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ffmpeg/libavcodec/vp9block.c
Andreas Rheinhardt 7bd3b73716 avcodec/vp9: Switch to ProgressFrames 
This already fixes a race in the vp9-encparams test. In this test,
side data is added to the current frame after having been decoded
(and therefore after ff_thread_finish_setup() has been called).
Yet the update_thread_context callback called ff_thread_ref_frame()
and therefore av_frame_ref() with this frame as source frame and
the ensuing read was unsynchronised with adding the side data,
i.e. there was a data race.

By switching to the ProgressFrame API the implicit av_frame_ref()
is removed and the race fixed except if this frame is later reused by
a show-existing-frame which uses an explicit av_frame_ref().
The vp9-encparams test does not cover this, so this commit
already fixes all the races in this test.

This decoder kept multiple references to the same ThreadFrames
in the same context and therefore had lots of implicit av_frame_ref()
even when decoding single-threaded. This incurred lots of small
allocations: When decoding an ordinary 10s video in single-threaded
mode the number of allocations reported by Valgrind went down
from 57,814 to 20,908; for 10 threads it went down from 84,223 to
21,901.

Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-04-19 13:18:04 +02:00

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/*
* VP9 compatible video decoder
*
* Copyright (C) 2013 Ronald S. Bultje <rsbultje gmail com>
* Copyright (C) 2013 Clément Bœsch <u pkh me>
*
* 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/avassert.h"
#include "libavutil/frame.h"
#include "progressframe.h"
#include "vp89_rac.h"
#include "vp9.h"
#include "vp9data.h"
#include "vp9dec.h"
#include "vpx_rac.h"
static av_always_inline void setctx_2d(uint8_t *ptr, int w, int h,
ptrdiff_t stride, int v)
{
switch (w) {
case 1:
do {
*ptr = v;
ptr += stride;
} while (--h);
break;
case 2: {
int v16 = v * 0x0101;
do {
AV_WN16A(ptr, v16);
ptr += stride;
} while (--h);
break;
}
case 4: {
uint32_t v32 = v * 0x01010101;
do {
AV_WN32A(ptr, v32);
ptr += stride;
} while (--h);
break;
}
case 8: {
#if HAVE_FAST_64BIT
uint64_t v64 = v * 0x0101010101010101ULL;
do {
AV_WN64A(ptr, v64);
ptr += stride;
} while (--h);
#else
uint32_t v32 = v * 0x01010101;
do {
AV_WN32A(ptr, v32);
AV_WN32A(ptr + 4, v32);
ptr += stride;
} while (--h);
#endif
break;
}
}
}
static void decode_mode(VP9TileData *td)
{
static const uint8_t left_ctx[N_BS_SIZES] = {
0x0, 0x8, 0x0, 0x8, 0xc, 0x8, 0xc, 0xe, 0xc, 0xe, 0xf, 0xe, 0xf
};
static const uint8_t above_ctx[N_BS_SIZES] = {
0x0, 0x0, 0x8, 0x8, 0x8, 0xc, 0xc, 0xc, 0xe, 0xe, 0xe, 0xf, 0xf
};
static const uint8_t max_tx_for_bl_bp[N_BS_SIZES] = {
TX_32X32, TX_32X32, TX_32X32, TX_32X32, TX_16X16, TX_16X16,
TX_16X16, TX_8X8, TX_8X8, TX_8X8, TX_4X4, TX_4X4, TX_4X4
};
const VP9Context *s = td->s;
VP9Block *b = td->b;
int row = td->row, col = td->col, row7 = td->row7;
enum TxfmMode max_tx = max_tx_for_bl_bp[b->bs];
int bw4 = ff_vp9_bwh_tab[1][b->bs][0], w4 = FFMIN(s->cols - col, bw4);
int bh4 = ff_vp9_bwh_tab[1][b->bs][1], h4 = FFMIN(s->rows - row, bh4), y;
int have_a = row > 0, have_l = col > td->tile_col_start;
int vref, filter_id;
if (!s->s.h.segmentation.enabled) {
b->seg_id = 0;
} else if (s->s.h.keyframe || s->s.h.intraonly) {
b->seg_id = !s->s.h.segmentation.update_map ? 0 :
vp89_rac_get_tree(td->c, ff_vp9_segmentation_tree,
s->s.h.segmentation.prob);
} else if (!s->s.h.segmentation.update_map ||
(s->s.h.segmentation.temporal &&
vpx_rac_get_prob_branchy(td->c,
s->s.h.segmentation.pred_prob[s->above_segpred_ctx[col] +
td->left_segpred_ctx[row7]]))) {
if (!s->s.h.errorres && s->s.frames[REF_FRAME_SEGMAP].segmentation_map) {
int pred = 8, x;
uint8_t *refsegmap = s->s.frames[REF_FRAME_SEGMAP].segmentation_map;
if (!s->s.frames[REF_FRAME_SEGMAP].uses_2pass)
ff_progress_frame_await(&s->s.frames[REF_FRAME_SEGMAP].tf, row >> 3);
for (y = 0; y < h4; y++) {
int idx_base = (y + row) * 8 * s->sb_cols + col;
for (x = 0; x < w4; x++)
pred = FFMIN(pred, refsegmap[idx_base + x]);
}
av_assert1(pred < 8);
b->seg_id = pred;
} else {
b->seg_id = 0;
}
memset(&s->above_segpred_ctx[col], 1, w4);
memset(&td->left_segpred_ctx[row7], 1, h4);
} else {
b->seg_id = vp89_rac_get_tree(td->c, ff_vp9_segmentation_tree,
s->s.h.segmentation.prob);
memset(&s->above_segpred_ctx[col], 0, w4);
memset(&td->left_segpred_ctx[row7], 0, h4);
}
if (s->s.h.segmentation.enabled &&
(s->s.h.segmentation.update_map || s->s.h.keyframe || s->s.h.intraonly)) {
setctx_2d(&s->s.frames[CUR_FRAME].segmentation_map[row * 8 * s->sb_cols + col],
bw4, bh4, 8 * s->sb_cols, b->seg_id);
}
b->skip = s->s.h.segmentation.enabled &&
s->s.h.segmentation.feat[b->seg_id].skip_enabled;
if (!b->skip) {
int c = td->left_skip_ctx[row7] + s->above_skip_ctx[col];
b->skip = vpx_rac_get_prob(td->c, s->prob.p.skip[c]);
td->counts.skip[c][b->skip]++;
}
if (s->s.h.keyframe || s->s.h.intraonly) {
b->intra = 1;
} else if (s->s.h.segmentation.enabled && s->s.h.segmentation.feat[b->seg_id].ref_enabled) {
b->intra = !s->s.h.segmentation.feat[b->seg_id].ref_val;
} else {
int c, bit;
if (have_a && have_l) {
c = s->above_intra_ctx[col] + td->left_intra_ctx[row7];
c += (c == 2);
} else {
c = have_a ? 2 * s->above_intra_ctx[col] :
have_l ? 2 * td->left_intra_ctx[row7] : 0;
}
bit = vpx_rac_get_prob(td->c, s->prob.p.intra[c]);
td->counts.intra[c][bit]++;
b->intra = !bit;
}
if ((b->intra || !b->skip) && s->s.h.txfmmode == TX_SWITCHABLE) {
int c;
if (have_a) {
if (have_l) {
c = (s->above_skip_ctx[col] ? max_tx :
s->above_txfm_ctx[col]) +
(td->left_skip_ctx[row7] ? max_tx :
td->left_txfm_ctx[row7]) > max_tx;
} else {
c = s->above_skip_ctx[col] ? 1 :
(s->above_txfm_ctx[col] * 2 > max_tx);
}
} else if (have_l) {
c = td->left_skip_ctx[row7] ? 1 :
(td->left_txfm_ctx[row7] * 2 > max_tx);
} else {
c = 1;
}
switch (max_tx) {
case TX_32X32:
b->tx = vpx_rac_get_prob(td->c, s->prob.p.tx32p[c][0]);
if (b->tx) {
b->tx += vpx_rac_get_prob(td->c, s->prob.p.tx32p[c][1]);
if (b->tx == 2)
b->tx += vpx_rac_get_prob(td->c, s->prob.p.tx32p[c][2]);
}
td->counts.tx32p[c][b->tx]++;
break;
case TX_16X16:
b->tx = vpx_rac_get_prob(td->c, s->prob.p.tx16p[c][0]);
if (b->tx)
b->tx += vpx_rac_get_prob(td->c, s->prob.p.tx16p[c][1]);
td->counts.tx16p[c][b->tx]++;
break;
case TX_8X8:
b->tx = vpx_rac_get_prob(td->c, s->prob.p.tx8p[c]);
td->counts.tx8p[c][b->tx]++;
break;
case TX_4X4:
b->tx = TX_4X4;
break;
}
} else {
b->tx = FFMIN(max_tx, s->s.h.txfmmode);
}
if (s->s.h.keyframe || s->s.h.intraonly) {
uint8_t *a = &s->above_mode_ctx[col * 2];
uint8_t *l = &td->left_mode_ctx[(row7) << 1];
b->comp = 0;
if (b->bs > BS_8x8) {
// FIXME the memory storage intermediates here aren't really
// necessary, they're just there to make the code slightly
// simpler for now
b->mode[0] =
a[0] = vp89_rac_get_tree(td->c, ff_vp9_intramode_tree,
ff_vp9_default_kf_ymode_probs[a[0]][l[0]]);
if (b->bs != BS_8x4) {
b->mode[1] = vp89_rac_get_tree(td->c, ff_vp9_intramode_tree,
ff_vp9_default_kf_ymode_probs[a[1]][b->mode[0]]);
l[0] =
a[1] = b->mode[1];
} else {
l[0] =
a[1] =
b->mode[1] = b->mode[0];
}
if (b->bs != BS_4x8) {
b->mode[2] =
a[0] = vp89_rac_get_tree(td->c, ff_vp9_intramode_tree,
ff_vp9_default_kf_ymode_probs[a[0]][l[1]]);
if (b->bs != BS_8x4) {
b->mode[3] = vp89_rac_get_tree(td->c, ff_vp9_intramode_tree,
ff_vp9_default_kf_ymode_probs[a[1]][b->mode[2]]);
l[1] =
a[1] = b->mode[3];
} else {
l[1] =
a[1] =
b->mode[3] = b->mode[2];
}
} else {
b->mode[2] = b->mode[0];
l[1] =
a[1] =
b->mode[3] = b->mode[1];
}
} else {
b->mode[0] = vp89_rac_get_tree(td->c, ff_vp9_intramode_tree,
ff_vp9_default_kf_ymode_probs[*a][*l]);
b->mode[3] =
b->mode[2] =
b->mode[1] = b->mode[0];
// FIXME this can probably be optimized
memset(a, b->mode[0], ff_vp9_bwh_tab[0][b->bs][0]);
memset(l, b->mode[0], ff_vp9_bwh_tab[0][b->bs][1]);
}
b->uvmode = vp89_rac_get_tree(td->c, ff_vp9_intramode_tree,
ff_vp9_default_kf_uvmode_probs[b->mode[3]]);
} else if (b->intra) {
b->comp = 0;
if (b->bs > BS_8x8) {
b->mode[0] = vp89_rac_get_tree(td->c, ff_vp9_intramode_tree,
s->prob.p.y_mode[0]);
td->counts.y_mode[0][b->mode[0]]++;
if (b->bs != BS_8x4) {
b->mode[1] = vp89_rac_get_tree(td->c, ff_vp9_intramode_tree,
s->prob.p.y_mode[0]);
td->counts.y_mode[0][b->mode[1]]++;
} else {
b->mode[1] = b->mode[0];
}
if (b->bs != BS_4x8) {
b->mode[2] = vp89_rac_get_tree(td->c, ff_vp9_intramode_tree,
s->prob.p.y_mode[0]);
td->counts.y_mode[0][b->mode[2]]++;
if (b->bs != BS_8x4) {
b->mode[3] = vp89_rac_get_tree(td->c, ff_vp9_intramode_tree,
s->prob.p.y_mode[0]);
td->counts.y_mode[0][b->mode[3]]++;
} else {
b->mode[3] = b->mode[2];
}
} else {
b->mode[2] = b->mode[0];
b->mode[3] = b->mode[1];
}
} else {
static const uint8_t size_group[10] = {
3, 3, 3, 3, 2, 2, 2, 1, 1, 1
};
int sz = size_group[b->bs];
b->mode[0] = vp89_rac_get_tree(td->c, ff_vp9_intramode_tree,
s->prob.p.y_mode[sz]);
b->mode[1] =
b->mode[2] =
b->mode[3] = b->mode[0];
td->counts.y_mode[sz][b->mode[3]]++;
}
b->uvmode = vp89_rac_get_tree(td->c, ff_vp9_intramode_tree,
s->prob.p.uv_mode[b->mode[3]]);
td->counts.uv_mode[b->mode[3]][b->uvmode]++;
} else {
static const uint8_t inter_mode_ctx_lut[14][14] = {
{ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5 },
{ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5 },
{ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5 },
{ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5 },
{ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5 },
{ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5 },
{ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5 },
{ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5 },
{ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5 },
{ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5 },
{ 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 3 },
{ 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 3 },
{ 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 0, 3 },
{ 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 4 },
};
if (s->s.h.segmentation.enabled && s->s.h.segmentation.feat[b->seg_id].ref_enabled) {
av_assert2(s->s.h.segmentation.feat[b->seg_id].ref_val != 0);
b->comp = 0;
b->ref[0] = s->s.h.segmentation.feat[b->seg_id].ref_val - 1;
} else {
// read comp_pred flag
if (s->s.h.comppredmode != PRED_SWITCHABLE) {
b->comp = s->s.h.comppredmode == PRED_COMPREF;
} else {
int c;
// FIXME add intra as ref=0xff (or -1) to make these easier?
if (have_a) {
if (have_l) {
if (s->above_comp_ctx[col] && td->left_comp_ctx[row7]) {
c = 4;
} else if (s->above_comp_ctx[col]) {
c = 2 + (td->left_intra_ctx[row7] ||
td->left_ref_ctx[row7] == s->s.h.fixcompref);
} else if (td->left_comp_ctx[row7]) {
c = 2 + (s->above_intra_ctx[col] ||
s->above_ref_ctx[col] == s->s.h.fixcompref);
} else {
c = (!s->above_intra_ctx[col] &&
s->above_ref_ctx[col] == s->s.h.fixcompref) ^
(!td->left_intra_ctx[row7] &&
td->left_ref_ctx[row & 7] == s->s.h.fixcompref);
}
} else {
c = s->above_comp_ctx[col] ? 3 :
(!s->above_intra_ctx[col] && s->above_ref_ctx[col] == s->s.h.fixcompref);
}
} else if (have_l) {
c = td->left_comp_ctx[row7] ? 3 :
(!td->left_intra_ctx[row7] && td->left_ref_ctx[row7] == s->s.h.fixcompref);
} else {
c = 1;
}
b->comp = vpx_rac_get_prob(td->c, s->prob.p.comp[c]);
td->counts.comp[c][b->comp]++;
}
// read actual references
// FIXME probably cache a few variables here to prevent repetitive
// memory accesses below
if (b->comp) { /* two references */
int fix_idx = s->s.h.signbias[s->s.h.fixcompref], var_idx = !fix_idx, c, bit;
b->ref[fix_idx] = s->s.h.fixcompref;
// FIXME can this codeblob be replaced by some sort of LUT?
if (have_a) {
if (have_l) {
if (s->above_intra_ctx[col]) {
if (td->left_intra_ctx[row7]) {
c = 2;
} else {
c = 1 + 2 * (td->left_ref_ctx[row7] != s->s.h.varcompref[1]);
}
} else if (td->left_intra_ctx[row7]) {
c = 1 + 2 * (s->above_ref_ctx[col] != s->s.h.varcompref[1]);
} else {
int refl = td->left_ref_ctx[row7], refa = s->above_ref_ctx[col];
if (refl == refa && refa == s->s.h.varcompref[1]) {
c = 0;
} else if (!td->left_comp_ctx[row7] && !s->above_comp_ctx[col]) {
if ((refa == s->s.h.fixcompref && refl == s->s.h.varcompref[0]) ||
(refl == s->s.h.fixcompref && refa == s->s.h.varcompref[0])) {
c = 4;
} else {
c = (refa == refl) ? 3 : 1;
}
} else if (!td->left_comp_ctx[row7]) {
if (refa == s->s.h.varcompref[1] && refl != s->s.h.varcompref[1]) {
c = 1;
} else {
c = (refl == s->s.h.varcompref[1] &&
refa != s->s.h.varcompref[1]) ? 2 : 4;
}
} else if (!s->above_comp_ctx[col]) {
if (refl == s->s.h.varcompref[1] && refa != s->s.h.varcompref[1]) {
c = 1;
} else {
c = (refa == s->s.h.varcompref[1] &&
refl != s->s.h.varcompref[1]) ? 2 : 4;
}
} else {
c = (refl == refa) ? 4 : 2;
}
}
} else {
if (s->above_intra_ctx[col]) {
c = 2;
} else if (s->above_comp_ctx[col]) {
c = 4 * (s->above_ref_ctx[col] != s->s.h.varcompref[1]);
} else {
c = 3 * (s->above_ref_ctx[col] != s->s.h.varcompref[1]);
}
}
} else if (have_l) {
if (td->left_intra_ctx[row7]) {
c = 2;
} else if (td->left_comp_ctx[row7]) {
c = 4 * (td->left_ref_ctx[row7] != s->s.h.varcompref[1]);
} else {
c = 3 * (td->left_ref_ctx[row7] != s->s.h.varcompref[1]);
}
} else {
c = 2;
}
bit = vpx_rac_get_prob(td->c, s->prob.p.comp_ref[c]);
b->ref[var_idx] = s->s.h.varcompref[bit];
td->counts.comp_ref[c][bit]++;
} else /* single reference */ {
int bit, c;
if (have_a && !s->above_intra_ctx[col]) {
if (have_l && !td->left_intra_ctx[row7]) {
if (td->left_comp_ctx[row7]) {
if (s->above_comp_ctx[col]) {
c = 1 + (!s->s.h.fixcompref || !td->left_ref_ctx[row7] ||
!s->above_ref_ctx[col]);
} else {
c = (3 * !s->above_ref_ctx[col]) +
(!s->s.h.fixcompref || !td->left_ref_ctx[row7]);
}
} else if (s->above_comp_ctx[col]) {
c = (3 * !td->left_ref_ctx[row7]) +
(!s->s.h.fixcompref || !s->above_ref_ctx[col]);
} else {
c = 2 * !td->left_ref_ctx[row7] + 2 * !s->above_ref_ctx[col];
}
} else if (s->above_intra_ctx[col]) {
c = 2;
} else if (s->above_comp_ctx[col]) {
c = 1 + (!s->s.h.fixcompref || !s->above_ref_ctx[col]);
} else {
c = 4 * (!s->above_ref_ctx[col]);
}
} else if (have_l && !td->left_intra_ctx[row7]) {
if (td->left_intra_ctx[row7]) {
c = 2;
} else if (td->left_comp_ctx[row7]) {
c = 1 + (!s->s.h.fixcompref || !td->left_ref_ctx[row7]);
} else {
c = 4 * (!td->left_ref_ctx[row7]);
}
} else {
c = 2;
}
bit = vpx_rac_get_prob(td->c, s->prob.p.single_ref[c][0]);
td->counts.single_ref[c][0][bit]++;
if (!bit) {
b->ref[0] = 0;
} else {
// FIXME can this codeblob be replaced by some sort of LUT?
if (have_a) {
if (have_l) {
if (td->left_intra_ctx[row7]) {
if (s->above_intra_ctx[col]) {
c = 2;
} else if (s->above_comp_ctx[col]) {
c = 1 + 2 * (s->s.h.fixcompref == 1 ||
s->above_ref_ctx[col] == 1);
} else if (!s->above_ref_ctx[col]) {
c = 3;
} else {
c = 4 * (s->above_ref_ctx[col] == 1);
}
} else if (s->above_intra_ctx[col]) {
if (td->left_intra_ctx[row7]) {
c = 2;
} else if (td->left_comp_ctx[row7]) {
c = 1 + 2 * (s->s.h.fixcompref == 1 ||
td->left_ref_ctx[row7] == 1);
} else if (!td->left_ref_ctx[row7]) {
c = 3;
} else {
c = 4 * (td->left_ref_ctx[row7] == 1);
}
} else if (s->above_comp_ctx[col]) {
if (td->left_comp_ctx[row7]) {
if (td->left_ref_ctx[row7] == s->above_ref_ctx[col]) {
c = 3 * (s->s.h.fixcompref == 1 ||
td->left_ref_ctx[row7] == 1);
} else {
c = 2;
}
} else if (!td->left_ref_ctx[row7]) {
c = 1 + 2 * (s->s.h.fixcompref == 1 ||
s->above_ref_ctx[col] == 1);
} else {
c = 3 * (td->left_ref_ctx[row7] == 1) +
(s->s.h.fixcompref == 1 || s->above_ref_ctx[col] == 1);
}
} else if (td->left_comp_ctx[row7]) {
if (!s->above_ref_ctx[col]) {
c = 1 + 2 * (s->s.h.fixcompref == 1 ||
td->left_ref_ctx[row7] == 1);
} else {
c = 3 * (s->above_ref_ctx[col] == 1) +
(s->s.h.fixcompref == 1 || td->left_ref_ctx[row7] == 1);
}
} else if (!s->above_ref_ctx[col]) {
if (!td->left_ref_ctx[row7]) {
c = 3;
} else {
c = 4 * (td->left_ref_ctx[row7] == 1);
}
} else if (!td->left_ref_ctx[row7]) {
c = 4 * (s->above_ref_ctx[col] == 1);
} else {
c = 2 * (td->left_ref_ctx[row7] == 1) +
2 * (s->above_ref_ctx[col] == 1);
}
} else {
if (s->above_intra_ctx[col] ||
(!s->above_comp_ctx[col] && !s->above_ref_ctx[col])) {
c = 2;
} else if (s->above_comp_ctx[col]) {
c = 3 * (s->s.h.fixcompref == 1 || s->above_ref_ctx[col] == 1);
} else {
c = 4 * (s->above_ref_ctx[col] == 1);
}
}
} else if (have_l) {
if (td->left_intra_ctx[row7] ||
(!td->left_comp_ctx[row7] && !td->left_ref_ctx[row7])) {
c = 2;
} else if (td->left_comp_ctx[row7]) {
c = 3 * (s->s.h.fixcompref == 1 || td->left_ref_ctx[row7] == 1);
} else {
c = 4 * (td->left_ref_ctx[row7] == 1);
}
} else {
c = 2;
}
bit = vpx_rac_get_prob(td->c, s->prob.p.single_ref[c][1]);
td->counts.single_ref[c][1][bit]++;
b->ref[0] = 1 + bit;
}
}
}
if (b->bs <= BS_8x8) {
if (s->s.h.segmentation.enabled && s->s.h.segmentation.feat[b->seg_id].skip_enabled) {
b->mode[0] =
b->mode[1] =
b->mode[2] =
b->mode[3] = ZEROMV;
} else {
static const uint8_t off[10] = {
3, 0, 0, 1, 0, 0, 0, 0, 0, 0
};
// FIXME this needs to use the LUT tables from find_ref_mvs
// because not all are -1,0/0,-1
int c = inter_mode_ctx_lut[s->above_mode_ctx[col + off[b->bs]]]
[td->left_mode_ctx[row7 + off[b->bs]]];
b->mode[0] = vp89_rac_get_tree(td->c, ff_vp9_inter_mode_tree,
s->prob.p.mv_mode[c]);
b->mode[1] =
b->mode[2] =
b->mode[3] = b->mode[0];
td->counts.mv_mode[c][b->mode[0] - 10]++;
}
}
if (s->s.h.filtermode == FILTER_SWITCHABLE) {
int c;
if (have_a && s->above_mode_ctx[col] >= NEARESTMV) {
if (have_l && td->left_mode_ctx[row7] >= NEARESTMV) {
c = s->above_filter_ctx[col] == td->left_filter_ctx[row7] ?
td->left_filter_ctx[row7] : 3;
} else {
c = s->above_filter_ctx[col];
}
} else if (have_l && td->left_mode_ctx[row7] >= NEARESTMV) {
c = td->left_filter_ctx[row7];
} else {
c = 3;
}
filter_id = vp89_rac_get_tree(td->c, ff_vp9_filter_tree,
s->prob.p.filter[c]);
td->counts.filter[c][filter_id]++;
b->filter = ff_vp9_filter_lut[filter_id];
} else {
b->filter = s->s.h.filtermode;
}
if (b->bs > BS_8x8) {
int c = inter_mode_ctx_lut[s->above_mode_ctx[col]][td->left_mode_ctx[row7]];
b->mode[0] = vp89_rac_get_tree(td->c, ff_vp9_inter_mode_tree,
s->prob.p.mv_mode[c]);
td->counts.mv_mode[c][b->mode[0] - 10]++;
ff_vp9_fill_mv(td, b->mv[0], b->mode[0], 0);
if (b->bs != BS_8x4) {
b->mode[1] = vp89_rac_get_tree(td->c, ff_vp9_inter_mode_tree,
s->prob.p.mv_mode[c]);
td->counts.mv_mode[c][b->mode[1] - 10]++;
ff_vp9_fill_mv(td, b->mv[1], b->mode[1], 1);
} else {
b->mode[1] = b->mode[0];
AV_COPY32(&b->mv[1][0], &b->mv[0][0]);
AV_COPY32(&b->mv[1][1], &b->mv[0][1]);
}
if (b->bs != BS_4x8) {
b->mode[2] = vp89_rac_get_tree(td->c, ff_vp9_inter_mode_tree,
s->prob.p.mv_mode[c]);
td->counts.mv_mode[c][b->mode[2] - 10]++;
ff_vp9_fill_mv(td, b->mv[2], b->mode[2], 2);
if (b->bs != BS_8x4) {
b->mode[3] = vp89_rac_get_tree(td->c, ff_vp9_inter_mode_tree,
s->prob.p.mv_mode[c]);
td->counts.mv_mode[c][b->mode[3] - 10]++;
ff_vp9_fill_mv(td, b->mv[3], b->mode[3], 3);
} else {
b->mode[3] = b->mode[2];
AV_COPY32(&b->mv[3][0], &b->mv[2][0]);
AV_COPY32(&b->mv[3][1], &b->mv[2][1]);
}
} else {
b->mode[2] = b->mode[0];
AV_COPY32(&b->mv[2][0], &b->mv[0][0]);
AV_COPY32(&b->mv[2][1], &b->mv[0][1]);
b->mode[3] = b->mode[1];
AV_COPY32(&b->mv[3][0], &b->mv[1][0]);
AV_COPY32(&b->mv[3][1], &b->mv[1][1]);
}
} else {
ff_vp9_fill_mv(td, b->mv[0], b->mode[0], -1);
AV_COPY32(&b->mv[1][0], &b->mv[0][0]);
AV_COPY32(&b->mv[2][0], &b->mv[0][0]);
AV_COPY32(&b->mv[3][0], &b->mv[0][0]);
AV_COPY32(&b->mv[1][1], &b->mv[0][1]);
AV_COPY32(&b->mv[2][1], &b->mv[0][1]);
AV_COPY32(&b->mv[3][1], &b->mv[0][1]);
}
vref = b->ref[b->comp ? s->s.h.signbias[s->s.h.varcompref[0]] : 0];
}
#if HAVE_FAST_64BIT
#define SPLAT_CTX(var, val, n) \
switch (n) { \
case 1: var = val; break; \
case 2: AV_WN16A(&var, val * 0x0101); break; \
case 4: AV_WN32A(&var, val * 0x01010101); break; \
case 8: AV_WN64A(&var, val * 0x0101010101010101ULL); break; \
case 16: { \
uint64_t v64 = val * 0x0101010101010101ULL; \
AV_WN64A( &var, v64); \
AV_WN64A(&((uint8_t *) &var)[8], v64); \
break; \
} \
}
#else
#define SPLAT_CTX(var, val, n) \
switch (n) { \
case 1: var = val; break; \
case 2: AV_WN16A(&var, val * 0x0101); break; \
case 4: AV_WN32A(&var, val * 0x01010101); break; \
case 8: { \
uint32_t v32 = val * 0x01010101; \
AV_WN32A( &var, v32); \
AV_WN32A(&((uint8_t *) &var)[4], v32); \
break; \
} \
case 16: { \
uint32_t v32 = val * 0x01010101; \
AV_WN32A( &var, v32); \
AV_WN32A(&((uint8_t *) &var)[4], v32); \
AV_WN32A(&((uint8_t *) &var)[8], v32); \
AV_WN32A(&((uint8_t *) &var)[12], v32); \
break; \
} \
}
#endif
switch (ff_vp9_bwh_tab[1][b->bs][0]) {
#define SET_CTXS(perf, dir, off, n) \
do { \
SPLAT_CTX(perf->dir##_skip_ctx[off], b->skip, n); \
SPLAT_CTX(perf->dir##_txfm_ctx[off], b->tx, n); \
SPLAT_CTX(perf->dir##_partition_ctx[off], dir##_ctx[b->bs], n); \
if (!s->s.h.keyframe && !s->s.h.intraonly) { \
SPLAT_CTX(perf->dir##_intra_ctx[off], b->intra, n); \
SPLAT_CTX(perf->dir##_comp_ctx[off], b->comp, n); \
SPLAT_CTX(perf->dir##_mode_ctx[off], b->mode[3], n); \
if (!b->intra) { \
SPLAT_CTX(perf->dir##_ref_ctx[off], vref, n); \
if (s->s.h.filtermode == FILTER_SWITCHABLE) { \
SPLAT_CTX(perf->dir##_filter_ctx[off], filter_id, n); \
} \
} \
} \
} while (0)
case 1: SET_CTXS(s, above, col, 1); break;
case 2: SET_CTXS(s, above, col, 2); break;
case 4: SET_CTXS(s, above, col, 4); break;
case 8: SET_CTXS(s, above, col, 8); break;
}
switch (ff_vp9_bwh_tab[1][b->bs][1]) {
case 1: SET_CTXS(td, left, row7, 1); break;
case 2: SET_CTXS(td, left, row7, 2); break;
case 4: SET_CTXS(td, left, row7, 4); break;
case 8: SET_CTXS(td, left, row7, 8); break;
}
#undef SPLAT_CTX
#undef SET_CTXS
if (!s->s.h.keyframe && !s->s.h.intraonly) {
if (b->bs > BS_8x8) {
int mv0 = AV_RN32A(&b->mv[3][0]), mv1 = AV_RN32A(&b->mv[3][1]);
AV_COPY32(&td->left_mv_ctx[row7 * 2 + 0][0], &b->mv[1][0]);
AV_COPY32(&td->left_mv_ctx[row7 * 2 + 0][1], &b->mv[1][1]);
AV_WN32A(&td->left_mv_ctx[row7 * 2 + 1][0], mv0);
AV_WN32A(&td->left_mv_ctx[row7 * 2 + 1][1], mv1);
AV_COPY32(&s->above_mv_ctx[col * 2 + 0][0], &b->mv[2][0]);
AV_COPY32(&s->above_mv_ctx[col * 2 + 0][1], &b->mv[2][1]);
AV_WN32A(&s->above_mv_ctx[col * 2 + 1][0], mv0);
AV_WN32A(&s->above_mv_ctx[col * 2 + 1][1], mv1);
} else {
int n, mv0 = AV_RN32A(&b->mv[3][0]), mv1 = AV_RN32A(&b->mv[3][1]);
for (n = 0; n < w4 * 2; n++) {
AV_WN32A(&s->above_mv_ctx[col * 2 + n][0], mv0);
AV_WN32A(&s->above_mv_ctx[col * 2 + n][1], mv1);
}
for (n = 0; n < h4 * 2; n++) {
AV_WN32A(&td->left_mv_ctx[row7 * 2 + n][0], mv0);
AV_WN32A(&td->left_mv_ctx[row7 * 2 + n][1], mv1);
}
}
}
// FIXME kinda ugly
for (y = 0; y < h4; y++) {
int x, o = (row + y) * s->sb_cols * 8 + col;
VP9mvrefPair *mv = &s->s.frames[CUR_FRAME].mv[o];
if (b->intra) {
for (x = 0; x < w4; x++) {
mv[x].ref[0] =
mv[x].ref[1] = -1;
}
} else if (b->comp) {
for (x = 0; x < w4; x++) {
mv[x].ref[0] = b->ref[0];
mv[x].ref[1] = b->ref[1];
AV_COPY32(&mv[x].mv[0], &b->mv[3][0]);
AV_COPY32(&mv[x].mv[1], &b->mv[3][1]);
}
} else {
for (x = 0; x < w4; x++) {
mv[x].ref[0] = b->ref[0];
mv[x].ref[1] = -1;
AV_COPY32(&mv[x].mv[0], &b->mv[3][0]);
}
}
}
}
// FIXME merge cnt/eob arguments?
static av_always_inline int
decode_coeffs_b_generic(VPXRangeCoder *c, int16_t *coef, int n_coeffs,
int is_tx32x32, int is8bitsperpixel, int bpp, unsigned (*cnt)[6][3],
unsigned (*eob)[6][2], const uint8_t (*p)[6][11],
int nnz, const int16_t *scan, const int16_t (*nb)[2],
const int16_t *band_counts, const int16_t *qmul)
{
int i = 0, band = 0, band_left = band_counts[band];
const uint8_t *tp = p[0][nnz];
uint8_t cache[1024];
do {
int val, rc;
val = vpx_rac_get_prob_branchy(c, tp[0]); // eob
eob[band][nnz][val]++;
if (!val)
break;
skip_eob:
if (!vpx_rac_get_prob_branchy(c, tp[1])) { // zero
cnt[band][nnz][0]++;
if (!--band_left)
band_left = band_counts[++band];
cache[scan[i]] = 0;
nnz = (1 + cache[nb[i][0]] + cache[nb[i][1]]) >> 1;
tp = p[band][nnz];
if (++i == n_coeffs)
break; //invalid input; blocks should end with EOB
goto skip_eob;
}
rc = scan[i];
if (!vpx_rac_get_prob_branchy(c, tp[2])) { // one
cnt[band][nnz][1]++;
val = 1;
cache[rc] = 1;
} else {
cnt[band][nnz][2]++;
if (!vpx_rac_get_prob_branchy(c, tp[3])) { // 2, 3, 4
if (!vpx_rac_get_prob_branchy(c, tp[4])) {
cache[rc] = val = 2;
} else {
val = 3 + vpx_rac_get_prob(c, tp[5]);
cache[rc] = 3;
}
} else if (!vpx_rac_get_prob_branchy(c, tp[6])) { // cat1/2
cache[rc] = 4;
if (!vpx_rac_get_prob_branchy(c, tp[7])) {
val = vpx_rac_get_prob(c, 159) + 5;
} else {
val = (vpx_rac_get_prob(c, 165) << 1) + 7;
val += vpx_rac_get_prob(c, 145);
}
} else { // cat 3-6
cache[rc] = 5;
if (!vpx_rac_get_prob_branchy(c, tp[8])) {
if (!vpx_rac_get_prob_branchy(c, tp[9])) {
val = 11 + (vpx_rac_get_prob(c, 173) << 2);
val += (vpx_rac_get_prob(c, 148) << 1);
val += vpx_rac_get_prob(c, 140);
} else {
val = 19 + (vpx_rac_get_prob(c, 176) << 3);
val += (vpx_rac_get_prob(c, 155) << 2);
val += (vpx_rac_get_prob(c, 140) << 1);
val += vpx_rac_get_prob(c, 135);
}
} else if (!vpx_rac_get_prob_branchy(c, tp[10])) {
val = (vpx_rac_get_prob(c, 180) << 4) + 35;
val += (vpx_rac_get_prob(c, 157) << 3);
val += (vpx_rac_get_prob(c, 141) << 2);
val += (vpx_rac_get_prob(c, 134) << 1);
val += vpx_rac_get_prob(c, 130);
} else {
val = 67;
if (!is8bitsperpixel) {
if (bpp == 12) {
val += vpx_rac_get_prob(c, 255) << 17;
val += vpx_rac_get_prob(c, 255) << 16;
}
val += (vpx_rac_get_prob(c, 255) << 15);
val += (vpx_rac_get_prob(c, 255) << 14);
}
val += (vpx_rac_get_prob(c, 254) << 13);
val += (vpx_rac_get_prob(c, 254) << 12);
val += (vpx_rac_get_prob(c, 254) << 11);
val += (vpx_rac_get_prob(c, 252) << 10);
val += (vpx_rac_get_prob(c, 249) << 9);
val += (vpx_rac_get_prob(c, 243) << 8);
val += (vpx_rac_get_prob(c, 230) << 7);
val += (vpx_rac_get_prob(c, 196) << 6);
val += (vpx_rac_get_prob(c, 177) << 5);
val += (vpx_rac_get_prob(c, 153) << 4);
val += (vpx_rac_get_prob(c, 140) << 3);
val += (vpx_rac_get_prob(c, 133) << 2);
val += (vpx_rac_get_prob(c, 130) << 1);
val += vpx_rac_get_prob(c, 129);
}
}
}
#define STORE_COEF(c, i, v) do { \
if (is8bitsperpixel) { \
c[i] = v; \
} else { \
AV_WN32A(&c[i * 2], v); \
} \
} while (0)
if (!--band_left)
band_left = band_counts[++band];
if (is_tx32x32)
STORE_COEF(coef, rc, (int)((vp89_rac_get(c) ? -val : val) * (unsigned)qmul[!!i]) / 2);
else
STORE_COEF(coef, rc, (vp89_rac_get(c) ? -val : val) * (unsigned)qmul[!!i]);
nnz = (1 + cache[nb[i][0]] + cache[nb[i][1]]) >> 1;
tp = p[band][nnz];
} while (++i < n_coeffs);
return i;
}
static int decode_coeffs_b_8bpp(VP9TileData *td, int16_t *coef, int n_coeffs,
unsigned (*cnt)[6][3], unsigned (*eob)[6][2],
const uint8_t (*p)[6][11], int nnz, const int16_t *scan,
const int16_t (*nb)[2], const int16_t *band_counts,
const int16_t *qmul)
{
return decode_coeffs_b_generic(td->c, coef, n_coeffs, 0, 1, 8, cnt, eob, p,
nnz, scan, nb, band_counts, qmul);
}
static int decode_coeffs_b32_8bpp(VP9TileData *td, int16_t *coef, int n_coeffs,
unsigned (*cnt)[6][3], unsigned (*eob)[6][2],
const uint8_t (*p)[6][11], int nnz, const int16_t *scan,
const int16_t (*nb)[2], const int16_t *band_counts,
const int16_t *qmul)
{
return decode_coeffs_b_generic(td->c, coef, n_coeffs, 1, 1, 8, cnt, eob, p,
nnz, scan, nb, band_counts, qmul);
}
static int decode_coeffs_b_16bpp(VP9TileData *td, int16_t *coef, int n_coeffs,
unsigned (*cnt)[6][3], unsigned (*eob)[6][2],
const uint8_t (*p)[6][11], int nnz, const int16_t *scan,
const int16_t (*nb)[2], const int16_t *band_counts,
const int16_t *qmul)
{
return decode_coeffs_b_generic(td->c, coef, n_coeffs, 0, 0, td->s->s.h.bpp, cnt, eob, p,
nnz, scan, nb, band_counts, qmul);
}
static int decode_coeffs_b32_16bpp(VP9TileData *td, int16_t *coef, int n_coeffs,
unsigned (*cnt)[6][3], unsigned (*eob)[6][2],
const uint8_t (*p)[6][11], int nnz, const int16_t *scan,
const int16_t (*nb)[2], const int16_t *band_counts,
const int16_t *qmul)
{
return decode_coeffs_b_generic(td->c, coef, n_coeffs, 1, 0, td->s->s.h.bpp, cnt, eob, p,
nnz, scan, nb, band_counts, qmul);
}
static av_always_inline int decode_coeffs(VP9TileData *td, int is8bitsperpixel)
{
const VP9Context *s = td->s;
VP9Block *b = td->b;
int row = td->row, col = td->col;
const uint8_t (*p)[6][11] = s->prob.coef[b->tx][0 /* y */][!b->intra];
unsigned (*c)[6][3] = td->counts.coef[b->tx][0 /* y */][!b->intra];
unsigned (*e)[6][2] = td->counts.eob[b->tx][0 /* y */][!b->intra];
int w4 = ff_vp9_bwh_tab[1][b->bs][0] << 1, h4 = ff_vp9_bwh_tab[1][b->bs][1] << 1;
int end_x = FFMIN(2 * (s->cols - col), w4);
int end_y = FFMIN(2 * (s->rows - row), h4);
int n, pl, x, y, ret;
const int16_t (*qmul)[2] = s->s.h.segmentation.feat[b->seg_id].qmul;
int tx = 4 * s->s.h.lossless + b->tx;
const int16_t * const *yscans = ff_vp9_scans[tx];
const int16_t (* const * ynbs)[2] = ff_vp9_scans_nb[tx];
const int16_t *uvscan = ff_vp9_scans[b->uvtx][DCT_DCT];
const int16_t (*uvnb)[2] = ff_vp9_scans_nb[b->uvtx][DCT_DCT];
uint8_t *a = &s->above_y_nnz_ctx[col * 2];
uint8_t *l = &td->left_y_nnz_ctx[(row & 7) << 1];
static const int16_t band_counts[4][8] = {
{ 1, 2, 3, 4, 3, 16 - 13 },
{ 1, 2, 3, 4, 11, 64 - 21 },
{ 1, 2, 3, 4, 11, 256 - 21 },
{ 1, 2, 3, 4, 11, 1024 - 21 },
};
const int16_t *y_band_counts = band_counts[b->tx];
const int16_t *uv_band_counts = band_counts[b->uvtx];
int bytesperpixel = is8bitsperpixel ? 1 : 2;
int total_coeff = 0;
#define MERGE(la, end, step, rd) \
for (n = 0; n < end; n += step) \
la[n] = !!rd(&la[n])
#define MERGE_CTX(step, rd) \
do { \
MERGE(l, end_y, step, rd); \
MERGE(a, end_x, step, rd); \
} while (0)
#define DECODE_Y_COEF_LOOP(step, mode_index, v) \
for (n = 0, y = 0; y < end_y; y += step) { \
for (x = 0; x < end_x; x += step, n += step * step) { \
enum TxfmType txtp = ff_vp9_intra_txfm_type[b->mode[mode_index]]; \
ret = (is8bitsperpixel ? decode_coeffs_b##v##_8bpp : decode_coeffs_b##v##_16bpp) \
(td, td->block + 16 * n * bytesperpixel, 16 * step * step, \
c, e, p, a[x] + l[y], yscans[txtp], \
ynbs[txtp], y_band_counts, qmul[0]); \
a[x] = l[y] = !!ret; \
total_coeff |= !!ret; \
if (step >= 4) { \
AV_WN16A(&td->eob[n], ret); \
} else { \
td->eob[n] = ret; \
} \
} \
}
#define SPLAT(la, end, step, cond) \
if (step == 2) { \
for (n = 1; n < end; n += step) \
la[n] = la[n - 1]; \
} else if (step == 4) { \
if (cond) { \
for (n = 0; n < end; n += step) \
AV_WN32A(&la[n], la[n] * 0x01010101); \
} else { \
for (n = 0; n < end; n += step) \
memset(&la[n + 1], la[n], FFMIN(end - n - 1, 3)); \
} \
} else /* step == 8 */ { \
if (cond) { \
if (HAVE_FAST_64BIT) { \
for (n = 0; n < end; n += step) \
AV_WN64A(&la[n], la[n] * 0x0101010101010101ULL); \
} else { \
for (n = 0; n < end; n += step) { \
uint32_t v32 = la[n] * 0x01010101; \
AV_WN32A(&la[n], v32); \
AV_WN32A(&la[n + 4], v32); \
} \
} \
} else { \
for (n = 0; n < end; n += step) \
memset(&la[n + 1], la[n], FFMIN(end - n - 1, 7)); \
} \
}
#define SPLAT_CTX(step) \
do { \
SPLAT(a, end_x, step, end_x == w4); \
SPLAT(l, end_y, step, end_y == h4); \
} while (0)
/* y tokens */
switch (b->tx) {
case TX_4X4:
DECODE_Y_COEF_LOOP(1, b->bs > BS_8x8 ? n : 0,);
break;
case TX_8X8:
MERGE_CTX(2, AV_RN16A);
DECODE_Y_COEF_LOOP(2, 0,);
SPLAT_CTX(2);
break;
case TX_16X16:
MERGE_CTX(4, AV_RN32A);
DECODE_Y_COEF_LOOP(4, 0,);
SPLAT_CTX(4);
break;
case TX_32X32:
MERGE_CTX(8, AV_RN64A);
DECODE_Y_COEF_LOOP(8, 0, 32);
SPLAT_CTX(8);
break;
}
#define DECODE_UV_COEF_LOOP(step, v) \
for (n = 0, y = 0; y < end_y; y += step) { \
for (x = 0; x < end_x; x += step, n += step * step) { \
ret = (is8bitsperpixel ? decode_coeffs_b##v##_8bpp : decode_coeffs_b##v##_16bpp) \
(td, td->uvblock[pl] + 16 * n * bytesperpixel, \
16 * step * step, c, e, p, a[x] + l[y], \
uvscan, uvnb, uv_band_counts, qmul[1]); \
a[x] = l[y] = !!ret; \
total_coeff |= !!ret; \
if (step >= 4) { \
AV_WN16A(&td->uveob[pl][n], ret); \
} else { \
td->uveob[pl][n] = ret; \
} \
} \
}
p = s->prob.coef[b->uvtx][1 /* uv */][!b->intra];
c = td->counts.coef[b->uvtx][1 /* uv */][!b->intra];
e = td->counts.eob[b->uvtx][1 /* uv */][!b->intra];
w4 >>= s->ss_h;
end_x >>= s->ss_h;
h4 >>= s->ss_v;
end_y >>= s->ss_v;
for (pl = 0; pl < 2; pl++) {
a = &s->above_uv_nnz_ctx[pl][col << !s->ss_h];
l = &td->left_uv_nnz_ctx[pl][(row & 7) << !s->ss_v];
switch (b->uvtx) {
case TX_4X4:
DECODE_UV_COEF_LOOP(1,);
break;
case TX_8X8:
MERGE_CTX(2, AV_RN16A);
DECODE_UV_COEF_LOOP(2,);
SPLAT_CTX(2);
break;
case TX_16X16:
MERGE_CTX(4, AV_RN32A);
DECODE_UV_COEF_LOOP(4,);
SPLAT_CTX(4);
break;
case TX_32X32:
MERGE_CTX(8, AV_RN64A);
DECODE_UV_COEF_LOOP(8, 32);
SPLAT_CTX(8);
break;
}
}
return total_coeff;
}
static int decode_coeffs_8bpp(VP9TileData *td)
{
return decode_coeffs(td, 1);
}
static int decode_coeffs_16bpp(VP9TileData *td)
{
return decode_coeffs(td, 0);
}
static av_always_inline void mask_edges(uint8_t (*mask)[8][4], int ss_h, int ss_v,
int row_and_7, int col_and_7,
int w, int h, int col_end, int row_end,
enum TxfmMode tx, int skip_inter)
{
static const unsigned wide_filter_col_mask[2] = { 0x11, 0x01 };
static const unsigned wide_filter_row_mask[2] = { 0x03, 0x07 };
// FIXME I'm pretty sure all loops can be replaced by a single LUT if
// we make VP9Filter.mask uint64_t (i.e. row/col all single variable)
// and make the LUT 5-indexed (bl, bp, is_uv, tx and row/col), and then
// use row_and_7/col_and_7 as shifts (1*col_and_7+8*row_and_7)
// the intended behaviour of the vp9 loopfilter is to work on 8-pixel
// edges. This means that for UV, we work on two subsampled blocks at
// a time, and we only use the topleft block's mode information to set
// things like block strength. Thus, for any block size smaller than
// 16x16, ignore the odd portion of the block.
if (tx == TX_4X4 && (ss_v | ss_h)) {
if (h == ss_v) {
if (row_and_7 & 1)
return;
if (!row_end)
h += 1;
}
if (w == ss_h) {
if (col_and_7 & 1)
return;
if (!col_end)
w += 1;
}
}
if (tx == TX_4X4 && !skip_inter) {
int t = 1 << col_and_7, m_col = (t << w) - t, y;
// on 32-px edges, use the 8-px wide loopfilter; else, use 4-px wide
int m_row_8 = m_col & wide_filter_col_mask[ss_h], m_row_4 = m_col - m_row_8;
for (y = row_and_7; y < h + row_and_7; y++) {
int col_mask_id = 2 - !(y & wide_filter_row_mask[ss_v]);
mask[0][y][1] |= m_row_8;
mask[0][y][2] |= m_row_4;
// for odd lines, if the odd col is not being filtered,
// skip odd row also:
// .---. <-- a
// | |
// |___| <-- b
// ^ ^
// c d
//
// if a/c are even row/col and b/d are odd, and d is skipped,
// e.g. right edge of size-66x66.webm, then skip b also (bug)
if ((ss_h & ss_v) && (col_end & 1) && (y & 1)) {
mask[1][y][col_mask_id] |= (t << (w - 1)) - t;
} else {
mask[1][y][col_mask_id] |= m_col;
}
if (!ss_h)
mask[0][y][3] |= m_col;
if (!ss_v) {
if (ss_h && (col_end & 1))
mask[1][y][3] |= (t << (w - 1)) - t;
else
mask[1][y][3] |= m_col;
}
}
} else {
int y, t = 1 << col_and_7, m_col = (t << w) - t;
if (!skip_inter) {
int mask_id = (tx == TX_8X8);
int l2 = tx + ss_h - 1, step1d;
static const unsigned masks[4] = { 0xff, 0x55, 0x11, 0x01 };
int m_row = m_col & masks[l2];
// at odd UV col/row edges tx16/tx32 loopfilter edges, force
// 8wd loopfilter to prevent going off the visible edge.
if (ss_h && tx > TX_8X8 && (w ^ (w - 1)) == 1) {
int m_row_16 = ((t << (w - 1)) - t) & masks[l2];
int m_row_8 = m_row - m_row_16;
for (y = row_and_7; y < h + row_and_7; y++) {
mask[0][y][0] |= m_row_16;
mask[0][y][1] |= m_row_8;
}
} else {
for (y = row_and_7; y < h + row_and_7; y++)
mask[0][y][mask_id] |= m_row;
}
l2 = tx + ss_v - 1;
step1d = 1 << l2;
if (ss_v && tx > TX_8X8 && (h ^ (h - 1)) == 1) {
for (y = row_and_7; y < h + row_and_7 - 1; y += step1d)
mask[1][y][0] |= m_col;
if (y - row_and_7 == h - 1)
mask[1][y][1] |= m_col;
} else {
for (y = row_and_7; y < h + row_and_7; y += step1d)
mask[1][y][mask_id] |= m_col;
}
} else if (tx != TX_4X4) {
int mask_id;
mask_id = (tx == TX_8X8) || (h == ss_v);
mask[1][row_and_7][mask_id] |= m_col;
mask_id = (tx == TX_8X8) || (w == ss_h);
for (y = row_and_7; y < h + row_and_7; y++)
mask[0][y][mask_id] |= t;
} else {
int t8 = t & wide_filter_col_mask[ss_h], t4 = t - t8;
for (y = row_and_7; y < h + row_and_7; y++) {
mask[0][y][2] |= t4;
mask[0][y][1] |= t8;
}
mask[1][row_and_7][2 - !(row_and_7 & wide_filter_row_mask[ss_v])] |= m_col;
}
}
}
void ff_vp9_decode_block(VP9TileData *td, int row, int col,
VP9Filter *lflvl, ptrdiff_t yoff, ptrdiff_t uvoff,
enum BlockLevel bl, enum BlockPartition bp)
{
const VP9Context *s = td->s;
VP9Block *b = td->b;
enum BlockSize bs = bl * 3 + bp;
int bytesperpixel = s->bytesperpixel;
int w4 = ff_vp9_bwh_tab[1][bs][0], h4 = ff_vp9_bwh_tab[1][bs][1], lvl;
int emu[2];
AVFrame *f = s->s.frames[CUR_FRAME].tf.f;
td->row = row;
td->row7 = row & 7;
td->col = col;
td->col7 = col & 7;
td->min_mv.x = -(128 + col * 64);
td->min_mv.y = -(128 + row * 64);
td->max_mv.x = 128 + (s->cols - col - w4) * 64;
td->max_mv.y = 128 + (s->rows - row - h4) * 64;
if (s->pass < 2) {
b->bs = bs;
b->bl = bl;
b->bp = bp;
decode_mode(td);
b->uvtx = b->tx - ((s->ss_h && w4 * 2 == (1 << b->tx)) ||
(s->ss_v && h4 * 2 == (1 << b->tx)));
if (td->block_structure) {
td->block_structure[td->nb_block_structure].row = row;
td->block_structure[td->nb_block_structure].col = col;
td->block_structure[td->nb_block_structure].block_size_idx_x = av_log2(w4);
td->block_structure[td->nb_block_structure].block_size_idx_y = av_log2(h4);
td->nb_block_structure++;
}
if (!b->skip) {
int has_coeffs;
if (bytesperpixel == 1) {
has_coeffs = decode_coeffs_8bpp(td);
} else {
has_coeffs = decode_coeffs_16bpp(td);
}
if (!has_coeffs && b->bs <= BS_8x8 && !b->intra) {
b->skip = 1;
memset(&s->above_skip_ctx[col], 1, w4);
memset(&td->left_skip_ctx[td->row7], 1, h4);
}
} else {
int row7 = td->row7;
#define SPLAT_ZERO_CTX(v, n) \
switch (n) { \
case 1: v = 0; break; \
case 2: AV_ZERO16(&v); break; \
case 4: AV_ZERO32(&v); break; \
case 8: AV_ZERO64(&v); break; \
case 16: AV_ZERO128(&v); break; \
}
#define SPLAT_ZERO_YUV(dir, var, off, n, dir2) \
do { \
SPLAT_ZERO_CTX(dir##_y_##var[off * 2], n * 2); \
if (s->ss_##dir2) { \
SPLAT_ZERO_CTX(dir##_uv_##var[0][off], n); \
SPLAT_ZERO_CTX(dir##_uv_##var[1][off], n); \
} else { \
SPLAT_ZERO_CTX(dir##_uv_##var[0][off * 2], n * 2); \
SPLAT_ZERO_CTX(dir##_uv_##var[1][off * 2], n * 2); \
} \
} while (0)
switch (w4) {
case 1: SPLAT_ZERO_YUV(s->above, nnz_ctx, col, 1, h); break;
case 2: SPLAT_ZERO_YUV(s->above, nnz_ctx, col, 2, h); break;
case 4: SPLAT_ZERO_YUV(s->above, nnz_ctx, col, 4, h); break;
case 8: SPLAT_ZERO_YUV(s->above, nnz_ctx, col, 8, h); break;
}
switch (h4) {
case 1: SPLAT_ZERO_YUV(td->left, nnz_ctx, row7, 1, v); break;
case 2: SPLAT_ZERO_YUV(td->left, nnz_ctx, row7, 2, v); break;
case 4: SPLAT_ZERO_YUV(td->left, nnz_ctx, row7, 4, v); break;
case 8: SPLAT_ZERO_YUV(td->left, nnz_ctx, row7, 8, v); break;
}
}
if (s->pass == 1) {
s->td[0].b++;
s->td[0].block += w4 * h4 * 64 * bytesperpixel;
s->td[0].uvblock[0] += w4 * h4 * 64 * bytesperpixel >> (s->ss_h + s->ss_v);
s->td[0].uvblock[1] += w4 * h4 * 64 * bytesperpixel >> (s->ss_h + s->ss_v);
s->td[0].eob += 4 * w4 * h4;
s->td[0].uveob[0] += 4 * w4 * h4 >> (s->ss_h + s->ss_v);
s->td[0].uveob[1] += 4 * w4 * h4 >> (s->ss_h + s->ss_v);
return;
}
}
// emulated overhangs if the stride of the target buffer can't hold. This
// makes it possible to support emu-edge and so on even if we have large block
// overhangs
emu[0] = (col + w4) * 8 * bytesperpixel > f->linesize[0] ||
(row + h4) > s->rows;
emu[1] = ((col + w4) * 8 >> s->ss_h) * bytesperpixel > f->linesize[1] ||
(row + h4) > s->rows;
if (emu[0]) {
td->dst[0] = td->tmp_y;
td->y_stride = 128;
} else {
td->dst[0] = f->data[0] + yoff;
td->y_stride = f->linesize[0];
}
if (emu[1]) {
td->dst[1] = td->tmp_uv[0];
td->dst[2] = td->tmp_uv[1];
td->uv_stride = 128;
} else {
td->dst[1] = f->data[1] + uvoff;
td->dst[2] = f->data[2] + uvoff;
td->uv_stride = f->linesize[1];
}
if (b->intra) {
if (s->s.h.bpp > 8) {
ff_vp9_intra_recon_16bpp(td, yoff, uvoff);
} else {
ff_vp9_intra_recon_8bpp(td, yoff, uvoff);
}
} else {
if (s->s.h.bpp > 8) {
ff_vp9_inter_recon_16bpp(td);
} else {
ff_vp9_inter_recon_8bpp(td);
}
}
if (emu[0]) {
int w = FFMIN(s->cols - col, w4) * 8, h = FFMIN(s->rows - row, h4) * 8, n, o = 0;
for (n = 0; o < w; n++) {
int bw = 64 >> n;
av_assert2(n <= 4);
if (w & bw) {
s->dsp.mc[n][0][0][0][0](f->data[0] + yoff + o * bytesperpixel, f->linesize[0],
td->tmp_y + o * bytesperpixel, 128, h, 0, 0);
o += bw;
}
}
}
if (emu[1]) {
int w = FFMIN(s->cols - col, w4) * 8 >> s->ss_h;
int h = FFMIN(s->rows - row, h4) * 8 >> s->ss_v, n, o = 0;
for (n = s->ss_h; o < w; n++) {
int bw = 64 >> n;
av_assert2(n <= 4);
if (w & bw) {
s->dsp.mc[n][0][0][0][0](f->data[1] + uvoff + o * bytesperpixel, f->linesize[1],
td->tmp_uv[0] + o * bytesperpixel, 128, h, 0, 0);
s->dsp.mc[n][0][0][0][0](f->data[2] + uvoff + o * bytesperpixel, f->linesize[2],
td->tmp_uv[1] + o * bytesperpixel, 128, h, 0, 0);
o += bw;
}
}
}
// pick filter level and find edges to apply filter to
if (s->s.h.filter.level &&
(lvl = s->s.h.segmentation.feat[b->seg_id].lflvl[b->intra ? 0 : b->ref[0] + 1]
[b->mode[3] != ZEROMV]) > 0) {
int x_end = FFMIN(s->cols - col, w4), y_end = FFMIN(s->rows - row, h4);
int skip_inter = !b->intra && b->skip, col7 = td->col7, row7 = td->row7;
setctx_2d(&lflvl->level[row7 * 8 + col7], w4, h4, 8, lvl);
mask_edges(lflvl->mask[0], 0, 0, row7, col7, x_end, y_end, 0, 0, b->tx, skip_inter);
if (s->ss_h || s->ss_v)
mask_edges(lflvl->mask[1], s->ss_h, s->ss_v, row7, col7, x_end, y_end,
s->cols & 1 && col + w4 >= s->cols ? s->cols & 7 : 0,
s->rows & 1 && row + h4 >= s->rows ? s->rows & 7 : 0,
b->uvtx, skip_inter);
}
if (s->pass == 2) {
s->td[0].b++;
s->td[0].block += w4 * h4 * 64 * bytesperpixel;
s->td[0].uvblock[0] += w4 * h4 * 64 * bytesperpixel >> (s->ss_v + s->ss_h);
s->td[0].uvblock[1] += w4 * h4 * 64 * bytesperpixel >> (s->ss_v + s->ss_h);
s->td[0].eob += 4 * w4 * h4;
s->td[0].uveob[0] += 4 * w4 * h4 >> (s->ss_v + s->ss_h);
s->td[0].uveob[1] += 4 * w4 * h4 >> (s->ss_v + s->ss_h);
}
}
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