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 #include <stdio.h>                                               /* required */
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc/input.h>
  31
  32 /*****************************************************************************
  33  * Local prototypes
  34  *****************************************************************************/
  35 static counter_t *GetCounter( stats_handler_t *p_handler, int i_object_id,
  36                               unsigned int i_counter );
  37 static int stats_CounterUpdate( stats_handler_t *p_handler,
  38                                 counter_t *p_counter,
  39                                 vlc_value_t val, vlc_value_t * );
  40 static stats_handler_t* stats_HandlerCreate( vlc_object_t *p_this );
  41 static stats_handler_t *stats_HandlerGet( vlc_object_t *p_this );
  42
  43 static void TimerDump( vlc_object_t *p_this, counter_t *p_counter, vlc_bool_t);
  44
  45 /*****************************************************************************
  46  * Exported functions
  47  *****************************************************************************/
  48
  49 /**
  50  * Cleanup statistics handler stuff
  51  * \param p_stats the handler to clean
  52  * \return nothing
  53  */
  54 void stats_HandlerDestroy( stats_handler_t *p_stats )
  55 {
  56     int i;
  57     for ( i =  p_stats->i_counters - 1 ; i >= 0 ; i-- )
  58     {
  59         int j;
  60         counter_t *p_counter = p_stats->pp_counters[i];
  61
  62         for( j = p_counter->i_samples -1; j >= 0 ; j-- )
  63         {
  64             counter_sample_t *p_sample = p_counter->pp_samples[j];
  65             REMOVE_ELEM( p_counter->pp_samples, p_counter->i_samples, j );
  66             free( p_sample );
  67         }
  68         free( p_counter->psz_name );
  69         REMOVE_ELEM( p_stats->pp_counters, p_stats->i_counters, i );
  70         free( p_counter );
  71     }
  72 }
  73
  74 /**
  75  * Create a statistics counter
  76  * \param p_this the object for which to create the counter
  77  * \param psz_name the name
  78  * \param i_type the type of stored data. One of VLC_VAR_STRING,
  79  * VLC_VAR_INTEGER, VLC_VAR_FLOAT
  80  * \param i_compute_type the aggregation type. One of STATS_LAST (always
  81  * keep the last value), STATS_COUNTER (increment by the passed value),
  82  * STATS_MAX (keep the maximum passed value), STATS_MIN, or STATS_DERIVATIVE
  83  * (keep a time derivative of the value)
  84  */
  85 int __stats_Create( vlc_object_t *p_this, const char *psz_name, unsigned int i_id,
  86                     int i_type, int i_compute_type )
  87 {
  88     counter_t *p_counter;
  89     stats_handler_t *p_handler;
  90
  91     if( !p_this->p_libvlc->b_stats ) return VLC_EGENERIC;
  92
  93     p_handler = stats_HandlerGet( p_this );
  94     if( !p_handler ) return VLC_ENOMEM;
  95
  96     vlc_mutex_lock( &p_handler->object_lock );
  97
  98     p_counter = (counter_t*) malloc( sizeof( counter_t ) ) ;
  99
 100     p_counter->psz_name = strdup( psz_name );
 101     p_counter->i_index = ((uint64_t)p_this->i_object_id << 32 ) + i_id;
 102     p_counter->i_compute_type = i_compute_type;
 103     p_counter->i_type = i_type;
 104     p_counter->i_samples = 0;
 105     p_counter->pp_samples = NULL;
 106
 107     p_counter->update_interval = 0;
 108     p_counter->last_update = 0;
 109
 110     INSERT_ELEM( p_handler->pp_counters, p_handler->i_counters,
 111                  p_handler->i_counters, p_counter );
 112
 113     vlc_mutex_unlock( &p_handler->object_lock );
 114     vlc_object_release( p_handler );
 115
 116     return VLC_SUCCESS;
 117 }
 118
 119 /** Update a counter element with new values
 120  * \param p_this the object in which to update
 121  * \param psz_name the name
 122  * \param val the vlc_value union containing the new value to aggregate. For
 123  * more information on how data is aggregated, \see __stats_Create
 124  */
 125 int __stats_Update( vlc_object_t *p_this, unsigned int i_counter,
 126                     vlc_value_t val, vlc_value_t *val_new )
 127 {
 128     int i_ret;
 129     counter_t *p_counter;
 130     stats_handler_t *p_handler;
 131
 132     if( !p_this->p_libvlc->b_stats ) return VLC_EGENERIC;
 133
 134     /* Get stats handler singleton */
 135     p_handler = stats_HandlerGet( p_this );
 136     if( !p_handler ) return VLC_ENOMEM;
 137
 138     vlc_mutex_lock( &p_handler->object_lock );
 139     /* Look for existing element */
 140     p_counter = GetCounter( p_handler, p_this->i_object_id, i_counter );
 141     if( !p_counter )
 142     {
 143         vlc_mutex_unlock( &p_handler->object_lock );
 144         vlc_object_release( p_handler );
 145         return VLC_ENOOBJ;
 146     }
 147
 148     i_ret = stats_CounterUpdate( p_handler, p_counter, val, val_new );
 149     vlc_mutex_unlock( &p_handler->object_lock );
 150     vlc_object_release( p_handler );
 151
 152     return i_ret;
 153 }
 154
 155 /** Get the aggregated value for a counter
 156  * \param p_this an object
 157  * \param i_object_id the object id from which we want the data
 158  * \param psz_name the name of the couner
 159  * \param val a pointer to an initialized vlc_value union. It will contain the
 160  * retrieved value
 161  * \return an error code
 162  */
 163 int __stats_Get( vlc_object_t *p_this, int i_object_id,
 164                  unsigned int i_counter, vlc_value_t *val )
 165 {
 166     counter_t *p_counter;
 167     stats_handler_t *p_handler;
 168
 169     if( !p_this->p_libvlc->b_stats ) return VLC_EGENERIC;
 170
 171     /* Get stats handler singleton */
 172     p_handler = stats_HandlerGet( p_this );
 173     if( !p_handler ) return VLC_ENOMEM;
 174     vlc_mutex_lock( &p_handler->object_lock );
 175
 176     /* Look for existing element */
 177     p_counter = GetCounter( p_handler, i_object_id, i_counter );
 178     if( !p_counter )
 179     {
 180         vlc_mutex_unlock( &p_handler->object_lock );
 181         vlc_object_release( p_handler );
 182         val->i_int = val->f_float = 0.0;
 183         return VLC_ENOOBJ;
 184     }
 185
 186     if( p_counter->i_samples == 0 )
 187     {
 188         vlc_mutex_unlock( &p_handler->object_lock );
 189         vlc_object_release( p_handler );
 190         val->i_int = val->f_float = 0.0;
 191         return VLC_EGENERIC;
 192     }
 193
 194     switch( p_counter->i_compute_type )
 195     {
 196     case STATS_LAST:
 197     case STATS_MIN:
 198     case STATS_MAX:
 199     case STATS_COUNTER:
 200         *val = p_counter->pp_samples[0]->value;
 201         break;
 202     case STATS_DERIVATIVE:
 203         /* Not ready yet */
 204         if( p_counter->i_samples < 2 )
 205         {
 206             vlc_mutex_unlock( &p_handler->object_lock );
 207             vlc_object_release( p_handler );
 208             val->i_int = 0; val->f_float = 0.0;
 209             return VLC_EGENERIC;
 210         }
 211         if( p_counter->i_type == VLC_VAR_INTEGER )
 212         {
 213             float f = ( p_counter->pp_samples[0]->value.i_int -
 214                         p_counter->pp_samples[1]->value.i_int ) /
 215                     (float)(  p_counter->pp_samples[0]->date -
 216                               p_counter->pp_samples[1]->date );
 217             val->i_int = (int)f;
 218         }
 219         else
 220         {
 221             float f = (float)( p_counter->pp_samples[0]->value.f_float -
 222                                p_counter->pp_samples[1]->value.f_float ) /
 223                       (float)( p_counter->pp_samples[0]->date -
 224                                p_counter->pp_samples[1]->date );
 225             val->f_float = f;
 226         }
 227         break;
 228     }
 229     vlc_object_release( p_handler );
 230
 231     vlc_mutex_unlock( &p_handler->object_lock );
 232     return VLC_SUCCESS;;
 233 }
 234
 235 /** Get a statistics counter structure. This allows for low-level modifications
 236  * \param p_this a parent object
 237  * \param i_object_id the object from which to retrieve data
 238  * \param psz_name the name
 239  * \return the counter, or NULL if not found (or handler not created yet)
 240  */
 241 counter_t *__stats_CounterGet( vlc_object_t *p_this, int i_object_id,
 242                                unsigned int i_counter )
 243 {
 244     counter_t *p_counter;
 245     stats_handler_t *p_handler;
 246
 247     if( !p_this->p_libvlc->b_stats ) return NULL;
 248
 249     p_handler = stats_HandlerGet( p_this );
 250     if( !p_handler ) return NULL;
 251
 252     vlc_mutex_lock( &p_handler->object_lock );
 253
 254     /* Look for existing element */
 255     p_counter = GetCounter( p_handler, i_object_id, i_counter );
 256     vlc_mutex_unlock( &p_handler->object_lock );
 257     vlc_object_release( p_handler );
 258
 259     return p_counter;
 260 }
 261
 262
 263 void stats_ComputeInputStats( input_thread_t *p_input, input_stats_t *p_stats )
 264 {
 265     vlc_object_t *p_obj;
 266     vlc_list_t *p_list;
 267     int i_index;
 268
 269     if( !p_input->p_libvlc->b_stats ) return;
 270
 271     vlc_mutex_lock( &p_stats->lock );
 272
 273     /* Input */
 274     stats_GetInteger( p_input, p_input->i_object_id, STATS_READ_PACKETS,
 275                        &p_stats->i_read_packets );
 276     stats_GetInteger( p_input, p_input->i_object_id, STATS_READ_BYTES,
 277                        &p_stats->i_read_bytes );
 278     stats_GetFloat( p_input, p_input->i_object_id, STATS_INPUT_BITRATE,
 279                        &p_stats->f_input_bitrate );
 280
 281     stats_GetInteger( p_input, p_input->i_object_id, STATS_DEMUX_READ,
 282                       &p_stats->i_demux_read_bytes );
 283     stats_GetFloat( p_input, p_input->i_object_id, STATS_DEMUX_BITRATE,
 284                       &p_stats->f_demux_bitrate );
 285
 286     stats_GetInteger( p_input, p_input->i_object_id, STATS_DECODED_VIDEO,
 287                       &p_stats->i_decoded_video );
 288     stats_GetInteger( p_input, p_input->i_object_id, STATS_DECODED_AUDIO,
 289                       &p_stats->i_decoded_audio );
 290
 291     /* Sout */
 292     stats_GetInteger( p_input, p_input->i_object_id, STATS_SOUT_SENT_PACKETS,
 293                       &p_stats->i_sent_packets );
 294     stats_GetInteger( p_input, p_input->i_object_id, STATS_SOUT_SENT_BYTES,
 295                       &p_stats->i_sent_bytes );
 296     stats_GetFloat  ( p_input, p_input->i_object_id, STATS_SOUT_SEND_BITRATE,
 297                       &p_stats->f_send_bitrate );
 298
 299     /* Aout - We store in p_input because aout is shared */
 300     stats_GetInteger( p_input, p_input->i_object_id, STATS_PLAYED_ABUFFERS,
 301                       &p_stats->i_played_abuffers );
 302     stats_GetInteger( p_input, p_input->i_object_id, STATS_LOST_ABUFFERS,
 303                       &p_stats->i_lost_abuffers );
 304
 305     /* Vouts - FIXME: Store all in input */
 306     p_list = vlc_list_find( p_input, VLC_OBJECT_VOUT, FIND_CHILD );
 307     if( p_list )
 308     {
 309         p_stats->i_displayed_pictures  = 0 ;
 310         p_stats->i_lost_pictures = 0;
 311         for( i_index = 0; i_index < p_list->i_count ; i_index ++ )
 312         {
 313             int i_displayed = 0, i_lost = 0;
 314             p_obj = (vlc_object_t *)p_list->p_values[i_index].p_object;
 315             stats_GetInteger( p_obj, p_obj->i_object_id,
 316                               STATS_DISPLAYED_PICTURES,
 317                               &i_displayed );
 318             stats_GetInteger( p_obj, p_obj->i_object_id, STATS_LOST_PICTURES,
 319                               &i_lost );
 320             p_stats->i_displayed_pictures += i_displayed;
 321             p_stats->i_lost_pictures += i_lost;
 322          }
 323         vlc_list_release( p_list );
 324     }
 325
 326     vlc_mutex_unlock( &p_stats->lock );
 327 }
 328
 329
 330 void stats_ReinitInputStats( input_stats_t *p_stats )
 331 {
 332     p_stats->i_read_packets = p_stats->i_read_bytes =
 333     p_stats->f_input_bitrate = p_stats->f_average_input_bitrate =
 334     p_stats->i_demux_read_packets = p_stats->i_demux_read_bytes =
 335     p_stats->f_demux_bitrate = p_stats->f_average_demux_bitrate =
 336     p_stats->i_displayed_pictures = p_stats->i_lost_pictures =
 337     p_stats->i_played_abuffers = p_stats->i_lost_abuffers =
 338     p_stats->i_decoded_video = p_stats->i_decoded_audio =
 339     p_stats->i_sent_bytes = p_stats->i_sent_packets = p_stats->f_send_bitrate
 340      = 0;
 341 }
 342
 343 void stats_DumpInputStats( input_stats_t *p_stats  )
 344 {
 345     vlc_mutex_lock( &p_stats->lock );
 346     /* f_bitrate is in bytes / microsecond
 347      * *1000 => bytes / millisecond => kbytes / seconds */
 348     fprintf( stderr, "Input : %i (%i bytes) - %f kB/s - "
 349                      "Demux : %i (%i bytes) - %f kB/s\n"
 350                      " - Vout : %i/%i - Aout : %i/%i - Sout : %f\n",
 351                     p_stats->i_read_packets, p_stats->i_read_bytes,
 352                     p_stats->f_input_bitrate * 1000,
 353                     p_stats->i_demux_read_packets, p_stats->i_demux_read_bytes,
 354                     p_stats->f_demux_bitrate * 1000,
 355                     p_stats->i_displayed_pictures, p_stats->i_lost_pictures,
 356                     p_stats->i_played_abuffers, p_stats->i_lost_abuffers,
 357                     p_stats->f_send_bitrate );
 358     vlc_mutex_unlock( &p_stats->lock );
 359 }
 360
 361 void __stats_ComputeGlobalStats( vlc_object_t *p_obj, global_stats_t *p_stats )
 362 {
 363     vlc_list_t *p_list;
 364     int i_index;
 365
 366     if( !p_obj->p_libvlc->b_stats ) return;
 367
 368     vlc_mutex_lock( &p_stats->lock );
 369
 370     p_list = vlc_list_find( p_obj, VLC_OBJECT_INPUT, FIND_ANYWHERE );
 371     if( p_list )
 372     {
 373         float f_total_in = 0, f_total_out = 0,f_total_demux = 0;
 374         for( i_index = 0; i_index < p_list->i_count ; i_index ++ )
 375         {
 376             float f_in = 0, f_out = 0, f_demux = 0;
 377             p_obj = (vlc_object_t *)p_list->p_values[i_index].p_object;
 378             stats_GetFloat( p_obj, p_obj->i_object_id, STATS_INPUT_BITRATE,
 379                             &f_in );
 380             stats_GetFloat( p_obj, p_obj->i_object_id, STATS_SOUT_SEND_BITRATE,
 381                             &f_out );
 382             stats_GetFloat( p_obj, p_obj->i_object_id, STATS_DEMUX_BITRATE,
 383                             &f_demux );
 384             f_total_in += f_in; f_total_out += f_out;f_total_demux += f_demux;
 385         }
 386         p_stats->f_input_bitrate = f_total_in;
 387         p_stats->f_output_bitrate = f_total_out;
 388         p_stats->f_demux_bitrate = f_total_demux;
 389         vlc_list_release( p_list );
 390     }
 391
 392     vlc_mutex_unlock( &p_stats->lock );
 393 }
 394
 395 void stats_ReinitGlobalStats( global_stats_t *p_stats )
 396 {
 397     p_stats->f_input_bitrate = p_stats->f_output_bitrate = 0.0;
 398 }
 399
 400
 401 void __stats_TimerStart( vlc_object_t *p_obj, const char *psz_name,
 402                          unsigned int i_id )
 403 {
 404     counter_t *p_counter;
 405
 406     if( !p_obj->p_libvlc->b_stats ) return;
 407
 408     p_counter = stats_CounterGet( p_obj, p_obj->p_vlc->i_object_id, i_id );
 409     if( !p_counter )
 410     {
 411         counter_sample_t *p_sample;
 412         stats_Create( p_obj->p_vlc, psz_name, i_id, VLC_VAR_TIME, STATS_TIMER );
 413         p_counter = stats_CounterGet( p_obj,  p_obj->p_vlc->i_object_id,
 414                                       i_id );
 415         if( !p_counter ) return;
 416         /* 1st sample : if started: start_date, else last_time, b_started */
 417         p_sample = (counter_sample_t *)malloc( sizeof( counter_sample_t ) );
 418         INSERT_ELEM( p_counter->pp_samples, p_counter->i_samples,
 419                      p_counter->i_samples, p_sample );
 420         p_sample->date = 0; p_sample->value.b_bool = 0;
 421         /* 2nd sample : global_time, i_samples */
 422         p_sample = (counter_sample_t *)malloc( sizeof( counter_sample_t ) );
 423         INSERT_ELEM( p_counter->pp_samples, p_counter->i_samples,
 424                      p_counter->i_samples, p_sample );
 425         p_sample->date = 0; p_sample->value.i_int = 0;
 426     }
 427     if( p_counter->pp_samples[0]->value.b_bool == VLC_TRUE )
 428     {
 429         msg_Warn( p_obj, "timer %s was already started !", psz_name );
 430         return;
 431     }
 432     p_counter->pp_samples[0]->value.b_bool = VLC_TRUE;
 433     p_counter->pp_samples[0]->date = mdate();
 434 }
 435
 436 void __stats_TimerStop( vlc_object_t *p_obj, unsigned int i_id )
 437 {
 438     counter_t *p_counter;
 439
 440     if( !p_obj->p_libvlc->b_stats ) return;
 441
 442     p_counter = stats_CounterGet( p_obj, p_obj->p_vlc->i_object_id, i_id );
 443     if( !p_counter || p_counter->i_samples != 2 )
 444     {
 445         msg_Err( p_obj, "Timer does not exist" );
 446         return;
 447     }
 448     p_counter->pp_samples[0]->value.b_bool = VLC_FALSE;
 449     p_counter->pp_samples[1]->value.i_int += 1;
 450     p_counter->pp_samples[0]->date = mdate() - p_counter->pp_samples[0]->date;
 451     p_counter->pp_samples[1]->date += p_counter->pp_samples[0]->date;
 452 }
 453
 454 void __stats_TimerDump( vlc_object_t *p_obj, unsigned int i_id )
 455 {
 456     counter_t *p_counter;
 457
 458     if( !p_obj->p_libvlc->b_stats ) return;
 459
 460     p_counter = stats_CounterGet( p_obj, p_obj->p_vlc->i_object_id, i_id );
 461     TimerDump( p_obj, p_counter, VLC_TRUE );
 462 }
 463
 464
 465 void __stats_TimersDumpAll( vlc_object_t *p_obj )
 466 {
 467     int i;
 468     stats_handler_t *p_handler = stats_HandlerGet( p_obj );
 469     if( !p_handler ) return;
 470
 471     vlc_mutex_lock( &p_handler->object_lock );
 472     for ( i = 0 ; i< p_handler->i_counters; i++ )
 473     {
 474         counter_t * p_counter = p_handler->pp_counters[i];
 475         if( p_counter->i_compute_type == STATS_TIMER )
 476         {
 477             TimerDump( p_obj, p_counter, VLC_FALSE );
 478         }
 479     }
 480     vlc_mutex_unlock( &p_handler->object_lock );
 481     vlc_object_release( p_handler );
 482 }
 483
 484
 485 /********************************************************************
 486  * Following functions are local
 487  ********************************************************************/
 488
 489 /**
 490  * Update a statistics counter, according to its type
 491  * If needed, perform a bit of computation (derivative, mostly)
 492  * This function must be entered with stats handler lock
 493  * \param p_handler stats handler singleton
 494  * \param p_counter the counter to update
 495  * \param val the "new" value
 496  * \return an error code
 497  */
 498 static int stats_CounterUpdate( stats_handler_t *p_handler,
 499                                 counter_t *p_counter,
 500                                 vlc_value_t val, vlc_value_t *new_val )
 501 {
 502     switch( p_counter->i_compute_type )
 503     {
 504     case STATS_LAST:
 505     case STATS_MIN:
 506     case STATS_MAX:
 507         if( p_counter->i_samples > 1)
 508         {
 509             msg_Err( p_handler, "LAST counter has several samples !" );
 510             return VLC_EGENERIC;
 511         }
 512         if( p_counter->i_type != VLC_VAR_FLOAT &&
 513             p_counter->i_type != VLC_VAR_INTEGER &&
 514             p_counter->i_compute_type != STATS_LAST )
 515         {
 516             msg_Err( p_handler, "unable to compute MIN or MAX for this type");
 517             return VLC_EGENERIC;
 518         }
 519
 520         if( p_counter->i_samples == 0 )
 521         {
 522             counter_sample_t *p_new = (counter_sample_t*)malloc(
 523                                                sizeof( counter_sample_t ) );
 524             p_new->value.psz_string = NULL;
 525
 526             INSERT_ELEM( p_counter->pp_samples, p_counter->i_samples,
 527                          p_counter->i_samples, p_new );
 528         }
 529         if( p_counter->i_samples == 1 )
 530         {
 531             /* Update if : LAST or (MAX and bigger) or (MIN and bigger) */
 532             if( p_counter->i_compute_type == STATS_LAST ||
 533                 ( p_counter->i_compute_type == STATS_MAX &&
 534                    ( ( p_counter->i_type == VLC_VAR_INTEGER &&
 535                        p_counter->pp_samples[0]->value.i_int > val.i_int ) ||
 536                      ( p_counter->i_type == VLC_VAR_FLOAT &&
 537                        p_counter->pp_samples[0]->value.f_float > val.f_float )
 538                    ) ) ||
 539                 ( p_counter->i_compute_type == STATS_MIN &&
 540                    ( ( p_counter->i_type == VLC_VAR_INTEGER &&
 541                        p_counter->pp_samples[0]->value.i_int < val.i_int ) ||
 542                      ( p_counter->i_type == VLC_VAR_FLOAT &&
 543                        p_counter->pp_samples[0]->value.f_float < val.f_float )
 544                    ) ) )
 545             {
 546                 if( p_counter->i_type == VLC_VAR_STRING &&
 547                     p_counter->pp_samples[0]->value.psz_string )
 548                 {
 549                     free( p_counter->pp_samples[0]->value.psz_string );
 550                 }
 551                 p_counter->pp_samples[0]->value = val;
 552                 *new_val = p_counter->pp_samples[0]->value;
 553             }
 554         }
 555         break;
 556     case STATS_DERIVATIVE:
 557     {
 558         counter_sample_t *p_new, *p_old;
 559         if( mdate() - p_counter->last_update < p_counter->update_interval )
 560         {
 561             return VLC_EGENERIC;
 562         }
 563         p_counter->last_update = mdate();
 564         if( p_counter->i_type != VLC_VAR_FLOAT &&
 565             p_counter->i_type != VLC_VAR_INTEGER )
 566         {
 567             msg_Err( p_handler, "Unable to compute DERIVATIVE for this type");
 568             return VLC_EGENERIC;
 569         }
 570         /* Insert the new one at the beginning */
 571         p_new = (counter_sample_t*)malloc( sizeof( counter_sample_t ) );
 572         p_new->value = val;
 573         p_new->date = p_counter->last_update;
 574         INSERT_ELEM( p_counter->pp_samples, p_counter->i_samples,
 575                      0, p_new );
 576
 577         if( p_counter->i_samples == 3 )
 578         {
 579             p_old = p_counter->pp_samples[2];
 580             REMOVE_ELEM( p_counter->pp_samples, p_counter->i_samples, 2 );
 581             free( p_old );
 582         }
 583         break;
 584     }
 585     case STATS_COUNTER:
 586         if( p_counter->i_samples > 1)
 587         {
 588             msg_Err( p_handler, "LAST counter has several samples !" );
 589             return VLC_EGENERIC;
 590         }
 591         if( p_counter->i_samples == 0 )
 592         {
 593             counter_sample_t *p_new = (counter_sample_t*)malloc(
 594                                                sizeof( counter_sample_t ) );
 595             p_new->value.psz_string = NULL;
 596
 597             INSERT_ELEM( p_counter->pp_samples, p_counter->i_samples,
 598                          p_counter->i_samples, p_new );
 599         }
 600         if( p_counter->i_samples == 1 )
 601         {
 602             switch( p_counter->i_type )
 603             {
 604             case VLC_VAR_INTEGER:
 605                 p_counter->pp_samples[0]->value.i_int += val.i_int;
 606                 if( new_val )
 607                     new_val->i_int = p_counter->pp_samples[0]->value.i_int;
 608                 break;
 609             case VLC_VAR_FLOAT:
 610                 p_counter->pp_samples[0]->value.f_float += val.f_float;
 611                 if( new_val )
 612                     new_val->f_float = p_counter->pp_samples[0]->value.f_float;
 613             default:
 614                 msg_Err( p_handler, "Trying to increment invalid variable %s",
 615                          p_counter->psz_name );
 616                 return VLC_EGENERIC;
 617             }
 618         }
 619         break;
 620     }
 621     return VLC_SUCCESS;
 622 }
 623
 624 static counter_t *GetCounter( stats_handler_t *p_handler, int i_object_id,
 625                               unsigned int i_counter )
 626 {
 627     int i;
 628     uint64_t i_index = ((uint64_t) i_object_id << 32 ) + i_counter;
 629     for (i = 0 ; i < p_handler->i_counters ; i++ )
 630     {
 631          if( i_index == p_handler->pp_counters[i]->i_index )
 632              return p_handler->pp_counters[i];
 633     }
 634     return NULL;
 635 }
 636
 637
 638 static stats_handler_t *stats_HandlerGet( vlc_object_t *p_this )
 639 {
 640     stats_handler_t *p_handler = p_this->p_libvlc->p_stats;
 641     if( !p_handler )
 642     {
 643         p_handler = stats_HandlerCreate( p_this );
 644         if( !p_handler )
 645         {
 646             return NULL;
 647         }
 648     }
 649     vlc_object_yield( p_handler );
 650     return p_handler;
 651 }
 652
 653 /**
 654  * Initialize statistics handler
 655  *
 656  * This function initializes the global statistics handler singleton,
 657  * \param p_this the parent VLC object
 658  */
 659 static stats_handler_t* stats_HandlerCreate( vlc_object_t *p_this )
 660 {
 661     stats_handler_t *p_handler;
 662
 663     msg_Dbg( p_this, "creating statistics handler" );
 664
 665     p_handler = (stats_handler_t*) vlc_object_create( p_this,
 666                                                       VLC_OBJECT_STATS );
 667
 668     if( !p_handler )
 669     {
 670         msg_Err( p_this, "out of memory" );
 671         return NULL;
 672     }
 673     p_handler->i_counters = 0;
 674     p_handler->pp_counters = NULL;
 675
 676     /// \bug is it p_vlc or p_libvlc ?
 677     vlc_object_attach( p_handler, p_this->p_vlc );
 678
 679     p_this->p_libvlc->p_stats = p_handler;
 680
 681     return p_handler;
 682 }
 683
 684 static void TimerDump( vlc_object_t *p_obj, counter_t *p_counter,
 685                        vlc_bool_t b_total )
 686 {
 687     mtime_t last, total;
 688     int i_total;
 689     if( !p_counter || p_counter->i_samples != 2 )
 690     {
 691         msg_Err( p_obj, "Timer %s does not exist", p_counter->psz_name );
 692         return;
 693     }
 694     i_total = p_counter->pp_samples[1]->value.i_int;
 695     total = p_counter->pp_samples[1]->date;
 696     if( p_counter->pp_samples[0]->value.b_bool == VLC_TRUE )
 697     {
 698         last = mdate() - p_counter->pp_samples[0]->date;
 699         i_total += 1;
 700         total += last;
 701     }
 702     else
 703     {
 704         last = p_counter->pp_samples[0]->date;
 705     }
 706     if( b_total )
 707     {
 708         msg_Dbg( p_obj,
 709              "TIMER %s : %.3f ms - Total %.3f ms / %i intvls (Avg %.3f ms)",
 710              p_counter->psz_name, (float)last/1000, (float)total/1000, i_total,
 711              (float)(total)/(1000*(float)i_total ) );
 712     }
 713     else
 714     {
 715         msg_Dbg( p_obj,
 716              "TIMER %s : Total %.3f ms / %i intvls (Avg %.3f ms)",
 717              p_counter->psz_name, (float)total/1000, i_total,
 718              (float)(total)/(1000*(float)i_total ) );
 719     }
 720 }