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FFmpeg/libavcodec/vp9block.c
Ronald S. Bultje 72ca830f51 lavc: VP9 decoder 
Originally written by Ronald S. Bultje <rsbultje@gmail.com> and
Clément Bœsch <u@pkh.me>

Further contributions by:
Anton Khirnov <anton@khirnov.net>
Diego Biurrun <diego@biurrun.de>
Luca Barbato <lu_zero@gentoo.org>
Martin Storsjö <martin@martin.st>

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
2013-11-15 10:16:28 +01:00

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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 Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avassert.h"
#include "avcodec.h"
#include "get_bits.h"
#include "internal.h"
#include "videodsp.h"
#include "vp56.h"
#include "vp9.h"
#include "vp9data.h"
static const uint8_t bwh_tab[2][N_BS_SIZES][2] = {
{
{ 16, 16 }, { 16, 8 }, { 8, 16 }, { 8, 8 }, { 8, 4 }, { 4, 8 },
{ 4, 4 }, { 4, 2 }, { 2, 4 }, { 2, 2 }, { 2, 1 }, { 1, 2 }, { 1, 1 },
}, {
{ 8, 8 }, { 8, 4 }, { 4, 8 }, { 4, 4 }, { 4, 2 }, { 2, 4 },
{ 2, 2 }, { 2, 1 }, { 1, 2 }, { 1, 1 }, { 1, 1 }, { 1, 1 }, { 1, 1 },
}
};
// differential forward probability updates
static void decode_mode(VP9Context *s, VP9Block *const b)
{
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
};
int row = b->row, col = b->col, row7 = b->row7;
enum TxfmMode max_tx = max_tx_for_bl_bp[b->bs];
int w4 = FFMIN(s->cols - col, bwh_tab[1][b->bs][0]);
int h4 = FFMIN(s->rows - row, bwh_tab[1][b->bs][1]);
int have_a = row > 0, have_l = col > s->tiling.tile_col_start;
int y;
if (!s->segmentation.enabled) {
b->seg_id = 0;
} else if (s->keyframe || s->intraonly) {
b->seg_id = s->segmentation.update_map ?
vp8_rac_get_tree(&s->c, ff_vp9_segmentation_tree, s->prob.seg) : 0;
} else if (!s->segmentation.update_map ||
(s->segmentation.temporal &&
vp56_rac_get_prob_branchy(&s->c,
s->prob.segpred[s->above_segpred_ctx[col] +
s->left_segpred_ctx[row7]]))) {
int pred = 8, x;
for (y = 0; y < h4; y++)
for (x = 0; x < w4; x++)
pred = FFMIN(pred,
s->segmentation_map[(y + row) * 8 * s->sb_cols + x + col]);
b->seg_id = pred;
memset(&s->above_segpred_ctx[col], 1, w4);
memset(&s->left_segpred_ctx[row7], 1, h4);
} else {
b->seg_id = vp8_rac_get_tree(&s->c, ff_vp9_segmentation_tree,
s->prob.seg);
memset(&s->above_segpred_ctx[col], 0, w4);
memset(&s->left_segpred_ctx[row7], 0, h4);
}
if ((s->segmentation.enabled && s->segmentation.update_map) || s->keyframe) {
for (y = 0; y < h4; y++)
memset(&s->segmentation_map[(y + row) * 8 * s->sb_cols + col],
b->seg_id, w4);
}
b->skip = s->segmentation.enabled &&
s->segmentation.feat[b->seg_id].skip_enabled;
if (!b->skip) {
int c = s->left_skip_ctx[row7] + s->above_skip_ctx[col];
b->skip = vp56_rac_get_prob(&s->c, s->prob.p.skip[c]);
s->counts.skip[c][b->skip]++;
}
if (s->keyframe || s->intraonly) {
b->intra = 1;
} else if (s->segmentation.feat[b->seg_id].ref_enabled) {
b->intra = !s->segmentation.feat[b->seg_id].ref_val;
} else {
int c, bit;
if (have_a && have_l) {
c = s->above_intra_ctx[col] + s->left_intra_ctx[row7];
c += (c == 2);
} else {
c = have_a ? 2 * s->above_intra_ctx[col] :
have_l ? 2 * s->left_intra_ctx[row7] : 0;
}
bit = vp56_rac_get_prob(&s->c, s->prob.p.intra[c]);
s->counts.intra[c][bit]++;
b->intra = !bit;
}
if ((b->intra || !b->skip) && s->txfmmode == TX_SWITCHABLE) {
int c;
if (have_a) {
if (have_l) {
c = (s->above_skip_ctx[col] ? max_tx :
s->above_txfm_ctx[col]) +
(s->left_skip_ctx[row7] ? max_tx :
s->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 = s->left_skip_ctx[row7] ? 1 :
(s->left_txfm_ctx[row7] * 2 > max_tx);
} else {
c = 1;
}
switch (max_tx) {
case TX_32X32:
b->tx = vp56_rac_get_prob(&s->c, s->prob.p.tx32p[c][0]);
if (b->tx) {
b->tx += vp56_rac_get_prob(&s->c, s->prob.p.tx32p[c][1]);
if (b->tx == 2)
b->tx += vp56_rac_get_prob(&s->c, s->prob.p.tx32p[c][2]);
}
s->counts.tx32p[c][b->tx]++;
break;
case TX_16X16:
b->tx = vp56_rac_get_prob(&s->c, s->prob.p.tx16p[c][0]);
if (b->tx)
b->tx += vp56_rac_get_prob(&s->c, s->prob.p.tx16p[c][1]);
s->counts.tx16p[c][b->tx]++;
break;
case TX_8X8:
b->tx = vp56_rac_get_prob(&s->c, s->prob.p.tx8p[c]);
s->counts.tx8p[c][b->tx]++;
break;
case TX_4X4:
b->tx = TX_4X4;
break;
}
} else {
b->tx = FFMIN(max_tx, s->txfmmode);
}
if (s->keyframe || s->intraonly) {
uint8_t *a = &s->above_mode_ctx[col * 2];
uint8_t *l = &s->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] = vp8_rac_get_tree(&s->c, ff_vp9_intramode_tree,
ff_vp9_default_kf_ymode_probs[a[0]][l[0]]);
if (b->bs != BS_8x4) {
b->mode[1] = vp8_rac_get_tree(&s->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] = vp8_rac_get_tree(&s->c, ff_vp9_intramode_tree,
ff_vp9_default_kf_ymode_probs[a[0]][l[1]]);
if (b->bs != BS_8x4) {
b->mode[3] = vp8_rac_get_tree(&s->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] = vp8_rac_get_tree(&s->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], bwh_tab[0][b->bs][0]);
memset(l, b->mode[0], bwh_tab[0][b->bs][1]);
}
b->uvmode = vp8_rac_get_tree(&s->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] = vp8_rac_get_tree(&s->c, ff_vp9_intramode_tree,
s->prob.p.y_mode[0]);
s->counts.y_mode[0][b->mode[0]]++;
if (b->bs != BS_8x4) {
b->mode[1] = vp8_rac_get_tree(&s->c, ff_vp9_intramode_tree,
s->prob.p.y_mode[0]);
s->counts.y_mode[0][b->mode[1]]++;
} else {
b->mode[1] = b->mode[0];
}
if (b->bs != BS_4x8) {
b->mode[2] = vp8_rac_get_tree(&s->c, ff_vp9_intramode_tree,
s->prob.p.y_mode[0]);
s->counts.y_mode[0][b->mode[2]]++;
if (b->bs != BS_8x4) {
b->mode[3] = vp8_rac_get_tree(&s->c, ff_vp9_intramode_tree,
s->prob.p.y_mode[0]);
s->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] = vp8_rac_get_tree(&s->c, ff_vp9_intramode_tree,
s->prob.p.y_mode[sz]);
b->mode[1] =
b->mode[2] =
b->mode[3] = b->mode[0];
s->counts.y_mode[sz][b->mode[3]]++;
}
b->uvmode = vp8_rac_get_tree(&s->c, ff_vp9_intramode_tree,
s->prob.p.uv_mode[b->mode[3]]);
s->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->segmentation.feat[b->seg_id].ref_enabled) {
av_assert2(s->segmentation.feat[b->seg_id].ref_val != 0);
b->comp = 0;
b->ref[0] = s->segmentation.feat[b->seg_id].ref_val - 1;
} else {
// read comp_pred flag
if (s->comppredmode != PRED_SWITCHABLE) {
b->comp = s->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] && s->left_comp_ctx[row7]) {
c = 4;
} else if (s->above_comp_ctx[col]) {
c = 2 + (s->left_intra_ctx[row7] ||
s->left_ref_ctx[row7] == s->fixcompref);
} else if (s->left_comp_ctx[row7]) {
c = 2 + (s->above_intra_ctx[col] ||
s->above_ref_ctx[col] == s->fixcompref);
} else {
c = (!s->above_intra_ctx[col] &&
s->above_ref_ctx[col] == s->fixcompref) ^
(!s->left_intra_ctx[row7] &&
s->left_ref_ctx[row & 7] == s->fixcompref);
}
} else {
c = s->above_comp_ctx[col] ? 3 :
(!s->above_intra_ctx[col] && s->above_ref_ctx[col] == s->fixcompref);
}
} else if (have_l) {
c = s->left_comp_ctx[row7] ? 3 :
(!s->left_intra_ctx[row7] && s->left_ref_ctx[row7] == s->fixcompref);
} else {
c = 1;
}
b->comp = vp56_rac_get_prob(&s->c, s->prob.p.comp[c]);
s->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->signbias[s->fixcompref], var_idx = !fix_idx, c, bit;
b->ref[fix_idx] = s->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 (s->left_intra_ctx[row7]) {
c = 2;
} else {
c = 1 + 2 * (s->left_ref_ctx[row7] != s->varcompref[1]);
}
} else if (s->left_intra_ctx[row7]) {
c = 1 + 2 * (s->above_ref_ctx[col] != s->varcompref[1]);
} else {
int refl = s->left_ref_ctx[row7], refa = s->above_ref_ctx[col];
if (refl == refa && refa == s->varcompref[1]) {
c = 0;
} else if (!s->left_comp_ctx[row7] && !s->above_comp_ctx[col]) {
if ((refa == s->fixcompref && refl == s->varcompref[0]) ||
(refl == s->fixcompref && refa == s->varcompref[0])) {
c = 4;
} else {
c = (refa == refl) ? 3 : 1;
}
} else if (!s->left_comp_ctx[row7]) {
if (refa == s->varcompref[1] && refl != s->varcompref[1]) {
c = 1;
} else {
c = (refl == s->varcompref[1] &&
refa != s->varcompref[1]) ? 2 : 4;
}
} else if (!s->above_comp_ctx[col]) {
if (refl == s->varcompref[1] && refa != s->varcompref[1]) {
c = 1;
} else {
c = (refa == s->varcompref[1] &&
refl != s->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->varcompref[1]);
} else {
c = 3 * (s->above_ref_ctx[col] != s->varcompref[1]);
}
}
} else if (have_l) {
if (s->left_intra_ctx[row7]) {
c = 2;
} else if (s->left_comp_ctx[row7]) {
c = 4 * (s->left_ref_ctx[row7] != s->varcompref[1]);
} else {
c = 3 * (s->left_ref_ctx[row7] != s->varcompref[1]);
}
} else {
c = 2;
}
bit = vp56_rac_get_prob(&s->c, s->prob.p.comp_ref[c]);
b->ref[var_idx] = s->varcompref[bit];
s->counts.comp_ref[c][bit]++;
} else { /* single reference */
int bit, c;
if (have_a && !s->above_intra_ctx[col]) {
if (have_l && !s->left_intra_ctx[row7]) {
if (s->left_comp_ctx[row7]) {
if (s->above_comp_ctx[col]) {
c = 1 + (!s->fixcompref || !s->left_ref_ctx[row7] ||
!s->above_ref_ctx[col]);
} else {
c = (3 * !s->above_ref_ctx[col]) +
(!s->fixcompref || !s->left_ref_ctx[row7]);
}
} else if (s->above_comp_ctx[col]) {
c = (3 * !s->left_ref_ctx[row7]) +
(!s->fixcompref || !s->above_ref_ctx[col]);
} else {
c = 2 * !s->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->fixcompref || !s->above_ref_ctx[col]);
} else {
c = 4 * (!s->above_ref_ctx[col]);
}
} else if (have_l && !s->left_intra_ctx[row7]) {
if (s->left_intra_ctx[row7]) {
c = 2;
} else if (s->left_comp_ctx[row7]) {
c = 1 + (!s->fixcompref || !s->left_ref_ctx[row7]);
} else {
c = 4 * (!s->left_ref_ctx[row7]);
}
} else {
c = 2;
}
bit = vp56_rac_get_prob(&s->c, s->prob.p.single_ref[c][0]);
s->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 (s->left_intra_ctx[row7]) {
if (s->above_intra_ctx[col]) {
c = 2;
} else if (s->above_comp_ctx[col]) {
c = 1 + 2 * (s->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 (s->left_intra_ctx[row7]) {
c = 2;
} else if (s->left_comp_ctx[row7]) {
c = 1 + 2 * (s->fixcompref == 1 ||
s->left_ref_ctx[row7] == 1);
} else if (!s->left_ref_ctx[row7]) {
c = 3;
} else {
c = 4 * (s->left_ref_ctx[row7] == 1);
}
} else if (s->above_comp_ctx[col]) {
if (s->left_comp_ctx[row7]) {
if (s->left_ref_ctx[row7] == s->above_ref_ctx[col]) {
c = 3 * (s->fixcompref == 1 ||
s->left_ref_ctx[row7] == 1);
} else {
c = 2;
}
} else if (!s->left_ref_ctx[row7]) {
c = 1 + 2 * (s->fixcompref == 1 ||
s->above_ref_ctx[col] == 1);
} else {
c = 3 * (s->left_ref_ctx[row7] == 1) +
(s->fixcompref == 1 || s->above_ref_ctx[col] == 1);
}
} else if (s->left_comp_ctx[row7]) {
if (!s->above_ref_ctx[col]) {
c = 1 + 2 * (s->fixcompref == 1 ||
s->left_ref_ctx[row7] == 1);
} else {
c = 3 * (s->above_ref_ctx[col] == 1) +
(s->fixcompref == 1 || s->left_ref_ctx[row7] == 1);
}
} else if (!s->above_ref_ctx[col]) {
if (!s->left_ref_ctx[row7]) {
c = 3;
} else {
c = 4 * (s->left_ref_ctx[row7] == 1);
}
} else if (!s->left_ref_ctx[row7]) {
c = 4 * (s->above_ref_ctx[col] == 1);
} else {
c = 2 * (s->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->fixcompref == 1 || s->above_ref_ctx[col] == 1);
} else {
c = 4 * (s->above_ref_ctx[col] == 1);
}
}
} else if (have_l) {
if (s->left_intra_ctx[row7] ||
(!s->left_comp_ctx[row7] && !s->left_ref_ctx[row7])) {
c = 2;
} else if (s->left_comp_ctx[row7]) {
c = 3 * (s->fixcompref == 1 || s->left_ref_ctx[row7] == 1);
} else {
c = 4 * (s->left_ref_ctx[row7] == 1);
}
} else {
c = 2;
}
bit = vp56_rac_get_prob(&s->c, s->prob.p.single_ref[c][1]);
s->counts.single_ref[c][1][bit]++;
b->ref[0] = 1 + bit;
}
}
}
if (b->bs <= BS_8x8) {
if (s->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]]]
[s->left_mode_ctx[row7 + off[b->bs]]];
b->mode[0] = vp8_rac_get_tree(&s->c, ff_vp9_inter_mode_tree,
s->prob.p.mv_mode[c]);
b->mode[1] =
b->mode[2] =
b->mode[3] = b->mode[0];
s->counts.mv_mode[c][b->mode[0] - 10]++;
}
}
if (s->filtermode == FILTER_SWITCHABLE) {
int c;
if (have_a && s->above_mode_ctx[col] >= NEARESTMV) {
if (have_l && s->left_mode_ctx[row7] >= NEARESTMV) {
c = s->above_filter_ctx[col] == s->left_filter_ctx[row7] ?
s->left_filter_ctx[row7] : 3;
} else {
c = s->above_filter_ctx[col];
}
} else if (have_l && s->left_mode_ctx[row7] >= NEARESTMV) {
c = s->left_filter_ctx[row7];
} else {
c = 3;
}
b->filter = vp8_rac_get_tree(&s->c, ff_vp9_filter_tree,
s->prob.p.filter[c]);
s->counts.filter[c][b->filter]++;
} else {
b->filter = s->filtermode;
}
if (b->bs > BS_8x8) {
int c = inter_mode_ctx_lut[s->above_mode_ctx[col]][s->left_mode_ctx[row7]];
b->mode[0] = vp8_rac_get_tree(&s->c, ff_vp9_inter_mode_tree,
s->prob.p.mv_mode[c]);
s->counts.mv_mode[c][b->mode[0] - 10]++;
ff_vp9_fill_mv(s, b->mv[0], b->mode[0], 0);
if (b->bs != BS_8x4) {
b->mode[1] = vp8_rac_get_tree(&s->c, ff_vp9_inter_mode_tree,
s->prob.p.mv_mode[c]);
s->counts.mv_mode[c][b->mode[1] - 10]++;
ff_vp9_fill_mv(s, 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] = vp8_rac_get_tree(&s->c, ff_vp9_inter_mode_tree,
s->prob.p.mv_mode[c]);
s->counts.mv_mode[c][b->mode[2] - 10]++;
ff_vp9_fill_mv(s, b->mv[2], b->mode[2], 2);
if (b->bs != BS_8x4) {
b->mode[3] = vp8_rac_get_tree(&s->c, ff_vp9_inter_mode_tree,
s->prob.p.mv_mode[c]);
s->counts.mv_mode[c][b->mode[3] - 10]++;
ff_vp9_fill_mv(s, 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(s, 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]);
}
}
// FIXME this can probably be optimized
memset(&s->above_skip_ctx[col], b->skip, w4);
memset(&s->left_skip_ctx[row7], b->skip, h4);
memset(&s->above_txfm_ctx[col], b->tx, w4);
memset(&s->left_txfm_ctx[row7], b->tx, h4);
memset(&s->above_partition_ctx[col], above_ctx[b->bs], w4);
memset(&s->left_partition_ctx[row7], left_ctx[b->bs], h4);
if (!s->keyframe && !s->intraonly) {
memset(&s->above_intra_ctx[col], b->intra, w4);
memset(&s->left_intra_ctx[row7], b->intra, h4);
memset(&s->above_comp_ctx[col], b->comp, w4);
memset(&s->left_comp_ctx[row7], b->comp, h4);
memset(&s->above_mode_ctx[col], b->mode[3], w4);
memset(&s->left_mode_ctx[row7], b->mode[3], h4);
if (s->filtermode == FILTER_SWITCHABLE && !b->intra) {
memset(&s->above_filter_ctx[col], b->filter, w4);
memset(&s->left_filter_ctx[row7], b->filter, h4);
b->filter = ff_vp9_filter_lut[b->filter];
}
if (b->bs > BS_8x8) {
int mv0 = AV_RN32A(&b->mv[3][0]), mv1 = AV_RN32A(&b->mv[3][1]);
AV_COPY32(&s->left_mv_ctx[row7 * 2 + 0][0], &b->mv[1][0]);
AV_COPY32(&s->left_mv_ctx[row7 * 2 + 0][1], &b->mv[1][1]);
AV_WN32A(&s->left_mv_ctx[row7 * 2 + 1][0], mv0);
AV_WN32A(&s->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(&s->left_mv_ctx[row7 * 2 + n][0], mv0);
AV_WN32A(&s->left_mv_ctx[row7 * 2 + n][1], mv1);
}
}
if (!b->intra) { // FIXME write 0xff or -1 if intra, so we can use this
// as a direct check in above branches
int vref = b->ref[b->comp ? s->signbias[s->varcompref[0]] : 0];
memset(&s->above_ref_ctx[col], vref, w4);
memset(&s->left_ref_ctx[row7], vref, h4);
}
}
// FIXME kinda ugly
for (y = 0; y < h4; y++) {
int x, o = (row + y) * s->sb_cols * 8 + col;
if (b->intra) {
for (x = 0; x < w4; x++) {
s->mv[0][o + x].ref[0] =
s->mv[0][o + x].ref[1] = -1;
}
} else if (b->comp) {
for (x = 0; x < w4; x++) {
s->mv[0][o + x].ref[0] = b->ref[0];
s->mv[0][o + x].ref[1] = b->ref[1];
AV_COPY32(&s->mv[0][o + x].mv[0], &b->mv[3][0]);
AV_COPY32(&s->mv[0][o + x].mv[1], &b->mv[3][1]);
}
} else {
for (x = 0; x < w4; x++) {
s->mv[0][o + x].ref[0] = b->ref[0];
s->mv[0][o + x].ref[1] = -1;
AV_COPY32(&s->mv[0][o + x].mv[0], &b->mv[3][0]);
}
}
}
}
// FIXME remove tx argument, and merge cnt/eob arguments?
static int decode_block_coeffs(VP56RangeCoder *c, int16_t *coef, int n_coeffs,
enum TxfmMode tx, unsigned (*cnt)[6][3],
unsigned (*eob)[6][2], 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];
uint8_t *tp = p[0][nnz];
uint8_t cache[1024];
do {
int val, rc;
val = vp56_rac_get_prob_branchy(c, tp[0]); // eob
eob[band][nnz][val]++;
if (!val)
break;
skip_eob:
if (!vp56_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 (!vp56_rac_get_prob_branchy(c, tp[2])) { // one
cnt[band][nnz][1]++;
val = 1;
cache[rc] = 1;
} else {
// fill in p[3-10] (model fill) - only once per frame for each pos
if (!tp[3])
memcpy(&tp[3], ff_vp9_model_pareto8[tp[2]], 8);
cnt[band][nnz][2]++;
if (!vp56_rac_get_prob_branchy(c, tp[3])) { // 2, 3, 4
if (!vp56_rac_get_prob_branchy(c, tp[4])) {
cache[rc] = val = 2;
} else {
val = 3 + vp56_rac_get_prob(c, tp[5]);
cache[rc] = 3;
}
} else if (!vp56_rac_get_prob_branchy(c, tp[6])) { // cat1/2
cache[rc] = 4;
if (!vp56_rac_get_prob_branchy(c, tp[7])) {
val = vp56_rac_get_prob(c, 159) + 5;
} else {
val = (vp56_rac_get_prob(c, 165) << 1) + 7;
val += vp56_rac_get_prob(c, 145);
}
} else { // cat 3-6
cache[rc] = 5;
if (!vp56_rac_get_prob_branchy(c, tp[8])) {
if (!vp56_rac_get_prob_branchy(c, tp[9])) {
val = (vp56_rac_get_prob(c, 173) << 2) + 11;
val += (vp56_rac_get_prob(c, 148) << 1);
val += vp56_rac_get_prob(c, 140);
} else {
val = (vp56_rac_get_prob(c, 176) << 3) + 19;
val += (vp56_rac_get_prob(c, 155) << 2);
val += (vp56_rac_get_prob(c, 140) << 1);
val += vp56_rac_get_prob(c, 135);
}
} else if (!vp56_rac_get_prob_branchy(c, tp[10])) {
val = (vp56_rac_get_prob(c, 180) << 4) + 35;
val += (vp56_rac_get_prob(c, 157) << 3);
val += (vp56_rac_get_prob(c, 141) << 2);
val += (vp56_rac_get_prob(c, 134) << 1);
val += vp56_rac_get_prob(c, 130);
} else {
val = (vp56_rac_get_prob(c, 254) << 13) + 67;
val += (vp56_rac_get_prob(c, 254) << 12);
val += (vp56_rac_get_prob(c, 254) << 11);
val += (vp56_rac_get_prob(c, 252) << 10);
val += (vp56_rac_get_prob(c, 249) << 9);
val += (vp56_rac_get_prob(c, 243) << 8);
val += (vp56_rac_get_prob(c, 230) << 7);
val += (vp56_rac_get_prob(c, 196) << 6);
val += (vp56_rac_get_prob(c, 177) << 5);
val += (vp56_rac_get_prob(c, 153) << 4);
val += (vp56_rac_get_prob(c, 140) << 3);
val += (vp56_rac_get_prob(c, 133) << 2);
val += (vp56_rac_get_prob(c, 130) << 1);
val += vp56_rac_get_prob(c, 129);
}
}
}
if (!--band_left)
band_left = band_counts[++band];
if (tx == TX_32X32) // FIXME slow
coef[rc] = ((vp8_rac_get(c) ? -val : val) * qmul[!!i]) / 2;
else
coef[rc] = (vp8_rac_get(c) ? -val : val) * 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(AVCodecContext *avctx)
{
VP9Context *s = avctx->priv_data;
VP9Block *const b = &s->b;
int row = b->row, col = b->col;
uint8_t (*p)[6][11] = s->prob.coef[b->tx][0 /* y */][!b->intra];
unsigned (*c)[6][3] = s->counts.coef[b->tx][0 /* y */][!b->intra];
unsigned (*e)[6][2] = s->counts.eob[b->tx][0 /* y */][!b->intra];
int w4 = bwh_tab[1][b->bs][0] << 1, h4 = 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, step1d = 1 << b->tx, step = 1 << (b->tx * 2);
int uvstep1d = 1 << b->uvtx, uvstep = 1 << (b->uvtx * 2), ret;
int16_t (*qmul)[2] = s->segmentation.feat[b->seg_id].qmul;
int tx = 4 * s->lossless + b->tx;
const int16_t **yscans = ff_vp9_scans[tx];
const int16_t (**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 = &s->left_y_nnz_ctx[(row & 7) << 1];
static const int16_t band_counts[4][8] = {
{ 1, 2, 3, 4, 3, 16 - 13, 0 },
{ 1, 2, 3, 4, 11, 64 - 21, 0 },
{ 1, 2, 3, 4, 11, 256 - 21, 0 },
{ 1, 2, 3, 4, 11, 1024 - 21, 0 },
};
const int16_t *y_band_counts = band_counts[b->tx];
const int16_t *uv_band_counts = band_counts[b->uvtx];
/* y tokens */
if (b->tx > TX_4X4) { // FIXME slow
for (y = 0; y < end_y; y += step1d)
for (x = 1; x < step1d; x++)
l[y] |= l[y + x];
for (x = 0; x < end_x; x += step1d)
for (y = 1; y < step1d; y++)
a[x] |= a[x + y];
}
for (n = 0, y = 0; y < end_y; y += step1d) {
for (x = 0; x < end_x; x += step1d, n += step) {
enum TxfmType txtp = ff_vp9_intra_txfm_type[b->mode[b->tx == TX_4X4 &&
b->bs > BS_8x8 ?
n : 0]];
int nnz = a[x] + l[y];
if ((ret = decode_block_coeffs(&s->c, s->block + 16 * n, 16 * step,
b->tx, c, e, p, nnz, yscans[txtp],
ynbs[txtp], y_band_counts,
qmul[0])) < 0)
return ret;
a[x] = l[y] = !!ret;
if (b->tx > TX_8X8)
AV_WN16A(&s->eob[n], ret);
else
s->eob[n] = ret;
}
}
if (b->tx > TX_4X4) { // FIXME slow
for (y = 0; y < end_y; y += step1d)
memset(&l[y + 1], l[y], FFMIN(end_y - y - 1, step1d - 1));
for (x = 0; x < end_x; x += step1d)
memset(&a[x + 1], a[x], FFMIN(end_x - x - 1, step1d - 1));
}
p = s->prob.coef[b->uvtx][1 /* uv */][!b->intra];
c = s->counts.coef[b->uvtx][1 /* uv */][!b->intra];
e = s->counts.eob[b->uvtx][1 /* uv */][!b->intra];
w4 >>= 1;
h4 >>= 1;
end_x >>= 1;
end_y >>= 1;
for (pl = 0; pl < 2; pl++) {
a = &s->above_uv_nnz_ctx[pl][col];
l = &s->left_uv_nnz_ctx[pl][row & 7];
if (b->uvtx > TX_4X4) { // FIXME slow
for (y = 0; y < end_y; y += uvstep1d)
for (x = 1; x < uvstep1d; x++)
l[y] |= l[y + x];
for (x = 0; x < end_x; x += uvstep1d)
for (y = 1; y < uvstep1d; y++)
a[x] |= a[x + y];
}
for (n = 0, y = 0; y < end_y; y += uvstep1d) {
for (x = 0; x < end_x; x += uvstep1d, n += uvstep) {
int nnz = a[x] + l[y];
if ((ret = decode_block_coeffs(&s->c, s->uvblock[pl] + 16 * n,
16 * uvstep, b->uvtx, c, e, p,
nnz, uvscan, uvnb,
uv_band_counts, qmul[1])) < 0)
return ret;
a[x] = l[y] = !!ret;
if (b->uvtx > TX_8X8)
AV_WN16A(&s->uveob[pl][n], ret);
else
s->uveob[pl][n] = ret;
}
}
if (b->uvtx > TX_4X4) { // FIXME slow
for (y = 0; y < end_y; y += uvstep1d)
memset(&l[y + 1], l[y], FFMIN(end_y - y - 1, uvstep1d - 1));
for (x = 0; x < end_x; x += uvstep1d)
memset(&a[x + 1], a[x], FFMIN(end_x - x - 1, uvstep1d - 1));
}
}
return 0;
}
static av_always_inline int check_intra_mode(VP9Context *s, int mode,
uint8_t **a,
uint8_t *dst_edge,
ptrdiff_t stride_edge,
uint8_t *dst_inner,
ptrdiff_t stride_inner,
uint8_t *l, int col, int x, int w,
int row, int y, enum TxfmMode tx,
int p)
{
int have_top = row > 0 || y > 0;
int have_left = col > s->tiling.tile_col_start || x > 0;
int have_right = x < w - 1;
static const uint8_t mode_conv[10][2 /* have_left */][2 /* have_top */] = {
[VERT_PRED] = { { DC_127_PRED, VERT_PRED },
{ DC_127_PRED, VERT_PRED } },
[HOR_PRED] = { { DC_129_PRED, DC_129_PRED },
{ HOR_PRED, HOR_PRED } },
[DC_PRED] = { { DC_128_PRED, TOP_DC_PRED },
{ LEFT_DC_PRED, DC_PRED } },
[DIAG_DOWN_LEFT_PRED] = { { DC_127_PRED, DIAG_DOWN_LEFT_PRED },
{ DC_127_PRED, DIAG_DOWN_LEFT_PRED } },
[DIAG_DOWN_RIGHT_PRED] = { { DIAG_DOWN_RIGHT_PRED, DIAG_DOWN_RIGHT_PRED },
{ DIAG_DOWN_RIGHT_PRED, DIAG_DOWN_RIGHT_PRED } },
[VERT_RIGHT_PRED] = { { VERT_RIGHT_PRED, VERT_RIGHT_PRED },
{ VERT_RIGHT_PRED, VERT_RIGHT_PRED } },
[HOR_DOWN_PRED] = { { HOR_DOWN_PRED, HOR_DOWN_PRED },
{ HOR_DOWN_PRED, HOR_DOWN_PRED } },
[VERT_LEFT_PRED] = { { DC_127_PRED, VERT_LEFT_PRED },
{ DC_127_PRED, VERT_LEFT_PRED } },
[HOR_UP_PRED] = { { DC_129_PRED, DC_129_PRED },
{ HOR_UP_PRED, HOR_UP_PRED } },
[TM_VP8_PRED] = { { DC_129_PRED, VERT_PRED },
{ HOR_PRED, TM_VP8_PRED } },
};
static const struct {
uint8_t needs_left:1;
uint8_t needs_top:1;
uint8_t needs_topleft:1;
uint8_t needs_topright:1;
} edges[N_INTRA_PRED_MODES] = {
[VERT_PRED] = { .needs_top = 1 },
[HOR_PRED] = { .needs_left = 1 },
[DC_PRED] = { .needs_top = 1, .needs_left = 1 },
[DIAG_DOWN_LEFT_PRED] = { .needs_top = 1, .needs_topright = 1 },
[DIAG_DOWN_RIGHT_PRED] = { .needs_left = 1, .needs_top = 1,
.needs_topleft = 1 },
[VERT_RIGHT_PRED] = { .needs_left = 1, .needs_top = 1,
.needs_topleft = 1 },
[HOR_DOWN_PRED] = { .needs_left = 1, .needs_top = 1,
.needs_topleft = 1 },
[VERT_LEFT_PRED] = { .needs_top = 1, .needs_topright = 1 },
[HOR_UP_PRED] = { .needs_left = 1 },
[TM_VP8_PRED] = { .needs_left = 1, .needs_top = 1,
.needs_topleft = 1 },
[LEFT_DC_PRED] = { .needs_left = 1 },
[TOP_DC_PRED] = { .needs_top = 1 },
[DC_128_PRED] = { 0 },
[DC_127_PRED] = { 0 },
[DC_129_PRED] = { 0 }
};
av_assert2(mode >= 0 && mode < 10);
mode = mode_conv[mode][have_left][have_top];
if (edges[mode].needs_top) {
uint8_t *top = NULL, *topleft = NULL;
int n_px_need = 4 << tx, n_px_have = (((s->cols - col) << !p) - x) * 4;
int n_px_need_tr = 0;
if (tx == TX_4X4 && edges[mode].needs_topright && have_right)
n_px_need_tr = 4;
// if top of sb64-row, use s->intra_pred_data[] instead of
// dst[-stride] for intra prediction (it contains pre- instead of
// post-loopfilter data)
if (have_top) {
top = !(row & 7) && !y ?
s->intra_pred_data[p] + col * (8 >> !!p) + x * 4 :
y == 0 ? &dst_edge[-stride_edge] : &dst_inner[-stride_inner];
if (have_left)
topleft = !(row & 7) && !y ?
s->intra_pred_data[p] + col * (8 >> !!p) + x * 4 :
y == 0 || x == 0 ? &dst_edge[-stride_edge] :
&dst_inner[-stride_inner];
}
if (have_top &&
(!edges[mode].needs_topleft || (have_left && top == topleft)) &&
(tx != TX_4X4 || !edges[mode].needs_topright || have_right) &&
n_px_need + n_px_need_tr <= n_px_have) {
*a = top;
} else {
if (have_top) {
if (n_px_need <= n_px_have) {
memcpy(*a, top, n_px_need);
} else {
memcpy(*a, top, n_px_have);
memset(&(*a)[n_px_have], (*a)[n_px_have - 1],
n_px_need - n_px_have);
}
} else {
memset(*a, 127, n_px_need);
}
if (edges[mode].needs_topleft) {
if (have_left && have_top)
(*a)[-1] = topleft[-1];
else
(*a)[-1] = have_top ? 129 : 127;
}
if (tx == TX_4X4 && edges[mode].needs_topright) {
if (have_top && have_right &&
n_px_need + n_px_need_tr <= n_px_have) {
memcpy(&(*a)[4], &top[4], 4);
} else {
memset(&(*a)[4], (*a)[3], 4);
}
}
}
}
if (edges[mode].needs_left) {
if (have_left) {
int i;
int n_px_need = 4 << tx;
int n_px_have = (((s->rows - row) << !p) - y) * 4;
uint8_t *dst = x == 0 ? dst_edge : dst_inner;
ptrdiff_t stride = x == 0 ? stride_edge : stride_inner;
if (n_px_need <= n_px_have) {
for (i = 0; i < n_px_need; i++)
l[i] = dst[i * stride - 1];
} else {
for (i = 0; i < n_px_have; i++)
l[i] = dst[i * stride - 1];
memset(&l[i], l[i - 1], n_px_need - n_px_have);
}
} else {
memset(l, 129, 4 << tx);
}
}
return mode;
}
static void intra_recon(AVCodecContext *avctx, ptrdiff_t y_off, ptrdiff_t uv_off)
{
VP9Context *s = avctx->priv_data;
VP9Block *const b = &s->b;
int row = b->row, col = b->col;
int w4 = bwh_tab[1][b->bs][0] << 1, step1d = 1 << b->tx, n;
int h4 = bwh_tab[1][b->bs][1] << 1, x, y, step = 1 << (b->tx * 2);
int end_x = FFMIN(2 * (s->cols - col), w4);
int end_y = FFMIN(2 * (s->rows - row), h4);
int tx = 4 * s->lossless + b->tx, uvtx = b->uvtx + 4 * s->lossless;
int uvstep1d = 1 << b->uvtx, p;
uint8_t *dst = b->dst[0], *dst_r = s->cur_frame->data[0] + y_off;
for (n = 0, y = 0; y < end_y; y += step1d) {
uint8_t *ptr = dst, *ptr_r = dst_r;
for (x = 0; x < end_x;
x += step1d, ptr += 4 * step1d, ptr_r += 4 * step1d, n += step) {
int mode = b->mode[b->bs > BS_8x8 && b->tx == TX_4X4 ?
y * 2 + x : 0];
LOCAL_ALIGNED_16(uint8_t, a_buf, [48]);
uint8_t *a = &a_buf[16], l[32];
enum TxfmType txtp = ff_vp9_intra_txfm_type[mode];
int eob = b->tx > TX_8X8 ? AV_RN16A(&s->eob[n]) : s->eob[n];
mode = check_intra_mode(s, mode, &a, ptr_r,
s->cur_frame->linesize[0],
ptr, b->y_stride, l,
col, x, w4, row, y, b->tx, 0);
s->dsp.intra_pred[b->tx][mode](ptr, b->y_stride, l, a);
if (eob)
s->dsp.itxfm_add[tx][txtp](ptr, b->y_stride,
s->block + 16 * n, eob);
}
dst_r += 4 * s->cur_frame->linesize[0] * step1d;
dst += 4 * b->y_stride * step1d;
}
// U/V
h4 >>= 1;
w4 >>= 1;
end_x >>= 1;
end_y >>= 1;
step = 1 << (b->uvtx * 2);
for (p = 0; p < 2; p++) {
dst = b->dst[1 + p];
dst_r = s->cur_frame->data[1 + p] + uv_off;
for (n = 0, y = 0; y < end_y; y += uvstep1d) {
uint8_t *ptr = dst, *ptr_r = dst_r;
for (x = 0; x < end_x;
x += uvstep1d, ptr += 4 * uvstep1d,
ptr_r += 4 * uvstep1d, n += step) {
int mode = b->uvmode;
LOCAL_ALIGNED_16(uint8_t, a_buf, [48]);
uint8_t *a = &a_buf[16], l[32];
int eob = b->uvtx > TX_8X8 ? AV_RN16A(&s->uveob[p][n])
: s->uveob[p][n];
mode = check_intra_mode(s, mode, &a, ptr_r,
s->cur_frame->linesize[1],
ptr, b->uv_stride, l,
col, x, w4, row, y, b->uvtx, p + 1);
s->dsp.intra_pred[b->uvtx][mode](ptr, b->uv_stride, l, a);
if (eob)
s->dsp.itxfm_add[uvtx][DCT_DCT](ptr, b->uv_stride,
s->uvblock[p] + 16 * n,
eob);
}
dst_r += 4 * uvstep1d * s->cur_frame->linesize[1];
dst += 4 * uvstep1d * b->uv_stride;
}
}
}
static av_always_inline void mc_luma_dir(VP9Context *s, vp9_mc_func(*mc)[2],
uint8_t *dst, ptrdiff_t dst_stride,
const uint8_t *ref,
ptrdiff_t ref_stride,
ptrdiff_t y, ptrdiff_t x,
const VP56mv *mv,
int bw, int bh, int w, int h)
{
int mx = mv->x, my = mv->y;
y += my >> 3;
x += mx >> 3;
ref += y * ref_stride + x;
mx &= 7;
my &= 7;
// FIXME bilinear filter only needs 0/1 pixels, not 3/4
if (x < !!mx * 3 || y < !!my * 3 ||
x + !!mx * 4 > w - bw || y + !!my * 4 > h - bh) {
s->vdsp.emulated_edge_mc(s->edge_emu_buffer,
ref - !!my * 3 * ref_stride - !!mx * 3,
80,
ref_stride,
bw + !!mx * 7, bh + !!my * 7,
x - !!mx * 3, y - !!my * 3, w, h);
ref = s->edge_emu_buffer + !!my * 3 * 80 + !!mx * 3;
ref_stride = 80;
}
mc[!!mx][!!my](dst, ref, dst_stride, ref_stride, bh, mx << 1, my << 1);
}
static av_always_inline void mc_chroma_dir(VP9Context *s, vp9_mc_func(*mc)[2],
uint8_t *dst_u, uint8_t *dst_v,
ptrdiff_t dst_stride,
const uint8_t *ref_u,
ptrdiff_t src_stride_u,
const uint8_t *ref_v,
ptrdiff_t src_stride_v,
ptrdiff_t y, ptrdiff_t x,
const VP56mv *mv,
int bw, int bh, int w, int h)
{
int mx = mv->x, my = mv->y;
y += my >> 4;
x += mx >> 4;
ref_u += y * src_stride_u + x;
ref_v += y * src_stride_v + x;
mx &= 15;
my &= 15;
// FIXME bilinear filter only needs 0/1 pixels, not 3/4
if (x < !!mx * 3 || y < !!my * 3 ||
x + !!mx * 4 > w - bw || y + !!my * 4 > h - bh) {
s->vdsp.emulated_edge_mc(s->edge_emu_buffer,
ref_u - !!my * 3 * src_stride_u - !!mx * 3,
80,
src_stride_u,
bw + !!mx * 7, bh + !!my * 7,
x - !!mx * 3, y - !!my * 3, w, h);
ref_u = s->edge_emu_buffer + !!my * 3 * 80 + !!mx * 3;
mc[!!mx][!!my](dst_u, ref_u, dst_stride, 80, bh, mx, my);
s->vdsp.emulated_edge_mc(s->edge_emu_buffer,
ref_v - !!my * 3 * src_stride_v - !!mx * 3,
80,
src_stride_v,
bw + !!mx * 7, bh + !!my * 7,
x - !!mx * 3, y - !!my * 3, w, h);
ref_v = s->edge_emu_buffer + !!my * 3 * 80 + !!mx * 3;
mc[!!mx][!!my](dst_v, ref_v, dst_stride, 80, bh, mx, my);
} else {
mc[!!mx][!!my](dst_u, ref_u, dst_stride, src_stride_u, bh, mx, my);
mc[!!mx][!!my](dst_v, ref_v, dst_stride, src_stride_v, bh, mx, my);
}
}
static int inter_recon(AVCodecContext *avctx)
{
static const uint8_t bwlog_tab[2][N_BS_SIZES] = {
{ 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4 },
{ 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4, 4 },
};
VP9Context *s = avctx->priv_data;
VP9Block *const b = &s->b;
int row = b->row, col = b->col;
AVFrame *ref1 = s->refs[s->refidx[b->ref[0]]];
AVFrame *ref2 = b->comp ? s->refs[s->refidx[b->ref[1]]] : NULL;
int w = avctx->width, h = avctx->height;
ptrdiff_t ls_y = b->y_stride, ls_uv = b->uv_stride;
if (!ref1->data[0] || (b->comp && !ref2->data[0]))
return AVERROR_INVALIDDATA;
// y inter pred
if (b->bs > BS_8x8) {
if (b->bs == BS_8x4) {
mc_luma_dir(s, s->dsp.mc[3][b->filter][0], b->dst[0], ls_y,
ref1->data[0], ref1->linesize[0],
row << 3, col << 3, &b->mv[0][0], 8, 4, w, h);
mc_luma_dir(s, s->dsp.mc[3][b->filter][0],
b->dst[0] + 4 * ls_y, ls_y,
ref1->data[0], ref1->linesize[0],
(row << 3) + 4, col << 3, &b->mv[2][0], 8, 4, w, h);
if (b->comp) {
mc_luma_dir(s, s->dsp.mc[3][b->filter][1], b->dst[0], ls_y,
ref2->data[0], ref2->linesize[0],
row << 3, col << 3, &b->mv[0][1], 8, 4, w, h);
mc_luma_dir(s, s->dsp.mc[3][b->filter][1],
b->dst[0] + 4 * ls_y, ls_y,
ref2->data[0], ref2->linesize[0],
(row << 3) + 4, col << 3, &b->mv[2][1], 8, 4, w, h);
}
} else if (b->bs == BS_4x8) {
mc_luma_dir(s, s->dsp.mc[4][b->filter][0], b->dst[0], ls_y,
ref1->data[0], ref1->linesize[0],
row << 3, col << 3, &b->mv[0][0], 4, 8, w, h);
mc_luma_dir(s, s->dsp.mc[4][b->filter][0], b->dst[0] + 4, ls_y,
ref1->data[0], ref1->linesize[0],
row << 3, (col << 3) + 4, &b->mv[1][0], 4, 8, w, h);
if (b->comp) {
mc_luma_dir(s, s->dsp.mc[4][b->filter][1], b->dst[0], ls_y,
ref2->data[0], ref2->linesize[0],
row << 3, col << 3, &b->mv[0][1], 4, 8, w, h);
mc_luma_dir(s, s->dsp.mc[4][b->filter][1], b->dst[0] + 4, ls_y,
ref2->data[0], ref2->linesize[0],
row << 3, (col << 3) + 4, &b->mv[1][1], 4, 8, w, h);
}
} else {
av_assert2(b->bs == BS_4x4);
// FIXME if two horizontally adjacent blocks have the same MV,
// do a w8 instead of a w4 call
mc_luma_dir(s, s->dsp.mc[4][b->filter][0], b->dst[0], ls_y,
ref1->data[0], ref1->linesize[0],
row << 3, col << 3, &b->mv[0][0], 4, 4, w, h);
mc_luma_dir(s, s->dsp.mc[4][b->filter][0], b->dst[0] + 4, ls_y,
ref1->data[0], ref1->linesize[0],
row << 3, (col << 3) + 4, &b->mv[1][0], 4, 4, w, h);
mc_luma_dir(s, s->dsp.mc[4][b->filter][0],
b->dst[0] + 4 * ls_y, ls_y,
ref1->data[0], ref1->linesize[0],
(row << 3) + 4, col << 3, &b->mv[2][0], 4, 4, w, h);
mc_luma_dir(s, s->dsp.mc[4][b->filter][0],
b->dst[0] + 4 * ls_y + 4, ls_y,
ref1->data[0], ref1->linesize[0],
(row << 3) + 4, (col << 3) + 4, &b->mv[3][0], 4, 4, w, h);
if (b->comp) {
mc_luma_dir(s, s->dsp.mc[4][b->filter][1], b->dst[0], ls_y,
ref2->data[0], ref2->linesize[0],
row << 3, col << 3, &b->mv[0][1], 4, 4, w, h);
mc_luma_dir(s, s->dsp.mc[4][b->filter][1], b->dst[0] + 4, ls_y,
ref2->data[0], ref2->linesize[0],
row << 3, (col << 3) + 4, &b->mv[1][1], 4, 4, w, h);
mc_luma_dir(s, s->dsp.mc[4][b->filter][1],
b->dst[0] + 4 * ls_y, ls_y,
ref2->data[0], ref2->linesize[0],
(row << 3) + 4, col << 3, &b->mv[2][1], 4, 4, w, h);
mc_luma_dir(s, s->dsp.mc[4][b->filter][1],
b->dst[0] + 4 * ls_y + 4, ls_y,
ref2->data[0], ref2->linesize[0],
(row << 3) + 4, (col << 3) + 4, &b->mv[3][1], 4, 4, w, h);
}
}
} else {
int bwl = bwlog_tab[0][b->bs];
int bw = bwh_tab[0][b->bs][0] * 4;
int bh = bwh_tab[0][b->bs][1] * 4;
mc_luma_dir(s, s->dsp.mc[bwl][b->filter][0], b->dst[0], ls_y,
ref1->data[0], ref1->linesize[0],
row << 3, col << 3, &b->mv[0][0], bw, bh, w, h);
if (b->comp)
mc_luma_dir(s, s->dsp.mc[bwl][b->filter][1], b->dst[0], ls_y,
ref2->data[0], ref2->linesize[0],
row << 3, col << 3, &b->mv[0][1], bw, bh, w, h);
}
// uv inter pred
{
int bwl = bwlog_tab[1][b->bs];
int bw = bwh_tab[1][b->bs][0] * 4, bh = bwh_tab[1][b->bs][1] * 4;
VP56mv mvuv;
w = (w + 1) >> 1;
h = (h + 1) >> 1;
if (b->bs > BS_8x8) {
mvuv.x = ROUNDED_DIV(b->mv[0][0].x + b->mv[1][0].x +
b->mv[2][0].x + b->mv[3][0].x, 4);
mvuv.y = ROUNDED_DIV(b->mv[0][0].y + b->mv[1][0].y +
b->mv[2][0].y + b->mv[3][0].y, 4);
} else {
mvuv = b->mv[0][0];
}
mc_chroma_dir(s, s->dsp.mc[bwl][b->filter][0],
b->dst[1], b->dst[2], ls_uv,
ref1->data[1], ref1->linesize[1],
ref1->data[2], ref1->linesize[2],
row << 2, col << 2, &mvuv, bw, bh, w, h);
if (b->comp) {
if (b->bs > BS_8x8) {
mvuv.x = ROUNDED_DIV(b->mv[0][1].x + b->mv[1][1].x +
b->mv[2][1].x + b->mv[3][1].x, 4);
mvuv.y = ROUNDED_DIV(b->mv[0][1].y + b->mv[1][1].y +
b->mv[2][1].y + b->mv[3][1].y, 4);
} else {
mvuv = b->mv[0][1];
}
mc_chroma_dir(s, s->dsp.mc[bwl][b->filter][1],
b->dst[1], b->dst[2], ls_uv,
ref2->data[1], ref2->linesize[1],
ref2->data[2], ref2->linesize[2],
row << 2, col << 2, &mvuv, bw, bh, w, h);
}
}
if (!b->skip) {
/* mostly copied intra_reconn() */
int w4 = bwh_tab[1][b->bs][0] << 1, step1d = 1 << b->tx, n;
int h4 = bwh_tab[1][b->bs][1] << 1, x, y, step = 1 << (b->tx * 2);
int end_x = FFMIN(2 * (s->cols - col), w4);
int end_y = FFMIN(2 * (s->rows - row), h4);
int tx = 4 * s->lossless + b->tx, uvtx = b->uvtx + 4 * s->lossless;
int uvstep1d = 1 << b->uvtx, p;
uint8_t *dst = b->dst[0];
// y itxfm add
for (n = 0, y = 0; y < end_y; y += step1d) {
uint8_t *ptr = dst;
for (x = 0; x < end_x; x += step1d, ptr += 4 * step1d, n += step) {
int eob = b->tx > TX_8X8 ? AV_RN16A(&s->eob[n]) : s->eob[n];
if (eob)
s->dsp.itxfm_add[tx][DCT_DCT](ptr, b->y_stride,
s->block + 16 * n, eob);
}
dst += 4 * b->y_stride * step1d;
}
// uv itxfm add
h4 >>= 1;
w4 >>= 1;
end_x >>= 1;
end_y >>= 1;
step = 1 << (b->uvtx * 2);
for (p = 0; p < 2; p++) {
dst = b->dst[p + 1];
for (n = 0, y = 0; y < end_y; y += uvstep1d) {
uint8_t *ptr = dst;
for (x = 0; x < end_x; x += uvstep1d, ptr += 4 * uvstep1d, n += step) {
int eob = b->uvtx > TX_8X8 ? AV_RN16A(&s->uveob[p][n])
: s->uveob[p][n];
if (eob)
s->dsp.itxfm_add[uvtx][DCT_DCT](ptr, b->uv_stride,
s->uvblock[p] + 16 * n, eob);
}
dst += 4 * uvstep1d * b->uv_stride;
}
}
}
return 0;
}
static av_always_inline void mask_edges(VP9Filter *lflvl, int is_uv,
int row_and_7, int col_and_7,
int w, int h, int col_end, int row_end,
enum TxfmMode tx, int skip_inter)
{
// 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 && is_uv) {
if (h == 1) {
if (row_and_7 & 1)
return;
if (!row_end)
h += 1;
}
if (w == 1) {
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;
int m_col_odd = (t << (w - 1)) - t;
// on 32-px edges, use the 8-px wide loopfilter; else, use 4-px wide
if (is_uv) {
int m_row_8 = m_col & 0x01, 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 & 7);
lflvl->mask[is_uv][0][y][1] |= m_row_8;
lflvl->mask[is_uv][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 ((col_end & 1) && (y & 1)) {
lflvl->mask[is_uv][1][y][col_mask_id] |= m_col_odd;
} else {
lflvl->mask[is_uv][1][y][col_mask_id] |= m_col;
}
}
} else {
int m_row_8 = m_col & 0x11, 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 & 3);
lflvl->mask[is_uv][0][y][1] |= m_row_8; // row edge
lflvl->mask[is_uv][0][y][2] |= m_row_4;
lflvl->mask[is_uv][1][y][col_mask_id] |= m_col; // col edge
lflvl->mask[is_uv][0][y][3] |= m_col;
lflvl->mask[is_uv][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 + is_uv - 1, step1d = 1 << l2;
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 (is_uv && 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++) {
lflvl->mask[is_uv][0][y][0] |= m_row_16;
lflvl->mask[is_uv][0][y][1] |= m_row_8;
}
} else {
for (y = row_and_7; y < h + row_and_7; y++)
lflvl->mask[is_uv][0][y][mask_id] |= m_row;
}
if (is_uv && tx > TX_8X8 && (h ^ (h - 1)) == 1) {
for (y = row_and_7; y < h + row_and_7 - 1; y += step1d)
lflvl->mask[is_uv][1][y][0] |= m_col;
if (y - row_and_7 == h - 1)
lflvl->mask[is_uv][1][y][1] |= m_col;
} else {
for (y = row_and_7; y < h + row_and_7; y += step1d)
lflvl->mask[is_uv][1][y][mask_id] |= m_col;
}
} else if (tx != TX_4X4) {
int mask_id;
mask_id = (tx == TX_8X8) || (is_uv && h == 1);
lflvl->mask[is_uv][1][row_and_7][mask_id] |= m_col;
mask_id = (tx == TX_8X8) || (is_uv && w == 1);
for (y = row_and_7; y < h + row_and_7; y++)
lflvl->mask[is_uv][0][y][mask_id] |= t;
} else if (is_uv) {
int t8 = t & 0x01, t4 = t - t8;
for (y = row_and_7; y < h + row_and_7; y++) {
lflvl->mask[is_uv][0][y][2] |= t4;
lflvl->mask[is_uv][0][y][1] |= t8;
}
lflvl->mask[is_uv][1][row_and_7][2 - !(row_and_7 & 7)] |= m_col;
} else {
int t8 = t & 0x11, t4 = t - t8;
for (y = row_and_7; y < h + row_and_7; y++) {
lflvl->mask[is_uv][0][y][2] |= t4;
lflvl->mask[is_uv][0][y][1] |= t8;
}
lflvl->mask[is_uv][1][row_and_7][2 - !(row_and_7 & 3)] |= m_col;
}
}
}
int ff_vp9_decode_block(AVCodecContext *avctx, int row, int col,
VP9Filter *lflvl, ptrdiff_t yoff, ptrdiff_t uvoff,
enum BlockLevel bl, enum BlockPartition bp)
{
VP9Context *s = avctx->priv_data;
VP9Block *const b = &s->b;
enum BlockSize bs = bl * 3 + bp;
int ret, y, w4 = bwh_tab[1][bs][0], h4 = bwh_tab[1][bs][1], lvl;
int emu[2];
b->row = row;
b->row7 = row & 7;
b->col = col;
b->col7 = col & 7;
s->min_mv.x = -(128 + col * 64);
s->min_mv.y = -(128 + row * 64);
s->max_mv.x = 128 + (s->cols - col - w4) * 64;
s->max_mv.y = 128 + (s->rows - row - h4) * 64;
b->bs = bs;
decode_mode(s, b);
b->uvtx = b->tx - (w4 * 2 == (1 << b->tx) || h4 * 2 == (1 << b->tx));
if (!b->skip) {
if ((ret = decode_coeffs(avctx)) < 0)
return ret;
} else {
int pl;
memset(&s->above_y_nnz_ctx[col * 2], 0, w4 * 2);
memset(&s->left_y_nnz_ctx[(row & 7) << 1], 0, h4 * 2);
for (pl = 0; pl < 2; pl++) {
memset(&s->above_uv_nnz_ctx[pl][col], 0, w4);
memset(&s->left_uv_nnz_ctx[pl][row & 7], 0, h4);
}
}
/* Emulated overhangs if the stride of the target buffer can't hold.
* This allows to support emu-edge and so on even if we have large
* block overhangs. */
emu[0] = (col + w4) * 8 > s->cur_frame->linesize[0] ||
(row + h4) > s->rows + 2 * !(avctx->flags & CODEC_FLAG_EMU_EDGE);
emu[1] = (col + w4) * 4 > s->cur_frame->linesize[1] ||
(row + h4) > s->rows + 2 * !(avctx->flags & CODEC_FLAG_EMU_EDGE);
if (emu[0]) {
b->dst[0] = s->tmp_y;
b->y_stride = 64;
} else {
b->dst[0] = s->cur_frame->data[0] + yoff;
b->y_stride = s->cur_frame->linesize[0];
}
if (emu[1]) {
b->dst[1] = s->tmp_uv[0];
b->dst[2] = s->tmp_uv[1];
b->uv_stride = 32;
} else {
b->dst[1] = s->cur_frame->data[1] + uvoff;
b->dst[2] = s->cur_frame->data[2] + uvoff;
b->uv_stride = s->cur_frame->linesize[1];
}
if (b->intra) {
intra_recon(avctx, yoff, uvoff);
} else {
if ((ret = inter_recon(avctx)) < 0)
return ret;
}
if (emu[0]) {
int w = FFMIN(s->cols - col, w4) * 8;
int h = FFMIN(s->rows - row, h4) * 8;
int 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](s->cur_frame->data[0] + yoff + o,
s->tmp_y + o,
s->cur_frame->linesize[0],
64, h, 0, 0);
o += bw;
}
}
}
if (emu[1]) {
int w = FFMIN(s->cols - col, w4) * 4;
int h = FFMIN(s->rows - row, h4) * 4;
int n, o = 0;
for (n = 1; o < w; n++) {
int bw = 64 >> n;
av_assert2(n <= 4);
if (w & bw) {
s->dsp.mc[n][0][0][0][0](s->cur_frame->data[1] + uvoff + o,
s->tmp_uv[0] + o,
s->cur_frame->linesize[1],
32, h, 0, 0);
s->dsp.mc[n][0][0][0][0](s->cur_frame->data[2] + uvoff + o,
s->tmp_uv[1] + o,
s->cur_frame->linesize[2],
32, h, 0, 0);
o += bw;
}
}
}
// pick filter level and find edges to apply filter to
if (s->filter.level &&
(lvl = s->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);
int y_end = FFMIN(s->rows - row, h4);
int skip_inter = !b->intra && b->skip;
for (y = 0; y < h4; y++)
memset(&lflvl->level[((row & 7) + y) * 8 + (col & 7)], lvl, w4);
mask_edges(lflvl, 0, row & 7, col & 7, x_end, y_end, 0, 0, b->tx, skip_inter);
mask_edges(lflvl, 1, row & 7, col & 7, 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->filter.lim_lut[lvl]) {
int sharp = s->filter.sharpness;
int limit = lvl;
if (sharp > 0) {
limit >>= (sharp + 3) >> 2;
limit = FFMIN(limit, 9 - sharp);
}
limit = FFMAX(limit, 1);
s->filter.lim_lut[lvl] = limit;
s->filter.mblim_lut[lvl] = 2 * (lvl + 2) + limit;
}
}
return 0;
}
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