avfilter/vf_idet: add counts to frame metadata

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavfilter/vf_idet.c

@@ -154,6 +154,7 @@ static int filter_frame(AVFilterLink *link, AVFrame *picref)
 {
     AVFilterContext *ctx = link->dst;
     IDETContext *idet = ctx->priv;
+    AVDictionary **metadata = avpriv_frame_get_metadatap(picref);
 
     if (idet->prev)
         av_frame_free(&idet->prev);
@@ -177,6 +178,11 @@ static int filter_frame(AVFilterLink *link, AVFrame *picref)
 
     filter(ctx);
 
+    av_dict_set_int(metadata, "lavfi.idet.tff", idet->prestat[TFF], 0);
+    av_dict_set_int(metadata, "lavfi.idet.bff", idet->prestat[BFF], 0);
+    av_dict_set_int(metadata, "lavfi.idet.progressive", idet->prestat[PROGRESSIVE], 0);
+    av_dict_set_int(metadata, "lavfi.idet.undetermined", idet->prestat[UNDETERMINED], 0);
+
     return ff_filter_frame(ctx->outputs[0], av_frame_clone(idet->cur));
 }