show lyrics in vlc

lyrics.lua

--[[--
show lyrics on visualization 在可视化界面显示歌词
url 项目地址: https://gist.github.com/youthlin/a3b3fc033586bede6046086f3d889322
author 作者: youthlin
author url 作者博客: https://youthlin.com

How to install:
1. put this file on lua/intf/
2. enable extra interface: luaintf (Settings[Show all] -> Interface -> Main Interfaces -> extract modules='luaintf'[make the 'Lua interpreter' checked])
    (important: extraintf=luaintf not lua)
3. set lua interface to this file name: All Settings -> Interface -> Main Interface -> Lua -> Lua interface = lyrics
4. Settings - subtitle/osd - make "enable osd" checked.
如何启用：
1、将本文件放在 lua/intf/ 文件夹下
2、设置（显示所有）-界面-主界面-扩展界面，填入 luaintf，并勾选 Lua interpreter(勾选会自动填为 lua, 需要手动改成 luaintf)
3、设置（显示所有）-界面-主界面-Lua，在 Lua 界面 字段填入本文件名: lyrics
4、设置-字幕/OSD-确保 "启用 OSD" 勾选，下方可以设置字体

INSTALLATION directory (\lua\intf\): 安装文件夹在哪里：
* Windows (all users): %ProgramFiles%\VideoLAN\VLC\lua\intf\
* Windows (current user): %APPDATA%\VLC\lua\intf\
* Linux (all users): /usr/lib/vlc/lua/intf/
* Linux (current user): ~/.local/share/vlc/lua/intf/
* Mac OS X (all users): /Applications/VLC.app/Contents/MacOS/share/lua/intf/
* Mac OS X (current user): /Users/%your_name%/Library/Application Support/org.videolan.vlc/lua/intf/
Create directory if it does not exist!

links:
lrcview extension: http://eadmaster.altervista.org/pub/prj/lrcview.lua
Times v3.2: https://addons.videolan.org/p/1154032/
vlc lua document: https://github.com/videolan/vlc/tree/master/share/lua
document: https://github.com/verghost/vlc-lua-docs/blob/master/index.md
VLC forum / Scripting VLC in lua: https://forum.videolan.org/viewforum.php?f=29
--]] --
-- [[ entrance ]] --
(function() -- 立即执行的函数: 入口
    local lrc_config = { -- 配置项
        supports = {"mp3", "wav", "flac", "ape", "aif", "m4a", "ogg"}, -- 后缀名 file extension
        pre = { -- 上一行歌词
            show = false,
            prefix = "",
            suffix = " ♪\n"
        },
        current = { -- 当前歌词
            show = true,
            prefix = "",
            suffix = " ♪\n"
        },
        next = { -- 下一行歌词
            show = true,
            prefix = "",
            suffix = " ♪\n"
        },
        lyrics_not_found = "未找到歌词", -- 未找到歌词时显示的文本
        position = "top-right" -- 显示位置
    }

    if vlc == nil then
        vlc = {} -- 消除警告
    end

    local function info(lm) -- Info
        vlc.msg.info("[lyrics] " .. lm)
    end
    local function logerr(lm) -- Error
        vlc.msg.err("[lyrics] " .. lm)
    end
    local function debug(lm) -- debug
        vlc.msg.dbg("[lyrics] " .. lm)
    end
    info("lyrics started! 歌词插件已启动")

    local function sleep(st) -- 休眠的秒数 seconds
        vlc.misc.mwait(vlc.misc.mdate() + st * 1000000)
    end

    local function dump(name, object, level) -- 显示变量
        if level == nil then
            level = 0
        end
        local prefix = string.rep(" ", level * 2)
        if type(object) ~= "table" then -- 不是 table
            info(prefix .. "> " .. name .. " type=" .. type(object) .. " tostring = " .. tostring(object))
            return false
        end
        info(prefix .. "> " .. name .. " tostring = " .. tostring(object))
        for k, v in pairs(object) do
            k = name .. "." .. k
            info(prefix .. "> " .. k .. " => " .. type(v) .. " = " .. tostring(v))
            if type(v) == "table" then
                dump(k, v, level + 1)
            end
        end
        return true
    end
    dump("vlc", vlc)
    dump("lrc_config", lrc_config)

    local function is_win()
        return vlc.win ~= nil
    end
    info("is windows == " .. tostring(is_win()))

    local curi = nil -- current uri
    local is_audio = false
    local seconds_to_lrc = nil -- seconds to lyrics
    local VLC_tc = 1 -- time corrector
    if tonumber(string.sub(vlc.misc.version(), 1, 1)) > 2 then
        VLC_tc = 1000000
    end -- VLC3
    debug("VLC_tc=" .. tostring(VLC_tc))

    local function reset() -- 停止播放时重置变量
        info("reset")
        curi = nil
        is_audio = false
        seconds_to_lrc = nil
    end

    local function get_lrc() -- 从 lrc 文件获取歌词
        if curi == nil or curi == "" then
            return ""
        end

        local file = curi
        if is_win() then
            file = string.gsub(file, "file:///", "") -- file:///c:/xxx -> c:/xxx
        else
            file = string.gsub(file, "file://", "") -- file:///Users/xxx -> /Users/xxx
        end

        local dotIndex = -1
        local dot = string.byte(".")
        for i = #file, 0, -1 do
            local ch = string.sub(file, i, i)
            local ch_byte = string.byte(ch)
            if ch_byte < 128 then
                if ch_byte == dot then
                    dotIndex = i
                    break
                end
            else
                break
            end
        end

        file = string.sub(file, 1, dotIndex) .. "lrc"
        if string.match(file, "^http") then
            info("从网络 lrc 文件读取歌词: " .. file .. " dotIndex=" .. dotIndex)
            local fd = vlc.stream(file)
            if not fd then
                logerr("未获取到网络歌词")
                return ""
            end
            dump("fd", fd)
            local result = fd:read(65653)
            fd = nil
            info('网络读取歌词 ok')
            return result
        end

        file = vlc.strings.decode_uri(file)
        info("从本地 lrc 文件读取歌词: " .. file .. " dotIndex=" .. dotIndex)
        -- 使用 vlc.io.open 而不是原生 io.open 可以兼容 Windows 下无法打开中文路径的问题
        -- https://github.com/verghost/vlc-lua-docs/blob/master/m/io/index.md
        local f, err = vlc.io.open(file, "r")
        if f == nil then
            logerr("找不到 lrc 歌词文件: " .. file .. " err: " .. err)
            return ""
        end
        local result = f:read("*all")
        f:close()
        info('本地 lrc 文件读取歌词 ok')
        return result
    end

    local function get_lyrics() -- 获取当前歌曲的歌词
        debug("get_lyrics")
        local item = vlc.input.item()
        if item == nil then
            return ""
        end
        local metas = item:metas()
        dump("metas", metas)
        if metas["LYRICS"] then
            info("从歌曲 Tag 中获取歌词")
            return metas["LYRICS"]
        end
        return get_lrc()
    end

    local function extract_time(line) -- 获取一行歌词的开始时间 seconds
        if (line == nil) then
            return (-1)
        end
        local min, sec, mil = line:match('%[(%d%d):(%d%d)%.(%d%d)%]')
        if (min == nil or sec == nil or mil == nil) then
            return (-1)
        end
        return (tonumber(min) * 60 + tonumber(sec) + tonumber(mil) / 100)
    end

    local function build_lrc_table() -- 构造歌词表
        debug("build_lrc_table")
        local lrc = {}
        local lyrics = get_lyrics()
        local i = 1
        for line in lyrics:gmatch("[^\n]+") do
            line = string.gsub(line, "\n", "") -- remove newlines
            line = string.gsub(line, "\r", "") -- remove newlines
            local time = extract_time(line)
            if time >= 0 then
                lrc[i] = {
                    time = time,
                    lrc = string.gsub(line, "^%[.-%]", "") -- 去掉 [xxx] 时间
                }
                i = i + 1
            end
        end
        return lrc
    end

    local function uri_changed(uri) -- 读取当前歌曲的歌词
        info("uri_changed to " .. uri)
        curi = uri
        local support = false
        for _, value in pairs(lrc_config.supports) do
            if string.match(uri, value .. "$") then
                support = true
                break
            end
        end
        is_audio = support
        info("is_audio=" .. tostring(support))
        if not support then
            return
        end
        seconds_to_lrc = build_lrc_table()
        dump("seconds_to_lrc", seconds_to_lrc)
        if #seconds_to_lrc == 0 then
            info("没有歌词")
        end
        local input = vlc.object.input()
        dump("input", input)
    end

    local function get_show_lyrics() -- 获取要显示的歌词
        local total = #seconds_to_lrc
        -- 没有歌词
        if #seconds_to_lrc == 0 then
            -- debug("没有歌词")
            return lrc_config.lyrics_not_found
        end

        -- 有歌词
        local input = vlc.object.input()
        local current_second = vlc.var.get(input, "time") / VLC_tc
        local prefix, current, next = "", "", ""
        debug("get_show_lyrics current_second = " .. current_second)
        local index = 1
        for i = 1, total do
            local item = seconds_to_lrc[i]
            local second, value = item.time, item.lrc
            if second <= current_second then
                current = value
                index = i
            end
        end
        if index > 1 then
            prefix = seconds_to_lrc[index - 1].lrc
        end
        if index < total then
            next = seconds_to_lrc[index + 1].lrc
        end
        info("get_show_lyrics = " .. prefix .. " / " .. current .. " / " .. next)
        local result = ""
        if lrc_config.pre.show then
            result = result .. lrc_config.pre.prefix .. prefix .. lrc_config.pre.suffix
        end
        if lrc_config.current.show then
            result = result .. lrc_config.current.prefix .. current .. lrc_config.current.suffix
        end
        if lrc_config.next.show then
            result = result .. lrc_config.next.prefix .. next .. lrc_config.next.suffix
        end
        return result
    end

    local function do_task() -- 播放时持续调用的函数(每0.1s)
        --[[
        local vout = vlc.object.vout()
        if vout == nil then
            -- info("可视化未开启")
            return
        end
        --]]
        if not is_audio then
            return
        end
        vlc.osd.message(get_show_lyrics(), nil, lrc_config.position)
    end

    -- 主循环
    while true do
        if vlc.volume.get() == -256 then -- 当进程被杀时
            break
        end -- inspired by syncplay.lua; kills vlc.exe process in Task Manager

        if vlc.playlist.status() == "stopped" then -- no input or stopped input
            if curi then -- input stopped
                info("stopped")
                reset()
            end
            sleep(1)
        else -- playing, paused
            local uri = nil
            if vlc.input.item() then
                uri = vlc.input.item():uri()
            end
            if not uri then --- WTF (VLC 2.1+): status playing with nil input? Stopping? O.K. in VLC 2.0.x
                info("WTF??? " .. vlc.playlist.status())
                sleep(0.1)
            elseif not curi or curi ~= uri then -- new input (first input or changed input)
                uri_changed(uri)
            else -- current input
                do_task()
                if vlc.playlist.status() == "playing" then
                    -- info("playing")
                elseif vlc.playlist.status() == "paused" then
                    -- info("paused")
                    sleep(0.3)
                else -- ?
                    info("unknown play status")
                    sleep(1)
                end
                sleep(0.1) -- 每 0.1 秒调用一次 task
            end
        end
    end
end)()

作者，你好
我是VLC 3.02 win10版本
我也是使用这个插件显示未找到歌词


经排查发现是中文问题，我播放英文歌曲可以正常显示歌词

必须要满足mp3和lrc文件名称为英文，同时lrc歌词也要为英文方可正常显示歌词，这应该是编码问题，请问大佬有办法解决吗，非常刚需这个插件，谢谢！

@Bigxxi 你好，可以把日志级别调整为debug看下。也可加微信交流：Youth_Lin

问题：在 Windows 环境中，lrc 路径包含中文(Non-Ascii字符)，使用 lua 原生的 io.open 会报错 invalid argument
解决：使用 vlc.io.open 即可，vlc 内部封装的这个函数入参为 UTF-8 字符串，支持中文
脚本已更新

• 通过本文确认 io.open 在 Windows 上无法打开中文路径：LUA 编码 CODEPAGE CP936 UNICODE UTF8 及 相关库LIBRARY 整理
• 通过本项目搜到 vlc 内部有 io 库：VLC Lua Docs, IO Module

vlc 内部如何支持非 ASCII 字符的：

// vlc.io.open 的 C 实现【1】/modules/lua/libs/io.c
static int vlclua_io_open( lua_State *L )

// vlclua_io_open 调用 vlc_fopen【2】/src/text/filesystem.c
FILE *vlc_fopen (const char *filename, const char *mode)

// vlc_fopen 调用 vlc_open【3】/src/win32/filesystem.c 【4】
int vlc_open (const char *filename, int flags, ...)

// 调用同文件 widen_path 函数【5】/src/win32/filesystem.c
static wchar_t *widen_path (const char *path)

// 【6】include/vlc_charset.h
VLC_USED static inline wchar_t *ToWide (const char *utf8)

// 【7】是 windows 提供的 api
MultiByteToWideChar

• 【1】vlclua_io_open 函数的实现
• 【2】vlc_fopen
• 【3】在代码中全局搜索 vlc_open
• 【4】vlc_open 在Win32 下的实现
• 【6】ToWide
• 【7】搜索 MultiByteToWideChar 找到 api 文档地址【8】
• 【8】https://learn.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-multibytetowidechar#parameters

[Mac]网易云音乐网页版歌词显示到菜单栏

顺便补充一下，如果有朋友使用外挂lrc文件在windows上无法显示中文歌词，需要将lrc文件改为utf-8编码，并且要在设置-字幕/OSD-字体改为【Microsoft YaHei UI】，部分中文字体也会导致歌词失效