COMPMID-1595 Add UpsampleLayer to graph API

Change-Id: I7427b0fbb222ff9760d47b01a59aee654f2f860f
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/149587
Tested-by: bsgcomp <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>

9 files changed, 180 insertions, 0 deletions

diff --git a/arm_compute/graph/GraphBuilder.h b/arm_compute/graph/GraphBuilder.h
index 3821eb3968..1302d2a2b3 100644
--- a/arm_compute/graph/GraphBuilder.h
+++ b/arm_compute/graph/GraphBuilder.h
@@ -351,6 +351,17 @@ public:
      * @return Node ID of the created node, EmptyNodeID in case of error
      */
     static NodeID add_split_node(Graph &g, NodeParams params, NodeIdxPair input, unsigned int num_splits, unsigned int axis = 0);
+    /** Adds an upsample layer to the graph
+     *
+     * @param[in] g                 Graph to add the node to
+     * @param[in] params            Common node parameters
+     * @param[in] input             Input to the yolo layer node as a NodeID-Index pair
+     * @param[in] info              Upsample layer stride info
+     * @param[in] upsampling_policy Upsampling policy used
+     *
+     * @return Node ID of the created node, EmptyNodeID in case of error
+     */
+    static NodeID add_upsample_node(Graph &g, NodeParams params, NodeIdxPair input, Size2D info, InterpolationPolicy upsampling_policy);
     /** Adds a yolo layer to the graph
      *
      * @param[in] g           Graph to add the node to
diff --git a/arm_compute/graph/TypePrinter.h b/arm_compute/graph/TypePrinter.h
index 983400ffe3..b0d0fb0242 100644
--- a/arm_compute/graph/TypePrinter.h
+++ b/arm_compute/graph/TypePrinter.h
@@ -122,6 +122,9 @@ inline ::std::ostream &operator<<(::std::ostream &os, const NodeType &node_type)
         case NodeType::SplitLayer:
             os << "SplitLayer";
             break;
+        case NodeType::UpsampleLayer:
+            os << "UpsampleLayer";
+            break;
         case NodeType::YOLOLayer:
             os << "YOLOLayer";
             break;
diff --git a/arm_compute/graph/Types.h b/arm_compute/graph/Types.h
index 1e613f7e29..1f252097af 100644
--- a/arm_compute/graph/Types.h
+++ b/arm_compute/graph/Types.h
@@ -150,6 +150,7 @@ enum class NodeType
     SoftmaxLayer,
     SliceLayer,
     SplitLayer,
+    UpsampleLayer,
     YOLOLayer,
 
     Input,
diff --git a/arm_compute/graph/backends/FunctionHelpers.h b/arm_compute/graph/backends/FunctionHelpers.h
index 7f5093aa24..32ef0aaf13 100644
--- a/arm_compute/graph/backends/FunctionHelpers.h
+++ b/arm_compute/graph/backends/FunctionHelpers.h
@@ -911,6 +911,47 @@ std::unique_ptr<IFunction> create_softmax_layer(SoftmaxLayerNode &node, GraphCon
 
     return std::move(func);
 }
+/** Create a backend Upsample layer function
+ *
+ * @tparam UpsampleLayerFunction Backend Upsample function
+ * @tparam TargetInfo            Target-specific information
+ *
+ * @param[in] node Node to create the backend function for
+ * @param[in] ctx  Graph context
+ *
+ * @return Backend Upsample layer function
+ */
+template <typename UpsampleLayerFunction, typename TargetInfo>
+std::unique_ptr<IFunction> create_upsample_layer(UpsampleLayerNode &node, GraphContext &ctx)
+{
+    validate_node<TargetInfo>(node, 1 /* expected inputs */, 1 /* expected outputs */);
+
+    // Extract IO and info
+    typename TargetInfo::TensorType *input             = get_backing_tensor<TargetInfo>(node.input(0));
+    typename TargetInfo::TensorType *output            = get_backing_tensor<TargetInfo>(node.output(0));
+    const Size2D                     info              = node.info();
+    const InterpolationPolicy        upsampling_policy = node.upsampling_policy();
+    ARM_COMPUTE_ERROR_ON(upsampling_policy != InterpolationPolicy::NEAREST_NEIGHBOR);
+    ARM_COMPUTE_ERROR_ON(info.x() != 2 || info.y() != 2);
+    ARM_COMPUTE_ERROR_ON(input == nullptr);
+    ARM_COMPUTE_ERROR_ON(output == nullptr);
+
+    // Create and configure function
+    auto func = support::cpp14::make_unique<UpsampleLayerFunction>();
+    func->configure(input, output, info, upsampling_policy);
+
+    // Log info
+    ARM_COMPUTE_LOG_GRAPH_INFO("Instantiated " << node.type()
+                               << " Target " << TargetInfo::TargetType
+                               << " Data Type: " << input->info()->data_type()
+                               << " Input shape: " << input->info()->tensor_shape()
+                               << " Output shape: " << output->info()->tensor_shape()
+                               << " Strides: " << info
+                               << " Upsampling policy: " << upsampling_policy
+                               << std::endl);
+
+    return std::move(func);
+}
 /** Create a backend YOLO layer function
  *
  * @tparam YoloLayerFunction Backend YOLO function
diff --git a/arm_compute/graph/backends/ValidateHelpers.h b/arm_compute/graph/backends/ValidateHelpers.h
index 2dc349174d..ff644c4946 100644
--- a/arm_compute/graph/backends/ValidateHelpers.h
+++ b/arm_compute/graph/backends/ValidateHelpers.h
@@ -273,6 +273,28 @@ Status validate_slice_layer(SliceLayerNode &node)
     return SliceLayer::validate(input, output, starts, ends);
 }
 
+/** Validates a Upsample layer node
+ *
+ * @tparam UpsampleLayer Upsample layer type
+ *
+ * @param[in] node Node to validate
+ *
+ * @return Status
+ */
+template <typename UpsampleLayer>
+Status validate_upsample_layer(UpsampleLayerNode &node)
+{
+    ARM_COMPUTE_LOG_GRAPH_VERBOSE("Validating UpsampleLayer node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
+    ARM_COMPUTE_RETURN_ERROR_ON(node.num_inputs() != 1);
+    ARM_COMPUTE_RETURN_ERROR_ON(node.num_outputs() != 1);
+
+    // Extract input and output
+    arm_compute::ITensorInfo *input  = detail::get_backing_tensor_info(node.input(0));
+    arm_compute::ITensorInfo *output = get_backing_tensor_info(node.output(0));
+
+    // Validate function
+    return UpsampleLayer::validate(input, output, node.info(), node.upsampling_policy());
+}
 /** Validates a YOLO layer node
  *
  * @tparam YOLOLayer YOLO layer type
diff --git a/arm_compute/graph/frontend/Layers.h b/arm_compute/graph/frontend/Layers.h
index 3a45115d7c..9c1ef1e140 100644
--- a/arm_compute/graph/frontend/Layers.h
+++ b/arm_compute/graph/frontend/Layers.h
@@ -768,6 +768,32 @@ private:
     float _beta;
 };
 
+/** Upsample Layer */
+class UpsampleLayer final : public ILayer
+{
+public:
+    /** Construct a Upsample layer.
+     *
+     * @param[in] info              Stride info
+     * @param[in] upsampling_policy Upsampling policy
+     */
+    UpsampleLayer(Size2D info, InterpolationPolicy upsampling_policy)
+        : _info(info), _upsampling_policy(upsampling_policy)
+    {
+    }
+
+    NodeID create_layer(IStream &s) override
+    {
+        NodeParams  common_params = { name(), s.hints().target_hint };
+        NodeIdxPair input         = { s.tail_node(), 0 };
+        return GraphBuilder::add_upsample_node(s.graph(), common_params, input, _info, _upsampling_policy);
+    }
+
+private:
+    Size2D              _info;
+    InterpolationPolicy _upsampling_policy;
+};
+
 /** YOLO Layer */
 class YOLOLayer final : public ILayer
 {
diff --git a/arm_compute/graph/nodes/Nodes.h b/arm_compute/graph/nodes/Nodes.h
index f1b899f784..2bda7e01ba 100644
--- a/arm_compute/graph/nodes/Nodes.h
+++ b/arm_compute/graph/nodes/Nodes.h
@@ -48,6 +48,7 @@
 #include "arm_compute/graph/nodes/SliceLayerNode.h"
 #include "arm_compute/graph/nodes/SoftmaxLayerNode.h"
 #include "arm_compute/graph/nodes/SplitLayerNode.h"
+#include "arm_compute/graph/nodes/UpsampleLayerNode.h"
 #include "arm_compute/graph/nodes/YOLOLayerNode.h"
 
 #endif /* __ARM_COMPUTE_GRAPH_NODES_H__ */
diff --git a/arm_compute/graph/nodes/NodesFwd.h b/arm_compute/graph/nodes/NodesFwd.h
index 18a8e2efa2..ae5ed7c405 100644
--- a/arm_compute/graph/nodes/NodesFwd.h
+++ b/arm_compute/graph/nodes/NodesFwd.h
@@ -54,6 +54,7 @@ class ResizeLayerNode;
 class SoftmaxLayerNode;
 class SliceLayerNode;
 class SplitLayerNode;
+class UpsampleLayerNode;
 class YOLOLayerNode;
 } // namespace graph
 } // namespace arm_compute
diff --git a/arm_compute/graph/nodes/UpsampleLayerNode.h b/arm_compute/graph/nodes/UpsampleLayerNode.h
new file mode 100644
index 0000000000..38afabe068
--- /dev/null
+++ b/arm_compute/graph/nodes/UpsampleLayerNode.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef __ARM_COMPUTE_GRAPH_UPSAMPLE_LAYER_NODE_H__
+#define __ARM_COMPUTE_GRAPH_UPSAMPLE_LAYER_NODE_H__
+
+#include "arm_compute/graph/INode.h"
+
+namespace arm_compute
+{
+namespace graph
+{
+/** Upsample Layer node */
+class UpsampleLayerNode final : public INode
+{
+public:
+    /** Constructor
+     *
+     * @param[in] info              Stride info
+     * @param[in] upsampling_policy Upsampling policy
+     */
+    UpsampleLayerNode(Size2D info, InterpolationPolicy upsampling_policy);
+    /** Stride info metadata accessor
+     *
+     * @return The stride info of the layer
+     */
+    Size2D info() const;
+    /** Upsampling policy metadata accessor
+     *
+     * @return The upsampling policy of the layer
+     */
+    InterpolationPolicy upsampling_policy() const;
+    /** Computes upsample output descriptor
+     *
+     * @param[in] input_descriptor Input descriptor
+     * @param[in] info             Stride information
+     *
+     * @return Output descriptor
+     */
+    static TensorDescriptor compute_output_descriptor(const TensorDescriptor &input_descriptor, Size2D info);
+
+    // Inherited overridden methods:
+    NodeType         type() const override;
+    bool             forward_descriptors() override;
+    TensorDescriptor configure_output(size_t idx) const override;
+    void accept(INodeVisitor &v) override;
+
+private:
+    Size2D              _info;
+    InterpolationPolicy _upsampling_policy;
+};
+} // namespace graph
+} // namespace arm_compute
+#endif /* __ARM_COMPUTE_GRAPH_UPSAMPLE_LAYER_NODE_H__ */