1 /*
2 * Copyright (c) 2014 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 VPX_VP9_ENCODER_VP9_AQ_CYCLICREFRESH_H_
12 #define VPX_VP9_ENCODER_VP9_AQ_CYCLICREFRESH_H_
13
14 #include "vpx/vpx_integer.h"
15 #include "vp9/common/vp9_blockd.h"
16 #include "vp9/encoder/vp9_block.h"
17 #include "vp9/encoder/vp9_skin_detection.h"
18
19 #ifdef __cplusplus
20 extern "C" {
21 #endif
22
23 // The segment ids used in cyclic refresh: from base (no boost) to increasing
24 // boost (higher delta-qp).
25 #define CR_SEGMENT_ID_BASE 0
26 #define CR_SEGMENT_ID_BOOST1 1
27 #define CR_SEGMENT_ID_BOOST2 2
28
29 // Maximum rate target ratio for setting segment delta-qp.
30 #define CR_MAX_RATE_TARGET_RATIO 4.0
31
32 struct CYCLIC_REFRESH {
33 // Percentage of blocks per frame that are targeted as candidates
34 // for cyclic refresh.
35 int percent_refresh;
36 // Maximum q-delta as percentage of base q.
37 int max_qdelta_perc;
38 // Superblock starting index for cycling through the frame.
39 int sb_index;
40 // Controls how long block will need to wait to be refreshed again, in
41 // excess of the cycle time, i.e., in the case of all zero motion, block
42 // will be refreshed every (100/percent_refresh + time_for_refresh) frames.
43 int time_for_refresh;
44 // Target number of (8x8) blocks that are set for delta-q.
45 int target_num_seg_blocks;
46 // Actual number of (8x8) blocks that were applied delta-q.
47 int actual_num_seg1_blocks;
48 int actual_num_seg2_blocks;
49 // RD mult. parameters for segment 1.
50 int rdmult;
51 // Cyclic refresh map.
52 signed char *map;
53 // Map of the last q a block was coded at.
54 uint8_t *last_coded_q_map;
55 // Thresholds applied to the projected rate/distortion of the coding block,
56 // when deciding whether block should be refreshed.
57 int64_t thresh_rate_sb;
58 int64_t thresh_dist_sb;
59 // Threshold applied to the motion vector (in units of 1/8 pel) of the
60 // coding block, when deciding whether block should be refreshed.
61 int16_t motion_thresh;
62 // Rate target ratio to set q delta.
63 double rate_ratio_qdelta;
64 // Boost factor for rate target ratio, for segment CR_SEGMENT_ID_BOOST2.
65 int rate_boost_fac;
66 double low_content_avg;
67 int qindex_delta[3];
68 int reduce_refresh;
69 double weight_segment;
70 int apply_cyclic_refresh;
71 int counter_encode_maxq_scene_change;
72 int skip_flat_static_blocks;
73 };
74
75 struct VP9_COMP;
76
77 typedef struct CYCLIC_REFRESH CYCLIC_REFRESH;
78
79 CYCLIC_REFRESH *vp9_cyclic_refresh_alloc(int mi_rows, int mi_cols);
80
81 void vp9_cyclic_refresh_free(CYCLIC_REFRESH *cr);
82
83 // Estimate the bits, incorporating the delta-q from segment 1, after encoding
84 // the frame.
85 int vp9_cyclic_refresh_estimate_bits_at_q(const struct VP9_COMP *cpi,
86 double correction_factor);
87
88 // Estimate the bits per mb, for a given q = i and a corresponding delta-q
89 // (for segment 1), prior to encoding the frame.
90 int vp9_cyclic_refresh_rc_bits_per_mb(const struct VP9_COMP *cpi, int i,
91 double correction_factor);
92
93 // Prior to coding a given prediction block, of size bsize at (mi_row, mi_col),
94 // check if we should reset the segment_id, and update the cyclic_refresh map
95 // and segmentation map.
96 void vp9_cyclic_refresh_update_segment(struct VP9_COMP *const cpi,
97 MODE_INFO *const mi, int mi_row,
98 int mi_col, BLOCK_SIZE bsize,
99 int64_t rate, int64_t dist, int skip,
100 struct macroblock_plane *const p);
101
102 void vp9_cyclic_refresh_update_sb_postencode(struct VP9_COMP *const cpi,
103 const MODE_INFO *const mi,
104 int mi_row, int mi_col,
105 BLOCK_SIZE bsize);
106
107 // Update the segmentation map, and related quantities: cyclic refresh map,
108 // refresh sb_index, and target number of blocks to be refreshed.
109 void vp9_cyclic_refresh_update__map(struct VP9_COMP *const cpi);
110
111 // From the just encoded frame: update the actual number of blocks that were
112 // applied the segment delta q, and the amount of low motion in the frame.
113 // Also check conditions for forcing golden update, or preventing golden
114 // update if the period is up.
115 void vp9_cyclic_refresh_postencode(struct VP9_COMP *const cpi);
116
117 // Set golden frame update interval, for non-svc 1 pass CBR mode.
118 void vp9_cyclic_refresh_set_golden_update(struct VP9_COMP *const cpi);
119
120 // Set/update global/frame level refresh parameters.
121 void vp9_cyclic_refresh_update_parameters(struct VP9_COMP *const cpi);
122
123 // Setup cyclic background refresh: set delta q and segmentation map.
124 void vp9_cyclic_refresh_setup(struct VP9_COMP *const cpi);
125
126 int vp9_cyclic_refresh_get_rdmult(const CYCLIC_REFRESH *cr);
127
128 void vp9_cyclic_refresh_reset_resize(struct VP9_COMP *const cpi);
129
cyclic_refresh_segment_id_boosted(int segment_id)130 static INLINE int cyclic_refresh_segment_id_boosted(int segment_id) {
131 return segment_id == CR_SEGMENT_ID_BOOST1 ||
132 segment_id == CR_SEGMENT_ID_BOOST2;
133 }
134
cyclic_refresh_segment_id(int segment_id)135 static INLINE int cyclic_refresh_segment_id(int segment_id) {
136 if (segment_id == CR_SEGMENT_ID_BOOST1)
137 return CR_SEGMENT_ID_BOOST1;
138 else if (segment_id == CR_SEGMENT_ID_BOOST2)
139 return CR_SEGMENT_ID_BOOST2;
140 else
141 return CR_SEGMENT_ID_BASE;
142 }
143
144 void vp9_cyclic_refresh_limit_q(const struct VP9_COMP *cpi, int *q);
145
146 #ifdef __cplusplus
147 } // extern "C"
148 #endif
149
150 #endif // VPX_VP9_ENCODER_VP9_AQ_CYCLICREFRESH_H_
151