wtvdec: demux thumbnail picture to AVStream.attached_pic

libavformat/wtvdec.c

@@ -414,6 +414,7 @@ static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
     char description[1024];
     unsigned int filesize;
     AVStream *st;
+    int ret;
     int64_t pos = avio_tell(pb);
 
     avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
@@ -430,13 +431,14 @@ static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
     if (!st)
         goto done;
     av_dict_set(&st->metadata, "title", description, 0);
+    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
     st->codec->codec_id   = AV_CODEC_ID_MJPEG;
-    st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
-    st->codec->extradata  = av_mallocz(filesize);
-    if (!st->codec->extradata)
+    ret = av_get_packet(pb, &st->attached_pic, filesize);
+    if (ret < 0)
         goto done;
-    st->codec->extradata_size = filesize;
-    avio_read(pb, st->codec->extradata, filesize);
+    st->attached_pic.stream_index = st->index;
+    st->attached_pic.flags       |= AV_PKT_FLAG_KEY;
+    st->disposition              |= AV_DISPOSITION_ATTACHED_PIC;
 done:
     avio_seek(pb, pos + length, SEEK_SET);
 }