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); 125 126 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 } 130 131 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
