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 placholder" )
  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, NULL, ID_TEXT, ID_LONGTEXT,
 102                  false )
 103     add_string( SOUT_CFG_PREFIX_OUT "in-name", "default", NULL,
 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, NULL, DELAY_TEXT,
 114                  DELAY_LONGTEXT, false )
 115     add_integer( SOUT_CFG_PREFIX_IN "id-offset", 8192, NULL, ID_OFFSET_TEXT,
 116                  ID_OFFSET_LONGTEXT, false )
 117     add_string( SOUT_CFG_PREFIX_IN "name", "default", NULL,
 118                 NAME_TEXT, NAME_LONGTEXT, false )
 119     add_bool( SOUT_CFG_PREFIX_IN "placeholder", false, NULL,
 120               PLACEHOLDER_TEXT, PLACEHOLDER_LONGTEXT, false )
 121     add_integer( SOUT_CFG_PREFIX_IN "placeholder-delay", 200, NULL,
 122                  PLACEHOLDER_DELAY_TEXT, PLACEHOLDER_DELAY_LONGTEXT, false )
 123     add_bool( SOUT_CFG_PREFIX_IN "placeholder-switch-on-iframe", true, NULL,
 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
 171 /*
 172  * Bridge out
 173  */
 174
 175 typedef struct out_sout_stream_sys_t
 176 {
 177     vlc_mutex_t *p_lock;
 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_Create( p_this->p_libvlc, "bridge-lock", VLC_VAR_MUTEX );
 203     var_Get( p_this->p_libvlc, "bridge-lock", &val );
 204     p_sys->p_lock = val.p_address;
 205
 206     var_Get( p_stream, SOUT_CFG_PREFIX_OUT "id", &val );
 207     p_sys->i_id = val.i_int;
 208
 209     var_Get( p_stream, SOUT_CFG_PREFIX_OUT "in-name", &val );
 210     if( asprintf( &p_sys->psz_name, "bridge-struct-%s", val.psz_string )<0 )
 211     {
 212         free( val.psz_string );
 213         free( p_sys );
 214         return VLC_ENOMEM;
 215     }
 216     free( val.psz_string );
 217
 218     p_stream->pf_add    = AddOut;
 219     p_stream->pf_del    = DelOut;
 220     p_stream->pf_send   = SendOut;
 221
 222     p_stream->p_sys     = (sout_stream_sys_t *)p_sys;
 223
 224     p_stream->p_sout->i_out_pace_nocontrol++;
 225
 226     return VLC_SUCCESS;
 227 }
 228
 229 /*****************************************************************************
 230  * CloseOut:
 231  *****************************************************************************/
 232 static void CloseOut( vlc_object_t * p_this )
 233 {
 234     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 235     out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
 236
 237     p_stream->p_sout->i_out_pace_nocontrol--;
 238
 239     free( p_sys->psz_name );
 240     free( p_sys );
 241 }
 242
 243 static sout_stream_id_t * AddOut( sout_stream_t *p_stream, es_format_t *p_fmt )
 244 {
 245     out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
 246     bridge_t *p_bridge;
 247     bridged_es_t *p_es;
 248     int i;
 249
 250     if ( p_sys->b_inited )
 251     {
 252         msg_Err( p_stream, "bridge-out can only handle 1 es at a time." );
 253         return NULL;
 254     }
 255     p_sys->b_inited = true;
 256
 257     vlc_mutex_lock( p_sys->p_lock );
 258
 259     p_bridge = var_GetAddress( p_stream->p_libvlc, p_sys->psz_name );
 260     if ( p_bridge == NULL )
 261     {
 262         p_bridge = xmalloc( sizeof( bridge_t ) );
 263
 264         var_Create( p_stream->p_libvlc, p_sys->psz_name, VLC_VAR_ADDRESS );
 265         var_SetAddress( p_stream->p_libvlc, p_sys->psz_name, p_bridge );
 266
 267         p_bridge->i_es_num = 0;
 268         p_bridge->pp_es = NULL;
 269     }
 270
 271     for ( i = 0; i < p_bridge->i_es_num; i++ )
 272     {
 273         if ( p_bridge->pp_es[i]->b_empty && !p_bridge->pp_es[i]->b_changed )
 274             break;
 275     }
 276
 277     if ( i == p_bridge->i_es_num )
 278     {
 279         p_bridge->pp_es = xrealloc( p_bridge->pp_es,
 280                           (p_bridge->i_es_num + 1) * sizeof(bridged_es_t *) );
 281         p_bridge->i_es_num++;
 282         p_bridge->pp_es[i] = xmalloc( sizeof(bridged_es_t) );
 283     }
 284
 285     p_sys->p_es = p_es = p_bridge->pp_es[i];
 286
 287     p_es->fmt = *p_fmt;
 288     p_es->fmt.i_id = p_sys->i_id;
 289     p_es->p_block = NULL;
 290     p_es->pp_last = &p_es->p_block;
 291     p_es->b_empty = false;
 292
 293     p_es->id = NULL;
 294     p_es->i_last = VLC_TS_INVALID;
 295     p_es->b_changed = true;
 296
 297     msg_Dbg( p_stream, "bridging out input codec=%4.4s id=%d pos=%d",
 298              (char*)&p_es->fmt.i_codec, p_es->fmt.i_id, i );
 299
 300     vlc_mutex_unlock( p_sys->p_lock );
 301
 302     return (sout_stream_id_t *)p_sys;
 303 }
 304
 305 static int DelOut( sout_stream_t *p_stream, sout_stream_id_t *id )
 306 {
 307     VLC_UNUSED(id);
 308     out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
 309     bridged_es_t *p_es;
 310
 311     if ( !p_sys->b_inited )
 312     {
 313         return VLC_SUCCESS;
 314     }
 315
 316     vlc_mutex_lock( p_sys->p_lock );
 317
 318     p_es = p_sys->p_es;
 319
 320     p_es->b_empty = true;
 321     block_ChainRelease( p_es->p_block );
 322     p_es->p_block = false;
 323
 324     p_es->b_changed = true;
 325     vlc_mutex_unlock( p_sys->p_lock );
 326
 327     p_sys->b_inited = false;
 328
 329     return VLC_SUCCESS;
 330 }
 331
 332 static int SendOut( sout_stream_t *p_stream, sout_stream_id_t *id,
 333                     block_t *p_buffer )
 334 {
 335     out_sout_stream_sys_t *p_sys = (out_sout_stream_sys_t *)p_stream->p_sys;
 336     bridged_es_t *p_es;
 337
 338     if ( (out_sout_stream_sys_t *)id != p_sys )
 339     {
 340         block_ChainRelease( p_buffer );
 341         return VLC_SUCCESS;
 342     }
 343
 344     vlc_mutex_lock( p_sys->p_lock );
 345
 346     p_es = p_sys->p_es;
 347     *p_es->pp_last = p_buffer;
 348     while ( p_buffer != NULL )
 349     {
 350         p_es->pp_last = &p_buffer->p_next;
 351         p_buffer = p_buffer->p_next;
 352     }
 353
 354     vlc_mutex_unlock( p_sys->p_lock );
 355
 356     return VLC_SUCCESS;
 357 }
 358
 359
 360 /*
 361  * Bridge in
 362  */
 363
 364 typedef struct in_sout_stream_sys_t
 365 {
 366     sout_stream_t *p_out;
 367     vlc_mutex_t *p_lock;
 368     int i_id_offset;
 369     mtime_t i_delay;
 370
 371     char *psz_name;
 372
 373     bool b_placeholder;
 374     bool b_switch_on_iframe;
 375     int i_state;
 376     mtime_t i_placeholder_delay;
 377     sout_stream_id_t *id_video;
 378     mtime_t i_last_video;
 379     sout_stream_id_t *id_audio;
 380     mtime_t i_last_audio;
 381 } in_sout_stream_sys_t;
 382
 383 enum { placeholder_on, placeholder_off };
 384
 385 /*****************************************************************************
 386  * OpenIn:
 387  *****************************************************************************/
 388 static int OpenIn( vlc_object_t *p_this )
 389 {
 390     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 391     in_sout_stream_sys_t *p_sys;
 392     vlc_value_t val;
 393
 394     p_sys          = malloc( sizeof( in_sout_stream_sys_t ) );
 395     if( unlikely( !p_sys ) )
 396         return VLC_ENOMEM;
 397
 398     p_sys->p_out = sout_StreamNew( p_stream->p_sout, p_stream->psz_next );
 399     if( !p_sys->p_out )
 400     {
 401         msg_Err( p_stream, "cannot create chain" );
 402         free( p_sys );
 403         return VLC_EGENERIC;
 404     }
 405
 406     config_ChainParse( p_stream, SOUT_CFG_PREFIX_IN, ppsz_sout_options_in,
 407                    p_stream->p_cfg );
 408
 409     var_Create( p_this->p_libvlc, "bridge-lock", VLC_VAR_MUTEX );
 410     var_Get( p_this->p_libvlc, "bridge-lock", &val );
 411     p_sys->p_lock = val.p_address;
 412
 413     var_Get( p_stream, SOUT_CFG_PREFIX_IN "id-offset", &val );
 414     p_sys->i_id_offset = val.i_int;
 415
 416     var_Get( p_stream, SOUT_CFG_PREFIX_IN "delay", &val );
 417     p_sys->i_delay = (mtime_t)val.i_int * 1000;
 418
 419     var_Get( p_stream, SOUT_CFG_PREFIX_IN "name", &val );
 420     if( asprintf( &p_sys->psz_name, "bridge-struct-%s", val.psz_string )<0 )
 421     {
 422         free( val.psz_string );
 423         free( p_sys );
 424         return VLC_ENOMEM;
 425     }
 426     free( val.psz_string );
 427
 428     var_Get( p_stream, SOUT_CFG_PREFIX_IN "placeholder", &val );
 429     p_sys->b_placeholder = val.b_bool;
 430
 431     var_Get( p_stream, SOUT_CFG_PREFIX_IN "placeholder-switch-on-iframe", &val);
 432     p_sys->b_switch_on_iframe = val.b_bool;
 433
 434     p_sys->i_state = placeholder_on;
 435
 436     var_Get( p_stream, SOUT_CFG_PREFIX_IN "placeholder-delay", &val );
 437     p_sys->i_placeholder_delay = (mtime_t)val.i_int * 1000;
 438
 439     p_sys->i_last_video = VLC_TS_INVALID;
 440     p_sys->i_last_audio = VLC_TS_INVALID;
 441     p_sys->id_video = NULL;
 442     p_sys->id_audio = NULL;
 443
 444     p_stream->pf_add    = AddIn;
 445     p_stream->pf_del    = DelIn;
 446     p_stream->pf_send   = SendIn;
 447
 448     p_stream->p_sys     = (sout_stream_sys_t *)p_sys;
 449
 450     /* update p_sout->i_out_pace_nocontrol */
 451     p_stream->p_sout->i_out_pace_nocontrol++;
 452
 453     return VLC_SUCCESS;
 454 }
 455
 456 /*****************************************************************************
 457  * CloseIn:
 458  *****************************************************************************/
 459 static void CloseIn( vlc_object_t * p_this )
 460 {
 461     sout_stream_t     *p_stream = (sout_stream_t*)p_this;
 462     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 463
 464     sout_StreamDelete( p_sys->p_out );
 465     p_stream->p_sout->i_out_pace_nocontrol--;
 466
 467     free( p_sys->psz_name );
 468     free( p_sys );
 469 }
 470
 471 struct sout_stream_id_t
 472 {
 473     sout_stream_id_t *id;
 474     int i_cat; /* es category. Used for placeholder option */
 475 };
 476
 477 static sout_stream_id_t * AddIn( sout_stream_t *p_stream, es_format_t *p_fmt )
 478 {
 479     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 480
 481     sout_stream_id_t *id = malloc( sizeof( sout_stream_id_t ) );
 482     if( !id ) return NULL;
 483
 484     id->id = p_sys->p_out->pf_add( p_sys->p_out, p_fmt );
 485     if( !id->id )
 486     {
 487         free( id );
 488         return NULL;
 489     }
 490
 491     if( p_sys->b_placeholder )
 492     {
 493         id->i_cat = p_fmt->i_cat;
 494         switch( p_fmt->i_cat )
 495         {
 496             case VIDEO_ES:
 497                 if( p_sys->id_video != NULL )
 498                     msg_Err( p_stream, "We already had a video es!" );
 499                 p_sys->id_video = id->id;
 500                 break;
 501             case AUDIO_ES:
 502                 if( p_sys->id_audio != NULL )
 503                     msg_Err( p_stream, "We already had an audio es!" );
 504                 p_sys->id_audio = id->id;
 505                 break;
 506         }
 507     }
 508
 509     return id;
 510 }
 511
 512 static int DelIn( sout_stream_t *p_stream, sout_stream_id_t *id )
 513 {
 514     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 515
 516     if( id == p_sys->id_video ) p_sys->id_video = NULL;
 517     if( id == p_sys->id_audio ) p_sys->id_audio = NULL;
 518
 519     int ret = p_sys->p_out->pf_del( p_sys->p_out, id->id );
 520
 521     free( id );
 522     return ret;
 523 }
 524
 525 static int SendIn( sout_stream_t *p_stream, sout_stream_id_t *id,
 526                    block_t *p_buffer )
 527 {
 528     in_sout_stream_sys_t *p_sys = (in_sout_stream_sys_t *)p_stream->p_sys;
 529     bridge_t *p_bridge;
 530     bool b_no_es = true;
 531     int i;
 532     int i_date = mdate();
 533
 534     /* First forward the packet for our own ES */
 535     if( !p_sys->b_placeholder )
 536         p_sys->p_out->pf_send( p_sys->p_out, id->id, p_buffer );
 537
 538     /* Then check all bridged streams */
 539     vlc_mutex_lock( p_sys->p_lock );
 540
 541     p_bridge = var_GetAddress( p_stream->p_libvlc, p_sys->psz_name );
 542
 543     if( p_bridge )
 544     {
 545     for ( i = 0; i < p_bridge->i_es_num; i++ )
 546     {
 547         if ( !p_bridge->pp_es[i]->b_empty )
 548             b_no_es = false;
 549
 550         while ( p_bridge->pp_es[i]->p_block != NULL
 551                  && (p_bridge->pp_es[i]->p_block->i_dts + p_sys->i_delay
 552                        < i_date
 553                       || p_bridge->pp_es[i]->p_block->i_dts + p_sys->i_delay
 554                           < p_bridge->pp_es[i]->i_last) )
 555         {
 556             block_t *p_block = p_bridge->pp_es[i]->p_block;
 557             msg_Dbg( p_stream, "dropping a packet (%"PRId64 ")",
 558                      i_date - p_block->i_dts - p_sys->i_delay );
 559             p_bridge->pp_es[i]->p_block
 560                 = p_bridge->pp_es[i]->p_block->p_next;
 561             block_Release( p_block );
 562         }
 563
 564         if ( p_bridge->pp_es[i]->p_block == NULL )
 565         {
 566             p_bridge->pp_es[i]->pp_last = &p_bridge->pp_es[i]->p_block;
 567         }
 568
 569         if ( p_bridge->pp_es[i]->b_changed )
 570         {
 571             if ( p_bridge->pp_es[i]->b_empty && p_bridge->pp_es[i]->id != NULL )
 572             {
 573                 p_sys->p_out->pf_del( p_sys->p_out, p_bridge->pp_es[i]->id );
 574             }
 575             else
 576             {
 577                 /* We need at least two packets to enter the mux. */
 578                 if ( p_bridge->pp_es[i]->p_block == NULL
 579                       || p_bridge->pp_es[i]->p_block->p_next == NULL )
 580                 {
 581                     continue;
 582                 }
 583
 584                 p_bridge->pp_es[i]->fmt.i_id += p_sys->i_id_offset;
 585                 if( !p_sys->b_placeholder )
 586                 {
 587                     p_bridge->pp_es[i]->id = p_sys->p_out->pf_add(
 588                                 p_sys->p_out, &p_bridge->pp_es[i]->fmt );
 589                     if ( p_bridge->pp_es[i]->id == NULL )
 590                     {
 591                         msg_Warn( p_stream, "couldn't create chain for id %d",
 592                                   p_bridge->pp_es[i]->fmt.i_id );
 593                     }
 594                 }
 595                 msg_Dbg( p_stream, "bridging in input codec=%4.4s id=%d pos=%d",
 596                          (char*)&p_bridge->pp_es[i]->fmt.i_codec,
 597                          p_bridge->pp_es[i]->fmt.i_id, i );
 598             }
 599         }
 600         p_bridge->pp_es[i]->b_changed = false;
 601
 602         if ( p_bridge->pp_es[i]->b_empty )
 603             continue;
 604
 605         if ( p_bridge->pp_es[i]->p_block == NULL )
 606         {
 607             if ( p_bridge->pp_es[i]->id != NULL
 608                   && p_bridge->pp_es[i]->i_last < i_date )
 609             {
 610                 if( !p_sys->b_placeholder )
 611                     p_sys->p_out->pf_del( p_sys->p_out,
 612                                           p_bridge->pp_es[i]->id );
 613                 p_bridge->pp_es[i]->fmt.i_id -= p_sys->i_id_offset;
 614                 p_bridge->pp_es[i]->b_changed = true;
 615                 p_bridge->pp_es[i]->id = NULL;
 616             }
 617             continue;
 618         }
 619
 620         if ( p_bridge->pp_es[i]->id != NULL || p_sys->b_placeholder)
 621         {
 622             block_t *p_block = p_bridge->pp_es[i]->p_block;
 623             while ( p_block != NULL )
 624             {
 625                 p_bridge->pp_es[i]->i_last = p_block->i_dts;
 626                 p_block->i_pts += p_sys->i_delay;
 627                 p_block->i_dts += p_sys->i_delay;
 628                 p_block = p_block->p_next;
 629             }
 630             sout_stream_id_t *newid = NULL;
 631             if( p_sys->b_placeholder )
 632             {
 633                 switch( p_bridge->pp_es[i]->fmt.i_cat )
 634                 {
 635                     case VIDEO_ES:
 636                         p_sys->i_last_video = i_date;
 637                         newid = p_sys->id_video;
 638                         if( !newid )
 639                             break;
 640                         if( !p_sys->b_switch_on_iframe ||
 641                             p_sys->i_state == placeholder_off ||
 642                             ( p_bridge->pp_es[i]->fmt.i_cat == VIDEO_ES &&
 643                               p_bridge->pp_es[i]->p_block->i_flags & BLOCK_FLAG_TYPE_I ) )
 644                         {
 645                             p_sys->p_out->pf_send( p_sys->p_out,
 646                                        newid,
 647                                        p_bridge->pp_es[i]->p_block );
 648                             p_sys->i_state = placeholder_off;
 649                         }
 650                         break;
 651                     case AUDIO_ES:
 652                         newid = p_sys->id_audio;
 653                         if( !newid )
 654                             break;
 655                         p_sys->i_last_audio = i_date;
 656                     default:
 657                         p_sys->p_out->pf_send( p_sys->p_out,
 658                                    newid?newid:p_bridge->pp_es[i]->id,
 659                                    p_bridge->pp_es[i]->p_block );
 660                         break;
 661                 }
 662             }
 663             else /* !b_placeholder */
 664                 p_sys->p_out->pf_send( p_sys->p_out,
 665                                        p_bridge->pp_es[i]->id,
 666                                        p_bridge->pp_es[i]->p_block );
 667         }
 668         else
 669         {
 670             block_ChainRelease( p_bridge->pp_es[i]->p_block );
 671         }
 672
 673         p_bridge->pp_es[i]->p_block = NULL;
 674         p_bridge->pp_es[i]->pp_last = &p_bridge->pp_es[i]->p_block;
 675     }
 676
 677     if( b_no_es )
 678     {
 679         for ( i = 0; i < p_bridge->i_es_num; i++ )
 680             free( p_bridge->pp_es[i] );
 681         free( p_bridge->pp_es );
 682         free( p_bridge );
 683         var_Destroy( p_stream->p_libvlc, p_sys->psz_name );
 684     }
 685     }
 686
 687     if( p_sys->b_placeholder )
 688     {
 689         switch( id->i_cat )
 690         {
 691             case VIDEO_ES:
 692                 if( ( p_sys->i_last_video + p_sys->i_placeholder_delay < i_date
 693                     && (  !p_sys->b_switch_on_iframe
 694                        || p_buffer->i_flags & BLOCK_FLAG_TYPE_I ) )
 695                   || p_sys->i_state == placeholder_on )
 696                 {
 697                     p_sys->p_out->pf_send( p_sys->p_out, id->id, p_buffer );
 698                     p_sys->i_state = placeholder_on;
 699                 }
 700                 else
 701                     block_Release( p_buffer );
 702                 break;
 703
 704             case AUDIO_ES:
 705                 if( p_sys->i_last_audio + p_sys->i_placeholder_delay < i_date )
 706                     p_sys->p_out->pf_send( p_sys->p_out, id->id, p_buffer );
 707                 else
 708                     block_Release( p_buffer );
 709                 break;
 710
 711             default:
 712                 block_Release( p_buffer ); /* FIXME: placeholder subs anyone? */
 713                 break;
 714         }
 715     }
 716
 717     vlc_mutex_unlock( p_sys->p_lock );
 718
 719     return VLC_SUCCESS;
 720 }