1 /*
2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
11
12 #ifndef AV1_COMMON_SCALE_H_
13 #define AV1_COMMON_SCALE_H_
14
15 #include "av1/common/mv.h"
16 #include "aom_dsp/aom_convolve.h"
17
18 #ifdef __cplusplus
19 extern "C" {
20 #endif
21
22 #define SCALE_NUMERATOR 8
23
24 #define REF_SCALE_SHIFT 14
25 #define REF_NO_SCALE (1 << REF_SCALE_SHIFT)
26 #define REF_INVALID_SCALE -1
27
28 struct scale_factors {
29 int x_scale_fp; // horizontal fixed point scale factor
30 int y_scale_fp; // vertical fixed point scale factor
31 int x_step_q4;
32 int y_step_q4;
33
34 int (*scale_value_x)(int val, const struct scale_factors *sf);
35 int (*scale_value_y)(int val, const struct scale_factors *sf);
36
37 convolve_fn_t predict[2][2][2]; // horiz, vert, avg
38 #if CONFIG_HIGHBITDEPTH
39 highbd_convolve_fn_t highbd_predict[2][2][2]; // horiz, vert, avg
40 #endif // CONFIG_HIGHBITDEPTH
41 };
42
43 MV32 av1_scale_mv(const MV *mv, int x, int y, const struct scale_factors *sf);
44
45 #if CONFIG_HIGHBITDEPTH
46 void av1_setup_scale_factors_for_frame(struct scale_factors *sf, int other_w,
47 int other_h, int this_w, int this_h,
48 int use_high);
49 #else
50 void av1_setup_scale_factors_for_frame(struct scale_factors *sf, int other_w,
51 int other_h, int this_w, int this_h);
52 #endif // CONFIG_HIGHBITDEPTH
53
av1_is_valid_scale(const struct scale_factors * sf)54 static INLINE int av1_is_valid_scale(const struct scale_factors *sf) {
55 return sf->x_scale_fp != REF_INVALID_SCALE &&
56 sf->y_scale_fp != REF_INVALID_SCALE;
57 }
58
av1_is_scaled(const struct scale_factors * sf)59 static INLINE int av1_is_scaled(const struct scale_factors *sf) {
60 return av1_is_valid_scale(sf) &&
61 (sf->x_scale_fp != REF_NO_SCALE || sf->y_scale_fp != REF_NO_SCALE);
62 }
63
valid_ref_frame_size(int ref_width,int ref_height,int this_width,int this_height)64 static INLINE int valid_ref_frame_size(int ref_width, int ref_height,
65 int this_width, int this_height) {
66 return 2 * this_width >= ref_width && 2 * this_height >= ref_height &&
67 this_width <= 16 * ref_width && this_height <= 16 * ref_height;
68 }
69
70 #ifdef __cplusplus
71 } // extern "C"
72 #endif
73
74 #endif // AV1_COMMON_SCALE_H_
75