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Enable various thresholds of motion detection

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This commit changed to enable the encoder to adjust motion dection
speed threshold based on picture size. In addition, cpu-used 1 now
does a partition search every other frame instead of every third
frame for low resolution inputs.

The change has no quality/speed impact for 720p and above. Test
showed the change increase encoding time by between 3% to 6% for
cpu-used 2 encodiong of 360p sequences. It also has a compression
gain about .3%.

For cpu-used 2, the change resolved some very disturbing visual
artifacts in certain sequences when large block partitionings and
transforms are used as a result of copying the partition from a
previous frame.

Change-Id: Ic7fd22508cdb811d4ca935655adbf20109286cfa
This commit is contained in:
Yaowu Xu 2014-05-20 11:36:44 -07:00
parent d83295f2e1
commit 3bda7ec1ba
3 changed files with 25 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
vp9/encoder/vp9_encodeframe.c
View File

@ -1312,7 +1312,8 @@ static int is_background(VP9_COMP *cpi, const TileInfo *const tile,
return x->in_static_area;
}
static int sb_has_motion(const VP9_COMMON *cm, MODE_INFO **prev_mi_8x8) {
static int sb_has_motion(const VP9_COMMON *cm, MODE_INFO **prev_mi_8x8,
const int motion_thresh) {
const int mis = cm->mi_stride;
int block_row, block_col;
@ -1321,8 +1322,8 @@ static int sb_has_motion(const VP9_COMMON *cm, MODE_INFO **prev_mi_8x8) {
for (block_col = 0; block_col < 8; ++block_col) {
const MODE_INFO *prev_mi = prev_mi_8x8[block_row * mis + block_col];
if (prev_mi) {
if (abs(prev_mi->mbmi.mv[0].as_mv.row) >= 8 ||
abs(prev_mi->mbmi.mv[0].as_mv.col) >= 8)
if (abs(prev_mi->mbmi.mv[0].as_mv.row) > motion_thresh ||
abs(prev_mi->mbmi.mv[0].as_mv.col) > motion_thresh)
return 1;
}
}
@ -2318,7 +2319,7 @@ static void encode_rd_sb_row(VP9_COMP *cpi, const TileInfo *const tile,
|| cpi->rc.is_src_frame_alt_ref
|| ((sf->use_lastframe_partitioning ==
LAST_FRAME_PARTITION_LOW_MOTION) &&
sb_has_motion(cm, prev_mi))) {
sb_has_motion(cm, prev_mi, sf->lf_motion_threshold))) {
// If required set upper and lower partition size limits
if (sf->auto_min_max_partition_size) {
set_offsets(cpi, tile, mi_row, mi_col, BLOCK_64X64);
@ -2331,7 +2332,7 @@ static void encode_rd_sb_row(VP9_COMP *cpi, const TileInfo *const tile,
cpi->pc_root);
} else {
if (sf->constrain_copy_partition &&
sb_has_motion(cm, prev_mi))
sb_has_motion(cm, prev_mi, sf->lf_motion_threshold))
constrain_copy_partitioning(cpi, tile, mi, prev_mi,
mi_row, mi_col, BLOCK_16X16);
else

14
vp9/encoder/vp9_speed_features.c
View File

@ -80,12 +80,16 @@ static void set_good_speed_feature(VP9_COMP *cpi, VP9_COMMON *cm,
}
if (speed >= 2) {
if (MIN(cm->width, cm->height) >= 720)
if (MIN(cm->width, cm->height) >= 720) {
sf->lf_motion_threshold = LOW_MOITION_THRESHOLD;
sf->last_partitioning_redo_frequency = 3;
sf->disable_split_mask = cm->show_frame ? DISABLE_ALL_SPLIT
: DISABLE_ALL_INTER_SPLIT;
else
} else {
sf->disable_split_mask = LAST_AND_INTRA_SPLIT_ONLY;
sf->last_partitioning_redo_frequency = 2;
sf->lf_motion_threshold = NO_MOITION_THRESHOLD;
}
sf->adaptive_pred_interp_filter = 2;
sf->reference_masking = 1;
sf->mode_search_skip_flags = FLAG_SKIP_INTRA_DIRMISMATCH |
@ -97,7 +101,6 @@ static void set_good_speed_feature(VP9_COMP *cpi, VP9_COMMON *cm,
sf->auto_min_max_partition_size = RELAXED_NEIGHBORING_MIN_MAX;
sf->use_lastframe_partitioning = LAST_FRAME_PARTITION_LOW_MOTION;
sf->adjust_partitioning_from_last_frame = 1;
sf->last_partitioning_redo_frequency = 3;
}
if (speed >= 3) {
@ -108,6 +111,8 @@ static void set_good_speed_feature(VP9_COMP *cpi, VP9_COMMON *cm,
else
sf->disable_split_mask = DISABLE_ALL_INTER_SPLIT;
sf->lf_motion_threshold = LOW_MOITION_THRESHOLD;
sf->last_partitioning_redo_frequency = 3;
sf->recode_loop = ALLOW_RECODE_KFMAXBW;
sf->adaptive_rd_thresh = 3;
sf->mode_skip_start = 6;
@ -198,6 +203,7 @@ static void set_rt_speed_feature(VP9_COMMON *cm, SPEED_FEATURES *sf,
sf->auto_min_max_partition_size = RELAXED_NEIGHBORING_MIN_MAX;
sf->use_lastframe_partitioning = LAST_FRAME_PARTITION_LOW_MOTION;
sf->lf_motion_threshold = LOW_MOITION_THRESHOLD;
sf->adjust_partitioning_from_last_frame = 1;
sf->last_partitioning_redo_frequency = 3;

9
vp9/encoder/vp9_speed_features.h
View File

@ -43,6 +43,11 @@ typedef enum {
// Other methods to come
} SUBPEL_SEARCH_METHODS;
typedef enum {
NO_MOITION_THRESHOLD = 0,
LOW_MOITION_THRESHOLD = 7
} MOTION_THRESHOLD;
typedef enum {
LAST_FRAME_PARTITION_OFF = 0,
LAST_FRAME_PARTITION_LOW_MOTION = 1,
@ -200,6 +205,10 @@ typedef struct SPEED_FEATURES {
// partitioning.
LAST_FRAME_PARTITION_METHOD use_lastframe_partitioning;
// The threshold is to determine how slow the motino is, it is used when
// use_lastframe_partitioning is set to LAST_FRAME_PARTITION_LOW_MOTION
MOTION_THRESHOLD lf_motion_threshold;
// Determine which method we use to determine transform size. We can choose
// between options like full rd, largest for prediction size, largest
// for intra and model coefs for the rest.