music: fix opus base gain extraction

I have no idea how it ended up this mangled.
OxygenCobalt · Jan 14, 2024 · b483391 · b483391
1 parent dea0ee1
commit b483391
Showing 1 changed file with 9 additions and 6 deletions.
diff --git a/app/src/main/java/org/oxycblt/auxio/music/metadata/TagWorker.kt b/app/src/main/java/org/oxycblt/auxio/music/metadata/TagWorker.kt
@@ -105,12 +105,15 @@ private class TagWorkerImpl(
                 format.initializationData.isNotEmpty() &&
                 format.initializationData[0].size >= 18) {
                 val header = format.initializationData[0]
-                val gain = header[1].toInt() or ((header[0].toInt() shl 8) and 0xFF)
-                logD("Obtained opus base gain: ${gain / 256f} dB")
-                rawSong.replayGainTrackAdjustment =
-                    rawSong.replayGainTrackAdjustment?.plus(gain / 256f)
-                rawSong.replayGainAlbumAdjustment =
-                    rawSong.replayGainAlbumAdjustment?.plus(gain / 256f)
+                val gain = (((header[16]).toInt() and 0xFF) or ((header[17].toInt() shl 8))) / 256f
+                logD("Obtained opus base gain: $gain dB")
+                if (gain != 0f) {
+                    logD("Applying opus base gain")
+                    rawSong.replayGainTrackAdjustment =
+                        (rawSong.replayGainTrackAdjustment ?: 0f) + gain
+                    rawSong.replayGainAlbumAdjustment =
+                        (rawSong.replayGainAlbumAdjustment ?: 0f) + gain
+                }
             }
         } else {
             logD("No metadata could be extracted for ${rawSong.name}")