IVGCVSW-3932 Add frontend for INSTANCE_NORMALIZATION

Signed-off-by: Kevin May <kevin.may@arm.com>
Change-Id: Ib152148ccd8d2733c617d0cf9402661fc6b71316

2 files changed, 95 insertions, 0 deletions

diff --git a/src/armnn/layers/InstanceNormalizationLayer.cpp b/src/armnn/layers/InstanceNormalizationLayer.cpp
new file mode 100644
index 0000000000..fc3044af50
--- /dev/null
+++ b/src/armnn/layers/InstanceNormalizationLayer.cpp
@@ -0,0 +1,52 @@
+//
+// Copyright © 2019 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+#include "InstanceNormalizationLayer.hpp"
+
+#include "LayerCloneBase.hpp"
+
+#include <armnn/TypesUtils.hpp>
+#include <backendsCommon/WorkloadData.hpp>
+#include <backendsCommon/WorkloadFactory.hpp>
+
+namespace armnn
+{
+
+InstanceNormalizationLayer::InstanceNormalizationLayer(const InstanceNormalizationDescriptor& param, const char* name)
+    : LayerWithParameters(1, 1, LayerType::InstanceNormalization, param, name)
+{
+}
+
+std::unique_ptr<IWorkload> InstanceNormalizationLayer::CreateWorkload(const Graph& graph,
+    const IWorkloadFactory& factory) const
+{
+    InstanceNormalizationQueueDescriptor descriptor;
+    return factory.CreateInstanceNormalization(descriptor, PrepInfoAndDesc(descriptor, graph));
+}
+
+InstanceNormalizationLayer* InstanceNormalizationLayer::Clone(Graph& graph) const
+{
+    return CloneBase<InstanceNormalizationLayer>(graph, m_Param, GetName());
+}
+
+void InstanceNormalizationLayer::ValidateTensorShapesFromInputs()
+{
+    VerifyLayerConnections(1, CHECK_LOCATION());
+
+    auto inferredShapes = InferOutputShapes({ GetInputSlot(0).GetConnection()->GetTensorInfo().GetShape() });
+
+    BOOST_ASSERT(inferredShapes.size() == 1);
+
+    ConditionalThrowIfNotEqual<LayerValidationException>(
+        "InstanceNormalizationLayer: TensorShape set on OutputSlot[0] does not match the inferred shape.",
+        GetOutputSlot(0).GetTensorInfo().GetShape(),
+        inferredShapes[0]);
+}
+
+void InstanceNormalizationLayer::Accept(ILayerVisitor& visitor) const
+{
+    visitor.VisitInstanceNormalizationLayer(this, GetParameters(), GetName());
+}
+
+} // namespace armnn
diff --git a/src/armnn/layers/InstanceNormalizationLayer.hpp b/src/armnn/layers/InstanceNormalizationLayer.hpp
new file mode 100644
index 0000000000..9ba56731c6
--- /dev/null
+++ b/src/armnn/layers/InstanceNormalizationLayer.hpp
@@ -0,0 +1,43 @@
+//
+// Copyright © 2019 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+#pragma once
+
+#include "LayerWithParameters.hpp"
+
+namespace armnn
+{
+
+/// This layer represents an instance normalization operation.
+class InstanceNormalizationLayer : public LayerWithParameters<InstanceNormalizationDescriptor>
+{
+public:
+    /// Makes a workload for the InstanceNormalization type.
+    /// @param [in] graph The graph where this layer can be found.
+    /// @param [in] factory The workload factory which will create the workload.
+    /// @return A pointer to the created workload, or nullptr if not created.
+    virtual std::unique_ptr<IWorkload> CreateWorkload(const Graph& graph,
+                                                      const IWorkloadFactory& factory) const override;
+
+    /// Creates a dynamically-allocated copy of this layer.
+    /// @param [in] graph The graph into which this layer is being cloned.
+    InstanceNormalizationLayer* Clone(Graph& graph) const override;
+
+    /// Check if the input tensor shape(s)
+    /// will lead to a valid configuration of @ref InstanceNormalizationLayer.
+    void ValidateTensorShapesFromInputs() override;
+
+    void Accept(ILayerVisitor& visitor) const override;
+
+protected:
+    /// Constructor to create a InstanceNormalizationLayer.
+    /// @param [in] param InstanceNormalizationDescriptor to configure the Instance normalization operation.
+    /// @param [in] name Optional name for the layer.
+    InstanceNormalizationLayer(const InstanceNormalizationDescriptor& param, const char* name);
+
+    /// Default destructor
+    ~InstanceNormalizationLayer() = default;
+};
+
+} // namespace