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Discord VC: voice channels, transcription, and TTS (#18774)
This commit is contained in:
Shadow
670
src/discord/voice/manager.ts
Normal file
670
src/discord/voice/manager.ts
Normal file
@@ -0,0 +1,670 @@
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import { randomUUID } from "node:crypto";
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import fs from "node:fs/promises";
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import { createRequire } from "node:module";
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import path from "node:path";
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import type { Readable } from "node:stream";
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import { ChannelType, type Client, ReadyListener } from "@buape/carbon";
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import type { VoicePlugin } from "@buape/carbon/voice";
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import {
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AudioPlayerStatus,
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EndBehaviorType,
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VoiceConnectionStatus,
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createAudioPlayer,
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createAudioResource,
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entersState,
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joinVoiceChannel,
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type AudioPlayer,
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type VoiceConnection,
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} from "@discordjs/voice";
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import { resolveAgentDir } from "../../agents/agent-scope.js";
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import type { MsgContext } from "../../auto-reply/templating.js";
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import { agentCommand } from "../../commands/agent.js";
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import type { OpenClawConfig } from "../../config/config.js";
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import type { DiscordAccountConfig, TtsConfig } from "../../config/types.js";
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import { logVerbose, shouldLogVerbose } from "../../globals.js";
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import { formatErrorMessage } from "../../infra/errors.js";
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import { resolvePreferredOpenClawTmpDir } from "../../infra/tmp-openclaw-dir.js";
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import { createSubsystemLogger } from "../../logging/subsystem.js";
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import {
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buildProviderRegistry,
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createMediaAttachmentCache,
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normalizeMediaAttachments,
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runCapability,
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} from "../../media-understanding/runner.js";
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import { resolveAgentRoute } from "../../routing/resolve-route.js";
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import type { RuntimeEnv } from "../../runtime.js";
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import { parseTtsDirectives } from "../../tts/tts-core.js";
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import { resolveTtsConfig, textToSpeech, type ResolvedTtsConfig } from "../../tts/tts.js";
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const require = createRequire(import.meta.url);
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const OpusScript = require("opusscript") as typeof import("opusscript");
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const SAMPLE_RATE = 48_000;
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const CHANNELS = 2;
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const BIT_DEPTH = 16;
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const MIN_SEGMENT_SECONDS = 0.35;
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const SILENCE_DURATION_MS = 1_000;
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const PLAYBACK_READY_TIMEOUT_MS = 15_000;
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const SPEAKING_READY_TIMEOUT_MS = 60_000;
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const logger = createSubsystemLogger("discord/voice");
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const logVoiceVerbose = (message: string) => {
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logVerbose(`discord voice: ${message}`);
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};
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type VoiceOperationResult = {
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ok: boolean;
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message: string;
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channelId?: string;
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guildId?: string;
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};
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type VoiceSessionEntry = {
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guildId: string;
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channelId: string;
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sessionChannelId: string;
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route: ReturnType<typeof resolveAgentRoute>;
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connection: VoiceConnection;
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player: AudioPlayer;
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playbackQueue: Promise<void>;
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processingQueue: Promise<void>;
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activeSpeakers: Set<string>;
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stop: () => void;
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};
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function mergeTtsConfig(base: TtsConfig, override?: TtsConfig): TtsConfig {
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if (!override) {
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return base;
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}
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return {
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...base,
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...override,
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modelOverrides: {
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...base.modelOverrides,
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...override.modelOverrides,
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},
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elevenlabs: {
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...base.elevenlabs,
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...override.elevenlabs,
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voiceSettings: {
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...base.elevenlabs?.voiceSettings,
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...override.elevenlabs?.voiceSettings,
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},
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},
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openai: {
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...base.openai,
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...override.openai,
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},
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edge: {
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...base.edge,
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...override.edge,
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},
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};
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}
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function resolveVoiceTtsConfig(params: { cfg: OpenClawConfig; override?: TtsConfig }): {
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cfg: OpenClawConfig;
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resolved: ResolvedTtsConfig;
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} {
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if (!params.override) {
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return { cfg: params.cfg, resolved: resolveTtsConfig(params.cfg) };
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}
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const base = params.cfg.messages?.tts ?? {};
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const merged = mergeTtsConfig(base, params.override);
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const messages = params.cfg.messages ?? {};
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const cfg = {
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...params.cfg,
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messages: {
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...messages,
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tts: merged,
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},
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};
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return { cfg, resolved: resolveTtsConfig(cfg) };
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}
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function buildWavBuffer(pcm: Buffer): Buffer {
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const blockAlign = (CHANNELS * BIT_DEPTH) / 8;
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const byteRate = SAMPLE_RATE * blockAlign;
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const header = Buffer.alloc(44);
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header.write("RIFF", 0);
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header.writeUInt32LE(36 + pcm.length, 4);
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header.write("WAVE", 8);
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header.write("fmt ", 12);
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header.writeUInt32LE(16, 16);
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header.writeUInt16LE(1, 20);
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header.writeUInt16LE(CHANNELS, 22);
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header.writeUInt32LE(SAMPLE_RATE, 24);
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header.writeUInt32LE(byteRate, 28);
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header.writeUInt16LE(blockAlign, 32);
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header.writeUInt16LE(BIT_DEPTH, 34);
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header.write("data", 36);
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header.writeUInt32LE(pcm.length, 40);
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return Buffer.concat([header, pcm]);
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}
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type OpusDecoder = {
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decode: (buffer: Buffer) => Buffer;
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};
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function createOpusDecoder(): { decoder: OpusDecoder; name: string } | null {
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try {
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const decoder = new OpusScript(SAMPLE_RATE, CHANNELS, OpusScript.Application.AUDIO);
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return { decoder, name: "opusscript" };
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} catch (err) {
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logger.warn(`discord voice: opusscript init failed: ${formatErrorMessage(err)}`);
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}
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try {
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const { OpusEncoder } = require("@discordjs/opus") as typeof import("@discordjs/opus");
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const decoder = new OpusEncoder(SAMPLE_RATE, CHANNELS);
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return { decoder, name: "@discordjs/opus" };
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} catch (err) {
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logger.warn(`discord voice: opus decoder init failed: ${formatErrorMessage(err)}`);
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}
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return null;
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}
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async function decodeOpusStream(stream: Readable): Promise<Buffer> {
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const selected = createOpusDecoder();
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if (!selected) {
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return Buffer.alloc(0);
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}
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logVoiceVerbose(`opus decoder: ${selected.name}`);
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const chunks: Buffer[] = [];
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try {
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for await (const chunk of stream) {
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if (!chunk || !(chunk instanceof Buffer) || chunk.length === 0) {
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continue;
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}
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const decoded = selected.decoder.decode(chunk);
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if (decoded && decoded.length > 0) {
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chunks.push(Buffer.from(decoded));
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}
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}
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} catch (err) {
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if (shouldLogVerbose()) {
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logVerbose(`discord voice: opus decode failed: ${formatErrorMessage(err)}`);
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}
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}
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return chunks.length > 0 ? Buffer.concat(chunks) : Buffer.alloc(0);
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}
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function estimateDurationSeconds(pcm: Buffer): number {
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const bytesPerSample = (BIT_DEPTH / 8) * CHANNELS;
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if (bytesPerSample <= 0) {
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return 0;
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}
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return pcm.length / (bytesPerSample * SAMPLE_RATE);
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}
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async function writeWavFile(pcm: Buffer): Promise<{ path: string; durationSeconds: number }> {
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const tempDir = await fs.mkdtemp(path.join(resolvePreferredOpenClawTmpDir(), "discord-voice-"));
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const filePath = path.join(tempDir, `segment-${randomUUID()}.wav`);
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const wav = buildWavBuffer(pcm);
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await fs.writeFile(filePath, wav);
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scheduleTempCleanup(tempDir);
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return { path: filePath, durationSeconds: estimateDurationSeconds(pcm) };
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}
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function scheduleTempCleanup(tempDir: string, delayMs: number = 30 * 60 * 1000): void {
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const timer = setTimeout(() => {
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fs.rm(tempDir, { recursive: true, force: true }).catch((err) => {
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if (shouldLogVerbose()) {
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logVerbose(`discord voice: temp cleanup failed for ${tempDir}: ${formatErrorMessage(err)}`);
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}
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});
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}, delayMs);
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timer.unref();
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}
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async function transcribeAudio(params: {
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cfg: OpenClawConfig;
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agentId: string;
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filePath: string;
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}): Promise<string | undefined> {
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const ctx: MsgContext = {
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MediaPath: params.filePath,
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MediaType: "audio/wav",
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};
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const attachments = normalizeMediaAttachments(ctx);
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if (attachments.length === 0) {
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return undefined;
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}
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const cache = createMediaAttachmentCache(attachments);
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const providerRegistry = buildProviderRegistry();
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try {
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const result = await runCapability({
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capability: "audio",
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cfg: params.cfg,
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ctx,
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attachments: cache,
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media: attachments,
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agentDir: resolveAgentDir(params.cfg, params.agentId),
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providerRegistry,
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config: params.cfg.tools?.media?.audio,
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});
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const output = result.outputs.find((entry) => entry.kind === "audio.transcription");
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const text = output?.text?.trim();
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return text || undefined;
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} finally {
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await cache.cleanup();
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}
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}
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export class DiscordVoiceManager {
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private sessions = new Map<string, VoiceSessionEntry>();
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private botUserId?: string;
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private readonly voiceEnabled: boolean;
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private autoJoinTask: Promise<void> | null = null;
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constructor(
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private params: {
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client: Client;
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cfg: OpenClawConfig;
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discordConfig: DiscordAccountConfig;
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accountId: string;
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runtime: RuntimeEnv;
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botUserId?: string;
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},
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) {
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this.botUserId = params.botUserId;
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this.voiceEnabled = params.discordConfig.voice?.enabled !== false;
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}
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setBotUserId(id?: string) {
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if (id) {
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this.botUserId = id;
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}
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}
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isEnabled() {
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return this.voiceEnabled;
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}
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async autoJoin(): Promise<void> {
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if (!this.voiceEnabled) {
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return;
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}
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if (this.autoJoinTask) {
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return this.autoJoinTask;
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}
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this.autoJoinTask = (async () => {
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const entries = this.params.discordConfig.voice?.autoJoin ?? [];
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logVoiceVerbose(`autoJoin: ${entries.length} entries`);
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const seenGuilds = new Set<string>();
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for (const entry of entries) {
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const guildId = entry.guildId.trim();
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if (!guildId) {
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continue;
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}
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if (seenGuilds.has(guildId)) {
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logger.warn(
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`discord voice: autoJoin has multiple entries for guild ${guildId}; skipping`,
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);
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continue;
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}
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seenGuilds.add(guildId);
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logVoiceVerbose(`autoJoin: joining guild ${guildId} channel ${entry.channelId}`);
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await this.join({
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guildId: entry.guildId,
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channelId: entry.channelId,
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});
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}
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})().finally(() => {
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this.autoJoinTask = null;
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});
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return this.autoJoinTask;
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}
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status(): VoiceOperationResult[] {
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return Array.from(this.sessions.values()).map((session) => ({
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ok: true,
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message: `connected: guild ${session.guildId} channel ${session.channelId}`,
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guildId: session.guildId,
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channelId: session.channelId,
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}));
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}
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async join(params: { guildId: string; channelId: string }): Promise<VoiceOperationResult> {
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if (!this.voiceEnabled) {
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return {
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ok: false,
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message: "Discord voice is disabled (channels.discord.voice.enabled).",
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};
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}
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const guildId = params.guildId.trim();
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const channelId = params.channelId.trim();
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if (!guildId || !channelId) {
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return { ok: false, message: "Missing guildId or channelId." };
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}
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logVoiceVerbose(`join requested: guild ${guildId} channel ${channelId}`);
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const existing = this.sessions.get(guildId);
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if (existing && existing.channelId === channelId) {
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logVoiceVerbose(`join: already connected to guild ${guildId} channel ${channelId}`);
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return { ok: true, message: `Already connected to <#${channelId}>.`, guildId, channelId };
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}
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if (existing) {
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logVoiceVerbose(`join: replacing existing session for guild ${guildId}`);
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await this.leave({ guildId });
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}
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const channelInfo = await this.params.client.fetchChannel(channelId).catch(() => null);
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if (!channelInfo || ("type" in channelInfo && !isVoiceChannel(channelInfo.type))) {
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return { ok: false, message: `Channel ${channelId} is not a voice channel.` };
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}
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const channelGuildId = "guildId" in channelInfo ? channelInfo.guildId : undefined;
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if (channelGuildId && channelGuildId !== guildId) {
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return { ok: false, message: "Voice channel is not in this guild." };
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}
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const voicePlugin = this.params.client.getPlugin<VoicePlugin>("voice");
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if (!voicePlugin) {
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return { ok: false, message: "Discord voice plugin is not available." };
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}
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const adapterCreator = voicePlugin.getGatewayAdapterCreator(guildId);
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const connection = joinVoiceChannel({
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channelId,
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guildId,
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adapterCreator,
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selfDeaf: false,
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selfMute: false,
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});
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try {
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await entersState(connection, VoiceConnectionStatus.Ready, PLAYBACK_READY_TIMEOUT_MS);
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logVoiceVerbose(`join: connected to guild ${guildId} channel ${channelId}`);
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} catch (err) {
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connection.destroy();
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return { ok: false, message: `Failed to join voice channel: ${formatErrorMessage(err)}` };
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}
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const sessionChannelId = channelInfo?.id ?? channelId;
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// Use the voice channel id as the session channel so text chat in the voice channel
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// shares the same session as spoken audio.
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if (sessionChannelId !== channelId) {
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logVoiceVerbose(
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`join: using session channel ${sessionChannelId} for voice channel ${channelId}`,
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);
|
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}
|
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const route = resolveAgentRoute({
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cfg: this.params.cfg,
|
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channel: "discord",
|
||||
accountId: this.params.accountId,
|
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guildId,
|
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peer: { kind: "channel", id: sessionChannelId },
|
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});
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const player = createAudioPlayer();
|
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connection.subscribe(player);
|
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|
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const entry: VoiceSessionEntry = {
|
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guildId,
|
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channelId,
|
||||
sessionChannelId,
|
||||
route,
|
||||
connection,
|
||||
player,
|
||||
playbackQueue: Promise.resolve(),
|
||||
processingQueue: Promise.resolve(),
|
||||
activeSpeakers: new Set(),
|
||||
stop: () => {
|
||||
player.stop();
|
||||
connection.destroy();
|
||||
},
|
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};
|
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|
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const speakingHandler = (userId: string) => {
|
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void this.handleSpeakingStart(entry, userId).catch((err) => {
|
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logger.warn(`discord voice: capture failed: ${formatErrorMessage(err)}`);
|
||||
});
|
||||
};
|
||||
|
||||
connection.receiver.speaking.on("start", speakingHandler);
|
||||
connection.on(VoiceConnectionStatus.Disconnected, async () => {
|
||||
try {
|
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await Promise.race([
|
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entersState(connection, VoiceConnectionStatus.Signalling, 5_000),
|
||||
entersState(connection, VoiceConnectionStatus.Connecting, 5_000),
|
||||
]);
|
||||
} catch {
|
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this.sessions.delete(guildId);
|
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connection.destroy();
|
||||
}
|
||||
});
|
||||
connection.on(VoiceConnectionStatus.Destroyed, () => {
|
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this.sessions.delete(guildId);
|
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});
|
||||
|
||||
player.on("error", (err) => {
|
||||
logger.warn(`discord voice: playback error: ${formatErrorMessage(err)}`);
|
||||
});
|
||||
|
||||
this.sessions.set(guildId, entry);
|
||||
return {
|
||||
ok: true,
|
||||
message: `Joined <#${channelId}>.`,
|
||||
guildId,
|
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channelId,
|
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};
|
||||
}
|
||||
|
||||
async leave(params: { guildId: string; channelId?: string }): Promise<VoiceOperationResult> {
|
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const guildId = params.guildId.trim();
|
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logVoiceVerbose(`leave requested: guild ${guildId} channel ${params.channelId ?? "current"}`);
|
||||
const entry = this.sessions.get(guildId);
|
||||
if (!entry) {
|
||||
return { ok: false, message: "Not connected to a voice channel." };
|
||||
}
|
||||
if (params.channelId && params.channelId !== entry.channelId) {
|
||||
return { ok: false, message: "Not connected to that voice channel." };
|
||||
}
|
||||
entry.stop();
|
||||
this.sessions.delete(guildId);
|
||||
logVoiceVerbose(`leave: disconnected from guild ${guildId} channel ${entry.channelId}`);
|
||||
return {
|
||||
ok: true,
|
||||
message: `Left <#${entry.channelId}>.`,
|
||||
guildId,
|
||||
channelId: entry.channelId,
|
||||
};
|
||||
}
|
||||
|
||||
async destroy(): Promise<void> {
|
||||
for (const entry of this.sessions.values()) {
|
||||
entry.stop();
|
||||
}
|
||||
this.sessions.clear();
|
||||
}
|
||||
|
||||
private enqueueProcessing(entry: VoiceSessionEntry, task: () => Promise<void>) {
|
||||
entry.processingQueue = entry.processingQueue
|
||||
.then(task)
|
||||
.catch((err) => logger.warn(`discord voice: processing failed: ${formatErrorMessage(err)}`));
|
||||
}
|
||||
|
||||
private enqueuePlayback(entry: VoiceSessionEntry, task: () => Promise<void>) {
|
||||
entry.playbackQueue = entry.playbackQueue
|
||||
.then(task)
|
||||
.catch((err) => logger.warn(`discord voice: playback failed: ${formatErrorMessage(err)}`));
|
||||
}
|
||||
|
||||
private async handleSpeakingStart(entry: VoiceSessionEntry, userId: string) {
|
||||
if (!userId || entry.activeSpeakers.has(userId)) {
|
||||
return;
|
||||
}
|
||||
if (this.botUserId && userId === this.botUserId) {
|
||||
return;
|
||||
}
|
||||
|
||||
entry.activeSpeakers.add(userId);
|
||||
logVoiceVerbose(
|
||||
`capture start: guild ${entry.guildId} channel ${entry.channelId} user ${userId}`,
|
||||
);
|
||||
if (entry.player.state.status === AudioPlayerStatus.Playing) {
|
||||
entry.player.stop(true);
|
||||
}
|
||||
|
||||
const stream = entry.connection.receiver.subscribe(userId, {
|
||||
end: {
|
||||
behavior: EndBehaviorType.AfterSilence,
|
||||
duration: SILENCE_DURATION_MS,
|
||||
},
|
||||
});
|
||||
stream.on("error", (err) => {
|
||||
logger.warn(`discord voice: receive error: ${formatErrorMessage(err)}`);
|
||||
});
|
||||
|
||||
try {
|
||||
const pcm = await decodeOpusStream(stream);
|
||||
if (pcm.length === 0) {
|
||||
logVoiceVerbose(
|
||||
`capture empty: guild ${entry.guildId} channel ${entry.channelId} user ${userId}`,
|
||||
);
|
||||
return;
|
||||
}
|
||||
const { path: wavPath, durationSeconds } = await writeWavFile(pcm);
|
||||
if (durationSeconds < MIN_SEGMENT_SECONDS) {
|
||||
logVoiceVerbose(
|
||||
`capture too short (${durationSeconds.toFixed(2)}s): guild ${entry.guildId} channel ${entry.channelId} user ${userId}`,
|
||||
);
|
||||
return;
|
||||
}
|
||||
logVoiceVerbose(
|
||||
`capture ready (${durationSeconds.toFixed(2)}s): guild ${entry.guildId} channel ${entry.channelId} user ${userId}`,
|
||||
);
|
||||
this.enqueueProcessing(entry, async () => {
|
||||
await this.processSegment({ entry, wavPath, userId, durationSeconds });
|
||||
});
|
||||
} finally {
|
||||
entry.activeSpeakers.delete(userId);
|
||||
}
|
||||
}
|
||||
|
||||
private async processSegment(params: {
|
||||
entry: VoiceSessionEntry;
|
||||
wavPath: string;
|
||||
userId: string;
|
||||
durationSeconds: number;
|
||||
}) {
|
||||
const { entry, wavPath, userId, durationSeconds } = params;
|
||||
logVoiceVerbose(
|
||||
`segment processing (${durationSeconds.toFixed(2)}s): guild ${entry.guildId} channel ${entry.channelId}`,
|
||||
);
|
||||
const transcript = await transcribeAudio({
|
||||
cfg: this.params.cfg,
|
||||
agentId: entry.route.agentId,
|
||||
filePath: wavPath,
|
||||
});
|
||||
if (!transcript) {
|
||||
logVoiceVerbose(
|
||||
`transcription empty: guild ${entry.guildId} channel ${entry.channelId} user ${userId}`,
|
||||
);
|
||||
return;
|
||||
}
|
||||
logVoiceVerbose(
|
||||
`transcription ok (${transcript.length} chars): guild ${entry.guildId} channel ${entry.channelId}`,
|
||||
);
|
||||
|
||||
const speakerLabel = await this.resolveSpeakerLabel(entry.guildId, userId);
|
||||
const prompt = speakerLabel ? `${speakerLabel}: ${transcript}` : transcript;
|
||||
|
||||
const result = await agentCommand(
|
||||
{
|
||||
message: prompt,
|
||||
sessionKey: entry.route.sessionKey,
|
||||
agentId: entry.route.agentId,
|
||||
messageChannel: "discord",
|
||||
deliver: false,
|
||||
},
|
||||
this.params.runtime,
|
||||
);
|
||||
|
||||
const replyText = (result.payloads ?? [])
|
||||
.map((payload) => payload.text)
|
||||
.filter((text) => typeof text === "string" && text.trim())
|
||||
.join("\n")
|
||||
.trim();
|
||||
|
||||
if (!replyText) {
|
||||
logVoiceVerbose(
|
||||
`reply empty: guild ${entry.guildId} channel ${entry.channelId} user ${userId}`,
|
||||
);
|
||||
return;
|
||||
}
|
||||
logVoiceVerbose(
|
||||
`reply ok (${replyText.length} chars): guild ${entry.guildId} channel ${entry.channelId}`,
|
||||
);
|
||||
|
||||
const { cfg: ttsCfg, resolved: ttsConfig } = resolveVoiceTtsConfig({
|
||||
cfg: this.params.cfg,
|
||||
override: this.params.discordConfig.voice?.tts,
|
||||
});
|
||||
const directive = parseTtsDirectives(replyText, ttsConfig.modelOverrides);
|
||||
const speakText = directive.overrides.ttsText ?? directive.cleanedText.trim();
|
||||
if (!speakText) {
|
||||
logVoiceVerbose(
|
||||
`tts skipped (empty): guild ${entry.guildId} channel ${entry.channelId} user ${userId}`,
|
||||
);
|
||||
return;
|
||||
}
|
||||
|
||||
const ttsResult = await textToSpeech({
|
||||
text: speakText,
|
||||
cfg: ttsCfg,
|
||||
channel: "discord",
|
||||
overrides: directive.overrides,
|
||||
});
|
||||
if (!ttsResult.success || !ttsResult.audioPath) {
|
||||
logger.warn(`discord voice: TTS failed: ${ttsResult.error ?? "unknown error"}`);
|
||||
return;
|
||||
}
|
||||
logVoiceVerbose(
|
||||
`tts ok (${speakText.length} chars): guild ${entry.guildId} channel ${entry.channelId}`,
|
||||
);
|
||||
|
||||
this.enqueuePlayback(entry, async () => {
|
||||
logVoiceVerbose(
|
||||
`playback start: guild ${entry.guildId} channel ${entry.channelId} file ${path.basename(ttsResult.audioPath)}`,
|
||||
);
|
||||
const resource = createAudioResource(ttsResult.audioPath);
|
||||
entry.player.play(resource);
|
||||
await entersState(entry.player, AudioPlayerStatus.Playing, PLAYBACK_READY_TIMEOUT_MS).catch(
|
||||
() => undefined,
|
||||
);
|
||||
await entersState(entry.player, AudioPlayerStatus.Idle, SPEAKING_READY_TIMEOUT_MS).catch(
|
||||
() => undefined,
|
||||
);
|
||||
logVoiceVerbose(`playback done: guild ${entry.guildId} channel ${entry.channelId}`);
|
||||
});
|
||||
}
|
||||
|
||||
private async resolveSpeakerLabel(guildId: string, userId: string): Promise<string | undefined> {
|
||||
try {
|
||||
const member = await this.params.client.fetchMember(guildId, userId);
|
||||
return member.nickname ?? member.user?.globalName ?? member.user?.username ?? userId;
|
||||
} catch {
|
||||
try {
|
||||
const user = await this.params.client.fetchUser(userId);
|
||||
return user.globalName ?? user.username ?? userId;
|
||||
} catch {
|
||||
return userId;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
export class DiscordVoiceReadyListener extends ReadyListener {
|
||||
constructor(private manager: DiscordVoiceManager) {
|
||||
super();
|
||||
}
|
||||
|
||||
async handle() {
|
||||
await this.manager.autoJoin();
|
||||
}
|
||||
}
|
||||
|
||||
function isVoiceChannel(type: ChannelType) {
|
||||
return type === ChannelType.GuildVoice || type === ChannelType.GuildStageVoice;
|
||||
}
|
||||
Reference in New Issue
Block a user