1 files changed, 0 insertions, 101 deletions
diff --git a/lib/libmodplug/src/snd_flt.cpp b/lib/libmodplug/src/snd_flt.cpp
deleted file mode 100644
index f8a573cbe6..0000000000
--- a/lib/libmodplug/src/snd_flt.cpp
+++ /dev/null
@@ -1,101 +0,0 @@
-/*
- * This source code is public domain.
- *
- * Authors: Olivier Lapicque <olivierl@jps.net>
-*/
-
-#include "stdafx.h"
-#include "sndfile.h"
-
-// AWE32: cutoff = reg[0-255] * 31.25 + 100 -> [100Hz-8060Hz]
-// EMU10K1 docs: cutoff = reg[0-127]*62+100
-#define FILTER_PRECISION	8192
-
-#ifndef NO_FILTER
-
-#ifdef MSC_VER
-#define _ASM_MATH
-#endif
-
-#ifdef _ASM_MATH
-
-// pow(a,b) returns a^^b -> 2^^(b.log2(a))
-static float pow(float a, float b)
-{
-	long tmpint;
-	float result;
-	_asm {
-	fld b				// Load b
-	fld a				// Load a
-	fyl2x				// ST(0) = b.log2(a)
-	fist tmpint			// Store integer exponent
-	fisub tmpint		// ST(0) = -1 <= (b*log2(a)) <= 1
-	f2xm1				// ST(0) = 2^(x)-1
-	fild tmpint			// load integer exponent
-	fld1				// Load 1
-	fscale				// ST(0) = 2^ST(1)
-	fstp ST(1)			// Remove the integer from the stack
-	fmul ST(1), ST(0)	// multiply with fractional part
-	faddp ST(1), ST(0)	// add integer_part
-	fstp result			// Store the result
-	}
-	return result;
-}
-
-
-#else
-
-#include <math.h>
-
-#endif // _ASM_MATH
-
-
-DWORD CSoundFile::CutOffToFrequency(UINT nCutOff, int flt_modifier) const
-//-----------------------------------------------------------------------
-{
-	float Fc;
-
-	if (m_dwSongFlags & SONG_EXFILTERRANGE)
-		Fc = 110.0f * pow(2.0f, 0.25f + ((float)(nCutOff*(flt_modifier+256)))/(21.0f*512.0f));
-	else
-		Fc = 110.0f * pow(2.0f, 0.25f + ((float)(nCutOff*(flt_modifier+256)))/(24.0f*512.0f));
-	LONG freq = (LONG)Fc;
-	if (freq < 120) return 120;
-	if (freq > 10000) return 10000;
-	if (freq*2 > (LONG)gdwMixingFreq) freq = gdwMixingFreq>>1;
-	return (DWORD)freq;
-}
-
-
-// Simple 2-poles resonant filter
-void CSoundFile::SetupChannelFilter(MODCHANNEL *pChn, BOOL bReset, int flt_modifier) const
-//----------------------------------------------------------------------------------------
-{
-	float fc = (float)CutOffToFrequency(pChn->nCutOff, flt_modifier);
-	float fs = (float)gdwMixingFreq;
-	float fg, fb0, fb1;
-
-	fc *= (float)(2.0*3.14159265358/fs);
-	float dmpfac = pow(10.0f, -((24.0f / 128.0f)*(float)pChn->nResonance) / 20.0f);
-	float d = (1.0f-2.0f*dmpfac)* fc;
-	if (d>2.0) d = 2.0;
-	d = (2.0f*dmpfac - d)/fc;
-	float e = pow(1.0f/fc,2.0f);
-
-	fg=1/(1+d+e);
-	fb0=(d+e+e)/(1+d+e);
-	fb1=-e/(1+d+e);
-
-	pChn->nFilter_A0 = (int)(fg * FILTER_PRECISION);
-	pChn->nFilter_B0 = (int)(fb0 * FILTER_PRECISION);
-	pChn->nFilter_B1 = (int)(fb1 * FILTER_PRECISION);
-
-	if (bReset)
-	{
-		pChn->nFilter_Y1 = pChn->nFilter_Y2 = 0;
-		pChn->nFilter_Y3 = pChn->nFilter_Y4 = 0;
-	}
-	pChn->dwFlags |= CHN_FILTER;
-}
-
-#endif // NO_FILTER