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/******************************************************************************
*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*****************************************************************************
* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
*/
/**
*******************************************************************************
* @file
* icv_sad.c
*
* @brief
* This file contains the functions to compute SAD
*
* @author
* Ittiam
*
* @par List of Functions:
* sad_8x4()
*
* @remarks
* None
*
*******************************************************************************
*/
/*****************************************************************************/
/* File Includes */
/*****************************************************************************/
/* System include files */
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
/* User include files */
#include "icv_datatypes.h"
#include "icv_macros.h"
#include "icv_platform_macros.h"
#include "icv.h"
/**
*******************************************************************************
*
* @brief
* Compute 8x4 SAD
*
* @par Description
* Compute 8x4 sum of absolute differences between source and reference block
*
* @param[in] pu1_src
* Source buffer
*
* @param[in] pu1_ref
* Reference buffer
*
* @param[in] src_strd
* Source stride
*
* @param[in] ref_strd
* Reference stride
*
* @param[in] wd
* Assumed to be 8
*
* @param[in] ht
* Assumed to be 4
* @returns
* SAD
*
* @remarks
*
*******************************************************************************
*/
WORD32 icv_sad_8x4(UWORD8 *pu1_src,
UWORD8 *pu1_ref,
WORD32 src_strd,
WORD32 ref_strd,
WORD32 wd,
WORD32 ht)
{
WORD32 sad;
WORD32 i;
WORD32 j;
UNUSED(wd);
UNUSED(ht);
ASSERT(wd == 8);
ASSERT(ht == 4);
sad = 0;
for(j = 0; j < 4; j++)
{
for(i = 0; i < 8; i++)
{
WORD32 src;
WORD32 ref;
src = *pu1_src++;
ref = *pu1_ref++;
sad += ABS_DIF(src, ref);
}
pu1_src += (src_strd - 8);
pu1_ref += (ref_strd - 8);
}
return sad;
}
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