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 VP9_ENCODER_VP9_AQ_CYCLICREFRESH_H_ 12 #define 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 }; 72 73 struct VP9_COMP; 74 75 typedef struct CYCLIC_REFRESH CYCLIC_REFRESH; 76 77 CYCLIC_REFRESH *vp9_cyclic_refresh_alloc(int mi_rows, int mi_cols); 78 79 void vp9_cyclic_refresh_free(CYCLIC_REFRESH *cr); 80 81 // Estimate the bits, incorporating the delta-q from segment 1, after encoding 82 // the frame. 83 int vp9_cyclic_refresh_estimate_bits_at_q(const struct VP9_COMP *cpi, 84 double correction_factor); 85 86 // Estimate the bits per mb, for a given q = i and a corresponding delta-q 87 // (for segment 1), prior to encoding the frame. 88 int vp9_cyclic_refresh_rc_bits_per_mb(const struct VP9_COMP *cpi, int i, 89 double correction_factor); 90 91 // Prior to coding a given prediction block, of size bsize at (mi_row, mi_col), 92 // check if we should reset the segment_id, and update the cyclic_refresh map 93 // and segmentation map. 94 void vp9_cyclic_refresh_update_segment(struct VP9_COMP *const cpi, 95 MODE_INFO *const mi, int mi_row, 96 int mi_col, BLOCK_SIZE bsize, 97 int64_t rate, int64_t dist, int skip, 98 struct macroblock_plane *const p); 99 100 void vp9_cyclic_refresh_update_sb_postencode(struct VP9_COMP *const cpi, 101 const MODE_INFO *const mi, 102 int mi_row, int mi_col, 103 BLOCK_SIZE bsize); 104 105 // Update the segmentation map, and related quantities: cyclic refresh map, 106 // refresh sb_index, and target number of blocks to be refreshed. 107 void vp9_cyclic_refresh_update__map(struct VP9_COMP *const cpi); 108 109 // From the just encoded frame: update the actual number of blocks that were 110 // applied the segment delta q, and the amount of low motion in the frame. 111 // Also check conditions for forcing golden update, or preventing golden 112 // update if the period is up. 113 void vp9_cyclic_refresh_postencode(struct VP9_COMP *const cpi); 114 115 // Set golden frame update interval, for non-svc 1 pass CBR mode. 116 void vp9_cyclic_refresh_set_golden_update(struct VP9_COMP *const cpi); 117 118 // Set/update global/frame level refresh parameters. 119 void vp9_cyclic_refresh_update_parameters(struct VP9_COMP *const cpi); 120 121 // Setup cyclic background refresh: set delta q and segmentation map. 122 void vp9_cyclic_refresh_setup(struct VP9_COMP *const cpi); 123 124 int vp9_cyclic_refresh_get_rdmult(const CYCLIC_REFRESH *cr); 125 126 void vp9_cyclic_refresh_reset_resize(struct VP9_COMP *const cpi); 127 128 static INLINE int cyclic_refresh_segment_id_boosted(int segment_id) { 129 return segment_id == CR_SEGMENT_ID_BOOST1 || 130 segment_id == CR_SEGMENT_ID_BOOST2; 131 } 132 133 static INLINE int cyclic_refresh_segment_id(int segment_id) { 134 if (segment_id == CR_SEGMENT_ID_BOOST1) 135 return CR_SEGMENT_ID_BOOST1; 136 else if (segment_id == CR_SEGMENT_ID_BOOST2) 137 return CR_SEGMENT_ID_BOOST2; 138 else 139 return CR_SEGMENT_ID_BASE; 140 } 141 142 #ifdef __cplusplus 143 } // extern "C" 144 #endif 145 146 #endif // VP9_ENCODER_VP9_AQ_CYCLICREFRESH_H_ 147
