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Diffstat (limited to 'Tremolo/misc.h')
| -rw-r--r-- | Tremolo/misc.h | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/Tremolo/misc.h b/Tremolo/misc.h deleted file mode 100644 index b6b9386..0000000 --- a/Tremolo/misc.h +++ /dev/null @@ -1,192 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. * - * * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003 * - * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ * - * * - ******************************************************************** - - function: miscellaneous math and prototypes - - ********************************************************************/ - -#ifndef _V_RANDOM_H_ -#define _V_RANDOM_H_ -#include "ivorbiscodec.h" -#include "os_types.h" - -/*#define _VDBG_GRAPHFILE "_0.m"*/ - - -#ifdef _VDBG_GRAPHFILE -extern void *_VDBG_malloc(void *ptr,long bytes,char *file,long line); -extern void _VDBG_free(void *ptr,char *file,long line); - -#undef _ogg_malloc -#undef _ogg_calloc -#undef _ogg_realloc -#undef _ogg_free - -#define _ogg_malloc(x) _VDBG_malloc(NULL,(x),__FILE__,__LINE__) -#define _ogg_calloc(x,y) _VDBG_malloc(NULL,(x)*(y),__FILE__,__LINE__) -#define _ogg_realloc(x,y) _VDBG_malloc((x),(y),__FILE__,__LINE__) -#define _ogg_free(x) _VDBG_free((x),__FILE__,__LINE__) -#endif - -#include "asm_arm.h" - -#ifndef _V_WIDE_MATH -#define _V_WIDE_MATH - -#ifndef _LOW_ACCURACY_ -/* 64 bit multiply */ - -#include <sys/types.h> - -#if BYTE_ORDER==LITTLE_ENDIAN -union magic { - struct { - ogg_int32_t lo; - ogg_int32_t hi; - } halves; - ogg_int64_t whole; -}; -#endif - -#if BYTE_ORDER==BIG_ENDIAN -union magic { - struct { - ogg_int32_t hi; - ogg_int32_t lo; - } halves; - ogg_int64_t whole; -}; -#endif - -static inline ogg_int32_t MULT32(ogg_int32_t x, ogg_int32_t y) { - union magic magic; - magic.whole = (ogg_int64_t)x * y; - return magic.halves.hi; -} - -static inline ogg_int32_t MULT31(ogg_int32_t x, ogg_int32_t y) { - return MULT32(x,y)<<1; -} - -static inline ogg_int32_t MULT31_SHIFT15(ogg_int32_t x, ogg_int32_t y) { - union magic magic; - magic.whole = (ogg_int64_t)x * y; - return ((ogg_uint32_t)(magic.halves.lo)>>15) | ((magic.halves.hi)<<17); -} - -#else -/* 32 bit multiply, more portable but less accurate */ - -/* - * Note: Precision is biased towards the first argument therefore ordering - * is important. Shift values were chosen for the best sound quality after - * many listening tests. - */ - -/* - * For MULT32 and MULT31: The second argument is always a lookup table - * value already preshifted from 31 to 8 bits. We therefore take the - * opportunity to save on text space and use unsigned char for those - * tables in this case. - */ - -static inline ogg_int32_t MULT32(ogg_int32_t x, ogg_int32_t y) { - return (x >> 9) * y; /* y preshifted >>23 */ -} - -static inline ogg_int32_t MULT31(ogg_int32_t x, ogg_int32_t y) { - return (x >> 8) * y; /* y preshifted >>23 */ -} - -static inline ogg_int32_t MULT31_SHIFT15(ogg_int32_t x, ogg_int32_t y) { - return (x >> 6) * y; /* y preshifted >>9 */ -} - -#endif - -/* - * This should be used as a memory barrier, forcing all cached values in - * registers to wr writen back to memory. Might or might not be beneficial - * depending on the architecture and compiler. - */ -#define MB() - -/* - * The XPROD functions are meant to optimize the cross products found all - * over the place in mdct.c by forcing memory operation ordering to avoid - * unnecessary register reloads as soon as memory is being written to. - * However this is only beneficial on CPUs with a sane number of general - * purpose registers which exclude the Intel x86. On Intel, better let the - * compiler actually reload registers directly from original memory by using - * macros. - */ - -#ifdef __i386__ - -#define XPROD32(_a, _b, _t, _v, _x, _y) \ - { *(_x)=MULT32(_a,_t)+MULT32(_b,_v); \ - *(_y)=MULT32(_b,_t)-MULT32(_a,_v); } -#define XPROD31(_a, _b, _t, _v, _x, _y) \ - { *(_x)=MULT31(_a,_t)+MULT31(_b,_v); \ - *(_y)=MULT31(_b,_t)-MULT31(_a,_v); } -#define XNPROD31(_a, _b, _t, _v, _x, _y) \ - { *(_x)=MULT31(_a,_t)-MULT31(_b,_v); \ - *(_y)=MULT31(_b,_t)+MULT31(_a,_v); } - -#else - -static inline void XPROD32(ogg_int32_t a, ogg_int32_t b, - ogg_int32_t t, ogg_int32_t v, - ogg_int32_t *x, ogg_int32_t *y) -{ - *x = MULT32(a, t) + MULT32(b, v); - *y = MULT32(b, t) - MULT32(a, v); -} - -static inline void XPROD31(ogg_int32_t a, ogg_int32_t b, - ogg_int32_t t, ogg_int32_t v, - ogg_int32_t *x, ogg_int32_t *y) -{ - *x = MULT31(a, t) + MULT31(b, v); - *y = MULT31(b, t) - MULT31(a, v); -} - -static inline void XNPROD31(ogg_int32_t a, ogg_int32_t b, - ogg_int32_t t, ogg_int32_t v, - ogg_int32_t *x, ogg_int32_t *y) -{ - *x = MULT31(a, t) - MULT31(b, v); - *y = MULT31(b, t) + MULT31(a, v); -} - -#endif - -#endif - -#ifndef _V_CLIP_MATH -#define _V_CLIP_MATH - -static inline ogg_int32_t CLIP_TO_15(ogg_int32_t x) { - int ret=x; - ret-= ((x<=32767)-1)&(x-32767); - ret-= ((x>=-32768)-1)&(x+32768); - return(ret); -} - -#endif - -#endif - - - - |