git.sesse.net Git - vlc/blob - modules/stream_out/bridge.c

   1 /*****************************************************************************
   2  * bridge.c: bridge stream output module
   3  *****************************************************************************
   4  * Copyright (C) 2005-2008 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   8  *          Antoine Cellerier <dionoea at videolan dot org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc_common.h>
  34 #include <vlc_plugin.h>
  35 #include <vlc_sout.h>
  36 #include <vlc_block.h>
  37
  38 /*****************************************************************************
  39  * Module descriptor
  40  *****************************************************************************/
  41 #define ID_TEXT N_("ID")
  42 #define ID_LONGTEXT N_( \
  43     "Integer identifier for this elementary stream. This will be used to " \
  44     "\"find\" this stream later." )
  45
  46 #define DEST_TEXT N_( "Destination bridge-in name" )
  47 #define DEST_LONGTEXT N_( \
  48     "Name of the destination bridge-in. If you do not need more " \
  49     "than one bridge-in at a time, you can discard this option." )
  50
  51 #define DELAY_TEXT N_("Delay")
  52 #define DELAY_LONGTEXT N_("Pictures coming from the picture video outputs " \
  53         "will be delayed according to this value (in milliseconds, should be "\
  54         ">= 100 ms). For high values, you will need to raise caching values." )
  55
  56 #define ID_OFFSET_TEXT N_("ID Offset")
  57 #define ID_OFFSET_LONGTEXT N_("Offset to add to the stream IDs specified in " \
  58         "bridge_out to obtain the stream IDs bridge_in will register.")
  59
  60 #define NAME_TEXT N_( "Name of current instance" )
  61 #define NAME_LONGTEXT N_( \
  62     "Name of this bridge-in instance. If you do not need more " \
  63     "than one bridge-in at a time, you can discard this option." )
  64
  65 #define PLACEHOLDER_TEXT N_( "Fallback to placeholder stream when out of data" )
  66 #define PLACEHOLDER_LONGTEXT N_( \
  67     "If set to true, the bridge will discard all input elementary streams " \
  68     "except if it doesn't receive data from another bridge-in. This can " \
  69     "be used to configure a place holder stream when the real source " \
  70     "breaks. Source and placeholder streams should have the same format. " )
  71
  72 #define PLACEHOLDER_DELAY_TEXT N_( "Placeholder delay" )
  73 #define PLACEHOLDER_DELAY_LONGTEXT N_( \
  74     "Delay (in ms) before the placeholder kicks in." )
  75
  76 #define PLACEHOLDER_IFRAME_TEXT N_( "Wait for I frame before toggling placeholder" )
  77 #define PLACEHOLDER_IFRAME_LONGTEXT N_( \
  78     "If enabled, switching between the placeholder and the normal stream " \
  79     "will only occur on I frames. This will remove artifacts on stream " \
  80     "switching at the expense of a slightly longer delay, depending on " \
  81     "the frequence of I frames in the streams." )
  82
  83 static int  OpenOut ( vlc_object_t * );
  84 static void CloseOut( vlc_object_t * );
  85 static int  OpenIn  ( vlc_object_t * );
  86 static void CloseIn ( vlc_object_t * );
  87
  88 #define SOUT_CFG_PREFIX_OUT "sout-bridge-out-"
  89 #define SOUT_CFG_PREFIX_IN "sout-bridge-in-"
  90
  91 vlc_module_begin ()
  92     set_shortname( N_("Bridge"))
  93     set_description( N_("Bridge stream output"))
  94     add_submodule ()
  95     set_section( N_("Bridge out"), NULL )
  96     set_capability( "sout stream", 50 )
  97     add_shortcut( "bridge-out" )
  98     /* Only usable with VLM. No category so not in gui preferences
  99     set_category( CAT_SOUT )
 100     set_subcategory( SUBCAT_SOUT_STREAM )*/
 101     add_integer( SOUT_CFG_PREFIX_OUT "id", 0, ID_TEXT, ID_LONGTEXT,
 102                  false )
 103     add_string( SOUT_CFG_PREFIX_OUT "in-name", "default",
 104                 DEST_TEXT, DEST_LONGTEXT, false )
 105     set_callbacks( OpenOut, CloseOut )
 106
 107     add_submodule ()
 108     set_section( N_("Bridge in"), NULL )
 109     set_capability( "sout stream", 50 )
 110     add_shortcut( "bridge-in" )
 111     /*set_category( CAT_SOUT )
 112     set_subcategory( SUBCAT_SOUT_STREAM )*/
 113     add_integer( SOUT_CFG_PREFIX_IN "delay", 0, DELAY_TEXT,
 114                  DELAY_LONGTEXT, false )
 115     add_integer( SOUT_CFG_PREFIX_IN "id-offset", 8192, ID_OFFSET_TEXT,
 116                  ID_OFFSET_LONGTEXT, false )
 117     add_string( SOUT_CFG_PREFIX_IN "name", "default",
 118                 NAME_TEXT, NAME_LONGTEXT, false )
 119     add_bool( SOUT_CFG_PREFIX_IN "placeholder", false,
 120               PLACEHOLDER_TEXT, PLACEHOLDER_LONGTEXT, false )
 121     add_integer( SOUT_CFG_PREFIX_IN "placeholder-delay", 200,
 122                  PLACEHOLDER_DELAY_TEXT, PLACEHOLDER_DELAY_LONGTEXT, false )
 123     add_bool( SOUT_CFG_PREFIX_IN "placeholder-switch-on-iframe", true,
 124               PLACEHOLDER_IFRAME_TEXT, PLACEHOLDER_IFRAME_LONGTEXT, false )
 125     set_callbacks( OpenIn, CloseIn )
 126
 127 vlc_module_end ()
 128
 129
 130 /*****************************************************************************
 131  * Local prototypes
 132  *****************************************************************************/
 133 static const char *const ppsz_sout_options_out[] = {
 134     "id", "in-name", NULL
 135 };
 136
 137 static const char *const ppsz_sout_options_in[] = {
 138     "delay", "id-offset", "name",
 139     "placeholder", "placeholder-delay", "placeholder-switch-on-iframe",
 140     NULL
 141 };
 142
 143 static sout_stream_id_t *AddOut ( sout_stream_t *, es_format_t * );
 144 static int               DelOut ( sout_stream_t *, sout_stream_id_t * );
 145 static int               SendOut( sout_stream_t *, sout_stream_id_t *, block_t * );
 146
 147 static sout_stream_id_t *AddIn ( sout_stream_t *, es_format_t * );
 148 static int               DelIn ( sout_stream_t *, sout_stream_id_t * );
 149 static int               SendIn( sout_stream_t *, sout_stream_id_t *, block_t * );
 150
 151 typedef struct bridged_es_t
 152 {
 153     es_format_t fmt;
 154     block_t *p_block;
 155     block_t **pp_last;
 156     bool b_empty;
 157
 158     /* bridge in part */
 159     sout_stream_id_t *id;
 160     mtime_t i_last;
 161     bool b_changed;
 162 } bridged_es_t;
 163
 164 typedef struct bridge_t
 165 {
 166     bridged_es_t **pp_es;
 167     int i_es_num;
 168 } bridge_t;
 169
 170 static vlc_mutex_t lock = VLC_STATIC_MUTEX;
 171
 172 /*
 173  * Bridge out
 174  */
 175
 176 typedef struct out_sout_stream_sys_t
 177 {
 178     bridged_es_t *p_es;
 179     int i_id;
 180     bool b_inited;
 181
 182     char *psz_name;
 183 } out_sout_stream_sys_t;
 184
 185 /*****************************************************************************
 186  * OpenOut:
 187  *****************************************************************************/
 188 static int OpenOut( vlc_object_t *p_this )
 189 {
 190     sout_stream_t     *p_stream = (sout_stream_t *)p_this;
 191     out_sout_stream_sys_t *p_sys;
 192     vlc_value_t val;
 193
 194     config_ChainParse( p_stream, SOUT_CFG_PREFIX_OUT, ppsz_sout_options_out,
 195                    p_stream->p_cfg );
 196
 197     p_sys          = malloc( sizeof( out_sout_stream_sys_t ) );
 198     if( unlikely( !p_sys ) )
 199         return VLC_ENOMEM;
 200     p_sys->b_inited = false;
 201
 202     var_Get( p_stream, SOUT_CFG_PREFIX_OUT "id", &val );
 203     p_sys->i_id = val.i_int;
 204
 205     var_Get( p_stream, SOUT_CFG_PREFIX_OUT "in-name", &val );
 206     if( asprintf( &p_sys->psz_name, "bridge-struct-%s", val.psz_string )<0 )
 207     {
 208         free( val.psz_string );
 209         free( p_sys );
 210         return VLC_ENOMEM;
 211     }
 212     free( val.psz_string );
 213
 214     p_stream->pf_add    = AddOut;
 215     p_stream->pf_del    = DelOut;
 216     p_stream->pf_send   = SendOut;
 217
 218     p_stream->p_sys     = (sout_stream_sys_t *)p_sys;
 219
 220     p_stream->p_sout->i_out_pace_nocontrol++;
 221
 222     return VLC_SUCCESS;
 223 }
 224
 225 /*****************************************************************************
 226  * CloseOut:
 227  *****************************************************************************/
 228 static void CloseOut( vlc_object_t * p_this )
 229 {
 230     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 231     out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
 232
 233     p_stream->p_sout->i_out_pace_nocontrol--;
 234
 235     free( p_sys->psz_name );
 236     free( p_sys );
 237 }
 238
 239 static sout_stream_id_t * AddOut( sout_stream_t *p_stream, es_format_t *p_fmt )
 240 {
 241     out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
 242     bridge_t *p_bridge;
 243     bridged_es_t *p_es;
 244     int i;
 245
 246     if ( p_sys->b_inited )
 247     {
 248         msg_Err( p_stream, "bridge-out can only handle 1 es at a time." );
 249         return NULL;
 250     }
 251     p_sys->b_inited = true;
 252
 253     vlc_mutex_lock( &lock );
 254
 255     p_bridge = var_GetAddress( p_stream->p_libvlc, p_sys->psz_name );
 256     if ( p_bridge == NULL )
 257     {
 258         p_bridge = xmalloc( sizeof( bridge_t ) );
 259
 260         var_Create( p_stream->p_libvlc, p_sys->psz_name, VLC_VAR_ADDRESS );
 261         var_SetAddress( p_stream->p_libvlc, p_sys->psz_name, p_bridge );
 262
 263         p_bridge->i_es_num = 0;
 264         p_bridge->pp_es = NULL;
 265     }
 266
 267     for ( i = 0; i < p_bridge->i_es_num; i++ )
 268     {
 269         if ( p_bridge->pp_es[i]->b_empty && !p_bridge->pp_es[i]->b_changed )
 270             break;
 271     }
 272
 273     if ( i == p_bridge->i_es_num )
 274     {
 275         p_bridge->pp_es = xrealloc( p_bridge->pp_es,
 276                           (p_bridge->i_es_num + 1) * sizeof(bridged_es_t *) );
 277         p_bridge->i_es_num++;
 278         p_bridge->pp_es[i] = xmalloc( sizeof(bridged_es_t) );
 279     }
 280
 281     p_sys->p_es = p_es = p_bridge->pp_es[i];
 282
 283     p_es->fmt = *p_fmt;
 284     p_es->fmt.i_id = p_sys->i_id;
 285     p_es->p_block = NULL;
 286     p_es->pp_last = &p_es->p_block;
 287     p_es->b_empty = false;
 288
 289     p_es->id = NULL;
 290     p_es->i_last = VLC_TS_INVALID;
 291     p_es->b_changed = true;
 292
 293     msg_Dbg( p_stream, "bridging out input codec=%4.4s id=%d pos=%d",
 294              (char*)&p_es->fmt.i_codec, p_es->fmt.i_id, i );
 295
 296     vlc_mutex_unlock( &lock );
 297
 298     return (sout_stream_id_t *)p_sys;
 299 }
 300
 301 static int DelOut( sout_stream_t *p_stream, sout_stream_id_t *id )
 302 {
 303     VLC_UNUSED(id);
 304     out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
 305     bridged_es_t *p_es;
 306
 307     if ( !p_sys->b_inited )
 308     {
 309         return VLC_SUCCESS;
 310     }
 311
 312     vlc_mutex_lock( &lock );
 313
 314     p_es = p_sys->p_es;
 315
 316     p_es->b_empty = true;
 317     block_ChainRelease( p_es->p_block );
 318     p_es->p_block = false;
 319
 320     p_es->b_changed = true;
 321     vlc_mutex_unlock( &lock );
 322
 323     p_sys->b_inited = false;
 324
 325     return VLC_SUCCESS;
 326 }
 327
 328 static int SendOut( sout_stream_t *p_stream, sout_stream_id_t *id,
 329                     block_t *p_buffer )
 330 {
 331     out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
 332     bridged_es_t *p_es;
 333
 334     if ( (out_sout_stream_sys_t *)id != p_sys )
 335     {
 336         block_ChainRelease( p_buffer );
 337         return VLC_SUCCESS;
 338     }
 339
 340     vlc_mutex_lock( &lock );
 341
 342     p_es = p_sys->p_es;
 343     *p_es->pp_last = p_buffer;
 344     while ( p_buffer != NULL )
 345     {
 346         p_es->pp_last = &p_buffer->p_next;
 347         p_buffer = p_buffer->p_next;
 348     }
 349
 350     vlc_mutex_unlock( &lock );
 351
 352     return VLC_SUCCESS;
 353 }
 354
 355
 356 /*
 357  * Bridge in
 358  */
 359
 360 typedef struct in_sout_stream_sys_t
 361 {
 362     int i_id_offset;
 363     mtime_t i_delay;
 364
 365     char *psz_name;
 366
 367     bool b_placeholder;
 368     bool b_switch_on_iframe;
 369     int i_state;
 370     mtime_t i_placeholder_delay;
 371     sout_stream_id_t *id_video;
 372     mtime_t i_last_video;
 373     sout_stream_id_t *id_audio;
 374     mtime_t i_last_audio;
 375 } in_sout_stream_sys_t;
 376
 377 enum { placeholder_on, placeholder_off };
 378
 379 /*****************************************************************************
 380  * OpenIn:
 381  *****************************************************************************/
 382 static int OpenIn( vlc_object_t *p_this )
 383 {
 384     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 385     in_sout_stream_sys_t *p_sys;
 386     vlc_value_t val;
 387
 388     p_sys          = malloc( sizeof( in_sout_stream_sys_t ) );
 389     if( unlikely( !p_sys ) )
 390         return VLC_ENOMEM;
 391
 392     if( !p_stream->p_next )
 393     {
 394         msg_Err( p_stream, "cannot create chain" );
 395         free( p_sys );
 396         return VLC_EGENERIC;
 397     }
 398
 399     config_ChainParse( p_stream, SOUT_CFG_PREFIX_IN, ppsz_sout_options_in,
 400                    p_stream->p_cfg );
 401
 402     var_Get( p_stream, SOUT_CFG_PREFIX_IN "id-offset", &val );
 403     p_sys->i_id_offset = val.i_int;
 404
 405     var_Get( p_stream, SOUT_CFG_PREFIX_IN "delay", &val );
 406     p_sys->i_delay = (mtime_t)val.i_int * 1000;
 407
 408     var_Get( p_stream, SOUT_CFG_PREFIX_IN "name", &val );
 409     if( asprintf( &p_sys->psz_name, "bridge-struct-%s", val.psz_string )<0 )
 410     {
 411         free( val.psz_string );
 412         free( p_sys );
 413         return VLC_ENOMEM;
 414     }
 415     free( val.psz_string );
 416
 417     var_Get( p_stream, SOUT_CFG_PREFIX_IN "placeholder", &val );
 418     p_sys->b_placeholder = val.b_bool;
 419
 420     var_Get( p_stream, SOUT_CFG_PREFIX_IN "placeholder-switch-on-iframe", &val);
 421     p_sys->b_switch_on_iframe = val.b_bool;
 422
 423     p_sys->i_state = placeholder_on;
 424
 425     var_Get( p_stream, SOUT_CFG_PREFIX_IN "placeholder-delay", &val );
 426     p_sys->i_placeholder_delay = (mtime_t)val.i_int * 1000;
 427
 428     p_sys->i_last_video = VLC_TS_INVALID;
 429     p_sys->i_last_audio = VLC_TS_INVALID;
 430     p_sys->id_video = NULL;
 431     p_sys->id_audio = NULL;
 432
 433     p_stream->pf_add    = AddIn;
 434     p_stream->pf_del    = DelIn;
 435     p_stream->pf_send   = SendIn;
 436
 437     p_stream->p_sys     = (sout_stream_sys_t *)p_sys;
 438
 439     /* update p_sout->i_out_pace_nocontrol */
 440     p_stream->p_sout->i_out_pace_nocontrol++;
 441
 442     return VLC_SUCCESS;
 443 }
 444
 445 /*****************************************************************************
 446  * CloseIn:
 447  *****************************************************************************/
 448 static void CloseIn( vlc_object_t * p_this )
 449 {
 450     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 451     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 452
 453     p_stream->p_sout->i_out_pace_nocontrol--;
 454
 455     free( p_sys->psz_name );
 456     free( p_sys );
 457 }
 458
 459 struct sout_stream_id_t
 460 {
 461     sout_stream_id_t *id;
 462     int i_cat; /* es category. Used for placeholder option */
 463 };
 464
 465 static sout_stream_id_t * AddIn( sout_stream_t *p_stream, es_format_t *p_fmt )
 466 {
 467     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 468
 469     sout_stream_id_t *id = malloc( sizeof( sout_stream_id_t ) );
 470     if( !id ) return NULL;
 471
 472     id->id = p_stream->p_next->pf_add( p_stream->p_next, p_fmt );
 473     if( !id->id )
 474     {
 475         free( id );
 476         return NULL;
 477     }
 478
 479     if( p_sys->b_placeholder )
 480     {
 481         id->i_cat = p_fmt->i_cat;
 482         switch( p_fmt->i_cat )
 483         {
 484             case VIDEO_ES:
 485                 if( p_sys->id_video != NULL )
 486                     msg_Err( p_stream, "We already had a video es!" );
 487                 p_sys->id_video = id->id;
 488                 break;
 489             case AUDIO_ES:
 490                 if( p_sys->id_audio != NULL )
 491                     msg_Err( p_stream, "We already had an audio es!" );
 492                 p_sys->id_audio = id->id;
 493                 break;
 494         }
 495     }
 496
 497     return id;
 498 }
 499
 500 static int DelIn( sout_stream_t *p_stream, sout_stream_id_t *id )
 501 {
 502     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 503
 504     if( id == p_sys->id_video ) p_sys->id_video = NULL;
 505     if( id == p_sys->id_audio ) p_sys->id_audio = NULL;
 506
 507     int ret = p_stream->p_next->pf_del( p_stream->p_next, id->id );
 508
 509     free( id );
 510     return ret;
 511 }
 512
 513 static int SendIn( sout_stream_t *p_stream, sout_stream_id_t *id,
 514                    block_t *p_buffer )
 515 {
 516     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 517     bridge_t *p_bridge;
 518     bool b_no_es = true;
 519     int i;
 520     int i_date = mdate();
 521
 522     /* First forward the packet for our own ES */
 523     if( !p_sys->b_placeholder )
 524         p_stream->p_next->pf_send( p_stream->p_next, id->id, p_buffer );
 525
 526     /* Then check all bridged streams */
 527     vlc_mutex_lock( &lock );
 528
 529     p_bridge = var_GetAddress( p_stream->p_libvlc, p_sys->psz_name );
 530
 531     if( p_bridge )
 532     {
 533     for ( i = 0; i < p_bridge->i_es_num; i++ )
 534     {
 535         if ( !p_bridge->pp_es[i]->b_empty )
 536             b_no_es = false;
 537
 538         while ( p_bridge->pp_es[i]->p_block != NULL
 539                  && (p_bridge->pp_es[i]->p_block->i_dts + p_sys->i_delay
 540                        < i_date
 541                       || p_bridge->pp_es[i]->p_block->i_dts + p_sys->i_delay
 542                           < p_bridge->pp_es[i]->i_last) )
 543         {
 544             block_t *p_block = p_bridge->pp_es[i]->p_block;
 545             msg_Dbg( p_stream, "dropping a packet (%"PRId64 ")",
 546                      i_date - p_block->i_dts - p_sys->i_delay );
 547             p_bridge->pp_es[i]->p_block
 548                 = p_bridge->pp_es[i]->p_block->p_next;
 549             block_Release( p_block );
 550         }
 551
 552         if ( p_bridge->pp_es[i]->p_block == NULL )
 553         {
 554             p_bridge->pp_es[i]->pp_last = &p_bridge->pp_es[i]->p_block;
 555         }
 556
 557         if ( p_bridge->pp_es[i]->b_changed )
 558         {
 559             if ( p_bridge->pp_es[i]->b_empty && p_bridge->pp_es[i]->id != NULL )
 560             {
 561                 p_stream->p_next->pf_del( p_stream->p_next, p_bridge->pp_es[i]->id );
 562             }
 563             else
 564             {
 565                 /* We need at least two packets to enter the mux. */
 566                 if ( p_bridge->pp_es[i]->p_block == NULL
 567                       || p_bridge->pp_es[i]->p_block->p_next == NULL )
 568                 {
 569                     continue;
 570                 }
 571
 572                 p_bridge->pp_es[i]->fmt.i_id += p_sys->i_id_offset;
 573                 if( !p_sys->b_placeholder )
 574                 {
 575                     p_bridge->pp_es[i]->id = p_stream->p_next->pf_add(
 576                                 p_stream->p_next, &p_bridge->pp_es[i]->fmt );
 577                     if ( p_bridge->pp_es[i]->id == NULL )
 578                     {
 579                         msg_Warn( p_stream, "couldn't create chain for id %d",
 580                                   p_bridge->pp_es[i]->fmt.i_id );
 581                     }
 582                 }
 583                 msg_Dbg( p_stream, "bridging in input codec=%4.4s id=%d pos=%d",
 584                          (char*)&p_bridge->pp_es[i]->fmt.i_codec,
 585                          p_bridge->pp_es[i]->fmt.i_id, i );
 586             }
 587         }
 588         p_bridge->pp_es[i]->b_changed = false;
 589
 590         if ( p_bridge->pp_es[i]->b_empty )
 591             continue;
 592
 593         if ( p_bridge->pp_es[i]->p_block == NULL )
 594         {
 595             if ( p_bridge->pp_es[i]->id != NULL
 596                   && p_bridge->pp_es[i]->i_last < i_date )
 597             {
 598                 if( !p_sys->b_placeholder )
 599                     p_stream->p_next->pf_del( p_stream->p_next,
 600                                           p_bridge->pp_es[i]->id );
 601                 p_bridge->pp_es[i]->fmt.i_id -= p_sys->i_id_offset;
 602                 p_bridge->pp_es[i]->b_changed = true;
 603                 p_bridge->pp_es[i]->id = NULL;
 604             }
 605             continue;
 606         }
 607
 608         if ( p_bridge->pp_es[i]->id != NULL || p_sys->b_placeholder)
 609         {
 610             block_t *p_block = p_bridge->pp_es[i]->p_block;
 611             while ( p_block != NULL )
 612             {
 613                 p_bridge->pp_es[i]->i_last = p_block->i_dts;
 614                 p_block->i_pts += p_sys->i_delay;
 615                 p_block->i_dts += p_sys->i_delay;
 616                 p_block = p_block->p_next;
 617             }
 618             sout_stream_id_t *newid = NULL;
 619             if( p_sys->b_placeholder )
 620             {
 621                 switch( p_bridge->pp_es[i]->fmt.i_cat )
 622                 {
 623                     case VIDEO_ES:
 624                         p_sys->i_last_video = i_date;
 625                         newid = p_sys->id_video;
 626                         if( !newid )
 627                             break;
 628                         if( !p_sys->b_switch_on_iframe ||
 629                             p_sys->i_state == placeholder_off ||
 630                             ( p_bridge->pp_es[i]->fmt.i_cat == VIDEO_ES &&
 631                               p_bridge->pp_es[i]->p_block->i_flags & BLOCK_FLAG_TYPE_I ) )
 632                         {
 633                             p_stream->p_next->pf_send( p_stream->p_next,
 634                                        newid,
 635                                        p_bridge->pp_es[i]->p_block );
 636                             p_sys->i_state = placeholder_off;
 637                         }
 638                         break;
 639                     case AUDIO_ES:
 640                         newid = p_sys->id_audio;
 641                         if( !newid )
 642                             break;
 643                         p_sys->i_last_audio = i_date;
 644                     default:
 645                         p_stream->p_next->pf_send( p_stream->p_next,
 646                                    newid?newid:p_bridge->pp_es[i]->id,
 647                                    p_bridge->pp_es[i]->p_block );
 648                         break;
 649                 }
 650             }
 651             else /* !b_placeholder */
 652                 p_stream->p_next->pf_send( p_stream->p_next,
 653                                        p_bridge->pp_es[i]->id,
 654                                        p_bridge->pp_es[i]->p_block );
 655         }
 656         else
 657         {
 658             block_ChainRelease( p_bridge->pp_es[i]->p_block );
 659         }
 660
 661         p_bridge->pp_es[i]->p_block = NULL;
 662         p_bridge->pp_es[i]->pp_last = &p_bridge->pp_es[i]->p_block;
 663     }
 664
 665     if( b_no_es )
 666     {
 667         for ( i = 0; i < p_bridge->i_es_num; i++ )
 668             free( p_bridge->pp_es[i] );
 669         free( p_bridge->pp_es );
 670         free( p_bridge );
 671         var_Destroy( p_stream->p_libvlc, p_sys->psz_name );
 672     }
 673     }
 674
 675     if( p_sys->b_placeholder )
 676     {
 677         switch( id->i_cat )
 678         {
 679             case VIDEO_ES:
 680                 if( ( p_sys->i_last_video + p_sys->i_placeholder_delay < i_date
 681                     && (  !p_sys->b_switch_on_iframe
 682                        || p_buffer->i_flags & BLOCK_FLAG_TYPE_I ) )
 683                   || p_sys->i_state == placeholder_on )
 684                 {
 685                     p_stream->p_next->pf_send( p_stream->p_next, id->id, p_buffer );
 686                     p_sys->i_state = placeholder_on;
 687                 }
 688                 else
 689                     block_Release( p_buffer );
 690                 break;
 691
 692             case AUDIO_ES:
 693                 if( p_sys->i_last_audio + p_sys->i_placeholder_delay < i_date )
 694                     p_stream->p_next->pf_send( p_stream->p_next, id->id, p_buffer );
 695                 else
 696                     block_Release( p_buffer );
 697                 break;
 698
 699             default:
 700                 block_Release( p_buffer ); /* FIXME: placeholder subs anyone? */
 701                 break;
 702         }
 703     }
 704
 705     vlc_mutex_unlock( &lock );
 706
 707     return VLC_SUCCESS;
 708 }