libavcodec/xvid_rc.c

   1 /*
   2  * xvid Rate control wrapper for lavc video encoders
   3  *
   4  * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include <xvid.h>
  24 #include <unistd.h>
  25 #include "avcodec.h"
  26 #include "xvid_internal.h"
  27 //#include "dsputil.h"
  28 #include "mpegvideo.h"
  29
  30 #undef NDEBUG
  31 #include <assert.h>
  32
  33 extern unsigned int xvid_debug;
  34
  35 int ff_xvid_rate_control_init(MpegEncContext *s){
  36     char *tmp_name;
  37     int fd, i;
  38     xvid_plg_create_t xvid_plg_create;
  39     xvid_plugin_2pass2_t xvid_2pass2;
  40
  41 //xvid_debug=-1;
  42
  43     fd=av_tempfile("xvidrc.", &tmp_name);
  44     if (fd == -1) {
  45         av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");
  46         return -1;
  47     }
  48
  49     for(i=0; i<s->rc_context.num_entries; i++){
  50         static const char *frame_types = " ipbs";
  51         char tmp[256];
  52         RateControlEntry *rce;
  53
  54         rce= &s->rc_context.entry[i];
  55
  56         snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n",
  57             frame_types[rce->pict_type], (int)lrintf(rce->qscale / FF_QP2LAMBDA), rce->i_count, s->mb_num - rce->i_count - rce->skip_count,
  58             rce->skip_count, (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits+7)/8, (rce->header_bits+rce->mv_bits+7)/8);
  59
  60 //av_log(NULL, AV_LOG_ERROR, "%s\n", tmp);
  61         write(fd, tmp, strlen(tmp));
  62     }
  63
  64     close(fd);
  65
  66     memset(&xvid_2pass2, 0, sizeof(xvid_2pass2));
  67     xvid_2pass2.version= XVID_MAKE_VERSION(1,1,0);
  68     xvid_2pass2.filename= tmp_name;
  69     xvid_2pass2.bitrate= s->avctx->bit_rate;
  70     xvid_2pass2.vbv_size= s->avctx->rc_buffer_size;
  71     xvid_2pass2.vbv_maxrate= s->avctx->rc_max_rate;
  72     xvid_2pass2.vbv_initial= s->avctx->rc_initial_buffer_occupancy;
  73
  74     memset(&xvid_plg_create, 0, sizeof(xvid_plg_create));
  75     xvid_plg_create.version= XVID_MAKE_VERSION(1,1,0);
  76     xvid_plg_create.fbase= s->avctx->time_base.den;
  77     xvid_plg_create.fincr= s->avctx->time_base.num;
  78     xvid_plg_create.param= &xvid_2pass2;
  79
  80     if(xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create, &s->rc_context.non_lavc_opaque)<0){
  81         av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n");
  82         return -1;
  83     }
  84     return 0;
  85 }
  86
  87 float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run){
  88     xvid_plg_data_t xvid_plg_data;
  89
  90     memset(&xvid_plg_data, 0, sizeof(xvid_plg_data));
  91     xvid_plg_data.version= XVID_MAKE_VERSION(1,1,0);
  92     xvid_plg_data.width = s->width;
  93     xvid_plg_data.height= s->height;
  94     xvid_plg_data.mb_width = s->mb_width;
  95     xvid_plg_data.mb_height= s->mb_height;
  96     xvid_plg_data.fbase= s->avctx->time_base.den;
  97     xvid_plg_data.fincr= s->avctx->time_base.num;
  98     xvid_plg_data.min_quant[0]= s->avctx->qmin;
  99     xvid_plg_data.min_quant[1]= s->avctx->qmin;
 100     xvid_plg_data.min_quant[2]= s->avctx->qmin; //FIXME i/b factor & offset
 101     xvid_plg_data.max_quant[0]= s->avctx->qmax;
 102     xvid_plg_data.max_quant[1]= s->avctx->qmax;
 103     xvid_plg_data.max_quant[2]= s->avctx->qmax; //FIXME i/b factor & offset
 104     xvid_plg_data.bquant_offset = 0; //  100 * s->avctx->b_quant_offset;
 105     xvid_plg_data.bquant_ratio = 100; // * s->avctx->b_quant_factor;
 106
 107 #if 0
 108     xvid_plg_data.stats.hlength= X
 109 #endif
 110
 111     if(!s->rc_context.dry_run_qscale){
 112         if(s->picture_number){
 113             xvid_plg_data.length=
 114             xvid_plg_data.stats.length= (s->frame_bits + 7)/8;
 115             xvid_plg_data.frame_num= s->rc_context.last_picture_number;
 116             xvid_plg_data.quant= s->qscale;
 117
 118             xvid_plg_data.type= s->last_pict_type;
 119             if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_AFTER, &xvid_plg_data, NULL)){
 120                 av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");
 121                 return -1;
 122             }
 123         }
 124         s->rc_context.last_picture_number=
 125         xvid_plg_data.frame_num= s->picture_number;
 126         xvid_plg_data.quant= 0;
 127         if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_BEFORE, &xvid_plg_data, NULL)){
 128             av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");
 129             return -1;
 130         }
 131         s->rc_context.dry_run_qscale= xvid_plg_data.quant;
 132     }
 133     xvid_plg_data.quant= s->rc_context.dry_run_qscale;
 134     if(!dry_run)
 135         s->rc_context.dry_run_qscale= 0;
 136
 137     if(s->pict_type == B_TYPE) //FIXME this is not exactly identical to xvid
 138         return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor + s->avctx->b_quant_offset;
 139     else
 140         return xvid_plg_data.quant * FF_QP2LAMBDA;
 141 }
 142
 143 void ff_xvid_rate_control_uninit(MpegEncContext *s){
 144     xvid_plg_destroy_t xvid_plg_destroy;
 145
 146     xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY, &xvid_plg_destroy, NULL);
 147 }
 148