a564b18d7f
This commit clarifies integer value range for vairables used in several variance functions, also change to use proper type conversion to reflect the value ranges. Change-Id: Ic3234b83a912ce1ad12d1b254f3378763e15cc5c
83 lines
3.4 KiB
C
83 lines
3.4 KiB
C
/*
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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 <assert.h>
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#include "./vpx_config.h"
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#include "./vpx_dsp_rtcd.h"
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#include "vpx/vpx_integer.h"
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void vpx_half_horiz_vert_variance16x_h_sse2(const unsigned char *ref,
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int ref_stride,
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const unsigned char *src,
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int src_stride,
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unsigned int height,
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int *sum,
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unsigned int *sumsquared);
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void vpx_half_horiz_variance16x_h_sse2(const unsigned char *ref, int ref_stride,
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const unsigned char *src, int src_stride,
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unsigned int height, int *sum,
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unsigned int *sumsquared);
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void vpx_half_vert_variance16x_h_sse2(const unsigned char *ref, int ref_stride,
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const unsigned char *src, int src_stride,
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unsigned int height, int *sum,
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unsigned int *sumsquared);
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uint32_t vpx_variance_halfpixvar16x16_h_sse2(const unsigned char *src,
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int src_stride,
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const unsigned char *dst,
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int dst_stride,
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uint32_t *sse) {
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int xsum0;
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unsigned int xxsum0;
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vpx_half_horiz_variance16x_h_sse2(src, src_stride, dst, dst_stride, 16,
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&xsum0, &xxsum0);
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*sse = xxsum0;
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assert(xsum0 <= 255 * 16 * 16);
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assert(xsum0 >= -255 * 16 * 16);
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return (xxsum0 - ((uint32_t)((int64_t)xsum0 * xsum0) >> 8));
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}
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uint32_t vpx_variance_halfpixvar16x16_v_sse2(const unsigned char *src,
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int src_stride,
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const unsigned char *dst,
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int dst_stride,
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uint32_t *sse) {
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int xsum0;
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unsigned int xxsum0;
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vpx_half_vert_variance16x_h_sse2(src, src_stride, dst, dst_stride, 16,
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&xsum0, &xxsum0);
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*sse = xxsum0;
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assert(xsum0 <= 255 * 16 * 16);
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assert(xsum0 >= -255 * 16 * 16);
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return (xxsum0 - ((uint32_t)((int64_t)xsum0 * xsum0) >> 8));
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}
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uint32_t vpx_variance_halfpixvar16x16_hv_sse2(const unsigned char *src,
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int src_stride,
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const unsigned char *dst,
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int dst_stride,
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uint32_t *sse) {
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int xsum0;
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unsigned int xxsum0;
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vpx_half_horiz_vert_variance16x_h_sse2(src, src_stride, dst, dst_stride, 16,
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&xsum0, &xxsum0);
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*sse = xxsum0;
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assert(xsum0 <= 255 * 16 * 16);
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assert(xsum0 >= -255 * 16 * 16);
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return (xxsum0 - ((uint32_t)((int64_t)xsum0 * xsum0) >> 8));
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}
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