Merge pull request #296 from microsoft/user/xianz/batchSample

unbound output

Author: zhangxiang1993

Samples/BatchSupport/BatchSupport/main.cpp

@@ -63,12 +63,15 @@ int main(int argc, char *argv[]) {
     binding.Bind(inputFeatureDescriptor.Current().Name(), inputVideoFrames);
   }
 
-  // bind output tensor
-  auto outputShape = std::vector<int64_t>{BATCH_SIZE, 1000, 1, 1};
+  // bind output tensor, this step is optional, conmented out in the sample
+  /*
+  auto outputShape = std::vector<int64_t>{ BATCH_SIZE, 1000, 1, 1 };
   auto outputValue = TensorFloat::Create(outputShape);
   std::wstring outputDataBindingName =
-      std::wstring(model.OutputFeatures().First().Current().Name());
+    std::wstring(model.OutputFeatures().First().Current().Name());
   binding.Bind(outputDataBindingName, outputValue);
+  */
+
 
   // now run the model
   printf("Running the model...\n");
@@ -78,6 +81,13 @@ int main(int argc, char *argv[]) {
   printf("model run took %d ticks\n", ticks);
 
   // Print Results
+
+  // conment out three lines below if bind output
+  auto outputValue = results.Outputs().Lookup(L"softmaxout_1").as<TensorFloat>(); // Get outputs by output name
+  auto outputShape = outputValue.Shape();
+  printf("output dimensions [%d, %d, %d, %d]\n", outputShape.GetAt(0), outputShape.GetAt(1), outputShape.GetAt(2), outputShape.GetAt(3));
+  // conment out three lines above if bind output
+
   SampleHelper::PrintResults(outputValue.GetAsVectorView());
 }
 

Samples/BatchSupport/readme.md

@@ -93,4 +93,16 @@ Take binding batches of VideoFrame as example:
 
     // Bind
     binding.Bind(inputFeatureDescriptor.Current().Name(), inputVideoFrames);
+```
+
+### 3. Bind Outputs(optional)
+
+The sample does not bind the output, but you could also bind the output as below:
+```C++
+  auto outputShape = std::vector<int64_t>{BATCH_SIZE, 1000, 1, 1};	
+  auto outputValue = TensorFloat::Create(outputShape);	
+  std::wstring outputDataBindingName =	
+      std::wstring(model.OutputFeatures().First().Current().Name());	
+  binding.Bind(outputDataBindingName, outputValue);
+  SampleHelper::PrintResults(outputValue.GetAsVectorView()); // Print Results
 ```