Implement buffering of visualizer samples read from the fifo

2020-12-16 19:28:16 +01:00
parent f4e032b047
commit 95c0678792
6 changed files with 280 additions and 57 deletions
--- a/src/utility/sample_buffer.h
+++ b/src/utility/sample_buffer.h
@@ -0,0 +1,47 @@
+/***************************************************************************
+ *   Copyright (C) 2008-2017 by Andrzej Rybczak                            *
+ *   electricityispower@gmail.com                                          *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.              *
+ ***************************************************************************/
+
+#ifndef NCMPCPP_SAMPLE_BUFFER_H
+#define NCMPCPP_SAMPLE_BUFFER_H
+
+#include <cstdint>
+#include <vector>
+
+struct SampleBuffer
+{
+	typedef std::vector<int16_t>::iterator Iterator;
+
+	SampleBuffer() : m_offset(0) { }
+
+	void put(Iterator begin, Iterator end);
+	size_t move(size_t elems, std::vector<int16_t> &dest);
+
+	void resize(size_t n);
+	void clear();
+
+	size_t size() const;
+	const std::vector<int16_t> &buffer() const;
+
+private:
+	size_t m_offset;
+	std::vector<int16_t> m_buffer;
+};
+
+#endif // NCMPCPP_SAMPLE_BUFFER_H