118 lines
3.2 KiB
C++
118 lines
3.2 KiB
C++
/*!
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* @file midi_RingBuffer.hpp
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* Project Arduino MIDI Library
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* @brief MIDI Library for Arduino - Ring Buffer
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* @author Francois Best
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* @date 10/10/2016
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* @license MIT - Copyright (c) 2016 Francois Best
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#pragma once
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template<typename DataType, int Size>
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RingBuffer<DataType, Size>::RingBuffer()
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: mWriteHead(mData)
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, mReadHead(mData)
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{
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memset(mData, DataType(0), Size * sizeof(DataType));
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}
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template<typename DataType, int Size>
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RingBuffer<DataType, Size>::~RingBuffer()
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{
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}
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// -----------------------------------------------------------------------------
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template<typename DataType, int Size>
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int RingBuffer<DataType, Size>::getLength() const
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{
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if (mReadHead == mWriteHead)
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{
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return 0;
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}
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else if (mWriteHead > mReadHead)
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{
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return int(mWriteHead - mReadHead);
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}
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else
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{
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return int(mWriteHead - mData) + Size - int(mReadHead - mData);
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}
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}
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template<typename DataType, int Size>
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bool RingBuffer<DataType, Size>::isEmpty() const
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{
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return mReadHead == mWriteHead;
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}
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// -----------------------------------------------------------------------------
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template<typename DataType, int Size>
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void RingBuffer<DataType, Size>::write(DataType inData)
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{
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*mWriteHead++ = inData;
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if (mWriteHead >= mData + Size)
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{
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mWriteHead = mData;
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}
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}
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template<typename DataType, int Size>
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void RingBuffer<DataType, Size>::write(const DataType* inData, int inSize)
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{
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for (int i = 0; i < inSize; ++i)
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{
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write(inData[i]);
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}
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}
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template<typename DataType, int Size>
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void RingBuffer<DataType, Size>::clear()
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{
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memset(mData, DataType(0), Size * sizeof(DataType));
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mReadHead = mData;
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mWriteHead = mData;
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}
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// -----------------------------------------------------------------------------
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template<typename DataType, int Size>
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DataType RingBuffer<DataType, Size>::read()
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{
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const DataType data = *mReadHead++;
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if (mReadHead >= mData + Size)
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{
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mReadHead = mData;
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}
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return data;
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}
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template<typename DataType, int Size>
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void RingBuffer<DataType, Size>::read(DataType* outData, int inSize)
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{
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for (int i = 0; i < inSize; ++i)
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{
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outData[i] = read();
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}
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}
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