Source code
Revision control
Copy as Markdown
Other Tools
/*
* Copyright (c) 2024, 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 <arm_neon.h>
#include <assert.h>
#include <stdint.h>
#include "config/aom_config.h"
#include "config/av1_rtcd.h"
#include "aom_dsp/arm/mem_neon.h"
#include "aom_dsp/arm/transpose_neon.h"
#include "av1/common/resize.h"
static inline uint8x8_t convolve8_4(const int16x4_t s0, const int16x4_t s1,
const int16x4_t s2, const int16x4_t s3,
const int16x4_t s4, const int16x4_t s5,
const int16x4_t s6, const int16x4_t s7,
const int16x8_t filter) {
const int16x4_t filter_lo = vget_low_s16(filter);
const int16x4_t filter_hi = vget_high_s16(filter);
int16x4_t sum = vmul_lane_s16(s0, filter_lo, 0);
sum = vmla_lane_s16(sum, s1, filter_lo, 1);
sum = vmla_lane_s16(sum, s2, filter_lo, 2);
sum = vmla_lane_s16(sum, s5, filter_hi, 1);
sum = vmla_lane_s16(sum, s6, filter_hi, 2);
sum = vmla_lane_s16(sum, s7, filter_hi, 3);
sum = vqadd_s16(sum, vmul_lane_s16(s3, filter_lo, 3));
sum = vqadd_s16(sum, vmul_lane_s16(s4, filter_hi, 0));
return vqrshrun_n_s16(vcombine_s16(sum, vdup_n_s16(0)), FILTER_BITS);
}
static inline uint8x8_t convolve8_8(const int16x8_t s0, const int16x8_t s1,
const int16x8_t s2, const int16x8_t s3,
const int16x8_t s4, const int16x8_t s5,
const int16x8_t s6, const int16x8_t s7,
const int16x8_t filter) {
const int16x4_t filter_lo = vget_low_s16(filter);
const int16x4_t filter_hi = vget_high_s16(filter);
int16x8_t sum = vmulq_lane_s16(s0, filter_lo, 0);
sum = vmlaq_lane_s16(sum, s1, filter_lo, 1);
sum = vmlaq_lane_s16(sum, s2, filter_lo, 2);
sum = vmlaq_lane_s16(sum, s5, filter_hi, 1);
sum = vmlaq_lane_s16(sum, s6, filter_hi, 2);
sum = vmlaq_lane_s16(sum, s7, filter_hi, 3);
sum = vqaddq_s16(sum, vmulq_lane_s16(s3, filter_lo, 3));
sum = vqaddq_s16(sum, vmulq_lane_s16(s4, filter_hi, 0));
return vqrshrun_n_s16(sum, FILTER_BITS);
}
void av1_convolve_horiz_rs_neon(const uint8_t *src, int src_stride,
uint8_t *dst, int dst_stride, int w, int h,
const int16_t *x_filter, int x0_qn,
int x_step_qn) {
if ((w == 4 && h % 4 != 0) || (w % 8 == 0 && h % 8 != 0) || w % 8 != 0) {
av1_convolve_horiz_rs_c(src, src_stride, dst, dst_stride, w, h, x_filter,
x0_qn, x_step_qn);
return;
}
DECLARE_ALIGNED(16, uint8_t, temp[8 * 8]);
src -= UPSCALE_NORMATIVE_TAPS / 2 - 1;
if (w == 4) {
do {
int x_qn = x0_qn;
// Process a 4x4 tile.
for (int r = 0; r < 4; ++r) {
const uint8_t *const s = &src[x_qn >> RS_SCALE_SUBPEL_BITS];
const ptrdiff_t filter_offset =
UPSCALE_NORMATIVE_TAPS *
((x_qn & RS_SCALE_SUBPEL_MASK) >> RS_SCALE_EXTRA_BITS);
const int16x8_t filter = vld1q_s16(x_filter + filter_offset);
uint8x8_t t0, t1, t2, t3;
load_u8_8x4(s, src_stride, &t0, &t1, &t2, &t3);
transpose_elems_inplace_u8_8x4(&t0, &t1, &t2, &t3);
int16x4_t s0 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t0)));
int16x4_t s1 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t1)));
int16x4_t s2 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t2)));
int16x4_t s3 = vget_low_s16(vreinterpretq_s16_u16(vmovl_u8(t3)));
int16x4_t s4 = vget_high_s16(vreinterpretq_s16_u16(vmovl_u8(t0)));
int16x4_t s5 = vget_high_s16(vreinterpretq_s16_u16(vmovl_u8(t1)));
int16x4_t s6 = vget_high_s16(vreinterpretq_s16_u16(vmovl_u8(t2)));
int16x4_t s7 = vget_high_s16(vreinterpretq_s16_u16(vmovl_u8(t3)));
uint8x8_t d0 = convolve8_4(s0, s1, s2, s3, s4, s5, s6, s7, filter);
store_u8_4x1(&temp[r * 4], d0);
x_qn += x_step_qn;
}
// Transpose the 4x4 result tile and store.
uint8x8_t d01 = vld1_u8(temp + 0);
uint8x8_t d23 = vld1_u8(temp + 8);
transpose_elems_inplace_u8_4x4(&d01, &d23);
store_u8x4_strided_x2(dst + 0 * dst_stride, 2 * dst_stride, d01);
store_u8x4_strided_x2(dst + 1 * dst_stride, 2 * dst_stride, d23);
dst += 4 * dst_stride;
src += 4 * src_stride;
h -= 4;
} while (h > 0);
} else {
do {
int x_qn = x0_qn;
uint8_t *d = dst;
int width = w;
do {
// Process an 8x8 tile.
for (int r = 0; r < 8; ++r) {
const uint8_t *const s = &src[x_qn >> RS_SCALE_SUBPEL_BITS];
const ptrdiff_t filter_offset =
UPSCALE_NORMATIVE_TAPS *
((x_qn & RS_SCALE_SUBPEL_MASK) >> RS_SCALE_EXTRA_BITS);
const int16x8_t filter = vld1q_s16(x_filter + filter_offset);
uint8x8_t t0, t1, t2, t3, t4, t5, t6, t7;
load_u8_8x8(s, src_stride, &t0, &t1, &t2, &t3, &t4, &t5, &t6, &t7);
transpose_elems_u8_8x8(t0, t1, t2, t3, t4, t5, t6, t7, &t0, &t1, &t2,
&t3, &t4, &t5, &t6, &t7);
int16x8_t s0 = vreinterpretq_s16_u16(vmovl_u8(t0));
int16x8_t s1 = vreinterpretq_s16_u16(vmovl_u8(t1));
int16x8_t s2 = vreinterpretq_s16_u16(vmovl_u8(t2));
int16x8_t s3 = vreinterpretq_s16_u16(vmovl_u8(t3));
int16x8_t s4 = vreinterpretq_s16_u16(vmovl_u8(t4));
int16x8_t s5 = vreinterpretq_s16_u16(vmovl_u8(t5));
int16x8_t s6 = vreinterpretq_s16_u16(vmovl_u8(t6));
int16x8_t s7 = vreinterpretq_s16_u16(vmovl_u8(t7));
uint8x8_t d0 = convolve8_8(s0, s1, s2, s3, s4, s5, s6, s7, filter);
vst1_u8(&temp[r * 8], d0);
x_qn += x_step_qn;
}
// Transpose the 8x8 result tile and store.
uint8x8_t d0, d1, d2, d3, d4, d5, d6, d7;
load_u8_8x8(temp, 8, &d0, &d1, &d2, &d3, &d4, &d5, &d6, &d7);
transpose_elems_inplace_u8_8x8(&d0, &d1, &d2, &d3, &d4, &d5, &d6, &d7);
store_u8_8x8(d, dst_stride, d0, d1, d2, d3, d4, d5, d6, d7);
d += 8;
width -= 8;
} while (width != 0);
dst += 8 * dst_stride;
src += 8 * src_stride;
h -= 8;
} while (h > 0);
}
}