From cf6d8435723dae85f7be75046caf7c9132fd328a Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Sat, 26 Nov 2016 02:06:15 +0900
Subject: [PATCH] vorbis: Return error when decoding fails

---
 audio/vorbis/decode_js.go | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/audio/vorbis/decode_js.go b/audio/vorbis/decode_js.go
index 1717ad885..f9002c5a2 100644
--- a/audio/vorbis/decode_js.go
+++ b/audio/vorbis/decode_js.go
@@ -86,7 +86,7 @@ func Decode(context *audio.Context, src audio.ReadSeekCloser) (*Stream, error) {
 		return nil, err
 	}
 	s := &Stream{}
-	ch := make(chan struct{})
+	ch := make(chan error)
 
 	klass := js.Global.Get("OfflineAudioContext")
 	if klass == js.Undefined {
@@ -102,7 +102,12 @@ func Decode(context *audio.Context, src audio.ReadSeekCloser) (*Stream, error) {
 		s.leftData = buf.Call("getChannelData", 0).Interface().([]float32)
 		s.rightData = buf.Call("getChannelData", 1).Interface().([]float32)
 		close(ch)
+	}, func() {
+		ch <- errors.New("vorbis: decodeAudioData failed (Safari might not be able to decode Ogg/Vorbis).")
+		close(ch)
 	})
-	<-ch
+	if err := <-ch; err != nil {
+		return nil, err
+	}
 	return s, nil
 }