iss: set channel layout

libavformat/iss.c

@@ -26,6 +26,7 @@
  * @see http://wiki.multimedia.cx/index.php?title=FunCom_ISS
  */
 
+#include "libavutil/channel_layout.h"
 #include "avformat.h"
 #include "internal.h"
 #include "libavutil/avstring.h"
@@ -94,7 +95,13 @@ static av_cold int iss_read_header(AVFormatContext *s)
         return AVERROR(ENOMEM);
     st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
     st->codec->codec_id = AV_CODEC_ID_ADPCM_IMA_ISS;
-    st->codec->channels = stereo ? 2 : 1;
+    if (stereo) {
+        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 = 44100;
     if(rate_divisor > 0)
          st->codec->sample_rate /= rate_divisor;