/*-----------------------------------------------
 *
 * Vector Quantization Image Compression  (C-RAM)
 *
 */

#include <cram.h>
#include "vq.h"

#define TRACING         user1

/* PEs = VECTORS  ->  16MB */

void vq(
/* image stored in vector order, 1 vector/PE  */
             const cuint image[VECTORSIZE],
             const int codebook[VECTORSIZE][ CODEBOOKSIZE],
             cuint &codedimage)
{
    int pix, code;
    cuint error(16, UNALIGNED), besterror(16, UNALIGNED);

    for (code = 0; code < CODEBOOKSIZE; code++)
    {
            if(traces[TRACING]) cRuntime("outer loop");
        error = 0;
        for (pix = 0; pix < VECTORSIZE; pix++)
        {
#ifdef RMSERROR
            /* error must be large enough to hold it */
            error += sqr(image[pix] - codebook[pix][ code]);
#else                           /* RMSERROR */
            error += abs(image[pix] - codebook[pix][ code]);
#endif                          /* RMSERROR */
        }
        if (code == 0)
        {
            besterror = error;
            codedimage = code;
        }
        else
        {
            cif(error < besterror)
                  besterror = error;
            codedimage = code;
            cend
        }
    }

}