1329 строки
53 KiB
C
1329 строки
53 KiB
C
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/*
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* Copyright (c) 2012 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "av1/common/common.h"
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#include "av1/common/pred_common.h"
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#include "av1/common/reconinter.h"
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#include "av1/common/seg_common.h"
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// Returns a context number for the given MB prediction signal
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#if CONFIG_DUAL_FILTER
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static InterpFilter get_ref_filter_type(const MODE_INFO *mi,
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const MACROBLOCKD *xd, int dir,
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MV_REFERENCE_FRAME ref_frame) {
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InterpFilter ref_type = SWITCHABLE_FILTERS;
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const MB_MODE_INFO *ref_mbmi = &mi->mbmi;
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int use_subpel[2] = {
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has_subpel_mv_component(mi, xd, dir),
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has_subpel_mv_component(mi, xd, dir + 2),
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};
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if (ref_mbmi->ref_frame[0] == ref_frame && use_subpel[0])
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ref_type = ref_mbmi->interp_filter[(dir & 0x01)];
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else if (ref_mbmi->ref_frame[1] == ref_frame && use_subpel[1])
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ref_type = ref_mbmi->interp_filter[(dir & 0x01) + 2];
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return ref_type;
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}
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int av1_get_pred_context_switchable_interp(const MACROBLOCKD *xd, int dir) {
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const MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
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const int ctx_offset =
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(mbmi->ref_frame[1] > INTRA_FRAME) * INTER_FILTER_COMP_OFFSET;
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MV_REFERENCE_FRAME ref_frame =
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(dir < 2) ? mbmi->ref_frame[0] : mbmi->ref_frame[1];
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// Note:
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// The mode info data structure has a one element border above and to the
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// left of the entries corresponding to real macroblocks.
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// The prediction flags in these dummy entries are initialized to 0.
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int filter_type_ctx = ctx_offset + (dir & 0x01) * INTER_FILTER_DIR_OFFSET;
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int left_type = SWITCHABLE_FILTERS;
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int above_type = SWITCHABLE_FILTERS;
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if (xd->left_available)
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left_type = get_ref_filter_type(xd->mi[-1], xd, dir, ref_frame);
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if (xd->up_available)
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above_type =
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get_ref_filter_type(xd->mi[-xd->mi_stride], xd, dir, ref_frame);
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if (left_type == above_type)
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filter_type_ctx += left_type;
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else if (left_type == SWITCHABLE_FILTERS && above_type != SWITCHABLE_FILTERS)
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filter_type_ctx += above_type;
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else if (left_type != SWITCHABLE_FILTERS && above_type == SWITCHABLE_FILTERS)
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filter_type_ctx += left_type;
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else
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filter_type_ctx += SWITCHABLE_FILTERS;
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return filter_type_ctx;
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}
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#else
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int av1_get_pred_context_switchable_interp(const MACROBLOCKD *xd) {
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// Note:
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// The mode info data structure has a one element border above and to the
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// left of the entries corresponding to real macroblocks.
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// The prediction flags in these dummy entries are initialized to 0.
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const MB_MODE_INFO *const left_mbmi = xd->left_mbmi;
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const int left_type = xd->left_available && is_inter_block(left_mbmi)
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? left_mbmi->interp_filter
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: SWITCHABLE_FILTERS;
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const MB_MODE_INFO *const above_mbmi = xd->above_mbmi;
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const int above_type = xd->up_available && is_inter_block(above_mbmi)
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? above_mbmi->interp_filter
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: SWITCHABLE_FILTERS;
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if (left_type == above_type)
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return left_type;
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else if (left_type == SWITCHABLE_FILTERS && above_type != SWITCHABLE_FILTERS)
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return above_type;
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else if (left_type != SWITCHABLE_FILTERS && above_type == SWITCHABLE_FILTERS)
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return left_type;
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else
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return SWITCHABLE_FILTERS;
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}
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#endif
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#if CONFIG_EXT_INTRA
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// Obtain the reference filter type from the above/left neighbor blocks.
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static INTRA_FILTER get_ref_intra_filter(const MB_MODE_INFO *ref_mbmi) {
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INTRA_FILTER ref_type = INTRA_FILTERS;
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if (ref_mbmi->sb_type >= BLOCK_8X8) {
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PREDICTION_MODE mode = ref_mbmi->mode;
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if (is_inter_block(ref_mbmi)) {
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#if CONFIG_DUAL_FILTER
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switch (ref_mbmi->interp_filter[0]) {
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#else
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switch (ref_mbmi->interp_filter) {
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#endif
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case EIGHTTAP_REGULAR: ref_type = INTRA_FILTER_8TAP; break;
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case EIGHTTAP_SMOOTH: ref_type = INTRA_FILTER_8TAP_SMOOTH; break;
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case MULTITAP_SHARP: ref_type = INTRA_FILTER_8TAP_SHARP; break;
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case BILINEAR: ref_type = INTRA_FILTERS; break;
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default: break;
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}
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} else {
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if (mode != DC_PRED && mode != TM_PRED) {
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int p_angle =
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mode_to_angle_map[mode] + ref_mbmi->angle_delta[0] * ANGLE_STEP;
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if (av1_is_intra_filter_switchable(p_angle)) {
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ref_type = ref_mbmi->intra_filter;
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}
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}
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}
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}
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return ref_type;
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}
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int av1_get_pred_context_intra_interp(const MACROBLOCKD *xd) {
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int left_type = INTRA_FILTERS, above_type = INTRA_FILTERS;
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if (xd->left_available) left_type = get_ref_intra_filter(xd->left_mbmi);
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if (xd->up_available) above_type = get_ref_intra_filter(xd->above_mbmi);
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if (left_type == above_type)
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return left_type;
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else if (left_type == INTRA_FILTERS && above_type != INTRA_FILTERS)
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return above_type;
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else if (left_type != INTRA_FILTERS && above_type == INTRA_FILTERS)
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return left_type;
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else
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return INTRA_FILTERS;
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}
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#endif // CONFIG_EXT_INTRA
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// The mode info data structure has a one element border above and to the
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// left of the entries corresponding to real macroblocks.
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// The prediction flags in these dummy entries are initialized to 0.
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// 0 - inter/inter, inter/--, --/inter, --/--
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// 1 - intra/inter, inter/intra
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// 2 - intra/--, --/intra
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// 3 - intra/intra
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int av1_get_intra_inter_context(const MACROBLOCKD *xd) {
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const MB_MODE_INFO *const above_mbmi = xd->above_mbmi;
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const MB_MODE_INFO *const left_mbmi = xd->left_mbmi;
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const int has_above = xd->up_available;
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const int has_left = xd->left_available;
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if (has_above && has_left) { // both edges available
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const int above_intra = !is_inter_block(above_mbmi);
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const int left_intra = !is_inter_block(left_mbmi);
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return left_intra && above_intra ? 3 : left_intra || above_intra;
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} else if (has_above || has_left) { // one edge available
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return 2 * !is_inter_block(has_above ? above_mbmi : left_mbmi);
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} else {
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return 0;
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}
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}
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#if CONFIG_EXT_REFS
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#define CHECK_BACKWARD_REFS(ref_frame) \
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(((ref_frame) >= BWDREF_FRAME) && ((ref_frame) <= ALTREF_FRAME))
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#define IS_BACKWARD_REF_FRAME(ref_frame) CHECK_BACKWARD_REFS(ref_frame)
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#else
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#define IS_BACKWARD_REF_FRAME(ref_frame) ((ref_frame) == cm->comp_fixed_ref)
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#endif // CONFIG_EXT_REFS
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int av1_get_reference_mode_context(const AV1_COMMON *cm,
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const MACROBLOCKD *xd) {
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int ctx;
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const MB_MODE_INFO *const above_mbmi = xd->above_mbmi;
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const MB_MODE_INFO *const left_mbmi = xd->left_mbmi;
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const int has_above = xd->up_available;
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const int has_left = xd->left_available;
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#if CONFIG_EXT_REFS
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(void)cm;
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#endif // CONFIG_EXT_REFS
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// Note:
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// The mode info data structure has a one element border above and to the
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// left of the entries corresponding to real macroblocks.
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// The prediction flags in these dummy entries are initialized to 0.
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if (has_above && has_left) { // both edges available
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if (!has_second_ref(above_mbmi) && !has_second_ref(left_mbmi))
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// neither edge uses comp pred (0/1)
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ctx = IS_BACKWARD_REF_FRAME(above_mbmi->ref_frame[0]) ^
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IS_BACKWARD_REF_FRAME(left_mbmi->ref_frame[0]);
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else if (!has_second_ref(above_mbmi))
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// one of two edges uses comp pred (2/3)
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ctx = 2 + (IS_BACKWARD_REF_FRAME(above_mbmi->ref_frame[0]) ||
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!is_inter_block(above_mbmi));
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else if (!has_second_ref(left_mbmi))
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// one of two edges uses comp pred (2/3)
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ctx = 2 + (IS_BACKWARD_REF_FRAME(left_mbmi->ref_frame[0]) ||
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!is_inter_block(left_mbmi));
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else // both edges use comp pred (4)
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ctx = 4;
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} else if (has_above || has_left) { // one edge available
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const MB_MODE_INFO *edge_mbmi = has_above ? above_mbmi : left_mbmi;
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if (!has_second_ref(edge_mbmi))
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// edge does not use comp pred (0/1)
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ctx = IS_BACKWARD_REF_FRAME(edge_mbmi->ref_frame[0]);
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else
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// edge uses comp pred (3)
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ctx = 3;
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} else { // no edges available (1)
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ctx = 1;
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}
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assert(ctx >= 0 && ctx < COMP_INTER_CONTEXTS);
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return ctx;
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}
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#if CONFIG_EXT_REFS
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// TODO(zoeliu): Future work will be conducted to optimize the context design
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// for the coding of the reference frames.
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#define CHECK_LAST_OR_LAST2(ref_frame) \
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((ref_frame == LAST_FRAME) || (ref_frame == LAST2_FRAME))
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#define CHECK_GOLDEN_OR_LAST3(ref_frame) \
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((ref_frame == GOLDEN_FRAME) || (ref_frame == LAST3_FRAME))
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// Returns a context number for the given MB prediction signal
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// Signal the first reference frame for a compound mode be either
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// GOLDEN/LAST3, or LAST/LAST2.
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//
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// NOTE(zoeliu): The probability of ref_frame[0] is either
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// GOLDEN_FRAME or LAST3_FRAME.
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int av1_get_pred_context_comp_ref_p(const AV1_COMMON *cm,
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const MACROBLOCKD *xd) {
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int pred_context;
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const MB_MODE_INFO *const above_mbmi = xd->above_mbmi;
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const MB_MODE_INFO *const left_mbmi = xd->left_mbmi;
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const int above_in_image = xd->up_available;
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const int left_in_image = xd->left_available;
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// Note:
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// The mode info data structure has a one element border above and to the
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// left of the entries correpsonding to real macroblocks.
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// The prediction flags in these dummy entries are initialised to 0.
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const int bwd_ref_sign_idx = cm->ref_frame_sign_bias[cm->comp_bwd_ref[0]];
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const int fwd_ref_sign_idx = !bwd_ref_sign_idx;
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if (above_in_image && left_in_image) { // both edges available
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const int above_intra = !is_inter_block(above_mbmi);
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const int left_intra = !is_inter_block(left_mbmi);
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if (above_intra && left_intra) { // intra/intra (2)
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pred_context = 2;
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} else if (above_intra || left_intra) { // intra/inter
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const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi;
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if (!has_second_ref(edge_mbmi)) // single pred (1/3)
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pred_context =
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1 + 2 * (!CHECK_GOLDEN_OR_LAST3(edge_mbmi->ref_frame[0]));
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else // comp pred (1/3)
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pred_context = 1 +
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2 * (!CHECK_GOLDEN_OR_LAST3(
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edge_mbmi->ref_frame[fwd_ref_sign_idx]));
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} else { // inter/inter
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const int l_sg = !has_second_ref(left_mbmi);
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const int a_sg = !has_second_ref(above_mbmi);
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const MV_REFERENCE_FRAME frfa =
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a_sg ? above_mbmi->ref_frame[0]
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: above_mbmi->ref_frame[fwd_ref_sign_idx];
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const MV_REFERENCE_FRAME frfl =
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l_sg ? left_mbmi->ref_frame[0]
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: left_mbmi->ref_frame[fwd_ref_sign_idx];
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if (frfa == frfl && CHECK_GOLDEN_OR_LAST3(frfa)) {
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pred_context = 0;
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} else if (l_sg && a_sg) { // single/single
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if ((CHECK_BACKWARD_REFS(frfa) && CHECK_LAST_OR_LAST2(frfl)) ||
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(CHECK_BACKWARD_REFS(frfl) && CHECK_LAST_OR_LAST2(frfa))) {
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pred_context = 4;
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} else if (CHECK_GOLDEN_OR_LAST3(frfa) || CHECK_GOLDEN_OR_LAST3(frfl)) {
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pred_context = 1;
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} else {
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pred_context = 3;
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}
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} else if (l_sg || a_sg) { // single/comp
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const MV_REFERENCE_FRAME frfc = l_sg ? frfa : frfl;
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const MV_REFERENCE_FRAME rfs = a_sg ? frfa : frfl;
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if (CHECK_GOLDEN_OR_LAST3(frfc) && !CHECK_GOLDEN_OR_LAST3(rfs))
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pred_context = 1;
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else if (CHECK_GOLDEN_OR_LAST3(rfs) && !CHECK_GOLDEN_OR_LAST3(frfc))
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pred_context = 2;
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else
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pred_context = 4;
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} else { // comp/comp
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if ((CHECK_LAST_OR_LAST2(frfa) && CHECK_LAST_OR_LAST2(frfl))) {
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pred_context = 4;
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} else {
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// NOTE(zoeliu): Following assert may be removed once confirmed.
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assert(CHECK_GOLDEN_OR_LAST3(frfa) || CHECK_GOLDEN_OR_LAST3(frfl));
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pred_context = 2;
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}
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}
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}
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} else if (above_in_image || left_in_image) { // one edge available
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const MB_MODE_INFO *edge_mbmi = above_in_image ? above_mbmi : left_mbmi;
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if (!is_inter_block(edge_mbmi)) {
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pred_context = 2;
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} else {
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if (has_second_ref(edge_mbmi))
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pred_context =
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4 *
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(!CHECK_GOLDEN_OR_LAST3(edge_mbmi->ref_frame[fwd_ref_sign_idx]));
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else
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pred_context = 3 * (!CHECK_GOLDEN_OR_LAST3(edge_mbmi->ref_frame[0]));
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}
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} else { // no edges available (2)
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pred_context = 2;
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}
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assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
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return pred_context;
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}
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// Returns a context number for the given MB prediction signal
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// Signal the first reference frame for a compound mode be LAST,
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// conditioning on that it is known either LAST/LAST2.
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//
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// NOTE(zoeliu): The probability of ref_frame[0] is LAST_FRAME,
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// conditioning on it is either LAST_FRAME or LAST2_FRAME.
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int av1_get_pred_context_comp_ref_p1(const AV1_COMMON *cm,
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const MACROBLOCKD *xd) {
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int pred_context;
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const MB_MODE_INFO *const above_mbmi = xd->above_mbmi;
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const MB_MODE_INFO *const left_mbmi = xd->left_mbmi;
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const int above_in_image = xd->up_available;
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const int left_in_image = xd->left_available;
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// Note:
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// The mode info data structure has a one element border above and to the
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// left of the entries correpsonding to real macroblocks.
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// The prediction flags in these dummy entries are initialised to 0.
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const int bwd_ref_sign_idx = cm->ref_frame_sign_bias[cm->comp_bwd_ref[0]];
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const int fwd_ref_sign_idx = !bwd_ref_sign_idx;
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if (above_in_image && left_in_image) { // both edges available
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const int above_intra = !is_inter_block(above_mbmi);
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const int left_intra = !is_inter_block(left_mbmi);
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if (above_intra && left_intra) { // intra/intra (2)
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pred_context = 2;
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} else if (above_intra || left_intra) { // intra/inter
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const MB_MODE_INFO *edge_mbmi = above_intra ? left_mbmi : above_mbmi;
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if (!has_second_ref(edge_mbmi)) // single pred (1/3)
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pred_context = 1 + 2 * (edge_mbmi->ref_frame[0] != LAST_FRAME);
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else // comp pred (1/3)
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pred_context =
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1 + 2 * (edge_mbmi->ref_frame[fwd_ref_sign_idx] != LAST_FRAME);
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} else { // inter/inter
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const int l_sg = !has_second_ref(left_mbmi);
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const int a_sg = !has_second_ref(above_mbmi);
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const MV_REFERENCE_FRAME frfa =
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a_sg ? above_mbmi->ref_frame[0]
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: above_mbmi->ref_frame[fwd_ref_sign_idx];
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const MV_REFERENCE_FRAME frfl =
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l_sg ? left_mbmi->ref_frame[0]
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: left_mbmi->ref_frame[fwd_ref_sign_idx];
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if (frfa == frfl && frfa == LAST_FRAME)
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pred_context = 0;
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else if (l_sg && a_sg) { // single/single
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if (frfa == LAST_FRAME || frfl == LAST_FRAME)
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pred_context = 1;
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else if (CHECK_GOLDEN_OR_LAST3(frfa) || CHECK_GOLDEN_OR_LAST3(frfl))
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pred_context = 2 + (frfa != frfl);
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else if (frfa == frfl ||
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(CHECK_BACKWARD_REFS(frfa) && CHECK_BACKWARD_REFS(frfl)))
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pred_context = 3;
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else
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pred_context = 4;
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} else if (l_sg || a_sg) { // single/comp
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const MV_REFERENCE_FRAME frfc = l_sg ? frfa : frfl;
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const MV_REFERENCE_FRAME rfs = a_sg ? frfa : frfl;
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if (frfc == LAST_FRAME && rfs != LAST_FRAME)
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pred_context = 1;
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else if (rfs == LAST_FRAME && frfc != LAST_FRAME)
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pred_context = 2;
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else
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pred_context =
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3 + (frfc == LAST2_FRAME || CHECK_GOLDEN_OR_LAST3(rfs));
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} else { // comp/comp
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if (frfa == LAST_FRAME || frfl == LAST_FRAME)
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pred_context = 2;
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else
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pred_context =
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3 + (CHECK_GOLDEN_OR_LAST3(frfa) || CHECK_GOLDEN_OR_LAST3(frfl));
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}
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}
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} else if (above_in_image || left_in_image) { // one edge available
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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[fwd_ref_sign_idx] != LAST_FRAME);
|
|
} else {
|
|
if (edge_mbmi->ref_frame[0] == LAST_FRAME)
|
|
pred_context = 0;
|
|
else
|
|
pred_context = 2 + CHECK_GOLDEN_OR_LAST3(edge_mbmi->ref_frame[0]);
|
|
}
|
|
}
|
|
} else { // no edges available (2)
|
|
pred_context = 2;
|
|
}
|
|
|
|
assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
|
|
|
|
return pred_context;
|
|
}
|
|
|
|
// Returns a context number for the given MB prediction signal
|
|
// Signal the first reference frame for a compound mode be GOLDEN,
|
|
// conditioning on that it is known either GOLDEN or LAST3.
|
|
//
|
|
// NOTE(zoeliu): The probability of ref_frame[0] is GOLDEN_FRAME,
|
|
// conditioning on it is either GOLDEN or LAST3.
|
|
int av1_get_pred_context_comp_ref_p2(const AV1_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 bwd_ref_sign_idx = cm->ref_frame_sign_bias[cm->comp_bwd_ref[0]];
|
|
const int fwd_ref_sign_idx = !bwd_ref_sign_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] != GOLDEN_FRAME);
|
|
else // comp pred (1/3)
|
|
pred_context =
|
|
1 + 2 * (edge_mbmi->ref_frame[fwd_ref_sign_idx] != GOLDEN_FRAME);
|
|
} 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 frfa =
|
|
a_sg ? above_mbmi->ref_frame[0]
|
|
: above_mbmi->ref_frame[fwd_ref_sign_idx];
|
|
const MV_REFERENCE_FRAME frfl =
|
|
l_sg ? left_mbmi->ref_frame[0]
|
|
: left_mbmi->ref_frame[fwd_ref_sign_idx];
|
|
|
|
if (frfa == frfl && frfa == GOLDEN_FRAME)
|
|
pred_context = 0;
|
|
else if (l_sg && a_sg) { // single/single
|
|
if (frfa == GOLDEN_FRAME || frfl == GOLDEN_FRAME)
|
|
pred_context = 1;
|
|
else if (CHECK_LAST_OR_LAST2(frfa) || CHECK_LAST_OR_LAST2(frfl))
|
|
pred_context = 2 + (frfa != frfl);
|
|
else if (frfa == frfl ||
|
|
(CHECK_BACKWARD_REFS(frfa) && CHECK_BACKWARD_REFS(frfl)))
|
|
pred_context = 3;
|
|
else
|
|
pred_context = 4;
|
|
} else if (l_sg || a_sg) { // single/comp
|
|
const MV_REFERENCE_FRAME frfc = l_sg ? frfa : frfl;
|
|
const MV_REFERENCE_FRAME rfs = a_sg ? frfa : frfl;
|
|
|
|
if (frfc == GOLDEN_FRAME && rfs != GOLDEN_FRAME)
|
|
pred_context = 1;
|
|
else if (rfs == GOLDEN_FRAME && frfc != GOLDEN_FRAME)
|
|
pred_context = 2;
|
|
else
|
|
pred_context = 3 + (frfc == LAST3_FRAME || CHECK_LAST_OR_LAST2(rfs));
|
|
} else { // comp/comp
|
|
if (frfa == GOLDEN_FRAME || frfl == GOLDEN_FRAME)
|
|
pred_context = 2;
|
|
else
|
|
pred_context =
|
|
3 + (CHECK_LAST_OR_LAST2(frfa) || CHECK_LAST_OR_LAST2(frfl));
|
|
}
|
|
}
|
|
} 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[fwd_ref_sign_idx] != GOLDEN_FRAME);
|
|
} else {
|
|
if (edge_mbmi->ref_frame[0] == GOLDEN_FRAME)
|
|
pred_context = 0;
|
|
else
|
|
pred_context = 2 + CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[0]);
|
|
}
|
|
}
|
|
} else { // no edges available (2)
|
|
pred_context = 2;
|
|
}
|
|
|
|
assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
|
|
|
|
return pred_context;
|
|
}
|
|
|
|
// Returns a context number for the given MB prediction signal
|
|
int av1_get_pred_context_comp_bwdref_p(const AV1_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 corresponding to real macroblocks.
|
|
// The prediction flags in these dummy entries are initialized to 0.
|
|
const int bwd_ref_sign_idx = cm->ref_frame_sign_bias[cm->comp_bwd_ref[0]];
|
|
const int fwd_ref_sign_idx = !bwd_ref_sign_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_bwd_ref[1]);
|
|
else // comp pred (1/3)
|
|
pred_context =
|
|
1 +
|
|
2 * (edge_mbmi->ref_frame[bwd_ref_sign_idx] != cm->comp_bwd_ref[1]);
|
|
} else { // inter/inter
|
|
const int l_comp = has_second_ref(left_mbmi);
|
|
const int a_comp = has_second_ref(above_mbmi);
|
|
|
|
const MV_REFERENCE_FRAME l_brf =
|
|
l_comp ? left_mbmi->ref_frame[bwd_ref_sign_idx] : NONE;
|
|
const MV_REFERENCE_FRAME a_brf =
|
|
a_comp ? above_mbmi->ref_frame[bwd_ref_sign_idx] : NONE;
|
|
|
|
const MV_REFERENCE_FRAME l_frf =
|
|
!l_comp ? left_mbmi->ref_frame[0]
|
|
: left_mbmi->ref_frame[fwd_ref_sign_idx];
|
|
const MV_REFERENCE_FRAME a_frf =
|
|
!a_comp ? above_mbmi->ref_frame[0]
|
|
: above_mbmi->ref_frame[fwd_ref_sign_idx];
|
|
|
|
if (l_comp && a_comp) { // comp/comp
|
|
if (l_brf == a_brf && l_brf == cm->comp_bwd_ref[1]) {
|
|
pred_context = 0;
|
|
} else if (l_brf == cm->comp_bwd_ref[1] ||
|
|
a_brf == cm->comp_bwd_ref[1]) {
|
|
pred_context = 1;
|
|
} else {
|
|
// NOTE: Backward ref should be either BWDREF or ALTREF.
|
|
assert(l_brf == a_brf && l_brf != cm->comp_bwd_ref[1]);
|
|
pred_context = 3;
|
|
}
|
|
} else if (!l_comp && !a_comp) { // single/single
|
|
if (l_frf == a_frf && l_frf == cm->comp_bwd_ref[1]) {
|
|
pred_context = 0;
|
|
} else if (l_frf == cm->comp_bwd_ref[1] ||
|
|
a_frf == cm->comp_bwd_ref[1]) {
|
|
pred_context = 1;
|
|
} else if (l_frf == a_frf) {
|
|
pred_context = 3;
|
|
} else {
|
|
assert(l_frf != a_frf && l_frf != cm->comp_bwd_ref[1] &&
|
|
a_frf != cm->comp_bwd_ref[1]);
|
|
pred_context = 4;
|
|
}
|
|
} else { // comp/single
|
|
assert((l_comp && !a_comp) || (!l_comp && a_comp));
|
|
|
|
if ((l_comp && l_brf == cm->comp_bwd_ref[1] &&
|
|
a_frf == cm->comp_bwd_ref[1]) ||
|
|
(a_comp && a_brf == cm->comp_bwd_ref[1] &&
|
|
l_frf == cm->comp_bwd_ref[1])) {
|
|
pred_context = 1;
|
|
} else if ((l_comp && l_brf == cm->comp_bwd_ref[1]) ||
|
|
(a_comp && a_brf == cm->comp_bwd_ref[1]) ||
|
|
(!l_comp && l_frf == cm->comp_bwd_ref[1]) ||
|
|
(!a_comp && a_frf == cm->comp_bwd_ref[1])) {
|
|
pred_context = 2;
|
|
} else {
|
|
pred_context = 4;
|
|
}
|
|
}
|
|
}
|
|
} 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[bwd_ref_sign_idx] != cm->comp_bwd_ref[1]);
|
|
} else {
|
|
pred_context = 3 * (edge_mbmi->ref_frame[0] != cm->comp_bwd_ref[1]);
|
|
}
|
|
}
|
|
} else { // no edges available (2)
|
|
pred_context = 2;
|
|
}
|
|
assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
|
|
|
|
return pred_context;
|
|
}
|
|
|
|
#else // CONFIG_EXT_REFS
|
|
|
|
// Returns a context number for the given MB prediction signal
|
|
int av1_get_pred_context_comp_ref_p(const AV1_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 corresponding to real macroblocks.
|
|
// The prediction flags in these dummy entries are initialized 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;
|
|
}
|
|
|
|
#endif // CONFIG_EXT_REFS
|
|
|
|
#if CONFIG_EXT_REFS
|
|
|
|
// For the bit to signal whether the single reference is a ALTREF_FRAME
|
|
// or a BWDREF_FRAME.
|
|
//
|
|
// NOTE(zoeliu): The probability of ref_frame[0] is ALTREF/BWDREF.
|
|
int av1_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)) // single
|
|
pred_context = 4 * (!CHECK_BACKWARD_REFS(edge_mbmi->ref_frame[0]));
|
|
else // comp
|
|
pred_context = 2;
|
|
} 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 left0 = left_mbmi->ref_frame[0];
|
|
|
|
if (above_has_second && left_has_second) { // comp/comp
|
|
pred_context = 2;
|
|
} else if (above_has_second || left_has_second) { // single/comp
|
|
const MV_REFERENCE_FRAME rfs = !above_has_second ? above0 : left0;
|
|
|
|
pred_context = (!CHECK_BACKWARD_REFS(rfs)) ? 4 : 1;
|
|
} else { // single/single
|
|
pred_context = 2 * (!CHECK_BACKWARD_REFS(above0)) +
|
|
2 * (!CHECK_BACKWARD_REFS(left0));
|
|
}
|
|
}
|
|
} 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)) // single
|
|
pred_context = 4 * (!CHECK_BACKWARD_REFS(edge_mbmi->ref_frame[0]));
|
|
else // comp
|
|
pred_context = 2;
|
|
}
|
|
} else { // no edges available
|
|
pred_context = 2;
|
|
}
|
|
|
|
assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
|
|
return pred_context;
|
|
}
|
|
|
|
// For the bit to signal whether the single reference is ALTREF_FRAME or
|
|
// BWDREF_FRAME, knowing that it shall be either of these 2 choices.
|
|
//
|
|
// NOTE(zoeliu): The probability of ref_frame[0] is ALTREF_FRAME, conditioning
|
|
// on it is either ALTREF_FRAME/BWDREF_FRAME.
|
|
int av1_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)) { // single
|
|
if (!CHECK_BACKWARD_REFS(edge_mbmi->ref_frame[0]))
|
|
pred_context = 3;
|
|
else
|
|
pred_context = 4 * (edge_mbmi->ref_frame[0] == BWDREF_FRAME);
|
|
} else { // comp
|
|
pred_context = 1 +
|
|
2 * (edge_mbmi->ref_frame[0] == BWDREF_FRAME ||
|
|
edge_mbmi->ref_frame[1] == BWDREF_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) { // comp/comp
|
|
if (above0 == left0 && above1 == left1)
|
|
pred_context =
|
|
3 * (above0 == BWDREF_FRAME || above1 == BWDREF_FRAME ||
|
|
left0 == BWDREF_FRAME || left1 == BWDREF_FRAME);
|
|
else
|
|
pred_context = 2;
|
|
} else if (above_has_second || left_has_second) { // single/comp
|
|
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 == BWDREF_FRAME)
|
|
pred_context = 3 + (crf1 == BWDREF_FRAME || crf2 == BWDREF_FRAME);
|
|
else if (rfs == ALTREF_FRAME)
|
|
pred_context = (crf1 == BWDREF_FRAME || crf2 == BWDREF_FRAME);
|
|
else
|
|
pred_context = 1 + 2 * (crf1 == BWDREF_FRAME || crf2 == BWDREF_FRAME);
|
|
} else { // single/single
|
|
if (!CHECK_BACKWARD_REFS(above0) && !CHECK_BACKWARD_REFS(left0)) {
|
|
pred_context = 2 + (above0 == left0);
|
|
} else if (!CHECK_BACKWARD_REFS(above0) ||
|
|
!CHECK_BACKWARD_REFS(left0)) {
|
|
const MV_REFERENCE_FRAME edge0 =
|
|
!CHECK_BACKWARD_REFS(above0) ? left0 : above0;
|
|
pred_context = 4 * (edge0 == BWDREF_FRAME);
|
|
} else {
|
|
pred_context =
|
|
2 * (above0 == BWDREF_FRAME) + 2 * (left0 == BWDREF_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) ||
|
|
(!CHECK_BACKWARD_REFS(edge_mbmi->ref_frame[0]) &&
|
|
!has_second_ref(edge_mbmi)))
|
|
pred_context = 2;
|
|
else if (!has_second_ref(edge_mbmi)) // single
|
|
pred_context = 4 * (edge_mbmi->ref_frame[0] == BWDREF_FRAME);
|
|
else // comp
|
|
pred_context = 3 * (edge_mbmi->ref_frame[0] == BWDREF_FRAME ||
|
|
edge_mbmi->ref_frame[1] == BWDREF_FRAME);
|
|
} else { // no edges available (2)
|
|
pred_context = 2;
|
|
}
|
|
|
|
assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
|
|
return pred_context;
|
|
}
|
|
|
|
// For the bit to signal whether the single reference is LAST3/GOLDEN or
|
|
// LAST2/LAST, knowing that it shall be either of these 2 choices.
|
|
//
|
|
// NOTE(zoeliu): The probability of ref_frame[0] is LAST3/GOLDEN, conditioning
|
|
// on it is either LAST3/GOLDEN/LAST2/LAST.
|
|
int av1_get_pred_context_single_ref_p3(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)) { // single
|
|
if (CHECK_BACKWARD_REFS(edge_mbmi->ref_frame[0]))
|
|
pred_context = 3;
|
|
else
|
|
pred_context = 4 * CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[0]);
|
|
} else { // comp
|
|
pred_context = 1 +
|
|
2 * (CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[0]) ||
|
|
CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[1]));
|
|
}
|
|
} 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) { // comp/comp
|
|
if (above0 == left0 && above1 == left1)
|
|
pred_context =
|
|
3 * (CHECK_LAST_OR_LAST2(above0) || CHECK_LAST_OR_LAST2(above1) ||
|
|
CHECK_LAST_OR_LAST2(left0) || CHECK_LAST_OR_LAST2(left1));
|
|
else
|
|
pred_context = 2;
|
|
} else if (above_has_second || left_has_second) { // single/comp
|
|
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 (CHECK_LAST_OR_LAST2(rfs))
|
|
pred_context =
|
|
3 + (CHECK_LAST_OR_LAST2(crf1) || CHECK_LAST_OR_LAST2(crf2));
|
|
else if (CHECK_GOLDEN_OR_LAST3(rfs))
|
|
pred_context =
|
|
(CHECK_LAST_OR_LAST2(crf1) || CHECK_LAST_OR_LAST2(crf2));
|
|
else
|
|
pred_context =
|
|
1 + 2 * (CHECK_LAST_OR_LAST2(crf1) || CHECK_LAST_OR_LAST2(crf2));
|
|
} else { // single/single
|
|
if (CHECK_BACKWARD_REFS(above0) && CHECK_BACKWARD_REFS(left0)) {
|
|
pred_context = 2 + (above0 == left0);
|
|
} else if (CHECK_BACKWARD_REFS(above0) || CHECK_BACKWARD_REFS(left0)) {
|
|
const MV_REFERENCE_FRAME edge0 =
|
|
CHECK_BACKWARD_REFS(above0) ? left0 : above0;
|
|
pred_context = 4 * CHECK_LAST_OR_LAST2(edge0);
|
|
} else {
|
|
pred_context =
|
|
2 * CHECK_LAST_OR_LAST2(above0) + 2 * CHECK_LAST_OR_LAST2(left0);
|
|
}
|
|
}
|
|
}
|
|
} 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) ||
|
|
(CHECK_BACKWARD_REFS(edge_mbmi->ref_frame[0]) &&
|
|
!has_second_ref(edge_mbmi)))
|
|
pred_context = 2;
|
|
else if (!has_second_ref(edge_mbmi)) // single
|
|
pred_context = 4 * (CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[0]));
|
|
else // comp
|
|
pred_context = 3 * (CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[0]) ||
|
|
CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[1]));
|
|
} else { // no edges available (2)
|
|
pred_context = 2;
|
|
}
|
|
|
|
assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
|
|
return pred_context;
|
|
}
|
|
|
|
// For the bit to signal whether the single reference is LAST2_FRAME or
|
|
// LAST_FRAME, knowing that it shall be either of these 2 choices.
|
|
//
|
|
// NOTE(zoeliu): The probability of ref_frame[0] is LAST2_FRAME, conditioning
|
|
// on it is either LAST2_FRAME/LAST_FRAME.
|
|
int av1_get_pred_context_single_ref_p4(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)) { // single
|
|
if (!CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[0]))
|
|
pred_context = 3;
|
|
else
|
|
pred_context = 4 * (edge_mbmi->ref_frame[0] == LAST_FRAME);
|
|
} else { // comp
|
|
pred_context = 1 +
|
|
2 * (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) { // comp/comp
|
|
if (above0 == left0 && above1 == left1)
|
|
pred_context = 3 * (above0 == LAST_FRAME || above1 == LAST_FRAME ||
|
|
left0 == LAST_FRAME || left1 == LAST_FRAME);
|
|
else
|
|
pred_context = 2;
|
|
} else if (above_has_second || left_has_second) { // single/comp
|
|
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 if (rfs == LAST2_FRAME)
|
|
pred_context = (crf1 == LAST_FRAME || crf2 == LAST_FRAME);
|
|
else
|
|
pred_context = 1 + 2 * (crf1 == LAST_FRAME || crf2 == LAST_FRAME);
|
|
} else { // single/single
|
|
if (!CHECK_LAST_OR_LAST2(above0) && !CHECK_LAST_OR_LAST2(left0)) {
|
|
pred_context = 2 + (above0 == left0);
|
|
} else if (!CHECK_LAST_OR_LAST2(above0) ||
|
|
!CHECK_LAST_OR_LAST2(left0)) {
|
|
const MV_REFERENCE_FRAME edge0 =
|
|
!CHECK_LAST_OR_LAST2(above0) ? left0 : above0;
|
|
pred_context = 4 * (edge0 == 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) ||
|
|
(!CHECK_LAST_OR_LAST2(edge_mbmi->ref_frame[0]) &&
|
|
!has_second_ref(edge_mbmi)))
|
|
pred_context = 2;
|
|
else if (!has_second_ref(edge_mbmi)) // single
|
|
pred_context = 4 * (edge_mbmi->ref_frame[0] == LAST_FRAME);
|
|
else // comp
|
|
pred_context = 3 * (edge_mbmi->ref_frame[0] == LAST_FRAME ||
|
|
edge_mbmi->ref_frame[1] == LAST_FRAME);
|
|
} else { // no edges available (2)
|
|
pred_context = 2;
|
|
}
|
|
|
|
assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
|
|
return pred_context;
|
|
}
|
|
|
|
// For the bit to signal whether the single reference is GOLDEN_FRAME or
|
|
// LAST3_FRAME, knowing that it shall be either of these 2 choices.
|
|
//
|
|
// NOTE(zoeliu): The probability of ref_frame[0] is GOLDEN_FRAME, conditioning
|
|
// on it is either GOLDEN_FRAME/LAST3_FRAME.
|
|
int av1_get_pred_context_single_ref_p5(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)) { // single
|
|
if (!CHECK_GOLDEN_OR_LAST3(edge_mbmi->ref_frame[0]))
|
|
pred_context = 3;
|
|
else
|
|
pred_context = 4 * (edge_mbmi->ref_frame[0] == LAST3_FRAME);
|
|
} else { // comp
|
|
pred_context = 1 +
|
|
2 * (edge_mbmi->ref_frame[0] == LAST3_FRAME ||
|
|
edge_mbmi->ref_frame[1] == LAST3_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) { // comp/comp
|
|
if (above0 == left0 && above1 == left1)
|
|
pred_context = 3 * (above0 == LAST3_FRAME || above1 == LAST3_FRAME ||
|
|
left0 == LAST3_FRAME || left1 == LAST3_FRAME);
|
|
else
|
|
pred_context = 2;
|
|
} else if (above_has_second || left_has_second) { // single/comp
|
|
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 == LAST3_FRAME)
|
|
pred_context = 3 + (crf1 == LAST3_FRAME || crf2 == LAST3_FRAME);
|
|
else if (rfs == GOLDEN_FRAME)
|
|
pred_context = (crf1 == LAST3_FRAME || crf2 == LAST3_FRAME);
|
|
else
|
|
pred_context = 1 + 2 * (crf1 == LAST3_FRAME || crf2 == LAST3_FRAME);
|
|
} else { // single/single
|
|
if (!CHECK_GOLDEN_OR_LAST3(above0) && !CHECK_GOLDEN_OR_LAST3(left0)) {
|
|
pred_context = 2 + (above0 == left0);
|
|
} else if (!CHECK_GOLDEN_OR_LAST3(above0) ||
|
|
!CHECK_GOLDEN_OR_LAST3(left0)) {
|
|
const MV_REFERENCE_FRAME edge0 =
|
|
!CHECK_GOLDEN_OR_LAST3(above0) ? left0 : above0;
|
|
pred_context = 4 * (edge0 == LAST3_FRAME);
|
|
} else {
|
|
pred_context =
|
|
2 * (above0 == LAST3_FRAME) + 2 * (left0 == LAST3_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) ||
|
|
(!CHECK_GOLDEN_OR_LAST3(edge_mbmi->ref_frame[0]) &&
|
|
!has_second_ref(edge_mbmi)))
|
|
pred_context = 2;
|
|
else if (!has_second_ref(edge_mbmi)) // single
|
|
pred_context = 4 * (edge_mbmi->ref_frame[0] == LAST3_FRAME);
|
|
else // comp
|
|
pred_context = 3 * (edge_mbmi->ref_frame[0] == LAST3_FRAME ||
|
|
edge_mbmi->ref_frame[1] == LAST3_FRAME);
|
|
} else { // no edges available (2)
|
|
pred_context = 2;
|
|
}
|
|
|
|
assert(pred_context >= 0 && pred_context < REF_CONTEXTS);
|
|
return pred_context;
|
|
}
|
|
|
|
#else // CONFIG_EXT_REFS
|
|
|
|
int av1_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 corresponding to real macroblocks.
|
|
// The prediction flags in these dummy entries are initialized 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);
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const MV_REFERENCE_FRAME above0 = above_mbmi->ref_frame[0];
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const MV_REFERENCE_FRAME above1 = above_mbmi->ref_frame[1];
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const MV_REFERENCE_FRAME left0 = left_mbmi->ref_frame[0];
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const MV_REFERENCE_FRAME left1 = left_mbmi->ref_frame[1];
|
|
|
|
if (above_has_second && left_has_second) {
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|
pred_context = 1 + (above0 == LAST_FRAME || above1 == LAST_FRAME ||
|
|
left0 == LAST_FRAME || left1 == LAST_FRAME);
|
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} else if (above_has_second || left_has_second) {
|
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const MV_REFERENCE_FRAME rfs = !above_has_second ? above0 : left0;
|
|
const MV_REFERENCE_FRAME crf1 = above_has_second ? above0 : left0;
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const MV_REFERENCE_FRAME crf2 = above_has_second ? above1 : left1;
|
|
|
|
if (rfs == LAST_FRAME)
|
|
pred_context = 3 + (crf1 == LAST_FRAME || crf2 == LAST_FRAME);
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|
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 av1_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 corresponding to real macroblocks.
|
|
// The prediction flags in these dummy entries are initialized 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 != GOLDEN_FRAME && rfs != LAST_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;
|
|
}
|
|
|
|
#endif // CONFIG_EXT_REFS
|