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#include <stdio.h>
#include "dct.h"
#include "bmpjpeg.h"
#include "bmp.h"
#include "jpeg.h"
#define ENCODE 0
#define DECODE 1
#define MAXROWS 1200
#define MAXCOLS 800
#define HEADER 54
unsigned char Image1[MAXCOLS*3*MAXROWS+HEADER];
unsigned char Image2[MAXCOLS*3*MAXROWS+HEADER];
DCTELEM quan_data[64] = {
8, 6, 6, 7, 6, 5, 8, 7,
7, 7, 9, 9, 8, 10, 12, 20,
13, 12, 11, 11, 12, 25, 18, 19,
15, 20, 29, 26, 31, 30, 29, 26,
28, 28, 32, 36, 46, 39, 32, 34,
44, 35, 28, 28, 40, 55, 41, 44,
48, 49, 52, 52, 52, 31, 39, 57,
61, 56, 50, 60, 46, 51, 52, 50
};
void quanize_data(int * data,int * qdata)
{
int i,j;
for (i = 0; i < 8; i++)
{
for(j=0;j < 8;j++)
{
*(data + ((i * 8) + j)) = *(data + ((i * 8) + j)) / *(qdata + ((i * 8) + j)) ;
}
}
}
void scale_data(DCTELEM * data, DCTELEM scale)
{
int i,j;
for (i = 0; i < 8; i++)
{
for(j=0;j < 8;j++)
{
*(data + ((i * 8) + j)) = *(data + ((i * 8) + j)) - scale ;
}
}
}
/*void dump_data(DCTELEM * data )
{
int i,j;
for (i = 0; i < 8; i++)
{
printf("\n");
for(j=0;j < 8;j++)
{
printf("%d\t",*(data + ((i * 8) + j)));
}
}
}
void dump_data2(unsigned char * data )
{
int i,j;
for (i = 0; i < 8; i++)
{
printf("\n");
for(j=0;j < 8;j++)
{
printf("%d\t",*(data + ((i * 8) + j)));
}
}
}
*/
int main(int argc, char *argv[]) {
int retval, i,j;
//int workspace[DCTSIZE_BLOCK];
unsigned char blok8x8_2[64];
int blok8x8[64];
unsigned char type;
unsigned int x_size, y_size, offset;
unsigned char depth;
char *fileIn, *fileOut;
FILE *fI, *fO;
/*******************************************************************************************/
/* Just for testing on the PC */
if(argc != 4)
{
printf("need more arguments, 0|1 for de/encrypt and 2 more for the in/ouput files");
return 0;
}
type = atoi(argv[1]);
fileIn = argv[2];
fileOut = argv[3];
if (NULL == (fI = fopen(fileIn, "rb"))){
printf("unable to open the file to read from (%s)",fileIn);
return 0;
}
if ((fO = fopen(fileOut,"wb")) == NULL) {
printf("unable to open the file to write (%s)",fileOut);
return 0;
}
/* Read the max possible size to the memory */
fread(Image1, sizeof(unsigned char), (MAXROWS*MAXCOLS*3+HEADER), fI);
/*******************************************************************************************/
/* The image must be in the memory by now */
// retval = 0;
GetBMPHeaderInfo (Image1,&offset,&x_size,&y_size,&depth);
/*printf("Before:");
for(i=0;i<(x_size*y_size*3+offset);i++)
{
if((i%24)==0) printf("\n");
printf("%02x ",Image1[i]);
}
*/
switch(type) {
case ENCODE:
// GetBMPHeaderInfo (Image1,&offset,&x_size,&y_size,&depth);
printf("Image Resolution: %d x %d x %i Offset: %i\n", x_size, y_size, depth, offset);
for(i=0;i<x_size;i+=8)
{
for(j=0;j<y_size;j+=8)
{
//printf("\nImage Resolution: %i %i\n", i,j);
// RGB -> YUV & Convert to 8x8 --> done
BMPto8x8AndYCbCr(i,j,x_size,y_size,offset,depth,Image1,blok8x8);
// DCT
// Basic data
//dump_data(blok8x8);
// Scaling -128
scale_data(blok8x8,128);
//printf("\nscaled -128\n");
// After scale
//dump_data(blok8x8);
//printf("\nafter DCT\n");
jpeg_fdct_ifast(blok8x8);
// After dct
//dump_data(blok8x8);
quanize_data(blok8x8,quan_data);
//printf("\nafter quantize\n");
//dump_data(blok8x8);
IDCT(blok8x8, blok8x8_2);
//printf("\nafter idct\n");
//dump_data2(blok8x8_2);
//printf("\n\n");
YCbCrAnd8x8toBMP(i,j,x_size,y_size,offset,depth,Image2,blok8x8_2);
}
}
break;
case DECODE:
GetJPEGHeaderInfo (Image1,&offset,&x_size,&y_size,&depth);
for(i=0;i<x_size;i+=8)
{
for(j=0;j<y_size;j+=8)
{
// VLD (huffman)
// IQ
// ZZ
// IDCT
//idct(workspace);
// YUV -> RGB & Convert 8x8 to BMP style &
YCbCrAnd8x8toBMP(i,j,x_size,y_size,offset,depth,Image2,blok8x8_2);
}
}
WriteBMPHeaderInfo(Image2,offset,x_size,y_size, depth);
break;
}
WriteBMPHeaderInfo(Image2,offset,x_size,y_size, depth);
//Write Image to the output file.
fwrite(Image2, sizeof(unsigned char), (x_size*y_size*(depth/8))+offset, fO);
fclose(fI);
fclose(fO);
return retval;
}
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