FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/motion_est.h
Date: 2021-09-26 18:22:30
Exec Total Coverage
Lines: 2 2 100.0%
Branches: 0 0 -%

Line Branch Exec Source
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 const uint8_t (*mv_penalty)[MAX_DMV * 2 + 1]; ///< bit amount needed to encode a MV
94 const 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 1430684 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 1430684 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, int type);
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