bmpjpeg.c -> bmp to jpeg in 8x8 and YCrCb and jpeg 8x8 YCrCb to bmp

color.c -> RGB to YCrCb and YCrCb to RGB

2 files changed, 173 insertions, 0 deletions

diff --git a/src/bmpjpeg.c b/src/bmpjpeg.c
new file mode 100644
index 0000000..3d76e70
--- /dev/null
+++ b/src/bmpjpeg.c
@@ -0,0 +1,142 @@
+#include "color.h"

+

+void BMPto8x8AndYCbCr(int Start_x, int Start_y, int ImageSize_x, int ImageSize_y, int offset, unsigned char depth ,unsigned char *Image, unsigned char *blok8x8)

+{

+	unsigned char i;

+	int x,y,Start_point;

+	depth = depth/8;

+	Start_point = offset + (ImageSize_x*(ImageSize_y-1)+Start_x-(Start_y*ImageSize_x))*depth;

+	for(i=0;i<(64*depth);i+=depth)

+	{

+			if((i%8)==0) printf("\n");

+			if((Start_y+(i/(8*depth))) < ImageSize_y)

+			{

+				if((Start_x+((i%(8*depth))/depth)) < ImageSize_x)

+				{

+					if(depth == 3)

+					{

+						RGB2YCbCr(Image[Start_point+(i%(8*depth))  -(i/(8*depth))*(ImageSize_x*depth)],

+									Image[Start_point+(i%(8*depth))+1-(i/(8*depth))*(ImageSize_x*depth)],

+										Image[Start_point+(i%(8*depth))+2-(i/(8*depth))*(ImageSize_x*depth)],

+										&blok8x8[i],&blok8x8[i+1],&blok8x8[i+2]);

+

+						printf("%02x%02x%02x|",blok8x8[i+0],blok8x8[i+1],blok8x8[i+2]);

+					}

+					if(depth == 1)

+					{

+						blok8x8[i+0] = Image[Start_point+(i%(8*depth))-(i/(8*depth))*(ImageSize_x*depth)];

+						printf("%02x ",blok8x8[i]);

+					}

+				}

+			}

+			else

+				i = (64*depth);

+	}

+}

+

+void YCbCrAnd8x8toBMP(int Start_x, int Start_y, int ImageSize_x, int ImageSize_y, int offset, unsigned char depth ,unsigned char *Image, unsigned char *blok8x8)

+{

+	unsigned char i;

+	int x,y,Start_point;

+	depth = depth/8;

+	Start_point = offset + (ImageSize_x*(ImageSize_y-1)+Start_x-(Start_y*ImageSize_x))*depth;

+	for(i=0;i<(64*depth);i+=depth)

+	{

+			if((i%8)==0) printf("\n");

+			if((Start_y+(i/(8*depth))) < ImageSize_y)

+			{

+				if((Start_x+((i%(8*depth))/depth)) < ImageSize_x)

+				{

+					if(depth == 3)

+					{

+						YCbCr2RGB(blok8x8[i+0],blok8x8[i+1],blok8x8[i+2],

+									&Image[Start_point+(i%(8*depth))  -(i/(8*depth))*(ImageSize_x*depth)],

+										&Image[Start_point+(i%(8*depth))+1-(i/(8*depth))*(ImageSize_x*depth)],

+										&Image[Start_point+(i%(8*depth))+2-(i/(8*depth))*(ImageSize_x*depth)]);

+

+						printf("%02x%02x%02x|",blok8x8[i+0],blok8x8[i+1],blok8x8[i+2]);

+					}

+					if(depth == 1)

+					{

+						Image[Start_point+(i%(8*depth))-(i/(8*depth))*(ImageSize_x*depth)] = blok8x8[i+0];

+						printf("%02x ",blok8x8[i]);

+					}

+				}

+			}

+			else

+				i = (64*depth);

+	}

+

+}

+

+/*****************************

+The code without the RGB - > YUV

+******************************

+

+void BMPto8x8(int Start_x, int Start_y, int ImageSize_x, int ImageSize_y, int offset, unsigned char depth ,unsigned char *Image, unsigned char *blok8x8)

+{

+	unsigned char i;

+	int x,y,Start_point;

+	depth = depth/8;

+	Start_point = offset + (ImageSize_x*(ImageSize_y-1)+Start_x-(Start_y*ImageSize_x))*depth;

+	for(i=0;i<(64*depth);i+=depth)

+	{

+			if((i%8)==0) printf("\n");

+			if((Start_y+(i/(8*depth))) < ImageSize_y)

+			{

+				if((Start_x+((i%(8*depth))/depth)) < ImageSize_x)

+				{

+					if(depth == 3)

+					{

+						blok8x8[i+2] = Image[Start_point+(i%(8*depth))  -(i/(8*depth))*(ImageSize_x*depth)]; //R

+						blok8x8[i+1] = Image[Start_point+(i%(8*depth))+1-(i/(8*depth))*(ImageSize_x*depth)]; //G

+						blok8x8[i+0] = Image[Start_point+(i%(8*depth))+2-(i/(8*depth))*(ImageSize_x*depth)]; //B

+						printf("%02x%02x%02x|",blok8x8[i+0],blok8x8[i+1],blok8x8[i+2]);

+					}

+					if(depth == 1)

+					{

+						blok8x8[i+0] = Image[Start_point+(i%(8*depth))-(i/(8*depth))*(ImageSize_x*depth)];

+						printf("%02x ",blok8x8[i]);

+					}

+				}

+			}

+			else

+				i = (64*depth);

+	}

+}

+

+void B8x8toBMP(int Start_x, int Start_y, int ImageSize_x, int ImageSize_y, int offset, unsigned char depth ,unsigned char *Image, unsigned char *blok8x8)

+{

+	unsigned char i;

+	int x,y,Start_point;

+	depth = depth/8;

+	Start_point = offset + (ImageSize_x*(ImageSize_y-1)+Start_x-(Start_y*ImageSize_x))*depth;

+	for(i=0;i<(64*depth);i+=depth)

+	{

+			if((i%8)==0) printf("\n");

+			if((Start_y+(i/(8*depth))) < ImageSize_y)

+			{

+				if((Start_x+((i%(8*depth))/depth)) < ImageSize_x)

+				{

+					if(depth == 3)

+					{

+						Image[Start_point+(i%(8*depth))  -(i/(8*depth))*(ImageSize_x*depth)] = blok8x8[i+2]; //R

+						Image[Start_point+(i%(8*depth))+1-(i/(8*depth))*(ImageSize_x*depth)] = blok8x8[i+1]; //G

+						Image[Start_point+(i%(8*depth))+2-(i/(8*depth))*(ImageSize_x*depth)] = blok8x8[i+0]; //B

+						printf("%02x%02x%02x|",blok8x8[i+0],blok8x8[i+1],blok8x8[i+2]);

+					}

+					if(depth == 1)

+					{

+						Image[Start_point+(i%(8*depth))-(i/(8*depth))*(ImageSize_x*depth)] = blok8x8[i+0];

+						printf("%02x ",blok8x8[i]);

+					}

+				}

+			}

+			else

+				i = (64*depth);

+	}

+

+}

+

+*/

+

diff --git a/src/color.c b/src/color.c
new file mode 100644
index 0000000..7057a23
--- /dev/null
+++ b/src/color.c
@@ -0,0 +1,31 @@
+#include "color.h"

+

+#define Mul_Shift(x,y)	((x*y)>>8)

+

+unsigned char clip(int value) {

+   if (value < 0) return (char) 0;

+   if (value > 255) return (char) 255;

+   return (unsigned char) value;

+}

+

+/* RGB -> YCbCr (also from BMP to JPEG) */

+// Y = 0.299 R + 0.587 G + 0.114 B

+// Cb = - 0.1687 R - 0.3313 G + 0.5 B + 128

+// Cr = 0.5 R - 0.4187 G - 0.0813 B + 128

+void RGB2YCbCr (unsigned char R, unsigned char G, unsigned char B,unsigned char *Y,unsigned char *Cb,unsigned char *Cr) {

+   *Y = clip(Mul_Shift(R,77) +  Mul_Shift(G,150) + Mul_Shift(B,29));

+   *Cb = clip((B>>1)-Mul_Shift(R,43) - Mul_Shift(G,85) + 128);

+   *Cr = clip((R>>1) - Mul_Shift(G,107) - Mul_Shift(B,21) + 128);

+}

+

+/* RGB -> YCbCr (also from JPEG to BMP) */

+// R = Y + 1.402 (Cr-128)

+// G = Y - 0.34414 (Cb-128) - 0.71414 (Cr-128)

+// B = Y + 1.772 (Cb-128)

+void YCbCr2RGB (unsigned char Y, unsigned char Cb, unsigned char Cr,unsigned char *R,unsigned char *G,unsigned char *B) {

+   *R = clip(Y + Mul_Shift((Cr-128),359));

+   *G = clip(Y - Mul_Shift((Cb-128),88) - Mul_Shift((Cr-128),183));

+   *B = clip(Y + Mul_Shift((Cb-128),454));

+}

+

+