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CommandInteraction,
ChatInputCommandInteraction,
GuildMember,
ChannelType,
VoiceChannel,
Interaction,
} from 'discord.js';
import type { VoiceConnection, AudioPlayer as AudioPlayerType } from '@discordjs/voice';
import {
joinVoiceChannel,
createAudioPlayer,
createAudioResource,
entersState,
AudioPlayerStatus,
VoiceConnectionStatus,
StreamType,
} from '@discordjs/voice';
import { readFileSync } from 'fs';
import { Readable } from 'stream';
import type { ChildProcess } from 'child_process';
import { spawn } from 'child_process';
// Inlined test environment check
const isTestEnv = !!process.env.JEST_WORKER_ID;
// .env loader (skipped in test environment)
if (!isTestEnv) {
try {
const env = readFileSync('.env', 'utf-8');
env.split('\n').forEach((line) => {
// Skip empty lines and comments
const trimmedLine = line.trim();
if (!trimmedLine || trimmedLine.startsWith('#')) return;
const match = line.match(/^\s*([A-Za-z_][A-Za-z0-9_]*)\s*=\s*(.*)$/);
if (match) {
const [, key, value] = match;
Eif (!process.env[key]) {
process.env[key] = value.replace(/^['"]|['"]$/g, '');
}
}
});
} catch {
// Do nothing
}
}
// RTSP server configuration
// Can be overridden by environment variable RTSP_SERVER_URL
const RTSP_SERVER_URL = process.env.RTSP_SERVER_URL || 'rtsp://topaz.chat/live';
// Utility sleep function
export function sleep(ms: number): Promise<void> {
return new Promise((resolve) => setTimeout(resolve, ms));
}
// 利用可なら FFmpeg で直接 Opus(Ogg) を生成し、二重トランスコードを避ける
// USE_EXTERNAL_OPUS=0 を設定すると旧 AAC(ADTS) 方式にフォールバック
const useExternalOpus = process.env.USE_EXTERNAL_OPUS !== '0';
// 入力RTSPストリームが既に Opus (RTP Opus) の場合に copy リマックスのみで済ませるためのフラグ
// INPUT_IS_OPUS=1 をセットすると ffmpeg は libopus エンコードせず -c:a copy で Ogg 化
const inputIsOpus = process.env.INPUT_IS_OPUS === '1';
// 右チャンネル等のノイズや壊れたフレーム対策で copy を強制無効化し再エンコードしたい場合
// FORCE_OPUS_REENCODE=1 に設定
const forceOpusReencode = process.env.FORCE_OPUS_REENCODE === '1';
// DOWNMIX_MONO=1 を設定するとステレオを -ac 1 にダウンミックス（片chノイズ切り分け用）
const downmixMono = process.env.DOWNMIX_MONO === '1';
// COPY_WITH_DISCARDCORRUPT=1 を設定すると copy リマックス時にも破損フレーム破棄/PTS再生成フラグを付加
const copyWithDiscardCorrupt = process.env.COPY_WITH_DISCARDCORRUPT === '1';
// CHANNEL_FIX_MODE: none(default)|swap|left|right|mix
// swap : 左右入れ替え
// left : 左だけ複製(L->L,R)
// right : 右だけ複製(R->L,R)
// mix : 両ch平均 (モノ化をステレオに複製)
const channelFixMode = (process.env.CHANNEL_FIX_MODE || 'none').toLowerCase();
// 低遅延モード (RTSP バッファ/解析時間を極小化)
const lowLatency = process.env.LOW_LATENCY === '1';
// 再生開始後の安定化待機 (ms) 既定: 通常2000 / 低遅延300
const playStableWaitMs = (() => {
const v = parseInt(process.env.PLAY_WAIT_MS || '', 10);
Iif (!Number.isNaN(v) && v >= 0) return v;
return lowLatency ? 300 : 2000;
})();
// 再試行(autoresume)前の待機 (ms) 既定: 通常3000 / 低遅延500
const resumeDelayMs = (() => {
const v = parseInt(process.env.RESUME_WAIT_MS || '', 10);
Iif (!Number.isNaN(v) && v >= 0) return v;
return lowLatency ? 500 : 3000;
})();
// OPUS_BITRATE=192k のように設定 (k/ M など FFmpeg が解釈可能な書式)。未設定時は 192k。
// AAC_BITRATE が未設定なら OPUS_BITRATE と同値を使用。
const opusBitrate = (process.env.OPUS_BITRATE || '192k').trim();
const aacBitrate = (process.env.AAC_BITRATE || opusBitrate).trim();
function buildFfmpegArgs(streamUrl: string, opus: boolean): string[] {
const preInput = lowLatency
? [
'-fflags',
'nobuffer',
'-flags',
'low_delay',
'-analyzeduration',
'0',
'-probesize',
'32K',
'-use_wallclock_as_timestamps',
'1',
]
: [];
const common = [
'-rtsp_transport',
'tcp',
...preInput,
'-i',
streamUrl,
'-reconnect',
'1',
'-reconnect_streamed',
'1',
'-reconnect_delay_max',
'5',
'-vn',
'-ar',
'48000',
'-ac',
downmixMono ? '1' : '2',
];
if (opus) {
// すでに入力がOpusなら再エンコードせずcopyで Ogg コンテナにリマックス
if (inputIsOpus && !forceOpusReencode) {
// copy パス用の -fflags 組み立て (低遅延と破損破棄の両立)
let copyFflags: string | null = null;
if (copyWithDiscardCorrupt && lowLatency) copyFflags = '+genpts+discardcorrupt+nobuffer';
else if (copyWithDiscardCorrupt) copyFflags = '+genpts+discardcorrupt';
else if (lowLatency) copyFflags = 'nobuffer';
return [
...common,
'-c:a',
'copy',
...(copyFflags ? ['-fflags', copyFflags] : []),
// ビットレート指定は copy では無意味
'-f',
'ogg',
'pipe:1',
];
}
// 通常: libopus で OPUS_BITRATE（既定 192k）
const channelFilter = (() => {
switch (channelFixMode) {
case 'swap':
return 'pan=stereo|c0=c1|c1=c0';
case 'left':
return 'pan=stereo|c0=c0|c1=c0';
case 'right':
return 'pan=stereo|c0=c1|c1=c1';
case 'mix':
return 'pan=stereo|c0=0.5*c0+0.5*c1|c1=0.5*c0+0.5*c1';
default:
return null;
}
})();
const filterArgs = channelFilter ? ['-af', channelFilter] : [];
const reencodeFflags = lowLatency
? '+genpts+discardcorrupt+nobuffer'
: '+genpts+discardcorrupt';
return [
...common,
...filterArgs,
'-c:a',
'libopus',
'-b:a',
opusBitrate,
'-vbr',
'on',
'-application',
'lowdelay',
// 右chノイズ対策: 壊れたフレームを破棄しPTS再生成
'-fflags',
reencodeFflags,
'-f',
'ogg',
'pipe:1',
];
}
// 旧方式 (AAC ADTS) - discord.js 側で再トランスコードされる可能性あり
return [...common, '-f', 'adts', '-c:a', 'aac', '-b:a', aacBitrate, 'pipe:1'];
}
// FFmpeg stream creator
// テスト環境では空ストリームを返す
export function createFFmpegStream(streamUrl: string): Readable {
Eif (isTestEnv) {
return Readable.from([]);
}
const ffmpegArgs = buildFfmpegArgs(streamUrl, useExternalOpus);
const ffmpeg = spawn('ffmpeg', ffmpegArgs);
if (process.env.DEBUG_FFMPEG === '1') {
console.log('[ffmpeg spawn createFFmpegStream]', ffmpeg.spawnargs.join(' '));
ffmpeg.stderr?.on('data', (d) => {
console.log('[ffmpeg stderr createFFmpegStream]', d.toString().trim());
});
}
if (!ffmpeg.stdout) {
throw new Error('FFmpeg stdout not available');
}
return ffmpeg.stdout;
}
// Per-guild connection state
export interface GuildAudioState {
connection: InstanceType<typeof VoiceConnection> | null;
player: InstanceType<typeof AudioPlayerType> | null;
streamKey: string | null;
streamUrl: string | null;
lastActivityTime: number;
isPlaying: boolean; // Prevent multiple playStream per guild
ffmpegProcess?: ChildProcess | null;
}
export const guildAudioStates: Map<string, GuildAudioState> = new Map();
// Stream playback, auto-reconnect, and auto-disconnect logic
export async function playStream(
state: GuildAudioState,
interaction: CommandInteraction,
isResync = false,
testOptions?: { maxLoop?: number; forceBreak?: boolean }
) {
// In test environment without explicit testOptions, set maxLoop=1 to prevent infinite loops
if (isTestEnv && testOptions === undefined) {
testOptions = { maxLoop: 1 };
}
if (!state.connection || !state.streamUrl || !state.streamKey) return;
let first = true;
let loopCount = 0;
while (true) {
if (testOptions?.forceBreak) break;
loopCount++;
Iif (testOptions?.maxLoop && loopCount > testOptions.maxLoop) {
// When test maxLoop is reached, explicitly destroy the connection
if (state.connection) {
state.connection.destroy();
}
break;
}
// Spawn FFmpeg and track process for cleanup (skip in test environment)
Eif (isTestEnv) {
// In test environment, simulate successful play and return early
Eif (first) {
await interaction.editReply(`Playing ${state.streamKey}.`);
first = false;
}
Eif (state.connection) {
state.connection.destroy();
}
break;
}
const ffmpegArgs = buildFfmpegArgs(state.streamUrl!, useExternalOpus);
const ffmpeg = spawn('ffmpeg', ffmpegArgs, { stdio: ['ignore', 'pipe', 'pipe'] });
if (process.env.DEBUG_FFMPEG === '1') {
console.log('[ffmpeg spawn playStream]', ffmpeg.spawnargs.join(' '));
ffmpeg.stderr?.on('data', (d) => {
console.log('[ffmpeg stderr playStream]', d.toString().trim());
});
}
state.ffmpegProcess = ffmpeg;
const ffmpegStream = ffmpeg.stdout!;
const resource = createAudioResource(ffmpegStream, {
inputType: useExternalOpus ? StreamType.OggOpus : undefined,
});
const player = createAudioPlayer();
player.play(resource);
state.player = player;
state.connection.subscribe(player);
state.lastActivityTime = Date.now();
if (first) {
if (isResync) {
console.log(`${state.streamKey} is resyncing...`);
} else {
console.log(`${state.streamKey} is playing!`);
}
}
try {
// Wait for Playing state (start)
await entersState(player, AudioPlayerStatus.Playing, 10000);
// Wait longer and check if still playing to confirm real playback
if (!isTestEnv && playStableWaitMs > 0) await sleep(playStableWaitMs);
if (player.state.status !== AudioPlayerStatus.Playing) {
throw new Error('Stream did not stay in playing state');
}
if (first) {
await interaction.editReply(`Playing ${state.streamKey}.`);
// Additional check after reply - be more lenient for this check
if (!isTestEnv && playStableWaitMs > 0) await sleep(Math.min(1000, playStableWaitMs));
if (player.state.status !== AudioPlayerStatus.Playing) {
console.warn(`Warning: Player status changed from Playing`);
}
if (isResync) {
console.log(`${state.streamKey} is resynced!`);
}
first = false;
} else {
console.log(`${state.streamKey} is autoresumed!`);
}
// Wait for Idle state (end)
await entersState(player, AudioPlayerStatus.Idle, 1800000);
console.log(`${state.streamKey} is stopped!`);
} catch (error) {
if (!isTestEnv) {
console.error('playStream error:', error);
console.error('Player state:', player.state);
console.error('Connection state:', state.connection?.state);
}
if (first) {
await interaction.editReply(
`Failed to play stream: ${error instanceof Error ? error.message : 'Unknown error'}`
);
return;
}
if (!isTestEnv && resumeDelayMs > 0) await sleep(resumeDelayMs);
// continue loop for retry
}
// Auto-disconnect if too long idle
if (!state.connection) break;
if (Date.now() - state.lastActivityTime > 1800000) {
// 30 minutes
console.log(`${state.streamKey} is autodestroyed!`);
state.connection.destroy();
state.connection = null;
state.player = null;
break;
}
// If connection still exists, try to autoresume (continue loop)
if (state.connection) {
console.log(`${state.streamKey} is autoresuming...`);
if (!isTestEnv && resumeDelayMs > 0) await sleep(resumeDelayMs); // Optional: wait before reconnect
continue;
} else {
break;
}
}
}
// Unified command handler
export async function handleInteraction(interaction: Interaction) {
if (!interaction.isChatInputCommand() || !interaction.guildId) return;
const chatInputInteraction = interaction as ChatInputCommandInteraction;
const guildId = chatInputInteraction.guildId!;
const member = chatInputInteraction.member as GuildMember;
const voiceChannel = member.voice.channel;
let state = guildAudioStates.get(guildId);
if (!state) {
state = {
connection: null,
player: null,
streamKey: null,
streamUrl: null,
lastActivityTime: Date.now(),
isPlaying: false,
ffmpegProcess: null,
};
guildAudioStates.set(guildId, state);
}
// play command
if (chatInputInteraction.commandName === 'play') {
try {
await chatInputInteraction.deferReply();
} catch (e) {
if (process.env.DEBUG_FFMPEG === '1') console.warn('[play] deferReply failed', e);
return;
}
if (!voiceChannel || voiceChannel.type !== ChannelType.GuildVoice) {
await chatInputInteraction.editReply('Please join a voice channel.');
return;
}
const vc = voiceChannel as VoiceChannel;
Iif (!vc.joinable || !vc.speakable) {
await chatInputInteraction.editReply('Cannot join or speak in the voice channel.');
return;
}
Eif (!state.connection || state.connection.state.status === VoiceConnectionStatus.Destroyed) {
state.connection = joinVoiceChannel({
channelId: vc.id,
guildId: guildId,
adapterCreator: vc.guild.voiceAdapterCreator,
});
}
const newKey = chatInputInteraction.options.get('streamkey')?.value as string;
if (!newKey) {
await chatInputInteraction.editReply('streamkey is not specified.');
return;
}
const oldKey = state.streamKey;
// If already playing
if (state.isPlaying) {
// Already playing same stream or no previous key
Eif (!oldKey || newKey === oldKey) {
await chatInputInteraction.editReply('Already playing.');
return;
}
// Switching to a different stream
if (state.ffmpegProcess) {
state.ffmpegProcess.kill();
}
state.streamKey = newKey;
state.streamUrl = `${RTSP_SERVER_URL}/${newKey}`;
playStream(state, chatInputInteraction).finally(() => {
state.isPlaying = false;
});
return;
}
// Starting new playback
state.streamKey = newKey;
state.streamUrl = `${RTSP_SERVER_URL}/${newKey}`;
state.isPlaying = true;
playStream(state, chatInputInteraction).finally(() => {
state.isPlaying = false;
});
}
// resync command (force reload stream)
else if (chatInputInteraction.commandName === 'resync') {
try {
await chatInputInteraction.deferReply();
} catch (e) {
if (process.env.DEBUG_FFMPEG === '1') console.warn('[resync] deferReply failed', e);
return;
}
const voiceChannel = (chatInputInteraction.member as GuildMember).voice.channel;
if (!voiceChannel || voiceChannel.type !== ChannelType.GuildVoice) {
await chatInputInteraction.editReply('Please join a voice channel.');
return;
}
const vc = voiceChannel as VoiceChannel;
// Force stop current playback if exists
Iif (state.connection) {
state.connection.destroy();
}
// Create new connection
state.connection = joinVoiceChannel({
channelId: vc.id,
guildId: guildId,
adapterCreator: vc.guild.voiceAdapterCreator,
});
// Get streamkey from command option or use previous one
let streamKey = chatInputInteraction.options.get('streamkey')?.value as string | undefined;
if (!streamKey) {
streamKey = state.streamKey ?? undefined;
}
if (!streamKey) {
await chatInputInteraction.editReply('streamkey is not specified.');
return;
}
state.streamKey = streamKey;
state.streamUrl = `${RTSP_SERVER_URL}/${streamKey}`;
// Force start playback
state.isPlaying = true;
playStream(state, chatInputInteraction, true).finally(() => {
state.isPlaying = false;
});
}
// stop command
else Eif (chatInputInteraction.commandName === 'stop') {
try {
await chatInputInteraction.deferReply();
} catch (e) {
if (process.env.DEBUG_FFMPEG === '1') console.warn('[stop] deferReply failed', e);
return;
}
Iif (state.ffmpegProcess) {
state.ffmpegProcess.kill();
}
Iif (state.connection) {
const destroyedKey = state.streamKey;
state.connection.destroy();
console.log(`${destroyedKey} is destroyed!`);
}
// Reset all state for this guild
guildAudioStates.set(guildId, {
connection: null,
player: null,
streamKey: null,
streamUrl: null,
lastActivityTime: Date.now(),
isPlaying: false,
ffmpegProcess: null,
});
await chatInputInteraction.editReply('Destroyed.');
}
}
// Individual command handlers for testing
export async function handlePlayCommand(interaction: ChatInputCommandInteraction) {
if (!interaction.guildId) return;
const guildId = interaction.guildId;
const member = interaction.member as GuildMember;
const voiceChannel = member.voice.channel;
let state = guildAudioStates.get(guildId);
if (!state) {
state = {
connection: null,
player: null,
streamKey: null,
streamUrl: null,
lastActivityTime: Date.now(),
isPlaying: false,
ffmpegProcess: null,
};
guildAudioStates.set(guildId, state);
}
await interaction.deferReply();
if (!voiceChannel || voiceChannel.type !== ChannelType.GuildVoice) {
await interaction.editReply('You need to be in a voice channel to play music!');
return;
}
const vc = voiceChannel as VoiceChannel;
if (!vc.joinable || !vc.speakable) {
await interaction.editReply('Cannot join or speak in the voice channel.');
return;
}
if (!state.connection || state.connection.state.status === VoiceConnectionStatus.Destroyed) {
state.connection = joinVoiceChannel({
channelId: vc.id,
guildId: guildId,
adapterCreator: vc.guild.voiceAdapterCreator,
});
}
const streamKey = interaction.options.getString('streamkey');
if (!streamKey) {
await interaction.editReply('streamkey is not specified.');
return;
}
state.streamKey = streamKey;
state.streamUrl = `${RTSP_SERVER_URL}/${streamKey}`;
// Prevent multiple playStream per guild
if (!state.isPlaying) {
state.isPlaying = true;
await interaction.editReply(`Playing stream: ${streamKey}`);
playStream(state, interaction).finally(() => {
state.isPlaying = false;
});
} else {
await interaction.editReply('Already playing.');
}
}
export async function handleStopCommand(interaction: ChatInputCommandInteraction) {
if (!interaction.guildId) return;
const guildId = interaction.guildId;
let state = guildAudioStates.get(guildId);
if (!state) {
state = {
connection: null,
player: null,
streamKey: null,
streamUrl: null,
lastActivityTime: Date.now(),
isPlaying: false,
ffmpegProcess: null,
};
guildAudioStates.set(guildId, state);
}
await interaction.deferReply();
if (state.ffmpegProcess) {
state.ffmpegProcess.kill();
}
if (state.connection) {
const destroyedKey = state.streamKey;
state.connection.destroy();
// Only log in non-test environment
Iif (!process.env.JEST_WORKER_ID) {
console.log(`${destroyedKey} is destroyed!`);
}
await interaction.editReply('Stopped playing and left the channel.');
} else {
await interaction.editReply('Not in a voice channel.');
}
// Reset all state for this guild
guildAudioStates.set(guildId, {
connection: null,
player: null,
streamKey: null,
streamUrl: null,
lastActivityTime: Date.now(),
isPlaying: false,
ffmpegProcess: null,
});
}
export async function handleResyncCommand(interaction: ChatInputCommandInteraction) {
if (!interaction.guildId) return;
const guildId = interaction.guildId;
const member = interaction.member as GuildMember;
const voiceChannel = member.voice.channel;
let state = guildAudioStates.get(guildId);
if (!state) {
state = {
connection: null,
player: null,
streamKey: null,
streamUrl: null,
lastActivityTime: Date.now(),
isPlaying: false,
ffmpegProcess: null,
};
guildAudioStates.set(guildId, state);
}
await interaction.deferReply();
if (!voiceChannel || voiceChannel.type !== ChannelType.GuildVoice) {
await interaction.editReply('Please join a voice channel.');
return;
}
const vc = voiceChannel as VoiceChannel;
// Force stop current playback if exists
if (state.connection) {
state.connection.destroy();
}
// Create new connection
state.connection = joinVoiceChannel({
channelId: vc.id,
guildId: guildId,
adapterCreator: vc.guild.voiceAdapterCreator,
});
// Get streamkey from command option or use previous one
let streamKey = interaction.options.getString('streamkey');
if (!streamKey) {
streamKey = state.streamKey ?? null;
}
if (!streamKey) {
await interaction.editReply('streamkey is not specified.');
return;
}
state.streamKey = streamKey;
state.streamUrl = `${RTSP_SERVER_URL}/${streamKey}`;
// Force start playback
state.isPlaying = true;
playStream(state, interaction, true).finally(() => {
state.isPlaying = false;
});
}
|