avformat/aiffdec: parse replaygain metadata

Signed-off-by: Moritz Barsnick <barsnick@gmx.net>
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavformat/aiffdec.c

@@ -29,6 +29,7 @@
 #include "isom.h"
 #include "id3v2.h"
 #include "mov_chan.h"
+#include "replaygain.h"
 
 #define AIFF                    0
 #define AIFF_C_VERSION1         0xA2805140
@@ -348,6 +349,10 @@ static int aiff_read_header(AVFormatContext *s)
         }
     }
 
+    ret = ff_replaygain_export(st, s->metadata);
+    if (ret < 0)
+        return ret;
+
 got_sound:
     if (!st->codecpar->block_align && st->codecpar->codec_id == AV_CODEC_ID_QCELP) {
         av_log(s, AV_LOG_WARNING, "qcelp without wave chunk, assuming full rate\n");