-- C++ side and you generally just build chains.
io.write("hello from lua\n");
+local live_signal_num = 0;
+local preview_signal_num = 1;
+
-- The main live chain. Currently just about input 0 with some color correction.
local main_chain = EffectChain.new(16, 9);
local input0 = main_chain:add_live_input();
input0:connect_signal(0);
-local wb_effect = main_chain:add_effect(WhiteBalanceEffect.new(), input0);
-wb_effect:set_float("output_color_temperature", 1234.0);
+local resample_effect = main_chain:add_effect(ResampleEffect.new(), input0);
+resample_effect:set_int("width", 320);
+resample_effect:set_int("height", 180);
+local padding_effect = main_chain:add_effect(PaddingEffect.new(), resample_effect);
+padding_effect:set_int("width", 1280);
+padding_effect:set_int("height", 720);
+padding_effect:set_float("left", 30.0);
+padding_effect:set_float("top", 60.0);
+local wb_effect = main_chain:add_effect(WhiteBalanceEffect.new(), padding_effect);
main_chain:finalize(true);
-- local input1 = main_chain.add_input(Inputs.create(1));
-- local resample_effect = main_chain.add_effect(ResampleEffect.new(), input0);
-- Returns the number of outputs in addition to the live (0) and preview (1).
-- Called only once, at the start of the program.
function num_channels()
- return 0;
+ return 2;
end
-- Called every frame.
end
function transition_clicked(num, t)
- -- Presumably do some sort of transition here.
- io.write("STUB: transition_clicked\n");
+ -- Only a cut for now.
+ local temp = live_signal_num;
+ live_signal_num = preview_signal_num;
+ preview_signal_num = temp;
end
function channel_clicked(num, t)
-- current time in seconds. width and height are the dimensions of
-- the output, although you can ignore them if you don't need them
-- (they're useful if you want to e.g. know what to resample by).
+--
+-- You should return two objects; the chain itself, and then a
+-- function (taking no parameters) that is run just before rendering.
+-- The function needs to call connect_signal on any inputs, so that
+-- it gets updated video data for the given frame. (You are allowed
+-- to switch which input your input is getting from between frames,
+-- but not calling connect_signal results in undefined behavior.)
-- If you want to change any parameters in the chain, this is also
-- the right place.
--
function get_chain(num, t, width, height)
if num == 0 then -- Live.
prepare = function()
- input0:connect_signal(1);
+ input0:connect_signal(live_signal_num);
wb_effect:set_float("output_color_temperature", 3500.0 + t * 100.0);
end
return main_chain, prepare;
end
if num == 1 then -- Preview.
prepare = function()
- simple_chain_input:connect_signal(0);
+ simple_chain_input:connect_signal(preview_signal_num);
end
return simple_chain, prepare;
end