return 4
end
+-- Helper function to write e.g. “720p60”. The difference between this
+-- and get_channel_resolution_raw() is that this one also can say that
+-- there's no signal.
+function get_channel_resolution(signal_num)
+ res = last_resolution[signal_num]
+ if (not res) or res.height <= 0 then
+ return "no signal"
+ end
+ if not res.has_signal then
+ if res.height == 525 then
+ -- Special mode for the USB3 cards.
+ return "no signal"
+ end
+ return get_channel_resolution_raw(res) .. ", no signal"
+ else
+ return get_channel_resolution_raw(res)
+ end
+end
+
-- Helper function to write e.g. “60” or “59.94”.
-function get_frame_rate(signal_num)
- local nom = last_resolution[signal_num].frame_rate_nom
- local den = last_resolution[signal_num].frame_rate_den
+function get_frame_rate(res)
+ local nom = res.frame_rate_nom
+ local den = res.frame_rate_den
if nom % den == 0 then
return nom / den
else
end
-- Helper function to write e.g. “720p60”.
-function get_channel_resolution(signal_num)
- if last_resolution[signal_num] then
- if not last_resolution[signal_num].has_signal then
- return "no signal"
- elseif last_resolution[signal_num].interlaced then
- 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_channel_resolution_raw(res)
+ if res.interlaced then
+ return res.height .. "i" .. get_frame_rate(res)
else
- return "no signal"
+ return res.height .. "p" .. get_frame_rate(res)
end
end
end
end
+-- API ENTRY POINT
+-- Called every frame. Returns the color (if any) to paint around the given
+-- channel. Returns a CSS color (typically to mark live and preview signals);
+-- "transparent" is allowed.
+-- Will never be called for live (0) or preview (1).
+function channel_color(channel)
+ if channel_involved_in(channel, live_signal_num) then
+ return "#f00"
+ end
+ if channel_involved_in(channel, preview_signal_num) then
+ return "#0f0"
+ end
+ return "transparent"
+end
+
+function channel_involved_in(channel, signal_num)
+ if signal_num == INPUT0_SIGNAL_NUM then
+ return channel == 2
+ end
+ if signal_num == INPUT1_SIGNAL_NUM then
+ return channel == 3
+ end
+ if signal_num == SBS_SIGNAL_NUM then
+ return (channel == 2 or channel == 3)
+ end
+ if signal_num == STATIC_SIGNAL_NUM then
+ return (channel == 5)
+ end
+ if signal_num == FADE_SIGNAL_NUM then
+ return (channel_involved_in(channel, fade_src_signal) or
+ channel_involved_in(channel, fade_dst_signal))
+ end
+ return false
+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.
end
-- API ENTRY POINT
--- Called when the user clicks a transition button. For our case,
--- we only do cuts, so we ignore the parameters; just switch live and preview.
+-- Called when the user clicks a transition button.
function transition_clicked(num, t)
if num == 0 then
-- Cut.
function calc_fade_progress(t, transition_start, transition_end)
local tt = (t - transition_start) / (transition_end - transition_start)
if tt < 0.0 then
- tt = 0.0
+ return 0.0
elseif tt > 1.0 then
- tt = 1.0
+ return 1.0
end
-- Make the fade look maybe a tad more natural, by pumping it