/***************************************************************************** * ratecontrol.c: h264 encoder library (Rate Control) ***************************************************************************** * Copyright (C) 2003 Laurent Aimar * $Id: ratecontrol.c,v 1.2 2004/03/28 09:21:44 fenrir Exp $ * * Authors: Laurent Aimar <fenrir@via.ecp.fr> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA. *****************************************************************************/#include <stdlib.h>#include <stdio.h>#include <string.h>#include <stdint.h>#include "../core/common.h"#include "ratecontrol.h"x264_ratecontrol_t *x264_ratecontrol_new( x264_param_t *param ){    x264_ratecontrol_t *rc = x264_malloc( sizeof( x264_ratecontrol_t ) );    rc->fps = param->f_fps > 0.1 ? param->f_fps : 25.0;    rc->i_iframe = param->i_iframe;    rc->i_bitrate = param->i_bitrate * 1000;    rc->i_qp_last = 26;    rc->i_qp      = param->i_qp_constant;    rc->i_frames  = 0;    rc->i_size    = 0;    return rc;}void x264_ratecontrol_delete( x264_ratecontrol_t *rc ){    x264_free( rc );}void x264_ratecontrol_start( x264_ratecontrol_t *rc, int i_slice_type ){    rc->i_slice_type = i_slice_type;}int  x264_ratecontrol_qp( x264_ratecontrol_t *rc ){    return x264_clip3( rc->i_qp, 1, 51 );}void x264_ratecontrol_end( x264_ratecontrol_t *rc, int bits ){    return;#if 0    int i_avg;    int i_target = rc->i_bitrate / rc->fps;    int i_qp = rc->i_qp;    rc->i_qp_last = rc->i_qp;    rc->i_frames++;    rc->i_size += bits / 8;    i_avg = 8 * rc->i_size / rc->i_frames;    if( rc->i_slice_type == SLICE_TYPE_I )    {        i_target = i_target * 20 / 10;    }    if( i_avg > i_target * 11 / 10 )    {        i_qp = rc->i_qp + ( i_avg / i_target - 1 );    }    else if( i_avg < i_target * 9 / 10 )    {        i_qp = rc->i_qp - ( i_target / i_avg - 1 );    }    rc->i_qp = x264_clip3( i_qp, rc->i_qp_last - 2, rc->i_qp_last + 2 );#endif}