Also move Lua scripts to share subfolder

share/scripts/_amp1.lua

@@ -0,0 +1,47 @@
+ardour {
+	["type"]    = "dsp",
+	name        = "Simple Amp",
+	category    = "Example",
+	license     = "MIT",
+	author      = "Ardour Lua Task Force",
+	description = [[
+	An Example DSP Plugin for processing audio, to
+	be used with Ardour's Lua scripting facility.]]
+}
+
+
+-- return possible i/o configurations
+function dsp_ioconfig ()
+	-- -1, -1 = any number of channels as long as input and output count matches
+	return { [1] = { audio_in = -1, audio_out = -1}, }
+end
+
+-- optional function, called when configuring the plugin
+function dsp_configure (ins, outs)
+	-- store configuration in global variable
+	audio_ins = ins:n_audio();
+	local audio_outs = outs:n_audio()
+	assert (audio_ins == audio_outs)
+end
+
+-- this variant asks for a complete *copy* of the
+-- audio data in a lua-table.
+-- after processing the data is copied back.
+--
+-- this also exemplifies the direct "connect and run" process function,
+-- where the channel-mapping needs to be done in lua.
+
+function dsp_runmap (bufs, in_map, out_map, n_samples, offset)
+	for c = 1,audio_ins do
+		-- Note: lua starts counting at 1, ardour's ChanMapping::get() at 0
+		local ib = in_map:get(ARDOUR.DataType("audio"), c - 1); -- get id of mapped input buffer for given channel
+		local ob = out_map:get(ARDOUR.DataType("audio"), c - 1); -- get id of mapped output buffer for given channel
+		assert (ib ~= ARDOUR.ChanMapping.Invalid);
+		assert (ob ~= ARDOUR.ChanMapping.Invalid);
+		local a = bufs:get_audio (ib):data (offset):get_table(n_samples) -- copy audio-data from input buffer
+		for s = 1,n_samples do
+			a[s] = a[s] * 2; -- amplify data in lua table
+		end
+		bufs:get_audio(ob):data(offset):set_table(a, n_samples) -- copy back
+	end
+end