mp4_predict.h

来自「实现在linux下的mpeg4编解码」· C头文件 代码 · 共 49 行

/**************************************************************************
 *                                                                        *
 * This code has been developed by Andrea Graziani. This software is an   *
 * implementation of a part of one or more MPEG-4 Video tools as          *
 * specified in ISO/IEC 14496-2 standard.  Those intending to use this    *
 * software module in hardware or software products are advised that its  *
 * use may infringe existing patents or copyrights, and any such use      *
 * would be at such party's own risk.  The original developer of this     *
 * software module and his/her company, and subsequent editors and their  *
 * companies (including Project Mayo), will have no liability for use of  *
 * this software or modifications or derivatives thereof.                 *
 *                                                                        *
 * Project Mayo gives users of the Codec a license to this software       *
 * module or modifications thereof for use in hardware or software        *
 * products claiming conformance to the MPEG-4 Video Standard as          *
 * described in the Open DivX license.                                    *
 *                                                                        *
 * The complete Open DivX license can be found at                         *
 * http://www.projectmayo.com/opendivx/license.php                        *
 *                                                                        *
 **************************************************************************/
/**
*  Copyright (C) 2001 - Project Mayo
 *
 * Andrea Graziani (Ag)
 *
 * DivX Advanced Research Center <[e-mail]>
*
**/
// mp4_predict.h //

#ifndef _MP4_PREDICT_H_
#define _MP4_PREDICT_H_

#define TOP 1
#define LEFT 0

#endif // _MP4_PREDICT_H_

/*** aritmetic operators ***/
#define _div_div(a, b) (a>0) ? (a+(b>>1))/b : (a-(b>>1))/b

/*** *** ***/

extern void dc_recon(int block_num, short * dc_value);
extern void ac_recon(int block_num, short * psBlock);
extern int ac_rescaling(int block_num, short * psBlock);
extern void ac_store(int block_num, short * psBlock);