ref: 1d5c1a493742503838b12f108e041644d4838656
dir: /src/arm/looprestoration_init_tmpl.c/
/*
* Copyright © 2018, VideoLAN and dav1d authors
* Copyright © 2018, Two Orioles, LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "src/cpu.h"
#include "src/looprestoration.h"
#include "common/attributes.h"
#include "src/tables.h"
#if BITDEPTH == 8
// This calculates things slightly differently than the reference C version.
// This version calculates roughly this:
// int16_t sum = 0;
// for (int i = 0; i < 7; i++)
// sum += src[idx] * fh[i];
// int16_t sum2 = (src[x] << 7) - (1 << (BITDEPTH + 6)) + rounding_off_h;
// sum = iclip(sum + sum2, INT16_MIN, INT16_MAX) >> round_bits_h;
// sum += 2048;
void dav1d_wiener_filter_h_neon(int16_t *dst, const pixel (*left)[4],
const pixel *src, ptrdiff_t stride,
const int16_t fh[7], const intptr_t w,
int h, enum LrEdgeFlags edges);
// This calculates things slightly differently than the reference C version.
// This version calculates roughly this:
// fv[3] += 128;
// int32_t sum = 0;
// for (int i = 0; i < 7; i++)
// sum += mid[idx] * fv[i];
// sum = (sum + rounding_off_v) >> round_bits_v;
// This function assumes that the width is a multiple of 8.
void dav1d_wiener_filter_v_neon(pixel *dst, ptrdiff_t stride,
const int16_t *mid, int w, int h,
const int16_t fv[7], enum LrEdgeFlags edges,
ptrdiff_t mid_stride);
void dav1d_copy_narrow_neon(pixel *dst, ptrdiff_t stride,
const pixel *src, int w, int h);
static void wiener_filter_neon(pixel *const dst, const ptrdiff_t dst_stride,
const pixel (*const left)[4],
const pixel *lpf, const ptrdiff_t lpf_stride,
const int w, const int h, const int16_t fh[7],
const int16_t fv[7], const enum LrEdgeFlags edges)
{
ALIGN_STK_16(int16_t, mid, 68 * 384,);
int mid_stride = (w + 7) & ~7;
// Horizontal filter
dav1d_wiener_filter_h_neon(&mid[2 * mid_stride], left, dst, dst_stride,
fh, w, h, edges);
if (edges & LR_HAVE_TOP)
dav1d_wiener_filter_h_neon(mid, NULL, lpf, lpf_stride,
fh, w, 2, edges);
if (edges & LR_HAVE_BOTTOM)
dav1d_wiener_filter_h_neon(&mid[(2 + h) * mid_stride], NULL,
lpf + 6 * PXSTRIDE(lpf_stride), lpf_stride,
fh, w, 2, edges);
// Vertical filter
if (w >= 8)
dav1d_wiener_filter_v_neon(dst, dst_stride, &mid[2*mid_stride],
w & ~7, h, fv, edges, mid_stride * sizeof(*mid));
if (w & 7) {
// For uneven widths, do a full 8 pixel wide filtering into a temp
// buffer and copy out the narrow slice of pixels separately into dest.
ALIGN_STK_16(pixel, tmp, 64 * 8,);
dav1d_wiener_filter_v_neon(tmp, w & 7, &mid[2*mid_stride + (w & ~7)],
w & 7, h, fv, edges, mid_stride * sizeof(*mid));
dav1d_copy_narrow_neon(dst + (w & ~7), dst_stride, tmp, w & 7, h);
}
}
#if ARCH_AARCH64
void dav1d_sgr_box3_h_neon(int32_t *sumsq, int16_t *sum,
const pixel (*left)[4],
const pixel *src, const ptrdiff_t stride,
const int w, const int h,
const enum LrEdgeFlags edges);
void dav1d_sgr_box3_v_neon(int32_t *sumsq, int16_t *sum,
const int w, const int h,
const enum LrEdgeFlags edges);
void dav1d_sgr_calc_ab1_neon(int32_t *a, int16_t *b,
const int w, const int h, const int strength);
void dav1d_sgr_finish_filter1_neon(coef *tmp,
const pixel *src, const ptrdiff_t stride,
const int32_t *a, const int16_t *b,
const int w, const int h);
/* filter with a 3x3 box (radius=1) */
static void dav1d_sgr_filter1_neon(coef *tmp,
const pixel *src, const ptrdiff_t stride,
const pixel (*left)[4],
const pixel *lpf, const ptrdiff_t lpf_stride,
const int w, const int h, const int strength,
const enum LrEdgeFlags edges)
{
ALIGN_STK_16(int32_t, sumsq_mem, (384 + 16) * 68 + 8,);
int32_t *const sumsq = &sumsq_mem[(384 + 16) * 2 + 8], *const a = sumsq;
ALIGN_STK_16(int16_t, sum_mem, (384 + 16) * 68 + 16,);
int16_t *const sum = &sum_mem[(384 + 16) * 2 + 16], *const b = sum;
dav1d_sgr_box3_h_neon(sumsq, sum, left, src, stride, w, h, edges);
if (edges & LR_HAVE_TOP)
dav1d_sgr_box3_h_neon(&sumsq[-2 * (384 + 16)], &sum[-2 * (384 + 16)],
NULL, lpf, lpf_stride, w, 1, edges);
if (edges & LR_HAVE_BOTTOM)
dav1d_sgr_box3_h_neon(&sumsq[h * (384 + 16)], &sum[h * (384 + 16)],
NULL, lpf + 6 * PXSTRIDE(lpf_stride),
lpf_stride, w, 2, edges);
dav1d_sgr_box3_v_neon(sumsq, sum, w, h, edges);
dav1d_sgr_calc_ab1_neon(a, b, w, h, strength);
dav1d_sgr_finish_filter1_neon(tmp, src, stride, a, b, w, h);
}
void dav1d_sgr_box5_h_neon(int32_t *sumsq, int16_t *sum,
const pixel (*left)[4],
const pixel *src, const ptrdiff_t stride,
const int w, const int h,
const enum LrEdgeFlags edges);
void dav1d_sgr_box5_v_neon(int32_t *sumsq, int16_t *sum,
const int w, const int h,
const enum LrEdgeFlags edges);
void dav1d_sgr_calc_ab2_neon(int32_t *a, int16_t *b,
const int w, const int h, const int strength);
void dav1d_sgr_finish_filter2_neon(coef *tmp,
const pixel *src, const ptrdiff_t stride,
const int32_t *a, const int16_t *b,
const int w, const int h);
/* filter with a 5x5 box (radius=2) */
static void dav1d_sgr_filter2_neon(coef *tmp,
const pixel *src, const ptrdiff_t stride,
const pixel (*left)[4],
const pixel *lpf, const ptrdiff_t lpf_stride,
const int w, const int h, const int strength,
const enum LrEdgeFlags edges)
{
ALIGN_STK_16(int32_t, sumsq_mem, (384 + 16) * 68 + 8,);
int32_t *const sumsq = &sumsq_mem[(384 + 16) * 2 + 8], *const a = sumsq;
ALIGN_STK_16(int16_t, sum_mem, (384 + 16) * 68 + 16,);
int16_t *const sum = &sum_mem[(384 + 16) * 2 + 16], *const b = sum;
dav1d_sgr_box5_h_neon(sumsq, sum, left, src, stride, w, h, edges);
if (edges & LR_HAVE_TOP)
dav1d_sgr_box5_h_neon(&sumsq[-2 * (384 + 16)], &sum[-2 * (384 + 16)],
NULL, lpf, lpf_stride, w, 2, edges);
if (edges & LR_HAVE_BOTTOM)
dav1d_sgr_box5_h_neon(&sumsq[h * (384 + 16)], &sum[h * (384 + 16)],
NULL, lpf + 6 * PXSTRIDE(lpf_stride),
lpf_stride, w, 2, edges);
dav1d_sgr_box5_v_neon(sumsq, sum, w, h, edges);
dav1d_sgr_calc_ab2_neon(a, b, w, h, strength);
dav1d_sgr_finish_filter2_neon(tmp, src, stride, a, b, w, h);
}
void dav1d_sgr_weighted1_neon(pixel *dst, const ptrdiff_t dst_stride,
const pixel *src, const ptrdiff_t src_stride,
const coef *t1, const int w, const int h,
const int wt);
void dav1d_sgr_weighted2_neon(pixel *dst, const ptrdiff_t dst_stride,
const pixel *src, const ptrdiff_t src_stride,
const coef *t1, const coef *t2,
const int w, const int h,
const int16_t wt[2]);
static void sgr_filter_neon(pixel *const dst, const ptrdiff_t dst_stride,
const pixel (*const left)[4],
const pixel *lpf, const ptrdiff_t lpf_stride,
const int w, const int h, const int sgr_idx,
const int16_t sgr_wt[7], const enum LrEdgeFlags edges)
{
if (!dav1d_sgr_params[sgr_idx][0]) {
ALIGN_STK_16(coef, tmp, 64 * 384,);
dav1d_sgr_filter1_neon(tmp, dst, dst_stride, left, lpf, lpf_stride,
w, h, dav1d_sgr_params[sgr_idx][3], edges);
if (w >= 8)
dav1d_sgr_weighted1_neon(dst, dst_stride, dst, dst_stride,
tmp, w & ~7, h, (1 << 7) - sgr_wt[1]);
if (w & 7) {
// For uneven widths, do a full 8 pixel wide filtering into a temp
// buffer and copy out the narrow slice of pixels separately into
// dest.
ALIGN_STK_16(pixel, stripe, 64 * 8,);
dav1d_sgr_weighted1_neon(stripe, w & 7, dst + (w & ~7), dst_stride,
tmp + (w & ~7), w & 7, h,
(1 << 7) - sgr_wt[1]);
dav1d_copy_narrow_neon(dst + (w & ~7), dst_stride, stripe,
w & 7, h);
}
} else if (!dav1d_sgr_params[sgr_idx][1]) {
ALIGN_STK_16(coef, tmp, 64 * 384,);
dav1d_sgr_filter2_neon(tmp, dst, dst_stride, left, lpf, lpf_stride,
w, h, dav1d_sgr_params[sgr_idx][2], edges);
if (w >= 8)
dav1d_sgr_weighted1_neon(dst, dst_stride, dst, dst_stride,
tmp, w & ~7, h, sgr_wt[0]);
if (w & 7) {
// For uneven widths, do a full 8 pixel wide filtering into a temp
// buffer and copy out the narrow slice of pixels separately into
// dest.
ALIGN_STK_16(pixel, stripe, 64 * 8,);
dav1d_sgr_weighted1_neon(stripe, w & 7, dst + (w & ~7), dst_stride,
tmp + (w & ~7), w & 7, h, sgr_wt[0]);
dav1d_copy_narrow_neon(dst + (w & ~7), dst_stride, stripe,
w & 7, h);
}
} else {
ALIGN_STK_16(coef, tmp1, 64 * 384,);
ALIGN_STK_16(coef, tmp2, 64 * 384,);
dav1d_sgr_filter2_neon(tmp1, dst, dst_stride, left, lpf, lpf_stride,
w, h, dav1d_sgr_params[sgr_idx][2], edges);
dav1d_sgr_filter1_neon(tmp2, dst, dst_stride, left, lpf, lpf_stride,
w, h, dav1d_sgr_params[sgr_idx][3], edges);
const int16_t wt[2] = { sgr_wt[0], 128 - sgr_wt[0] - sgr_wt[1] };
if (w >= 8)
dav1d_sgr_weighted2_neon(dst, dst_stride, dst, dst_stride,
tmp1, tmp2, w & ~7, h, wt);
if (w & 7) {
// For uneven widths, do a full 8 pixel wide filtering into a temp
// buffer and copy out the narrow slice of pixels separately into
// dest.
ALIGN_STK_16(pixel, stripe, 64 * 8,);
dav1d_sgr_weighted2_neon(stripe, w & 7, dst + (w & ~7), dst_stride,
tmp1 + (w & ~7), tmp2 + (w & ~7),
w & 7, h, wt);
dav1d_copy_narrow_neon(dst + (w & ~7), dst_stride, stripe,
w & 7, h);
}
}
}
#endif // ARCH_AARCH64
#endif // BITDEPTH == 8
void bitfn(dav1d_loop_restoration_dsp_init_arm)(Dav1dLoopRestorationDSPContext *const c) {
const unsigned flags = dav1d_get_cpu_flags();
if (!(flags & DAV1D_ARM_CPU_FLAG_NEON)) return;
#if BITDEPTH == 8
c->wiener = wiener_filter_neon;
#if ARCH_AARCH64
c->selfguided = sgr_filter_neon;
#endif
#endif
}