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libavcodec/libxvid_rc.c

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00001 /*
00002  * Xvid rate control wrapper for lavc video encoders
00003  *
00004  * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 #include <xvid.h>
00024 #include <unistd.h>
00025 #include "avcodec.h"
00026 #include "libxvid_internal.h"
00027 //#include "dsputil.h"
00028 #include "mpegvideo.h"
00029 
00030 #undef NDEBUG
00031 #include <assert.h>
00032 
00033 extern unsigned int xvid_debug;
00034 
00035 int ff_xvid_rate_control_init(MpegEncContext *s){
00036     char *tmp_name;
00037     int fd, i;
00038     xvid_plg_create_t xvid_plg_create;
00039     xvid_plugin_2pass2_t xvid_2pass2;
00040 
00041 //xvid_debug=-1;
00042 
00043     fd=av_tempfile("xvidrc.", &tmp_name);
00044     if (fd == -1) {
00045         av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");
00046         return -1;
00047     }
00048 
00049     for(i=0; i<s->rc_context.num_entries; i++){
00050         static const char *frame_types = " ipbs";
00051         char tmp[256];
00052         RateControlEntry *rce;
00053 
00054         rce= &s->rc_context.entry[i];
00055 
00056         snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n",
00057             frame_types[rce->pict_type], (int)lrintf(rce->qscale / FF_QP2LAMBDA), rce->i_count, s->mb_num - rce->i_count - rce->skip_count,
00058             rce->skip_count, (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits+7)/8, (rce->header_bits+rce->mv_bits+7)/8);
00059 
00060 //av_log(NULL, AV_LOG_ERROR, "%s\n", tmp);
00061         write(fd, tmp, strlen(tmp));
00062     }
00063 
00064     close(fd);
00065 
00066     memset(&xvid_2pass2, 0, sizeof(xvid_2pass2));
00067     xvid_2pass2.version= XVID_MAKE_VERSION(1,1,0);
00068     xvid_2pass2.filename= tmp_name;
00069     xvid_2pass2.bitrate= s->avctx->bit_rate;
00070     xvid_2pass2.vbv_size= s->avctx->rc_buffer_size;
00071     xvid_2pass2.vbv_maxrate= s->avctx->rc_max_rate;
00072     xvid_2pass2.vbv_initial= s->avctx->rc_initial_buffer_occupancy;
00073 
00074     memset(&xvid_plg_create, 0, sizeof(xvid_plg_create));
00075     xvid_plg_create.version= XVID_MAKE_VERSION(1,1,0);
00076     xvid_plg_create.fbase= s->avctx->time_base.den;
00077     xvid_plg_create.fincr= s->avctx->time_base.num;
00078     xvid_plg_create.param= &xvid_2pass2;
00079 
00080     if(xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create, &s->rc_context.non_lavc_opaque)<0){
00081         av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n");
00082         return -1;
00083     }
00084     return 0;
00085 }
00086 
00087 float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run){
00088     xvid_plg_data_t xvid_plg_data;
00089 
00090     memset(&xvid_plg_data, 0, sizeof(xvid_plg_data));
00091     xvid_plg_data.version= XVID_MAKE_VERSION(1,1,0);
00092     xvid_plg_data.width = s->width;
00093     xvid_plg_data.height= s->height;
00094     xvid_plg_data.mb_width = s->mb_width;
00095     xvid_plg_data.mb_height= s->mb_height;
00096     xvid_plg_data.fbase= s->avctx->time_base.den;
00097     xvid_plg_data.fincr= s->avctx->time_base.num;
00098     xvid_plg_data.min_quant[0]= s->avctx->qmin;
00099     xvid_plg_data.min_quant[1]= s->avctx->qmin;
00100     xvid_plg_data.min_quant[2]= s->avctx->qmin; //FIXME i/b factor & offset
00101     xvid_plg_data.max_quant[0]= s->avctx->qmax;
00102     xvid_plg_data.max_quant[1]= s->avctx->qmax;
00103     xvid_plg_data.max_quant[2]= s->avctx->qmax; //FIXME i/b factor & offset
00104     xvid_plg_data.bquant_offset = 0; //  100 * s->avctx->b_quant_offset;
00105     xvid_plg_data.bquant_ratio = 100; // * s->avctx->b_quant_factor;
00106 
00107 #if 0
00108     xvid_plg_data.stats.hlength= X
00109 #endif
00110 
00111     if(!s->rc_context.dry_run_qscale){
00112         if(s->picture_number){
00113             xvid_plg_data.length=
00114             xvid_plg_data.stats.length= (s->frame_bits + 7)/8;
00115             xvid_plg_data.frame_num= s->rc_context.last_picture_number;
00116             xvid_plg_data.quant= s->qscale;
00117 
00118             xvid_plg_data.type= s->last_pict_type;
00119             if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_AFTER, &xvid_plg_data, NULL)){
00120                 av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");
00121                 return -1;
00122             }
00123         }
00124         s->rc_context.last_picture_number=
00125         xvid_plg_data.frame_num= s->picture_number;
00126         xvid_plg_data.quant= 0;
00127         if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_BEFORE, &xvid_plg_data, NULL)){
00128             av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");
00129             return -1;
00130         }
00131         s->rc_context.dry_run_qscale= xvid_plg_data.quant;
00132     }
00133     xvid_plg_data.quant= s->rc_context.dry_run_qscale;
00134     if(!dry_run)
00135         s->rc_context.dry_run_qscale= 0;
00136 
00137     if(s->pict_type == FF_B_TYPE) //FIXME this is not exactly identical to xvid
00138         return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor + s->avctx->b_quant_offset;
00139     else
00140         return xvid_plg_data.quant * FF_QP2LAMBDA;
00141 }
00142 
00143 void ff_xvid_rate_control_uninit(MpegEncContext *s){
00144     xvid_plg_destroy_t xvid_plg_destroy;
00145 
00146     xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY, &xvid_plg_destroy, NULL);
00147 }
00148 

Generated on Fri Sep 16 2011 17:17:38 for FFmpeg by  doxygen 1.7.1