Updated the Munt code to 2.4.0 (port from VARCem).

src/sound/munt/SampleRateConverter.cpp

@@ -1,4 +1,4 @@
-/* Copyright (C) 2015-2017 Sergey V. Mikayev
+/* Copyright (C) 2015-2020 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
@@ -14,13 +14,15 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <cstddef>
+
 #include "SampleRateConverter.h"
 
 #if MT32EMU_WITH_LIBSOXR_RESAMPLER
 #include "srchelper/SoxrAdapter.h"
 #elif MT32EMU_WITH_LIBSAMPLERATE_RESAMPLER
 #include "srchelper/SamplerateAdapter.h"
-#else
+#elif MT32EMU_WITH_INTERNAL_RESAMPLER
 #include "srchelper/InternalResampler.h"
 #endif
 
@@ -33,8 +35,11 @@ static inline void *createDelegate(Synth &synth, double targetSampleRate, Sample
 	return new SoxrAdapter(synth, targetSampleRate, quality);
 #elif MT32EMU_WITH_LIBSAMPLERATE_RESAMPLER
 	return new SamplerateAdapter(synth, targetSampleRate, quality);
-#else
+#elif MT32EMU_WITH_INTERNAL_RESAMPLER
 	return new InternalResampler(synth, targetSampleRate, quality);
+#else
+	(void)synth, (void)targetSampleRate, (void)quality;
+	return NULL;
 #endif
 }
 
@@ -47,6 +52,15 @@ AnalogOutputMode SampleRateConverter::getBestAnalogOutputMode(double targetSampl
 	return AnalogOutputMode_COARSE;
 }
 
+double SampleRateConverter::getSupportedOutputSampleRate(double desiredSampleRate) {
+#if MT32EMU_WITH_LIBSOXR_RESAMPLER || MT32EMU_WITH_LIBSAMPLERATE_RESAMPLER || MT32EMU_WITH_INTERNAL_RESAMPLER
+	return desiredSampleRate > 0 ? desiredSampleRate : 0;
+#else
+	(void)desiredSampleRate;
+	return 0;
+#endif
+}
+
 SampleRateConverter::SampleRateConverter(Synth &useSynth, double targetSampleRate, SamplerateConversionQuality useQuality) :
 	synthInternalToTargetSampleRateRatio(SAMPLE_RATE / targetSampleRate),
 	useSynthDelegate(useSynth.getStereoOutputSampleRate() == targetSampleRate),
@@ -59,7 +73,7 @@ SampleRateConverter::~SampleRateConverter() {
 		delete static_cast<SoxrAdapter *>(srcDelegate);
 #elif MT32EMU_WITH_LIBSAMPLERATE_RESAMPLER
 		delete static_cast<SamplerateAdapter *>(srcDelegate);
-#else
+#elif MT32EMU_WITH_INTERNAL_RESAMPLER
 		delete static_cast<InternalResampler *>(srcDelegate);
 #endif
 	}
@@ -75,8 +89,10 @@ void SampleRateConverter::getOutputSamples(float *buffer, unsigned int length) {
 	static_cast<SoxrAdapter *>(srcDelegate)->getOutputSamples(buffer, length);
 #elif MT32EMU_WITH_LIBSAMPLERATE_RESAMPLER
 	static_cast<SamplerateAdapter *>(srcDelegate)->getOutputSamples(buffer, length);
-#else
+#elif MT32EMU_WITH_INTERNAL_RESAMPLER
 	static_cast<InternalResampler *>(srcDelegate)->getOutputSamples(buffer, length);
+#else
+	Synth::muteSampleBuffer(buffer, length);
 #endif
 }