Compute Library
 21.02
StackLayerNode.cpp
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25 
27 #include "arm_compute/core/Utils.h"
31 
33 
34 namespace arm_compute
35 {
36 namespace graph
37 {
38 StackLayerNode::StackLayerNode(unsigned int total_nodes, int axis)
39  : _total_nodes(total_nodes), _axis(axis)
40 {
41  _input_edges.resize(_total_nodes, EmptyEdgeID);
42  _outputs.resize(1, NullTensorID);
43 }
44 
46 {
47  return _axis;
48 }
49 
50 TensorDescriptor StackLayerNode::compute_output_descriptor(const std::vector<TensorDescriptor> &input_descriptors,
51  int axis)
52 {
53  ARM_COMPUTE_ERROR_ON(input_descriptors.size() == 0);
54 
55  TensorDescriptor output_descriptor = input_descriptors[0];
56 
57  const TensorInfo input_info(input_descriptors[0].shape, 1, input_descriptors[0].data_type);
58  const unsigned int num_tensors = input_descriptors.size();
59 
60  output_descriptor.shape = arm_compute::misc::shape_calculator::compute_stack_shape(input_info, axis, num_tensors);
61 
62  return output_descriptor;
63 }
64 
66 {
67  if(_outputs[0] != NullTensorID)
68  {
69  Tensor *dst = output(0);
70  ARM_COMPUTE_ERROR_ON(dst == nullptr);
71  dst->desc() = configure_output(0);
72  return true;
73  }
74  return false;
75 }
76 
78 {
79  ARM_COMPUTE_UNUSED(idx);
80  ARM_COMPUTE_ERROR_ON(idx >= _outputs.size());
81 
82  // Check if all input tensors are set
83  bool are_all_inputs_set = std::all_of(std::begin(_input_edges), std::end(_input_edges), [](const EdgeID & eid)
84  {
85  return eid != EmptyEdgeID;
86  });
87 
89 
90  if(are_all_inputs_set)
91  {
92  std::vector<TensorDescriptor> inputs_descriptors;
93  for(unsigned int i = 0; i < _input_edges.size(); ++i)
94  {
95  const Tensor *t = _graph->tensor(input_id(i));
96  ARM_COMPUTE_ERROR_ON(t == nullptr);
97  inputs_descriptors.push_back(t->desc());
98  }
99  output_info = compute_output_descriptor(inputs_descriptors, _axis);
100  }
101 
102  return output_info;
103 }
104 
106 {
107  return NodeType::StackLayer;
108 }
109 
111 {
112  v.visit(*this);
113 }
114 } // namespace graph
115 } // namespace arm_compute
TensorShape compute_stack_shape(const ITensorInfo &a, unsigned int axis, unsigned int num_tensors)
Calculate the stack output shape of a tensor.
static TensorDescriptor compute_output_descriptor(const std::vector< TensorDescriptor > &input_descriptors, int axis)
Computes stack output descriptor.
#define ARM_COMPUTE_ERROR_ON(cond)
If the condition is true then an error message is printed and an exception thrown.
Definition: Error.h:466
NodeType type() const override
Returns node&#39;s type.
bool forward_descriptors() override
Forwards descriptor information to outputs if possible.
StackLayerNode(unsigned int total_nodes, int axis)
Constructor.
Copyright (c) 2017-2021 Arm Limited.
TensorDescriptor & desc()
TensorInfo metadata accessor.
Definition: Tensor.cpp:40
const DataType data_type
Definition: Im2Col.cpp:150
#define ARM_COMPUTE_UNUSED(...)
To avoid unused variables warnings.
Definition: Error.h:152
virtual void visit(INode &n)=0
Visit INode.
Tensor * output(size_t idx) const
Returns the tensor of a given output of the node.
Definition: INode.cpp:158
TensorID input_id(size_t idx) const
Returns the tensor ID of a given input of the node.
Definition: INode.cpp:137
NodeType
Supported nodes.
Definition: Types.h:142
void end(TokenStream &in, bool &valid)
Definition: MLGOParser.cpp:290
constexpr EdgeID EmptyEdgeID
Definition: Types.h:75
unsigned int EdgeID
Definition: Types.h:67
int axis() const
Stack axis parameter accessor.
TensorDescriptor configure_output(size_t idx) const override
Calculates output configuration.
Store the tensor&#39;s metadata.
Definition: TensorInfo.h:45
constexpr TensorID NullTensorID
Constant NodeID specifying an equivalent of null node.
Definition: Types.h:71
Node visitor interface.
Definition: INodeVisitor.h:34
void accept(INodeVisitor &v) override
Accepts a node visitor.
Tensor object.
Definition: Tensor.h:41