cdxl: set channel layout

libavformat/cdxl.c

@@ -19,6 +19,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "libavutil/channel_layout.h"
 #include "libavutil/intreadwrite.h"
 #include "libavutil/parseutils.h"
 #include "libavutil/opt.h"
@@ -101,7 +102,13 @@ static int cdxl_read_packet(AVFormatContext *s, AVPacket *pkt)
             st->codec->codec_type    = AVMEDIA_TYPE_AUDIO;
             st->codec->codec_tag     = 0;
             st->codec->codec_id      = AV_CODEC_ID_PCM_S8;
-            st->codec->channels      = cdxl->header[1] & 0x10 ? 2 : 1;
+            if (cdxl->header[1] & 0x10) {
+                st->codec->channels       = 2;
+                st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
+            } else {
+                st->codec->channels       = 1;
+                st->codec->channel_layout = AV_CH_LAYOUT_MONO;
+            }
             st->codec->sample_rate   = cdxl->sample_rate;
             st->start_time           = 0;
             cdxl->audio_stream_index = st->index;