encodemv.h (4088B)
1 /* 2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved. 3 * 4 * This source code is subject to the terms of the BSD 2 Clause License and 5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 6 * was not distributed with this source code in the LICENSE file, you can 7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open 8 * Media Patent License 1.0 was not distributed with this source code in the 9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent. 10 */ 11 12 #ifndef AOM_AV1_ENCODER_ENCODEMV_H_ 13 #define AOM_AV1_ENCODER_ENCODEMV_H_ 14 15 #include "av1/encoder/encoder.h" 16 17 #ifdef __cplusplus 18 extern "C" { 19 #endif 20 21 void av1_encode_mv(AV1_COMP *cpi, aom_writer *w, ThreadData *td, const MV *mv, 22 const MV *ref, nmv_context *mvctx, int usehp); 23 24 void av1_update_mv_stats(const MV *mv, const MV *ref, nmv_context *mvctx, 25 MvSubpelPrecision precision); 26 27 void av1_build_nmv_cost_table(int *mvjoint, int *mvcost[2], 28 const nmv_context *mvctx, 29 MvSubpelPrecision precision); 30 void av1_build_nmv_component_cost_table(int *mvcost, 31 const nmv_component *const mvcomp, 32 MvSubpelPrecision precision); 33 34 void av1_update_mv_count(ThreadData *td); 35 36 void av1_encode_dv(aom_writer *w, const MV *mv, const MV *ref, 37 nmv_context *mvctx); 38 int_mv av1_get_ref_mv(const MACROBLOCK *x, int ref_idx); 39 int_mv av1_get_ref_mv_from_stack(int ref_idx, 40 const MV_REFERENCE_FRAME *ref_frame, 41 int ref_mv_idx, 42 const MB_MODE_INFO_EXT *mbmi_ext); 43 void av1_find_best_ref_mvs_from_stack(int allow_hp, 44 const MB_MODE_INFO_EXT *mbmi_ext, 45 MV_REFERENCE_FRAME ref_frame, 46 int_mv *nearest_mv, int_mv *near_mv, 47 int is_integer); 48 49 static inline MV_JOINT_TYPE av1_get_mv_joint(const MV *mv) { 50 // row: Z col: Z | MV_JOINT_ZERO (0) 51 // row: Z col: NZ | MV_JOINT_HNZVZ (1) 52 // row: NZ col: Z | MV_JOINT_HZVNZ (2) 53 // row: NZ col: NZ | MV_JOINT_HNZVNZ (3) 54 return (!!mv->col) | ((!!mv->row) << 1); 55 } 56 57 static inline int av1_mv_class_base(MV_CLASS_TYPE c) { 58 return c ? CLASS0_SIZE << (c + 2) : 0; 59 } 60 61 // If n != 0, returns the floor of log base 2 of n. If n == 0, returns 0. 62 static inline uint8_t av1_log_in_base_2(unsigned int n) { 63 // get_msb() is only valid when n != 0. 64 return n == 0 ? 0 : get_msb(n); 65 } 66 67 static inline MV_CLASS_TYPE av1_get_mv_class(int z, int *offset) { 68 assert(z >= 0); 69 const MV_CLASS_TYPE c = (MV_CLASS_TYPE)av1_log_in_base_2(z >> 3); 70 assert(c <= MV_CLASS_10); 71 if (offset) *offset = z - av1_mv_class_base(c); 72 return c; 73 } 74 75 static inline int av1_check_newmv_joint_nonzero(const AV1_COMMON *cm, 76 MACROBLOCK *const x) { 77 (void)cm; 78 MACROBLOCKD *xd = &x->e_mbd; 79 MB_MODE_INFO *mbmi = xd->mi[0]; 80 const PREDICTION_MODE this_mode = mbmi->mode; 81 if (this_mode == NEW_NEWMV) { 82 const int_mv ref_mv_0 = av1_get_ref_mv(x, 0); 83 const int_mv ref_mv_1 = av1_get_ref_mv(x, 1); 84 if (mbmi->mv[0].as_int == ref_mv_0.as_int || 85 mbmi->mv[1].as_int == ref_mv_1.as_int) { 86 return 0; 87 } 88 } else if (this_mode == NEAREST_NEWMV || this_mode == NEAR_NEWMV) { 89 const int_mv ref_mv_1 = av1_get_ref_mv(x, 1); 90 if (mbmi->mv[1].as_int == ref_mv_1.as_int) { 91 return 0; 92 } 93 } else if (this_mode == NEW_NEARESTMV || this_mode == NEW_NEARMV) { 94 const int_mv ref_mv_0 = av1_get_ref_mv(x, 0); 95 if (mbmi->mv[0].as_int == ref_mv_0.as_int) { 96 return 0; 97 } 98 } else if (this_mode == NEWMV) { 99 const int_mv ref_mv_0 = av1_get_ref_mv(x, 0); 100 if (mbmi->mv[0].as_int == ref_mv_0.as_int) { 101 return 0; 102 } 103 } 104 return 1; 105 } 106 #ifdef __cplusplus 107 } // extern "C" 108 #endif 109 110 #endif // AOM_AV1_ENCODER_ENCODEMV_H_