local ZOOM_TRANSITION = 1 -- Also for slides.
local FADE_TRANSITION = 2
--- Last width/height/frame rate 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 = {}
-
function make_sbs_input(scene)
return {
input = scene:add_input(),
static_scene:add_input(static_image) -- Note: Locks this input to images only.
static_scene:finalize()
--- 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()
- return 4
-end
+-- Set some global state.
+Nageru.set_num_channels(4) -- Can only be called at the start of the program.
+Nageru.set_channel_name(SBS_SIGNAL_NUM + 2, "Side-by-side")
+Nageru.set_channel_name(STATIC_SIGNAL_NUM + 2, "Static picture")
function is_plain_signal(num)
return num == INPUT0_SIGNAL_NUM or num == INPUT1_SIGNAL_NUM
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)
- local res = last_resolution[signal_num]
- if (not res) or not res.is_connected then
- return "disconnected"
- end
- if 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(res)
- local nom = res.frame_rate_nom
- local den = res.frame_rate_den
- if nom % den == 0 then
- return nom / den
- else
- return string.format("%.2f", nom / den)
- end
-end
-
--- Helper function to write e.g. “720p60”.
-function get_channel_resolution_raw(res)
- if res.interlaced then
- return res.height .. "i" .. get_frame_rate(res)
- else
- return res.height .. "p" .. get_frame_rate(res)
- 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.
-function channel_name(channel)
- local signal_num = channel - 2
- if is_plain_signal(signal_num) then
- return "Input " .. (signal_num + 1) .. " (" .. get_channel_resolution(signal_num) .. ")"
- elseif signal_num == SBS_SIGNAL_NUM then
- return "Side-by-side"
- elseif signal_num == STATIC_SIGNAL_NUM then
- return "Static picture"
- 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
end
input_resolution[signal_num] = res
+
+ local text_res = signals:get_human_readable_resolution(signal_num)
+ Nageru.set_channel_name(signal_num + 2, "Input " .. (signal_num + 1) .. " (" .. text_res .. ")")
end
- last_resolution = input_resolution
if num == 0 then -- Live.
finish_transitions(t)