ref: f7e4b72df8a0cd615660e9f9e3f443c8754134f1
dir: /vp9/common/vp9_seg_common.c/
/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <assert.h>
#include "vp9/common/vp9_blockd.h"
#include "vp9/common/vp9_seg_common.h"
static const int seg_feature_data_signed[SEG_LVL_MAX] = { 1, 1, 0, 0 };
static const int seg_feature_data_max[SEG_LVL_MAX] = { MAXQ, 63, 15, 15 };
// These functions provide access to new segment level features.
// Eventually these function may be "optimized out" but for the moment,
// the coding mechanism is still subject to change so these provide a
// convenient single point of change.
int vp9_segfeature_active(const MACROBLOCKD *xd, int segment_id,
SEG_LVL_FEATURES feature_id) {
return xd->segmentation_enabled &&
(xd->segment_feature_mask[segment_id] & (1 << feature_id));
}
void vp9_clearall_segfeatures(MACROBLOCKD *xd) {
vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
vpx_memset(xd->segment_feature_mask, 0, sizeof(xd->segment_feature_mask));
}
void vp9_enable_segfeature(MACROBLOCKD *xd, int segment_id,
SEG_LVL_FEATURES feature_id) {
xd->segment_feature_mask[segment_id] |= 1 << feature_id;
}
void vp9_disable_segfeature(MACROBLOCKD *xd, int segment_id,
SEG_LVL_FEATURES feature_id) {
xd->segment_feature_mask[segment_id] &= ~(1 << feature_id);
}
int vp9_seg_feature_data_max(SEG_LVL_FEATURES feature_id) {
return seg_feature_data_max[feature_id];
}
int vp9_is_segfeature_signed(SEG_LVL_FEATURES feature_id) {
return seg_feature_data_signed[feature_id];
}
void vp9_clear_segdata(MACROBLOCKD *xd, int segment_id,
SEG_LVL_FEATURES feature_id) {
xd->segment_feature_data[segment_id][feature_id] = 0;
}
void vp9_set_segdata(MACROBLOCKD *xd, int segment_id,
SEG_LVL_FEATURES feature_id, int seg_data) {
assert(seg_data <= seg_feature_data_max[feature_id]);
if (seg_data < 0) {
assert(seg_feature_data_signed[feature_id]);
assert(-seg_data <= seg_feature_data_max[feature_id]);
}
xd->segment_feature_data[segment_id][feature_id] = seg_data;
}
int vp9_get_segdata(const MACROBLOCKD *xd, int segment_id,
SEG_LVL_FEATURES feature_id) {
return xd->segment_feature_data[segment_id][feature_id];
}
void vp9_clear_segref(MACROBLOCKD *xd, int segment_id) {
xd->segment_feature_data[segment_id][SEG_LVL_REF_FRAME] = 0;
}
void vp9_set_segref(MACROBLOCKD *xd, int segment_id,
MV_REFERENCE_FRAME ref_frame) {
xd->segment_feature_data[segment_id][SEG_LVL_REF_FRAME] |= 1 << ref_frame;
}
int vp9_check_segref(const MACROBLOCKD *xd, int segment_id,
MV_REFERENCE_FRAME ref_frame) {
return (xd->segment_feature_data[segment_id][SEG_LVL_REF_FRAME] &
(1 << ref_frame)) ? 1 : 0;
}
#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 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;
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) {
// 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;
}
}
#endif
const vp9_tree_index vp9_segment_tree[14] = {
2, 4, 6, 8, 10, 12,
0, -1, -2, -3, -4, -5, -6, -7
};
// TBD? Functions to read and write segment data with range / validity checking