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revision 938, Sun Mar 23 04:03:01 2003 UTC revision 1286, Sat Dec 20 15:30:03 2003 UTC
# Line 3  Line 3 
3   * XviD Bit Rate Controller Library   * XviD Bit Rate Controller Library
4   * - VBR 2 pass bitrate controler implementation -   * - VBR 2 pass bitrate controler implementation -
5   *   *
6   * Copyright (C) 2002 Edouard Gomez <ed.gomez@wanadoo.fr>   *  Copyright (C) 2002-2003 Edouard Gomez <ed.gomez@free.fr>
7   *   *
8   * The curve treatment algorithm is the one implemented by Foxer <email?> and   * The curve treatment algorithm is the one implemented by Foxer <email?> and
9   * Dirk Knop <dknop@gwdg.de> for the XviD vfw dynamic library.   * Dirk Knop <dknop@gwdg.de> for the XviD vfw dynamic library.
# Line 22  Line 22 
22   * along with this program; if not, write to the Free Software   * along with this program; if not, write to the Free Software
23   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
24   *   *
25   * $Id: plugin_2pass1.c,v 1.1.2.1 2003-03-23 04:03:01 suxen_drol Exp $   * $Id: plugin_2pass1.c,v 1.1.2.12 2003-12-20 15:30:03 edgomez Exp $
26   *   *
27   *****************************************************************************/   *****************************************************************************/
28    
29  #include <stdio.h>  #include <stdio.h>
30    #include <errno.h> /* errno var (or function with recent libc) */
31    #include <string.h> /* strerror() */
32    
33  #include "../xvid.h"  #include "../xvid.h"
34  #include "../image/image.h"  #include "../image/image.h"
# Line 36  Line 38 
38  typedef struct  typedef struct
39  {  {
40          FILE * stat_file;          FILE * stat_file;
41    
42        double fq_error;
43  } rc_2pass1_t;  } rc_2pass1_t;
44    
45    
# Line 46  Line 50 
50          rc_2pass1_t * rc;          rc_2pass1_t * rc;
51    
52      /* check filename */      /* check filename */
53      if (param->filename == NULL || param->filename[0] == '\0')      if ((param->filename == NULL) ||
54                    (param->filename != NULL && param->filename[0] == '\0'))
55          return XVID_ERR_FAIL;          return XVID_ERR_FAIL;
56    
57      /* allocate context struct */      /* allocate context struct */
# Line 57  Line 62 
62      rc->stat_file = NULL;      rc->stat_file = NULL;
63    
64          /* Open the 1st pass file */          /* Open the 1st pass file */
65          if((rc->stat_file = fopen(param->filename, "w+")) == NULL)          if((rc->stat_file = fopen(param->filename, "w+b")) == NULL)
66                  return(XVID_ERR_FAIL);                  return(XVID_ERR_FAIL);
67    
68            /* I swear xvidcore isn't buggy, but when using mencoder+xvid4 i observe
69             * this weird bug.
70             *
71             * Symptoms: The stats file grows until it's fclosed, but at this moment
72             *           a large part of the file is filled by 0x00 bytes w/o any
73             *           reasonable cause. The stats file is then completly unusable
74             *
75             * So far, i think i found "the why":
76             *  - take a MPEG stream containing 2 sequences (concatenate 2 MPEG files
77             *    together)
78             *  - Encode this MPEG file
79             *
80             * It should trigger the bug
81             *
82             * I think this is caused by some kind of race condition on mencoder module
83             * start/stop.
84             *  - mencoder encodes the first sequence
85             *    + xvid4 module opens xvid-twopass.stats and writes stats in it.
86             *  - mencoder detects the second sequence and initialize a second
87             *    module and stops the old encoder
88             *    + new xvid4 module opens a new xvid-twopass.stats, old xvid4
89             *      module closes it
90             *
91             * This is IT, got a racing condition.
92             * Unbuffered IO, may help ... */
93            setbuf(rc->stat_file, NULL);
94    
95          /*          /*
96           * The File Header           * The File Header
97           */           */
98          /* fprintf(rc->stat_file, "# XviD 2pass stat file\n");          fprintf(rc->stat_file, "# XviD 2pass stat file (core version %d.%d.%d)\n",
99      fprintf(rc->stat_file, "version %i.%i.%i\n",XVID_MAJOR(XVID_VERSION), XVID_MINOR(XVID_VERSION), XVID_PATCH(XVID_VERSION));                          XVID_VERSION_MAJOR(XVID_VERSION),
100          fprintf(rc->stat_file, "start\n");                          XVID_VERSION_MINOR(XVID_VERSION),
101      fprintf(rc->stat_file, "type quantizer length kblocks mblocks ublocks\n");  */                          XVID_VERSION_PATCH(XVID_VERSION));
102            fprintf(rc->stat_file, "# Please do not modify this file\n\n");
103    
104        rc->fq_error = 0;
105    
106      *handle = rc;      *handle = rc;
107          return(0);          return(0);
# Line 75  Line 110 
110    
111  static int rc_2pass1_destroy(rc_2pass1_t * rc, xvid_plg_destroy_t * destroy)  static int rc_2pass1_destroy(rc_2pass1_t * rc, xvid_plg_destroy_t * destroy)
112  {  {
113      //fprintf(rc->stat_file, "stop\n");          if (rc->stat_file) {
114          fclose(rc->stat_file);                  if (fclose(rc->stat_file) == EOF) {
115                            DPRINTF(XVID_DEBUG_RC, "Error closing stats file (%s)", strerror(errno));
116          free(rc);                  }
117            }
118            rc->stat_file = NULL; /* Just a paranoid reset */
119            free(rc); /* as the container structure is freed anyway */
120          return(0);          return(0);
121  }  }
122    
123    
124  static int rc_2pass1_before(rc_2pass1_t * rc, xvid_plg_data_t * data)  static int rc_2pass1_before(rc_2pass1_t * rc, xvid_plg_data_t * data)
125  {  {
126             if (data->quant <= 0) {
127                    if (data->zone && data->zone->mode == XVID_ZONE_QUANT) {
128                            rc->fq_error += (double)data->zone->increment / (double)data->zone->base;
129                            data->quant = (int)rc->fq_error;
130                            rc->fq_error -= data->quant;
131                    } else {
132      data->quant = 2;      data->quant = 2;
133      data->type = XVID_TYPE_AUTO;                  }
134      return 0;          }
135             return(0);
136  }  }
137    
138    
139  static int rc_2pass1_after(rc_2pass1_t * rc, xvid_plg_data_t * data)  static int rc_2pass1_after(rc_2pass1_t * rc, xvid_plg_data_t * data)
140  {  {
141          char type;          char type;
142            xvid_enc_stats_t *stats = &data->stats;
143    
144          /* Frame type in ascii I/P/B */          /* Frame type in ascii I/P/B */
145          switch(data->type) {          switch(stats->type) {
146          case XVID_TYPE_IVOP:          case XVID_TYPE_IVOP:
147                  type = 'i';                  type = 'i';
148                  break;                  break;
# Line 115  Line 161 
161    
162          /* write the resulting statistics */          /* write the resulting statistics */
163    
164          fprintf(rc->stat_file, "%c %d %d %d %d %d\n",          fprintf(rc->stat_file, "%c %d %d %d %d %d %d\n",
165          type,          type,
166                  data->quant,                          stats->quant,
167          data->length,                          stats->kblks,
168                  data->kblks,                          stats->mblks,
169          data->mblks,                          stats->ublks,
170          data->ublks);                          stats->length,
171                            stats->hlength);
172    
173          return(0);          return(0);
174  }  }
# Line 133  Line 180 
180      switch(opt)      switch(opt)
181      {      {
182      case XVID_PLG_INFO :      case XVID_PLG_INFO :
183            case XVID_PLG_FRAME :
184          return 0;          return 0;
185    
186      case XVID_PLG_CREATE :      case XVID_PLG_CREATE :
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