CARPLAY版本整理
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MXC_A27-PCB4.5-270T/lib/faad2/libfaad/fixed.h
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287
MXC_A27-PCB4.5-270T/lib/faad2/libfaad/fixed.h
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/*
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** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
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** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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**
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** Any non-GPL usage of this software or parts of this software is strictly
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** forbidden.
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**
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** The "appropriate copyright message" mentioned in section 2c of the GPLv2
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** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
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**
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** Commercial non-GPL licensing of this software is possible.
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** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
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**
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** $Id: fixed.h,v 1.32 2007/11/01 12:33:30 menno Exp $
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**/
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#ifndef __FIXED_H__
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#define __FIXED_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined(_WIN32_WCE) && defined(_ARM_)
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#include <cmnintrin.h>
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#endif
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#define COEF_BITS 28
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#define COEF_PRECISION (1 << COEF_BITS)
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#define REAL_BITS 14 // MAXIMUM OF 14 FOR FIXED POINT SBR
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#define REAL_PRECISION (1 << REAL_BITS)
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/* FRAC is the fractional only part of the fixed point number [0.0..1.0) */
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#define FRAC_SIZE 32 /* frac is a 32 bit integer */
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#define FRAC_BITS 31
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#define FRAC_PRECISION ((uint32_t)(1 << FRAC_BITS))
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#define FRAC_MAX 0x7FFFFFFF
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typedef int32_t real_t;
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#define REAL_CONST(A) (((A) >= 0) ? ((real_t)((A)*(REAL_PRECISION)+0.5)) : ((real_t)((A)*(REAL_PRECISION)-0.5)))
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#define COEF_CONST(A) (((A) >= 0) ? ((real_t)((A)*(COEF_PRECISION)+0.5)) : ((real_t)((A)*(COEF_PRECISION)-0.5)))
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#define FRAC_CONST(A) (((A) == 1.00) ? ((real_t)FRAC_MAX) : (((A) >= 0) ? ((real_t)((A)*(FRAC_PRECISION)+0.5)) : ((real_t)((A)*(FRAC_PRECISION)-0.5))))
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//#define FRAC_CONST(A) (((A) >= 0) ? ((real_t)((A)*(FRAC_PRECISION)+0.5)) : ((real_t)((A)*(FRAC_PRECISION)-0.5)))
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#define Q2_BITS 22
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#define Q2_PRECISION (1 << Q2_BITS)
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#define Q2_CONST(A) (((A) >= 0) ? ((real_t)((A)*(Q2_PRECISION)+0.5)) : ((real_t)((A)*(Q2_PRECISION)-0.5)))
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#if defined(_WIN32) && !defined(_WIN32_WCE)
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/* multiply with real shift */
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static INLINE real_t MUL_R(real_t A, real_t B)
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{
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_asm {
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mov eax,A
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imul B
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shrd eax,edx,REAL_BITS
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}
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}
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/* multiply with coef shift */
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static INLINE real_t MUL_C(real_t A, real_t B)
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{
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_asm {
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mov eax,A
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imul B
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shrd eax,edx,COEF_BITS
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}
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}
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static INLINE real_t MUL_Q2(real_t A, real_t B)
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{
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_asm {
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mov eax,A
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imul B
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shrd eax,edx,Q2_BITS
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}
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}
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static INLINE real_t MUL_SHIFT6(real_t A, real_t B)
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{
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_asm {
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mov eax,A
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imul B
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shrd eax,edx,6
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}
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}
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static INLINE real_t MUL_SHIFT23(real_t A, real_t B)
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{
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_asm {
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mov eax,A
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imul B
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shrd eax,edx,23
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}
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}
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#if 1
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static INLINE real_t _MulHigh(real_t A, real_t B)
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{
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_asm {
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mov eax,A
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imul B
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mov eax,edx
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}
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}
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/* multiply with fractional shift */
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static INLINE real_t MUL_F(real_t A, real_t B)
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{
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return _MulHigh(A,B) << (FRAC_SIZE-FRAC_BITS);
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}
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/* Complex multiplication */
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static INLINE void ComplexMult(real_t *y1, real_t *y2,
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real_t x1, real_t x2, real_t c1, real_t c2)
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{
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*y1 = (_MulHigh(x1, c1) + _MulHigh(x2, c2))<<(FRAC_SIZE-FRAC_BITS);
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*y2 = (_MulHigh(x2, c1) - _MulHigh(x1, c2))<<(FRAC_SIZE-FRAC_BITS);
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}
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#else
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static INLINE real_t MUL_F(real_t A, real_t B)
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{
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_asm {
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mov eax,A
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imul B
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shrd eax,edx,FRAC_BITS
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}
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}
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/* Complex multiplication */
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static INLINE void ComplexMult(real_t *y1, real_t *y2,
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real_t x1, real_t x2, real_t c1, real_t c2)
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{
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*y1 = MUL_F(x1, c1) + MUL_F(x2, c2);
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*y2 = MUL_F(x2, c1) - MUL_F(x1, c2);
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}
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#endif
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#elif defined(__GNUC__) && defined (__arm__)
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/* taken from MAD */
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#define arm_mul(x, y, SCALEBITS) \
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({ \
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uint32_t __hi; \
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uint32_t __lo; \
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uint32_t __result; \
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asm("smull %0, %1, %3, %4\n\t" \
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"movs %0, %0, lsr %5\n\t" \
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"adc %2, %0, %1, lsl %6" \
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: "=&r" (__lo), "=&r" (__hi), "=r" (__result) \
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: "%r" (x), "r" (y), \
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"M" (SCALEBITS), "M" (32 - (SCALEBITS)) \
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: "cc"); \
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__result; \
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})
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static INLINE real_t MUL_R(real_t A, real_t B)
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{
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return arm_mul(A, B, REAL_BITS);
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}
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static INLINE real_t MUL_C(real_t A, real_t B)
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{
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return arm_mul(A, B, COEF_BITS);
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}
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static INLINE real_t MUL_Q2(real_t A, real_t B)
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{
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return arm_mul(A, B, Q2_BITS);
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}
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static INLINE real_t MUL_SHIFT6(real_t A, real_t B)
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{
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return arm_mul(A, B, 6);
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}
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static INLINE real_t MUL_SHIFT23(real_t A, real_t B)
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{
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return arm_mul(A, B, 23);
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}
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static INLINE real_t _MulHigh(real_t x, real_t y)
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{
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uint32_t __lo;
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uint32_t __hi;
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asm("smull\t%0, %1, %2, %3"
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: "=&r"(__lo),"=&r"(__hi)
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: "%r"(x),"r"(y)
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: "cc");
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return __hi;
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}
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static INLINE real_t MUL_F(real_t A, real_t B)
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{
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return _MulHigh(A, B) << (FRAC_SIZE-FRAC_BITS);
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}
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/* Complex multiplication */
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static INLINE void ComplexMult(real_t *y1, real_t *y2,
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real_t x1, real_t x2, real_t c1, real_t c2)
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{
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int32_t tmp, yt1, yt2;
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asm("smull %0, %1, %4, %6\n\t"
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"smlal %0, %1, %5, %7\n\t"
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"rsb %3, %4, #0\n\t"
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"smull %0, %2, %5, %6\n\t"
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"smlal %0, %2, %3, %7"
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: "=&r" (tmp), "=&r" (yt1), "=&r" (yt2), "=r" (x1)
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: "3" (x1), "r" (x2), "r" (c1), "r" (c2)
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: "cc" );
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*y1 = yt1 << (FRAC_SIZE-FRAC_BITS);
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*y2 = yt2 << (FRAC_SIZE-FRAC_BITS);
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}
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#else
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/* multiply with real shift */
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#define MUL_R(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (REAL_BITS-1))) >> REAL_BITS)
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/* multiply with coef shift */
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#define MUL_C(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (COEF_BITS-1))) >> COEF_BITS)
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/* multiply with fractional shift */
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#if defined(_WIN32_WCE) && defined(_ARM_)
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/* eVC for PocketPC has an intrinsic function that returns only the high 32 bits of a 32x32 bit multiply */
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static INLINE real_t MUL_F(real_t A, real_t B)
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{
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return _MulHigh(A,B) << (32-FRAC_BITS);
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}
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#else
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#ifdef __BFIN__
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#define _MulHigh(X,Y) ({ int __xxo; \
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asm ( \
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"a1 = %2.H * %1.L (IS,M);\n\t" \
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"a0 = %1.H * %2.H, a1+= %1.H * %2.L (IS,M);\n\t"\
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"a1 = a1 >>> 16;\n\t" \
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"%0 = (a0 += a1);\n\t" \
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: "=d" (__xxo) : "d" (X), "d" (Y) : "A0","A1"); __xxo; })
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#define MUL_F(X,Y) ({ int __xxo; \
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asm ( \
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"a1 = %2.H * %1.L (M);\n\t" \
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"a0 = %1.H * %2.H, a1+= %1.H * %2.L (M);\n\t" \
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"a1 = a1 >>> 16;\n\t" \
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"%0 = (a0 += a1);\n\t" \
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: "=d" (__xxo) : "d" (X), "d" (Y) : "A0","A1"); __xxo; })
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#else
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#define _MulHigh(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (FRAC_SIZE-1))) >> FRAC_SIZE)
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#define MUL_F(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (FRAC_BITS-1))) >> FRAC_BITS)
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#endif
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#endif
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#define MUL_Q2(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (Q2_BITS-1))) >> Q2_BITS)
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#define MUL_SHIFT6(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (6-1))) >> 6)
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#define MUL_SHIFT23(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (23-1))) >> 23)
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/* Complex multiplication */
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static INLINE void ComplexMult(real_t *y1, real_t *y2,
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real_t x1, real_t x2, real_t c1, real_t c2)
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{
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*y1 = (_MulHigh(x1, c1) + _MulHigh(x2, c2))<<(FRAC_SIZE-FRAC_BITS);
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*y2 = (_MulHigh(x2, c1) - _MulHigh(x1, c2))<<(FRAC_SIZE-FRAC_BITS);
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}
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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