ref: 7460798ba5666e25258a05f1dc7ad462cb3f1b19
dir: /vpx_dsp/x86/halfpix_variance_sse2.c/
/* * 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 "./vpx_config.h" #include "./vpx_dsp_rtcd.h" #include "vpx/vpx_integer.h" void vpx_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 vpx_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 vpx_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 vpx_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; vpx_half_horiz_variance16x_h_sse2(src, src_stride, dst, dst_stride, 16, &xsum0, &xxsum0); *sse = xxsum0; return (xxsum0 - (((uint32_t)xsum0 * xsum0) >> 8)); } uint32_t vpx_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; vpx_half_vert_variance16x_h_sse2(src, src_stride, dst, dst_stride, 16, &xsum0, &xxsum0); *sse = xxsum0; return (xxsum0 - (((uint32_t)xsum0 * xsum0) >> 8)); } uint32_t vpx_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; vpx_half_horiz_vert_variance16x_h_sse2(src, src_stride, dst, dst_stride, 16, &xsum0, &xxsum0); *sse = xxsum0; return (xxsum0 - (((uint32_t)xsum0 * xsum0) >> 8)); }