diff options
Diffstat (limited to 'samples/SpeechRecognition/include/SlidingWindow.hpp')
| -rw-r--r-- | samples/SpeechRecognition/include/SlidingWindow.hpp | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/samples/SpeechRecognition/include/SlidingWindow.hpp b/samples/SpeechRecognition/include/SlidingWindow.hpp deleted file mode 100644 index 791a0b7fc0..0000000000 --- a/samples/SpeechRecognition/include/SlidingWindow.hpp +++ /dev/null @@ -1,161 +0,0 @@ -// -// Copyright © 2020 Arm Ltd and Contributors. All rights reserved. -// SPDX-License-Identifier: MIT -// - -#pragma once - -template<class T> -class SlidingWindow -{ -protected: - T* m_start = nullptr; - size_t m_dataSize = 0; - size_t m_size = 0; - size_t m_stride = 0; - size_t m_count = 0; -public: - - /** - * Creates the window slider through the given data. - * - * @param data pointer to the data to slide through. - * @param dataSize size in T type elements wise. - * @param windowSize sliding window size in T type wise elements. - * @param stride stride size in T type wise elements. - */ - SlidingWindow(T* data, size_t dataSize, - size_t windowSize, size_t stride) - { - m_start = data; - m_dataSize = dataSize; - m_size = windowSize; - m_stride = stride; - } - - SlidingWindow() = default; - - ~SlidingWindow() = default; - - /** - * Get the next data window. - * @return pointer to the next window, if next window is not available nullptr is returned. - */ - virtual T* Next() - { - if (HasNext()) - { - m_count++; - return m_start + Index() * m_stride; - } - else - { - return nullptr; - } - } - - /** - * Checks if the next data portion is available. - * @return true if next data portion is available - */ - bool HasNext() - { - return this->m_count < 1 + this->FractionalTotalStrides() && (this->NextWindowStartIndex() < this->m_dataSize); - } - - /** - * Resest the slider to the initial position. - */ - virtual void Reset() - { - m_count = 0; - } - - /** - * Resest the slider to the initial position. - */ - virtual size_t GetWindowSize() - { - return m_size; - } - - /** - * Resets the slider to the start of the new data. - * New data size MUST be the same as the old one. - * @param newStart pointer to the new data to slide through. - */ - virtual void Reset(T* newStart) - { - m_start = newStart; - Reset(); - } - - /** - * Gets current index of the sliding window. - * @return current position of the sliding window in number of strides - */ - size_t Index() - { - return m_count == 0? 0: m_count - 1; - } - - /** - * Gets the index from the start of the data where the next window will begin. - * While Index() returns the index of sliding window itself this function returns the index of the data - * element itself. - * @return Index from the start of the data where the next sliding window will begin. - */ - virtual size_t NextWindowStartIndex() - { - return m_count == 0? 0: ((m_count) * m_stride); - } - - /** - * Go to given sliding window index. - * @param index new position of the sliding window. if index is invalid (greater than possible range of strides) - * then next call to Next() will return nullptr. - */ - void FastForward(size_t index) - { - m_count = index; - } - - /** - * Calculates whole number of times the window can stride through the given data. - * @return maximum number of strides. - */ - size_t TotalStrides() - { - if (m_size > m_dataSize) - { - return 0; - } - return ((m_dataSize - m_size)/m_stride); - } - - /** - * Calculates number of times the window can stride through the given data. May not be a whole number. - * @return Number of strides to cover all data. - */ - float FractionalTotalStrides() - { - if(this->m_size > this->m_dataSize) - { - return this->m_dataSize / this->m_size; - } - else - { - return ((this->m_dataSize - this->m_size)/ static_cast<float>(this->m_stride)); - } - - } - - /** - * Calculates the remaining data left to be processed - * @return The remaining unprocessed data - */ - int RemainingData() - { - return this->m_dataSize - this->NextWindowStartIndex(); - } -};
\ No newline at end of file |