framerate.h

/*
 * 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
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * 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
 */

#ifndef AVFILTER_FRAMERATE_H
#define AVFILTER_FRAMERATE_H

#include "libavutil/pixelutils.h"
#include "avfilter.h"

#define BLEND_FUNC_PARAMS const uint8_t *src1, ptrdiff_t src1_linesize, \
                          const uint8_t *src2, ptrdiff_t src2_linesize, \
                          uint8_t *dst, ptrdiff_t dst_linesize, \
                          ptrdiff_t width, ptrdiff_t height, \
                          int factor1, int factor2, int half

#define BLEND_FACTOR_DEPTH8   7
#define BLEND_FACTOR_DEPTH16 15

typedef void (*blend_func)(BLEND_FUNC_PARAMS);

typedef struct FrameRateContext {
    const AVClass *class;
    // parameters
    AVRational dest_frame_rate;         
    int flags;                          
    double scene_score;                 
    int interp_start;                   
    int interp_end;                     

    int line_size[4];                   
    int vsub;

    AVRational srce_time_base;          
    AVRational dest_time_base;          

    av_pixelutils_sad_fn sad;           
    double prev_mafd;                   

    int blend_factor_max;
    int bitdepth;
    AVFrame *work;

    AVFrame *f0;                        
    AVFrame *f1;                        
    int64_t pts0;                       
    int64_t pts1;                       
    int64_t delta;                      
    double score;                       
    int flush;                          
    int64_t start_pts;                  
    int64_t n;                          

    blend_func blend;
} FrameRateContext;

void ff_framerate_init(FrameRateContext *s);
void ff_framerate_init_x86(FrameRateContext *s);

#endif /* AVFILTER_FRAMERATE_H */