added OSD audio switching visualization

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@20162 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 34 insertions, 0 deletions

diff --git a/libmpdemux/demux_mkv.c b/libmpdemux/demux_mkv.c
index cc25d712f3..4ebc707b1e 100644
--- a/libmpdemux/demux_mkv.c
+++ b/libmpdemux/demux_mkv.c
@@ -3954,6 +3954,40 @@ demux_mkv_get_sub_lang(demuxer_t *demuxer, int track_num, char *lang,
     }
 }
 
+/** \brief Get the language code for an audio track.
+
+  Retrieves the language code for an audio track if it is known.
+  If the language code is "und" then do not copy it ("und" = "undefined").
+
+  \param demuxer The demuxer to work on
+  \param track_num The n'th audio track to get the language from
+  \param lang Store the language here
+  \param maxlen The maximum number of characters to copy into lang
+*/
+void
+demux_mkv_get_audio_lang(demuxer_t *demuxer, int track_num, char *lang,
+                       int maxlen)
+{
+  mkv_demuxer_t *mkv_d = (mkv_demuxer_t *) demuxer->priv;
+  mkv_track_t *track;
+  int i, num;
+
+  num = 0;
+  for (i = 0; i < mkv_d->num_tracks; i++)
+    {
+      track = mkv_d->tracks[i];
+      if (track->type == MATROSKA_TRACK_AUDIO)
+        num++;
+      if (num == (track_num + 1))
+        {
+          if ((track->language != NULL) &&
+              strcmp(track->language, "und"))
+            strlcpy(lang, track->language, maxlen);
+          return;
+        }
+    }
+}
+
 
 demuxer_desc_t demuxer_desc_matroska = {
   "Matroska demuxer",