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local opts = {
command_on_first_image_loaded="",
command_on_image_loaded="",
command_on_non_image_loaded="",
}
local options = require 'mp.options'
local msg = require 'mp.msg'
options.read_options(opts, nil, function() end)
function run_maybe(str)
if str ~= "" then
mp.command(str)
end
end
local was_image = false
function set_image(is_image)
if is_image and not was_image then
msg.info("First image detected")
run_maybe(opts.command_on_first_image_loaded)
end
if is_image then
msg.info("Image detected")
run_maybe(opts.command_on_image_loaded)
end
if not is_image and was_image then
msg.info("Non-image detected")
run_maybe(opts.command_on_non_image_loaded)
end
was_image = is_image
end
local properties = {}
function properties_changed()
local dwidth = properties["dwidth"]
local tracks = properties["track-list"]
local path = properties["path"]
local framecount = properties["estimated-frame-count"]
if not path or path == "" then return end
if not tracks or #tracks == 0 then return end
local audio_tracks = 0
for _, track in ipairs(tracks) do
if track.type == "audio" then
audio_tracks = audio_tracks + 1
end
end
-- only do things when state is consistent
if not framecount and audio_tracks > 0 then
set_image(false)
elseif framecount and dwidth and dwidth > 0 then
-- png have 0 frames, jpg 1 ¯\_(ツ)_/¯
set_image((framecount == 0 or framecount == 1) and audio_tracks == 0)
end
end
function observe(propname)
mp.observe_property(propname, "native", function(_, val)
if val ~= properties[propname] then
properties[propname] = val
msg.verbose("Property " .. propname .. " changed")
properties_changed()
end
end)
end
observe("estimated-frame-count")
observe("track-list")
observe("dwidth")
observe("path")
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