From 6b8d30038475d6c7f4efff7c3ca25384254400e0 Mon Sep 17 00:00:00 2001
From: Christopher Snowhill <kode54@gmail.com>
Date: Sat, 22 Jan 2022 21:03:52 -0800
Subject: [PATCH] Opus input: Support switching gain modes based on player
 settings, since the Opus tag reader doesn't support Opus gain tags yet

---
 Plugins/Opus/Opus/OpusDecoder.m | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Plugins/Opus/Opus/OpusDecoder.m b/Plugins/Opus/Opus/OpusDecoder.m
index 56684c710..42ee99d3f 100644
--- a/Plugins/Opus/Opus/OpusDecoder.m
+++ b/Plugins/Opus/Opus/OpusDecoder.m
@@ -89,6 +89,17 @@ opus_int64 sourceTell(void *_stream)
 	seekable = op_seekable(opusRef);
 	
 	totalFrames = op_pcm_total(opusRef, -1);
+    
+    NSString * gainMode = [[NSUserDefaults standardUserDefaults] stringForKey:@"volumeScaling"];
+    BOOL isAlbum = [gainMode hasPrefix:@"albumGain"];
+    BOOL isTrack = [gainMode hasPrefix:@"trackGain"];
+    
+    if (isAlbum || isTrack) {
+        op_set_gain_offset(opusRef, isAlbum ? OP_HEADER_GAIN : OP_TRACK_GAIN, 0);
+    }
+    else {
+        op_set_gain_offset(opusRef, OP_ABSOLUTE_GAIN, 0);
+    }
 
 	[self willChangeValueForKey:@"properties"];
 	[self didChangeValueForKey:@"properties"];