/*
  * Ratecontrol

  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard

  * Copyright (c) 2002-2004 Michael Niedermayer
  *

  * 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 AVCODEC_RATECONTROL_H
 #define AVCODEC_RATECONTROL_H

 
 /**

  * @file

  * ratecontrol header.
  */
 

 #include <stdio.h>
 #include <stdint.h>

 #include "libavutil/eval.h"

 typedef struct Predictor{
     double coeff;
     double count;
     double decay;
 } Predictor;
 
 typedef struct RateControlEntry{
     int pict_type;
     float qscale;
     int mv_bits;
     int i_tex_bits;
     int p_tex_bits;
     int misc_bits;
     int header_bits;
     uint64_t expected_bits;
     int new_pict_type;
     float new_qscale;

     int64_t mc_mb_var_sum;
     int64_t mb_var_sum;

     int i_count;
     int skip_count;
     int f_code;
     int b_code;
 }RateControlEntry;
 
 /**
  * rate control context.
  */
 typedef struct RateControlContext{
     int num_entries;              ///< number of RateControlEntries
     RateControlEntry *entry;
     double buffer_index;          ///< amount of bits in the video/audio buffer
     Predictor pred[5];
     double short_term_qsum;       ///< sum of recent qscales
     double short_term_qcount;     ///< count of recent qscales
     double pass1_rc_eq_output_sum;///< sum of the output of the rc equation, this is used for normalization
     double pass1_wanted_bits;     ///< bits which should have been outputed by the pass1 code (including complexity init)
     double last_qscale;
     double last_qscale_for[5];    ///< last qscale for a specific pict type, used for max_diff & ipb factor stuff

     int64_t last_mc_mb_var_sum;
     int64_t last_mb_var_sum;

     uint64_t i_cplx_sum[5];
     uint64_t p_cplx_sum[5];
     uint64_t mv_bits_sum[5];
     uint64_t qscale_sum[5];
     int frame_count[5];
     int last_non_b_pict_type;
 
     void *non_lavc_opaque;        ///< context for non lavc rc code (for example xvid)
     float dry_run_qscale;         ///< for xvid rc
     int last_picture_number;      ///< for xvid rc

     AVExpr * rc_eq_eval;

 }RateControlContext;
 
 struct MpegEncContext;
 
 /* rate control */
 int ff_rate_control_init(struct MpegEncContext *s);
 float ff_rate_estimate_qscale(struct MpegEncContext *s, int dry_run);
 void ff_write_pass1_stats(struct MpegEncContext *s);
 void ff_rate_control_uninit(struct MpegEncContext *s);
 int ff_vbv_update(struct MpegEncContext *s, int frame_size);
 void ff_get_2pass_fcode(struct MpegEncContext *s);
 
 int ff_xvid_rate_control_init(struct MpegEncContext *s);
 void ff_xvid_rate_control_uninit(struct MpegEncContext *s);
 float ff_xvid_rate_estimate_qscale(struct MpegEncContext *s, int dry_run);
 

 #endif /* AVCODEC_RATECONTROL_H */