test.c

TMS320VC55XX图像处理程序

#include <stdio.h>  
#include <imagelib.h>
#pragma DATA_SECTION(imageBlock,"mydata");  
#pragma DATA_SECTION(interBuffer,"mytemp");

short imageBlock[64]={ // The left-top 8*8 macro block of 128-shift 
                     //lena.raw (Q16.0 format 256*256, Gray level 0 - 255 -> -128 - 127)  
                     
     9,     9,    10,     5,    1,     3,     3,     3,
     8,     8,     5,     5,    5,     5,     2,     4,
     5,     5,     6,     5,    2,     2,     2,     2,
     8,     8,     6,     2,    2,    -6,     2,     2,
    10,    10,     8,     6,    5,     4,     4,     3,
     6,     6,     4,     5,    3,     3,     3,     3,
     6,     6,     2,     0,    4,     2,     0,     2,
     4,     4,     2,    -3,    0,     2,     2,     0  
};
short interBuffer[72];
void main()
{ 
  int i,j;
  IMG_fdct_8x8(imageBlock,interBuffer);  
  /* Theoretical results of 2-D DCT for image block Q16.0 format 
     
    32    15     6    -1    -1    -2    -1     1
     7     3    -1    -4     0     2     1    -1
    -3    -2     1     3    -3    -1     3    -1
     7     1    -1     0     0     0     1    -2
     0     4     3    -2    -2     1    -1     3
    -4     2     2    -3     1     0    -1     2
    -2    -2    -1    -2    -2     3     1    -1
     3     0    -2     1    -1     0     2    -1      
  */
  for(i=0;i<8;i++) // Convert DCT coefficients from Q16.0 to 13.3.
  for(j=0;j<8;j++) 
  imageBlock[i*8+j]=imageBlock[i*8+j]<<3;
  
  IMG_idct_8x8(imageBlock,interBuffer);
}