mbprediction.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
 *  - Prediction header -
 *
 *  Copyright(C) 2002-2003 xvid team <[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: mbprediction.h,v 1.25 2005/09/13 12:12:15 suxen_drol Exp $
 *
 ****************************************************************************/


#ifndef _MBPREDICTION_H_
#define _MBPREDICTION_H_

#include "../portab.h"
#include "../decoder.h"
#include "../global.h"

#define MIN(X, Y) ((X)<(Y)?(X):(Y))
#define MAX(X, Y) ((X)>(Y)?(X):(Y))

/* very large value */
#define MV_MAX_ERROR	(4096 * 256)

#define MVequal(A,B) ( ((A).x)==((B).x) && ((A).y)==((B).y) )

void MBPrediction(FRAMEINFO * frame,	/* <-- The parameter for ACDC and MV prediction */
				uint32_t x_pos,	/* <-- The x position of the MB to be searched	*/
				uint32_t y_pos,	/* <-- The y position of the MB to be searched	*/
				uint32_t x_dim,	/* <-- Number of macroblocks in a row		*/
				int16_t * qcoeff);	/* <-> The quantized DCT coefficients	*/

void add_acdc(MACROBLOCK * pMB,
			uint32_t block,
			int16_t dct_codes[64],
			uint32_t iDcScaler,
			int16_t predictors[8],
			const int bsversion);

void predict_acdc(MACROBLOCK * pMBs,
				uint32_t x,
				uint32_t y,
				uint32_t mb_width,
				uint32_t block,
				int16_t qcoeff[64],
				uint32_t current_quant,
				int32_t iDcScaler,
				int16_t predictors[8],
				const int bound);

VECTOR
get_pmv2(const MACROBLOCK * const mbs,
		const int mb_width,
		const int bound,
		const int x,
		const int y,
		const int block);

VECTOR
get_pmv2_interlaced(const MACROBLOCK * const mbs,
		const int mb_width,
		const int bound,
		const int x,
		const int y,
		const int block);

VECTOR
get_qpmv2(const MACROBLOCK * const mbs,
		const int mb_width,
		const int bound,
		const int x,
		const int y,
		const int block);

#endif							/* _MBPREDICTION_H_ */