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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);
}
static void var_filter_block2d_avg(const uint8_t *src_ptr, uint8_t *dst_ptr,
int src_stride, int pixel_step,
int dst_width, int dst_height) {
int i = dst_height;
// We only specialize on the filter values for large block sizes (>= 16x16.)
assert(dst_width >= 16 && dst_width % 16 == 0);
do {
int j = 0;
do {
uint8x16_t s0 = vld1q_u8(src_ptr + j);
uint8x16_t s1 = vld1q_u8(src_ptr + j + pixel_step);
uint8x16_t avg = vrhaddq_u8(s0, s1);
vst1q_u8(dst_ptr + j, avg);
j += 16;
} while (j < dst_width);
src_ptr += src_stride;
dst_ptr += dst_width;
} while (--i != 0);
}
#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); \
}
#define SPECIALIZED_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, unsigned int *sse) { \
if (xoffset == 0) { \
if (yoffset == 0) { \
return vpx_variance##w##x##h(src, src_stride, ref, ref_stride, sse); \
} else if (yoffset == 4) { \
uint8_t tmp[w * h]; \
var_filter_block2d_avg(src, tmp, src_stride, src_stride, w, h); \
return vpx_variance##w##x##h(tmp, w, ref, ref_stride, sse); \
} else { \
uint8_t tmp[w * h]; \
var_filter_block2d_bil_w##w(src, tmp, src_stride, src_stride, h, \
yoffset); \
return vpx_variance##w##x##h(tmp, w, ref, ref_stride, sse); \
} \
} else if (xoffset == 4) { \
uint8_t tmp0[w * (h + padding)]; \
if (yoffset == 0) { \
var_filter_block2d_avg(src, tmp0, src_stride, 1, w, h); \
return vpx_variance##w##x##h(tmp0, w, ref, ref_stride, sse); \
} else if (yoffset == 4) { \
uint8_t tmp1[w * (h + padding)]; \
var_filter_block2d_avg(src, tmp0, src_stride, 1, w, (h + padding)); \
var_filter_block2d_avg(tmp0, tmp1, w, w, w, h); \
return vpx_variance##w##x##h(tmp1, w, ref, ref_stride, sse); \
} else { \
uint8_t tmp1[w * (h + padding)]; \
var_filter_block2d_avg(src, tmp0, src_stride, 1, w, (h + padding)); \
var_filter_block2d_bil_w##w(tmp0, tmp1, w, w, h, yoffset); \
return vpx_variance##w##x##h(tmp1, w, ref, ref_stride, sse); \
} \
} else { \
uint8_t tmp0[w * (h + padding)]; \
if (yoffset == 0) { \
var_filter_block2d_bil_w##w(src, tmp0, src_stride, 1, h, xoffset); \
return vpx_variance##w##x##h(tmp0, w, ref, ref_stride, sse); \
} else if (yoffset == 4) { \
uint8_t tmp1[w * h]; \
var_filter_block2d_bil_w##w(src, tmp0, src_stride, 1, (h + padding), \
xoffset); \
var_filter_block2d_avg(tmp0, tmp1, w, w, w, h); \
return vpx_variance##w##x##h(tmp1, w, ref, ref_stride, sse); \
} else { \
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)
SPECIALIZED_SUBPEL_VARIANCE_WXH_NEON(16, 8, 1)
SPECIALIZED_SUBPEL_VARIANCE_WXH_NEON(16, 16, 1)
SPECIALIZED_SUBPEL_VARIANCE_WXH_NEON(16, 32, 1)
SPECIALIZED_SUBPEL_VARIANCE_WXH_NEON(32, 16, 1)
SPECIALIZED_SUBPEL_VARIANCE_WXH_NEON(32, 32, 1)
SPECIALIZED_SUBPEL_VARIANCE_WXH_NEON(32, 64, 1)
SPECIALIZED_SUBPEL_VARIANCE_WXH_NEON(64, 32, 1)
SPECIALIZED_SUBPEL_VARIANCE_WXH_NEON(64, 64, 1)
// Combine bilinear filter with vpx_comp_avg_pred for blocks having width 4.
static void avg_pred_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 uint8_t *second_pred) {
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);
uint8x8_t p = vld1_u8(second_pred);
uint8x8_t avg = vrhadd_u8(blend_u8, p);
vst1_u8(dst_ptr, avg);
src_ptr += 2 * src_stride;
dst_ptr += 2 * 4;
second_pred += 2 * 4;
i -= 2;
} while (i != 0);
}
// Combine bilinear filter with vpx_comp_avg_pred for blocks having width 8.
static void avg_pred_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 uint8_t *second_pred) {
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);
uint8x8_t p = vld1_u8(second_pred);
uint8x8_t avg = vrhadd_u8(blend_u8, p);
vst1_u8(dst_ptr, avg);
src_ptr += src_stride;
dst_ptr += 8;
second_pred += 8;
} while (--i > 0);
}
// Combine bilinear filter with vpx_comp_avg_pred for large blocks.
static void avg_pred_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 uint8_t *second_pred) {
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);
uint8x16_t blend_u8 =
vcombine_u8(vrshrn_n_u16(blend_l, 3), vrshrn_n_u16(blend_h, 3));
uint8x16_t p = vld1q_u8(second_pred);
uint8x16_t avg = vrhaddq_u8(blend_u8, p);
vst1q_u8(dst_ptr + j, avg);
j += 16;
second_pred += 16;
} while (j < dst_width);
src_ptr += src_stride;
dst_ptr += dst_width;
} while (--i != 0);
}
// Combine bilinear filter with vpx_comp_avg_pred for blocks having width 16.
static void avg_pred_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, const uint8_t *second_pred) {
avg_pred_var_filter_block2d_bil_large(src_ptr, dst_ptr, src_stride,
pixel_step, 16, dst_height,
filter_offset, second_pred);
}
// Combine bilinear filter with vpx_comp_avg_pred for blocks having width 32.
static void avg_pred_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, const uint8_t *second_pred) {
avg_pred_var_filter_block2d_bil_large(src_ptr, dst_ptr, src_stride,
pixel_step, 32, dst_height,
filter_offset, second_pred);
}
// Combine bilinear filter with vpx_comp_avg_pred for blocks having width 64.
static void avg_pred_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, const uint8_t *second_pred) {
avg_pred_var_filter_block2d_bil_large(src_ptr, dst_ptr, src_stride,
pixel_step, 64, dst_height,
filter_offset, second_pred);
}
// Combine averaging subpel filter with vpx_comp_avg_pred.
static void avg_pred_var_filter_block2d_avg(const uint8_t *src_ptr,
uint8_t *dst_ptr, int src_stride,
int pixel_step, int dst_width,
int dst_height,
const uint8_t *second_pred) {
int i = dst_height;
// We only specialize on the filter values for large block sizes (>= 16x16.)
assert(dst_width >= 16 && dst_width % 16 == 0);
do {
int j = 0;
do {
uint8x16_t s0 = vld1q_u8(src_ptr + j);
uint8x16_t s1 = vld1q_u8(src_ptr + j + pixel_step);
uint8x16_t avg = vrhaddq_u8(s0, s1);
uint8x16_t p = vld1q_u8(second_pred);
avg = vrhaddq_u8(avg, p);
vst1q_u8(dst_ptr + j, avg);
j += 16;
second_pred += 16;
} while (j < dst_width);
src_ptr += src_stride;
dst_ptr += dst_width;
} while (--i != 0);
}
// Implementation of vpx_comp_avg_pred for blocks having width >= 16.
static void avg_pred(const uint8_t *src_ptr, uint8_t *dst_ptr, int src_stride,
int dst_width, int dst_height,
const uint8_t *second_pred) {
int i = dst_height;
// We only specialize on the filter values for large block sizes (>= 16x16.)
assert(dst_width >= 16 && dst_width % 16 == 0);
do {
int j = 0;
do {
uint8x16_t s = vld1q_u8(src_ptr + j);
uint8x16_t p = vld1q_u8(second_pred);
uint8x16_t avg = vrhaddq_u8(s, p);
vst1q_u8(dst_ptr + j, avg);
j += 16;
second_pred += 16;
} while (j < dst_width);
src_ptr += src_stride;
dst_ptr += dst_width;
} while (--i != 0);
}
#define SUBPEL_AVG_VARIANCE_WXH_NEON(w, h, padding) \
unsigned int vpx_sub_pixel_avg_variance##w##x##h##_neon( \
const uint8_t *src, int source_stride, int xoffset, int yoffset, \
const uint8_t *ref, int ref_stride, uint32_t *sse, \
const uint8_t *second_pred) { \
uint8_t tmp0[w * (h + padding)]; \
uint8_t tmp1[w * h]; \
var_filter_block2d_bil_w##w(src, tmp0, source_stride, 1, (h + padding), \
xoffset); \
avg_pred_var_filter_block2d_bil_w##w(tmp0, tmp1, w, w, h, yoffset, \
second_pred); \
return vpx_variance##w##x##h(tmp1, w, ref, ref_stride, sse); \
}
#define SPECIALIZED_SUBPEL_AVG_VARIANCE_WXH_NEON(w, h, padding) \
unsigned int vpx_sub_pixel_avg_variance##w##x##h##_neon( \
const uint8_t *src, int source_stride, int xoffset, int yoffset, \
const uint8_t *ref, int ref_stride, unsigned int *sse, \
const uint8_t *second_pred) { \
if (xoffset == 0) { \
uint8_t tmp[w * h]; \
if (yoffset == 0) { \
avg_pred(src, tmp, source_stride, w, h, second_pred); \
return vpx_variance##w##x##h(tmp, w, ref, ref_stride, sse); \
} else if (yoffset == 4) { \
avg_pred_var_filter_block2d_avg(src, tmp, source_stride, \
source_stride, w, h, second_pred); \
return vpx_variance##w##x##h(tmp, w, ref, ref_stride, sse); \
} else { \
avg_pred_var_filter_block2d_bil_w##w( \
src, tmp, source_stride, source_stride, h, yoffset, second_pred); \
return vpx_variance##w##x##h(tmp, w, ref, ref_stride, sse); \
} \
} else if (xoffset == 4) { \
uint8_t tmp0[w * (h + padding)]; \
if (yoffset == 0) { \
avg_pred_var_filter_block2d_avg(src, tmp0, source_stride, 1, w, h, \
second_pred); \
return vpx_variance##w##x##h(tmp0, w, ref, ref_stride, sse); \
} else if (yoffset == 4) { \
uint8_t tmp1[w * (h + padding)]; \
var_filter_block2d_avg(src, tmp0, source_stride, 1, w, (h + padding)); \
avg_pred_var_filter_block2d_avg(tmp0, tmp1, w, w, w, h, second_pred); \
return vpx_variance##w##x##h(tmp1, w, ref, ref_stride, sse); \
} else { \
uint8_t tmp1[w * (h + padding)]; \
var_filter_block2d_avg(src, tmp0, source_stride, 1, w, (h + padding)); \
avg_pred_var_filter_block2d_bil_w##w(tmp0, tmp1, w, w, h, yoffset, \
second_pred); \
return vpx_variance##w##x##h(tmp1, w, ref, ref_stride, sse); \
} \
} else { \
uint8_t tmp0[w * (h + padding)]; \
if (yoffset == 0) { \
avg_pred_var_filter_block2d_bil_w##w(src, tmp0, source_stride, 1, h, \
xoffset, second_pred); \
return vpx_variance##w##x##h(tmp0, w, ref, ref_stride, sse); \
} else if (yoffset == 4) { \
uint8_t tmp1[w * h]; \
var_filter_block2d_bil_w##w(src, tmp0, source_stride, 1, \
(h + padding), xoffset); \
avg_pred_var_filter_block2d_avg(tmp0, tmp1, w, w, w, h, second_pred); \
return vpx_variance##w##x##h(tmp1, w, ref, ref_stride, sse); \
} else { \
uint8_t tmp1[w * h]; \
var_filter_block2d_bil_w##w(src, tmp0, source_stride, 1, \
(h + padding), xoffset); \
avg_pred_var_filter_block2d_bil_w##w(tmp0, tmp1, w, w, h, yoffset, \
second_pred); \
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_AVG_VARIANCE_WXH_NEON(4, 4, 2)
SUBPEL_AVG_VARIANCE_WXH_NEON(4, 8, 2)
SUBPEL_AVG_VARIANCE_WXH_NEON(8, 4, 1)
SUBPEL_AVG_VARIANCE_WXH_NEON(8, 8, 1)
SUBPEL_AVG_VARIANCE_WXH_NEON(8, 16, 1)
SPECIALIZED_SUBPEL_AVG_VARIANCE_WXH_NEON(16, 8, 1)
SPECIALIZED_SUBPEL_AVG_VARIANCE_WXH_NEON(16, 16, 1)
SPECIALIZED_SUBPEL_AVG_VARIANCE_WXH_NEON(16, 32, 1)
SPECIALIZED_SUBPEL_AVG_VARIANCE_WXH_NEON(32, 16, 1)
SPECIALIZED_SUBPEL_AVG_VARIANCE_WXH_NEON(32, 32, 1)
SPECIALIZED_SUBPEL_AVG_VARIANCE_WXH_NEON(32, 64, 1)
SPECIALIZED_SUBPEL_AVG_VARIANCE_WXH_NEON(64, 32, 1)
SPECIALIZED_SUBPEL_AVG_VARIANCE_WXH_NEON(64, 64, 1)
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