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FFmpeg/libavcodec/vvc/vvc_inter.c
Frank Plowman 8157b5d405 lavc/vvc: Remove left shifts of negative values 
VVC specifies << as arithmetic left shift, i.e. x << y is equivalent to
x * pow2(y).  C's << on the other hand has UB if x is negative.  This
patch removes all UB resulting from this, mostly by replacing x << y
with x * (1 << y), but there are also a couple places where the OOP was
changed instead.

Signed-off-by: Frank Plowman <post@frankplowman.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2024-01-23 11:17:05 -03:00

924 lines
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/*
* VVC inter prediction
*
* Copyright (C) 2022 Nuo Mi
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/frame.h"
#include "vvc_data.h"
#include "vvc_inter.h"
#include "vvc_mvs.h"
#include "vvc_refs.h"
// +1 is enough, + 32 for asm alignment
#define PROF_TEMP_OFFSET (MAX_PB_SIZE + 32)
static const int bcw_w_lut[] = {4, 5, 3, 10, -2};
static int emulated_edge(const VVCFrameContext *fc, uint8_t *dst, const uint8_t **src, ptrdiff_t *src_stride,
const int x_off, const int y_off, const int block_w, const int block_h, const int is_luma)
{
const int extra_before = is_luma ? LUMA_EXTRA_BEFORE : CHROMA_EXTRA_BEFORE;
const int extra_after = is_luma ? LUMA_EXTRA_AFTER : CHROMA_EXTRA_AFTER;
const int extra = is_luma ? LUMA_EXTRA : CHROMA_EXTRA;
const int pic_width = is_luma ? fc->ps.pps->width : (fc->ps.pps->width >> fc->ps.sps->hshift[1]);
const int pic_height = is_luma ? fc->ps.pps->height : (fc->ps.pps->height >> fc->ps.sps->vshift[1]);
if (x_off < extra_before || y_off < extra_before ||
x_off >= pic_width - block_w - extra_after ||
y_off >= pic_height - block_h - extra_after) {
const ptrdiff_t edge_emu_stride = EDGE_EMU_BUFFER_STRIDE << fc->ps.sps->pixel_shift;
int offset = extra_before * *src_stride + (extra_before << fc->ps.sps->pixel_shift);
int buf_offset = extra_before * edge_emu_stride + (extra_before << fc->ps.sps->pixel_shift);
fc->vdsp.emulated_edge_mc(dst, *src - offset, edge_emu_stride, *src_stride,
block_w + extra, block_h + extra, x_off - extra_before, y_off - extra_before,
pic_width, pic_height);
*src = dst + buf_offset;
*src_stride = edge_emu_stride;
return 1;
}
return 0;
}
static void emulated_edge_dmvr(const VVCFrameContext *fc, uint8_t *dst, const uint8_t **src, ptrdiff_t *src_stride,
const int x_sb, const int y_sb, const int x_off, const int y_off, const int block_w, const int block_h, const int is_luma)
{
const int extra_before = is_luma ? LUMA_EXTRA_BEFORE : CHROMA_EXTRA_BEFORE;
const int extra_after = is_luma ? LUMA_EXTRA_AFTER : CHROMA_EXTRA_AFTER;
const int extra = is_luma ? LUMA_EXTRA : CHROMA_EXTRA;
const int pic_width = is_luma ? fc->ps.pps->width : (fc->ps.pps->width >> fc->ps.sps->hshift[1]);
const int pic_height = is_luma ? fc->ps.pps->height : (fc->ps.pps->height >> fc->ps.sps->vshift[1]);
if (x_off < extra_before || y_off < extra_before ||
x_off >= pic_width - block_w - extra_after ||
y_off >= pic_height - block_h - extra_after||
(x_off != x_sb || y_off != y_sb)) {
const int ps = fc->ps.sps->pixel_shift;
const ptrdiff_t edge_emu_stride = EDGE_EMU_BUFFER_STRIDE << ps;
const int offset = extra_before * *src_stride + (extra_before << ps);
const int buf_offset = extra_before * edge_emu_stride + (extra_before << ps);
const int start_x = FFMIN(FFMAX(x_sb - extra_before, 0), pic_width - 1);
const int start_y = FFMIN(FFMAX(y_sb - extra_before, 0), pic_height - 1);
const int width = FFMAX(FFMIN(pic_width, x_sb + block_w + extra_after) - start_x, 1);
const int height = FFMAX(FFMIN(pic_height, y_sb + block_h + extra_after) - start_y, 1);
fc->vdsp.emulated_edge_mc(dst, *src - offset, edge_emu_stride, *src_stride, block_w + extra, block_h + extra,
x_off - start_x - extra_before, y_off - start_y - extra_before, width, height);
*src = dst + buf_offset;
*src_stride = edge_emu_stride;
}
}
static void emulated_edge_bilinear(const VVCFrameContext *fc, uint8_t *dst, const uint8_t **src, ptrdiff_t *src_stride,
const int x_off, const int y_off, const int block_w, const int block_h)
{
int pic_width = fc->ps.pps->width;
int pic_height = fc->ps.pps->height;
if (x_off < BILINEAR_EXTRA_BEFORE || y_off < BILINEAR_EXTRA_BEFORE ||
x_off >= pic_width - block_w - BILINEAR_EXTRA_AFTER ||
y_off >= pic_height - block_h - BILINEAR_EXTRA_AFTER) {
const ptrdiff_t edge_emu_stride = EDGE_EMU_BUFFER_STRIDE << fc->ps.sps->pixel_shift;
const int offset = BILINEAR_EXTRA_BEFORE * *src_stride + (BILINEAR_EXTRA_BEFORE << fc->ps.sps->pixel_shift);
const int buf_offset = BILINEAR_EXTRA_BEFORE * edge_emu_stride + (BILINEAR_EXTRA_BEFORE << fc->ps.sps->pixel_shift);
fc->vdsp.emulated_edge_mc(dst, *src - offset, edge_emu_stride, *src_stride, block_w + BILINEAR_EXTRA, block_h + BILINEAR_EXTRA,
x_off - BILINEAR_EXTRA_BEFORE, y_off - BILINEAR_EXTRA_BEFORE, pic_width, pic_height);
*src = dst + buf_offset;
*src_stride = edge_emu_stride;
}
}
#define EMULATED_EDGE_LUMA(dst, src, src_stride, x_off, y_off) \
emulated_edge(fc, dst, src, src_stride, x_off, y_off, block_w, block_h, 1)
#define EMULATED_EDGE_CHROMA(dst, src, src_stride, x_off, y_off) \
emulated_edge(fc, dst, src, src_stride, x_off, y_off, block_w, block_h, 0)
#define EMULATED_EDGE_DMVR_LUMA(dst, src, src_stride, x_sb, y_sb, x_off, y_off) \
emulated_edge_dmvr(fc, dst, src, src_stride, x_sb, y_sb, x_off, y_off, block_w, block_h, 1)
#define EMULATED_EDGE_DMVR_CHROMA(dst, src, src_stride, x_sb, y_sb, x_off, y_off) \
emulated_edge_dmvr(fc, dst, src, src_stride, x_sb, y_sb, x_off, y_off, block_w, block_h, 0)
#define EMULATED_EDGE_BILINEAR(dst, src, src_stride, x_off, y_off) \
emulated_edge_bilinear(fc, dst, src, src_stride, x_off, y_off, pred_w, pred_h)
// part of 8.5.6.6 Weighted sample prediction process
static int derive_weight_uni(int *denom, int *wx, int *ox,
const VVCLocalContext *lc, const MvField *mvf, const int c_idx)
{
const VVCFrameContext *fc = lc->fc;
const VVCPPS *pps = fc->ps.pps;
const VVCSH *sh = &lc->sc->sh;
const int weight_flag = (IS_P(sh->r) && pps->r->pps_weighted_pred_flag) ||
(IS_B(sh->r) && pps->r->pps_weighted_bipred_flag);
if (weight_flag) {
const int lx = mvf->pred_flag - PF_L0;
const PredWeightTable *w = pps->r->pps_wp_info_in_ph_flag ? &fc->ps.ph.pwt : &sh->pwt;
*denom = w->log2_denom[c_idx > 0];
*wx = w->weight[lx][c_idx][mvf->ref_idx[lx]];
*ox = w->offset[lx][c_idx][mvf->ref_idx[lx]];
}
return weight_flag;
}
// part of 8.5.6.6 Weighted sample prediction process
static int derive_weight(int *denom, int *w0, int *w1, int *o0, int *o1,
const VVCLocalContext *lc, const MvField *mvf, const int c_idx, const int dmvr_flag)
{
const VVCFrameContext *fc = lc->fc;
const VVCPPS *pps = fc->ps.pps;
const VVCSH *sh = &lc->sc->sh;
const int bcw_idx = mvf->bcw_idx;
const int weight_flag = (IS_P(sh->r) && pps->r->pps_weighted_pred_flag) ||
(IS_B(sh->r) && pps->r->pps_weighted_bipred_flag && !dmvr_flag);
if ((!weight_flag && !bcw_idx) || (bcw_idx && lc->cu->ciip_flag))
return 0;
if (bcw_idx) {
*denom = 2;
*w1 = bcw_w_lut[bcw_idx];
*w0 = 8 - *w1;
*o0 = *o1 = 0;
} else {
const VVCPPS *pps = fc->ps.pps;
const PredWeightTable *w = pps->r->pps_wp_info_in_ph_flag ? &fc->ps.ph.pwt : &sh->pwt;
*denom = w->log2_denom[c_idx > 0];
*w0 = w->weight[L0][c_idx][mvf->ref_idx[L0]];
*w1 = w->weight[L1][c_idx][mvf->ref_idx[L1]];
*o0 = w->offset[L0][c_idx][mvf->ref_idx[L0]];
*o1 = w->offset[L1][c_idx][mvf->ref_idx[L1]];
}
return 1;
}
static void luma_mc(VVCLocalContext *lc, int16_t *dst, const AVFrame *ref, const Mv *mv,
int x_off, int y_off, const int block_w, const int block_h)
{
const VVCFrameContext *fc = lc->fc;
const uint8_t *src = ref->data[0];
ptrdiff_t src_stride = ref->linesize[0];
const int idx = av_log2(block_w) - 1;
const int mx = mv->x & 0xf;
const int my = mv->y & 0xf;
const int8_t *hf = ff_vvc_inter_luma_filters[0][mx];
const int8_t *vf = ff_vvc_inter_luma_filters[0][my];
x_off += mv->x >> 4;
y_off += mv->y >> 4;
src += y_off * src_stride + (x_off * (1 << fc->ps.sps->pixel_shift));
EMULATED_EDGE_LUMA(lc->edge_emu_buffer, &src, &src_stride, x_off, y_off);
fc->vvcdsp.inter.put[LUMA][idx][!!my][!!mx](dst, src, src_stride, block_h, hf, vf, block_w);
}
static void chroma_mc(VVCLocalContext *lc, int16_t *dst, const AVFrame *ref, const Mv *mv,
int x_off, int y_off, const int block_w, const int block_h, const int c_idx)
{
const VVCFrameContext *fc = lc->fc;
const uint8_t *src = ref->data[c_idx];
ptrdiff_t src_stride = ref->linesize[c_idx];
int hs = fc->ps.sps->hshift[c_idx];
int vs = fc->ps.sps->vshift[c_idx];
const int idx = av_log2(block_w) - 1;
const intptr_t mx = av_mod_uintp2(mv->x, 4 + hs) << (1 - hs);
const intptr_t my = av_mod_uintp2(mv->y, 4 + vs) << (1 - vs);
const int8_t *hf = ff_vvc_inter_chroma_filters[0][mx];
const int8_t *vf = ff_vvc_inter_chroma_filters[0][my];
x_off += mv->x >> (4 + hs);
y_off += mv->y >> (4 + vs);
src += y_off * src_stride + (x_off * (1 << fc->ps.sps->pixel_shift));
EMULATED_EDGE_CHROMA(lc->edge_emu_buffer, &src, &src_stride, x_off, y_off);
fc->vvcdsp.inter.put[CHROMA][idx][!!my][!!mx](dst, src, src_stride, block_h, hf, vf, block_w);
}
static void luma_mc_uni(VVCLocalContext *lc, uint8_t *dst, const ptrdiff_t dst_stride,
const AVFrame *ref, const MvField *mvf, int x_off, int y_off, const int block_w, const int block_h,
const int hf_idx, const int vf_idx)
{
const VVCFrameContext *fc = lc->fc;
const int lx = mvf->pred_flag - PF_L0;
const Mv *mv = mvf->mv + lx;
const uint8_t *src = ref->data[0];
ptrdiff_t src_stride = ref->linesize[0];
const int idx = av_log2(block_w) - 1;
const int mx = mv->x & 0xf;
const int my = mv->y & 0xf;
const int8_t *hf = ff_vvc_inter_luma_filters[hf_idx][mx];
const int8_t *vf = ff_vvc_inter_luma_filters[vf_idx][my];
int denom, wx, ox;
x_off += mv->x >> 4;
y_off += mv->y >> 4;
src += y_off * src_stride + (x_off * (1 << fc->ps.sps->pixel_shift));
EMULATED_EDGE_LUMA(lc->edge_emu_buffer, &src, &src_stride, x_off, y_off);
if (derive_weight_uni(&denom, &wx, &ox, lc, mvf, LUMA)) {
fc->vvcdsp.inter.put_uni_w[LUMA][idx][!!my][!!mx](dst, dst_stride, src, src_stride,
block_h, denom, wx, ox, hf, vf, block_w);
} else {
fc->vvcdsp.inter.put_uni[LUMA][idx][!!my][!!mx](dst, dst_stride, src, src_stride,
block_h, hf, vf, block_w);
}
}
static void luma_mc_bi(VVCLocalContext *lc, uint8_t *dst, const ptrdiff_t dst_stride,
const AVFrame *ref0, const Mv *mv0, const int x_off, const int y_off, const int block_w, const int block_h,
const AVFrame *ref1, const Mv *mv1, const MvField *mvf, const int hf_idx, const int vf_idx,
const MvField *orig_mv, const int sb_bdof_flag)
{
const VVCFrameContext *fc = lc->fc;
const PredictionUnit *pu = &lc->cu->pu;
const int idx = av_log2(block_w) - 1;
const AVFrame *ref[] = { ref0, ref1 };
int16_t *tmp[] = { lc->tmp + sb_bdof_flag * PROF_TEMP_OFFSET, lc->tmp1 + sb_bdof_flag * PROF_TEMP_OFFSET };
int denom, w0, w1, o0, o1;
const int weight_flag = derive_weight(&denom, &w0, &w1, &o0, &o1, lc, mvf, LUMA, pu->dmvr_flag);
for (int i = L0; i <= L1; i++) {
const Mv *mv = mvf->mv + i;
const int mx = mv->x & 0xf;
const int my = mv->y & 0xf;
const int ox = x_off + (mv->x >> 4);
const int oy = y_off + (mv->y >> 4);
ptrdiff_t src_stride = ref[i]->linesize[0];
const uint8_t *src = ref[i]->data[0] + oy * src_stride + (ox * (1 << fc->ps.sps->pixel_shift));
const int8_t *hf = ff_vvc_inter_luma_filters[hf_idx][mx];
const int8_t *vf = ff_vvc_inter_luma_filters[vf_idx][my];
if (pu->dmvr_flag) {
const int x_sb = x_off + (orig_mv->mv[i].x >> 4);
const int y_sb = y_off + (orig_mv->mv[i].y >> 4);
EMULATED_EDGE_DMVR_LUMA(lc->edge_emu_buffer, &src, &src_stride, x_sb, y_sb, ox, oy);
} else {
EMULATED_EDGE_LUMA(lc->edge_emu_buffer, &src, &src_stride, ox, oy);
}
fc->vvcdsp.inter.put[LUMA][idx][!!my][!!mx](tmp[i], src, src_stride, block_h, hf, vf, block_w);
if (sb_bdof_flag)
fc->vvcdsp.inter.bdof_fetch_samples(tmp[i], src, src_stride, mx, my, block_w, block_h);
}
if (sb_bdof_flag)
fc->vvcdsp.inter.apply_bdof(dst, dst_stride, tmp[L0], tmp[L1], block_w, block_h);
else if (weight_flag)
fc->vvcdsp.inter.w_avg(dst, dst_stride, tmp[L0], tmp[L1], block_w, block_h, denom, w0, w1, o0, o1);
else
fc->vvcdsp.inter.avg(dst, dst_stride, tmp[L0], tmp[L1], block_w, block_h);
}
static void chroma_mc_uni(VVCLocalContext *lc, uint8_t *dst, const ptrdiff_t dst_stride,
const uint8_t *src, ptrdiff_t src_stride, int x_off, int y_off,
const int block_w, const int block_h, const MvField *mvf, const int c_idx,
const int hf_idx, const int vf_idx)
{
const VVCFrameContext *fc = lc->fc;
const int lx = mvf->pred_flag - PF_L0;
const int hs = fc->ps.sps->hshift[1];
const int vs = fc->ps.sps->vshift[1];
const int idx = av_log2(block_w) - 1;
const Mv *mv = &mvf->mv[lx];
const intptr_t mx = av_mod_uintp2(mv->x, 4 + hs) << (1 - hs);
const intptr_t my = av_mod_uintp2(mv->y, 4 + vs) << (1 - vs);
const int8_t *hf = ff_vvc_inter_chroma_filters[hf_idx][mx];
const int8_t *vf = ff_vvc_inter_chroma_filters[vf_idx][my];
int denom, wx, ox;
x_off += mv->x >> (4 + hs);
y_off += mv->y >> (4 + vs);
src += y_off * src_stride + (x_off * (1 << fc->ps.sps->pixel_shift));
EMULATED_EDGE_CHROMA(lc->edge_emu_buffer, &src, &src_stride, x_off, y_off);
if (derive_weight_uni(&denom, &wx, &ox, lc, mvf, c_idx)) {
fc->vvcdsp.inter.put_uni_w[CHROMA][idx][!!my][!!mx](dst, dst_stride, src, src_stride,
block_h, denom, wx, ox, hf, vf, block_w);
} else {
fc->vvcdsp.inter.put_uni[CHROMA][idx][!!my][!!mx](dst, dst_stride, src, src_stride,
block_h, hf, vf, block_w);
}
}
static void chroma_mc_bi(VVCLocalContext *lc, uint8_t *dst, const ptrdiff_t dst_stride,
const AVFrame *ref0, const AVFrame *ref1, const int x_off, const int y_off,
const int block_w, const int block_h, const MvField *mvf, const int c_idx,
const int hf_idx, const int vf_idx, const MvField *orig_mv, const int dmvr_flag, const int ciip_flag)
{
const VVCFrameContext *fc = lc->fc;
const int hs = fc->ps.sps->hshift[1];
const int vs = fc->ps.sps->vshift[1];
const int idx = av_log2(block_w) - 1;
const AVFrame *ref[] = { ref0, ref1 };
int16_t *tmp[] = { lc->tmp, lc->tmp1 };
int denom, w0, w1, o0, o1;
const int weight_flag = derive_weight(&denom, &w0, &w1, &o0, &o1, lc, mvf, c_idx, dmvr_flag);
for (int i = L0; i <= L1; i++) {
const Mv *mv = mvf->mv + i;
const int mx = av_mod_uintp2(mv->x, 4 + hs) << (1 - hs);
const int my = av_mod_uintp2(mv->y, 4 + vs) << (1 - vs);
const int ox = x_off + (mv->x >> (4 + hs));
const int oy = y_off + (mv->y >> (4 + vs));
ptrdiff_t src_stride = ref[i]->linesize[c_idx];
const uint8_t *src = ref[i]->data[c_idx] + oy * src_stride + (ox * (1 << fc->ps.sps->pixel_shift));
const int8_t *hf = ff_vvc_inter_chroma_filters[hf_idx][mx];
const int8_t *vf = ff_vvc_inter_chroma_filters[vf_idx][my];
if (dmvr_flag) {
const int x_sb = x_off + (orig_mv->mv[i].x >> (4 + hs));
const int y_sb = y_off + (orig_mv->mv[i].y >> (4 + vs));
EMULATED_EDGE_DMVR_CHROMA(lc->edge_emu_buffer, &src, &src_stride, x_sb, y_sb, ox, oy);
} else {
EMULATED_EDGE_CHROMA(lc->edge_emu_buffer, &src, &src_stride, ox, oy);
}
fc->vvcdsp.inter.put[CHROMA][idx][!!my][!!mx](tmp[i], src, src_stride, block_h, hf, vf, block_w);
}
if (weight_flag)
fc->vvcdsp.inter.w_avg(dst, dst_stride, tmp[L0], tmp[L1], block_w, block_h, denom, w0, w1, o0, o1);
else
fc->vvcdsp.inter.avg(dst, dst_stride, tmp[L0], tmp[L1], block_w, block_h);
}
static void luma_prof_uni(VVCLocalContext *lc, uint8_t *dst, const ptrdiff_t dst_stride,
const AVFrame *ref, const MvField *mvf, int x_off, int y_off, const int block_w, const int block_h,
const int cb_prof_flag, const int16_t *diff_mv_x, const int16_t *diff_mv_y)
{
const VVCFrameContext *fc = lc->fc;
const uint8_t *src = ref->data[0];
ptrdiff_t src_stride = ref->linesize[0];
uint16_t *prof_tmp = lc->tmp + PROF_TEMP_OFFSET;
const int idx = av_log2(block_w) - 1;
const int lx = mvf->pred_flag - PF_L0;
const Mv *mv = mvf->mv + lx;
const int mx = mv->x & 0xf;
const int my = mv->y & 0xf;
const int8_t *hf = ff_vvc_inter_luma_filters[2][mx];
const int8_t *vf = ff_vvc_inter_luma_filters[2][my];
int denom, wx, ox;
const int weight_flag = derive_weight_uni(&denom, &wx, &ox, lc, mvf, LUMA);
x_off += mv->x >> 4;
y_off += mv->y >> 4;
src += y_off * src_stride + (x_off * (1 << fc->ps.sps->pixel_shift));
EMULATED_EDGE_LUMA(lc->edge_emu_buffer, &src, &src_stride, x_off, y_off);
if (cb_prof_flag) {
fc->vvcdsp.inter.put[LUMA][idx][!!my][!!mx](prof_tmp, src, src_stride, AFFINE_MIN_BLOCK_SIZE, hf, vf, AFFINE_MIN_BLOCK_SIZE);
fc->vvcdsp.inter.fetch_samples(prof_tmp, src, src_stride, mx, my);
if (!weight_flag)
fc->vvcdsp.inter.apply_prof_uni(dst, dst_stride, prof_tmp, diff_mv_x, diff_mv_y);
else
fc->vvcdsp.inter.apply_prof_uni_w(dst, dst_stride, prof_tmp, diff_mv_x, diff_mv_y, denom, wx, ox);
} else {
if (!weight_flag)
fc->vvcdsp.inter.put_uni[LUMA][idx][!!my][!!mx](dst, dst_stride, src, src_stride, block_h, hf, vf, block_w);
else
fc->vvcdsp.inter.put_uni_w[LUMA][idx][!!my][!!mx](dst, dst_stride, src, src_stride, block_h, denom, wx, ox, hf, vf, block_w);
}
}
static void luma_prof_bi(VVCLocalContext *lc, uint8_t *dst, const ptrdiff_t dst_stride,
const AVFrame *ref0, const AVFrame *ref1, const MvField *mvf, const int x_off, const int y_off,
const int block_w, const int block_h)
{
const VVCFrameContext *fc = lc->fc;
const PredictionUnit *pu = &lc->cu->pu;
const AVFrame *ref[] = { ref0, ref1 };
int16_t *tmp[] = { lc->tmp, lc->tmp1 };
uint16_t *prof_tmp = lc->tmp2 + PROF_TEMP_OFFSET;
const int idx = av_log2(block_w) - 1;
int denom, w0, w1, o0, o1;
const int weight_flag = derive_weight(&denom, &w0, &w1, &o0, &o1, lc, mvf, LUMA, 0);
for (int i = L0; i <= L1; i++) {
const Mv *mv = mvf->mv + i;
const int mx = mv->x & 0xf;
const int my = mv->y & 0xf;
const int ox = x_off + (mv->x >> 4);
const int oy = y_off + (mv->y >> 4);
ptrdiff_t src_stride = ref[i]->linesize[0];
const uint8_t *src = ref[i]->data[0] + oy * src_stride + (ox * (1 << fc->ps.sps->pixel_shift));
const int8_t *hf = ff_vvc_inter_luma_filters[2][mx];
const int8_t *vf = ff_vvc_inter_luma_filters[2][my];
EMULATED_EDGE_LUMA(lc->edge_emu_buffer, &src, &src_stride, ox, oy);
if (!pu->cb_prof_flag[i]) {
fc->vvcdsp.inter.put[LUMA][idx][!!my][!!mx](tmp[i], src, src_stride, block_h, hf, vf, block_w);
} else {
fc->vvcdsp.inter.put[LUMA][idx][!!my][!!mx](prof_tmp, src, src_stride, AFFINE_MIN_BLOCK_SIZE, hf, vf, AFFINE_MIN_BLOCK_SIZE);
fc->vvcdsp.inter.fetch_samples(prof_tmp, src, src_stride, mx, my);
fc->vvcdsp.inter.apply_prof(tmp[i], prof_tmp, pu->diff_mv_x[i], pu->diff_mv_y[i]);
}
}
if (weight_flag)
fc->vvcdsp.inter.w_avg(dst, dst_stride, tmp[L0], tmp[L1], block_w, block_h, denom, w0, w1, o0, o1);
else
fc->vvcdsp.inter.avg(dst, dst_stride, tmp[L0], tmp[L1], block_w, block_h);
}
static int pred_get_refs(const VVCLocalContext *lc, VVCFrame *ref[2], const MvField *mv)
{
const RefPicList *rpl = lc->sc->rpl;
for (int mask = PF_L0; mask <= PF_L1; mask++) {
if (mv->pred_flag & mask) {
const int lx = mask - PF_L0;
ref[lx] = rpl[lx].ref[mv->ref_idx[lx]];
if (!ref[lx])
return AVERROR_INVALIDDATA;
}
}
return 0;
}
#define POS(c_idx, x, y) \
&fc->frame->data[c_idx][((y) >> fc->ps.sps->vshift[c_idx]) * fc->frame->linesize[c_idx] + \
(((x) >> fc->ps.sps->hshift[c_idx]) << fc->ps.sps->pixel_shift)]
static void pred_gpm_blk(VVCLocalContext *lc)
{
const VVCFrameContext *fc = lc->fc;
const CodingUnit *cu = lc->cu;
const PredictionUnit *pu = &cu->pu;
const uint8_t angle_idx = ff_vvc_gpm_angle_idx[pu->gpm_partition_idx];
const uint8_t weights_idx = ff_vvc_gpm_angle_to_weights_idx[angle_idx];
const int w = av_log2(cu->cb_width) - 3;
const int h = av_log2(cu->cb_height) - 3;
const uint8_t off_x = ff_vvc_gpm_weights_offset_x[pu->gpm_partition_idx][h][w];
const uint8_t off_y = ff_vvc_gpm_weights_offset_y[pu->gpm_partition_idx][h][w];
const uint8_t mirror_type = ff_vvc_gpm_angle_to_mirror[angle_idx];
const uint8_t *weights;
const int c_end = fc->ps.sps->r->sps_chroma_format_idc ? 3 : 1;
int16_t *tmp[2] = {lc->tmp, lc->tmp1};
for (int c_idx = 0; c_idx < c_end; c_idx++) {
const int hs = fc->ps.sps->hshift[c_idx];
const int vs = fc->ps.sps->vshift[c_idx];
const int x = lc->cu->x0 >> hs;
const int y = lc->cu->y0 >> vs;
const int width = cu->cb_width >> hs;
const int height = cu->cb_height >> vs;
uint8_t *dst = POS(c_idx, lc->cu->x0, lc->cu->y0);
ptrdiff_t dst_stride = fc->frame->linesize[c_idx];
int step_x = 1 << hs;
int step_y = VVC_GPM_WEIGHT_SIZE << vs;
if (!mirror_type) {
weights = &ff_vvc_gpm_weights[weights_idx][off_y * VVC_GPM_WEIGHT_SIZE + off_x];
} else if (mirror_type == 1) {
step_x = -step_x;
weights = &ff_vvc_gpm_weights[weights_idx][off_y * VVC_GPM_WEIGHT_SIZE + VVC_GPM_WEIGHT_SIZE - 1- off_x];
} else {
step_y = -step_y;
weights = &ff_vvc_gpm_weights[weights_idx][(VVC_GPM_WEIGHT_SIZE - 1 - off_y) * VVC_GPM_WEIGHT_SIZE + off_x];
}
for (int i = 0; i < 2; i++) {
const MvField *mv = pu->gpm_mv + i;
const int lx = mv->pred_flag - PF_L0;
VVCFrame *ref = lc->sc->rpl[lx].ref[mv->ref_idx[lx]];
if (!ref)
return;
if (c_idx)
chroma_mc(lc, tmp[i], ref->frame, mv->mv + lx, x, y, width, height, c_idx);
else
luma_mc(lc, tmp[i], ref->frame, mv->mv + lx, x, y, width, height);
}
fc->vvcdsp.inter.put_gpm(dst, dst_stride, width, height, tmp[0], tmp[1], weights, step_x, step_y);
}
return;
}
static int ciip_derive_intra_weight(const VVCLocalContext *lc, const int x0, const int y0,
const int width, const int height)
{
const VVCFrameContext *fc = lc->fc;
const VVCSPS *sps = fc->ps.sps;
const int x0b = av_mod_uintp2(x0, sps->ctb_log2_size_y);
const int y0b = av_mod_uintp2(y0, sps->ctb_log2_size_y);
const int available_l = lc->ctb_left_flag || x0b;
const int available_u = lc->ctb_up_flag || y0b;
const int min_pu_width = fc->ps.pps->min_pu_width;
int w = 1;
if (available_u &&fc->tab.mvf[((y0 - 1) >> MIN_PU_LOG2) * min_pu_width + ((x0 - 1 + width)>> MIN_PU_LOG2)].pred_flag == PF_INTRA)
w++;
if (available_l && fc->tab.mvf[((y0 - 1 + height)>> MIN_PU_LOG2) * min_pu_width + ((x0 - 1) >> MIN_PU_LOG2)].pred_flag == PF_INTRA)
w++;
return w;
}
static void pred_regular_luma(VVCLocalContext *lc, const int hf_idx, const int vf_idx, const MvField *mv,
const int x0, const int y0, const int sbw, const int sbh, const MvField *orig_mv, const int sb_bdof_flag)
{
const SliceContext *sc = lc->sc;
const VVCFrameContext *fc = lc->fc;
const int ciip_flag = lc->cu->ciip_flag;
uint8_t *dst = POS(0, x0, y0);
const ptrdiff_t dst_stride = fc->frame->linesize[0];
uint8_t *inter = ciip_flag ? (uint8_t *)lc->ciip_tmp1 : dst;
const ptrdiff_t inter_stride = ciip_flag ? (MAX_PB_SIZE * sizeof(uint16_t)) : dst_stride;
VVCFrame *ref[2];
if (pred_get_refs(lc, ref, mv) < 0)
return;
if (mv->pred_flag != PF_BI) {
const int lx = mv->pred_flag - PF_L0;
luma_mc_uni(lc, inter, inter_stride, ref[lx]->frame,
mv, x0, y0, sbw, sbh, hf_idx, vf_idx);
} else {
luma_mc_bi(lc, inter, inter_stride, ref[0]->frame,
&mv->mv[0], x0, y0, sbw, sbh, ref[1]->frame, &mv->mv[1], mv,
hf_idx, vf_idx, orig_mv, sb_bdof_flag);
}
if (ciip_flag) {
const int intra_weight = ciip_derive_intra_weight(lc, x0, y0, sbw, sbh);
fc->vvcdsp.intra.intra_pred(lc, x0, y0, sbw, sbh, 0);
if (sc->sh.r->sh_lmcs_used_flag)
fc->vvcdsp.lmcs.filter(inter, inter_stride, sbw, sbh, fc->ps.lmcs.fwd_lut);
fc->vvcdsp.inter.put_ciip(dst, dst_stride, sbw, sbh, inter, inter_stride, intra_weight);
}
}
static void pred_regular_chroma(VVCLocalContext *lc, const MvField *mv,
const int x0, const int y0, const int sbw, const int sbh, const MvField *orig_mv, const int dmvr_flag)
{
const VVCFrameContext *fc = lc->fc;
const int hs = fc->ps.sps->hshift[1];
const int vs = fc->ps.sps->vshift[1];
const int x0_c = x0 >> hs;
const int y0_c = y0 >> vs;
const int w_c = sbw >> hs;
const int h_c = sbh >> vs;
const int do_ciip = lc->cu->ciip_flag && (w_c > 2);
uint8_t* dst1 = POS(1, x0, y0);
uint8_t* dst2 = POS(2, x0, y0);
const ptrdiff_t dst1_stride = fc->frame->linesize[1];
const ptrdiff_t dst2_stride = fc->frame->linesize[2];
uint8_t *inter1 = do_ciip ? (uint8_t *)lc->ciip_tmp1 : dst1;
const ptrdiff_t inter1_stride = do_ciip ? (MAX_PB_SIZE * sizeof(uint16_t)) : dst1_stride;
uint8_t *inter2 = do_ciip ? (uint8_t *)lc->ciip_tmp2 : dst2;
const ptrdiff_t inter2_stride = do_ciip ? (MAX_PB_SIZE * sizeof(uint16_t)) : dst2_stride;
//fix me
const int hf_idx = 0;
const int vf_idx = 0;
VVCFrame *ref[2];
if (pred_get_refs(lc, ref, mv) < 0)
return;
if (mv->pred_flag != PF_BI) {
const int lx = mv->pred_flag - PF_L0;
if (!ref[lx])
return;
chroma_mc_uni(lc, inter1, inter1_stride, ref[lx]->frame->data[1], ref[lx]->frame->linesize[1],
x0_c, y0_c, w_c, h_c, mv, CB, hf_idx, vf_idx);
chroma_mc_uni(lc, inter2, inter2_stride, ref[lx]->frame->data[2], ref[lx]->frame->linesize[2],
x0_c, y0_c, w_c, h_c, mv, CR, hf_idx, vf_idx);
} else {
if (!ref[0] || !ref[1])
return;
chroma_mc_bi(lc, inter1, inter1_stride, ref[0]->frame, ref[1]->frame,
x0_c, y0_c, w_c, h_c, mv, CB, hf_idx, vf_idx, orig_mv, dmvr_flag, lc->cu->ciip_flag);
chroma_mc_bi(lc, inter2, inter2_stride, ref[0]->frame, ref[1]->frame,
x0_c, y0_c, w_c, h_c, mv, CR, hf_idx, vf_idx, orig_mv, dmvr_flag, lc->cu->ciip_flag);
}
if (do_ciip) {
const int intra_weight = ciip_derive_intra_weight(lc, x0, y0, sbw, sbh);
fc->vvcdsp.intra.intra_pred(lc, x0, y0, sbw, sbh, 1);
fc->vvcdsp.intra.intra_pred(lc, x0, y0, sbw, sbh, 2);
fc->vvcdsp.inter.put_ciip(dst1, dst1_stride, w_c, h_c, inter1, inter1_stride, intra_weight);
fc->vvcdsp.inter.put_ciip(dst2, dst2_stride, w_c, h_c, inter2, inter2_stride, intra_weight);
}
}
// 8.5.3.5 Parametric motion vector refinement process
static int parametric_mv_refine(const int *sad, const int stride)
{
const int sad_minus = sad[-stride];
const int sad_center = sad[0];
const int sad_plus = sad[stride];
int dmvc;
int denom = (( sad_minus + sad_plus) - (sad_center << 1 ) ) << 3;
if (!denom)
dmvc = 0;
else {
if (sad_minus == sad_center)
dmvc = -8;
else if (sad_plus == sad_center)
dmvc = 8;
else {
int num = ( sad_minus - sad_plus ) * (1 << 4);
int sign_num = 0;
int quotient = 0;
int counter = 3;
if (num < 0 ) {
num = - num;
sign_num = 1;
}
while (counter > 0) {
counter = counter - 1;
quotient = quotient << 1;
if ( num >= denom ) {
num = num - denom;
quotient = quotient + 1;
}
denom = (denom >> 1);
}
if (sign_num == 1 )
dmvc = -quotient;
else
dmvc = quotient;
}
}
return dmvc;
}
#define SAD_ARRAY_SIZE 5
//8.5.3 Decoder-side motion vector refinement process
static void dmvr_mv_refine(VVCLocalContext *lc, MvField *mvf, MvField *orig_mv, int *sb_bdof_flag,
const AVFrame *ref0, const AVFrame *ref1, const int x_off, const int y_off, const int block_w, const int block_h)
{
const VVCFrameContext *fc = lc->fc;
const int sr_range = 2;
const AVFrame *ref[] = { ref0, ref1 };
int16_t *tmp[] = { lc->tmp, lc->tmp1 };
int sad[SAD_ARRAY_SIZE][SAD_ARRAY_SIZE];
int min_dx, min_dy, min_sad, dx, dy;
*orig_mv = *mvf;
min_dx = min_dy = dx = dy = 2;
for (int i = L0; i <= L1; i++) {
const int pred_w = block_w + 2 * sr_range;
const int pred_h = block_h + 2 * sr_range;
const Mv *mv = mvf->mv + i;
const int mx = mv->x & 0xf;
const int my = mv->y & 0xf;
const int ox = x_off + (mv->x >> 4) - sr_range;
const int oy = y_off + (mv->y >> 4) - sr_range;
ptrdiff_t src_stride = ref[i]->linesize[LUMA];
const uint8_t *src = ref[i]->data[LUMA] + oy * src_stride + (ox * (1 << fc->ps.sps->pixel_shift));
EMULATED_EDGE_BILINEAR(lc->edge_emu_buffer, &src, &src_stride, ox, oy);
fc->vvcdsp.inter.dmvr[!!my][!!mx](tmp[i], src, src_stride, pred_h, mx, my, pred_w);
}
min_sad = fc->vvcdsp.inter.sad(tmp[L0], tmp[L1], dx, dy, block_w, block_h);
min_sad -= min_sad >> 2;
sad[dy][dx] = min_sad;
if (min_sad >= block_w * block_h) {
int dmv[2];
// 8.5.3.4 Array entry selection process
for (dy = 0; dy < SAD_ARRAY_SIZE; dy++) {
for (dx = 0; dx < SAD_ARRAY_SIZE; dx++) {
if (dx != sr_range || dy != sr_range) {
sad[dy][dx] = fc->vvcdsp.inter.sad(lc->tmp, lc->tmp1, dx, dy, block_w, block_h);
if (sad[dy][dx] < min_sad) {
min_sad = sad[dy][dx];
min_dx = dx;
min_dy = dy;
}
}
}
}
dmv[0] = (min_dx - sr_range) * (1 << 4);
dmv[1] = (min_dy - sr_range) * (1 << 4);
if (min_dx != 0 && min_dx != 4 && min_dy != 0 && min_dy != 4) {
dmv[0] += parametric_mv_refine(&sad[min_dy][min_dx], 1);
dmv[1] += parametric_mv_refine(&sad[min_dy][min_dx], SAD_ARRAY_SIZE);
}
for (int i = L0; i <= L1; i++) {
Mv *mv = mvf->mv + i;
mv->x += (1 - 2 * i) * dmv[0];
mv->y += (1 - 2 * i) * dmv[1];
ff_vvc_clip_mv(mv);
}
}
if (min_sad < 2 * block_w * block_h) {
*sb_bdof_flag = 0;
}
}
static void set_dmvr_info(VVCFrameContext *fc, const int x0, const int y0,
const int width, const int height, const MvField *mvf)
{
const VVCPPS *pps = fc->ps.pps;
for (int y = y0; y < y0 + height; y += MIN_PU_SIZE) {
for (int x = x0; x < x0 + width; x += MIN_PU_SIZE) {
const int idx = pps->min_pu_width * (y >> MIN_PU_LOG2) + (x >> MIN_PU_LOG2);
fc->ref->tab_dmvr_mvf[idx] = *mvf;
}
}
}
static void derive_sb_mv(VVCLocalContext *lc, MvField *mv, MvField *orig_mv, int *sb_bdof_flag,
const int x0, const int y0, const int sbw, const int sbh)
{
VVCFrameContext *fc = lc->fc;
const PredictionUnit *pu = &lc->cu->pu;
*orig_mv = *mv = *ff_vvc_get_mvf(fc, x0, y0);
if (pu->bdof_flag)
*sb_bdof_flag = 1;
if (pu->dmvr_flag) {
VVCFrame* ref[2];
if (pred_get_refs(lc, ref, mv) < 0)
return;
dmvr_mv_refine(lc, mv, orig_mv, sb_bdof_flag, ref[0]->frame, ref[1]->frame, x0, y0, sbw, sbh);
set_dmvr_info(fc, x0, y0, sbw, sbh, mv);
}
}
static void pred_regular_blk(VVCLocalContext *lc, const int skip_ciip)
{
const VVCFrameContext *fc = lc->fc;
const CodingUnit *cu = lc->cu;
PredictionUnit *pu = &lc->cu->pu;
const MotionInfo *mi = &pu->mi;
MvField mv, orig_mv;
int sbw, sbh, sb_bdof_flag = 0;
if (cu->ciip_flag && skip_ciip)
return;
sbw = cu->cb_width / mi->num_sb_x;
sbh = cu->cb_height / mi->num_sb_y;
for (int sby = 0; sby < mi->num_sb_y; sby++) {
for (int sbx = 0; sbx < mi->num_sb_x; sbx++) {
const int x0 = cu->x0 + sbx * sbw;
const int y0 = cu->y0 + sby * sbh;
if (cu->ciip_flag)
ff_vvc_set_neighbour_available(lc, x0, y0, sbw, sbh);
derive_sb_mv(lc, &mv, &orig_mv, &sb_bdof_flag, x0, y0, sbw, sbh);
pred_regular_luma(lc, mi->hpel_if_idx, mi->hpel_if_idx, &mv, x0, y0, sbw, sbh, &orig_mv, sb_bdof_flag);
if (fc->ps.sps->r->sps_chroma_format_idc)
pred_regular_chroma(lc, &mv, x0, y0, sbw, sbh, &orig_mv, pu->dmvr_flag);
}
}
}
static void derive_affine_mvc(MvField *mvc, const VVCFrameContext *fc, const MvField *mv,
const int x0, const int y0, const int sbw, const int sbh)
{
const int hs = fc->ps.sps->hshift[1];
const int vs = fc->ps.sps->vshift[1];
const MvField* mv2 = ff_vvc_get_mvf(fc, x0 + hs * sbw, y0 + vs * sbh);
*mvc = *mv;
mvc->mv[0].x += mv2->mv[0].x;
mvc->mv[0].y += mv2->mv[0].y;
mvc->mv[1].x += mv2->mv[1].x;
mvc->mv[1].y += mv2->mv[1].y;
ff_vvc_round_mv(mvc->mv + 0, 0, 1);
ff_vvc_round_mv(mvc->mv + 1, 0, 1);
}
static void pred_affine_blk(VVCLocalContext *lc)
{
const VVCFrameContext *fc = lc->fc;
const CodingUnit *cu = lc->cu;
const PredictionUnit *pu = &cu->pu;
const MotionInfo *mi = &pu->mi;
const int x0 = cu->x0;
const int y0 = cu->y0;
const int sbw = cu->cb_width / mi->num_sb_x;
const int sbh = cu->cb_height / mi->num_sb_y;
const int hs = fc->ps.sps->hshift[1];
const int vs = fc->ps.sps->vshift[1];
for (int sby = 0; sby < mi->num_sb_y; sby++) {
for (int sbx = 0; sbx < mi->num_sb_x; sbx++) {
const int x = x0 + sbx * sbw;
const int y = y0 + sby * sbh;
uint8_t *dst0 = POS(0, x, y);
const MvField *mv = ff_vvc_get_mvf(fc, x, y);
VVCFrame *ref[2];
if (pred_get_refs(lc, ref, mv) < 0)
return;
if (mi->pred_flag != PF_BI) {
const int lx = mi->pred_flag - PF_L0;
luma_prof_uni(lc, dst0, fc->frame->linesize[0], ref[lx]->frame,
mv, x, y, sbw, sbh, pu->cb_prof_flag[lx],
pu->diff_mv_x[lx], pu->diff_mv_y[lx]);
} else {
luma_prof_bi(lc, dst0, fc->frame->linesize[0], ref[0]->frame, ref[1]->frame,
mv, x, y, sbw, sbh);
}
if (fc->ps.sps->r->sps_chroma_format_idc) {
if (!av_mod_uintp2(sby, vs) && !av_mod_uintp2(sbx, hs)) {
MvField mvc;
derive_affine_mvc(&mvc, fc, mv, x, y, sbw, sbh);
pred_regular_chroma(lc, &mvc, x, y, sbw<<hs, sbh<<vs, NULL, 0);
}
}
}
}
}
static void predict_inter(VVCLocalContext *lc)
{
const VVCFrameContext *fc = lc->fc;
const CodingUnit *cu = lc->cu;
const PredictionUnit *pu = &cu->pu;
if (pu->merge_gpm_flag)
pred_gpm_blk(lc);
else if (pu->inter_affine_flag)
pred_affine_blk(lc);
else
pred_regular_blk(lc, 1); //intra block is not ready yet, skip ciip
if (lc->sc->sh.r->sh_lmcs_used_flag && !cu->ciip_flag) {
uint8_t* dst0 = POS(0, cu->x0, cu->y0);
fc->vvcdsp.lmcs.filter(dst0, fc->frame->linesize[LUMA], cu->cb_width, cu->cb_height, fc->ps.lmcs.fwd_lut);
}
}
static int has_inter_luma(const CodingUnit *cu)
{
return cu->pred_mode != MODE_INTRA && cu->pred_mode != MODE_PLT && cu->tree_type != DUAL_TREE_CHROMA;
}
int ff_vvc_predict_inter(VVCLocalContext *lc, const int rs)
{
const VVCFrameContext *fc = lc->fc;
const CTU *ctu = fc->tab.ctus + rs;
CodingUnit *cu = ctu->cus;
while (cu) {
lc->cu = cu;
if (has_inter_luma(cu))
predict_inter(lc);
cu = cu->next;
}
return 0;
}
void ff_vvc_predict_ciip(VVCLocalContext *lc)
{
av_assert0(lc->cu->ciip_flag);
//todo: refact out ciip from pred_regular_blk
pred_regular_blk(lc, 0);
}
#undef POS
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