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audio/softsynth/mt32/srchelper/SamplerateAdapter.h

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+/* Copyright (C) 2015-2022 Sergey V. Mikayev
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation, either version 2.1 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 Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MT32EMU_SAMPLERATE_ADAPTER_H
+#define MT32EMU_SAMPLERATE_ADAPTER_H
+
+#include <samplerate.h>
+
+#include "../Enumerations.h"
+
+namespace MT32Emu {
+
+class Synth;
+
+class SamplerateAdapter {
+public:
+	SamplerateAdapter(Synth &synth, double targetSampleRate, SamplerateConversionQuality quality);
+	~SamplerateAdapter();
+
+	void getOutputSamples(float *outBuffer, unsigned int length);
+
+private:
+	Synth &synth;
+	float * const inBuffer;
+	unsigned int inBufferSize;
+	const double inputToOutputRatio;
+	const double outputToInputRatio;
+	SRC_STATE *resampler;
+
+	static long getInputSamples(void *cb_data, float **data);
+};
+
+} // namespace MT32Emu
+
+#endif // MT32EMU_SAMPLERATE_ADAPTER_H