src/armnnUtils/TensorIOUtils.hpp

//
// Copyright © 2017 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//

#pragma once

#include <armnn/Tensor.hpp>
#include <vector>

#include <boost/format.hpp>
#include <boost/variant/apply_visitor.hpp>

namespace armnnUtils
{

template<typename TContainer>
inline armnn::InputTensors MakeInputTensors(
    const std::vector<armnn::BindingPointInfo>& inputBindings,
    const std::vector<TContainer>& inputDataContainers)
{
    armnn::InputTensors inputTensors;

    const size_t numInputs = inputBindings.size();
    if (numInputs != inputDataContainers.size())
    {
        throw armnn::Exception(boost::str(boost::format("Number of inputs does not match number of "
            "tensor data containers: %1% != %2%") % numInputs % inputDataContainers.size()));
    }

    for (size_t i = 0; i < numInputs; i++)
    {
        const armnn::BindingPointInfo& inputBinding = inputBindings[i];
        const TContainer& inputData = inputDataContainers[i];

        boost::apply_visitor([&](auto&& value)
                             {
                                 if (value.size() != inputBinding.second.GetNumElements())
                                 {
                                    std::ostringstream msg;
                                    msg << "Input tensor has incorrect size (expected "
                                        << inputBinding.second.GetNumElements() << " got "
                                        << value.size();
                                    throw armnn::Exception(msg.str());
                                 }

                                 armnn::ConstTensor inputTensor(inputBinding.second, value.data());
                                 inputTensors.push_back(std::make_pair(inputBinding.first, inputTensor));
                             },
                             inputData);
    }

    return inputTensors;
}

template<typename TContainer>
inline armnn::OutputTensors MakeOutputTensors(
    const std::vector<armnn::BindingPointInfo>& outputBindings,
    std::vector<TContainer>& outputDataContainers)
{
    armnn::OutputTensors outputTensors;

    const size_t numOutputs = outputBindings.size();
    if (numOutputs != outputDataContainers.size())
    {
        throw armnn::Exception(boost::str(boost::format("Number of outputs does not match number of "
            "tensor data containers: %1% != %2%") % numOutputs % outputDataContainers.size()));
    }

    for (size_t i = 0; i < numOutputs; i++)
    {
        const armnn::BindingPointInfo& outputBinding = outputBindings[i];
        TContainer& outputData = outputDataContainers[i];

        boost::apply_visitor([&](auto&& value)
                             {
                                 if (value.size() != outputBinding.second.GetNumElements())
                                 {
                                     throw armnn::Exception("Output tensor has incorrect size");
                                 }

                                 armnn::Tensor outputTensor(outputBinding.second, value.data());
                                 outputTensors.push_back(std::make_pair(outputBinding.first, outputTensor));
                             },
                             outputData);
    }

    return outputTensors;
}

} // namespace armnnUtils