src/stream_output/stream_output.c

   1 /*****************************************************************************
   2  * stream_output.c : stream output module
   3  *****************************************************************************
   4  * Copyright (C) 2002-2007 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   8  *          Laurent Aimar <fenrir@via.ecp.fr>
   9  *          Eric Petit <titer@videolan.org>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  24  *****************************************************************************/
  25
  26 /*****************************************************************************
  27  * Preamble
  28  *****************************************************************************/
  29
  30 #ifdef HAVE_CONFIG_H
  31 # include "config.h"
  32 #endif
  33
  34 #include <assert.h>
  35
  36 #include <vlc_common.h>
  37
  38 #include <stdlib.h>                                                /* free() */
  39 #include <stdio.h>                                              /* sprintf() */
  40 #include <string.h>
  41
  42 #include <vlc_sout.h>
  43
  44 #include "stream_output.h"
  45
  46 #include <vlc_meta.h>
  47 #include <vlc_block.h>
  48 #include <vlc_codec.h>
  49
  50 #include "input/input_interface.h"
  51
  52 #define VLC_CODEC_NULL VLC_FOURCC( 'n', 'u', 'l', 'l' )
  53
  54 #undef DEBUG_BUFFER
  55 /*****************************************************************************
  56  * Local prototypes
  57  *****************************************************************************/
  58 static char *sout_stream_url_to_chain( bool, const char * );
  59
  60 /*
  61  * Generic MRL parser
  62  *
  63  */
  64
  65 typedef struct
  66 {
  67     char *psz_access;
  68     char *psz_way;
  69     char *psz_name;
  70 } mrl_t;
  71
  72 /* mrl_Parse: parse psz_mrl and fill p_mrl */
  73 static int  mrl_Parse( mrl_t *p_mrl, const char *psz_mrl );
  74 /* mrl_Clean: clean p_mrl  after a call to mrl_Parse */
  75 static void mrl_Clean( mrl_t *p_mrl );
  76
  77 /*****************************************************************************
  78  * sout_NewInstance: creates a new stream output instance
  79  *****************************************************************************/
  80 sout_instance_t *__sout_NewInstance( vlc_object_t *p_parent, const char *psz_dest )
  81 {
  82     static const char typename[] = "stream output";
  83     sout_instance_t *p_sout;
  84
  85     char *psz_chain;
  86     if( psz_dest && psz_dest[0] == '#' )
  87     {
  88         psz_chain = strdup( &psz_dest[1] );
  89     }
  90     else
  91     {
  92         psz_chain = sout_stream_url_to_chain(
  93             var_InheritBool(p_parent, "sout-display"), psz_dest );
  94     }
  95     if(!psz_chain)
  96         return NULL;
  97
  98     /* *** Allocate descriptor *** */
  99     p_sout = vlc_custom_create( p_parent, sizeof( *p_sout ),
 100                                 VLC_OBJECT_GENERIC, typename );
 101     if( p_sout == NULL )
 102         return NULL;
 103
 104     msg_Dbg( p_sout, "using sout chain=`%s'", psz_chain );
 105
 106     /* *** init descriptor *** */
 107     p_sout->psz_sout    = strdup( psz_dest );
 108     p_sout->p_meta      = NULL;
 109     p_sout->i_out_pace_nocontrol = 0;
 110     p_sout->p_sys       = NULL;
 111
 112     vlc_mutex_init( &p_sout->lock );
 113     p_sout->p_stream = NULL;
 114
 115     /* attach it for inherit */
 116     vlc_object_attach( p_sout, p_parent );
 117
 118     var_Create( p_sout, "sout-mux-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 119
 120     p_sout->p_stream = sout_StreamChainNew( p_sout, psz_chain, NULL, NULL );
 121     if( p_sout->p_stream )
 122     {
 123         free( psz_chain );
 124         return p_sout;
 125     }
 126
 127     msg_Err( p_sout, "stream chain failed for `%s'", psz_chain );
 128     free( psz_chain );
 129
 130     FREENULL( p_sout->psz_sout );
 131
 132     vlc_object_release( p_sout );
 133     return NULL;
 134 }
 135
 136 /*****************************************************************************
 137  * sout_DeleteInstance: delete a previously allocated instance
 138  *****************************************************************************/
 139 void sout_DeleteInstance( sout_instance_t * p_sout )
 140 {
 141     /* remove the stream out chain */
 142     sout_StreamChainDelete( p_sout->p_stream, NULL );
 143
 144     /* *** free all string *** */
 145     FREENULL( p_sout->psz_sout );
 146
 147     /* delete meta */
 148     if( p_sout->p_meta )
 149     {
 150         vlc_meta_Delete( p_sout->p_meta );
 151     }
 152
 153     vlc_mutex_destroy( &p_sout->lock );
 154
 155     /* *** free structure *** */
 156     vlc_object_release( p_sout );
 157 }
 158
 159 /*****************************************************************************
 160  *
 161  *****************************************************************************/
 162 void sout_UpdateStatistic( sout_instance_t *p_sout, sout_statistic_t i_type, int i_delta )
 163 {
 164     if( !libvlc_stats( p_sout ) )
 165         return;
 166
 167     /* */
 168     input_thread_t *p_input = vlc_object_find( p_sout, VLC_OBJECT_INPUT, FIND_PARENT );
 169     if( !p_input )
 170         return;
 171
 172     int i_input_type;
 173     switch( i_type )
 174     {
 175     case SOUT_STATISTIC_DECODED_VIDEO:
 176         i_input_type = SOUT_STATISTIC_DECODED_VIDEO;
 177         break;
 178     case SOUT_STATISTIC_DECODED_AUDIO:
 179         i_input_type = SOUT_STATISTIC_DECODED_AUDIO;
 180         break;
 181     case SOUT_STATISTIC_DECODED_SUBTITLE:
 182         i_input_type = SOUT_STATISTIC_DECODED_SUBTITLE;
 183         break;
 184
 185     case SOUT_STATISTIC_SENT_PACKET:
 186         i_input_type = SOUT_STATISTIC_SENT_PACKET;
 187         break;
 188
 189     case SOUT_STATISTIC_SENT_BYTE:
 190         i_input_type = SOUT_STATISTIC_SENT_BYTE;
 191         break;
 192
 193     default:
 194         msg_Err( p_sout, "Not yet supported statistic type %d", i_type );
 195         vlc_object_release( p_input );
 196         return;
 197     }
 198
 199     input_UpdateStatistic( p_input, i_input_type, i_delta );
 200
 201     vlc_object_release( p_input );
 202 }
 203 /*****************************************************************************
 204  * Packetizer/Input
 205  *****************************************************************************/
 206 sout_packetizer_input_t *sout_InputNew( sout_instance_t *p_sout,
 207                                         es_format_t *p_fmt )
 208 {
 209     sout_packetizer_input_t *p_input;
 210
 211     /* *** create a packetizer input *** */
 212     p_input         = malloc( sizeof( sout_packetizer_input_t ) );
 213     if( !p_input )  return NULL;
 214     p_input->p_sout = p_sout;
 215     p_input->p_fmt  = p_fmt;
 216
 217     msg_Dbg( p_sout, "adding a new sout input (sout_input:%p)", p_input );
 218
 219     if( p_fmt->i_codec == VLC_CODEC_NULL )
 220     {
 221         vlc_object_release( p_sout );
 222         return p_input;
 223     }
 224
 225     /* *** add it to the stream chain */
 226     vlc_mutex_lock( &p_sout->lock );
 227     p_input->id = p_sout->p_stream->pf_add( p_sout->p_stream, p_fmt );
 228     vlc_mutex_unlock( &p_sout->lock );
 229
 230     if( p_input->id == NULL )
 231     {
 232         free( p_input );
 233         return NULL;
 234     }
 235
 236     return( p_input );
 237 }
 238
 239 /*****************************************************************************
 240  *
 241  *****************************************************************************/
 242 int sout_InputDelete( sout_packetizer_input_t *p_input )
 243 {
 244     sout_instance_t     *p_sout = p_input->p_sout;
 245
 246     msg_Dbg( p_sout, "removing a sout input (sout_input:%p)", p_input );
 247
 248     if( p_input->p_fmt->i_codec != VLC_CODEC_NULL )
 249     {
 250         vlc_mutex_lock( &p_sout->lock );
 251         p_sout->p_stream->pf_del( p_sout->p_stream, p_input->id );
 252         vlc_mutex_unlock( &p_sout->lock );
 253     }
 254
 255     free( p_input );
 256
 257     return( VLC_SUCCESS);
 258 }
 259
 260 /*****************************************************************************
 261  *
 262  *****************************************************************************/
 263 int sout_InputSendBuffer( sout_packetizer_input_t *p_input,
 264                           block_t *p_buffer )
 265 {
 266     sout_instance_t     *p_sout = p_input->p_sout;
 267     int                 i_ret;
 268
 269     if( p_input->p_fmt->i_codec == VLC_CODEC_NULL )
 270     {
 271         block_Release( p_buffer );
 272         return VLC_SUCCESS;
 273     }
 274
 275     if( p_buffer->i_dts <= VLC_TS_INVALID )
 276     {
 277         msg_Warn( p_sout, "trying to send non-dated packet to stream output!");
 278         block_Release( p_buffer );
 279         return VLC_SUCCESS;
 280     }
 281
 282     vlc_mutex_lock( &p_sout->lock );
 283     i_ret = p_sout->p_stream->pf_send( p_sout->p_stream,
 284                                        p_input->id, p_buffer );
 285     vlc_mutex_unlock( &p_sout->lock );
 286
 287     return i_ret;
 288 }
 289
 290 #undef sout_AccessOutNew
 291 /*****************************************************************************
 292  * sout_AccessOutNew: allocate a new access out
 293  *****************************************************************************/
 294 sout_access_out_t *sout_AccessOutNew( vlc_object_t *p_sout,
 295                                       const char *psz_access, const char *psz_name )
 296 {
 297     static const char typename[] = "access out";
 298     sout_access_out_t *p_access;
 299     char              *psz_next;
 300
 301     p_access = vlc_custom_create( p_sout, sizeof( *p_access ),
 302                                   VLC_OBJECT_GENERIC, typename );
 303     if( !p_access )
 304         return NULL;
 305
 306     psz_next = config_ChainCreate( &p_access->psz_access, &p_access->p_cfg,
 307                                    psz_access );
 308     free( psz_next );
 309     p_access->psz_path   = strdup( psz_name ? psz_name : "" );
 310     p_access->p_sys      = NULL;
 311     p_access->pf_seek    = NULL;
 312     p_access->pf_read    = NULL;
 313     p_access->pf_write   = NULL;
 314     p_access->pf_control = NULL;
 315     p_access->p_module   = NULL;
 316
 317     p_access->i_writes = 0;
 318     p_access->i_sent_bytes = 0;
 319
 320     vlc_object_attach( p_access, p_sout );
 321
 322     p_access->p_module   =
 323         module_need( p_access, "sout access", p_access->psz_access, true );
 324
 325     if( !p_access->p_module )
 326     {
 327         free( p_access->psz_access );
 328         free( p_access->psz_path );
 329         vlc_object_release( p_access );
 330         return( NULL );
 331     }
 332
 333     return p_access;
 334 }
 335 /*****************************************************************************
 336  * sout_AccessDelete: delete an access out
 337  *****************************************************************************/
 338 void sout_AccessOutDelete( sout_access_out_t *p_access )
 339 {
 340     if( p_access->p_module )
 341     {
 342         module_unneed( p_access, p_access->p_module );
 343     }
 344     free( p_access->psz_access );
 345
 346     config_ChainDestroy( p_access->p_cfg );
 347
 348     free( p_access->psz_path );
 349
 350     vlc_object_release( p_access );
 351 }
 352
 353 /*****************************************************************************
 354  * sout_AccessSeek:
 355  *****************************************************************************/
 356 int sout_AccessOutSeek( sout_access_out_t *p_access, off_t i_pos )
 357 {
 358     return p_access->pf_seek( p_access, i_pos );
 359 }
 360
 361 /*****************************************************************************
 362  * sout_AccessRead:
 363  *****************************************************************************/
 364 ssize_t sout_AccessOutRead( sout_access_out_t *p_access, block_t *p_buffer )
 365 {
 366     return( p_access->pf_read ?
 367             p_access->pf_read( p_access, p_buffer ) : VLC_EGENERIC );
 368 }
 369
 370 /*****************************************************************************
 371  * sout_AccessWrite:
 372  *****************************************************************************/
 373 ssize_t sout_AccessOutWrite( sout_access_out_t *p_access, block_t *p_buffer )
 374 {
 375 #if 0
 376     const unsigned i_packets_gather = 30;
 377     p_access->i_writes++;
 378     p_access->i_sent_bytes += p_buffer->i_buffer;
 379     if( (p_access->i_writes % i_packets_gather) == 0 )
 380     {
 381         sout_UpdateStatistic( p_access->p_sout, SOUT_STATISTIC_SENT_PACKET, i_packets_gather );
 382         sout_UpdateStatistic( p_access->p_sout, SOUT_STATISTIC_SENT_BYTE, p_access->i_sent_bytes );
 383         p_access->i_sent_bytes = 0;
 384     }
 385 #endif
 386     return p_access->pf_write( p_access, p_buffer );
 387 }
 388
 389 /**
 390  * sout_AccessOutControl
 391  */
 392 int sout_AccessOutControl (sout_access_out_t *access, int query, ...)
 393 {
 394     va_list ap;
 395     int ret;
 396
 397     va_start (ap, query);
 398     if (access->pf_control)
 399         ret = access->pf_control (access, query, ap);
 400     else
 401         ret = VLC_EGENERIC;
 402     va_end (ap);
 403     return ret;
 404 }
 405
 406 /*****************************************************************************
 407  * sout_MuxNew: create a new mux
 408  *****************************************************************************/
 409 sout_mux_t * sout_MuxNew( sout_instance_t *p_sout, const char *psz_mux,
 410                           sout_access_out_t *p_access )
 411 {
 412     static const char typename[] = "mux";
 413     sout_mux_t *p_mux;
 414     char       *psz_next;
 415
 416     p_mux = vlc_custom_create( p_sout, sizeof( *p_mux ), VLC_OBJECT_GENERIC,
 417                                typename);
 418     if( p_mux == NULL )
 419         return NULL;
 420
 421     p_mux->p_sout = p_sout;
 422     psz_next = config_ChainCreate( &p_mux->psz_mux, &p_mux->p_cfg, psz_mux );
 423     free( psz_next );
 424
 425     p_mux->p_access     = p_access;
 426     p_mux->pf_control   = NULL;
 427     p_mux->pf_addstream = NULL;
 428     p_mux->pf_delstream = NULL;
 429     p_mux->pf_mux       = NULL;
 430     p_mux->i_nb_inputs  = 0;
 431     p_mux->pp_inputs    = NULL;
 432
 433     p_mux->p_sys        = NULL;
 434     p_mux->p_module     = NULL;
 435
 436     p_mux->b_add_stream_any_time = false;
 437     p_mux->b_waiting_stream = true;
 438     p_mux->i_add_stream_start = -1;
 439
 440     vlc_object_attach( p_mux, p_sout );
 441
 442     p_mux->p_module =
 443         module_need( p_mux, "sout mux", p_mux->psz_mux, true );
 444
 445     if( p_mux->p_module == NULL )
 446     {
 447         FREENULL( p_mux->psz_mux );
 448
 449         vlc_object_release( p_mux );
 450         return NULL;
 451     }
 452
 453     /* *** probe mux capacity *** */
 454     if( p_mux->pf_control )
 455     {
 456         int b_answer = false;
 457
 458         if( sout_MuxControl( p_mux, MUX_CAN_ADD_STREAM_WHILE_MUXING,
 459                              &b_answer ) )
 460         {
 461             b_answer = false;
 462         }
 463
 464         if( b_answer )
 465         {
 466             msg_Dbg( p_sout, "muxer support adding stream at any time" );
 467             p_mux->b_add_stream_any_time = true;
 468             p_mux->b_waiting_stream = false;
 469
 470             /* If we control the output pace then it's better to wait before
 471              * starting muxing (generates better streams/files). */
 472             if( !p_sout->i_out_pace_nocontrol )
 473             {
 474                 b_answer = true;
 475             }
 476             else if( sout_MuxControl( p_mux, MUX_GET_ADD_STREAM_WAIT,
 477                                       &b_answer ) )
 478             {
 479                 b_answer = false;
 480             }
 481
 482             if( b_answer )
 483             {
 484                 msg_Dbg( p_sout, "muxer prefers to wait for all ES before "
 485                          "starting to mux" );
 486                 p_mux->b_waiting_stream = true;
 487             }
 488         }
 489     }
 490
 491     return p_mux;
 492 }
 493
 494 /*****************************************************************************
 495  * sout_MuxDelete:
 496  *****************************************************************************/
 497 void sout_MuxDelete( sout_mux_t *p_mux )
 498 {
 499     if( p_mux->p_module )
 500     {
 501         module_unneed( p_mux, p_mux->p_module );
 502     }
 503     free( p_mux->psz_mux );
 504
 505     config_ChainDestroy( p_mux->p_cfg );
 506
 507     vlc_object_release( p_mux );
 508 }
 509
 510 /*****************************************************************************
 511  * sout_MuxAddStream:
 512  *****************************************************************************/
 513 sout_input_t *sout_MuxAddStream( sout_mux_t *p_mux, es_format_t *p_fmt )
 514 {
 515     sout_input_t *p_input;
 516
 517     if( !p_mux->b_add_stream_any_time && !p_mux->b_waiting_stream )
 518     {
 519         msg_Err( p_mux, "cannot add a new stream (unsupported while muxing "
 520                         "to this format). You can try increasing sout-mux-caching value" );
 521         return NULL;
 522     }
 523
 524     msg_Dbg( p_mux, "adding a new input" );
 525
 526     /* create a new sout input */
 527     p_input = malloc( sizeof( sout_input_t ) );
 528     if( !p_input )
 529         return NULL;
 530     p_input->p_sout = p_mux->p_sout;
 531     p_input->p_fmt  = p_fmt;
 532     p_input->p_fifo = block_FifoNew();
 533     p_input->p_sys  = NULL;
 534
 535     TAB_APPEND( p_mux->i_nb_inputs, p_mux->pp_inputs, p_input );
 536     if( p_mux->pf_addstream( p_mux, p_input ) < 0 )
 537     {
 538         msg_Err( p_mux, "cannot add this stream" );
 539         TAB_REMOVE( p_mux->i_nb_inputs, p_mux->pp_inputs, p_input );
 540         block_FifoRelease( p_input->p_fifo );
 541         free( p_input );
 542         return NULL;
 543     }
 544
 545     return p_input;
 546 }
 547
 548 /*****************************************************************************
 549  * sout_MuxDeleteStream:
 550  *****************************************************************************/
 551 void sout_MuxDeleteStream( sout_mux_t *p_mux, sout_input_t *p_input )
 552 {
 553     int i_index;
 554
 555     if( p_mux->b_waiting_stream
 556      && block_FifoCount( p_input->p_fifo ) > 0 )
 557     {
 558         /* We stop waiting, and call the muxer for taking care of the data
 559          * before we remove this es */
 560         p_mux->b_waiting_stream = false;
 561         p_mux->pf_mux( p_mux );
 562     }
 563
 564     TAB_FIND( p_mux->i_nb_inputs, p_mux->pp_inputs, p_input, i_index );
 565     if( i_index >= 0 )
 566     {
 567         if( p_mux->pf_delstream( p_mux, p_input ) < 0 )
 568         {
 569             msg_Err( p_mux, "cannot delete this stream from mux" );
 570         }
 571
 572         /* remove the entry */
 573         TAB_REMOVE( p_mux->i_nb_inputs, p_mux->pp_inputs, p_input );
 574
 575         if( p_mux->i_nb_inputs == 0 )
 576         {
 577             msg_Warn( p_mux, "no more input streams for this mux" );
 578         }
 579
 580         block_FifoRelease( p_input->p_fifo );
 581         free( p_input );
 582     }
 583 }
 584
 585 /*****************************************************************************
 586  * sout_MuxSendBuffer:
 587  *****************************************************************************/
 588 void sout_MuxSendBuffer( sout_mux_t *p_mux, sout_input_t *p_input,
 589                          block_t *p_buffer )
 590 {
 591     block_FifoPut( p_input->p_fifo, p_buffer );
 592
 593     if( p_mux->p_sout->i_out_pace_nocontrol )
 594     {
 595         mtime_t current_date = mdate();
 596         if ( current_date > p_buffer->i_dts )
 597             msg_Warn( p_mux, "late buffer for mux input (%"PRId64")",
 598                       current_date - p_buffer->i_dts );
 599     }
 600
 601     if( p_mux->b_waiting_stream )
 602     {
 603         const int64_t i_caching = var_GetInteger( p_mux->p_sout, "sout-mux-caching" ) * INT64_C(1000);
 604
 605         if( p_mux->i_add_stream_start < 0 )
 606             p_mux->i_add_stream_start = p_buffer->i_dts;
 607
 608         /* Wait until we have enought data before muxing */
 609         if( p_mux->i_add_stream_start < 0 ||
 610             p_buffer->i_dts < p_mux->i_add_stream_start + i_caching )
 611             return;
 612         p_mux->b_waiting_stream = false;
 613     }
 614     p_mux->pf_mux( p_mux );
 615 }
 616
 617
 618 /*****************************************************************************
 619  * sout_MuxGetStream: find stream to be muxed
 620  *****************************************************************************/
 621 int sout_MuxGetStream( sout_mux_t *p_mux, int i_blocks, mtime_t *pi_dts )
 622 {
 623     mtime_t i_dts = 0;
 624     int     i_stream = -1;
 625
 626     for( int i = 0; i < p_mux->i_nb_inputs; i++ )
 627     {
 628         sout_input_t *p_input = p_mux->pp_inputs[i];
 629         block_t *p_data;
 630
 631         if( block_FifoCount( p_input->p_fifo ) < i_blocks )
 632         {
 633             if( p_input->p_fmt->i_cat != SPU_ES )
 634             {
 635                 return -1;
 636             }
 637             /* FIXME: SPU muxing */
 638             continue;
 639         }
 640
 641         p_data = block_FifoShow( p_input->p_fifo );
 642         if( i_stream < 0 || p_data->i_dts < i_dts )
 643         {
 644             i_stream = i;
 645             i_dts    = p_data->i_dts;
 646         }
 647     }
 648
 649     if( pi_dts ) *pi_dts = i_dts;
 650
 651     return i_stream;
 652 }
 653
 654
 655 /*****************************************************************************
 656  *
 657  *****************************************************************************/
 658 static int mrl_Parse( mrl_t *p_mrl, const char *psz_mrl )
 659 {
 660     char * psz_dup = strdup( psz_mrl );
 661     char * psz_parser = psz_dup;
 662     const char * psz_access;
 663     const char * psz_way;
 664     char * psz_name;
 665
 666     /* *** first parse psz_dest */
 667     while( *psz_parser && *psz_parser != ':' )
 668     {
 669         if( *psz_parser == '{' )
 670         {
 671             while( *psz_parser && *psz_parser != '}' )
 672             {
 673                 psz_parser++;
 674             }
 675             if( *psz_parser )
 676             {
 677                 psz_parser++;
 678             }
 679         }
 680         else
 681         {
 682             psz_parser++;
 683         }
 684     }
 685 #if defined( WIN32 ) || defined( UNDER_CE )
 686     if( psz_parser - psz_dup == 1 )
 687     {
 688         /* msg_Warn( p_sout, "drive letter %c: found in source string",
 689                           *psz_dup ) ; */
 690         psz_parser = "";
 691     }
 692 #endif
 693
 694     if( !*psz_parser )
 695     {
 696         psz_access = psz_way = "";
 697         psz_name = psz_dup;
 698     }
 699     else
 700     {
 701         *psz_parser++ = '\0';
 702
 703         /* let's skip '//' */
 704         if( psz_parser[0] == '/' && psz_parser[1] == '/' )
 705         {
 706             psz_parser += 2 ;
 707         }
 708
 709         psz_name = psz_parser ;
 710
 711         /* Come back to parse the access and mux plug-ins */
 712         psz_parser = psz_dup;
 713
 714         if( !*psz_parser )
 715         {
 716             /* No access */
 717             psz_access = "";
 718         }
 719         else if( *psz_parser == '/' )
 720         {
 721             /* No access */
 722             psz_access = "";
 723             psz_parser++;
 724         }
 725         else
 726         {
 727             psz_access = psz_parser;
 728
 729             while( *psz_parser && *psz_parser != '/' )
 730             {
 731                 if( *psz_parser == '{' )
 732                 {
 733                     while( *psz_parser && *psz_parser != '}' )
 734                     {
 735                         psz_parser++;
 736                     }
 737                     if( *psz_parser )
 738                     {
 739                         psz_parser++;
 740                     }
 741                 }
 742                 else
 743                 {
 744                     psz_parser++;
 745                 }
 746             }
 747
 748             if( *psz_parser == '/' )
 749             {
 750                 *psz_parser++ = '\0';
 751             }
 752         }
 753
 754         if( !*psz_parser )
 755         {
 756             /* No mux */
 757             psz_way = "";
 758         }
 759         else
 760         {
 761             psz_way = psz_parser;
 762         }
 763     }
 764
 765     p_mrl->psz_access = strdup( psz_access );
 766     p_mrl->psz_way    = strdup( psz_way );
 767     p_mrl->psz_name   = strdup( psz_name );
 768
 769     free( psz_dup );
 770     return( VLC_SUCCESS );
 771 }
 772
 773
 774 /* mrl_Clean: clean p_mrl  after a call to mrl_Parse */
 775 static void mrl_Clean( mrl_t *p_mrl )
 776 {
 777     FREENULL( p_mrl->psz_access );
 778     FREENULL( p_mrl->psz_way );
 779     FREENULL( p_mrl->psz_name );
 780 }
 781
 782
 783 /****************************************************************************
 784  ****************************************************************************
 785  **
 786  **
 787  **
 788  ****************************************************************************
 789  ****************************************************************************/
 790
 791 /* Destroy a "stream_out" module */
 792 static void sout_StreamDelete( sout_stream_t *p_stream )
 793 {
 794     msg_Dbg( p_stream, "destroying chain... (name=%s)", p_stream->psz_name );
 795
 796     if( p_stream->p_module ) module_unneed( p_stream, p_stream->p_module );
 797
 798     FREENULL( p_stream->psz_name );
 799
 800     config_ChainDestroy( p_stream->p_cfg );
 801
 802     msg_Dbg( p_stream, "destroying chain done" );
 803     vlc_object_release( p_stream );
 804 }
 805
 806 /* Destroy a "stream_out" modules chain
 807  *
 808  * p_first is the first module to be destroyed in the chain
 809  * p_last is the last module to be destroyed
 810  *  if NULL, all modules are destroyed
 811  *  if not NULL, modules following it must be destroyed separately
 812  */
 813 void sout_StreamChainDelete(sout_stream_t *p_first, sout_stream_t *p_last)
 814 {
 815     while(p_first != NULL)
 816     {
 817         sout_stream_t *p_next = p_first->p_next;
 818
 819         sout_StreamDelete(p_first);
 820         if(p_first == p_last)
 821            break;
 822         p_first = p_next;
 823     }
 824 }
 825
 826 /* Create a "stream_out" module, which may forward its ES to p_next module */
 827 /*
 828  * XXX name and p_cfg are used (-> do NOT free them)
 829  */
 830 static sout_stream_t *sout_StreamNew( sout_instance_t *p_sout, char *psz_name,
 831                                config_chain_t *p_cfg, sout_stream_t *p_next)
 832 {
 833     static const char typename[] = "stream out";
 834     sout_stream_t *p_stream;
 835
 836     assert(psz_name);
 837
 838     p_stream = vlc_custom_create( p_sout, sizeof( *p_stream ),
 839                                   VLC_OBJECT_GENERIC, typename );
 840     if( !p_stream )
 841         return NULL;
 842
 843     p_stream->p_sout   = p_sout;
 844     p_stream->p_sys    = NULL;
 845     p_stream->psz_name = psz_name;
 846     p_stream->p_cfg    = p_cfg;
 847     p_stream->p_next   = p_next;
 848
 849     msg_Dbg( p_sout, "stream=`%s'", p_stream->psz_name );
 850
 851     vlc_object_attach( p_stream, p_sout );
 852
 853     p_stream->p_module =
 854         module_need( p_stream, "sout stream", p_stream->psz_name, true );
 855
 856     if( !p_stream->p_module )
 857     {
 858         /* those must be freed by the caller if creation failed */
 859         p_stream->psz_name = NULL;
 860         p_stream->p_cfg = NULL;
 861
 862         sout_StreamDelete( p_stream );
 863         return NULL;
 864     }
 865
 866     return p_stream;
 867 }
 868
 869 /* Creates a complete "stream_out" modules chain
 870  *
 871  *  chain format: module1{option=*:option=*}[:module2{option=*:...}]
 872  *
 873  *  The modules are created starting from the last one and linked together
 874  *  A pointer to the last module created is stored if pp_last isn't NULL, to
 875  *  make sure sout_StreamChainDelete doesn't delete modules created in another
 876  *  place.
 877  *
 878  *  Returns a pointer to the first module.
 879  */
 880 sout_stream_t *sout_StreamChainNew(sout_instance_t *p_sout, char *psz_chain,
 881                                 sout_stream_t *p_next, sout_stream_t **pp_last)
 882 {
 883     if(!psz_chain || !*psz_chain)
 884     {
 885         if(pp_last) *pp_last = NULL;
 886         return p_next;
 887     }
 888
 889     char *psz_parser = strdup(psz_chain);
 890     if(!psz_parser)
 891         return NULL;
 892
 893     vlc_array_t cfg, name;
 894     vlc_array_init(&cfg);
 895     vlc_array_init(&name);
 896
 897     /* parse chain */
 898     while(psz_parser)
 899     {
 900         config_chain_t *p_cfg;
 901         char *psz_name;
 902         psz_chain = config_ChainCreate( &psz_name, &p_cfg, psz_parser );
 903         free( psz_parser );
 904         psz_parser = psz_chain;
 905
 906         vlc_array_append(&cfg, p_cfg);
 907         vlc_array_append(&name, psz_name);
 908     }
 909
 910     int i = vlc_array_count(&name);
 911     vlc_array_t module;
 912     vlc_array_init(&module);
 913     while(i--)
 914     {
 915         p_next = sout_StreamNew( p_sout, vlc_array_item_at_index(&name, i),
 916             vlc_array_item_at_index(&cfg, i), p_next);
 917
 918         if(!p_next)
 919             goto error;
 920
 921         if(i == vlc_array_count(&name) - 1 && pp_last)
 922             *pp_last = p_next;   /* last module created in the chain */
 923
 924         vlc_array_append(&module, p_next);
 925     }
 926
 927     vlc_array_clear(&name);
 928     vlc_array_clear(&cfg);
 929     vlc_array_clear(&module);
 930
 931     return p_next;
 932
 933 error:
 934
 935     i++;    /* last module couldn't be created */
 936
 937     /* destroy all modules created, starting with the last one */
 938     int modules = vlc_array_count(&module);
 939     while(modules--)
 940         sout_StreamDelete(vlc_array_item_at_index(&module, modules));
 941     vlc_array_clear(&module);
 942
 943     /* then destroy all names and config which weren't destroyed by
 944      * sout_StreamDelete */
 945     while(i--)
 946     {
 947         free(vlc_array_item_at_index(&name, i));
 948         config_ChainDestroy(vlc_array_item_at_index(&cfg, i));
 949     }
 950     vlc_array_clear(&name);
 951     vlc_array_clear(&cfg);
 952
 953     return NULL;
 954 }
 955
 956 static char *sout_stream_url_to_chain( bool b_sout_display,
 957                                        const char *psz_url )
 958 {
 959     mrl_t       mrl;
 960     char        *psz_chain;
 961
 962     mrl_Parse( &mrl, psz_url );
 963
 964     /* Check if the URLs goes to #rtp - otherwise we'll use #standard */
 965     static const char rtplist[] = "dccp\0sctp\0tcp\0udplite\0";
 966     for (const char *a = rtplist; *a; a += strlen (a) + 1)
 967         if (strcmp (a, mrl.psz_access) == 0)
 968             goto rtp;
 969
 970     if (strcmp (mrl.psz_access, "rtp") == 0)
 971     {
 972         char *port;
 973         /* For historical reasons, rtp:// means RTP over UDP */
 974         strcpy (mrl.psz_access, "udp");
 975 rtp:
 976         if (mrl.psz_name[0] == '[')
 977         {
 978             port = strstr (mrl.psz_name, "]:");
 979             if (port != NULL)
 980                 port++;
 981         }
 982         else
 983             port = strchr (mrl.psz_name, ':');
 984         if (port != NULL)
 985             *port++ = '\0'; /* erase ':' */
 986
 987         if (asprintf (&psz_chain,
 988                       "rtp{mux=\"%s\",proto=\"%s\",dst=\"%s%s%s\"}",
 989                       mrl.psz_way, mrl.psz_access, mrl.psz_name,
 990                       port ? "\",port=\"" : "", port ? port : "") == -1)
 991             psz_chain = NULL;
 992     }
 993     else
 994     {
 995         /* Convert the URL to a basic standard sout chain */
 996         if (asprintf (&psz_chain,
 997                       "standard{mux=\"%s\",access=\"%s\",dst=\"%s\"}",
 998                       mrl.psz_way, mrl.psz_access, mrl.psz_name) == -1)
 999             psz_chain = NULL;
1000     }
1001
1002     /* Duplicate and wrap if sout-display is on */
1003     if (psz_chain && b_sout_display)
1004     {
1005         char *tmp;
1006         if (asprintf (&tmp, "duplicate{dst=display,dst=%s}", psz_chain) == -1)
1007             tmp = NULL;
1008         free (psz_chain);
1009         psz_chain = tmp;
1010     }
1011
1012     mrl_Clean( &mrl );
1013     return psz_chain;
1014 }
1015
1016 #undef sout_EncoderCreate
1017 encoder_t *sout_EncoderCreate( vlc_object_t *p_this )
1018 {
1019     static const char type[] = "encoder";
1020     return vlc_custom_create( p_this, sizeof( encoder_t ), VLC_OBJECT_GENERIC,
1021                               type );
1022 }