H.264/AVC Reference Software Decoder: transform8x8.c Source File

00001 
00019 #include "global.h"
00020 
00021 #include "image.h"
00022 #include "mb_access.h"
00023 #include "elements.h"
00024 #include "transform8x8.h"
00025 #include "transform.h"
00026 #include "quant.h"
00027 
00028 
00029 
00036 void itrans8x8(ImageParameters *img, 
00037                Macroblock *currMB,   
00038                ColorPlane pl,        
00039                int ioff,             
00040                int joff)             
00041 {
00042   int i,j;
00043 
00044   imgpel **mpr    = img->mb_pred[pl];
00045   imgpel **mb_rec = img->mb_rec[pl];
00046   int    **m7     = img->mb_rres[pl];
00047   int     max_imgpel_value = img->max_imgpel_value_comp[pl];
00048 
00049   if (currMB->is_lossless == TRUE)
00050   {
00051     for( j = joff; j < joff + 8; j++)
00052     {
00053       for( i = ioff; i < ioff + 8; i++)
00054         mb_rec[j][i] = (imgpel) iClip1(max_imgpel_value, (m7[j][i] + (long)mpr[j][i])); 
00055     }
00056   }
00057   else
00058   {
00059     inverse8x8(m7, m7, joff, ioff);
00060     for( j = joff; j < joff + 8; j++)
00061     {
00062       for( i = ioff; i < ioff + 8; i++)
00063         mb_rec[j][i] = (imgpel) iClip1(max_imgpel_value, rshift_rnd_sf((m7[j][i] + ((long)mpr[j][i] << DQ_BITS_8)), DQ_BITS_8)); 
00064     }
00065   }
00066 }