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