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 VLC authors and VideoLAN
   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 it
  11  * under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this program; if not, write to the Free Software Foundation,
  22  * 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_sys_t *AddOut( sout_stream_t *, const es_format_t * );
 144 static void              DelOut ( sout_stream_t *, sout_stream_id_sys_t * );
 145 static int               SendOut( sout_stream_t *, sout_stream_id_sys_t *, block_t * );
 146
 147 static sout_stream_id_sys_t *AddIn( sout_stream_t *, const es_format_t * );
 148 static void              DelIn ( sout_stream_t *, sout_stream_id_sys_t * );
 149 static int               SendIn( sout_stream_t *, sout_stream_id_sys_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_sys_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     p_stream->pace_nocontrol = true;
 220
 221     return VLC_SUCCESS;
 222 }
 223
 224 /*****************************************************************************
 225  * CloseOut:
 226  *****************************************************************************/
 227 static void CloseOut( vlc_object_t * p_this )
 228 {
 229     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 230     out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
 231
 232     free( p_sys->psz_name );
 233     free( p_sys );
 234 }
 235
 236 static sout_stream_id_sys_t * AddOut( sout_stream_t *p_stream, const es_format_t *p_fmt )
 237 {
 238     out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
 239     bridge_t *p_bridge;
 240     bridged_es_t *p_es;
 241     int i;
 242
 243     if ( p_sys->b_inited )
 244     {
 245         msg_Err( p_stream, "bridge-out can only handle 1 es at a time." );
 246         return NULL;
 247     }
 248     p_sys->b_inited = true;
 249
 250     vlc_mutex_lock( &lock );
 251
 252     p_bridge = var_GetAddress( p_stream->p_libvlc, p_sys->psz_name );
 253     if ( p_bridge == NULL )
 254     {
 255         p_bridge = xmalloc( sizeof( bridge_t ) );
 256
 257         var_Create( p_stream->p_libvlc, p_sys->psz_name, VLC_VAR_ADDRESS );
 258         var_SetAddress( p_stream->p_libvlc, p_sys->psz_name, p_bridge );
 259
 260         p_bridge->i_es_num = 0;
 261         p_bridge->pp_es = NULL;
 262     }
 263
 264     for ( i = 0; i < p_bridge->i_es_num; i++ )
 265     {
 266         if ( p_bridge->pp_es[i]->b_empty && !p_bridge->pp_es[i]->b_changed )
 267             break;
 268     }
 269
 270     if ( i == p_bridge->i_es_num )
 271     {
 272         p_bridge->pp_es = xrealloc( p_bridge->pp_es,
 273                           (p_bridge->i_es_num + 1) * sizeof(bridged_es_t *) );
 274         p_bridge->i_es_num++;
 275         p_bridge->pp_es[i] = xmalloc( sizeof(bridged_es_t) );
 276     }
 277
 278     p_sys->p_es = p_es = p_bridge->pp_es[i];
 279
 280     p_es->fmt = *p_fmt;
 281     p_es->fmt.i_id = p_sys->i_id;
 282     p_es->p_block = NULL;
 283     p_es->pp_last = &p_es->p_block;
 284     p_es->b_empty = false;
 285
 286     p_es->id = NULL;
 287     p_es->i_last = VLC_TS_INVALID;
 288     p_es->b_changed = true;
 289
 290     msg_Dbg( p_stream, "bridging out input codec=%4.4s id=%d pos=%d",
 291              (char*)&p_es->fmt.i_codec, p_es->fmt.i_id, i );
 292
 293     vlc_mutex_unlock( &lock );
 294
 295     return (sout_stream_id_sys_t *)p_sys;
 296 }
 297
 298 static void DelOut( sout_stream_t *p_stream, sout_stream_id_sys_t *id )
 299 {
 300     VLC_UNUSED(id);
 301     out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
 302     bridged_es_t *p_es;
 303
 304     if ( !p_sys->b_inited )
 305         return;
 306
 307     vlc_mutex_lock( &lock );
 308
 309     p_es = p_sys->p_es;
 310
 311     p_es->b_empty = true;
 312     block_ChainRelease( p_es->p_block );
 313     p_es->p_block = false;
 314
 315     p_es->b_changed = true;
 316     vlc_mutex_unlock( &lock );
 317
 318     p_sys->b_inited = false;
 319 }
 320
 321 static int SendOut( sout_stream_t *p_stream, sout_stream_id_sys_t *id,
 322                     block_t *p_buffer )
 323 {
 324     out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
 325     bridged_es_t *p_es;
 326
 327     if ( (out_sout_stream_sys_t *)id != p_sys )
 328     {
 329         block_ChainRelease( p_buffer );
 330         return VLC_SUCCESS;
 331     }
 332
 333     vlc_mutex_lock( &lock );
 334
 335     p_es = p_sys->p_es;
 336     *p_es->pp_last = p_buffer;
 337     while ( p_buffer != NULL )
 338     {
 339         p_es->pp_last = &p_buffer->p_next;
 340         p_buffer = p_buffer->p_next;
 341     }
 342
 343     vlc_mutex_unlock( &lock );
 344
 345     return VLC_SUCCESS;
 346 }
 347
 348
 349 /*
 350  * Bridge in
 351  */
 352
 353 typedef struct in_sout_stream_sys_t
 354 {
 355     int i_id_offset;
 356     mtime_t i_delay;
 357
 358     char *psz_name;
 359
 360     bool b_placeholder;
 361     bool b_switch_on_iframe;
 362     int i_state;
 363     mtime_t i_placeholder_delay;
 364     sout_stream_id_sys_t *id_video;
 365     mtime_t i_last_video;
 366     sout_stream_id_sys_t *id_audio;
 367     mtime_t i_last_audio;
 368 } in_sout_stream_sys_t;
 369
 370 enum { placeholder_on, placeholder_off };
 371
 372 /*****************************************************************************
 373  * OpenIn:
 374  *****************************************************************************/
 375 static int OpenIn( vlc_object_t *p_this )
 376 {
 377     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 378     in_sout_stream_sys_t *p_sys;
 379     vlc_value_t val;
 380
 381     p_sys          = malloc( sizeof( in_sout_stream_sys_t ) );
 382     if( unlikely( !p_sys ) )
 383         return VLC_ENOMEM;
 384
 385     if( !p_stream->p_next )
 386     {
 387         msg_Err( p_stream, "cannot create chain" );
 388         free( p_sys );
 389         return VLC_EGENERIC;
 390     }
 391
 392     config_ChainParse( p_stream, SOUT_CFG_PREFIX_IN, ppsz_sout_options_in,
 393                    p_stream->p_cfg );
 394
 395     var_Get( p_stream, SOUT_CFG_PREFIX_IN "id-offset", &val );
 396     p_sys->i_id_offset = val.i_int;
 397
 398     var_Get( p_stream, SOUT_CFG_PREFIX_IN "delay", &val );
 399     p_sys->i_delay = (mtime_t)val.i_int * 1000;
 400
 401     var_Get( p_stream, SOUT_CFG_PREFIX_IN "name", &val );
 402     if( asprintf( &p_sys->psz_name, "bridge-struct-%s", val.psz_string )<0 )
 403     {
 404         free( val.psz_string );
 405         free( p_sys );
 406         return VLC_ENOMEM;
 407     }
 408     free( val.psz_string );
 409
 410     var_Get( p_stream, SOUT_CFG_PREFIX_IN "placeholder", &val );
 411     p_sys->b_placeholder = val.b_bool;
 412
 413     var_Get( p_stream, SOUT_CFG_PREFIX_IN "placeholder-switch-on-iframe", &val);
 414     p_sys->b_switch_on_iframe = val.b_bool;
 415
 416     p_sys->i_state = placeholder_on;
 417
 418     var_Get( p_stream, SOUT_CFG_PREFIX_IN "placeholder-delay", &val );
 419     p_sys->i_placeholder_delay = (mtime_t)val.i_int * 1000;
 420
 421     p_sys->i_last_video = VLC_TS_INVALID;
 422     p_sys->i_last_audio = VLC_TS_INVALID;
 423     p_sys->id_video = NULL;
 424     p_sys->id_audio = NULL;
 425
 426     p_stream->pf_add    = AddIn;
 427     p_stream->pf_del    = DelIn;
 428     p_stream->pf_send   = SendIn;
 429
 430     p_stream->p_sys     = (sout_stream_sys_t *)p_sys;
 431     p_stream->pace_nocontrol = true;
 432
 433     return VLC_SUCCESS;
 434 }
 435
 436 /*****************************************************************************
 437  * CloseIn:
 438  *****************************************************************************/
 439 static void CloseIn( vlc_object_t * p_this )
 440 {
 441     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 442     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 443
 444     free( p_sys->psz_name );
 445     free( p_sys );
 446 }
 447
 448 struct sout_stream_id_sys_t
 449 {
 450     sout_stream_id_sys_t *id;
 451     int i_cat; /* es category. Used for placeholder option */
 452 };
 453
 454 static sout_stream_id_sys_t * AddIn( sout_stream_t *p_stream, const es_format_t *p_fmt )
 455 {
 456     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 457
 458     sout_stream_id_sys_t *id = malloc( sizeof( sout_stream_id_sys_t ) );
 459     if( !id ) return NULL;
 460
 461     id->id = p_stream->p_next->pf_add( p_stream->p_next, p_fmt );
 462     if( !id->id )
 463     {
 464         free( id );
 465         return NULL;
 466     }
 467
 468     if( p_sys->b_placeholder )
 469     {
 470         id->i_cat = p_fmt->i_cat;
 471         switch( p_fmt->i_cat )
 472         {
 473             case VIDEO_ES:
 474                 if( p_sys->id_video != NULL )
 475                     msg_Err( p_stream, "We already had a video es!" );
 476                 p_sys->id_video = id->id;
 477                 break;
 478             case AUDIO_ES:
 479                 if( p_sys->id_audio != NULL )
 480                     msg_Err( p_stream, "We already had an audio es!" );
 481                 p_sys->id_audio = id->id;
 482                 break;
 483         }
 484     }
 485
 486     return id;
 487 }
 488
 489 static void DelIn( sout_stream_t *p_stream, sout_stream_id_sys_t *id )
 490 {
 491     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 492
 493     if( id == p_sys->id_video ) p_sys->id_video = NULL;
 494     if( id == p_sys->id_audio ) p_sys->id_audio = NULL;
 495
 496     p_stream->p_next->pf_del( p_stream->p_next, id->id );
 497     free( id );
 498 }
 499
 500 static int SendIn( sout_stream_t *p_stream, sout_stream_id_sys_t *id,
 501                    block_t *p_buffer )
 502 {
 503     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 504     bridge_t *p_bridge;
 505     bool b_no_es = true;
 506     int i;
 507     int i_date = mdate();
 508
 509     /* First forward the packet for our own ES */
 510     if( !p_sys->b_placeholder )
 511         p_stream->p_next->pf_send( p_stream->p_next, id->id, p_buffer );
 512
 513     /* Then check all bridged streams */
 514     vlc_mutex_lock( &lock );
 515
 516     p_bridge = var_GetAddress( p_stream->p_libvlc, p_sys->psz_name );
 517
 518     if( p_bridge )
 519     {
 520     for ( i = 0; i < p_bridge->i_es_num; i++ )
 521     {
 522         if ( !p_bridge->pp_es[i]->b_empty )
 523             b_no_es = false;
 524
 525         while ( p_bridge->pp_es[i]->p_block != NULL
 526                  && (p_bridge->pp_es[i]->p_block->i_dts + p_sys->i_delay
 527                        < i_date
 528                       || p_bridge->pp_es[i]->p_block->i_dts + p_sys->i_delay
 529                           < p_bridge->pp_es[i]->i_last) )
 530         {
 531             block_t *p_block = p_bridge->pp_es[i]->p_block;
 532             msg_Dbg( p_stream, "dropping a packet (%"PRId64 ")",
 533                      i_date - p_block->i_dts - p_sys->i_delay );
 534             p_bridge->pp_es[i]->p_block
 535                 = p_bridge->pp_es[i]->p_block->p_next;
 536             block_Release( p_block );
 537         }
 538
 539         if ( p_bridge->pp_es[i]->p_block == NULL )
 540         {
 541             p_bridge->pp_es[i]->pp_last = &p_bridge->pp_es[i]->p_block;
 542         }
 543
 544         if ( p_bridge->pp_es[i]->b_changed )
 545         {
 546             if ( p_bridge->pp_es[i]->b_empty && p_bridge->pp_es[i]->id != NULL )
 547             {
 548                 p_stream->p_next->pf_del( p_stream->p_next, p_bridge->pp_es[i]->id );
 549             }
 550             else
 551             {
 552                 /* We need at least two packets to enter the mux. */
 553                 if ( p_bridge->pp_es[i]->p_block == NULL
 554                       || p_bridge->pp_es[i]->p_block->p_next == NULL )
 555                 {
 556                     continue;
 557                 }
 558
 559                 p_bridge->pp_es[i]->fmt.i_id += p_sys->i_id_offset;
 560                 if( !p_sys->b_placeholder )
 561                 {
 562                     p_bridge->pp_es[i]->id = p_stream->p_next->pf_add(
 563                                 p_stream->p_next, &p_bridge->pp_es[i]->fmt );
 564                     if ( p_bridge->pp_es[i]->id == NULL )
 565                     {
 566                         msg_Warn( p_stream, "couldn't create chain for id %d",
 567                                   p_bridge->pp_es[i]->fmt.i_id );
 568                     }
 569                 }
 570                 msg_Dbg( p_stream, "bridging in input codec=%4.4s id=%d pos=%d",
 571                          (char*)&p_bridge->pp_es[i]->fmt.i_codec,
 572                          p_bridge->pp_es[i]->fmt.i_id, i );
 573             }
 574         }
 575         p_bridge->pp_es[i]->b_changed = false;
 576
 577         if ( p_bridge->pp_es[i]->b_empty )
 578             continue;
 579
 580         if ( p_bridge->pp_es[i]->p_block == NULL )
 581         {
 582             if ( p_bridge->pp_es[i]->id != NULL
 583                   && p_bridge->pp_es[i]->i_last < i_date )
 584             {
 585                 if( !p_sys->b_placeholder )
 586                     p_stream->p_next->pf_del( p_stream->p_next,
 587                                           p_bridge->pp_es[i]->id );
 588                 p_bridge->pp_es[i]->fmt.i_id -= p_sys->i_id_offset;
 589                 p_bridge->pp_es[i]->b_changed = true;
 590                 p_bridge->pp_es[i]->id = NULL;
 591             }
 592             continue;
 593         }
 594
 595         if ( p_bridge->pp_es[i]->id != NULL || p_sys->b_placeholder)
 596         {
 597             block_t *p_block = p_bridge->pp_es[i]->p_block;
 598             while ( p_block != NULL )
 599             {
 600                 p_bridge->pp_es[i]->i_last = p_block->i_dts;
 601                 p_block->i_pts += p_sys->i_delay;
 602                 p_block->i_dts += p_sys->i_delay;
 603                 p_block = p_block->p_next;
 604             }
 605             sout_stream_id_sys_t *newid = NULL;
 606             if( p_sys->b_placeholder )
 607             {
 608                 switch( p_bridge->pp_es[i]->fmt.i_cat )
 609                 {
 610                     case VIDEO_ES:
 611                         p_sys->i_last_video = i_date;
 612                         newid = p_sys->id_video;
 613                         if( !newid )
 614                             break;
 615                         if( !p_sys->b_switch_on_iframe ||
 616                             p_sys->i_state == placeholder_off ||
 617                             ( p_bridge->pp_es[i]->fmt.i_cat == VIDEO_ES &&
 618                               p_bridge->pp_es[i]->p_block->i_flags & BLOCK_FLAG_TYPE_I ) )
 619                         {
 620                             p_stream->p_next->pf_send( p_stream->p_next,
 621                                        newid,
 622                                        p_bridge->pp_es[i]->p_block );
 623                             p_sys->i_state = placeholder_off;
 624                         }
 625                         break;
 626                     case AUDIO_ES:
 627                         newid = p_sys->id_audio;
 628                         if( !newid )
 629                             break;
 630                         p_sys->i_last_audio = i_date;
 631                     default:
 632                         p_stream->p_next->pf_send( p_stream->p_next,
 633                                    newid?newid:p_bridge->pp_es[i]->id,
 634                                    p_bridge->pp_es[i]->p_block );
 635                         break;
 636                 }
 637             }
 638             else /* !b_placeholder */
 639                 p_stream->p_next->pf_send( p_stream->p_next,
 640                                        p_bridge->pp_es[i]->id,
 641                                        p_bridge->pp_es[i]->p_block );
 642         }
 643         else
 644         {
 645             block_ChainRelease( p_bridge->pp_es[i]->p_block );
 646         }
 647
 648         p_bridge->pp_es[i]->p_block = NULL;
 649         p_bridge->pp_es[i]->pp_last = &p_bridge->pp_es[i]->p_block;
 650     }
 651
 652     if( b_no_es )
 653     {
 654         for ( i = 0; i < p_bridge->i_es_num; i++ )
 655             free( p_bridge->pp_es[i] );
 656         free( p_bridge->pp_es );
 657         free( p_bridge );
 658         var_Destroy( p_stream->p_libvlc, p_sys->psz_name );
 659     }
 660     }
 661
 662     if( p_sys->b_placeholder )
 663     {
 664         switch( id->i_cat )
 665         {
 666             case VIDEO_ES:
 667                 if( ( p_sys->i_last_video + p_sys->i_placeholder_delay < i_date
 668                     && (  !p_sys->b_switch_on_iframe
 669                        || p_buffer->i_flags & BLOCK_FLAG_TYPE_I ) )
 670                   || p_sys->i_state == placeholder_on )
 671                 {
 672                     p_stream->p_next->pf_send( p_stream->p_next, id->id, p_buffer );
 673                     p_sys->i_state = placeholder_on;
 674                 }
 675                 else
 676                     block_Release( p_buffer );
 677                 break;
 678
 679             case AUDIO_ES:
 680                 if( p_sys->i_last_audio + p_sys->i_placeholder_delay < i_date )
 681                     p_stream->p_next->pf_send( p_stream->p_next, id->id, p_buffer );
 682                 else
 683                     block_Release( p_buffer );
 684                 break;
 685
 686             default:
 687                 block_Release( p_buffer ); /* FIXME: placeholder subs anyone? */
 688                 break;
 689         }
 690     }
 691
 692     vlc_mutex_unlock( &lock );
 693
 694     return VLC_SUCCESS;
 695 }