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  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 "config.h"
  24. #include <xvid.h>
  25. #include <unistd.h>
  26. #include "libavutil/attributes.h"
  27. #include "libavutil/file.h"
  28. #include "avcodec.h"
  29. #include "libxvid.h"
  30. #include "mpegvideo.h"
  31.  
  32. #undef NDEBUG
  33. #include <assert.h>
  34.  
  35. av_cold int ff_xvid_rate_control_init(MpegEncContext *s)
  36. {
  37.     char *tmp_name;
  38.     int fd, i;
  39.     xvid_plg_create_t xvid_plg_create = { 0 };
  40.     xvid_plugin_2pass2_t xvid_2pass2  = { 0 };
  41.  
  42.     fd=av_tempfile("xvidrc.", &tmp_name, 0, s->avctx);
  43.     if (fd == -1) {
  44.         av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");
  45.         return -1;
  46.     }
  47.  
  48.     for(i=0; i<s->rc_context.num_entries; i++){
  49.         static const char frame_types[] = " ipbs";
  50.         char tmp[256];
  51.         RateControlEntry *rce;
  52.  
  53.         rce= &s->rc_context.entry[i];
  54.  
  55.         snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n",
  56.             frame_types[rce->pict_type], (int)lrintf(rce->qscale / FF_QP2LAMBDA), rce->i_count, s->mb_num - rce->i_count - rce->skip_count,
  57.             rce->skip_count, (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits+7)/8, (rce->header_bits+rce->mv_bits+7)/8);
  58.  
  59.         if (write(fd, tmp, strlen(tmp)) < 0) {
  60.             av_log(NULL, AV_LOG_ERROR, "Error %s writing 2pass logfile\n", strerror(errno));
  61.             av_free(tmp_name);
  62.             close(fd);
  63.             return AVERROR(errno);
  64.         }
  65.     }
  66.  
  67.     close(fd);
  68.  
  69.     xvid_2pass2.version= XVID_MAKE_VERSION(1,1,0);
  70.     xvid_2pass2.filename= tmp_name;
  71.     xvid_2pass2.bitrate= s->avctx->bit_rate;
  72.     xvid_2pass2.vbv_size= s->avctx->rc_buffer_size;
  73.     xvid_2pass2.vbv_maxrate= s->avctx->rc_max_rate;
  74.     xvid_2pass2.vbv_initial= s->avctx->rc_initial_buffer_occupancy;
  75.  
  76.     xvid_plg_create.version= XVID_MAKE_VERSION(1,1,0);
  77.     xvid_plg_create.fbase= s->avctx->time_base.den;
  78.     xvid_plg_create.fincr= s->avctx->time_base.num;
  79.     xvid_plg_create.param= &xvid_2pass2;
  80.  
  81.     if(xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create, &s->rc_context.non_lavc_opaque)<0){
  82.         av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n");
  83.         return -1;
  84.     }
  85.     return 0;
  86. }
  87.  
  88. float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run){
  89.     xvid_plg_data_t xvid_plg_data = { 0 };
  90.  
  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(!s->rc_context.dry_run_qscale){
  108.         if(s->picture_number){
  109.             xvid_plg_data.length=
  110.             xvid_plg_data.stats.length= (s->frame_bits + 7)/8;
  111.             xvid_plg_data.frame_num= s->rc_context.last_picture_number;
  112.             xvid_plg_data.quant= s->qscale;
  113.  
  114.             xvid_plg_data.type= s->last_pict_type;
  115.             if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_AFTER, &xvid_plg_data, NULL)){
  116.                 av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");
  117.                 return -1;
  118.             }
  119.         }
  120.         s->rc_context.last_picture_number=
  121.         xvid_plg_data.frame_num= s->picture_number;
  122.         xvid_plg_data.quant= 0;
  123.         if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_BEFORE, &xvid_plg_data, NULL)){
  124.             av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");
  125.             return -1;
  126.         }
  127.         s->rc_context.dry_run_qscale= xvid_plg_data.quant;
  128.     }
  129.     xvid_plg_data.quant= s->rc_context.dry_run_qscale;
  130.     if(!dry_run)
  131.         s->rc_context.dry_run_qscale= 0;
  132.  
  133.     if(s->pict_type == AV_PICTURE_TYPE_B) //FIXME this is not exactly identical to xvid
  134.         return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor + s->avctx->b_quant_offset;
  135.     else
  136.         return xvid_plg_data.quant * FF_QP2LAMBDA;
  137. }
  138.  
  139. av_cold void ff_xvid_rate_control_uninit(MpegEncContext *s)
  140. {
  141.     xvid_plg_destroy_t xvid_plg_destroy;
  142.  
  143.     xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY, &xvid_plg_destroy, NULL);
  144. }
  145.