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//
// Copyright © 2020 Arm Ltd and Contributors. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include <string>
#include <map>
#include <vector>
#include <algorithm>
#include <cmath>
# pragma once
namespace asr
{
/**
* @brief Class used to Decode the output of the ASR inference
*
*/
class Decoder
{
public:
std::map<int, std::string> m_labels;
/**
* @brief Default constructor
* @param[in] labels - map of labels to be used for decoding to text.
*/
Decoder(std::map<int, std::string>& labels);
/**
* @brief Function to decode the output into a text string
* @param[in] output - the output vector to decode.
*/
template<typename T>
std::string DecodeOutput(std::vector<T>& contextToProcess)
{
int rowLength = 29;
std::vector<char> unfilteredText;
for(int row = 0; row < contextToProcess.size()/rowLength; ++row)
{
std::vector<int16_t> rowVector;
for(int j = 0; j < rowLength; ++j)
{
rowVector.emplace_back(static_cast<int16_t>(contextToProcess[row * rowLength + j]));
}
int maxIndex = std::distance(rowVector.begin(), std::max_element(rowVector.begin(), rowVector.end()));
unfilteredText.emplace_back(this->m_labels.at(maxIndex)[0]);
}
std::string filteredText = FilterCharacters(unfilteredText);
return filteredText;
}
/**
* @brief Function to filter out unwanted characters
* @param[in] unfiltered - the unfiltered output to be processed.
*/
std::string FilterCharacters(std::vector<char>& unfiltered);
};
} // namespace asr
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