mirror of
https://github.com/mpv-player/mpv
synced 2024-12-16 03:45:23 +00:00
e24087509a
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@10990 b3059339-0415-0410-9bf9-f77b7e298cf2
146 lines
3.6 KiB
C
146 lines
3.6 KiB
C
/*
|
|
** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
|
|
** Copyright (C) 2003 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 1.1 2003/08/30 22:30:21 arpi Exp $
|
|
**/
|
|
|
|
#ifndef __FIXED_H__
|
|
#define __FIXED_H__
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#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)
|
|
|
|
|
|
typedef int32_t real_t;
|
|
|
|
|
|
#define REAL_CONST(A) ((real_t)((A)*(REAL_PRECISION)))
|
|
#define COEF_CONST(A) ((real_t)((A)*(COEF_PRECISION)))
|
|
|
|
#if defined(_WIN32) && !defined(_WIN32_WCE)
|
|
|
|
/* multiply real with real */
|
|
static INLINE MUL(real_t A, real_t B)
|
|
{
|
|
_asm {
|
|
mov eax,A
|
|
imul B
|
|
#if 0
|
|
shrd eax,edx,REAL_BITS
|
|
#else
|
|
shr eax,REAL_BITS
|
|
shl edx,(32-REAL_BITS)
|
|
or eax,edx
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/* multiply coef with coef */
|
|
static INLINE MUL_C_C(real_t A, real_t B)
|
|
{
|
|
_asm {
|
|
mov eax,A
|
|
imul B
|
|
#if 0
|
|
shrd eax,edx,COEF_BITS
|
|
#else
|
|
shr eax,COEF_BITS
|
|
shl edx,(32-COEF_BITS)
|
|
or eax,edx
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/* multiply real with coef */
|
|
static INLINE MUL_R_C(real_t A, real_t B)
|
|
{
|
|
_asm {
|
|
mov eax,A
|
|
imul B
|
|
#if 0
|
|
shrd eax,edx,COEF_BITS
|
|
#else
|
|
shr eax,COEF_BITS
|
|
shl edx,(32-COEF_BITS)
|
|
or eax,edx
|
|
#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(real_t A, real_t B)
|
|
{
|
|
return arm_mul( A, B, REAL_BITS);
|
|
}
|
|
|
|
static INLINE real_t MUL_C_C(real_t A, real_t B)
|
|
{
|
|
return arm_mul( A, B, COEF_BITS);
|
|
}
|
|
|
|
static INLINE real_t MUL_R_C(real_t A, real_t B)
|
|
{
|
|
return arm_mul( A, B, COEF_BITS);
|
|
}
|
|
|
|
#else
|
|
|
|
/* multiply real with real */
|
|
#define MUL(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (REAL_BITS-1))) >> REAL_BITS)
|
|
/* multiply coef with coef */
|
|
#define MUL_C_C(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (COEF_BITS-1))) >> COEF_BITS)
|
|
/* multiply real with coef */
|
|
#define MUL_R_C(A,B) (real_t)(((int64_t)(A)*(int64_t)(B)+(1 << (COEF_BITS-1))) >> COEF_BITS)
|
|
|
|
#endif
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif
|