chromium/third_party/libaom/source/libaom/av1/common/scale.h

/*
 * 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.
 */

#ifndef AOM_AV1_COMMON_SCALE_H_
#define AOM_AV1_COMMON_SCALE_H_

#include "av1/common/convolve.h"
#include "av1/common/mv.h"

#ifdef __cplusplus
extern "C" {
#endif

#define SCALE_NUMERATOR …

#define REF_SCALE_SHIFT …
#define REF_NO_SCALE …
#define REF_INVALID_SCALE …

struct scale_factors { … };

// Note: Expect val to be in q4 precision
static inline int av1_scaled_x(int val, const struct scale_factors *sf) { … }

// Note: Expect val to be in q4 precision
static inline int av1_scaled_y(int val, const struct scale_factors *sf) { … }

// Note: Expect val to be in q4 precision
static inline int av1_unscaled_value(int val, const struct scale_factors *sf) { … }

MV32 av1_scale_mv(const MV *mv, int x, int y, const struct scale_factors *sf);

void av1_setup_scale_factors_for_frame(struct scale_factors *sf, int other_w,
                                       int other_h, int this_w, int this_h);

static inline int av1_is_valid_scale(const struct scale_factors *sf) { … }

static inline int av1_is_scaled(const struct scale_factors *sf) { … }

// See AV1 spec, Section 6.8.6. Frame size with refs semantics.
static inline int valid_ref_frame_size(int ref_width, int ref_height,
                                       int this_width, int this_height) { … }

#ifdef __cplusplus
}  // extern "C"
#endif

#endif  // AOM_AV1_COMMON_SCALE_H_