1 /*
2 * Copyright (c) 2010 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 #ifndef VP9_COMMON_VP9_LOOPFILTER_H_
12 #define VP9_COMMON_VP9_LOOPFILTER_H_
13
14 #include "vpx_ports/mem.h"
15 #include "./vpx_config.h"
16
17 #include "vp9/common/vp9_blockd.h"
18 #include "vp9/common/vp9_seg_common.h"
19
20 #ifdef __cplusplus
21 extern "C" {
22 #endif
23
24 #define MAX_LOOP_FILTER 63
25 #define MAX_SHARPNESS 7
26
27 #define SIMD_WIDTH 16
28
29 #define MAX_REF_LF_DELTAS 4
30 #define MAX_MODE_LF_DELTAS 2
31
32 enum lf_path {
33 LF_PATH_420,
34 LF_PATH_444,
35 LF_PATH_SLOW,
36 };
37
38 // Need to align this structure so when it is declared and
39 // passed it can be loaded into vector registers.
40 typedef struct {
41 DECLARE_ALIGNED(SIMD_WIDTH, uint8_t, mblim[SIMD_WIDTH]);
42 DECLARE_ALIGNED(SIMD_WIDTH, uint8_t, lim[SIMD_WIDTH]);
43 DECLARE_ALIGNED(SIMD_WIDTH, uint8_t, hev_thr[SIMD_WIDTH]);
44 } loop_filter_thresh;
45
46 typedef struct {
47 loop_filter_thresh lfthr[MAX_LOOP_FILTER + 1];
48 uint8_t lvl[MAX_SEGMENTS][MAX_REF_FRAMES][MAX_MODE_LF_DELTAS];
49 } loop_filter_info_n;
50
51 // This structure holds bit masks for all 8x8 blocks in a 64x64 region.
52 // Each 1 bit represents a position in which we want to apply the loop filter.
53 // Left_ entries refer to whether we apply a filter on the border to the
54 // left of the block. Above_ entries refer to whether or not to apply a
55 // filter on the above border. Int_ entries refer to whether or not to
56 // apply borders on the 4x4 edges within the 8x8 block that each bit
57 // represents.
58 // Since each transform is accompanied by a potentially different type of
59 // loop filter there is a different entry in the array for each transform size.
60 typedef struct {
61 uint64_t left_y[TX_SIZES];
62 uint64_t above_y[TX_SIZES];
63 uint64_t int_4x4_y;
64 uint16_t left_uv[TX_SIZES];
65 uint16_t above_uv[TX_SIZES];
66 uint16_t int_4x4_uv;
67 uint8_t lfl_y[64];
68 } LOOP_FILTER_MASK;
69
70 struct loopfilter {
71 int filter_level;
72 int last_filt_level;
73
74 int sharpness_level;
75 int last_sharpness_level;
76
77 uint8_t mode_ref_delta_enabled;
78 uint8_t mode_ref_delta_update;
79
80 // 0 = Intra, Last, GF, ARF
81 signed char ref_deltas[MAX_REF_LF_DELTAS];
82 signed char last_ref_deltas[MAX_REF_LF_DELTAS];
83
84 // 0 = ZERO_MV, MV
85 signed char mode_deltas[MAX_MODE_LF_DELTAS];
86 signed char last_mode_deltas[MAX_MODE_LF_DELTAS];
87
88 LOOP_FILTER_MASK *lfm;
89 int lfm_stride;
90 };
91
92 /* assorted loopfilter functions which get used elsewhere */
93 struct VP9Common;
94 struct macroblockd;
95 struct VP9LfSyncData;
96
97 // This function sets up the bit masks for the entire 64x64 region represented
98 // by mi_row, mi_col.
99 void vp9_setup_mask(struct VP9Common *const cm, const int mi_row,
100 const int mi_col, MODE_INFO **mi_8x8,
101 const int mode_info_stride, LOOP_FILTER_MASK *lfm);
102
103 void vp9_filter_block_plane_ss00(struct VP9Common *const cm,
104 struct macroblockd_plane *const plane,
105 int mi_row, LOOP_FILTER_MASK *lfm);
106
107 void vp9_filter_block_plane_ss11(struct VP9Common *const cm,
108 struct macroblockd_plane *const plane,
109 int mi_row, LOOP_FILTER_MASK *lfm);
110
111 void vp9_filter_block_plane_non420(struct VP9Common *cm,
112 struct macroblockd_plane *plane,
113 MODE_INFO **mi_8x8, int mi_row, int mi_col);
114
115 void vp9_loop_filter_init(struct VP9Common *cm);
116
117 // Update the loop filter for the current frame.
118 // This should be called before vp9_loop_filter_frame(), vp9_build_mask_frame()
119 // calls this function directly.
120 void vp9_loop_filter_frame_init(struct VP9Common *cm, int default_filt_lvl);
121
122 void vp9_loop_filter_frame(YV12_BUFFER_CONFIG *frame, struct VP9Common *cm,
123 struct macroblockd *mbd, int filter_level,
124 int y_only, int partial_frame);
125
126 // Get the superblock lfm for a given mi_row, mi_col.
get_lfm(const struct loopfilter * lf,const int mi_row,const int mi_col)127 static INLINE LOOP_FILTER_MASK *get_lfm(const struct loopfilter *lf,
128 const int mi_row, const int mi_col) {
129 return &lf->lfm[(mi_col >> 3) + ((mi_row >> 3) * lf->lfm_stride)];
130 }
131
132 void vp9_build_mask(struct VP9Common *cm, const MODE_INFO *mi, int mi_row,
133 int mi_col, int bw, int bh);
134 void vp9_adjust_mask(struct VP9Common *const cm, const int mi_row,
135 const int mi_col, LOOP_FILTER_MASK *lfm);
136 void vp9_build_mask_frame(struct VP9Common *cm, int frame_filter_level,
137 int partial_frame);
138 void vp9_reset_lfm(struct VP9Common *const cm);
139
140 typedef struct LoopFilterWorkerData {
141 YV12_BUFFER_CONFIG *frame_buffer;
142 struct VP9Common *cm;
143 struct macroblockd_plane planes[MAX_MB_PLANE];
144
145 int start;
146 int stop;
147 int y_only;
148 } LFWorkerData;
149
150 void vp9_loop_filter_data_reset(
151 LFWorkerData *lf_data, YV12_BUFFER_CONFIG *frame_buffer,
152 struct VP9Common *cm, const struct macroblockd_plane planes[MAX_MB_PLANE]);
153
154 // Operates on the rows described by 'lf_data'.
155 int vp9_loop_filter_worker(LFWorkerData *const lf_data, void *unused);
156 #ifdef __cplusplus
157 } // extern "C"
158 #endif
159
160 #endif // VP9_COMMON_VP9_LOOPFILTER_H_
161