discord.jsとvoicevoxでDiscordのテキストチャットをずんだもんに読み上げてもらう

モチベーション

Javascriptの勉強をしたので夏休みの課題として取り組みました
また似た内容の記事をいくつか見かけましたがVoicevoxから取得したデータをローカルのwavに保存してそれをcreateAudioResourceに渡しているものが多かったのでそこ何とかしたかったです
※javascript歴が浅い初心者なので稚拙なところはガンガン指摘ください

前提

• Discord側の仕込みは割愛

• node.jsはHyper-V上に構築したRHEL9で実行

[you@loclhost ~]$ cat /etc/redhat-release
Red Hat Enterprise Linux release 9.2 (Plow)
[you@loclhost ~]$ node --version
v18.16.1

• Voicevoxエンジンはホスト側（Windows）で実行※CPU環境とGPU環境の並列稼働

※ipとポートは環境に合わせて読み替えてください
.\run.exe --use_gpu --host=192.168.40.100 --port=50021

※同時にエンジンを立ち上げるため別のアカウントで実行（もっとちゃんとした方法があると思う）
.\run.exe --host=192.168.40.100 --port=50022

※VoicevoxのエンジンをCPU環境とGPU環境を並列に稼働させているのは、自分の環境はGPUが貧弱なのか長文を読み込ませると死ぬので、文字数によってエンジンを使い分けています

とりあえず動くものをということでちゃんとしたエラーハンドリングは今後の課題

導入したパッケージ

package.json

{
  "dependencies": {
    "@discordjs/opus": "^0.9.0",
    "@discordjs/voice": "^0.16.0",
    "axios": "^1.5.0",
    "discord.js": "^14.13.0",
    "ffmpeg-static": "^5.2.0",
    "sodium": "^3.0.2"
  }
}

コード

index.js

const myToken = "あなたのトークン";
const mySeverID = "あなたのサーバーID";
const zBotTextChannelID = "読み上げ元テキストチャットチャンネルID";
const zBotVoiceChannelID = "読み上げ先ボイスチャットチャンネルID";

const zundamon = 3;
const voiceServerGPU = "192.168.40.100:50021";
const voiceServerCPU = "192.168.40.100:50022";


const commandNameConnect = "connect";
const commandNameDisconnect = "disconnect";
const commands = [
    {
        name : commandNameConnect,
        description: "connect zbot!"
    },

    {
        name : commandNameDisconnect,
        description: "disconnect zbot!"    
    }    
];

function emojiRegex(){
    return /\u{1F3F4}\u{E0067}\u{E0062}(?:\u{E0077}\u{E006C}\u{E0073}|\u{E0073}\u{E0063}\u{E0074}|\u{E0065}\u{E006E}\u{E0067})\u{E007F}|\u{1F469}\u200D\u{1F469}\u200D(?:\u{1F466}\u200D\u{1F466}|\u{1F467}\u200D[\u{1F466}\u{1F467}])|\u{1F468}(?:\u{1F3FF}\u200D(?:\u{1F91D}\u200D\u{1F468}[\u{1F3FB}-\u{1F3FE}]|[\u{1F33E}\u{1F373}\u{1F37C}\u{1F393}\u{1F3A4}\u{1F3A8}\u{1F3EB}\u{1F3ED}\u{1F4BB}\u{1F4BC}\u{1F527}\u{1F52C}\u{1F680}\u{1F692}\u{1F9AF}-\u{1F9B3}\u{1F9BC}\u{1F9BD}])|\u{1F3FE}\u200D(?:\u{1F91D}\u200D\u{1F468}[\u{1F3FB}-\u{1F3FD}\u{1F3FF}]|[\u{1F33E}\u{1F373}\u{1F37C}\u{1F393}\u{1F3A4}\u{1F3A8}\u{1F3EB}\u{1F3ED}\u{1F4BB}\u{1F4BC}\u{1F527}\u{1F52C}\u{1F680}\u{1F692}\u{1F9AF}-\u{1F9B3}\u{1F9BC}\u{1F9BD}])|\u{1F3FD}\u200D(?:\u{1F91D}\u200D\u{1F468}[\u{1F3FB}\u{1F3FC}\u{1F3FE}\u{1F3FF}]|[\u{1F33E}\u{1F373}\u{1F37C}\u{1F393}\u{1F3A4}\u{1F3A8}\u{1F3EB}\u{1F3ED}\u{1F4BB}\u{1F4BC}\u{1F527}\u{1F52C}\u{1F680}\u{1F692}\u{1F9AF}-\u{1F9B3}\u{1F9BC}\u{1F9BD}])|\u{1F3FC}\u200D(?:\u{1F91D}\u200D\u{1F468}[\u{1F3FB}\u{1F3FD}-\u{1F3FF}]|[\u{1F33E}\u{1F373}\u{1F37C}\u{1F393}\u{1F3A4}\u{1F3A8}\u{1F3EB}\u{1F3ED}\u{1F4BB}\u{1F4BC}\u{1F527}\u{1F52C}\u{1F680}\u{1F692}\u{1F9AF}-\u{1F9B3}\u{1F9BC}\u{1F9BD}])|\u{1F3FB}\u200D(?:\u{1F91D}\u200D\u{1F468}[\u{1F3FC}-\u{1F3FF}]|[\u{1F33E}\u{1F373}\u{1F37C}\u{1F393}\u{1F3A4}\u{1F3A8}\u{1F3EB}\u{1F3ED}\u{1F4BB}\u{1F4BC}\u{1F527}\u{1F52C}\u{1F680}\u{1F692}\u{1F9AF}-\u{1F9B3}\u{1F9BC}\u{1F9BD}])|\u200D(?:\u2764\uFE0F\u200D(?:\u{1F48B}\u200D)?\u{1F468}|[\u{1F468}\u{1F469}]\u200D(?:\u{1F466}\u200D\u{1F466}|\u{1F467}\u200D[\u{1F466}\u{1F467}])|\u{1F466}\u200D\u{1F466}|\u{1F467}\u200D[\u{1F466}\u{1F467}]|[\u{1F468}\u{1F469}]\u200D[\u{1F466}\u{1F467}]|[\u2695\u2696\u2708]\uFE0F|[\u{1F466}\u{1F467}]|[\u{1F33E}\u{1F373}\u{1F37C}\u{1F393}\u{1F3A4}\u{1F3A8}\u{1F3EB}\u{1F3ED}\u{1F4BB}\u{1F4BC}\u{1F527}\u{1F52C}\u{1F680}\u{1F692}\u{1F9AF}-\u{1F9B3}\u{1F9BC}\u{1F9BD}])|(?:\u{1F3FF}\u200D[\u2695\u2696\u2708]|\u{1F3FE}\u200D[\u2695\u2696\u2708]|\u{1F3FD}\u200D[\u2695\u2696\u2708]|\u{1F3FC}\u200D[\u2695\u2696\u2708]|\u{1F3FB}\u200D[\u2695\u2696\u2708])\uFE0F|\u{1F3FF}|\u{1F3FE}|\u{1F3FD}|\u{1F3FC}|\u{1F3FB})?|\u{1F9D1}(?:[\u{1F3FB}-\u{1F3FF}]\u200D(?:\u{1F91D}\u200D\u{1F9D1}[\u{1F3FB}-\u{1F3FF}]|[\u{1F33E}\u{1F373}\u{1F37C}\u{1F384}\u{1F393}\u{1F3A4}\u{1F3A8}\u{1F3EB}\u{1F3ED}\u{1F4BB}\u{1F4BC}\u{1F527}\u{1F52C}\u{1F680}\u{1F692}\u{1F9AF}-\u{1F9B3}\u{1F9BC}\u{1F9BD}])|\u200D(?:\u{1F91D}\u200D\u{1F9D1}|[\u{1F33E}\u{1F373}\u{1F37C}\u{1F384}\u{1F393}\u{1F3A4}\u{1F3A8}\u{1F3EB}\u{1F3ED}\u{1F4BB}\u{1F4BC}\u{1F527}\u{1F52C}\u{1F680}\u{1F692}\u{1F9AF}-\u{1F9B3}\u{1F9BC}\u{1F9BD}]))|\u{1F469}(?:\u200D(?:\u2764\uFE0F\u200D(?:\u{1F48B}\u200D[\u{1F468}\u{1F469}]|[\u{1F468}\u{1F469}])|[\u{1F33E}\u{1F373}\u{1F37C}\u{1F393}\u{1F3A4}\u{1F3A8}\u{1F3EB}\u{1F3ED}\u{1F4BB}\u{1F4BC}\u{1F527}\u{1F52C}\u{1F680}\u{1F692}\u{1F9AF}-\u{1F9B3}\u{1F9BC}\u{1F9BD}])|\u{1F3FF}\u200D[\u{1F33E}\u{1F373}\u{1F37C}\u{1F393}\u{1F3A4}\u{1F3A8}\u{1F3EB}\u{1F3ED}\u{1F4BB}\u{1F4BC}\u{1F527}\u{1F52C}\u{1F680}\u{1F692}\u{1F9AF}-\u{1F9B3}\u{1F9BC}\u{1F9BD}]|\u{1F3FE}\u200D[\u{1F33E}\u{1F373}\u{1F37C}\u{1F393}\u{1F3A4}\u{1F3A8}\u{1F3EB}\u{1F3ED}\u{1F4BB}\u{1F4BC}\u{1F527}\u{1F52C}\u{1F680}\u{1F692}\u{1F9AF}-\u{1F9B3}\u{1F9BC}\u{1F9BD}]|\u{1F3FD}\u200D[\u{1F33E}\u{1F373}\u{1F37C}\u{1F393}\u{1F3A4}\u{1F3A8}\u{1F3EB}\u{1F3ED}\u{1F4BB}\u{1F4BC}\u{1F527}\u{1F52C}\u{1F680}\u{1F692}\u{1F9AF}-\u{1F9B3}\u{1F9BC}\u{1F9BD}]|\u{1F3FC}\u200D[\u{1F33E}\u{1F373}\u{1F37C}\u{1F393}\u{1F3A4}\u{1F3A8}\u{1F3EB}\u{1F3ED}\u{1F4BB}\u{1F4BC}\u{1F527}\u{1F52C}\u{1F680}\u{1F692}\u{1F9AF}-\u{1F9B3}\u{1F9BC}\u{1F9BD}]|\u{1F3FB}\u200D[\u{1F33E}\u{1F373}\u{1F37C}\u{1F393}\u{1F3A4}\u{1F3A8}\u{1F3EB}\u{1F3ED}\u{1F4BB}\u{1F4BC}\u{1F527}\u{1F52C}\u{1F680}\u{1F692}\u{1F9AF}-\u{1F9B3}\u{1F9BC}\u{1F9BD}])|\u{1F469}\u{1F3FF}\u200D\u{1F91D}\u200D[\u{1F468}\u{1F469}][\u{1F3FB}-\u{1F3FE}]|\u{1F469}\u{1F3FE}\u200D\u{1F91D}\u200D[\u{1F468}\u{1F469}][\u{1F3FB}-\u{1F3FD}\u{1F3FF}]|\u{1F469}\u{1F3FD}\u200D\u{1F91D}\u200D[\u{1F468}\u{1F469}][\u{1F3FB}\u{1F3FC}\u{1F3FE}\u{1F3FF}]|\u{1F469}\u{1F3FC}\u200D\u{1F91D}\u200D[\u{1F468}\u{1F469}][\u{1F3FB}\u{1F3FD}-\u{1F3FF}]|\u{1F469}\u{1F3FB}\u200D\u{1F91D}\u200D[\u{1F468}\u{1F469}][\u{1F3FC}-\u{1F3FF}]|\u{1F469}\u200D\u{1F466}\u200D\u{1F466}|\u{1F469}\u200D\u{1F469}\u200D[\u{1F466}\u{1F467}]|(?:\u{1F441}\uFE0F\u200D\u{1F5E8}|\u{1F469}(?:\u{1F3FF}\u200D[\u2695\u2696\u2708]|\u{1F3FE}\u200D[\u2695\u2696\u2708]|\u{1F3FD}\u200D[\u2695\u2696\u2708]|\u{1F3FC}\u200D[\u2695\u2696\u2708]|\u{1F3FB}\u200D[\u2695\u2696\u2708]|\u200D[\u2695\u2696\u2708])|\u{1F3F3}\uFE0F\u200D\u26A7|\u{1F9D1}(?:[\u{1F3FB}-\u{1F3FF}]\u200D[\u2695\u2696\u2708]|\u200D[\u2695\u2696\u2708])|\u{1F43B}\u200D\u2744|(?:[\u{1F3C3}\u{1F3C4}\u{1F3CA}\u{1F46E}\u{1F470}\u{1F471}\u{1F473}\u{1F477}\u{1F481}\u{1F482}\u{1F486}\u{1F487}\u{1F645}-\u{1F647}\u{1F64B}\u{1F64D}\u{1F64E}\u{1F6A3}\u{1F6B4}-\u{1F6B6}\u{1F926}\u{1F935}\u{1F937}-\u{1F939}\u{1F93D}\u{1F93E}\u{1F9B8}\u{1F9B9}\u{1F9CD}-\u{1F9CF}\u{1F9D6}-\u{1F9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91C}\u{1F91E}\u{1F91F}\u{1F930}-\u{1F934}\u{1F936}\u{1F977}\u{1F9B5}\u{1F9B6}\u{1F9BB}\u{1F9D2}-\u{1F9D5}]|[\u{1F3C3}\u{1F3C4}\u{1F3CA}\u{1F46E}\u{1F470}\u{1F471}\u{1F473}\u{1F477}\u{1F481}\u{1F482}\u{1F486}\u{1F487}\u{1F645}-\u{1F647}\u{1F64B}\u{1F64D}\u{1F64E}\u{1F6A3}\u{1F6B4}-\u{1F6B6}\u{1F926}\u{1F935}\u{1F937}-\u{1F939}\u{1F93D}\u{1F93E}\u{1F9B8}\u{1F9B9}\u{1F9CD}-\u{1F9CF}\u{1F9D6}-\u{1F9DD}]|[\u{1F46F}\u{1F93C}\u{1F9DE}\u{1F9DF}]|[\u231A\u231B\u23E9-\u23EC\u23F0\u23F3\u25FD\u25FE\u2614\u2615\u2648-\u2653\u267F\u2693\u26A1\u26AA\u26AB\u26BD\u26BE\u26C4\u26C5\u26CE\u26D4\u26EA\u26F2\u26F3\u26F5\u26FA\u26FD\u2705\u2728\u274C\u274E\u2753-\u2755\u2757\u2795-\u2797\u27B0\u27BF\u2B1B\u2B1C\u2B50\u2B55\u{1F004}\u{1F0CF}\u{1F18E}\u{1F191}-\u{1F19A}\u{1F201}\u{1F21A}\u{1F22F}\u{1F232}-\u{1F236}\u{1F238}-\u{1F23A}\u{1F250}\u{1F251}\u{1F300}-\u{1F320}\u{1F32D}-\u{1F335}\u{1F337}-\u{1F37C}\u{1F37E}-\u{1F384}\u{1F386}-\u{1F393}\u{1F3A0}-\u{1F3C1}\u{1F3C5}\u{1F3C6}\u{1F3C8}\u{1F3C9}\u{1F3CF}-\u{1F3D3}\u{1F3E0}-\u{1F3F0}\u{1F3F8}-\u{1F407}\u{1F409}-\u{1F414}\u{1F416}-\u{1F43A}\u{1F43C}-\u{1F43E}\u{1F440}\u{1F444}\u{1F445}\u{1F451}-\u{1F465}\u{1F46A}\u{1F479}-\u{1F47B}\u{1F47D}-\u{1F480}\u{1F484}\u{1F488}-\u{1F4A9}\u{1F4AB}-\u{1F4FC}\u{1F4FF}-\u{1F53D}\u{1F54B}-\u{1F54E}\u{1F550}-\u{1F567}\u{1F5A4}\u{1F5FB}-\u{1F644}\u{1F648}-\u{1F64A}\u{1F680}-\u{1F6A2}\u{1F6A4}-\u{1F6B3}\u{1F6B7}-\u{1F6BF}\u{1F6C1}-\u{1F6C5}\u{1F6D0}-\u{1F6D2}\u{1F6D5}-\u{1F6D7}\u{1F6EB}\u{1F6EC}\u{1F6F4}-\u{1F6FC}\u{1F7E0}-\u{1F7EB}\u{1F90D}\u{1F90E}\u{1F910}-\u{1F917}\u{1F91D}\u{1F920}-\u{1F925}\u{1F927}-\u{1F92F}\u{1F93A}\u{1F93F}-\u{1F945}\u{1F947}-\u{1F976}\u{1F978}\u{1F97A}-\u{1F9B4}\u{1F9B7}\u{1F9BA}\u{1F9BC}-\u{1F9CB}\u{1F9D0}\u{1F9E0}-\u{1F9FF}\u{1FA70}-\u{1FA74}\u{1FA78}-\u{1FA7A}\u{1FA80}-\u{1FA86}\u{1FA90}-\u{1FAA8}\u{1FAB0}-\u{1FAB6}\u{1FAC0}-\u{1FAC2}\u{1FAD0}-\u{1FAD6}]/gu;
};

const {Client, GatewayIntentBits, Events} = require("discord.js");
const client = new Client({intents: [GatewayIntentBits.Guilds, GatewayIntentBits.GuildMembers, GatewayIntentBits.MessageContent, GatewayIntentBits.GuildMessages, GatewayIntentBits.GuildVoiceStates]});

client.once(Events.ClientReady, c => {
    c.application.commands.set(commands, mySeverID);
	console.log(`Ready! (${c.user.tag})`); // 起動した時に"Ready!"とBotの名前をコンソールに出力する
});

client.on("interactionCreate", interaction => {
    if(interaction.guild.id !== mySeverID) return; // 指定のサーバー以外では動作しないようにする

    if(interaction.commandName === commandNameConnect){

        const {joinVoiceChannel} = require("@discordjs/voice");

        const connection = joinVoiceChannel({
            channelId: zBotVoiceChannelID,
            guildId: interaction.guild.id,
            adapterCreator: interaction.guild.voiceAdapterCreator,
        });

        interaction.reply("こんにちは！zbotです!");
    }

    if(interaction.commandName === commandNameDisconnect){
        const {getVoiceConnection} = require("@discordjs/voice");

        const connection = getVoiceConnection(interaction.channel.guild.id);
        if(!connection){
            interaction.reply("まだ部屋にお呼ばれてません・・・");  
            return;
        }

        connection.destroy();
        interaction.reply("さようなら！また会いましょう!");        
    }
});

client.on(Events.MessageCreate, async(message) => {
    if(message.guild.id !== mySeverID) return; // 指定のサーバー以外では動作しないようにする
    if(message.channel.id !== zBotTextChannelID) return; // 指定のチャネル以外では動作しないようにする
    if(message.author.bot) return; // Botには反応しないようにする

    const {getVoiceConnection} = require("@discordjs/voice");
    const connection = getVoiceConnection(message.channel.guild.id);

    if(!connection) return;

    let text = message.cleanContent;
    text = text.replace(/<:[a-zA-Z0-9_]+:[0-9]+>/g, "");
    text = text.replace(emojiRegex(), "");
    text = text.replace(/(https?|ftp)(:\/\/[\w\/:%#\$&\?\(\)~\.=\+\-]+)/g, "");
    text = text.replace(/\r?\n/g, "、");

    let host = voiceServerGPU;
    if(text.length > 60){
        host = voiceServerCPU;
    }

    const {default: axios} = require("axios");
    const rpc = axios.create({baseURL: `http://${host}/`, proxy: false});

    const audio_query = await rpc.post("audio_query?text=" + encodeURI(text) + "&speaker=" + zundamon, {
        headers:{"accept" : "application/json"},
    });

    const synthesis = await rpc.post("synthesis?speaker=" + zundamon, JSON.stringify(audio_query.data), {
        responseType: "arraybuffer",
        headers: {
            "accept" : "audio/wav",
            "Content-Type" : "application/json"
        }
    });

    //ファイルには書き出さずストリームで直接渡す
    const {Readable} = require("stream");
    const stream = new Readable();
    stream.push(synthesis.data);
    stream.push(null);

    const {createAudioResource, StreamType, createAudioPlayer, NoSubscriberBehavior} = require("@discordjs/voice");

    const resource = createAudioResource(stream, {inputType: StreamType.Arbitrary});

    const player = createAudioPlayer({
        behaviors: {
          noSubscriber: NoSubscriberBehavior.Pause,
        },
    });

    player.play(resource);
    connection.subscribe(player);
});

client.login(myToken);

参考

https://qiita.com/khinatas3/items/0d422c1dd2b8af085827
https://qiita.com/noriokun4649/items/f68c80c184699adcdbf9