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Further Implicit Segmentation Changes

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Trial use of a combination of reference frame,
prediction block size and mv to define segmentation.

Change-Id: Ie8946a0446dbad777fdcf7626f89e5af0994db50
This commit is contained in:
Paul Wilkins 2013-04-27 23:49:49 +01:00
parent 2cf0d4be12
commit 7d7e5b5131
2 changed files with 79 additions and 13 deletions
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64
vp9/common/vp9_seg_common.c
View File

@ -89,7 +89,7 @@ int vp9_check_segref(const MACROBLOCKD *xd, int segment_id,
#if CONFIG_IMPLICIT_SEGMENTATION
// This function defines an implicit segmentation for the next frame based
// on predcition and transform decisions in the current frame.
// For test purposes at the moment only TX size is used.
// For test purposes at the moment it uses ref frame and prediction size
void vp9_implicit_segment_map_update(VP9_COMMON * cm) {
int row, col;
MODE_INFO *mi, *mi_ptr = cm->mi;
@ -97,9 +97,66 @@ void vp9_implicit_segment_map_update(VP9_COMMON * cm) {
for (row = 0; row < cm->mb_rows; row++) {
mi = mi_ptr;
// Experimental use of tx size to define implicit segmentation
for (col = 0; col < cm->mb_cols; ++col, ++mi) {
map_ptr[col] = 1 + mi->mbmi.txfm_size;
// Inter prediction
if (mi->mbmi.ref_frame != INTRA_FRAME) {
// Zero motion and prediction block size >= 16
if ((mi->mbmi.sb_type >= BLOCK_SIZE_MB16X16) &&
(mi->mbmi.mv[0].as_int == 0))
map_ptr[col] = 1;
else if (mi->mbmi.sb_type >= BLOCK_SIZE_SB32X32)
map_ptr[col] = 2;
else if (mi->mbmi.sb_type >= BLOCK_SIZE_MB16X16)
map_ptr[col] = 3;
else
map_ptr[col] = 6;
// Intra prediction
} else {
if (mi->mbmi.sb_type >= BLOCK_SIZE_SB32X32)
map_ptr[col] = 4;
else if (mi->mbmi.sb_type >= BLOCK_SIZE_MB16X16)
map_ptr[col] = 5;
else
map_ptr[col] = 7;
}
}
mi_ptr += cm->mode_info_stride;
map_ptr += cm->mb_cols;
}
}
// This function defines an implicit segmentation for the next frame based
// on predcition and transform decisions in the current frame.
// For test purposes at the moment only TX size is used.
void vp9_implicit_segment_map_update_tx(VP9_COMMON * cm) {
int row, col;
MODE_INFO *mi, *mi_ptr = cm->mi;
unsigned char * map_ptr = cm->last_frame_seg_map;
for (row = 0; row < cm->mb_rows; row++) {
mi = mi_ptr;
for (col = 0; col < cm->mb_cols; ++col, ++mi) {
// Intra modes
if (mi->mbmi.ref_frame == INTRA_FRAME) {
if (mi->mbmi.txfm_size == TX_4X4)
map_ptr[col] = 7;
else if (mi->mbmi.txfm_size <= TX_16X16)
map_ptr[col] = 5;
else
map_ptr[col] = 4;
} else {
// Inter Modes
if (mi->mbmi.txfm_size == TX_4X4)
map_ptr[col] = 6;
else if (mi->mbmi.txfm_size == TX_8X8)
map_ptr[col] = 3;
else if (mi->mbmi.txfm_size == TX_16X16)
map_ptr[col] = 2;
else
map_ptr[col] = 1;
}
}
mi_ptr += cm->mode_info_stride;
map_ptr += cm->mb_cols;
@ -107,6 +164,7 @@ void vp9_implicit_segment_map_update(VP9_COMMON * cm) {
}
#endif
const vp9_tree_index vp9_segment_tree[14] = {
2, 4, 6, 8, 10, 12,
0, -1, -2, -3, -4, -5, -6, -7

28
vp9/encoder/vp9_onyx_if.c
View File

@ -487,12 +487,14 @@ static void configure_static_seg_features(VP9_COMP *cpi) {
}
#if CONFIG_IMPLICIT_SEGMENTATION
static void configure_implicit_segmentation(VP9_COMP *cpi) {
static double implict_seg_q_modifiers[MAX_MB_SEGMENTS] =
{1.0, 0.95, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0};
static void configure_implicit_segmentation(VP9_COMP *cpi, int frame_qindex) {
VP9_COMMON *cm = &cpi->common;
MACROBLOCKD *xd = &cpi->mb.e_mbd;
int i;
int qi_delta;
double q_target = cpi->active_worst_quality * 1.10;
double q_baseline = vp9_convert_qindex_to_q(frame_qindex);
// Set the flags to allow implicit segment update but disallow explicit update
xd->segmentation_enabled = 1;
@ -507,13 +509,19 @@ static void configure_implicit_segmentation(VP9_COMP *cpi) {
// Clear down the segment features.
vp9_clearall_segfeatures(xd);
xd->update_mb_segmentation_data = 0;
// Update the segment data if it is an arf or non overlay gf.
} else if (cpi->refresh_alt_ref_frame ||
(cpi->refresh_golden_frame && !cpi->is_src_frame_alt_ref)) {
xd->update_mb_segmentation_data = 1;
// Enable use of q deltas on segments 1 and up
// Segment 0 is treated as a neutral segment with no changes
for (i = 1; i < MAX_MB_SEGMENTS; ++i) {
qi_delta = compute_qdelta(cpi, cpi->active_worst_quality, q_target);
qi_delta = compute_qdelta(cpi, q_baseline,
implict_seg_q_modifiers[i] * q_baseline);
vp9_set_segdata(xd, i, SEG_LVL_ALT_Q, qi_delta);
q_target *= 0.95;
vp9_enable_segfeature(xd, i, SEG_LVL_ALT_Q);
}
@ -728,7 +736,7 @@ void vp9_set_speed_features(VP9_COMP *cpi) {
#if CONFIG_IMPLICIT_SEGMENTATION
sf->static_segmentation = 0;
#else
sf->static_segmentation = 1;
sf->static_segmentation = 0;
#endif
#endif
sf->splitmode_breakout = 0;
@ -747,7 +755,7 @@ void vp9_set_speed_features(VP9_COMP *cpi) {
#if CONFIG_IMPLICIT_SEGMENTATION
sf->static_segmentation = 0;
#else
sf->static_segmentation = 1;
sf->static_segmentation = 0;
#endif
#endif
sf->splitmode_breakout = 1;
@ -2944,13 +2952,13 @@ static void encode_frame_to_data_rate(VP9_COMP *cpi,
cpi->common.frame_context_idx = cpi->refresh_alt_ref_frame;
vp9_setup_inter_frame(cpi);
}
}
#if CONFIG_IMPLICIT_SEGMENTATION
if (!cm->error_resilient_mode && !cpi->sf.static_segmentation) {
configure_implicit_segmentation(cpi);
}
#endif
if (!cm->error_resilient_mode && !cpi->sf.static_segmentation) {
configure_implicit_segmentation(cpi, q);
}
#endif
// transform / motion compensation build reconstruction frame
#if CONFIG_MODELCOEFPROB