motion_est.h (5112B)
1 /* 2 * Motion estimation 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21 #ifndef AVCODEC_MOTION_EST_H 22 #define AVCODEC_MOTION_EST_H 23 24 #include <stdint.h> 25 26 #include "avcodec.h" 27 #include "hpeldsp.h" 28 #include "me_cmp.h" 29 #include "qpeldsp.h" 30 31 struct MpegEncContext; 32 33 #if ARCH_IA64 // Limit static arrays to avoid gcc failing "short data segment overflowed" 34 #define MAX_MV 1024 35 #else 36 #define MAX_MV 4096 37 #endif 38 #define MAX_DMV (2*MAX_MV) 39 #define ME_MAP_SIZE 64 40 41 #define FF_ME_ZERO 0 42 #define FF_ME_EPZS 1 43 #define FF_ME_XONE 2 44 45 /** 46 * Motion estimation context. 47 */ 48 typedef struct MotionEstContext { 49 AVCodecContext *avctx; 50 int skip; ///< set if ME is skipped for the current MB 51 int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME 52 int direct_basis_mv[4][2]; 53 uint8_t *scratchpad; /**< data area for the ME algo, so that 54 * the ME does not need to malloc/free. */ 55 uint8_t *temp; 56 uint32_t *map; ///< map to avoid duplicate evaluations 57 uint32_t *score_map; ///< map to store the scores 58 unsigned map_generation; 59 int pre_penalty_factor; 60 int penalty_factor; /**< an estimate of the bits required to 61 * code a given mv value, e.g. (1,0) takes 62 * more bits than (0,0). We have to 63 * estimate whether any reduction in 64 * residual is worth the extra bits. */ 65 int sub_penalty_factor; 66 int mb_penalty_factor; 67 int flags; 68 int sub_flags; 69 int mb_flags; 70 int pre_pass; ///< = 1 for the pre pass 71 int dia_size; 72 int xmin; 73 int xmax; 74 int ymin; 75 int ymax; 76 int pred_x; 77 int pred_y; 78 const uint8_t *src[4][4]; 79 const uint8_t *ref[4][4]; 80 int stride; 81 int uvstride; 82 /* temp variables for picture complexity calculation */ 83 int64_t mc_mb_var_sum_temp; 84 int64_t mb_var_sum_temp; 85 int scene_change_score; 86 87 me_cmp_func me_pre_cmp[6]; 88 me_cmp_func me_cmp[6]; 89 me_cmp_func me_sub_cmp[6]; 90 me_cmp_func mb_cmp[6]; 91 92 me_cmp_func pix_abs[2][4]; 93 me_cmp_func sse; 94 95 op_pixels_func(*hpel_put)[4]; 96 op_pixels_func(*hpel_avg)[4]; 97 qpel_mc_func(*qpel_put)[16]; 98 qpel_mc_func(*qpel_avg)[16]; 99 const uint8_t (*mv_penalty)[MAX_DMV * 2 + 1]; ///< bit amount needed to encode a MV 100 const uint8_t *current_mv_penalty; 101 int (*sub_motion_search)(struct MpegEncContext *s, 102 int *mx_ptr, int *my_ptr, int dmin, 103 int src_index, int ref_index, 104 int size, int h); 105 } MotionEstContext; 106 107 static inline int ff_h263_round_chroma(int x) 108 { 109 //FIXME static or not? 110 static const uint8_t h263_chroma_roundtab[16] = { 111 // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 112 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 113 }; 114 return h263_chroma_roundtab[x & 0xf] + (x >> 3); 115 } 116 117 /** 118 * Performs one-time initialization of the MotionEstContext. 119 */ 120 int ff_me_init(MotionEstContext *c, struct AVCodecContext *avctx, 121 const struct MECmpContext *mecc, int mpvenc); 122 123 void ff_me_init_pic(struct MpegEncContext *s); 124 125 void ff_estimate_p_frame_motion(struct MpegEncContext *s, int mb_x, int mb_y); 126 void ff_estimate_b_frame_motion(struct MpegEncContext *s, int mb_x, int mb_y); 127 128 int ff_pre_estimate_p_frame_motion(struct MpegEncContext *s, 129 int mb_x, int mb_y); 130 131 int ff_epzs_motion_search(struct MpegEncContext *s, int *mx_ptr, int *my_ptr, 132 int P[10][2], int src_index, int ref_index, 133 const int16_t (*last_mv)[2], int ref_mv_scale, 134 int size, int h); 135 136 int ff_get_mb_score(struct MpegEncContext *s, int mx, int my, int src_index, 137 int ref_index, int size, int h, int add_rate); 138 139 int ff_get_best_fcode(struct MpegEncContext *s, 140 const int16_t (*mv_table)[2], int type); 141 142 void ff_fix_long_p_mvs(struct MpegEncContext *s, int type); 143 void ff_fix_long_mvs(struct MpegEncContext *s, uint8_t *field_select_table, 144 int field_select, int16_t (*mv_table)[2], int f_code, 145 int type, int truncate); 146 147 #endif /* AVCODEC_MOTION_EST_H */