From 60d53cf87b3dae057b3d69720ffdc61011afc4d4 Mon Sep 17 00:00:00 2001
From: Julien Maille <julien.maille@gmail.com>
Date: Thu, 29 Jan 2026 22:07:20 +0100
Subject: [PATCH] Implement quality fallback on playback error (fix for Firefox
 blob/DASH issues)

---
 js/events.js | 46 +++++++++++++++++++++++++++++++++++++++++++++-
 js/player.js |  1 +
 2 files changed, 46 insertions(+), 1 deletion(-)

diff --git a/js/events.js b/js/events.js
index b798e4a..a82166a 100644
--- a/js/events.js
+++ b/js/events.js
@@ -113,10 +113,54 @@ export function initializePlayerEvents(player, audioPlayer, scrobbler, ui) {
         player.updateMediaSessionPositionState();
     });
 
-    audioPlayer.addEventListener('error', (e) => {
+    audioPlayer.addEventListener('error', async (e) => {
         console.error('Audio playback error:', e);
         playPauseBtn.innerHTML = SVG_PLAY;
 
+        const currentQuality = player.quality;
+
+        // Check if we can fallback to a lower quality
+        if (
+            player.currentTrack &&
+            currentQuality === 'HI_RES_LOSSLESS' &&
+            !player.currentTrack.isLocal &&
+            !player.currentTrack.isTracker &&
+            !player.isFallbackRetry
+        ) {
+            console.warn('Playback failed, attempting fallback to LOSSLESS quality...');
+            player.isFallbackRetry = true; // Set flag to prevent infinite loops
+
+            try {
+                // Force getTrack to fetch new URL for LOSSLESS
+                const trackId = player.currentTrack.id;
+
+                // Fetch new stream URL
+                const newStreamUrl = await player.api.getStreamUrl(trackId, 'LOSSLESS');
+
+                if (newStreamUrl) {
+                    // Reset player state for standard playback (non-DASH if possible)
+                    if (player.dashInitialized) {
+                        player.dashPlayer.reset();
+                        player.dashInitialized = false;
+                    }
+
+                    audioPlayer.src = newStreamUrl;
+                    audioPlayer.load();
+                    await audioPlayer.play();
+
+                    // Reset flag after successful start
+                    setTimeout(() => {
+                        player.isFallbackRetry = false;
+                    }, 5000);
+                    return; // Successfully handled
+                }
+            } catch (fallbackError) {
+                console.error('Fallback failed:', fallbackError);
+            }
+        }
+
+        player.isFallbackRetry = false;
+
         // Skip to next track on error to prevent queue stalling
         if (player.currentTrack) {
             console.warn('Skipping to next track due to playback error');
diff --git a/js/player.js b/js/player.js
index 37806c9..5c42441 100644
--- a/js/player.js
+++ b/js/player.js
@@ -26,6 +26,7 @@ export class Player {
         this.currentTrack = null;
         this.currentRgValues = null;
         this.userVolume = parseFloat(localStorage.getItem('volume') || '0.7');
+        this.isFallbackRetry = false;
 
         // Sleep timer properties
         this.sleepTimer = null;