diff options
Diffstat (limited to 'drivers/mpc/mpcmath.h')
| -rw-r--r-- | drivers/mpc/mpcmath.h | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/drivers/mpc/mpcmath.h b/drivers/mpc/mpcmath.h deleted file mode 100644 index fa83cf8374..0000000000 --- a/drivers/mpc/mpcmath.h +++ /dev/null @@ -1,153 +0,0 @@ -/* - * Musepack audio compression - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include <mpc/mpc_types.h> - -typedef union mpc_floatint -{ - float f; - mpc_int32_t n; -} mpc_floatint; - -typedef union mpc_doubleint -{ - double d; - mpc_int32_t n[2]; -} mpc_doubleint; - -static mpc_inline mpc_int32_t mpc_lrintf(float fVal) -{ - mpc_floatint tmp; - tmp.f = fVal + 0x00FF8000; - return tmp.n - 0x4B7F8000; -} - -#define mpc_round32 mpc_lrintf -#define mpc_nearbyintf mpc_lrintf - - -#ifndef M_PI -# define M_PI 3.1415926535897932384626433832795029 // 4*atan(1) -# define M_PIl 3.1415926535897932384626433832795029L -# define M_LN2 0.6931471805599453094172321214581766 // ln(2) -# define M_LN2l 0.6931471805599453094172321214581766L -# define M_LN10 2.3025850929940456840179914546843642 // ln 10 */ -# define M_LN10l 2.3025850929940456840179914546843642L -#endif - -// fast but maybe more inaccurate, use if you need speed -#if defined(__GNUC__) && !defined(__APPLE__) -# define SIN(x) sinf ((float)(x)) -# define COS(x) cosf ((float)(x)) -# define ATAN2(x,y) atan2f ((float)(x), (float)(y)) -# define SQRT(x) sqrtf ((float)(x)) -# define LOG(x) logf ((float)(x)) -# define LOG10(x) log10f ((float)(x)) -# define POW(x,y) expf (logf(x) * (y)) -# define POW10(x) expf (M_LN10 * (x)) -# define FLOOR(x) floorf ((float)(x)) -# define IFLOOR(x) (int) floorf ((float)(x)) -# define FABS(x) fabsf ((float)(x)) -#else -# define SIN(x) (float) sin (x) -# define COS(x) (float) cos (x) -# define ATAN2(x,y) (float) atan2 (x, y) -# define SQRT(x) (float) sqrt (x) -# define LOG(x) (float) log (x) -# define LOG10(x) (float) log10 (x) -# define POW(x,y) (float) pow (x,y) -# define POW10(x) (float) pow (10., (x)) -# define FLOOR(x) (float) floor (x) -# define IFLOOR(x) (int) floor (x) -# define FABS(x) (float) fabs (x) -#endif - -#define SQRTF(x) SQRT (x) -#ifdef FAST_MATH -# define TABSTEP 64 -# define COSF(x) my_cos ((float)(x)) -# define ATAN2F(x,y) my_atan2 ((float)(x), (float)(y)) -# define IFLOORF(x) my_ifloor ((float)(x)) - -void Init_FastMath ( void ); -extern const float tabatan2 [] [2]; -extern const float tabcos [] [2]; -extern const float tabsqrt_ex []; -extern const float tabsqrt_m [] [2]; - -static mpc_inline float my_atan2 ( float x, float y ) -{ - float t, ret; int i; mpc_floatint mx, my; - - mx.f = x; - my.f = y; - if ( (mx.n & 0x7FFFFFFF) < (my.n & 0x7FFFFFFF) ) { - i = mpc_round32 (t = TABSTEP * (mx.f / my.f)); - ret = tabatan2 [1*TABSTEP+i][0] + tabatan2 [1*TABSTEP+i][1] * (t-i); - if ( my.n < 0 ) - ret = (float)(ret - M_PI); - } - else if ( mx.n < 0 ) { - i = mpc_round32 (t = TABSTEP * (my.f / mx.f)); - ret = - M_PI/2 - tabatan2 [1*TABSTEP+i][0] + tabatan2 [1*TABSTEP+i][1] * (i-t); - } - else if ( mx.n > 0 ) { - i = mpc_round32 (t = TABSTEP * (my.f / mx.f)); - ret = + M_PI/2 - tabatan2 [1*TABSTEP+i][0] + tabatan2 [1*TABSTEP+i][1] * (i-t); - } - else { - ret = 0.; - } - return ret; -} - - -static mpc_inline float my_cos ( float x ) -{ - float t, ret; int i; - i = mpc_round32 (t = TABSTEP * x); - ret = tabcos [13*TABSTEP+i][0] + tabcos [13*TABSTEP+i][1] * (t-i); - return ret; -} - - -static mpc_inline int my_ifloor ( float x ) -{ - mpc_floatint mx; - mx.f = (float) (x + (0x0C00000L + 0.500000001)); - return mx.n - 1262485505; -} - - -static mpc_inline float my_sqrt ( float x ) -{ - float ret; int i, ex; mpc_floatint mx; - mx.f = x; - ex = mx.n >> 23; // get the exponent - mx.n = (mx.n & 0x7FFFFF) | 0x42800000; // delete the exponent - i = mpc_round32 (mx.f); // Integer-part of the mantissa (round ????????????) - ret = tabsqrt_m [i-TABSTEP][0] + tabsqrt_m [i-TABSTEP][1] * (mx.f-i); // calculate value - ret *= tabsqrt_ex [ex]; - return ret; -} -#else -# define COSF(x) COS (x) -# define ATAN2F(x,y) ATAN2 (x,y) -# define IFLOORF(x) IFLOOR (x) -#endif - |