83 lines
2.5 KiB
TypeScript
83 lines
2.5 KiB
TypeScript
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/** GoLive helpers — ported from @dank074/discord-video-stream/utils.js. */
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export function normalizeVideoCodec(
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codec: string,
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): "H264" | "H265" | "VP8" | "VP9" | "AV1" {
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if (/H\.?264|AVC/i.test(codec)) return "H264";
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if (/H\.?265|HEVC/i.test(codec)) return "H265";
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if (/VP(8|9)/i.test(codec)) return codec.toUpperCase() as "VP8" | "VP9";
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if (/AV1/i.test(codec)) return "AV1";
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throw new Error(`Unknown codec: ${codec}`);
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}
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/**
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* The available video streams are sent by the client on connection to the
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* voice gateway using OpCode Identify (0); the server replies with the ssrc
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* and rtxssrc for each available stream using OpCode Ready (2). RID
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* distinguishes simulcast streams of the same video source — we only send one
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* quality stream, so a single entry is hardcoded.
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*/
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export const STREAMS_SIMULCAST = [{ type: "screen", rid: "100", quality: 100 }];
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export const max_int16bit = 2 ** 16;
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export const max_int32bit = 2 ** 32;
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export function isFiniteNonZero(n: unknown): n is number {
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return typeof n === "number" && !!n && Number.isFinite(n);
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}
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export interface ParsedStreamKey {
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type: "guild" | "call";
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channelId: string;
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guildId: string | null;
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userId: string;
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}
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export function parseStreamKey(streamKey: string): ParsedStreamKey {
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const streamKeyArray = streamKey.split(":");
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const type = streamKeyArray.shift();
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if (type !== "guild" && type !== "call") {
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throw new Error(`Invalid stream key type: ${type}`);
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}
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if (
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(type === "guild" && streamKeyArray.length < 3) ||
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(type === "call" && streamKey.length < 2)
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) {
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throw new Error(`Invalid stream key: ${streamKey}`);
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}
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let guildId: string | null = null;
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if (type === "guild") {
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guildId = streamKeyArray.shift() ?? null;
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}
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const channelId = streamKeyArray.shift();
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const userId = streamKeyArray.shift();
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if (!channelId || !userId) {
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throw new Error(`Invalid stream key: ${streamKey}`);
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}
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return { type, channelId, guildId, userId };
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}
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export function generateStreamKey(
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type: "guild" | "call",
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guildId: string | null,
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channelId: string,
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userId: string,
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): string {
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return `${type}${type === "guild" ? `:${guildId}` : ""}:${channelId}:${userId}`;
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}
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export interface VoiceChannelLike {
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type: string;
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id: string;
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guildId?: string | null;
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}
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export function isVoiceChannel(channel: VoiceChannelLike): boolean {
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return (
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channel.type === "DM" ||
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channel.type === "GROUP_DM" ||
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channel.type === "GUILD_STAGE_VOICE" ||
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channel.type === "GUILD_VOICE"
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);
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}
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