ref: d8f3bb1837f7ef966b1a380359e84d15bb92e18b
dir: /vpx_dsp/arm/subpel_variance_media.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"
#include "vpx_ports/mem.h"
#if HAVE_MEDIA
static const int16_t bilinear_filters_media[8][2] = {
{ 128, 0 },
{ 112, 16 },
{ 96, 32 },
{ 80, 48 },
{ 64, 64 },
{ 48, 80 },
{ 32, 96 },
{ 16, 112 }
};
extern void vpx_filter_block2d_bil_first_pass_media(const uint8_t *src_ptr,
uint16_t *dst_ptr,
uint32_t src_pitch,
uint32_t height,
uint32_t width,
const int16_t *filter);
extern void vpx_filter_block2d_bil_second_pass_media(const uint16_t *src_ptr,
uint8_t *dst_ptr,
int32_t src_pitch,
uint32_t height,
uint32_t width,
const int16_t *filter);
unsigned int vpx_sub_pixel_variance8x8_media(const uint8_t *src_ptr,
int src_pixels_per_line,
int xoffset, int yoffset,
const uint8_t *dst_ptr,
int dst_pixels_per_line,
unsigned int *sse) {
uint16_t first_pass[10*8];
uint8_t second_pass[8*8];
const int16_t *HFilter, *VFilter;
HFilter = bilinear_filters_media[xoffset];
VFilter = bilinear_filters_media[yoffset];
vpx_filter_block2d_bil_first_pass_media(src_ptr, first_pass,
src_pixels_per_line,
9, 8, HFilter);
vpx_filter_block2d_bil_second_pass_media(first_pass, second_pass,
8, 8, 8, VFilter);
return vpx_variance8x8_media(second_pass, 8, dst_ptr,
dst_pixels_per_line, sse);
}
unsigned int vpx_sub_pixel_variance16x16_media(const uint8_t *src_ptr,
int src_pixels_per_line,
int xoffset,
int yoffset,
const uint8_t *dst_ptr,
int dst_pixels_per_line,
unsigned int *sse) {
uint16_t first_pass[36*16];
uint8_t second_pass[20*16];
const int16_t *HFilter, *VFilter;
unsigned int var;
if (xoffset == 4 && yoffset == 0) {
var = vpx_variance_halfpixvar16x16_h_media(src_ptr, src_pixels_per_line,
dst_ptr, dst_pixels_per_line,
sse);
} else if (xoffset == 0 && yoffset == 4) {
var = vpx_variance_halfpixvar16x16_v_media(src_ptr, src_pixels_per_line,
dst_ptr, dst_pixels_per_line,
sse);
} else if (xoffset == 4 && yoffset == 4) {
var = vpx_variance_halfpixvar16x16_hv_media(src_ptr, src_pixels_per_line,
dst_ptr, dst_pixels_per_line,
sse);
} else {
HFilter = bilinear_filters_media[xoffset];
VFilter = bilinear_filters_media[yoffset];
vpx_filter_block2d_bil_first_pass_media(src_ptr, first_pass,
src_pixels_per_line,
17, 16, HFilter);
vpx_filter_block2d_bil_second_pass_media(first_pass, second_pass,
16, 16, 16, VFilter);
var = vpx_variance16x16_media(second_pass, 16, dst_ptr,
dst_pixels_per_line, sse);
}
return var;
}
#endif // HAVE_MEDIA