+function factory () return function ()
+	-- first track needs to be stereo and has a stereo plugin
+	-- (x42-eq with spectrum display, per channel processing,
+	--  and pre/post visualization is handy here)
+
+	r = Session:route_by_remote_id(1)
+	pi = r:nth_plugin(0):to_insert()
+
+	pi:set_no_inplace (true)
+
+	cm = ARDOUR.ChanMapping()
+	--cm:set(ARDOUR.DataType("Audio"), 0, 0)
+	cm:set(ARDOUR.DataType("Audio"), 1, 0)
+	pi:set_input_map (0, cm)
+
+	cm = ARDOUR.ChanMapping()
+	--cm:set(ARDOUR.DataType("Audio"), 0, 0)
+	cm:set(ARDOUR.DataType("Audio"), 1, 0)
+	pi:set_output_map (0, cm)
+end end

tools/doxy2json/ardourdoc.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
+cd `dirname $0`
 set -e
 make
 cd ../..