Line data Source code
1 : /*
2 : * Copyright (c) 2013 The WebM project authors. All Rights Reserved.
3 : *
4 : * Use of this source code is governed by a BSD-style license
5 : * that can be found in the LICENSE file in the root of the source
6 : * tree. An additional intellectual property rights grant can be found
7 : * in the file PATENTS. All contributing project authors may
8 : * be found in the AUTHORS file in the root of the source tree.
9 : */
10 :
11 : #include "./vpx_dsp_rtcd.h"
12 : #include "vp9/common/vp9_filter.h"
13 : #include "vp9/common/vp9_scale.h"
14 : #include "vpx_dsp/vpx_filter.h"
15 :
16 0 : static INLINE int scaled_x(int val, const struct scale_factors *sf) {
17 0 : return (int)((int64_t)val * sf->x_scale_fp >> REF_SCALE_SHIFT);
18 : }
19 :
20 0 : static INLINE int scaled_y(int val, const struct scale_factors *sf) {
21 0 : return (int)((int64_t)val * sf->y_scale_fp >> REF_SCALE_SHIFT);
22 : }
23 :
24 0 : static int unscaled_value(int val, const struct scale_factors *sf) {
25 : (void)sf;
26 0 : return val;
27 : }
28 :
29 0 : static int get_fixed_point_scale_factor(int other_size, int this_size) {
30 : // Calculate scaling factor once for each reference frame
31 : // and use fixed point scaling factors in decoding and encoding routines.
32 : // Hardware implementations can calculate scale factor in device driver
33 : // and use multiplication and shifting on hardware instead of division.
34 0 : return (other_size << REF_SCALE_SHIFT) / this_size;
35 : }
36 :
37 0 : MV32 vp9_scale_mv(const MV *mv, int x, int y, const struct scale_factors *sf) {
38 0 : const int x_off_q4 = scaled_x(x << SUBPEL_BITS, sf) & SUBPEL_MASK;
39 0 : const int y_off_q4 = scaled_y(y << SUBPEL_BITS, sf) & SUBPEL_MASK;
40 0 : const MV32 res = { scaled_y(mv->row, sf) + y_off_q4,
41 0 : scaled_x(mv->col, sf) + x_off_q4 };
42 0 : return res;
43 : }
44 :
45 : #if CONFIG_VP9_HIGHBITDEPTH
46 : void vp9_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_highbd) {
49 : #else
50 0 : void vp9_setup_scale_factors_for_frame(struct scale_factors *sf, int other_w,
51 : int other_h, int this_w, int this_h) {
52 : #endif
53 0 : if (!valid_ref_frame_size(other_w, other_h, this_w, this_h)) {
54 0 : sf->x_scale_fp = REF_INVALID_SCALE;
55 0 : sf->y_scale_fp = REF_INVALID_SCALE;
56 0 : return;
57 : }
58 :
59 0 : sf->x_scale_fp = get_fixed_point_scale_factor(other_w, this_w);
60 0 : sf->y_scale_fp = get_fixed_point_scale_factor(other_h, this_h);
61 0 : sf->x_step_q4 = scaled_x(16, sf);
62 0 : sf->y_step_q4 = scaled_y(16, sf);
63 :
64 0 : if (vp9_is_scaled(sf)) {
65 0 : sf->scale_value_x = scaled_x;
66 0 : sf->scale_value_y = scaled_y;
67 : } else {
68 0 : sf->scale_value_x = unscaled_value;
69 0 : sf->scale_value_y = unscaled_value;
70 : }
71 :
72 : // TODO(agrange): Investigate the best choice of functions to use here
73 : // for EIGHTTAP_SMOOTH. Since it is not interpolating, need to choose what
74 : // to do at full-pel offsets. The current selection, where the filter is
75 : // applied in one direction only, and not at all for 0,0, seems to give the
76 : // best quality, but it may be worth trying an additional mode that does
77 : // do the filtering on full-pel.
78 :
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] = vpx_convolve_copy;
83 0 : sf->predict[0][0][1] = vpx_convolve_avg;
84 0 : sf->predict[0][1][0] = vpx_convolve8_vert;
85 0 : sf->predict[0][1][1] = vpx_convolve8_avg_vert;
86 0 : sf->predict[1][0][0] = vpx_convolve8_horiz;
87 0 : sf->predict[1][0][1] = vpx_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] = vpx_scaled_vert;
91 0 : sf->predict[0][0][1] = vpx_scaled_avg_vert;
92 0 : sf->predict[0][1][0] = vpx_scaled_vert;
93 0 : sf->predict[0][1][1] = vpx_scaled_avg_vert;
94 0 : sf->predict[1][0][0] = vpx_scaled_2d;
95 0 : sf->predict[1][0][1] = vpx_scaled_avg_2d;
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] = vpx_scaled_horiz;
101 0 : sf->predict[0][0][1] = vpx_scaled_avg_horiz;
102 0 : sf->predict[0][1][0] = vpx_scaled_2d;
103 0 : sf->predict[0][1][1] = vpx_scaled_avg_2d;
104 0 : sf->predict[1][0][0] = vpx_scaled_horiz;
105 0 : sf->predict[1][0][1] = vpx_scaled_avg_horiz;
106 : } else {
107 : // Must always scale in both directions.
108 0 : sf->predict[0][0][0] = vpx_scaled_2d;
109 0 : sf->predict[0][0][1] = vpx_scaled_avg_2d;
110 0 : sf->predict[0][1][0] = vpx_scaled_2d;
111 0 : sf->predict[0][1][1] = vpx_scaled_avg_2d;
112 0 : sf->predict[1][0][0] = vpx_scaled_2d;
113 0 : sf->predict[1][0][1] = vpx_scaled_avg_2d;
114 : }
115 : }
116 :
117 : // 2D subpel motion always gets filtered in both directions
118 :
119 0 : if ((sf->x_step_q4 != 16) || (sf->y_step_q4 != 16)) {
120 0 : sf->predict[1][1][0] = vpx_scaled_2d;
121 0 : sf->predict[1][1][1] = vpx_scaled_avg_2d;
122 : } else {
123 0 : sf->predict[1][1][0] = vpx_convolve8;
124 0 : sf->predict[1][1][1] = vpx_convolve8_avg;
125 : }
126 :
127 : #if CONFIG_VP9_HIGHBITDEPTH
128 : if (use_highbd) {
129 : if (sf->x_step_q4 == 16) {
130 : if (sf->y_step_q4 == 16) {
131 : // No scaling in either direction.
132 : sf->highbd_predict[0][0][0] = vpx_highbd_convolve_copy;
133 : sf->highbd_predict[0][0][1] = vpx_highbd_convolve_avg;
134 : sf->highbd_predict[0][1][0] = vpx_highbd_convolve8_vert;
135 : sf->highbd_predict[0][1][1] = vpx_highbd_convolve8_avg_vert;
136 : sf->highbd_predict[1][0][0] = vpx_highbd_convolve8_horiz;
137 : sf->highbd_predict[1][0][1] = vpx_highbd_convolve8_avg_horiz;
138 : } else {
139 : // No scaling in x direction. Must always scale in the y direction.
140 : sf->highbd_predict[0][0][0] = vpx_highbd_convolve8_vert;
141 : sf->highbd_predict[0][0][1] = vpx_highbd_convolve8_avg_vert;
142 : sf->highbd_predict[0][1][0] = vpx_highbd_convolve8_vert;
143 : sf->highbd_predict[0][1][1] = vpx_highbd_convolve8_avg_vert;
144 : sf->highbd_predict[1][0][0] = vpx_highbd_convolve8;
145 : sf->highbd_predict[1][0][1] = vpx_highbd_convolve8_avg;
146 : }
147 : } else {
148 : if (sf->y_step_q4 == 16) {
149 : // No scaling in the y direction. Must always scale in the x direction.
150 : sf->highbd_predict[0][0][0] = vpx_highbd_convolve8_horiz;
151 : sf->highbd_predict[0][0][1] = vpx_highbd_convolve8_avg_horiz;
152 : sf->highbd_predict[0][1][0] = vpx_highbd_convolve8;
153 : sf->highbd_predict[0][1][1] = vpx_highbd_convolve8_avg;
154 : sf->highbd_predict[1][0][0] = vpx_highbd_convolve8_horiz;
155 : sf->highbd_predict[1][0][1] = vpx_highbd_convolve8_avg_horiz;
156 : } else {
157 : // Must always scale in both directions.
158 : sf->highbd_predict[0][0][0] = vpx_highbd_convolve8;
159 : sf->highbd_predict[0][0][1] = vpx_highbd_convolve8_avg;
160 : sf->highbd_predict[0][1][0] = vpx_highbd_convolve8;
161 : sf->highbd_predict[0][1][1] = vpx_highbd_convolve8_avg;
162 : sf->highbd_predict[1][0][0] = vpx_highbd_convolve8;
163 : sf->highbd_predict[1][0][1] = vpx_highbd_convolve8_avg;
164 : }
165 : }
166 : // 2D subpel motion always gets filtered in both directions.
167 : sf->highbd_predict[1][1][0] = vpx_highbd_convolve8;
168 : sf->highbd_predict[1][1][1] = vpx_highbd_convolve8_avg;
169 : }
170 : #endif
171 : }
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