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revision 942, Tue Mar 25 11:01:48 2003 UTC revision 1046, Thu May 29 10:19:35 2003 UTC
# Line 1  Line 1 
1  /******************************************************************************  /******************************************************************************
2   *   *
3   * XviD Bit Rate Controller Library   * XviD Bit Rate Controller Library
4   * - VBR 2 pass bitrate controler implementation -   * - VBR 2 pass bitrate controller implementation -
5   *   *
6   * Copyright (C) 2002 Edouard Gomez <ed.gomez@wanadoo.fr>   * Copyright (C)      2002 Foxer <email?>
7     *                    2002 Dirk Knop <dknop@gwdg.de>
8     *               2002-2003 Edouard Gomez <ed.gomez@free.fr>
9     *                    2003 Pete Ross <pross@xvid.org>
10   *   *
11   * The curve treatment algorithm is the one implemented by Foxer <email?> and   * This curve treatment algorithm is the one originally implemented by Foxer
12   * Dirk Knop <dknop@gwdg.de> for the XviD vfw dynamic library.   * and tuned by Dirk Knop for the XviD vfw frontend.
13   *   *
14   * This program is free software; you can redistribute it and/or modify   * This program is free software; you can redistribute it and/or modify
15   * it under the terms of the GNU General Public License as published by   * it under the terms of the GNU General Public License as published by
# Line 22  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 1.1.2.1 2003-03-25 10:58:33 suxen_drol Exp $   * $Id: plugin_2pass2.c,v 1.1.2.13 2003-05-29 10:19:35 edgomez Exp $
29   *   *
30   *****************************************************************************/   *****************************************************************************/
31    
32  #include <stdio.h>  #include <stdio.h>
33  #include <math.h>  #include <math.h>
34    #include <limits.h>
 #define RAD2DEG 57.295779513082320876798154814105  
 #define DEG2RAD 0.017453292519943295769236907684886  
35    
36  #include "../xvid.h"  #include "../xvid.h"
37  #include "../image/image.h"  #include "../image/image.h"
38    
39    /*****************************************************************************
40     * Some constants
41     ****************************************************************************/
42    
43    #define DEFAULT_KEYFRAME_BOOST 0
44    #define DEFAULT_PAYBACK_METHOD XVID_PAYBACK_PROP
45    #define DEFAULT_BITRATE_PAYBACK_DELAY 250
46    #define DEFAULT_CURVE_COMPRESSION_HIGH 0
47    #define DEFAULT_CURVE_COMPRESSION_LOW 0
48    #define DEFAULT_MAX_OVERFLOW_IMPROVEMENT 60
49    #define DEFAULT_MAX_OVERFLOW_DEGRADATION 60
50    
51    /* Alt curve settings */
52    #define DEFAULT_USE_ALT_CURVE 0
53    #define DEFAULT_ALT_CURVE_HIGH_DIST 500
54    #define DEFAULT_ALT_CURVE_LOW_DIST 90
55    #define DEFAULT_ALT_CURVE_USE_AUTO 1
56    #define DEFAULT_ALT_CURVE_AUTO_STR 30
57    #define DEFAULT_ALT_CURVE_TYPE XVID_CURVE_LINEAR
58    #define DEFAULT_ALT_CURVE_MIN_REL_QUAL 50
59    #define DEFAULT_ALT_CURVE_USE_AUTO_BONUS_BIAS 1
60    #define DEFAULT_ALT_CURVE_BONUS_BIAS 50
61    
62    /* Keyframe settings */
63    #define DEFAULT_KFTRESHOLD 10
64    #define DEFAULT_KFREDUCTION 20
65    #define DEFAULT_MIN_KEY_INTERVAL 1
66    
67    /*****************************************************************************
68     * Structures
69     ****************************************************************************/
70    
71    /* Statistics */
72  typedef struct {  typedef struct {
73      int type;               /* first pass type */      int type;               /* first pass type */
74      int quant;              /* first pass quant */      int quant;              /* first pass quant */
75            int blks[3];                    /* k,m,y blks */
76      int length;             /* first pass length */      int length;             /* first pass length */
77      int scaled_length;     /* scaled length */      int scaled_length;     /* scaled length */
78      int desired_length;      int desired_length;     /* desired length; calcuated during encoding */
 } stat_t;  
   
   
79    
80        int zone_mode;   /* XVID_ZONE_xxx */
81        double weight;
82    } stat_t;
83    
84  /* context struct */  /* Context struct */
85  typedef struct  typedef struct
86  {  {
87      xvid_plugin_2pass2_t param;      xvid_plugin_2pass2_t param;
# Line 54  Line 89 
89      /* constant statistical data */      /* constant statistical data */
90      int num_frames;      int num_frames;
91      int num_keyframes;      int num_keyframes;
92        uint64_t target;    /* target filesize */
93    
94      int count[3];   /* count of each frame types */      int count[3];   /* count of each frame types */
95      uint64_t tot_length[3];  /* total length of each frame types */      uint64_t tot_length[3];  /* total length of each frame types */
# Line 62  Line 98 
98      uint64_t tot_scaled_length[3];  /* total scaled length of each frame type */      uint64_t tot_scaled_length[3];  /* total scaled length of each frame type */
99      int max_length;     /* max frame size */      int max_length;     /* max frame size */
100    
101        /* zone statistical data */
102        double avg_weight;  /* average weight */
103        int64_t tot_quant;   /* total length used by XVID_ZONE_QUANT zones */
104    
105    
106      double curve_comp_scale;      double curve_comp_scale;
107      double movie_curve;      double movie_curve;
108    
         double alt_curve_low;  
         double alt_curve_high;  
         double alt_curve_low_diff;  
         double alt_curve_high_diff;  
     double alt_curve_curve_bias_bonus;  
         double alt_curve_mid_qual;  
         double alt_curve_qual_dev;  
   
109      /* dynamic */      /* dynamic */
110    
111      int * keyframe_locations;      int * keyframe_locations;
# Line 88  Line 121 
121      int KFoverflow;      int KFoverflow;
122      int KFoverflow_partial;      int KFoverflow_partial;
123      int KF_idx;      int KF_idx;
 } rc_2pass2_t;  
   
   
124    
125  #define BUF_SZ 1024      double fq_error;
126  #define MAX_COLS    5  } rc_2pass2_t;
   
   
 /* open stats file, and count num frames */  
   
 static int det_stats_length(rc_2pass2_t * rc, char * filename)  
 {  
     FILE * f;  
     int n, ignore;  
     char type;  
   
     rc->num_frames = 0;  
     rc->num_keyframes = 0;  
   
     if ((f = fopen(filename, "rt")) == NULL)  
         return 0;  
   
     while((n = fscanf(f, "%c %d %d %d %d %d\n",  
         &type, &ignore, &ignore, &ignore, &ignore, &ignore)) != EOF) {  
         if (type == 'i') {  
             rc->num_frames++;  
             rc->num_keyframes++;  
         }else if (type == 'p' || type == 'b' || type == 's') {  
             rc->num_frames++;  
         }  
     }  
   
     fclose(f);  
127    
     return 1;  
 }  
128    
129    /*****************************************************************************
130     * Sub plugin functions prototypes
131     ****************************************************************************/
132    
133    static int rc_2pass2_create(xvid_plg_create_t * create, rc_2pass2_t ** handle);
134    static int rc_2pass2_before(rc_2pass2_t * rc, xvid_plg_data_t * data);
135    static int rc_2pass2_after(rc_2pass2_t * rc, xvid_plg_data_t * data);
136    static int rc_2pass2_destroy(rc_2pass2_t * rc, xvid_plg_destroy_t * destroy);
137    
138    /*****************************************************************************
139     * Plugin definition
140     ****************************************************************************/
141    
142  /* open stats file(s) and read into rc->stats array */  int
143    xvid_plugin_2pass2(void * handle, int opt, void * param1, void * param2)
 static int load_stats(rc_2pass2_t *rc, char * filename1, char * filename2)  
144  {  {
145      FILE * f1, *f2;      switch(opt) {
146      int i;      case XVID_PLG_INFO :
   
   
     if ((f1 = fopen(filename1, "rt"))==NULL)  
         return 0;  
   
     if ((f2 = fopen(filename2, "rt"))==NULL) {  
         fclose(f1);  
147          return 0;          return 0;
     }  
   
     i = 0;  
     while(i < rc->num_frames) {  
         stat_t * s = &rc->stats[i];  
         int n, ignore;  
         char type;  
   
         n = fscanf(f1, "%c %d %d %d %d %d\n", &type, &s->quant, &s->length, &ignore, &ignore, &ignore);  
         if (n == EOF) break;  
   
         if (type == 'i') {  
             s->type = XVID_TYPE_IVOP;  
         }else if (type == 'p' || type == 's') {  
             s->type = XVID_TYPE_PVOP;  
         }else if (type == 'b') {  
             s->type = XVID_TYPE_BVOP;  
         }else{  /* unknown type */  
             printf("unk\n");  
             continue;  
         }  
   
         n = fscanf(f2, "%c %d %d %d %d %d\n", &type, &ignore, &s->scaled_length, &ignore, &ignore, &ignore);  
         if (n == EOF) break;  
         if (type != 'i'&& type != 'p' && type != 'b' && type != 's') {  
             printf("unk\n");  
             continue; /* unknown type */  
         }  
   
         i++;  
     }  
     rc->num_frames = i;  
   
   
     fclose(f1);  
     if (filename2)  
         fclose(f2);  
   
     return 1;  
 }  
   
   
 /*static void internal_scale(rc_2pass2_t *rc)  
 {  
     const double avg_pvop = rc->avg_length[XVID_TYPE_PVOP-1];  
     const double avg_bvop = rc->avg_length[XVID_TYPE_BVOP-1];  
     const uint64_t tot_pvop = rc->tot_length[XVID_TYPE_PVOP-1];  
     const uint64_t tot_bvop = rc->tot_length[XVID_TYPE_BVOP-1];  
     uint64_t i_total = 0;  
         double total1,total2;  
     int i;  
   
     for (i=0; i<rc->num_frames; i++) {  
         stat_t * s = &rc->stats[i];  
   
                 if (s->type == XVID_TYPE_IVOP) {  
                         i_total += s->length + s->length * rc->param.keyframe_boost / 100;  
         }  
         }  
   
         // compensate for avi frame overhead  
         rc->target_size -= rc->num_frames * 24;  
   
         // perform prepass to compensate for over/undersizing  
   
         if (rc->param.use_alt_curve) {  
   
         rc->alt_curve_low = avg_pvop - avg_pvop * (double)rc->param.alt_curve_low_dist / 100.0;  
                 rc->alt_curve_low_diff = avg_pvop - rc->alt_curve_low;  
                 rc->alt_curve_high = avg_pvop + avg_pvop * (double)rc->param.alt_curve_high_dist / 100.0;  
                 rc->alt_curve_high_diff = rc->alt_curve_high - avg_pvop;  
                 if (rc->alt_curve_use_auto) {  
                         if (rc->movie_curve > 1.0) {  
                                 rc->param.alt_curve_min_rel_qual = (int)(100.0 - (100.0 - 100.0 / rc->movie_curve) * (double)rc->param.alt_curve_auto_str / 100.0);  
                                 if (rc->param.alt_curve_min_rel_qual < 20)  
                                         rc->param.alt_curve_min_rel_qual = 20;  
             }else{  
                                 rc->param.alt_curve_min_rel_qual = 100;  
             }  
                 }  
                 rc->alt_curve_mid_qual = (1.0 + (double)rc->param.alt_curve_min_rel_qual / 100.0) / 2.0;  
                 rc->alt_curve_qual_dev = 1.0 - rc->alt_curve_mid_qual;  
   
                 if (rc->param.alt_curve_low_dist > 100) {  
                         switch(rc->param.alt_curve_type) {  
                         case XVID_CURVE_SINE : // Sine Curve (high aggressiveness)  
                                 rc->alt_curve_qual_dev *= 2.0 / (1.0 + sin(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff)));  
                                 rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * sin(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff));  
                                 break;  
                         case XVID_CURVE_LINEAR : // Linear (medium aggressiveness)  
                                 rc->alt_curve_qual_dev *= 2.0 / (1.0 + avg_pvop / rc->alt_curve_low_diff);  
                                 rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * avg_pvop / rc->alt_curve_low_diff;  
                                 break;  
                         case XVID_CURVE_COSINE : // Cosine Curve (low aggressiveness)  
                                 rc->alt_curve_qual_dev *= 2.0 / (1.0 +  (1.0 - cos(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff))));  
                                 rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff)));  
                         }  
                 }  
         }  
   
         total1 = 0;  
         total2 = 0;  
   
     for (i=0; i<rc->num_frames; i++) {  
         stat_t * s = &rc->stats[i];  
   
                 if (s->type != XVID_TYPE_IVOP) {  
   
             double dbytes = s->length / rc->movie_curve;  
             double dbytes2;  
                         total1 += dbytes;  
   
                         if (s->type == XVID_TYPE_BVOP)  
                                 dbytes *= avg_pvop / avg_bvop;  
   
                         if (rc->param.use_alt_curve) {  
                                 if (dbytes > avg_pvop) {  
                     if (dbytes >= rc->alt_curve_high) {  
                                                 dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev);  
                     }else{  
                                                 switch(rc->param.alt_curve_type){  
                                                 case XVID_CURVE_SINE :  
                                                     dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - avg_pvop) * 90.0 / rc->alt_curve_high_diff)));  
                                                         break;  
                                                 case XVID_CURVE_LINEAR :  
                                                     dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - avg_pvop) / rc->alt_curve_high_diff);  
                                                         break;  
                                                 case XVID_CURVE_COSINE :  
                                                     dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - avg_pvop) * 90.0 / rc->alt_curve_high_diff))));  
                                                 }  
                                         }  
                                 }else{  
                     if (dbytes <= rc->alt_curve_low){  
                                                 dbytes2 = dbytes;  
                     }else{  
                                                 switch(rc->param.alt_curve_type){  
                                                 case XVID_CURVE_SINE :  
                                                     dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - avg_pvop) * 90.0 / rc->alt_curve_low_diff)));  
                                                         break;  
                                                 case XVID_CURVE_LINEAR :  
                                                     dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - avg_pvop) / rc->alt_curve_low_diff);  
                                                         break;  
                                                 case XVID_CURVE_COSINE :  
                                                     dbytes2 = dbytes * (rc->alt_curve_mid_qual + rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - avg_pvop) * 90.0 / rc->alt_curve_low_diff))));  
                                                 }  
                                         }  
                                 }  
                         }else{  
                 if (dbytes > avg_pvop) {  
                                         dbytes2 = ((double)dbytes + (avg_pvop - dbytes) *  
                                                 rc->param.curve_compression_high / 100.0);  
                                 }else{  
                                         dbytes2 = ((double)dbytes + (avg_pvop - dbytes) *  
                                                 rc->param.curve_compression_low / 100.0);  
                                 }  
                         }  
   
                         if (s->type == XVID_TYPE_BVOP) {  
                                 dbytes2 *= avg_bvop / avg_pvop;  
             }  
   
             if (dbytes2 < rc->min_length[s->type-1]) {  
                 dbytes = rc->min_length[s->type-1];  
             }  
   
             total2 += dbytes2;  
                 }  
         }  
   
         rc->curve_comp_scale = total1 / total2;  
   
         if (!rc->param.use_alt_curve) {  
                 printf("middle frame size for asymmetric curve compression: %i",  
             (int)(avg_pvop * rc->curve_comp_scale));  
         }  
 }*/  
   
   
   
   
 static void print_stats(rc_2pass2_t * rc)  
 {  
     int i;  
     for (i = 0; i < rc->num_frames; i++) {  
         stat_t * s = &rc->stats[i];  
         printf("%i %i %i %i\n", s->type, s->quant, s->length, s->scaled_length);  
   
     }  
 }  
   
   
 /* pre-process the statistics data  
     this is a clone of vfw/src/2pass.c:codec_2pass_init minus file reading, alt_curve, internal scale  
 */  
   
 void pre_process(rc_2pass2_t * rc)  
 {  
     int i,j;  
     double total1, total2;  
     uint64_t ivop_boost_total;  
   
     ivop_boost_total = 0;  
     rc->curve_comp_error = 0;  
   
     for (i=0; i<3; i++) {  
         rc->count[i]=0;  
         rc->tot_length[i] = 0;  
         rc->tot_scaled_length[i] = 0;  
         rc->last_quant[i] = 0;  
     }  
   
     for (i=0; i<32;i++) {  
         rc->pquant_error[i] = 0;  
         rc->bquant_error[i] = 0;  
         rc->quant_count[i] = 0;  
     }  
   
     for (i=j=0; i<rc->num_frames; i++) {  
         stat_t * s = &rc->stats[i];  
   
         rc->count[s->type-1]++;  
         rc->tot_length[s->type-1] += s->length;  
         rc->tot_scaled_length[s->type-1] += s->scaled_length;  
   
         if (i == 0 || s->length < rc->min_length[s->type-1]) {  
             rc->min_length[s->type-1] = s->length;  
         }  
   
         if (i == 0 || s->length > rc->max_length) {  
             rc->max_length = s->length;  
         }  
   
         if (s->type == XVID_TYPE_IVOP) {  
             ivop_boost_total += s->scaled_length * rc->param.keyframe_boost / 100;  
             rc->keyframe_locations[j] = i;  
             j++;  
         }  
     }  
     rc->keyframe_locations[j] = i;  
   
     rc->movie_curve = ((double)(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1] + ivop_boost_total) /  
                                         (rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1]));  
   
     for(i=0; i<3; i++) {  
         if (rc->count[i] == 0 || rc->movie_curve == 0) {  
             rc->avg_length[i] = 1;  
         }else{  
             rc->avg_length[i] = rc->tot_scaled_length[i] / rc->count[i] / rc->movie_curve;  
         }  
     }  
   
     printf("--\n");  
     /* alt curve stuff here */  
   
     if (rc->param.use_alt_curve) {  
         const double avg_pvop = rc->avg_length[XVID_TYPE_PVOP-1];  
         const uint64_t tot_pvop = rc->tot_length[XVID_TYPE_PVOP-1];  
         const uint64_t tot_bvop = rc->tot_length[XVID_TYPE_BVOP-1];  
         const uint64_t tot_scaled_pvop = rc->tot_scaled_length[XVID_TYPE_PVOP-1];  
         const uint64_t tot_scaled_bvop = rc->tot_scaled_length[XVID_TYPE_BVOP-1];  
   
                 rc->alt_curve_low = avg_pvop - avg_pvop * (double)rc->param.alt_curve_low_dist / 100.0;  
                 rc->alt_curve_low_diff = avg_pvop - rc->alt_curve_low;  
                 rc->alt_curve_high = avg_pvop + avg_pvop * (double)rc->param.alt_curve_high_dist / 100.0;  
                 rc->alt_curve_high_diff = rc->alt_curve_high - avg_pvop;  
   
         if (rc->param.alt_curve_use_auto) {  
             if (tot_bvop + tot_pvop > tot_scaled_bvop + tot_scaled_pvop) {  
                                 rc->param.alt_curve_min_rel_qual = (int)(100.0 - (100.0 - 100.0 /  
                                         ((double)(tot_pvop + tot_bvop) / (double)(tot_scaled_pvop + tot_scaled_bvop))) * (double)rc->param.alt_curve_auto_str / 100.0);  
   
                                 if (rc->param.alt_curve_min_rel_qual < 20)  
                                         rc->param.alt_curve_min_rel_qual = 20;  
             }else{  
                                 rc->param.alt_curve_min_rel_qual = 100;  
             }  
         }  
                 rc->alt_curve_mid_qual = (1.0 + (double)rc->param.alt_curve_min_rel_qual / 100.0) / 2.0;  
                 rc->alt_curve_qual_dev = 1.0 - rc->alt_curve_mid_qual;  
   
         if (rc->param.alt_curve_low_dist > 100) {  
                         switch(rc->param.alt_curve_type) {  
             case XVID_CURVE_SINE: // Sine Curve (high aggressiveness)  
                                 rc->alt_curve_qual_dev *= 2.0 / (1.0 + sin(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff)));  
                                 rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * sin(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff));  
                                 break;  
                         case XVID_CURVE_LINEAR: // Linear (medium aggressiveness)  
                                 rc->alt_curve_qual_dev *= 2.0 / (1.0 + avg_pvop / rc->alt_curve_low_diff);  
                                 rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * avg_pvop / rc->alt_curve_low_diff;  
                                 break;  
                         case XVID_CURVE_COSINE: // Cosine Curve (low aggressiveness)  
                                 rc->alt_curve_qual_dev *= 2.0 / (1.0 + (1.0 - cos(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff))));  
                                 rc->alt_curve_mid_qual = 1.0 - rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * (avg_pvop * 90.0 / rc->alt_curve_low_diff)));  
                         }  
                 }  
     }  
     /* --- */  
   
   
     total1=total2=0;  
     for (i=j=0; i<rc->num_frames; i++) {  
         stat_t * s = &rc->stats[i];  
   
         if (s->type != XVID_TYPE_IVOP) {  
             double dbytes,dbytes2;  
   
             dbytes = s->scaled_length / rc->movie_curve;  
             dbytes2 = 0; /* XXX: warning */  
             total1 += dbytes;  
             if (s->type == XVID_TYPE_BVOP)  
                 dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1];  
   
             if (rc->param.use_alt_curve) {  
                 if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) {  
   
                     if (dbytes >= rc->alt_curve_high) {  
                                                 dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev);  
                     }else{  
                                                 switch(rc->param.alt_curve_type) {  
                         case XVID_CURVE_SINE :  
                                                     dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_high_diff)));  
                                                         break;  
                         case XVID_CURVE_LINEAR :  
                                                     dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) / rc->alt_curve_high_diff);  
                                                         break;  
                                                 case XVID_CURVE_COSINE :  
                                                     dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_high_diff))));  
                                                 }  
                                         }  
                 }else{  
                     if (dbytes <= rc->alt_curve_low) {  
                                                 dbytes2 = dbytes;  
                     }else{  
                                                 switch(rc->param.alt_curve_type) {  
                                                 case XVID_CURVE_SINE :  
                                                     dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_low_diff)));  
                                                         break;  
                                                 case XVID_CURVE_LINEAR :  
                                                     dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) / rc->alt_curve_low_diff);  
                                                         break;  
                                                 case XVID_CURVE_COSINE :  
                                                     dbytes2 = dbytes * (rc->alt_curve_mid_qual + rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_low_diff))));  
                                                 }  
                                         }  
   
                 }  
   
   
             }else{  
                 if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) {  
                     dbytes2=((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_high / 100.0);  
                 }else{  
                                 dbytes2 = ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0);  
                 }  
             }  
148    
149              if (s->type == XVID_TYPE_BVOP) {      case XVID_PLG_CREATE :
150                              dbytes2 *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];          return rc_2pass2_create((xvid_plg_create_t*)param1, param2);
                             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];  
             }  
             total2 += dbytes2;  
         }  
     }  
   
     rc->curve_comp_scale = total1 / total2;  
   
     if (!rc->param.use_alt_curve) {  
         printf("middle frame size for asymmetric curve compression: %i\n",  
             (int)(rc->avg_length[XVID_TYPE_PVOP-1] * rc->curve_comp_scale));  
     }  
   
     if (rc->param.use_alt_curve) {  
         int bonus_bias = rc->param.alt_curve_bonus_bias;  
         int oldquant = 1;  
   
             if (rc->param.alt_curve_use_auto_bonus_bias)  
                     bonus_bias = rc->param.alt_curve_min_rel_qual;  
   
             rc->alt_curve_curve_bias_bonus = (total1 - total2) * (double)bonus_bias / 100.0 / (double)(rc->num_frames /* - credits_frames */ - rc->num_keyframes);  
             rc->curve_comp_scale = ((total1 - total2) * (1.0 - (double)bonus_bias / 100.0) + total2) / total2;  
   
   
         /* special info for alt curve:  bias bonus and quantizer thresholds */  
   
                 printf("avg scaled framesize:%i", (int)rc->avg_length[XVID_TYPE_PVOP-1]);  
                 printf("bias bonus:%i bytes", (int)rc->alt_curve_curve_bias_bonus);  
   
                 for (i=1; i <= (int)(rc->alt_curve_high*2)+1; i++) {  
             double curve_temp, dbytes;  
             int newquant;  
   
             dbytes = i;  
                         if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) {  
                 if (dbytes >= rc->alt_curve_high) {  
                                         curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev);  
                 }else{  
                                         switch(rc->param.alt_curve_type)  
                                         {  
                                         case XVID_CURVE_SINE :  
                                                 curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_high_diff)));  
                                                 break;  
                                         case XVID_CURVE_LINEAR :  
                                                 curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) / rc->alt_curve_high_diff);  
                                                 break;  
                                         case XVID_CURVE_COSINE :  
                                                 curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_high_diff))));  
                                         }  
                                 }  
                         }else{  
                 if (dbytes <= rc->alt_curve_low) {  
                                         curve_temp = dbytes;  
                 }else{  
                                         switch(rc->param.alt_curve_type)  
                                         {  
                                         case XVID_CURVE_SINE :  
                                                 curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_low_diff)));  
                                                 break;  
                                         case XVID_CURVE_LINEAR :  
                                                 curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) / rc->alt_curve_low_diff);  
                                                 break;  
                                         case XVID_CURVE_COSINE :  
                                                 curve_temp = dbytes * (rc->alt_curve_mid_qual + rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_low_diff))));  
                                         }  
                                 }  
                         }  
151    
152                          if (rc->movie_curve > 1.0)      case XVID_PLG_DESTROY :
153                                  dbytes *= rc->movie_curve;          return rc_2pass2_destroy((rc_2pass2_t*)handle, (xvid_plg_destroy_t*)param1);
154    
155                          newquant = (int)(dbytes * 2.0 / (curve_temp * rc->curve_comp_scale + rc->alt_curve_curve_bias_bonus));      case XVID_PLG_BEFORE :
156                          if (newquant > 1) {          return rc_2pass2_before((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1);
                                 if (newquant != oldquant) {  
                     int percent = (int)((i - rc->avg_length[XVID_TYPE_PVOP-1]) * 100.0 / rc->avg_length[XVID_TYPE_PVOP-1]);  
                                         oldquant = newquant;  
                                         printf("quant:%i threshold at %i : %i percent", newquant, i, percent);  
                                 }  
                         }  
                 }  
157    
158        case XVID_PLG_AFTER :
159            return rc_2pass2_after((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1);
160      }      }
161    
162      rc->overflow = 0;      return XVID_ERR_FAIL;
     rc->KFoverflow = 0;  
     rc->KFoverflow_partial = 0;  
     rc->KF_idx = 1;  
163  }  }
164    
165    /*****************************************************************************
166     * Sub plugin functions definitions
167     ****************************************************************************/
168    
169    /* First a few local helping function prototypes */
170    static  int det_stats_length(rc_2pass2_t * rc, char * filename);
171    static  int load_stats(rc_2pass2_t *rc, char * filename);
172    static void zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create);
173    static void internal_scale(rc_2pass2_t *rc);
174    static void pre_process0(rc_2pass2_t * rc);
175    static void pre_process1(rc_2pass2_t * rc);
176    
177    /*----------------------------------------------------------------------------
178     *--------------------------------------------------------------------------*/
179    
180    static int
181  static int rc_2pass2_create(xvid_plg_create_t * create, rc_2pass2_t ** handle)  rc_2pass2_create(xvid_plg_create_t * create, rc_2pass2_t **handle)
182  {  {
183      xvid_plugin_2pass2_t * param = (xvid_plugin_2pass2_t *)create->param;      xvid_plugin_2pass2_t * param = (xvid_plugin_2pass2_t *)create->param;
184      rc_2pass2_t * rc;      rc_2pass2_t * rc;
185        int i;
186    
187      rc = malloc(sizeof(rc_2pass2_t));      rc = malloc(sizeof(rc_2pass2_t));
188      if (rc == NULL)      if (rc == NULL)
# Line 605  Line 190 
190    
191      rc->param = *param;      rc->param = *param;
192    
193      if (rc->param.keyframe_boost <= 0) rc->param.keyframe_boost = 0;  #define _INIT(a, b) if((a) <= 0) (a) = (b)
194      if (rc->param.payback_method <= 0) rc->param.payback_method = XVID_PAYBACK_PROP;      /* Let's set our defaults if needed */
195      if (rc->param.bitrate_payback_delay <= 0) rc->param.bitrate_payback_delay = 250;          _INIT(rc->param.keyframe_boost, DEFAULT_KEYFRAME_BOOST);
196      if (rc->param.curve_compression_high <= 0) rc->param.curve_compression_high = 0;          _INIT(rc->param.payback_method, DEFAULT_PAYBACK_METHOD);
197      if (rc->param.curve_compression_low <= 0) rc->param.curve_compression_low = 0;          _INIT(rc->param.bitrate_payback_delay, DEFAULT_BITRATE_PAYBACK_DELAY);
198      if (rc->param.max_overflow_improvement <= 0) rc->param.max_overflow_improvement = 60;      _INIT(rc->param.curve_compression_high, DEFAULT_CURVE_COMPRESSION_HIGH);
199      if (rc->param.max_overflow_degradation <= 0) rc->param.max_overflow_degradation = 60;      _INIT(rc->param.curve_compression_low, DEFAULT_CURVE_COMPRESSION_LOW);
200      if (rc->param.min_quant[0] <= 0) rc->param.min_quant[0] = 2;      _INIT(rc->param.max_overflow_improvement, DEFAULT_MAX_OVERFLOW_IMPROVEMENT);
201      if (rc->param.max_quant[0] <= 0) rc->param.max_quant[0] = 31;      _INIT(rc->param.max_overflow_degradation,  DEFAULT_MAX_OVERFLOW_DEGRADATION);
202      if (rc->param.min_quant[1] <= 0) rc->param.min_quant[1] = 2;  
203      if (rc->param.max_quant[1] <= 0) rc->param.max_quant[1] = 31;      /* Keyframe settings */
204      if (rc->param.min_quant[2] <= 0) rc->param.min_quant[2] = 2;          _INIT(rc->param.kftreshold, DEFAULT_KFTRESHOLD);
205      if (rc->param.max_quant[2] <= 0) rc->param.max_quant[2] = 31;      _INIT(rc->param.kfreduction, DEFAULT_KFREDUCTION);
206        _INIT(rc->param.min_key_interval, DEFAULT_MIN_KEY_INTERVAL);
207      if (rc->param.use_alt_curve <= 0) rc->param.use_alt_curve = 0;  #undef _INIT
208      if (rc->param.alt_curve_high_dist <= 0) rc->param.alt_curve_high_dist = 500;  
209      if (rc->param.alt_curve_low_dist <= 0) rc->param.alt_curve_low_dist = 90;          /* Count frames in the stats file */
210      if (rc->param.alt_curve_use_auto <= 0) rc->param.alt_curve_use_auto = 1;      if (!det_stats_length(rc, param->filename)) {
211      if (rc->param.alt_curve_auto_str <= 0) rc->param.alt_curve_auto_str = 30;          DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename);
     if (rc->param.alt_curve_type <= 0) rc->param.alt_curve_type = XVID_CURVE_LINEAR;  
     if (rc->param.alt_curve_min_rel_qual <= 0) rc->param.alt_curve_min_rel_qual = 50;  
     if (rc->param.alt_curve_use_auto_bonus_bias <= 0) rc->param.alt_curve_use_auto_bonus_bias = 1;  
     if (rc->param.alt_curve_bonus_bias <= 0) rc->param.alt_curve_bonus_bias = 50;  
   
     if (rc->param.kftreshold <= 0) rc->param.kftreshold = 10;  
     if (rc->param.kfreduction <= 0) rc->param.kfreduction = 20;  
     if (rc->param.min_key_interval <= 0) rc->param.min_key_interval = 300;  
   
     if (!det_stats_length(rc, param->filename1)){  
         DPRINTF(DPRINTF_RC,"fopen %s failed\n", param->filename1);  
212          free(rc);          free(rc);
213          return XVID_ERR_FAIL;          return XVID_ERR_FAIL;
214      }      }
215    
216        /* Allocate the stats' memory */
217      if ((rc->stats = malloc(rc->num_frames * sizeof(stat_t))) == NULL) {      if ((rc->stats = malloc(rc->num_frames * sizeof(stat_t))) == NULL) {
218          free(rc);          free(rc);
219          return XVID_ERR_MEMORY;          return XVID_ERR_MEMORY;
220      }      }
221    
222      /* XXX: do we need an addition location */      /*
223             * Allocate keyframes location's memory
224             * PS: see comment in pre_process0 for the +1 location requirement
225             */
226      if ((rc->keyframe_locations = malloc((rc->num_keyframes + 1) * sizeof(int))) == NULL) {      if ((rc->keyframe_locations = malloc((rc->num_keyframes + 1) * sizeof(int))) == NULL) {
227          free(rc->stats);          free(rc->stats);
228          free(rc);          free(rc);
229          return XVID_ERR_MEMORY;          return XVID_ERR_MEMORY;
230      }      }
231    
232      if (!load_stats(rc, param->filename1, param->filename2)) {      if (!load_stats(rc, param->filename)) {
233          DPRINTF(DPRINTF_RC,"fopen %s,%s failed\n", param->filename1, param->filename2);          DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename);
234          free(rc->keyframe_locations);          free(rc->keyframe_locations);
235          free(rc->stats);          free(rc->stats);
236          free(rc);          free(rc);
# Line 660  Line 238 
238      }      }
239    
240      /* pre-process our stats */      /* pre-process our stats */
241      pre_process(rc);  
242            if (rc->num_frames  < create->fbase/create->fincr) {
243                    rc->target = rc->param.bitrate / 8;     /* one second */
244            } else {
245                    rc->target =
246                            ((uint64_t)rc->param.bitrate * (uint64_t)rc->num_frames * (uint64_t)create->fincr) / \
247                            ((uint64_t)create->fbase * 8);
248            }
249    
250        DPRINTF(XVID_DEBUG_RC, "Number of frames: %d\n", rc->num_frames);
251            DPRINTF(XVID_DEBUG_RC, "Frame rate: %d/%d\n", create->fbase, create->fincr);
252            DPRINTF(XVID_DEBUG_RC, "Target bitrate: %ld\n", rc->param.bitrate);
253            DPRINTF(XVID_DEBUG_RC, "Target filesize: %lld\n", rc->target);
254    
255            /* Compensate the mean frame overhead caused by the container */
256            rc->target -= rc->num_frames*rc->param.container_frame_overhead;
257            DPRINTF(XVID_DEBUG_RC, "Container Frame overhead: %d\n", rc->param.container_frame_overhead);
258            DPRINTF(XVID_DEBUG_RC, "Target filesize (after container compensation): %lld\n", rc->target);
259    
260            pre_process0(rc);
261    
262            if (rc->param.bitrate) {
263            zone_process(rc, create);
264                    internal_scale(rc);
265        }else{
266            /* external scaler: ignore zone */
267            for (i=0;i<rc->num_frames;i++) {
268                rc->stats[i].zone_mode = XVID_ZONE_WEIGHT;
269                rc->stats[i].weight = 1.0;
270            }
271            rc->avg_weight = 1.0;
272            rc->tot_quant = 0;
273        }
274            pre_process1(rc);
275    
276        for (i=0; i<32;i++) {
277            rc->pquant_error[i] = 0;
278            rc->bquant_error[i] = 0;
279            rc->quant_count[i] = 0;
280        }
281    
282        rc->fq_error = 0;
283    
284      *handle = rc;      *handle = rc;
285          return(0);          return(0);
286  }  }
287    
288    /*----------------------------------------------------------------------------
289     *--------------------------------------------------------------------------*/
290    
291  static int rc_2pass2_destroy(rc_2pass2_t * rc, xvid_plg_destroy_t * destroy)  static int
292    rc_2pass2_destroy(rc_2pass2_t * rc, xvid_plg_destroy_t * destroy)
293  {  {
294      free(rc->keyframe_locations);      free(rc->keyframe_locations);
295      free(rc->stats);      free(rc->stats);
# Line 675  Line 297 
297          return(0);          return(0);
298  }  }
299    
300    /*----------------------------------------------------------------------------
301     *--------------------------------------------------------------------------*/
302    
303    static int
304  static int rc_2pass2_before(rc_2pass2_t * rc, xvid_plg_data_t * data)  rc_2pass2_before(rc_2pass2_t * rc, xvid_plg_data_t * data)
305  {  {
306      stat_t * s = &rc->stats[data->frame_num];      stat_t * s = &rc->stats[data->frame_num];
307      int overflow;      int overflow;
# Line 686  Line 310 
310      double curve_temp;      double curve_temp;
311      int capped_to_max_framesize = 0;      int capped_to_max_framesize = 0;
312    
313      if (data->frame_num >= rc->num_frames) {          /*
314          /* insufficent stats data */           * This function is quite long but easy to understand. In order to simplify
315          return 0;           * the code path (a bit), we treat 3 cases that can return immediatly.
316             */
317    
318            /* First case: Another plugin has already set a quantizer */
319        if (data->quant > 0)
320                    return(0);
321    
322            /* Second case: We are in a Quant zone */
323            if (s->zone_mode == XVID_ZONE_QUANT) {
324    
325                    rc->fq_error += s->weight;
326                    data->quant = (int)rc->fq_error;
327                    rc->fq_error -= data->quant;
328    
329                    s->desired_length = s->length;
330    
331                    return(0);
332    
333      }      }
334    
335      overflow = rc->overflow / 8;        /* XXX: why by 8 */          /* Third case: insufficent stats data */
336            if (data->frame_num >= rc->num_frames)
337                    return 0;
338    
339            /*
340             * The last case is the one every normal minded developer should fear to
341             * maintain in a project :-)
342             */
343    
344            /* XXX: why by 8 */
345            overflow = rc->overflow / 8;
346    
347      if (s->type == XVID_TYPE_IVOP) {        /* XXX: why */          /*
348             * The rc->overflow field represents the overflow in current scene (between two
349             * IFrames) so we must not forget to reset it if we are entering a new scene
350             */
351            if (s->type == XVID_TYPE_IVOP)
352          overflow = 0;          overflow = 0;
     }  
353    
354      desired = s->scaled_length;      desired = s->scaled_length;
355    
356      dbytes = desired;      dbytes = desired;
357      if (s->type == XVID_TYPE_IVOP) {          if (s->type == XVID_TYPE_IVOP)
358          dbytes += desired * rc->param.keyframe_boost / 100;          dbytes += desired * rc->param.keyframe_boost / 100;
     }  
359      dbytes /= rc->movie_curve;      dbytes /= rc->movie_curve;
360    
361      if (s->type == XVID_TYPE_BVOP) {          /*
362             * We are now entering in the hard part of the algo, it was first designed
363             * to work with i/pframes only streams, so the way it computes things is
364             * adapted to pframes only. However we can use it if we just take care to
365             * scale the bframes sizes to pframes sizes using the ratio avg_p/avg_p and
366             * then before really using values depending on frame sizes, scaling the
367             * value again with the inverse ratio
368             */
369            if (s->type == XVID_TYPE_BVOP)
370          dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1];          dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1];
     }  
371    
372            /*
373             * Apply user's choosen Payback method. Payback helps bitrate to follow the
374             * scaled curve "paying back" past errors in curve previsions.
375             */
376      if (rc->param.payback_method == XVID_PAYBACK_BIAS) {      if (rc->param.payback_method == XVID_PAYBACK_BIAS) {
377          desired =(int)(rc->curve_comp_error / rc->param.bitrate_payback_delay);          desired =(int)(rc->curve_comp_error / rc->param.bitrate_payback_delay);
378      }else{      }else{
# Line 722  Line 386 
386    
387      rc->curve_comp_error -= desired;      rc->curve_comp_error -= desired;
388    
389      /* alt curve */          /*
390             * Alt curve treatment is not that hard to understand though the formulas
391      curve_temp = 0; /* XXX: warning */           * seem to be huge. Alt treatment is basically a way to soft/harden the
392             * curve flux applying sine/linear/cosine ratios
393      if (rc->param.use_alt_curve) {           */
         if (s->type != XVID_TYPE_IVOP)  {  
             if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) {  
                 if (dbytes >= rc->alt_curve_high) {  
                                         curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev);  
                 }else{  
                     switch(rc->param.alt_curve_type) {  
                                         case XVID_CURVE_SINE :  
                                             curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_high_diff)));  
                                                 break;  
                                         case XVID_CURVE_LINEAR :  
                                             curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) / rc->alt_curve_high_diff);  
                                                 break;  
                                         case XVID_CURVE_COSINE :  
                                             curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_high_diff))));  
                                         }  
                                 }  
                         }else{  
                 if (dbytes <= rc->alt_curve_low){  
                                         curve_temp = dbytes;  
                 }else{  
                                         switch(rc->param.alt_curve_type) {  
                                         case XVID_CURVE_SINE :  
                                             curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * sin(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_low_diff)));  
                                                 break;  
                                         case XVID_CURVE_LINEAR :  
                                             curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev * (dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) / rc->alt_curve_low_diff);  
                                                 break;  
                                         case XVID_CURVE_COSINE :  
                                             curve_temp = dbytes * (rc->alt_curve_mid_qual + rc->alt_curve_qual_dev * (1.0 - cos(DEG2RAD * ((dbytes - rc->avg_length[XVID_TYPE_PVOP-1]) * 90.0 / rc->alt_curve_low_diff))));  
                     }  
                                 }  
                         }  
                         if (s->type == XVID_TYPE_BVOP)  
                                 curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];  
394    
395                          curve_temp = curve_temp * rc->curve_comp_scale + rc->alt_curve_curve_bias_bonus;          /* XXX: warning */
396            curve_temp = 0;
397    
398                          desired += ((int)curve_temp);          if ((rc->param.curve_compression_high + rc->param.curve_compression_low) &&     s->type != XVID_TYPE_IVOP) {
                         rc->curve_comp_error += curve_temp - (int)curve_temp;  
                 }else{  
                         if (s->type == XVID_TYPE_BVOP)  
                                 dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];  
   
                         desired += ((int)dbytes);  
                         rc->curve_comp_error += dbytes - (int)dbytes;  
                 }  
   
     }else 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[XVID_TYPE_PVOP-1]) {
# Line 783  Line 404 
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[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0);
405          }          }
406    
407          if (s->type == XVID_TYPE_BVOP){                  /*
408                     * End of code path for curve_temp, as told earlier, we are now
409                     * obliged to scale the value to a bframe one using the inverse
410                     * ratio applied earlier
411                     */
412                    if (s->type == XVID_TYPE_BVOP)
413              curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];              curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];
         }  
414    
415          desired += (int)curve_temp;          desired += (int)curve_temp;
416          rc->curve_comp_error += curve_temp - (int)curve_temp;          rc->curve_comp_error += curve_temp - (int)curve_temp;
417      }else{      }else{
418          if (s->type == XVID_TYPE_BVOP){                  /*
419                     * End of code path for dbytes, as told earlier, we are now
420                     * obliged to scale the value to a bframe one using the inverse
421                     * ratio applied earlier
422                     */
423                    if (s->type == XVID_TYPE_BVOP)
424                          dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];                          dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];
         }  
425    
426                  desired += (int)dbytes;                  desired += (int)dbytes;
427                  rc->curve_comp_error += dbytes - (int)dbytes;                  rc->curve_comp_error += dbytes - (int)dbytes;
428      }      }
429    
430    
431            /*
432             * We can't do bigger frames than first pass, this would be stupid as first
433             * pass is quant=2 and that reaching quant=1 is not worth it. We would lose
434             * many bytes and we would not not gain much quality.
435             */
436          if (desired > s->length){          if (desired > s->length){
437                  rc->curve_comp_error += desired - s->length;                  rc->curve_comp_error += desired - s->length;
438                  desired = s->length;                  desired = s->length;
# Line 821  Line 456 
456    
457          if (KFdistance < rc->param.kftreshold) {          if (KFdistance < rc->param.kftreshold) {
458    
459              KFdistance = KFdistance - rc->param.min_key_interval;                          KFdistance -= rc->param.min_key_interval;
460    
461                          if (KFdistance >= 0) {                          if (KFdistance >= 0) {
462                  int KF_min_size;                  int KF_min_size;
# Line 841  Line 476 
476    
477      overflow = (int)((double)overflow * desired / rc->avg_length[XVID_TYPE_PVOP-1]);      overflow = (int)((double)overflow * desired / rc->avg_length[XVID_TYPE_PVOP-1]);
478    
479          // Foxer: reign in overflow with huge frames          /* Reign in overflow with huge frames */
480          if (labs(overflow) > labs(rc->overflow)) {          if (labs(overflow) > labs(rc->overflow))
481                  overflow = rc->overflow;                  overflow = rc->overflow;
         }  
   
     // Foxer: make sure overflow doesn't run away  
482    
483            /* Make sure overflow doesn't run away */
484          if (overflow > desired * rc->param.max_overflow_improvement / 100) {          if (overflow > desired * rc->param.max_overflow_improvement / 100) {
485                  desired += (overflow <= desired) ? desired * rc->param.max_overflow_improvement / 100 :                  desired += (overflow <= desired) ? desired * rc->param.max_overflow_improvement / 100 :
486                          overflow * rc->param.max_overflow_improvement / 100;                          overflow * rc->param.max_overflow_improvement / 100;
# Line 857  Line 490 
490                  desired += overflow;                  desired += overflow;
491          }          }
492    
493            /* Make sure we are not higher than desired frame size */
494      if (desired > rc->max_length) {      if (desired > rc->max_length) {
495                  capped_to_max_framesize = 1;                  capped_to_max_framesize = 1;
496                  desired = rc->max_length;                  desired = rc->max_length;
497                    DPRINTF(XVID_DEBUG_RC,"[%i] Capped to maximum frame size\n",
498                                    data->frame_num);
499          }          }
500    
501      // make sure to not scale below the minimum framesize          /* Make sure to not scale below the minimum framesize */
502      if (desired < rc->min_length[s->type-1]) {      if (desired < rc->min_length[s->type-1]) {
503          desired = rc->min_length[s->type-1];          desired = rc->min_length[s->type-1];
504                    DPRINTF(XVID_DEBUG_RC,"[%i] Capped to minimum frame size\n",
505                                    data->frame_num);
506      }      }
507    
508            /*
509             * Don't laugh at this very 'simple' quant<->filesize relationship, it
510             * proves to be acurate enough for our algorithm
511             */
512            data->quant = s->quant*s->length/desired;
513    
514      // very 'simple' quant<->filesize relationship          /* Let's clip the computed quantizer, if needed */
     data->quant= (s->quant * s->length) / desired;  
   
515          if (data->quant < 1) {          if (data->quant < 1) {
516                  data->quant = 1;                  data->quant = 1;
517      } else if (data->quant > 31) {      } else if (data->quant > 31) {
518                  data->quant = 31;                  data->quant = 31;
519          }          } else if (s->type != XVID_TYPE_IVOP) {
520          else if (s->type != XVID_TYPE_IVOP)  
521          {                  /*
522                  // Foxer: aid desired quantizer precision by accumulating decision error                   * The frame quantizer has not been clipped, this appear to be a good
523                     * computed quantizer, however past frames give us some info about how
524                     * this quantizer performs against the algo prevision. Let's use this
525                     * prevision to increase the quantizer when we observe a too big
526                     * accumulated error
527                     */
528                  if (s->type== XVID_TYPE_BVOP) {                  if (s->type== XVID_TYPE_BVOP) {
529                          rc->bquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant;                          rc->bquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant;
530    
# Line 891  Line 537 
537    
538              if (rc->pquant_error[data->quant] >= 1.0) {              if (rc->pquant_error[data->quant] >= 1.0) {
539                                  rc->pquant_error[data->quant] -= 1.0;                                  rc->pquant_error[data->quant] -= 1.0;
540                                  ++data->quant;                                  data->quant++;
541                          }                          }
542                  }                  }
543          }          }
544    
545      /* cap to min/max quant */          /*
546             * Now we have a computed quant that is in the right quante range, with a
547      if (data->quant < rc->param.min_quant[s->type-1]) {           * possible +1 correction due to cumulated error. We can now safely clip
548          data->quant = rc->param.min_quant[s->type-1];           * the quantizer again with user's quant ranges. "Safely" means the Rate
549      }else if (data->quant > rc->param.max_quant[s->type-1]) {           * Control could learn more about this quantizer, this knowledge is useful
550          data->quant = rc->param.max_quant[s->type-1];           * for future frames even if it this quantizer won't be really used atm,
551             * that's why we don't perform this clipping earlier.
552             */
553            if (data->quant < data->min_quant[s->type-1]) {
554                    data->quant = data->min_quant[s->type-1];
555            } else if (data->quant > data->max_quant[s->type-1]) {
556                    data->quant = data->max_quant[s->type-1];
557      }      }
558    
559      /* subsequent p/b frame quants can only be +- 2 */          /*
560             * To avoid big quality jumps from frame to frame, we apply a "security"
561             * rule that makes |last_quant - new_quant| <= 2. This rule only applies
562             * to predicted frames (P and B)
563             */
564          if (s->type != XVID_TYPE_IVOP && rc->last_quant[s->type-1] && capped_to_max_framesize == 0) {          if (s->type != XVID_TYPE_IVOP && rc->last_quant[s->type-1] && capped_to_max_framesize == 0) {
565    
566                  if (data->quant > rc->last_quant[s->type-1] + 2) {                  if (data->quant > rc->last_quant[s->type-1] + 2) {
567                          data->quant = rc->last_quant[s->type-1] + 2;                          data->quant = rc->last_quant[s->type-1] + 2;
568                          DPRINTF(DPRINTF_RC, "p/b-frame quantizer prevented from rising too steeply");                          DPRINTF(XVID_DEBUG_RC,
569                                            "[%i] p/b-frame quantizer prevented from rising too steeply\n",
570                                            data->frame_num);
571                  }                  }
572                  if (data->quant < rc->last_quant[s->type-1] - 2) {                  if (data->quant < rc->last_quant[s->type-1] - 2) {
573                          data->quant = rc->last_quant[s->type-1] - 2;                          data->quant = rc->last_quant[s->type-1] - 2;
574                          DPRINTF(DPRINTF_RC, "p/b-frame quantizer prevented from falling too steeply");                          DPRINTF(XVID_DEBUG_RC,
575                                            "[%i] p/b-frame quantizer prevented from falling too steeply\n",
576                                            data->frame_num);
577                  }                  }
578          }          }
579    
580          if (capped_to_max_framesize == 0) {          /*
581             * We don't want to pollute the RC history results when our computed quant
582             * has been computed from a capped frame size
583             */
584            if (capped_to_max_framesize == 0)
585          rc->last_quant[s->type-1] = data->quant;          rc->last_quant[s->type-1] = data->quant;
         }  
586    
587          return 0;          return 0;
588  }  }
589    
590    /*----------------------------------------------------------------------------
591     *--------------------------------------------------------------------------*/
592    
593    static int
594  static int rc_2pass2_after(rc_2pass2_t * rc, xvid_plg_data_t * data)  rc_2pass2_after(rc_2pass2_t * rc, xvid_plg_data_t * data)
595  {  {
596            const char frame_type[4] = { 'i', 'p', 'b', 's'};
597      stat_t * s = &rc->stats[data->frame_num];      stat_t * s = &rc->stats[data->frame_num];
598    
599      if (data->frame_num >= rc->num_frames) {          /* Insufficent stats data */
600          /* insufficent stats data */      if (data->frame_num >= rc->num_frames)
601          return 0;          return 0;
     }  
602    
603      rc->quant_count[data->quant]++;      rc->quant_count[data->quant]++;
604    
# Line 957  Line 622 
622          rc->KFoverflow -= rc->KFoverflow_partial;          rc->KFoverflow -= rc->KFoverflow_partial;
623      }      }
624    
625      printf("[%i] quant:%i stats1:%i scaled:%i actual:%i overflow:%i\n",          DPRINTF(XVID_DEBUG_RC, "[%i] type:%c quant:%i stats1:%i scaled:%i actual:%i overflow:%i\n",
626          data->frame_num,          data->frame_num,
627                            frame_type[data->type-1],
628          data->quant,          data->quant,
629          s->length,          s->length,
630          s->scaled_length,          s->scaled_length,
# Line 968  Line 634 
634      return(0);      return(0);
635  }  }
636    
637    /*****************************************************************************
638     * Helper functions definition
639     ****************************************************************************/
640    
641    #define BUF_SZ   1024
642    #define MAX_COLS 5
643    
644  int xvid_plugin_2pass2(void * handle, int opt, void * param1, void * param2)  /* open stats file, and count num frames */
645    static int
646    det_stats_length(rc_2pass2_t * rc, char * filename)
647  {  {
648      switch(opt)      FILE * f;
649        int n, ignore;
650        char type;
651    
652        rc->num_frames = 0;
653        rc->num_keyframes = 0;
654    
655        if ((f = fopen(filename, "rt")) == NULL)
656            return 0;
657    
658        while((n = fscanf(f, "%c %d %d %d %d %d %d\n",
659            &type, &ignore, &ignore, &ignore, &ignore, &ignore, &ignore)) != EOF) {
660            if (type == 'i') {
661                rc->num_frames++;
662                rc->num_keyframes++;
663            }else if (type == 'p' || type == 'b' || type == 's') {
664                rc->num_frames++;
665            }
666        }
667    
668        fclose(f);
669    
670        return 1;
671    }
672    
673    /* open stats file(s) and read into rc->stats array */
674    
675    static int
676    load_stats(rc_2pass2_t *rc, char * filename)
677      {      {
678      case XVID_PLG_INFO :      FILE * f;
679        int i, not_scaled;
680    
681    
682        if ((f = fopen(filename, "rt"))==NULL)
683          return 0;          return 0;
684    
685      case XVID_PLG_CREATE :      i = 0;
686          return rc_2pass2_create((xvid_plg_create_t*)param1, param2);          not_scaled = 0;
687        while(i < rc->num_frames) {
688            stat_t * s = &rc->stats[i];
689            int n;
690            char type;
691    
692      case XVID_PLG_DESTROY :                  s->scaled_length = 0;
693          return rc_2pass2_destroy((rc_2pass2_t*)handle, (xvid_plg_destroy_t*)param1);          n = fscanf(f, "%c %d %d %d %d %d %d\n", &type, &s->quant, &s->blks[0], &s->blks[1], &s->blks[2], &s->length, &s->scaled_length);
694            if (n == EOF) break;
695                    if (n < 7) {
696                            not_scaled = 1;
697                    }
698    
699      case XVID_PLG_BEFORE :          if (type == 'i') {
700          return rc_2pass2_before((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1);              s->type = XVID_TYPE_IVOP;
701            }else if (type == 'p' || type == 's') {
702                s->type = XVID_TYPE_PVOP;
703            }else if (type == 'b') {
704                s->type = XVID_TYPE_BVOP;
705            }else{  /* unknown type */
706                DPRINTF(XVID_DEBUG_RC, "unknown stats frame type; assuming pvop\n");
707                s->type = XVID_TYPE_PVOP;
708            }
709    
710      case XVID_PLG_AFTER :          i++;
         return rc_2pass2_after((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1);  
711      }      }
712    
713      return XVID_ERR_FAIL;      rc->num_frames = i;
714    
715            fclose(f);
716    
717        return 1;
718    }
719    
720    #if 0
721    static void print_stats(rc_2pass2_t * rc)
722    {
723        int i;
724        DPRINTF(XVID_DEBUG_RC, "type quant length scaled_length\n");
725            for (i = 0; i < rc->num_frames; i++) {
726            stat_t * s = &rc->stats[i];
727            DPRINTF(XVID_DEBUG_RC, "%d %d %d %d\n", s->type, s->quant, s->length, s->scaled_length);
728        }
729    }
730    #endif
731    
732    /* pre-process the statistics data
733        - for each type, count, tot_length, min_length, max_length
734        - set keyframes_locations
735    */
736    
737    static void
738    pre_process0(rc_2pass2_t * rc)
739    {
740        int i,j;
741    
742        for (i=0; i<3; i++) {
743            rc->count[i]=0;
744            rc->tot_length[i] = 0;
745            rc->last_quant[i] = 0;
746                    rc->min_length[i] = INT_MAX;
747        }
748    
749            rc->max_length = INT_MIN;
750    
751        for (i=j=0; i<rc->num_frames; i++) {
752            stat_t * s = &rc->stats[i];
753    
754            rc->count[s->type-1]++;
755            rc->tot_length[s->type-1] += s->length;
756    
757            if (s->length < rc->min_length[s->type-1]) {
758                rc->min_length[s->type-1] = s->length;
759            }
760    
761            if (s->length > rc->max_length) {
762                rc->max_length = s->length;
763            }
764    
765            if (s->type == XVID_TYPE_IVOP) {
766                rc->keyframe_locations[j] = i;
767                j++;
768            }
769        }
770    
771            /*
772             * Nota Bene:
773             * The "per sequence" overflow system considers a natural sequence to be
774             * formed by all frames between two iframes, so if we want to make sure
775             * the system does not go nuts during last sequence, we force the last
776             * frame to appear in the keyframe locations array.
777             */
778        rc->keyframe_locations[j] = i;
779    
780            DPRINTF(XVID_DEBUG_RC, "Min 1st pass IFrame length: %d\n", rc->min_length[0]);
781            DPRINTF(XVID_DEBUG_RC, "Min 1st pass PFrame length: %d\n", rc->min_length[1]);
782            DPRINTF(XVID_DEBUG_RC, "Min 1st pass BFrame length: %d\n", rc->min_length[2]);
783    }
784    
785    /* calculate zone weight "center" */
786    
787    static void
788    zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create)
789    {
790        int i,j;
791        int n = 0;
792    
793        rc->avg_weight = 0.0;
794        rc->tot_quant = 0;
795    
796    
797        if (create->num_zones == 0) {
798            for (j = 0; j < rc->num_frames; j++) {
799                rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;
800                rc->stats[j].weight = 1.0;
801            }
802            rc->avg_weight += rc->num_frames * 1.0;
803            n += rc->num_frames;
804        }
805    
806    
807        for(i=0; i < create->num_zones; i++) {
808    
809            int next = (i+1<create->num_zones) ? create->zones[i+1].frame : rc->num_frames;
810    
811            if (i==0 && create->zones[i].frame > 0) {
812                for (j = 0; j < create->zones[i].frame && j < rc->num_frames; j++) {
813                    rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;
814                    rc->stats[j].weight = 1.0;
815                }
816                rc->avg_weight += create->zones[i].frame * 1.0;
817                n += create->zones[i].frame;
818            }
819    
820            if (create->zones[i].mode == XVID_ZONE_WEIGHT) {
821                for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) {
822                    rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;
823                    rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base;
824                }
825                next -= create->zones[i].frame;
826                rc->avg_weight += (double)(next * create->zones[i].increment) / (double)create->zones[i].base;
827                n += next;
828            }else{  // XVID_ZONE_QUANT
829                for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) {
830                    rc->stats[j].zone_mode = XVID_ZONE_QUANT;
831                    rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base;
832                    rc->tot_quant += rc->stats[j].length;
833                }
834            }
835        }
836        rc->avg_weight = n>0 ? rc->avg_weight/n : 1.0;
837    
838        DPRINTF(XVID_DEBUG_RC, "center_weight: %f (for %i frames);   fixed_bytes: %i\n", rc->avg_weight, n, rc->tot_quant);
839    }
840    
841    
842    /* scale the curve */
843    
844    static void
845    internal_scale(rc_2pass2_t *rc)
846    {
847            int64_t target  = rc->target - rc->tot_quant;
848            int64_t pass1_length = rc->tot_length[0] + rc->tot_length[1] + rc->tot_length[2] - rc->tot_quant;
849            double scaler;
850            int i;
851    
852    
853            /* Let's compute a linear scaler in order to perform curve scaling */
854            scaler = (double)target / (double)pass1_length;
855    
856            if (target <= 0 || pass1_length <= 0 || target >= pass1_length) {
857                    DPRINTF(XVID_DEBUG_RC, "WARNING: Undersize detected\n");
858            scaler = 1.0;
859            }
860    
861        DPRINTF(XVID_DEBUG_RC,
862                            "Before correction: target=%i, tot_length=%i, scaler=%f\n",
863                            (int)target, (int)pass1_length, scaler);
864    
865            /*
866             * Perform an initial scale pass.
867             * If a frame size is scaled underneath our hardcoded minimums, then we
868             * force the frame size to the minimum, and deduct the original & scaled
869             * frame length from the original and target total lengths
870             */
871    
872            for (i=0; i<rc->num_frames; i++) {
873                    stat_t * s = &rc->stats[i];
874                    int min_size[3];
875                    int len;
876    
877                    /* Compute min frame lengths (oe for each frame type) */
878                    min_size[0] = ((s->blks[0]*22) + 240) / 8;
879                    min_size[1] = (s->blks[0] + 88) / 8;
880                    min_size[2] = 8;
881    
882            if (s->zone_mode == XVID_ZONE_QUANT) {
883                s->scaled_length = s->length;
884                            continue;
885                    }
886    
887                    /* Compute teh scaled length */
888                    len = (int)((double)s->length * scaler * s->weight / rc->avg_weight);
889    
890                    /* Compare with the computed minimum */
891                    if (len < min_size[s->type-1]) {
892                            /* force frame size to our computed minimum */
893                            s->scaled_length = min_size[s->type-1];
894                            target -= s->scaled_length;
895                            pass1_length -= s->length;
896                    } else {
897                            /* Do nothing for now, we'll scale this later */
898                            s->scaled_length = 0;
899                    }
900    
901            }
902    
903            /* Correct the scaler for all non forced frames */
904            scaler = (double)target / (double)pass1_length;
905    
906            /* Detect undersizing */
907        if (target <= 0 || pass1_length <= 0 || target >= pass1_length) {
908                    DPRINTF(XVID_DEBUG_RC, "WARNING: Undersize detected\n");
909                    scaler = 1.0;
910            }
911    
912            DPRINTF(XVID_DEBUG_RC,
913                            "After correction: target=%i, tot_length=%i, scaler=%f\n",
914                            (int)target, (int)pass1_length, scaler);
915    
916            /* Do another pass with the new scaler */
917            for (i=0; i<rc->num_frames; i++) {
918                    stat_t * s = &rc->stats[i];
919    
920                    /* Ignore frame with forced frame sizes */
921                    if (s->scaled_length == 0)
922                            s->scaled_length = (int)((double)s->length * scaler * s->weight / rc->avg_weight);
923            }
924    
925    }
926    
927    static void
928    pre_process1(rc_2pass2_t * rc)
929    {
930        int i;
931        double total1, total2;
932        uint64_t ivop_boost_total;
933    
934        ivop_boost_total = 0;
935        rc->curve_comp_error = 0;
936    
937        for (i=0; i<3; i++) {
938            rc->tot_scaled_length[i] = 0;
939        }
940    
941        for (i=0; i<rc->num_frames; i++) {
942            stat_t * s = &rc->stats[i];
943    
944            rc->tot_scaled_length[s->type-1] += s->scaled_length;
945    
946            if (s->type == XVID_TYPE_IVOP) {
947                ivop_boost_total += s->scaled_length * rc->param.keyframe_boost / 100;
948            }
949        }
950    
951        rc->movie_curve = ((double)(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1] + ivop_boost_total) /
952                                            (rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1]));
953    
954        for(i=0; i<3; i++) {
955            if (rc->count[i] == 0 || rc->movie_curve == 0) {
956                rc->avg_length[i] = 1;
957            }else{
958                rc->avg_length[i] = rc->tot_scaled_length[i] / rc->count[i] / rc->movie_curve;
959            }
960        }
961    
962        /* --- */
963    
964        total1=total2=0;
965    
966        for (i=0; i<rc->num_frames; i++) {
967            stat_t * s = &rc->stats[i];
968    
969            if (s->type != XVID_TYPE_IVOP) {
970                double dbytes,dbytes2;
971    
972                dbytes = s->scaled_length / rc->movie_curve;
973                dbytes2 = 0; /* XXX: warning */
974                total1 += dbytes;
975                if (s->type == XVID_TYPE_BVOP)
976                    dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1];
977    
978                            if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) {
979                                    dbytes2=((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_high / 100.0);
980                            } else {
981                                    dbytes2 = ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0);
982                            }
983    
984                if (s->type == XVID_TYPE_BVOP) {
985                                dbytes2 *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];
986                                if (dbytes2 < rc->min_length[XVID_TYPE_BVOP-1])
987                                        dbytes2 = rc->min_length[XVID_TYPE_BVOP-1];
988                }else{
989                                if (dbytes2 < rc->min_length[XVID_TYPE_PVOP-1])
990                                        dbytes2 = rc->min_length[XVID_TYPE_PVOP-1];
991                }
992                total2 += dbytes2;
993            }
994        }
995    
996        rc->curve_comp_scale = total1 / total2;
997    
998            DPRINTF(XVID_DEBUG_RC, "middle frame size for asymmetric curve compression: %i\n",
999                (int)(rc->avg_length[XVID_TYPE_PVOP-1] * rc->curve_comp_scale));
1000    
1001        rc->overflow = 0;
1002        rc->KFoverflow = 0;
1003        rc->KFoverflow_partial = 0;
1004        rc->KF_idx = 1;
1005  }  }
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