aacsbrfft.c 文件参考

#include "aacsbr.h"
#include "aacassembly.h"

宏定义
#define	SQRT1_2   0x5a82799a
#define	swapcplx(p0, p1)   t = p0; t1 = *(&(p0)+1); p0 = p1; *(&(p0)+1) = *(&(p1)+1); p1 = t; *(&(p1)+1) = t1

函数
static void	BitReverse32 (int *inout)
static void	R8FirstPass32 (int *r0)
static void	R4Core32 (int *r0)
void STATNAME()	FFT32C (int *x)

变量
static const int	twidTabOdd32 [8 *6]

宏定义说明

SQRT1_2

#define SQRT1_2   0x5a82799a

swapcplx

#define swapcplx	(		p0,
			p1
	)		t = p0; t1 = *(&(p0)+1); p0 = p1; *(&(p0)+1) = *(&(p1)+1); p1 = t; *(&(p1)+1) = t1

函数说明

BitReverse32()

static void BitReverse32 ( int *  inout )

static

FFT32C()

void STATNAME() FFT32C

(

int *

x

)

R4Core32()

static void R4Core32 ( int *  r0 )

static

R8FirstPass32()

static void R8FirstPass32 ( int *  r0 )

static

变量说明

twidTabOdd32

const int twidTabOdd32[8 *6]

static

初始值:

= {
    0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x539eba45, 0xe7821d59, 
    0x4b418bbe, 0xf383a3e2, 0x58c542c5, 0xdc71898d, 0x5a82799a, 0xd2bec333, 0x539eba45, 0xe7821d59, 
    0x539eba45, 0xc4df2862, 0x539eba45, 0xc4df2862, 0x58c542c5, 0xdc71898d, 0x3248d382, 0xc13ad060, 
    0x40000000, 0xc0000000, 0x5a82799a, 0xd2bec333, 0x00000000, 0xd2bec333, 0x22a2f4f8, 0xc4df2862, 
    0x58c542c5, 0xcac933ae, 0xcdb72c7e, 0xf383a3e2, 0x00000000, 0xd2bec333, 0x539eba45, 0xc4df2862, 
    0xac6145bb, 0x187de2a7, 0xdd5d0b08, 0xe7821d59, 0x4b418bbe, 0xc13ad060, 0xa73abd3b, 0x3536cc52, 
}