📄 shapeenhdecode.cpp
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/****************************************************************************/
/* MPEG4 Visual Texture Coding (VTC) Mode Software */
/* */
/* This software was jointly developed by the following participants: */
/* */
/* Single-quant, multi-quant and flow control */
/* are provided by Sarnoff Corporation */
/* Iraj Sodagar (iraj@sarnoff.com) */
/* Hung-Ju Lee (hjlee@sarnoff.com) */
/* Paul Hatrack (hatrack@sarnoff.com) */
/* Shipeng Li (shipeng@sarnoff.com) */
/* Bing-Bing Chai (bchai@sarnoff.com) */
/* B.S. Srinivas (bsrinivas@sarnoff.com) */
/* */
/* Bi-level is provided by Texas Instruments */
/* Jie Liang (liang@ti.com) */
/* */
/* Shape Coding is provided by OKI Electric Industry Co., Ltd. */
/* Zhixiong Wu (sgo@hlabs.oki.co.jp) */
/* Yoshihiro Ueda (yueda@hlabs.oki.co.jp) */
/* Toshifumi Kanamaru (kanamaru@hlabs.oki.co.jp) */
/* */
/* OKI, Sharp, Sarnoff, TI and Microsoft contributed to bitstream */
/* exchange and bug fixing. */
/* */
/* Scalable Shape Coding was provided by: */
/* Shipeng Li (Sarnoff Corporation), */
/* Dae-Sung Cho (Samsung AIT), */
/* Se Hoon Son (Samsung AIT) */
/* In the course of development of the MPEG-4 standard, this software */
/* module is an implementation of a part of one or more MPEG-4 tools as */
/* specified by the MPEG-4 standard. */
/* */
/* The copyright of this software belongs to ISO/IEC. ISO/IEC gives use */
/* of the MPEG-4 standard free license to use this software module or */
/* modifications thereof for hardware or software products claiming */
/* conformance to the MPEG-4 standard. */
/* */
/* Those intending to use this software module in hardware or software */
/* products are advised that use may infringe existing patents. The */
/* original developers of this software module and their companies, the */
/* subsequent editors and their companies, and ISO/IEC have no liability */
/* and ISO/IEC have no liability for use of this software module or */
/* modification thereof in an implementation. */
/* */
/* Permission is granted to MPEG members to use, copy, modify, */
/* and distribute the software modules ( or portions thereof ) */
/* for standardization activity within ISO/IEC JTC1/SC29/WG11. */
/* */
/* Copyright 1995, 1996, 1997, 1998 ISO/IEC */
/****************************************************************************/
/*****************************************************************************
"This software module was originally developed by:
Dae-Sung Cho (Samsung AIT),
Se Hoon Son (Samsung AIT)
and edited by:
Dae-Sung Cho (Samsung AIT)
in the course of development of the <MPEG-4 Video(ISO/IEC 14496-2)>. This
software module is an implementation of a part of one or more <MPEG-4 Video
(ISO/IEC 14496-2)> tools as specified by the <MPEG-4 Video(ISO/IEC 14496-2)
>. ISO/IEC gives users of the <MPEG-4 Video(ISO/IEC 14496-2)> free license
to this software module or modifications thereof for use in hardware or
software products claiming conformance to the <MPEG-4 Video(ISO/IEC 14496-2
)>. Those intending to use this software module in hardware or software
products are advised that its use may infringe existing patents. The
original developer of this software module and his/her company, the
subsequent editors and their companies, and ISO/IEC have no liability for
use of this software module or modifications thereof in an implementation.
Copyright is not released for non <MPEG-4 Video(ISO/IEC 14496-2)>
conforming products. Samsung AIT (SAIT) retains full right to use the code
for his/her own purpose, assign or donate the code to a third party and to
inhibit third parties from using the code for non <MPEG-4 Video(ISO/IEC
14496-2)> conforming products. This copyright notice must be included in
all copies or derivative works. Copyright (c)1997, 1998".
*****************************************************************************/
#include <stdio.h>
#include <math.h>
#include <malloc.h>
#include "basic.hpp"
#include "dataStruct.hpp"
//#include "ShapeBaseCommon.h"
//#include "BinArCodec.h"
//#include "dwt.h"
#include "ShapeEnhDef.hpp"
//#include "ShapeEnhCommon.h"
//#include "ShapeEnhDecode.h"
#define Error -1
/***********************************************************HeaderBegin*******
*
* File: sisc_decode.c
*
* Author: Samsung AIT (SAIT)
* Created: 23-Apr-98
*
* Description: Scalable shape coder using scan interleaving (sisc fac version)
*
* Copyright (C) 1996 Samsung AIT All Rights Reserved.
*
***********************************************************HeaderEnd*********/
Int CVTCDecoder::
ShapeEnhDeCoding(UChar *LowShape, /* in: shape mask in the lower layer */
UChar *HalfShape, /* out: shape mask in the current layer */
UChar *CurShape, /* out: shape mask in the current layer */
Int object_width,
Int object_height,
FILTER *filter)
{
Int i, j, k, l, p, q, x, y, x2, y2;
Int bab_type, ret;
Int width2 = object_width,
height2 = object_height,
width = width2 >> 1,
height = height2 >> 1;
Int NB = (object_width >= 1024 || object_height >=1024)? 6:
(object_width >=512|| object_height >=512)?5:4;
Int mborder = MBORDER,
mblks = NB,
mbsize = 1<<mblks, /* bab size in the current layer : 16 */
mbsize_ext = mbsize+(mborder<<1); /* bordered bab size in the current layer: 20 */
Int border = BORDER,
blks = mblks-1,
bsize = 1<<blks, /* bab size in the lower layer : 8 */
bsize_ext = bsize+(border<<1); /* bordered bab size in the lower layer: 8 */
Int blkx = (object_width+mbsize-1)/mbsize,
blky = (object_height+mbsize-1)/mbsize;
UInt prob;
UChar *lower_bab; /* alpha block in the lower layer */
UChar *bordered_lower_bab; /* bordered alpha block in the lower layer */
UChar *half_bab; /* alpha mb in the current layer */
UChar *bordered_half_bab; /* bordered alpha mb in the current layer */
UChar *curr_bab; /* alpha mb in the current layer */
UChar *bordered_curr_bab; /* bordered alpha mb in the current layer */
ArDecoder ar_decoder;
/*-- Memory allocation ---------------------------------------------------------*/
lower_bab = (UChar *) calloc(bsize*bsize, sizeof(UChar));
bordered_lower_bab = (UChar *) calloc(bsize_ext*bsize_ext, sizeof(UChar));
half_bab = (UChar *) calloc(mbsize*bsize, sizeof(UChar));
bordered_half_bab = (UChar *) calloc(mbsize_ext*bsize_ext, sizeof(UChar));
curr_bab = (UChar *) calloc(mbsize*mbsize, sizeof(UChar));
bordered_curr_bab = (UChar *) calloc(mbsize_ext*mbsize_ext, sizeof(UChar));
/*-- Decode the Enhancement Layer ------------------------------------------------*/
StartArDecoder_Still(&ar_decoder);
for ( j=y=y2=0; j<blky; j++, y+=bsize, y2+=mbsize )
{
for ( i=x=x2=0; i<blkx; i++, x+=bsize, x2+=mbsize )
{
/*-- Initialize BABs --*/
q = y*width;
for ( l=p=0; l<bsize; l++, q+=width )
{
for ( k=0; k<bsize; k++, p++ )
{
if( y+l < height && x+k < width )
lower_bab[p] = (LowShape[ q+x+k ] != 0);
else
lower_bab[p] = 0;
}
}
q = y2*width;
for ( l=p=0; l<mbsize; l++, q+=width )
for ( k=0; k<bsize; k++, p++ )
half_bab[p]=0;
q = y2*width2;
for ( l=p=0; l<mbsize; l++, q+=width2 )
for ( k=0; k<mbsize; k++, p++ )
curr_bab[p]=0;
/*-- Get BAB coding mode -- */
if(filter->DWT_Class==DWT_ODD_SYMMETRIC){
prob=scalable_bab_type_prob[0];
} else if(filter->DWT_Class==DWT_EVEN_SYMMETRIC) {
prob=scalable_bab_type_prob[1];
} else {
fprintf(stderr,"Error: filter type in ShapeEnhHeaderDecode()!\n");
exit(0);
}
bab_type = ArDecodeSymbol_Still(&ar_decoder, prob);
/* Add surrounding pixels for Modified SISC. */
AddBorderToBABs(LowShape, HalfShape, CurShape,
lower_bab, half_bab, curr_bab,
bordered_lower_bab, bordered_half_bab,
bordered_curr_bab,
object_width, object_height,
i, j, mbsize, blkx);
/* Decode mask pixel values in the current layer */
ret = ShapeEnhContentDecode(bordered_lower_bab,
bordered_half_bab,
bordered_curr_bab,
bab_type,
mbsize,
filter,
&ar_decoder);
if (ret == Error)
{
fprintf(stderr,"\n SI arithmetic coding Error !\n");
return Error;
}
q = mborder*mbsize_ext;
for ( l=p=0; l<mbsize; l++, q+=mbsize_ext )
for ( k=0; k<mbsize; k++, p++ )
curr_bab[p]=bordered_curr_bab[q+k+mborder];
q = mborder*bsize_ext;
for ( l=p=0; l<mbsize; l++, q+=bsize_ext )
for ( k=0; k<bsize; k++, p++ )
half_bab[p]=bordered_half_bab[q+k+border];
/*-- Put BABs to HalfShape--*/
q = y2*width;
for ( l=p=0; l<mbsize; l++, q+=width )
for ( k=0; k<bsize; k++, p++ )
if( y2+l < height2 && x+k < width )
HalfShape[ q+x+k ] = half_bab[p];
/*-- Put BABs to CurShape--*/
q = y2*width2;
for ( l=p=0; l<mbsize; l++, q+=width2 )
for ( k=0; k<mbsize; k++, p++ )
if( y2+l < height2 && x2+k < width2 )
CurShape[ q+x2+k ] = curr_bab[p];
}
}
StopArDecoder_Still (&ar_decoder);
/*-- Memory free ---------------------------------------------------------*/
free(lower_bab);
free(bordered_lower_bab);
free(half_bab);
free(bordered_half_bab);
free(curr_bab);
free(bordered_curr_bab);
return ( 0 );
}
/* Modified by shson */
Int CVTCDecoder::
ShapeEnhContentDecode(UChar *bordered_lower_bab,
UChar *bordered_half_bab,
UChar *bordered_curr_bab,
Int bab_type,
Int mbsize,
FILTER *filter,
ArDecoder *ar_decoder)
{
if (bab_type==0) /* Interleaved Scan-Line (ISL) coding */
{
Int scan_order = DecideScanOrder(bordered_lower_bab,mbsize); // SAIT_PDAM: ADDED by D.-S.Cho (Samsung AIT)
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