blob: 3b3a8d7341ce4dd365076b96fb3a26a03ea976d2
| 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 "qpeldsp.h" |
| 29 | |
| 30 | struct MpegEncContext; |
| 31 | |
| 32 | #if ARCH_IA64 // Limit static arrays to avoid gcc failing "short data segment overflowed" |
| 33 | #define MAX_MV 1024 |
| 34 | #else |
| 35 | #define MAX_MV 4096 |
| 36 | #endif |
| 37 | #define MAX_DMV (2*MAX_MV) |
| 38 | #define ME_MAP_SIZE 64 |
| 39 | |
| 40 | #define FF_ME_ZERO 0 |
| 41 | #define FF_ME_EPZS 1 |
| 42 | #define FF_ME_XONE 2 |
| 43 | |
| 44 | /** |
| 45 | * Motion estimation context. |
| 46 | */ |
| 47 | typedef struct MotionEstContext { |
| 48 | AVCodecContext *avctx; |
| 49 | int skip; ///< set if ME is skipped for the current MB |
| 50 | int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME |
| 51 | int direct_basis_mv[4][2]; |
| 52 | uint8_t *scratchpad; /**< data area for the ME algo, so that |
| 53 | * the ME does not need to malloc/free. */ |
| 54 | uint8_t *best_mb; |
| 55 | uint8_t *temp_mb[2]; |
| 56 | uint8_t *temp; |
| 57 | int best_bits; |
| 58 | uint32_t *map; ///< map to avoid duplicate evaluations |
| 59 | uint32_t *score_map; ///< map to store the scores |
| 60 | unsigned map_generation; |
| 61 | int pre_penalty_factor; |
| 62 | int penalty_factor; /**< an estimate of the bits required to |
| 63 | * code a given mv value, e.g. (1,0) takes |
| 64 | * more bits than (0,0). We have to |
| 65 | * estimate whether any reduction in |
| 66 | * residual is worth the extra bits. */ |
| 67 | int sub_penalty_factor; |
| 68 | int mb_penalty_factor; |
| 69 | int flags; |
| 70 | int sub_flags; |
| 71 | int mb_flags; |
| 72 | int pre_pass; ///< = 1 for the pre pass |
| 73 | int dia_size; |
| 74 | int xmin; |
| 75 | int xmax; |
| 76 | int ymin; |
| 77 | int ymax; |
| 78 | int pred_x; |
| 79 | int pred_y; |
| 80 | uint8_t *src[4][4]; |
| 81 | uint8_t *ref[4][4]; |
| 82 | int stride; |
| 83 | int uvstride; |
| 84 | /* temp variables for picture complexity calculation */ |
| 85 | int64_t mc_mb_var_sum_temp; |
| 86 | int64_t mb_var_sum_temp; |
| 87 | int scene_change_score; |
| 88 | |
| 89 | op_pixels_func(*hpel_put)[4]; |
| 90 | op_pixels_func(*hpel_avg)[4]; |
| 91 | qpel_mc_func(*qpel_put)[16]; |
| 92 | qpel_mc_func(*qpel_avg)[16]; |
| 93 | uint8_t (*mv_penalty)[MAX_DMV * 2 + 1]; ///< bit amount needed to encode a MV |
| 94 | uint8_t *current_mv_penalty; |
| 95 | int (*sub_motion_search)(struct MpegEncContext *s, |
| 96 | int *mx_ptr, int *my_ptr, int dmin, |
| 97 | int src_index, int ref_index, |
| 98 | int size, int h); |
| 99 | } MotionEstContext; |
| 100 | |
| 101 | static inline int ff_h263_round_chroma(int x) |
| 102 | { |
| 103 | //FIXME static or not? |
| 104 | static const uint8_t h263_chroma_roundtab[16] = { |
| 105 | // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
| 106 | 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, |
| 107 | }; |
| 108 | return h263_chroma_roundtab[x & 0xf] + (x >> 3); |
| 109 | } |
| 110 | |
| 111 | int ff_init_me(struct MpegEncContext *s); |
| 112 | |
| 113 | void ff_estimate_p_frame_motion(struct MpegEncContext *s, int mb_x, int mb_y); |
| 114 | void ff_estimate_b_frame_motion(struct MpegEncContext *s, int mb_x, int mb_y); |
| 115 | |
| 116 | int ff_pre_estimate_p_frame_motion(struct MpegEncContext *s, |
| 117 | int mb_x, int mb_y); |
| 118 | |
| 119 | int ff_epzs_motion_search(struct MpegEncContext *s, int *mx_ptr, int *my_ptr, |
| 120 | int P[10][2], int src_index, int ref_index, |
| 121 | int16_t (*last_mv)[2], int ref_mv_scale, int size, |
| 122 | int h); |
| 123 | |
| 124 | int ff_get_mb_score(struct MpegEncContext *s, int mx, int my, int src_index, |
| 125 | int ref_index, int size, int h, int add_rate); |
| 126 | |
| 127 | int ff_get_best_fcode(struct MpegEncContext *s, |
| 128 | int16_t (*mv_table)[2], int type); |
| 129 | |
| 130 | void ff_fix_long_p_mvs(struct MpegEncContext *s); |
| 131 | void ff_fix_long_mvs(struct MpegEncContext *s, uint8_t *field_select_table, |
| 132 | int field_select, int16_t (*mv_table)[2], int f_code, |
| 133 | int type, int truncate); |
| 134 | |
| 135 | #endif /* AVCODEC_MOTION_EST_H */ |
| 136 |