MergeLayer.cpp

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//
// Copyright © 2019-2024 Arm Ltd and Contributors. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include "MergeLayer.hpp"
 
#include "LayerCloneBase.hpp"
 
#include <armnn/backends/WorkloadData.hpp>
#include <armnn/backends/WorkloadFactory.hpp>
 
namespace armnn
{
 
MergeLayer::MergeLayer(const char* name)
    : Layer(2, 1, LayerType::Merge, name)
{}
 
std::unique_ptr<IWorkload> MergeLayer::CreateWorkload(const IWorkloadFactory& factory) const
{
    IgnoreUnused(factory);
    return nullptr;
}
 
MergeLayer* MergeLayer::Clone(Graph& graph) const
{
    return CloneBase<MergeLayer>(graph, GetName());
}
 
void MergeLayer::ValidateTensorShapesFromInputs()
{
    VerifyLayerConnections(2, CHECK_LOCATION());
 
    const TensorShape& outputShape = GetOutputSlot(0).GetTensorInfo().GetShape();
 
    VerifyShapeInferenceType(outputShape, m_ShapeInferenceMethod);
 
    std::vector<TensorShape> inferredShapes = InferOutputShapes({
        GetInputSlot(0).GetTensorInfo().GetShape(),
        GetInputSlot(1).GetTensorInfo().GetShape(),
    });
 
    if (inferredShapes.size() != 1)
    {
        throw armnn::LayerValidationException("inferredShapes has "
                                              + std::to_string(inferredShapes.size()) +
                                              " elements - should only have 1.");
    }
 
    ValidateAndCopyShape(outputShape, inferredShapes[0], m_ShapeInferenceMethod, "MergeLayer");
}
 
std::vector<TensorShape> MergeLayer::InferOutputShapes(const std::vector<TensorShape>& inputShapes) const
{
    if (inputShapes.size() != 2)
    {
        throw armnn::Exception("inputShapes' size is \"" + std::to_string(inputShapes.size()) +
                               "\" - should be \"2\".");
    }
 
    ConditionalThrowIfNotEqual<LayerValidationException>(
        "MergeLayer: TensorShapes set on inputs do not match",
        inputShapes[0],
        inputShapes[1]
    );
 
    return {inputShapes[0]};
}
 
void MergeLayer::ExecuteStrategy(IStrategy& strategy) const
{
    strategy.ExecuteStrategy(this, GetParameters(), {}, GetName());
}
 
} // namespace armnn