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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_COMMON_H_
     12 #define VPX_DSP_COMMON_H_
     13 
     14 #include "./vpx_config.h"
     15 #include "vpx/vpx_integer.h"
     16 #include "vpx_dsp/vpx_dsp_common.h"
     17 #include "vpx_ports/mem.h"
     18 
     19 #ifdef __cplusplus
     20 extern "C" {
     21 #endif
     22 
     23 #define VPXMIN(x, y) (((x) < (y)) ? (x) : (y))
     24 #define VPXMAX(x, y) (((x) > (y)) ? (x) : (y))
     25 
     26 #if CONFIG_VP9_HIGHBITDEPTH
     27 // Note:
     28 // tran_low_t  is the datatype used for final transform coefficients.
     29 // tran_high_t is the datatype used for intermediate transform stages.
     30 typedef int64_t tran_high_t;
     31 typedef int32_t tran_low_t;
     32 #else
     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 int32_t tran_high_t;
     37 typedef int16_t tran_low_t;
     38 #endif  // CONFIG_VP9_HIGHBITDEPTH
     39 
     40 static INLINE uint8_t clip_pixel(int val) {
     41   return (val > 255) ? 255 : (val < 0) ? 0 : val;
     42 }
     43 
     44 static INLINE int clamp(int value, int low, int high) {
     45   return value < low ? low : (value > high ? high : value);
     46 }
     47 
     48 static INLINE double fclamp(double value, double low, double high) {
     49   return value < low ? low : (value > high ? high : value);
     50 }
     51 
     52 #if CONFIG_VP9_HIGHBITDEPTH
     53 static INLINE uint16_t clip_pixel_highbd(int val, int bd) {
     54   switch (bd) {
     55     case 8:
     56     default:
     57       return (uint16_t)clamp(val, 0, 255);
     58     case 10:
     59       return (uint16_t)clamp(val, 0, 1023);
     60     case 12:
     61       return (uint16_t)clamp(val, 0, 4095);
     62   }
     63 }
     64 #endif  // CONFIG_VP9_HIGHBITDEPTH
     65 
     66 #ifdef __cplusplus
     67 }  // extern "C"
     68 #endif
     69 
     70 #endif  // VPX_DSP_COMMON_H_
     71