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 AOM_AV1_COMMON_CONVOLVE_H_
13 #define AOM_AV1_COMMON_CONVOLVE_H_
14 #include "av1/common/filter.h"
15
16 #ifdef __cplusplus
17 extern "C" {
18 #endif
19
20 typedef uint16_t CONV_BUF_TYPE;
21 typedef struct ConvolveParams {
22 int do_average;
23 CONV_BUF_TYPE *dst;
24 int dst_stride;
25 int round_0;
26 int round_1;
27 int plane;
28 int is_compound;
29 int use_dist_wtd_comp_avg;
30 int fwd_offset;
31 int bck_offset;
32 } ConvolveParams;
33
34 typedef struct WienerConvolveParams {
35 int round_0;
36 int round_1;
37 } WienerConvolveParams;
38
39 #define ROUND0_BITS 3
40 #define COMPOUND_ROUND1_BITS 7
41 #define WIENER_ROUND0_BITS 3
42
43 #define WIENER_CLAMP_LIMIT(r0, bd) (1 << ((bd) + 1 + FILTER_BITS - r0))
44
45 typedef void (*aom_convolve_fn_t)(const uint8_t *src, int src_stride,
46 uint8_t *dst, int dst_stride, int w, int h,
47 const InterpFilterParams *filter_params_x,
48 const InterpFilterParams *filter_params_y,
49 const int subpel_x_qn, const int subpel_y_qn,
50 ConvolveParams *conv_params);
51
52 typedef void (*aom_highbd_convolve_fn_t)(
53 const uint16_t *src, int src_stride, uint16_t *dst, int dst_stride, int w,
54 int h, const InterpFilterParams *filter_params_x,
55 const InterpFilterParams *filter_params_y, const int subpel_x_qn,
56 const int subpel_y_qn, ConvolveParams *conv_params, int bd);
57
58 struct AV1Common;
59 struct scale_factors;
60
61 void av1_convolve_2d_facade(const uint8_t *src, int src_stride, uint8_t *dst,
62 int dst_stride, int w, int h,
63 const InterpFilterParams *interp_filters[2],
64 const int subpel_x_qn, int x_step_q4,
65 const int subpel_y_qn, int y_step_q4, int scaled,
66 ConvolveParams *conv_params);
67
get_conv_params_no_round(int cmp_index,int plane,CONV_BUF_TYPE * dst,int dst_stride,int is_compound,int bd)68 static inline ConvolveParams get_conv_params_no_round(int cmp_index, int plane,
69 CONV_BUF_TYPE *dst,
70 int dst_stride,
71 int is_compound, int bd) {
72 ConvolveParams conv_params;
73 assert(IMPLIES(cmp_index, is_compound));
74
75 conv_params.is_compound = is_compound;
76 conv_params.use_dist_wtd_comp_avg = 0;
77 conv_params.round_0 = ROUND0_BITS;
78 conv_params.round_1 = is_compound ? COMPOUND_ROUND1_BITS
79 : 2 * FILTER_BITS - conv_params.round_0;
80 #if CONFIG_AV1_HIGHBITDEPTH
81 const int intbufrange = bd + FILTER_BITS - conv_params.round_0 + 2;
82 assert(IMPLIES(bd < 12, intbufrange <= 16));
83 if (intbufrange > 16) {
84 conv_params.round_0 += intbufrange - 16;
85 if (!is_compound) conv_params.round_1 -= intbufrange - 16;
86 }
87 #else
88 (void)bd;
89 #endif // CONFIG_AV1_HIGHBITDEPTH
90 // TODO(yunqing): The following dst should only be valid while
91 // is_compound = 1;
92 conv_params.dst = dst;
93 conv_params.dst_stride = dst_stride;
94 conv_params.plane = plane;
95
96 // By default, set do average to 1 if this is the second single prediction
97 // in a compound mode.
98 conv_params.do_average = cmp_index;
99 return conv_params;
100 }
101
get_conv_params(int do_average,int plane,int bd)102 static inline ConvolveParams get_conv_params(int do_average, int plane,
103 int bd) {
104 return get_conv_params_no_round(do_average, plane, NULL, 0, 0, bd);
105 }
106
get_conv_params_wiener(int bd)107 static inline WienerConvolveParams get_conv_params_wiener(int bd) {
108 WienerConvolveParams conv_params;
109 conv_params.round_0 = WIENER_ROUND0_BITS;
110 conv_params.round_1 = 2 * FILTER_BITS - conv_params.round_0;
111 const int intbufrange = bd + FILTER_BITS - conv_params.round_0 + 2;
112 assert(IMPLIES(bd < 12, intbufrange <= 16));
113 if (intbufrange > 16) {
114 conv_params.round_0 += intbufrange - 16;
115 conv_params.round_1 -= intbufrange - 16;
116 }
117 return conv_params;
118 }
119
120 void av1_highbd_convolve_2d_facade(const uint8_t *src8, int src_stride,
121 uint8_t *dst, int dst_stride, int w, int h,
122 const InterpFilterParams *interp_filters[2],
123 const int subpel_x_qn, int x_step_q4,
124 const int subpel_y_qn, int y_step_q4,
125 int scaled, ConvolveParams *conv_params,
126 int bd);
127
128 #ifdef __cplusplus
129 } // extern "C"
130 #endif
131
132 #endif // AOM_AV1_COMMON_CONVOLVE_H_
133