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* icv_sad.c 24* 25* @brief 26* This file contains the functions to compute SAD 27* 28* @author 29* Ittiam 30* 31* @par List of Functions: 32* sad_8x4() 33* 34* @remarks 35* None 36* 37******************************************************************************* 38*/ 39/*****************************************************************************/ 40/* File Includes */ 41/*****************************************************************************/ 42/* System include files */ 43#include <stdio.h> 44#include <stdint.h> 45#include <string.h> 46#include <stdlib.h> 47#include <assert.h> 48 49/* User include files */ 50#include "icv_datatypes.h" 51#include "icv_macros.h" 52#include "icv_platform_macros.h" 53#include "icv.h" 54 55/** 56******************************************************************************* 57* 58* @brief 59* Compute 8x4 SAD 60* 61* @par Description 62* Compute 8x4 sum of absolute differences between source and reference block 63* 64* @param[in] pu1_src 65* Source buffer 66* 67* @param[in] pu1_ref 68* Reference buffer 69* 70* @param[in] src_strd 71* Source stride 72* 73* @param[in] ref_strd 74* Reference stride 75* 76* @param[in] wd 77* Assumed to be 8 78* 79* @param[in] ht 80* Assumed to be 4 81 82* @returns 83* SAD 84* 85* @remarks 86* 87******************************************************************************* 88*/ 89WORD32 icv_sad_8x4(UWORD8 *pu1_src, 90 UWORD8 *pu1_ref, 91 WORD32 src_strd, 92 WORD32 ref_strd, 93 WORD32 wd, 94 WORD32 ht) 95{ 96 WORD32 sad; 97 WORD32 i; 98 WORD32 j; 99 UNUSED(wd); 100 UNUSED(ht); 101 102 ASSERT(wd == 8); 103 ASSERT(ht == 4); 104 105 sad = 0; 106 107 for(j = 0; j < 4; j++) 108 { 109 for(i = 0; i < 8; i++) 110 { 111 WORD32 src; 112 WORD32 ref; 113 114 src = *pu1_src++; 115 ref = *pu1_ref++; 116 117 sad += ABS_DIF(src, ref); 118 } 119 pu1_src += (src_strd - 8); 120 pu1_ref += (ref_strd - 8); 121 } 122 123 return sad; 124} 125