-- where all the low-level details (such as texture formats) are handled by the
-- C++ side and you generally just build chains.
--- TODO: Deal with inputs that are different from our native 1280x720 resolution.
-
local transition_start = -2.0
local transition_end = -1.0
local zoom_src = 0.0
-- to the next.
local FADE_SIGNAL_NUM = 4
+-- Last width/height/resolution for each channel, if we have it.
+local last_resolution = {}
+
-- Utility function to help creating many similar chains that can differ
-- in a free set of chosen parameters.
function make_cartesian_product(parms, callback)
return make_sbs_chain(input0_deint, input1_deint, hq)
end)
-function make_fade_input(chain, signal, live, deint)
- local input, wb_effect, last
+function make_fade_input(chain, signal, live, deint, scale)
+ local input, wb_effect, resample_effect, last
if live then
input = chain:add_live_input(false, deint)
wb_effect = chain:add_effect(WhiteBalanceEffect.new())
last = input
end
+ -- If we cared about this for the non-main inputs, we would have
+ -- checked hq here and invoked ResizeEffect instead.
+ if scale then
+ resample_effect = chain:add_effect(ResampleEffect.new())
+ last = resample_effect
+ end
+
return {
input = input,
wb_effect = wb_effect,
+ resample_effect = resample_effect,
last = last
}
end
-- A chain to fade between two inputs, of which either can be a picture
-- or a live input. In practice only used live, but we still support the
-- hq parameter.
-function make_fade_chain(input0_live, input0_deint, input1_live, input1_deint, hq)
+function make_fade_chain(input0_live, input0_deint, input0_scale, input1_live, input1_deint, input1_scale, hq)
local chain = EffectChain.new(16, 9)
- local input0 = make_fade_input(chain, INPUT0_SIGNAL_NUM, input0_live, input0_deint)
- local input1 = make_fade_input(chain, INPUT1_SIGNAL_NUM, input1_live, input1_deint)
+ local input0 = make_fade_input(chain, INPUT0_SIGNAL_NUM, input0_live, input0_deint, input0_scale)
+ local input1 = make_fade_input(chain, INPUT1_SIGNAL_NUM, input1_live, input1_deint, input1_scale)
local mix_effect = chain:add_effect(MixEffect.new(), input0.last, input1.last)
chain:finalize(hq)
-- Chains to fade between two inputs, in various configurations.
local fade_chains = make_cartesian_product({
{"static", "live", "livedeint"}, -- input0_type
+ {true, false}, -- input0_scale
{"static", "live", "livedeint"}, -- input1_type
- {true, false} -- hq
-}, function(input0_type, input1_type, hq)
+ {true, false}, -- input1_scale
+ {true} -- hq
+}, function(input0_type, input0_scale, input1_type, input1_scale, hq)
local input0_live = (input0_type ~= "static")
local input1_live = (input1_type ~= "static")
local input0_deint = (input0_type == "livedeint")
local input1_deint = (input1_type == "livedeint")
- return make_fade_chain(input0_live, input0_deint, input1_live, input1_deint, hq)
+ return make_fade_chain(input0_live, input0_deint, input0_scale, input1_live, input1_deint, input1_scale, hq)
end)
-- A chain to show a single input on screen.
-function make_simple_chain(input_deint, hq)
+function make_simple_chain(input_deint, input_scale, hq)
local chain = EffectChain.new(16, 9)
local input = chain:add_live_input(false, input_deint)
local wb_effect = chain:add_effect(WhiteBalanceEffect.new())
chain:finalize(hq)
+ local resample_effect, resize_effect
+ if scale then
+ if hq then
+ resample_effect = chain:add_effect(ResampleEffect.new())
+ else
+ resize_effect = chain:add_effect(ResizeEffect.new())
+ end
+ end
+
return {
chain = chain,
input = input,
- wb_effect = wb_effect
+ wb_effect = wb_effect,
+ resample_effect = resample_effect,
+ resize_effect = resize_effect
}
end
-- Make all possible combinations of single-input chains.
local simple_chains = make_cartesian_product({
{"live", "livedeint"}, -- input_type
+ {true, false}, -- input_scale
{true, false} -- hq
-}, function(input_type, hq)
+}, function(input_type, input_scale, hq)
local input_deint = (input_type == "livedeint")
- return make_simple_chain(input_deint, hq)
+ return make_simple_chain(input_deint, input_scale, hq)
end)
-- A chain to show a single static picture on screen (HQ version).
end
end
+function needs_scale(signals, signal_num, width, height)
+ return (signals:get_width(signal_num) ~= width or signals:get_height(signal_num) ~= height)
+end
+
+function set_scale_parameters_if_needed(chain_or_input, width, height)
+ if chain_or_input.resample_effect then
+ chain_or_input.resample_effect:set_int("width", width)
+ chain_or_input.resample_effect:set_int("height", height)
+ elseif chain_or_input.resize_effect then
+ chain_or_input.resize_effect:set_int("width", width)
+ chain_or_input.resize_effect:set_int("height", height)
+ end
+end
+
-- 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 4
end
+-- Helper function to write e.g. ā720pā.
+function get_channel_resolution(signal_num)
+ if last_resolution[signal_num] then
+ if last_resolution[signal_num].height == 0 or
+ last_resolution[signal_num].height == 525 then
+ return "no signal"
+ elseif last_resolution[signal_num].interlaced then
+ return (last_resolution[signal_num].height * 2) .. "i"
+ else
+ return last_resolution[signal_num].height .. "p"
+ end
+ else
+ return "no signal"
+ end
+end
+
-- Returns the name for each additional channel (starting from 2).
--- Called only once for each channel, at the start of the program.
+-- Called at the start of the program, and then each frame for live
+-- channels in case they change resolution.
function channel_name(channel)
if channel == 2 then
- return "Input 1"
+ return "Input 1 (" .. get_channel_resolution(0) .. ")"
elseif channel == 3 then
- return "Input 2"
+ return "Input 2 (" .. get_channel_resolution(1) .. ")"
elseif channel == 4 then
return "Side-by-side"
elseif channel == 5 then
-- NOTE: The chain returned must be finalized with the Y'CbCr flag
-- if and only if num==0.
function get_chain(num, t, width, height, signals)
+ for signal_num=0,1 do
+ last_resolution[signal_num] = {
+ width = signals:get_width(signal_num),
+ height = signals:get_height(signal_num),
+ interlaced = signals:get_interlaced(signal_num)
+ }
+ end
+
if num == 0 then -- Live.
if live_signal_num == INPUT0_SIGNAL_NUM or live_signal_num == INPUT1_SIGNAL_NUM then -- Plain input.
local input_type = get_input_type(signals, live_signal_num)
- local chain = simple_chains[input_type][true]
+ local input_scale = needs_scale(signals, live_signal_num, width, height)
+ local chain = simple_chains[input_type][input_scale][true]
prepare = function()
chain.input:connect_signal(live_signal_num)
+ set_scale_parameters_if_needed(chain, width, height)
set_neutral_color_from_signal(chain.wb_effect, live_signal_num)
end
return chain.chain, prepare
return static_chain_hq, prepare
elseif live_signal_num == FADE_SIGNAL_NUM then -- Fade.
local input0_type = get_input_type(signals, fade_src_signal)
+ local input0_scale = needs_scale(signals, fade_src_signal, width, height)
local input1_type = get_input_type(signals, fade_dst_signal)
- local chain = fade_chains[input0_type][input1_type][true]
+ local input1_scale = needs_scale(signals, fade_dst_signal, width, height)
+ local chain = fade_chains[input0_type][input0_scale][input1_type][input1_scale][true]
prepare = function()
if input0_type == "live" then
chain.input0.input:connect_signal(fade_src_signal)
set_neutral_color_from_signal(chain.input0.wb_effect, fade_src_signal)
end
+ set_scale_parameters_if_needed(chain.input0, width, height)
if input1_type == "live" then
chain.input1.input:connect_signal(fade_dst_signal)
set_neutral_color_from_signal(chain.input1.wb_effect, fade_dst_signal)
end
+ set_scale_parameters_if_needed(chain.input1, width, height)
local tt = calc_fade_progress(t, transition_start, transition_end)
chain.mix_effect:set_float("strength_first", 1.0 - tt)
local input1_type = get_input_type(signals, INPUT1_SIGNAL_NUM)
if t > transition_end and zoom_dst == 1.0 then
-- Special case: Show only the single image on screen.
- local chain = simple_chains[input0_type][true]
+ local input0_scale = needs_scale(signals, fade_src_signal, width, height)
+ local chain = simple_chains[input0_type][input0_scale][true]
prepare = function()
chain.input:connect_signal(INPUT0_SIGNAL_NUM)
+ set_scale_parameters_if_needed(chain, width, height)
set_neutral_color(chain.wb_effect, input0_neutral_color)
end
return chain.chain, prepare
-- Individual preview inputs.
if num == INPUT0_SIGNAL_NUM + 2 then
local input_type = get_input_type(signals, INPUT0_SIGNAL_NUM)
- local chain = simple_chains[input_type][false]
+ local input_scale = needs_scale(signals, INPUT0_SIGNAL_NUM, width, height)
+ local chain = simple_chains[input_type][input_scale][false]
prepare = function()
chain.input:connect_signal(INPUT0_SIGNAL_NUM)
+ set_scale_parameters_if_needed(chain, width, height)
set_neutral_color(chain.wb_effect, input0_neutral_color)
end
return chain.chain, prepare
end
if num == INPUT1_SIGNAL_NUM + 2 then
local input_type = get_input_type(signals, INPUT1_SIGNAL_NUM)
- local chain = simple_chains[input_type][false]
+ local input_scale = needs_scale(signals, INPUT1_SIGNAL_NUM, width, height)
+ local chain = simple_chains[input_type][input_scale][false]
prepare = function()
chain.input:connect_signal(INPUT1_SIGNAL_NUM)
+ set_scale_parameters_if_needed(chain, width, height)
set_neutral_color(chain.wb_effect, input1_neutral_color)
end
return chain.chain, prepare