sad.h

这是一个压缩解压包,用C语言进行编程的,里面有详细的源代码.

/*****************************************************************************
 *
 *  XVID MPEG-4 VIDEO CODEC
 *  - Sum Of Absolute Difference header  -
 *
 *  Copyright(C) 2001-2003 Peter Ross <[e-mail]>
 *
 *  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
 *
 * $Id: sad.h,v 1.22 2005/01/05 23:02:15 edgomez Exp $
 *
 ****************************************************************************/

#ifndef _ENCODER_SAD_H_
#define _ENCODER_SAD_H_

#include "../portab.h"

typedef void (sadInitFunc) (void);
typedef sadInitFunc *sadInitFuncPtr;

extern sadInitFuncPtr sadInit;
sadInitFunc sadInit_altivec;

typedef uint32_t(sad16Func) (const uint8_t * const cur,
							 const uint8_t * const ref,
							 const uint32_t stride,
							 const uint32_t best_sad);
typedef sad16Func *sad16FuncPtr;
extern sad16FuncPtr sad16;
sad16Func sad16_c;

#ifdef ARCH_IS_IA32
sad16Func sad16_mmx;
sad16Func sad16_xmm;
sad16Func sad16_3dne;
sad16Func sad16_sse2;
#endif

#ifdef ARCH_IS_IA64
sad16Func sad16_ia64;
#endif

#ifdef ARCH_IS_PPC
sad16Func sad16_altivec_c;
#endif

#ifdef ARCH_IS_X86_64
sad16Func sad16_x86_64;
#endif

sad16Func mrsad16_c;

typedef uint32_t(sad8Func) (const uint8_t * const cur,
							const uint8_t * const ref,
							const uint32_t stride);
typedef sad8Func *sad8FuncPtr;
extern sad8FuncPtr sad8;
sad8Func sad8_c;

#ifdef ARCH_IS_IA32
sad8Func sad8_mmx;
sad8Func sad8_xmm;
sad8Func sad8_3dne;
#endif

#ifdef ARCH_IS_IA64
sad8Func sad8_ia64;
#endif

#ifdef ARCH_IS_PPC
sad8Func sad8_altivec_c;
#endif

#ifdef ARCH_IS_X86_64
sad8Func sad8_x86_64;
#endif

typedef uint32_t(sad16biFunc) (const uint8_t * const cur,
							   const uint8_t * const ref1,
							   const uint8_t * const ref2,
							   const uint32_t stride);
typedef sad16biFunc *sad16biFuncPtr;
extern sad16biFuncPtr sad16bi;
sad16biFunc sad16bi_c;

#ifdef ARCH_IS_IA32
sad16biFunc sad16bi_mmx;
sad16biFunc sad16bi_xmm;
sad16biFunc sad16bi_3dne;
sad16biFunc sad16bi_3dn;
#endif

#ifdef ARCH_IS_IA64
sad16biFunc sad16bi_ia64;
#endif

#ifdef ARCH_IS_PPC
sad16biFunc sad16bi_altivec_c;
#endif

#ifdef ARCH_IS_X86_64
sad16biFunc sad16bi_x86_64;
#endif

typedef uint32_t(sad8biFunc) (const uint8_t * const cur,
							   const uint8_t * const ref1,
							   const uint8_t * const ref2,
							   const uint32_t stride);
typedef sad8biFunc *sad8biFuncPtr;
extern sad8biFuncPtr sad8bi;
sad8biFunc sad8bi_c;

#ifdef ARCH_IS_IA32
sad8biFunc sad8bi_mmx;
sad8biFunc sad8bi_xmm;
sad8biFunc sad8bi_3dne;
sad8biFunc sad8bi_3dn;
#endif

#ifdef ARCH_IS_X86_64
sad8biFunc sad8bi_x86_64;
#endif

typedef uint32_t(dev16Func) (const uint8_t * const cur,
							 const uint32_t stride);
typedef dev16Func *dev16FuncPtr;
extern dev16FuncPtr dev16;
dev16Func dev16_c;

typedef uint32_t (sad16vFunc)(	const uint8_t * const cur,
								const uint8_t * const ref,
								const uint32_t stride, int32_t *sad8);
typedef sad16vFunc *sad16vFuncPtr;
extern sad16vFuncPtr sad16v;

sad16vFunc sad16v_c;
sad16vFunc sad32v_c;

#ifdef ARCH_IS_IA32
dev16Func dev16_mmx;
dev16Func dev16_xmm;
dev16Func dev16_3dne;
dev16Func dev16_sse2;
sad16vFunc sad16v_xmm;
sad16vFunc sad16v_mmx;
#endif

#ifdef ARCH_IS_IA64
dev16Func dev16_ia64;
#endif

#ifdef ARCH_IS_PPC
dev16Func dev16_altivec_c;
#endif

#ifdef ARCH_IS_X86_64
dev16Func dev16_x86_64;
sad16vFunc sad16v_x86_64;
#endif

/* This function assumes blocks use 16bit signed elements */
typedef uint32_t (sse8Func_16bit)(const int16_t * cur,
								  const int16_t * ref,
								  const uint32_t stride);
typedef sse8Func_16bit *sse8Func_16bitPtr;
extern sse8Func_16bitPtr sse8_16bit;

sse8Func_16bit sse8_16bit_c;
#ifdef ARCH_IS_IA32
sse8Func_16bit sse8_16bit_mmx;
#endif

#ifdef ARCH_IS_PPC
sse8Func_16bit sse8_16bit_altivec_c;
#endif

#ifdef ARCH_IS_X86_64
sse8Func_16bit sse8_16bit_x86_64;
#endif

/* This function assumes blocks use 8bit *un*signed elements */
typedef uint32_t (sse8Func_8bit)(const uint8_t * cur,
								 const uint8_t * ref,
								 const uint32_t stride);
typedef sse8Func_8bit *sse8Func_8bitPtr;
extern sse8Func_8bitPtr sse8_8bit;

sse8Func_8bit sse8_8bit_c;

#ifdef ARCH_IS_IA32
sse8Func_8bit sse8_8bit_mmx;
#endif

#ifdef ARCH_IS_X86_64
sse8Func_8bit sse8_8bit_x86_64;
#endif

#endif							/* _ENCODER_SAD_H_ */