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avcodec/vc1: re-implement and expand VC-1 overlap smoothing

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The existing implementation did overlap smoothing for progressive
frames only. This rewritten version implements overlap smoothing
for all applicable frame types for both progessive and
frame/field-interlace.

Signed-off-by: Jerome Borsboom <jerome.borsboom@carpalis.nl>
This commit is contained in:
Jerome Borsboom 2018-04-23 20:58:31 +02:00 committed by Paul B Mahol
parent 0161d91db0
commit 5e5c9f1804
2 changed files with 96 additions and 0 deletions
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2
libavcodec/vc1.h
View File

@ -425,6 +425,8 @@ void ff_vc1_decode_blocks(VC1Context *v);
void ff_vc1_loop_filter_iblk(VC1Context *v, int pq);
void ff_vc1_loop_filter_iblk_delayed(VC1Context *v, int pq);
void ff_vc1_smooth_overlap_filter_iblk(VC1Context *v);
void ff_vc1_i_overlap_filter(VC1Context *v);
void ff_vc1_p_overlap_filter(VC1Context *v);
void ff_vc1_apply_p_loop_filter(VC1Context *v);
void ff_vc1_mc_1mv(VC1Context *v, int dir);

94
libavcodec/vc1_loopfilter.c
View File

@ -208,6 +208,100 @@ void ff_vc1_smooth_overlap_filter_iblk(VC1Context *v)
}
}
static av_always_inline void vc1_h_overlap_filter(VC1Context *v, int16_t (*left_block)[64],
int16_t (*right_block)[64], int block_num)
{
if (left_block != right_block || (block_num & 5) == 1) {
if (block_num > 3)
v->vc1dsp.vc1_h_s_overlap(left_block[block_num], right_block[block_num]);
else if (block_num & 1)
v->vc1dsp.vc1_h_s_overlap(right_block[block_num - 1], right_block[block_num]);
else
v->vc1dsp.vc1_h_s_overlap(left_block[block_num + 1], right_block[block_num]);
}
}
static av_always_inline void vc1_v_overlap_filter(VC1Context *v, int16_t (*top_block)[64],
int16_t (*bottom_block)[64], int block_num)
{
if (top_block != bottom_block || block_num & 2) {
if (block_num > 3)
v->vc1dsp.vc1_v_s_overlap(top_block[block_num], bottom_block[block_num]);
else if (block_num & 2)
v->vc1dsp.vc1_v_s_overlap(bottom_block[block_num - 2], bottom_block[block_num]);
else
v->vc1dsp.vc1_v_s_overlap(top_block[block_num + 2], bottom_block[block_num]);
}
}
void ff_vc1_i_overlap_filter(VC1Context *v)
{
MpegEncContext *s = &v->s;
int16_t (*topleft_blk)[64], (*top_blk)[64], (*left_blk)[64], (*cur_blk)[64];
int block_count = CONFIG_GRAY && (s->avctx->flags & AV_CODEC_FLAG_GRAY) ? 4 : 6;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int i;
topleft_blk = v->block[v->topleft_blk_idx];
top_blk = v->block[v->top_blk_idx];
left_blk = v->block[v->left_blk_idx];
cur_blk = v->block[v->cur_blk_idx];
/* Within a MB, the horizontal overlap always runs before the vertical.
* To accomplish that, we run the H on the left and internal vertical
* 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 on the top and internal horizontal
* borders. Therefore, the H overlap trails by one MB col and the
* V overlap trails by one MB row. This is reflected in the time at which
* we run the put_pixels loop, i.e. delayed by one row and one column. */
for (i = 0; i < block_count; i++)
if (v->pq >= 9 || v->condover == CONDOVER_ALL ||
(v->over_flags_plane[mb_pos] && ((i & 5) == 1 || v->over_flags_plane[mb_pos - 1])))
vc1_h_overlap_filter(v, s->mb_x ? left_blk : cur_blk, cur_blk, i);
if (v->fcm != ILACE_FRAME)
for (i = 0; i < block_count; i++) {
if (s->mb_x && (v->pq >= 9 || v->condover == CONDOVER_ALL ||
(v->over_flags_plane[mb_pos - 1] &&
((i & 2) || v->over_flags_plane[mb_pos - 1 - s->mb_stride]))))
vc1_v_overlap_filter(v, s->first_slice_line ? left_blk : topleft_blk, left_blk, i);
if (s->mb_x == s->mb_width - 1)
if (v->pq >= 9 || v->condover == CONDOVER_ALL ||
(v->over_flags_plane[mb_pos] &&
((i & 2) || v->over_flags_plane[mb_pos - s->mb_stride])))
vc1_v_overlap_filter(v, s->first_slice_line ? cur_blk : top_blk, cur_blk, i);
}
}
void ff_vc1_p_overlap_filter(VC1Context *v)
{
MpegEncContext *s = &v->s;
int16_t (*topleft_blk)[64], (*top_blk)[64], (*left_blk)[64], (*cur_blk)[64];
int block_count = CONFIG_GRAY && (s->avctx->flags & AV_CODEC_FLAG_GRAY) ? 4 : 6;
int i;
topleft_blk = v->block[v->topleft_blk_idx];
top_blk = v->block[v->top_blk_idx];
left_blk = v->block[v->left_blk_idx];
cur_blk = v->block[v->cur_blk_idx];
for (i = 0; i < block_count; i++)
if (v->mb_type[0][s->block_index[i]] && (s->mb_x == 0 || v->mb_type[0][s->block_index[i] - 1]))
vc1_h_overlap_filter(v, s->mb_x ? left_blk : cur_blk, cur_blk, i);
if (v->fcm != ILACE_FRAME)
for (i = 0; i < block_count; i++) {
if (s->mb_x && v->mb_type[0][s->block_index[i] - 1] &&
(s->first_slice_line || v->mb_type[0][s->block_index[i] - s->block_wrap[i] - 1]))
vc1_v_overlap_filter(v, s->first_slice_line ? left_blk : topleft_blk, left_blk, i);
if (s->mb_x == s->mb_width - 1)
if (v->mb_type[0][s->block_index[i]] &&
(s->first_slice_line || v->mb_type[0][s->block_index[i] - s->block_wrap[i]]))
vc1_v_overlap_filter(v, s->first_slice_line ? cur_blk : top_blk, cur_blk, i);
}
}
static av_always_inline void vc1_apply_p_v_loop_filter(VC1Context *v, int block_num)
{
MpegEncContext *s = &v->s;