shapeenhdecode.cpp

来自「完整的RTP RTSP代码库」· C++ 代码 · 共 815 行 · 第 1/3 页

65537, 65537, 65537, 65537, 65537, 65537, 65537, 65537,
45333, 28672, 21363, 26870, 41125, 9455, 25752, 12372,
65537, 65537, 65537, 65537, 65537, 65537, 65537, 65537,
46324, 37071, 4994, 5136, 18879, 28687, 9330, 366,
65537, 65537, 65537, 65537, 65537, 65537, 65537, 65537,
31745, 26116, 346, 397, 2900, 13830, 361, 8
};



static UInt prob_even0[256]={
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
25542, 38525, 48333, 53517, 26541, 23214, 61559, 59853,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
7151, 31006, 33480, 29879, 2609, 4142, 16384, 11884,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
44817, 65535, 56097, 64984, 40735, 47710, 43386, 52046,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
17545, 29626, 37308, 42263, 4196, 13552, 7199, 7230,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
1, 1, 1, 39322, 13578, 17416, 29218, 31831,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
1311, 65535, 32768, 7282, 1, 3048, 25206, 19935,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
1, 32768, 17873, 61861, 3417, 14895, 4541, 5293,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
4819, 32768, 39950, 43523, 1148, 4021, 12072, 5436,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
1, 1, 134, 1, 1, 55, 5461, 2849,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
24, 5243, 590, 1079, 86, 95, 14564, 7159,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
328, 1, 2564, 14919, 21845, 1, 9362, 15880,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
43, 362, 150, 1179, 752, 529, 683, 331,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
1, 1, 700, 862, 25, 24, 1317, 558,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
1, 1, 1, 172, 2, 4, 793, 342,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
572, 1, 1928, 43080, 3337, 1680, 1401, 2131,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
18, 1, 366, 7456, 8, 18, 40, 8
};

static UInt prob_even1[256]={
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
0, 0, 0, 0, 0, 0, 0, 0,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
0, 0, 0, 0, 0, 0, 0, 0,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
0, 0, 0, 0, 0, 0, 0, 0,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
0, 0, 0, 0, 0, 0, 0, 0,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
0, 0, 0, 0, 0, 0, 0, 0,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
0, 0, 0, 0, 0, 0, 0, 0,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
0, 0, 0, 0, 0, 0, 0, 0,
65536, 65536, 65536, 65536, 65536, 65536, 65536, 65536,
0, 0, 0, 0, 0, 0, 0, 0,
65537, 65537, 65537, 65537, 65537, 65537, 65537, 65537,
54018, 8704, 1, 903, 61648, 31196, 327, 575,
65537, 65537, 65537, 65537, 65537, 65537, 65537, 65537,
64400, 36956, 1673, 9758, 52289, 4361, 659, 1433,
65537, 65537, 65537, 65537, 65537, 65537, 65537, 65537,
56482, 65535, 1, 1, 11905, 3034, 1, 1,
65537, 65537, 65537, 65537, 65537, 65537, 65537, 65537,
61103, 56650, 925, 8814, 11845, 2075, 828, 223,
65537, 65537, 65537, 65537, 65537, 65537, 65537, 65537,
4161, 1, 494, 5041, 52508, 32195, 11005, 2463,
65537, 65537, 65537, 65537, 65537, 65537, 65537, 65537,
63286, 32768, 39133, 49486, 53351, 8541, 37603, 15011,
65537, 65537, 65537, 65537, 65537, 65537, 65537, 65537,
18805, 13107, 1039, 1214, 5060, 21845, 3830, 387,
65537, 65537, 65537, 65537, 65537, 65537, 65537, 65537,
31654, 32951, 490, 1496, 2535, 11699, 328, 13
};


#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)

		ExclusiveORdecoding (bordered_lower_bab,
				     bordered_half_bab,
				     bordered_curr_bab,
				     mbsize,
					 scan_order, // SAIT_PDAM: ADDED by D.-S.Cho (Samsung AIT)