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revision 1204, Thu Nov 13 22:35:30 2003 UTC revision 1316, Wed Jan 21 06:59:23 2004 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 1.1.2.25 2003-11-13 22:35:30 edgomez Exp $   * $Id: plugin_2pass2.c,v 1.1.2.35 2004-01-21 06:59:23 syskin Exp $
29   *   *
30   *****************************************************************************/   *****************************************************************************/
31    
32    #define BQUANT_PRESCALE
33  #undef COMPENSATE_FORMULA  #undef COMPENSATE_FORMULA
34    
35    /* forces second pass not to be bigger than first */
36    #undef PASS_SMALLER
37    
38  #include <stdio.h>  #include <stdio.h>
39  #include <math.h>  #include <math.h>
40  #include <limits.h>  #include <limits.h>
# Line 39  Line 43 
43  #include "../image/image.h"  #include "../image/image.h"
44    
45  /*****************************************************************************  /*****************************************************************************
46   * Some constants   * Some default settings
47   ****************************************************************************/   ****************************************************************************/
48    
49  #define DEFAULT_KEYFRAME_BOOST 0  #define DEFAULT_KEYFRAME_BOOST 0
50  #define DEFAULT_OVERFLOW_CONTROL_STRENGTH 10  #define DEFAULT_OVERFLOW_CONTROL_STRENGTH 10
51  #define DEFAULT_CURVE_COMPRESSION_HIGH 0  #define DEFAULT_CURVE_COMPRESSION_HIGH 0
52  #define DEFAULT_CURVE_COMPRESSION_LOW 0  #define DEFAULT_CURVE_COMPRESSION_LOW 0
53  #define DEFAULT_MAX_OVERFLOW_IMPROVEMENT 60  #define DEFAULT_MAX_OVERFLOW_IMPROVEMENT 10
54  #define DEFAULT_MAX_OVERFLOW_DEGRADATION 60  #define DEFAULT_MAX_OVERFLOW_DEGRADATION 10
55    
56  /* Keyframe settings */  /* Keyframe settings */
57  #define DEFAULT_KFREDUCTION 20  #define DEFAULT_KFREDUCTION 20
58  #define DEFAULT_MIN_KEY_INTERVAL 1  #define DEFAULT_KFTHRESHOLD 1
59    
60    /*****************************************************************************
61     * Some default constants (can be tuned)
62     ****************************************************************************/
63    
64    /* Specify the invariant part of the headers bits (header+MV)
65     * as  hlength/cst */
66    #define INVARIANT_HEADER_PART_IVOP 1 /* factor 1.0f   */
67    #define INVARIANT_HEADER_PART_PVOP 2 /* factor 0.5f   */
68    #define INVARIANT_HEADER_PART_BVOP 8 /* factor 0.125f */
69    
70  /*****************************************************************************  /*****************************************************************************
71   * Structures   * Structures
# Line 61  Line 75 
75  typedef struct {  typedef struct {
76          int type;               /* first pass type */          int type;               /* first pass type */
77          int quant;              /* first pass quant */          int quant;              /* first pass quant */
         int quant2;             /* Second pass quant */  
78          int blks[3];                    /* k,m,y blks */          int blks[3];                    /* k,m,y blks */
79          int length;             /* first pass length */          int length;             /* first pass length */
80            int invariant;          /* what we assume as being invariant between the two passes, it's a sub part of header + MV bits */
81          int scaled_length;      /* scaled length */          int scaled_length;      /* scaled length */
82          int desired_length;     /* desired length; calculated during encoding */          int desired_length;     /* desired length; calculated during encoding */
83          int error;          int error;
# Line 95  Line 109 
109    
110          /* Total length of each frame types (1st pass) */          /* Total length of each frame types (1st pass) */
111          uint64_t tot_length[3];          uint64_t tot_length[3];
112            uint64_t tot_invariant[3];
113    
114          /* Average length of each frame types (used first for 1st pass data and          /* Average length of each frame types (used first for 1st pass data and
115           * then for scaled averages */           * then for scaled averages */
# Line 115  Line 130 
130    
131          /*----------------------------------          /*----------------------------------
132           * Zones statistical data           * Zones statistical data
          *  
          * ToDo: Fix zones, current  
          *       implementation is buggy  
133           *--------------------------------*/           *--------------------------------*/
134    
         /* Average weight of the zones */  
         double avg_weight;  
   
135          /* Total length used by XVID_ZONE_QUANT zones */          /* Total length used by XVID_ZONE_QUANT zones */
136          int64_t tot_quant;          uint64_t tot_quant;
137            uint64_t tot_quant_invariant;
138    
139            /* Holds the total amount of frame bytes, zone weighted (only scalable
140             * part of frame bytes) */
141            uint64_t tot_weighted;
142    
143          /*----------------------------------          /*----------------------------------
144           * Advanced settings helper ratios           * Advanced settings helper ratios
# Line 220  Line 234 
234  {  {
235          switch(opt) {          switch(opt) {
236          case XVID_PLG_INFO :          case XVID_PLG_INFO :
237            case XVID_PLG_FRAME :
238                  return 0;                  return 0;
239    
240          case XVID_PLG_CREATE :          case XVID_PLG_CREATE :
# Line 281  Line 296 
296    
297          /* Keyframe settings */          /* Keyframe settings */
298          _INIT(rc->param.kfreduction, DEFAULT_KFREDUCTION);          _INIT(rc->param.kfreduction, DEFAULT_KFREDUCTION);
299          _INIT(rc->param.min_key_interval, DEFAULT_MIN_KEY_INTERVAL);          _INIT(rc->param.kfthreshold, DEFAULT_KFTHRESHOLD);
300  #undef _INIT  #undef _INIT
301    
302          /* Initialize some stuff to zero */          /* Initialize some stuff to zero */
# Line 332  Line 347 
347          /* Compute the target filesize */          /* Compute the target filesize */
348          if (rc->param.bitrate<0) {          if (rc->param.bitrate<0) {
349                  /* if negative, bitrate equals the target (in kbytes) */                  /* if negative, bitrate equals the target (in kbytes) */
350                  rc->target = (-rc->param.bitrate) * 1024;                  rc->target = ((uint64_t)(-rc->param.bitrate)) * 1024;
351          } else if (rc->num_frames  < create->fbase/create->fincr) {          } else if (rc->num_frames  < create->fbase/create->fincr) {
352                  /* 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 */
353                  rc->target = rc->param.bitrate / 8;                  rc->target = rc->param.bitrate / 8;
# Line 358  Line 373 
373          if(rc->param.container_frame_overhead)          if(rc->param.container_frame_overhead)
374                  DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- New target filesize after container compensation: %lld\n", rc->target);                  DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- New target filesize after container compensation: %lld\n", rc->target);
375    
376            /* When bitrate is not given it means it has been scaled by an external
377             * application */
378            if (rc->param.bitrate) {
379                    /* Apply zone settings
380                     * - set rc->tot_quant which represents the total num of bytes spent in
381                     *   fixed quant zones
382                     * - set rc->tot_weighted which represents the total amount of bytes
383                     *   spent in normal or weighted zones in first pass (normal zones can
384                     *   be considered weight=1)
385                     * - set rc->tot_quant_invariant which represents the total num of bytes
386                     *   spent in fixed quant zones for headers */
387                    zone_process(rc, create);
388            } else {
389                    /* External scaling -- zones are ignored */
390                    for (i=0;i<rc->num_frames;i++) {
391                            rc->stats[i].zone_mode = XVID_ZONE_WEIGHT;
392                            rc->stats[i].weight = 1.0;
393                    }
394                    rc->tot_quant = 0;
395            }
396    
397          /* Gathers some information about first pass stats:          /* Gathers some information about first pass stats:
398           *  - finds the minimum frame length for each frame type during 1st pass.           *  - finds the minimum frame length for each frame type during 1st pass.
399           *     rc->min_size[]           *     rc->min_size[]
# Line 366  Line 402 
402           *  - count how many times each frame type has been used.           *  - count how many times each frame type has been used.
403           *     rc->count[]           *     rc->count[]
404           *  - total bytes used per frame type           *  - total bytes used per frame type
405           *     rc->total[]           *     rc->tot_length[]
406             *  - total bytes considered invariant between the 2 passes
407           *  - store keyframe location           *  - store keyframe location
408           *     rc->keyframe_locations[]           *     rc->keyframe_locations[]
409           */           */
410          first_pass_stats_prepare_data(rc);          first_pass_stats_prepare_data(rc);
411    
412          /* When bitrate is not given it means it has been scaled by an external          /* If we have a user bitrate, it means it's an internal curve scaling */
          * application */  
413          if (rc->param.bitrate) {          if (rc->param.bitrate) {
                 /* Apply zone settings */  
                 zone_process(rc, create);  
414                  /* Perform internal curve scaling */                  /* Perform internal curve scaling */
415                  first_pass_scale_curve_internal(rc);                  first_pass_scale_curve_internal(rc);
         } else {  
                 /* External scaling -- zones are ignored */  
                 for (i=0;i<rc->num_frames;i++) {  
                         rc->stats[i].zone_mode = XVID_ZONE_WEIGHT;  
                         rc->stats[i].weight = 1.0;  
                 }  
                 rc->avg_weight = 1.0;  
                 rc->tot_quant = 0;  
416          }          }
417    
418          /* Apply advanced curve options, and compute some parameters in order to          /* Apply advanced curve options, and compute some parameters in order to
# Line 435  Line 461 
461          if (data->quant > 0)          if (data->quant > 0)
462                  return(0);                  return(0);
463    
464          /* Second case: We are in a Quant zone */          /* Second case: insufficent stats data
465             * We can't guess much what we should do, let core decide all alone */
466            if (data->frame_num >= rc->num_frames) {
467                    DPRINTF(XVID_DEBUG_RC,"[xvid rc] -- stats file too short (now processing frame %d)",
468                            data->frame_num);
469                    return(0);
470            }
471    
472            /* Third case: We are in a Quant zone
473             * Quant zones must just ensure we use the same settings as first pass
474             * So set the quantizer and the type */
475          if (s->zone_mode == XVID_ZONE_QUANT) {          if (s->zone_mode == XVID_ZONE_QUANT) {
476                    /* Quant stuff */
477                  rc->fq_error += s->weight;                  rc->fq_error += s->weight;
478                  data->quant = (int)rc->fq_error;                  data->quant = (int)rc->fq_error;
479                  rc->fq_error -= data->quant;                  rc->fq_error -= data->quant;
480    
481                    /* The type stuff */
482                    data->type = s->type;
483    
484                    /* The only required data for AFTER step is this one for the overflow
485                     * control */
486                  s->desired_length = s->length;                  s->desired_length = s->length;
487    
488                  return(0);                  return(0);
489          }          }
490    
         /* Third case: insufficent stats data */  
         if (data->frame_num >= rc->num_frames)  
                 return(0);  
491    
492          /*************************************************************************/          /*************************************************************************/
493          /*************************************************************************/          /*************************************************************************/
# Line 466  Line 505 
505    
506          /* IFrame user settings*/          /* IFrame user settings*/
507          if (s->type == XVID_TYPE_IVOP) {          if (s->type == XVID_TYPE_IVOP) {
   
508                  /* Keyframe boosting -- All keyframes benefit from it */                  /* Keyframe boosting -- All keyframes benefit from it */
509                  dbytes += dbytes*rc->param.keyframe_boost / 100;                  dbytes += dbytes*rc->param.keyframe_boost / 100;
510    
511                  /* Applies keyframe penalties, but not the first frame */  #if 0 /* ToDo: decide how to apply kfthresholding */
512                  if (rc->KF_idx) {  #endif
                         int penalty_distance;  
   
                         /* Minimum keyframe distance penalties */  
                         penalty_distance  = rc->param.min_key_interval;  
                         penalty_distance -= rc->keyframe_locations[rc->KF_idx];  
                         penalty_distance += rc->keyframe_locations[rc->KF_idx-1];  
   
                         /* Ah ah ! guilty keyframe, you're under arrest ! */  
                         if (penalty_distance > 0)  
                                 dbytes -= dbytes*penalty_distance*rc->param.kfreduction/100;  
                 }  
513          } else {          } else {
514    
515                  /* P/S/B frames must reserve some bits for iframe boosting */                  /* P/S/B frames must reserve some bits for iframe boosting */
# Line 524  Line 551 
551           *-----------------------------------------------------------------------*/           *-----------------------------------------------------------------------*/
552    
553          /* Compute the overflow we should compensate */          /* Compute the overflow we should compensate */
554          if (s->type != XVID_TYPE_IVOP) {          if (s->type != XVID_TYPE_IVOP || rc->overflow > 0) {
555                  double frametype_factor;                  double frametype_factor;
556                  double framesize_factor;                  double framesize_factor;
557    
# Line 555  Line 582 
582                  /* Apply the overflow strength imposed by the user */                  /* Apply the overflow strength imposed by the user */
583                  overflow *= (rc->param.overflow_control_strength/100.0f);                  overflow *= (rc->param.overflow_control_strength/100.0f);
584          } else {          } else {
585                  /* no overflow applied in IFrames because:                  /* no negative overflow applied in IFrames because:
586                   *  - their role is important as they're references for P/BFrames.                   *  - their role is important as they're references for P/BFrames.
587                   *  - there aren't much in typical sequences, so if an IFrame overflows too                   *  - there aren't much in typical sequences, so if an IFrame overflows too
588                   *    much, this overflow may impact the next IFrame too much and generate                   *    much, this overflow may impact the next IFrame too much and generate
# Line 587  Line 614 
614           * pass nor smaller than the allowed minimum.           * pass nor smaller than the allowed minimum.
615           *-----------------------------------------------------------------------*/           *-----------------------------------------------------------------------*/
616    
617    #ifdef PASS_SMALLER
618          if (dbytes > s->length) {          if (dbytes > s->length) {
619                  dbytes = s->length;                  dbytes = s->length;
620          } else if (dbytes < rc->min_length[s->type-1]) {          } else
621                    if (dbytes < rc->min_length[s->type-1]) {
622                  dbytes = rc->min_length[s->type-1];                  dbytes = rc->min_length[s->type-1];
623          } else if (dbytes > rc->max_length) {          } else if (dbytes > rc->max_length) {
624                  /* ToDo: this condition is always wrong as max_length == maximum frame                  /* ToDo: this condition is always wrong as max_length == maximum frame
# Line 600  Line 629 
629                  DPRINTF(XVID_DEBUG_RC,"[xvid rc] -- frame:%d Capped to maximum frame size\n",                  DPRINTF(XVID_DEBUG_RC,"[xvid rc] -- frame:%d Capped to maximum frame size\n",
630                                  data->frame_num);                                  data->frame_num);
631          }          }
632    #endif
633          /*------------------------------------------------------------------------          /*------------------------------------------------------------------------
634           * Desired frame length <-> quantizer mapping           * Desired frame length <-> quantizer mapping
635           *-----------------------------------------------------------------------*/           *-----------------------------------------------------------------------*/
636    
637          /* For bframes we must retrieve the original quant used (sent to xvidcore)  #ifdef BQUANT_PRESCALE
638           * as core applies the bquant formula before writing the stat log entry */          /* For bframes we prescale the quantizer to avoid too high quant scaling */
639          if(s->type == XVID_TYPE_BVOP) {          if(s->type == XVID_TYPE_BVOP) {
640    
641                  twopass_stat_t *b_ref = s;                  twopass_stat_t *b_ref = s;
# Line 616  Line 645 
645                          b_ref--;                          b_ref--;
646    
647                  /* Compute the original quant */                  /* Compute the original quant */
648                  s->quant  = 100*s->quant - data->bquant_offset;                  s->quant  = 2*(100*s->quant - data->bquant_offset);
649                  s->quant += data->bquant_ratio - 1; /* to avoid rouding issues */                  s->quant += data->bquant_ratio - 1; /* to avoid rounding issues */
650                  s->quant  = s->quant/data->bquant_ratio - b_ref->quant;                  s->quant  = s->quant/data->bquant_ratio - b_ref->quant;
651          }          }
652    #endif
653    
654          /* Don't laugh at this very 'simple' quant<->filesize relationship, it          /* Don't laugh at this very 'simple' quant<->size relationship, it
655           * proves to be acurate enough for our algorithm */           * proves to be acurate enough for our algorithm */
656          scaled_quant = (double)s->quant*(double)s->length/(double)dbytes;          scaled_quant = (double)s->quant*(double)s->length/(double)dbytes;
657    
# Line 709  Line 739 
739          /* Don't forget to force 1st pass frame type ;-) */          /* Don't forget to force 1st pass frame type ;-) */
740          data->type = s->type;          data->type = s->type;
741    
         /* Store the quantizer into the statistics -- Used to compensate the double  
          * formula symptom */  
         s->quant2 = data->quant;  
   
742          return 0;          return 0;
743  }  }
744    
# Line 774  Line 800 
800                  rc->KFoverflow -= rc->KFoverflow_partial;                  rc->KFoverflow -= rc->KFoverflow_partial;
801          }          }
802    
803          rc->overflow += s->error = s->desired_length - data->length;          rc->overflow += (s->error = s->desired_length - data->length);
804          rc->real_total += data->length;          rc->real_total += data->length;
805    
806          DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- frame:%d type:%c quant:%d stats:%d scaled:%d desired:%d actual:%d error:%d overflow:%.2f\n",          DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- frame:%d type:%c quant:%d stats:%d scaled:%d desired:%d actual:%d error:%d overflow:%.2f\n",
# Line 839  Line 865 
865                  /* Read the stat line from buffer */                  /* Read the stat line from buffer */
866                  fields = sscanf(ptr, "%c", &type);                  fields = sscanf(ptr, "%c", &type);
867    
868                  /* Valid stats files have at least 6 fields */                  /* Valid stats files have at least 7 fields */
869                  if (fields == 1) {                  if (fields == 1) {
870                          switch(type) {                          switch(type) {
871                          case 'i':                          case 'i':
# Line 861  Line 887 
887                  } else {                  } else {
888                                  DPRINTF(XVID_DEBUG_RC,                                  DPRINTF(XVID_DEBUG_RC,
889                                                  "[xvid rc] -- WARNING: L%d misses some stat fields (%d).\n",                                                  "[xvid rc] -- WARNING: L%d misses some stat fields (%d).\n",
890                                                  lines, 6-fields);                                                  lines, 7-fields);
891                  }                  }
892    
893                  /* Free the line buffer */                  /* Free the line buffer */
# Line 910  Line 936 
936    
937                  /* Convert the fields */                  /* Convert the fields */
938                  fields = sscanf(ptr,                  fields = sscanf(ptr,
939                                                  "%c %d %d %d %d %d %d\n",                                                  "%c %d %d %d %d %d %d %d\n",
940                                                  &type,                                                  &type,
941                                                  &s->quant,                                                  &s->quant,
942                                                  &s->blks[0], &s->blks[1], &s->blks[2],                                                  &s->blks[0], &s->blks[1], &s->blks[2],
943                                                  &s->length,                                                  &s->length, &s->invariant /* not really yet */,
944                                                  &s->scaled_length);                                                  &s->scaled_length);
945    
946                  /* Free line buffer, we don't need it anymore */                  /* Free line buffer, we don't need it anymore */
# Line 922  Line 948 
948    
949                  /* Fail silently, this has probably been warned in                  /* Fail silently, this has probably been warned in
950                   * statsfile_count_frames */                   * statsfile_count_frames */
951                  if(fields != 6 && fields != 7)                  if(fields != 7 && fields != 8)
952                          continue;                          continue;
953    
954                  /* Convert frame type */                  /* Convert frame type and compute the invariant length part */
955                  switch(type) {                  switch(type) {
956                  case 'i':                  case 'i':
957                  case 'I':                  case 'I':
958                          s->type = XVID_TYPE_IVOP;                          s->type = XVID_TYPE_IVOP;
959                            s->invariant /= INVARIANT_HEADER_PART_IVOP;
960                          break;                          break;
961                  case 'p':                  case 'p':
962                  case 'P':                  case 'P':
963                  case 's':                  case 's':
964                  case 'S':                  case 'S':
965                          s->type = XVID_TYPE_PVOP;                          s->type = XVID_TYPE_PVOP;
966                            s->invariant /= INVARIANT_HEADER_PART_PVOP;
967                          break;                          break;
968                  case 'b':                  case 'b':
969                  case 'B':                  case 'B':
970                          s->type = XVID_TYPE_BVOP;                          s->type = XVID_TYPE_BVOP;
971                            s->invariant /= INVARIANT_HEADER_PART_BVOP;
972                          break;                          break;
973                  default:                  default:
974                          /* Same as before, fail silently */                          /* Same as before, fail silently */
# Line 958  Line 987 
987    
988  /* pre-process the statistics data  /* pre-process the statistics data
989   * - for each type, count, tot_length, min_length, max_length   * - for each type, count, tot_length, min_length, max_length
990   * - set keyframes_locations */   * - set keyframes_locations, tot_prescaled */
991  static void  static void
992  first_pass_stats_prepare_data(rc_2pass2_t * rc)  first_pass_stats_prepare_data(rc_2pass2_t * rc)
993  {  {
# Line 970  Line 999 
999          for (i=0; i<3; i++) {          for (i=0; i<3; i++) {
1000                  rc->count[i]=0;                  rc->count[i]=0;
1001                  rc->tot_length[i] = 0;                  rc->tot_length[i] = 0;
1002                    rc->tot_invariant[i] = 0;
1003                  rc->min_length[i] = INT_MAX;                  rc->min_length[i] = INT_MAX;
1004          }          }
1005    
1006          rc->max_length = INT_MIN;          rc->max_length = INT_MIN;
1007            rc->tot_weighted = 0;
1008    
1009          /* Loop through all frames and find/compute all the stuff this function          /* Loop through all frames and find/compute all the stuff this function
1010           * is supposed to do */           * is supposed to do */
# Line 982  Line 1013 
1013    
1014                  rc->count[s->type-1]++;                  rc->count[s->type-1]++;
1015                  rc->tot_length[s->type-1] += s->length;                  rc->tot_length[s->type-1] += s->length;
1016                    rc->tot_invariant[s->type-1] += s->invariant;
1017                    if (s->zone_mode != XVID_ZONE_QUANT)
1018                            rc->tot_weighted += (int)(s->weight*(s->length - s->invariant));
1019    
1020                  if (s->length < rc->min_length[s->type-1]) {                  if (s->length < rc->min_length[s->type-1]) {
1021                          rc->min_length[s->type-1] = s->length;                          rc->min_length[s->type-1] = s->length;
# Line 1016  Line 1050 
1050          int i,j;          int i,j;
1051          int n = 0;          int n = 0;
1052    
         rc->avg_weight = 0.0;  
1053          rc->tot_quant = 0;          rc->tot_quant = 0;
1054            rc->tot_quant_invariant = 0;
1055    
1056          if (create->num_zones == 0) {          if (create->num_zones == 0) {
1057                  for (j = 0; j < rc->num_frames; j++) {                  for (j = 0; j < rc->num_frames; j++) {
1058                          rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;                          rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;
1059                          rc->stats[j].weight = 1.0;                          rc->stats[j].weight = 1.0;
1060                  }                  }
                 rc->avg_weight += rc->num_frames * 1.0;  
1061                  n += rc->num_frames;                  n += rc->num_frames;
1062          }          }
1063    
# Line 1034  Line 1066 
1066    
1067                  int next = (i+1<create->num_zones) ? create->zones[i+1].frame : rc->num_frames;                  int next = (i+1<create->num_zones) ? create->zones[i+1].frame : rc->num_frames;
1068    
1069                    /* Zero weight make no sense */
1070                    if (create->zones[i].increment == 0) create->zones[i].increment = 1;
1071                    /* And obviously an undetermined infinite makes even less sense */
1072                    if (create->zones[i].base == 0) create->zones[i].base = 1;
1073    
1074                  if (i==0 && create->zones[i].frame > 0) {                  if (i==0 && create->zones[i].frame > 0) {
1075                          for (j = 0; j < create->zones[i].frame && j < rc->num_frames; j++) {                          for (j = 0; j < create->zones[i].frame && j < rc->num_frames; j++) {
1076                                  rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;                                  rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;
1077                                  rc->stats[j].weight = 1.0;                                  rc->stats[j].weight = 1.0;
1078                          }                          }
                         rc->avg_weight += create->zones[i].frame * 1.0;  
1079                          n += create->zones[i].frame;                          n += create->zones[i].frame;
1080                  }                  }
1081    
# Line 1049  Line 1085 
1085                                  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;
1086                          }                          }
1087                          next -= create->zones[i].frame;                          next -= create->zones[i].frame;
                         rc->avg_weight += (double)(next * create->zones[i].increment) / (double)create->zones[i].base;  
1088                          n += next;                          n += next;
1089                  }else{  /* XVID_ZONE_QUANT */                  }else{  /* XVID_ZONE_QUANT */
1090                          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++ ) {
1091                                  rc->stats[j].zone_mode = XVID_ZONE_QUANT;                                  rc->stats[j].zone_mode = XVID_ZONE_QUANT;
1092                                  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;
1093                                  rc->tot_quant += rc->stats[j].length;                                  rc->tot_quant += rc->stats[j].length;
1094                                    rc->tot_quant_invariant += rc->stats[j].invariant;
1095                          }                          }
1096                  }                  }
1097          }          }
         rc->avg_weight = n>0 ? rc->avg_weight/n : 1.0;  
   
         DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- center_weight:%f (for %d frames)  fixed_bytes:%d\n", rc->avg_weight, n, rc->tot_quant);  
1098  }  }
1099    
1100    
# Line 1070  Line 1103 
1103  first_pass_scale_curve_internal(rc_2pass2_t *rc)  first_pass_scale_curve_internal(rc_2pass2_t *rc)
1104  {  {
1105          int64_t target;          int64_t target;
1106          int64_t pass1_length;          int64_t total_invariant;
1107          double scaler;          double scaler;
1108          int i, num_MBs;          int i, num_MBs;
1109    
1110          /* We remove the bytes used by the fixed quantizer zones          /* We only scale texture data ! */
1111           * ToDo: this approach is flawed, the same amount of bytes is removed from          total_invariant  = rc->tot_invariant[XVID_TYPE_IVOP-1];
1112           *       target and first pass data, this has no sense, zone_process should          total_invariant += rc->tot_invariant[XVID_TYPE_PVOP-1];
1113           *       give us two results one for unscaled data (1pass) and the other          total_invariant += rc->tot_invariant[XVID_TYPE_BVOP-1];
1114           *       one for scaled data and we should then write:          /* don't forget to substract header bytes used in quant zones, otherwise we
1115           *       target = rc->target - rc->tot_quant_scaled;           * counting them twice */
1116           *       pass1_length = rc->i+p+b - rc->tot_quant_firstpass */          total_invariant -= rc->tot_quant_invariant;
1117          target = rc->target - rc->tot_quant;  
1118            /* We remove the bytes used by the fixed quantizer zones during first pass
1119          /* Do the same for the first pass data */           * with the same quants, so we know very precisely how much that
1120          pass1_length  = rc->tot_length[XVID_TYPE_IVOP-1];           * represents */
1121          pass1_length += rc->tot_length[XVID_TYPE_PVOP-1];          target  = rc->target;
1122          pass1_length += rc->tot_length[XVID_TYPE_BVOP-1];          target -= rc->tot_quant;
         pass1_length -= rc->tot_quant;  
1123    
1124          /* Let's compute a linear scaler in order to perform curve scaling */          /* Let's compute a linear scaler in order to perform curve scaling */
1125          scaler = (double)target / (double)pass1_length;          scaler = (double)(target - total_invariant) / (double)(rc->tot_weighted);
   
         if (target <= 0 || pass1_length <= 0 || target >= pass1_length) {  
                 DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- WARNING: Undersize detected before correction\n");  
                 scaler = 1.0;  
         }  
1126    
1127          /* Compute min frame lengths (for each frame type) according to the number          /* Compute min frame lengths (for each frame type) according to the number
1128           * of MBs. We sum all block type counters of frame 0, this gives us the           * of MBs. We sum all block type counters of frame 0, this gives us the
# Line 1137  Line 1164 
1164                          continue;                          continue;
1165                  }                  }
1166    
1167                  /* Compute the scaled length */                  /* Compute the scaled length -- only non invariant data length is scaled */
1168                  len = (int)((double)s->length * scaler * s->weight / rc->avg_weight);                  len = s->invariant + (int)((double)(s->length-s->invariant) * scaler * s->weight);
1169    
1170                  /* Compare with the computed minimum */                  /* Compare with the computed minimum */
1171                  if (len < rc->min_length[s->type-1]) {                  if (len < rc->min_length[s->type-1]) {
# Line 1150  Line 1177 
1177                           * total counters, as we prepare a second pass for 'regular'                           * total counters, as we prepare a second pass for 'regular'
1178                           * frames */                           * frames */
1179                          target -= s->scaled_length;                          target -= s->scaled_length;
                         pass1_length -= s->length;  
1180                  } else {                  } else {
1181                          /* Do nothing for now, we'll scale this later */                          /* Do nothing for now, we'll scale this later */
1182                          s->scaled_length = 0;                          s->scaled_length = 0;
# Line 1161  Line 1187 
1187           * total counters. Now, it's possible to scale the 'regular' frames. */           * total counters. Now, it's possible to scale the 'regular' frames. */
1188    
1189          /* Scaling factor for 'regular' frames */          /* Scaling factor for 'regular' frames */
1190          scaler = (double)target / (double)pass1_length;          scaler = (double)(target - total_invariant) / (double)(rc->tot_weighted);
   
         /* Detect undersizing */  
         if (target <= 0 || pass1_length <= 0 || target >= pass1_length) {  
                 DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- WARNING: Undersize detected after correction\n");  
                 scaler = 1.0;  
         }  
1191    
1192          /* Do another pass with the new scaler */          /* Do another pass with the new scaler */
1193          for (i=0; i<rc->num_frames; i++) {          for (i=0; i<rc->num_frames; i++) {
# Line 1175  Line 1195 
1195    
1196                  /* Ignore frame with forced frame sizes */                  /* Ignore frame with forced frame sizes */
1197                  if (s->scaled_length == 0)                  if (s->scaled_length == 0)
1198                          s->scaled_length = (int)((double)s->length * scaler * s->weight / rc->avg_weight);                          s->scaled_length = s->invariant + (int)((double)(s->length-s->invariant) * scaler * s->weight);
1199          }          }
1200    
1201          /* Job done */          /* Job done */
# Line 1190  Line 1210 
1210  scaled_curve_apply_advanced_parameters(rc_2pass2_t * rc)  scaled_curve_apply_advanced_parameters(rc_2pass2_t * rc)
1211  {  {
1212          int i;          int i;
1213          uint64_t ivop_boost_total;          int64_t ivop_boost_total;
1214    
1215          /* Reset the rate controller (per frame type) total byte counters */          /* Reset the rate controller (per frame type) total byte counters */
1216          for (i=0; i<3; i++) rc->tot_scaled_length[i] = 0;          for (i=0; i<3; i++) rc->tot_scaled_length[i] = 0;
# Line 1213  Line 1233 
1233    
1234                  /* Some more work is needed for I frames */                  /* Some more work is needed for I frames */
1235                  if (s->type == XVID_TYPE_IVOP) {                  if (s->type == XVID_TYPE_IVOP) {
                         int penalty_distance;  
1236                          int ivop_boost;                          int ivop_boost;
1237    
1238                          /* Accumulate bytes needed for keyframe boosting */                          /* Accumulate bytes needed for keyframe boosting */
1239                          ivop_boost = s->scaled_length*rc->param.keyframe_boost/100;                          ivop_boost = s->scaled_length*rc->param.keyframe_boost/100;
1240    
1241                          if (rc->KF_idx) {  #if 0 /* ToDo: decide how to apply kfthresholding */
1242                                  /* Minimum keyframe distance penalties */  #endif
                                 penalty_distance  = rc->param.min_key_interval;  
                                 penalty_distance -= rc->keyframe_locations[rc->KF_idx];  
                                 penalty_distance += rc->keyframe_locations[rc->KF_idx-1];  
   
                                 /* Ah ah ! guilty keyframe, you're under arrest ! */  
                                 if (penalty_distance > 0)  
                                          ivop_boost -= (s->scaled_length + ivop_boost)*penalty_distance*rc->param.kfreduction/100;  
                         }  
   
1243                          /* If the frame size drops under the minimum length, then cap ivop_boost */                          /* If the frame size drops under the minimum length, then cap ivop_boost */
1244                          if (ivop_boost + s->scaled_length < rc->min_length[XVID_TYPE_IVOP-1])                          if (ivop_boost + s->scaled_length < rc->min_length[XVID_TYPE_IVOP-1])
1245                                  ivop_boost = rc->min_length[XVID_TYPE_IVOP-1] - s->scaled_length;                                  ivop_boost = rc->min_length[XVID_TYPE_IVOP-1] - s->scaled_length;
# Line 1259  Line 1269 
1269    
1270          /* Compute the ratio described above          /* Compute the ratio described above
1271           *     taxed_total = sum(0, n, tax*scaled_length)           *     taxed_total = sum(0, n, tax*scaled_length)
1272           * <=> taxed_total = tax.sum(0, n, tax*scaled_length)           * <=> taxed_total = tax.sum(0, n, scaled_length)
1273           * <=> tax = taxed_total / original_total */           * <=> tax = taxed_total / original_total */
1274          rc->pb_iboost_tax_ratio =          rc->pb_iboost_tax_ratio =
1275                  (rc->pb_iboost_tax_ratio - ivop_boost_total) /                  (rc->pb_iboost_tax_ratio - ivop_boost_total) /
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