-- to the next.
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
-- in a free set of chosen parameters.
function make_cartesian_product(parms, callback)
{true, false}, -- input0_scale
{"static", "live", "livedeint"}, -- input1_type
{true, false}, -- input1_scale
- {true, false} -- hq
+ {true} -- hq
}, function(input0_type, input0_scale, input1_type, input1_scale, hq)
local input0_live = (input0_type ~= "static")
local input1_live = (input1_type ~= "static")
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()
return 4
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
+ 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(signal_num)
+ if last_resolution[signal_num] then
+ if last_resolution[signal_num].height == 0 or
+ last_resolution[signal_num].height == 525 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
+ else
+ return "no signal"
+ end
+end
+
+-- API ENTRY POINT
-- Returns the name for each additional channel (starting from 2).
--- Called only once for each channel, at the start of the program.
+-- Called at the start of the program, and then each frame for live
+-- channels in case they change resolution.
function channel_name(channel)
if channel == 2 then
- return "Input 1"
+ return "Input 1 (" .. get_channel_resolution(0) .. ")"
elseif channel == 3 then
- return "Input 2"
+ return "Input 2 (" .. get_channel_resolution(1) .. ")"
elseif channel == 4 then
return "Side-by-side"
elseif channel == 5 then
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
-- NOTE: The chain returned must be finalized with the Y'CbCr flag
-- if and only if num==0.
function get_chain(num, t, width, height, signals)
+ local input_resolution = {}
+ for signal_num=0,1 do
+ 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
+
if num == 0 then -- Live.
if live_signal_num == INPUT0_SIGNAL_NUM or live_signal_num == INPUT1_SIGNAL_NUM then -- Plain input.
local input_type = get_input_type(signals, live_signal_num)
local chain = sbs_chains[input0_type][input1_type][true]
prepare = function()
if t < transition_start then
- prepare_sbs_chain(chain, zoom_src, width, height)
+ prepare_sbs_chain(chain, zoom_src, width, height, input_resolution)
elseif t > transition_end then
- prepare_sbs_chain(chain, zoom_dst, width, height)
+ prepare_sbs_chain(chain, zoom_dst, width, height, input_resolution)
else
local tt = (t - transition_start) / (transition_end - transition_start)
-- Smooth it a bit.
tt = math.sin(tt * 3.14159265358 * 0.5)
- prepare_sbs_chain(chain, zoom_src + (zoom_dst - zoom_src) * tt, width, height)
+ prepare_sbs_chain(chain, zoom_src + (zoom_dst - zoom_src) * tt, width, height, input_resolution)
end
end
return chain.chain, prepare
local input1_type = get_input_type(signals, INPUT1_SIGNAL_NUM)
local chain = sbs_chains[input0_type][input1_type][false]
prepare = function()
- prepare_sbs_chain(chain, 0.0, width, height)
+ prepare_sbs_chain(chain, 0.0, width, height, input_resolution)
end
return chain.chain, prepare
end
return a + (b - a) * t
end
-function prepare_sbs_chain(chain, t, screen_width, screen_height)
+function prepare_sbs_chain(chain, t, screen_width, screen_height, input_resolution)
chain.input0.input:connect_signal(0)
chain.input1.input:connect_signal(1)
set_neutral_color(chain.input0.wb_effect, input0_neutral_color)
bottom1 = bottom1 * scale0 + ty0
left1 = left1 * scale0 + tx0
right1 = right1 * scale0 + tx0
- place_rectangle(chain.input0.resample_effect, chain.input0.resize_effect, chain.input0.padding_effect, left0, top0, right0, bottom0, screen_width, screen_height, 1280, 720)
- place_rectangle(chain.input1.resample_effect, chain.input1.resize_effect, chain.input1.padding_effect, left1, top1, right1, bottom1, screen_width, screen_height, 1280, 720)
+ place_rectangle(chain.input0.resample_effect, chain.input0.resize_effect, chain.input0.padding_effect, left0, top0, right0, bottom0, screen_width, screen_height, input_resolution[0].width, input_resolution[0].height)
+ place_rectangle(chain.input1.resample_effect, chain.input1.resize_effect, chain.input1.padding_effect, left1, top1, right1, bottom1, screen_width, screen_height, input_resolution[1].width, input_resolution[1].height)
end
function set_neutral_color(effect, color)
projects / nageru / blobdiff