From f6ea07afd139ecfe76f9a72e4c736d94a1e67820 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 17 Oct 2015 17:00:37 +0300
Subject: [PATCH] Substitute "unknown" if channel language can't be determined

Not all container formats have the appropriate tags.
---
 source/xinestream.cpp | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/source/xinestream.cpp b/source/xinestream.cpp
index 8099f3b..7317f7c 100644
--- a/source/xinestream.cpp
+++ b/source/xinestream.cpp
@@ -172,16 +172,20 @@ void XineStream::update_channels()
 	audio_channels.resize(n_audio);
 	for(unsigned i=0; i<n_audio; ++i)
 	{
-		xine_get_audio_lang(stream, i, langbuf);
-		audio_channels[i].assign(langbuf);
+		if(xine_get_audio_lang(stream, i, langbuf))
+			audio_channels[i].assign(langbuf);
+		else
+			audio_channels[i].assign("unknown");
 	}
 
 	unsigned n_spu = xine_get_stream_info(stream, XINE_STREAM_INFO_MAX_SPU_CHANNEL);
 	spu_channels.resize(n_spu);
 	for(unsigned i=0; i<n_spu; ++i)
 	{
-		xine_get_spu_lang(stream, i, langbuf);
-		spu_channels[i].assign(langbuf);
+		if(xine_get_spu_lang(stream, i, langbuf))
+			spu_channels[i].assign(langbuf);
+		else
+			spu_channels[i].assign("unknown");
 	}
 
 	signal_channels_changed.emit();
-- 
2.43.0