pp.h

mediastreamer2是开源的网络传输媒体流的库

/********************************************************************
 *                                                                  *
 * THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE.   *
 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
 *                                                                  *
 * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2003                *
 * by the Xiph.Org Foundation http://www.xiph.org/                  *
 *                                                                  *
 ********************************************************************

  function:
  last mod: $Id: pp.h 11442 2006-05-27 17:28:08Z giles $

 ********************************************************************/

/* Constants. */
#define INTERNAL_BLOCK_HEIGHT   8
#define INTERNAL_BLOCK_WIDTH    8


/* NEW Line search values. */
#define UP      0
#define DOWN    1
#define LEFT    2
#define RIGHT   3

#define FIRST_ROW           0
#define NOT_EDGE_ROW        1
#define LAST_ROW            2

#define YDIFF_CB_ROWS                   (INTERNAL_BLOCK_HEIGHT * 3)
#define CHLOCALS_CB_ROWS                (INTERNAL_BLOCK_HEIGHT * 3)
#define PMAP_CB_ROWS                    (INTERNAL_BLOCK_HEIGHT * 3)
#define PSCORE_CB_ROWS                  (INTERNAL_BLOCK_HEIGHT * 4)

/* Status values in block coding map */
#define CANDIDATE_BLOCK_LOW                     -2
#define CANDIDATE_BLOCK                         -1
#define BLOCK_NOT_CODED                         0
#define BLOCK_CODED_BAR                         3
#define BLOCK_CODED_SGC                         4
#define BLOCK_CODED_LOW                         4
#define BLOCK_CODED                             5

#define MAX_PREV_FRAMES             16
#define MAX_SEARCH_LINE_LEN                     7