340 lines
14 KiB
C
340 lines
14 KiB
C
|
|
/*
|
|
* Copyright (c) 2012 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 "vp10/common/common.h"
|
|
#include "vp10/common/pred_common.h"
|
|
#include "vp10/common/seg_common.h"
|
|
|
|
// Returns a context number for the given MB prediction signal
|
|
int vp10_get_pred_context_switchable_interp(const MACROBLOCKD *xd) {
|
|
// Note:
|
|
// The mode info data structure has a one element border above and to the
|
|
// left of the entries correpsonding to real macroblocks.
|
|
// The prediction flags in these dummy entries are initialised to 0.
|
|
const MB_MODE_INFO *const left_mbmi = xd->left_mbmi;
|
|
const int left_type = xd->left_available && is_inter_block(left_mbmi) ?
|
|
left_mbmi->interp_filter : SWITCHABLE_FILTERS;
|
|
const MB_MODE_INFO *const above_mbmi = xd->above_mbmi;
|
|
const int above_type = xd->up_available && is_inter_block(above_mbmi) ?
|
|
above_mbmi->interp_filter : SWITCHABLE_FILTERS;
|
|
|
|
if (left_type == above_type)
|
|
return left_type;
|
|
else if (left_type == SWITCHABLE_FILTERS && above_type != SWITCHABLE_FILTERS)
|
|
return above_type;
|
|
else if (left_type != SWITCHABLE_FILTERS && above_type == SWITCHABLE_FILTERS)
|
|
return left_type;
|
|
else
|
|
return SWITCHABLE_FILTERS;
|
|
}
|
|
|
|
// The mode info data structure has a one element border above and to the
|
|
// left of the entries corresponding to real macroblocks.
|
|
// The prediction flags in these dummy entries are initialized to 0.
|
|
// 0 - inter/inter, inter/--, --/inter, --/--
|
|
// 1 - intra/inter, inter/intra
|
|
// 2 - intra/--, --/intra
|
|
// 3 - intra/intra
|
|
int vp10_get_intra_inter_context(const MACROBLOCKD *xd) {
|
|
const MB_MODE_INFO *const above_mbmi = xd->above_mbmi;
|
|
const MB_MODE_INFO *const left_mbmi = xd->left_mbmi;
|
|
const int has_above = xd->up_available;
|
|
const int has_left = xd->left_available;
|
|
|
|
if (has_above && has_left) { // both edges available
|
|
const int above_intra = !is_inter_block(above_mbmi);
|
|
const int left_intra = !is_inter_block(left_mbmi);
|
|
return left_intra && above_intra ? 3
|
|
: left_intra || above_intra;
|
|
} else if (has_above || has_left) { // one edge available
|
|
return 2 * !is_inter_block(has_above ? above_mbmi : left_mbmi);
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int vp10_get_reference_mode_context(const VP10_COMMON *cm,
|
|
const MACROBLOCKD *xd) {
|
|
int ctx;
|
|
const MB_MODE_INFO *const above_mbmi = xd->above_mbmi;
|
|
const MB_MODE_INFO *const left_mbmi = xd->left_mbmi;
|
|
const int has_above = xd->up_available;
|
|
const int has_left = xd->left_available;
|
|
// Note:
|
|
// The mode info data structure has a one element border above and to the
|
|
// left of the entries correpsonding to real macroblocks.
|
|
// The prediction flags in these dummy entries are initialised to 0.
|
|
if (has_above && has_left) { // both edges available
|
|
if (!has_second_ref(above_mbmi) && !has_second_ref(left_mbmi))
|
|
// neither edge uses comp pred (0/1)
|
|
ctx = (above_mbmi->ref_frame[0] == cm->comp_fixed_ref) ^
|
|
(left_mbmi->ref_frame[0] == cm->comp_fixed_ref);
|
|
else if (!has_second_ref(above_mbmi))
|
|
// one of two edges uses comp pred (2/3)
|
|
ctx = 2 + (above_mbmi->ref_frame[0] == cm->comp_fixed_ref ||
|
|
!is_inter_block(above_mbmi));
|
|
else if (!has_second_ref(left_mbmi))
|
|
// one of two edges uses comp pred (2/3)
|
|
ctx = 2 + (left_mbmi->ref_frame[0] == cm->comp_fixed_ref ||
|
|
!is_inter_block(left_mbmi));
|
|
else // both edges use comp pred (4)
|
|
ctx = 4;
|
|
} else if (has_above || has_left) { // one edge available
|
|
const MB_MODE_INFO *edge_mbmi = has_above ? above_mbmi : left_mbmi;
|
|
|
|
if (!has_second_ref(edge_mbmi))
|
|
// edge does not use comp pred (0/1)
|
|
ctx = edge_mbmi->ref_frame[0] == cm->comp_fixed_ref;
|
|
else
|
|
// edge uses comp pred (3)
|
|
ctx = 3;
|
|
} else { // no edges available (1)
|
|
ctx = 1;
|
|
}
|
|
assert(ctx >= 0 && ctx < COMP_INTER_CONTEXTS);
|
|
return ctx;
|
|
}
|
|
|
|
// Returns a context number for the given MB prediction signal
|
|
int vp10_get_pred_context_comp_ref_p(const VP10_COMMON *cm,
|
|
const MACROBLOCKD *xd) {
|
|
int pred_context;
|
|
const MB_MODE_INFO *const above_mbmi = xd->above_mbmi;
|
|
const MB_MODE_INFO *const left_mbmi = xd->left_mbmi;
|
|
const int above_in_image = xd->up_available;
|
|
const int left_in_image = xd->left_available;
|
|
|
|
// Note:
|
|
// The mode info data structure has a one element border above and to the
|
|
// left of the entries correpsonding to real macroblocks.
|
|
// The prediction flags in these dummy entries are initialised to 0.
|
|
const int fix_ref_idx = cm->ref_frame_sign_bias[cm->comp_fixed_ref];
|
|
const int var_ref_idx = !fix_ref_idx;
|
|
|
|
if (above_in_image && left_in_image) { // both edges available
|
|
const int above_intra = !is_inter_block(above_mbmi);
|
|
const int left_intra = !is_inter_block(left_mbmi);
|
|
|
|
if (above_intra && left_intra) { // intra/intra (2)
|
|
pred_context = 2;
|
|
} else if (above_intra || left_intra) { // intra/inter
|
|
const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi;
|
|
|
|
if (!has_second_ref(edge_mbmi)) // single pred (1/3)
|
|
pred_context = 1 + 2 * (edge_mbmi->ref_frame[0] != cm->comp_var_ref[1]);
|
|
else // comp pred (1/3)
|
|
pred_context = 1 + 2 * (edge_mbmi->ref_frame[var_ref_idx]
|
|
!= cm->comp_var_ref[1]);
|
|
} else { // inter/inter
|
|
const int l_sg = !has_second_ref(left_mbmi);
|
|
const int a_sg = !has_second_ref(above_mbmi);
|
|
const MV_REFERENCE_FRAME vrfa = a_sg ? above_mbmi->ref_frame[0]
|
|
: above_mbmi->ref_frame[var_ref_idx];
|
|
const MV_REFERENCE_FRAME vrfl = l_sg ? left_mbmi->ref_frame[0]
|
|
: left_mbmi->ref_frame[var_ref_idx];
|
|
|
|
if (vrfa == vrfl && cm->comp_var_ref[1] == vrfa) {
|
|
pred_context = 0;
|
|
} else if (l_sg && a_sg) { // single/single
|
|
if ((vrfa == cm->comp_fixed_ref && vrfl == cm->comp_var_ref[0]) ||
|
|
(vrfl == cm->comp_fixed_ref && vrfa == cm->comp_var_ref[0]))
|
|
pred_context = 4;
|
|
else if (vrfa == vrfl)
|
|
pred_context = 3;
|
|
else
|
|
pred_context = 1;
|
|
} else if (l_sg || a_sg) { // single/comp
|
|
const MV_REFERENCE_FRAME vrfc = l_sg ? vrfa : vrfl;
|
|
const MV_REFERENCE_FRAME rfs = a_sg ? vrfa : vrfl;
|
|
if (vrfc == cm->comp_var_ref[1] && rfs != cm->comp_var_ref[1])
|
|
pred_context = 1;
|
|
else if (rfs == cm->comp_var_ref[1] && vrfc != cm->comp_var_ref[1])
|
|
pred_context = 2;
|
|
else
|
|
pred_context = 4;
|
|
} else if (vrfa == vrfl) { // comp/comp
|
|
pred_context = 4;
|
|
} else {
|
|
pred_context = 2;
|
|
}
|
|
}
|
|
} else if (above_in_image || left_in_image) { // one edge available
|
|
const MB_MODE_INFO *edge_mbmi = above_in_image ? above_mbmi : left_mbmi;
|
|
|
|
if (!is_inter_block(edge_mbmi)) {
|
|
pred_context = 2;
|
|
} else {
|
|
if (has_second_ref(edge_mbmi))
|
|
pred_context = 4 * (edge_mbmi->ref_frame[var_ref_idx]
|
|
!= cm->comp_var_ref[1]);
|
|
else
|
|
pred_context = 3 * (edge_mbmi->ref_frame[0] != cm->comp_var_ref[1]);
|
|
}
|
|
} else { // no edges available (2)
|
|
pred_context = 2;
|
|
}
|
|
assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
|
|
|
|
return pred_context;
|
|
}
|
|
|
|
int vp10_get_pred_context_single_ref_p1(const MACROBLOCKD *xd) {
|
|
int pred_context;
|
|
const MB_MODE_INFO *const above_mbmi = xd->above_mbmi;
|
|
const MB_MODE_INFO *const left_mbmi = xd->left_mbmi;
|
|
const int has_above = xd->up_available;
|
|
const int has_left = xd->left_available;
|
|
// Note:
|
|
// The mode info data structure has a one element border above and to the
|
|
// left of the entries correpsonding to real macroblocks.
|
|
// The prediction flags in these dummy entries are initialised to 0.
|
|
if (has_above && has_left) { // both edges available
|
|
const int above_intra = !is_inter_block(above_mbmi);
|
|
const int left_intra = !is_inter_block(left_mbmi);
|
|
|
|
if (above_intra && left_intra) { // intra/intra
|
|
pred_context = 2;
|
|
} else if (above_intra || left_intra) { // intra/inter or inter/intra
|
|
const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi;
|
|
if (!has_second_ref(edge_mbmi))
|
|
pred_context = 4 * (edge_mbmi->ref_frame[0] == LAST_FRAME);
|
|
else
|
|
pred_context = 1 + (edge_mbmi->ref_frame[0] == LAST_FRAME ||
|
|
edge_mbmi->ref_frame[1] == LAST_FRAME);
|
|
} else { // inter/inter
|
|
const int above_has_second = has_second_ref(above_mbmi);
|
|
const int left_has_second = has_second_ref(left_mbmi);
|
|
const MV_REFERENCE_FRAME above0 = above_mbmi->ref_frame[0];
|
|
const MV_REFERENCE_FRAME above1 = above_mbmi->ref_frame[1];
|
|
const MV_REFERENCE_FRAME left0 = left_mbmi->ref_frame[0];
|
|
const MV_REFERENCE_FRAME left1 = left_mbmi->ref_frame[1];
|
|
|
|
if (above_has_second && left_has_second) {
|
|
pred_context = 1 + (above0 == LAST_FRAME || above1 == LAST_FRAME ||
|
|
left0 == LAST_FRAME || left1 == LAST_FRAME);
|
|
} else if (above_has_second || left_has_second) {
|
|
const MV_REFERENCE_FRAME rfs = !above_has_second ? above0 : left0;
|
|
const MV_REFERENCE_FRAME crf1 = above_has_second ? above0 : left0;
|
|
const MV_REFERENCE_FRAME crf2 = above_has_second ? above1 : left1;
|
|
|
|
if (rfs == LAST_FRAME)
|
|
pred_context = 3 + (crf1 == LAST_FRAME || crf2 == LAST_FRAME);
|
|
else
|
|
pred_context = (crf1 == LAST_FRAME || crf2 == LAST_FRAME);
|
|
} else {
|
|
pred_context = 2 * (above0 == LAST_FRAME) + 2 * (left0 == LAST_FRAME);
|
|
}
|
|
}
|
|
} else if (has_above || has_left) { // one edge available
|
|
const MB_MODE_INFO *edge_mbmi = has_above ? above_mbmi : left_mbmi;
|
|
if (!is_inter_block(edge_mbmi)) { // intra
|
|
pred_context = 2;
|
|
} else { // inter
|
|
if (!has_second_ref(edge_mbmi))
|
|
pred_context = 4 * (edge_mbmi->ref_frame[0] == LAST_FRAME);
|
|
else
|
|
pred_context = 1 + (edge_mbmi->ref_frame[0] == LAST_FRAME ||
|
|
edge_mbmi->ref_frame[1] == LAST_FRAME);
|
|
}
|
|
} else { // no edges available
|
|
pred_context = 2;
|
|
}
|
|
|
|
assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
|
|
return pred_context;
|
|
}
|
|
|
|
int vp10_get_pred_context_single_ref_p2(const MACROBLOCKD *xd) {
|
|
int pred_context;
|
|
const MB_MODE_INFO *const above_mbmi = xd->above_mbmi;
|
|
const MB_MODE_INFO *const left_mbmi = xd->left_mbmi;
|
|
const int has_above = xd->up_available;
|
|
const int has_left = xd->left_available;
|
|
|
|
// Note:
|
|
// The mode info data structure has a one element border above and to the
|
|
// left of the entries correpsonding to real macroblocks.
|
|
// The prediction flags in these dummy entries are initialised to 0.
|
|
if (has_above && has_left) { // both edges available
|
|
const int above_intra = !is_inter_block(above_mbmi);
|
|
const int left_intra = !is_inter_block(left_mbmi);
|
|
|
|
if (above_intra && left_intra) { // intra/intra
|
|
pred_context = 2;
|
|
} else if (above_intra || left_intra) { // intra/inter or inter/intra
|
|
const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi;
|
|
if (!has_second_ref(edge_mbmi)) {
|
|
if (edge_mbmi->ref_frame[0] == LAST_FRAME)
|
|
pred_context = 3;
|
|
else
|
|
pred_context = 4 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME);
|
|
} else {
|
|
pred_context = 1 + 2 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME ||
|
|
edge_mbmi->ref_frame[1] == GOLDEN_FRAME);
|
|
}
|
|
} else { // inter/inter
|
|
const int above_has_second = has_second_ref(above_mbmi);
|
|
const int left_has_second = has_second_ref(left_mbmi);
|
|
const MV_REFERENCE_FRAME above0 = above_mbmi->ref_frame[0];
|
|
const MV_REFERENCE_FRAME above1 = above_mbmi->ref_frame[1];
|
|
const MV_REFERENCE_FRAME left0 = left_mbmi->ref_frame[0];
|
|
const MV_REFERENCE_FRAME left1 = left_mbmi->ref_frame[1];
|
|
|
|
if (above_has_second && left_has_second) {
|
|
if (above0 == left0 && above1 == left1)
|
|
pred_context = 3 * (above0 == GOLDEN_FRAME ||
|
|
above1 == GOLDEN_FRAME ||
|
|
left0 == GOLDEN_FRAME ||
|
|
left1 == GOLDEN_FRAME);
|
|
else
|
|
pred_context = 2;
|
|
} else if (above_has_second || left_has_second) {
|
|
const MV_REFERENCE_FRAME rfs = !above_has_second ? above0 : left0;
|
|
const MV_REFERENCE_FRAME crf1 = above_has_second ? above0 : left0;
|
|
const MV_REFERENCE_FRAME crf2 = above_has_second ? above1 : left1;
|
|
|
|
if (rfs == GOLDEN_FRAME)
|
|
pred_context = 3 + (crf1 == GOLDEN_FRAME || crf2 == GOLDEN_FRAME);
|
|
else if (rfs == ALTREF_FRAME)
|
|
pred_context = crf1 == GOLDEN_FRAME || crf2 == GOLDEN_FRAME;
|
|
else
|
|
pred_context = 1 + 2 * (crf1 == GOLDEN_FRAME || crf2 == GOLDEN_FRAME);
|
|
} else {
|
|
if (above0 == LAST_FRAME && left0 == LAST_FRAME) {
|
|
pred_context = 3;
|
|
} else if (above0 == LAST_FRAME || left0 == LAST_FRAME) {
|
|
const MV_REFERENCE_FRAME edge0 = (above0 == LAST_FRAME) ? left0
|
|
: above0;
|
|
pred_context = 4 * (edge0 == GOLDEN_FRAME);
|
|
} else {
|
|
pred_context = 2 * (above0 == GOLDEN_FRAME) +
|
|
2 * (left0 == GOLDEN_FRAME);
|
|
}
|
|
}
|
|
}
|
|
} else if (has_above || has_left) { // one edge available
|
|
const MB_MODE_INFO *edge_mbmi = has_above ? above_mbmi : left_mbmi;
|
|
|
|
if (!is_inter_block(edge_mbmi) ||
|
|
(edge_mbmi->ref_frame[0] == LAST_FRAME && !has_second_ref(edge_mbmi)))
|
|
pred_context = 2;
|
|
else if (!has_second_ref(edge_mbmi))
|
|
pred_context = 4 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME);
|
|
else
|
|
pred_context = 3 * (edge_mbmi->ref_frame[0] == GOLDEN_FRAME ||
|
|
edge_mbmi->ref_frame[1] == GOLDEN_FRAME);
|
|
} else { // no edges available (2)
|
|
pred_context = 2;
|
|
}
|
|
assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
|
|
return pred_context;
|
|
}
|