drivers/staging/media/atomisp/pci/atomisp2/css2400/ia_css_frac.h

   1 /*
   2  * Support for Intel Camera Imaging ISP subsystem.
   3  * Copyright (c) 2015, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  */
  14
  15 #ifndef _IA_CSS_FRAC_H
  16 #define _IA_CSS_FRAC_H
  17
  18 /** @file
  19  * This file contains typedefs used for fractional numbers
  20  */
  21
  22 #include <type_support.h>
  23
  24 /* Fixed point types.
  25  * NOTE: the 16 bit fixed point types actually occupy 32 bits
  26  * to save on extension operations in the ISP code.
  27  */
  28 /** Unsigned fixed point value, 0 integer bits, 16 fractional bits */
  29 typedef uint32_t ia_css_u0_16;
  30 /** Unsigned fixed point value, 5 integer bits, 11 fractional bits */
  31 typedef uint32_t ia_css_u5_11;
  32 /** Unsigned fixed point value, 8 integer bits, 8 fractional bits */
  33 typedef uint32_t ia_css_u8_8;
  34 /** Signed fixed point value, 0 integer bits, 15 fractional bits */
  35 typedef int32_t ia_css_s0_15;
  36
  37 #endif /* _IA_CSS_FRAC_H */