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//
// Copyright © 2021 Arm Ltd and Contributors. All rights reserved.
// SPDX-License-Identifier: MIT
//
#ifndef KEYWORD_SPOTTING_EXAMPLE_DSCNNPREPROCESSOR_HPP
#define KEYWORD_SPOTTING_EXAMPLE_DSCNNPREPROCESSOR_HPP
#include <numeric>
#include "DsCnnMfcc.hpp"
namespace kws
{
class DsCNNPreprocessor
{
public:
DsCNNPreprocessor(uint32_t windowLen, uint32_t windowStride,
std::unique_ptr<DsCnnMFCC> mfccInst);
/**
* @brief Calculates the features required from audio data. This
* includes MFCC, first and second order deltas,
* normalisation and finally, quantisation. The tensor is
* populated with feature from a given window placed along
* in a single row.
* @param[in] audioData pointer to the first element of audio data
* @param[in] output output to be populated
* @return true if successful, false in case of error.
*/
std::vector<int8_t> Invoke(const float* audioData,
size_t dataSize,
int quantOffset,
float quantScale) ;
uint32_t m_windowLen; // Window length for MFCC
uint32_t m_windowStride; // Window stride len for MFCC
std::unique_ptr<MFCC> m_mfcc;
};
} // namespace kws
#endif //KEYWORD_SPOTTING_EXAMPLE_DSCNNPREPROCESSOR_HPP
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