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node.lua
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node.lua
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gl.setup(NATIVE_WIDTH, NATIVE_HEIGHT)
node.alias "*" -- catch all communication
util.no_globals()
math.randomseed(os.time())
local json = require "json"
local loader = require "loader"
local helper = require "helper"
local placement = require "placement"
local easing = require "easing"
local min, max, abs, floor, ceil = math.min, math.max, math.abs, math.floor, math.ceil
local font_regl = resource.load_font "default-font.ttf"
local font_bold = resource.load_font "default-font-bold.ttf"
local font_7seg = resource.load_font "7segment.ttf"
local colored = resource.create_shader[[
uniform sampler2D Texture;
varying vec2 TexCoord;
uniform vec4 color;
void main() {
gl_FragColor = texture2D(Texture, TexCoord) * color;
}
]]
local white_pixel = resource.create_colored_texture(1,1,1,1)
local function log(system, format, ...)
return print(string.format("[%s] " .. format, system, ...))
end
local function permute(tab)
for i = 1, #tab do
local j = math.random(i, #tab)
tab[i], tab[j] = tab[j], tab[i]
end
end
local function json_nullify(val)
if val == json.null then
return
else
return val
end
end
local function startswith(str, prefix)
return str:sub(1, #prefix) == prefix
end
local function Music()
local asset_name = nil
local music = nil
node.event("config_updated", function(config)
log("music", "updating music config settings")
if config.music.asset_id == "mute.mp4" then
if music then
music:dispose()
end
asset_name = nil
music = nil
elseif config.music.asset_name ~= asset_name then
if music then
music:dispose()
end
asset_name = config.music.asset_name
music = resource.load_video{
file = config.music.asset_name,
looped = true,
audio = true,
raw = true,
}
end
end)
end
local music = Music()
local function TCPClients()
local clients = {}
local handlers = {}
node.event("connect", function(client, path)
log("tcpclient", "new tcp client for %s", path)
clients[client] = {
path = path;
send = function(...)
node.client_write(client, ...)
end
}
end)
node.event("input", function(line, client)
local cinfo = clients[client]
if handlers[cinfo.path] then
handlers[cinfo.path](line)
end
end)
node.event("disconnect", function(client)
clients[client] = nil
end)
local function send(path, ...)
for client, cinfo in pairs(clients) do
if cinfo.path == path then
cinfo.send(...)
end
end
end
local function add_handler(path, handler)
handlers[path] = handler
end
return {
send = send;
add_handler = add_handler;
}
end
local tcp_clients = TCPClients()
local function Screen()
local placer
local rotation
local frame_time = 1/60
pcall(function()
local fps, swap_interval = sys.get_ext("screen").get_display_info()
frame_time = 1 / fps * swap_interval
log("screen", "detected frame delay is %f", frame_time)
end)
node.event("config_updated", function(config)
rotation = config.rotation
local is_portrait = rotation == 90 or rotation == 270
local width, height = config.resolution[1], config.resolution[2]
log("screen", "configured content resolution is %dx%d", width, height)
local surface = {
width = width,
height = height,
}
local target = {
x = 0,
y = 0,
width = NATIVE_WIDTH,
height = NATIVE_HEIGHT,
rotation = rotation,
}
if is_portrait then
surface.width, surface.height = surface.height, surface.width
end
placer = placement.Screen(target, surface)
end)
local function setup()
return placer.setup()
end
local function place_video(...)
return placer.place(...)
end
local function set_scissor(...)
return placer.scissor(...)
end
local function get_rotation()
return rotation
end
return {
setup = setup;
place_video = place_video;
set_scissor = set_scissor;
frame_time = frame_time;
get_rotation = get_rotation;
}
end
local screen = Screen()
local function FontCache()
local fonts = {}
local function get(filename)
local font = fonts[filename]
if not font then
font = {
obj = resource.load_font(filename),
}
fonts[filename] = font
end
font.lru = sys.now()
return font.obj
end
local function tick()
for filename, font in pairs(fonts) do
if sys.now() - font.lru > 300 then
log("fontcache", "purging font %s", filename)
fonts[filename] = nil
end
end
end
return {
get = get;
tick = tick;
}
end
local FontCache = FontCache()
local error_img = resource.create_colored_texture(1,0,0,1)
local function ImageCache()
local images = {}
local get, register
function get(asset_name, keep)
if not images[asset_name] then
register(asset_name, keep)
end
local image = images[asset_name]
if not image then
return error_img
end
if not image.obj then
image.obj = resource.load_image{
file = image.file,
fastload = true,
}
end
image.lru = max(image.lru, sys.now() + keep)
return image.obj
end
function register(asset_name, keep)
log("imagecache", "register %s %d", asset_name, keep)
if not images[asset_name] then
images[asset_name] = {
file = resource.open_file(asset_name),
lru = sys.now() + keep
}
end
return function(keep)
return get(asset_name, keep or 0)
end
end
local function tick()
for asset_name, image in pairs(images) do
local max_age = 0.5
if not image.obj then
max_age = 10
end
if sys.now() - image.lru > max_age then
log("imagecache", "purging image %s", asset_name)
image.file:dispose()
if image.obj then
image.obj:dispose()
end
images[asset_name] = nil
end
end
end
return {
register = register;
get = get;
tick = tick;
}
end
local ImageCache = ImageCache()
local function Clock()
local has_time = false
local time = {diff=0}
local updated = sys.now()
local function since_midnight()
local delta = sys.now() - updated
local seconds = (time.since_midnight + delta) % 86400
return seconds
end
return {
update = function(new_time)
time = new_time
has_time = true
updated = sys.now()
end;
has_time = function()
return has_time
end;
human = function()
local t = since_midnight()
return string.format("%02d:%02d", math.floor(t / 3600), math.floor(t % 3600 / 60))
end;
unix = function()
return os.time() + time.diff
end;
week_hour = function()
return time.week_hour
end;
day_of_week = function()
return time.dow
end;
since_midnight = since_midnight,
today = function()
return {
day = time.day;
month = time.month;
year = time.year;
}
end;
}
end
local function Clocks()
local tz_clocks = {}
local function create_and_get(tz)
if not tz_clocks[tz] then
tz_clocks[tz] = Clock()
end
return tz_clocks[tz]
end
util.data_mapper{
["clock/(.*)"] = function(tz, data)
local time = json.decode(data)
local clock = create_and_get(tz)
clock.update(time)
end;
}
return {
get = create_and_get;
}
end
local Clocks = Clocks()
local function Countdowns()
local countdowns = {}
util.data_mapper{
["countdown"] = function(update)
local update = json.decode(update)
countdowns[update.target] = update.unix
end;
}
local function delta(target)
local unix = countdowns[target]
if not unix then
return 0
end
return unix - os.time()
end
return {
delta = delta;
}
end
local Countdowns = Countdowns()
-- clock object pointing to the configured schedule timezone
local schedule_clock = setmetatable({
tz = "UTC",
}, {
__index = function(config, key)
return Clocks.get(config.tz)[key]
end,
})
node.event("config_updated", function(config)
if config.timezone == "device" then
schedule_clock.tz = config.__metadata.timezone
else
schedule_clock.tz = config.timezone
end
end)
local function clock_for_tz_or_default(tz)
if tz then
return Clocks.get(tz)
else
return schedule_clock
end
end
local SharedData = function()
-- {
-- scope: { key: data }
-- }
local data = {}
-- {
-- key: { scope: listener }
-- }
local listeners = {}
local function call_listener(scope, listener, key, value)
local ok, err = xpcall(listener, debug.traceback, scope, value)
if not ok then
log("shareddata", "while calling listener for key %s: %s", key, err)
end
end
local function call_listeners(scope, key, value)
local key_listeners = listeners[key]
if not key_listeners then
return
end
for _, listener in pairs(key_listeners) do
call_listener(scope, listener, key, value)
end
end
local function update(scope, key, value)
if not data[scope] then
data[scope] = {}
end
data[scope][key] = value
if value == nil and not next(data[scope]) then
data[scope] = nil
end
return call_listeners(scope, key, value)
end
local function delete(scope, key)
return update(scope, key, nil)
end
local function add_listener(scope, key, listener)
local key_listeners = listeners[key]
if not key_listeners then
listeners[key] = {}
key_listeners = listeners[key]
end
if key_listeners[scope] then
error "right now only a single listener is supported per scope"
end
key_listeners[scope] = listener
for scope, scoped_data in pairs(data) do
for key, value in pairs(scoped_data) do
call_listener(scope, listener, key, value)
end
end
end
local function del_scope(scope)
for key, key_listeners in pairs(listeners) do
key_listeners[scope] = nil
if not next(key_listeners) then
listeners[key] = nil
end
end
local scoped_data = data[scope]
if scoped_data then
for key, value in pairs(scoped_data) do
delete(scope, key)
end
end
data[scope] = nil
end
return {
update = update;
delete = delete;
add_listener = add_listener;
del_scope = del_scope;
}
end
local data = SharedData()
local tile_loader = loader.setup "tile.lua"
tile_loader.before_load = function(tile, exports)
exports.tcp_clients = tcp_clients
exports.wait_frame = helper.wait_frame
exports.wait_t = helper.wait_t
exports.frame_between = helper.frame_between
exports.screen = {
place_video = screen.place_video;
set_scissor = screen.set_scissor;
get_rotation = screen.get_rotation;
}
exports.clock = schedule_clock;
exports.update_data = function(key, value)
data.delete(tile, key)
data.update(tile, key, value)
end
exports.add_listener = function(key, listener)
data.add_listener(tile, key, listener)
end
end
tile_loader.unload = function(tile)
data.del_scope(tile)
end
local function dispatch_to_all_tiles(event, ...)
for module_name, module in pairs(tile_loader.modules) do
local fn = module[event]
if fn then
local ok, err = xpcall(fn, debug.traceback, ...)
if not ok then
log(
"dispatch_to_all_tiles",
"cannot dispatch '%s' into '%s': %s",
event, module_name, err
)
end
end
end
end
local kenburns_shader = resource.create_shader[[
uniform sampler2D Texture;
varying vec2 TexCoord;
uniform vec4 Color;
uniform float x, y, s;
void main() {
gl_FragColor = texture2D(Texture, TexCoord * vec2(s, s) + vec2(x, y)) * Color;
}
]]
local gl_effects = {
none = function(x1, y1, x2, y2)
local w, h = x2-x1, y2-y1
return function(draw, t)
gl.pushMatrix()
gl.translate(x1, y1)
draw(t)
gl.popMatrix()
end, w, h
end,
rotation = function(x1, y1, x2, y2, config)
local w, h = x2-x1, y2-y1
return function(draw, t, starts, ends)
local effect_easing = config.effect_easing or 'inQuad'
local effect_rotation = config.effect_rotation or 'y-axis'
local effect_pivot = config.effect_pivot or 'center'
local pivot_x, pivot_y = unpack(({
center = { .5, .5},
top = { .5, 0},
bottom = { .5, 1},
left = { 0, .5},
right = { 1, .5},
})[effect_pivot])
local enter_t = min(t-starts, 1)
local exit_t = 1-max(0, 1-(ends-t))
local effect_value = (
-easing[effect_easing](1-enter_t, 0, 1, 1)
+easing[effect_easing](1-exit_t, 0, 1, 1)
)
gl.pushMatrix()
gl.translate(x1+w*pivot_x, y1+h*pivot_y)
if effect_rotation == 'y-axis' then
gl.rotate(effect_value*90, 0, 1, 0)
elseif effect_rotation == 'x-axis' then
gl.rotate(effect_value*90, 1, 0, 0)
end
gl.translate(-w*pivot_x, -h*pivot_y)
draw(t)
gl.popMatrix()
end, w, h
end,
enter_exit_move = function(x1, y1, x2, y2, config)
local w, h = x2-x1, y2-y1
return function(draw, t, starts, ends)
local effect_duration = config.effect_duration or 1
local effect_easing = config.effect_easing or 'inQuad'
local effect_direction = config.effect_direction or 'from_left'
local progress = easing[effect_easing](
1 - helper.ramp(starts, ends, t, effect_duration),
0, 1, 1
)
local move_x, move_y = unpack(({
from_left = {-w, 0},
from_right = { w, 0},
from_bottom = { 0, h},
from_top = { 0, -h},
})[effect_direction])
gl.pushMatrix()
gl.translate(x1+move_x*progress, y1+move_y*progress)
draw(t)
gl.popMatrix()
end, w, h
end,
}
local function ChildTile(asset, config, x1, y1, x2, y2)
return function(starts, ends)
local impl = tile_loader.modules[asset.asset_name]
return impl.task(starts, ends, config, x1, y1, x2, y2)
end
end
local function ImageTile(asset, config, x1, y1, x2, y2)
-- config:
-- kenburns: true/false
-- fade_time: 0-1
-- fit: true/false
local img = ImageCache.register(asset.asset_name, 10)
local fade_time = config.fade_time or 0
return function(starts, ends)
helper.wait_t(starts - 2)
-- force loading and keep around for 3 seconds minimum
img(3)
local effect, width, height = gl_effects[
config.effect or 'none'
](x1, y1, x2, y2, config)
local function draw(now)
if config.fit then
util.draw_correct(img(), 0, 0, width, height, helper.ramp(
starts, ends, now, fade_time
))
else
img():draw(0, 0, width, height, helper.ramp(
starts, ends, now, fade_time
))
end
end
if config.kenburns then
local function lerp(s, e, t)
return s + t * (e-s)
end
local paths = {
{from = {x=0.0, y=0.0, s=1.0 }, to = {x=0.08, y=0.08, s=0.9 }},
{from = {x=0.05, y=0.0, s=0.93}, to = {x=0.03, y=0.03, s=0.97}},
{from = {x=0.02, y=0.05, s=0.91}, to = {x=0.01, y=0.05, s=0.95}},
{from = {x=0.07, y=0.05, s=0.91}, to = {x=0.04, y=0.03, s=0.95}},
}
local path = paths[math.random(1, #paths)]
local to, from = path.to, path.from
if math.random() >= 0.5 then
to, from = from, to
end
local w, h = img():size()
local duration = ends - starts
local function lerp(s, e, t)
return s + t * (e-s)
end
for now in helper.frame_between(starts, ends) do
local t = (now - starts) / duration
kenburns_shader:use{
x = lerp(from.x, to.x, t);
y = lerp(from.y, to.y, t);
s = lerp(from.s, to.s, t);
}
effect(draw, now, starts, ends)
kenburns_shader:deactivate()
end
else
for now in helper.frame_between(starts, ends) do
effect(draw, now, starts, ends)
end
end
end
end
local transparent_shader = resource.create_shader[[
uniform sampler2D Texture;
varying vec2 TexCoord;
uniform vec3 Transparent;
uniform vec4 Color;
// These values seem to work reasonably well.
const float thresholdSensitivity = 0.15;
const float smoothing = 0.3;
void main() {
vec3 col = texture2D(Texture, TexCoord).rgb;
float maskY = 0.2989 * Transparent.r + 0.5866 * Transparent.g + 0.1145 * Transparent.b;
float maskCr = 0.7132 * (Transparent.r - maskY);
float maskCb = 0.5647 * (Transparent.b - maskY);
float Y = 0.2989 * col.r + 0.5866 * col.g + 0.1145 * col.b;
float Cr = 0.7132 * (col.r - Y);
float Cb = 0.5647 * (col.b - Y);
float blendValue = smoothstep(thresholdSensitivity, thresholdSensitivity + smoothing, distance(vec2(Cr, Cb), vec2(maskCr, maskCb)));
gl_FragColor = vec4(col * blendValue, 1.0 * blendValue);
}
]]
local function VideoTile(asset, config, x1, y1, x2, y2)
-- config:
-- fade_time: 0-1
-- looped
-- transparency: bool
-- transparent_color: #ffffff
local file = resource.open_file(asset.asset_name)
local fade_time = config.fade_time or 0.5
local looped = config.looped
local audio = config.audio
local transparency = config.transparency
local r, g, b = helper.parse_rgb(config.transparent_color or "#ffffff")
local shader_args = {
Transparent = {r, g, b}
}
return function(starts, ends)
helper.wait_t(starts - 2)
local vid = resource.load_video{
file = file,
paused = true,
looped = looped,
audio = audio,
}
for now in helper.frame_between(starts, ends) do
if transparency then
transparent_shader:use(shader_args)
end
vid:draw(x1, y1, x2, y2, helper.ramp(
starts, ends, now, fade_time
)):start()
if transparency then
transparent_shader:deactivate()
end
end
vid:dispose()
end
end
local function RawVideoTile(asset, config, x1, y1, x2, y2)
-- config:
-- asset_name: 'foo.mp4'
-- fit: aspect fit or scale?
-- fade_time: 0-1
-- looped
-- layer: video layer for raw videos
local file = resource.open_file(asset.asset_name)
local fade_time = config.fade_time or 0.5
local looped = config.looped
local audio = config.audio
local layer = config.layer or 5
return function(starts, ends)
helper.wait_t(starts - 2)
local vid = resource.load_video{
file = file,
paused = true,
looped = looped,
audio = audio,
raw = true,
}
vid:layer(-10)
for now in helper.frame_between(starts, ends) do
screen.place_video(vid, layer, helper.ramp(
starts, ends, now, fade_time
), x1, y1, x2, y2):start()
end
vid:dispose()
end
end
local function Streams()
local frame = 0
local streams = {}
local MIN_LOAD_INTERVAL = 5
local LOADING_TIMEOUT = 10
local function stream_key(url, audio)
return string.format("%s|%s", url, audio)
end
local function get_stream(url, audio, immediate_reload)
local now = sys.now()
local key = stream_key(url, audio)
if not streams[key] then
streams[key] = {
last_used = now,
next_load = now,
last_load = nil,
url = url,
vid = nil,
}
end
local stream = streams[key]
local state = stream.vid and stream.vid:state()
local need_reload = (
not stream.vid
or state == "finished" or state == "error"
or (state == "loading" and now - stream.last_load > LOADING_TIMEOUT)
)
if need_reload then
print("[stream] needs reload", url)
if stream.vid then
print "[stream] disposing current stream instance"
stream.vid:dispose()
stream.vid = nil
end
if now >= stream.next_load or immediate_reload then
stream.next_load = now + MIN_LOAD_INTERVAL
stream.last_load = now
stream.vid = resource.load_video{
file = url,
audio = audio,
raw = true,
}
stream.vid:layer(-10):place(0, 0, 0, 0):alpha(0)
end
end
stream.last_used = frame
return stream.vid
end
local function tick()
frame = frame + 1
if frame % 300 == 0 then
print "[stream] active streams"
pp(streams)
end
for key, stream in pairs(streams) do
local frame_delta = frame - stream.last_used
if frame_delta > 1 then
print("[stream] disposing stream", stream.url)
if stream.vid then
stream.vid:dispose()
end
streams[key] = nil
end
end
end
return {
get_stream = get_stream;
tick = tick;
}
end
local streams = Streams()
local function StreamTile(asset, config, x1, y1, x2, y2)
local layer = config.layer or 5
local url = config.url or ""
local audio = config.audio
return function(starts, ends)
helper.wait_t(starts - 1)
-- force load
streams.get_stream(url, audio, true)
-- keepalive before start
for now in helper.frame_between(0, starts) do
streams.get_stream(url, audio)
end
streams.get_stream(url, audio)
-- player
for now in helper.frame_between(starts, ends) do
local vid = streams.get_stream(url, audio)
if vid then
screen.place_video(vid, layer, 1, x1, y1, x2, y2)
end
end
end
end
local function FlatTile(asset, config, x1, y1, x2, y2)
-- config:
-- color: "#rrggbb"
-- fade_time: 0-1
local r, g, b = helper.parse_rgb(config.color or "#ffffff")
local a = (config.alpha or 255)/255
local flat = resource.create_colored_texture(r, g, b, a)
local fade_time = config.fade_time or 0.5
return function(starts, ends)
for now in helper.frame_between(starts, ends) do
flat:draw(x1, y1, x2, y2, helper.ramp(
starts, ends, now, fade_time
))
end
flat:dispose()
end
end
local function CountdownTile(asset, config, x1, y1, x2, y2)
local target = config.target
local type = config.type or "hms"
local r, g, b = helper.parse_rgb(config.color or "#333333")
local align = config.align or "center"
local mode = config.mode or "countdown"
local size = y2 - y1
local font = ({
default = font_regl,
digital = font_7seg,
})[config.font or "default"]
local fmt = ({
german = {
dh = "%d Tag(e), %d Std.",
hms = "%d Std %d Min %d Sek",
ms = "%d Min %d Sek",
hm = "%d Std %d Min",
},
english = {
dh = "%d day(s), %dh",
hms = "%dh %dm %ds",
ms = "%dm %ds",
hm = "%dh %dm",
},
none = {
hms = "%d:%02d:%02d",
ms = "%d:%02d",
hm = "%d:%02d",
},
})[config.locale or "english"]
return function(starts, ends)
for now in helper.frame_between(starts, ends) do
local delta = Countdowns.delta(target)
delta = ceil(delta)
if mode == "countdown" then
delta = max(0, delta)
elseif mode == "countup" then
delta = min(0, delta)
end
delta = abs(delta)
local text
if type == "hms" then
text = string.format(fmt.hms,
math.floor(delta / 3600),
math.floor(delta % 3600 / 60),
math.floor(delta % 60)
)
elseif type == "hm" then
text = string.format(fmt.hm,
math.floor(delta / 3600),
math.floor(delta % 3600 / 60)
)
elseif type == "adaptive_dhm" then
if abs(delta) > 86400 then
text = string.format(fmt.dh,
math.floor(delta / 86400),
math.floor(delta % 86400 / 3600)
)
elseif abs(delta) > 120 * 60 then