mirror of https://github.com/FFmpeg/FFmpeg.git
Vittorio Giovara
10 years ago
parent
b2b766914a
commit
149fa0b7ac
3 changed files with 130 additions and 87 deletions
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/*
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* Motion estimation |
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* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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 2048 |
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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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int mc_mb_var_sum_temp; |
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int 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_MV * 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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extern const uint8_t ff_aic_dc_scale_table[32]; |
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extern const uint8_t ff_h263_chroma_qscale_table[32]; |
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#endif /* AVCODEC_MOTIONEST_H */ |
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