Line data Source code
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 : #include "./aom_dsp_rtcd.h"
13 : #include "av1/common/filter.h"
14 : #include "av1/common/scale.h"
15 : #include "aom_dsp/aom_filter.h"
16 :
17 0 : static INLINE int scaled_x(int val, const struct scale_factors *sf) {
18 0 : return (int)((int64_t)val * sf->x_scale_fp >> REF_SCALE_SHIFT);
19 : }
20 :
21 0 : static INLINE int scaled_y(int val, const struct scale_factors *sf) {
22 0 : return (int)((int64_t)val * sf->y_scale_fp >> REF_SCALE_SHIFT);
23 : }
24 :
25 0 : static int unscaled_value(int val, const struct scale_factors *sf) {
26 : (void)sf;
27 0 : return val;
28 : }
29 :
30 0 : static int get_fixed_point_scale_factor(int other_size, int this_size) {
31 : // Calculate scaling factor once for each reference frame
32 : // and use fixed point scaling factors in decoding and encoding routines.
33 : // Hardware implementations can calculate scale factor in device driver
34 : // and use multiplication and shifting on hardware instead of division.
35 0 : return (other_size << REF_SCALE_SHIFT) / this_size;
36 : }
37 :
38 0 : MV32 av1_scale_mv(const MV *mv, int x, int y, const struct scale_factors *sf) {
39 0 : const int x_off_q4 = scaled_x(x << SUBPEL_BITS, sf) & SUBPEL_MASK;
40 0 : const int y_off_q4 = scaled_y(y << SUBPEL_BITS, sf) & SUBPEL_MASK;
41 0 : const MV32 res = { scaled_y(mv->row, sf) + y_off_q4,
42 0 : scaled_x(mv->col, sf) + x_off_q4 };
43 0 : return res;
44 : }
45 :
46 : #if CONFIG_HIGHBITDEPTH
47 0 : void av1_setup_scale_factors_for_frame(struct scale_factors *sf, int other_w,
48 : int other_h, int this_w, int this_h,
49 : int use_highbd) {
50 : #else
51 : void av1_setup_scale_factors_for_frame(struct scale_factors *sf, int other_w,
52 : int other_h, int this_w, int this_h) {
53 : #endif
54 0 : if (!valid_ref_frame_size(other_w, other_h, this_w, this_h)) {
55 0 : sf->x_scale_fp = REF_INVALID_SCALE;
56 0 : sf->y_scale_fp = REF_INVALID_SCALE;
57 0 : return;
58 : }
59 :
60 0 : sf->x_scale_fp = get_fixed_point_scale_factor(other_w, this_w);
61 0 : sf->y_scale_fp = get_fixed_point_scale_factor(other_h, this_h);
62 0 : sf->x_step_q4 = scaled_x(16, sf);
63 0 : sf->y_step_q4 = scaled_y(16, sf);
64 :
65 0 : if (av1_is_scaled(sf)) {
66 0 : sf->scale_value_x = scaled_x;
67 0 : sf->scale_value_y = scaled_y;
68 : } else {
69 0 : sf->scale_value_x = unscaled_value;
70 0 : sf->scale_value_y = unscaled_value;
71 : }
72 :
73 : // TODO(agrange): Investigate the best choice of functions to use here
74 : // for EIGHTTAP_SMOOTH. Since it is not interpolating, need to choose what
75 : // to do at full-pel offsets. The current selection, where the filter is
76 : // applied in one direction only, and not at all for 0,0, seems to give the
77 : // best quality, but it may be worth trying an additional mode that does
78 : // do the filtering on full-pel.
79 0 : if (sf->x_step_q4 == 16) {
80 0 : if (sf->y_step_q4 == 16) {
81 : // No scaling in either direction.
82 0 : sf->predict[0][0][0] = aom_convolve_copy;
83 0 : sf->predict[0][0][1] = aom_convolve_avg;
84 0 : sf->predict[0][1][0] = aom_convolve8_vert;
85 0 : sf->predict[0][1][1] = aom_convolve8_avg_vert;
86 0 : sf->predict[1][0][0] = aom_convolve8_horiz;
87 0 : sf->predict[1][0][1] = aom_convolve8_avg_horiz;
88 : } else {
89 : // No scaling in x direction. Must always scale in the y direction.
90 0 : sf->predict[0][0][0] = aom_convolve8_vert;
91 0 : sf->predict[0][0][1] = aom_convolve8_avg_vert;
92 0 : sf->predict[0][1][0] = aom_convolve8_vert;
93 0 : sf->predict[0][1][1] = aom_convolve8_avg_vert;
94 0 : sf->predict[1][0][0] = aom_convolve8;
95 0 : sf->predict[1][0][1] = aom_convolve8_avg;
96 : }
97 : } else {
98 0 : if (sf->y_step_q4 == 16) {
99 : // No scaling in the y direction. Must always scale in the x direction.
100 0 : sf->predict[0][0][0] = aom_convolve8_horiz;
101 0 : sf->predict[0][0][1] = aom_convolve8_avg_horiz;
102 0 : sf->predict[0][1][0] = aom_convolve8;
103 0 : sf->predict[0][1][1] = aom_convolve8_avg;
104 0 : sf->predict[1][0][0] = aom_convolve8_horiz;
105 0 : sf->predict[1][0][1] = aom_convolve8_avg_horiz;
106 : } else {
107 : // Must always scale in both directions.
108 0 : sf->predict[0][0][0] = aom_convolve8;
109 0 : sf->predict[0][0][1] = aom_convolve8_avg;
110 0 : sf->predict[0][1][0] = aom_convolve8;
111 0 : sf->predict[0][1][1] = aom_convolve8_avg;
112 0 : sf->predict[1][0][0] = aom_convolve8;
113 0 : sf->predict[1][0][1] = aom_convolve8_avg;
114 : }
115 : }
116 : // 2D subpel motion always gets filtered in both directions
117 0 : sf->predict[1][1][0] = aom_convolve8;
118 0 : sf->predict[1][1][1] = aom_convolve8_avg;
119 :
120 : #if CONFIG_HIGHBITDEPTH
121 0 : if (use_highbd) {
122 0 : if (sf->x_step_q4 == 16) {
123 0 : if (sf->y_step_q4 == 16) {
124 : // No scaling in either direction.
125 0 : sf->highbd_predict[0][0][0] = aom_highbd_convolve_copy;
126 0 : sf->highbd_predict[0][0][1] = aom_highbd_convolve_avg;
127 0 : sf->highbd_predict[0][1][0] = aom_highbd_convolve8_vert;
128 0 : sf->highbd_predict[0][1][1] = aom_highbd_convolve8_avg_vert;
129 0 : sf->highbd_predict[1][0][0] = aom_highbd_convolve8_horiz;
130 0 : sf->highbd_predict[1][0][1] = aom_highbd_convolve8_avg_horiz;
131 : } else {
132 : // No scaling in x direction. Must always scale in the y direction.
133 0 : sf->highbd_predict[0][0][0] = aom_highbd_convolve8_vert;
134 0 : sf->highbd_predict[0][0][1] = aom_highbd_convolve8_avg_vert;
135 0 : sf->highbd_predict[0][1][0] = aom_highbd_convolve8_vert;
136 0 : sf->highbd_predict[0][1][1] = aom_highbd_convolve8_avg_vert;
137 0 : sf->highbd_predict[1][0][0] = aom_highbd_convolve8;
138 0 : sf->highbd_predict[1][0][1] = aom_highbd_convolve8_avg;
139 : }
140 : } else {
141 0 : if (sf->y_step_q4 == 16) {
142 : // No scaling in the y direction. Must always scale in the x direction.
143 0 : sf->highbd_predict[0][0][0] = aom_highbd_convolve8_horiz;
144 0 : sf->highbd_predict[0][0][1] = aom_highbd_convolve8_avg_horiz;
145 0 : sf->highbd_predict[0][1][0] = aom_highbd_convolve8;
146 0 : sf->highbd_predict[0][1][1] = aom_highbd_convolve8_avg;
147 0 : sf->highbd_predict[1][0][0] = aom_highbd_convolve8_horiz;
148 0 : sf->highbd_predict[1][0][1] = aom_highbd_convolve8_avg_horiz;
149 : } else {
150 : // Must always scale in both directions.
151 0 : sf->highbd_predict[0][0][0] = aom_highbd_convolve8;
152 0 : sf->highbd_predict[0][0][1] = aom_highbd_convolve8_avg;
153 0 : sf->highbd_predict[0][1][0] = aom_highbd_convolve8;
154 0 : sf->highbd_predict[0][1][1] = aom_highbd_convolve8_avg;
155 0 : sf->highbd_predict[1][0][0] = aom_highbd_convolve8;
156 0 : sf->highbd_predict[1][0][1] = aom_highbd_convolve8_avg;
157 : }
158 : }
159 : // 2D subpel motion always gets filtered in both directions.
160 0 : sf->highbd_predict[1][1][0] = aom_highbd_convolve8;
161 0 : sf->highbd_predict[1][1][1] = aom_highbd_convolve8_avg;
162 : }
163 : #endif // CONFIG_HIGHBITDEPTH
164 : }
|
