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//
// Copyright © 2017 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include "TransposeConvolution2dLayer.hpp"
#include "LayerCloneBase.hpp"
#include <armnn/TypesUtils.hpp>
#include <armnnUtils/DataLayoutIndexed.hpp>
#include <backendsCommon/CpuTensorHandle.hpp>
#include <backendsCommon/WorkloadFactory.hpp>
using namespace armnnUtils;
namespace armnn
{
TransposeConvolution2dLayer::TransposeConvolution2dLayer(const TransposeConvolution2dDescriptor& param,
const char* name)
: LayerWithParameters(1, 1, LayerType::TransposeConvolution2d, param, name)
{
}
std::unique_ptr<IWorkload> TransposeConvolution2dLayer::CreateWorkload(const IWorkloadFactory& factory) const
{
ARMNN_ASSERT_MSG(m_Weight != nullptr, "TransposeConvolution2dLayer: Weights data should not be null.");
TransposeConvolution2dQueueDescriptor descriptor;
descriptor.m_Weight = m_Weight.get();
if (m_Param.m_BiasEnabled)
{
ARMNN_ASSERT_MSG(m_Bias != nullptr, "TransposeConvolution2dLayer: Bias data should not be null.");
descriptor.m_Bias = m_Bias.get();
}
return factory.CreateTransposeConvolution2d(descriptor, PrepInfoAndDesc(descriptor));
}
TransposeConvolution2dLayer* TransposeConvolution2dLayer::Clone(Graph& graph) const
{
auto layer = CloneBase<TransposeConvolution2dLayer>(graph, m_Param, GetName());
layer->m_Weight = m_Weight ? std::make_unique<ScopedCpuTensorHandle>(*m_Weight) : nullptr;
if (layer->m_Param.m_BiasEnabled)
{
layer->m_Bias = m_Bias ? std::make_unique<ScopedCpuTensorHandle>(*m_Bias) : nullptr;
}
return std::move(layer);
}
std::vector<TensorShape> TransposeConvolution2dLayer::InferOutputShapes(
const std::vector<TensorShape>& inputShapes) const
{
ARMNN_ASSERT(inputShapes.size() == 2);
const TensorShape& inputShape = inputShapes[0];
const TensorShape& kernelShape = inputShapes[1];
ARMNN_ASSERT_MSG(inputShape.GetNumDimensions() == 4, "Transpose convolutions will always have 4D input");
DataLayoutIndexed dataLayoutIndex(m_Param.m_DataLayout);
const unsigned int batches = inputShape[0];
const unsigned int wInput = inputShape[dataLayoutIndex.GetWidthIndex()];
const unsigned int hInput = inputShape[dataLayoutIndex.GetHeightIndex()];
const unsigned int wKernel = kernelShape[dataLayoutIndex.GetWidthIndex()];
const unsigned int hKernel = kernelShape[dataLayoutIndex.GetHeightIndex()];
unsigned int wPadding = m_Param.m_PadLeft + m_Param.m_PadRight;
unsigned int hPadding = m_Param.m_PadTop + m_Param.m_PadBottom;
unsigned int wOutput = (wInput - 1) * m_Param.m_StrideX + wKernel - wPadding;
unsigned int hOutput = (hInput - 1) * m_Param.m_StrideY + hKernel - hPadding;
unsigned int kernelElements = kernelShape[0] * kernelShape[dataLayoutIndex.GetChannelsIndex()];
unsigned int inputElements = batches * inputShape[dataLayoutIndex.GetChannelsIndex()];
ARMNN_ASSERT_MSG(inputElements != 0, "Invalid number of input elements");
unsigned int channels;
if (kernelElements >= inputElements)
{
ARMNN_ASSERT_MSG(kernelElements % inputElements == 0 , "Invalid number of elements");
channels = kernelElements / inputElements;
}
else
{
ARMNN_ASSERT_MSG(inputElements % kernelElements == 0 , "Invalid number of elements");
channels = kernelShape[0];
}
TensorShape tensorShape = m_Param.m_DataLayout == armnn::DataLayout::NHWC ?
TensorShape( { batches, hOutput, wOutput, channels } ) :
TensorShape( { batches, channels, hOutput, wOutput });
return std::vector<TensorShape>({ tensorShape });
}
void TransposeConvolution2dLayer::ValidateTensorShapesFromInputs(ShapeInferenceMethod shapeInferenceMethod)
{
IgnoreUnused(shapeInferenceMethod);
VerifyLayerConnections(1, CHECK_LOCATION());
ARMNN_ASSERT_MSG(m_Weight != nullptr, "TransposeConvolution2dLayer: Weight data cannot be null.");
auto inferredShapes = InferOutputShapes({
GetInputSlot(0).GetConnection()->GetTensorInfo().GetShape(),
m_Weight->GetTensorInfo().GetShape() });
ARMNN_ASSERT(inferredShapes.size() == 1);
ConditionalThrowIfNotEqual<LayerValidationException>(
"TransposeConvolution2dLayer: TensorShape set on OutputSlot[0] does not match the inferred shape.",
GetOutputSlot(0).GetTensorInfo().GetShape(),
inferredShapes[0]);
}
Layer::ConstantTensors TransposeConvolution2dLayer::GetConstantTensorsByRef()
{
return {m_Weight, m_Bias};
}
void TransposeConvolution2dLayer::Accept(ILayerVisitor& visitor) const
{
ConstTensor weightsTensor(m_Weight->GetTensorInfo(), m_Weight->Map(true)) ;
Optional<ConstTensor> optionalBiasTensor = EmptyOptional();
if (GetParameters().m_BiasEnabled)
{
ConstTensor biasTensor(m_Bias->GetTensorInfo(), m_Bias->Map(true));
optionalBiasTensor = Optional<ConstTensor>(biasTensor);
}
visitor.VisitTransposeConvolution2dLayer(this, GetParameters(), weightsTensor, optionalBiasTensor, GetName());
}
} // namespace armnn
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