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/*
* Copyright (c) 2014 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 <arm_neon.h>
#include "./vpx_dsp_rtcd.h"
#include "./vpx_config.h"
#include "vpx/vpx_integer.h"
#include "vpx_dsp/variance.h"
#include "vpx_dsp/arm/mem_neon.h"
// Process a block exactly 4 wide and a multiple of 2 high.
static void var_filter_block2d_bil_w4(const uint8_t *src_ptr, uint8_t *dst_ptr,
int src_stride, int pixel_step,
int dst_height, int filter_offset) {
const uint8x8_t f0 = vdup_n_u8(8 - filter_offset);
const uint8x8_t f1 = vdup_n_u8(filter_offset);
int i = dst_height;
do {
uint8x8_t s0 = load_unaligned_u8(src_ptr, src_stride);
uint8x8_t s1 = load_unaligned_u8(src_ptr + pixel_step, src_stride);
uint16x8_t blend = vmlal_u8(vmull_u8(s0, f0), s1, f1);
uint8x8_t blend_u8 = vrshrn_n_u16(blend, 3);
vst1_u8(dst_ptr, blend_u8);
src_ptr += 2 * src_stride;
dst_ptr += 2 * 4;
i -= 2;
} while (i != 0);
}
// Process a block exactly 8 wide and any height.
static void var_filter_block2d_bil_w8(const uint8_t *src_ptr, uint8_t *dst_ptr,
int src_stride, int pixel_step,
int dst_height, int filter_offset) {
const uint8x8_t f0 = vdup_n_u8(8 - filter_offset);
const uint8x8_t f1 = vdup_n_u8(filter_offset);
int i = dst_height;
do {
uint8x8_t s0 = vld1_u8(src_ptr);
uint8x8_t s1 = vld1_u8(src_ptr + pixel_step);
uint16x8_t blend = vmlal_u8(vmull_u8(s0, f0), s1, f1);
uint8x8_t blend_u8 = vrshrn_n_u16(blend, 3);
vst1_u8(dst_ptr, blend_u8);
src_ptr += src_stride;
dst_ptr += 8;
} while (--i != 0);
}
// Process a block which is a mutiple of 16 wide and any height.
static void var_filter_block2d_bil_large(const uint8_t *src_ptr,
uint8_t *dst_ptr, int src_stride,
int pixel_step, int dst_width,
int dst_height, int filter_offset) {
const uint8x8_t f0 = vdup_n_u8(8 - filter_offset);
const uint8x8_t f1 = vdup_n_u8(filter_offset);
int i = dst_height;
do {
int j = 0;
do {
uint8x16_t s0 = vld1q_u8(src_ptr + j);
uint8x16_t s1 = vld1q_u8(src_ptr + j + pixel_step);
uint16x8_t blend_l =
vmlal_u8(vmull_u8(vget_low_u8(s0), f0), vget_low_u8(s1), f1);
uint16x8_t blend_h =
vmlal_u8(vmull_u8(vget_high_u8(s0), f0), vget_high_u8(s1), f1);
uint8x8_t out_lo = vrshrn_n_u16(blend_l, 3);
uint8x8_t out_hi = vrshrn_n_u16(blend_h, 3);
vst1q_u8(dst_ptr + j, vcombine_u8(out_lo, out_hi));
j += 16;
} while (j < dst_width);
src_ptr += src_stride;
dst_ptr += dst_width;
} while (--i != 0);
}
static void var_filter_block2d_bil_w16(const uint8_t *src_ptr, uint8_t *dst_ptr,
int src_stride, int pixel_step,
int dst_height, int filter_offset) {
var_filter_block2d_bil_large(src_ptr, dst_ptr, src_stride, pixel_step, 16,
dst_height, filter_offset);
}
static void var_filter_block2d_bil_w32(const uint8_t *src_ptr, uint8_t *dst_ptr,
int src_stride, int pixel_step,
int dst_height, int filter_offset) {
var_filter_block2d_bil_large(src_ptr, dst_ptr, src_stride, pixel_step, 32,
dst_height, filter_offset);
}
static void var_filter_block2d_bil_w64(const uint8_t *src_ptr, uint8_t *dst_ptr,
int src_stride, int pixel_step,
int dst_height, int filter_offset) {
var_filter_block2d_bil_large(src_ptr, dst_ptr, src_stride, pixel_step, 64,
dst_height, filter_offset);
}
#define SUBPEL_VARIANCE_WXH_NEON(w, h, padding) \
unsigned int vpx_sub_pixel_variance##w##x##h##_neon( \
const uint8_t *src, int src_stride, int xoffset, int yoffset, \
const uint8_t *ref, int ref_stride, uint32_t *sse) { \
uint8_t tmp0[w * (h + padding)]; \
uint8_t tmp1[w * h]; \
var_filter_block2d_bil_w##w(src, tmp0, src_stride, 1, (h + padding), \
xoffset); \
var_filter_block2d_bil_w##w(tmp0, tmp1, w, w, h, yoffset); \
return vpx_variance##w##x##h(tmp1, w, ref, ref_stride, sse); \
}
// 4x<h> blocks are processed two rows at a time, so require an extra row of
// padding.
SUBPEL_VARIANCE_WXH_NEON(4, 4, 2)
SUBPEL_VARIANCE_WXH_NEON(4, 8, 2)
SUBPEL_VARIANCE_WXH_NEON(8, 4, 1)
SUBPEL_VARIANCE_WXH_NEON(8, 8, 1)
SUBPEL_VARIANCE_WXH_NEON(8, 16, 1)
SUBPEL_VARIANCE_WXH_NEON(16, 8, 1)
SUBPEL_VARIANCE_WXH_NEON(16, 16, 1)
SUBPEL_VARIANCE_WXH_NEON(16, 32, 1)
SUBPEL_VARIANCE_WXH_NEON(32, 16, 1)
SUBPEL_VARIANCE_WXH_NEON(32, 32, 1)
SUBPEL_VARIANCE_WXH_NEON(32, 64, 1)
SUBPEL_VARIANCE_WXH_NEON(64, 32, 1)
SUBPEL_VARIANCE_WXH_NEON(64, 64, 1)
// 4xM filter writes an extra row to fdata because it processes two rows at a
// time.
#define SUB_PIXEL_AVG_VARIANCENXM(n, m) \
uint32_t vpx_sub_pixel_avg_variance##n##x##m##_neon( \
const uint8_t *src_ptr, int src_stride, int x_offset, int y_offset, \
const uint8_t *ref_ptr, int ref_stride, uint32_t *sse, \
const uint8_t *second_pred) { \
uint8_t temp0[n * (m + (n == 4 ? 2 : 1))]; \
uint8_t temp1[n * m]; \
\
if (n == 4) { \
var_filter_block2d_bil_w4(src_ptr, temp0, src_stride, 1, (m + 2), \
x_offset); \
var_filter_block2d_bil_w4(temp0, temp1, n, n, m, y_offset); \
} else if (n == 8) { \
var_filter_block2d_bil_w8(src_ptr, temp0, src_stride, 1, (m + 1), \
x_offset); \
var_filter_block2d_bil_w8(temp0, temp1, n, n, m, y_offset); \
} else { \
var_filter_block2d_bil_large(src_ptr, temp0, src_stride, 1, n, (m + 1), \
x_offset); \
var_filter_block2d_bil_large(temp0, temp1, n, n, n, m, y_offset); \
} \
\
vpx_comp_avg_pred(temp0, second_pred, n, m, temp1, n); \
\
return vpx_variance##n##x##m(temp0, n, ref_ptr, ref_stride, sse); \
}
SUB_PIXEL_AVG_VARIANCENXM(4, 4)
SUB_PIXEL_AVG_VARIANCENXM(4, 8)
SUB_PIXEL_AVG_VARIANCENXM(8, 4)
SUB_PIXEL_AVG_VARIANCENXM(8, 8)
SUB_PIXEL_AVG_VARIANCENXM(8, 16)
SUB_PIXEL_AVG_VARIANCENXM(16, 8)
SUB_PIXEL_AVG_VARIANCENXM(16, 16)
SUB_PIXEL_AVG_VARIANCENXM(16, 32)
SUB_PIXEL_AVG_VARIANCENXM(32, 16)
SUB_PIXEL_AVG_VARIANCENXM(32, 32)
SUB_PIXEL_AVG_VARIANCENXM(32, 64)
SUB_PIXEL_AVG_VARIANCENXM(64, 32)
SUB_PIXEL_AVG_VARIANCENXM(64, 64)
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