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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/arm/subpel_variance_media.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 "./aom_config.h"
#include "./aom_dsp_rtcd.h"
#include "aom/aom_integer.h"
#include "aom_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 aom_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 aom_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 aom_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];
aom_filter_block2d_bil_first_pass_media(src_ptr, first_pass,
src_pixels_per_line, 9, 8, HFilter);
aom_filter_block2d_bil_second_pass_media(first_pass, second_pass, 8, 8, 8,
VFilter);
return aom_variance8x8_media(second_pass, 8, dst_ptr, dst_pixels_per_line,
sse);
}
unsigned int aom_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 = aom_variance_halfpixvar16x16_h_media(
src_ptr, src_pixels_per_line, dst_ptr, dst_pixels_per_line, sse);
} else if (xoffset == 0 && yoffset == 4) {
var = aom_variance_halfpixvar16x16_v_media(
src_ptr, src_pixels_per_line, dst_ptr, dst_pixels_per_line, sse);
} else if (xoffset == 4 && yoffset == 4) {
var = aom_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];
aom_filter_block2d_bil_first_pass_media(
src_ptr, first_pass, src_pixels_per_line, 17, 16, HFilter);
aom_filter_block2d_bil_second_pass_media(first_pass, second_pass, 16, 16,
16, VFilter);
var = aom_variance16x16_media(second_pass, 16, dst_ptr, dst_pixels_per_line,
sse);
}
return var;
}
#endif // HAVE_MEDIA