ref: 86039b3b1c614d2bec321c8bd45fb7d2d4b6d17d
dir: /src/lf_apply.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 "config.h"
#include <assert.h>
#include <string.h>
#include "common/intops.h"
#include "src/lf_apply.h"
static inline int maxifzero(const uint8_t (*const a)[4], const int have_b,
const uint8_t (*const b)[4], const int diridx)
{
const int a_val = (*a)[diridx];
if (a_val) return a_val;
if (!have_b) return a_val;
return (*b)[diridx];
}
static inline void filter_plane_cols_y(const Dav1dFrameContext *const f,
const int have_left,
const uint8_t (*lvl)[4],
const ptrdiff_t b4_stride,
const uint32_t (*const mask)[3],
pixel *dst, const ptrdiff_t ls,
const int starty4, const int endy4)
{
const Dav1dDSPContext *const dsp = f->dsp;
// filter edges between columns (e.g. block1 | block2)
for (int y = starty4; y < endy4;
y++, dst += 4 * PXSTRIDE(ls), lvl += b4_stride)
{
pixel *ptr = dst;
const uint8_t (*l)[4] = lvl;
const uint32_t *const hmask = mask[y];
const unsigned hm = hmask[0] | hmask[1] | hmask[2];
for (unsigned x = 1; hm & ~(x - 1); l++, x <<= 1, ptr += 4) {
if ((have_left || x > 1) && (hm & x)) {
const int L = maxifzero(l, have_left || x > 1, &l[-1], 0);
if (!L) continue;
const int H = L >> 4;
const int E = f->lf.lim_lut.e[L], I = f->lf.lim_lut.i[L];
const int idx = (hmask[2] & x) ? 2 : !!(hmask[1] & x);
dsp->lf.loop_filter[idx][0](ptr, ls, E, I, H);
}
}
}
}
static inline void filter_plane_rows_y(const Dav1dFrameContext *const f,
const int have_top,
const uint8_t (*lvl)[4],
const ptrdiff_t b4_stride,
const uint32_t (*const mask)[3],
pixel *dst, const ptrdiff_t ls,
const int starty4, const int endy4)
{
const Dav1dDSPContext *const dsp = f->dsp;
// block1
// filter edges between rows (e.g. ------)
// block2
for (int y = starty4; y < endy4;
y++, dst += 4 * PXSTRIDE(ls), lvl += b4_stride)
{
pixel *ptr = dst;
const uint8_t (*l)[4] = lvl;
const uint32_t *const vmask = mask[y];
const unsigned vm = vmask[0] | vmask[1] | vmask[2];
for (unsigned x = 1; vm & ~(x - 1); x <<= 1, ptr += 4, l++) {
if ((have_top || y) && (vm & x)) {
const int L = maxifzero(l, have_top || y, &l[-b4_stride], 1);
if (!L) continue;
const int H = L >> 4;
const int E = f->lf.lim_lut.e[L], I = f->lf.lim_lut.i[L];
const int idx = (vmask[2] & x) ? 2 : !!(vmask[1] & x);
dsp->lf.loop_filter[idx][1](ptr, ls, E, I, H);
}
}
}
}
static inline void filter_plane_cols_uv(const Dav1dFrameContext *const f,
const int have_left,
const uint8_t (*lvl)[4],
const ptrdiff_t b4_stride,
const uint32_t (*const mask)[2],
pixel *const u, pixel *const v,
const ptrdiff_t ls,
const int starty4, const int endy4)
{
const Dav1dDSPContext *const dsp = f->dsp;
int y;
ptrdiff_t off_l;
const int ss_ver = f->cur.p.p.layout == DAV1D_PIXEL_LAYOUT_I420;
const int ss_hor = f->cur.p.p.layout != DAV1D_PIXEL_LAYOUT_I444;
const int hstep = 1 << ss_hor;
// filter edges between columns (e.g. block1 | block2)
lvl += ss_hor + ss_ver * b4_stride;
for (off_l = 0, y = starty4; y < endy4;
y++, off_l += 4 * PXSTRIDE(ls), lvl += b4_stride << ss_ver)
{
ptrdiff_t off = off_l;
const uint8_t (*l)[4] = lvl;
const uint32_t *const hmask = mask[y];
const unsigned hm = hmask[0] | hmask[1];
for (unsigned x = 1; hm & ~(x - 1); l += hstep, x <<= 1, off += 4) {
if ((have_left || x > 1) && (hm & x)) {
const int idx = !!(hmask[1] & x);
const int Lu = maxifzero(l, have_left || x > 1, &l[-hstep], 2);
if (Lu) {
const int H = Lu >> 4;
const int E = f->lf.lim_lut.e[Lu], I = f->lf.lim_lut.i[Lu];
dsp->lf.loop_filter_uv[idx][0](&u[off], ls, E, I, H);
}
const int Lv = maxifzero(l, have_left || x > 1, &l[-hstep], 3);
if (Lv) {
const int H = Lv >> 4;
const int E = f->lf.lim_lut.e[Lv], I = f->lf.lim_lut.i[Lv];
dsp->lf.loop_filter_uv[idx][0](&v[off], ls, E, I, H);
}
}
}
}
}
static inline void filter_plane_rows_uv(const Dav1dFrameContext *const f,
const int have_top,
const uint8_t (*lvl)[4],
const ptrdiff_t b4_stride,
const uint32_t (*const mask)[2],
pixel *const u, pixel *const v,
const ptrdiff_t ls,
const int starty4, const int endy4)
{
const Dav1dDSPContext *const dsp = f->dsp;
int y;
ptrdiff_t off_l;
const int ss_ver = f->cur.p.p.layout == DAV1D_PIXEL_LAYOUT_I420;
const int ss_hor = f->cur.p.p.layout != DAV1D_PIXEL_LAYOUT_I444;
const int hstep = 1 << ss_hor;
// block1
// filter edges between rows (e.g. ------)
// block2
lvl += ss_ver * b4_stride + ss_hor;
for (off_l = 0, y = starty4; y < endy4;
y++, off_l += 4 * PXSTRIDE(ls), lvl += b4_stride << ss_ver)
{
ptrdiff_t off = off_l;
const uint8_t (*l)[4] = lvl;
const uint32_t *const vmask = mask[y];
const unsigned vm = vmask[0] | vmask[1];
for (unsigned x = 1; vm & ~(x - 1); x <<= 1, off += 4, l += hstep) {
if ((have_top || y) && (vm & x)) {
const int idx = !!(vmask[1] & x);
const int Lu = maxifzero(l, have_top || y,
&l[-(b4_stride << ss_ver)], 2);
if (Lu) {
const int H = Lu >> 4;
const int E = f->lf.lim_lut.e[Lu], I = f->lf.lim_lut.i[Lu];
dsp->lf.loop_filter_uv[idx][1](&u[off], ls, E, I, H);
}
const int Lv = maxifzero(l, have_top || y,
&l[-(b4_stride << ss_ver)], 3);
if (Lv) {
const int H = Lv >> 4;
const int E = f->lf.lim_lut.e[Lv], I = f->lf.lim_lut.i[Lv];
dsp->lf.loop_filter_uv[idx][1](&v[off], ls, E, I, H);
}
}
}
}
}
void bytefn(dav1d_loopfilter_sbrow)(const Dav1dFrameContext *const f,
pixel *const p[3], Av1Filter *const lflvl,
int sby, const int start_of_tile_row)
{
int x, have_left;
// Don't filter outside the frame
const int hy4 = (f->cur.p.p.h + 3) >> 2;
const int have_top = sby > 0;
const int is_sb64 = !f->seq_hdr.sb128;
const int starty4 = (sby & is_sb64) << 4;
const int sbsz = 32 >> is_sb64;
const int sbl2 = 5 - is_sb64;
const int halign = (f->bh + 31) & ~31;
const int ss_ver = f->cur.p.p.layout == DAV1D_PIXEL_LAYOUT_I420;
const int ss_hor = f->cur.p.p.layout != DAV1D_PIXEL_LAYOUT_I444;
const int endy4 = starty4 + imin(hy4 - sby * f->sb_step, sbsz);
const int uv_endy4 = (endy4 + ss_ver) >> ss_ver;
// fix lpf strength at tile col boundaries
const uint8_t *lpf_y = &f->lf.tx_lpf_right_edge[0][sby << sbl2];
const uint8_t *lpf_uv = &f->lf.tx_lpf_right_edge[1][sby << (sbl2 - ss_ver)];
for (int tile_col = 1;; tile_col++) {
x = f->frame_hdr.tiling.col_start_sb[tile_col];
if ((x << sbl2) >= f->bw) break;
const int mask = x & is_sb64 ? 1 << 16 : 1;
const int uv_mask = x & is_sb64 ? 1 << (16 >> ss_hor) : 1;
x >>= is_sb64;
for (int y = starty4; y < endy4; y++) {
const int idx = 2 * !!(lflvl[x].filter_y[0][y][2] & mask) +
!!(lflvl[x].filter_y[0][y][1] & mask);
lflvl[x].filter_y[0][y][2] &= ~mask;
lflvl[x].filter_y[0][y][1] &= ~mask;
lflvl[x].filter_y[0][y][0] &= ~mask;
lflvl[x].filter_y[0][y][imin(idx, lpf_y[y - starty4])] |= mask;
}
for (int y = starty4 >> ss_ver; y < uv_endy4; y++) {
const int idx = !!(lflvl[x].filter_uv[0][y][1] & uv_mask);
lflvl[x].filter_uv[0][y][1] &= ~uv_mask;
lflvl[x].filter_uv[0][y][0] &= ~uv_mask;
lflvl[x].filter_uv[0][y][imin(idx, lpf_uv[y - (starty4 >> ss_ver)])] |= uv_mask;
}
lpf_y += halign;
lpf_uv += halign >> ss_ver;
}
// fix lpf strength at tile row boundaries
if (start_of_tile_row) {
const BlockContext *a;
for (x = 0, a = &f->a[f->sb128w * (start_of_tile_row - 1)];
x < f->sb128w; x++, a++)
{
uint32_t *const y_vmask = lflvl[x].filter_y[1][starty4];
const unsigned y_vm = y_vmask[0] | y_vmask[1] | y_vmask[2];
for (unsigned mask = 1, i = 0; i < 32; mask <<= 1, i++) {
if (!(y_vm & mask)) continue;
const int idx = 2 * !!(y_vmask[2] & mask) + !!(y_vmask[1] & mask);
y_vmask[2] &= ~mask;
y_vmask[1] &= ~mask;
y_vmask[0] &= ~mask;
y_vmask[imin(idx, a->tx_lpf_y[i])] |= mask;
}
uint32_t *const uv_vmask = lflvl[x].filter_uv[1][starty4 >> ss_ver];
const unsigned uv_vm = uv_vmask[0] | uv_vmask[1];
for (unsigned mask = 1, i = 0; i < (32 >> ss_hor); mask <<= 1, i++) {
if (!(uv_vm & mask)) continue;
const int idx = !!(uv_vmask[1] & mask);
uv_vmask[1] &= ~mask;
uv_vmask[0] &= ~mask;
uv_vmask[imin(idx, a->tx_lpf_uv[i])] |= mask;
}
}
}
pixel *ptr;
uint8_t (*level_ptr)[4] = f->lf.level + f->b4_stride * sby * sbsz;
for (ptr = p[0], have_left = 0, x = 0; x < f->sb128w;
x++, have_left = 1, ptr += 128, level_ptr += 32)
{
filter_plane_cols_y(f, have_left, level_ptr, f->b4_stride,
lflvl[x].filter_y[0],
ptr, f->cur.p.stride[0], starty4, endy4);
}
level_ptr = f->lf.level + f->b4_stride * sby * sbsz;
for (ptr = p[0], x = 0; x < f->sb128w; x++, ptr += 128, level_ptr += 32) {
filter_plane_rows_y(f, have_top, level_ptr, f->b4_stride,
lflvl[x].filter_y[1],
ptr, f->cur.p.stride[0], starty4, endy4);
}
if (!f->frame_hdr.loopfilter.level_u && !f->frame_hdr.loopfilter.level_v)
return;
ptrdiff_t uv_off;
level_ptr = f->lf.level + f->b4_stride * sby * sbsz;
for (uv_off = 0, have_left = 0, x = 0; x < f->sb128w;
x++, have_left = 1, uv_off += 128 >> ss_hor, level_ptr += 32)
{
filter_plane_cols_uv(f, have_left, level_ptr, f->b4_stride,
lflvl[x].filter_uv[0],
&p[1][uv_off], &p[2][uv_off], f->cur.p.stride[1],
starty4 >> ss_ver, uv_endy4);
}
level_ptr = f->lf.level + f->b4_stride * sby * sbsz;
for (uv_off = 0, x = 0; x < f->sb128w;
x++, uv_off += 128 >> ss_hor, level_ptr += 32)
{
filter_plane_rows_uv(f, have_top, level_ptr, f->b4_stride,
lflvl[x].filter_uv[1],
&p[1][uv_off], &p[2][uv_off], f->cur.p.stride[1],
starty4 >> ss_ver, uv_endy4);
}
}