From: Dmitry Kurtaev <dmitry.kurtaev+github@gmail.com>
Date: Thu, 5 Dec 2019 16:25:51 +0000 (+0300)
Subject: Backport fix for autodetection of input shapes
X-Git-Tag: accepted/tizen/6.0/unified/20201030.111113~1^2~20^2~22^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=134094a442f2944ccb3605e2f836f3747295acbc;p=platform%2Fupstream%2Fopencv.git

Backport fix for autodetection of input shapes
---

diff --git a/modules/dnn/src/dnn.cpp b/modules/dnn/src/dnn.cpp
index 83b6b9f..cd51282 100644
--- a/modules/dnn/src/dnn.cpp
+++ b/modules/dnn/src/dnn.cpp
@@ -2772,17 +2772,25 @@ struct Net::Impl
     {
         std::vector<LayerPin>& inputLayerIds = layers[id].inputBlobsId;
 
-        if (inOutShapes[0].in[0].empty() && !layers[0].outputBlobs.empty())
+        if (id == 0 && inOutShapes[id].in[0].empty())
         {
-            ShapesVec shapes;
-            for (int i = 0; i < layers[0].outputBlobs.size(); i++)
+            if (!layers[0].outputBlobs.empty())
             {
-                Mat& inp = layers[0].outputBlobs[i];
-                CV_Assert(inp.total());
-                shapes.push_back(shape(inp));
+                ShapesVec shapes;
+                for (int i = 0; i < layers[0].outputBlobs.size(); i++)
+                {
+                    Mat& inp = layers[0].outputBlobs[i];
+                    CV_Assert(inp.total());
+                    shapes.push_back(shape(inp));
+                }
+                inOutShapes[0].in = shapes;
             }
-            inOutShapes[0].in = shapes;
-         }
+            else
+            {
+                inOutShapes[0].out.clear();
+                return;
+            }
+        }
 
         if (inOutShapes[id].in.empty())
         {