ref: 68f6b1775edd008f24803336597c5aac38845763
dir: /src/lr_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 <stdio.h>
#include "common/intops.h"
#include "src/lr_apply.h"
enum LrRestorePlanes {
LR_RESTORE_Y = 1 << 0,
LR_RESTORE_U = 1 << 1,
LR_RESTORE_V = 1 << 2,
};
// The loop filter buffer stores 12 rows of pixels. A superblock block will
// contain at most 2 stripes. Each stripe requires 4 rows pixels (2 above
// and 2 below) the final 4 rows are used to swap the bottom of the last
// stripe with the top of the next super block row.
static void backup_lpf(pixel *dst, ptrdiff_t dst_stride,
const pixel *src, ptrdiff_t src_stride,
const int ss_ver, const int sb128,
int row, const int row_h, const int w)
{
src_stride = PXSTRIDE(src_stride);
dst_stride = PXSTRIDE(dst_stride);
// The first stripe of the frame is shorter by 8 luma pixel rows.
int stripe_h = (64 - 8 * !row) >> ss_ver;
if (row) {
const int top = 4 << sb128;
// Copy the top part of the stored loop filtered pixels from the
// previous sb row needed above the first stripe of this sb row.
pixel_copy(&dst[dst_stride * 0], &dst[dst_stride * top], w);
pixel_copy(&dst[dst_stride * 1], &dst[dst_stride * (top + 1)], w);
pixel_copy(&dst[dst_stride * 2], &dst[dst_stride * (top + 2)], w);
pixel_copy(&dst[dst_stride * 3], &dst[dst_stride * (top + 3)], w);
}
dst += 4 * dst_stride;
src += (stripe_h - 2) * src_stride;
for (; row + stripe_h <= row_h; row += stripe_h) {
for (int i = 0; i < 4; i++) {
pixel_copy(dst, src, w);
dst += dst_stride;
src += src_stride;
}
stripe_h = 64 >> ss_ver;
src += (stripe_h - 4) * src_stride;
}
}
void bytefn(dav1d_lr_copy_lpf)(Dav1dFrameContext *const f,
/*const*/ pixel *const src[3], const int sby)
{
const ptrdiff_t offset = 8 * !!sby;
const ptrdiff_t *const src_stride = f->cur.p.stride;
// TODO Also check block level restore type to reduce copying.
const int restore_planes =
((f->frame_hdr.restoration.type[0] != RESTORATION_NONE) << 0) +
((f->frame_hdr.restoration.type[1] != RESTORATION_NONE) << 1) +
((f->frame_hdr.restoration.type[2] != RESTORATION_NONE) << 2);
if (restore_planes & LR_RESTORE_Y) {
const int h = f->bh << 2;
const int w = f->bw << 2;
const int row_h = imin((sby + 1) << (6 + f->seq_hdr.sb128), h);
const int y_stripe = (sby << (6 + f->seq_hdr.sb128)) - offset;
backup_lpf(f->lf.lr_lpf_line_ptr[0], sizeof(pixel) * f->b4_stride * 4,
src[0] - offset * PXSTRIDE(src_stride[0]), src_stride[0],
0, f->seq_hdr.sb128, y_stripe, row_h, w);
}
if (restore_planes & (LR_RESTORE_U | LR_RESTORE_V)) {
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 h = f->bh << (2 - ss_ver);
const int w = f->bw << (2 - ss_hor);
const int row_h = imin((sby + 1) << ((6 - ss_ver) + f->seq_hdr.sb128), h);
const ptrdiff_t offset_uv = offset >> ss_ver;
const int y_stripe =
(sby << ((6 - ss_ver) + f->seq_hdr.sb128)) - offset_uv;
if (restore_planes & LR_RESTORE_U) {
backup_lpf(f->lf.lr_lpf_line_ptr[1], sizeof(pixel) * f->b4_stride * 4,
src[1] - offset_uv * PXSTRIDE(src_stride[1]), src_stride[1],
ss_ver, f->seq_hdr.sb128, y_stripe, row_h, w);
}
if (restore_planes & LR_RESTORE_V) {
backup_lpf(f->lf.lr_lpf_line_ptr[2], sizeof(pixel) * f->b4_stride * 4,
src[2] - offset_uv * PXSTRIDE(src_stride[1]), src_stride[1],
ss_ver, f->seq_hdr.sb128, y_stripe, row_h, w);
}
}
}
static void lr_stripe(const Dav1dFrameContext *const f, pixel *p,
const pixel (*left)[4], int x, int y,
const int plane, const int unit_w, const int row_h,
const Av1RestorationUnit *const lr, enum LrEdgeFlags edges)
{
const Dav1dDSPContext *const dsp = f->dsp;
const int chroma = !!plane;
const int ss_ver = chroma & (f->cur.p.p.layout == DAV1D_PIXEL_LAYOUT_I420);
const int sbrow_has_bottom = (edges & LR_HAVE_BOTTOM);
const pixel *lpf = f->lf.lr_lpf_line_ptr[plane] + x;
const ptrdiff_t p_stride = f->cur.p.stride[chroma];
const ptrdiff_t lpf_stride = sizeof(pixel) * f->b4_stride * 4;
// The first stripe of the frame is shorter by 8 luma pixel rows.
int stripe_h = imin((64 - 8 * !y) >> ss_ver, row_h - y);
// FIXME [8] might be easier for SIMD
int16_t filterh[7], filterv[7];
if (lr->type == RESTORATION_WIENER) {
filterh[0] = filterh[6] = lr->filter_h[0];
filterh[1] = filterh[5] = lr->filter_h[1];
filterh[2] = filterh[4] = lr->filter_h[2];
filterh[3] = -((filterh[0] + filterh[1] + filterh[2]) * 2);
filterv[0] = filterv[6] = lr->filter_v[0];
filterv[1] = filterv[5] = lr->filter_v[1];
filterv[2] = filterv[4] = lr->filter_v[2];
filterv[3] = -((filterv[0] + filterv[1] + filterv[2]) * 2);
}
while (y + stripe_h <= row_h) {
// TODO Look into getting rid of the this if
if (y + stripe_h == row_h) {
edges &= ~LR_HAVE_BOTTOM;
} else {
edges |= LR_HAVE_BOTTOM;
}
if (lr->type == RESTORATION_WIENER) {
dsp->lr.wiener(p, p_stride, left, lpf, lpf_stride, unit_w, stripe_h,
filterh, filterv, edges);
} else {
assert(lr->type == RESTORATION_SGRPROJ);
dsp->lr.selfguided(p, p_stride, left, lpf, lpf_stride, unit_w, stripe_h,
lr->sgr_idx, lr->sgr_weights, edges);
}
left += stripe_h;
y += stripe_h;
if (y + stripe_h > row_h && sbrow_has_bottom) break;
p += stripe_h * PXSTRIDE(p_stride);
edges |= LR_HAVE_TOP;
stripe_h = imin(64 >> ss_ver, row_h - y);
if (stripe_h == 0) break;
lpf += 4 * PXSTRIDE(lpf_stride);
}
}
static void backup4xU(pixel (*dst)[4], const pixel *src, const ptrdiff_t src_stride,
int u)
{
for (; u > 0; u--, dst++, src += PXSTRIDE(src_stride))
pixel_copy(dst, src, 4);
}
static void lr_sbrow(const Dav1dFrameContext *const f, pixel *p, const int y,
const int w, const int h, const int row_h, const int plane)
{
const int chroma = !!plane;
const int ss_ver = chroma & (f->cur.p.p.layout == DAV1D_PIXEL_LAYOUT_I420);
const int ss_hor = chroma & (f->cur.p.p.layout != DAV1D_PIXEL_LAYOUT_I444);
const ptrdiff_t p_stride = f->cur.p.stride[chroma];
const int unit_size_log2 = f->frame_hdr.restoration.unit_size[!!plane];
const int unit_size = 1 << unit_size_log2;
const int half_unit_size = unit_size >> 1;
const int max_unit_size = unit_size + half_unit_size;
// Y coordinate of the sbrow (y is 8 luma pixel rows above row_y)
const int row_y = y + ((8 >> ss_ver) * !!y);
// FIXME This is an ugly hack to lookup the proper AV1Filter unit for
// chroma planes. Question: For Multithreaded decoding, is it better
// to store the chroma LR information with collocated Luma information?
// In other words. For a chroma restoration unit locate at 128,128 and
// with a 4:2:0 chroma subsampling, do we store the filter information at
// the AV1Filter unit located at (128,128) or (256,256)
// TODO Support chroma subsampling.
const int shift_ver = 7 - ss_ver;
const int shift_hor = 7 - ss_hor;
int ruy = (row_y >> unit_size_log2);
// Merge last restoration unit if its height is < half_unit_size
if (ruy > 0) ruy -= (ruy << unit_size_log2) + half_unit_size > h;
// The first stripe of the frame is shorter by 8 luma pixel rows.
const int filter_h =
imin(((1 << (6 + f->seq_hdr.sb128)) - 8 * !y) >> ss_ver, h - y);
pixel pre_lr_border[2][128 /* maximum sbrow height is 128 */][4];
int unit_w = unit_size, bit = 0;
enum LrEdgeFlags edges = (y > 0 ? LR_HAVE_TOP : 0) |
(row_h < h ? LR_HAVE_BOTTOM : 0);
for (int x = 0, rux = 0; x < w; x+= unit_w, rux++, edges |= LR_HAVE_LEFT, bit ^= 1) {
// TODO Clean up this if statement.
if (x + max_unit_size > w) {
unit_w = w - x;
edges &= ~LR_HAVE_RIGHT;
} else {
edges |= LR_HAVE_RIGHT;
}
// Based on the position of the restoration unit, find the corresponding
// AV1Filter unit.
const int unit_idx = ((ruy & 16) >> 3) + ((rux & 16) >> 4);
const Av1RestorationUnit *const lr =
&f->lf.mask[(((ruy << (unit_size_log2)) >> shift_ver) * f->sb128w) +
(x >> shift_hor)].lr[plane][unit_idx];
// FIXME Don't backup if the next restoration unit is RESTORE_NONE
// This also requires not restoring in the same conditions.
if (edges & LR_HAVE_RIGHT) {
backup4xU(pre_lr_border[bit], p + unit_w - 4, p_stride, filter_h);
}
if (lr->type != RESTORATION_NONE) {
lr_stripe(f, p, pre_lr_border[!bit], x, y, plane, unit_w, row_h, lr, edges);
}
p += unit_w;
}
}
void bytefn(dav1d_lr_sbrow)(Dav1dFrameContext *const f, pixel *const dst[3],
const int sby)
{
const ptrdiff_t offset_y = 8 * !!sby;
const ptrdiff_t *const dst_stride = f->cur.p.stride;
const int restore_planes =
((f->frame_hdr.restoration.type[0] != RESTORATION_NONE) << 0) +
((f->frame_hdr.restoration.type[1] != RESTORATION_NONE) << 1) +
((f->frame_hdr.restoration.type[2] != RESTORATION_NONE) << 2);
if (restore_planes & LR_RESTORE_Y) {
const int h = f->cur.p.p.h;
const int w = f->cur.p.p.w;
const int row_h = imin((sby + 1) << (6 + f->seq_hdr.sb128), h);
const int y_stripe = (sby << (6 + f->seq_hdr.sb128)) - offset_y;
lr_sbrow(f, dst[0] - offset_y * PXSTRIDE(dst_stride[0]), y_stripe, w,
h, row_h, 0);
}
if (restore_planes & (LR_RESTORE_U | LR_RESTORE_V)) {
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 h = (f->cur.p.p.h + ss_ver) >> ss_ver;
const int w = (f->cur.p.p.w + ss_hor) >> ss_hor;
const int row_h = imin((sby + 1) << ((6 - ss_ver) + f->seq_hdr.sb128), h);
const ptrdiff_t offset_uv = offset_y >> ss_ver;
const int y_stripe =
(sby << ((6 - ss_ver) + f->seq_hdr.sb128)) - offset_uv;
if (restore_planes & LR_RESTORE_U)
lr_sbrow(f, dst[1] - offset_uv * PXSTRIDE(dst_stride[1]), y_stripe,
w, h, row_h, 1);
if (restore_planes & LR_RESTORE_V)
lr_sbrow(f, dst[2] - offset_uv * PXSTRIDE(dst_stride[1]), y_stripe,
w, h, row_h, 2);
}
}