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/*
* Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "circle_loader.h"
#include "base_loader.h"
#include "circle_schema_generated.h"
namespace onert
{
namespace circle_loader
{
namespace
{
ir::Layout convertDataFormat(circle::DataFormat data_format)
{
switch (data_format)
{
case circle::DataFormat::DataFormat_CHANNELS_FIRST:
return ir::Layout::NCHW;
case circle::DataFormat::DataFormat_CHANNELS_LAST:
return ir::Layout::NHWC;
default:
throw std::runtime_error("Unsupported DataFormat");
}
}
struct LoaderDomain
{
using Verifier = flatbuffers::Verifier;
using ActivationFunctionType = circle::ActivationFunctionType;
using Buffer = circle::Buffer;
using BuiltinOperator = circle::BuiltinOperator;
using CustomOptionsFormat = circle::CustomOptionsFormat;
using Model = circle::Model;
using Operator = circle::Operator;
using Padding = circle::Padding;
using Pool2DOptions = circle::Pool2DOptions;
using Tensor = circle::Tensor;
using TensorType = circle::TensorType;
using SubGraph = circle::SubGraph;
static const char *EnumNameBuiltinOperator(BuiltinOperator e)
{
return circle::EnumNameBuiltinOperator(e);
}
static const char *EnumNameActivationFunctionType(ActivationFunctionType e)
{
return circle::EnumNameActivationFunctionType(e);
}
static const char *EnumNameTensorType(TensorType e) { return circle::EnumNameTensorType(e); }
static const Model *GetModel(const void *buf) { return circle::GetModel(buf); }
static bool VerifyModelBuffer(Verifier &verifier) { return circle::VerifyModelBuffer(verifier); }
};
class CircleLoader final : public base_loader::BaseLoader<LoaderDomain, CircleLoader>
{
public:
using BaseLoader::BaseLoader;
std::unique_ptr<ir::Graph> loadSubgraph(const circle::SubGraph *circle_subg)
{
auto subg = std::make_unique<ir::Graph>();
// Load tensors
_tensor_to_operand.resize(circle_subg->tensors()->size());
for (flatbuffers::uoffset_t i = 0; i < circle_subg->tensors()->size(); ++i)
{
_tensor_to_operand[i] = loadOperand(circle_subg->tensors()->Get(i), *subg);
}
// Set inputs
for (const std::int32_t input_ind : *circle_subg->inputs())
{
subg->addInput(_tensor_to_operand[input_ind]);
}
// Set outputs
for (const std::int32_t output_ind : *circle_subg->outputs())
{
subg->addOutput(_tensor_to_operand[output_ind]);
}
// Create operations
for (const auto *op : *circle_subg->operators())
{
CircleLoader::loadOperation(op, *subg);
}
subg->setLayout(convertDataFormat(circle_subg->data_format()));
subg->finishBuilding();
return subg;
}
void loadOperation(const circle::Operator *op, ir::Graph &subg)
{
const auto builtin_op = _model->operator_codes()->Get(op->opcode_index())->builtin_code();
switch (builtin_op)
{
case circle::BuiltinOperator::BuiltinOperator_INSTANCE_NORM:
loadInstanceNorm(op, subg);
return;
default:
BaseLoader::loadOperation(op, subg);
return;
}
}
};
} // namespace
std::unique_ptr<ir::Graph> loadModel(const char *filename)
{
auto primary_subgraph = std::make_unique<ir::Graph>();
CircleLoader loader(primary_subgraph);
loader.loadFromFile(filename);
return primary_subgraph;
}
} // namespace circle_loader
} // namespace onert
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