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revision 942, Tue Mar 25 11:01:48 2003 UTC revision 1048, Thu May 29 11:37:20 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 1.1.2.15 2003-05-29 11:37:20 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    /* Keyframe settings */
52    #define DEFAULT_KFTRESHOLD 10
53    #define DEFAULT_KFREDUCTION 20
54    #define DEFAULT_MIN_KEY_INTERVAL 1
55    
56    /*****************************************************************************
57     * Structures
58     ****************************************************************************/
59    
60    /* Statistics */
61  typedef struct {  typedef struct {
62      int type;               /* first pass type */      int type;               /* first pass type */
63      int quant;              /* first pass quant */      int quant;              /* first pass quant */
64            int blks[3];                    /* k,m,y blks */
65      int length;             /* first pass length */      int length;             /* first pass length */
66      int scaled_length;     /* scaled length */      int scaled_length;     /* scaled length */
67      int desired_length;      int desired_length;     /* desired length; calcuated during encoding */
 } stat_t;  
   
   
68    
69        int zone_mode;   /* XVID_ZONE_xxx */
70        double weight;
71    } stat_t;
72    
73  /* context struct */  /* Context struct */
74  typedef struct  typedef struct
75  {  {
76      xvid_plugin_2pass2_t param;      xvid_plugin_2pass2_t param;
# Line 54  Line 78 
78      /* constant statistical data */      /* constant statistical data */
79      int num_frames;      int num_frames;
80      int num_keyframes;      int num_keyframes;
81            uint64_t target;        /* target filesize */
82    
83      int count[3];   /* count of each frame types */      int count[3];   /* count of each frame types */
84      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 87 
87      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 */
88      int max_length;     /* max frame size */      int max_length;     /* max frame size */
89    
90            /* zone statistical data */
91            double avg_weight;  /* average weight */
92            int64_t tot_quant;   /* total length used by XVID_ZONE_QUANT zones */
93    
94    
95      double curve_comp_scale;      double curve_comp_scale;
96      double movie_curve;      double movie_curve;
97    
         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;  
   
98      /* dynamic */      /* dynamic */
99    
100      int * keyframe_locations;      int * keyframe_locations;
101      stat_t * stats;      stat_t * stats;
102    
103      double pquant_error[32];          double quant_error[3][32];
     double bquant_error[32];  
104      int quant_count[32];      int quant_count[32];
105      int last_quant[3];      int last_quant[3];
106    
# Line 88  Line 109 
109      int KFoverflow;      int KFoverflow;
110      int KFoverflow_partial;      int KFoverflow_partial;
111      int KF_idx;      int KF_idx;
 } rc_2pass2_t;  
   
   
   
 #define BUF_SZ 1024  
 #define MAX_COLS    5  
   
   
 /* 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;  
112    
113      rc->num_frames = 0;          double fq_error;
114      rc->num_keyframes = 0;  } rc_2pass2_t;
   
     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);  
   
     return 1;  
 }  
115    
116    
117  /* open stats file(s) and read into rc->stats array */  /*****************************************************************************
118     * Sub plugin functions prototypes
119     ****************************************************************************/
120    
121    static int rc_2pass2_create(xvid_plg_create_t * create, rc_2pass2_t ** handle);
122    static int rc_2pass2_before(rc_2pass2_t * rc, xvid_plg_data_t * data);
123    static int rc_2pass2_after(rc_2pass2_t * rc, xvid_plg_data_t * data);
124    static int rc_2pass2_destroy(rc_2pass2_t * rc, xvid_plg_destroy_t * destroy);
125    
126    /*****************************************************************************
127     * Plugin definition
128     ****************************************************************************/
129    
130  static int load_stats(rc_2pass2_t *rc, char * filename1, char * filename2)  int
131    xvid_plugin_2pass2(void * handle, int opt, void * param1, void * param2)
132  {  {
133      FILE * f1, *f2;      switch(opt) {
134      int i;      case XVID_PLG_INFO :
   
   
     if ((f1 = fopen(filename1, "rt"))==NULL)  
         return 0;  
   
     if ((f2 = fopen(filename2, "rt"))==NULL) {  
         fclose(f1);  
135          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;  
136    
137          if (type == 'i') {      case XVID_PLG_CREATE :
138              s->type = XVID_TYPE_IVOP;          return rc_2pass2_create((xvid_plg_create_t*)param1, param2);
         }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);  
                                 }  
                         }  
139    
140                          if (s->type == XVID_TYPE_BVOP) {      case XVID_PLG_DESTROY :
141                                  dbytes2 *= avg_bvop / avg_pvop;          return rc_2pass2_destroy((rc_2pass2_t*)handle, (xvid_plg_destroy_t*)param1);
             }  
142    
143              if (dbytes2 < rc->min_length[s->type-1]) {      case XVID_PLG_BEFORE :
144                  dbytes = rc->min_length[s->type-1];          return rc_2pass2_before((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1);
             }  
145    
146              total2 += dbytes2;      case XVID_PLG_AFTER :
147                  }          return rc_2pass2_after((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1);
148          }          }
149    
150          rc->curve_comp_scale = total1 / total2;      return XVID_ERR_FAIL;
   
         if (!rc->param.use_alt_curve) {  
                 printf("middle frame size for asymmetric curve compression: %i",  
             (int)(avg_pvop * rc->curve_comp_scale));  
151          }          }
 }*/  
   
152    
153    /*****************************************************************************
154     * Sub plugin functions definitions
155     ****************************************************************************/
156    
157    /* First a few local helping function prototypes */
158    static  int det_stats_length(rc_2pass2_t * rc, char * filename);
159    static  int load_stats(rc_2pass2_t *rc, char * filename);
160    static void zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create);
161    static void internal_scale(rc_2pass2_t *rc);
162    static void pre_process0(rc_2pass2_t * rc);
163    static void pre_process1(rc_2pass2_t * rc);
164    
165    /*----------------------------------------------------------------------------
166     *--------------------------------------------------------------------------*/
167    
168  static void print_stats(rc_2pass2_t * rc)  static int
169    rc_2pass2_create(xvid_plg_create_t * create, rc_2pass2_t **handle)
170  {  {
171        xvid_plugin_2pass2_t * param = (xvid_plugin_2pass2_t *)create->param;
172        rc_2pass2_t * rc;
173      int i;      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);  
174    
175      }      rc = malloc(sizeof(rc_2pass2_t));
176  }      if (rc == NULL)
177            return XVID_ERR_MEMORY;
178    
179        rc->param = *param;
180    
181  /* pre-process the statistics data          /*
182      this is a clone of vfw/src/2pass.c:codec_2pass_init minus file reading, alt_curve, internal scale           * Initialize all defaults
183  */  */
184    #define _INIT(a, b) if((a) <= 0) (a) = (b)
185        /* Let's set our defaults if needed */
186            _INIT(rc->param.keyframe_boost, DEFAULT_KEYFRAME_BOOST);
187            _INIT(rc->param.payback_method, DEFAULT_PAYBACK_METHOD);
188            _INIT(rc->param.bitrate_payback_delay, DEFAULT_BITRATE_PAYBACK_DELAY);
189        _INIT(rc->param.curve_compression_high, DEFAULT_CURVE_COMPRESSION_HIGH);
190        _INIT(rc->param.curve_compression_low, DEFAULT_CURVE_COMPRESSION_LOW);
191        _INIT(rc->param.max_overflow_improvement, DEFAULT_MAX_OVERFLOW_IMPROVEMENT);
192        _INIT(rc->param.max_overflow_degradation,  DEFAULT_MAX_OVERFLOW_DEGRADATION);
193    
194        /* Keyframe settings */
195            _INIT(rc->param.kftreshold, DEFAULT_KFTRESHOLD);
196        _INIT(rc->param.kfreduction, DEFAULT_KFREDUCTION);
197        _INIT(rc->param.min_key_interval, DEFAULT_MIN_KEY_INTERVAL);
198    #undef _INIT
199    
200  void pre_process(rc_2pass2_t * rc)          /* Initialize some stuff to zero */
201  {          for(i=0; i<32; i++) rc->quant_count[i] = 0;
     int i,j;  
     double total1, total2;  
     uint64_t ivop_boost_total;  
   
     ivop_boost_total = 0;  
     rc->curve_comp_error = 0;  
202    
203      for (i=0; i<3; i++) {      for (i=0; i<3; i++) {
204          rc->count[i]=0;                  int j;
205          rc->tot_length[i] = 0;                  for (j=0; j<32; j++)
206          rc->tot_scaled_length[i] = 0;                          rc->quant_error[i][j] = 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;  
207          }          }
208    
209          if (i == 0 || s->length > rc->max_length) {          for (i=0; i<3; i++)
210              rc->max_length = s->length;                  rc->last_quant[i] = 0;
         }  
   
         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);  
                 }  
             }  
   
             if (s->type == XVID_TYPE_BVOP) {  
                             dbytes2 *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];  
                             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))));  
                                         }  
                                 }  
                         }  
   
                         if (rc->movie_curve > 1.0)  
                                 dbytes *= rc->movie_curve;  
   
                         newquant = (int)(dbytes * 2.0 / (curve_temp * rc->curve_comp_scale + rc->alt_curve_curve_bias_bonus));  
                         if (newquant > 1) {  
                                 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);  
                                 }  
                         }  
                 }  
   
     }  
   
     rc->overflow = 0;  
     rc->KFoverflow = 0;  
     rc->KFoverflow_partial = 0;  
     rc->KF_idx = 1;  
 }  
   
   
   
   
 static int rc_2pass2_create(xvid_plg_create_t * create, rc_2pass2_t ** handle)  
 {  
     xvid_plugin_2pass2_t * param = (xvid_plugin_2pass2_t *)create->param;  
     rc_2pass2_t * rc;  
   
     rc = malloc(sizeof(rc_2pass2_t));  
     if (rc == NULL)  
         return XVID_ERR_MEMORY;  
   
     rc->param = *param;  
211    
212      if (rc->param.keyframe_boost <= 0) rc->param.keyframe_boost = 0;          rc->fq_error = 0;
     if (rc->param.payback_method <= 0) rc->param.payback_method = XVID_PAYBACK_PROP;  
     if (rc->param.bitrate_payback_delay <= 0) rc->param.bitrate_payback_delay = 250;  
     if (rc->param.curve_compression_high <= 0) rc->param.curve_compression_high = 0;  
     if (rc->param.curve_compression_low <= 0) rc->param.curve_compression_low = 0;  
     if (rc->param.max_overflow_improvement <= 0) rc->param.max_overflow_improvement = 60;  
     if (rc->param.max_overflow_degradation <= 0) rc->param.max_overflow_degradation = 60;  
     if (rc->param.min_quant[0] <= 0) rc->param.min_quant[0] = 2;  
     if (rc->param.max_quant[0] <= 0) rc->param.max_quant[0] = 31;  
     if (rc->param.min_quant[1] <= 0) rc->param.min_quant[1] = 2;  
     if (rc->param.max_quant[1] <= 0) rc->param.max_quant[1] = 31;  
     if (rc->param.min_quant[2] <= 0) rc->param.min_quant[2] = 2;  
     if (rc->param.max_quant[2] <= 0) rc->param.max_quant[2] = 31;  
   
     if (rc->param.use_alt_curve <= 0) rc->param.use_alt_curve = 0;  
     if (rc->param.alt_curve_high_dist <= 0) rc->param.alt_curve_high_dist = 500;  
     if (rc->param.alt_curve_low_dist <= 0) rc->param.alt_curve_low_dist = 90;  
     if (rc->param.alt_curve_use_auto <= 0) rc->param.alt_curve_use_auto = 1;  
     if (rc->param.alt_curve_auto_str <= 0) rc->param.alt_curve_auto_str = 30;  
     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;  
213    
214      if (!det_stats_length(rc, param->filename1)){          /* Count frames in the stats file */
215          DPRINTF(DPRINTF_RC,"fopen %s failed\n", param->filename1);          if (!det_stats_length(rc, param->filename)) {
216                    DPRINTF(XVID_DEBUG_RC,"ERROR: fopen %s failed\n", param->filename);
217          free(rc);          free(rc);
218          return XVID_ERR_FAIL;          return XVID_ERR_FAIL;
219      }      }
220    
221        /* Allocate the stats' memory */
222      if ((rc->stats = malloc(rc->num_frames * sizeof(stat_t))) == NULL) {      if ((rc->stats = malloc(rc->num_frames * sizeof(stat_t))) == NULL) {
223          free(rc);          free(rc);
224          return XVID_ERR_MEMORY;          return XVID_ERR_MEMORY;
225      }      }
226    
227      /* XXX: do we need an addition location */      /*
228      if ((rc->keyframe_locations = malloc((rc->num_keyframes + 1) * sizeof(int))) == NULL) {           * Allocate keyframes location's memory
229             * PS: see comment in pre_process0 for the +1 location requirement
230             */
231            rc->keyframe_locations = malloc((rc->num_keyframes + 1) * sizeof(int));
232            if (rc->keyframe_locations == NULL) {
233          free(rc->stats);          free(rc->stats);
234          free(rc);          free(rc);
235          return XVID_ERR_MEMORY;          return XVID_ERR_MEMORY;
236      }      }
237    
238      if (!load_stats(rc, param->filename1, param->filename2)) {          if (!load_stats(rc, param->filename)) {
239          DPRINTF(DPRINTF_RC,"fopen %s,%s failed\n", param->filename1, param->filename2);                  DPRINTF(XVID_DEBUG_RC,"ERROR: fopen %s failed\n", param->filename);
240          free(rc->keyframe_locations);          free(rc->keyframe_locations);
241          free(rc->stats);          free(rc->stats);
242          free(rc);          free(rc);
243          return XVID_ERR_FAIL;          return XVID_ERR_FAIL;
244      }      }
245    
246      /* pre-process our stats */          /* Compute the target filesize */
247      pre_process(rc);          if (rc->num_frames  < create->fbase/create->fincr) {
248                    /* Source sequence is less than 1s long, we do as if it was 1s long */
249                    rc->target = rc->param.bitrate / 8;
250            } else {
251                    /* Target filesize = bitrate/8 * numframes / framerate */
252                    rc->target =
253                            ((uint64_t)rc->param.bitrate * (uint64_t)rc->num_frames * \
254                             (uint64_t)create->fincr) / \
255                            ((uint64_t)create->fbase * 8);
256            }
257    
258            DPRINTF(XVID_DEBUG_RC, "Frame rate: %d/%d (%ffps)\n",
259                            create->fbase, create->fincr,
260                            (double)create->fbase/(double)create->fincr);
261            DPRINTF(XVID_DEBUG_RC, "Number of frames: %d\n", rc->num_frames);
262            DPRINTF(XVID_DEBUG_RC, "Target bitrate: %ld\n", rc->param.bitrate);
263            DPRINTF(XVID_DEBUG_RC, "Target filesize: %lld\n", rc->target);
264    
265            /* Compensate the average frame overhead caused by the container */
266            rc->target -= rc->num_frames*rc->param.container_frame_overhead;
267            DPRINTF(XVID_DEBUG_RC, "Container Frame overhead: %d\n", rc->param.container_frame_overhead);
268            DPRINTF(XVID_DEBUG_RC, "Target filesize (after container compensation): %lld\n", rc->target);
269    
270            /*
271             * First data pre processing:
272             *  - finds the minimum frame length for each frame type during 1st pass.
273             *     rc->min_size[]
274             *  - determines the maximum frame length observed (no frame type distinction).
275             *     rc->max_size
276             *  - count how many times each frame type has been used.
277             *     rc->count[]
278             *  - total bytes used per frame type
279             *     rc->total[]
280             *  - store keyframe location
281             *     rc->keyframe_locations[]
282             */
283            pre_process0(rc);
284    
285            /*
286             * When bitrate is not given it means it has been scaled by an external
287             * application
288             */
289            if (rc->param.bitrate) {
290                    /* Apply zone settings */
291                    zone_process(rc, create);
292                    /* Perform curve scaling */
293                    internal_scale(rc);
294            } else {
295                    /* External scaling -- zones are ignored */
296                    for (i=0;i<rc->num_frames;i++) {
297                            rc->stats[i].zone_mode = XVID_ZONE_WEIGHT;
298                            rc->stats[i].weight = 1.0;
299                    }
300                    rc->avg_weight = 1.0;
301                    rc->tot_quant = 0;
302            }
303    
304            pre_process1(rc);
305    
306      *handle = rc;      *handle = rc;
307          return(0);          return(0);
308  }  }
309    
310    /*----------------------------------------------------------------------------
311     *--------------------------------------------------------------------------*/
312    
313  static int rc_2pass2_destroy(rc_2pass2_t * rc, xvid_plg_destroy_t * destroy)  static int
314    rc_2pass2_destroy(rc_2pass2_t * rc, xvid_plg_destroy_t * destroy)
315  {  {
316      free(rc->keyframe_locations);      free(rc->keyframe_locations);
317      free(rc->stats);      free(rc->stats);
# Line 675  Line 319 
319          return(0);          return(0);
320  }  }
321    
322    /*----------------------------------------------------------------------------
323     *--------------------------------------------------------------------------*/
324    
325    static int
326  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)
327  {  {
328      stat_t * s = &rc->stats[data->frame_num];      stat_t * s = &rc->stats[data->frame_num];
329      int overflow;      int overflow;
330      int desired;      int desired;
331      double dbytes;      double dbytes;
332      double curve_temp;      double curve_temp;
333            double scaled_quant;
334      int capped_to_max_framesize = 0;      int capped_to_max_framesize = 0;
335    
336      if (data->frame_num >= rc->num_frames) {          /*
337          /* insufficent stats data */           * This function is quite long but easy to understand. In order to simplify
338          return 0;           * the code path (a bit), we treat 3 cases that can return immediatly.
339             */
340    
341            /* First case: Another plugin has already set a quantizer */
342        if (data->quant > 0)
343                    return(0);
344    
345            /* Second case: We are in a Quant zone */
346            if (s->zone_mode == XVID_ZONE_QUANT) {
347                    rc->fq_error += s->weight;
348                    data->quant = (int)rc->fq_error;
349                    rc->fq_error -= data->quant;
350    
351                    s->desired_length = s->length;
352    
353                    return(0);
354      }      }
355    
356      overflow = rc->overflow / 8;        /* XXX: why by 8 */          /* Third case: insufficent stats data */
357            if (data->frame_num >= rc->num_frames)
358                    return 0;
359    
360            /*
361             * The last case is the one every normal minded developer should fear to
362             * maintain in a project :-)
363             */
364    
365            /* XXX: why by 8 */
366            overflow = rc->overflow / 8;
367    
368      if (s->type == XVID_TYPE_IVOP) {        /* XXX: why */          /*
369             * The rc->overflow field represents the overflow in current scene (between two
370             * IFrames) so we must not forget to reset it if we are entering a new scene
371             */
372            if (s->type == XVID_TYPE_IVOP)
373          overflow = 0;          overflow = 0;
     }  
374    
375      desired = s->scaled_length;      desired = s->scaled_length;
376    
377      dbytes = desired;      dbytes = desired;
378      if (s->type == XVID_TYPE_IVOP) {          if (s->type == XVID_TYPE_IVOP)
379          dbytes += desired * rc->param.keyframe_boost / 100;          dbytes += desired * rc->param.keyframe_boost / 100;
     }  
380      dbytes /= rc->movie_curve;      dbytes /= rc->movie_curve;
381    
382      if (s->type == XVID_TYPE_BVOP) {          /*
383             * We are now entering in the hard part of the algo, it was first designed
384             * to work with i/pframes only streams, so the way it computes things is
385             * adapted to pframes only. However we can use it if we just take care to
386             * scale the bframes sizes to pframes sizes using the ratio avg_p/avg_p and
387             * then before really using values depending on frame sizes, scaling the
388             * value again with the inverse ratio
389             */
390            if (s->type == XVID_TYPE_BVOP)
391          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];
     }  
392    
393            /*
394             * Apply user's choosen Payback method. Payback helps bitrate to follow the
395             * scaled curve "paying back" past errors in curve previsions.
396             */
397      if (rc->param.payback_method == XVID_PAYBACK_BIAS) {      if (rc->param.payback_method == XVID_PAYBACK_BIAS) {
398          desired =(int)(rc->curve_comp_error / rc->param.bitrate_payback_delay);          desired =(int)(rc->curve_comp_error / rc->param.bitrate_payback_delay);
399      }else{      }else{
# Line 722  Line 407 
407    
408      rc->curve_comp_error -= desired;      rc->curve_comp_error -= desired;
409    
410      /* alt curve */          /* XXX: warning */
411            curve_temp = 0;
412    
413      curve_temp = 0; /* XXX: warning */          if ((rc->param.curve_compression_high + rc->param.curve_compression_low) &&     s->type != XVID_TYPE_IVOP) {
   
     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];  
   
                         curve_temp = curve_temp * rc->curve_comp_scale + rc->alt_curve_curve_bias_bonus;  
   
                         desired += ((int)curve_temp);  
                         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) {  
414    
415          curve_temp = rc->curve_comp_scale;          curve_temp = rc->curve_comp_scale;
416          if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) {          if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) {
# Line 783  Line 419 
419              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);
420          }          }
421    
422          if (s->type == XVID_TYPE_BVOP){                  /*
423                     * End of code path for curve_temp, as told earlier, we are now
424                     * obliged to scale the value to a bframe one using the inverse
425                     * ratio applied earlier
426                     */
427                    if (s->type == XVID_TYPE_BVOP)
428              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];
         }  
429    
430          desired += (int)curve_temp;          desired += (int)curve_temp;
431          rc->curve_comp_error += curve_temp - (int)curve_temp;          rc->curve_comp_error += curve_temp - (int)curve_temp;
432      }else{      }else{
433          if (s->type == XVID_TYPE_BVOP){                  /*
434                     * End of code path for dbytes, as told earlier, we are now
435                     * obliged to scale the value to a bframe one using the inverse
436                     * ratio applied earlier
437                     */
438                    if (s->type == XVID_TYPE_BVOP)
439                          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];
         }  
440    
441                  desired += (int)dbytes;                  desired += (int)dbytes;
442                  rc->curve_comp_error += dbytes - (int)dbytes;                  rc->curve_comp_error += dbytes - (int)dbytes;
443      }      }
444    
445    
446            /*
447             * We can't do bigger frames than first pass, this would be stupid as first
448             * pass is quant=2 and that reaching quant=1 is not worth it. We would lose
449             * many bytes and we would not not gain much quality.
450             */
451          if (desired > s->length){          if (desired > s->length){
452                  rc->curve_comp_error += desired - s->length;                  rc->curve_comp_error += desired - s->length;
453                  desired = s->length;                  desired = s->length;
# Line 813  Line 463 
463      s->desired_length = desired;      s->desired_length = desired;
464    
465    
466      /* if this keyframe is too close to the next, reduce it's byte allotment          /*
467      XXX: why do we do this after setting the desired length  */           * if this keyframe is too close to the next, reduce it's byte allotment
468             * XXX: why do we do this after setting the desired length ?
469             */
470    
471          if (s->type == XVID_TYPE_IVOP) {          if (s->type == XVID_TYPE_IVOP) {
472                  int KFdistance = rc->keyframe_locations[rc->KF_idx] - rc->keyframe_locations[rc->KF_idx - 1];                  int KFdistance = rc->keyframe_locations[rc->KF_idx] - rc->keyframe_locations[rc->KF_idx - 1];
473    
474          if (KFdistance < rc->param.kftreshold) {          if (KFdistance < rc->param.kftreshold) {
475    
476              KFdistance = KFdistance - rc->param.min_key_interval;                          KFdistance -= rc->param.min_key_interval;
477    
478                          if (KFdistance >= 0) {                          if (KFdistance >= 0) {
479                  int KF_min_size;                  int KF_min_size;
# Line 841  Line 493 
493    
494      overflow = (int)((double)overflow * desired / rc->avg_length[XVID_TYPE_PVOP-1]);      overflow = (int)((double)overflow * desired / rc->avg_length[XVID_TYPE_PVOP-1]);
495    
496          // Foxer: reign in overflow with huge frames          /* Reign in overflow with huge frames */
497          if (labs(overflow) > labs(rc->overflow)) {          if (labs(overflow) > labs(rc->overflow))
498                  overflow = rc->overflow;                  overflow = rc->overflow;
         }  
   
     // Foxer: make sure overflow doesn't run away  
499    
500            /* Make sure overflow doesn't run away */
501          if (overflow > desired * rc->param.max_overflow_improvement / 100) {          if (overflow > desired * rc->param.max_overflow_improvement / 100) {
502                  desired += (overflow <= desired) ? desired * rc->param.max_overflow_improvement / 100 :                  desired += (overflow <= desired) ? desired * rc->param.max_overflow_improvement / 100 :
503                          overflow * rc->param.max_overflow_improvement / 100;                          overflow * rc->param.max_overflow_improvement / 100;
# Line 857  Line 507 
507                  desired += overflow;                  desired += overflow;
508          }          }
509    
510            /* Make sure we are not higher than desired frame size */
511      if (desired > rc->max_length) {      if (desired > rc->max_length) {
512                  capped_to_max_framesize = 1;                  capped_to_max_framesize = 1;
513                  desired = rc->max_length;                  desired = rc->max_length;
514                    DPRINTF(XVID_DEBUG_RC,"[%i] Capped to maximum frame size\n",
515                                    data->frame_num);
516          }          }
517    
518      // make sure to not scale below the minimum framesize          /* Make sure to not scale below the minimum framesize */
519      if (desired < rc->min_length[s->type-1]) {      if (desired < rc->min_length[s->type-1]) {
520          desired = rc->min_length[s->type-1];          desired = rc->min_length[s->type-1];
521                    DPRINTF(XVID_DEBUG_RC,"[%i] Capped to minimum frame size\n",
522                                    data->frame_num);
523      }      }
524    
525            /*
526             * Don't laugh at this very 'simple' quant<->filesize relationship, it
527             * proves to be acurate enough for our algorithm
528             */
529            scaled_quant = (double)s->quant*(double)s->length/(double)desired;
530    
531      // very 'simple' quant<->filesize relationship          /*
532      data->quant= (s->quant * s->length) / desired;           * Quantizer has been scaled using floating point operations/results, we
533             * must cast it to integer
534             */
535            data->quant = (int)scaled_quant;
536    
537            /* Let's clip the computed quantizer, if needed */
538          if (data->quant < 1) {          if (data->quant < 1) {
539                  data->quant = 1;                  data->quant = 1;
540      } else if (data->quant > 31) {      } else if (data->quant > 31) {
541                  data->quant = 31;                  data->quant = 31;
542          }          } else if (s->type != XVID_TYPE_IVOP) {
543          else if (s->type != XVID_TYPE_IVOP)  
544          {                  /*
545                  // Foxer: aid desired quantizer precision by accumulating decision error                   * The frame quantizer has not been clipped, this appears to be a good
546                  if (s->type== XVID_TYPE_BVOP) {                   * computed quantizer, do not loose quantizer decimal part that we
547                          rc->bquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant;                   * accumulate for later reuse when its sum represents a complete unit.
548                     */
549                    rc->quant_error[s->type-1][data->quant] += scaled_quant - (double)data->quant;
550    
551                          if (rc->bquant_error[data->quant] >= 1.0) {                  if (rc->quant_error[s->type-1][data->quant] >= 1.0) {
552                                  rc->bquant_error[data->quant] -= 1.0;                          rc->quant_error[s->type-1][data->quant] -= 1.0;
553                                  data->quant++;                                  data->quant++;
554                    } else if (rc->quant_error[s->type-1][data->quant] <= -1.0) {
555                            rc->quant_error[s->type-1][data->quant] += 1.0;
556                            data->quant--;
557                          }                          }
                 }else{  
                         rc->pquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant;  
558    
             if (rc->pquant_error[data->quant] >= 1.0) {  
                                 rc->pquant_error[data->quant] -= 1.0;  
                                 ++data->quant;  
                         }  
                 }  
559          }          }
560    
561      /* cap to min/max quant */          /*
562             * Now we have a computed quant that is in the right quante range, with a
563      if (data->quant < rc->param.min_quant[s->type-1]) {           * possible +1 correction due to cumulated error. We can now safely clip
564          data->quant = rc->param.min_quant[s->type-1];           * the quantizer again with user's quant ranges. "Safely" means the Rate
565      }else if (data->quant > rc->param.max_quant[s->type-1]) {           * Control could learn more about this quantizer, this knowledge is useful
566          data->quant = rc->param.max_quant[s->type-1];           * for future frames even if it this quantizer won't be really used atm,
567             * that's why we don't perform this clipping earlier.
568             */
569            if (data->quant < data->min_quant[s->type-1]) {
570                    data->quant = data->min_quant[s->type-1];
571            } else if (data->quant > data->max_quant[s->type-1]) {
572                    data->quant = data->max_quant[s->type-1];
573      }      }
574    
575      /* subsequent p/b frame quants can only be +- 2 */          /*
576             * To avoid big quality jumps from frame to frame, we apply a "security"
577             * rule that makes |last_quant - new_quant| <= 2. This rule only applies
578             * to predicted frames (P and B)
579             */
580          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) {
581    
582                  if (data->quant > rc->last_quant[s->type-1] + 2) {                  if (data->quant > rc->last_quant[s->type-1] + 2) {
583                          data->quant = rc->last_quant[s->type-1] + 2;                          data->quant = rc->last_quant[s->type-1] + 2;
584                          DPRINTF(DPRINTF_RC, "p/b-frame quantizer prevented from rising too steeply");                          DPRINTF(XVID_DEBUG_RC,
585                                            "[%i] p/b-frame quantizer prevented from rising too steeply\n",
586                                            data->frame_num);
587                  }                  }
588                  if (data->quant < rc->last_quant[s->type-1] - 2) {                  if (data->quant < rc->last_quant[s->type-1] - 2) {
589                          data->quant = rc->last_quant[s->type-1] - 2;                          data->quant = rc->last_quant[s->type-1] - 2;
590                          DPRINTF(DPRINTF_RC, "p/b-frame quantizer prevented from falling too steeply");                          DPRINTF(XVID_DEBUG_RC,
591                                            "[%i] p/b-frame quantizer prevented from falling too steeply\n",
592                                            data->frame_num);
593                  }                  }
594          }          }
595    
596          if (capped_to_max_framesize == 0) {          /*
597             * We don't want to pollute the RC history results when our computed quant
598             * has been computed from a capped frame size
599             */
600            if (capped_to_max_framesize == 0)
601          rc->last_quant[s->type-1] = data->quant;          rc->last_quant[s->type-1] = data->quant;
         }  
602    
603          return 0;          return 0;
604  }  }
605    
606    /*----------------------------------------------------------------------------
607     *--------------------------------------------------------------------------*/
608    
609    static int
610  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)
611  {  {
612            const char frame_type[4] = { 'i', 'p', 'b', 's'};
613      stat_t * s = &rc->stats[data->frame_num];      stat_t * s = &rc->stats[data->frame_num];
614    
615      if (data->frame_num >= rc->num_frames) {          /* Insufficent stats data */
616          /* insufficent stats data */      if (data->frame_num >= rc->num_frames)
617          return 0;          return 0;
     }  
618    
619      rc->quant_count[data->quant]++;      rc->quant_count[data->quant]++;
620    
# Line 957  Line 638 
638          rc->KFoverflow -= rc->KFoverflow_partial;          rc->KFoverflow -= rc->KFoverflow_partial;
639      }      }
640    
641      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 desired:%d overflow:%i\n",
642          data->frame_num,          data->frame_num,
643                            frame_type[data->type-1],
644          data->quant,          data->quant,
645          s->length,          s->length,
646          s->scaled_length,          s->scaled_length,
647          data->length,          data->length,
648                            s->desired_length,
649          rc->overflow);          rc->overflow);
650    
651      return(0);      return(0);
652  }  }
653    
654    /*****************************************************************************
655     * Helper functions definition
656     ****************************************************************************/
657    
658    #define BUF_SZ   1024
659    #define MAX_COLS 5
660    
661  int xvid_plugin_2pass2(void * handle, int opt, void * param1, void * param2)  /* open stats file, and count num frames */
662    static int
663    det_stats_length(rc_2pass2_t * rc, char * filename)
664  {  {
665      switch(opt)      FILE * f;
666        int n, ignore;
667        char type;
668    
669        rc->num_frames = 0;
670        rc->num_keyframes = 0;
671    
672        if ((f = fopen(filename, "rt")) == NULL)
673            return 0;
674    
675        while((n = fscanf(f, "%c %d %d %d %d %d %d\n",
676            &type, &ignore, &ignore, &ignore, &ignore, &ignore, &ignore)) != EOF) {
677            if (type == 'i') {
678                rc->num_frames++;
679                rc->num_keyframes++;
680            }else if (type == 'p' || type == 'b' || type == 's') {
681                rc->num_frames++;
682            }
683        }
684    
685        fclose(f);
686    
687        return 1;
688    }
689    
690    /* open stats file(s) and read into rc->stats array */
691    
692    static int
693    load_stats(rc_2pass2_t *rc, char * filename)
694      {      {
695      case XVID_PLG_INFO :      FILE * f;
696        int i, not_scaled;
697    
698    
699        if ((f = fopen(filename, "rt"))==NULL)
700          return 0;          return 0;
701    
702      case XVID_PLG_CREATE :      i = 0;
703          return rc_2pass2_create((xvid_plg_create_t*)param1, param2);          not_scaled = 0;
704        while(i < rc->num_frames) {
705            stat_t * s = &rc->stats[i];
706            int n;
707            char type;
708    
709      case XVID_PLG_DESTROY :                  s->scaled_length = 0;
710          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);
711            if (n == EOF) break;
712                    if (n < 7) {
713                            not_scaled = 1;
714                    }
715    
716      case XVID_PLG_BEFORE :          if (type == 'i') {
717          return rc_2pass2_before((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1);              s->type = XVID_TYPE_IVOP;
718            }else if (type == 'p' || type == 's') {
719                s->type = XVID_TYPE_PVOP;
720            }else if (type == 'b') {
721                s->type = XVID_TYPE_BVOP;
722            }else{  /* unknown type */
723                DPRINTF(XVID_DEBUG_RC, "unknown stats frame type; assuming pvop\n");
724                s->type = XVID_TYPE_PVOP;
725            }
726    
727      case XVID_PLG_AFTER :          i++;
         return rc_2pass2_after((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1);  
728      }      }
729    
730      return XVID_ERR_FAIL;      rc->num_frames = i;
731    
732            fclose(f);
733    
734        return 1;
735    }
736    
737    #if 0
738    static void print_stats(rc_2pass2_t * rc)
739    {
740        int i;
741        DPRINTF(XVID_DEBUG_RC, "type quant length scaled_length\n");
742            for (i = 0; i < rc->num_frames; i++) {
743            stat_t * s = &rc->stats[i];
744            DPRINTF(XVID_DEBUG_RC, "%d %d %d %d\n", s->type, s->quant, s->length, s->scaled_length);
745        }
746    }
747    #endif
748    
749    /* pre-process the statistics data
750        - for each type, count, tot_length, min_length, max_length
751        - set keyframes_locations
752    */
753    
754    static void
755    pre_process0(rc_2pass2_t * rc)
756    {
757        int i,j;
758    
759            /*
760             * *rc fields initialization
761             * NB: INT_MAX and INT_MIN are used in order to be immediately replaced
762             *     with real values of the 1pass
763             */
764             for (i=0; i<3; i++) {
765                    rc->count[i]=0;
766                    rc->tot_length[i] = 0;
767                    rc->min_length[i] = INT_MAX;
768        }
769    
770            rc->max_length = INT_MIN;
771    
772            /*
773             * Loop through all frames and find/compute all the stuff this function
774             * is supposed to do
775             */
776            for (i=j=0; i<rc->num_frames; i++) {
777                    stat_t * s = &rc->stats[i];
778    
779                    rc->count[s->type-1]++;
780                    rc->tot_length[s->type-1] += s->length;
781    
782                    if (s->length < rc->min_length[s->type-1]) {
783                            rc->min_length[s->type-1] = s->length;
784                    }
785    
786                    if (s->length > rc->max_length) {
787                            rc->max_length = s->length;
788                    }
789    
790                    if (s->type == XVID_TYPE_IVOP) {
791                            rc->keyframe_locations[j] = i;
792                            j++;
793                    }
794            }
795    
796            /*
797             * Nota Bene:
798             * The "per sequence" overflow system considers a natural sequence to be
799             * formed by all frames between two iframes, so if we want to make sure
800             * the system does not go nuts during last sequence, we force the last
801             * frame to appear in the keyframe locations array.
802             */
803        rc->keyframe_locations[j] = i;
804    
805            DPRINTF(XVID_DEBUG_RC, "Min 1st pass IFrame length: %d\n", rc->min_length[0]);
806            DPRINTF(XVID_DEBUG_RC, "Min 1st pass PFrame length: %d\n", rc->min_length[1]);
807            DPRINTF(XVID_DEBUG_RC, "Min 1st pass BFrame length: %d\n", rc->min_length[2]);
808    }
809    
810    /* calculate zone weight "center" */
811    
812    static void
813    zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create)
814    {
815        int i,j;
816        int n = 0;
817    
818        rc->avg_weight = 0.0;
819        rc->tot_quant = 0;
820    
821    
822        if (create->num_zones == 0) {
823            for (j = 0; j < rc->num_frames; j++) {
824                rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;
825                rc->stats[j].weight = 1.0;
826            }
827            rc->avg_weight += rc->num_frames * 1.0;
828            n += rc->num_frames;
829        }
830    
831    
832        for(i=0; i < create->num_zones; i++) {
833    
834            int next = (i+1<create->num_zones) ? create->zones[i+1].frame : rc->num_frames;
835    
836            if (i==0 && create->zones[i].frame > 0) {
837                for (j = 0; j < create->zones[i].frame && j < rc->num_frames; j++) {
838                    rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;
839                    rc->stats[j].weight = 1.0;
840                }
841                rc->avg_weight += create->zones[i].frame * 1.0;
842                n += create->zones[i].frame;
843            }
844    
845            if (create->zones[i].mode == XVID_ZONE_WEIGHT) {
846                for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) {
847                    rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;
848                    rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base;
849                }
850                next -= create->zones[i].frame;
851                rc->avg_weight += (double)(next * create->zones[i].increment) / (double)create->zones[i].base;
852                n += next;
853            }else{  // XVID_ZONE_QUANT
854                for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) {
855                    rc->stats[j].zone_mode = XVID_ZONE_QUANT;
856                    rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base;
857                    rc->tot_quant += rc->stats[j].length;
858                }
859            }
860        }
861        rc->avg_weight = n>0 ? rc->avg_weight/n : 1.0;
862    
863        DPRINTF(XVID_DEBUG_RC, "center_weight: %f (for %i frames);   fixed_bytes: %i\n", rc->avg_weight, n, rc->tot_quant);
864    }
865    
866    
867    /* scale the curve */
868    
869    static void
870    internal_scale(rc_2pass2_t *rc)
871    {
872            int64_t target  = rc->target - rc->tot_quant;
873            int64_t pass1_length = rc->tot_length[0] + rc->tot_length[1] + rc->tot_length[2] - rc->tot_quant;
874            double scaler;
875            int i, num_MBs;
876            int min_size[3];
877    
878            /* Let's compute a linear scaler in order to perform curve scaling */
879            scaler = (double)target / (double)pass1_length;
880    
881            if (target <= 0 || pass1_length <= 0 || target >= pass1_length) {
882                    DPRINTF(XVID_DEBUG_RC, "WARNING: Undersize detected\n");
883            scaler = 1.0;
884            }
885    
886        DPRINTF(XVID_DEBUG_RC,
887                            "Before correction: target=%i, tot_length=%i, scaler=%f\n",
888                            (int)target, (int)pass1_length, scaler);
889    
890            /*
891             * Compute min frame lengths (for each frame type) according to the number
892             * of MBs. We sum all blocks count from frame 0 (should be an IFrame, so
893             * blocks[0] should be enough) to know how many MBs there are.
894             */
895            num_MBs = rc->stats[0].blks[0] + rc->stats[0].blks[1] + rc->stats[0].blks[2];
896            min_size[0] = ((num_MBs*22) + 240) / 8;
897            min_size[1] = ((num_MBs)    + 88)  / 8;
898            min_size[2] = 8;
899    
900            /*
901             * Perform an initial scale pass.
902             * If a frame size is scaled underneath our hardcoded minimums, then we
903             * force the frame size to the minimum, and deduct the original & scaled
904             * frame length from the original and target total lengths
905             */
906            for (i=0; i<rc->num_frames; i++) {
907                    stat_t * s = &rc->stats[i];
908                    int len;
909    
910            if (s->zone_mode == XVID_ZONE_QUANT) {
911                s->scaled_length = s->length;
912                            continue;
913                    }
914    
915                    /* Compute the scaled length */
916                    len = (int)((double)s->length * scaler * s->weight / rc->avg_weight);
917    
918                    /* Compare with the computed minimum */
919                    if (len < min_size[s->type-1]) {
920                            /* force frame size to our computed minimum */
921                            s->scaled_length = min_size[s->type-1];
922                            target -= s->scaled_length;
923                            pass1_length -= s->length;
924                    } else {
925                            /* Do nothing for now, we'll scale this later */
926                            s->scaled_length = 0;
927                    }
928            }
929    
930            /* Correct the scaler for all non forced frames */
931            scaler = (double)target / (double)pass1_length;
932    
933            /* Detect undersizing */
934        if (target <= 0 || pass1_length <= 0 || target >= pass1_length) {
935                    DPRINTF(XVID_DEBUG_RC, "WARNING: Undersize detected\n");
936                    scaler = 1.0;
937            }
938    
939            DPRINTF(XVID_DEBUG_RC,
940                            "After correction: target=%i, tot_length=%i, scaler=%f\n",
941                            (int)target, (int)pass1_length, scaler);
942    
943            /* Do another pass with the new scaler */
944            for (i=0; i<rc->num_frames; i++) {
945                    stat_t * s = &rc->stats[i];
946    
947                    /* Ignore frame with forced frame sizes */
948                    if (s->scaled_length == 0)
949                            s->scaled_length = (int)((double)s->length * scaler * s->weight / rc->avg_weight);
950            }
951    }
952    
953    static void
954    pre_process1(rc_2pass2_t * rc)
955    {
956        int i;
957        double total1, total2;
958        uint64_t ivop_boost_total;
959    
960        ivop_boost_total = 0;
961        rc->curve_comp_error = 0;
962    
963        for (i=0; i<3; i++) {
964            rc->tot_scaled_length[i] = 0;
965        }
966    
967        for (i=0; i<rc->num_frames; i++) {
968            stat_t * s = &rc->stats[i];
969    
970            rc->tot_scaled_length[s->type-1] += s->scaled_length;
971    
972            if (s->type == XVID_TYPE_IVOP) {
973                ivop_boost_total += s->scaled_length * rc->param.keyframe_boost / 100;
974            }
975        }
976    
977        rc->movie_curve = ((double)(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1] + ivop_boost_total) /
978                                            (rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1]));
979    
980        for(i=0; i<3; i++) {
981            if (rc->count[i] == 0 || rc->movie_curve == 0) {
982                rc->avg_length[i] = 1;
983            }else{
984                rc->avg_length[i] = rc->tot_scaled_length[i] / rc->count[i] / rc->movie_curve;
985            }
986        }
987    
988        /* --- */
989    
990        total1=total2=0;
991    
992        for (i=0; i<rc->num_frames; i++) {
993            stat_t * s = &rc->stats[i];
994    
995            if (s->type != XVID_TYPE_IVOP) {
996                double dbytes,dbytes2;
997    
998                dbytes = s->scaled_length / rc->movie_curve;
999                dbytes2 = 0; /* XXX: warning */
1000                total1 += dbytes;
1001                if (s->type == XVID_TYPE_BVOP)
1002                    dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1];
1003    
1004                            if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) {
1005                                    dbytes2=((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_high / 100.0);
1006                            } else {
1007                                    dbytes2 = ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0);
1008                            }
1009    
1010                if (s->type == XVID_TYPE_BVOP) {
1011                                dbytes2 *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];
1012                                if (dbytes2 < rc->min_length[XVID_TYPE_BVOP-1])
1013                                        dbytes2 = rc->min_length[XVID_TYPE_BVOP-1];
1014                }else{
1015                                if (dbytes2 < rc->min_length[XVID_TYPE_PVOP-1])
1016                                        dbytes2 = rc->min_length[XVID_TYPE_PVOP-1];
1017                }
1018                total2 += dbytes2;
1019            }
1020        }
1021    
1022        rc->curve_comp_scale = total1 / total2;
1023    
1024            DPRINTF(XVID_DEBUG_RC, "middle frame size for asymmetric curve compression: %i\n",
1025                (int)(rc->avg_length[XVID_TYPE_PVOP-1] * rc->curve_comp_scale));
1026    
1027        rc->overflow = 0;
1028        rc->KFoverflow = 0;
1029        rc->KFoverflow_partial = 0;
1030        rc->KF_idx = 1;
1031  }  }
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