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engine/audio/private/snd_fixedint.h

@@ -0,0 +1,40 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose:
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef SND_FIXEDINT_H
+#define SND_FIXEDINT_H
+
+#if defined( _WIN32 )
+#pragma once
+#endif
+
+// fixed point stuff for real-time resampling
+#define FIX_BITS			28
+#define FIX_SCALE			(1 << FIX_BITS)
+#define FIX_MASK			((1 << FIX_BITS)-1)
+#define FIX_FLOAT(a)		((int)((a) * FIX_SCALE))
+#define FIX(a)				(((int)(a)) << FIX_BITS)
+#define FIX_INTPART(a)		(((int)(a)) >> FIX_BITS)
+#define FIX_FRACTION(a,b)	(FIX(a)/(b))
+#define FIX_FRACPART(a)		((a) & FIX_MASK)
+#define FIX_TODOUBLE(a)		((double)(a) / (double)FIX_SCALE)
+
+typedef unsigned int fixedint;
+
+#define FIX_BITS14			14
+#define FIX_SCALE14			(1 << FIX_BITS14)
+#define FIX_MASK14			((1 << FIX_BITS14)-1)
+#define FIX_FLOAT14(a)		((int)((a) * FIX_SCALE14))
+#define FIX14(a)			(((int)(a)) << FIX_BITS14)
+#define FIX_INTPART14(a)	(((int)(a)) >> FIX_BITS14)
+#define FIX_FRACTION14(a,b)	(FIX14(a)/(b))
+#define FIX_FRACPART14(a)	((a) & FIX_MASK14)
+#define FIX_14TODOUBLE(a)	((double)(a) / (double)FIX_SCALE14)
+
+#define FIX_28TO14(a)		( (int)( ((unsigned int)(a)) >> (FIX_BITS - 14) ) )
+
+#endif // SND_FIXEDINT_H