add system audio loopback for webaudio

src/i18n/locales/en.json

@@ -1214,6 +1214,8 @@
         "mainText": "drop a file here"
     },
     "visualizer": {
+        "systemAudioCaptureFailed": "Could not start capture: {{message}}",
+        "systemAudioNoAudioTrack": "No audio track was returned. Ensure audio capture is enabled when prompted.",
         "visualizerType": "Visualizer Type",
         "cyclePresets": "Cycle Presets",
         "cycleTime": "Cycle Time (seconds)",

src/main/index.ts

@@ -5,6 +5,7 @@ import {
     app,
     BrowserWindow,
     BrowserWindowConstructorOptions,
+    desktopCapturer,
     globalShortcut,
     ipcMain,
     Menu,
@@ -732,6 +733,22 @@ async function createWindow(first = true): Promise<void> {
         return { action: 'deny' };
     });
 
+    mainWindow.webContents.session.setDisplayMediaRequestHandler((_request, callback) => {
+        desktopCapturer
+            .getSources({ types: ['screen'] })
+            .then((sources) => {
+                if (sources.length > 0) {
+                    callback({ audio: 'loopback', video: sources[0] });
+                } else {
+                    callback({});
+                }
+            })
+            .catch((err) => {
+                log.warn('desktopCapturer.getSources failed', err);
+                callback({});
+            });
+    });
+
     if (!disableAutoUpdates() && store.get('disable_auto_updates') !== true) {
         new AppUpdater();
     }

src/renderer/app.tsx

@@ -11,6 +11,7 @@ import { lazy, memo, Suspense, useEffect, useMemo, useRef, useState } from 'reac
 
 import i18n from '/@/i18n/i18n';
 import { WebAudioContext } from '/@/renderer/features/player/context/webaudio-context';
+import { VisualizerSystemAudioBridge } from '/@/renderer/features/visualizer/components/visualizer-system-audio-bridge';
 import { useCheckForUpdates } from '/@/renderer/hooks/use-check-for-updates';
 import { useNativeMenuSync } from '/@/renderer/hooks/use-native-menu-sync';
 import { useSyncSettingsToMain } from '/@/renderer/hooks/use-sync-settings-to-main';
@@ -79,6 +80,7 @@ const AppShell = memo(function AppShell() {
             <WebAudioContext.Provider value={webAudioProvider}>
                 <PlayerProvider>
                     <AudioPlayers />
+                    <VisualizerSystemAudioBridge />
                     <AppRouter />
                 </PlayerProvider>
             </WebAudioContext.Provider>

src/renderer/features/now-playing/components/sidebar-play-queue.tsx

@@ -27,7 +27,7 @@ import {
 import { ActionIcon, ActionIconGroup } from '/@/shared/components/action-icon/action-icon';
 import { Flex } from '/@/shared/components/flex/flex';
 import { Stack } from '/@/shared/components/stack/stack';
-import { ItemListKey, Platform, PlayerType } from '/@/shared/types/types';
+import { ItemListKey, Platform } from '/@/shared/types/types';
 
 type SidebarPanelType = 'lyrics' | 'queue' | 'visualizer';
 
@@ -55,9 +55,9 @@ export const SidebarPlayQueue = () => {
     const showLyricsInSidebar = useShowLyricsInSidebar();
     const showVisualizerInSidebar = useShowVisualizerInSidebar();
     const sidebarPanelOrder = useSidebarPanelOrder();
-    const { type, webAudio } = usePlaybackSettings();
+    const { webAudio } = usePlaybackSettings();
     const { windowBarStyle } = useWindowSettings();
-    const showVisualizer = showVisualizerInSidebar && type === PlayerType.WEB && webAudio;
+    const showVisualizer = showVisualizerInSidebar && webAudio;
     const showPanel = showLyricsInSidebar || showVisualizer;
 
     const shouldAddTopMargin = isElectron() && windowBarStyle === Platform.WEB;
@@ -374,8 +374,8 @@ const CombinedLyricsAndVisualizerPanel = () => {
     const visualizerType = useSettingsStore((store) => store.visualizer.type);
     const showLyricsInSidebar = useShowLyricsInSidebar();
     const showVisualizerInSidebar = useShowVisualizerInSidebar();
-    const { type, webAudio } = usePlaybackSettings();
-    const showVisualizer = showVisualizerInSidebar && type === PlayerType.WEB && webAudio;
+    const { webAudio } = usePlaybackSettings();
+    const showVisualizer = showVisualizerInSidebar && webAudio;
 
     const { data: lyricsData } = useQuery(
         lyricsQueries.songLyrics(

src/renderer/features/player/components/full-screen-player-queue.tsx

@@ -15,7 +15,7 @@ import {
 } from '/@/renderer/store/full-screen-player.store';
 import { Button } from '/@/shared/components/button/button';
 import { Group } from '/@/shared/components/group/group';
-import { ItemListKey, PlayerType } from '/@/shared/types/types';
+import { ItemListKey } from '/@/shared/types/types';
 
 const AudioMotionAnalyzerVisualizer = lazy(() =>
     import('../../visualizer/components/audiomotionanalyzer/visualizer').then((module) => ({
@@ -33,7 +33,7 @@ export const FullScreenPlayerQueue = () => {
     const { t } = useTranslation();
     const { activeTab, opacity } = useFullScreenPlayerStore();
     const { setStore } = useFullScreenPlayerStoreActions();
-    const { type, webAudio } = usePlaybackSettings();
+    const { webAudio } = usePlaybackSettings();
     const visualizerType = useSettingsStore((store) => store.visualizer.type);
 
     const headerItems = useMemo(() => {
@@ -55,7 +55,7 @@ export const FullScreenPlayerQueue = () => {
             },
         ];
 
-        if (type === PlayerType.WEB && webAudio) {
+        if (webAudio) {
             items.push({
                 active: activeTab === 'visualizer',
                 label: t('page.fullscreenPlayer.visualizer', { postProcess: 'titleCase' }),
@@ -64,7 +64,7 @@ export const FullScreenPlayerQueue = () => {
         }
 
         return items;
-    }, [activeTab, setStore, t, type, webAudio]);
+    }, [activeTab, setStore, t, webAudio]);
 
     return (
         <div
@@ -119,7 +119,7 @@ export const FullScreenPlayerQueue = () => {
                 </div>
             ) : activeTab === 'lyrics' ? (
                 <Lyrics fadeOutNoLyricsMessage={false} />
-            ) : activeTab === 'visualizer' && type === PlayerType.WEB && webAudio ? (
+            ) : activeTab === 'visualizer' && webAudio ? (
                 <Suspense fallback={<></>}>
                     {visualizerType === 'butterchurn' ? (
                         <ButterchurnVisualizer />

src/renderer/features/player/components/full-screen-visualizer.tsx

@@ -13,7 +13,7 @@ import {
     useWindowSettings,
 } from '/@/renderer/store/settings.store';
 import { useHotkeys } from '/@/shared/hooks/use-hotkeys';
-import { Platform, PlayerType } from '/@/shared/types/types';
+import { Platform } from '/@/shared/types/types';
 
 const AudioMotionAnalyzerVisualizer = lazy(() =>
     import('../../visualizer/components/audiomotionanalyzer/visualizer').then((module) => ({
@@ -131,7 +131,7 @@ VisualizerContainer.displayName = 'VisualizerContainer';
 export const FullScreenVisualizer = () => {
     const { setStore } = useFullScreenPlayerStoreActions();
     const { windowBarStyle } = useWindowSettings();
-    const { type, webAudio } = usePlaybackSettings();
+    const { webAudio } = usePlaybackSettings();
     const visualizerType = useSettingsStore((store) => store.visualizer.type);
     const isMobile = useIsMobile();
 
@@ -155,7 +155,7 @@ export const FullScreenVisualizer = () => {
     return (
         <VisualizerContainer isMobile={isMobile} windowBarStyle={windowBarStyle}>
             <div className={styles.visualizerContainer}>
-                {type === PlayerType.WEB && webAudio ? (
+                {webAudio ? (
                     <Suspense fallback={<></>}>
                         {visualizerType === 'butterchurn' ? (
                             <ButterchurnVisualizer />

src/renderer/features/player/hooks/use-visualizer-system-audio.ts

@@ -0,0 +1,138 @@
+import isElectron from 'is-electron';
+import { useCallback, useEffect, useRef } from 'react';
+
+import i18n from '/@/i18n/i18n';
+import { useWebAudio } from '/@/renderer/features/player/hooks/use-webaudio';
+import { usePlaybackType } from '/@/renderer/store/settings.store';
+import { toast } from '/@/shared/components/toast/toast';
+import { PlayerType } from '/@/shared/types/types';
+
+export function useVisualizerSystemAudio() {
+    const playbackType = usePlaybackType();
+    const { setWebAudio, webAudio } = useWebAudio();
+    const webAudioRef = useRef(webAudio);
+    const streamRef = useRef<MediaStream | null>(null);
+    const sourceRef = useRef<MediaStreamAudioSourceNode | null>(null);
+    const connectInFlightRef = useRef(false);
+
+    useEffect(() => {
+        webAudioRef.current = webAudio;
+    }, [webAudio]);
+
+    const disconnect = useCallback(() => {
+        if (streamRef.current) {
+            streamRef.current.getTracks().forEach((t) => t.stop());
+            streamRef.current = null;
+        }
+        if (sourceRef.current) {
+            try {
+                sourceRef.current.disconnect();
+            } catch {
+                // ignore
+            }
+            sourceRef.current = null;
+        }
+        const w = webAudioRef.current;
+        if (w?.visualizerInputs?.length && setWebAudio) {
+            const next = { ...w, visualizerInputs: undefined };
+            setWebAudio(next);
+            webAudioRef.current = next;
+        }
+    }, [setWebAudio]);
+
+    useEffect(() => {
+        if (playbackType === PlayerType.WEB) {
+            disconnect();
+        }
+    }, [playbackType, disconnect]);
+
+    const connect = useCallback(async () => {
+        if (!isElectron()) {
+            return;
+        }
+
+        const w = webAudioRef.current;
+        if (!w?.context || w.context.state === 'closed') {
+            return;
+        }
+
+        if (!setWebAudio) return;
+
+        disconnect();
+
+        const wAfterDisconnect = webAudioRef.current;
+        if (!wAfterDisconnect?.context || wAfterDisconnect.context.state === 'closed') {
+            return;
+        }
+
+        connectInFlightRef.current = true;
+
+        try {
+            const stream = await navigator.mediaDevices.getDisplayMedia({
+                audio: true,
+                video: true,
+            });
+
+            const audioTracks = stream.getAudioTracks();
+            if (audioTracks.length === 0) {
+                stream.getTracks().forEach((t) => t.stop());
+                toast.error({ message: i18n.t('visualizer.systemAudioNoAudioTrack') });
+                return;
+            }
+
+            const latest = webAudioRef.current;
+            if (!latest?.context || latest.context.state === 'closed') {
+                stream.getTracks().forEach((t) => t.stop());
+                return;
+            }
+
+            try {
+                await latest.context.resume();
+            } catch {
+                // ignore
+            }
+
+            const source = latest.context.createMediaStreamSource(stream);
+            streamRef.current = stream;
+            sourceRef.current = source;
+
+            const next = { ...latest, visualizerInputs: [source] };
+            setWebAudio(next);
+            webAudioRef.current = next;
+        } catch (e) {
+            const name = (e as DOMException)?.name;
+            if (name === 'NotAllowedError' || name === 'AbortError') {
+                return;
+            }
+            toast.error({
+                message: i18n.t('visualizer.systemAudioCaptureFailed', {
+                    message: (e as Error).message,
+                }),
+            });
+        } finally {
+            connectInFlightRef.current = false;
+        }
+    }, [disconnect, setWebAudio]);
+
+    const connectRef = useRef(connect);
+    connectRef.current = connect;
+
+    useEffect(() => {
+        if (playbackType !== PlayerType.LOCAL || !isElectron()) {
+            return;
+        }
+
+        const w = webAudioRef.current;
+        if (!w?.context || w.context.state === 'closed') {
+            return;
+        }
+        if (w.visualizerInputs?.length) {
+            return;
+        }
+        if (connectInFlightRef.current) {
+            return;
+        }
+
+        void connectRef.current();
+    }, [playbackType, webAudio?.context, webAudio?.visualizerInputs?.length]);
+}

src/renderer/features/player/utils/get-visualizer-audio-nodes.ts

@@ -0,0 +1,14 @@
+import type { WebAudio } from '/@/shared/types/types';
+
+import { PlayerType } from '/@/shared/types/types';
+
+export function getVisualizerAudioNodes(
+    webAudio: undefined | WebAudio,
+    playbackType: PlayerType,
+): AudioNode[] {
+    if (!webAudio) return [];
+    if (playbackType === PlayerType.LOCAL) {
+        return webAudio.visualizerInputs ?? [];
+    }
+    return webAudio.gains;
+}

src/renderer/features/visualizer/components/audiomotionanalyzer/visualizer.tsx

@@ -3,9 +3,10 @@ import { createRef, useCallback, useEffect, useMemo, useRef, useState } from 're
 import styles from './visualizer.module.css';
 
 import { useWebAudio } from '/@/renderer/features/player/hooks/use-webaudio';
+import { getVisualizerAudioNodes } from '/@/renderer/features/player/utils/get-visualizer-audio-nodes';
 import { openVisualizerSettingsModal } from '/@/renderer/features/player/utils/open-visualizer-settings-modal';
 import { ComponentErrorBoundary } from '/@/renderer/features/shared/components/component-error-boundary';
-import { useAccent, useSettingsStore } from '/@/renderer/store';
+import { useAccent, usePlaybackType, useSettingsStore } from '/@/renderer/store';
 import {
     useFullScreenPlayerStore,
     useFullScreenPlayerStoreActions,
@@ -18,6 +19,7 @@ const VisualizerInner = () => {
     const canvasRef = createRef<HTMLDivElement>();
     const accent = useAccent();
     const visualizer = useSettingsStore((store) => store.visualizer);
+    const playbackType = usePlaybackType();
     const opacity = useSettingsStore((store) => store.visualizer.audiomotionanalyzer.opacity);
     const [motion, setMotion] = useState<any>();
     const [libraryLoaded, setLibraryLoaded] = useState(false);
@@ -214,9 +216,10 @@ const VisualizerInner = () => {
     );
 
     useEffect(() => {
-        const { context, gains } = webAudio || {};
+        const { context } = webAudio || {};
+        const inputNodes = getVisualizerAudioNodes(webAudio, playbackType);
         let audioMotion: any | undefined;
-        if (gains && context && canvasRef.current && !motion && libraryLoaded) {
+        if (inputNodes.length > 0 && context && canvasRef.current && !motion && libraryLoaded) {
             const AudioMotionAnalyzer = AudioMotionAnalyzerRef.current;
             if (!AudioMotionAnalyzer) return;
 
@@ -249,7 +252,7 @@ const VisualizerInner = () => {
             registerCustomGradients(audioMotion);
 
             setMotion(audioMotion);
-            for (const gain of gains) audioMotion.connectInput(gain);
+            for (const node of inputNodes) audioMotion.connectInput(node);
         }
 
         return () => {
@@ -262,6 +265,7 @@ const VisualizerInner = () => {
         accent,
         canvasRef,
         registerCustomGradients,
+        playbackType,
         webAudio,
         visualizer,
         options,

src/renderer/features/visualizer/components/butternchurn/visualizer.tsx

@@ -3,11 +3,13 @@ import { createRef, useCallback, useEffect, useRef, useState } from 'react';
 import styles from './visualizer.module.css';
 
 import { useWebAudio } from '/@/renderer/features/player/hooks/use-webaudio';
+import { getVisualizerAudioNodes } from '/@/renderer/features/player/utils/get-visualizer-audio-nodes';
 import { openVisualizerSettingsModal } from '/@/renderer/features/player/utils/open-visualizer-settings-modal';
 import { ComponentErrorBoundary } from '/@/renderer/features/shared/components/component-error-boundary';
 import {
     subscribeButterchurnPreset,
     useButterchurnSettings,
+    usePlaybackType,
     useSettingsStore,
     useSettingsStoreActions,
 } from '/@/renderer/store';
@@ -19,7 +21,7 @@ import { usePlayerStatus } from '/@/renderer/store/player.store';
 import { ActionIcon } from '/@/shared/components/action-icon/action-icon';
 import { Group } from '/@/shared/components/group/group';
 import { Text } from '/@/shared/components/text/text';
-import { PlayerStatus } from '/@/shared/types/types';
+import { PlayerStatus, PlayerType } from '/@/shared/types/types';
 
 // Ignore presets that are erroring out
 const IGNORED_PRESETS = ['Flexi + Martin - astral projection'];
@@ -56,9 +58,14 @@ const VisualizerInner = () => {
     const initialPresetLoadedRef = useRef(false);
     const butterchurnSettings = useButterchurnSettings();
     const opacity = useSettingsStore((store) => store.visualizer.butterchurn.opacity);
+    const playbackType = usePlaybackType();
     const { setSettings } = useSettingsStoreActions();
     const playerStatus = usePlayerStatus();
     const isPlaying = playerStatus === PlayerStatus.PLAYING;
+    const [webInitGeneration, setWebInitGeneration] = useState(0);
+    const wasPlayingRef = useRef(false);
+    const isFirstWebMountRef = useRef(true);
+    const prevPlaybackTypeRef = useRef(playbackType);
 
     useEffect(() => {
         let isMounted = true;
@@ -89,6 +96,32 @@ const VisualizerInner = () => {
         };
     }, []);
 
+    useEffect(() => {
+        const prevType = prevPlaybackTypeRef.current;
+
+        if (playbackType !== PlayerType.WEB) {
+            prevPlaybackTypeRef.current = playbackType;
+            wasPlayingRef.current = isPlaying;
+            return;
+        }
+
+        if (isFirstWebMountRef.current) {
+            isFirstWebMountRef.current = false;
+            wasPlayingRef.current = isPlaying;
+            prevPlaybackTypeRef.current = playbackType;
+            return;
+        }
+
+        const wasPlaying = wasPlayingRef.current;
+        wasPlayingRef.current = isPlaying;
+
+        if (isPlaying && (!wasPlaying || prevType !== PlayerType.WEB)) {
+            setWebInitGeneration((g) => g + 1);
+        }
+
+        prevPlaybackTypeRef.current = playbackType;
+    }, [playbackType, isPlaying]);
+
     const cleanupVisualizer = () => {
         if (animationFrameRef.current) {
             cancelAnimationFrame(animationFrameRef.current);
@@ -118,17 +151,20 @@ const VisualizerInner = () => {
 
     // Initialize butterchurn instance
     useEffect(() => {
-        const { context, gains } = webAudio || {};
+        const { context } = webAudio || {};
+        const inputNodes = getVisualizerAudioNodes(webAudio, playbackType);
         const canvas = canvasRef.current;
         const container = containerRef.current;
 
+        const shouldRunForWebPlayback = playbackType === PlayerType.WEB && isPlaying;
+        const shouldRunForMpvLoopback = playbackType === PlayerType.LOCAL && inputNodes.length > 0;
+
         const needsInitialization =
             context &&
-            gains &&
-            gains.length > 0 &&
+            inputNodes.length > 0 &&
             canvas &&
             container &&
-            isPlaying &&
+            (shouldRunForWebPlayback || shouldRunForMpvLoopback) &&
             librariesLoaded &&
             (!isInitializedRef.current || !visualizerRef.current);
 
@@ -159,7 +195,8 @@ const VisualizerInner = () => {
         }
 
         async function initializeVisualizer(width: number, height: number) {
-            if (!gains || gains.length === 0 || !canvas || !context || !librariesLoaded) return;
+            const nodes = getVisualizerAudioNodes(webAudio, playbackType);
+            if (!nodes.length || !canvas || !context || !librariesLoaded) return;
 
             canvas.width = width;
             canvas.height = height;
@@ -173,8 +210,8 @@ const VisualizerInner = () => {
                     width,
                 }) as ButterchurnVisualizer;
 
-                for (const gain of gains) {
-                    butterchurnInstance.connectAudio(gain);
+                for (const node of nodes) {
+                    butterchurnInstance.connectAudio(node);
                 }
 
                 visualizerRef.current = butterchurnInstance;
@@ -192,10 +229,18 @@ const VisualizerInner = () => {
             cleanupVisualizer();
         };
         // eslint-disable-next-line react-hooks/exhaustive-deps
-    }, [webAudio, isPlaying, librariesLoaded]);
+    }, [webAudio, playbackType, librariesLoaded, webInitGeneration]);
 
     // Kill visualizer after 5 seconds of pause
     useEffect(() => {
+        if (playbackType === PlayerType.LOCAL) {
+            if (pauseTimerRef.current) {
+                clearTimeout(pauseTimerRef.current);
+                pauseTimerRef.current = undefined;
+            }
+            return;
+        }
+
         if (isPlaying) {
             // Clear pause timer if player resumes
             if (pauseTimerRef.current) {
@@ -220,7 +265,7 @@ const VisualizerInner = () => {
                 pauseTimerRef.current = undefined;
             }
         };
-    }, [isPlaying]);
+    }, [isPlaying, playbackType]);
 
     // Handle resize
     useEffect(() => {
@@ -460,7 +505,7 @@ const VisualizerInner = () => {
         };
     }, [isVisualizerReady, librariesLoaded, butterchurnSettings.blendTime]);
 
-    const shouldRenderContainer = isPlaying || isVisualizerReady;
+    const shouldRenderContainer = isPlaying || isVisualizerReady || !!webAudio;
 
     if (!shouldRenderContainer) {
         return null;

src/renderer/features/visualizer/components/visualizer-system-audio-bridge.tsx

@@ -0,0 +1,6 @@
+import { useVisualizerSystemAudio } from '/@/renderer/features/player/hooks/use-visualizer-system-audio';
+
+export function VisualizerSystemAudioBridge() {
+    useVisualizerSystemAudio();
+    return null;
+}

src/shared/types/types.ts

@@ -288,4 +288,5 @@ export interface UniqueId {
 export type WebAudio = {
     context: AudioContext;
     gains: GainNode[];
+    visualizerInputs?: AudioNode[];
 };