git.sesse.net Git - vlc/blob - src/misc/stats.c

   1 /*****************************************************************************
   2  * stats.c: Statistics handling
   3  *****************************************************************************
   4  * Copyright (C) 2006 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Clément Stenac <zorglub@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <stdio.h>                                               /* required */
  34
  35 #include "input/input_internal.h"
  36
  37 /*****************************************************************************
  38  * Local prototypes
  39  *****************************************************************************/
  40 static int CounterUpdate( vlc_object_t *p_this,
  41                           counter_t *p_counter,
  42                           vlc_value_t val, vlc_value_t * );
  43 static void TimerDump( vlc_object_t *p_this, counter_t *p_counter, bool);
  44
  45 /*****************************************************************************
  46  * Exported functions
  47  *****************************************************************************/
  48
  49 /**
  50  * Create a statistics counter
  51  * \param p_this a VLC object
  52  * \param i_type the type of stored data. One of VLC_VAR_STRING,
  53  * VLC_VAR_INTEGER, VLC_VAR_FLOAT
  54  * \param i_compute_type the aggregation type. One of STATS_LAST (always
  55  * keep the last value), STATS_COUNTER (increment by the passed value),
  56  * STATS_MAX (keep the maximum passed value), STATS_MIN, or STATS_DERIVATIVE
  57  * (keep a time derivative of the value)
  58  */
  59 counter_t * __stats_CounterCreate( vlc_object_t *p_this,
  60                                    int i_type, int i_compute_type )
  61 {
  62     counter_t *p_counter = (counter_t*) malloc( sizeof( counter_t ) ) ;
  63     (void)p_this;
  64
  65     if( !p_counter ) return NULL;
  66     p_counter->i_compute_type = i_compute_type;
  67     p_counter->i_type = i_type;
  68     p_counter->i_samples = 0;
  69     p_counter->pp_samples = NULL;
  70     p_counter->psz_name = NULL;
  71
  72     p_counter->update_interval = 0;
  73     p_counter->last_update = 0;
  74
  75     return p_counter;
  76 }
  77
  78 /** Update a counter element with new values
  79  * \param p_this a VLC object
  80  * \param p_counter the counter to update
  81  * \param val the vlc_value union containing the new value to aggregate. For
  82  * more information on how data is aggregated, \see __stats_Create
  83  * \param val_new a pointer that will be filled with new data
  84  */
  85 int __stats_Update( vlc_object_t *p_this, counter_t *p_counter,
  86                     vlc_value_t val, vlc_value_t *val_new )
  87 {
  88     if( !libvlc_stats (p_this) || !p_counter ) return VLC_EGENERIC;
  89     return CounterUpdate( p_this, p_counter, val, val_new );
  90 }
  91
  92 /** Get the aggregated value for a counter
  93  * \param p_this an object
  94  * \param p_counter the counter
  95  * \param val a pointer to an initialized vlc_value union. It will contain the
  96  * retrieved value
  97  * \return an error code
  98  */
  99 int __stats_Get( vlc_object_t *p_this, counter_t *p_counter, vlc_value_t *val )
 100 {
 101     if( !libvlc_stats (p_this) || !p_counter || p_counter->i_samples == 0 )
 102     {
 103         val->i_int = val->f_float = 0.0;
 104         return VLC_EGENERIC;
 105     }
 106
 107     switch( p_counter->i_compute_type )
 108     {
 109     case STATS_LAST:
 110     case STATS_MIN:
 111     case STATS_MAX:
 112     case STATS_COUNTER:
 113         *val = p_counter->pp_samples[0]->value;
 114         break;
 115     case STATS_DERIVATIVE:
 116         /* Not ready yet */
 117         if( p_counter->i_samples < 2 )
 118         {
 119             val->i_int = 0; val->f_float = 0.0;
 120             return VLC_EGENERIC;
 121         }
 122         if( p_counter->i_type == VLC_VAR_INTEGER )
 123         {
 124             float f = ( p_counter->pp_samples[0]->value.i_int -
 125                         p_counter->pp_samples[1]->value.i_int ) /
 126                     (float)(  p_counter->pp_samples[0]->date -
 127                               p_counter->pp_samples[1]->date );
 128             val->i_int = (int)f;
 129         }
 130         else
 131         {
 132             float f = (float)( p_counter->pp_samples[0]->value.f_float -
 133                                p_counter->pp_samples[1]->value.f_float ) /
 134                       (float)( p_counter->pp_samples[0]->date -
 135                                p_counter->pp_samples[1]->date );
 136             val->f_float = f;
 137         }
 138         break;
 139     }
 140     return VLC_SUCCESS;;
 141 }
 142
 143 input_stats_t *stats_NewInputStats( input_thread_t *p_input )
 144 {
 145     (void)p_input;
 146     input_stats_t *p_stats = calloc( 1, sizeof(input_stats_t) );
 147     if( !p_stats )
 148         return NULL;
 149
 150     vlc_mutex_init( &p_stats->lock );
 151     stats_ReinitInputStats( p_stats );
 152
 153     return p_stats;
 154 }
 155
 156 void stats_ComputeInputStats( input_thread_t *p_input, input_stats_t *p_stats )
 157 {
 158     if( !libvlc_stats (p_input) ) return;
 159
 160     vlc_mutex_lock( &p_input->p->counters.counters_lock );
 161     vlc_mutex_lock( &p_stats->lock );
 162
 163     /* Input */
 164     stats_GetInteger( p_input, p_input->p->counters.p_read_packets,
 165                       &p_stats->i_read_packets );
 166     stats_GetInteger( p_input, p_input->p->counters.p_read_bytes,
 167                       &p_stats->i_read_bytes );
 168     stats_GetFloat( p_input, p_input->p->counters.p_input_bitrate,
 169                     &p_stats->f_input_bitrate );
 170     stats_GetInteger( p_input, p_input->p->counters.p_demux_read,
 171                       &p_stats->i_demux_read_bytes );
 172     stats_GetFloat( p_input, p_input->p->counters.p_demux_bitrate,
 173                     &p_stats->f_demux_bitrate );
 174
 175     /* Decoders */
 176     stats_GetInteger( p_input, p_input->p->counters.p_decoded_video,
 177                       &p_stats->i_decoded_video );
 178     stats_GetInteger( p_input, p_input->p->counters.p_decoded_audio,
 179                       &p_stats->i_decoded_audio );
 180
 181     /* Sout */
 182     if( p_input->p->counters.p_sout_send_bitrate )
 183     {
 184         stats_GetInteger( p_input, p_input->p->counters.p_sout_sent_packets,
 185                           &p_stats->i_sent_packets );
 186         stats_GetInteger( p_input, p_input->p->counters.p_sout_sent_bytes,
 187                           &p_stats->i_sent_bytes );
 188         stats_GetFloat  ( p_input, p_input->p->counters.p_sout_send_bitrate,
 189                           &p_stats->f_send_bitrate );
 190     }
 191
 192     /* Aout */
 193     stats_GetInteger( p_input, p_input->p->counters.p_played_abuffers,
 194                       &p_stats->i_played_abuffers );
 195     stats_GetInteger( p_input, p_input->p->counters.p_lost_abuffers,
 196                       &p_stats->i_lost_abuffers );
 197
 198     /* Vouts */
 199     stats_GetInteger( p_input, p_input->p->counters.p_displayed_pictures,
 200                       &p_stats->i_displayed_pictures );
 201     stats_GetInteger( p_input, p_input->p->counters.p_lost_pictures,
 202                       &p_stats->i_lost_pictures );
 203
 204     vlc_mutex_unlock( &p_stats->lock );
 205     vlc_mutex_unlock( &p_input->p->counters.counters_lock );
 206 }
 207
 208 void stats_ReinitInputStats( input_stats_t *p_stats )
 209 {
 210     vlc_mutex_lock( &p_stats->lock );
 211     p_stats->i_read_packets = p_stats->i_read_bytes =
 212     p_stats->f_input_bitrate = p_stats->f_average_input_bitrate =
 213     p_stats->i_demux_read_packets = p_stats->i_demux_read_bytes =
 214     p_stats->f_demux_bitrate = p_stats->f_average_demux_bitrate =
 215     p_stats->i_displayed_pictures = p_stats->i_lost_pictures =
 216     p_stats->i_played_abuffers = p_stats->i_lost_abuffers =
 217     p_stats->i_decoded_video = p_stats->i_decoded_audio =
 218     p_stats->i_sent_bytes = p_stats->i_sent_packets = p_stats->f_send_bitrate
 219      = 0;
 220     vlc_mutex_unlock( &p_stats->lock );
 221 }
 222
 223 void stats_DumpInputStats( input_stats_t *p_stats  )
 224 {
 225     vlc_mutex_lock( &p_stats->lock );
 226     /* f_bitrate is in bytes / microsecond
 227      * *1000 => bytes / millisecond => kbytes / seconds */
 228     fprintf( stderr, "Input : %i (%i bytes) - %f kB/s - "
 229                      "Demux : %i (%i bytes) - %f kB/s\n"
 230                      " - Vout : %i/%i - Aout : %i/%i - Sout : %f\n",
 231                     p_stats->i_read_packets, p_stats->i_read_bytes,
 232                     p_stats->f_input_bitrate * 1000,
 233                     p_stats->i_demux_read_packets, p_stats->i_demux_read_bytes,
 234                     p_stats->f_demux_bitrate * 1000,
 235                     p_stats->i_displayed_pictures, p_stats->i_lost_pictures,
 236                     p_stats->i_played_abuffers, p_stats->i_lost_abuffers,
 237                     p_stats->f_send_bitrate );
 238     vlc_mutex_unlock( &p_stats->lock );
 239 }
 240
 241 void __stats_ComputeGlobalStats( vlc_object_t *p_obj, global_stats_t *p_stats )
 242 {
 243     vlc_list_t *p_list;
 244     int i_index;
 245
 246     if( !libvlc_stats (p_obj) ) return;
 247
 248     vlc_mutex_lock( &p_stats->lock );
 249
 250     p_list = vlc_list_find( p_obj, VLC_OBJECT_INPUT, FIND_ANYWHERE );
 251     if( p_list )
 252     {
 253         float f_total_in = 0, f_total_out = 0,f_total_demux = 0;
 254         for( i_index = 0; i_index < p_list->i_count ; i_index ++ )
 255         {
 256             float f_in = 0, f_out = 0, f_demux = 0;
 257             input_thread_t *p_input = (input_thread_t *)
 258                              p_list->p_values[i_index].p_object;
 259             vlc_mutex_lock( &p_input->p->counters.counters_lock );
 260             stats_GetFloat( p_obj, p_input->p->counters.p_input_bitrate, &f_in );
 261             if( p_input->p->counters.p_sout_send_bitrate )
 262                 stats_GetFloat( p_obj, p_input->p->counters.p_sout_send_bitrate,
 263                                     &f_out );
 264             stats_GetFloat( p_obj, p_input->p->counters.p_demux_bitrate,
 265                                 &f_demux );
 266             vlc_mutex_unlock( &p_input->p->counters.counters_lock );
 267             f_total_in += f_in; f_total_out += f_out;f_total_demux += f_demux;
 268         }
 269         p_stats->f_input_bitrate = f_total_in;
 270         p_stats->f_output_bitrate = f_total_out;
 271         p_stats->f_demux_bitrate = f_total_demux;
 272         vlc_list_release( p_list );
 273     }
 274
 275     vlc_mutex_unlock( &p_stats->lock );
 276 }
 277
 278 void __stats_TimerStart( vlc_object_t *p_obj, const char *psz_name,
 279                          unsigned int i_id )
 280 {
 281     libvlc_priv_t *priv = libvlc_priv (p_obj->p_libvlc);
 282     counter_t *p_counter = NULL;
 283
 284     if( !priv->b_stats ) return;
 285
 286     vlc_mutex_lock( &priv->timer_lock );
 287
 288     for( int i = 0 ; i < priv->i_timers; i++ )
 289     {
 290         if( priv->pp_timers[i]->i_id == i_id
 291             && priv->pp_timers[i]->p_obj == p_obj )
 292         {
 293             p_counter = priv->pp_timers[i];
 294             break;
 295         }
 296     }
 297     if( !p_counter )
 298     {
 299         counter_sample_t *p_sample;
 300         p_counter = stats_CounterCreate( p_obj->p_libvlc, VLC_VAR_TIME,
 301                                          STATS_TIMER );
 302         if( !p_counter )
 303             goto out;
 304         p_counter->psz_name = strdup( psz_name );
 305         p_counter->i_id = i_id;
 306         p_counter->p_obj = p_obj;
 307         INSERT_ELEM( priv->pp_timers, priv->i_timers,
 308                      priv->i_timers, p_counter );
 309
 310         /* 1st sample : if started: start_date, else last_time, b_started */
 311         p_sample = (counter_sample_t *)malloc( sizeof( counter_sample_t ) );
 312         INSERT_ELEM( p_counter->pp_samples, p_counter->i_samples,
 313                      p_counter->i_samples, p_sample );
 314         p_sample->date = 0; p_sample->value.b_bool = 0;
 315         /* 2nd sample : global_time, i_samples */
 316         p_sample = (counter_sample_t *)malloc( sizeof( counter_sample_t ) );
 317         INSERT_ELEM( p_counter->pp_samples, p_counter->i_samples,
 318                      p_counter->i_samples, p_sample );
 319         p_sample->date = 0; p_sample->value.i_int = 0;
 320     }
 321     if( p_counter->pp_samples[0]->value.b_bool == true )
 322     {
 323         msg_Warn( p_obj, "timer '%s' was already started !", psz_name );
 324         goto out;
 325     }
 326     p_counter->pp_samples[0]->value.b_bool = true;
 327     p_counter->pp_samples[0]->date = mdate();
 328 out:
 329     vlc_mutex_unlock( &priv->timer_lock );
 330 }
 331
 332 void __stats_TimerStop( vlc_object_t *p_obj, unsigned int i_id )
 333 {
 334     counter_t *p_counter = NULL;
 335     libvlc_priv_t *priv = libvlc_priv (p_obj->p_libvlc);
 336
 337     if( !priv->b_stats ) return;
 338     vlc_mutex_lock( &priv->timer_lock );
 339     for( int i = 0 ; i < priv->i_timers; i++ )
 340     {
 341         if( priv->pp_timers[i]->i_id == i_id
 342             && priv->pp_timers[i]->p_obj == p_obj )
 343         {
 344             p_counter = priv->pp_timers[i];
 345             break;
 346         }
 347     }
 348     if( !p_counter || p_counter->i_samples != 2 )
 349     {
 350         msg_Err( p_obj, "timer does not exist" );
 351         goto out;
 352     }
 353     p_counter->pp_samples[0]->value.b_bool = false;
 354     p_counter->pp_samples[1]->value.i_int += 1;
 355     p_counter->pp_samples[0]->date = mdate() - p_counter->pp_samples[0]->date;
 356     p_counter->pp_samples[1]->date += p_counter->pp_samples[0]->date;
 357 out:
 358     vlc_mutex_unlock( &priv->timer_lock );
 359 }
 360
 361 void __stats_TimerDump( vlc_object_t *p_obj, unsigned int i_id )
 362 {
 363     counter_t *p_counter = NULL;
 364     libvlc_priv_t *priv = libvlc_priv (p_obj->p_libvlc);
 365
 366     if( !priv->b_stats ) return;
 367     vlc_mutex_lock( &priv->timer_lock );
 368     for( int i = 0 ; i < priv->i_timers; i++ )
 369     {
 370         if( priv->pp_timers[i]->i_id == i_id
 371             && priv->pp_timers[i]->p_obj == p_obj )
 372         {
 373             p_counter = priv->pp_timers[i];
 374             break;
 375         }
 376     }
 377     TimerDump( p_obj, p_counter, true );
 378     vlc_mutex_unlock( &priv->timer_lock );
 379 }
 380
 381 void __stats_TimersDumpAll( vlc_object_t *p_obj )
 382 {
 383     libvlc_priv_t *priv = libvlc_priv (p_obj->p_libvlc);
 384
 385     if( !priv->b_stats ) return;
 386     vlc_mutex_lock( &priv->timer_lock );
 387     for ( int i = 0 ; i < priv->i_timers ; i++ )
 388         TimerDump( p_obj, priv->pp_timers[i], false );
 389     vlc_mutex_unlock( &priv->timer_lock );
 390 }
 391
 392 void __stats_TimerClean( vlc_object_t *p_obj, unsigned int i_id )
 393 {
 394     libvlc_priv_t *priv = libvlc_priv (p_obj->p_libvlc);
 395
 396     vlc_mutex_lock( &priv->timer_lock );
 397     for ( int i = priv->i_timers -1 ; i >= 0; i-- )
 398     {
 399         counter_t *p_counter = priv->pp_timers[i];
 400         if( p_counter->i_id == i_id && p_counter->p_obj == p_obj )
 401         {
 402             REMOVE_ELEM( priv->pp_timers, priv->i_timers, i );
 403             stats_CounterClean( p_counter );
 404         }
 405     }
 406     vlc_mutex_unlock( &priv->timer_lock );
 407 }
 408
 409 void __stats_TimersCleanAll( vlc_object_t *p_obj )
 410 {
 411     libvlc_priv_t *priv = libvlc_priv (p_obj->p_libvlc);
 412
 413     vlc_mutex_lock( &priv->timer_lock );
 414     for ( int i = priv->i_timers -1 ; i >= 0; i-- )
 415     {
 416         counter_t *p_counter = priv->pp_timers[i];
 417         REMOVE_ELEM( priv->pp_timers, priv->i_timers, i );
 418         stats_CounterClean( p_counter );
 419     }
 420     vlc_mutex_unlock( &priv->timer_lock );
 421 }
 422
 423 void stats_CounterClean( counter_t *p_c )
 424 {
 425     if( p_c )
 426     {
 427         int i = p_c->i_samples - 1 ;
 428         while( i >= 0 )
 429         {
 430             counter_sample_t *p_s = p_c->pp_samples[i];
 431             REMOVE_ELEM( p_c->pp_samples, p_c->i_samples, i );
 432             free( p_s );
 433             i--;
 434         }
 435         free( p_c->psz_name );
 436         free( p_c );
 437     }
 438 }
 439
 440
 441 /********************************************************************
 442  * Following functions are local
 443  ********************************************************************/
 444
 445 /**
 446  * Update a statistics counter, according to its type
 447  * If needed, perform a bit of computation (derivative, mostly)
 448  * This function must be entered with stats handler lock
 449  * \param p_counter the counter to update
 450  * \param val the "new" value
 451  * \return an error code
 452  */
 453 static int CounterUpdate( vlc_object_t *p_handler,
 454                           counter_t *p_counter,
 455                           vlc_value_t val, vlc_value_t *new_val )
 456 {
 457     switch( p_counter->i_compute_type )
 458     {
 459     case STATS_LAST:
 460     case STATS_MIN:
 461     case STATS_MAX:
 462         if( p_counter->i_samples > 1)
 463         {
 464             msg_Err( p_handler, "LAST counter has several samples !" );
 465             return VLC_EGENERIC;
 466         }
 467         if( p_counter->i_type != VLC_VAR_FLOAT &&
 468             p_counter->i_type != VLC_VAR_INTEGER &&
 469             p_counter->i_compute_type != STATS_LAST )
 470         {
 471             msg_Err( p_handler, "unable to compute MIN or MAX for this type");
 472             return VLC_EGENERIC;
 473         }
 474
 475         if( p_counter->i_samples == 0 )
 476         {
 477             counter_sample_t *p_new = (counter_sample_t*)malloc(
 478                                                sizeof( counter_sample_t ) );
 479             p_new->value.psz_string = NULL;
 480
 481             INSERT_ELEM( p_counter->pp_samples, p_counter->i_samples,
 482                          p_counter->i_samples, p_new );
 483         }
 484         if( p_counter->i_samples == 1 )
 485         {
 486             /* Update if : LAST or (MAX and bigger) or (MIN and bigger) */
 487             if( p_counter->i_compute_type == STATS_LAST ||
 488                 ( p_counter->i_compute_type == STATS_MAX &&
 489                    ( ( p_counter->i_type == VLC_VAR_INTEGER &&
 490                        p_counter->pp_samples[0]->value.i_int > val.i_int ) ||
 491                      ( p_counter->i_type == VLC_VAR_FLOAT &&
 492                        p_counter->pp_samples[0]->value.f_float > val.f_float )
 493                    ) ) ||
 494                 ( p_counter->i_compute_type == STATS_MIN &&
 495                    ( ( p_counter->i_type == VLC_VAR_INTEGER &&
 496                        p_counter->pp_samples[0]->value.i_int < val.i_int ) ||
 497                      ( p_counter->i_type == VLC_VAR_FLOAT &&
 498                        p_counter->pp_samples[0]->value.f_float < val.f_float )
 499                    ) ) )
 500             {
 501                 if( p_counter->i_type == VLC_VAR_STRING &&
 502                     p_counter->pp_samples[0]->value.psz_string )
 503                 {
 504                     free( p_counter->pp_samples[0]->value.psz_string );
 505                 }
 506                 p_counter->pp_samples[0]->value = val;
 507                 *new_val = p_counter->pp_samples[0]->value;
 508             }
 509         }
 510         break;
 511     case STATS_DERIVATIVE:
 512     {
 513         counter_sample_t *p_new, *p_old;
 514         mtime_t now = mdate();
 515         if( now - p_counter->last_update < p_counter->update_interval )
 516         {
 517             return VLC_EGENERIC;
 518         }
 519         p_counter->last_update = now;
 520         if( p_counter->i_type != VLC_VAR_FLOAT &&
 521             p_counter->i_type != VLC_VAR_INTEGER )
 522         {
 523             msg_Err( p_handler, "Unable to compute DERIVATIVE for this type");
 524             return VLC_EGENERIC;
 525         }
 526         /* Insert the new one at the beginning */
 527         p_new = (counter_sample_t*)malloc( sizeof( counter_sample_t ) );
 528         p_new->value = val;
 529         p_new->date = p_counter->last_update;
 530         INSERT_ELEM( p_counter->pp_samples, p_counter->i_samples,
 531                      0, p_new );
 532
 533         if( p_counter->i_samples == 3 )
 534         {
 535             p_old = p_counter->pp_samples[2];
 536             REMOVE_ELEM( p_counter->pp_samples, p_counter->i_samples, 2 );
 537             free( p_old );
 538         }
 539         break;
 540     }
 541     case STATS_COUNTER:
 542         if( p_counter->i_samples > 1)
 543         {
 544             msg_Err( p_handler, "LAST counter has several samples !" );
 545             return VLC_EGENERIC;
 546         }
 547         if( p_counter->i_samples == 0 )
 548         {
 549             counter_sample_t *p_new = (counter_sample_t*)malloc(
 550                                                sizeof( counter_sample_t ) );
 551             p_new->value.psz_string = NULL;
 552
 553             INSERT_ELEM( p_counter->pp_samples, p_counter->i_samples,
 554                          p_counter->i_samples, p_new );
 555         }
 556         if( p_counter->i_samples == 1 )
 557         {
 558             switch( p_counter->i_type )
 559             {
 560             case VLC_VAR_INTEGER:
 561                 p_counter->pp_samples[0]->value.i_int += val.i_int;
 562                 if( new_val )
 563                     new_val->i_int = p_counter->pp_samples[0]->value.i_int;
 564                 break;
 565             case VLC_VAR_FLOAT:
 566                 p_counter->pp_samples[0]->value.f_float += val.f_float;
 567                 if( new_val )
 568                     new_val->f_float = p_counter->pp_samples[0]->value.f_float;
 569             default:
 570                 msg_Err( p_handler, "Trying to increment invalid variable %s",
 571                          p_counter->psz_name );
 572                 return VLC_EGENERIC;
 573             }
 574         }
 575         break;
 576     }
 577     return VLC_SUCCESS;
 578 }
 579
 580 static void TimerDump( vlc_object_t *p_obj, counter_t *p_counter,
 581                        bool b_total )
 582 {
 583     if( !p_counter )
 584         return;
 585
 586     mtime_t last, total;
 587     int i_total;
 588     if( p_counter->i_samples != 2 )
 589     {
 590         msg_Err( p_obj, "timer %s does not exist", p_counter->psz_name );
 591         return;
 592     }
 593     i_total = p_counter->pp_samples[1]->value.i_int;
 594     total = p_counter->pp_samples[1]->date;
 595     if( p_counter->pp_samples[0]->value.b_bool == true )
 596     {
 597         last = mdate() - p_counter->pp_samples[0]->date;
 598         i_total += 1;
 599         total += last;
 600     }
 601     else
 602     {
 603         last = p_counter->pp_samples[0]->date;
 604     }
 605     if( b_total )
 606     {
 607         msg_Dbg( p_obj,
 608              "TIMER %s : %.3f ms - Total %.3f ms / %i intvls (Avg %.3f ms)",
 609              p_counter->psz_name, (float)last/1000, (float)total/1000, i_total,
 610              (float)(total)/(1000*(float)i_total ) );
 611     }
 612     else
 613     {
 614         msg_Dbg( p_obj,
 615              "TIMER %s : Total %.3f ms / %i intvls (Avg %.3f ms)",
 616              p_counter->psz_name, (float)total/1000, i_total,
 617              (float)(total)/(1000*(float)i_total ) );
 618     }
 619 }