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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 
clip_pixel(int val)46 static INLINE uint8_t clip_pixel(int val) {
47   return (val > 255) ? 255 : (val < 0) ? 0 : val;
48 }
49 
clamp(int value,int low,int high)50 static INLINE int clamp(int value, int low, int high) {
51   return value < low ? low : (value > high ? high : value);
52 }
53 
fclamp(double value,double low,double high)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
clip_pixel_highbd(int val,int bd)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