2 files changed, 134 insertions, 0 deletions
diff --git a/src/armnn/layers/DepthToSpaceLayer.cpp b/src/armnn/layers/DepthToSpaceLayer.cpp
new file mode 100644
index 0000000000..e964c32865
--- /dev/null
+++ b/src/armnn/layers/DepthToSpaceLayer.cpp
@@ -0,0 +1,84 @@
+//
+// Copyright © 2019 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "DepthToSpaceLayer.hpp"
+
+#include "LayerCloneBase.hpp"
+
+#include <armnn/TypesUtils.hpp>
+
+#include <backendsCommon/WorkloadData.hpp>
+#include <backendsCommon/WorkloadFactory.hpp>
+
+#include <DataLayoutIndexed.hpp>
+
+#include <numeric>
+
+namespace armnn
+{
+
+DepthToSpaceLayer::DepthToSpaceLayer(const DepthToSpaceDescriptor& param, const char* name)
+    : LayerWithParameters(1, 1, LayerType::DepthToSpace, param, name)
+{}
+
+std::unique_ptr<IWorkload> DepthToSpaceLayer::CreateWorkload(const Graph& graph,
+                                                             const IWorkloadFactory& factory) const
+{
+    DepthToSpaceQueueDescriptor descriptor;
+    descriptor.m_Parameters.m_BlockSize  = m_Param.m_BlockSize;
+    descriptor.m_Parameters.m_DataLayout = m_Param.m_DataLayout;
+
+    return factory.CreateDepthToSpace(descriptor, PrepInfoAndDesc(descriptor, graph));
+}
+
+DepthToSpaceLayer* DepthToSpaceLayer::Clone(Graph& graph) const
+{
+    return CloneBase<DepthToSpaceLayer>(graph, m_Param, GetName());
+}
+
+std::vector<TensorShape> DepthToSpaceLayer::InferOutputShapes(const std::vector<TensorShape>& inputShapes) const
+{
+    throw UnimplementedException("DepthToSpaceLayer::InferOutputShapes is not implemented");
+
+    BOOST_ASSERT(inputShapes.size() == 1);
+
+    TensorShape inputShape = inputShapes[0];
+    TensorShape outputShape(inputShape);
+
+    armnnUtils::DataLayoutIndexed dimensionIndices(m_Param.m_DataLayout);
+
+    unsigned int hIndex = dimensionIndices.GetHeightIndex();
+    unsigned int wIndex = dimensionIndices.GetWidthIndex();
+    unsigned int cIndex = dimensionIndices.GetChannelsIndex();
+
+    outputShape[hIndex] = inputShape[hIndex] * m_Param.m_BlockSize;
+    outputShape[wIndex] = inputShape[wIndex] * m_Param.m_BlockSize;
+
+    outputShape[cIndex] = inputShape[cIndex] / (m_Param.m_BlockSize * m_Param.m_BlockSize);
+
+    return std::vector<TensorShape>({ outputShape });
+}
+
+void DepthToSpaceLayer::ValidateTensorShapesFromInputs()
+{
+    VerifyLayerConnections(1, CHECK_LOCATION());
+
+    std::vector<TensorShape> inferredShapes = InferOutputShapes({
+        GetInputSlot(0).GetConnection()->GetTensorInfo().GetShape() });
+
+    BOOST_ASSERT(inferredShapes.size() == 1);
+
+    ConditionalThrowIfNotEqual<LayerValidationException>(
+        "DepthToSpaceLayer: TensorShape set on OutputSlot[0] does not match the inferred shape.",
+        GetOutputSlot(0).GetTensorInfo().GetShape(),
+        inferredShapes[0]);
+}
+
+void DepthToSpaceLayer::Accept(ILayerVisitor& visitor) const
+{
+    visitor.VisitDepthToSpaceLayer(this, GetParameters(), GetName());
+}
+
+} // namespace armnn
diff --git a/src/armnn/layers/DepthToSpaceLayer.hpp b/src/armnn/layers/DepthToSpaceLayer.hpp
new file mode 100644
index 0000000000..cc5abe4cc9
--- /dev/null
+++ b/src/armnn/layers/DepthToSpaceLayer.hpp
@@ -0,0 +1,50 @@
+//
+// Copyright © 2019 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include "LayerWithParameters.hpp"
+
+namespace armnn
+{
+
+/// This layer represents a DepthToSpace operation.
+class DepthToSpaceLayer : public LayerWithParameters<DepthToSpaceDescriptor>
+{
+public:
+    /// Makes a workload for the DepthToSpace 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.
+    DepthToSpaceLayer* Clone(Graph& graph) const override;
+
+    /// By default returns inputShapes if the number of inputs are equal to number of outputs,
+    /// otherwise infers the output shapes from given input shapes and layer properties.
+    /// @param [in] inputShapes The input shapes layer has.
+    /// @return A vector to the inferred output shape.
+    std::vector<TensorShape> InferOutputShapes(const std::vector<TensorShape>& inputShapes) const override;
+
+    /// Check if the input tensor shape(s)
+    /// will lead to a valid configuration of @ref DepthToSpaceLayer.
+    void ValidateTensorShapesFromInputs() override;
+
+    void Accept(ILayerVisitor& visitor) const override;
+
+protected:
+    /// Constructor to create a DepthToSpaceLayer.
+    /// @param [in] param DepthToSpaceDescriptor to configure the DepthToSpaceLayer operation.
+    /// @param [in] name Optional name for the layer.
+    DepthToSpaceLayer(const DepthToSpaceDescriptor& param, const char* name);
+
+    /// Default destructor
+    ~DepthToSpaceLayer() = default;
+};
+
+} // namespace armnn