mirror of
https://github.com/mpv-player/mpv
synced 2024-12-09 16:36:15 +00:00
5f5e40c155
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@14728 b3059339-0415-0410-9bf9-f77b7e298cf2
266 lines
7.0 KiB
C
266 lines
7.0 KiB
C
/*
|
|
** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
|
|
** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com
|
|
**
|
|
** This program is free software; you can redistribute it and/or modify
|
|
** it under the terms of the GNU General Public License as published by
|
|
** the Free Software Foundation; either version 2 of the License, or
|
|
** (at your option) any later version.
|
|
**
|
|
** This program 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 General Public License for more details.
|
|
**
|
|
** You should have received a copy of the GNU General Public License
|
|
** along with this program; if not, write to the Free Software
|
|
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
**
|
|
** Any non-GPL usage of this software or parts of this software is strictly
|
|
** forbidden.
|
|
**
|
|
** Commercial non-GPL licensing of this software is possible.
|
|
** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
|
|
**
|
|
** $Id: fixed.h,v 1.24 2004/06/30 12:45:56 menno Exp $
|
|
**/
|
|
|
|
#ifndef __FIXED_H__
|
|
#define __FIXED_H__
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#if defined(_WIN32_WCE) && defined(_ARM_)
|
|
#include <cmnintrin.h>
|
|
#endif
|
|
|
|
#define COEF_BITS 28
|
|
#define COEF_PRECISION (1 << COEF_BITS)
|
|
#define REAL_BITS 14 // MAXIMUM OF 14 FOR FIXED POINT SBR
|
|
#define REAL_PRECISION (1 << REAL_BITS)
|
|
|
|
/* FRAC is the fractional only part of the fixed point number [0.0..1.0) */
|
|
#define FRAC_SIZE 32 /* frac is a 32 bit integer */
|
|
#define FRAC_BITS 31
|
|
#define FRAC_PRECISION ((uint32_t)(1 << FRAC_BITS))
|
|
#define FRAC_MAX 0x7FFFFFFF
|
|
|
|
typedef int32_t real_t;
|
|
|
|
|
|
#define REAL_CONST(A) (((A) >= 0) ? ((real_t)((A)*(REAL_PRECISION)+0.5)) : ((real_t)((A)*(REAL_PRECISION)-0.5)))
|
|
#define COEF_CONST(A) (((A) >= 0) ? ((real_t)((A)*(COEF_PRECISION)+0.5)) : ((real_t)((A)*(COEF_PRECISION)-0.5)))
|
|
#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))))
|
|
//#define FRAC_CONST(A) (((A) >= 0) ? ((real_t)((A)*(FRAC_PRECISION)+0.5)) : ((real_t)((A)*(FRAC_PRECISION)-0.5)))
|
|
|
|
#define Q2_BITS 22
|
|
#define Q2_PRECISION (1 << Q2_BITS)
|
|
#define Q2_CONST(A) (((A) >= 0) ? ((real_t)((A)*(Q2_PRECISION)+0.5)) : ((real_t)((A)*(Q2_PRECISION)-0.5)))
|
|
|
|
#if defined(_WIN32) && !defined(_WIN32_WCE)
|
|
|
|
/* multiply with real shift */
|
|
static INLINE real_t MUL_R(real_t A, real_t B)
|
|
{
|
|
_asm {
|
|
mov eax,A
|
|
imul B
|
|
shrd eax,edx,REAL_BITS
|
|
}
|
|
}
|
|
|
|
/* multiply with coef shift */
|
|
static INLINE real_t MUL_C(real_t A, real_t B)
|
|
{
|
|
_asm {
|
|
mov eax,A
|
|
imul B
|
|
shrd eax,edx,COEF_BITS
|
|
}
|
|
}
|
|
|
|
static INLINE real_t MUL_Q2(real_t A, real_t B)
|
|
{
|
|
_asm {
|
|
mov eax,A
|
|
imul B
|
|
shrd eax,edx,Q2_BITS
|
|
}
|
|
}
|
|
|
|
static INLINE real_t MUL_SHIFT6(real_t A, real_t B)
|
|
{
|
|
_asm {
|
|
mov eax,A
|
|
imul B
|
|
shrd eax,edx,6
|
|
}
|
|
}
|
|
|
|
static INLINE real_t MUL_SHIFT23(real_t A, real_t B)
|
|
{
|
|
_asm {
|
|
mov eax,A
|
|
imul B
|
|
shrd eax,edx,23
|
|
}
|
|
}
|
|
|
|
#if 1
|
|
static INLINE real_t _MulHigh(real_t A, real_t B)
|
|
{
|
|
_asm {
|
|
mov eax,A
|
|
imul B
|
|
mov eax,edx
|
|
}
|
|
}
|
|
|
|
/* multiply with fractional shift */
|
|
static INLINE real_t MUL_F(real_t A, real_t B)
|
|
{
|
|
return _MulHigh(A,B) << (FRAC_SIZE-FRAC_BITS);
|
|
}
|
|
|
|
/* Complex multiplication */
|
|
static INLINE void ComplexMult(real_t *y1, real_t *y2,
|
|
real_t x1, real_t x2, real_t c1, real_t c2)
|
|
{
|
|
*y1 = (_MulHigh(x1, c1) + _MulHigh(x2, c2))<<(FRAC_SIZE-FRAC_BITS);
|
|
*y2 = (_MulHigh(x2, c1) - _MulHigh(x1, c2))<<(FRAC_SIZE-FRAC_BITS);
|
|
}
|
|
#else
|
|
static INLINE real_t MUL_F(real_t A, real_t B)
|
|
{
|
|
_asm {
|
|
mov eax,A
|
|
imul B
|
|
shrd eax,edx,FRAC_BITS
|
|
}
|
|
}
|
|
|
|
/* Complex multiplication */
|
|
static INLINE void ComplexMult(real_t *y1, real_t *y2,
|
|
real_t x1, real_t x2, real_t c1, real_t c2)
|
|
{
|
|
*y1 = MUL_F(x1, c1) + MUL_F(x2, c2);
|
|
*y2 = MUL_F(x2, c1) - MUL_F(x1, c2);
|
|
}
|
|
#endif
|
|
|
|
#elif defined(__GNUC__) && defined (__arm__)
|
|
|
|
/* taken from MAD */
|
|
#define arm_mul(x, y, SCALEBITS) \
|
|
({ \
|
|
uint32_t __hi; \
|
|
uint32_t __lo; \
|
|
uint32_t __result; \
|
|
asm("smull %0, %1, %3, %4\n\t" \
|
|
"movs %0, %0, lsr %5\n\t" \
|
|
"adc %2, %0, %1, lsl %6" \
|
|
: "=&r" (__lo), "=&r" (__hi), "=r" (__result) \
|
|
: "%r" (x), "r" (y), \
|
|
"M" (SCALEBITS), "M" (32 - (SCALEBITS)) \
|
|
: "cc"); \
|
|
__result; \
|
|
})
|
|
|
|
static INLINE real_t MUL_R(real_t A, real_t B)
|
|
{
|
|
return arm_mul(A, B, REAL_BITS);
|
|
}
|
|
|
|
static INLINE real_t MUL_C(real_t A, real_t B)
|
|
{
|
|
return arm_mul(A, B, COEF_BITS);
|
|
}
|
|
|
|
static INLINE real_t MUL_Q2(real_t A, real_t B)
|
|
{
|
|
return arm_mul(A, B, Q2_BITS);
|
|
}
|
|
|
|
static INLINE real_t MUL_SHIFT6(real_t A, real_t B)
|
|
{
|
|
return arm_mul(A, B, 6);
|
|
}
|
|
|
|
static INLINE real_t MUL_SHIFT23(real_t A, real_t B)
|
|
{
|
|
return arm_mul(A, B, 23);
|
|
}
|
|
|
|
static INLINE real_t _MulHigh(real_t x, real_t y)
|
|
{
|
|
uint32_t __lo;
|
|
uint32_t __hi;
|
|
asm("smull\t%0, %1, %2, %3"
|
|
: "=&r"(__lo),"=&r"(__hi)
|
|
: "%r"(x),"r"(y)
|
|
: "cc");
|
|
return __hi;
|
|
}
|
|
|
|
static INLINE real_t MUL_F(real_t A, real_t B)
|
|
{
|
|
return _MulHigh(A, B) << (FRAC_SIZE-FRAC_BITS);
|
|
}
|
|
|
|
/* Complex multiplication */
|
|
static INLINE void ComplexMult(real_t *y1, real_t *y2,
|
|
real_t x1, real_t x2, real_t c1, real_t c2)
|
|
{
|
|
int32_t tmp, yt1, yt2;
|
|
asm("smull %0, %1, %4, %6\n\t"
|
|
"smlal %0, %1, %5, %7\n\t"
|
|
"rsb %3, %4, #0\n\t"
|
|
"smull %0, %2, %5, %6\n\t"
|
|
"smlal %0, %2, %3, %7"
|
|
: "=&r" (tmp), "=&r" (yt1), "=&r" (yt2), "=r" (x1)
|
|
: "3" (x1), "r" (x2), "r" (c1), "r" (c2)
|
|
: "cc" );
|
|
*y1 = yt1 << (FRAC_SIZE-FRAC_BITS);
|
|
*y2 = yt2 << (FRAC_SIZE-FRAC_BITS);
|
|
}
|
|
|
|
#else
|
|
|
|
/* multiply with real shift */
|
|
#define MUL_R(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (REAL_BITS-1))) >> REAL_BITS)
|
|
/* multiply with coef shift */
|
|
#define MUL_C(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (COEF_BITS-1))) >> COEF_BITS)
|
|
/* multiply with fractional shift */
|
|
#if defined(_WIN32_WCE) && defined(_ARM_)
|
|
/* eVC for PocketPC has an intrinsic function that returns only the high 32 bits of a 32x32 bit multiply */
|
|
static INLINE real_t MUL_F(real_t A, real_t B)
|
|
{
|
|
return _MulHigh(A,B) << (32-FRAC_BITS);
|
|
}
|
|
#else
|
|
#define _MulHigh(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (FRAC_SIZE-1))) >> FRAC_SIZE)
|
|
#define MUL_F(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (FRAC_BITS-1))) >> FRAC_BITS)
|
|
#endif
|
|
#define MUL_Q2(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (Q2_BITS-1))) >> Q2_BITS)
|
|
#define MUL_SHIFT6(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (6-1))) >> 6)
|
|
#define MUL_SHIFT23(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (23-1))) >> 23)
|
|
|
|
/* Complex multiplication */
|
|
static INLINE void ComplexMult(real_t *y1, real_t *y2,
|
|
real_t x1, real_t x2, real_t c1, real_t c2)
|
|
{
|
|
*y1 = (_MulHigh(x1, c1) + _MulHigh(x2, c2))<<(FRAC_SIZE-FRAC_BITS);
|
|
*y2 = (_MulHigh(x2, c1) - _MulHigh(x1, c2))<<(FRAC_SIZE-FRAC_BITS);
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif
|