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
12 #ifndef VP9_ENCODER_VP9_AQ_CYCLICREFRESH_H_
13 #define VP9_ENCODER_VP9_AQ_CYCLICREFRESH_H_
14
15 #include "vpx/vpx_integer.h"
16 #include "vp9/common/vp9_blockd.h"
17
18 #ifdef __cplusplus
19 extern "C" {
20 #endif
21
22 // The segment ids used in cyclic refresh: from base (no boost) to increasing
23 // boost (higher delta-qp).
24 #define CR_SEGMENT_ID_BASE 0
25 #define CR_SEGMENT_ID_BOOST1 1
26 #define CR_SEGMENT_ID_BOOST2 2
27
28 // Maximum rate target ratio for setting segment delta-qp.
29 #define CR_MAX_RATE_TARGET_RATIO 4.0
30
31 struct CYCLIC_REFRESH {
32 // Percentage of blocks per frame that are targeted as candidates
33 // for cyclic refresh.
34 int percent_refresh;
35 // Maximum q-delta as percentage of base q.
36 int max_qdelta_perc;
37 // Superblock starting index for cycling through the frame.
38 int sb_index;
39 // Controls how long block will need to wait to be refreshed again, in
40 // excess of the cycle time, i.e., in the case of all zero motion, block
41 // will be refreshed every (100/percent_refresh + time_for_refresh) frames.
42 int time_for_refresh;
43 // Target number of (8x8) blocks that are set for delta-q.
44 int target_num_seg_blocks;
45 // Actual number of (8x8) blocks that were applied delta-q.
46 int actual_num_seg1_blocks;
47 int actual_num_seg2_blocks;
48 // RD mult. parameters for segment 1.
49 int rdmult;
50 // Cyclic refresh map.
51 signed char *map;
52 // Map of the last q a block was coded at.
53 uint8_t *last_coded_q_map;
54 // Count on how many consecutive times a block uses ZER0MV for encoding.
55 uint8_t *consec_zero_mv;
56 // Thresholds applied to the projected rate/distortion of the coding block,
57 // when deciding whether block should be refreshed.
58 int64_t thresh_rate_sb;
59 int64_t thresh_dist_sb;
60 // Threshold applied to the motion vector (in units of 1/8 pel) of the
61 // coding block, when deciding whether block should be refreshed.
62 int16_t motion_thresh;
63 // Rate target ratio to set q delta.
64 double rate_ratio_qdelta;
65 // Boost factor for rate target ratio, for segment CR_SEGMENT_ID_BOOST2.
66 int rate_boost_fac;
67 double low_content_avg;
68 int qindex_delta[3];
69 int reduce_refresh;
70 };
71
72 struct VP9_COMP;
73
74 typedef struct CYCLIC_REFRESH CYCLIC_REFRESH;
75
76 CYCLIC_REFRESH *vp9_cyclic_refresh_alloc(int mi_rows, int mi_cols);
77
78 void vp9_cyclic_refresh_free(CYCLIC_REFRESH *cr);
79
80 // Estimate the bits, incorporating the delta-q from segment 1, after encoding
81 // the frame.
82 int vp9_cyclic_refresh_estimate_bits_at_q(const struct VP9_COMP *cpi,
83 double correction_factor);
84
85 // Estimate the bits per mb, for a given q = i and a corresponding delta-q
86 // (for segment 1), prior to encoding the frame.
87 int vp9_cyclic_refresh_rc_bits_per_mb(const struct VP9_COMP *cpi, int i,
88 double correction_factor);
89
90 // Prior to coding a given prediction block, of size bsize at (mi_row, mi_col),
91 // check if we should reset the segment_id, and update the cyclic_refresh map
92 // and segmentation map.
93 void vp9_cyclic_refresh_update_segment(struct VP9_COMP *const cpi,
94 MB_MODE_INFO *const mbmi,
95 int mi_row, int mi_col, BLOCK_SIZE bsize,
96 int64_t rate, int64_t dist, int skip);
97
98 void vp9_cyclic_refresh_update_sb_postencode(struct VP9_COMP *const cpi,
99 const MB_MODE_INFO *const mbmi,
100 int mi_row, int mi_col,
101 BLOCK_SIZE bsize);
102
103 // Update the segmentation map, and related quantities: cyclic refresh map,
104 // refresh sb_index, and target number of blocks to be refreshed.
105 void vp9_cyclic_refresh_update__map(struct VP9_COMP *const cpi);
106
107 // Update the actual number of blocks that were applied the segment delta q.
108 void vp9_cyclic_refresh_postencode(struct VP9_COMP *const cpi);
109
110 // Set golden frame update interval, for non-svc 1 pass CBR mode.
111 void vp9_cyclic_refresh_set_golden_update(struct VP9_COMP *const cpi);
112
113 // Check if we should not update golden reference, based on past refresh stats.
114 void vp9_cyclic_refresh_check_golden_update(struct VP9_COMP *const cpi);
115
116 // Set/update global/frame level refresh parameters.
117 void vp9_cyclic_refresh_update_parameters(struct VP9_COMP *const cpi);
118
119 // Setup cyclic background refresh: set delta q and segmentation map.
120 void vp9_cyclic_refresh_setup(struct VP9_COMP *const cpi);
121
122 int vp9_cyclic_refresh_get_rdmult(const CYCLIC_REFRESH *cr);
123
124 void vp9_cyclic_refresh_reset_resize(struct VP9_COMP *const cpi);
125
cyclic_refresh_segment_id_boosted(int segment_id)126 static INLINE int cyclic_refresh_segment_id_boosted(int segment_id) {
127 return segment_id == CR_SEGMENT_ID_BOOST1 ||
128 segment_id == CR_SEGMENT_ID_BOOST2;
129 }
130
cyclic_refresh_segment_id(int segment_id)131 static INLINE int cyclic_refresh_segment_id(int segment_id) {
132 if (segment_id == CR_SEGMENT_ID_BOOST1)
133 return CR_SEGMENT_ID_BOOST1;
134 else if (segment_id == CR_SEGMENT_ID_BOOST2)
135 return CR_SEGMENT_ID_BOOST2;
136 else
137 return CR_SEGMENT_ID_BASE;
138 }
139
140 #ifdef __cplusplus
141 } // extern "C"
142 #endif
143
144 #endif // VP9_ENCODER_VP9_AQ_CYCLICREFRESH_H_
145