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//
// Copyright © 2017 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include "Serializer.hpp"
#include <armnn/ArmNN.hpp>
#include <iostream>
#include <Schema_generated.h>
#include <flatbuffers/util.h>
using namespace armnn;
namespace fb = flatbuffers;
namespace serializer = armnn::armnnSerializer;
namespace armnnSerializer
{
serializer::DataType GetFlatBufferDataType(DataType dataType)
{
switch (dataType)
{
case DataType::Float32:
return serializer::DataType::DataType_Float32;
case DataType::Float16:
return serializer::DataType::DataType_Float16;
case DataType::Signed32:
return serializer::DataType::DataType_Signed32;
case DataType::QuantisedAsymm8:
return serializer::DataType::DataType_QuantisedAsymm8;
case DataType::Boolean:
return serializer::DataType::DataType_Boolean;
default:
return serializer::DataType::DataType_Float16;
}
}
// Build FlatBuffer for Input Layer
void SerializerVisitor::VisitInputLayer(const IConnectableLayer* layer, LayerBindingId id, const char* name)
{
// Create FlatBuffer BaseLayer
auto flatBufferInputBaseLayer = CreateLayerBase(layer, serializer::LayerType::LayerType_Input);
// Create FlatBuffer BindableBaseLayer
auto flatBufferInputBindableBaseLayer = serializer::CreateBindableLayerBase(m_flatBufferBuilder,
flatBufferInputBaseLayer,
id);
// Push layer Guid to outputIds.
m_inputIds.push_back(layer->GetGuid());
// Create the FlatBuffer InputLayer
auto flatBufferInputLayer = serializer::CreateInputLayer(m_flatBufferBuilder, flatBufferInputBindableBaseLayer);
// Add the AnyLayer to the FlatBufferLayers
CreateAnyLayer(flatBufferInputLayer.o, serializer::Layer::Layer_InputLayer);
}
// Build FlatBuffer for Output Layer
void SerializerVisitor::VisitOutputLayer(const IConnectableLayer* layer, LayerBindingId id, const char* name)
{
// Create FlatBuffer BaseLayer
auto flatBufferOutputBaseLayer = CreateLayerBase(layer, serializer::LayerType::LayerType_Output);
// Create FlatBuffer BindableBaseLayer
auto flatBufferOutputBindableBaseLayer = serializer::CreateBindableLayerBase(m_flatBufferBuilder,
flatBufferOutputBaseLayer,
id);
// Push layer Guid to outputIds.
m_outputIds.push_back(layer->GetGuid());
// Create the FlatBuffer OutputLayer
auto flatBufferOutputLayer = serializer::CreateOutputLayer(m_flatBufferBuilder, flatBufferOutputBindableBaseLayer);
// Add the AnyLayer to the FlatBufferLayers
CreateAnyLayer(flatBufferOutputLayer.o, serializer::Layer::Layer_OutputLayer);
}
// Build FlatBuffer for Addition Layer
void SerializerVisitor::VisitAdditionLayer(const IConnectableLayer* layer, const char* name)
{
// Create FlatBuffer BaseLayer
auto flatBufferAdditionBaseLayer = CreateLayerBase(layer, serializer::LayerType::LayerType_Addition);
// Create the FlatBuffer AdditionLayer
auto flatBufferAdditionLayer = serializer::CreateAdditionLayer(m_flatBufferBuilder, flatBufferAdditionBaseLayer);
// Add the AnyLayer to the FlatBufferLayers
CreateAnyLayer(flatBufferAdditionLayer.o, serializer::Layer::Layer_AdditionLayer);
}
// Build FlatBuffer for Multiplication Layer
void SerializerVisitor::VisitMultiplicationLayer(const IConnectableLayer* layer, const char* name)
{
// Create FlatBuffer BaseLayer
auto flatBufferMultiplicationBaseLayer = CreateLayerBase(layer, serializer::LayerType::LayerType_Multiplication);
// Create the FlatBuffer MultiplicationLayer
auto flatBufferMultiplicationLayer =
serializer::CreateMultiplicationLayer(m_flatBufferBuilder, flatBufferMultiplicationBaseLayer);
// Add the AnyLayer to the FlatBufferLayers
CreateAnyLayer(flatBufferMultiplicationLayer.o, serializer::Layer::Layer_MultiplicationLayer);
}
fb::Offset<serializer::LayerBase> SerializerVisitor::CreateLayerBase(const IConnectableLayer* layer,
const serializer::LayerType layerType)
{
std::vector<fb::Offset<serializer::InputSlot>> inputSlots = CreateInputSlots(layer);
std::vector<fb::Offset<serializer::OutputSlot>> outputSlots = CreateOutputSlots(layer);
return serializer::CreateLayerBase(m_flatBufferBuilder,
layer->GetGuid(),
m_flatBufferBuilder.CreateString(layer->GetName()),
layerType,
m_flatBufferBuilder.CreateVector(inputSlots),
m_flatBufferBuilder.CreateVector(outputSlots));
}
void SerializerVisitor::CreateAnyLayer(const flatbuffers::Offset<void>& layer, const serializer::Layer serializerLayer)
{
auto anyLayer = armnn::armnnSerializer::CreateAnyLayer(m_flatBufferBuilder,
serializerLayer,
layer);
m_serializedLayers.push_back(anyLayer);
}
std::vector<fb::Offset<serializer::InputSlot>> SerializerVisitor::CreateInputSlots(const IConnectableLayer* layer)
{
std::vector<fb::Offset <serializer::InputSlot>> inputSlots;
// Get the InputSlots
for (unsigned int slotIndex = 0; slotIndex<layer->GetNumInputSlots(); ++slotIndex)
{
const IInputSlot& inputSlot = layer->GetInputSlot(slotIndex);
// Get the Connection for the InputSlot
const IOutputSlot* connection = inputSlot.GetConnection();
// Create FlatBuffer Connection
serializer::Connection conn(connection->GetOwningLayerGuid(), connection->CalculateIndexOnOwner());
// Create FlatBuffer InputSlot
inputSlots.push_back(serializer::CreateInputSlot(m_flatBufferBuilder, slotIndex, &conn));
}
return inputSlots;
}
std::vector<fb::Offset<serializer::OutputSlot>> SerializerVisitor::CreateOutputSlots(const IConnectableLayer* layer)
{
std::vector<fb::Offset<serializer::OutputSlot>> outputSlots;
// Get the OutputSlots
for (unsigned int slotIndex = 0; slotIndex < layer->GetNumOutputSlots(); ++slotIndex)
{
const IOutputSlot& outputSlot = layer->GetOutputSlot(slotIndex);
const TensorInfo& tensorInfo = outputSlot.GetTensorInfo();
// Get the dimensions
std::vector<unsigned int> shape;
for(unsigned int dim = 0; dim < tensorInfo.GetShape().GetNumDimensions(); ++dim)
{
shape.push_back(tensorInfo.GetShape()[dim]);
}
// Create FlatBuffer TensorInfo
auto flatBufferTensorInfo = serializer::CreateTensorInfo(m_flatBufferBuilder,
m_flatBufferBuilder.CreateVector(shape),
GetFlatBufferDataType(tensorInfo.GetDataType()),
tensorInfo.GetQuantizationScale(),
tensorInfo.GetQuantizationOffset());
// Create FlatBuffer Outputslot
outputSlots.push_back(serializer::CreateOutputSlot(m_flatBufferBuilder,
slotIndex,
flatBufferTensorInfo));
}
return outputSlots;
}
ISerializer* ISerializer::CreateRaw()
{
return new Serializer();
}
ISerializerPtr ISerializer::Create()
{
return ISerializerPtr(CreateRaw(), &ISerializer::Destroy);
}
void ISerializer::Destroy(ISerializer* serializer)
{
delete serializer;
}
void Serializer::Serialize(const INetwork& inNetwork)
{
// Iterate through to network
inNetwork.Accept(m_SerializerVisitor);
flatbuffers::FlatBufferBuilder& fbBuilder = m_SerializerVisitor.GetFlatBufferBuilder();
// Create FlatBuffer SerializedGraph
auto serializedGraph = serializer::CreateSerializedGraph(
fbBuilder,
fbBuilder.CreateVector(m_SerializerVisitor.GetSerializedLayers()),
fbBuilder.CreateVector(m_SerializerVisitor.GetInputIds()),
fbBuilder.CreateVector(m_SerializerVisitor.GetOutputIds()));
// Serialize the graph
fbBuilder.Finish(serializedGraph);
}
bool Serializer::SaveSerializedToStream(std::ostream& stream)
{
flatbuffers::FlatBufferBuilder& fbBuilder = m_SerializerVisitor.GetFlatBufferBuilder();
auto bytesToWrite = boost::numeric_cast<std::streamsize>(fbBuilder.GetSize());
stream.write(reinterpret_cast<const char*>(fbBuilder.GetBufferPointer()), bytesToWrite);
return !stream.bad();
}
} //nameespace armnnSerializer
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