modules/stream_out/bridge.c

   1 /*****************************************************************************
   2  * bridge.c: bridge stream output module
   3  *****************************************************************************
   4  * Copyright (C) 2005-2008 VLC authors and VideoLAN
   5  *
   6  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   7  *          Antoine Cellerier <dionoea at videolan dot org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * 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 <vlc_plugin.h>
  34 #include <vlc_sout.h>
  35 #include <vlc_block.h>
  36
  37 /*****************************************************************************
  38  * Module descriptor
  39  *****************************************************************************/
  40 #define ID_TEXT N_("ID")
  41 #define ID_LONGTEXT N_( \
  42     "Integer identifier for this elementary stream. This will be used to " \
  43     "\"find\" this stream later." )
  44
  45 #define DEST_TEXT N_( "Destination bridge-in name" )
  46 #define DEST_LONGTEXT N_( \
  47     "Name of the destination bridge-in. If you do not need more " \
  48     "than one bridge-in at a time, you can discard this option." )
  49
  50 #define DELAY_TEXT N_("Delay")
  51 #define DELAY_LONGTEXT N_("Pictures coming from the picture video outputs " \
  52         "will be delayed according to this value (in milliseconds, should be "\
  53         ">= 100 ms). For high values, you will need to raise caching values." )
  54
  55 #define ID_OFFSET_TEXT N_("ID Offset")
  56 #define ID_OFFSET_LONGTEXT N_("Offset to add to the stream IDs specified in " \
  57         "bridge_out to obtain the stream IDs bridge_in will register.")
  58
  59 #define NAME_TEXT N_( "Name of current instance" )
  60 #define NAME_LONGTEXT N_( \
  61     "Name of this bridge-in instance. If you do not need more " \
  62     "than one bridge-in at a time, you can discard this option." )
  63
  64 #define PLACEHOLDER_TEXT N_( "Fallback to placeholder stream when out of data" )
  65 #define PLACEHOLDER_LONGTEXT N_( \
  66     "If set to true, the bridge will discard all input elementary streams " \
  67     "except if it doesn't receive data from another bridge-in. This can " \
  68     "be used to configure a place holder stream when the real source " \
  69     "breaks. Source and placeholder streams should have the same format." )
  70
  71 #define PLACEHOLDER_DELAY_TEXT N_( "Placeholder delay" )
  72 #define PLACEHOLDER_DELAY_LONGTEXT N_( \
  73     "Delay (in ms) before the placeholder kicks in." )
  74
  75 #define PLACEHOLDER_IFRAME_TEXT N_( "Wait for I frame before toggling placeholder" )
  76 #define PLACEHOLDER_IFRAME_LONGTEXT N_( \
  77     "If enabled, switching between the placeholder and the normal stream " \
  78     "will only occur on I frames. This will remove artifacts on stream " \
  79     "switching at the expense of a slightly longer delay, depending on " \
  80     "the frequence of I frames in the streams." )
  81
  82 static int  OpenOut ( vlc_object_t * );
  83 static void CloseOut( vlc_object_t * );
  84 static int  OpenIn  ( vlc_object_t * );
  85 static void CloseIn ( vlc_object_t * );
  86
  87 #define SOUT_CFG_PREFIX_OUT "sout-bridge-out-"
  88 #define SOUT_CFG_PREFIX_IN "sout-bridge-in-"
  89
  90 vlc_module_begin ()
  91     set_shortname( N_("Bridge"))
  92     set_description( N_("Bridge stream output"))
  93     add_submodule ()
  94     set_section( N_("Bridge out"), NULL )
  95     set_capability( "sout output", 50 )
  96     add_shortcut( "bridge-out" )
  97     /* Only usable with VLM. No category so not in gui preferences
  98     set_category( CAT_SOUT )
  99     set_subcategory( SUBCAT_SOUT_STREAM )*/
 100     add_integer( SOUT_CFG_PREFIX_OUT "id", 0, ID_TEXT, ID_LONGTEXT,
 101                  false )
 102     add_string( SOUT_CFG_PREFIX_OUT "in-name", "default",
 103                 DEST_TEXT, DEST_LONGTEXT, false )
 104     set_callbacks( OpenOut, CloseOut )
 105
 106     add_submodule ()
 107     set_section( N_("Bridge in"), NULL )
 108     set_capability( "sout filter", 50 )
 109     add_shortcut( "bridge-in" )
 110     /*set_category( CAT_SOUT )
 111     set_subcategory( SUBCAT_SOUT_STREAM )*/
 112     add_integer( SOUT_CFG_PREFIX_IN "delay", 0, DELAY_TEXT,
 113                  DELAY_LONGTEXT, false )
 114     add_integer( SOUT_CFG_PREFIX_IN "id-offset", 8192, ID_OFFSET_TEXT,
 115                  ID_OFFSET_LONGTEXT, false )
 116     add_string( SOUT_CFG_PREFIX_IN "name", "default",
 117                 NAME_TEXT, NAME_LONGTEXT, false )
 118     add_bool( SOUT_CFG_PREFIX_IN "placeholder", false,
 119               PLACEHOLDER_TEXT, PLACEHOLDER_LONGTEXT, false )
 120     add_integer( SOUT_CFG_PREFIX_IN "placeholder-delay", 200,
 121                  PLACEHOLDER_DELAY_TEXT, PLACEHOLDER_DELAY_LONGTEXT, false )
 122     add_bool( SOUT_CFG_PREFIX_IN "placeholder-switch-on-iframe", true,
 123               PLACEHOLDER_IFRAME_TEXT, PLACEHOLDER_IFRAME_LONGTEXT, false )
 124     set_callbacks( OpenIn, CloseIn )
 125
 126 vlc_module_end ()
 127
 128
 129 /*****************************************************************************
 130  * Local prototypes
 131  *****************************************************************************/
 132 static const char *const ppsz_sout_options_out[] = {
 133     "id", "in-name", NULL
 134 };
 135
 136 static const char *const ppsz_sout_options_in[] = {
 137     "delay", "id-offset", "name",
 138     "placeholder", "placeholder-delay", "placeholder-switch-on-iframe",
 139     NULL
 140 };
 141
 142 static void *AddOut( sout_stream_t *, const es_format_t * );
 143 static void  DelOut( sout_stream_t *, void * );
 144 static int   SendOut( sout_stream_t *, void *, block_t * );
 145
 146 static void *AddIn( sout_stream_t *, const es_format_t * );
 147 static void  DelIn( sout_stream_t *, void * );
 148 static int   SendIn( sout_stream_t *, void *, block_t * );
 149
 150 typedef struct sout_stream_id_sys_t sout_stream_id_sys_t;
 151
 152 typedef struct bridged_es_t
 153 {
 154     es_format_t fmt;
 155     block_t *p_block;
 156     block_t **pp_last;
 157     bool b_empty;
 158
 159     /* bridge in part */
 160     sout_stream_id_sys_t *id;
 161     vlc_tick_t i_last;
 162     bool b_changed;
 163 } bridged_es_t;
 164
 165 typedef struct bridge_t
 166 {
 167     bridged_es_t **pp_es;
 168     int i_es_num;
 169 } bridge_t;
 170
 171 static vlc_mutex_t lock = VLC_STATIC_MUTEX;
 172
 173 /*
 174  * Bridge out
 175  */
 176
 177 typedef struct out_sout_stream_sys_t
 178 {
 179     bridged_es_t *p_es;
 180     int i_id;
 181     bool b_inited;
 182
 183     char *psz_name;
 184 } out_sout_stream_sys_t;
 185
 186 /*****************************************************************************
 187  * OpenOut:
 188  *****************************************************************************/
 189 static int OpenOut( vlc_object_t *p_this )
 190 {
 191     sout_stream_t     *p_stream = (sout_stream_t *)p_this;
 192     out_sout_stream_sys_t *p_sys;
 193     vlc_value_t val;
 194
 195     config_ChainParse( p_stream, SOUT_CFG_PREFIX_OUT, ppsz_sout_options_out,
 196                    p_stream->p_cfg );
 197
 198     p_sys          = malloc( sizeof( out_sout_stream_sys_t ) );
 199     if( unlikely( !p_sys ) )
 200         return VLC_ENOMEM;
 201     p_sys->b_inited = false;
 202
 203     var_Get( p_stream, SOUT_CFG_PREFIX_OUT "id", &val );
 204     p_sys->i_id = val.i_int;
 205
 206     var_Get( p_stream, SOUT_CFG_PREFIX_OUT "in-name", &val );
 207     if( asprintf( &p_sys->psz_name, "bridge-struct-%s", val.psz_string )<0 )
 208     {
 209         free( val.psz_string );
 210         free( p_sys );
 211         return VLC_ENOMEM;
 212     }
 213     free( val.psz_string );
 214
 215     p_stream->pf_add    = AddOut;
 216     p_stream->pf_del    = DelOut;
 217     p_stream->pf_send   = SendOut;
 218
 219     p_stream->p_sys     = p_sys;
 220     p_stream->pace_nocontrol = true;
 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     free( p_sys->psz_name );
 234     free( p_sys );
 235 }
 236
 237 static void *AddOut( sout_stream_t *p_stream, const es_format_t *p_fmt )
 238 {
 239     vlc_object_t *vlc = VLC_OBJECT(vlc_object_instance(p_stream));
 240     out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
 241     bridge_t *p_bridge;
 242     bridged_es_t *p_es;
 243     int i;
 244
 245     if ( p_sys->b_inited )
 246     {
 247         msg_Err( p_stream, "bridge-out can only handle 1 es at a time." );
 248         return NULL;
 249     }
 250     p_sys->b_inited = true;
 251
 252     vlc_mutex_lock( &lock );
 253
 254     p_bridge = var_GetAddress( vlc, p_sys->psz_name );
 255     if ( p_bridge == NULL )
 256     {
 257         p_bridge = xmalloc( sizeof( bridge_t ) );
 258
 259         var_Create( vlc, p_sys->psz_name, VLC_VAR_ADDRESS );
 260         var_SetAddress( vlc, p_sys->psz_name, p_bridge );
 261
 262         p_bridge->i_es_num = 0;
 263         p_bridge->pp_es = NULL;
 264     }
 265
 266     for ( i = 0; i < p_bridge->i_es_num; i++ )
 267     {
 268         if ( p_bridge->pp_es[i]->b_empty && !p_bridge->pp_es[i]->b_changed )
 269             break;
 270     }
 271
 272     if ( i == p_bridge->i_es_num )
 273     {
 274         p_bridge->pp_es = xrealloc( p_bridge->pp_es,
 275                           (p_bridge->i_es_num + 1) * sizeof(bridged_es_t *) );
 276         p_bridge->i_es_num++;
 277         p_bridge->pp_es[i] = xmalloc( sizeof(bridged_es_t) );
 278     }
 279
 280     p_sys->p_es = p_es = p_bridge->pp_es[i];
 281
 282     p_es->fmt = *p_fmt;
 283     p_es->fmt.i_id = p_sys->i_id;
 284     p_es->p_block = NULL;
 285     p_es->pp_last = &p_es->p_block;
 286     p_es->b_empty = false;
 287
 288     p_es->id = NULL;
 289     p_es->i_last = VLC_TICK_INVALID;
 290     p_es->b_changed = true;
 291
 292     msg_Dbg( p_stream, "bridging out input codec=%4.4s id=%d pos=%d",
 293              (char*)&p_es->fmt.i_codec, p_es->fmt.i_id, i );
 294
 295     vlc_mutex_unlock( &lock );
 296
 297     return p_sys;
 298 }
 299
 300 static void DelOut( sout_stream_t *p_stream, void *id )
 301 {
 302     VLC_UNUSED(id);
 303     out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
 304     bridged_es_t *p_es;
 305
 306     if ( !p_sys->b_inited )
 307         return;
 308
 309     vlc_mutex_lock( &lock );
 310
 311     p_es = p_sys->p_es;
 312
 313     p_es->b_empty = true;
 314     block_ChainRelease( p_es->p_block );
 315     p_es->p_block = NULL;
 316
 317     p_es->b_changed = true;
 318     vlc_mutex_unlock( &lock );
 319
 320     p_sys->b_inited = false;
 321 }
 322
 323 static int SendOut( sout_stream_t *p_stream, void *id, block_t *p_buffer )
 324 {
 325     out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
 326     bridged_es_t *p_es;
 327
 328     if ( (out_sout_stream_sys_t *)id != p_sys )
 329     {
 330         block_ChainRelease( p_buffer );
 331         return VLC_SUCCESS;
 332     }
 333
 334     vlc_mutex_lock( &lock );
 335
 336     p_es = p_sys->p_es;
 337     *p_es->pp_last = p_buffer;
 338     while ( p_buffer != NULL )
 339     {
 340         p_es->pp_last = &p_buffer->p_next;
 341         p_buffer = p_buffer->p_next;
 342     }
 343
 344     vlc_mutex_unlock( &lock );
 345
 346     return VLC_SUCCESS;
 347 }
 348
 349
 350 /*
 351  * Bridge in
 352  */
 353
 354 typedef struct in_sout_stream_sys_t
 355 {
 356     int i_id_offset;
 357     vlc_tick_t i_delay;
 358
 359     char *psz_name;
 360
 361     bool b_placeholder;
 362     bool b_switch_on_iframe;
 363     int i_state;
 364     vlc_tick_t i_placeholder_delay;
 365     sout_stream_id_sys_t *id_video;
 366     vlc_tick_t i_last_video;
 367     sout_stream_id_sys_t *id_audio;
 368     vlc_tick_t i_last_audio;
 369 } in_sout_stream_sys_t;
 370
 371 enum { placeholder_on, placeholder_off };
 372
 373 /*****************************************************************************
 374  * OpenIn:
 375  *****************************************************************************/
 376 static int OpenIn( vlc_object_t *p_this )
 377 {
 378     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 379     in_sout_stream_sys_t *p_sys;
 380     vlc_value_t val;
 381
 382     p_sys          = malloc( sizeof( in_sout_stream_sys_t ) );
 383     if( unlikely( !p_sys ) )
 384         return VLC_ENOMEM;
 385
 386     config_ChainParse( p_stream, SOUT_CFG_PREFIX_IN, ppsz_sout_options_in,
 387                    p_stream->p_cfg );
 388
 389     var_Get( p_stream, SOUT_CFG_PREFIX_IN "id-offset", &val );
 390     p_sys->i_id_offset = val.i_int;
 391
 392     var_Get( p_stream, SOUT_CFG_PREFIX_IN "delay", &val );
 393     p_sys->i_delay = VLC_TICK_FROM_MS(val.i_int);
 394
 395     var_Get( p_stream, SOUT_CFG_PREFIX_IN "name", &val );
 396     if( asprintf( &p_sys->psz_name, "bridge-struct-%s", val.psz_string )<0 )
 397     {
 398         free( val.psz_string );
 399         free( p_sys );
 400         return VLC_ENOMEM;
 401     }
 402     free( val.psz_string );
 403
 404     var_Get( p_stream, SOUT_CFG_PREFIX_IN "placeholder", &val );
 405     p_sys->b_placeholder = val.b_bool;
 406
 407     var_Get( p_stream, SOUT_CFG_PREFIX_IN "placeholder-switch-on-iframe", &val);
 408     p_sys->b_switch_on_iframe = val.b_bool;
 409
 410     p_sys->i_state = placeholder_on;
 411
 412     var_Get( p_stream, SOUT_CFG_PREFIX_IN "placeholder-delay", &val );
 413     p_sys->i_placeholder_delay = VLC_TICK_FROM_MS(val.i_int);
 414
 415     p_sys->i_last_video = VLC_TICK_INVALID;
 416     p_sys->i_last_audio = VLC_TICK_INVALID;
 417     p_sys->id_video = NULL;
 418     p_sys->id_audio = NULL;
 419
 420     p_stream->pf_add    = AddIn;
 421     p_stream->pf_del    = DelIn;
 422     p_stream->pf_send   = SendIn;
 423
 424     p_stream->p_sys     = p_sys;
 425     p_stream->pace_nocontrol = true;
 426
 427     return VLC_SUCCESS;
 428 }
 429
 430 /*****************************************************************************
 431  * CloseIn:
 432  *****************************************************************************/
 433 static void CloseIn( vlc_object_t * p_this )
 434 {
 435     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 436     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 437
 438     free( p_sys->psz_name );
 439     free( p_sys );
 440 }
 441
 442 struct sout_stream_id_sys_t
 443 {
 444     sout_stream_id_sys_t *id;
 445     enum es_format_category_e i_cat; /* es category. Used for placeholder option */
 446 };
 447
 448 static void* AddIn( sout_stream_t *p_stream, const es_format_t *p_fmt )
 449 {
 450     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 451
 452     sout_stream_id_sys_t *id = malloc( sizeof( sout_stream_id_sys_t ) );
 453     if( !id ) return NULL;
 454
 455     id->id = sout_StreamIdAdd( p_stream->p_next, p_fmt );
 456     if( !id->id )
 457     {
 458         free( id );
 459         return NULL;
 460     }
 461
 462     if( p_sys->b_placeholder )
 463     {
 464         id->i_cat = p_fmt->i_cat;
 465         switch( p_fmt->i_cat )
 466         {
 467             case VIDEO_ES:
 468                 if( p_sys->id_video != NULL )
 469                     msg_Err( p_stream, "We already had a video es!" );
 470                 p_sys->id_video = id->id;
 471                 break;
 472             case AUDIO_ES:
 473                 if( p_sys->id_audio != NULL )
 474                     msg_Err( p_stream, "We already had an audio es!" );
 475                 p_sys->id_audio = id->id;
 476                 break;
 477             default:
 478                 break;
 479         }
 480     }
 481
 482     return id;
 483 }
 484
 485 static void DelIn( sout_stream_t *p_stream, void *_id )
 486 {
 487     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 488     sout_stream_id_sys_t *id = (sout_stream_id_sys_t *)_id;
 489
 490     if( id == p_sys->id_video ) p_sys->id_video = NULL;
 491     if( id == p_sys->id_audio ) p_sys->id_audio = NULL;
 492
 493     sout_StreamIdDel( p_stream->p_next, id->id );
 494     free( id );
 495 }
 496
 497 static int SendIn( sout_stream_t *p_stream, void *_id, block_t *p_buffer )
 498 {
 499     vlc_object_t *vlc = VLC_OBJECT(vlc_object_instance(p_stream));
 500     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 501     sout_stream_id_sys_t *id = (sout_stream_id_sys_t *)_id;
 502     bridge_t *p_bridge;
 503     bool b_no_es = true;
 504     int i;
 505     vlc_tick_t i_date = vlc_tick_now();
 506
 507     /* First forward the packet for our own ES */
 508     if( !p_sys->b_placeholder )
 509         sout_StreamIdSend( p_stream->p_next, id->id, p_buffer );
 510
 511     /* Then check all bridged streams */
 512     vlc_mutex_lock( &lock );
 513
 514     p_bridge = var_GetAddress( vlc, p_sys->psz_name );
 515
 516     if( p_bridge )
 517     {
 518     for ( i = 0; i < p_bridge->i_es_num; i++ )
 519     {
 520         if ( !p_bridge->pp_es[i]->b_empty )
 521             b_no_es = false;
 522
 523         while ( p_bridge->pp_es[i]->p_block != NULL
 524                  && (p_bridge->pp_es[i]->p_block->i_dts + p_sys->i_delay
 525                        < i_date
 526                       || p_bridge->pp_es[i]->p_block->i_dts + p_sys->i_delay
 527                           < p_bridge->pp_es[i]->i_last) )
 528         {
 529             block_t *p_block = p_bridge->pp_es[i]->p_block;
 530             msg_Dbg( p_stream, "dropping a packet (%"PRId64 ")",
 531                      i_date - p_block->i_dts - p_sys->i_delay );
 532             p_bridge->pp_es[i]->p_block
 533                 = p_bridge->pp_es[i]->p_block->p_next;
 534             block_Release( p_block );
 535         }
 536
 537         if ( p_bridge->pp_es[i]->p_block == NULL )
 538         {
 539             p_bridge->pp_es[i]->pp_last = &p_bridge->pp_es[i]->p_block;
 540         }
 541
 542         if ( p_bridge->pp_es[i]->b_changed )
 543         {
 544             if ( p_bridge->pp_es[i]->b_empty && p_bridge->pp_es[i]->id != NULL )
 545             {
 546                 sout_StreamIdDel( p_stream->p_next, p_bridge->pp_es[i]->id );
 547             }
 548             else
 549             {
 550                 /* We need at least two packets to enter the mux. */
 551                 if ( p_bridge->pp_es[i]->p_block == NULL
 552                       || p_bridge->pp_es[i]->p_block->p_next == NULL )
 553                 {
 554                     continue;
 555                 }
 556
 557                 p_bridge->pp_es[i]->fmt.i_id += p_sys->i_id_offset;
 558                 if( !p_sys->b_placeholder )
 559                 {
 560                     p_bridge->pp_es[i]->id = sout_StreamIdAdd(
 561                                 p_stream->p_next, &p_bridge->pp_es[i]->fmt );
 562                     if ( p_bridge->pp_es[i]->id == NULL )
 563                     {
 564                         msg_Warn( p_stream, "couldn't create chain for id %d",
 565                                   p_bridge->pp_es[i]->fmt.i_id );
 566                     }
 567                 }
 568                 msg_Dbg( p_stream, "bridging in input codec=%4.4s id=%d pos=%d",
 569                          (char*)&p_bridge->pp_es[i]->fmt.i_codec,
 570                          p_bridge->pp_es[i]->fmt.i_id, i );
 571             }
 572         }
 573         p_bridge->pp_es[i]->b_changed = false;
 574
 575         if ( p_bridge->pp_es[i]->b_empty )
 576             continue;
 577
 578         if ( p_bridge->pp_es[i]->p_block == NULL )
 579         {
 580             if ( p_bridge->pp_es[i]->id != NULL
 581                   && p_bridge->pp_es[i]->i_last < i_date )
 582             {
 583                 if( !p_sys->b_placeholder )
 584                     sout_StreamIdDel( p_stream->p_next, p_bridge->pp_es[i]->id );
 585                 p_bridge->pp_es[i]->fmt.i_id -= p_sys->i_id_offset;
 586                 p_bridge->pp_es[i]->b_changed = true;
 587                 p_bridge->pp_es[i]->id = NULL;
 588             }
 589             continue;
 590         }
 591
 592         if ( p_bridge->pp_es[i]->id != NULL || p_sys->b_placeholder)
 593         {
 594             block_t *p_block = p_bridge->pp_es[i]->p_block;
 595             while ( p_block != NULL )
 596             {
 597                 p_bridge->pp_es[i]->i_last = p_block->i_dts;
 598                 p_block->i_pts += p_sys->i_delay;
 599                 p_block->i_dts += p_sys->i_delay;
 600                 p_block = p_block->p_next;
 601             }
 602             sout_stream_id_sys_t *newid = NULL;
 603             if( p_sys->b_placeholder )
 604             {
 605                 switch( p_bridge->pp_es[i]->fmt.i_cat )
 606                 {
 607                     case VIDEO_ES:
 608                         p_sys->i_last_video = i_date;
 609                         newid = p_sys->id_video;
 610                         if( !newid )
 611                             break;
 612                         if( !p_sys->b_switch_on_iframe ||
 613                             p_sys->i_state == placeholder_off ||
 614                             ( p_bridge->pp_es[i]->fmt.i_cat == VIDEO_ES &&
 615                               p_bridge->pp_es[i]->p_block->i_flags & BLOCK_FLAG_TYPE_I ) )
 616                         {
 617                             sout_StreamIdSend( p_stream->p_next,
 618                                        newid,
 619                                        p_bridge->pp_es[i]->p_block );
 620                             p_sys->i_state = placeholder_off;
 621                         }
 622                         break;
 623                     case AUDIO_ES:
 624                         newid = p_sys->id_audio;
 625                         if( !newid )
 626                             break;
 627                         p_sys->i_last_audio = i_date;
 628                         /* fall through */
 629                     default:
 630                         sout_StreamIdSend( p_stream->p_next,
 631                                    newid?newid:p_bridge->pp_es[i]->id,
 632                                    p_bridge->pp_es[i]->p_block );
 633                         break;
 634                 }
 635             }
 636             else /* !b_placeholder */
 637                 sout_StreamIdSend( p_stream->p_next,
 638                                        p_bridge->pp_es[i]->id,
 639                                        p_bridge->pp_es[i]->p_block );
 640         }
 641         else
 642         {
 643             block_ChainRelease( p_bridge->pp_es[i]->p_block );
 644         }
 645
 646         p_bridge->pp_es[i]->p_block = NULL;
 647         p_bridge->pp_es[i]->pp_last = &p_bridge->pp_es[i]->p_block;
 648     }
 649
 650     if( b_no_es )
 651     {
 652         for ( i = 0; i < p_bridge->i_es_num; i++ )
 653             free( p_bridge->pp_es[i] );
 654         free( p_bridge->pp_es );
 655         free( p_bridge );
 656         var_Destroy( vlc, p_sys->psz_name );
 657     }
 658     }
 659
 660     if( p_sys->b_placeholder )
 661     {
 662         switch( id->i_cat )
 663         {
 664             case VIDEO_ES:
 665                 if( ( p_sys->i_last_video + p_sys->i_placeholder_delay < i_date
 666                     && (  !p_sys->b_switch_on_iframe
 667                        || p_buffer->i_flags & BLOCK_FLAG_TYPE_I ) )
 668                   || p_sys->i_state == placeholder_on )
 669                 {
 670                     sout_StreamIdSend( p_stream->p_next, id->id, p_buffer );
 671                     p_sys->i_state = placeholder_on;
 672                 }
 673                 else
 674                     block_Release( p_buffer );
 675                 break;
 676
 677             case AUDIO_ES:
 678                 if( p_sys->i_last_audio + p_sys->i_placeholder_delay < i_date )
 679                     sout_StreamIdSend( p_stream->p_next, id->id, p_buffer );
 680                 else
 681                     block_Release( p_buffer );
 682                 break;
 683
 684             default:
 685                 block_Release( p_buffer ); /* FIXME: placeholder subs anyone? */
 686                 break;
 687         }
 688     }
 689
 690     vlc_mutex_unlock( &lock );
 691
 692     return VLC_SUCCESS;
 693 }