snapshot of https://github.com/RocketChat/Rocket.Chat.git (develop, 2026-09-16; blobs > 131072B omitted)

apps/meteor/client/lib/AudioRecorder.ts

@@ -0,0 +1,91 @@
+import { AudioEncoder } from './AudioEncoder';
+import { settings } from './settings';
+
+export class AudioRecorder {
+	private audioContext: AudioContext | undefined;
+
+	private stream: MediaStream | undefined;
+
+	private encoder: AudioEncoder | undefined;
+
+	isSupported() {
+		return Boolean(navigator.mediaDevices?.getUserMedia) && Boolean(AudioContext);
+	}
+
+	createAudioContext() {
+		if (this.audioContext) {
+			return;
+		}
+
+		this.audioContext = new AudioContext();
+	}
+
+	destroyAudioContext() {
+		if (!this.audioContext) {
+			return;
+		}
+
+		void this.audioContext.close();
+		delete this.audioContext;
+	}
+
+	async createStream() {
+		if (this.stream) {
+			return;
+		}
+
+		this.stream = await navigator.mediaDevices.getUserMedia({ audio: true });
+	}
+
+	destroyStream() {
+		if (!this.stream) {
+			return;
+		}
+
+		this.stream.getAudioTracks().forEach((track) => track.stop());
+		delete this.stream;
+	}
+
+	async createEncoder() {
+		if (this.encoder || !this.audioContext || !this.stream) {
+			return;
+		}
+
+		const input = this.audioContext?.createMediaStreamSource(this.stream);
+		this.encoder = new AudioEncoder(input, { bitRate: settings.peek('Message_Audio_bitRate') || 32 });
+	}
+
+	destroyEncoder() {
+		if (!this.encoder) {
+			return;
+		}
+
+		this.encoder.close();
+		delete this.encoder;
+	}
+
+	async start(cb?: (this: this, done: boolean) => void) {
+		try {
+			this.createAudioContext();
+			await this.createStream();
+			await this.createEncoder();
+			cb?.call(this, true);
+		} catch (error) {
+			console.error(error);
+			this.destroyEncoder();
+			this.destroyStream();
+			this.destroyAudioContext();
+			cb?.call(this, false);
+			throw error;
+		}
+	}
+
+	stop(cb: (data: Blob) => void) {
+		this.encoder?.on('encoded', cb);
+		this.encoder?.close();
+
+		this.destroyEncoder();
+		this.destroyStream();
+		this.destroyAudioContext();
+	}
+}