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* Motion estimation
* This file is part of FFmpeg.
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#include <stdint.h>
#include "avcodec.h"
#include "hpeldsp.h"
#include "qpeldsp.h"
struct MpegEncContext;
#if ARCH_IA64 // Limit static arrays to avoid gcc failing "short data segment overflowed"
#define MAX_MV 1024
#define MAX_MV 4096
#define MAX_DMV (2*MAX_MV)
#define ME_MAP_SIZE 64
#define FF_ME_ZERO 0
#define FF_ME_EPZS 1
#define FF_ME_XONE 2
* Motion estimation context.
typedef struct MotionEstContext {
AVCodecContext *avctx;
int skip; ///< set if ME is skipped for the current MB
int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
int direct_basis_mv[4][2];
uint8_t *scratchpad; /**< data area for the ME algo, so that
* the ME does not need to malloc/free. */
uint8_t *best_mb;
uint8_t *temp_mb[2];
uint8_t *temp;
int best_bits;
uint32_t *map; ///< map to avoid duplicate evaluations
uint32_t *score_map; ///< map to store the scores
unsigned map_generation;
int pre_penalty_factor;
int penalty_factor; /**< an estimate of the bits required to
* code a given mv value, e.g. (1,0) takes
* more bits than (0,0). We have to
* estimate whether any reduction in
* residual is worth the extra bits. */
int sub_penalty_factor;
int mb_penalty_factor;
int flags;
int sub_flags;
int mb_flags;
int pre_pass; ///< = 1 for the pre pass
int dia_size;
int xmin;
int xmax;
int ymin;
int ymax;
int pred_x;
int pred_y;
uint8_t *src[4][4];
uint8_t *ref[4][4];
int stride;
int uvstride;
/* temp variables for picture complexity calculation */
int64_t mc_mb_var_sum_temp;
int64_t mb_var_sum_temp;
int scene_change_score;
uint8_t (*mv_penalty)[MAX_DMV * 2 + 1]; ///< bit amount needed to encode a MV
uint8_t *current_mv_penalty;
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);
} MotionEstContext;
static inline int ff_h263_round_chroma(int x)
//FIXME static or not?
static const uint8_t h263_chroma_roundtab[16] = {
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
return h263_chroma_roundtab[x & 0xf] + (x >> 3);
int ff_init_me(struct MpegEncContext *s);
void ff_estimate_p_frame_motion(struct MpegEncContext *s, int mb_x, int mb_y);
void ff_estimate_b_frame_motion(struct MpegEncContext *s, int mb_x, int mb_y);
int ff_pre_estimate_p_frame_motion(struct MpegEncContext *s,
int mb_x, int mb_y);
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);
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);
void ff_fix_long_p_mvs(struct MpegEncContext *s);
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);