1 files changed, 109 insertions, 0 deletions
diff --git a/sc4pd/headers/plugin_interface/SC_SndBuf.h b/sc4pd/headers/plugin_interface/SC_SndBuf.h
new file mode 100644
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+++ b/sc4pd/headers/plugin_interface/SC_SndBuf.h
@@ -0,0 +1,109 @@
+/*
+	SuperCollider real time audio synthesis system
+    Copyright (c) 2002 James McCartney. All rights reserved.
+	http://www.audiosynth.com
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#ifndef _SndBuf_
+#define _SndBuf_
+
+#include <sys/types.h>
+#include <sndfile.h>
+
+struct SndBuf
+{
+	double samplerate;
+	double sampledur; // = 1/ samplerate
+	float *data;
+	int channels;
+	int samples;
+	int frames;
+	int mask;	// for delay lines
+	int mask1;	// for interpolating oscillators.
+	int coord;	// used by fft ugens
+	SNDFILE *sndfile; // used by disk i/o
+};
+typedef struct SndBuf SndBuf;
+
+struct SndBufUpdates
+{
+	int reads;
+	int writes;
+};
+typedef struct SndBufUpdates SndBufUpdates;
+
+enum { coord_None, coord_Complex, coord_Polar };
+
+
+inline float PhaseFrac(unsigned long inPhase) 
+		{
+			union { unsigned long itemp; float ftemp; } u;
+			u.itemp = 0x3F800000 | (0x007FFF80 & ((inPhase)<<7));
+			return u.ftemp - 1.f;
+		}
+		
+inline float PhaseFrac1(unsigned long inPhase) 
+		{
+			union { unsigned long itemp; float ftemp; } u;
+			u.itemp = 0x3F800000 | (0x007FFF80 & ((inPhase)<<7));
+			return u.ftemp;
+		}
+
+inline float lookup(float *table, int32 phase, int32 mask)
+{
+	return table[(phase >> 16) & mask];
+}
+
+
+#define xlobits 14
+#define xlobits1 13
+
+inline float lookupi(float *table, uint32 phase, uint32 mask)
+{
+	float frac = PhaseFrac(phase);
+	float *tbl = table + ((phase >> 16) & mask);
+	float a = tbl[0];
+	float b = tbl[1];
+	return a + frac * (b - a);
+}
+
+inline float lookupi2(float *table, uint32 phase, uint32 mask)
+{
+	float frac = PhaseFrac1(phase);
+	float *tbl = table + ((phase >> 16) & mask);
+	float a = tbl[0];
+	float b = tbl[1];
+	return a + frac * b;
+}
+
+inline float lookupi1(float* table0, float* table1, uint32 pphase, int32 lomask)
+{
+	float pfrac = PhaseFrac1(pphase);
+	uint32 index = ((pphase >> xlobits1) & lomask);
+	float val1 = *(float*)((char*)table0 + index);
+	float val2 = *(float*)((char*)table1 + index);
+	return val1 + val2 * pfrac;
+}
+
+
+inline float lininterp(float x, float a, float b)
+{
+	return a + x * (b - a);
+}
+
+
+#endif