1 //
2 // Copyright © 2017 Arm Ltd and Contributors. All rights reserved.
3 // SPDX-License-Identifier: MIT
4 //
5 #include "ConstantLayer.hpp"
6 #include "LayerCloneBase.hpp"
7
8 #include <armnn/TypesUtils.hpp>
9 #include <backendsCommon/CpuTensorHandle.hpp>
10 #include <backendsCommon/WorkloadData.hpp>
11 #include <backendsCommon/WorkloadFactory.hpp>
12
13 namespace armnn
14 {
15
ConstantLayer(const char * name)16 ConstantLayer::ConstantLayer(const char* name)
17 : Layer(0, 1, LayerType::Constant, name)
18 {
19 }
20
CreateWorkload(const IWorkloadFactory & factory) const21 std::unique_ptr<IWorkload> ConstantLayer::CreateWorkload(const IWorkloadFactory& factory) const
22 {
23 ConstantQueueDescriptor descriptor;
24 descriptor.m_LayerOutput = m_LayerOutput.get();
25 SetAdditionalInfo(descriptor);
26
27 return factory.CreateConstant(descriptor, PrepInfoAndDesc(descriptor));
28 }
29
Clone(Graph & graph) const30 ConstantLayer* ConstantLayer::Clone(Graph& graph) const
31 {
32 // Cloned layers share the same layer output object.
33 auto layer = CloneBase<ConstantLayer>(graph, GetName());
34
35 layer->m_LayerOutput = m_LayerOutput ? std::make_unique<ScopedCpuTensorHandle>(*m_LayerOutput) : nullptr;
36
37 return std::move(layer);
38 }
39
InferOutputShapes(const std::vector<TensorShape> & inputShapes) const40 std::vector<TensorShape> ConstantLayer::InferOutputShapes(const std::vector<TensorShape>& inputShapes) const
41 {
42 return std::vector<TensorShape>({ inputShapes[0] });
43 }
44
ValidateTensorShapesFromInputs()45 void ConstantLayer::ValidateTensorShapesFromInputs()
46 {
47
48 // Get the output shape from the value of the constant layer.
49 TensorShape const& outShape = m_LayerOutput->GetTensorInfo().GetShape();
50
51 ConditionalThrow<LayerValidationException>(
52 outShape.GetDimensionality() != Dimensionality::NotSpecified,
53 "Constant layer m_LayerOutput output shape can not be Dimensionality::NotSpecified");
54
55 ConditionalThrow<LayerValidationException>(
56 outShape.AreAllDimensionsSpecified(),
57 "Constant layer m_LayerOutput output shape can not have an unspecified dimension");
58
59 ConditionalThrowIfNotEqual<LayerValidationException>(
60 "ConstantLayer: TensorShape set on OutputSlot[0] does not match the inferred shape.",
61 GetOutputSlot(0).GetTensorInfo().GetShape(),
62 outShape);
63 }
64
Accept(ILayerVisitor & visitor) const65 void ConstantLayer::Accept(ILayerVisitor& visitor) const
66 {
67 ConstTensor layerOutputTensor(m_LayerOutput->GetTensorInfo(), m_LayerOutput->Map(true)) ;
68 visitor.VisitConstantLayer(this, layerOutputTensor, GetName());
69 }
70
71 } // namespace armnn
72