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/*
* Copyright (c) 2013 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.
*/
#ifndef VP9_COMMON_VP9_SCALE_H_
#define VP9_COMMON_VP9_SCALE_H_
#include "vp9/common/vp9_mv.h"
#include "vp9/common/vp9_convolve.h"
#define VP9_REF_SCALE_SHIFT 14
#define VP9_REF_NO_SCALE (1 << VP9_REF_SCALE_SHIFT)
struct scale_factors {
int x_scale_fp; // horizontal fixed point scale factor
int y_scale_fp; // vertical fixed point scale factor
int x_offset_q4;
int x_step_q4;
int y_offset_q4;
int y_step_q4;
int (*scale_value_x)(int val, const struct scale_factors *scale);
int (*scale_value_y)(int val, const struct scale_factors *scale);
void (*set_scaled_offsets)(struct scale_factors *scale, int row, int col);
MV32 (*scale_mv)(const MV *mv, const struct scale_factors *scale);
convolve_fn_t predict[2][2][2]; // horiz, vert, avg
};
void vp9_setup_scale_factors_for_frame(struct scale_factors *scale,
int other_w, int other_h,
int this_w, int this_h);
#endif // VP9_COMMON_VP9_SCALE_H_
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