[mpv-script] uosc的辅助脚本

opt_helper.lua

--[[

依赖的前置脚本： https://github.com/hooke007/MPV_lazy/tree/main/portable_config/scripts/uosc

用于：
实时简易快速切换 --cscale --scale --dscale --tscale 的各值
快速预览各用户着色器（仅解析 `~~/shaders/` 目录）

input.conf 示例：

 Alt+o      script-binding opt_helper/menu_load      # 打开辅助菜单

]]

local utils = require("mp.utils")
local scr = mp.get_script_name()
local str_val0 = "script-message-to " .. scr .." refresh"
local str_val = " ; " .. str_val0
local str_val1 = "no-osd set cscale bilinear ; no-osd set scale bilinear ; no-osd set dscale \"\" ; no-osd set tscale mitchell ; no-osd set glsl-shaders \"\""
local dir_hooks = mp.command_native({"expand-path", "~~/shaders"}) .. "/"

-- 查询全部 `--xscale=help`
-- 分类方式 https://github.com/mpv-player/mpv/blob/master/video/out/filter_kernels.c
local opt_xscale = {
	"bilinear",            -- baseline

	-- kernel type
	---- Spline filters
	"spline16",
	"spline36",
	"spline64",
	---- Sinc filters
	"sinc",
	"lanczos",             -- default of scale
	"ginseng",
	---- Jinc filters
	"jinc",
	"ewa_lanczos",
	"ewa_hanning",
	"ewa_ginseng",
	"ewa_lanczossharp",
	"ewa_lanczos4sharpest",
	"ewa_lanczossoft",
	"haasnsoft",
	---- Cubic filters
	"bicubic",
	"bicubic_fast",        -- sp
	"hermite",             -- default of dscale
	"catmull_rom",
	"mitchell",
	"robidoux",
	"robidouxsharp",
	"ewa_robidoux",
	"ewa_robidouxsharp",
	---- Miscellaneous filters
	"box",
	"nearest",
	"oversample",          -- sp
	"triangle",
	"gaussian",

	-- window type
	--"box",               -- dup
	--"triangle",          -- dup
	"bartlett",
	"cosine",
	"hanning",
	"tukey",
	"hamming",
	"quadric",
	"welch",
	"kaiser",
	"blackman",
	--"gaussian",          -- dup
	--"sinc",              -- dup
	--"jinc",              -- dup
	"sphinx",
}
local opt_tscale = {
	"linear",              -- baseline

	-- kernel type
	---- Spline filters
	"spline16",
	"spline36",
	"spline64",
	---- Sinc filters
	"sinc",
	"lanczos",
	"ginseng",
	---- Cubic filters
	"bicubic",
	"hermite",
	"catmull_rom",
	"mitchell",
	"robidoux",
	"robidouxsharp",
	---- Miscellaneous filters
	"box",
	"nearest",
	"oversample",          -- sp baseline2 (default)
	"triangle",
	"gaussian",

	-- window type
	--"box",               -- dup
	--"triangle",          -- dup
	"bartlett",
	"cosine",
	"hanning",
	"tukey",
	"hamming",
	"quadric",
	"welch",
	"kaiser",
	"blackman",
	--"gaussian",          -- dup
	--"sinc",              -- dup
	"sphinx",
}

local subitems_01 = {}
local subitems_02 = {}
local subitems_03 = {}
local subitems_04 = {}
function get_subitems(var01, var02, var03, var04)
	for i = 1, #var01 do
		table.insert(var02, {
			title = var01[i],
			value = "set " .. var03 .. " " .. var04 .. var01[i] .. str_val
		})
	end
end
get_subitems(opt_xscale, subitems_01, "cscale", "")
get_subitems(opt_xscale, subitems_02, "scale", "")
get_subitems(opt_xscale, subitems_03, "dscale", "")
get_subitems(opt_tscale, subitems_04, "tscale", "")

local usr_hooks = {}
local subitems_05 = {}
function check_file(file, extensions)
	for _, ext in ipairs(extensions) do
		if file:sub(-#ext) == ext then
			return true
		end
	end
	return false
end
function get_hooks(directory)
	local extensions = { ".glsl", ".hook" }
	local files = utils.readdir(directory, "files")
	if files == nil then
		return "None"
	end
	local file_list = {}
	for _, file in ipairs(files) do
		if check_file(file, extensions) then
			table.insert(file_list, file)
		end
	end
	return file_list
end
usr_hooks = get_hooks(dir_hooks)
if usr_hooks == "None" then
	subitems_05 = {{ hint = "unavailable user hooks", value = "ignore" }}
else
	get_subitems(usr_hooks, subitems_05, "glsl-shaders", "~~/shaders/")
end

function create_menu_data()
	return {
		type = "unknown",
		title = "list-options helper",
		keep_open = true,
		items = {
			{
				title = "--cscale",
				hint = mp.get_property("cscale") == "" and "--scale" or mp.get_property("cscale"),
				items = subitems_01,
			},
			{
				title = "--scale",
				hint = mp.get_property("scale"),
				items = subitems_02,
			},
			{
				title = "--dscale",
				hint = mp.get_property("dscale") == "" and "--scale" or mp.get_property("dscale"),
				items = subitems_03,
			},
			{
				title = "--tscale",
				hint = mp.get_property("tscale"),
				items = subitems_04,
			},
			{
				title = "Shader",
				hint = "(single preview)",
				items = subitems_05,
			},
			{
				title = "REFRESH",
				value = str_val0,
			},
			{
				title = "RESET",
				value = str_val1 .. " ; " .. str_val0,
			},
		}
	}
end



mp.add_key_binding(nil, "menu_load", function()
	local json = utils.format_json(create_menu_data())
	mp.commandv("script-message-to", "uosc", "open-menu", json)
end)

mp.register_script_message("refresh", function()
	local json = utils.format_json(create_menu_data())
	mp.commandv("script-message-to", "uosc", "update-menu", json)
end)