libvpxenc: report pict_type/error via side-data

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Zern <jzern@google.com>

libavcodec/libvpxenc.c

@@ -690,6 +690,7 @@ static int storeframe(AVCodecContext *avctx, struct FrameListData *cx_frame,
     int ret = ff_alloc_packet2(avctx, pkt, cx_frame->sz, 0);
     uint8_t *side_data;
     if (ret >= 0) {
+        int pict_type;
         memcpy(pkt->data, cx_frame->buf, pkt->size);
         pkt->pts = pkt->dts = cx_frame->pts;
 #if FF_API_CODED_FRAME
@@ -700,20 +701,25 @@ FF_ENABLE_DEPRECATION_WARNINGS
 #endif
 
         if (!!(cx_frame->flags & VPX_FRAME_IS_KEY)) {
+            pict_type = AV_PICTURE_TYPE_I;
 #if FF_API_CODED_FRAME
 FF_DISABLE_DEPRECATION_WARNINGS
-            avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
+            avctx->coded_frame->pict_type = pict_type;
 FF_ENABLE_DEPRECATION_WARNINGS
 #endif
             pkt->flags |= AV_PKT_FLAG_KEY;
         } else {
+            pict_type = AV_PICTURE_TYPE_P;
 #if FF_API_CODED_FRAME
 FF_DISABLE_DEPRECATION_WARNINGS
-            avctx->coded_frame->pict_type = AV_PICTURE_TYPE_P;
+            avctx->coded_frame->pict_type = pict_type;
 FF_ENABLE_DEPRECATION_WARNINGS
 #endif
         }
 
+        ff_side_data_set_encoder_stats(pkt, 0, cx_frame->sse + 1,
+                                       cx_frame->have_sse ? 3 : 0, pict_type);
+
         if (cx_frame->have_sse) {
             int i;
             /* Beware of the Y/U/V/all order! */