From fa17b4da6b74624ab7451a92353c886e97c4482b Mon Sep 17 00:00:00 2001
From: Tsuda Kageyu <tsuda.kageyu@gmail.com>
Date: Thu, 18 Jun 2015 19:27:21 +0900
Subject: [PATCH] Avoid overwriting the audio stream when adding an ID3v1 tag
 to a FLAC file.

---
 taglib/flac/flacfile.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/taglib/flac/flacfile.cpp b/taglib/flac/flacfile.cpp
index dbf0d767..4d2d69e6 100644
--- a/taglib/flac/flacfile.cpp
+++ b/taglib/flac/flacfile.cpp
@@ -258,8 +258,16 @@ bool FLAC::File::save()
   }
 
   if(ID3v1Tag()) {
-    seek(-128, End);
+    if(d->hasID3v1) {
+      seek(d->ID3v1Location);
+    }
+    else {
+      seek(0, End);
+      d->ID3v1Location = tell();
+    }
+
     writeBlock(ID3v1Tag()->render());
+    d->hasID3v1 = true;
   }
 
   return true;