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/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <stdlib.h>
#include "dct.h"
#include "vpx_ports/mem.h"
unsigned int vp8_satd16x16_c(const unsigned char *src_ptr,
int src_stride,
const unsigned char *ref_ptr,
int ref_stride,
unsigned int *psatd)
{
int r, c, i;
unsigned int satd = 0;
DECLARE_ALIGNED(16, short, diff_in[256]);
DECLARE_ALIGNED(16, short, diff_out[16]);
short *in;
for (r = 0; r < 16; r++)
{
for (c = 0; c < 16; c++)
{
diff_in[r * 16 + c] = src_ptr[c] - ref_ptr[c];
}
src_ptr += src_stride;
ref_ptr += ref_stride;
}
in = diff_in;
for (r = 0; r < 16; r += 4)
{
for (c = 0; c < 16; c+=4)
{
vp8_short_walsh4x4_c(in + c, diff_out, 32);
for(i = 0; i < 16; i++)
satd += abs(diff_out[i]);
}
in += 64;
}
if (psatd)
*psatd = satd;
return satd;
}
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