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