Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2016, Alliance for Open Media. All rights reserved
       3             :  *
       4             :  * This source code is subject to the terms of the BSD 2 Clause License and
       5             :  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
       6             :  * was not distributed with this source code in the LICENSE file, you can
       7             :  * obtain it at www.aomedia.org/license/software. If the Alliance for Open
       8             :  * Media Patent License 1.0 was not distributed with this source code in the
       9             :  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
      10             :  */
      11             : 
      12             : #ifndef AOM_DSP_AOM_DSP_COMMON_H_
      13             : #define AOM_DSP_AOM_DSP_COMMON_H_
      14             : 
      15             : #include "./aom_config.h"
      16             : #include "aom/aom_integer.h"
      17             : #include "aom_ports/mem.h"
      18             : 
      19             : #ifdef __cplusplus
      20             : extern "C" {
      21             : #endif
      22             : 
      23             : #ifndef MAX_SB_SIZE
      24             : #if CONFIG_AV1 && CONFIG_EXT_PARTITION
      25             : #define MAX_SB_SIZE 128
      26             : #else
      27             : #define MAX_SB_SIZE 64
      28             : #endif  // CONFIG_AV1 && CONFIG_EXT_PARTITION
      29             : #endif  // ndef MAX_SB_SIZE
      30             : 
      31             : #define AOMMIN(x, y) (((x) < (y)) ? (x) : (y))
      32             : #define AOMMAX(x, y) (((x) > (y)) ? (x) : (y))
      33             : 
      34             : #define NELEMENTS(x) (sizeof((x)) / sizeof((x)[0]))
      35             : 
      36             : #define IMPLIES(a, b) (!(a) || (b))  //  Logical 'a implies b' (or 'a -> b')
      37             : 
      38             : #define IS_POWER_OF_TWO(x) (((x) & ((x)-1)) == 0)
      39             : 
      40             : /* Left shifting a negative value became undefined behavior in C99 (downgraded
      41             :    from merely implementation-defined in C89). This should still compile to the
      42             :    correct thing on any two's-complement machine, but avoid ubsan warnings.*/
      43             : #define AOM_SIGNED_SHL(x, shift) ((x) * (((x)*0 + 1) << (shift)))
      44             : 
      45             : // These can be used to give a hint about branch outcomes.
      46             : // This can have an effect, even if your target processor has a
      47             : // good branch predictor, as these hints can affect basic block
      48             : // ordering by the compiler.
      49             : #ifdef __GNUC__
      50             : #define LIKELY(v) __builtin_expect(v, 1)
      51             : #define UNLIKELY(v) __builtin_expect(v, 0)
      52             : #else
      53             : #define LIKELY(v) (v)
      54             : #define UNLIKELY(v) (v)
      55             : #endif
      56             : 
      57             : #define AOM_SWAP(type, a, b) \
      58             :   do {                       \
      59             :     type c = (b);            \
      60             :     b = a;                   \
      61             :     a = c;                   \
      62             :   } while (0)
      63             : 
      64             : #if CONFIG_AOM_QM
      65             : typedef uint16_t qm_val_t;
      66             : #define AOM_QM_BITS 6
      67             : #endif
      68             : #if CONFIG_HIGHBITDEPTH
      69             : // Note:
      70             : // tran_low_t  is the datatype used for final transform coefficients.
      71             : // tran_high_t is the datatype used for intermediate transform stages.
      72             : typedef int64_t tran_high_t;
      73             : typedef int32_t tran_low_t;
      74             : #else
      75             : // Note:
      76             : // tran_low_t  is the datatype used for final transform coefficients.
      77             : // tran_high_t is the datatype used for intermediate transform stages.
      78             : typedef int32_t tran_high_t;
      79             : typedef int16_t tran_low_t;
      80             : #endif  // CONFIG_HIGHBITDEPTH
      81             : 
      82           0 : static INLINE uint8_t clip_pixel(int val) {
      83           0 :   return (val > 255) ? 255 : (val < 0) ? 0 : val;
      84             : }
      85             : 
      86           0 : static INLINE int clamp(int value, int low, int high) {
      87           0 :   return value < low ? low : (value > high ? high : value);
      88             : }
      89             : 
      90           0 : static INLINE double fclamp(double value, double low, double high) {
      91           0 :   return value < low ? low : (value > high ? high : value);
      92             : }
      93             : 
      94             : #if CONFIG_HIGHBITDEPTH
      95           0 : static INLINE uint16_t clip_pixel_highbd(int val, int bd) {
      96           0 :   switch (bd) {
      97             :     case 8:
      98           0 :     default: return (uint16_t)clamp(val, 0, 255);
      99           0 :     case 10: return (uint16_t)clamp(val, 0, 1023);
     100           0 :     case 12: return (uint16_t)clamp(val, 0, 4095);
     101             :   }
     102             : }
     103             : #endif  // CONFIG_HIGHBITDEPTH
     104             : 
     105             : #ifdef __cplusplus
     106             : }  // extern "C"
     107             : #endif
     108             : 
     109             : #endif  // AOM_DSP_AOM_DSP_COMMON_H_