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https://github.com/FFmpeg/FFmpeg.git
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5b4da8a38a
Fixes out of array read Found-by: Tyson Smith <twsmith@mozilla.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
132 lines
4.5 KiB
C
132 lines
4.5 KiB
C
/*
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* Motion estimation
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_MOTIONEST_H
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#define AVCODEC_MOTIONEST_H
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#include <stdint.h>
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#include "avcodec.h"
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#include "hpeldsp.h"
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#include "qpeldsp.h"
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struct MpegEncContext;
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#define MAX_MV 4096
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#define MAX_DMV (2*MAX_MV)
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#define ME_MAP_SIZE 64
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#define FF_ME_ZERO 0
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#define FF_ME_EPZS 1
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#define FF_ME_XONE 2
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/**
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* Motion estimation context.
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*/
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typedef struct MotionEstContext {
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AVCodecContext *avctx;
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int skip; ///< set if ME is skipped for the current MB
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int co_located_mv[4][2]; ///< mv from last P-frame for direct mode ME
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int direct_basis_mv[4][2];
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uint8_t *scratchpad; /**< data area for the ME algo, so that
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* the ME does not need to malloc/free. */
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uint8_t *best_mb;
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uint8_t *temp_mb[2];
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uint8_t *temp;
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int best_bits;
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uint32_t *map; ///< map to avoid duplicate evaluations
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uint32_t *score_map; ///< map to store the scores
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unsigned map_generation;
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int pre_penalty_factor;
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int penalty_factor; /**< an estimate of the bits required to
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* code a given mv value, e.g. (1,0) takes
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* more bits than (0,0). We have to
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* estimate whether any reduction in
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* residual is worth the extra bits. */
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int sub_penalty_factor;
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int mb_penalty_factor;
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int flags;
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int sub_flags;
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int mb_flags;
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int pre_pass; ///< = 1 for the pre pass
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int dia_size;
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int xmin;
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int xmax;
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int ymin;
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int ymax;
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int pred_x;
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int pred_y;
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uint8_t *src[4][4];
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uint8_t *ref[4][4];
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int stride;
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int uvstride;
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/* temp variables for picture complexity calculation */
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int64_t mc_mb_var_sum_temp;
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int64_t mb_var_sum_temp;
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int scene_change_score;
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op_pixels_func(*hpel_put)[4];
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op_pixels_func(*hpel_avg)[4];
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qpel_mc_func(*qpel_put)[16];
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qpel_mc_func(*qpel_avg)[16];
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uint8_t (*mv_penalty)[MAX_DMV * 2 + 1]; ///< bit amount needed to encode a MV
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uint8_t *current_mv_penalty;
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int (*sub_motion_search)(struct MpegEncContext *s,
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int *mx_ptr, int *my_ptr, int dmin,
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int src_index, int ref_index,
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int size, int h);
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} MotionEstContext;
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static inline int ff_h263_round_chroma(int x)
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{
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//FIXME static or not?
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static const uint8_t h263_chroma_roundtab[16] = {
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// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
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0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
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};
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return h263_chroma_roundtab[x & 0xf] + (x >> 3);
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}
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int ff_init_me(struct MpegEncContext *s);
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void ff_estimate_p_frame_motion(struct MpegEncContext *s, int mb_x, int mb_y);
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void ff_estimate_b_frame_motion(struct MpegEncContext *s, int mb_x, int mb_y);
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int ff_pre_estimate_p_frame_motion(struct MpegEncContext *s,
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int mb_x, int mb_y);
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int ff_epzs_motion_search(struct MpegEncContext *s, int *mx_ptr, int *my_ptr,
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int P[10][2], int src_index, int ref_index,
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int16_t (*last_mv)[2], int ref_mv_scale, int size,
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int h);
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int ff_get_mb_score(struct MpegEncContext *s, int mx, int my, int src_index,
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int ref_index, int size, int h, int add_rate);
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int ff_get_best_fcode(struct MpegEncContext *s,
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int16_t (*mv_table)[2], int type);
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void ff_fix_long_p_mvs(struct MpegEncContext *s);
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void ff_fix_long_mvs(struct MpegEncContext *s, uint8_t *field_select_table,
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int field_select, int16_t (*mv_table)[2], int f_code,
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int type, int truncate);
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#endif /* AVCODEC_MOTIONEST_H */
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