Add refactored SampleBuffer

include/SampleBuffer2.h

@@ -0,0 +1,83 @@
+/*
+ * SampleBuffer2.h - container-class SampleBuffer2
+ *
+ * Copyright (c) 2005-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
+ *
+ * This file is part of LMMS - https://lmms.io
+ *
+ * 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 (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef LMMS_SAMPLE_BUFFER_H
+#define LMMS_SAMPLE_BUFFER_H
+
+#include <QByteArray>
+#include <QString>
+#include <optional>
+#include <samplerate.h>
+#include <vector>
+
+#include "AudioEngine.h"
+#include "Engine.h"
+#include "lmms_basics.h"
+#include "lmms_export.h"
+
+namespace lmms {
+class LMMS_EXPORT SampleBuffer2
+{
+public:
+	using value_type = sampleFrame;
+	using reference = sampleFrame&;
+	using const_iterator = std::vector<sampleFrame>::const_iterator;
+	using const_reverse_iterator = std::vector<sampleFrame>::const_reverse_iterator;
+	using difference_type = std::vector<sampleFrame>::difference_type;
+	using size_type = std::vector<sampleFrame>::size_type;
+
+	SampleBuffer2() = default;
+	SampleBuffer2(const QString& audioFile);
+	SampleBuffer2(const QByteArray& base64Data, int sampleRate);
+	SampleBuffer2(
+		const sampleFrame* data, int numFrames, int sampleRate = Engine::audioEngine()->processingSampleRate());
+
+	friend void swap(SampleBuffer2& first, SampleBuffer2& second) noexcept;
+	auto toBase64() const -> QString;
+
+	auto audioFile() const -> QString;
+	auto sampleRate() const -> sample_rate_t;
+
+	auto begin() const -> const_iterator;
+	auto end() const -> const_iterator;
+	auto rbegin() const -> const_reverse_iterator;
+	auto rend() const -> const_reverse_iterator;
+
+	auto data() const -> const sampleFrame*;
+	auto size() const -> size_type;
+	bool empty() const;
+
+private:
+	void decodeSampleSF(const QString& fileName);
+	void decodeSampleDS(const QString& fileName);
+
+private:
+	std::vector<sampleFrame> m_data;
+	std::optional<QString> m_audioFile;
+	int m_sampleRate = 0;
+};
+
+} // namespace lmms
+
+#endif // LMMS_SAMPLE_BUFFER_H