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FFmpeg/libavcodec/vc1_loopfilter.c
Michael Niedermayer 51946d2de8 vc1: Use the correct shift amount 
`is_intra` is a 6bits bitfield.

CC: libav-stable@libav.org
Bug-Id: CID 1194380 / CID 1194381

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
2014-11-25 02:00:06 +00:00

354 lines
15 KiB
C
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/*
* VC-1 and WMV3 decoder
* Copyright (c) 2011 Mashiat Sarker Shakkhar
* Copyright (c) 2006-2007 Konstantin Shishkov
* Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
*
* 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
*/
/**
* @file
* VC-1 and WMV3 loopfilter
*/
#include "avcodec.h"
#include "mpegvideo.h"
#include "vc1.h"
#include "vc1dsp.h"
void ff_vc1_loop_filter_iblk(VC1Context *v, int pq)
{
MpegEncContext *s = &v->s;
int j;
if (!s->first_slice_line) {
v->vc1dsp.vc1_v_loop_filter16(s->dest[0], s->linesize, pq);
if (s->mb_x)
v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize, s->linesize, pq);
v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize + 8, s->linesize, pq);
for (j = 0; j < 2; j++) {
v->vc1dsp.vc1_v_loop_filter8(s->dest[j + 1], s->uvlinesize, pq);
if (s->mb_x)
v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize, s->uvlinesize, pq);
}
}
v->vc1dsp.vc1_v_loop_filter16(s->dest[0] + 8 * s->linesize, s->linesize, pq);
if (s->mb_y == s->end_mb_y - 1) {
if (s->mb_x) {
v->vc1dsp.vc1_h_loop_filter16(s->dest[0], s->linesize, pq);
v->vc1dsp.vc1_h_loop_filter8(s->dest[1], s->uvlinesize, pq);
v->vc1dsp.vc1_h_loop_filter8(s->dest[2], s->uvlinesize, pq);
}
v->vc1dsp.vc1_h_loop_filter16(s->dest[0] + 8, s->linesize, pq);
}
}
void ff_vc1_loop_filter_iblk_delayed(VC1Context *v, int pq)
{
MpegEncContext *s = &v->s;
int j;
/* The loopfilter runs 1 row and 1 column behind the overlap filter, which
* means it runs two rows/cols behind the decoding loop. */
if (!s->first_slice_line) {
if (s->mb_x) {
if (s->mb_y >= s->start_mb_y + 2) {
v->vc1dsp.vc1_v_loop_filter16(s->dest[0] - 16 * s->linesize - 16, s->linesize, pq);
if (s->mb_x >= 2)
v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 32 * s->linesize - 16, s->linesize, pq);
v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 32 * s->linesize - 8, s->linesize, pq);
for (j = 0; j < 2; j++) {
v->vc1dsp.vc1_v_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize - 8, s->uvlinesize, pq);
if (s->mb_x >= 2) {
v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 16 * s->uvlinesize - 8, s->uvlinesize, pq);
}
}
}
v->vc1dsp.vc1_v_loop_filter16(s->dest[0] - 8 * s->linesize - 16, s->linesize, pq);
}
if (s->mb_x == s->mb_width - 1) {
if (s->mb_y >= s->start_mb_y + 2) {
v->vc1dsp.vc1_v_loop_filter16(s->dest[0] - 16 * s->linesize, s->linesize, pq);
if (s->mb_x)
v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 32 * s->linesize, s->linesize, pq);
v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 32 * s->linesize + 8, s->linesize, pq);
for (j = 0; j < 2; j++) {
v->vc1dsp.vc1_v_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize, s->uvlinesize, pq);
if (s->mb_x >= 2) {
v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 16 * s->uvlinesize, s->uvlinesize, pq);
}
}
}
v->vc1dsp.vc1_v_loop_filter16(s->dest[0] - 8 * s->linesize, s->linesize, pq);
}
if (s->mb_y == s->end_mb_y) {
if (s->mb_x) {
if (s->mb_x >= 2)
v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize - 16, s->linesize, pq);
v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize - 8, s->linesize, pq);
if (s->mb_x >= 2) {
for (j = 0; j < 2; j++) {
v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize - 8, s->uvlinesize, pq);
}
}
}
if (s->mb_x == s->mb_width - 1) {
if (s->mb_x)
v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize, s->linesize, pq);
v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize + 8, s->linesize, pq);
if (s->mb_x) {
for (j = 0; j < 2; j++) {
v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize, s->uvlinesize, pq);
}
}
}
}
}
}
void ff_vc1_smooth_overlap_filter_iblk(VC1Context *v)
{
MpegEncContext *s = &v->s;
int mb_pos;
if (v->condover == CONDOVER_NONE)
return;
mb_pos = s->mb_x + s->mb_y * s->mb_stride;
/* Within a MB, the horizontal overlap always runs before the vertical.
* To accomplish that, we run the H on left and internal borders of the
* currently decoded MB. Then, we wait for the next overlap iteration
* to do H overlap on the right edge of this MB, before moving over and
* running the V overlap. Therefore, the V overlap makes us trail by one
* MB col and the H overlap filter makes us trail by one MB row. This
* is reflected in the time at which we run the put_pixels loop. */
if (v->condover == CONDOVER_ALL || v->pq >= 9 || v->over_flags_plane[mb_pos]) {
if (s->mb_x && (v->condover == CONDOVER_ALL || v->pq >= 9 ||
v->over_flags_plane[mb_pos - 1])) {
v->vc1dsp.vc1_h_s_overlap(v->block[v->left_blk_idx][1],
v->block[v->cur_blk_idx][0]);
v->vc1dsp.vc1_h_s_overlap(v->block[v->left_blk_idx][3],
v->block[v->cur_blk_idx][2]);
if (!(s->flags & CODEC_FLAG_GRAY)) {
v->vc1dsp.vc1_h_s_overlap(v->block[v->left_blk_idx][4],
v->block[v->cur_blk_idx][4]);
v->vc1dsp.vc1_h_s_overlap(v->block[v->left_blk_idx][5],
v->block[v->cur_blk_idx][5]);
}
}
v->vc1dsp.vc1_h_s_overlap(v->block[v->cur_blk_idx][0],
v->block[v->cur_blk_idx][1]);
v->vc1dsp.vc1_h_s_overlap(v->block[v->cur_blk_idx][2],
v->block[v->cur_blk_idx][3]);
if (s->mb_x == s->mb_width - 1) {
if (!s->first_slice_line && (v->condover == CONDOVER_ALL || v->pq >= 9 ||
v->over_flags_plane[mb_pos - s->mb_stride])) {
v->vc1dsp.vc1_v_s_overlap(v->block[v->top_blk_idx][2],
v->block[v->cur_blk_idx][0]);
v->vc1dsp.vc1_v_s_overlap(v->block[v->top_blk_idx][3],
v->block[v->cur_blk_idx][1]);
if (!(s->flags & CODEC_FLAG_GRAY)) {
v->vc1dsp.vc1_v_s_overlap(v->block[v->top_blk_idx][4],
v->block[v->cur_blk_idx][4]);
v->vc1dsp.vc1_v_s_overlap(v->block[v->top_blk_idx][5],
v->block[v->cur_blk_idx][5]);
}
}
v->vc1dsp.vc1_v_s_overlap(v->block[v->cur_blk_idx][0],
v->block[v->cur_blk_idx][2]);
v->vc1dsp.vc1_v_s_overlap(v->block[v->cur_blk_idx][1],
v->block[v->cur_blk_idx][3]);
}
}
if (s->mb_x && (v->condover == CONDOVER_ALL || v->over_flags_plane[mb_pos - 1])) {
if (!s->first_slice_line && (v->condover == CONDOVER_ALL || v->pq >= 9 ||
v->over_flags_plane[mb_pos - s->mb_stride - 1])) {
v->vc1dsp.vc1_v_s_overlap(v->block[v->topleft_blk_idx][2],
v->block[v->left_blk_idx][0]);
v->vc1dsp.vc1_v_s_overlap(v->block[v->topleft_blk_idx][3],
v->block[v->left_blk_idx][1]);
if (!(s->flags & CODEC_FLAG_GRAY)) {
v->vc1dsp.vc1_v_s_overlap(v->block[v->topleft_blk_idx][4],
v->block[v->left_blk_idx][4]);
v->vc1dsp.vc1_v_s_overlap(v->block[v->topleft_blk_idx][5],
v->block[v->left_blk_idx][5]);
}
}
v->vc1dsp.vc1_v_s_overlap(v->block[v->left_blk_idx][0],
v->block[v->left_blk_idx][2]);
v->vc1dsp.vc1_v_s_overlap(v->block[v->left_blk_idx][1],
v->block[v->left_blk_idx][3]);
}
}
static av_always_inline void vc1_apply_p_v_loop_filter(VC1Context *v, int block_num)
{
MpegEncContext *s = &v->s;
int mb_cbp = v->cbp[s->mb_x - s->mb_stride],
block_cbp = mb_cbp >> (block_num * 4), bottom_cbp,
mb_is_intra = v->is_intra[s->mb_x - s->mb_stride],
block_is_intra = mb_is_intra >> (block_num * 4), bottom_is_intra;
int idx, linesize = block_num > 3 ? s->uvlinesize : s->linesize, ttblk;
uint8_t *dst;
if (block_num > 3) {
dst = s->dest[block_num - 3];
} else {
dst = s->dest[0] + (block_num & 1) * 8 + ((block_num & 2) * 4 - 8) * linesize;
}
if (s->mb_y != s->end_mb_y || block_num < 2) {
int16_t (*mv)[2];
int mv_stride;
if (block_num > 3) {
bottom_cbp = v->cbp[s->mb_x] >> (block_num * 4);
bottom_is_intra = v->is_intra[s->mb_x] >> block_num;
mv = &v->luma_mv[s->mb_x - s->mb_stride];
mv_stride = s->mb_stride;
} else {
bottom_cbp = (block_num < 2) ? (mb_cbp >> ((block_num + 2) * 4))
: (v->cbp[s->mb_x] >> ((block_num - 2) * 4));
bottom_is_intra = (block_num < 2) ? (mb_is_intra >> (block_num + 2))
: (v->is_intra[s->mb_x] >> (block_num - 2));
mv_stride = s->b8_stride;
mv = &s->current_picture.motion_val[0][s->block_index[block_num] - 2 * mv_stride];
}
if (bottom_is_intra & 1 || block_is_intra & 1 ||
mv[0][0] != mv[mv_stride][0] || mv[0][1] != mv[mv_stride][1]) {
v->vc1dsp.vc1_v_loop_filter8(dst, linesize, v->pq);
} else {
idx = ((bottom_cbp >> 2) | block_cbp) & 3;
if (idx == 3) {
v->vc1dsp.vc1_v_loop_filter8(dst, linesize, v->pq);
} else if (idx) {
if (idx == 1)
v->vc1dsp.vc1_v_loop_filter4(dst + 4, linesize, v->pq);
else
v->vc1dsp.vc1_v_loop_filter4(dst, linesize, v->pq);
}
}
}
dst -= 4 * linesize;
ttblk = (v->ttblk[s->mb_x - s->mb_stride] >> (block_num * 4)) & 0xF;
if (ttblk == TT_4X4 || ttblk == TT_8X4) {
idx = (block_cbp | (block_cbp >> 2)) & 3;
if (idx == 3) {
v->vc1dsp.vc1_v_loop_filter8(dst, linesize, v->pq);
} else if (idx) {
if (idx == 1)
v->vc1dsp.vc1_v_loop_filter4(dst + 4, linesize, v->pq);
else
v->vc1dsp.vc1_v_loop_filter4(dst, linesize, v->pq);
}
}
}
static av_always_inline void vc1_apply_p_h_loop_filter(VC1Context *v, int block_num)
{
MpegEncContext *s = &v->s;
int mb_cbp = v->cbp[s->mb_x - 1 - s->mb_stride],
block_cbp = mb_cbp >> (block_num * 4), right_cbp,
mb_is_intra = v->is_intra[s->mb_x - 1 - s->mb_stride],
block_is_intra = mb_is_intra >> block_num, right_is_intra;
int idx, linesize = block_num > 3 ? s->uvlinesize : s->linesize, ttblk;
uint8_t *dst;
if (block_num > 3) {
dst = s->dest[block_num - 3] - 8 * linesize;
} else {
dst = s->dest[0] + (block_num & 1) * 8 + ((block_num & 2) * 4 - 16) * linesize - 8;
}
if (s->mb_x != s->mb_width || !(block_num & 5)) {
int16_t (*mv)[2];
if (block_num > 3) {
right_cbp = v->cbp[s->mb_x - s->mb_stride] >> (block_num * 4);
right_is_intra = v->is_intra[s->mb_x - s->mb_stride] >> block_num;
mv = &v->luma_mv[s->mb_x - s->mb_stride - 1];
} else {
right_cbp = (block_num & 1) ? (v->cbp[s->mb_x - s->mb_stride] >> ((block_num - 1) * 4))
: (mb_cbp >> ((block_num + 1) * 4));
right_is_intra = (block_num & 1) ? (v->is_intra[s->mb_x - s->mb_stride] >> (block_num - 1))
: (mb_is_intra >> (block_num + 1));
mv = &s->current_picture.motion_val[0][s->block_index[block_num] - s->b8_stride * 2 - 2];
}
if (block_is_intra & 1 || right_is_intra & 1 || mv[0][0] != mv[1][0] || mv[0][1] != mv[1][1]) {
v->vc1dsp.vc1_h_loop_filter8(dst, linesize, v->pq);
} else {
idx = ((right_cbp >> 1) | block_cbp) & 5; // FIXME check
if (idx == 5) {
v->vc1dsp.vc1_h_loop_filter8(dst, linesize, v->pq);
} else if (idx) {
if (idx == 1)
v->vc1dsp.vc1_h_loop_filter4(dst + 4 * linesize, linesize, v->pq);
else
v->vc1dsp.vc1_h_loop_filter4(dst, linesize, v->pq);
}
}
}
dst -= 4;
ttblk = (v->ttblk[s->mb_x - s->mb_stride - 1] >> (block_num * 4)) & 0xf;
if (ttblk == TT_4X4 || ttblk == TT_4X8) {
idx = (block_cbp | (block_cbp >> 1)) & 5;
if (idx == 5) {
v->vc1dsp.vc1_h_loop_filter8(dst, linesize, v->pq);
} else if (idx) {
if (idx == 1)
v->vc1dsp.vc1_h_loop_filter4(dst + linesize * 4, linesize, v->pq);
else
v->vc1dsp.vc1_h_loop_filter4(dst, linesize, v->pq);
}
}
}
void ff_vc1_apply_p_loop_filter(VC1Context *v)
{
MpegEncContext *s = &v->s;
int i;
for (i = 0; i < 6; i++) {
vc1_apply_p_v_loop_filter(v, i);
}
/* V always precedes H, therefore we run H one MB before V;
* at the end of a row, we catch up to complete the row */
if (s->mb_x) {
for (i = 0; i < 6; i++) {
vc1_apply_p_h_loop_filter(v, i);
}
if (s->mb_x == s->mb_width - 1) {
s->mb_x++;
ff_update_block_index(s);
for (i = 0; i < 6; i++) {
vc1_apply_p_h_loop_filter(v, i);
}
}
}
}
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