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
29
31
32 #if ARCH_IA64 // Limit static arrays to avoid gcc failing "short data segment overflowed"
33 #define MAX_MV 1024
34 #else
36 #endif
37 #define MAX_DMV (2*MAX_MV)
38 #define ME_MAP_SIZE 64
39
43
44 /**
45 * Motion estimation context.
46 */
49 int skip;
///< set if ME is skipped for the current MB
53 * the ME does not need to malloc/free. */
58 uint32_t *
map;
///< map to avoid duplicate evaluations
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. */
84 /* temp variables for picture complexity calculation */
88
96 int *mx_ptr, int *my_ptr, int dmin,
97 int src_index, int ref_index,
100
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
112
115
118
120 int P[10][2],
int src_index,
int ref_index,
123
125 int ref_index,
int size,
int h,
int add_rate);
126
128 int16_t (*mv_table)[2],
int type);
129
133 int type,
int truncate);
134
135 #endif /* AVCODEC_MOTION_EST_H */
uint8_t * scratchpad
data area for the ME algo, so that the ME does not need to malloc/free.
int skip
set if ME is skipped for the current MB
int last_mv[2][2][2]
last MV, used for MV prediction in MPEG1 & B-frame MPEG4
int pre_pass
= 1 for the pre pass
int ff_epzs_motion_search(struct MpegEncContext *s, int *mx_ptr, int *my_ptr, int P[10][2], int src_index, int ref_index, int16_t(*last_mv)[2], int ref_mv_scale, int size, int h)
uint8_t * current_mv_penalty
void(* qpel_mc_func)(uint8_t *dst, const uint8_t *src, ptrdiff_t stride)
uint32_t * score_map
map to store the scores
uint8_t(* mv_penalty)[MAX_DMV *2+1]
bit amount needed to encode a MV
op_pixels_func(* hpel_put)[4]
int ff_get_mb_score(struct MpegEncContext *s, int mx, int my, int src_index, int ref_index, int size, int h, int add_rate)
int ff_get_best_fcode(struct MpegEncContext *s, int16_t(*mv_table)[2], int type)
Motion estimation context.
qpel_mc_func(* qpel_put)[16]
op_pixels_func(* hpel_avg)[4]
void ff_fix_long_p_mvs(struct MpegEncContext *s)
int ff_pre_estimate_p_frame_motion(struct MpegEncContext *s, int mb_x, int mb_y)
void ff_estimate_p_frame_motion(struct MpegEncContext *s, int mb_x, int mb_y)
void(* op_pixels_func)(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
int penalty_factor
an estimate of the bits required to code a given mv value, e.g.
Libavcodec external API header.
main external API structure.
static int ff_h263_round_chroma(int x)
int f_code
forward MV resolution
void ff_fix_long_mvs(struct MpegEncContext *s, uint8_t *field_select_table, int field_select, int16_t(*mv_table)[2], int f_code, int type, int truncate)
qpel_mc_func(* qpel_avg)[16]
int64_t mc_mb_var_sum_temp
int direct_basis_mv[4][2]
int ff_init_me(struct MpegEncContext *s)
int co_located_mv[4][2]
mv from last P-frame for direct mode ME
uint32_t * map
map to avoid duplicate evaluations
void ff_estimate_b_frame_motion(struct MpegEncContext *s, int mb_x, int mb_y)
int(* sub_motion_search)(struct MpegEncContext *s, int *mx_ptr, int *my_ptr, int dmin, int src_index, int ref_index, int size, int h)