pred_common.c | Explore in Territory

/*
 * Copyright (c) 2016, Alliance for Open Media. All rights reserved.
 *
 * This source code is subject to the terms of the BSD 2 Clause License and
 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
 * was not distributed with this source code in the LICENSE file, you can
 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
 * Media Patent License 1.0 was not distributed with this source code in the
 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
 */

#include "av1/common/common.h"
#include "av1/common/pred_common.h"
#include "av1/common/reconinter.h"
#include "av1/common/reconintra.h"
#include "av1/common/seg_common.h"

// Returns a context number for the given MB prediction signal
static InterpFilter get_ref_filter_type(const MB_MODE_INFO *ref_mbmi,
                                        const MACROBLOCKD *xd, int dir,
                                        MV_REFERENCE_FRAME ref_frame) { … }

int av1_get_pred_context_switchable_interp(const MACROBLOCKD *xd, int dir) { … }

static void palette_add_to_cache(uint16_t *cache, int *n, uint16_t val) { … }

int av1_get_palette_cache(const MACROBLOCKD *const xd, int plane,
                          uint16_t *cache) { … }

// 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 av1_get_intra_inter_context(const MACROBLOCKD *xd) { … }

#define CHECK_BACKWARD_REFS(ref_frame) …
#define IS_BACKWARD_REF_FRAME(ref_frame) …

int av1_get_reference_mode_context(const MACROBLOCKD *xd) { … }

int av1_get_comp_reference_type_context(const MACROBLOCKD *xd) { … }

// Returns a context number for the given MB prediction signal
//
// Signal the uni-directional compound reference frame pair as either
// (BWDREF, ALTREF), or (LAST, LAST2) / (LAST, LAST3) / (LAST, GOLDEN),
// conditioning on the pair is known as uni-directional.
//
// 3 contexts: Voting is used to compare the count of forward references with
//             that of backward references from the spatial neighbors.
int av1_get_pred_context_uni_comp_ref_p(const MACROBLOCKD *xd) { … }

// Returns a context number for the given MB prediction signal
//
// Signal the uni-directional compound reference frame pair as
// either (LAST, LAST2), or (LAST, LAST3) / (LAST, GOLDEN),
// conditioning on the pair is known as one of the above three.
//
// 3 contexts: Voting is used to compare the count of LAST2_FRAME with the
//             total count of LAST3/GOLDEN from the spatial neighbors.
int av1_get_pred_context_uni_comp_ref_p1(const MACROBLOCKD *xd) { … }

// Returns a context number for the given MB prediction signal
//
// Signal the uni-directional compound reference frame pair as
// either (LAST, LAST3) or (LAST, GOLDEN),
// conditioning on the pair is known as one of the above two.
//
// 3 contexts: Voting is used to compare the count of LAST3_FRAME with the
//             total count of GOLDEN_FRAME from the spatial neighbors.
int av1_get_pred_context_uni_comp_ref_p2(const MACROBLOCKD *xd) { … }

// == Common context functions for both comp and single ref ==
//
// Obtain contexts to signal a reference frame to be either LAST/LAST2 or
// LAST3/GOLDEN.
static int get_pred_context_ll2_or_l3gld(const MACROBLOCKD *xd) { … }

// Obtain contexts to signal a reference frame to be either LAST or LAST2.
static int get_pred_context_last_or_last2(const MACROBLOCKD *xd) { … }

// Obtain contexts to signal a reference frame to be either LAST3 or GOLDEN.
static int get_pred_context_last3_or_gld(const MACROBLOCKD *xd) { … }

// Obtain contexts to signal a reference frame be either BWDREF/ALTREF2, or
// ALTREF.
static int get_pred_context_brfarf2_or_arf(const MACROBLOCKD *xd) { … }

// Obtain contexts to signal a reference frame be either BWDREF or ALTREF2.
static int get_pred_context_brf_or_arf2(const MACROBLOCKD *xd) { … }

// == Context functions for comp ref ==
//
// Returns a context number for the given MB prediction signal
// Signal the first reference frame for a compound mode be either
// GOLDEN/LAST3, or LAST/LAST2.
int av1_get_pred_context_comp_ref_p(const MACROBLOCKD *xd) { … }

// Returns a context number for the given MB prediction signal
// Signal the first reference frame for a compound mode be LAST,
// conditioning on that it is known either LAST/LAST2.
int av1_get_pred_context_comp_ref_p1(const MACROBLOCKD *xd) { … }

// 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.
int av1_get_pred_context_comp_ref_p2(const MACROBLOCKD *xd) { … }

// Signal the 2nd reference frame for a compound mode be either
// ALTREF, or ALTREF2/BWDREF.
int av1_get_pred_context_comp_bwdref_p(const MACROBLOCKD *xd) { … }

// Signal the 2nd reference frame for a compound mode be either
// ALTREF2 or BWDREF.
int av1_get_pred_context_comp_bwdref_p1(const MACROBLOCKD *xd) { … }

// == Context functions for single ref ==
//
// For the bit to signal whether the single reference is a forward reference
// frame or a backward reference frame.
int av1_get_pred_context_single_ref_p1(const MACROBLOCKD *xd) { … }

// For the bit to signal whether the single reference is ALTREF_FRAME or
// non-ALTREF backward reference frame, knowing that it shall be either of
// these 2 choices.
int av1_get_pred_context_single_ref_p2(const MACROBLOCKD *xd) { … }

// 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.
int av1_get_pred_context_single_ref_p3(const MACROBLOCKD *xd) { … }

// 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.
int av1_get_pred_context_single_ref_p4(const MACROBLOCKD *xd) { … }

// 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.
int av1_get_pred_context_single_ref_p5(const MACROBLOCKD *xd) { … }

// For the bit to signal whether the single reference is ALTREF2_FRAME or
// BWDREF_FRAME, knowing that it shall be either of these 2 choices.
int av1_get_pred_context_single_ref_p6(const MACROBLOCKD *xd) { … }
chromium/third_party/libaom/source/libaom/av1/common/pred_common.c
