Éanna Ó Catháin | c6ab02a | 2021-04-07 14:35:25 +0100 | [diff] [blame] | 1 | // |
| 2 | // Copyright © 2020 Arm Ltd and Contributors. All rights reserved. |
| 3 | // SPDX-License-Identifier: MIT |
| 4 | // |
| 5 | |
| 6 | #include <string> |
| 7 | #include <map> |
| 8 | #include <vector> |
| 9 | #include <algorithm> |
| 10 | #include <cmath> |
| 11 | |
| 12 | # pragma once |
| 13 | |
| 14 | namespace asr |
| 15 | { |
| 16 | /** |
| 17 | * @brief Class used to Decode the output of the ASR inference |
| 18 | * |
| 19 | */ |
| 20 | class Decoder |
| 21 | { |
| 22 | public: |
| 23 | std::map<int, std::string> m_labels; |
| 24 | /** |
| 25 | * @brief Default constructor |
| 26 | * @param[in] labels - map of labels to be used for decoding to text. |
| 27 | */ |
| 28 | Decoder(std::map<int, std::string>& labels); |
| 29 | |
| 30 | /** |
| 31 | * @brief Function to decode the output into a text string |
| 32 | * @param[in] output - the output vector to decode. |
| 33 | */ |
| 34 | template<typename T> |
| 35 | std::string DecodeOutput(std::vector<T>& contextToProcess) |
| 36 | { |
| 37 | int rowLength = 29; |
| 38 | |
| 39 | std::vector<char> unfilteredText; |
| 40 | |
| 41 | for(int row = 0; row < contextToProcess.size()/rowLength; ++row) |
| 42 | { |
| 43 | std::vector<int16_t> rowVector; |
| 44 | for(int j = 0; j < rowLength; ++j) |
| 45 | { |
| 46 | rowVector.emplace_back(static_cast<int16_t>(contextToProcess[row * rowLength + j])); |
| 47 | } |
| 48 | |
George Gekov | 23c2627 | 2021-08-16 11:32:10 +0100 | [diff] [blame] | 49 | int maxIndex = std::distance(rowVector.begin(), std::max_element(rowVector.begin(), rowVector.end())); |
| 50 | unfilteredText.emplace_back(this->m_labels.at(maxIndex)[0]); |
Éanna Ó Catháin | c6ab02a | 2021-04-07 14:35:25 +0100 | [diff] [blame] | 51 | } |
| 52 | |
| 53 | std::string filteredText = FilterCharacters(unfilteredText); |
| 54 | return filteredText; |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * @brief Function to filter out unwanted characters |
| 59 | * @param[in] unfiltered - the unfiltered output to be processed. |
| 60 | */ |
| 61 | std::string FilterCharacters(std::vector<char>& unfiltered); |
| 62 | }; |
| 63 | } // namespace asr |