1 -- Nageru theme for TFK mini-tournament 2017, 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, hq)
187 local input = chain:add_live_input(not deint, deint) -- Override bounce only if not deinterlacing.
188 input:connect_signal(signal)
190 local resample_effect = nil
191 local resize_effect = nil
193 resample_effect = chain:add_effect(ResampleEffect.new())
195 resize_effect = chain:add_effect(ResizeEffect.new())
197 local wb_effect = chain:add_effect(WhiteBalanceEffect.new())
199 local padding_effect = chain:add_effect(IntegralPaddingEffect.new())
203 wb_effect = wb_effect,
204 resample_effect = resample_effect,
205 resize_effect = resize_effect,
206 padding_effect = padding_effect
210 -- Side-by-side chains.
211 function make_sbs_chain(input0_type, input0_overlay, input1_type, hq)
212 local chain = EffectChain.new(16, 9)
214 local input0 = make_sbs_input(chain, INPUT0_SIGNAL_NUM, input0_type == "livedeint", hq)
215 local input1 = make_sbs_input(chain, INPUT1_SIGNAL_NUM, input1_type == "livedeint", hq)
217 -- FIXME: input0_overlay
219 input0.padding_effect:set_vec4("border_color", 0.0, 0.0, 0.0, 1.0)
220 input1.padding_effect:set_vec4("border_color", 0.0, 0.0, 0.0, 0.0)
222 chain:add_effect(OverlayEffect.new(), input0.padding_effect, input1.padding_effect)
233 -- Make all possible combinations of side-by-side chains.
234 local sbs_chains = make_cartesian_product({
235 {"live", "livedeint"}, -- input0_type
236 {true, false}, -- input0_overlay
237 {"live", "livedeint"}, -- input1_type
239 }, function(input0_type, input0_overlay, input1_type, hq)
240 return make_sbs_chain(input0_type, input0_overlay, input1_type, hq)
243 -- A chain to show a single input on screen.
244 function make_simple_chain(input_deint, input_scale, has_overlay, hq)
245 local chain = EffectChain.new(16, 9)
247 local input = chain:add_live_input(false, input_deint)
248 input:connect_signal(0) -- First input card. Can be changed whenever you want.
250 local resample_effect, resize_effect
253 resample_effect = chain:add_effect(ResampleEffect.new())
255 resize_effect = chain:add_effect(ResizeEffect.new())
259 local wb_effect = chain:add_effect(WhiteBalanceEffect.new())
260 local overlay = possibly_make_overlay(has_overlay, chain, wb_effect)
267 wb_effect = wb_effect,
268 resample_effect = resample_effect,
269 resize_effect = resize_effect,
274 -- Make all possible combinations of single-input chains.
275 local simple_chains = make_cartesian_product({
276 {"live", "livedeint"}, -- input_type
277 {true, false}, -- input_scale
278 {true, false}, -- has_overlay
280 }, function(input_type, input_scale, has_overlay, hq)
281 local input_deint = (input_type == "livedeint")
282 return make_simple_chain(input_deint, input_scale, has_overlay, hq)
285 -- A chain to show a single static picture on screen. Never with CasparCG overlay.
286 local static_chains = make_cartesian_product({
289 local chain = EffectChain.new(16, 9)
290 local chain_input = chain:add_effect(ImageInput.new("tfk_pause.png"))
298 -- A chain to show the overlay and nothing more. LQ only,
299 -- since it is not a valid live signal.
300 local overlay_chain_lq = EffectChain.new(16, 9)
301 local overlay_chain_lq_input = overlay_chain_lq:add_html_input(cef_input)
302 overlay_chain_lq:finalize(false)
304 -- Used for indexing into the tables of chains.
305 function get_input_type(signals, signal_num)
306 if signal_num == STATIC_SIGNAL_NUM then
308 elseif signals:get_interlaced(signal_num) then
315 function needs_scale(signals, signal_num, width, height)
316 if signal_num == STATIC_SIGNAL_NUM then
317 -- We assume this is already correctly scaled at load time.
320 assert(is_plain_signal(signal_num))
321 return (signals:get_width(signal_num) ~= width or signals:get_height(signal_num) ~= height)
324 function set_scale_parameters_if_needed(chain_or_input, width, height)
325 if chain_or_input.resample_effect then
326 chain_or_input.resample_effect:set_int("width", width)
327 chain_or_input.resample_effect:set_int("height", height)
328 elseif chain_or_input.resize_effect then
329 chain_or_input.resize_effect:set_int("width", width)
330 chain_or_input.resize_effect:set_int("height", height)
335 -- Returns the number of outputs in addition to the live (0) and preview (1).
336 -- Called only once, at the start of the program.
337 function num_channels()
338 return NUM_CAMERAS + 3 -- sbs, static picture and overlay
341 function is_plain_signal(num)
342 return num >= INPUT0_SIGNAL_NUM and num <= INPUT4_SIGNAL_NUM
345 -- Helper function to write e.g. “720p60”. The difference between this
346 -- and get_channel_resolution_raw() is that this one also can say that
347 -- there's no signal.
348 function get_channel_resolution(signal_num)
349 res = last_resolution[signal_num]
350 if (not res) or not res.is_connected then
351 return "disconnected"
353 if res.height <= 0 then
356 if not res.has_signal then
357 if res.height == 525 then
358 -- Special mode for the USB3 cards.
361 return get_channel_resolution_raw(res) .. ", no signal"
363 return get_channel_resolution_raw(res)
367 -- Helper function to write e.g. “60” or “59.94”.
368 function get_frame_rate(res)
369 local nom = res.frame_rate_nom
370 local den = res.frame_rate_den
371 if nom % den == 0 then
374 return string.format("%.2f", nom / den)
378 -- Helper function to write e.g. “720p60”.
379 function get_channel_resolution_raw(res)
380 if res.interlaced then
381 return res.height .. "i" .. get_frame_rate(res)
383 return res.height .. "p" .. get_frame_rate(res)
388 -- Returns the name for each additional channel (starting from 2).
389 -- Called at the start of the program, and then each frame for live
390 -- channels in case they change resolution.
391 function channel_name(channel)
392 local signal_num = channel - 2
393 if signal_num == INPUT0_SIGNAL_NUM then
394 return "Main (" .. get_channel_resolution(signal_num) .. ")"
395 elseif signal_num == INPUT1_SIGNAL_NUM then
396 return "Secondary (" .. get_channel_resolution(signal_num) .. ")"
397 elseif signal_num == INPUT2_SIGNAL_NUM then
398 return "Goal L (" .. get_channel_resolution(signal_num) .. ")"
399 elseif signal_num == INPUT3_SIGNAL_NUM then
400 return "Goal R (" .. get_channel_resolution(signal_num) .. ")"
401 elseif signal_num == INPUT4_SIGNAL_NUM then
402 return "Commentators (" .. get_channel_resolution(signal_num) .. ")"
403 elseif signal_num == SBS_SIGNAL_NUM then
404 return "Side-by-side"
405 elseif signal_num == STATIC_SIGNAL_NUM then
406 return "Static picture"
407 elseif signal_num == OVERLAY_SIGNAL_NUM then
413 -- Returns, given a channel number, which signal it corresponds to (starting from 0).
414 -- Should return -1 if the channel does not correspond to a simple signal.
415 -- (The information is used for whether right-click on the channel should bring up
416 -- an input selector or not.)
417 -- Called once for each channel, at the start of the program.
418 -- Will never be called for live (0) or preview (1).
419 function channel_signal(channel)
420 if is_plain_signal(channel - 2) then
428 -- Called every frame. Returns the color (if any) to paint around the given
429 -- channel. Returns a CSS color (typically to mark live and preview signals);
430 -- "transparent" is allowed.
431 -- Will never be called for live (0) or preview (1).
432 function channel_color(channel)
433 if transition_type ~= NO_TRANSITION then
434 if channel_involved_in(channel, transition_src_signal) or
435 channel_involved_in(channel, transition_dst_signal) then
439 if channel_involved_in(channel, live_signal_num) then
443 if channel_involved_in(channel, preview_signal_num) then
449 function channel_involved_in(channel, signal_num)
450 if is_plain_signal(signal_num) then
451 return channel == (signal_num + 2)
453 if signal_num == STATIC_SIGNAL_NUM then
454 return (channel == NUM_CAMERAS)
460 -- Returns if a given channel supports setting white balance (starting from 2).
461 -- Called only once for each channel, at the start of the program.
462 function supports_set_wb(channel)
463 return is_plain_signal(channel - 2)
467 -- Gets called with a new gray point when the white balance is changing.
468 -- The color is in linear light (not sRGB gamma).
469 function set_wb(channel, red, green, blue)
470 if is_plain_signal(channel - 2) then
471 neutral_colors[channel - 2 + 1] = { red, green, blue }
475 function finish_transitions(t)
476 if transition_type ~= NO_TRANSITION and t >= transition_end then
477 live_signal_num = transition_dst_signal
478 transition_type = NO_TRANSITION
481 -- Disable the overlay if it is no longer visible.
482 if overlay_enabled and t > overlay_transition_end and overlay_alpha_dst == 0.0 then
483 overlay_enabled = false
484 print("Turning off overlay")
488 function in_transition(t)
489 return t >= transition_start and t <= transition_end
493 -- Called every frame.
494 function get_transitions(t)
495 if preview_signal_num == OVERLAY_SIGNAL_NUM then
496 if t < overlay_transition_end then
500 if overlay_enabled then
501 return {"Overlay off", "", "Fade ovl out"}
503 return {"Overlay on", "", "Fade ovl in"}
507 if in_transition(t) then
508 -- Transition already in progress, the only thing we can do is really
509 -- cut to the preview. (TODO: Make an “abort” and/or “finish”, too?)
513 if live_signal_num == preview_signal_num then
514 -- No transitions possible.
518 if (is_plain_signal(live_signal_num) or live_signal_num == STATIC_SIGNAL_NUM) and
519 (is_plain_signal(preview_signal_num) or preview_signal_num == STATIC_SIGNAL_NUM) then
520 return {"Cut", "", "Fade"}
524 if live_signal_num == SBS_SIGNAL_NUM and is_plain_signal(preview_signal_num) then
525 return {"Cut", "Zoom in"}
526 elseif is_plain_signal(live_signal_num) and preview_signal_num == SBS_SIGNAL_NUM then
527 return {"Cut", "Zoom out"}
533 function swap_preview_live()
534 local temp = live_signal_num
535 live_signal_num = preview_signal_num
536 preview_signal_num = temp
539 function start_transition(type_, t, duration)
541 transition_end = t + duration
542 transition_type = type_
543 transition_src_signal = live_signal_num
544 transition_dst_signal = preview_signal_num
549 -- Called when the user clicks a transition button.
550 function transition_clicked(num, t)
551 if preview_signal_num == OVERLAY_SIGNAL_NUM then
554 overlay_transition_start = -2.0
555 overlay_transition_end = -1.0
556 if overlay_enabled then
557 overlay_enabled = false
558 overlay_alpha_src = 0.0
559 overlay_alpha_dst = 0.0
561 overlay_enabled = true
562 overlay_alpha_src = 1.0
563 overlay_alpha_dst = 1.0
567 overlay_transition_start = t
568 overlay_transition_end = t + 1.0
569 if overlay_enabled then
570 overlay_alpha_src = 1.0
571 overlay_alpha_dst = 0.0
573 overlay_alpha_src = 0.0
574 overlay_alpha_dst = 1.0
576 overlay_enabled = true
583 if in_transition(t) then
584 -- Ongoing transition; finish it immediately before the cut.
585 finish_transitions(transition_end)
591 finish_transitions(t)
593 if live_signal_num == preview_signal_num then
598 if is_plain_signal(live_signal_num) and is_plain_signal(preview_signal_num) then
599 -- We can't zoom between these. Just make a cut.
600 io.write("Cutting from " .. live_signal_num .. " to " .. live_signal_num .. "\n")
605 if (live_signal_num == SBS_SIGNAL_NUM and is_plain_signal(preview_signal_num)) or
606 (preview_signal_num == SBS_SIGNAL_NUM and is_plain_signal(live_signal_num)) then
607 start_transition(ZOOM_TRANSITION, t, 1.0)
610 finish_transitions(t)
613 if (live_signal_num ~= preview_signal_num) and
614 (is_plain_signal(live_signal_num) or
615 live_signal_num == STATIC_SIGNAL_NUM) and
616 (is_plain_signal(preview_signal_num) or
617 preview_signal_num == STATIC_SIGNAL_NUM) then
618 start_transition(FADE_TRANSITION, t, 1.0)
620 -- Fades involving SBS are ignored (we have no chain for it).
626 function channel_clicked(num)
627 preview_signal_num = num
630 function get_fade_chain(signals, t, width, height, input_resolution)
631 local input0_type = get_input_type(signals, transition_src_signal)
632 local input0_scale = needs_scale(signals, transition_src_signal, width, height)
633 local input1_type = get_input_type(signals, transition_dst_signal)
634 local input1_scale = needs_scale(signals, transition_dst_signal, width, height)
635 local chain = fade_chains[input0_type][input0_scale][input1_type][input1_scale][overlay_enabled][true]
637 if input0_type == "live" or input0_type == "livedeint" then
638 chain.input0.input:connect_signal(transition_src_signal)
639 set_neutral_color_from_signal(chain.input0.wb_effect, transition_src_signal)
641 set_scale_parameters_if_needed(chain.input0, width, height)
642 if input1_type == "live" or input1_type == "livedeint" then
643 chain.input1.input:connect_signal(transition_dst_signal)
644 set_neutral_color_from_signal(chain.input1.wb_effect, transition_dst_signal)
646 set_scale_parameters_if_needed(chain.input1, width, height)
647 local tt = calc_fade_progress(t, transition_start, transition_end)
649 chain.mix_effect:set_float("strength_first", 1.0 - tt)
650 chain.mix_effect:set_float("strength_second", tt)
651 prepare_overlay_live(chain, t)
653 return chain.chain, prepare
656 -- SBS code (live_signal_num == SBS_SIGNAL_NUM, or in a transition to/from it).
657 function get_sbs_chain(signals, t, width, height, input_resolution)
658 local input0_type = get_input_type(signals, INPUT0_SIGNAL_NUM)
659 local input1_type = get_input_type(signals, INPUT1_SIGNAL_NUM)
660 return sbs_chains[input0_type][false][input1_type][true] -- FIXME: overlay is always false?
664 -- Called every frame. Get the chain for displaying at input <num>,
665 -- where 0 is live, 1 is preview, 2 is the first channel to display
666 -- in the bottom bar, and so on up to num_channels()+1. t is the
667 -- current time in seconds. width and height are the dimensions of
668 -- the output, although you can ignore them if you don't need them
669 -- (they're useful if you want to e.g. know what to resample by).
671 -- <signals> is basically an exposed InputState, which you can use to
672 -- query for information about the signals at the point of the current
673 -- frame. In particular, you can call get_width() and get_height()
674 -- for any signal number, and use that to e.g. assist in chain selection.
676 -- You should return two objects; the chain itself, and then a
677 -- function (taking no parameters) that is run just before rendering.
678 -- The function needs to call connect_signal on any inputs, so that
679 -- it gets updated video data for the given frame. (You are allowed
680 -- to switch which input your input is getting from between frames,
681 -- but not calling connect_signal results in undefined behavior.)
682 -- If you want to change any parameters in the chain, this is also
685 -- NOTE: The chain returned must be finalized with the Y'CbCr flag
686 -- if and only if num==0.
687 function get_chain(num, t, width, height, signals)
688 local input_resolution = {}
689 for signal_num=0,(NUM_CAMERAS-1) do
691 width = signals:get_width(signal_num),
692 height = signals:get_height(signal_num),
693 interlaced = signals:get_interlaced(signal_num),
694 has_signal = signals:get_has_signal(signal_num),
695 is_connected = signals:get_is_connected(signal_num),
696 frame_rate_nom = signals:get_frame_rate_nom(signal_num),
697 frame_rate_den = signals:get_frame_rate_den(signal_num)
700 if res.interlaced then
701 -- Convert height from frame height to field height.
702 -- (Needed for e.g. place_rectangle.)
703 res.height = res.height * 2
705 -- Show field rate instead of frame rate; really for cosmetics only
706 -- (and actually contrary to EBU recommendations, although in line
707 -- with typical user expectations).
708 res.frame_rate_nom = res.frame_rate_nom * 2
711 input_resolution[signal_num] = res
713 last_resolution = input_resolution
715 if num == 0 then -- Live.
716 -- See if we're in a transition.
717 finish_transitions(t)
718 if transition_type == ZOOM_TRANSITION then
719 -- Transition in or out of SBS.
720 local chain = get_sbs_chain(signals, t, width, height, input_resolution)
722 prepare_sbs_chain(chain, calc_zoom_progress(t), transition_type, transition_src_signal, transition_dst_signal, width, height, input_resolution)
724 return chain.chain, prepare
725 elseif transition_type == NO_TRANSITION and live_signal_num == SBS_SIGNAL_NUM then
727 local chain = get_sbs_chain(signals, t, width, height, input_resolution)
729 prepare_sbs_chain(chain, 0.0, NO_TRANSITION, 0, SBS_SIGNAL_NUM, width, height, input_resolution)
731 return chain.chain, prepare
732 elseif transition_type == FADE_TRANSITION then
733 return get_fade_chain(signals, t, width, height, input_resolution)
734 elseif is_plain_signal(live_signal_num) then
735 local input_type = get_input_type(signals, live_signal_num)
736 local input_scale = needs_scale(signals, live_signal_num, width, height)
737 local chain = simple_chains[input_type][input_scale][overlay_enabled][true]
739 chain.input:connect_signal(live_signal_num)
740 set_scale_parameters_if_needed(chain, width, height)
741 set_neutral_color_from_signal(chain.wb_effect, live_signal_num)
742 prepare_overlay_live(chain, t)
744 return chain.chain, prepare
745 elseif live_signal_num == STATIC_SIGNAL_NUM then -- Static picture.
746 local chain = static_chains[true]
748 prepare_overlay_live(chain, t)
750 return chain.chain, prepare
756 -- We do not show overlays on the individual preview inputs.
757 -- The M/E preview matches what we'd put live by doing a transition, as always.
758 local show_overlay = false
759 if num == 1 then -- Preview.
760 if preview_signal_num == OVERLAY_SIGNAL_NUM then
761 num = live_signal_num + 2
762 show_overlay = not overlay_enabled
764 if transition_type ~= NO_TRANSITION then
765 num = transition_dst_signal + 2
768 num = preview_signal_num + 2
769 show_overlay = overlay_enabled
773 -- Individual preview inputs (usually without overlay).
774 if is_plain_signal(num - 2) then
775 local signal_num = num - 2
776 local input_type = get_input_type(signals, signal_num)
777 local input_scale = needs_scale(signals, signal_num, width, height)
778 local chain = simple_chains[input_type][input_scale][show_overlay][false]
780 chain.input:connect_signal(signal_num)
781 set_scale_parameters_if_needed(chain, width, height)
782 set_neutral_color(chain.wb_effect, neutral_colors[signal_num + 1])
783 prepare_overlay_static(chain, t)
785 return chain.chain, prepare
787 if num == SBS_SIGNAL_NUM + 2 then
788 local input0_type = get_input_type(signals, INPUT0_SIGNAL_NUM)
789 local input1_type = get_input_type(signals, INPUT1_SIGNAL_NUM)
790 local chain = sbs_chains[input0_type][show_overlay][input1_type][false]
792 prepare_sbs_chain(chain, 0.0, NO_TRANSITION, 0, SBS_SIGNAL_NUM, width, height, input_resolution)
794 return chain.chain, prepare
796 if num == STATIC_SIGNAL_NUM + 2 then
797 local chain = static_chains[false]
799 prepare_overlay_static(chain, t)
801 return chain.chain, prepare
803 if num == OVERLAY_SIGNAL_NUM + 2 then
805 -- prepare_overlay(overlay_chain_lq, t)
807 return overlay_chain_lq, prepare
811 -- This is broken, of course (even for positive numbers), but Lua doesn't give us access to real rounding.
813 return math.floor(x + 0.5)
816 function lerp(a, b, t)
817 return a + (b - a) * t
820 function lerp_pos(a, b, t)
822 x0 = lerp(a.x0, b.x0, t),
823 y0 = lerp(a.y0, b.y0, t),
824 x1 = lerp(a.x1, b.x1, t),
825 y1 = lerp(a.y1, b.y1, t)
829 function pos_from_top_left(x, y, width, height, screen_width, screen_height)
830 local xs = screen_width / 1280.0
831 local ys = screen_height / 720.0
835 x1 = round(xs * (x + width)),
836 y1 = round(ys * (y + height))
840 function prepare_sbs_chain(chain, t, transition_type, src_signal, dst_signal, screen_width, screen_height, input_resolution)
841 chain.input0.input:connect_signal(0)
842 chain.input1.input:connect_signal(1)
843 set_neutral_color(chain.input0.wb_effect, neutral_colors[1])
844 set_neutral_color(chain.input1.wb_effect, neutral_colors[2])
846 -- First input is positioned (16,48) from top-left.
847 -- Second input is positioned (16,48) from the bottom-right.
848 local pos0 = pos_from_top_left(16, 48, 848, 477, screen_width, screen_height)
849 local pos1 = pos_from_top_left(1280 - 384 - 16, 720 - 216 - 48, 384, 216, screen_width, screen_height)
851 local pos_fs = { x0 = 0, y0 = 0, x1 = screen_width, y1 = screen_height }
853 if transition_type == NO_TRANSITION then
855 affine_param = { sx = 1.0, sy = 1.0, tx = 0.0, ty = 0.0 } -- Identity.
857 -- Zooming to/from SBS view into or out of a single view.
858 assert(transition_type == ZOOM_TRANSITION)
860 if src_signal == SBS_SIGNAL_NUM then
864 assert(dst_signal == SBS_SIGNAL_NUM)
869 if signal == INPUT0_SIGNAL_NUM then
870 affine_param = find_affine_param(pos0, lerp_pos(pos0, pos_fs, real_t))
871 elseif signal == INPUT1_SIGNAL_NUM then
872 affine_param = find_affine_param(pos1, lerp_pos(pos1, pos_fs, real_t))
876 -- NOTE: input_resolution is not 1-indexed, unlike usual Lua arrays.
877 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)
878 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)
881 -- Find the transformation that changes the first rectangle to the second one.
882 function find_affine_param(a, b)
883 local sx = (b.x1 - b.x0) / (a.x1 - a.x0)
884 local sy = (b.y1 - b.y0) / (a.y1 - a.y0)
888 tx = b.x0 - a.x0 * sx,
889 ty = b.y0 - a.y0 * sy
893 function place_rectangle_with_affine(resample_effect, resize_effect, padding_effect, pos, aff, screen_width, screen_height, input_width, input_height)
894 local x0 = pos.x0 * aff.sx + aff.tx
895 local x1 = pos.x1 * aff.sx + aff.tx
896 local y0 = pos.y0 * aff.sy + aff.ty
897 local y1 = pos.y1 * aff.sy + aff.ty
899 place_rectangle(resample_effect, resize_effect, padding_effect, x0, y0, x1, y1, screen_width, screen_height, input_width, input_height)
902 function place_rectangle(resample_effect, resize_effect, padding_effect, x0, y0, x1, y1, screen_width, screen_height, input_width, input_height)
908 padding_effect:set_int("width", screen_width)
909 padding_effect:set_int("height", screen_height)
912 if x0 > screen_width or x1 < 0.0 or y0 > screen_height or y1 < 0.0 then
913 if resample_effect ~= nil then
914 resample_effect:set_int("width", 1)
915 resample_effect:set_int("height", 1)
916 resample_effect:set_float("zoom_x", screen_width)
917 resample_effect:set_float("zoom_y", screen_height)
919 resize_effect:set_int("width", 1)
920 resize_effect:set_int("height", 1)
922 padding_effect:set_int("left", screen_width + 100)
923 padding_effect:set_int("top", screen_height + 100)
929 srcx0 = -x0 / (x1 - x0)
933 srcy0 = -y0 / (y1 - y0)
936 if x1 > screen_width then
937 srcx1 = (screen_width - x0) / (x1 - x0)
940 if y1 > screen_height then
941 srcy1 = (screen_height - y0) / (y1 - y0)
945 if resample_effect ~= nil then
946 -- High-quality resampling.
947 local x_subpixel_offset = x0 - math.floor(x0)
948 local y_subpixel_offset = y0 - math.floor(y0)
950 -- Resampling must be to an integral number of pixels. Round up,
951 -- and then add an extra pixel so we have some leeway for the border.
952 local width = math.ceil(x1 - x0) + 1
953 local height = math.ceil(y1 - y0) + 1
954 resample_effect:set_int("width", width)
955 resample_effect:set_int("height", height)
957 -- Correct the discrepancy with zoom. (This will leave a small
958 -- excess edge of pixels and subpixels, which we'll correct for soon.)
959 local zoom_x = (x1 - x0) / (width * (srcx1 - srcx0))
960 local zoom_y = (y1 - y0) / (height * (srcy1 - srcy0))
961 resample_effect:set_float("zoom_x", zoom_x)
962 resample_effect:set_float("zoom_y", zoom_y)
963 resample_effect:set_float("zoom_center_x", 0.0)
964 resample_effect:set_float("zoom_center_y", 0.0)
966 -- Padding must also be to a whole-pixel offset.
967 padding_effect:set_int("left", math.floor(x0))
968 padding_effect:set_int("top", math.floor(y0))
970 -- Correct _that_ discrepancy by subpixel offset in the resampling.
971 resample_effect:set_float("left", srcx0 * input_width - x_subpixel_offset / zoom_x)
972 resample_effect:set_float("top", srcy0 * input_height - y_subpixel_offset / zoom_y)
974 -- Finally, adjust the border so it is exactly where we want it.
975 padding_effect:set_float("border_offset_left", x_subpixel_offset)
976 padding_effect:set_float("border_offset_right", x1 - (math.floor(x0) + width))
977 padding_effect:set_float("border_offset_top", y_subpixel_offset)
978 padding_effect:set_float("border_offset_bottom", y1 - (math.floor(y0) + height))
980 -- Lower-quality simple resizing.
981 local width = round(x1 - x0)
982 local height = round(y1 - y0)
983 resize_effect:set_int("width", width)
984 resize_effect:set_int("height", height)
986 -- Padding must also be to a whole-pixel offset.
987 padding_effect:set_int("left", math.floor(x0))
988 padding_effect:set_int("top", math.floor(y0))
992 function prepare_overlay_live(chain, t)
993 if chain.overlay then
994 local tt = calc_fade_progress(t, overlay_transition_start, overlay_transition_end)
995 overlay_alpha = overlay_alpha_src + tt * (overlay_alpha_dst - overlay_alpha_src)
996 --print("overlay_alpha=" .. overlay_alpha .. " [" .. overlay_alpha_src .. "," .. overlay_alpha_dst .. "]@" .. tt)
997 if t > overlay_transition_end and overlay_alpha_dst == 0.0 then
998 overlay_enabled = false -- Takes effect next frame.
999 -- print("Turning off overlay")
1001 chain.overlay.multiply_effect:set_vec4("factor", overlay_alpha, overlay_alpha, overlay_alpha, overlay_alpha)
1005 function prepare_overlay_static(chain)
1006 if chain.overlay then
1007 chain.overlay.multiply_effect:set_vec4("factor", 1.0, 1.0, 1.0, 1.0)
1011 function set_neutral_color(effect, color)
1012 effect:set_vec3("neutral_color", color[1], color[2], color[3])
1015 function set_neutral_color_from_signal(effect, signal)
1016 if is_plain_signal(signal) then
1017 set_neutral_color(effect, neutral_colors[signal - INPUT0_SIGNAL_NUM + 1])
1021 function calc_zoom_progress(t)
1022 if t < transition_start then
1024 elseif t > transition_end then
1027 local tt = (t - transition_start) / (transition_end - transition_start)
1029 return math.sin(tt * 3.14159265358 * 0.5)
1033 function calc_fade_progress(t, transition_start, transition_end)
1034 local tt = (t - transition_start) / (transition_end - transition_start)
1037 elseif tt > 1.0 then
1041 -- Make the fade look maybe a tad more natural, by pumping it
1042 -- through a sigmoid function.
1043 tt = 10.0 * tt - 5.0
1044 tt = 1.0 / (1.0 + math.exp(-tt))
1050 { "Reload overlay", reload_cef }