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Import aom library

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This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.
This commit is contained in:
trav90 2018-10-15 21:45:30 -05:00 • committed by Roy Tam
commit edc8d83307
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third_party/aom/aom_dsp/x86/halfpix_variance_sse2.c vendored Normal file
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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include <assert.h>
#include "./aom_config.h"
#include "./aom_dsp_rtcd.h"
#include "aom/aom_integer.h"
void aom_half_horiz_vert_variance16x_h_sse2(const unsigned char *ref,
int ref_stride,
const unsigned char *src,
int src_stride, unsigned int height,
int *sum, unsigned int *sumsquared);
void aom_half_horiz_variance16x_h_sse2(const unsigned char *ref, int ref_stride,
const unsigned char *src, int src_stride,
unsigned int height, int *sum,
unsigned int *sumsquared);
void aom_half_vert_variance16x_h_sse2(const unsigned char *ref, int ref_stride,
const unsigned char *src, int src_stride,
unsigned int height, int *sum,
unsigned int *sumsquared);
uint32_t aom_variance_halfpixvar16x16_h_sse2(const unsigned char *src,
int src_stride,
const unsigned char *dst,
int dst_stride, uint32_t *sse) {
int xsum0;
unsigned int xxsum0;
aom_half_horiz_variance16x_h_sse2(src, src_stride, dst, dst_stride, 16,
&xsum0, &xxsum0);
*sse = xxsum0;
assert(xsum0 <= 255 * 16 * 16);
assert(xsum0 >= -255 * 16 * 16);
return (xxsum0 - ((uint32_t)((int64_t)xsum0 * xsum0) >> 8));
}
uint32_t aom_variance_halfpixvar16x16_v_sse2(const unsigned char *src,
int src_stride,
const unsigned char *dst,
int dst_stride, uint32_t *sse) {
int xsum0;
unsigned int xxsum0;
aom_half_vert_variance16x_h_sse2(src, src_stride, dst, dst_stride, 16, &xsum0,
&xxsum0);
*sse = xxsum0;
assert(xsum0 <= 255 * 16 * 16);
assert(xsum0 >= -255 * 16 * 16);
return (xxsum0 - ((uint32_t)((int64_t)xsum0 * xsum0) >> 8));
}
uint32_t aom_variance_halfpixvar16x16_hv_sse2(const unsigned char *src,
int src_stride,
const unsigned char *dst,
int dst_stride, uint32_t *sse) {
int xsum0;
unsigned int xxsum0;
aom_half_horiz_vert_variance16x_h_sse2(src, src_stride, dst, dst_stride, 16,
&xsum0, &xxsum0);
*sse = xxsum0;
assert(xsum0 <= 255 * 16 * 16);
assert(xsum0 >= -255 * 16 * 16);
return (xxsum0 - ((uint32_t)((int64_t)xsum0 * xsum0) >> 8));
}