[svn] / branches / dev-api-4 / xvidcore / src / plugins / plugin_2pass2.c Repository:
ViewVC logotype

Diff of /branches/dev-api-4/xvidcore/src/plugins/plugin_2pass2.c

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 1049, Thu May 29 12:38:44 2003 UTC revision 1161, Wed Oct 1 23:23:01 2003 UTC
# Line 25  Line 25 
25   * along with this program; if not, write to the Free Software   * along with this program; if not, write to the Free Software
26   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
27   *   *
28   * $Id: plugin_2pass2.c,v 1.1.2.16 2003-05-29 12:38:44 edgomez Exp $   * $Id: plugin_2pass2.c,v 1.1.2.23 2003-10-01 23:23:01 edgomez Exp $
29   *   *
30   *****************************************************************************/   *****************************************************************************/
31    
# Line 96  Line 96 
96          double movie_curve;          double movie_curve;
97    
98          /* dynamic */          /* dynamic */
   
99          int * keyframe_locations;          int * keyframe_locations;
100          stat_t * stats;          stat_t * stats;
101    
# Line 244  Line 243 
243          }          }
244    
245          /* Compute the target filesize */          /* Compute the target filesize */
246          if (rc->num_frames  < create->fbase/create->fincr) {          if (rc->param.bitrate<0) {
247                    /* if negative, bitrate equals the target (in kbytes) */
248                    rc->target = (-rc->param.bitrate) * 1024;
249            } else if (rc->num_frames  < create->fbase/create->fincr) {
250                  /* Source sequence is less than 1s long, we do as if it was 1s long */                  /* Source sequence is less than 1s long, we do as if it was 1s long */
251                  rc->target = rc->param.bitrate / 8;                  rc->target = rc->param.bitrate / 8;
252          } else {          } else {
# Line 357  Line 359 
359          if (data->frame_num >= rc->num_frames)          if (data->frame_num >= rc->num_frames)
360                  return 0;                  return 0;
361    
         /*  
          * The last case is the one every normal minded developer should fear to  
          * maintain in a project :-)  
          */  
   
362          /* XXX: why by 8 */          /* XXX: why by 8 */
363          overflow = rc->overflow / 8;          overflow = rc->overflow / 8;
364    
# Line 380  Line 377 
377          dbytes /= rc->movie_curve;          dbytes /= rc->movie_curve;
378    
379          /*          /*
          * We are now entering in the hard part of the algo, it was first designed  
          * to work with i/pframes only streams, so the way it computes things is  
          * adapted to pframes only. However we can use it if we just take care to  
          * scale the bframes sizes to pframes sizes using the ratio avg_p/avg_p and  
          * then before really using values depending on frame sizes, scaling the  
          * value again with the inverse ratio  
          */  
         if (s->type == XVID_TYPE_BVOP)  
                 dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1];  
   
         /*  
380           * Apply user's choosen Payback method. Payback helps bitrate to follow the           * Apply user's choosen Payback method. Payback helps bitrate to follow the
381           * scaled curve "paying back" past errors in curve previsions.           * scaled curve "paying back" past errors in curve previsions.
382           */           */
# Line 398  Line 384 
384                  desired = (int)(rc->curve_comp_error / rc->param.bitrate_payback_delay);                  desired = (int)(rc->curve_comp_error / rc->param.bitrate_payback_delay);
385          } else {          } else {
386                  desired = (int)(rc->curve_comp_error * dbytes /                  desired = (int)(rc->curve_comp_error * dbytes /
387                                                  rc->avg_length[XVID_TYPE_PVOP-1] / rc->param.bitrate_payback_delay);                                                  rc->avg_length[s->type-1] / rc->param.bitrate_payback_delay);
388    
389                  if (labs(desired) > fabs(rc->curve_comp_error)) {                  if (labs(desired) > fabs(rc->curve_comp_error))
390                          desired = (int)rc->curve_comp_error;                          desired = (int)rc->curve_comp_error;
391                  }                  }
         }  
392    
393          rc->curve_comp_error -= desired;          rc->curve_comp_error -= desired;
394    
# Line 413  Line 398 
398          if ((rc->param.curve_compression_high + rc->param.curve_compression_low) &&     s->type != XVID_TYPE_IVOP) {          if ((rc->param.curve_compression_high + rc->param.curve_compression_low) &&     s->type != XVID_TYPE_IVOP) {
399    
400                  curve_temp = rc->curve_comp_scale;                  curve_temp = rc->curve_comp_scale;
401                  if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) {                  if (dbytes > rc->avg_length[s->type-1]) {
402                          curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_high / 100.0);                          curve_temp *= ((double)dbytes + (rc->avg_length[s->type-1] - dbytes) * rc->param.curve_compression_high / 100.0);
403                  } else {                  } else {
404                          curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0);                          curve_temp *= ((double)dbytes + (rc->avg_length[s->type-1] - dbytes) * rc->param.curve_compression_low / 100.0);
405                  }                  }
406    
                 /*  
                  * End of code path for curve_temp, as told earlier, we are now  
                  * obliged to scale the value to a bframe one using the inverse  
                  * ratio applied earlier  
                  */  
                 if (s->type == XVID_TYPE_BVOP)  
                         curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];  
   
407                  desired += (int)curve_temp;                  desired += (int)curve_temp;
408                  rc->curve_comp_error += curve_temp - (int)curve_temp;                  rc->curve_comp_error += curve_temp - (int)curve_temp;
409          } else {          } else {
                 /*  
                  * End of code path for dbytes, as told earlier, we are now  
                  * obliged to scale the value to a bframe one using the inverse  
                  * ratio applied earlier  
                  */  
                 if (s->type == XVID_TYPE_BVOP)  
                         dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];  
   
410                  desired += (int)dbytes;                  desired += (int)dbytes;
411                  rc->curve_comp_error += dbytes - (int)dbytes;                  rc->curve_comp_error += dbytes - (int)dbytes;
412          }          }
413    
   
414          /*          /*
415           * We can't do bigger frames than first pass, this would be stupid as first           * We can't do bigger frames than first pass, this would be stupid as first
416           * pass is quant=2 and that reaching quant=1 is not worth it. We would lose           * pass is quant=2 and that reaching quant=1 is not worth it. We would lose
# Line 462  Line 430 
430    
431          s->desired_length = desired;          s->desired_length = desired;
432    
   
433          /*          /*
434           * if this keyframe is too close to the next, reduce it's byte allotment           * if this keyframe is too close to the next, reduce it's byte allotment
435           * XXX: why do we do this after setting the desired length ?           * XXX: why do we do this after setting the desired length ?
# Line 491  Line 458 
458                  }                  }
459          }          }
460    
461            /*
462             * The "sens commun" would force us to use rc->avg_length[s->type-1] but
463             * even VFW code uses the pframe average length. Note that this length is
464             * used with desired which represents bframes _and_ pframes length.
465             *
466             * XXX: why are we using the avg pframe length for all frame types ?
467             */
468          overflow = (int)((double)overflow * desired / rc->avg_length[XVID_TYPE_PVOP-1]);          overflow = (int)((double)overflow * desired / rc->avg_length[XVID_TYPE_PVOP-1]);
469    
470          /* Reign in overflow with huge frames */          /* Reign in overflow with huge frames */
# Line 600  Line 574 
574          if (capped_to_max_framesize == 0)          if (capped_to_max_framesize == 0)
575                  rc->last_quant[s->type-1] = data->quant;                  rc->last_quant[s->type-1] = data->quant;
576    
577            /* Force frame type */
578            data->type = s->type;
579    
580          return 0;          return 0;
581  }  }
582    
# Line 624  Line 601 
601          rc->overflow += rc->KFoverflow;          rc->overflow += rc->KFoverflow;
602          rc->KFoverflow = s->desired_length - data->length;          rc->KFoverflow = s->desired_length - data->length;
603    
604          if (kfdiff > 1) {  // non-consecutive keyframes                  if (kfdiff > 1) {  /* non-consecutive keyframes */
605              rc->KFoverflow_partial = rc->KFoverflow / (kfdiff - 1);              rc->KFoverflow_partial = rc->KFoverflow / (kfdiff - 1);
606          }else{ // consecutive keyframes                  }else{ /* consecutive keyframes */
607                          rc->overflow += rc->KFoverflow;                          rc->overflow += rc->KFoverflow;
608                          rc->KFoverflow = 0;                          rc->KFoverflow = 0;
609                          rc->KFoverflow_partial = 0;                          rc->KFoverflow_partial = 0;
610          }          }
611          rc->KF_idx++;          rc->KF_idx++;
612      } else {      } else {
613          // distribute part of the keyframe overflow                  /* distribute part of the keyframe overflow */
614          rc->overflow += s->desired_length - data->length + rc->KFoverflow_partial;          rc->overflow += s->desired_length - data->length + rc->KFoverflow_partial;
615          rc->KFoverflow -= rc->KFoverflow_partial;          rc->KFoverflow -= rc->KFoverflow_partial;
616      }      }
# Line 720  Line 697 
697          }else if (type == 'b') {          }else if (type == 'b') {
698              s->type = XVID_TYPE_BVOP;              s->type = XVID_TYPE_BVOP;
699          }else{  /* unknown type */          }else{  /* unknown type */
700              DPRINTF(XVID_DEBUG_RC, "unknown stats frame type; assuming pvop\n");                          DPRINTF(XVID_DEBUG_RC, "WARNING: unknown stats frame type, assuming pvop\n");
701              s->type = XVID_TYPE_PVOP;              s->type = XVID_TYPE_PVOP;
702          }          }
703    
# Line 850  Line 827 
827              next -= create->zones[i].frame;              next -= create->zones[i].frame;
828              rc->avg_weight += (double)(next * create->zones[i].increment) / (double)create->zones[i].base;              rc->avg_weight += (double)(next * create->zones[i].increment) / (double)create->zones[i].base;
829              n += next;              n += next;
830          }else{  // XVID_ZONE_QUANT                  }else{  /* XVID_ZONE_QUANT */
831              for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) {              for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) {
832                  rc->stats[j].zone_mode = XVID_ZONE_QUANT;                  rc->stats[j].zone_mode = XVID_ZONE_QUANT;
833                  rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base;                  rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base;
# Line 1006  Line 983 
983              dbytes = s->scaled_length / rc->movie_curve;              dbytes = s->scaled_length / rc->movie_curve;
984              dbytes2 = 0; /* XXX: warning */              dbytes2 = 0; /* XXX: warning */
985              total1 += dbytes;              total1 += dbytes;
             if (s->type == XVID_TYPE_BVOP)  
                 dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1];  
986    
987                          if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) {                          if (dbytes > rc->avg_length[s->type-1]) {
988                                  dbytes2=((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_high / 100.0);                                  dbytes2=((double)dbytes + (rc->avg_length[s->type-1] - dbytes) * rc->param.curve_compression_high / 100.0);
989                          } else {                          } else {
990                                  dbytes2 = ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0);                                  dbytes2 = ((double)dbytes + (rc->avg_length[s->type-1] - dbytes) * rc->param.curve_compression_low / 100.0);
991                          }                          }
992    
993              if (s->type == XVID_TYPE_BVOP) {                          if (dbytes2 < rc->min_length[s->type-1])
994                              dbytes2 *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];                                  dbytes2 = rc->min_length[s->type-1];
995                              if (dbytes2 < rc->min_length[XVID_TYPE_BVOP-1])  
                                     dbytes2 = rc->min_length[XVID_TYPE_BVOP-1];  
             }else{  
                             if (dbytes2 < rc->min_length[XVID_TYPE_PVOP-1])  
                                     dbytes2 = rc->min_length[XVID_TYPE_PVOP-1];  
             }  
996              total2 += dbytes2;              total2 += dbytes2;
997          }          }
998      }      }
999    
1000      rc->curve_comp_scale = total1 / total2;      rc->curve_comp_scale = total1 / total2;
1001    
1002          DPRINTF(XVID_DEBUG_RC, "middle frame size for asymmetric curve compression: %i\n",          DPRINTF(XVID_DEBUG_RC, "middle frame size for asymmetric curve compression: pframe%d bframe:%d\n",
1003              (int)(rc->avg_length[XVID_TYPE_PVOP-1] * rc->curve_comp_scale));                          (int)(rc->avg_length[XVID_TYPE_PVOP-1] * rc->curve_comp_scale),
1004                            (int)(rc->avg_length[XVID_TYPE_BVOP-1] * rc->curve_comp_scale));
1005    
1006      rc->overflow = 0;      rc->overflow = 0;
1007      rc->KFoverflow = 0;      rc->KFoverflow = 0;
Legend:
Removed from v.1049  
changed lines
  Added in v.1161
No admin address has been configured
 ViewVC Help
Powered by ViewVC 1.0.4