1 -- Nageru theme for ultimate productions, based on the default theme.
3 local transition_start = -2.0
4 local transition_end = -1.0
5 local transition_type = 0
6 local transition_src_signal = 0
7 local transition_dst_signal = 0
9 local neutral_colors = {
10 {0.5, 0.5, 0.5}, -- Input 0.
11 {0.5, 0.5, 0.5}, -- Input 1.
12 {0.5, 0.5, 0.5}, -- Input 2.
13 {0.5, 0.5, 0.5}, -- Input 3.
14 {0.5, 0.5, 0.5} -- Input 4.
17 local overlay_transition_start = -2.0
18 local overlay_transition_end = -1.0
19 local overlay_alpha_src = 0.0
20 local overlay_alpha_dst = 1.0
21 local overlay_enabled = false
23 local live_signal_num = 0
24 local preview_signal_num = 1
25 local NUM_CAMERAS = 5 -- Remember to update neutral_colors, too.
27 -- Valid values for live_signal_num and preview_signal_num.
28 local INPUT0_SIGNAL_NUM = 0
29 local INPUT1_SIGNAL_NUM = 1
30 local INPUT2_SIGNAL_NUM = 2
31 local INPUT3_SIGNAL_NUM = 3
32 local INPUT4_SIGNAL_NUM = 4
33 local SBS_SIGNAL_NUM = NUM_CAMERAS
34 local STATIC_SIGNAL_NUM = NUM_CAMERAS + 1
36 -- Preview-only signal showing the current signal with the overlay.
37 -- Not valid for live_signal_num!
38 local OVERLAY_SIGNAL_NUM = NUM_CAMERAS + 2
40 -- Valid values for transition_type. (Cuts are done directly, so they need no entry.)
41 local NO_TRANSITION = 0
42 local ZOOM_TRANSITION = 1
43 local FADE_TRANSITION = 2
45 -- Last width/height/frame rate for each channel, if we have it.
46 -- Note that unlike the values we get from Nageru, the resolution is per
47 -- frame and not per field, since we deinterlace.
48 local last_resolution = {}
50 local cef_path = Nageru.THEME_PATH:match("(.*)/nageru/")
51 local cef_input = HTMLInput.new("file://" .. cef_path .. "/score.html")
52 cef_input:execute_javascript_async("play()")
56 cef_input:execute_javascript_async("play()")
59 -- Utility function to help creating many similar chains that can differ
60 -- in a free set of chosen parameters.
61 function make_cartesian_product(parms, callback)
62 return make_cartesian_product_internal(parms, callback, 1, {})
65 function make_cartesian_product_internal(parms, callback, index, args)
66 if index > #parms then
67 return callback(unpack(args))
70 for _, value in ipairs(parms[index]) do
72 ret[value] = make_cartesian_product_internal(parms, callback, index + 1, args)
77 -- An overlay with variable alpha.
78 function make_overlay(chain, base)
79 local image = chain:add_html_input(cef_input)
80 local multiply_effect = chain:add_effect(MultiplyEffect.new())
81 local overlay_effect = chain:add_effect(OverlayEffect.new(), base, multiply_effect)
84 multiply_effect = multiply_effect,
85 overlay_effect = overlay_effect
89 function possibly_make_overlay(has_overlay, chain, base)
90 if has_overlay == true then
91 return make_overlay(chain, base)
97 function make_fade_input(chain, signal, live, deint, scale)
98 local input, wb_effect, resample_effect, last
100 input = chain:add_live_input(false, deint)
101 input:connect_signal(signal)
104 input = chain:add_effect(ImageInput.new("tfk_pause.png"))
108 -- If we cared about this for the non-main inputs, we would have
109 -- checked hq here and invoked ResizeEffect instead.
111 resample_effect = chain:add_effect(ResampleEffect.new())
112 last = resample_effect
115 -- Make sure to put the white balance after the scaling (usually more efficient).
117 wb_effect = chain:add_effect(WhiteBalanceEffect.new())
123 wb_effect = wb_effect,
124 resample_effect = resample_effect,
129 -- A chain to fade between two inputs, of which either can be a picture
130 -- or a live input. In practice only used live, but we still support the
132 function make_fade_chain(input0_live, input0_deint, input0_scale, input1_live, input1_deint, input1_scale, has_overlay, hq)
133 local chain = EffectChain.new(16, 9)
135 local input0 = make_fade_input(chain, INPUT0_SIGNAL_NUM, input0_live, input0_deint, input0_scale)
136 local input1 = make_fade_input(chain, INPUT1_SIGNAL_NUM, input1_live, input1_deint, input1_scale)
138 -- If fading between two live inputs, the overlay is put on top.
139 -- If fading between the static picture and a live input,
140 -- the overlay is put on the live input.
142 if input0_live and not input1_live then
143 overlay = possibly_make_overlay(has_overlay, chain, input0.last)
145 input0.last = overlay.overlay_effect
147 elseif input1_live and not input0_live then
148 overlay = possibly_make_overlay(has_overlay, chain, input1.last)
150 input1.last = overlay.overlay_effect
154 local mix_effect = chain:add_effect(MixEffect.new(), input0.last, input1.last)
155 if input0_live and input1_live then
156 overlay = possibly_make_overlay(has_overlay, chain, mix_effect)
165 mix_effect = mix_effect,
170 -- Chains to fade between two inputs, in various configurations.
171 local fade_chains = make_cartesian_product({
172 {"static", "live", "livedeint"}, -- input0_type
173 {true, false}, -- input0_scale
174 {"static", "live", "livedeint"}, -- input1_type
175 {true, false}, -- input1_scale
176 {true, false}, -- has_overlay
178 }, function(input0_type, input0_scale, input1_type, input1_scale, has_overlay, hq)
179 local input0_live = (input0_type ~= "static")
180 local input1_live = (input1_type ~= "static")
181 local input0_deint = (input0_type == "livedeint")
182 local input1_deint = (input1_type == "livedeint")
183 return make_fade_chain(input0_live, input0_deint, input0_scale, input1_live, input1_deint, input1_scale, has_overlay, hq)
186 function make_sbs_input(chain, signal, deint, has_overlay, hq)
187 local input = chain:add_live_input(not deint, deint) -- Override bounce only if not deinterlacing.
188 input:connect_signal(signal)
192 overlay = make_overlay(chain, input)
195 local resample_effect = nil
196 local resize_effect = nil
198 resample_effect = chain:add_effect(ResampleEffect.new())
200 resize_effect = chain:add_effect(ResizeEffect.new())
202 local wb_effect = chain:add_effect(WhiteBalanceEffect.new())
204 local padding_effect = chain:add_effect(IntegralPaddingEffect.new())
208 wb_effect = wb_effect,
209 resample_effect = resample_effect,
210 resize_effect = resize_effect,
211 padding_effect = padding_effect,
216 -- Side-by-side chains.
217 function make_sbs_chain(input0_type, input0_overlay, input1_type, hq)
218 local chain = EffectChain.new(16, 9)
220 local input0 = make_sbs_input(chain, INPUT0_SIGNAL_NUM, input0_type == "livedeint", input0_overlay, hq)
221 local input1 = make_sbs_input(chain, INPUT4_SIGNAL_NUM, input1_type == "livedeint", false, hq)
223 input0.padding_effect:set_vec4("border_color", 0.0, 0.0, 0.0, 1.0)
224 input1.padding_effect:set_vec4("border_color", 0.0, 0.0, 0.0, 0.0)
226 chain:add_effect(OverlayEffect.new(), input0.padding_effect, input1.padding_effect)
233 overlay = input0.overlay -- May be nil.
238 -- Make all possible combinations of side-by-side chains.
239 local sbs_chains = make_cartesian_product({
240 {"live", "livedeint"}, -- input0_type
241 {true, false}, -- input0_overlay
242 {"live", "livedeint"}, -- input1_type
244 }, function(input0_type, input0_overlay, input1_type, hq)
245 return make_sbs_chain(input0_type, input0_overlay, input1_type, hq)
248 -- A chain to show a single input on screen.
249 function make_simple_chain(input_deint, input_scale, has_overlay, hq)
250 local chain = EffectChain.new(16, 9)
252 local input = chain:add_live_input(false, input_deint)
253 input:connect_signal(0) -- First input card. Can be changed whenever you want.
255 local resample_effect, resize_effect
258 resample_effect = chain:add_effect(ResampleEffect.new())
260 resize_effect = chain:add_effect(ResizeEffect.new())
264 local wb_effect = chain:add_effect(WhiteBalanceEffect.new())
265 local overlay = possibly_make_overlay(has_overlay, chain, wb_effect)
272 wb_effect = wb_effect,
273 resample_effect = resample_effect,
274 resize_effect = resize_effect,
279 -- Make all possible combinations of single-input chains.
280 local simple_chains = make_cartesian_product({
281 {"live", "livedeint"}, -- input_type
282 {true, false}, -- input_scale
283 {true, false}, -- has_overlay
285 }, function(input_type, input_scale, has_overlay, hq)
286 local input_deint = (input_type == "livedeint")
287 return make_simple_chain(input_deint, input_scale, has_overlay, hq)
290 -- A chain to show a single static picture on screen. Never with CasparCG overlay.
291 local static_chains = make_cartesian_product({
294 local chain = EffectChain.new(16, 9)
295 local chain_input = chain:add_effect(ImageInput.new("tfk_pause.png"))
303 -- A chain to show the overlay and nothing more. LQ only,
304 -- since it is not a valid live signal.
305 local overlay_chain_lq = EffectChain.new(16, 9)
306 local overlay_chain_lq_input = overlay_chain_lq:add_html_input(cef_input)
307 overlay_chain_lq:finalize(false)
309 -- Used for indexing into the tables of chains.
310 function get_input_type(signals, signal_num)
311 if signal_num == STATIC_SIGNAL_NUM then
313 elseif signals:get_interlaced(signal_num) then
320 function needs_scale(signals, signal_num, width, height)
321 if signal_num == STATIC_SIGNAL_NUM then
322 -- We assume this is already correctly scaled at load time.
325 assert(is_plain_signal(signal_num))
326 return (signals:get_width(signal_num) ~= width or signals:get_height(signal_num) ~= height)
329 function set_scale_parameters_if_needed(chain_or_input, width, height)
330 if chain_or_input.resample_effect then
331 chain_or_input.resample_effect:set_int("width", width)
332 chain_or_input.resample_effect:set_int("height", height)
333 elseif chain_or_input.resize_effect then
334 chain_or_input.resize_effect:set_int("width", width)
335 chain_or_input.resize_effect:set_int("height", height)
340 -- Returns the number of outputs in addition to the live (0) and preview (1).
341 -- Called only once, at the start of the program.
342 function num_channels()
343 return NUM_CAMERAS + 3 -- sbs, static picture and overlay
346 function is_plain_signal(num)
347 return num >= INPUT0_SIGNAL_NUM and num <= INPUT4_SIGNAL_NUM
350 -- Helper function to write e.g. “720p60”. The difference between this
351 -- and get_channel_resolution_raw() is that this one also can say that
352 -- there's no signal.
353 function get_channel_resolution(signal_num)
354 res = last_resolution[signal_num]
355 if (not res) or not res.is_connected then
356 return "disconnected"
358 if res.height <= 0 then
361 if not res.has_signal then
362 if res.height == 525 then
363 -- Special mode for the USB3 cards.
366 return get_channel_resolution_raw(res) .. ", no signal"
368 return get_channel_resolution_raw(res)
372 -- Helper function to write e.g. “60” or “59.94”.
373 function get_frame_rate(res)
374 local nom = res.frame_rate_nom
375 local den = res.frame_rate_den
376 if nom % den == 0 then
379 return string.format("%.2f", nom / den)
383 -- Helper function to write e.g. “720p60”.
384 function get_channel_resolution_raw(res)
385 if res.interlaced then
386 return res.height .. "i" .. get_frame_rate(res)
388 return res.height .. "p" .. get_frame_rate(res)
393 -- Returns the name for each additional channel (starting from 2).
394 -- Called at the start of the program, and then each frame for live
395 -- channels in case they change resolution.
396 function channel_name(channel)
397 local signal_num = channel - 2
398 if signal_num == INPUT0_SIGNAL_NUM then
399 return "Main (" .. get_channel_resolution(signal_num) .. ")"
400 elseif signal_num == INPUT1_SIGNAL_NUM then
401 return "Secondary (" .. get_channel_resolution(signal_num) .. ")"
402 elseif signal_num == INPUT2_SIGNAL_NUM then
403 return "Goal L (" .. get_channel_resolution(signal_num) .. ")"
404 elseif signal_num == INPUT3_SIGNAL_NUM then
405 return "Goal R (" .. get_channel_resolution(signal_num) .. ")"
406 elseif signal_num == INPUT4_SIGNAL_NUM then
407 return "Commentators (" .. get_channel_resolution(signal_num) .. ")"
408 elseif signal_num == SBS_SIGNAL_NUM then
409 return "Side-by-side"
410 elseif signal_num == STATIC_SIGNAL_NUM then
411 return "Static picture"
412 elseif signal_num == OVERLAY_SIGNAL_NUM then
418 -- Returns, given a channel number, which signal it corresponds to (starting from 0).
419 -- Should return -1 if the channel does not correspond to a simple signal.
420 -- (The information is used for whether right-click on the channel should bring up
421 -- an input selector or not.)
422 -- Called once for each channel, at the start of the program.
423 -- Will never be called for live (0) or preview (1).
424 function channel_signal(channel)
425 if is_plain_signal(channel - 2) then
433 -- Called every frame. Returns the color (if any) to paint around the given
434 -- channel. Returns a CSS color (typically to mark live and preview signals);
435 -- "transparent" is allowed.
436 -- Will never be called for live (0) or preview (1).
437 function channel_color(channel)
438 if transition_type ~= NO_TRANSITION then
439 if channel_involved_in(channel, transition_src_signal) or
440 channel_involved_in(channel, transition_dst_signal) then
444 if channel_involved_in(channel, live_signal_num) then
448 if channel_involved_in(channel, preview_signal_num) then
454 function channel_involved_in(channel, signal_num)
455 if is_plain_signal(signal_num) then
456 return channel == (signal_num + 2)
458 if signal_num == SBS_SIGNAL_NUM then
459 return is_sbs_participating_signal(channel - 2)
461 if signal_num == STATIC_SIGNAL_NUM then
462 return (channel == NUM_CAMERAS)
468 -- Returns if a given channel supports setting white balance (starting from 2).
469 -- Called only once for each channel, at the start of the program.
470 function supports_set_wb(channel)
471 return is_plain_signal(channel - 2)
475 -- Gets called with a new gray point when the white balance is changing.
476 -- The color is in linear light (not sRGB gamma).
477 function set_wb(channel, red, green, blue)
478 if is_plain_signal(channel - 2) then
479 neutral_colors[channel - 2 + 1] = { red, green, blue }
483 function finish_transitions(t)
484 if transition_type ~= NO_TRANSITION and t >= transition_end then
485 live_signal_num = transition_dst_signal
486 transition_type = NO_TRANSITION
489 -- Disable the overlay if it is no longer visible.
490 if overlay_enabled and t > overlay_transition_end and overlay_alpha_dst == 0.0 then
491 overlay_enabled = false
492 print("Turning off overlay")
496 function in_transition(t)
497 return t >= transition_start and t <= transition_end
500 function is_sbs_participating_signal(signal_num)
501 return signal_num == INPUT0_SIGNAL_NUM or signal_num == INPUT4_SIGNAL_NUM
504 function simple_signal_has_overlay(signal_num)
505 -- The commentator output has no overlay on it.
506 return signal_num ~= INPUT4_SIGNAL_NUM
510 -- Called every frame.
511 function get_transitions(t)
512 if preview_signal_num == OVERLAY_SIGNAL_NUM then
513 if t < overlay_transition_end then
517 if overlay_enabled then
518 return {"Overlay off", "", "Fade ovl out"}
520 return {"Overlay on", "", "Fade ovl in"}
524 if in_transition(t) then
525 -- Transition already in progress, the only thing we can do is really
526 -- cut to the preview. (TODO: Make an “abort” and/or “finish”, too?)
530 if live_signal_num == preview_signal_num then
531 -- No transitions possible.
535 if (is_plain_signal(live_signal_num) or live_signal_num == STATIC_SIGNAL_NUM) and
536 (is_plain_signal(preview_signal_num) or preview_signal_num == STATIC_SIGNAL_NUM) then
537 return {"Cut", "", "Fade"}
541 if live_signal_num == SBS_SIGNAL_NUM and is_sbs_participating_signal(preview_signal_num) then
542 return {"Cut", "Zoom in"}
543 elseif is_sbs_participating_signal(live_signal_num) and preview_signal_num == SBS_SIGNAL_NUM then
544 return {"Cut", "Zoom out"}
550 function swap_preview_live()
551 local temp = live_signal_num
552 live_signal_num = preview_signal_num
553 preview_signal_num = temp
556 function start_transition(type_, t, duration)
558 transition_end = t + duration
559 transition_type = type_
560 transition_src_signal = live_signal_num
561 transition_dst_signal = preview_signal_num
566 -- Called when the user clicks a transition button.
567 function transition_clicked(num, t)
568 if preview_signal_num == OVERLAY_SIGNAL_NUM then
571 overlay_transition_start = -2.0
572 overlay_transition_end = -1.0
573 if overlay_enabled then
574 overlay_enabled = false
575 overlay_alpha_src = 0.0
576 overlay_alpha_dst = 0.0
578 overlay_enabled = true
579 overlay_alpha_src = 1.0
580 overlay_alpha_dst = 1.0
584 overlay_transition_start = t
585 overlay_transition_end = t + 1.0
586 if overlay_enabled then
587 overlay_alpha_src = 1.0
588 overlay_alpha_dst = 0.0
590 overlay_alpha_src = 0.0
591 overlay_alpha_dst = 1.0
593 overlay_enabled = true
600 if in_transition(t) then
601 -- Ongoing transition; finish it immediately before the cut.
602 finish_transitions(transition_end)
608 finish_transitions(t)
610 if live_signal_num == preview_signal_num then
615 if is_plain_signal(live_signal_num) and is_plain_signal(preview_signal_num) then
616 -- We can't zoom between these. Just make a cut.
617 io.write("Cutting from " .. live_signal_num .. " to " .. live_signal_num .. "\n")
622 if (live_signal_num == SBS_SIGNAL_NUM and is_sbs_participating_signal(preview_signal_num)) or
623 (preview_signal_num == SBS_SIGNAL_NUM and is_sbs_participating_signal(live_signal_num)) then
624 start_transition(ZOOM_TRANSITION, t, 1.0)
627 finish_transitions(t)
630 if (live_signal_num ~= preview_signal_num) and
631 (is_plain_signal(live_signal_num) or
632 live_signal_num == STATIC_SIGNAL_NUM) and
633 (is_plain_signal(preview_signal_num) or
634 preview_signal_num == STATIC_SIGNAL_NUM) then
635 start_transition(FADE_TRANSITION, t, 1.0)
637 -- Fades involving SBS are ignored (we have no chain for it).
643 function channel_clicked(num)
644 preview_signal_num = num
647 function get_fade_chain(signals, t, width, height, input_resolution)
648 local input0_type = get_input_type(signals, transition_src_signal)
649 local input0_scale = needs_scale(signals, transition_src_signal, width, height)
650 local input1_type = get_input_type(signals, transition_dst_signal)
651 local input1_scale = needs_scale(signals, transition_dst_signal, width, height)
652 local chain = fade_chains[input0_type][input0_scale][input1_type][input1_scale][overlay_enabled][true]
654 if input0_type == "live" or input0_type == "livedeint" then
655 chain.input0.input:connect_signal(transition_src_signal)
656 set_neutral_color_from_signal(chain.input0.wb_effect, transition_src_signal)
658 set_scale_parameters_if_needed(chain.input0, width, height)
659 if input1_type == "live" or input1_type == "livedeint" then
660 chain.input1.input:connect_signal(transition_dst_signal)
661 set_neutral_color_from_signal(chain.input1.wb_effect, transition_dst_signal)
663 set_scale_parameters_if_needed(chain.input1, width, height)
664 local tt = calc_fade_progress(t, transition_start, transition_end)
666 chain.mix_effect:set_float("strength_first", 1.0 - tt)
667 chain.mix_effect:set_float("strength_second", tt)
669 -- The commentator output has no overlay on it.
670 local extra_alpha_factor = 1.0
671 if not simple_signal_has_overlay(transition_src_signal) and
672 not simple_signal_has_overlay(transition_dst_signal) then
673 extra_alpha_factor = 0.0
674 elseif not simple_signal_has_overlay(transition_src_signal) then
675 extra_alpha_factor = tt
676 elseif not simple_signal_has_overlay(transition_dst_signal) then
677 extra_alpha_factor = 1.0 - tt
679 prepare_overlay_live(chain, t, extra_alpha_factor)
681 return chain.chain, prepare
684 -- SBS code (live_signal_num == SBS_SIGNAL_NUM, or in a transition to/from it).
685 function get_sbs_chain(signals, t, width, height, input_resolution)
686 local input0_type = get_input_type(signals, INPUT0_SIGNAL_NUM)
687 local input1_type = get_input_type(signals, INPUT4_SIGNAL_NUM)
688 return sbs_chains[input0_type][overlay_enabled][input1_type][true]
692 -- Called every frame. Get the chain for displaying at input <num>,
693 -- where 0 is live, 1 is preview, 2 is the first channel to display
694 -- in the bottom bar, and so on up to num_channels()+1. t is the
695 -- current time in seconds. width and height are the dimensions of
696 -- the output, although you can ignore them if you don't need them
697 -- (they're useful if you want to e.g. know what to resample by).
699 -- <signals> is basically an exposed InputState, which you can use to
700 -- query for information about the signals at the point of the current
701 -- frame. In particular, you can call get_width() and get_height()
702 -- for any signal number, and use that to e.g. assist in chain selection.
704 -- You should return two objects; the chain itself, and then a
705 -- function (taking no parameters) that is run just before rendering.
706 -- The function needs to call connect_signal on any inputs, so that
707 -- it gets updated video data for the given frame. (You are allowed
708 -- to switch which input your input is getting from between frames,
709 -- but not calling connect_signal results in undefined behavior.)
710 -- If you want to change any parameters in the chain, this is also
713 -- NOTE: The chain returned must be finalized with the Y'CbCr flag
714 -- if and only if num==0.
715 function get_chain(num, t, width, height, signals)
716 local input_resolution = {}
717 for signal_num=0,(NUM_CAMERAS-1) do
719 width = signals:get_width(signal_num),
720 height = signals:get_height(signal_num),
721 interlaced = signals:get_interlaced(signal_num),
722 has_signal = signals:get_has_signal(signal_num),
723 is_connected = signals:get_is_connected(signal_num),
724 frame_rate_nom = signals:get_frame_rate_nom(signal_num),
725 frame_rate_den = signals:get_frame_rate_den(signal_num)
728 if res.interlaced then
729 -- Convert height from frame height to field height.
730 -- (Needed for e.g. place_rectangle.)
731 res.height = res.height * 2
733 -- Show field rate instead of frame rate; really for cosmetics only
734 -- (and actually contrary to EBU recommendations, although in line
735 -- with typical user expectations).
736 res.frame_rate_nom = res.frame_rate_nom * 2
739 input_resolution[signal_num] = res
741 last_resolution = input_resolution
743 if num == 0 then -- Live.
744 -- See if we're in a transition.
745 finish_transitions(t)
746 if transition_type == ZOOM_TRANSITION then
747 -- Transition in or out of SBS.
748 local chain = get_sbs_chain(signals, t, width, height, input_resolution)
750 prepare_sbs_chain(chain, calc_zoom_progress(t), transition_type, transition_src_signal, transition_dst_signal, width, height, input_resolution)
751 prepare_overlay_live(chain, t, 1.0)
753 return chain.chain, prepare
754 elseif transition_type == NO_TRANSITION and live_signal_num == SBS_SIGNAL_NUM then
756 local chain = get_sbs_chain(signals, t, width, height, input_resolution)
758 prepare_sbs_chain(chain, 0.0, NO_TRANSITION, 0, SBS_SIGNAL_NUM, width, height, input_resolution)
759 prepare_overlay_live(chain, t, 1.0)
761 return chain.chain, prepare
762 elseif transition_type == FADE_TRANSITION then
763 return get_fade_chain(signals, t, width, height, input_resolution)
764 elseif is_plain_signal(live_signal_num) then
765 local input_type = get_input_type(signals, live_signal_num)
766 local input_scale = needs_scale(signals, live_signal_num, width, height)
767 local overlay_really_enabled = overlay_enabled and simple_signal_has_overlay(live_signal_num)
768 local chain = simple_chains[input_type][input_scale][overlay_really_enabled][true]
770 chain.input:connect_signal(live_signal_num)
771 set_scale_parameters_if_needed(chain, width, height)
772 set_neutral_color_from_signal(chain.wb_effect, live_signal_num)
773 prepare_overlay_live(chain, t, 1.0)
775 return chain.chain, prepare
776 elseif live_signal_num == STATIC_SIGNAL_NUM then -- Static picture.
777 local chain = static_chains[true]
779 prepare_overlay_live(chain, t, 1.0) -- FIXME: Should this ever be here?
781 return chain.chain, prepare
787 -- We do not show overlays on the individual preview inputs.
788 -- The M/E preview matches what we'd put live by doing a transition, as always.
789 local show_overlay = false
790 if num == 1 then -- Preview.
791 if preview_signal_num == OVERLAY_SIGNAL_NUM then
792 num = live_signal_num + 2
793 show_overlay = not overlay_enabled
795 if transition_type ~= NO_TRANSITION then
796 num = transition_dst_signal + 2
799 num = preview_signal_num + 2
800 show_overlay = overlay_enabled and simple_signal_has_overlay(preview_signal_num)
804 -- Individual preview inputs (usually without overlay).
805 if is_plain_signal(num - 2) then
806 local signal_num = num - 2
807 local input_type = get_input_type(signals, signal_num)
808 local input_scale = needs_scale(signals, signal_num, width, height)
809 local chain = simple_chains[input_type][input_scale][show_overlay][false]
811 chain.input:connect_signal(signal_num)
812 set_scale_parameters_if_needed(chain, width, height)
813 set_neutral_color(chain.wb_effect, neutral_colors[signal_num + 1])
814 prepare_overlay_static(chain, t)
816 return chain.chain, prepare
818 if num == SBS_SIGNAL_NUM + 2 then
819 local input0_type = get_input_type(signals, INPUT0_SIGNAL_NUM)
820 local input1_type = get_input_type(signals, INPUT4_SIGNAL_NUM)
821 local chain = sbs_chains[input0_type][show_overlay][input1_type][false]
823 prepare_sbs_chain(chain, 0.0, NO_TRANSITION, 0, SBS_SIGNAL_NUM, width, height, input_resolution)
825 return chain.chain, prepare
827 if num == STATIC_SIGNAL_NUM + 2 then
828 local chain = static_chains[false]
830 prepare_overlay_static(chain, t)
832 return chain.chain, prepare
834 if num == OVERLAY_SIGNAL_NUM + 2 then
836 -- prepare_overlay(overlay_chain_lq, t)
838 return overlay_chain_lq, prepare
842 -- This is broken, of course (even for positive numbers), but Lua doesn't give us access to real rounding.
844 return math.floor(x + 0.5)
847 function lerp(a, b, t)
848 return a + (b - a) * t
851 function lerp_pos(a, b, t)
853 x0 = lerp(a.x0, b.x0, t),
854 y0 = lerp(a.y0, b.y0, t),
855 x1 = lerp(a.x1, b.x1, t),
856 y1 = lerp(a.y1, b.y1, t)
860 function pos_from_top_left(x, y, width, height, screen_width, screen_height)
861 local xs = screen_width / 1280.0
862 local ys = screen_height / 720.0
866 x1 = round(xs * (x + width)),
867 y1 = round(ys * (y + height))
871 function prepare_sbs_chain(chain, t, transition_type, src_signal, dst_signal, screen_width, screen_height, input_resolution)
872 chain.input0.input:connect_signal(0)
873 chain.input1.input:connect_signal(4)
874 set_neutral_color(chain.input0.wb_effect, neutral_colors[1])
875 set_neutral_color(chain.input1.wb_effect, neutral_colors[5])
877 -- Both inputs are the same size (true side-by-side).
878 local pos0 = pos_from_top_left(1280 - 616 - 16, 186, 616, 347, screen_width, screen_height)
879 local pos1 = pos_from_top_left(16, 186, 616, 347, screen_width, screen_height)
881 local pos_fs = { x0 = 0, y0 = 0, x1 = screen_width, y1 = screen_height }
883 if transition_type == NO_TRANSITION then
885 affine_param = { sx = 1.0, sy = 1.0, tx = 0.0, ty = 0.0 } -- Identity.
887 -- Zooming to/from SBS view into or out of a single view.
888 assert(transition_type == ZOOM_TRANSITION)
890 if src_signal == SBS_SIGNAL_NUM then
894 assert(dst_signal == SBS_SIGNAL_NUM)
899 if signal == INPUT0_SIGNAL_NUM then
900 affine_param = find_affine_param(pos0, lerp_pos(pos0, pos_fs, real_t))
901 elseif signal == INPUT4_SIGNAL_NUM then
902 affine_param = find_affine_param(pos1, lerp_pos(pos1, pos_fs, real_t))
906 -- NOTE: input_resolution is not 1-indexed, unlike usual Lua arrays.
907 place_rectangle_with_affine(chain.input0.resample_effect, chain.input0.resize_effect, chain.input0.padding_effect, pos0, affine_param, screen_width, screen_height, input_resolution[0].width, input_resolution[0].height)
908 place_rectangle_with_affine(chain.input1.resample_effect, chain.input1.resize_effect, chain.input1.padding_effect, pos1, affine_param, screen_width, screen_height, input_resolution[1].width, input_resolution[1].height)
911 -- Find the transformation that changes the first rectangle to the second one.
912 function find_affine_param(a, b)
913 local sx = (b.x1 - b.x0) / (a.x1 - a.x0)
914 local sy = (b.y1 - b.y0) / (a.y1 - a.y0)
918 tx = b.x0 - a.x0 * sx,
919 ty = b.y0 - a.y0 * sy
923 function place_rectangle_with_affine(resample_effect, resize_effect, padding_effect, pos, aff, screen_width, screen_height, input_width, input_height)
924 local x0 = pos.x0 * aff.sx + aff.tx
925 local x1 = pos.x1 * aff.sx + aff.tx
926 local y0 = pos.y0 * aff.sy + aff.ty
927 local y1 = pos.y1 * aff.sy + aff.ty
929 place_rectangle(resample_effect, resize_effect, padding_effect, x0, y0, x1, y1, screen_width, screen_height, input_width, input_height)
932 function place_rectangle(resample_effect, resize_effect, padding_effect, x0, y0, x1, y1, screen_width, screen_height, input_width, input_height)
938 padding_effect:set_int("width", screen_width)
939 padding_effect:set_int("height", screen_height)
942 if x0 > screen_width or x1 < 0.0 or y0 > screen_height or y1 < 0.0 then
943 if resample_effect ~= nil then
944 resample_effect:set_int("width", 1)
945 resample_effect:set_int("height", 1)
946 resample_effect:set_float("zoom_x", screen_width)
947 resample_effect:set_float("zoom_y", screen_height)
949 resize_effect:set_int("width", 1)
950 resize_effect:set_int("height", 1)
952 padding_effect:set_int("left", screen_width + 100)
953 padding_effect:set_int("top", screen_height + 100)
959 srcx0 = -x0 / (x1 - x0)
963 srcy0 = -y0 / (y1 - y0)
966 if x1 > screen_width then
967 srcx1 = (screen_width - x0) / (x1 - x0)
970 if y1 > screen_height then
971 srcy1 = (screen_height - y0) / (y1 - y0)
975 if resample_effect ~= nil then
976 -- High-quality resampling.
977 local x_subpixel_offset = x0 - math.floor(x0)
978 local y_subpixel_offset = y0 - math.floor(y0)
980 -- Resampling must be to an integral number of pixels. Round up,
981 -- and then add an extra pixel so we have some leeway for the border.
982 local width = math.ceil(x1 - x0) + 1
983 local height = math.ceil(y1 - y0) + 1
984 resample_effect:set_int("width", width)
985 resample_effect:set_int("height", height)
987 -- Correct the discrepancy with zoom. (This will leave a small
988 -- excess edge of pixels and subpixels, which we'll correct for soon.)
989 local zoom_x = (x1 - x0) / (width * (srcx1 - srcx0))
990 local zoom_y = (y1 - y0) / (height * (srcy1 - srcy0))
991 resample_effect:set_float("zoom_x", zoom_x)
992 resample_effect:set_float("zoom_y", zoom_y)
993 resample_effect:set_float("zoom_center_x", 0.0)
994 resample_effect:set_float("zoom_center_y", 0.0)
996 -- Padding must also be to a whole-pixel offset.
997 padding_effect:set_int("left", math.floor(x0))
998 padding_effect:set_int("top", math.floor(y0))
1000 -- Correct _that_ discrepancy by subpixel offset in the resampling.
1001 resample_effect:set_float("left", srcx0 * input_width - x_subpixel_offset / zoom_x)
1002 resample_effect:set_float("top", srcy0 * input_height - y_subpixel_offset / zoom_y)
1004 -- Finally, adjust the border so it is exactly where we want it.
1005 padding_effect:set_float("border_offset_left", x_subpixel_offset)
1006 padding_effect:set_float("border_offset_right", x1 - (math.floor(x0) + width))
1007 padding_effect:set_float("border_offset_top", y_subpixel_offset)
1008 padding_effect:set_float("border_offset_bottom", y1 - (math.floor(y0) + height))
1010 -- Lower-quality simple resizing.
1011 local width = round(x1 - x0)
1012 local height = round(y1 - y0)
1013 resize_effect:set_int("width", width)
1014 resize_effect:set_int("height", height)
1016 -- Padding must also be to a whole-pixel offset.
1017 padding_effect:set_int("left", math.floor(x0))
1018 padding_effect:set_int("top", math.floor(y0))
1022 function prepare_overlay_live(chain, t, extra_alpha_factor)
1023 if chain.overlay then
1024 local tt = calc_fade_progress(t, overlay_transition_start, overlay_transition_end)
1025 overlay_alpha = overlay_alpha_src + tt * (overlay_alpha_dst - overlay_alpha_src)
1026 overlay_alpha = overlay_alpha * extra_alpha_factor
1027 --print("overlay_alpha=" .. overlay_alpha .. " [" .. overlay_alpha_src .. "," .. overlay_alpha_dst .. "]@" .. tt)
1028 if t > overlay_transition_end and overlay_alpha_dst == 0.0 then
1029 overlay_enabled = false -- Takes effect next frame.
1030 -- print("Turning off overlay")
1032 chain.overlay.multiply_effect:set_vec4("factor", overlay_alpha, overlay_alpha, overlay_alpha, overlay_alpha)
1036 function prepare_overlay_static(chain)
1037 if chain.overlay then
1038 chain.overlay.multiply_effect:set_vec4("factor", 1.0, 1.0, 1.0, 1.0)
1042 function set_neutral_color(effect, color)
1043 effect:set_vec3("neutral_color", color[1], color[2], color[3])
1046 function set_neutral_color_from_signal(effect, signal)
1047 if is_plain_signal(signal) then
1048 set_neutral_color(effect, neutral_colors[signal - INPUT0_SIGNAL_NUM + 1])
1052 function calc_zoom_progress(t)
1053 if t < transition_start then
1055 elseif t > transition_end then
1058 local tt = (t - transition_start) / (transition_end - transition_start)
1060 return math.sin(tt * 3.14159265358 * 0.5)
1064 function calc_fade_progress(t, transition_start, transition_end)
1065 local tt = (t - transition_start) / (transition_end - transition_start)
1068 elseif tt > 1.0 then
1072 -- Make the fade look maybe a tad more natural, by pumping it
1073 -- through a sigmoid function.
1074 tt = 10.0 * tt - 5.0
1075 tt = 1.0 / (1.0 + math.exp(-tt))
1081 { "Reload overlay", reload_cef }