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revision 1267, Wed Dec 17 15:16:16 2003 UTC revision 1296, Sun Dec 21 17:38:17 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 1.1.2.31 2003-12-17 15:16:16 edgomez Exp $   * $Id: plugin_2pass2.c,v 1.1.2.33 2003-12-21 17:38:17 edgomez Exp $
29   *   *
30   *****************************************************************************/   *****************************************************************************/
31    
32  #define BQUANT_PRESCALE  #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 454  Line 457 
457          if (data->quant > 0)          if (data->quant > 0)
458                  return(0);                  return(0);
459    
460          /* Second case: insufficent stats data */          /* Second case: insufficent stats data
461             * We can't guess much what we should do, let core decide all alone */
462          if (data->frame_num >= rc->num_frames) {          if (data->frame_num >= rc->num_frames) {
463                  DPRINTF(XVID_DEBUG_RC,"[xvid rc] -- stats file too short (now processing frame %d)",                  DPRINTF(XVID_DEBUG_RC,"[xvid rc] -- stats file too short (now processing frame %d)",
464                          data->frame_num);                          data->frame_num);
465                  return(0);                  return(0);
466          }          }
467    
468          /* Third case: We are in a Quant zone */          /* Third case: We are in a Quant zone
469             * Quant zones must just ensure we use the same settings as first pass
470             * So set the quantizer and the type */
471          if (s->zone_mode == XVID_ZONE_QUANT) {          if (s->zone_mode == XVID_ZONE_QUANT) {
472                    /* Quant stuff */
473                  rc->fq_error += s->weight;                  rc->fq_error += s->weight;
474                  data->quant = (int)rc->fq_error;                  data->quant = (int)rc->fq_error;
475                  rc->fq_error -= data->quant;                  rc->fq_error -= data->quant;
476    
477                    /* The type stuff */
478                    data->type = s->type;
479    
480                    /* The only required data for AFTER step is this one for the overflow
481                     * control */
482                  s->desired_length = s->length;                  s->desired_length = s->length;
483    
484                  return(0);                  return(0);
# Line 535  Line 547 
547           *-----------------------------------------------------------------------*/           *-----------------------------------------------------------------------*/
548    
549          /* Compute the overflow we should compensate */          /* Compute the overflow we should compensate */
550          if (s->type != XVID_TYPE_IVOP) {          if (s->type != XVID_TYPE_IVOP || rc->overflow > 0) {
551                  double frametype_factor;                  double frametype_factor;
552                  double framesize_factor;                  double framesize_factor;
553    
# Line 566  Line 578 
578                  /* Apply the overflow strength imposed by the user */                  /* Apply the overflow strength imposed by the user */
579                  overflow *= (rc->param.overflow_control_strength/100.0f);                  overflow *= (rc->param.overflow_control_strength/100.0f);
580          } else {          } else {
581                  /* no overflow applied in IFrames because:                  /* no negative overflow applied in IFrames because:
582                   *  - their role is important as they're references for P/BFrames.                   *  - their role is important as they're references for P/BFrames.
583                   *  - 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
584                   *    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 598  Line 610 
610           * pass nor smaller than the allowed minimum.           * pass nor smaller than the allowed minimum.
611           *-----------------------------------------------------------------------*/           *-----------------------------------------------------------------------*/
612    
613    #ifdef PASS_SMALLER
614          if (dbytes > s->length) {          if (dbytes > s->length) {
615                  dbytes = s->length;                  dbytes = s->length;
616          } else if (dbytes < rc->min_length[s->type-1]) {          } else
617    #endif
618                    if (dbytes < rc->min_length[s->type-1]) {
619                  dbytes = rc->min_length[s->type-1];                  dbytes = rc->min_length[s->type-1];
620          } else if (dbytes > rc->max_length) {          } else if (dbytes > rc->max_length) {
621                  /* ToDo: this condition is always wrong as max_length == maximum frame                  /* ToDo: this condition is always wrong as max_length == maximum frame
# Line 1112  Line 1127 
1127          /* Let's compute a linear scaler in order to perform curve scaling */          /* Let's compute a linear scaler in order to perform curve scaling */
1128          scaler = (double)(target - total_invariant) / (double)(pass1_length - total_invariant);          scaler = (double)(target - total_invariant) / (double)(pass1_length - total_invariant);
1129    
1130    #ifdef PASS_SMALLER
1131          if ((target - total_invariant) <= 0 ||          if ((target - total_invariant) <= 0 ||
1132                  (pass1_length - total_invariant) <= 0 ||                  (pass1_length - total_invariant) <= 0 ||
1133                  target >= pass1_length) {                  target >= pass1_length) {
1134                  DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- WARNING: Undersize detected before correction\n");                  DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- WARNING: Undersize detected before correction\n");
1135                  scaler = 1.0;                  scaler = 1.0;
1136          }          }
1137    #endif
1138    
1139          /* Compute min frame lengths (for each frame type) according to the number          /* Compute min frame lengths (for each frame type) according to the number
1140           * 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 1185  Line 1202 
1202          /* Scaling factor for 'regular' frames */          /* Scaling factor for 'regular' frames */
1203          scaler = (double)(target - total_invariant) / (double)(pass1_length - total_invariant);          scaler = (double)(target - total_invariant) / (double)(pass1_length - total_invariant);
1204    
1205    #ifdef PASS_SMALLER
1206          /* Detect undersizing */          /* Detect undersizing */
1207          if (target <= 0 || pass1_length <= 0 || target >= pass1_length) {          if (target <= 0 || pass1_length <= 0 || target >= pass1_length) {
1208                  DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- WARNING: Undersize detected after correction\n");                  DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- WARNING: Undersize detected after correction\n");
1209                  scaler = 1.0;                  scaler = 1.0;
1210          }          }
1211    #endif
1212    
1213          /* Do another pass with the new scaler */          /* Do another pass with the new scaler */
1214          for (i=0; i<rc->num_frames; i++) {          for (i=0; i<rc->num_frames; i++) {
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