MT32: Update Munt to 2.0.1-pre

This update uses upstream commit
f88ef828a600ce66d1f730c8fb2a7f580f6f6165.

This update switches to use the new Munt C++ interface, which
will allow ScummVM to link to an external Munt library instead
of requiring it to be built-in in the future. For the moment,
the emulator is still built-in, since it is not available from
most package repositories.

The Munt driver in ScummVM now uses writeSysex instead of the
(now-private) playSysexWithoutFraming, per recommendation from
the Munt team <https://github.com/munt/munt/pull/30>.

This changeset also removes direct modifications that used to be
made to Munt code, to ease future updates. To update Munt code in
the future:

1. Replace all source files in the `softsynth/mt32` directory with
   new files from the upstream `mt32emu/src` directory;
2. Update `config.h` with the correct version number for the new
   version of Munt;
3. Update `module.mk` to add any new source files that need to be
   built.

1 files changed, 16 insertions, 11 deletions

diff --git a/audio/softsynth/mt32/Partial.cpp b/audio/softsynth/mt32/Partial.cpp
index 7348087509..6afef364df 100644..100755
--- a/audio/softsynth/mt32/Partial.cpp
+++ b/audio/softsynth/mt32/Partial.cpp
@@ -1,5 +1,5 @@
 /* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
- * Copyright (C) 2011, 2012, 2013, 2014 Dean Beeler, Jerome Fisher, Sergey V. Mikayev
+ * Copyright (C) 2011-2016 Dean Beeler, Jerome Fisher, 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
@@ -15,14 +15,19 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-//#include <cmath>
-//#include <cstdlib>
-//#include <cstring>
+#include <cstddef>
 
-#include "mt32emu.h"
-#include "mmath.h"
 #include "internals.h"
 
+#include "Partial.h"
+#include "Part.h"
+#include "Poly.h"
+#include "Synth.h"
+#include "Tables.h"
+#include "TVA.h"
+#include "TVF.h"
+#include "TVP.h"
+
 namespace MT32Emu {
 
 static const Bit8u PAN_NUMERATOR_MASTER[] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7};
@@ -54,7 +59,7 @@ int Partial::debugGetPartialNum() const {
 }
 
 // Only used for debugging purposes
-unsigned long Partial::debugGetSampleNum() const {
+Bit32u Partial::debugGetSampleNum() const {
 	return sampleNum;
 }
 
@@ -266,7 +271,7 @@ void Partial::backupCache(const PatchCache &cache) {
 	}
 }
 
-bool Partial::produceOutput(Sample *leftBuf, Sample *rightBuf, unsigned long length) {
+bool Partial::produceOutput(Sample *leftBuf, Sample *rightBuf, Bit32u length) {
 	if (!isActive() || alreadyOutputed || isRingModulatingSlave()) {
 		return false;
 	}
@@ -313,8 +318,8 @@ bool Partial::produceOutput(Sample *leftBuf, Sample *rightBuf, unsigned long len
 		// Though, it is unknown whether this overflow is exploited somewhere.
 		Sample leftOut = Sample((sample * leftPanValue) >> 8);
 		Sample rightOut = Sample((sample * rightPanValue) >> 8);
-		*leftBuf = Synth::clipSampleEx((SampleEx)*leftBuf + (SampleEx)leftOut);
-		*rightBuf = Synth::clipSampleEx((SampleEx)*rightBuf + (SampleEx)rightOut);
+		*leftBuf = Synth::clipSampleEx(SampleEx(*leftBuf) + SampleEx(leftOut));
+		*rightBuf = Synth::clipSampleEx(SampleEx(*rightBuf) + SampleEx(rightOut));
 		leftBuf++;
 		rightBuf++;
 #endif
@@ -341,4 +346,4 @@ void Partial::startDecayAll() {
 	tvf->startDecay();
 }
 
-}
+} // namespace MT32Emu