MT32: Update Munt to 2.0.3

This update uses upstream commit
777c51cdb4dbb4e02a53c23edea9086f0b600e26.

The new SampleRateConverter is added, but not built as we don't use it.
Also, building it without source changes will need additional include
directories.

This update of Munt reduces the stack size, and thus fixes bug #9630.

1 files changed, 46 insertions, 0 deletions

diff --git a/audio/softsynth/mt32/srchelper/srctools/include/SincResampler.h b/audio/softsynth/mt32/srchelper/srctools/include/SincResampler.h
new file mode 100644
index 0000000000..ea3f03b112
--- /dev/null
+++ b/audio/softsynth/mt32/srchelper/srctools/include/SincResampler.h
@@ -0,0 +1,46 @@
+/* Copyright (C) 2015-2017 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 SINC_RESAMPLER_H
+#define SINC_RESAMPLER_H
+
+#include "FIRResampler.h"
+
+namespace SRCTools {
+
+class ResamplerStage;
+
+namespace SincResampler {
+
+	ResamplerStage *createSincResampler(const double inputFrequency, const double outputFrequency, const double passbandFrequency, const double stopbandFrequency, const double dbSNR, const unsigned int maxUpsampleFactor);
+
+	namespace Utils {
+		void computeResampleFactors(unsigned int &upsampleFactor, double &downsampleFactor, const double inputFrequency, const double outputFrequency, const unsigned int maxUpsampleFactor);
+		unsigned int greatestCommonDivisor(unsigned int a, unsigned int b);
+	}
+
+	namespace KaizerWindow {
+		double estimateBeta(double dbRipple);
+		unsigned int estimateOrder(double dbRipple, double fp, double fs);
+		double bessel(const double x);
+		void windowedSinc(FIRCoefficient kernel[], const unsigned int order, const double fc, const double beta, const double amp);
+	}
+
+} // namespace SincResampler
+
+} // namespace SRCTools
+
+#endif // SINC_RESAMPLER_H