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      1 /*
      2  *  Copyright (c) 2015 The WebM project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #ifndef VPX_DSP_VPX_DSP_COMMON_H_
     12 #define VPX_DSP_VPX_DSP_COMMON_H_
     13 
     14 #include "./vpx_config.h"
     15 #include "vpx/vpx_integer.h"
     16 #include "vpx_ports/mem.h"
     17 
     18 #ifdef __cplusplus
     19 extern "C" {
     20 #endif
     21 
     22 #define VPXMIN(x, y) (((x) < (y)) ? (x) : (y))
     23 #define VPXMAX(x, y) (((x) > (y)) ? (x) : (y))
     24 
     25 #define VPX_SWAP(type, a, b) \
     26   do {                       \
     27     type c = (b);            \
     28     b = a;                   \
     29     a = c;                   \
     30   } while (0)
     31 
     32 #if CONFIG_VP9_HIGHBITDEPTH
     33 // Note:
     34 // tran_low_t  is the datatype used for final transform coefficients.
     35 // tran_high_t is the datatype used for intermediate transform stages.
     36 typedef int64_t tran_high_t;
     37 typedef int32_t tran_low_t;
     38 #else
     39 // Note:
     40 // tran_low_t  is the datatype used for final transform coefficients.
     41 // tran_high_t is the datatype used for intermediate transform stages.
     42 typedef int32_t tran_high_t;
     43 typedef int16_t tran_low_t;
     44 #endif  // CONFIG_VP9_HIGHBITDEPTH
     45 
     46 static INLINE uint8_t clip_pixel(int val) {
     47   return (val > 255) ? 255 : (val < 0) ? 0 : val;
     48 }
     49 
     50 static INLINE int clamp(int value, int low, int high) {
     51   return value < low ? low : (value > high ? high : value);
     52 }
     53 
     54 static INLINE double fclamp(double value, double low, double high) {
     55   return value < low ? low : (value > high ? high : value);
     56 }
     57 
     58 #if CONFIG_VP9_HIGHBITDEPTH
     59 static INLINE uint16_t clip_pixel_highbd(int val, int bd) {
     60   switch (bd) {
     61     case 8:
     62     default: return (uint16_t)clamp(val, 0, 255);
     63     case 10: return (uint16_t)clamp(val, 0, 1023);
     64     case 12: return (uint16_t)clamp(val, 0, 4095);
     65   }
     66 }
     67 #endif  // CONFIG_VP9_HIGHBITDEPTH
     68 
     69 #ifdef __cplusplus
     70 }  // extern "C"
     71 #endif
     72 
     73 #endif  // VPX_DSP_VPX_DSP_COMMON_H_
     74