Initial community commit

1 files changed, 92 insertions, 0 deletions

diff --git a/Src/external_dependencies/openmpt-trunk/soundlib/MixFuncTable.cpp b/Src/external_dependencies/openmpt-trunk/soundlib/MixFuncTable.cpp
new file mode 100644
index 00000000..585f57c7
--- /dev/null
+++ b/Src/external_dependencies/openmpt-trunk/soundlib/MixFuncTable.cpp
@@ -0,0 +1,92 @@
+/*
+ * MixFuncTable.cpp
+ * ----------------
+ * Purpose: Table containing all mixer functions.
+ * Notes  : The Visual Studio project settings for this file have been adjusted
+ *          to force function inlining, so that the mixer has a somewhat acceptable
+ *          performance in debug mode. If you need to debug anything here, be sure
+ *          to disable those optimizations if needed.
+ * Authors: OpenMPT Devs
+ * The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
+ */
+
+
+#include "stdafx.h"
+
+#include "Mixer.h"
+#include "Snd_defs.h"
+#include "ModChannel.h"
+#include "MixFuncTable.h"
+
+#ifdef MPT_INTMIXER
+#include "IntMixer.h"
+#else
+#include "FloatMixer.h"
+#endif // MPT_INTMIXER
+
+OPENMPT_NAMESPACE_BEGIN
+
+namespace MixFuncTable
+{
+#ifdef MPT_INTMIXER
+using I8M = Int8MToIntS;
+using I16M = Int16MToIntS;
+using I8S = Int8SToIntS;
+using I16S = Int16SToIntS;
+#else
+using I8M = Int8MToFloatS;
+using I16M = Int16MToFloatS;
+using I8S = Int8SToFloatS;
+using I16S = Int16SToFloatS;
+#endif // MPT_INTMIXER
+
+// Build mix function table for given resampling, filter and ramping settings: One function each for 8-Bit / 16-Bit Mono / Stereo
+#define BuildMixFuncTableRamp(resampling, filter, ramp) \
+	SampleLoop<I8M, resampling<I8M>, filter<I8M>, MixMono ## ramp<I8M> >, \
+	SampleLoop<I16M, resampling<I16M>, filter<I16M>, MixMono ## ramp<I16M> >, \
+	SampleLoop<I8S, resampling<I8S>, filter<I8S>, MixStereo ## ramp<I8S> >, \
+	SampleLoop<I16S, resampling<I16S>, filter<I16S>, MixStereo ## ramp<I16S> >
+
+// Build mix function table for given resampling, filter settings: With and without ramping
+#define BuildMixFuncTableFilter(resampling, filter) \
+	BuildMixFuncTableRamp(resampling, filter, NoRamp), \
+	BuildMixFuncTableRamp(resampling, filter, Ramp)
+
+// Build mix function table for given resampling settings: With and without filter
+#define BuildMixFuncTable(resampling) \
+	BuildMixFuncTableFilter(resampling, NoFilter), \
+	BuildMixFuncTableFilter(resampling, ResonantFilter)
+
+const MixFuncInterface Functions[6 * 16] =
+{
+	BuildMixFuncTable(NoInterpolation),        // No SRC
+	BuildMixFuncTable(LinearInterpolation),    // Linear SRC
+	BuildMixFuncTable(FastSincInterpolation),  // Fast Sinc (Cubic Spline) SRC
+	BuildMixFuncTable(PolyphaseInterpolation), // Kaiser SRC
+	BuildMixFuncTable(FIRFilterInterpolation), // FIR SRC
+	BuildMixFuncTable(AmigaBlepInterpolation), // Amiga emulation
+};
+
+#undef BuildMixFuncTableRamp
+#undef BuildMixFuncTableFilter
+#undef BuildMixFuncTable
+
+
+ResamplingIndex ResamplingModeToMixFlags(ResamplingMode resamplingMode)
+{
+	switch(resamplingMode)
+	{
+	case SRCMODE_NEAREST: return ndxNoInterpolation;
+	case SRCMODE_LINEAR:  return ndxLinear;
+	case SRCMODE_CUBIC:   return ndxFastSinc;
+	case SRCMODE_SINC8LP: return ndxKaiser;
+	case SRCMODE_SINC8:   return ndxFIRFilter;
+	case SRCMODE_AMIGA:   return ndxAmigaBlep;
+	default:              MPT_ASSERT_NOTREACHED();
+	}
+	return ndxNoInterpolation;
+}
+
+} // namespace MixFuncTable
+
+OPENMPT_NAMESPACE_END