local FADE_SIGNAL_NUM = 4
-- Last width/height/resolution for each channel, if we have it.
+-- Note that unlike the values we get from Nageru, the resolution is per
+-- frame and not per field, since we deinterlace.
local last_resolution = {}
-- Utility function to help creating many similar chains that can differ
end
function needs_scale(signals, signal_num, width, height)
+ if signal_num == STATIC_SIGNAL_NUM then
+ -- We assume this is already correctly scaled at load time.
+ return false
+ end
+ assert(signal_num == INPUT0_SIGNAL_NUM or signal_num == INPUT1_SIGNAL_NUM)
return (signals:get_width(signal_num) ~= width or signals:get_height(signal_num) ~= height)
end
end
end
+-- API ENTRY POINT
-- 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()
function get_frame_rate(signal_num)
local nom = last_resolution[signal_num].frame_rate_nom
local den = last_resolution[signal_num].frame_rate_den
- if last_resolution[signal_num].interlaced then
- nom = nom * 2
- end
if nom % den == 0 then
return nom / den
else
- return string.format("%.2f", num / den)
+ return string.format("%.2f", nom / den)
end
end
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" .. get_frame_rate(signal_num)
+ return last_resolution[signal_num].height .. "i" .. get_frame_rate(signal_num)
else
return last_resolution[signal_num].height .. "p" .. get_frame_rate(signal_num)
end
end
end
+-- API ENTRY POINT
-- Returns the name for each additional channel (starting from 2).
-- Called at the start of the program, and then each frame for live
-- channels in case they change resolution.
end
end
+-- API ENTRY POINT
+-- Returns, given a channel number, which signal it corresponds to (starting from 0).
+-- Should return -1 if the channel does not correspond to a simple signal.
+-- Called once for each channel, at the start of the program.
+-- Will never be called for live (0) or preview (1).
+function channel_signal(channel)
+ if channel == 2 then
+ return 0
+ elseif channel == 3 then
+ return 1
+ else
+ return -1
+ end
+end
+
+-- API ENTRY POINT
-- Returns if a given channel supports setting white balance (starting from 2).
-- Called only once for each channel, at the start of the program.
function supports_set_wb(channel)
return channel == 2 or channel == 3
end
+-- API ENTRY POINT
-- Gets called with a new gray point when the white balance is changing.
-- The color is in linear light (not sRGB gamma).
function set_wb(channel, red, green, blue)
end
end
+-- API ENTRY POINT
-- Called every frame.
function get_transitions(t)
finish_transitions(t)
end
end
+-- API ENTRY POINT
function channel_clicked(num)
preview_signal_num = num
end
+-- API ENTRY POINT
-- Called every frame. Get the chain for displaying at input <num>,
-- where 0 is live, 1 is preview, 2 is the first channel to display
-- in the bottom bar, and so on up to num_channels()+1. t is the
function get_chain(num, t, width, height, signals)
local input_resolution = {}
for signal_num=0,1 do
- input_resolution[signal_num] = {
+ local res = {
width = signals:get_width(signal_num),
height = signals:get_height(signal_num),
interlaced = signals:get_interlaced(signal_num),
frame_rate_nom = signals:get_frame_rate_nom(signal_num),
frame_rate_den = signals:get_frame_rate_den(signal_num)
}
+
+ if res.interlaced then
+ -- Convert height from frame height to field height.
+ -- (Needed for e.g. place_rectangle.)
+ res.height = res.height * 2
+
+ -- Show field rate instead of frame rate; really for cosmetics only
+ -- (and actually contrary to EBU recommendations, although in line
+ -- with typical user expectations).
+ res.frame_rate_nom = res.frame_rate_nom * 2
+ end
+
+ input_resolution[signal_num] = res
end
last_resolution = input_resolution