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/******************************************************************************
** File Name: sin_cos.h *
** Author: shan.he *
** DATE: 2010-11-22 *
** Copyright: 2010 Spreadtrum, Incoporated. All Rights Reserved. *
** Description: *
** Note: *
*****************************************************************************/
/******************************************************************************
** Edit History *
**---------------------------------------------------------------------------*
** DATE NAME DESCRIPTION *
*****************************************************************************/
#ifndef _SIN_COS_H_
#define _SIN_COS_H_
/**---------------------------------------------------------------------------*
** Dependencies *
**---------------------------------------------------------------------------*/
//#include "sci_types.h"
#include <linux/types.h>
/**---------------------------------------------------------------------------*
** Macros *
**---------------------------------------------------------------------------*/
#define COSSIN_Q 30
#define pi 3.14159265359
#define PI_32 0x3243F6A88 //pi * (1 << 32)
#define ARC_32_COEF 0x80000000
//convert arc of double type to int32 type
#define ARC_32(arc) (int32_t)((arc) / (pi) * 2147483648);
/**---------------------------------------------------------------------------*
** Compiler Flag *
**---------------------------------------------------------------------------*/
#ifdef __cplusplus
extern "C"
{
#endif
/**---------------------------------------------------------------------------*
** Public Functions *
**---------------------------------------------------------------------------*/
/****************************************************************************/
/* Purpose: get the sin value of an arc at Q32 */
/* Author: */
/* Input: arc at Q32 */
/* Output: none */
/* Return: sin value at Q30 */
/* Note: arc at Q32 = arc * (2 ^ 32) */
/* value at Q30 = value * (2 ^ 30) */
/****************************************************************************/
int32_t dcam_sin_32(int32_t n);
/****************************************************************************/
/* Purpose: get the cos value of an arc at Q32 */
/* Author: */
/* Input: arc at Q32 */
/* Output: none */
/* Return: cos value at Q30 */
/* Note: arc at Q32 = arc * (2 ^ 32) */
/* value at Q30 = value * (2 ^ 30) */
/****************************************************************************/
int32_t dcam_cos_32(int32_t n);
/**---------------------------------------------------------------------------*
** Compiler Flag *
**---------------------------------------------------------------------------*/
#ifdef __cplusplus
}
#endif
#endif
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