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 "libavutil/file.h"
00026 #include "avcodec.h"
00027 #include "libxvid_internal.h"
00028 //#include "dsputil.h"
00029 #include "mpegvideo.h"
00030 
00031 #undef NDEBUG
00032 #include <assert.h>
00033 
00034 extern unsigned int xvid_debug;
00035 
00036 int ff_xvid_rate_control_init(MpegEncContext *s){
00037     char *tmp_name;
00038     int fd, i;
00039     xvid_plg_create_t xvid_plg_create;
00040     xvid_plugin_2pass2_t xvid_2pass2;
00041 
00042 //xvid_debug=-1;
00043 
00044     fd=av_tempfile("xvidrc.", &tmp_name, 0, s->avctx);
00045     if (fd == -1) {
00046         av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");
00047         return -1;
00048     }
00049 
00050     for(i=0; i<s->rc_context.num_entries; i++){
00051         static const char *frame_types = " ipbs";
00052         char tmp[256];
00053         RateControlEntry *rce;
00054 
00055         rce= &s->rc_context.entry[i];
00056 
00057         snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n",
00058             frame_types[rce->pict_type], (int)lrintf(rce->qscale / FF_QP2LAMBDA), rce->i_count, s->mb_num - rce->i_count - rce->skip_count,
00059             rce->skip_count, (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits+7)/8, (rce->header_bits+rce->mv_bits+7)/8);
00060 
00061 //av_log(NULL, AV_LOG_ERROR, "%s\n", tmp);
00062         write(fd, tmp, strlen(tmp));
00063     }
00064 
00065     close(fd);
00066 
00067     memset(&xvid_2pass2, 0, sizeof(xvid_2pass2));
00068     xvid_2pass2.version= XVID_MAKE_VERSION(1,1,0);
00069     xvid_2pass2.filename= tmp_name;
00070     xvid_2pass2.bitrate= s->avctx->bit_rate;
00071     xvid_2pass2.vbv_size= s->avctx->rc_buffer_size;
00072     xvid_2pass2.vbv_maxrate= s->avctx->rc_max_rate;
00073     xvid_2pass2.vbv_initial= s->avctx->rc_initial_buffer_occupancy;
00074 
00075     memset(&xvid_plg_create, 0, sizeof(xvid_plg_create));
00076     xvid_plg_create.version= XVID_MAKE_VERSION(1,1,0);
00077     xvid_plg_create.fbase= s->avctx->time_base.den;
00078     xvid_plg_create.fincr= s->avctx->time_base.num;
00079     xvid_plg_create.param= &xvid_2pass2;
00080 
00081     if(xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create, &s->rc_context.non_lavc_opaque)<0){
00082         av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n");
00083         return -1;
00084     }
00085     return 0;
00086 }
00087 
00088 float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run){
00089     xvid_plg_data_t xvid_plg_data;
00090 
00091     memset(&xvid_plg_data, 0, sizeof(xvid_plg_data));
00092     xvid_plg_data.version= XVID_MAKE_VERSION(1,1,0);
00093     xvid_plg_data.width = s->width;
00094     xvid_plg_data.height= s->height;
00095     xvid_plg_data.mb_width = s->mb_width;
00096     xvid_plg_data.mb_height= s->mb_height;
00097     xvid_plg_data.fbase= s->avctx->time_base.den;
00098     xvid_plg_data.fincr= s->avctx->time_base.num;
00099     xvid_plg_data.min_quant[0]= s->avctx->qmin;
00100     xvid_plg_data.min_quant[1]= s->avctx->qmin;
00101     xvid_plg_data.min_quant[2]= s->avctx->qmin; //FIXME i/b factor & offset
00102     xvid_plg_data.max_quant[0]= s->avctx->qmax;
00103     xvid_plg_data.max_quant[1]= s->avctx->qmax;
00104     xvid_plg_data.max_quant[2]= s->avctx->qmax; //FIXME i/b factor & offset
00105     xvid_plg_data.bquant_offset = 0; //  100 * s->avctx->b_quant_offset;
00106     xvid_plg_data.bquant_ratio = 100; // * s->avctx->b_quant_factor;
00107 
00108 #if 0
00109     xvid_plg_data.stats.hlength= X
00110 #endif
00111 
00112     if(!s->rc_context.dry_run_qscale){
00113         if(s->picture_number){
00114             xvid_plg_data.length=
00115             xvid_plg_data.stats.length= (s->frame_bits + 7)/8;
00116             xvid_plg_data.frame_num= s->rc_context.last_picture_number;
00117             xvid_plg_data.quant= s->qscale;
00118 
00119             xvid_plg_data.type= s->last_pict_type;
00120             if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_AFTER, &xvid_plg_data, NULL)){
00121                 av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");
00122                 return -1;
00123             }
00124         }
00125         s->rc_context.last_picture_number=
00126         xvid_plg_data.frame_num= s->picture_number;
00127         xvid_plg_data.quant= 0;
00128         if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_BEFORE, &xvid_plg_data, NULL)){
00129             av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");
00130             return -1;
00131         }
00132         s->rc_context.dry_run_qscale= xvid_plg_data.quant;
00133     }
00134     xvid_plg_data.quant= s->rc_context.dry_run_qscale;
00135     if(!dry_run)
00136         s->rc_context.dry_run_qscale= 0;
00137 
00138     if(s->pict_type == AV_PICTURE_TYPE_B) //FIXME this is not exactly identical to xvid
00139         return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor + s->avctx->b_quant_offset;
00140     else
00141         return xvid_plg_data.quant * FF_QP2LAMBDA;
00142 }
00143 
00144 void ff_xvid_rate_control_uninit(MpegEncContext *s){
00145     xvid_plg_destroy_t xvid_plg_destroy;
00146 
00147     xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY, &xvid_plg_destroy, NULL);
00148 }
00149