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revision 1037, Thu May 22 10:57:33 2003 UTC revision 1247, Mon Dec 8 12:38:04 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 Foxer <email?>   * Copyright (C)      2002 Foxer <email?>
7   *                    2002 Dirk Knop <dknop@gwdg.de>   *                    2002 Dirk Knop <dknop@gwdg.de>
# Line 25  Line 25 
25   * along with this program; if not, write to the Free Software   * along with this program; if not, write to the Free Software
26   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
27   *   *
28   * $Id: plugin_2pass2.c,v 1.1.2.7 2003-05-22 10:57:33 edgomez Exp $   * $Id: plugin_2pass2.c,v 1.1.2.30 2003-12-08 12:38:04 syskin Exp $
29   *   *
30   *****************************************************************************/   *****************************************************************************/
31    
32    #undef COMPENSATE_FORMULA
33    
34  #include <stdio.h>  #include <stdio.h>
35  #include <math.h>  #include <math.h>
36    #include <limits.h>
 #define RAD2DEG 57.295779513082320876798154814105  
 #define DEG2RAD 0.017453292519943295769236907684886  
37    
38  #include "../xvid.h"  #include "../xvid.h"
39  #include "../image/image.h"  #include "../image/image.h"
40    
41    /*****************************************************************************
42     * Some constants
43     ****************************************************************************/
44    
45    #define DEFAULT_KEYFRAME_BOOST 0
46    #define DEFAULT_OVERFLOW_CONTROL_STRENGTH 10
47    #define DEFAULT_CURVE_COMPRESSION_HIGH 0
48    #define DEFAULT_CURVE_COMPRESSION_LOW 0
49    #define DEFAULT_MAX_OVERFLOW_IMPROVEMENT 60
50    #define DEFAULT_MAX_OVERFLOW_DEGRADATION 60
51    
52    /* Keyframe settings */
53    #define DEFAULT_KFREDUCTION 20
54    #define DEFAULT_KFTHRESHOLD 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 quant2;             /* Second pass quant */
65          int blks[3];                    /* k,m,y blks */          int blks[3];                    /* k,m,y blks */
66      int length;             /* first pass length */      int length;             /* first pass length */
67      int scaled_length;      /* scaled length */      int scaled_length;      /* scaled length */
68      int desired_length;     /* desired length; calcuated during encoding */          int desired_length;     /* desired length; calculated during encoding */
69            int error;
70    
71      int zone_mode;   /* XVID_ZONE_xxx */      int zone_mode;   /* XVID_ZONE_xxx */
72      double weight;      double weight;
73  } stat_t;  } twopass_stat_t;
   
74    
75    /* Context struct */
   
 /* context struct */  
76  typedef struct  typedef struct
77  {  {
78      xvid_plugin_2pass2_t param;      xvid_plugin_2pass2_t param;
79    
80      /* constant statistical data */          /*----------------------------------
81             * constant statistical data
82             *--------------------------------*/
83    
84            /* Number of frames of the sequence */
85          int num_frames;          int num_frames;
86    
87            /* Number of Intra frames of the sequence */
88      int num_keyframes;      int num_keyframes;
     uint64_t target;    /* target filesize */  
89    
90      int count[3];   /* count of each frame types */          /* Target filesize to reach */
91      uint64_t tot_length[3];  /* total length of each frame types */          uint64_t target;
     double avg_length[3];   /* avg */  
     int min_length[3];  /* min frame length of each frame types */  
     uint64_t tot_scaled_length[3];  /* total scaled length of each frame type */  
     int max_length;     /* max frame size */  
   
     /* zone statistical data */  
     double avg_weight;  /* average weight */  
     int64_t tot_quant;   /* total length used by XVID_ZONE_QUANT zones */  
   
   
     double curve_comp_scale;  
     double movie_curve;  
   
         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;  
92    
93      /* dynamic */          /* Count of each frame types */
94            int count[3];
95    
96      int * keyframe_locations;          /* Total length of each frame types (1st pass) */
97      stat_t * stats;          uint64_t tot_length[3];
98    
99      double pquant_error[32];          /* Average length of each frame types (used first for 1st pass data and
100      double bquant_error[32];           * then for scaled averages */
101      int quant_count[32];          double avg_length[3];
102      int last_quant[3];  
103            /* Minimum frame length allowed for each frame type */
104            int min_length[3];
105    
106            /* Total bytes per frame type once the curve has been scaled
107             * NB: advanced parameters do not change this value. This field
108             *     represents the total scaled w/o any advanced settings */
109            uint64_t tot_scaled_length[3];
110    
111            /* Maximum observed frame size observed during the first pass, the RC
112             * will try tp force all frame sizes in the second pass to be under that
113             * limit */
114            int max_length;
115    
116            /*----------------------------------
117             * Zones statistical data
118             *
119             * ToDo: Fix zones, current
120             *       implementation is buggy
121             *--------------------------------*/
122    
123            /* Average weight of the zones */
124            double avg_weight;
125    
126            /* Total length used by XVID_ZONE_QUANT zones */
127            int64_t tot_quant;
128    
129            /*----------------------------------
130             * Advanced settings helper ratios
131             *--------------------------------*/
132    
133            /* This the ratio that has to be applied to all p/b frames in order
134             * to reserve/retrieve bits for/from keyframe boosting and consecutive
135             * keyframe penalty */
136            double pb_iboost_tax_ratio;
137    
138            /* This the ratio to apply to all b/p frames in order to respect the
139             * assymetric curve compression while respecting a target filesize
140             * NB: The assymetric delta gain has to be computed before this ratio
141             *     is applied, and then the delta is added to the scaled size */
142            double assymetric_tax_ratio;
143    
144            /*----------------------------------
145             * Data from the stats file kept
146             * into RAM for easy access
147             *--------------------------------*/
148    
149            /* Array of keyframe locations
150             * eg: rc->keyframe_locations[100] returns the frame number of the 100th
151             *     keyframe */
152            int *keyframe_locations;
153    
154      double curve_comp_error;          /* Index of the last keyframe used in the keyframe_location */
     int overflow;  
     int KFoverflow;  
     int KFoverflow_partial;  
155      int KF_idx;      int KF_idx;
156    
157      double fq_error;          /* Array of all 1st pass data file -- see the twopass_stat_t structure
158  } rc_2pass2_t;           * definition for more details */
159            twopass_stat_t * stats;
160    
161            /*----------------------------------
162             * Histerysis helpers
163             *--------------------------------*/
164    
165            /* This field holds the int2float conversion errors of each quant per
166             * frame type, this allow the RC to keep track of rouding error and thus
167             * increase or decrease the chosen quant according to this residue */
168            double quant_error[3][32];
169    
170            /* This fields stores the count of each quant usage per frame type
171             * No real role but for debugging */
172            int quant_count[3][32];
173    
174            /* Last valid quantizer used per frame type, it allows quantizer
175             * increament/decreament limitation in order to avoid big image quality
176             * "jumps" */
177            int last_quant[3];
178    
179            /*----------------------------------
180             * Overflow control
181             *--------------------------------*/
182    
183            /* Current overflow that has to be distributed to p/b frames */
184            double overflow;
185    
186            /* Total overflow for keyframes -- not distributed directly */
187            double KFoverflow;
188    
189            /* Amount of keyframe overflow to introduce to the global p/b frame
190             * overflow counter at each encoded frame */
191            double KFoverflow_partial;
192    
193            /* Unknown ???
194             * ToDo: description */
195            double fq_error;
196    
197  #define BUF_SZ 1024          /*----------------------------------
198  #define MAX_COLS    5           * Debug
199             *--------------------------------*/
200            double desired_total;
201            double real_total;
202    } rc_2pass2_t;
203    
204    
205  /* open stats file, and count num frames */  /*****************************************************************************
206     * Sub plugin functions prototypes
207     ****************************************************************************/
208    
209    static int rc_2pass2_create(xvid_plg_create_t * create, rc_2pass2_t ** handle);
210    static int rc_2pass2_before(rc_2pass2_t * rc, xvid_plg_data_t * data);
211    static int rc_2pass2_after(rc_2pass2_t * rc, xvid_plg_data_t * data);
212    static int rc_2pass2_destroy(rc_2pass2_t * rc, xvid_plg_destroy_t * destroy);
213    
214    /*****************************************************************************
215     * Plugin definition
216     ****************************************************************************/
217    
218  static int det_stats_length(rc_2pass2_t * rc, char * filename)  int
219    xvid_plugin_2pass2(void * handle, int opt, void * param1, void * param2)
220  {  {
221      FILE * f;          switch(opt) {
222      int n, ignore;          case XVID_PLG_INFO :
223      char type;          case XVID_PLG_FRAME :
   
     rc->num_frames = 0;  
     rc->num_keyframes = 0;  
   
     if ((f = fopen(filename, "rt")) == NULL)  
224          return 0;          return 0;
225    
226      while((n = fscanf(f, "%c %d %d %d %d %d %d\n",          case XVID_PLG_CREATE :
227          &type, &ignore, &ignore, &ignore, &ignore, &ignore, &ignore)) != EOF) {                  return rc_2pass2_create((xvid_plg_create_t*)param1, param2);
         if (type == 'i') {  
             rc->num_frames++;  
             rc->num_keyframes++;  
         }else if (type == 'p' || type == 'b' || type == 's') {  
             rc->num_frames++;  
         }  
     }  
228    
229      fclose(f);          case XVID_PLG_DESTROY :
230                    return rc_2pass2_destroy((rc_2pass2_t*)handle, (xvid_plg_destroy_t*)param1);
231    
232      return 1;          case XVID_PLG_BEFORE :
233                    return rc_2pass2_before((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1);
234    
235            case XVID_PLG_AFTER :
236                    return rc_2pass2_after((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1);
237  }  }
238    
239            return XVID_ERR_FAIL;
240    }
241    
242    /*****************************************************************************
243     * Sub plugin functions definitions
244     ****************************************************************************/
245    
246    /* First a few local helping function prototypes */
247    static  int statsfile_count_frames(rc_2pass2_t * rc, char * filename);
248    static  int statsfile_load(rc_2pass2_t *rc, char * filename);
249    static void zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create);
250    static void first_pass_stats_prepare_data(rc_2pass2_t * rc);
251    static void first_pass_scale_curve_internal(rc_2pass2_t *rc);
252    static void scaled_curve_apply_advanced_parameters(rc_2pass2_t * rc);
253    #if 0
254    static void stats_print(rc_2pass2_t * rc);
255    #endif
256    
257  /* open stats file(s) and read into rc->stats array */  /*----------------------------------------------------------------------------
258     *--------------------------------------------------------------------------*/
259    
260  static int load_stats(rc_2pass2_t *rc, char * filename)  static int
261    rc_2pass2_create(xvid_plg_create_t * create, rc_2pass2_t **handle)
262  {  {
263      FILE * f;          xvid_plugin_2pass2_t * param = (xvid_plugin_2pass2_t *)create->param;
264      int i, not_scaled;          rc_2pass2_t * rc;
265            int i;
266    
267            rc = malloc(sizeof(rc_2pass2_t));
268            if (rc == NULL)
269                    return XVID_ERR_MEMORY;
270    
271      if ((f = fopen(filename, "rt"))==NULL)          rc->param = *param;
         return 0;  
272    
273      i = 0;          /* Initialize all defaults */
274          not_scaled = 0;  #define _INIT(a, b) if((a) <= 0) (a) = (b)
275      while(i < rc->num_frames) {          /* Let's set our defaults if needed */
276          stat_t * s = &rc->stats[i];          _INIT(rc->param.keyframe_boost, DEFAULT_KEYFRAME_BOOST);
277          int n;          _INIT(rc->param.overflow_control_strength, DEFAULT_OVERFLOW_CONTROL_STRENGTH);
278          char type;          _INIT(rc->param.curve_compression_high, DEFAULT_CURVE_COMPRESSION_HIGH);
279            _INIT(rc->param.curve_compression_low, DEFAULT_CURVE_COMPRESSION_LOW);
280            _INIT(rc->param.max_overflow_improvement, DEFAULT_MAX_OVERFLOW_IMPROVEMENT);
281            _INIT(rc->param.max_overflow_degradation,  DEFAULT_MAX_OVERFLOW_DEGRADATION);
282    
283            /* Keyframe settings */
284            _INIT(rc->param.kfreduction, DEFAULT_KFREDUCTION);
285            _INIT(rc->param.kfthreshold, DEFAULT_KFTHRESHOLD);
286    #undef _INIT
287    
288                  s->scaled_length = 0;          /* Initialize some stuff to zero */
289          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);          for(i=0; i<3; i++) {
290          if (n == EOF) break;                  int j;
291                  if (n < 7) {                  for (j=0; j<32; j++) {
292                          not_scaled = 1;                          rc->quant_error[i][j] = 0;
293                            rc->quant_count[i][j] = 0;
294                  }                  }
   
         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 */  
             DPRINTF(XVID_DEBUG_RC, "unknown stats frame type; assuming pvop");  
             s->type = XVID_TYPE_PVOP;  
295          }          }
296    
297          i++;          for (i=0; i<3; i++) rc->last_quant[i] = 0;
     }  
298    
299      rc->num_frames = i;          rc->fq_error = 0;
300    
301          fclose(f);          /* Count frames (and intra frames) in the stats file, store the result into
302             * the rc structure */
303            if (statsfile_count_frames(rc, param->filename) == -1) {
304                    DPRINTF(XVID_DEBUG_RC,"[xvid rc] -- ERROR: fopen %s failed\n", param->filename);
305                    free(rc);
306                    return(XVID_ERR_FAIL);
307            }
308    
309      return 1;          /* Allocate the stats' memory */
310            if ((rc->stats = malloc(rc->num_frames * sizeof(twopass_stat_t))) == NULL) {
311                    free(rc);
312                    return(XVID_ERR_MEMORY);
313  }  }
314    
315            /* Allocate keyframes location's memory
316             * PS: see comment in pre_process0 for the +1 location requirement */
317            rc->keyframe_locations = malloc((rc->num_keyframes + 1) * sizeof(int));
318            if (rc->keyframe_locations == NULL) {
319                    free(rc->stats);
320                    free(rc);
321                    return(XVID_ERR_MEMORY);
322            }
323    
324            /* Load the first pass stats */
325            if (statsfile_load(rc, param->filename) == -1) {
326                    DPRINTF(XVID_DEBUG_RC,"[xvid rc] -- ERROR: fopen %s failed\n", param->filename);
327                    free(rc->keyframe_locations);
328                    free(rc->stats);
329                    free(rc);
330                    return XVID_ERR_FAIL;
331            }
332    
333  #if 0          /* Compute the target filesize */
334  static void print_stats(rc_2pass2_t * rc)          if (rc->param.bitrate<0) {
335  {                  /* if negative, bitrate equals the target (in kbytes) */
336      int i;                  rc->target = ((uint64_t)(-rc->param.bitrate)) * 1024;
337            } else if (rc->num_frames  < create->fbase/create->fincr) {
338                    /* Source sequence is less than 1s long, we do as if it was 1s long */
339                    rc->target = rc->param.bitrate / 8;
340            } else {
341                    /* Target filesize = bitrate/8 * numframes / framerate */
342                    rc->target =
343                            ((uint64_t)rc->param.bitrate * (uint64_t)rc->num_frames * \
344                             (uint64_t)create->fincr) / \
345                            ((uint64_t)create->fbase * 8);
346            }
347    
348            DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Frame rate: %d/%d (%ffps)\n",
349                            create->fbase, create->fincr,
350                            (double)create->fbase/(double)create->fincr);
351            DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Number of frames: %d\n", rc->num_frames);
352            if(rc->param.bitrate>=0)
353                    DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Target bitrate: %ld\n", rc->param.bitrate);
354            DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Target filesize: %lld\n", rc->target);
355    
356            /* Compensate the average frame overhead caused by the container */
357            rc->target -= rc->num_frames*rc->param.container_frame_overhead;
358            DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Container Frame overhead: %d\n", rc->param.container_frame_overhead);
359            if(rc->param.container_frame_overhead)
360                    DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- New target filesize after container compensation: %lld\n", rc->target);
361    
362            /* Gathers some information about first pass stats:
363             *  - finds the minimum frame length for each frame type during 1st pass.
364             *     rc->min_size[]
365             *  - determines the maximum frame length observed (no frame type distinction).
366             *     rc->max_size
367             *  - count how many times each frame type has been used.
368             *     rc->count[]
369             *  - total bytes used per frame type
370             *     rc->total[]
371             *  - store keyframe location
372             *     rc->keyframe_locations[]
373             */
374            first_pass_stats_prepare_data(rc);
375    
376            /* When bitrate is not given it means it has been scaled by an external
377             * application */
378            if (rc->param.bitrate) {
379                    /* Apply zone settings */
380                    zone_process(rc, create);
381                    /* Perform internal curve scaling */
382                    first_pass_scale_curve_internal(rc);
383            } else {
384                    /* External scaling -- zones are ignored */
385      for (i = 0; i < rc->num_frames; i++) {      for (i = 0; i < rc->num_frames; i++) {
386          stat_t * s = &rc->stats[i];                          rc->stats[i].zone_mode = XVID_ZONE_WEIGHT;
387          DPRINTF(XVID_DEBUG_RC, "%i %i %i %i\n", s->type, s->quant, s->length, s->scaled_length);                          rc->stats[i].weight = 1.0;
388      }      }
389                    rc->avg_weight = 1.0;
390                    rc->tot_quant = 0;
391  }  }
 #endif  
392    
393  /* pre-process the statistics data          /* Apply advanced curve options, and compute some parameters in order to
394      - for each type, count, tot_length, min_length, max_length           * shape the curve in the BEFORE/AFTER pair of functions */
395      - set keyframes_locations          scaled_curve_apply_advanced_parameters(rc);
396  */  
397            *handle = rc;
398            return(0);
399    }
400    
401  void pre_process0(rc_2pass2_t * rc)  /*----------------------------------------------------------------------------
402     *--------------------------------------------------------------------------*/
403    
404    static int
405    rc_2pass2_destroy(rc_2pass2_t * rc, xvid_plg_destroy_t * destroy)
406  {  {
407      int i,j;          DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- target_total:%lld desired_total:%.2f (%.2f%%) actual_total:%.2f (%.2f%%)\n",
408                            rc->target,
409                            rc->desired_total,
410                            100*rc->desired_total/(double)rc->target,
411                            rc->real_total,
412                            100*rc->real_total/(double)rc->target);
413    
414      for (i=0; i<3; i++) {          free(rc->keyframe_locations);
415          rc->count[i]=0;          free(rc->stats);
416          rc->tot_length[i] = 0;          free(rc);
417          rc->last_quant[i] = 0;          return(0);
418      }      }
419    
420      for (i=j=0; i<rc->num_frames; i++) {  /*----------------------------------------------------------------------------
421          stat_t * s = &rc->stats[i];   *--------------------------------------------------------------------------*/
422    
423          rc->count[s->type-1]++;  static int
424          rc->tot_length[s->type-1] += s->length;  rc_2pass2_before(rc_2pass2_t * rc, xvid_plg_data_t * data)
425    {
426            twopass_stat_t * s = &rc->stats[data->frame_num];
427            double dbytes;
428            double scaled_quant;
429            double overflow;
430            int capped_to_max_framesize = 0;
431    
432          if (i == 0 || s->length < rc->min_length[s->type-1]) {          /* This function is quite long but easy to understand. In order to simplify
433              rc->min_length[s->type-1] = s->length;           * the code path (a bit), we treat 3 cases that can return immediatly. */
         }  
434    
435          if (i == 0 || s->length > rc->max_length) {          /* First case: Another plugin has already set a quantizer */
436              rc->max_length = s->length;          if (data->quant > 0)
437          }                  return(0);
438    
439          if (s->type == XVID_TYPE_IVOP) {          /* Second case: insufficent stats data */
440              rc->keyframe_locations[j] = i;          if (data->frame_num >= rc->num_frames) {
441              j++;                  DPRINTF(XVID_DEBUG_RC,"[xvid rc] -- stats file too short (now processing frame %d)",
442          }                          data->frame_num);
443                    return(0);
444      }      }
445    
446          /*          /* Third case: We are in a Quant zone */
447           * The "per sequence" overflow system considers a natural sequence to be          if (s->zone_mode == XVID_ZONE_QUANT) {
448           * formed by all frames between two iframes, so if we want to make sure                  rc->fq_error += s->weight;
449           * the system does not go nuts during last sequence, we force the last                  data->quant = (int)rc->fq_error;
450           * frame to appear in the keyframe locations array.                  rc->fq_error -= data->quant;
451           */  
452      rc->keyframe_locations[j] = i;                  s->desired_length = s->length;
453    
454                    return(0);
455  }  }
456    
457    
458  /* calculate zone weight "center" */          /*************************************************************************/
459            /*************************************************************************/
460            /*************************************************************************/
461    
462  static void zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create)          /*-------------------------------------------------------------------------
463  {           * Frame bit allocation first part
464      int i,j;           *
465      int n = 0;           * First steps apply user settings, just like it is done in the theoritical
466             * scaled_curve_apply_advanced_parameters
467             *-----------------------------------------------------------------------*/
468    
469      rc->avg_weight = 0.0;          /* Set desired to what we are wanting to obtain for this frame */
470      rc->tot_quant = 0;          dbytes = (double)s->scaled_length;
471    
472            /* IFrame user settings*/
473            if (s->type == XVID_TYPE_IVOP) {
474                    /* Keyframe boosting -- All keyframes benefit from it */
475                    dbytes += dbytes*rc->param.keyframe_boost / 100;
476    
477    #if 0 /* ToDo: decide how to apply kfthresholding */
478    #endif
479            } else {
480    
481      if (create->num_zones == 0) {                  /* P/S/B frames must reserve some bits for iframe boosting */
482          for (j = 0; j < rc->num_frames; j++) {                  dbytes *= rc->pb_iboost_tax_ratio;
483              rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;  
484              rc->stats[j].weight = 1.0;                  /* Apply assymetric curve compression */
485                    if (rc->param.curve_compression_high || rc->param.curve_compression_low) {
486                            double assymetric_delta;
487    
488                            /* Compute the assymetric delta, this is computed before applying
489                             * the tax, as done in the pre_process function */
490                            if (dbytes > rc->avg_length[s->type-1])
491                                    assymetric_delta = (rc->avg_length[s->type-1] - dbytes) * rc->param.curve_compression_high / 100.0;
492                            else
493                                    assymetric_delta = (rc->avg_length[s->type-1] - dbytes) * rc->param.curve_compression_low  / 100.0;
494    
495                            /* Now we must apply the assymetric tax, else our curve compression
496                             * would not give a theoritical target size equal to what it is
497                             * expected */
498                            dbytes *= rc->assymetric_tax_ratio;
499    
500                            /* Now we can add the assymetric delta */
501                            dbytes += assymetric_delta;
502          }          }
         rc->avg_weight += rc->num_frames * 1.0;  
         n += rc->num_frames;  
503      }      }
504    
505            /* That is what we would like to have -- Don't put that chunk after
506             * overflow control, otherwise, overflow is counted twice and you obtain
507             * half sized bitrate sequences */
508            s->desired_length  = (int)dbytes;
509            rc->desired_total += dbytes;
510    
511      for(i=0; i < create->num_zones; i++) {          /*------------------------------------------------------------------------
512             * Frame bit allocation: overflow control part.
513             *
514             * Unlike the theoritical scaled_curve_apply_advanced_parameters, here
515             * it's real encoding and we need to make sure we don't go so far from
516             * what is our ideal scaled curve.
517             *-----------------------------------------------------------------------*/
518    
519          int next = (i+1<create->num_zones) ? create->zones[i+1].frame : rc->num_frames;          /* Compute the overflow we should compensate */
520            if (s->type != XVID_TYPE_IVOP) {
521                    double frametype_factor;
522                    double framesize_factor;
523    
524          if (i==0 && create->zones[i].frame > 0) {                  /* Take only the desired part of overflow */
525              for (j = 0; j < create->zones[i].frame && j < rc->num_frames; j++) {                  overflow = rc->overflow;
                 rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;  
                 rc->stats[j].weight = 1.0;  
             }  
             rc->avg_weight += create->zones[i].frame * 1.0;  
             n += create->zones[i].frame;  
         }  
526    
527          if (create->zones[i].mode == XVID_ZONE_WEIGHT) {                  /* Factor that will take care to decrease the overflow applied
528              for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) {                   * according to the importance of this frame type in term of
529                  rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;                   * overall size */
530                  rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base;                  frametype_factor  = rc->count[XVID_TYPE_IVOP-1]*rc->avg_length[XVID_TYPE_IVOP-1];
531              }                  frametype_factor += rc->count[XVID_TYPE_PVOP-1]*rc->avg_length[XVID_TYPE_PVOP-1];
532              next -= create->zones[i].frame;                  frametype_factor += rc->count[XVID_TYPE_BVOP-1]*rc->avg_length[XVID_TYPE_BVOP-1];
533              rc->avg_weight += (double)(next * create->zones[i].increment) / (double)create->zones[i].base;                  frametype_factor /= rc->count[s->type-1]*rc->avg_length[s->type-1];
534              n += next;                  frametype_factor  = 1/frametype_factor;
535          }else{  // XVID_ZONE_QUANT  
536              for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) {                  /* Factor that will take care not to compensate too much for this frame
537                  rc->stats[j].zone_mode = XVID_ZONE_QUANT;                   * size */
538                  rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base;                  framesize_factor  = dbytes;
539                  rc->tot_quant += rc->stats[j].length;                  framesize_factor /= rc->avg_length[s->type-1];
540              }  
541                    /* Treat only the overflow part concerned by this frame type and size */
542                    overflow *= frametype_factor;
543    #if 0
544                    /* Leave this one alone, as it impacts badly on quality */
545                    overflow *= framesize_factor;
546    #endif
547    
548                    /* Apply the overflow strength imposed by the user */
549                    overflow *= (rc->param.overflow_control_strength/100.0f);
550            } else {
551                    /* no overflow applied in IFrames because:
552                     *  - their role is important as they're references for P/BFrames.
553                     *  - there aren't much in typical sequences, so if an IFrame overflows too
554                     *    much, this overflow may impact the next IFrame too much and generate
555                     *    a sequence of poor quality frames */
556                    overflow = 0;
557          }          }
558    
559            /* Make sure we are not trying to compensate more overflow than we even have */
560            if (fabs(overflow) > fabs(rc->overflow))
561                    overflow = rc->overflow;
562    
563            /* Make sure the overflow doesn't make the frame size to get out of the range
564             * [-max_degradation..+max_improvment] */
565            if (overflow > dbytes*rc->param.max_overflow_improvement / 100) {
566                    if(overflow <= dbytes)
567                            dbytes += dbytes * rc->param.max_overflow_improvement / 100;
568                    else
569                            dbytes += overflow * rc->param.max_overflow_improvement / 100;
570            } else if (overflow < - dbytes * rc->param.max_overflow_degradation / 100) {
571                    dbytes -= dbytes * rc->param.max_overflow_degradation / 100;
572            } else {
573                    dbytes += overflow;
574      }      }
     rc->avg_weight = n>0 ? rc->avg_weight/n : 1.0;  
575    
576      DPRINTF(XVID_DEBUG_RC, "center_weight: %f (for %i frames);   fixed_bytes: %i\n", rc->avg_weight, n, rc->tot_quant);          /*-------------------------------------------------------------------------
577             * Frame bit allocation last part:
578             *
579             * Cap frame length so we don't reach neither bigger frame sizes than first
580             * pass nor smaller than the allowed minimum.
581             *-----------------------------------------------------------------------*/
582    
583            if (dbytes > s->length) {
584                    dbytes = s->length;
585            } else if (dbytes < rc->min_length[s->type-1]) {
586                    dbytes = rc->min_length[s->type-1];
587            } else if (dbytes > rc->max_length) {
588                    /* ToDo: this condition is always wrong as max_length == maximum frame
589                     * length of first pass, so the first condition already caps the frame
590                     * size... */
591                    capped_to_max_framesize = 1;
592                    dbytes = rc->max_length;
593                    DPRINTF(XVID_DEBUG_RC,"[xvid rc] -- frame:%d Capped to maximum frame size\n",
594                                    data->frame_num);
595  }  }
596    
597            /*------------------------------------------------------------------------
598             * Desired frame length <-> quantizer mapping
599             *-----------------------------------------------------------------------*/
600    
601  /* scale the curve */          /* For bframes we must retrieve the original quant used (sent to xvidcore)
602             * as core applies the bquant formula before writing the stat log entry */
603            if(s->type == XVID_TYPE_BVOP) {
604    
605  static void internal_scale(rc_2pass2_t *rc)                  twopass_stat_t *b_ref = s;
 {  
         int64_t target  = rc->target - rc->tot_quant;  
         int64_t pass1_length = rc->tot_length[0] + rc->tot_length[1] + rc->tot_length[2] - rc->tot_quant;  
         int min_size[3];  
         double scaler;  
         int i;  
606    
607                    /* Find the reference frame */
608                    while(b_ref != &rc->stats[0] && b_ref->type == XVID_TYPE_BVOP)
609                            b_ref--;
610    
611          /* perform an initial scale pass.                  /* Compute the original quant */
612             if a frame size is scaled underneath our hardcoded minimums, then we force the                  s->quant  = 2*(100*s->quant - data->bquant_offset);
613             frame size to the minimum, and deduct the original & scaled frmae length from the                  s->quant += data->bquant_ratio - 1; /* to avoid rouding issues */
614             original and target total lengths */                  s->quant  = s->quant/data->bquant_ratio - b_ref->quant;
615            }
         min_size[0] = ((rc->stats[0].blks[0]*22) + 240) / 8;  
         min_size[1] = (rc->stats[0].blks[0] + 88) / 8;  
         min_size[2] = 8;  
616    
617          scaler = (double)target / (double)pass1_length;          /* Don't laugh at this very 'simple' quant<->filesize relationship, it
618             * proves to be acurate enough for our algorithm */
619            scaled_quant = (double)s->quant*(double)s->length/(double)dbytes;
620    
621          if (target <= 0 || pass1_length <= 0 || target >= pass1_length) {  #ifdef COMPENSATE_FORMULA
622                  DPRINTF(XVID_DEBUG_RC, "undersize warning\n");          /* We know xvidcore will apply the bframe formula again, so we compensate
623          scaler = 1.0;           * it right now to make sure we would not apply it twice */
624          }          if(s->type == XVID_TYPE_BVOP) {
625    
626      DPRINTF(XVID_DEBUG_RC, "target=%i, tot_length=%i, scaler=%f\n", (int)target, (int)pass1_length, scaler);                  twopass_stat_t *b_ref = s;
627    
628          for (i=0; i<rc->num_frames; i++) {                  /* Find the reference frame */
629                  stat_t * s = &rc->stats[i];                  while(b_ref != &rc->stats[0] && b_ref->type == XVID_TYPE_BVOP)
630                  int len;                          b_ref--;
631    
632                    /* Compute the quant it would be if the core did not apply the bframe
633                     * formula */
634                    scaled_quant  = 100*scaled_quant - data->bquant_offset;
635                    scaled_quant += data->bquant_ratio - 1; /* to avoid rouding issues */
636                    scaled_quant /= data->bquant_ratio;
637            }
638    #endif
639    
640          if (s->zone_mode == XVID_ZONE_QUANT) {          /* Quantizer has been scaled using floating point operations/results, we
641              s->scaled_length = s->length;           * must cast it to integer */
642          }else {          data->quant = (int)scaled_quant;
643                      len = (int)((double)s->length * scaler * s->weight / rc->avg_weight);  
644                      if (len < min_size[s->type-1]) {            /* force frame size */          /* Let's clip the computed quantizer, if needed */
645                              s->scaled_length = min_size[s->type-1];          if (data->quant < 1) {
646                              target -= s->scaled_length;                  data->quant = 1;
647                              pass1_length -= s->length;          } else if (data->quant > 31) {
648                    data->quant = 31;
649                      }else{                      }else{
650                              s->scaled_length = 0;  
651                      }                  /* The frame quantizer has not been clipped, this appears to be a good
652                     * computed quantizer, do not loose quantizer decimal part that we
653                     * accumulate for later reuse when its sum represents a complete
654                     * unit. */
655                    rc->quant_error[s->type-1][data->quant] += scaled_quant - (double)data->quant;
656    
657                    if (rc->quant_error[s->type-1][data->quant] >= 1.0) {
658                            rc->quant_error[s->type-1][data->quant] -= 1.0;
659                            data->quant++;
660                    } else if (rc->quant_error[s->type-1][data->quant] <= -1.0) {
661                            rc->quant_error[s->type-1][data->quant] += 1.0;
662                            data->quant--;
663          }          }
664          }          }
665    
666      scaler = (double)target / (double)pass1_length;          /* Now we have a computed quant that is in the right quante range, with a
667      if (target <= 0 || pass1_length <= 0 || target >= pass1_length) {           * possible +1 correction due to cumulated error. We can now safely clip
668                  DPRINTF(XVID_DEBUG_RC,"undersize warning\n");           * the quantizer again with user's quant ranges. "Safely" means the Rate
669                  scaler = 1.0;           * Control could learn more about this quantizer, this knowledge is useful
670             * for future frames even if it this quantizer won't be really used atm,
671             * that's why we don't perform this clipping earlier. */
672            if (data->quant < data->min_quant[s->type-1]) {
673                    data->quant = data->min_quant[s->type-1];
674            } else if (data->quant > data->max_quant[s->type-1]) {
675                    data->quant = data->max_quant[s->type-1];
676          }          }
677    
678          DPRINTF(XVID_DEBUG_RC, "target=%i, tot_length=%i, scaler=%f\n", (int)target, (int)pass1_length, scaler);          /* To avoid big quality jumps from frame to frame, we apply a "security"
679             * rule that makes |last_quant - new_quant| <= 2. This rule only applies
680          for (i=0; i<rc->num_frames; i++) {           * to predicted frames (P and B) */
681                  stat_t * s = &rc->stats[i];          if (s->type != XVID_TYPE_IVOP && rc->last_quant[s->type-1] && capped_to_max_framesize == 0) {
682    
683                  if (s->scaled_length==0) {      /* ignore frame with forced frame sizes */                  if (data->quant > rc->last_quant[s->type-1] + 2) {
684                          s->scaled_length = (int)((double)s->length * scaler * s->weight / rc->avg_weight);                          data->quant = rc->last_quant[s->type-1] + 2;
685                            DPRINTF(XVID_DEBUG_RC,
686                                            "[xvid rc] -- frame %d p/b-frame quantizer prevented from rising too steeply\n",
687                                            data->frame_num);
688                  }                  }
689                    if (data->quant < rc->last_quant[s->type-1] - 2) {
690                            data->quant = rc->last_quant[s->type-1] - 2;
691                            DPRINTF(XVID_DEBUG_RC,
692                                            "[xvid rc] -- frame:%d p/b-frame quantizer prevented from falling too steeply\n",
693                                            data->frame_num);
694          }          }
695  }  }
696    
697            /* We don't want to pollute the RC histerisis when our computed quant has
698             * been computed from a capped frame size */
699            if (capped_to_max_framesize == 0)
700                    rc->last_quant[s->type-1] = data->quant;
701    
702            /* Don't forget to force 1st pass frame type ;-) */
703            data->type = s->type;
704    
705            /* Store the quantizer into the statistics -- Used to compensate the double
706             * formula symptom */
707            s->quant2 = data->quant;
708    
709  void pre_process1(rc_2pass2_t * rc)          return 0;
 {  
     int i;  
     double total1, total2;  
     uint64_t ivop_boost_total;  
   
     ivop_boost_total = 0;  
     rc->curve_comp_error = 0;  
   
     for (i=0; i<3; i++) {  
         rc->tot_scaled_length[i] = 0;  
710      }      }
711    
712      for (i=0; i<rc->num_frames; i++) {  /*----------------------------------------------------------------------------
713          stat_t * s = &rc->stats[i];   *--------------------------------------------------------------------------*/
714    
715          rc->tot_scaled_length[s->type-1] += s->scaled_length;  static int
716    rc_2pass2_after(rc_2pass2_t * rc, xvid_plg_data_t * data)
717    {
718            const char frame_type[4] = { 'i', 'p', 'b', 's'};
719            twopass_stat_t * s = &rc->stats[data->frame_num];
720    
721          if (s->type == XVID_TYPE_IVOP) {          /* Insufficent stats data */
722              ivop_boost_total += s->scaled_length * rc->param.keyframe_boost / 100;          if (data->frame_num >= rc->num_frames)
723          }                  return 0;
724    
725            /* Update the quantizer counter */
726            rc->quant_count[s->type-1][data->quant]++;
727    
728            /* Update the frame type overflow */
729            if (data->type == XVID_TYPE_IVOP) {
730                    int kfdiff = 0;
731    
732                    if(rc->KF_idx != rc->num_frames -1) {
733                            kfdiff  = rc->keyframe_locations[rc->KF_idx+1];
734                            kfdiff -= rc->keyframe_locations[rc->KF_idx];
735      }      }
736    
737      rc->movie_curve = ((double)(rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1] + ivop_boost_total) /                  /* Flush Keyframe overflow accumulator */
738                                          (rc->tot_scaled_length[XVID_TYPE_PVOP-1] + rc->tot_scaled_length[XVID_TYPE_BVOP-1]));                  rc->overflow += rc->KFoverflow;
739    
740      for(i=0; i<3; i++) {                  /* Store the frame overflow to the keyframe accumulator */
741          if (rc->count[i] == 0 || rc->movie_curve == 0) {                  rc->KFoverflow = s->desired_length - data->length;
742              rc->avg_length[i] = 1;  
743                    if (kfdiff > 1) {
744                            /* Non-consecutive keyframes case:
745                             * We can then divide this total keyframe overflow into equal parts
746                             * that we will distribute into regular overflow at each frame
747                             * between the sequence bounded by two IFrames */
748                            rc->KFoverflow_partial = rc->KFoverflow / (kfdiff - 1);
749          }else{          }else{
750              rc->avg_length[i] = rc->tot_scaled_length[i] / rc->count[i] / rc->movie_curve;                          /* Consecutive keyframes case:
751          }                           * Flush immediatly the keyframe overflow and reset keyframe
752                             * overflow */
753                            rc->overflow += rc->KFoverflow;
754                            rc->KFoverflow = 0;
755                            rc->KFoverflow_partial = 0;
756      }      }
757                    rc->KF_idx++;
758            } else {
759                    /* Accumulate the frame overflow */
760                    rc->overflow += s->desired_length - data->length;
761    
762      /* alt curve stuff here */                  /* Distribute part of the keyframe overflow */
763                    rc->overflow += rc->KFoverflow_partial;
764    
765      if (rc->param.use_alt_curve) {                  /* Don't forget to substract that same amount from the total keyframe
766          const double avg_pvop = rc->avg_length[XVID_TYPE_PVOP-1];                   * overflow */
767          const uint64_t tot_pvop = rc->tot_length[XVID_TYPE_PVOP-1];                  rc->KFoverflow -= rc->KFoverflow_partial;
768          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];  
769    
770                  rc->alt_curve_low = avg_pvop - avg_pvop * (double)rc->param.alt_curve_low_dist / 100.0;          rc->overflow += s->error = s->desired_length - data->length;
771                  rc->alt_curve_low_diff = avg_pvop - rc->alt_curve_low;          rc->real_total += data->length;
                 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;  
772    
773          if (rc->param.alt_curve_use_auto) {          DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- frame:%d type:%c quant:%d stats:%d scaled:%d desired:%d actual:%d error:%d overflow:%.2f\n",
774              if (tot_bvop + tot_pvop > tot_scaled_bvop + tot_scaled_pvop) {                          data->frame_num,
775                                  rc->param.alt_curve_min_rel_qual = (int)(100.0 - (100.0 - 100.0 /                          frame_type[data->type-1],
776                                          ((double)(tot_pvop + tot_bvop) / (double)(tot_scaled_pvop + tot_scaled_bvop))) * (double)rc->param.alt_curve_auto_str / 100.0);                          data->quant,
777                            s->length,
778                            s->scaled_length,
779                            s->desired_length,
780                            s->desired_length - s->error,
781                            -s->error,
782                            rc->overflow);
783    
784                                  if (rc->param.alt_curve_min_rel_qual < 20)          return(0);
                                         rc->param.alt_curve_min_rel_qual = 20;  
             }else{  
                                 rc->param.alt_curve_min_rel_qual = 100;  
             }  
785          }          }
                 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;  
786    
787          if (rc->param.alt_curve_low_dist > 100) {  /*****************************************************************************
788                          switch(rc->param.alt_curve_type) {   * Helper functions definition
789              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)));  
                         }  
                 }  
     }  
     /* --- */  
790    
791    /* Default buffer size for reading lines */
792    #define BUF_SZ   1024
793    
794      total1=total2=0;  /* Helper functions for reading/parsing the stats file */
795      for (i=0; i<rc->num_frames; i++) {  static char *skipspaces(char *string);
796          stat_t * s = &rc->stats[i];  static int iscomment(char *string);
797    static char *readline(FILE *f);
798    
799    /* This function counts the number of frame entries in the stats file
800     * It also counts the number of I Frames */
801    static int
802    statsfile_count_frames(rc_2pass2_t * rc, char * filename)
803    {
804            FILE * f;
805            char *line;
806            int lines;
807    
808          if (s->type != XVID_TYPE_IVOP) {          rc->num_frames = 0;
809              double dbytes,dbytes2;          rc->num_keyframes = 0;
810    
811              dbytes = s->scaled_length / rc->movie_curve;          if ((f = fopen(filename, "rb")) == NULL)
812              dbytes2 = 0; /* XXX: warning */                  return(-1);
             total1 += dbytes;  
             if (s->type == XVID_TYPE_BVOP)  
                 dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1];  
813    
814              if (rc->param.use_alt_curve) {          lines = 0;
815                  if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) {          while ((line = readline(f)) != NULL) {
816    
817                      if (dbytes >= rc->alt_curve_high) {                  char *ptr;
818                                                  dbytes2 = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev);                  char type;
819                      }else{                  int fields;
                                                 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))));  
                                                 }  
                                         }  
820    
821                  }                  lines++;
822    
823                    /* We skip spaces */
824                    ptr = skipspaces(line);
825    
826              }else{                  /* Skip coment lines or empty lines */
827                  if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) {                  if(iscomment(ptr) || *ptr == '\0') {
828                      dbytes2=((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_high / 100.0);                          free(line);
829                  }else{                          continue;
                                 dbytes2 = ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0);  
                 }  
830              }              }
831    
832              if (s->type == XVID_TYPE_BVOP) {                  /* Read the stat line from buffer */
833                              dbytes2 *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];                  fields = sscanf(ptr, "%c", &type);
834                              if (dbytes2 < rc->min_length[XVID_TYPE_BVOP-1])  
835                                      dbytes2 = rc->min_length[XVID_TYPE_BVOP-1];                  /* Valid stats files have at least 6 fields */
836              }else{                  if (fields == 1) {
837                              if (dbytes2 < rc->min_length[XVID_TYPE_PVOP-1])                          switch(type) {
838                                      dbytes2 = rc->min_length[XVID_TYPE_PVOP-1];                          case 'i':
839                            case 'I':
840                                    rc->num_keyframes++;
841                            case 'p':
842                            case 'P':
843                            case 'b':
844                            case 'B':
845                            case 's':
846                            case 'S':
847                                    rc->num_frames++;
848                                    break;
849                            default:
850                                    DPRINTF(XVID_DEBUG_RC,
851                                                    "[xvid rc] -- WARNING: L%d unknown frame type used (%c).\n",
852                                                    lines, type);
853              }              }
854              total2 += dbytes2;                  } else {
855                                    DPRINTF(XVID_DEBUG_RC,
856                                                    "[xvid rc] -- WARNING: L%d misses some stat fields (%d).\n",
857                                                    lines, 6-fields);
858          }          }
859    
860                    /* Free the line buffer */
861                    free(line);
862      }      }
863    
864      rc->curve_comp_scale = total1 / total2;          /* We are done with the file */
865            fclose(f);
866    
867      if (!rc->param.use_alt_curve) {          return(0);
         DPRINTF(XVID_DEBUG_RC, "middle frame size for asymmetric curve compression: %i\n",  
             (int)(rc->avg_length[XVID_TYPE_PVOP-1] * rc->curve_comp_scale));  
868      }      }
869    
870      if (rc->param.use_alt_curve) {  /* open stats file(s) and read into rc->stats array */
871          int bonus_bias = rc->param.alt_curve_bonus_bias;  static int
872          int oldquant = 1;  statsfile_load(rc_2pass2_t *rc, char * filename)
873    {
874            FILE * f;
875            int processed_entries;
876    
877              if (rc->param.alt_curve_use_auto_bonus_bias)          /* Opens the file */
878                      bonus_bias = rc->param.alt_curve_min_rel_qual;          if ((f = fopen(filename, "rb"))==NULL)
879                    return(-1);
880    
881              rc->alt_curve_curve_bias_bonus = (total1 - total2) * (double)bonus_bias / 100.0 / (double)(rc->num_frames /* - credits_frames */ - rc->num_keyframes);          processed_entries = 0;
882              rc->curve_comp_scale = ((total1 - total2) * (1.0 - (double)bonus_bias / 100.0) + total2) / total2;          while(processed_entries < rc->num_frames) {
883                    char type;
884                    int fields;
885                    twopass_stat_t * s = &rc->stats[processed_entries];
886                    char *line, *ptr;
887    
888                    /* Read the line from the file */
889                    if((line = readline(f)) == NULL)
890                            break;
891    
892          /* special info for alt curve:  bias bonus and quantizer thresholds */                  /* We skip spaces */
893                    ptr = skipspaces(line);
894    
895                  DPRINTF(XVID_DEBUG_RC, "avg scaled framesize:%i", (int)rc->avg_length[XVID_TYPE_PVOP-1]);                  /* Skip comment lines or empty lines */
896                  DPRINTF(XVID_DEBUG_RC, "bias bonus:%i bytes", (int)rc->alt_curve_curve_bias_bonus);                  if(iscomment(ptr) || *ptr == '\0') {
897                            free(line);
898                            continue;
899                    }
900    
901                  for (i=1; i <= (int)(rc->alt_curve_high*2)+1; i++) {                  /* Reset this field that is optional */
902              double curve_temp, dbytes;                  s->scaled_length = 0;
             int newquant;  
903    
904              dbytes = i;                  /* Convert the fields */
905                          if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) {                  fields = sscanf(ptr,
906                  if (dbytes >= rc->alt_curve_high) {                                                  "%c %d %d %d %d %d %d\n",
907                                          curve_temp = dbytes * (rc->alt_curve_mid_qual - rc->alt_curve_qual_dev);                                                  &type,
908                  }else{                                                  &s->quant,
909                                          switch(rc->param.alt_curve_type)                                                  &s->blks[0], &s->blks[1], &s->blks[2],
910                                          {                                                  &s->length,
911                                          case XVID_CURVE_SINE :                                                  &s->scaled_length);
912                                                  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)));  
913                                                  break;                  /* Free line buffer, we don't need it anymore */
914                                          case XVID_CURVE_LINEAR :                  free(line);
915                                                  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);  
916                    /* Fail silently, this has probably been warned in
917                     * statsfile_count_frames */
918                    if(fields != 6 && fields != 7)
919                            continue;
920    
921                    /* Convert frame type */
922                    switch(type) {
923                    case 'i':
924                    case 'I':
925                            s->type = XVID_TYPE_IVOP;
926                                                  break;                                                  break;
927                                          case XVID_CURVE_COSINE :                  case 'p':
928                                                  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))));                  case 'P':
929                                          }                  case 's':
930                                  }                  case 'S':
931                          }else{                          s->type = XVID_TYPE_PVOP;
                 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)));  
932                                                  break;                                                  break;
933                                          case XVID_CURVE_LINEAR :                  case 'b':
934                                                  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);                  case 'B':
935                            s->type = XVID_TYPE_BVOP;
936                                                  break;                                                  break;
937                                          case XVID_CURVE_COSINE :                  default:
938                                                  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))));                          /* Same as before, fail silently */
939                                          }                          continue;
940                                  }                                  }
                         }  
   
                         if (rc->movie_curve > 1.0)  
                                 dbytes *= rc->movie_curve;  
941    
942                          newquant = (int)(dbytes * 2.0 / (curve_temp * rc->curve_comp_scale + rc->alt_curve_curve_bias_bonus));                  /* Ok it seems it's been processed correctly */
943                          if (newquant > 1) {                  processed_entries++;
                                 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;  
                                         DPRINTF(XVID_DEBUG_RC, "quant:%i threshold at %i : %i percent", newquant, i, percent);  
                                 }  
                         }  
944                  }                  }
945    
946      }          /* Close the file */
947            fclose(f);
948    
949      rc->overflow = 0;          return(0);
     rc->KFoverflow = 0;  
     rc->KFoverflow_partial = 0;  
     rc->KF_idx = 1;  
950  }  }
951    
952    /* pre-process the statistics data
953     * - for each type, count, tot_length, min_length, max_length
954     * - set keyframes_locations */
955  static int rc_2pass2_create(xvid_plg_create_t * create, rc_2pass2_t ** handle)  static void
956    first_pass_stats_prepare_data(rc_2pass2_t * rc)
957  {  {
958      xvid_plugin_2pass2_t * param = (xvid_plugin_2pass2_t *)create->param;          int i,j;
     rc_2pass2_t * rc;  
     int i;  
959    
960      rc = malloc(sizeof(rc_2pass2_t));          /* *rc fields initialization
961      if (rc == NULL)           * NB: INT_MAX and INT_MIN are used in order to be immediately replaced
962          return XVID_ERR_MEMORY;           *     with real values of the 1pass */
963            for (i=0; i<3; i++) {
964                    rc->count[i]=0;
965                    rc->tot_length[i] = 0;
966                    rc->min_length[i] = INT_MAX;
967            }
968    
969      rc->param = *param;          rc->max_length = INT_MIN;
970    
971      if (rc->param.keyframe_boost <= 0) rc->param.keyframe_boost = 0;          /* Loop through all frames and find/compute all the stuff this function
972      if (rc->param.payback_method <= 0) rc->param.payback_method = XVID_PAYBACK_PROP;           * is supposed to do */
973      if (rc->param.bitrate_payback_delay <= 0) rc->param.bitrate_payback_delay = 250;          for (i=j=0; i<rc->num_frames; i++) {
974      if (rc->param.curve_compression_high <= 0) rc->param.curve_compression_high = 0;                  twopass_stat_t * s = &rc->stats[i];
     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.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;  
975    
976      if (!det_stats_length(rc, param->filename)){                  rc->count[s->type-1]++;
977          DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename);                  rc->tot_length[s->type-1] += s->length;
         free(rc);  
         return XVID_ERR_FAIL;  
     }  
978    
979      if ((rc->stats = malloc(rc->num_frames * sizeof(stat_t))) == NULL) {                  if (s->length < rc->min_length[s->type-1]) {
980          free(rc);                          rc->min_length[s->type-1] = s->length;
         return XVID_ERR_MEMORY;  
981      }      }
982    
983      /*                  if (s->length > rc->max_length) {
984           * We need an extra location because we do as if the last frame were an                          rc->max_length = s->length;
          * IFrame. This is needed because our code consider that frames between  
          * 2 IFrames form a natural sequence. So we store last frame as a  
          * keyframe location.  
          */  
     if ((rc->keyframe_locations = malloc((rc->num_keyframes + 1) * sizeof(int))) == NULL) {  
         free(rc->stats);  
         free(rc);  
         return XVID_ERR_MEMORY;  
985      }      }
986    
987      if (!load_stats(rc, param->filename)) {                  if (s->type == XVID_TYPE_IVOP) {
988          DPRINTF(XVID_DEBUG_RC,"fopen %s failed\n", param->filename);                          rc->keyframe_locations[j] = i;
989          free(rc->keyframe_locations);                          j++;
990          free(rc->stats);                  }
         free(rc);  
         return XVID_ERR_FAIL;  
991      }      }
992    
993      /* pre-process our stats */          /* NB:
994             * The "per sequence" overflow system considers a natural sequence to be
995             * formed by all frames between two iframes, so if we want to make sure
996             * the system does not go nuts during last sequence, we force the last
997             * frame to appear in the keyframe locations array. */
998            rc->keyframe_locations[j] = i;
999    
1000          if (rc->num_frames  < create->fbase/create->fincr) {          DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Min 1st pass IFrame length: %d\n", rc->min_length[0]);
1001                  rc->target = rc->param.bitrate / 8;     /* one second */          DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Min 1st pass PFrame length: %d\n", rc->min_length[1]);
1002          }else{          DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Min 1st pass BFrame length: %d\n", rc->min_length[2]);
                 rc->target = (rc->param.bitrate * rc->num_frames * create->fincr) / (create->fbase * 8);  
1003          }          }
1004    
1005      DPRINTF(XVID_DEBUG_RC, "rc->target : %i\n", rc->target);  /* calculate zone weight "center" */
1006    static void
1007  #if 0  zone_process(rc_2pass2_t *rc, const xvid_plg_create_t * create)
1008          rc->target -= rc->num_frames*24;        /* avi file header */  {
1009  #endif          int i,j;
1010            int n = 0;
1011    
1012            rc->avg_weight = 0.0;
1013            rc->tot_quant = 0;
1014    
         pre_process0(rc);  
1015    
1016          if (rc->param.bitrate) {          if (create->num_zones == 0) {
1017          zone_process(rc, create);                  for (j = 0; j < rc->num_frames; j++) {
1018                  internal_scale(rc);                          rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;
1019      }else{                          rc->stats[j].weight = 1.0;
         /* external scaler: ignore zone */  
         for (i=0;i<rc->num_frames;i++) {  
             rc->stats[i].zone_mode = XVID_ZONE_WEIGHT;  
             rc->stats[i].weight = 1.0;  
1020          }          }
1021          rc->avg_weight = 1.0;                  rc->avg_weight += rc->num_frames * 1.0;
1022          rc->tot_quant = 0;                  n += rc->num_frames;
1023      }      }
         pre_process1(rc);  
1024    
     for (i=0; i<32;i++) {  
         rc->pquant_error[i] = 0;  
         rc->bquant_error[i] = 0;  
         rc->quant_count[i] = 0;  
     }  
1025    
1026      rc->fq_error = 0;          for(i=0; i < create->num_zones; i++) {
1027    
1028      *handle = rc;                  int next = (i+1<create->num_zones) ? create->zones[i+1].frame : rc->num_frames;
         return(0);  
 }  
1029    
1030                    if (i==0 && create->zones[i].frame > 0) {
1031                            for (j = 0; j < create->zones[i].frame && j < rc->num_frames; j++) {
1032                                    rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;
1033                                    rc->stats[j].weight = 1.0;
1034                            }
1035                            rc->avg_weight += create->zones[i].frame * 1.0;
1036                            n += create->zones[i].frame;
1037                    }
1038    
1039  static int rc_2pass2_destroy(rc_2pass2_t * rc, xvid_plg_destroy_t * destroy)                  if (create->zones[i].mode == XVID_ZONE_WEIGHT) {
1040  {                          for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) {
1041      free(rc->keyframe_locations);                                  rc->stats[j].zone_mode = XVID_ZONE_WEIGHT;
1042      free(rc->stats);                                  rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base;
         free(rc);  
         return(0);  
1043  }  }
1044                            next -= create->zones[i].frame;
1045                            rc->avg_weight += (double)(next * create->zones[i].increment) / (double)create->zones[i].base;
1046                            n += next;
1047                    }else{  /* XVID_ZONE_QUANT */
1048                            for (j = create->zones[i].frame; j < next && j < rc->num_frames; j++ ) {
1049                                    rc->stats[j].zone_mode = XVID_ZONE_QUANT;
1050                                    rc->stats[j].weight = (double)create->zones[i].increment / (double)create->zones[i].base;
1051                                    rc->tot_quant += rc->stats[j].length;
1052                            }
1053                    }
1054            }
1055            rc->avg_weight = n>0 ? rc->avg_weight/n : 1.0;
1056    
1057            DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- center_weight:%f (for %d frames)  fixed_bytes:%d\n", rc->avg_weight, n, rc->tot_quant);
1058    }
1059    
1060    
1061  static int rc_2pass2_before(rc_2pass2_t * rc, xvid_plg_data_t * data)  /* scale the curve */
1062    static void
1063    first_pass_scale_curve_internal(rc_2pass2_t *rc)
1064  {  {
1065      stat_t * s = &rc->stats[data->frame_num];          int64_t target;
1066      int overflow;          int64_t pass1_length;
1067      int desired;          double scaler;
1068      double dbytes;          int i, num_MBs;
     double curve_temp;  
     int capped_to_max_framesize = 0;  
1069    
1070          /*          /* We remove the bytes used by the fixed quantizer zones
1071           * This function is quite long but easy to understand. In order to simplify           * ToDo: this approach is flawed, the same amount of bytes is removed from
1072           * the code path (a bit), we treat 3 cases that can return immediatly.           *       target and first pass data, this has no sense, zone_process should
1073           */           *       give us two results one for unscaled data (1pass) and the other
1074             *       one for scaled data and we should then write:
1075             *       target = rc->target - rc->tot_quant_scaled;
1076             *       pass1_length = rc->i+p+b - rc->tot_quant_firstpass */
1077            target = rc->target - rc->tot_quant;
1078    
1079            /* Do the same for the first pass data */
1080            pass1_length  = rc->tot_length[XVID_TYPE_IVOP-1];
1081            pass1_length += rc->tot_length[XVID_TYPE_PVOP-1];
1082            pass1_length += rc->tot_length[XVID_TYPE_BVOP-1];
1083            pass1_length -= rc->tot_quant;
1084    
1085          /* First case: Another plugin has already set a quantizer */          /* Let's compute a linear scaler in order to perform curve scaling */
1086      if (data->quant > 0)          scaler = (double)target / (double)pass1_length;
                 return(0);  
1087    
1088          /* Second case: We are in a Quant zone */          if (target <= 0 || pass1_length <= 0 || target >= pass1_length) {
1089          if (s->zone_mode == XVID_ZONE_QUANT) {                  DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- WARNING: Undersize detected before correction\n");
1090                    scaler = 1.0;
1091            }
1092    
1093                  rc->fq_error += s->weight;          /* Compute min frame lengths (for each frame type) according to the number
1094                  data->quant = (int)rc->fq_error;           * of MBs. We sum all block type counters of frame 0, this gives us the
1095                  rc->fq_error -= data->quant;           * number of MBs.
1096             *
1097             * We compare these hardcoded values with observed values in first pass
1098             * (determined in pre_process0).Then we keep the real minimum. */
1099    
1100                  s->desired_length = s->length;          /* Number of MBs */
1101            num_MBs  = rc->stats[0].blks[0];
1102            num_MBs += rc->stats[0].blks[1];
1103            num_MBs += rc->stats[0].blks[2];
1104    
1105            /* Minimum for I frames */
1106            if(rc->min_length[XVID_TYPE_IVOP-1] > ((num_MBs*22) + 240) / 8)
1107                    rc->min_length[XVID_TYPE_IVOP-1] = ((num_MBs*22) + 240) / 8;
1108    
1109            /* Minimum for P/S frames */
1110            if(rc->min_length[XVID_TYPE_PVOP-1] > ((num_MBs) + 88)  / 8)
1111                    rc->min_length[XVID_TYPE_PVOP-1] = ((num_MBs) + 88)  / 8;
1112    
1113            /* Minimum for B frames */
1114            if(rc->min_length[XVID_TYPE_BVOP-1] > 8)
1115                    rc->min_length[XVID_TYPE_BVOP-1] = 8;
1116    
1117                  return(0);          /* Perform an initial scale pass.
1118             *
1119             * If a frame size is scaled underneath our hardcoded minimums, then we
1120             * force the frame size to the minimum, and deduct the original & scaled
1121             * frame length from the original and target total lengths */
1122            for (i=0; i<rc->num_frames; i++) {
1123                    twopass_stat_t * s = &rc->stats[i];
1124                    int len;
1125    
1126                    /* No need to scale frame length for which a specific quantizer is
1127                     * specified thanks to zones */
1128                    if (s->zone_mode == XVID_ZONE_QUANT) {
1129                            s->scaled_length = s->length;
1130                            continue;
1131          }          }
1132    
1133          /* Third case: insufficent stats data */                  /* Compute the scaled length */
1134          if (data->frame_num >= rc->num_frames)                  len = (int)((double)s->length * scaler * s->weight / rc->avg_weight);
                 return 0;  
   
         /*  
          * The last case is the one every normal minded developer should fear to  
          * maintain in a project :-)  
          */  
   
         /* XXX: why by 8 */  
         overflow = rc->overflow / 8;  
1135    
1136          /*                  /* Compare with the computed minimum */
1137           * The rc->overflow field represents the overflow in current scene (between two                  if (len < rc->min_length[s->type-1]) {
1138           * IFrames) so we must not forget to reset it if we are enetring a new scene                          /* This is a 'forced size' frame, set its frame size to the
1139           */                           * computed minimum */
1140          if (s->type == XVID_TYPE_IVOP) {                          s->scaled_length = rc->min_length[s->type-1];
1141                  overflow = 0;  
1142                            /* Remove both scaled and original size from their respective
1143                             * total counters, as we prepare a second pass for 'regular'
1144                             * frames */
1145                            target -= s->scaled_length;
1146                            pass1_length -= s->length;
1147                    } else {
1148                            /* Do nothing for now, we'll scale this later */
1149                            s->scaled_length = 0;
1150                    }
1151          }          }
1152    
1153          desired = s->scaled_length;          /* The first pass on data substracted all 'forced size' frames from the
1154             * total counters. Now, it's possible to scale the 'regular' frames. */
1155    
1156          dbytes = desired;          /* Scaling factor for 'regular' frames */
1157          if (s->type == XVID_TYPE_IVOP) {          scaler = (double)target / (double)pass1_length;
                 dbytes += desired * rc->param.keyframe_boost / 100;  
         }  
         dbytes /= rc->movie_curve;  
1158    
1159          /*          /* Detect undersizing */
1160           * We are now entering in the hard part of the algo, it was first designed          if (target <= 0 || pass1_length <= 0 || target >= pass1_length) {
1161           * to work with i/pframes only streams, so the way it computes things is                  DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- WARNING: Undersize detected after correction\n");
1162           * adapted to pframes only. However we can use it if we just take care to                  scaler = 1.0;
          * scale the bframes sizes to pframes sizes using the ratio avg_p/avg_p and  
          * then before really using values depending on frame sizes, scaling the  
          * value again with the inverse ratio  
          */  
         if (s->type == XVID_TYPE_BVOP) {  
                 dbytes *= rc->avg_length[XVID_TYPE_PVOP-1] / rc->avg_length[XVID_TYPE_BVOP-1];  
1163          }          }
1164    
1165          /*          /* Do another pass with the new scaler */
1166           * Apply user's choosen Payback method. Payback helps bitrate to follow the          for (i=0; i<rc->num_frames; i++) {
1167           * scaled curve "paying back" past errors in curve previsions.                  twopass_stat_t * s = &rc->stats[i];
          */  
         if (rc->param.payback_method == XVID_PAYBACK_BIAS) {  
                 desired =(int)(rc->curve_comp_error / rc->param.bitrate_payback_delay);  
         }else{  
                 desired = (int)(rc->curve_comp_error * dbytes /  
                                                 rc->avg_length[XVID_TYPE_PVOP-1] / rc->param.bitrate_payback_delay);  
1168    
1169                  if (labs(desired) > fabs(rc->curve_comp_error)) {                  /* Ignore frame with forced frame sizes */
1170                          desired = (int)rc->curve_comp_error;                  if (s->scaled_length == 0)
1171                  }                          s->scaled_length = (int)((double)s->length * scaler * s->weight / rc->avg_weight);
1172          }          }
1173    
1174          rc->curve_comp_error -= desired;          /* Job done */
1175            return;
1176    }
1177    
1178          /*  /* Apply all user settings to the scaled curve
1179           * Alt curve treatment is not that hard to understand though the formulas   * This implies:
1180           * seem to be huge. Alt treatment is basically a way to soft/harden the   *   keyframe boosting
1181           * curve flux applying sine/linear/cosine ratios   *   high/low compression */
1182           */  static void
1183    scaled_curve_apply_advanced_parameters(rc_2pass2_t * rc)
1184    {
1185            int i;
1186            int64_t ivop_boost_total;
1187    
1188          /* XXX: warning */          /* Reset the rate controller (per frame type) total byte counters */
1189          curve_temp = 0;          for (i=0; i<3; i++) rc->tot_scaled_length[i] = 0;
1190    
1191          if (rc->param.use_alt_curve) {          /* Compute total bytes for each frame type */
1192                  if (s->type != XVID_TYPE_IVOP)  {          for (i=0; i<rc->num_frames;i++) {
1193                          if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) {                  twopass_stat_t *s = &rc->stats[i];
1194                                  if (dbytes >= rc->alt_curve_high) {                  rc->tot_scaled_length[s->type-1] += s->scaled_length;
                                         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))));  
                                         }  
                                 }  
1195                          }                          }
1196    
1197                          /*          /* First we compute the total amount of bits needed, as being described by
1198                           * End of code path for curve_temp, as told earlier, we are now           * the scaled distribution. During this pass over the complete stats data,
1199                           * obliged to scale the value to a bframe one using the inverse           * we see how much bits two user settings will get/give from/to p&b frames:
1200                           * ratio applied earlier           *  - keyframe boosting
1201                           */           *  - keyframe distance penalty */
1202                          if (s->type == XVID_TYPE_BVOP)          rc->KF_idx = 0;
1203                                  curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];          ivop_boost_total = 0;
1204            for (i=0; i<rc->num_frames; i++) {
1205                    twopass_stat_t * s = &rc->stats[i];
1206    
1207                          curve_temp = curve_temp * rc->curve_comp_scale + rc->alt_curve_curve_bias_bonus;                  /* Some more work is needed for I frames */
1208                    if (s->type == XVID_TYPE_IVOP) {
1209                            int ivop_boost;
1210    
1211                          desired += ((int)curve_temp);                          /* Accumulate bytes needed for keyframe boosting */
1212                          rc->curve_comp_error += curve_temp - (int)curve_temp;                          ivop_boost = s->scaled_length*rc->param.keyframe_boost/100;
                 } else {  
                         /*  
                          * End of code path for dbytes, as told earlier, we are now  
                          * obliged to scale the value to a bframe one using the inverse  
                          * ratio applied earlier  
                          */  
                         if (s->type == XVID_TYPE_BVOP)  
                                 dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];  
1213    
1214                          desired += ((int)dbytes);  #if 0 /* ToDo: decide how to apply kfthresholding */
1215                          rc->curve_comp_error += dbytes - (int)dbytes;  #endif
1216                  }                          /* If the frame size drops under the minimum length, then cap ivop_boost */
1217                            if (ivop_boost + s->scaled_length < rc->min_length[XVID_TYPE_IVOP-1])
1218                                    ivop_boost = rc->min_length[XVID_TYPE_IVOP-1] - s->scaled_length;
1219    
1220          } else if ((rc->param.curve_compression_high + rc->param.curve_compression_low) &&      s->type != XVID_TYPE_IVOP) {                          /* Accumulate the ivop boost */
1221                            ivop_boost_total += ivop_boost;
1222    
1223                  curve_temp = rc->curve_comp_scale;                          /* Don't forget to update the keyframe index */
1224                  if (dbytes > rc->avg_length[XVID_TYPE_PVOP-1]) {                          rc->KF_idx++;
1225                          curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_high / 100.0);                  }
                 } else {  
                         curve_temp *= ((double)dbytes + (rc->avg_length[XVID_TYPE_PVOP-1] - dbytes) * rc->param.curve_compression_low / 100.0);  
1226                  }                  }
1227    
1228                  /*          /* Initialize the IBoost tax ratio for P/S/B frames
1229                   * End of code path for curve_temp, as told earlier, we are now           *
1230                   * obliged to scale the value to a bframe one using the inverse           * This ratio has to be applied to p/b/s frames in order to reserve
1231                   * ratio applied earlier           * additional bits for keyframes (keyframe boosting) or if too much
1232                   */           * keyframe distance is applied, bits retrieved from the keyframes.
1233                  if (s->type == XVID_TYPE_BVOP)           *
1234                          curve_temp *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];           * ie pb_length *= rc->pb_iboost_tax_ratio;
1235             *
1236             *    gives the ideal length of a p/b frame */
1237    
1238                  desired += (int)curve_temp;          /* Compute the total length of p/b/s frames (temporary storage into
1239                  rc->curve_comp_error += curve_temp - (int)curve_temp;           * movie_curve) */
1240          } else {          rc->pb_iboost_tax_ratio  = (double)rc->tot_scaled_length[XVID_TYPE_PVOP-1];
1241                  /*          rc->pb_iboost_tax_ratio += (double)rc->tot_scaled_length[XVID_TYPE_BVOP-1];
1242                   * End of code path for dbytes, as told earlier, we are now  
1243                   * obliged to scale the value to a bframe one using the inverse          /* Compute the ratio described above
1244                   * ratio applied earlier           *     taxed_total = sum(0, n, tax*scaled_length)
1245                   */           * <=> taxed_total = tax.sum(0, n, scaled_length)
1246                  if (s->type == XVID_TYPE_BVOP){           * <=> tax = taxed_total / original_total */
1247                          dbytes *= rc->avg_length[XVID_TYPE_BVOP-1] / rc->avg_length[XVID_TYPE_PVOP-1];          rc->pb_iboost_tax_ratio =
1248                  }                  (rc->pb_iboost_tax_ratio - ivop_boost_total) /
1249                    rc->pb_iboost_tax_ratio;
1250    
1251                  desired += (int)dbytes;          DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- IFrame boost tax ratio:%.2f\n",
1252                  rc->curve_comp_error += dbytes - (int)dbytes;                          rc->pb_iboost_tax_ratio);
         }  
1253    
1254            /* Compute the average size of frames per frame type */
1255            for(i=0; i<3; i++) {
1256                    /* Special case for missing type or weird case */
1257                    if (rc->count[i] == 0 || rc->pb_iboost_tax_ratio == 0) {
1258                            rc->avg_length[i] = 1;
1259                    } else {
1260                            rc->avg_length[i] = rc->tot_scaled_length[i];
1261    
1262          /*                          if (i == (XVID_TYPE_IVOP-1)) {
1263           * We can't do bigger frames than first pass, this would be stupid as first                                  /* I Frames total has to be added the boost total */
1264           * pass is quant=2 and that reaching quant=1 is not worth it. We would lose                                  rc->avg_length[i] += ivop_boost_total;
          * many bytes and we would not not gain much quality.  
          */  
         if (desired > s->length) {  
                 rc->curve_comp_error += desired - s->length;  
                 desired = s->length;  
1265          }else{          }else{
1266                  if (desired < rc->min_length[s->type-1]) {                                  /* P/B frames has to taxed */
1267                          if (s->type == XVID_TYPE_IVOP){                                  rc->avg_length[i] *= rc->pb_iboost_tax_ratio;
                                 rc->curve_comp_error -= rc->min_length[XVID_TYPE_IVOP-1] - desired;  
1268                          }                          }
1269                          desired = rc->min_length[s->type-1];  
1270                            /* Finally compute the average frame size */
1271                            rc->avg_length[i] /= (double)rc->count[i];
1272                  }                  }
1273          }          }
1274    
1275          s->desired_length = desired;          /* Assymetric curve compression */
1276            if (rc->param.curve_compression_high || rc->param.curve_compression_low) {
1277                    double symetric_total;
1278                    double assymetric_delta_total;
1279    
1280                    /* Like I frame boosting, assymetric curve compression modifies the total
1281                     * amount of needed bits, we must compute the ratio so we can prescale
1282                     lengths */
1283                    symetric_total = 0;
1284                    assymetric_delta_total = 0;
1285                    for (i=0; i<rc->num_frames; i++) {
1286                            double assymetric_delta;
1287                            double dbytes;
1288                            twopass_stat_t * s = &rc->stats[i];
1289    
1290          /* if this keyframe is too close to the next, reduce it's byte allotment                          /* I Frames are not concerned by assymetric scaling */
1291             XXX: why do we do this after setting the desired length  */                          if (s->type == XVID_TYPE_IVOP)
1292                                    continue;
         if (s->type == XVID_TYPE_IVOP) {  
                 int KFdistance = rc->keyframe_locations[rc->KF_idx] - rc->keyframe_locations[rc->KF_idx - 1];  
   
                 if (KFdistance < rc->param.kftreshold) {  
   
                         KFdistance = KFdistance - rc->param.min_key_interval;  
   
                         if (KFdistance >= 0) {  
                                 int KF_min_size;  
1293    
1294                                  KF_min_size = desired * (100 - rc->param.kfreduction) / 100;                          /* During the real run, we would have to apply the iboost tax */
1295                                  if (KF_min_size < 1)                          dbytes = s->scaled_length * rc->pb_iboost_tax_ratio;
                                         KF_min_size = 1;  
1296    
1297                                  desired = KF_min_size + (desired - KF_min_size) * KFdistance /                          /* Update the symmetric curve compression total */
1298                                          (rc->param.kftreshold - rc->param.min_key_interval);                          symetric_total += dbytes;
1299    
1300                                  if (desired < 1)                          /* Apply assymetric curve compression */
1301                                          desired = 1;                          if (dbytes > rc->avg_length[s->type-1])
1302                          }                                  assymetric_delta = (rc->avg_length[s->type-1] - dbytes) * (double)rc->param.curve_compression_high / 100.0f;
1303                  }                          else
1304          }                                  assymetric_delta = (rc->avg_length[s->type-1] - dbytes) * (double)rc->param.curve_compression_low  / 100.0f;
1305    
1306          overflow = (int)((double)overflow * desired / rc->avg_length[XVID_TYPE_PVOP-1]);                          /* Cap to the minimum frame size if needed */
1307                            if (dbytes + assymetric_delta < rc->min_length[s->type-1])
1308                                    assymetric_delta = rc->min_length[s->type-1] - dbytes;
1309    
1310          /* Reign in overflow with huge frames */                          /* Accumulate after assymetric curve compression */
1311          if (labs(overflow) > labs(rc->overflow)) {                          assymetric_delta_total += assymetric_delta;
                 overflow = rc->overflow;  
1312          }          }
1313    
1314          /* Make sure overflow doesn't run away */                  /* Compute the tax that all p/b frames have to pay in order to respect the
1315          if (overflow > desired * rc->param.max_overflow_improvement / 100) {                   * bit distribution changes that the assymetric compression curve imposes
1316                  desired += (overflow <= desired) ? desired * rc->param.max_overflow_improvement / 100 :                   * We want assymetric_total = sum(0, n-1, tax.scaled_length)
1317                          overflow * rc->param.max_overflow_improvement / 100;                   *      ie assymetric_total = ratio.sum(0, n-1, scaled_length)
1318          } else if (overflow < desired * rc->param.max_overflow_degradation / -100){                   *         ratio = assymetric_total / symmetric_total */
1319                  desired += desired * rc->param.max_overflow_degradation / -100;                  rc->assymetric_tax_ratio = ((double)symetric_total - (double)assymetric_delta_total) / (double)symetric_total;
1320          } else {          } else {
1321                  desired += overflow;                  rc->assymetric_tax_ratio = 1.0f;
1322          }          }
1323    
1324          /* Make sure we are not higher than desired frame size */          DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- Assymetric tax ratio:%.2f\n", rc->assymetric_tax_ratio);
         if (desired > rc->max_length) {  
                 capped_to_max_framesize = 1;  
                 desired = rc->max_length;  
         }  
1325    
1326          /* Make sure to not scale below the minimum framesize */          /* Last bits that need to be reset */
1327          if (desired < rc->min_length[s->type-1])          rc->overflow = 0;
1328                  desired = rc->min_length[s->type-1];          rc->KFoverflow = 0;
1329            rc->KFoverflow_partial = 0;
1330            rc->KF_idx = 0;
1331            rc->desired_total = 0;
1332            rc->real_total = 0;
1333    
1334            /* Job done */
1335            return;
1336    }
1337    
1338    /*****************************************************************************
1339     * Still more low level stuff (nothing to do with stats treatment)
1340     ****************************************************************************/
1341    
1342    /* This function returns an allocated string containing a complete line read
1343     * from the file starting at the current position */
1344    static char *
1345    readline(FILE *f)
1346    {
1347            char *buffer = NULL;
1348            int buffer_size = 0;
1349            int pos = 0;
1350    
1351          /*          do {
1352           * Don't laugh at this very 'simple' quant<->filesize relationship, it                  int c;
          * proves to be acurate enough for our algorithm  
          */  
         data->quant= (s->quant * s->length) / desired;  
1353    
1354          /* Let's clip the computed quantizer, if needed */                  /* Read a character from the stream */
1355          if (data->quant < 1) {                  c = fgetc(f);
                 data->quant = 1;  
         } else if (data->quant > 31) {  
                 data->quant = 31;  
         } else if (s->type != XVID_TYPE_IVOP) {  
1356    
1357                  /*                  /* Is that EOF or new line ? */
1358                   * The frame quantizer has not been clipped, this appear to be a good                  if(c == EOF || c == '\n')
1359                   * computed quantizer, however past frames give us some info about how                          break;
                  * this quantizer performs against the algo prevision. Let's use this  
                  * prevision to increase the quantizer when we observe a too big  
                  * accumulated error  
                  */  
                 if (s->type== XVID_TYPE_BVOP) {  
                         rc->bquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant;  
1360    
1361                          if (rc->bquant_error[data->quant] >= 1.0) {                  /* Do we have to update buffer ? */
1362                                  rc->bquant_error[data->quant] -= 1.0;                  if(pos >= buffer_size - 1) {
1363                                  data->quant++;                          buffer_size += BUF_SZ;
1364                            buffer = (char*)realloc(buffer, buffer_size);
1365                            if (buffer == NULL)
1366                                    return(NULL);
1367                          }                          }
                 } else {  
                         rc->pquant_error[data->quant] += ((double)(s->quant * s->length) / desired) - data->quant;  
1368    
1369                          if (rc->pquant_error[data->quant] >= 1.0) {                  buffer[pos] = c;
1370                                  rc->pquant_error[data->quant] -= 1.0;                  pos++;
1371                                  ++data->quant;          } while(1);
                         }  
                 }  
         }  
1372    
1373          /*          /* Read \n or EOF */
1374           * Now we have a computed quant that is in the right quante range, with a          if (buffer == NULL) {
1375           * possible +1 correction due to cumulated error. We can now safely clip                  /* EOF, so we reached the end of the file, return NULL */
1376           * the quantizer again with user's quant ranges. "Safely" means the Rate                  if(feof(f))
1377           * Control could learn more about this quantizer, this knowledge is useful                          return(NULL);
1378           * for future frames even if it this quantizer won't be really used atm,  
1379           * that's why we don't perform this clipping earlier.                  /* Just an empty line with just a newline, allocate a 1 byte buffer to
1380           */                   * store a zero length string */
1381          if (data->quant < data->min_quant[s->type-1]) {                  buffer = (char*)malloc(1);
1382                  data->quant = data->min_quant[s->type-1];                  if(buffer == NULL)
1383          } else if (data->quant > data->max_quant[s->type-1]) {                          return(NULL);
                 data->quant = data->max_quant[s->type-1];  
1384          }          }
1385    
1386          /*          /* Zero terminated string */
1387           * To avoid big quality jumps from frame to frame, we apply a "security"          buffer[pos] = '\0';
          * rule that makes |last_quant - new_quant| <= 2. This rule only applies  
          * to predicted frames (P and B)  
          */  
         if (s->type != XVID_TYPE_IVOP && rc->last_quant[s->type-1] && capped_to_max_framesize == 0) {  
1388    
1389                  if (data->quant > rc->last_quant[s->type-1] + 2) {          return(buffer);
                         data->quant = rc->last_quant[s->type-1] + 2;  
                         DPRINTF(XVID_DEBUG_RC, "p/b-frame quantizer prevented from rising too steeply");  
1390                  }                  }
1391                  if (data->quant < rc->last_quant[s->type-1] - 2) {  
1392                          data->quant = rc->last_quant[s->type-1] - 2;  /* This function returns a pointer to the first non space char in the given
1393                          DPRINTF(XVID_DEBUG_RC, "p/b-frame quantizer prevented from falling too steeply");   * string */
1394    static char *
1395    skipspaces(char *string)
1396    {
1397            const char spaces[] =
1398                    {
1399                            ' ','\t','\0'
1400                    };
1401            const char *spacechar = spaces;
1402    
1403            if (string == NULL) return(NULL);
1404    
1405            while (*string != '\0') {
1406                    /* Test against space chars */
1407                    while (*spacechar != '\0') {
1408                            if (*string == *spacechar) {
1409                                    string++;
1410                                    spacechar = spaces;
1411                                    break;
1412                  }                  }
1413                            spacechar++;
1414          }          }
1415    
1416          /*                  /* No space char */
1417           * We don't want to pollute the RC history results when our computed quant                  if (*spacechar == '\0') return(string);
          * has been computed from a capped frame size  
          */  
         if (capped_to_max_framesize == 0) {  
                 rc->last_quant[s->type-1] = data->quant;  
1418          }          }
1419    
1420          return 0;          return(string);
1421  }  }
1422    
1423    /* This function returns a boolean that tells if the string is only a
1424     * comment */
1425  static int rc_2pass2_after(rc_2pass2_t * rc, xvid_plg_data_t * data)  static int
1426    iscomment(char *string)
1427  {  {
1428      stat_t * s = &rc->stats[data->frame_num];          const char comments[] =
1429                    {
1430          /* Insufficent stats data */                          '#',';', '%', '\0'
1431      if (data->frame_num >= rc->num_frames)                  };
1432          return 0;          const char *cmtchar = comments;
1433            int iscomment = 0;
1434      rc->quant_count[data->quant]++;  
1435            if (string == NULL) return(1);
1436      if (data->type == XVID_TYPE_IVOP) {  
1437          int kfdiff = (rc->keyframe_locations[rc->KF_idx] -      rc->keyframe_locations[rc->KF_idx - 1]);          string = skipspaces(string);
1438    
1439          rc->overflow += rc->KFoverflow;          while(*cmtchar != '\0') {
1440          rc->KFoverflow = s->desired_length - data->length;                  if(*string == *cmtchar) {
1441                            iscomment = 1;
1442          if (kfdiff > 1) {  // non-consecutive keyframes                          break;
             rc->KFoverflow_partial = rc->KFoverflow / (kfdiff - 1);  
         }else{ // consecutive keyframes  
                         rc->overflow += rc->KFoverflow;  
                         rc->KFoverflow = 0;  
                         rc->KFoverflow_partial = 0;  
1443          }          }
1444          rc->KF_idx++;                  cmtchar++;
     }else{  
         // distribute part of the keyframe overflow  
         rc->overflow += s->desired_length - data->length + rc->KFoverflow_partial;  
         rc->KFoverflow -= rc->KFoverflow_partial;  
1445      }      }
1446    
1447      DPRINTF(XVID_DEBUG_RC, "[%i] quant:%i stats1:%i scaled:%i actual:%i overflow:%i\n",          return(iscomment);
         data->frame_num,  
         data->quant,  
         s->length,  
         s->scaled_length,  
         data->length,  
         rc->overflow);  
   
     return(0);  
1448  }  }
1449    
1450    #if 0
1451    static void
1452  int xvid_plugin_2pass2(void * handle, int opt, void * param1, void * param2)  stats_print(rc_2pass2_t * rc)
 {  
     switch(opt)  
1453      {      {
1454      case XVID_PLG_INFO :          int i;
1455          return 0;          const char frame_type[4] = { 'i', 'p', 'b', 's'};
   
     case XVID_PLG_CREATE :  
         return rc_2pass2_create((xvid_plg_create_t*)param1, param2);  
   
     case XVID_PLG_DESTROY :  
         return rc_2pass2_destroy((rc_2pass2_t*)handle, (xvid_plg_destroy_t*)param1);  
   
     case XVID_PLG_BEFORE :  
         return rc_2pass2_before((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1);  
1456    
1457      case XVID_PLG_AFTER :          for (i=0; i<rc->num_frames; i++) {
1458          return rc_2pass2_after((rc_2pass2_t*)handle, (xvid_plg_data_t*)param1);                  twopass_stat_t *s = &rc->stats[i];
1459                    DPRINTF(XVID_DEBUG_RC, "[xvid rc] -- frame:%d type:%c quant:%d stats:%d scaled:%d desired:%d actual:%d overflow(%c):%.2f\n",
1460                                    i, frame_type[s->type-1], -1, s->length, s->scaled_length,
1461                                    s->desired_length, -1, frame_type[s->type-1], -1.0f);
1462      }      }
   
     return XVID_ERR_FAIL;  
1463  }  }
1464    #endif
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