pblc.h

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#ifdef HAVE_UNSIGNED_CHAR
#define UINT8 unsigned char
#else
#ifdef CHAR_IS_UNSIGNED
#define UINT8 char
#else
#define UINT8 short
#endif
#endif

#ifdef HAVE_UNSIGNED_SHORT
#define UINT16 unsigned short
#else
#define UINT16 unsigned int
#endif
#define INT16 short
#define INT32 long
#define JCOEF short

#define MAXJSAMPLE	255
#define CENTERJSAMPLE	128
#define JPEG_INTERNALS
#define SCALEBITS	16	/* speediest right-shift on some machines */
#define CBCR_OFFSET	((INT32) CENTERJSAMPLE << SCALEBITS)
#define ONE_HALF	((INT32) 1 << (SCALEBITS-1))
#define FIX(x)		((INT32) ((x) * (1L<<SCALEBITS) + 0.5))

#define R_Y_OFF		0			/* offset to R => Y section */
#define G_Y_OFF		(1*(MAXJSAMPLE+1))	/* offset to G => Y section */
#define B_Y_OFF		(2*(MAXJSAMPLE+1))	/* etc. */
#define R_CB_OFF	(3*(MAXJSAMPLE+1))
#define G_CB_OFF	(4*(MAXJSAMPLE+1))
#define B_CB_OFF	(5*(MAXJSAMPLE+1))
#define R_CR_OFF	B_CB_OFF		/* B=>Cb, R=>Cr are the same */
#define G_CR_OFF	(6*(MAXJSAMPLE+1))
#define B_CR_OFF	(7*(MAXJSAMPLE+1))
#define TABLE_SIZE	(8*(MAXJSAMPLE+1))