-- 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
--- The main live chain.
-function make_sbs_chain(input0_deint, input1_deint, hq)
- local chain = EffectChain.new(16, 9)
- local input0 = chain:add_live_input(not input0_deint, input0_deint) -- Override bounce only if not deinterlacing.
- input0:connect_signal(0)
- local input0_wb_effect = chain:add_effect(WhiteBalanceEffect.new())
- local input1 = chain:add_live_input(not input1_deint, input1_deint)
- input1:connect_signal(1)
- local input1_wb_effect = chain:add_effect(WhiteBalanceEffect.new())
+-- 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_cartesian_product_internal(parms, callback, 1, {})
+end
+
+function make_cartesian_product_internal(parms, callback, index, args)
+ if index > #parms then
+ return callback(unpack(args))
+ end
+ local ret = {}
+ for _, value in ipairs(parms[index]) do
+ args[index] = value
+ ret[value] = make_cartesian_product_internal(parms, callback, index + 1, args)
+ end
+ return ret
+end
+
+function make_sbs_input(chain, signal, deint, hq)
+ local input = chain:add_live_input(not deint, deint) -- Override bounce only if not deinterlacing.
+ input:connect_signal(signal)
+ local wb_effect = chain:add_effect(WhiteBalanceEffect.new())
local resample_effect = nil
local resize_effect = nil
if (hq) then
- resample_effect = chain:add_effect(ResampleEffect.new(), input0_wb_effect)
+ resample_effect = chain:add_effect(ResampleEffect.new())
else
- resize_effect = chain:add_effect(ResizeEffect.new(), input0_wb_effect)
+ resize_effect = chain:add_effect(ResizeEffect.new())
end
local padding_effect = chain:add_effect(IntegralPaddingEffect.new())
- padding_effect:set_vec4("border_color", 0.0, 0.0, 0.0, 1.0)
- local resample2_effect = nil
- local resize2_effect = nil
- if (hq) then
- resample2_effect = chain:add_effect(ResampleEffect.new(), input1_wb_effect)
- else
- resize2_effect = chain:add_effect(ResizeEffect.new(), input1_wb_effect)
- end
- local padding2_effect = chain:add_effect(IntegralPaddingEffect.new())
+ return {
+ input = input,
+ wb_effect = wb_effect,
+ resample_effect = resample_effect,
+ resize_effect = resize_effect,
+ padding_effect = padding_effect
+ }
+end
- chain:add_effect(OverlayEffect.new(), padding_effect, padding2_effect)
+-- The main live chain.
+function make_sbs_chain(input0_deint, input1_deint, hq)
+ local chain = EffectChain.new(16, 9)
+
+ local input0 = make_sbs_input(chain, INPUT0_SIGNAL_NUM, input0_deint, hq)
+ local input1 = make_sbs_input(chain, INPUT1_SIGNAL_NUM, input1_deint, hq)
+
+ input0.padding_effect:set_vec4("border_color", 0.0, 0.0, 0.0, 1.0)
+ input1.padding_effect:set_vec4("border_color", 0.0, 0.0, 0.0, 0.0)
+
+ chain:add_effect(OverlayEffect.new(), input0.padding_effect, input1.padding_effect)
chain:finalize(hq)
return {
chain = chain,
- input0 = {
- input = input0,
- wb_effect = input0_wb_effect,
- resample_effect = resample_effect,
- resize_effect = resize_effect,
- padding_effect = padding_effect
- },
- input1 = {
- input = input1,
- wb_effect = input1_wb_effect,
- resample_effect = resample2_effect,
- resize_effect = resize2_effect,
- padding_effect = padding2_effect
- }
+ input0 = input0,
+ input1 = input1
}
end
-- Make all possible combinations of side-by-side chains.
-local sbs_chains = {}
-for input0_type, input0_deint in pairs({live = false, livedeint = true}) do
- sbs_chains[input0_type] = {}
- for input1_type, input1_deint in pairs({live = false, livedeint = true}) do
- sbs_chains[input0_type][input1_type] = {}
- for _, hq in pairs({true, false}) do
- sbs_chains[input0_type][input1_type][hq] =
- make_sbs_chain(input0_deint, input1_deint, hq)
- end
+local sbs_chains = make_cartesian_product({
+ {"live", "livedeint"}, -- input0_type
+ {"live", "livedeint"}, -- input1_type
+ {true, false} -- hq
+}, function(input0_type, input1_type, hq)
+ local input0_deint = (input0_type == "livedeint")
+ local input1_deint = (input1_type == "livedeint")
+ return make_sbs_chain(input0_deint, input1_deint, hq)
+end)
+
+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())
+ input:connect_signal(signal)
+ last = wb_effect
+ else
+ input = chain:add_effect(ImageInput.new("bg.jpeg"))
+ 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, wb0_effect, input0_last, input1, wb1_effect, input1_last
+ 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)
- if input0_live then
- input0 = chain:add_live_input(false, input0_deint)
- wb0_effect = chain:add_effect(WhiteBalanceEffect.new())
- input0:connect_signal(0)
- input0_last = wb0_effect
- else
- input0 = chain:add_effect(ImageInput.new("bg.jpeg"))
- input0_last = input0
- end
-
- if input1_live then
- input1 = chain:add_live_input(false, input1_deint)
- wb1_effect = chain:add_effect(WhiteBalanceEffect.new())
- input1:connect_signal(1)
- input1_last = wb1_effect
- else
- input1 = chain:add_effect(ImageInput.new("bg.jpeg"))
- input1_last = input1
- end
-
- local mix_effect = chain:add_effect(MixEffect.new(), input0_last, input1_last)
+ local mix_effect = chain:add_effect(MixEffect.new(), input0.last, input1.last)
chain:finalize(hq)
return {
chain = chain,
- input0 = {
- input = input0,
- wb_effect = wb0_effect
- },
- input1 = {
- input = input1,
- wb_effect = wb1_effect
- },
+ input0 = input0,
+ input1 = input1,
mix_effect = mix_effect
}
end
-- Chains to fade between two inputs, in various configurations.
-local fade_chains = {}
-for input0_type, input0_live in pairs({static = false, live = true, livedeint = true}) do
- local input0_deint = (input0_live == "livedeint")
- fade_chains[input0_type] = {}
- for input1_type, input1_live in pairs({static = false, live = true, livedeint = true}) do
- local input1_deint = (input1_live == "livedeint")
- fade_chains[input0_type][input1_type] = {}
- for _, hq in pairs({true, false}) do
- fade_chains[input0_type][input1_type][hq] =
- make_fade_chain(input0_live, input0_deint, input1_live, input1_deint, hq)
- end
- end
-end
+local fade_chains = make_cartesian_product({
+ {"static", "live", "livedeint"}, -- input0_type
+ {true, false}, -- input0_scale
+ {"static", "live", "livedeint"}, -- input1_type
+ {true, false}, -- input1_scale
+ {true, false} -- 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, 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 = {}
-for input_type, input_deint in pairs({live = false, livedeint = true}) do
- simple_chains[input_type] = {}
- for _, hq in pairs({true, false}) do
- simple_chains[input_type][hq] = make_simple_chain(input_deint, hq)
- end
-end
+local simple_chains = make_cartesian_product({
+ {"live", "livedeint"}, -- input_type
+ {true, false}, -- input_scale
+ {true, false} -- hq
+}, function(input_type, input_scale, hq)
+ local input_deint = (input_type == "livedeint")
+ return make_simple_chain(input_deint, input_scale, hq)
+end)
-- A chain to show a single static picture on screen (HQ version).
local static_chain_hq = EffectChain.new(16, 9)
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()
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
projects / nageru / blobdiff