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
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
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
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