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      1 /******************************************************************************
      2  *
      3  * Copyright (C) 2015 The Android Open Source Project
      4  *
      5  * Licensed under the Apache License, Version 2.0 (the "License");
      6  * you may not use this file except in compliance with the License.
      7  * You may obtain a copy of the License at:
      8  *
      9  * http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  *
     17  *****************************************************************************
     18  * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
     19 */
     20 
     21 /*********************************************************************************
     22 * @file
     23 *  ih264_macros.h
     24 *
     25 * @brief
     26 *  Macro definitions used in the codec
     27 *
     28 * @author
     29 *  Ittiam
     30 *
     31 * @remarks
     32 *  None
     33 *
     34 *******************************************************************************
     35 */
     36 #ifndef _IH264_MACROS_H_
     37 #define _IH264_MACROS_H_
     38 
     39 /*****************************************************************************/
     40 /* Function Macros                                                           */
     41 /*****************************************************************************/
     42 #define RETURN_IF(cond, retval) if(cond) {return (retval);}
     43 #define UNUSED(x) ((void)(x))
     44 
     45 #define ALIGN128(x) ((((x) + 127) >> 7) << 7)
     46 #define ALIGN64(x)  ((((x) + 63) >> 6) << 6)
     47 #define ALIGN32(x)  ((((x) + 31) >> 5) << 5)
     48 #define ALIGN16(x)  ((((x) + 15) >> 4) << 4)
     49 #define ALIGN8(x)   ((((x) + 7) >> 3) << 3)
     50 #define ALIGN4(x)   ((((x) + 3) >> 2) << 2)
     51 #define ALIGN2(x)   ((((x) + 1) >> 1) << 1)
     52 
     53 /**
     54 ******************************************************************************
     55  *  @brief      Min, Max
     56 ******************************************************************************
     57  */
     58 #define MAX(a,b) ((a > b)?(a):(b))
     59 #define MIN(a,b) ((a < b)?(a):(b))
     60 #define MIN3(a,b,c) ((a) < (b)) ? (((a) < (c)) ? (a) : (c)) : (((b) < (c)) ? (b) : (c))
     61 #define MAX3(a,b,c) ((a) > (b)) ? (((a) > (c)) ? (a) : (c)) : (((b) > (c)) ? (b) : (c))
     62 /**
     63 ******************************************************************************
     64  *  @brief      Div, Mod
     65 ******************************************************************************
     66  */
     67 #define MOD(x,y) ((x)%(y))
     68 #define DIV(x,y) ((x)/(y))
     69 
     70 /**
     71 ******************************************************************************
     72  *  @brief      Clip
     73 ******************************************************************************
     74  */
     75 #define CLIP3(miny, maxy, y) (((y) < (miny))?(miny):(((y) > (maxy))?(maxy):(y)))
     76 
     77 /**
     78 ******************************************************************************
     79  *  @brief      True, False
     80 ******************************************************************************
     81  */
     82 #define BOOLEAN(x) (!!(x))
     83 
     84 /**
     85 ******************************************************************************
     86  *  @brief      Frequently used multiplications x2. x3, and x4
     87 ******************************************************************************
     88  */
     89 #define X2(a)   ((a) << 1)
     90 #define X3(a)   (((a) << 1) + (a))
     91 #define X4(a)   ((a) << 2)
     92 
     93 /**
     94 ******************************************************************************
     95  *  @brief      Misc
     96 ******************************************************************************
     97  */
     98 #define ABS(x)          ((x) < 0 ? (-(x)) : (x))
     99 #define SIGNXY(x,y)     (((y) < 0) ? (-1 * (x)) : (x))
    100 
    101 #define SIGN(x)     (((x) >= 0) ? (((x) > 0) ? 1 : 0) : -1)
    102 
    103 #define RESET_BIT(x, pos) (x) = (x) & ~(1 << pos);
    104 #define SET_BIT(x, pos) (x) = (x) | (1 << pos);
    105 #define GET_BIT(x, pos) ((x) >> (pos)) & 0x1
    106 
    107 #define INSERT_BIT(x, pos, bit) { RESET_BIT(x, pos); (x) = (x) | (bit << pos); }
    108 #endif /*_IH264_MACROS_H_*/
    109 
    110 
    111