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Diffstat (limited to 'source/application/main/include/AudioUtils.hpp')
| -rw-r--r-- | source/application/main/include/AudioUtils.hpp | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/source/application/main/include/AudioUtils.hpp b/source/application/main/include/AudioUtils.hpp deleted file mode 100644 index cbf7bb7..0000000 --- a/source/application/main/include/AudioUtils.hpp +++ /dev/null @@ -1,172 +0,0 @@ -/* - * Copyright (c) 2021 Arm Limited. All rights reserved. - * SPDX-License-Identifier: Apache-2.0 - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#ifndef AUDIO_UTILS_HPP -#define AUDIO_UTILS_HPP - -#include <cstddef> -#include <cstdint> - -namespace arm { -namespace app { -namespace audio { - - template<class T> - class SlidingWindow { - public: - - /** - * @brief Creates the window slider through the given data. - * - * @param[in] data Pointer to the data to slide through. - * @param[in] dataSize Size in T type elements wise. - * @param[in] windowSize Sliding window size in T type wise elements. - * @param[in] 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; - - /** - * @brief 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; - } - } - - /** - * @brief Checks if the next data portion is available. - * @return true if next data portion is available. - */ - virtual bool HasNext() { - return m_size + m_count * m_stride <= m_dataSize; - } - - /** - * @brief Reset the slider to the initial position. - */ - virtual void Reset() { - m_count = 0; - } - - /** - * @brief Resets the slider to the start of the new data. - * New data size MUST be the same as the old one. - * @param[in] newStart Pointer to the new data to slide through. - */ - virtual void Reset(T *newStart) { - m_start = newStart; - Reset(); - } - - /** - * @brief 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; - } - - /** - * @brief 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 uint32_t NextWindowStartIndex() { - return m_count == 0? 0: ((m_count) * m_stride); - } - - /** - * @brief Go to given sliding window index. - * @param[in] 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; - } - - /** - * @brief Calculates whole number of times the window can stride through the given data. - * @return Maximum number of whole strides. - */ - size_t TotalStrides() { - if (m_size > m_dataSize) { - return 0; - } - return ((m_dataSize - m_size)/m_stride); - } - - - 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; - }; - - /* - * Sliding window that will cover the whole length of the input, even if - * this means the last window is not a full window length. - */ - template<class T> - class FractionalSlidingWindow : public SlidingWindow<T> { - public: - using SlidingWindow<T>::SlidingWindow; - - /** - * @brief 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); - } - - /** - * @brief 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_dataSize < this->m_size) { - return 0; - } else { - return ((this->m_dataSize - this->m_size) / static_cast<float>(this->m_stride)); - } - } - }; - - -} /* namespace audio */ -} /* namespace app */ -} /* namespace arm */ - -#endif /* AUDIO_UTILS_HPP */
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