1 files changed, 62 insertions, 0 deletions
diff --git a/src/jpeg.c b/src/jpeg.c
new file mode 100644
index 0000000..5c779ea
--- /dev/null
+++ b/src/jpeg.c
@@ -0,0 +1,62 @@
+#define SOI_MK	0xFFD8		/* start of image	*/
+#define SOF_MK	0xFFC0		/* start of frame	*/
+#define EOI_MK	0xFFD9		/* end of image		*/
+#define DRI_MK	0xFFDD		/* restart interval	*/
+
+#define get_size(fi) (((unsigned int)Image[fi]) << 8) + (unsigned int)Image[fi+1]
+
+unsigned char GetJPEGHeaderInfo (unsigned char *Image,unsigned int *offset,unsigned int *x_size,unsigned int *y_size, unsigned char *depth)
+{
+	unsigned int aux;
+	int hCounter = 0;
+  	/* First find the SOI marker: */
+  		aux = get_size(hCounter); hCounter+=2;
+  		if (aux != SOI_MK)
+  		{ printf("INFO:\tNO SOI marker!\n"); return 0;}
+
+    	printf("%ld:\tINFO:\tFound the SOI marker!\n", hCounter);
+
+		/* Read first marker */
+		while( aux != SOF_MK)
+		{
+			aux = get_size(hCounter); hCounter+=2;
+			if(aux == SOF_MK)
+			{
+			  get_size(hCounter); hCounter+=2;	/* header size, don't care */
+
+	    	  /* load basic image parameters */
+	    	  hCounter++;	/* precision, 8bit, don't care */
+	    	  *y_size = get_size(hCounter); hCounter+=2;
+	    	  *x_size = get_size(hCounter); hCounter+=2;
+
+	    	  printf("\tINFO:\tImage size is %d by %d\n", *x_size, *y_size);
+
+	    	  *depth = Image[hCounter];	/* # of components */
+
+			  printf("\tINFO:\t");
+			  switch (*depth)
+			  {
+			  	  case 1:
+			      printf("Monochrome");
+			      break;
+			  	  case 3:
+			      printf("Color");
+			      break;
+			  	  default:
+			  	    printf("Not a");
+			      break;
+			    }
+			  printf(" JPEG image!\n");
+
+	    	  return 0;
+			}
+			else
+				hCounter = hCounter + get_size(hCounter);
+		}
+	return 1;
+}
+
+unsigned char WriteJPEGHeaderInfo (unsigned char *Image,unsigned int offset,unsigned int x_size,unsigned int y_size, unsigned char depth)
+{
+	return 0;
+}