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delay/public/dsp_ringbuffer.hpp

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+/* 
+ * jayDSP, A cross-platform Digital Signal Processing library written in modern C++.
+ * Copyright (C) 2025 Jens Ahrensfeld, All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all 
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+ * File: dsp_ringbuffer.hpp
+ * Author Jens Ahrensfeld on 26.10.2025.
+ */
+
+#ifndef DSP_RINGBUFFER_H
+#define DSP_RINGBUFFER_H
+
+#include <cstddef>
+#include <cstdint>
+#include <math.h>
+#include <stdint.h>
+#include "../../dsp_types.hpp"
+
+namespace dsp {
+
+template <typename T>
+class RingBuffer 
+{
+	uint32_t m_index;
+	uint32_t m_mask;
+	size_t m_capacity;
+	vector<T> m_buffer;
+
+	public:
+	RingBuffer(size_t capacity)
+	: m_index(0)
+	, m_mask(0)
+	, m_capacity(0)
+	{
+		resize(capacity);
+	}
+
+	size_t capacity()
+	{
+		return m_buffer.capacity();
+	}
+	void resize(int capacity, T value=T())
+	{
+		m_capacity = 1;
+		while (m_capacity < capacity)
+		{
+			m_capacity *= 2;
+		}
+		 
+		m_buffer.assign(m_capacity, value);
+		m_mask = unsigned(m_capacity - 1);
+		m_index = 0;
+	}
+
+	void put(T sample)
+	{
+		m_index = (m_index + 1) & m_mask;
+		m_buffer[m_index] = sample;
+	}
+
+	T get(uint32_t delay = 0)
+	{
+		uint32_t i = (m_index - delay) & m_mask;
+		return m_buffer[i];
+	}
+};
+}
+
+#endif